JP2000328543A - Connection structure of board material to concrete structure, and embeded structure of board material for forming drainage groove into concrete floor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance connection strength between concrete and board material so as to prevent separation of connection surface by forming a plurality of through holes for placed concrete at intervals at an extension flange of the board material in forming a concrete structure. SOLUTION: In connecting structure to connect a board P for forming a drainage groove to a concrete structure F, an extension flange 4 extending downward is bendwise integrated with an outer edge of a flange 3 of the board P, and a plurality of through holes (h) are formed at intervals in the flange 4. Accordingly, in a concrete placing step, the concrete can be flowed smoothly in an inner space of the flange 4 through the holes (h), thereby improving the connection strength between the concrete and the board, preventing separation of connection surfaces and prevent oxidization of concrete beforehand.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure between a plate member and a concrete structure, and a structure for burying a drainage groove forming plate member in a concrete floor.

[0002]

2. Description of the Related Art A concrete structure and a plate material (for example, an edge frame material,
Partitioning material, joint forming material, etc.) together with the concrete molding of the concrete structure, so that the outer surface of one end of the plate and the outer surface of the concrete structure connected to the one end are substantially flush with each other. The connection structure between the plate and the concrete structure is conventionally known.

In addition, a drain groove forming plate material having a concave surface with an open upper surface is buried in a concrete floor, and the concave surface forms a drain groove. A buried structure in a concrete floor of a drainage-forming plate material in which a pair of upper edges are integrally formed with an outwardly directed flange portion that is substantially flush with the floor surface and integrally connected to the floor is also conventionally known (for example, Japanese Patent No. 2566506). Reference).
Drains described in that publication are provided under the floor of kitchens, bathrooms, food factories, kitchens, lunch centers, etc., and are used to smoothly drain the floor and keep the environment sanitary. You.

[0004]

However, in the above-mentioned conventionally known connection structure between a plate and a concrete structure, a connection end between one end of the plate and the concrete structure (generally called "joint"). The joint surface is not well-adapted, for example, if impact or vibration is applied to the plate material from the outside after the construction is completed, the joint surface will peel off, and drainage etc. will seep into the gaps and cause problems such as oxidation of concrete. May be caused.

[0005] Further, in particular, the above-mentioned conventionally known plate material for forming a drain gutter.
In the structure buried in the concrete floor,
(A) for forming a drain groove to be an opening edge of the drain groove
Plate P ₁Outer edge flanges on a pair of upper edges on the left and right
The part 03 is integrally connected, and this flange part 03
Is a large load from moving objects and pedestrians on the floor (this load
Partly, the upper end of the drainage groove forming plate P is made of concrete.
Acts in the direction of pulling away from the floor, that is, in the direction of narrowing the groove opening
) Is frequently added, so that the edge flange portion 03
At the connection end (joint) between the outer end and the concrete floor F
Concrete peeling is likely to occur. In addition, the floor surface
The drainage water flows into the drainage ditch.
If separation occurs, a large amount of drainage will seep into the gap.
To oxidize concrete early or
Problems such as propagation of various bacteria and unsanitaryness become apparent.

[0006] Therefore, we continuously provided familiar well to to solve the above problems, for example, the upper edge of the drainage groove forming plate P _2, as shown in FIG. 11 (b) between the flange portion and the concrete for the border It is conceivable that a downward extension flange portion 04 is integrally bent at the outer end of the outward rimming flange portion 03 and concrete is cast inside and outside the extension flange portion 04. It is difficult to evenly cast the concrete to every corner of the grooved space S inside the extension flange portion 04, and a void remains immediately below the edging flange portion 03. The strength of the part is reduced, and inconveniences such as generation of abnormal noise when walking occur.

In order to eliminate such inconvenience,
For example, FIG. 11 drainage groove forming plate P _3, as shown in (c)
And the extension flange portion 04 inside the groove-shaped space S immediately below the border flange portion 03 which is provided continuously to the upper edge of, immediately below the spatial S with advance filled with mortar m during manufacture of the plate material P ₂ (For example, see Japanese Patent No. 2736514) has been proposed, but in this case, the filling of the mortar m and the reinforcement t
Manufacturing process of the drainage groove forming plate P ₃ for such attachment there is a costly problem complicated. Further, according to this proposal, a horizontal outward coking support step 04 'is integrally formed at the outer end of the extension flange portion 04, and the joint bar M is fixed on the caulking support step 04' to cast concrete. Since the joint bars M are removed after the concrete is solidified and the space after the removal is coated with an appropriate resin, the construction work is very complicated as a whole.

Further, the surface of the conventional drain groove forming plate material is
Since it was formed on a smooth surface by a stainless steel hairline finish or the like, there was also a problem that it easily slipped when wet with water.

