JP5791141B2 - Drain structure with strainer and strainer - Google Patents

Description

  The present invention relates to a drainage drain structure installed in a drainage hole provided in a base.

  Drains are generally installed in drain holes provided on the rooftop, veranda, balcony, etc. for drainage of rainwater and the like. In addition, a strainer is installed on the top of the drain as a cap for dust removal to prevent clogging of the drainage hole due to falling leaves or dust flowing into the drainage hole. In addition, the strainer is required to be detachably installed in order to clean the dust accumulated in the strainer or to clean the inside of the drain.

  Therefore, in order to easily attach and detach the strainer, it is performed to be fastened to the base with a bolt or the like. In this case, it is necessary to provide a bolt or the like for fixing on the base surface or the like, and the bolt or the like is often integrated with a drain made of casting or the like.

  However, when a waterproof structure including a strainer fixed with bolts or the like is repaired with a waterproof sheet, a method of performing waterproof repair work on an existing drain structure is often employed. In the case of such renovation, a resin drain is inserted into an existing drain and the waterproof sheet is fixed. Therefore, the bolts and screw holes for fixing the strainer, which have been installed with the existing drain structure, cannot be installed in the case of repair work. In addition, since the drain periphery is covered with a waterproof sheet or the like for repair, the existing bolts for fixing the strainer cannot be used. Therefore, in such renovation work, the strainer cannot be screwed in the same manner as the existing drain structure.

  In addition, since the drain made of a casting or the like provided with bolts or the like for fixing is heavy, a burden on the housing becomes a problem in a house or the like, and the drain made of a casting or the like may not be used. Therefore, in such a case as well, the bolts provided on the drain made of casting or the like cannot be used, so that the strainer cannot be screwed.

When the strainer cannot be screwed with a bolt or the like as described above, a strainer provided with a belt-like foot portion can be used. That is, a structure is used in which a belt-like foot provided on the strainer is inserted into the drain, and the belt-like foot contacts the inner wall surface of the drain by the repulsive force of the belt-like foot so that the strainer is fixed to the drain.
However, the strainer inserted into the drain is only fixed by the repulsive force of the belt-like foot portion, and if the belt-like foot portion is slippery with respect to the drain inner wall, the strainer easily comes off. Therefore, if there is not sufficient resistance against strong wind, the strainer may come off or fly.

  As a method for solving this problem, a locking portion is provided at the tip of the belt-like foot portion of the strainer, a locking key portion corresponding to the locking portion is provided inside the drain, and these are fixed by locking (Patent Document 1). There is.

JP 2003-321907 A

However, in the method using the above-described locking mechanism, both the drain and the strainer require a corresponding process for locking, and also in the construction, the belt-type foot locking tool is locked to the drain locking key. There was a problem that it was necessary to do and it was complicated.
Therefore, an object of the present invention is to prevent the strainer from being removed or flying by wind or the like without requiring special processing on the drain side in the strainer installed on the drain as described above.

Means taken in the present invention to solve these problems are as follows.
That is, the gist is that the strainer is prevented from coming off by providing a protrusion on the belt-like foot portion of the strainer inserted into the drain and being hooked on the inner wall surface of the drain.
In particular, by making the protrusion provided on the belt-like foot portion into a flat plate shape, the flat plate protrusion is efficiently hooked on the drain inner wall surface. As a result, the strainer is detachably fixed to the drain.

The present invention has a drain hole provided in a base and a cylindrical part inserted into the drain hole, and at least an inner wall surface of the cylindrical part is inserted into a drain made of synthetic resin and the cylindrical part of the drain. And a strainer body portion provided with a plurality of water passage holes, and a strainer in which a belt-like foot portion made of a spring elastic body is connected to the strainer body portion, and the belt-like foot portion in the plane of the belt-like foot portion of the strainer. A plurality of cut portions are provided on the tip portion side of the cut portion, with a base substantially parallel to the tip portion being left, and the band-shaped foot is formed by raising the cut portion toward the strainer main body with the base as an axis. parts and tabular projections and holes are formed in a plurality of numbers in, characterized in that the strainer by the flat projection is stopped takes on the inner wall of the tubular portion of the drain is fixed to the drain water discharge Is that it Ren structure.

Moreover, the angle of the flat projection with respect to the belt-like foot portion can be set to 15 ° to 70 ° . This makes it easier for the flat projections to be caught on the inner wall surface of the drain .

