Draining device, installation method thereof, and positioning jig and hook used in the installation method

Abstract

To easily install a draining device when a concrete building is newly constructed.SOLUTION: A draining device 1 is provided with a draining member 11 having a hooking part 11a in a part buried in a concrete building 2 and a hook 12 having an engaged part 13 engaged with the hooking part 11a, the draining member 11 and the hook 12 are fixed to each other by crossing and engaging the hooking part 11a and an engaged part 13 in a non-orthogonal state, when the concrete building 2 is newly constructed, a part of the draining member 11 is projected from the concrete building 2, and the hooking part 11a of the draining member 11 is engaged with the engaged part 13 of the hook 12, and a concrete 3 is placed in a state of being embedded in the concrete building 2, so that the draining device 1 can be easily installed simultaneously with the placing work.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a water-repellent device that blocks the flow of water along the sides or downward surfaces of a concrete structure, a method for installing the water-repellent device, and a positioning jig and hook used in the method for installing the water-repellent device. [Background technology]

[0002] In concrete structures such as bridges, when rainwater flows down the sides and downward during rainy weather, dirt adheres to the concrete surface, damaging its aesthetic appearance. Furthermore, in concrete structures built in cold regions, repeated freezing and thawing of water on the concrete surface can cause the surface layer to deteriorate and peel off. Furthermore, in bridges where the concrete deck is supported by steel piers, rainwater that trickles from the deck to the piers can corrode the piers.

[0003] For this reason, a drainage device is sometimes installed on the side or downward surface of such a concrete structure to block the flow of water along that surface (see, for example, Patent Document 1).

[0004] The water-draining device disclosed in Patent Document 1 is configured so that a female threaded member is embedded in the downward surface of the concrete deck of a bridge, and an attachment bolt that passes through the L-shaped water-draining member is screwed into the female threaded member, thereby attaching the water-draining member to the downward surface of the deck. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 9-13327 Summary of the Invention [Problem to be solved by the invention]

[0006] Incidentally, there are many types of water-draining devices that can be attached to existing bridges, such as the one in Patent Document 1, which can be installed easily and reliably, but such devices are not often seen when installing water-draining devices when constructing new bridges.

[0007] Therefore, an object of the present invention is to make it possible to easily install a drainage device when constructing a new concrete structure. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides a water-draining device that is provided on the surface of a concrete structure and blocks the flow of water along the surface of the concrete structure, and includes a water-draining member that is provided with a portion protruding from the surface of the concrete structure and has a hooking portion at the portion that is embedded in the concrete structure, and a hook that is embedded in the concrete structure and has an engaged portion that engages with the hooking portion of the water-draining member, and the water-draining member and the hook are fixed to each other by engaging the hooking portion and the engaged portion crossing each other in a non-orthogonal manner (Configuration 1).

[0009] The draining device of the above configuration 1 can be easily installed when constructing a new concrete structure by pouring concrete so that part of the draining member protrudes from the surface of the concrete structure and the hooking portion of the draining member is embedded in a fixed position on the hook.

[0010] In the above-mentioned configuration 1, it is desirable that the engagement between the hooking portion of the draining member and the engaged portion of the hook is performed by inserting the hooking portion into an engagement groove formed in the engaged portion and then rotating the hook so that both edges of the engagement groove abut against the hooking portion (configuration 2). In this way, the draining member and the hook can be easily fixed.

[0011] In addition, in the above-mentioned configurations 1 and 2, it is desirable that the root portion of the water-repellent member that protrudes from the surface of the concrete structure (hereinafter also referred to as the "protruding root portion") is formed in a plate shape that extends in a direction that intersects with the flow of water (Configuration 3). In this way, when constructing a new concrete structure, formwork for pouring concrete can be positioned so that it sandwiches the protruding root portion of the water-repellent member from both sides, thereby preventing concrete leakage due to deformation of the water-repellent member when concrete is poured.

[0012] In addition, in the above-mentioned configurations 1 to 3, the hook may be formed with a positioning portion that positions the draining member in the height direction when the engaged portion is engaged with the hook portion (configuration 4). In this way, the draining member can be easily positioned in the height direction.

