JP2008291496A - Wastewater drain member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wastewater drain member in which a groove bottom part is formed by bending or joining a steel sheet and a recessed part for guiding wastewater to the groove bottom part is formed, manufacturable at enhanced working efficiency, having good appearance when installed at the corner parts of a building, and having excellent draining property. <P>SOLUTION: The recessed part is formed, adjacent to a drain hole, in the groove bottom part formed by bending or joining a steel sheet by pressing and drawing. A valley-fold V-shaped bent part is formed in the recessed part. The valley-fold V-shaped bent part is preferably formed parallel to the direction from the end edge of the drain hole to the upstreams, and further, from the end edge of the drain hole to the groove bottom part around the recessed part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a drainage drain member installed when waterproofing a rooftop, a veranda, a balcony or the like of a building.

  As an example of a waterproof construction method such as a rooftop of a building, a veranda, a balcony, etc., while disposing and arranging disc-shaped waterproof sheet joining plates made of synthetic resin-coated steel sheets on a flat field part facing the water from the corner part of the building, Drainage drainage members made by processing steel plates are placed at the corners, and they are fixed to the structure with screws and other fasteners. From the top, a synthetic resin tarpaulin is laid, A waterproof construction method is known which is performed by welding, bonding, sticking, or heat-sealing an overlapping portion of a waterproof sheet bonding plate and an overlapping portion of a waterproof sheet and a drainage drain member.

  At this time, the drainage drain member installed in the corner portion has a horizontal type and a vertical type, and the horizontal drainage drain member bends the steel plate to form a rising portion and a groove bottom portion having a substantially L-shaped cross section, and the rising portion. It is manufactured by drilling a drain hole near the corner of the vertical drainage drainage member, bending the steel plate, forming a rising part and a groove bottom in a substantially reverse U-shaped cross section, and opening a drain hole in the groove bottom It is produced by.

  In addition, these drainage drain members have been devised so that the drainage that has flowed into the periphery of the drainage bottom portion can be easily guided to the drainage hole by forming a recess in the groove bottom portion that is recessed below the groove bottom surface. It has been known. (Patent Document 1, Japanese Patent Laid-Open No. 08-013719)

In addition, in order to improve construction efficiency and ensure water tightness, a state in which a corner patch member is joined in the recessed portion in advance before construction, or a hat-like joining member having a collar portion for connecting a drain pipe to the drain hole is inserted. Thus, it is known that the overlapping portion between the flange portion and the drain member main body is preferably joined.
JP 08-013719

  By the way, in the drainage drain member in which the concave part is formed in the groove bottom part of the drainage drain member, the shape of the concave part formed there is a cubic bowl shape, a flat dish shape with a gentle slope in the cross section, the middle Is formed in a hemispherical ball shape or the like, and in order to form it, it is usually done by bending the steel plates and welding the butted edges. However, such processing requires labor and skill. Therefore, in place of this method, in order to improve the production efficiency, a method of forming the recessed portion by press drawing of a steel plate can be considered.

  As an example of such a method, first, as shown in FIG. 6A, the drain hole 5 is formed in the steel plate 10, and then, as shown in FIG. The recessed portion 22a is formed by drawing. Next, as shown in FIG. 4C, the drainage drain member 21 is completed by bending the steel plate 10 into a substantially L-shaped cross section with the vicinity of the boundary between the drain hole 5 and the recessed portion 22a as a base line.

  However, when press drawing is performed on the steel plate in this way, as shown in FIG. 6B, the side edge of the steel plate 10 on the recessed portion 22a side is distorted into a convex shape, and the plate is bent. The drainage drain member 21 obtained in this way is also in a state where the side edges are distorted as shown in FIG. 6C, and when installed in the corner portion of the building, the drainage is separated from the side edges distorted in a convex shape. There was a problem of impeding drainage, such as rainwater was likely to collect at the joint with the groove member, and there was also a problem of obstructing workability on site when installing it. Also, the obtained appearance was not preferable.