The belt-like foot portion may be made of a stainless material having a spring limit value of 275 to 1800 N / mm 2 according to JIS G 4313. An appropriate repulsive force is obtained at the belt-like foot portion, and the flat projection provided on the belt-like foot portion is easily retained on the drain inner wall surface.

Moreover, the drainage drain structure whose ratio of the length (L) from the connection part with the said drain of a strip | belt-shaped leg part to the front-end | tip and the diameter (R) of the said drain is L / R = 1.0-3.0, You can also Enlargement of the portion of the belt-like foot that contacts the inner wall surface of the drain makes it easier to stop, and the reduction of the portion that does not contact the inner wall surface of the drain can reduce the impediment to drainage.

  The strainer to be inserted into the drain of the present invention is formed on the strainer main body portion provided with a plurality of water passage holes, a belt-like foot portion made of a spring elastic body connected to the strainer main body portion, and the belt-like foot portion. And a flat projection.

  According to the drain structure of the present invention, the flat projection provided on the belt-like foot connected to the strainer main body is hooked on the inner wall surface of the drain, so that the strainer can be drained without performing any special processing on the drain. Removably fixed to.

Sectional drawing which shows one Embodiment of the drainage drain structure of this invention The perspective view which shows one Embodiment of the strainer of this invention The top view which shows the example of a shape of the strip | belt-shaped leg part of this invention The perspective view which shows one Embodiment of the strip | belt-shaped leg part and flat projection of this invention Plan view of the belt-like foot portion of the present invention Sectional drawing which shows the installation state of the strainer of this invention Sectional drawing which shows the installation state of the strainer of this invention The top view which shows the shape of the front-end | tip of the flat projection of the strainer of this invention The perspective view which showed one embodiment of the processing method of flat protrusion Sectional drawing which shows the state by which the flat projection of the strainer of this invention is hooked on the drain inner wall surface The perspective view which shows the example of a shape of the drain used for this invention Sectional drawing which shows one Embodiment of the drainage drain structure of this invention at the time of renovating the existing drain Sectional drawing which shows other embodiment of the drainage drain structure of this invention at the time of renovating the existing drain Sectional drawing which shows other embodiment of the horizontal drainage drainage structure of this invention

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows an embodiment of the drain structure of the present invention. A drainage hole 4 for drainage is provided in the base 1, a drain 2 having a cylindrical portion 21 is inserted into the drainage hole 4, and a strainer 3 having a strainer main body portion 31 and a belt-like foot portion 32 is inserted into the drain 2. The belt-like foot portion 32 is installed so as to be inserted into the drain. The strainer 3 is installed and fixed to the drain 2 by the flat projection 33 formed on the belt-like leg 32 being hooked on the inner wall surface 23 of the cylindrical portion 21 of the drain 2.

  FIG. 2 shows an embodiment of a strainer used in the present invention. A strainer main body portion 31 having a water passage hole 34 and a belt-like foot portion 32 connected to the strainer main body portion 31 are provided, and a plate-like protrusion 33 is provided on the belt-like foot portion 32.

  The shape of the belt-like foot portion is not particularly limited as long as it is a plate shape, but the one shown in FIG. 3 can be used. That is, a substantially rectangular shape (3-1), a shape with a chamfered tip (3-2), a shape having a narrow portion and a wide portion (3-3) (3-4), and a substantially trapezoidal shape (3-5) Etc. These elements may be combined. For example, (3-4) is a shape having a narrow part and a wide part, and the tip is chamfered.

  In addition, one or more flat projections 33 are provided on the belt-like foot portion 32, and one embodiment is shown in FIG. 4 (4-1). (4-2) is an enlarged view of the plate-like projection portion in another embodiment, but in this example, the triangular plate-like projections 33 are provided in two rows on the belt-like foot portion 32.

  The belt-like foot portion is made of a spring elastic body, and the flat projection 33 provided on the belt-like foot portion 32 is hooked on the inner wall surface 23 of the drain by the repulsive force of the spring elastic body. Here, the spring elastic body used for the belt-like leg portion may be an elastic body that can achieve the above-mentioned purpose, but a metal plate such as iron or stainless steel, a resin plate, or the like is used. Among these, metal is preferable from the viewpoint of durability, and stainless steel is more preferable from the viewpoint of corrosion resistance.