[0013] On the other hand, the present invention also provides a draining device other than those of the above-mentioned configurations 1 to 4, which does not have the hooks described above. Specifically, the draining device is installed on the surface of a concrete structure to block the flow of water along the surface of the concrete structure, and includes a draining member that is installed in a state where a portion of the draining member protrudes from the surface of the concrete structure and has a hook portion on the portion that is embedded in the concrete structure, and the root portion of the portion that protrudes from the surface of the concrete structure (protruding root portion) is formed in a plate shape that extends in a direction that intersects with the flow of water (Configuration 5). Like the above-mentioned configurations, this draining device of Configuration 5 can also be easily installed when a concrete structure is newly constructed.

[0014] Furthermore, in the above-mentioned configuration 5, a hook may be embedded in the concrete structure and have an engaged portion that engages with the hook portion of the guttering member, and the hook may have a positioning portion that positions the guttering member in the height direction when the engaged portion engages with the hook portion (configuration 6). In this way, the guttering member can be easily positioned in the height direction.

[0015] Furthermore, the present invention provides a method for installing a drainage device of any of the above configurations 1 to 3 or 5, in which, when constructing a new concrete structure, a formwork for pouring concrete is placed so that it sandwiches the vertical center of the drainage member, a positioning jig is inserted between the hook portion of the drainage member and the formwork to position the drainage member vertically, and then concrete is poured (configuration 7).

[0016] In addition, for any of the above-mentioned draining devices of configurations 1 to 3, a method of installation is provided (configuration 8) in which, when constructing a new concrete structure, a formwork for pouring concrete is placed so that it sandwiches the center of the draining member in the vertical direction, a positioning jig is inserted between the hooking portion of the draining member and the formwork to position the draining member in the vertical direction, and then the hooking portion is engaged with the engaging portion of the hook, and concrete is poured.

[0017] According to the installation method of the above configuration 7 or 8, the draining device can be installed at the same time as the concrete pouring work for the concrete structure is carried out in the same manner as usual.

[0018] Here, in the installation method of the above configuration 8, the hook can also be used as the positioning jig (configuration 9).

[0019] The positioning jig of the present invention is used in the installation method of the water-draining device of configuration 7 or 8 above (configuration 10), and the hook of the present invention is used in the installation method of the water-draining device of configuration 9 above and is also used as a positioning jig (configuration 11). [Effects of the Invention]

[0020] According to the present invention, when constructing a new concrete structure, a portion of the drainage member is protruded from the surface of the concrete structure and the hook portion of the drainage member is embedded in the concrete structure when concrete is poured, thereby making it possible to easily install a drainage device at the same time as the pouring work. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is a front cross-sectional view showing an installation state of a draining device according to a first embodiment; [Figure 2] FIG. 2 is a plan view of the main part of the draining device of FIG. [Figure 3] FIG. 2 is an exploded perspective view of the main part of the draining device of FIG. 1; [Figure 4] FIG. 2 is a perspective view illustrating the first step of the fixing method of the drainer device of FIG. 1. [Figure 5] FIG. 5 is a perspective view illustrating the steps of the fixing method of the drainer device, following FIG. 4. [Figure 6] FIG. 6 is a perspective view illustrating the steps of the fixing method of the drainer device, following FIG. 5. [Figure 7] a is a front cross-sectional view illustrating a method for positioning the draining device of FIG. 1, and b is a right side view of a. [Figure 8] a and b are front cross-sectional views illustrating a method for removing the hook used to position the draining device of FIG. 1. [Figure 9] A perspective view of a dedicated positioning jig used to position the draining device of FIG. 1. [Figure 10] FIG. 10 is a perspective view illustrating a method for positioning the drainer using the positioning jig of FIG. [Figure 11] FIG. 10 is a front cross-sectional view illustrating the configuration and installation method of the drainer according to the second embodiment. [Figure 12] FIG. 12 is a front cross-sectional view illustrating the configuration and installation method of a modified example of the draining device of FIG. 11. [Figure 13] 10 is a perspective view of a hook used in the drainer of the third embodiment; [Figure 14] 14 is a front cross-sectional view illustrating a method of installing the draining device of FIG. 13, in which a and b show a state in which the hook portion of the draining member is inserted into the engagement groove of the hook, c shows a state in which the hook is positioned, and d shows a state in which the draining member and the hook are fixed to each other. [Figure 15] 10 is a perspective view of a hook used in the drainer of the fourth embodiment; [Figure 16]16A and 16B are front cross-sectional views showing a method of installing the draining device of FIG. 15, in which FIG. 16A shows a state in which the hooking portion of the draining member is inserted into the engagement groove of the hook, and FIG. 16B shows a state in which the hook is positioned and the draining member and the hook are fixed to each other. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Figures 1 to 3 show a water-draining device 1 of a first embodiment. This water-draining device 1 is installed on the surface of a downward-facing face of a concrete structure 2 when the concrete structure 2 is newly constructed, and is intended to block the flow of water along the surface of the concrete structure 2 (flowing from the side along the downward-facing face), and is equipped with a water-draining member 11 attached to the downward face of the concrete structure 2 and a hook 12 embedded in the concrete structure 2. The concrete structure 2 on which the water-draining device 1 is installed has reinforcing steel bars 4 arranged vertically and horizontally in a plan view, and spacers 5 for positioning the steel bars 4 embedded in the main body of concrete 3.