  Therefore, the present invention is a drainage drain member in which a groove bottom is formed by bending or joining steel plates, and a recessed portion for guiding drainage is provided in the groove bottom, which can improve the work efficiency of production. An object of the present invention is to provide a drainage drain member that can maintain a good appearance even when installed in a corner of a building and has excellent drainage.

  The inventor has intensively studied and experimented with a method for suppressing the distortion of the side edge of the steel sheet that occurs during press drawing, and as a result, a valley-shaped V-shape is formed in the recessed portion of the steel sheet. It has been found that the above problem can be solved by providing a bent portion.

  That is, the invention according to claim 1 is a drainage drain member in which a groove bottom is formed by bending or joining steel plates, and a drain hole is provided in the groove bottom, and is formed by press drawing adjacent to the drain hole. The gist of the present invention is a drainage drain member provided with a recessed portion and a valley-shaped V-shaped bent portion provided in the recessed portion.

  The invention according to claim 2 is a drainage drain member in which a rising portion and a groove bottom portion are formed in a substantially L-shaped cross section by bending or joining steel plates, and a drain hole is provided in the vicinity of a corner portion of the rising portion. The gist of the drainage drain member is characterized in that a concave portion is provided by press drawing at the bottom of the groove adjacent to the drain hole, and a valley-shaped V-shaped bent portion is provided in the concave portion.

  The invention according to claim 3 is characterized in that the valley-folded V-shaped bent portion is provided in parallel with the direction from the drain hole edge toward the water. Let the drainage drain member of description be a summary.

  The invention according to claim 4 is characterized in that the valley-folded V-shaped bent part is provided from the drain hole edge to the groove bottom around the recessed part. The drainage drain member is taken as the gist.

  The invention according to claim 5 is summarized in the drainage drain member according to any one of claims 1 to 4, wherein the steel plate is a synthetic resin-coated steel plate.

  According to a sixth aspect of the present invention, a hat-shaped joining member having a flange for connecting a drain pipe to the drain hole is inserted, and all or a part of the flange is disposed in the recess, and the recess is The drainage drain member according to any one of claims 1 to 5, wherein the drainage drainage member according to any one of claims 1 to 5 is formed by joining the upper surface of the corresponding flange portion to a position lower than the groove bottom surface around the recessed portion.

  The gist of the drainage drain member according to claim 6, wherein the steel plate is a synthetic resin-coated steel plate, and the hat-shaped joining member is made of a synthetic resin molded product.

  According to the invention concerning Claim 1 and Claim 2, since the recessed part to a steel plate was formed by press drawing, it cuts a steel plate, bends, and obtained by welding a connection part. Compared with the method, there is an effect that the work efficiency for producing the drainage drain member is good and the cost efficiency is excellent. At the same time, since the valley-shaped V-shaped bent part is provided in the recessed part, the distortion of the steel plate that occurs only in the press drawing process is removed, the drainage is excellent, and the corner part of the building is Even when installed, there is an effect that it is a good fit.

  The drainage drain member according to claim 1 is suitable for a horizontal drainage drainage member, and the drainage drainage member according to claim 2 is a drainage member suitable for a vertical drainage drainage member.

  According to the invention concerning Claim 3, since the said valley-folded V-shaped bending part was provided in parallel with the direction which goes to the surface of water from a drain hole edge, distortion of a steel plate is suppressed effectively, and V The bent portion serves as a drainage guide groove, and is particularly effective in drainage.

  According to the invention of claim 4, since the valley-shaped V-shaped bent portion is provided from the drain hole edge to the groove bottom around the recessed portion, the strain generated in the steel plate is further removed, and the drainage Can be reliably guided to the drain hole, and has the effect of further improving drainage.

  According to the invention of claim 5, since the steel plate is a synthetic resin-coated steel plate, it is easy to join the synthetic resin waterproof sheet, the work efficiency for producing the drainage drain member is good, and the effect of being excellent in economic efficiency. is there.

