Drainage structures and outdoor structures

Abstract

The present invention provides a drainage structure that offers good workability for fixing drainage components and allows for a suitable design. [Solution] The drainage structure 11 comprises a support column 12A that supports a roof structure 14 on which roofing material is installed, a rain gutter 22 provided along the support column 12A, and a drainage component 24A provided at the lower part of the rain gutter 22. The drainage component 24A comprises an outer cylinder 30 into which a cylindrical body 23 constituting the rain gutter 22 is inserted on its inner circumference, and a protruding piece 36 that protrudes upward from the outer cylinder 30. The cylindrical body 23 has a first hole 22ca formed in the first side wall 23aa facing the support column 12A, and the protruding piece 36 has a second hole 36ba formed at a location corresponding to the first hole 22ca. The drainage component 24A is prevented from coming off by a screw 40 that is inserted through the first hole 22ca and the second hole 36ba.

Description

Technical Field

[0001] The present invention relates to a drainage structure provided with a rain gutter and an outdoor structure provided with the drainage structure.

Background Art

[0002] In outdoor structures such as carports, rain gutters are provided along the columns. As such a drainage structure, for example, there is one proposed in Patent Document 1. The column in the drainage structure described in Patent Document 1 has a pair of fin pieces protruding along the longitudinal direction and a groove portion formed by the side surface between the fin pieces.

[0003] A drainage component for defining the drainage direction is provided at the lower part of the rain gutter. The drainage component is provided with a protruding piece at the lower part, and the protruding piece is fixed to the column by a screw.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the drainage structure of Patent Document 1, since the protruding piece is provided at the lower part of the drainage component, screws have to be driven in a low and narrow gap between the ground, and the operator has to take a low posture, which is a burden. Also, the protruding piece and the screw remain exposed, which is not preferable in terms of design.

[0006] The present invention has been made in view of the above problems, and an object thereof is to provide a drainage structure and an outdoor structure that have good workability for fixing the drainage component and can obtain a suitable design.

Means for Solving the Problems

[0007] To solve the above-mentioned problems and achieve the objective, the drainage structure according to the present invention is a drainage structure comprising a support column for supporting a roof structure on which roofing material is installed, a rain gutter provided along the support column, and a drainage component provided at the lower part of the rain gutter, wherein the drainage component comprises an outer cylinder into which a cylindrical body constituting the rain gutter is inserted on its inner circumference, and a protruding piece projecting upward from the outer cylinder, wherein a first hole is formed in the cylindrical body on the side facing the support column, and a second hole is formed in the protruding piece at a location corresponding to the first hole, and the drainage component is prevented from coming off by a retaining device being inserted through the first hole and the second hole. Furthermore, the outdoor structure according to the present invention is characterized by comprising the above-described drainage structure. [Effects of the Invention]

[0008] In this invention, the drainage components have a degree of freedom before being fixed to the support column, resulting in good workability. Furthermore, the protruding pieces and retaining devices are not visible, resulting in a desirable design. [Brief explanation of the drawing]

[0009] [Figure 1] This shows an outdoor structure which is an embodiment of the present invention, with (a) being a front view and (b) being a side view. [Figure 2] This is a cross-sectional view of the front support column. [Figure 3] This is a cross-sectional view of the drainage structure. [Figure 4] This is a side view of the lower end of the drainage structure. [Figure 5] This is a partial cross-sectional perspective view of the lower end of a drainage structure. [Figure 6] This is a disassembled perspective view of the drainage structure. [Figure 7] This is an enlarged cross-sectional view of a portion of the drainage structure. [Figure 8] This is a cross-sectional view of a drainage structure to which the drainage component shown in the modified example is applied. [Figure 9] This is a side view of the lower end of a drainage structure to which the modified drainage component is applied. [Figure 10]This is a partial cross-sectional perspective view of the lower end of a drainage structure to which the modified drainage component is applied. [Figure 11] This is a partially enlarged cross-sectional view of a drainage structure to which the modified drainage component is applied. [Figure 12] This is a cross-sectional view of a drainage structure in which the drainage components according to the modified example are applied in the opposite direction to those in Figure 8. [Modes for carrying out the invention]

[0010] Embodiments of the outdoor structure and drainage structure according to the present invention will be described in detail below with reference to the drawings. However, the present invention is not limited to these embodiments.