[0023] The water-repellent member 11 is a long member that extends along the corners of the side and downward surfaces of the concrete structure 2 (almost parallel to the extension direction if the concrete structure 2 is a bridge), with a portion of it protruding from the surface of the concrete structure 2, and is formed by pultrusion molding of FRP. The reason for using FRP as the material is to ensure that the water-repellent member 11 has sufficient rigidity and corrosion resistance to withstand the pouring of concrete when installing the water-repellent device 1, which will be described later. Glass fiber and the like are used as reinforcing materials to be mixed into the resin.

[0024] This water-repellent member 11 is a plate-like member with a cross section that is roughly inverted J-shaped, and at the upper end of the portion that is embedded in the concrete structure 2, it has a hook-shaped hook portion 11a that extends laterally toward the side of the concrete structure 2 and engages with a hook 12 as described below. The lower half of the flat plate portion that is continuous with the hook portion 11a becomes the portion that protrudes from the surface of the concrete structure 2. As a result, water that flows down the side of the concrete structure 2 and along the downward surface is blocked by the protruding portion of the water-repellent member 11, and instead drips down along the protruding portion.

[0025] The hooks 12 are formed integrally with a rectangular plate-shaped engaged portion 13 and a rectangular plate-shaped fixing portion 14 that is longer and narrower than the engaged portion 13, with the two forming a folding screen shape at a predetermined angle, and are arranged at predetermined intervals (for example, 500 mm intervals) along the extension direction of the draining member 11. The material of the hooks 12 is FRP, the same as that of the draining member 11, but it may also be resin that does not contain reinforcing material.

[0026] The engaged portion 13 of the hook 12 has a protrusion 13a with a substantially semicircular cross section protruding from the upper edge of the inward surface and an engagement groove 13b that is substantially T-shaped in front view and opens in the widthwise center of the lower end. The width of the legs of the engagement groove 13b is larger than the width of the hook portion 11a of the flashing member 11. As a result, when installing the flashing device 1, the hook 12 is first placed on a concrete pouring formwork 6 that sandwiches the flat portion of the flashing member 11, as shown in FIG. 4, with the hook portion 11a inserted from the opening of the engagement groove 13b toward the back. Therefore, in this state, the hook 12 can be moved in the extension direction of the flashing member 11 to prevent the hook 12 from interfering with the reinforcing bars 4 arranged in a direction intersecting the extension direction of the flashing member 11.

[0027] Then, as shown in Figure 5, with the hook portion 11a of the drainer member 11 inserted into the engagement groove 13b of the hook 12, the entire hook 12 is rotated in a plane parallel to the extension direction of the drainer member 11, and the both side edges at the back of the engagement groove 13b are abutted against the hook portion 11a, so that the hook portion 11a and the engaged portion 13 of the hook 12 intersect and engage in a non-orthogonal manner, and the drainer member 11 and the hook 12 are fixed to each other.

[0028] Meanwhile, the fixing portion 14 of the hook 12 has anchor portions 14a that protrude laterally from the upper ends on both sides. When the engaged portion 13 is engaged with the hook portion 11a of the flashing member 11 in a non-orthogonal manner as described above, the fixing portion 14 assumes a position approximately parallel to the reinforcing bar 4 arranged in a direction intersecting the extension direction of the flashing member 11, as shown in Figure 6, making it easy to fasten the fixing portion 14 to the reinforcing bar 4. Note that although wire 7 is used as the fastening member for fastening the fixing portion 14 to the reinforcing bar 4, other flexible string-like materials may also be used. By fastening the fixing portion 14 to the reinforcing bar 4 in this manner, the hook 12 and the flashing member 11 fixed to the hook 12 can be more reliably fixed to the concrete 3.