  According to the invention according to claim 6, since the drainage drain member is preliminarily fitted with the hat-shaped joint member having the flange portion for connecting the drainage pipe to the drain hole, the labor of construction relating to the joining with the drainage pipe is reduced. It can be omitted and has the effect of being economical. In addition, since all or part of the flange portion of the hat-shaped joining member is joined in the recessed portion with its upper surface positioned lower than the groove bottom surface around the recessed portion, the level of the bottom surface near the drain hole is increased. There is no effect, rainwater is hard to accumulate, and drainage is excellent.

  According to the invention of claim 7, since the steel plate is made of a synthetic resin-coated steel plate and the hat-like joining member is made of a synthetic resin molded product, the work efficiency for producing the drainage drain member is good, the synthetic resin waterproof sheet and the drainage It is easy to join with the pipe and has the effect of being economical.

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

  FIG. 1 is a perspective view of a drainage drain member 1 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the drainage drain member 1. FIG. 3 shows a cross-sectional view taken along line AA in FIG. FIG. 4 shows a perspective view of the hat-shaped joining member 6 fitted into the drain hole 5 of the drainage drain member 1.

  For example, as shown in FIG. 1, the drainage drain member 1 is formed in a substantially L-shaped cross section by bending or joining a steel plate 10, and a drain hole 5 is provided in the vicinity of a corner portion below the rising portion 3. On the other hand, a concave portion 2a having an upper half-elliptical shape is provided at a position adjacent to the drain hole 5 in the groove bottom 2, and a hat-shaped joining member 6 for connecting the drain pipe 7 is provided in the drain hole 5. A horizontal drainage drain member is shown in which the pipe part 6b is fitted in the drain hole 5 and the flange part 6a is attached to the rising part 3 and the groove bottom part 2 and attached. At this time, as shown in FIG. 2, the upper surface of the flange portion 6a of the hat-shaped joining member 6 joined to the recessed portion 2a is lower than the upper surface of the groove bottom portion 2b around the recessed portion. Furthermore, as shown in FIG. 3, the drainage drain member 1 is provided with a V-shaped bent portion 4 in the vicinity of the substantially central portion of the recessed portion 2a in parallel to the direction from the end edge of the drain hole 5 to the water. In addition, although this drainage drain member 1 has shown what is suitable as a horizontal drain, although it is not illustrated as a vertical drain member, the drain hole 5 is provided in the groove bottom part 2, and there. The configuration is basically the same as that of FIG. 1 except that a concave portion 2a is provided adjacently and surrounding the periphery.

  The steel plate 10 used for the drainage drain member of the present invention may be a single-layer steel plate, but is preferably a synthetic resin-coated steel plate in which the surface of the steel plate is coated with a synthetic resin. In other words, by covering the synthetic resin with a waterproof construction for laying a waterproof sheet made of the same kind of synthetic resin, it is easy to weld, bond, stick, or heat-seal with the waterproof sheet, and the waterproof construction efficiency is good. Because it becomes a thing. Typical synthetic resins include polyvinyl chloride resins and olefin resins.

  A drain hole 5 is provided in the lower corner of the rising portion 3, and a recess 2 a is formed in the groove bottom 2 adjacent to the drain hole 5 by press drawing. There is no particular limitation on the shape of the recessed portion 2a. However, when a cube-shaped bowl with a corner is selected, it is easy to wrinkle at the corner during press drawing, and cracks may occur in some cases. From the finish and workability of the hat-like joining member 6, it is desirable to select an outer peripheral shape having no corners such as a circular shape, a semicircular shape, an oval shape, an elliptical shape, and a semielliptical shape.

  The size of the recessed portion 2a is not limited, but if it is too large, a large pressure is required at the time of press drawing, and it may be difficult to process unless it is a power press machine with a large pressurizing capacity. The drainage drain member 1 that is the subject of the invention preferably has a size that is approximately the same as the area of the drain hole 5, and if this size is used, it is a turret punch press machine or a power press machine that has a corresponding pressurizing capability. It can be processed sufficiently.