[0011] Figure 1 shows an outdoor structure 10, which is an embodiment of the present invention, where (a) is a front view and (b) is a side view. The symbol G represents the ground. The outdoor structure 10 is a carport equipped with four support columns 12A, 12A, 12B, 12B (typically also called support columns 12) erected at approximately the four corners of a parking space S, and a roof structure 14 supported by these support columns 12. The support columns 12 are embedded moderately deep in the ground G and fixed with concrete or the like. The outdoor structure 10 may also be a terrace or the like. The left-right direction is defined as the side, with Figure 1(a) as the reference. The side with support column 12A is the rear, and the side with support column 12B is the front, and the left and right directions are based on the view from the rear. Therefore, in Figure 1(a) as viewed from the front, left and right are reversed.

[0012] Of the four support columns 12, the two rear columns 12A are relatively shorter, and the two front columns 12B are relatively longer, so that the roof structure 14 slopes slightly lower towards the rear. However, the length of each support column 12 is not fixed and is determined according to the construction site and the client's requests. The outdoor structure 10 is large enough to accommodate the parking of multiple vehicles, but if it is relatively small, such as for parking one vehicle, the support columns 12B may be omitted.

[0013] The roof structure 14 is configured by installing roof materials on beams, frame members, etc., and a gutter 14a is provided at the rear end. The roof structure 14 has a large area corresponding to a plurality of vehicles, and a relatively large amount of rainwater may flow into the gutter 14a. One or both of the two columns 12A form a drainage structure 11 according to an embodiment of the present invention. The drainage structure 11 will be described later.

[0014] The front column 12B will be described. FIG. 2 is a cross-sectional view of the front column 12B. The column 12B has a bilaterally symmetric shape and includes a hollow substantially square prism portion 12a and fin pieces 12b that project forward and backward from the four corners of the prism portion 12a. The prism portion 12a has sufficient strength to support the roof structure 14. The prism portion 12a is connected to the roof structure 14 via front and rear brackets 16. Each bracket 16 is fixed to the front and rear walls 12ab of the prism portion 12a by two bolts 18. The brackets 16 and the bolts 18 are near the upper end of the prism portion 12a. In other words, with respect to the column 12B, a wall 12ab along the longitudinal direction and a pair of fin pieces 12b that project from the wall 12ab along the longitudinal direction are provided, and a groove portion 12c that opens front and rear is formed by the wall 12ab and the pair of fin pieces 12b.

[0015] An engaging projection 12ba that projects inward is provided in the middle of each fin piece 12b. The tip of the fin piece 12b is slightly thickened. The fin piece 12b is a portion that engages with an engaging piece 20b described in the next paragraph, has a length required for engagement, and is longer than the total thickness of the head of the bolt 18 and the bracket 16 (for example, about 10.4 mm), but is set to be sufficiently short, for example, about 11 mm. The fin piece 12b and the prism portion 12a form a continuous side surface.

[0016] Cover members 20 are attached to the front and rear of the support column 12B, respectively. The cover members 20 are provided along the support column 12B over substantially the entire length thereof, and have a plate portion 20a and two engaging pieces 20b protruding from the plate portion 20a. The left-right width of the plate portion 20a is equal to that of the support column 12, and the side end portions 20aa abut against the tips of the fin pieces 12b. The engaging pieces 20b protrude from the vicinity of the side end portions 20aa. The cover member 20 is attached to the support column 12 by pressing it toward the support column 12 so that the claws at the tips of the engaging pieces 20b engage with the engaging protrusions 12ba. The heads of the bolts 18 and the brackets 16 are disposed in the groove portions 12c and are covered by the cover member 20. The support column 12, the cover member 20, and the rain gutter 22 described later are extrusion-molded members and are configured to have substantially uniform cross-sections over the entire length along the longitudinal direction. These are basically metal materials containing aluminum or the like, but a resin material may be used for part or all of them depending on conditions.