[0029] Furthermore, a recess 14b is formed in the center of the height of the fixing part 14, opening to the side connected to the engaged part 13, and this recess 14b is used to position the drip-proof member 11 in the height direction, which will be described later, before fixing the drip-proof member 11 to the hook 12. In other words, the hook 12 is not only used to fix the drip-proof member 11, but also serves as a positioning jig.

[0030] The following describes how to install the above-described draining device 1. When constructing a new concrete structure 2, the draining device 1 is installed by first placing reinforcing bars 4 and spacers 5 at the concrete pouring position, and then arranging the draining member 11 and a formwork 6 for pouring concrete so that the formwork 6 sandwiches the center of the draining member 11 in the height direction.

[0031] Next, the flashing member 11 sandwiched between the formwork 6 is positioned in the height direction. As shown in Figures 7(a) and (b), the positioning work involves placing the multiple hooks 12 on the formwork 6 so that the recesses 14b of their fixing parts 14 receive the hooking parts 11a of the flashing member 11 and the upper ends of the engaged parts 13 are positioned below the hooking parts 11a, and then lowering the flashing member 11 so that the hooking parts 11a abut against the upper ends of the engaged parts 13. As a result, the flashing member 11 is positioned with the base parts (protruding base parts) of the parts protruding from the surface of the concrete structure 2 sandwiched between the formwork 6.

[0032] 4 to 6, the positioned water-repellent member 11 is then fixed to a hook 12 other than the hook 12 used for positioning, and the hook 12 used for fixing is tied to and fixed to the reinforcing bar 4. Thereafter, the hook 12 used for positioning is gripped by the upper part of its fixing part 14, and as shown in FIG. 8(a), is rotated like a lever around the abutment position between the protrusion 13a at the upper end of the engaged part 13 and the hook part 11a of the water-repellent member 11 as a fulcrum, and is then slid sideways as shown in FIG. 8(b) to remove it from the water-repellent member 11. The removed hook 12 is fixed to the water-repellent member 11 and the reinforcing bar 4 in the same way as the previously fixed hook 12.

[0033] Finally, concrete 3 is poured inside the formwork 6, and after the concrete 3 has hardened, the formwork 6 is removed, completing the installation work of the water draining device 1.

[0034] As described above, the method for installing this water draining device 1 involves pouring concrete 3 when constructing a new concrete structure 2 so that part of the water draining member 11 protrudes from the surface of the concrete structure 2 and the catch portion 11a and hook 12 of the water draining member 11 are embedded in the concrete structure 2. In other words, this water draining device 1 can be installed at the same time as the normal concrete pouring work for the new concrete structure 2 is being carried out.

[0035] While this installation method uses hook 12 to position drainer 11 in the vertical direction, a dedicated positioning jig 15, such as the modified version shown in Figure 9, may also be used. This positioning jig 15 has a simplified overall shape of hook 12, with a rectangular plate-like contact portion 16 without an engagement groove and an L-shaped plate-like operating portion 17 integrally formed at a predetermined angle to form a folding screen. Similar to hook 12, a protrusion 16a with a roughly semicircular cross section is formed on the upper edge of contact portion 16.

[0036] 10, the contact portion 16 can be positioned below the hook portion 11a of the drainer 11, similar to the engaged portion 13 of the hook 12, to perform the positioning operation of the drainer 11. Also, similar to the hook 12, the operating portion 17 can be grasped and rotated to easily remove the drainer 11 from the drainer 11. The angle between the contact portion 16 and the operating portion 17 can be set as desired, and the shape of the operating portion 17 can also be freely changed.

[0037] In the first embodiment described above, the entire protruding portion of the water drainage member from the surface of the concrete structure is formed in the shape of a plate extending in a direction intersecting the flow of water, but the shape of the water drainage member is not limited to this, and for example, the base of the protruding portion can be plate-shaped as in the embodiment, and the lower end can have a hook-shaped cross section, etc.

[0038] Furthermore, the shape of the hook is not limited to that described above, and any shape may be used as long as it has an engaged portion that intersects with the hook portion of the drainer member in a non-orthogonal manner and engages with it.