  If the depth is too deep, rainwater tends to accumulate in the portion, and wrinkles and cracks are likely to occur in the drawing process. If it is too shallow, drainage is caused by the difference in material thickness when the hat-like joining member 6 is joined. Therefore, it is preferable that the thickness is equal to or slightly deeper than the thickness of the flange portion 6a of the hat-shaped joining member 6.

  The recessed portion 2a is provided adjacent to the drain hole 5 in consideration of drainage properties, and it is particularly preferable that the recessed portion 2a is provided at a position over the edge of the drain hole 5. Further, drawing at such a position is preferable because strain is relieved at the drain drilling portion when it is made after drain drilling.

  The recessed portion 2a is formed by press drawing and can be performed by a steel plate working machine such as a power press machine or a turret punch press machine. If it is processing performed with a power press machine, it is possible to press the steel plate with a mold so as to reduce distortion during drawing, but it is necessary to handle drainage drain members with various shapes Since various molds are required, processing performed with a turret punch press is preferable in consideration of production efficiency. If processing is performed with a turret punch press machine, distortion is slightly generated during drawing processing. Therefore, it is desirable to perform press processing in one step as much as possible. In addition, the mold is small, and it is possible to cope with drainage drain members of various shapes, and the production efficiency is high and the economy is excellent.

  The V-shaped bent portion 4 according to the present invention is provided in the recessed portion 2a in a valley shape. By providing the V-shaped bent portion 4 having such a cross-sectional shape, the groove bottom portion 2b around the recessed portion is prevented from being curved without causing convex distortion, and the drainage drain member 1 is drainable. Excellent in workability and appearance.

  Moreover, it is preferable that the valley-shaped V-shaped bent part 4 is provided in parallel to the direction S from the drain hole 5 edge toward the water. By providing in such a direction, the distortion of the steel plate 10 is more effectively suppressed, and the V-shaped bent portion 4 serves as a drainage guide groove, and is particularly excellent in drainage. It has the effect of becoming.

  Further, the valley-shaped V-shaped bent portion 4 is preferably provided from the edge of the drain hole 5 to the groove bottom portion 2b around the recessed portion. By doing in this way, the convex distortion which arises in the groove bottom part 2b around a recessed part can be removed more effectively, and drainage can also be reliably guided to the drain hole 5. FIG. On the other hand, if the V-shaped bent portion 4 is formed only in the distorted portion of the groove bottom portion 2b around the recessed portion except for the recessed portion 2a, the periphery thereof tends to be convex and should be avoided.

  The length of the V-shaped bent portion 4 is not particularly limited, but when the distance from the edge of the drain hole 5 to the peripheral edge of the recessed portion is L in parallel with the direction S toward the water. , 1.5 L or more is preferable. Furthermore, in order to efficiently guide the drainage to the drain hole 5, it is better to form the V-shaped bent portion 4 locally and to provide a gradient. It is preferable to process with a length of 1.5 to 2.0 L. That is, for example, when the concave portion 2a has a diameter of 50 mm, a preferable length of the V-shaped bent portion 4 is 75 mm or more. If it is less than 1.5 L, distortion may remain in the groove bottom 2b around the recessed portion.

  There is no restriction on the angle of the V-shaped bent portion 4, but if the angle is too small, cracks are likely to occur at the crease, so that a large angle can be achieved if the convex distortion generated during press drawing can be prevented. It is preferable to specify. Specifically, it is preferably 90 to 179 degrees, and more preferably 150 to 179 degrees that can be bent locally. The V-shaped bent portion 4 can be obtained by a steel plate processing machine such as a general press brake machine.

  Further, in the present invention, the hat-shaped joining member 6 having the flange 6a for connecting the drain pipe to the drain hole 5 is fitted, and a part of the flange 6a is in the recessed portion 2a and the recessed portion 2a. It is preferable that the corresponding upper surface of the flange portion 6a is joined at a position lower than the surface of the groove bottom portion 2b around the recessed portion. As shown in FIG. 4, the hat-shaped joining member 6 is composed of a flange portion 6 a and a pipe portion 6 b, and is for joining the drainage drain member provided with the drain hole 5 and the drainage pipe 7. . By joining the flange portion 6a of the hat-like joining member 6 in such a state, the level of the bottom surface near the drain hole 5 does not increase, and rainwater does not accumulate easily and has excellent drainage.