[0017] Next, the drainage structure 11 will be described. FIG. 3 is a cross-sectional view of the drainage structure 11. FIG. 4 is a side view of the lower end in the drainage structure 11. FIG. 5 is a partial cross-sectional perspective view of the lower end in the drainage structure 11. FIG. 6 is an exploded perspective view of the drainage structure 11. The bracket 16 is omitted in FIG. 6. FIG. 7 is a partially enlarged cross-sectional view of the drainage structure 11.

[0018] The drainage structure 11 includes support columns 12A, one cover member 20, a rain gutter 22 provided along the support column 12A, drainage components 24A, and water guiding components 26. The support column 12A is the same as the support column 12B except for the vertical length, and the roof structure 14 is connected by bolts 18 and brackets 16. While the cover members 20 are provided on the front and rear of the support column 12B, the cover member 20 is provided on the front side of the support column 12A, and the rain gutter 22 is provided on the rear side. Drainage components 24A are provided at the lower part of the rain gutter 22.

[0019] The downspout 22 is a vertical downspout slightly shorter than the support column 12A, and comprises a cylindrical body 23, a pair of engaging pieces 22a protruding from a first horizontal wall 23aa facing the support column 12A on the cylindrical body 23, and a pair of protrusions 22b. The cylindrical body 23 is a hollow rectangle in plan view, comprising a first horizontal wall 23aa and a second horizontal wall 23ab on the side facing the support column 12 and the opposite side, and a first vertical wall 23ac and a second vertical wall 23ad connecting the ends of the first horizontal wall 23aa and the second horizontal wall 23ab. In this application, "horizontal wall" and "vertical wall" are terms used for convenience to distinguish between the two. The first horizontal wall 23aa corresponds to the front wall, and the second horizontal wall 23ab corresponds to the rear wall. The width of the pair of cylindrical bodies 23 is equal to that of the support column 12, and this entire width serves as the flow path for rainwater. A pair of thin, trapezoidal bulges 22c are formed on the first lateral wall 23aa at symmetrical positions slightly separated on the left and right. A first hole 22ca (see Figure 7) is formed near the lower end of each bulge 22c.

[0020] The protrusion 22b extends from the lateral end of the first horizontal wall 23aa toward the support column 12A, making almost contact with the tip of the fin piece 12b and closing the gap between them. The protrusion 22b has a positioning function that limits the forward displacement of the cylindrical body 23. The protruding length of the protrusion 22b is about the thickness of the outer cylinder 30, which will be described later. The lower end of the protrusion 22b is notched, forming a notch 22ba (see Figure 6).

[0021] The engaging piece 22a is located in the same position as the engaging piece 20b, and its tip claw is the same shape, but it is slightly longer than the engaging piece 20b. The length difference between the engaging piece 22a and the engaging piece 20b corresponds to the protruding length of the convex portion 22b. The pair of fin pieces 12b and the pair of engaging pieces 22a engage with each other. The water guide component 26 is attached to the gutter 14a (see Figure 1(b)) via a waterproofing material, and the upper end of the cylindrical body 23 is fitted into it. The water guide component 26 has a small downwardly protruding rectangular tube 26a. The rain gutter 22 is attached to the support column 12 by pressing it against the support column 12, causing the claw at the tip of the engaging piece 22a to engage with the engaging projection 12ba. The head of the bolt 18 and the bracket 16 are covered by the rain gutter 22. In other words, the rain gutter 22 has the same function as the cover material 20.

[0022] Drainage component 24A and drainage component 24B, described later, are made of resin. Drainage component 24A has an outer cylinder 30, a bottom wall 32, a drainage section 34, and a pair of protruding pieces 36. The outer cylinder 30 is a hollow rectangle in plan view, having a first lateral wall 30aa and a second lateral wall 30ab on the side facing the support column 12 and the opposite side, and a first vertical wall 30ac and a second vertical wall 30ad connecting the ends of the first lateral wall 30aa and the second lateral wall 30ab. In drainage component 24A, the first lateral wall 30aa corresponds to the front wall, and the second lateral wall 30ab corresponds to the rear wall. The outer cylinder 30 has a bottom wall 32 and is bottomed, opening upwards. A drainage section 34 is provided in the second lateral wall 30ab, allowing drainage toward the rear. The drainage section 34 is a short cylindrical shape that protrudes to the rear, and has a drainage hole 34a with a sufficient area for drainage. The cylindrical body 23 is inserted and press-fitted into the inner circumference of the outer cylinder 30. In other words, the cylindrical body 23 is in an inner cylinder relationship with the outer cylinder 30. The bottom wall 32 is shaped to collect water into the drainage section 34.