[0039] 11 shows the configuration and installation method of a draining device 8 of the second embodiment. In this second embodiment, the draining device 8 is composed of only a draining member 21, and does not include a member equivalent to the hook 12 of the first embodiment.

[0040] The water-repellent member 21 of the second embodiment is a long member similar to the water-repellent member 11 of the first embodiment, and is also made of the same FRP material, but differs in that its cross-sectional shape is formed in a cross shape. That is, its cross-sectional shape has a hook portion 21a similar to that of the first embodiment at the upper end of the part that is embedded in the concrete structure 2, and has protruding portions 21b that protrude on both sides in the center in the height direction. Furthermore, flat plate-shaped legs 21c below the protruding portions 21b protrude from the surface of the concrete structure 2 and are designed to block water flowing along the downward-facing surface of the concrete structure 2.

[0041] When installing this draining device 8 (draining member 21), first, it is positioned so that the overhanging portions 21b on both sides rest on the upper surface of the formwork 6. This positions the draining member 21 in the height direction, preventing it from falling out between the formwork 6. Furthermore, waterproof tape (not shown) is attached to the boundary between the tip of the overhanging portion 21b and the upper surface of the formwork 6 to prevent the concrete 3 from leaking out when pouring. Next, the square timbers 9 that support the underside of the formwork 6 are positioned so as to sandwich the protruding portions of the legs 21c from the formwork 6, and the concrete 3 is poured inside the formwork 6. After the concrete 3 hardens, the square timbers 9 and formwork 6 are removed.

[0042] In this installation method, the square timbers 9 support the load acting on the water-repellent member 21 and formwork 6 when pouring the concrete 3, so the difference in the amount of deflection between the water-repellent member 21 and formwork 6 is small, more reliably preventing leakage of the concrete 3. Furthermore, when removing the formwork 6, the anchor effect of the hook portions 21a of the water-repellent member 21 prevents the water-repellent member 21 from falling out of the concrete 3.

[0043] Figure 12 shows the configuration and installation method of a modified example of the draining device 8 (draining member 21) of Figure 11. In this modified example, flat plate-shaped legs 21d extending downward are provided at the tips of the overhanging portions 21b on both sides of the draining member 21. The legs 21d on both sides are formed shorter than the central leg 21c extending downward from the base of the overhanging portion 21b, and with their lower ends exposed on the surface of the concrete structure 2, they, together with the central leg 21c, block water flowing down the downward surface of the concrete structure 2.

[0044] The installation method for this modified example is almost the same as the example shown in Fig. 11. That is, legs 21d on both sides are placed on the upper surface of formwork 6, waterproof tape is attached to the boundary between the tips of legs 21d and the upper surface of formwork 6, square timbers 9 are placed so as to sandwich central leg 21c, concrete 3 is poured inside formwork 6, and after concrete 3 hardens, square timbers 9 and formwork 6 are removed.

[0045] This modified example, like the example shown in FIG. 11, can be installed in a stable state, and has the advantage of having three legs 21c, 21d, which provides more drainage areas than the example shown in FIG.

[0046] 13 shows a hook 12 used in the drainer 1 according to the third embodiment. This hook 12 is the same as the hook 12 of the first embodiment in that it has an engaged portion 13 and a fixed portion 14, but differs in that a positioning portion 22 extends downward from the engaged portion 13, no recess 14b is formed in the fixed portion 14, and the engaging groove 13b is formed in an inverted L shape.

[0047] When installing the draining device 1, first, as shown in Figures 14(a) and 14(b), the hook 12 is placed upright with the lower end of the positioning portion 22 of the hook 12 abutting against the formwork 6, and the hook portion 11a of the draining member 11 is inserted into the engagement groove 13b of the hook 12. Then, as shown in Figure 14(c), the hook portion 11a is abutted against the inner bottom surface of the engagement groove 13b, thereby positioning the hook 12 in the height direction. Next, as shown in Figure 14(d), the entire hook 12 is rotated in a plane parallel to the extension direction of the draining member 11, so that both inner edge portions of the engagement groove 13b abut against the hook portion 11a, thereby engaging the hook portion 11a with the engaged portion 13 of the hook 12 in a non-orthogonal intersecting manner, and the draining member 11 and the hook 12 are fixed to each other. According to the configuration of the third embodiment, the positioning of the draining member 11 can be performed simultaneously with the fixing of the draining member 11 to the hook 12, thereby significantly improving the work efficiency.