  The material of the hat-like joining member 6 is preferably selected from the same quality as the synthetic resin pipe or the synthetic resin waterproof sheet to be joined, such as a synthetic resin pipe or synthetic resin such as polyvinyl chloride resin or olefin resin. If it is a waterproof sheet, it is preferable to use a synthetic resin such as a polyvinyl chloride resin or an olefin resin having the same composition. By doing so, the production efficiency is good and the water tightness is improved. Examples of the joining method include fitting by screwing and adhesive.

  The hat-shaped joining member 6 is preferably made of a synthetic resin molded product, and in order to obtain this synthetic resin molded product, the synthetic resin can be injection molded. Although not shown, it is more preferable that a corner patch member made of a soft synthetic resin is similarly joined to the joined corner portion in addition to the hat-like joining member 6.

  Next, an example of a method for obtaining the drainage drain member of the present invention will be described with reference to FIG.

  First, as shown in FIG. 5A, a rectangular steel plate 10 is prepared, and a required portion of the steel plate 10 is punched out with a turret punch press to form a drain hole 5.

  Next, as shown in FIG. 5B, a recessed portion 2a is formed at a location adjacent to the drain hole 5 by a turret punch press. Next, parallel to the direction S from the drain hole 5 edge toward the water, from the edge of the drain hole 5 to the position of the groove bottom 2b around the recessed portion, the valley-shaped V-shaped bent portion 4 is formed by a press brake machine. Form. By forming the valley-folded V-shaped bent portion 4 in this way, distortion generated at the side edge of the steel plate 10 is removed.

  Then, as shown in FIG. 5C, the drainage drain member 11 can be obtained by being bent into a substantially L shape with the vicinity of the boundary between the drain hole 5 and the recessed portion 2 a as a base line. Furthermore, if the hat-shaped joining member 6 of FIG. 4 prepared in advance is inserted and joined, the drainage drain member 1 in FIG. 1 can be obtained.

  Next, embodiments of the present invention will be described with reference to examples.

<Example 1>
A synthetic resin-coated steel sheet having a thickness of 1 mm was drilled with a diameter of 65 mm to form a drain hole, and a flat circular recess having a diameter of 50 mm and a depth of 2 mm was formed by press drawing adjacent to the drain hole. . The steel sheet was bent into a substantially L-shaped cross section so that the drain hole became a rising portion and the concave portion became a groove bottom, with the vicinity of the boundary between the drain hole and the recessed portion as a base line. At this time, the length of the groove bottom was set to a total length of 500 mm. Next, parallel to the direction from the drain hole edge toward the water, the angle is 175 degrees over the entire length of the groove bottom including the recess and the groove bottom around the recess starting from the drain hole edge. Were bent into a valley shape to form a V-shaped bent portion. Furthermore, a hat-shaped joining member having a material thickness of 2 mm having a flange portion in the drain hole and a part of the flange portion are bonded in the recessed portion, thereby producing a horizontal drainage drain member. At this time, the upper surface of the collar corresponding to the recessed portion was joined at a position lower than the groove bottom surface around the recessed portion. With respect to this drainage drain member, drainage and appearance were evaluated in the following evaluation items. The results are shown in Table 1.