Further, among the stainless steel legs, the stainless steel having a spring limit value of SUS spring material according to JIS G 4313 is preferably 275 to 1800 N / mm 2 from the viewpoint that a stronger spring limit value can be obtained. 300 to 1200 N / mm 2 is more preferable, and 350 to 1000 N / mm 2 is more preferable.
Examples of such spring limit values include SUS301-CSP, SUS304-CSP, SUS631-CSP, and SUS632J1-CSP.

  The thickness and width of the belt-like foot portion can be appropriately selected depending on the application, but the thickness and width affect the strength of the retaining against the drain inner wall surface. That is, the thickness affects the strength with which the belt-like foot is pressed against the inner wall surface of the drain by its repulsive force, and the width affects the contact area of the belt-like foot with the inner wall surface of the drain and affects the strength of the clasp. Therefore, the thickness of the belt-like foot is preferably 0.1 mm to 2.0 mm, more preferably 0.2 mm to 1.5 mm, and still more preferably 0.3 mm to 1.0 mm from the viewpoint of obtaining an appropriate repulsive force.

  The contact area increases as the width of the belt-like foot portion increases. However, since the drain is generally cylindrical, if the belt-like foot portion is flat, the effect of increasing the contact area is small even if the width is too large. On the other hand, it becomes easy to inhibit the drainage inside the drain by increasing the width of the belt-like foot. Therefore, considering that the drain having an inner diameter of about 30 mm to 200 mm is often used, the width of the belt-like foot is preferably 5 mm to 50 mm, more preferably 10 mm to 35 mm, and further preferably 15 mm to 30 mm.

  In addition, since the degree of inhibition of drainage by the belt-like foot portion varies depending on the inner diameter of the drain, the ratio of the width of the belt-like foot portion to the drain inner diameter is preferably 1/3 to 1/40.

Since the belt-like foot portion is inserted into the drain, the belt-like foot portion prevents drainage inside the drain as described above. Therefore, it is preferable that the width of the belt-like foot portion is narrow from the viewpoint of drainage, and it is preferable that the width of the belt-shaped foot portion is wide so that the contact area is large from the aspect of the effect of retaining. Therefore, it is preferable that the belt-like foot portion has a shape that is wide on the contact surface with the drain and the other portions are narrow.
That is, as shown in FIG. 6 (6-1), the width of the inscribed portion 32C in contact with the drain inner wall surface 23 in the belt-like foot portion 32 is widened, and the connecting portion 32A with the drain main body portion to the inscribed portion 32C. If it is set as the connection part 32B, the shape which narrowed the width of the connection part 32B is preferable.
Therefore, as shown in FIG. 5 (5-1), a shape in which the narrow foot portion 32F and the wide wide portion 32H are provided in the belt-like foot portion is preferably used.

When the strip-shaped foot portion having such a shape is inserted into the drain, stress concentrates on the boundary portion 32G between the narrow portion 32F and the wide portion 32H, and the boundary portion 32G becomes a bending point. Then, the narrow portion 32F corresponds to the connection portion 32B, and the wide portion 32H approximately corresponds to the inscribed portion 32C.
That is, as shown in FIG. 6 (6-2), the narrow portion 32F (near the drain inner wall surface 23 is formed while gradually forming an arcuate shape upward from the connecting portion 32A of the strainer body 31 and the belt-like foot portion 32. The connecting portion 32B) extends, and the wide portion 32H (inscribed portion 32C) extends substantially vertically and downward along the drain inner wall surface 23 with the boundary portion 32G as a bending point.

Therefore, by providing the narrow portion 32F and the wide portion 32H, the boundary portion 32G acts as a bending point, so that the wide portion can be an inscribed portion to the drain inner wall surface. In view of the fact that the area of the inscribed portion can be increased, the ratio of the width (W1) of the narrow portion 32F to the width (W2) of the wide portion 32H in FIG. 5 (5-2) is W2 / W1. = 1.2 to 4.5 is preferable, 1.5 to 3.5 is more preferable, and 1.7 to 3 is more preferable.

Also in the case of such a shape, when considering the drainage and the retaining effect, the ratio of the width of each part to the drain inner diameter is preferably 1/10 to 1/40 at the connection part and 1/3 at the inscribed part. ~ 1/20 is preferred.