[0048] 15 shows a hook 12 used in the water drainer 1 according to the fourth embodiment. This hook 12 is the same as the hook 12 of the third embodiment in that the positioning portion 22 extends downward, but differs in that the engaged portion 13 is a single flat plate integrated with the fixing portion 14, and in the shape of the engaging groove 13b formed in the engaged portion 13.

[0049] When installing the draining device 1, first, as shown in FIG. 16(a), the hook 12 is placed upright with the lower end of the positioning portion 22 of the hook 12 abutting against the formwork 6, and the hook portion 11a of the draining member 11 is inserted into the engagement groove 13b of the hook 12. Then, as shown in FIG. 16(b), the draining member 11 is slid downward within the engagement groove 13b to engage the hook portion 11a with the engagement groove 13b, thereby positioning the hook 12 in the height direction and securing the draining member 11 and the hook 12 to each other. As with the configuration of the third embodiment, the configuration of the fourth embodiment allows the positioning of the draining member 11 and the securing of the hook 12 to be performed simultaneously, thereby significantly improving work efficiency.

[0050] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above meaning, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0051] 1, 8 Draining device 2. Concrete structures 3. Concrete 4. Reinforced concrete 6. Formwork 9. Timber 11 Draining material 11a Hook 12 Hooks 13 Engaged part 13b Engagement groove 14 Fixed part 14b Recess 15 Positioning jig 16 Contact part 17 Control section 21 Draining material 21a Hook 21b Overhang 21c, 21d legs 22 Positioning part

Claims

1. A water draining device that is installed on the surface of a concrete structure and blocks the flow of water along the surface of the concrete structure, The concrete structure is provided with a water-repellent member that is provided with a portion protruding from the surface of the concrete structure and has a hook portion at the portion that is embedded in the concrete structure, and a hook that is embedded in the concrete structure and has an engaged portion that engages with the hook portion of the water-repellent member, A draining device characterized in that the draining member and the hook are fixed to each other by engaging the hooking portion and the engaged portion in a non-orthogonal crosswise manner.

2. The draining device described in claim 1, characterized in that the engagement between the hooking portion of the draining member and the engaged portion of the hook is achieved by inserting the hooking portion into an engagement groove formed in the engaged portion, rotating the hook, and abutting both edges of the engagement groove against the hooking portion.

3. 2. The water draining device according to claim 1, wherein the base of the water draining member that protrudes from the surface of the concrete structure is formed in a plate shape that extends in a direction that intersects with the flow of water.

4. 2. The drainer device according to claim 1, wherein the hook is formed with a positioning portion for positioning the drain member in the height direction when the engaging portion is engaged with the hooking portion.

5. A water draining device that is installed on the surface of a concrete structure and blocks the flow of water along the surface of the concrete structure, A drainage member is provided in a state where a part of the drainage member protrudes from the surface of the concrete structure and has a hook portion at a portion where the drainage member is embedded in the concrete structure, A draining device characterized in that the base of the draining member protruding from the surface of the concrete structure is formed in a plate shape extending in a direction intersecting the flow of water.

6. The draining device described in claim 5, further comprising a hook that is embedded in the concrete structure and has an engaging portion that engages with the hooking portion of the draining member, and the hook is formed with a positioning portion that positions the draining member in the vertical direction when the engaging portion is engaged with the hooking portion.

7. The method for installing a drainer according to any one of claims 1 to 3 or 5, A method for installing a water drainage device, characterized by the following: when constructing a new concrete structure, a formwork for pouring concrete is placed so that it sandwiches the center of the height of the water drainage member, a positioning jig is inserted between the hook portion of the water drainage member and the formwork to position the water drainage member in the height direction, and then concrete is poured.

8. The method for installing a drainer according to any one of claims 1 to 3, A method for installing a water drainage device, characterized in that when constructing a new concrete structure, a formwork for pouring concrete is placed so that it sandwiches the center of the height of the water drainage member, a positioning jig is inserted between the hooking portion of the water drainage member and the formwork to position the water drainage member in the height direction, the hooking portion is engaged with the engaging portion of the hook, and then concrete is poured.

9. The method for installing a drainer device according to claim 8, wherein the hook also serves as the positioning jig.

10. A positioning jig used in the method for installing a water draining device according to claim 7.

11. A hook used in the method for installing a drainer according to claim 9.

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