<Drainage>
About 500 ml of water was poured into the drainage drain member, and the presence or absence of water pool after 30 minutes was evaluated. Especially good when there is no puddle: ◎, good when there is a slight puddle: ○, slightly poor when there is a puddle when installed in a gentle gradient: △, when there is a puddle Was bad: x.
<Appearance>
The appearance (processed finish) of the drainage drain member was evaluated. Especially good when the drainage drain member has no convex distortion: ◎, no convex distortion, but when there is a wrinkle near the press-drawn part: ○, when there is convex distortion Defect: x

<Example 2>
A synthetic resin-coated steel sheet with a thickness of 1 mm is drilled with a diameter of 65 mm to form a drain hole, and adjacent to the drain hole is press-drawn so that a long side is 50 mm, a short side is 30 mm, and a depth is 2 mm. A substantially rectangular recess was formed. The steel plate was bent into a substantially L-shaped cross section so that the drain hole became a rising portion and the recessed portion became a groove bottom. At this time, the length of the groove bottom was set to a total length of 500 mm. Next, in parallel to the direction from the drain hole edge toward the water, the angle from the drain hole edge as a starting point is locally over the length of 100 mm of the groove bottom including the recess and the groove bottom around the recess. The V-folded portion was formed by bending the valley fold so as to obtain a degree. Furthermore, a hat-shaped joining member having a material thickness of 2 mm having a flange portion in the drain hole and a part of the flange portion are bonded in the recessed portion, thereby producing a horizontal drainage drain member. At this time, the upper surface of the collar corresponding to the recessed portion was joined at a position lower than the groove bottom surface around the recessed portion. With respect to this drainage drain member, drainage performance and appearance were evaluated in the same evaluation items as in Example 1. The results are also shown in Table 1.

<Example 3>
A synthetic resin-coated steel sheet with a thickness of 1 mm is drilled with a diameter of 65 mm to form a drain hole, and adjacent to the drain hole, a circular recess having a diameter of 100 mm and a depth of 3 mm is formed by drain drawing. Formed. The synthetic resin-coated steel plate member with the drain hole and recess formed in the groove bottom is combined with a rising portion made of a synthetic resin-coated steel plate with the same thickness of 1 mm facing both sides, and the ends are joined with rivets, It was formed in a substantially inverted U shape. Next, in parallel to the direction from the drain hole edge toward the water, the angle 175 is locally extended over a length of 150 mm of the groove bottom including the recess and the groove bottom around the recess starting from the drain hole edge. The V-folded portion was formed by bending the valley fold so as to obtain a degree. Further, a vertical drainage drain member was manufactured by joining a hat-shaped joining member having a material thickness of 2 mm having a flange in the drain hole and a part of the flange in the recessed portion. At this time, the upper surface of the collar corresponding to the recessed portion was joined at a position lower than the groove bottom surface around the recessed portion. With respect to this drainage drain member, drainage performance and appearance were evaluated in the same evaluation items as in the example. The results are also shown in Table 1.

<Comparative Example 1>
The synthetic resin-coated steel sheet having a thickness of 1 mm was subjected to drain drilling with a diameter of 65 mm to form a drain hole. The drain hole was bent into a rising portion and the recessed portion was bent into a substantially L-shaped cross section so as to be a groove bottom. At this time, the length of the groove bottom was set to a total length of 500 mm. Next, a hat-shaped joining member having a material thickness of 2 mm having a flange portion in the drain hole and a part of the flange portion were bonded to the groove bottom portion, thereby producing a horizontal drainage drain member. With respect to this drainage drain member, drainage performance and appearance were evaluated in the same evaluation items as in the example. The results are also shown in Table 2.

<Comparative example 2>
A synthetic resin-coated steel sheet having a thickness of 1 mm was drilled with a diameter of 65 mm to form a drain hole, and a flat circular recess having a diameter of 50 mm and a depth of 2 mm was formed by press drawing adjacent to the drain hole. . Using the vicinity of the boundary between the drain hole and the recessed portion as a base line, the drain hole was bent into a rising portion, and the recessed portion was bent into a substantially L-shaped cross section. At this time, the length of the groove bottom was set to a total length of 500 mm. Next, a hat-shaped joining member having a material thickness of 2 mm having a flange portion in the drain hole was joined to a part of the flange portion in the recessed portion, thereby producing a horizontal drainage drain member. At this time, the upper surface of the collar corresponding to the recessed portion was joined at a position lower than the groove bottom surface around the recessed portion. With respect to this drainage drain member, drainage performance and appearance were evaluated in the same evaluation items as in the example. The results are also shown in Table 2.