Further, since increasing the contact area of the belt-like foot with respect to the drain inner wall surface increases the retaining effect, it is preferable to increase the contact area, that is, the inscribed portion of the belt-like foot. Here, increasing the length of the inscribed portion increases the contact area. The length of the inscribed portion is affected by the length of the entire belt-shaped foot portion, that is, the length from the connecting portion to the tip thereof, and the drain inner diameter.
This will be explained with reference to FIG. 7. When the length of the belt-like foot is shorter than the drain inner diameter, the inscribed portion 32C of the belt-like foot is also shortened (7-1), while the length of the belt-like foot is drained. If it is longer than the inner diameter, the inscribed portion 32C of the belt-like foot portion becomes longer, and a latching effect can be expected more. However, in this case, there may be an extra portion 32D that is not inscribed in the drain inner wall surface from the inscribed portion 32C of the belt-like foot portion to the distal end portion 32E (7-2). Further, the remaining portion 32D may be directed inward so as to be separated from the drain inner wall surface 23 by the repulsive force so as to prevent drainage into the drain.

  Therefore, it is preferable that the length (L) from the connection part 32A of the belt-like foot part to the tip part 32E is L / R = 0.8 to 3.5 with respect to the inner diameter (R) of the drain. If L / R is in the above range, there is no hindrance to drainage by the remaining portion of the belt-like foot portion, and the contact area with the drain inner wall surface is increased, which is a preferable mode. More preferably, L / R = 1.0 to 3.0, and still more preferably 1.2 to 2.5.

Further, as shown in FIG. 5, by providing the narrow portion 32F and the wide portion 32H, the boundary portion 32G acts as a bending point, so that the wide portion can be made an inscribed portion to the drain inner wall surface. Therefore, from the viewpoint that the area of the inscribed portion can be increased, the ratio of the length (L1) of the narrow portion 32F to the wide portion 32H (L2) is preferably L2 / L1 = 0.5-3. 0.8 to 2.5 is more preferable, and 1-2 is more preferable.

  The flat projection provided on the belt-like foot portion may be a shape that can be hooked on the inner wall surface of the drain, or may be a flat projection having a pointed tip or a needle-like shape. In particular, if the tip of the flat projection is substantially triangular, it is easy to be hooked and is a preferable shape. FIG. 8 shows a preferable tip portion of such a flat projection, but it is preferable that the tip portion is substantially triangular as in (8-1) to (8-4), and other portions of the flat projection portion. The shape of is not particularly limited. Further, the substantially triangular tip portion includes a substantially trapezoidal shape obtained by cutting a part of the most distal portion of the flat projection (8-5). Such a strainer having a substantially trapezoidal flat plate-like protrusion is easy to insert because the flat plate protrusion is not caught when inserted into the drain. Further, it is preferable that the strainer is not easily caught when the strainer is removed during cleaning or the like, and the removal is easy.

  Further, when the tip of the flat protrusion is substantially triangular, as illustrated in FIG. 8 (8-1), one side 33A and the other side 33B facing the forefront of the flat protrusion in plan view. The angle 33C is preferably 10 ° to 160 °, more preferably 20 ° to 120 °, and still more preferably 30 ° to 90 ° from the viewpoint that it can be easily locked. Further, in the case of the substantially trapezoidal shape as in (8-5), as shown in the enlarged view (8-6) of the broken-line circle part, the side 33A on one side and the other side toward the forefront of the plate-like protrusion It is preferable that the angle 33C formed by extending the side 33B is in the above range.

  The flat projection 33 may be provided at least in a portion of the belt-like foot portion 32 that is in contact with the drain inner wall surface 23. Further, a flat plate-like protrusion may be formed by processing on one belt-like foot portion, or may be formed by joining a separately produced flat plate-like protrusion to the belt-like foot portion. From the viewpoints of easy processing, few manufacturing steps, and low cost, it is preferable to form a flat projection by processing one belt-like foot.

  As a process for forming such a flat projection, it can be provided by performing a cut-and-raft process (cut drawing process). The cutting and raising process (cutting and drawing process) here refers to cutting a plate material and bending the cut part. In this case, bending may be performed by raising a cut portion. For example, as shown in FIG. 9, a triangle cut portion 33 </ b> F is formed by cutting the two sides 33 </ b> D by leaving a triangle base 33 </ b> E with a laser in the plane of the belt-like foot portion 32 (9-2), and drawing with a press And a method (9-3) of raising the notch 33F in the direction of the arrow with the base 33E as an axis. Further, cutting and drawing may be performed simultaneously or in multiple stages by a press machine or the like.