[0023] A pair of protruding pieces 36 are provided at symmetrical positions slightly separated on the left and right sides, corresponding to the bulging portion 22c. The protruding pieces 36 are provided on the first lateral wall 30aa and have a base portion 36a which is integral with the inner circumferential surface of the first lateral wall 30aa below, and an extended portion 36b which protrudes upward from the base portion 36a. A step 36c is formed between the base portion 36a and the extended portion 36b. The first lateral wall 30aa and the extended portion 36b are slightly separated front to back, and this gap is about the thickness of the cylindrical body 23. The extended portion 36b fits into the inner circumferential side of the cylindrical body 23. A shallow trapezoidal recess 36d is formed on the rear surface of the extended portion 36b. The bulging portion 22c fits into the recess 36d, thereby positioning the cylindrical body 23 in the left to right direction.

[0024] A second hole 36ba is formed in the extended portion 36b of the protruding piece 36 at a location corresponding to the first hole 22ca. The second hole 36ba is appropriately larger in diameter than the first hole 22ca and the threaded portion of the screw 40, which will be described later. Multiple small, vertical ribs 30b are formed on the inner circumferential surface of the outer cylinder 30. The ribs 30b position the cylindrical body 23 and maintain it in a press-fit state by applying appropriate pressing force.

[0025] The construction work at the construction site of the drainage structure 11 will be explained, mainly with reference to Figure 6. The support column 12A is erected in the ground G, and the roof structure 14 is connected to its upper part by bolts 18.

[0026] First, the lower part of the cylindrical body 23 of the rain gutter 22 is fitted into the inner circumference of the outer cylinder 30 of the drainage component 24A. The cylindrical body 23 is press-fitted into the outer cylinder 30 and becomes reasonably stable at this point. The extended portion 36b of the protruding piece 36 is recessed into the inner circumference of the cylindrical body 23 and becomes invisible. The extended portion 36b basically contacts the inner surface of the first lateral wall 23aa, but it is acceptable for it to be slightly separated. The lower end of the cylindrical body 23 is positioned vertically by contacting the step 36c. A notch 22ba is formed at the lower end of the convex portion 22b, so there is a gap 38 (see Figure 4) between the cylindrical body 23 and the fin piece 12b, and the first lateral wall 30aa of the outer cylinder 30 passes through the gap 38, allowing the cylindrical body 23 to be fitted inside. The boundary between the notch 22ba and the convex portion 22b is positioned by contacting the upper end of the outer cylinder 30. No sealing material is required between the cylindrical body 23 and the outer cylinder 30.

[0027] Next, the drainage component 24A is secured to the rain gutter 22 by inserting the screw (retainer) 40 from the front side (the side facing the support column) through the first hole 22ca and the second hole 36ba. The screw 40 is screwed into the first hole 22ca, but is only inserted through the second hole 36ba and not screwed in. The drainage component 24A is press-fitted into the outer cylinder 30 and is therefore reasonably stable, but the screw 40 provides an even more reliable retaining effect. The installation of the screw 40 can be done in a comfortable position, for example, with the rain gutter 22 placed on a workbench, making it easy to work with and reducing the burden on the worker. At this point, the first hole 22ca is easily visible, making the installation work easy. Since there are no obstacles around the first hole 22ca, it is possible to use relatively large power tools.

[0028] One reason for this level of workability is that the target to which the drainage component 24A is attached is not an already erected support column 12A, but rather an unfixed, flexible rain gutter 22. The support column 12A does not require screw holes or other means for attaching the drainage component 24A, so there is no concern about water seeping into the square column 12a, and no sealing material is needed to prevent this.