<Comparative Example 3>
A synthetic resin-coated steel sheet having a thickness of 1 mm was drilled with a diameter of 65 mm to form a drain hole, and a flat circular recess having a diameter of 50 mm and a depth of 2 mm was formed by press drawing adjacent to the drain hole. . Using the vicinity of the boundary between the drain hole and the recessed portion as a base line, the drain hole was bent into a rising portion, and the recessed portion was bent into a substantially L-shaped cross section. At this time, the length of the groove bottom was set to a total length of 500 mm. Next, in parallel to the direction from the drain hole edge toward the water, except for the recessed portion, only the portion where the distortion from the position 50 mm away from the drain hole edge to the 100 mm position at the groove bottom around the recessed portion has occurred. In addition, bending processing was performed in a valley shape so as to locally have an angle of 175 degrees, and a V-shaped bent portion was formed. Furthermore, a hat-shaped joining member having a material thickness of 2 mm having a flange portion in the drain hole and a part of the flange portion are bonded in the recessed portion, thereby producing a horizontal drainage drain member. At this time, the upper surface of the collar corresponding to the recessed portion was joined at a position lower than the groove bottom surface around the recessed portion. With respect to this drainage drain member, drainage performance and appearance were evaluated in the same evaluation items as in the example. The results are also shown in Table 2.

  As can be seen from Tables 1 and 2, the drainage drain members of Examples 1 to 3, which are embodiments of the present invention, showed good results in both drainage and appearance. On the other hand, the drainage drain members of Comparative Examples 1 to 3 deviating from the present invention were inferior in either drainage or appearance.

It is a perspective view of a drainage drain member showing an embodiment of this invention. It is sectional drawing of the drainage drain member which shows embodiment of this invention. It is the sectional view on the AA line of FIG. It is a perspective view which shows the hat-shaped joining member concerning this invention. It is a perspective view of the drainage drain member concerning this invention explaining the process in which a concave part is formed by press drawing. It is a perspective view of the conventional drainage drain member explaining the process in which a recessed part is formed by press drawing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,11 Drainage drain member 2 Groove bottom part 2a Recessed part 2b Groove bottom part 3 around a recessed part 3 Rising part 4 V-shaped bending part 5 Drain hole 6 Hat-shaped joining member 6a Gutter part 6b Pipe part 7 Drain pipe 10 Steel plate S On the water Heading

Claims (7)

  A drainage drain member in which a groove bottom is formed by bending or joining a steel plate, and a drain hole is provided in the groove bottom, and a recess is provided by press drawing adjacent to the drain hole. A drainage drain member provided with a valley-like V-shaped bent portion.   A drainage drain member in which a rising portion and a groove bottom portion are formed in a substantially L-shaped cross section by bending or joining a steel plate, and a drain hole is provided near a corner portion of the rising portion, adjacent to the drain hole A drainage drainage member characterized in that a recess is provided at the bottom of the groove by press drawing, and a valley-shaped V-shaped bent portion is provided in the recess.   The drainage drain member according to claim 1, wherein the valley-folded V-shaped bent portion is provided in parallel to a direction from the drain hole edge toward the water.   The drainage drain member according to any one of claims 1 to 3, wherein the valley-shaped V-shaped bent portion is provided from the drain hole edge to the groove bottom around the recessed portion.   The drainage drain member according to any one of claims 1 to 4, wherein the steel plate is a synthetic resin-coated steel plate.   A hat-shaped joint member having a flange for connecting a drain pipe is inserted into the drain hole, and all or a part of the flange is disposed in the recessed portion, and the upper surface of the flange corresponding to the recessed portion is recessed. The drainage drain member according to any one of claims 1 to 5, wherein the drainage drainage member is joined at a position lower than a groove bottom surface around the portion.   The drainage drain member according to claim 6, wherein the steel plate is a synthetic resin-coated steel plate, and the hat-shaped joining member is formed of a synthetic resin molded product.

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