  The angle of the flat protrusions with respect to the belt-like feet is preferably such that the flat protrusions can be easily locked on the inner wall surface of the drain. The angle 33H of the flat protrusions shown in FIG. 10 with respect to the belt-like feet is preferably 15 ° to 70 °, preferably 20 ° to 60 °. ° is more preferable, and 30 ° to 50 ° is more preferable. If the angle of the flat projections with respect to the belt-like feet is larger than 90 °, the resistance in the direction in which the strainer is pulled out, that is, the resistance to the upward force may be weakened.

  When the flat protrusion is formed by making a cut and bending the cut as described above, a hole is formed in the belt-like leg portion by raising the cut portion. Therefore, water can be passed through this hole. Therefore, by forming the plate-like protrusions by such a method (cutting and raising process), it is assumed that the belt-like feet are relatively long with respect to the drain inner diameter, and the remaining portions that are not in contact with the drain inner wall surface as described above. Even if the portion is generated, it is preferable that water can be passed through the hole due to the rise of the cut portion, and the impediment to drainage can be reduced.

  Here, since the drain has a large number of inner diameters, it is most preferable to change the length of the belt-like foot portion according to the drain diameter in consideration of drainage and the retaining effect, but the belt-like foot portions corresponding to various drain diameters are used. It is not easy to prepare. Therefore, when the length of the belt-like foot portion of one length corresponds to a wider range of drain diameter, the inscribed portion of the belt-like foot portion changes according to the drain diameter, so the flat projection is formed in a wide range. There is a need to. Even in such a case, a hole formed by raising a notch provided in the belt-shaped foot portion when forming the flat projections is formed, so that the joint portion existing above and below the inscribed portion and the remaining portion thereof are formed. The hole will be opened, and the drainage performance will not be hindered while obtaining the retaining effect.

  For example, when the length of the belt-shaped foot portion that is a reference for a certain drain inner diameter is defined and a flat projection is formed by cutting and raising in a wide area of the belt-shaped foot portion, the belt-shaped foot portion has a drain inner diameter when the drain inner diameter is small. However, the remaining portion is likely to be generated from the inscribed portion to the tip portion, but a hole formed by raising the cut portion is also provided in this portion, so that drainage can be improved. In addition, when the drain inner diameter is larger than the reference, the connecting part from the inscribed part to the connecting part becomes long, but the hole by opening the notch part is also opened in this part, thereby inhibiting the drainage. Can be reduced. Therefore, it is preferable to provide a flat projection by cutting and raising a wide area of the belt-like foot portion, because a strainer having the length of one belt-like foot portion can achieve both a retaining effect and drainage.

  Here, specifically, it is preferable to provide a plate-like protrusion from the distal end portion 32E of the belt-like foot portion 32 to a position of 90% to 60% with respect to the length of the belt-like foot portion. Here, the length of the belt-like foot portion is the length from the connecting portion 32A to the tip portion 32E.

  The strainer body can be made of metal or resin, but is preferably made of metal from the viewpoint of durability, and is preferably made of lightweight aluminum from the viewpoint of reducing the influence on the housing.

  In FIG. 2, the connection between the strainer main body and the belt-like foot can be fixed with a pedestal 35 having a screw hole provided in the strainer main body and the belt-like foot provided with the screw hole with a screw and a bolt. Further, in FIG. 5, the two belt-like feet 32 can be connected to each other on the connecting portion 32 </ b> A side to form a single shape. In this case, a screw hole with the strainer main body as described above can be provided in a substantially central portion of the two belt-like feet connected to form one.

  Moreover, although two or more belt-like feet can be provided in the strainer main body, two to six are preferable, and two to four are preferable because of the effect of retaining and increasing the drainage due to the increase of the belt-like feet. More preferably, 2 or 4 are more preferable.

  The drain used in the present invention has a cylindrical portion inserted into the drainage hole, and since it is easy to install the drain, it is preferable to have a collar portion connected on the upper surface of the cylindrical portion. An example of a preferable drain shape is shown in FIG. In (11-1), a circular collar portion 22 is connected to the cylindrical tubular portion 21, and in (11-2), a square collar portion 22 is connected to the cylindrical tubular portion 21. Further, (11-3) is an example of a drain shape for horizontal pulling inserted into the drainage hole in the horizontal direction, and a rectangular collar portion 22 bent to a cylindrical tubular portion 21 is connected.