[0029] Although the second hole 36ba is in a position that is not visible, it is larger in diameter than the threaded portion of the screw 40, so even if there is some misalignment, the screw 40 will not seize. In addition, the engagement of the screw 40 with the second hole 36ba prevents the drainage component 24A from shifting, improving workability and assembly.

[0030] Next, the rain gutter 22 is pushed slightly upward at an angle so that the cylindrical body 23 is fitted onto the rectangular tube 26a of the water guiding component 26, and then the rain gutter 22 is pushed forward to engage the engaging piece 22a and the fin piece 12b. This fixes the rain gutter 22 to the rear surface of the support column 12A. The screw 40 is no longer visible, and a desirable design is obtained. At any time, the cover material 20 is pushed in and fixed to the front surface of the support column 12A.

[0031] In the outdoor structure 10 and drainage structure 11 configured in this way, a pair of engaging pieces 22a protrude from the first horizontal wall 23aa on the side of the cylindrical body 23 facing the support column 12A, and are positioned so as not to overlap with the vertical walls 23ac and 23ad in the left-right direction. In other words, the vertical walls 23ac and 23ad of the cylindrical body 23 have two functions: forming a channel wall for rainwater and forming the apparent side wall of the support column 12A, making efficient use of materials. Furthermore, the fin pieces 12b and engaging pieces 22a can be shortened accordingly. Because the engaging pieces 22a and the vertical walls 23ac and 23ad are positioned so as not to overlap in the left-right direction, the cylindrical body 23 can be given a large width in the left-right direction, resulting in good space efficiency and enabling smooth drainage even when the roof structure 14 is large and there is a lot of rainwater. Also, if the roof structure 14 is relatively small, the front-to-back width of the cylindrical body 23 may be reduced.

[0032] Since the cylindrical body 23 is fitted to the inner circumference of the outer cylinder 30, rainwater flowing from above does not leak out of the outer cylinder 30, eliminating the need for special sealing or bonding work and resulting in good workability. A small notch 22ba (see Figure 6) is formed to attach the outer cylinder 30 to the rain gutter 22, but no special processing is required on the support column 12A. The inside of the rectangular cylinder 12a of the support column 12 is maintained as a closed space, preventing water from entering. The rain gutter 22 is smaller and lighter than the support column 12, making it easier to process the notch 22ba.

[0033] In this embodiment, multiple support columns 12 are provided, and a rain gutter 22 is provided on at least one of the rear support columns 12A, while the other support columns 12 are not provided with a rain gutter 22. There are usually two or four support columns 12. In this case, at least one of the support columns 12 may be provided with a rain gutter 22, and at least one may not be provided with a rain gutter 22. Each support column 12 has the same specifications except for its length. The fin piece 12b is set short to match the engagement piece 22a which protrudes forward from the first side wall 30aa, so that there is little waste even when a rain gutter 22 is not provided, and the front-to-back width can be suppressed.

[0034] Since the upper part of the rain gutter 22 is fitted into the water guide component 26, it is raised slightly upward, creating a gap Ga (see Figure 4) between the drainage component 24A and the ground G. However, because the rectangular tube 26a is short, the gap Ga can be made small, which is aesthetically pleasing. There is basically nothing at the bottom of the drainage component 24A, and in consideration of the water guide component 26, it is possible to further reduce the gap Ga, or even make it virtually zero.

[0035] The screw 40 can be any axial retaining device that fits into the first hole 22ca and the second hole 36ba, such as a bolt, rivet, push rivet, press-fit pin, or dowel. The protruding piece 36 may be on the front surface of the first side wall 23aa of the cylindrical body 23, as it will not be visible once the rain gutter 22 is attached to the column 12A. In this case, the first hole 22ca should be larger in diameter than the threaded portion of the screw 40 so that the screw 40 is screwed into the second hole 36ba. In other words, the screw 40 should be screwed into either the first hole 22ca or the second hole 36ba. Note that the screw 40 is basically a separate part from the rain gutter 22. If the screw 40 were integrated with the rain gutter 22, its protruding portion would interfere and prevent the drainage component 24A from being attached.

[0036] In this embodiment, the cylindrical body 23 does not fit into the groove 12c, but a portion of it may be shaped to fit between the two bolts 18. This allows for an even larger flow area of ​​the cylindrical body 23. In this case, the outer cylinder 30 is also shaped to allow the cylindrical body 23 to fit inside. The pair of fin pieces 12b are basically extruded integrally with the support column 12, but depending on the conditions, they may be constructed separately from the rectangular prism portion 12a.

[0037] Next, we will explain drainage component 24B. Figure 8 is a cross-sectional view of the drainage structure 11 to which the drainage component 24B is applied. Figure 9 is a side view of the lower end of the drainage structure 11 to which the drainage component 24B is applied. Figure 10 is a partial cross-sectional perspective view of the lower end of the drainage structure 11 to which the drainage component 24B is applied. Figure 11 is a partially enlarged cross-sectional view of the drainage structure 11 to which the drainage component 24B is applied.

[0038] Drainage component 24B is a modified version of drainage component 24A, and the same reference numerals are used for parts similar to those of drainage component 24A, and detailed explanations are omitted. Drainage component 24B is attached to the lower part of the downspout 22, just like drainage component 24A. In drainage component 24A, the drainage section 34 is provided on the second horizontal wall 30ab, whereas in drainage component 24B, it is provided on the first vertical wall 30ac. In other words, in Figure 8, drainage component 24B can drain to the left. The drainage section 34 is basically provided only on the first vertical wall 30ac. The cylindrical part of the drainage section 34 is approximately equal to the front-to-back width of drainage component 24B.

[0039] The bottom wall 32 slopes downward to the left, and is shaped to collect water in the drainage section 34. In the drainage component 24B, ribs 30b are provided on the side walls 30aa, 30ab and the second vertical wall 30ad.

[0040] The drainage component 24B is provided with four protruding pieces 36. Two are provided on the first side wall 30aa and two are provided on the second side wall 30ab. The two provided on the first side wall 30aa are also called protruding pieces 36A, and the two provided on the second side wall 30ab are also called protruding pieces 36B. The protruding pieces 36A and 36B are positioned and oriented opposite each other front and back. The protruding pieces 36A and 36B have a base portion 36a, an extended portion 36b, and a step 36c, similar to the protruding piece 36 described above. The extended portion 36b is slightly separated from the side walls 30aa and 30ab, and a second hole 36ba and a recess 36d are formed therein. The drainage component 24B is secured to the rain gutter 22 by inserting a screw 40 through the first hole 22ca of the cylindrical body 23 and the second hole 36ba of the protruding piece 36A, similar to the drainage component 24A.

[0041] Figure 12 is a cross-sectional view of the drainage structure 11 in which the drainage component 24B is applied in the opposite direction to that in Figure 8. As shown in Figure 12, the drainage component 24B can be applied in the opposite direction to that in Figure 8. In Figure 12, the drainage component 24B is capable of draining to the right. In this way, the direction of drainage of the drainage component 24B can be changed according to the conditions of the construction site. In the embodiment shown in Figure 12, the second side wall 30ab becomes the front wall and faces the support column 12A, the first side wall 30aa becomes the rear wall, and the drainage component 24B is secured to the rain gutter 22 by inserting the screw 40 through the first hole 22ca of the cylindrical body 23 and the second hole 36ba of the protruding piece 36B. In both Figure 8 and Figure 12, the protruding pieces 36A and 36B are on the inner circumference side of the cylindrical body 23 and are not visible from the outside, which is aesthetically pleasing.

[0042] The present invention is not limited to the embodiments described above, and can be freely modified without departing from the spirit of the invention.

[0043] The drainage structure according to this embodiment is a drainage structure comprising a support column that supports a roof structure on which roofing material is installed, a rain gutter provided along the support column, and a drainage component provided at the lower part of the rain gutter, wherein the drainage component comprises an outer cylinder into which a cylindrical body constituting the rain gutter is inserted on its inner circumference, and a protruding piece that protrudes upward from the outer cylinder, wherein a first hole is formed in the cylindrical body on the side facing the support column, and a second hole is formed in the protruding piece at a location corresponding to the first hole, and the drainage component is prevented from coming off by a retaining device that is inserted through the first hole and the second hole. Furthermore, the outdoor structure according to the present invention is characterized by comprising the above drainage structure.