  Further, the drain used in the present invention may be made of synthetic resin, metal, casting or the like. Among these, those made of a synthetic resin such as a thermoplastic resin are preferable from the viewpoint of light weight. In particular, the elastic modulus of the synthetic resin that constitutes the drain is 50 MPa to 2000 MPa because it has moderate rigidity and flexibility, and the flat projections of the belt-like foot portion of the strainer according to the present invention are easily hooked. Preferably, 100 MPa to 1500 MPa is more preferable, and 200 MPa to 1000 MPa is more preferable. Polyolefin such as polyethylene, polypropylene, ethylene-ethyl vinyl acetate copolymer, vinyl chloride resin, ABS resin, acrylic resin, etc. can be used as such a synthetic resin, and melt adhesion with a waterproof sheet made of vinyl chloride resin Considering the above, it is preferable to use a vinyl chloride resin.

  In the drain 2 of the present invention, the inner wall surface 23 can be made of a synthetic resin as described above. As a result, the synthetic resin of the inner wall surface 23 is easily retained by the flat projections, and it is easy to maintain rigidity. Furthermore, the joint portion between the drain 2 and the waterproof sheet 5 can be made of the above-described synthetic resin, which facilitates joining by welding the waterproof sheet 5 and the drain 2 of the present invention. In this case, the waterproof sheet 5 is preferably made of the same kind of synthetic resin at the joint portion of the drain 2. Specifically, it is preferable that the collar portion 22 of the drain 2 is made of a synthetic resin. Moreover, the upper surface of the collar part 22 can also be coat | covered with a synthetic resin layer.

  In the drain having such a synthetic resin layer, the outer peripheral surface of the drain may be covered with the synthetic resin layer. The drain covered with the synthetic resin layer can be obtained by dipping the outer peripheral surface of a core material such as metal.

  In addition, the thickness of the synthetic resin layer is not less than a certain value from the standpoint of the retaining effect and the maintenance of waterproofness because the flat projection is caught or caught by the synthetic resin layer. preferable. Therefore, the thickness of the drain synthetic resin layer is preferably 0.3 mm to 15 mm, more preferably 0.5 mm to 10 mm, and even more preferably 0.7 mm to 7 mm.

As another embodiment, FIG. 12 shows an example of the drain structure in the modification of the existing waterproof layer. The drain 2 for repair is inserted into the existing drain 8, the waterproof sheet 5 that is a waterproof layer newly laid on the collar portion 22 of the drain 2 is joined, and the belt-like foot portion 32 of the strainer 3 is connected to the cylindrical portion of the drain 2. 21 and the strainer 3 is fixed. The new waterproof layer 5 can be fixed to the base by an adhesive bonding method or a machine fixing method. In this embodiment, a vinyl chloride resin waterproof sheet is used as the waterproof sheet 5.
Furthermore, in FIG. 12, after removing the existing strainer (not shown) and the existing waterproof layer (not shown), the level of the existing drain 8 and the base 1 surface is filled with mortar 7 or the like as necessary. It is adjusted. Then, the drain 2 made of vinyl chloride resin for repair is inserted into the existing drain 8, and the waterproof sheet 5 made of vinyl chloride resin is laid so as to cover the drain collar portion 22 and the base 1 surface, and is bonded to the base 1. To fix. Then, the flange portion 22 of the drain 2 made of vinyl chloride resin and the waterproof sheet 5 are melt-bonded by heat or a solvent, and the end portion 11 of the melt-bonded portion is processed by the sealer 6. As a result, the belt-like foot portion 32 of the strainer 3 is inserted into the cylindrical portion 21 of the drain 2, and the flat projection 33 is hooked on the drain inner wall surface 23, whereby the strainer 3 is fixed to the drain 2.
Moreover, in this embodiment, the level difference between the flange portion 22 of the drain 2 and the base 1 is adjusted by filling the mortar 7 or the like, and the waterproof sheet 5 is covered so as to cover the step adjustment portion by the drain flange portion 22 and the mortar or the like. However, adjustment with mortar or the like may be performed as necessary.
In this case, if a strainer connection bolt is installed on the existing drain, it is cut and repaired with mortar as necessary. If the existing drain is provided with a female thread portion for connecting a strainer, it can be repaired with mortar as necessary.

Here, the bonding method is a method of bonding and fixing a waterproof sheet to an underlayer or the like using an adhesive. The mechanical fixing method is a method of fixing a waterproof sheet using a steel plate and a screw. A steel plate is fixed to the ground with screws, etc., and the tipping method to fix the steel sheet and the waterproof sheet laid on it is fixed, or after the waterproof sheet is laid, it is fixed from the upper surface of the waterproof sheet with the steel sheet and screws. There are construction methods. In the post-work method, a reinforcing waterproof sheet is joined to the upper surface of the steel plate. Here, it is preferable to provide a coating layer of the same kind of resin as that of the waterproof sheet on the upper surface of the steel sheet, that is, the joint surface with the waterproof sheet, because the waterproof sheet and the steel sheet can be melted by heat or a solvent. For example, if the waterproof sheet is made of a vinyl chloride resin, a steel plate coated with a vinyl chloride resin is preferable. As the steel plate, a galvanized steel plate or a stainless steel plate can be used, and a stainless steel plate is preferable in consideration of durability. Moreover, the shape can use strip | belt shape, polygonal shape, circular shape, etc.

Yet another embodiment is shown in FIG. The repair drain 2 is inserted into the existing drain 8, a waterproof sheet is laid on the existing presser concrete 10, the brim portion 22 of the repair drain 2 and the waterproof sheet 5 are joined, and the end portion 11 of the waterproof sheet 5 is attached. Waterproof with a liquid sealer 6. The strainer 3 is fixed to the drain 2 by inserting the belt-like foot portion 32 of the strainer 3 into the cylindrical portion 21 of the drain 2 and the flat projection 33 being hooked on the drain inner wall surface 23.
Here, in FIG. 13, the existing waterproof layer 9 around the existing drain 8 is removed and repaired with the mortar 7. Whether or not to remove the existing waterproof layer, including around the drain, can be dealt with according to the site. Then, the waterproof sheet 5A was laid and fixed on the inclined portion 10A of the existing presser concrete 10 with an adhesive, and the waterproof sheet 5A was laid on the flange portion 22 of the drain 2 and fused by heat or a solvent. A steel plate 12 is fixed to a flat field portion 10B of the existing presser concrete 10 with screws 13, and a waterproof sheet 5B is laid on the steel plate 12 and welded to the steel plate 12. At the same time, the waterproof sheet 5A and the waterproof sheet 5B are welded, and the end 11 is connected to the liquid sealer 6 With waterproofing.
Also in this case, if a strainer connection bolt is installed in the existing drain, this is cut and repaired with mortar as necessary. If the existing drain is provided with a female thread portion for connecting a strainer, it can be repaired with mortar as necessary.

In the modified drain structure accompanying the modification of the existing waterproof layer as shown in FIGS. 12 and 13, the existing drain 8 has the cylindrical portion 21 and the collar portion 22, and at least the thermoplastic synthetic resin layer is formed on the upper surface of the collar portion 22. The renovation waterproof sheet 5 is laid by inserting the refurbishment drain 2, and the refurbishment waterproof sheet 5 and the thermoplastic synthetic resin layer of the flange portion 22 of the renovation drain 2 are fused by a solvent or heat. can do.
When a waterproof layer for repair is formed around the drain in this way, providing a female screw portion and a male screw portion for screwing the strainer may impair the waterproof property. Therefore, in such a case, by inserting the strainer according to the present invention into the drain for repair, the strainer can be attached and detached, and the flat projections of the belt-like feet are hooked on the inner wall surface of the drain so as to The strainer can be fixed without using.
Whether or not the existing waterproof layer is to be removed and whether or not the drain periphery and the base surface are to be repaired with mortar or the like may be determined as appropriate. In any case, the drain structure of the present invention can be adopted.