[0044] In such drainage structures and outdoor structures, the drainage components have flexibility before being fixed to the support posts, resulting in good workability. Furthermore, the protruding pieces and retaining devices are not visible, allowing for a desirable design.

[0045] The cylindrical body may be press-fitted into the inner circumference of the outer cylinder. When the cylindrical body is positioned inside the outer cylinder, there is no water leakage from the cylindrical body, eliminating the need for a seal. Furthermore, the press-fitting provides adequate stability to the drainage component.

[0046] The outer cylinder is rectangular in plan view and comprises a first horizontal wall facing the support column, a second horizontal wall opposite the first horizontal wall, and a first and second vertical wall connecting the ends of the first and second horizontal walls. Drainage holes are formed only in the first vertical wall, and the protruding pieces are provided on the first and second horizontal walls, respectively. When the first horizontal wall faces the support column and when the second horizontal wall faces the support column, the second hole of either of the protruding pieces may be located at a position corresponding to the first hole and on the inner circumference side of the cylinder. This allows the orientation of the drainage component to be changed and the direction of drainage to be altered.

[0047] The retaining device may be a screw threaded into the first or second hole.

[0048] The protruding piece is positioned on the inner circumference of the cylindrical body, and the second hole may be larger in diameter than the retaining device. This prevents the drainage component from shifting due to the retaining device engaging with the second hole, improving workability and ease of assembly. Furthermore, the retaining device will not bite into the second hole. [Explanation of symbols]

[0049] 10 Outdoor structure, 11 Drainage structure, 12 Support column, 12A Support column, 12ab Wall, 12b Fin, 12B Support column, 12c Groove, 14 Roof structure, 20 Cover material, 20b Engaging piece, 22 Rain gutter, 22a Engaging piece, 22b Protrusion, 22ba Notch, 22c Bulge, 22ca First hole, 23 Cylindrical body, 23aa First horizontal wall, 23ab Second horizontal wall, 23ac First vertical wall, 23ad Second vertical wall, 24A Drainage component, 24B Drainage component, 26 Water guide component, 30 Outer cylinder, 30aa First horizontal wall, 30ab Second horizontal wall, 30ac First vertical wall, 30ad Second vertical wall, 32 Bottom wall, 34 Drainage section, 36, 36A, 36B Protruding piece, 36ba Second hole, 38 gap, 40 screw (retainer).

Claims

1. A drainage structure comprising support columns for a roof structure on which roofing material is installed, a rain gutter provided along the support columns, and a drainage component provided at the bottom of the rain gutter, The drainage component comprises an outer cylinder into which the cylindrical body constituting the rain gutter is inserted on its inner circumference, and a protruding piece that protrudes upward from the outer cylinder. The cylindrical body has a first hole formed on the side facing the support column. The protruding piece has a second hole formed in a location corresponding to the first hole. The drain component is prevented from coming off by a retaining device that passes through the first hole and the second hole. A drainage structure characterized by the following features.

2. The cylindrical body is press-fitted into the inner circumference of the outer cylinder. The drainage structure according to feature 1.

3. The outer cylinder is rectangular in plan view and comprises a first horizontal wall on the side facing the support column, a second horizontal wall at a position opposite the first horizontal wall, and a first vertical wall and a second vertical wall connecting the ends of the first horizontal wall and the second horizontal wall, with drainage holes formed only in the first vertical wall. The protruding pieces are provided on the first and second side walls, respectively, and when the first side wall faces the support column and when the second side wall faces the support column, the second hole of either of the protruding pieces is positioned at a location corresponding to the first hole and on the inner circumference side of the cylindrical body. The drainage structure according to feature 1.

4. The retaining device is a screw that is screwed into the first hole or the second hole. The drainage structure according to feature 1.

5. The aforementioned protruding piece is positioned on the inner circumference side of the cylindrical body. The second hole is larger in diameter than the retaining device. The drainage structure according to feature 1.

6. An outdoor structure characterized by comprising a drainage structure according to any one of claims 1 to 5.

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