An example of an embodiment related to the horizontal drain structure is shown in FIG. The drain 2 is inserted into the drainage hole 4 provided in the lateral direction, and the strip-shaped foot portion 32 of the strainer 3 is inserted into the cylindrical portion 21 of the drain 2 to fix the strainer 3 to the drain 2.
Although FIG. 14 shows the drain structure in the renovation work with the existing waterproof layer removed, the drainage drain structure of the present invention is not limited to the renovation work, and can also be applied in new construction. In FIG. 14, after removing the existing waterproof layer (not shown), the drain 2 for repair is inserted into the existing drain 8 installed in the drain hole 4 for horizontal pulling. A bellows tube may be connected to the repair drain 2. Moreover, you may repair the base | substrate 1 containing a wall surface with mortar as needed at this time. Then, the brim portion 22 of the repair drain 2 is adhered to the base 1 including the wall surface using an adhesive, and the waterproof sheet 5 is laid and fixed to the base (including the wall surface) with an adhesive so as to cover the collar portion 22. The collar portion 22 and the waterproof sheet 5 were melt-bonded with a solvent or heat, and the end of the waterproof sheet 5 was treated with the liquid sealer 6. The strainer 3 was inserted into the drain for refurbishment from the belt-like foot 32 and fixed.

  Here, the strainer main body of the strainer used in the horizontal drain structure shown in FIG. 14 is a substantially right triangle when viewed from the side. That is, the angle formed by the two sides on the base side when the strainer is inserted into the drain is substantially a right angle. At this time, even if there are two belt-like feet, sufficient fixation is achieved.

1 Base 2 Drain
21 cylindrical part
22 collar
23 inner wall surface 3 strainer
31 Strainer body
32 Banded foot
32A connecting part
32B connection part
32C Inscribed part
32D The rest
32E Tip
33 Flat projection
34 Water hole
35 Base part 4 Drain hole 5 Waterproof sheet 6 Sealer 7 Mortar 8 Existing drain 9 Existing waterproof layer 10 Existing press concrete 11 Edge of waterproof sheet 12 Steel sheet 13 Screw

Claims (6)

Drainage holes provided in the ground,
Having a cylindrical portion inserted into the drainage hole, and at least a drain whose inner wall surface is made of synthetic resin;
A strainer body portion provided with a plurality of water passage holes, inserted into the cylindrical portion of the drain, and a strainer in which a belt-like foot portion made of a spring elastic body is connected to the strainer body portion;
A plurality of cut portions are formed on the plane of the belt-like foot portion of the strainer, and a cut portion is formed on the tip portion side of the belt-like foot portion so as to leave a base substantially parallel to the tip portion, and the cut portion is formed around the base. A plurality of plate-like protrusions and holes are formed in the belt- like foot portion by being raised toward the strainer main body portion, and the plate-like protrusion is hooked on the inner wall of the cylindrical portion of the drain, thereby the strainer. A drainage drain structure characterized in that is fixed to the drain. The drainage drain structure according to claim 1, wherein an angle of the flat projection with respect to the belt-like foot portion is 15 ° to 70 ° . The drainage drain structure according to claim 1 or 2, wherein the belt-like foot portion is made of a stainless material having a spring limit value of 275 to 1800 N / mm2 according to JIS G 4313. The ratio of the length (L) from the connecting portion of the belt-like foot portion to the drain to the tip and the diameter (R) of the drain is L / R = 1.0 to 3.0. The drainage drain structure according to any one of claims 1 to 3. Drainage holes provided in the ground,
An existing drain provided in the drainage hole;
A drain for renovation inserted into the existing drain, having a cylindrical portion, and at least an inner wall surface of the cylindrical portion is made of a synthetic resin,
A strainer main body portion provided with a plurality of water passage holes inserted into the tubular portion of the repair drain, and a strainer in which a belt-like foot portion made of a spring elastic body is connected to the strainer main body portion;
A plurality of flat plate-like protrusions are formed on the belt-like foot portion of the strainer, and the flat plate-like protrusions are hooked on the inner wall of the tubular portion of the repair drain so that the strainer is fixed to the repair drain. Renovation drainage drainage structure characterized by that. A strainer body provided with a plurality of water passage holes;
A belt-like foot portion made of a spring elastic body connected to the strainer body portion;
In the plane of the belt-like foot portion, a plurality of cut portions are provided on the distal end side of the belt-like foot portion, with the base portion substantially parallel to the tip portion being cut, and the cut portion is arranged on the strainer body with the base portion as an axis. It is equipped with a plurality of flat projections and holes formed by rising toward the part ,
A strainer which is formed in a drain hole and has a cylindrical portion, and at least an inner wall surface of the cylindrical portion is inserted into a drain made of a synthetic resin.

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