The present invention has been made in view of the above circumstances, and can solve the above-mentioned problems and disadvantages of the conventional structure with a simple structure, and can provide a joint structure between a plate and a concrete structure, and a drainage structure. An object of the present invention is to provide a structure in which a groove-forming plate is buried in a concrete floor.

[0010]

According to one aspect of the present invention, a concrete structure and a plate covering at least a part of an outer surface thereof are integrally formed together with the molding of the concrete structure. In a joint structure between a plate member and a concrete structure, the outer surface of one end portion of the plate member and the outer surface of the concrete structure connected to the one end portion are substantially flush with each other. An extension flange portion extending inward from the edge of the concrete structure is integrally bent and formed, and a plurality of through-holes through which cast concrete can flow at the time of molding the concrete structure are formed in the extension flange portion. It is characterized by being formed at intervals. According to this feature, when pouring concrete to form a concrete structure,
Because the poured concrete can flow smoothly inside and outside the extension flange through the through hole,
The concrete goes around every corner of the inner space of the flange portion, and the bonding strength between the concrete and one end of the plate material is effectively increased, so that the connection surface at the connection end (joint) between the two is very good. Becomes As a result, even if external impact or vibration is applied to the plate after completion of the construction, the peeling of the joint surface can be effectively prevented, so that drainage etc. soaks between the joint surfaces to oxidize concrete. Is prevented from occurring. Moreover, since the cast concrete flows well to every corner of the inner space of the extension flange portion as described above, no void is formed on the back side of the plate material, so the inconvenience caused by the presence of the void, that is, the concrete structure Intensity reduction and generation of abnormal noise can be avoided.

According to a second aspect of the present invention, a drain groove forming plate having a concave surface with an open upper surface is embedded in a concrete floor, and the concave surface forms a drain groove opening to the floor surface.
To the concrete floor of a drainage-forming plate, in which a pair of left and right upper edges of the plate serving as the opening edges of the drainage are integrally connected with outwardly directed edging flanges substantially flush with the floor surface. In the buried structure, an extension flange portion extending downward so as to be buried in a concrete floor is integrally bent and formed at an outer edge of the edge flange portion, and a plurality of through holes are provided in the extension flange portion at intervals. Characterized by being formed with According to this feature, when the concrete is cast in order to form the concrete structure, the cast concrete can flow smoothly inside and outside the extended flange portion through the through hole, so that the flange portion has The concrete goes around every corner of the inner space, and the bonding strength between the concrete and the upper edge of the plate material is effectively increased, and the familiarity of the joint surface at the connection end (joint) between the two becomes very good. Thereby, even after a large load is frequently applied to the edging flange portion from a moving body or a pedestrian on the floor surface after the completion of the construction, the separation of the joining surface can be effectively prevented. Problems such as oxidization of concrete due to the infiltration of wastewater or propagation of various bacteria and becoming unsanitary can be avoided beforehand. Moreover, since the cast concrete flows well to every corner of the inner space of the extension flange portion as described above, a void is not formed immediately below the edging flange portion. The strength of the opening edge of the opening and the generation of abnormal noise during walking can be avoided.

According to a third aspect of the present invention, in addition to the features of the second aspect, a non-slip is integrally provided on the upper surface of the flange portion for edging.
Even if the upper surface of the edging flange is wetted by drainage flowing along the floor to the drainage groove side, it is possible to effectively prevent a pedestrian from slipping.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below based on embodiments of the present invention illustrated in the accompanying drawings. 1 to 6 show a first embodiment of the present invention, in which FIG. 1 is a plan view of a kitchen, and FIG. 2 is a vertical sectional view of a main part of a drain (FIG. 1). 2-2
3 is a partially cutaway perspective view of a floor showing a construction state of the drain groove, and FIG. 4 is an enlarged sectional view showing an opening edge of the drain groove (4-4 in FIG. 3). 5 is a perspective view of an essential part (an enlarged perspective view corresponding to the enlarged display section in FIG. 3) showing a modification of the non-slip in the drain groove forming plate material, and FIG. It is sectional drawing which shows the modification with which the cross-sectional shape of a board | plate material differs simply. 7 to 10 show a second embodiment of the present invention.
FIG. 8 is a vertical sectional view of a main part corresponding to FIG. 2, showing a drain groove, FIG. 8 is a perspective view corresponding to FIG. 3, showing a construction state of the drain groove, and FIG.
FIG. 8 is a sectional view corresponding to FIG.
FIG. 10 is a cross-sectional view schematically showing a modified example in which the cross-sectional shape of the drain groove forming plate is different.

First, in FIGS. 1 and 2, the upper surface of a floor F made of concrete, that is, a floor surface f of a kitchen K,
A drain G is recessed along the center line at the center of the floor,
The upper end opening Go of the drain groove G is covered with a lid T that can be opened and closed. The upstream end side (the left end side in FIG. 1) of the drainage groove G is closed by an end wall plate w, and the downstream end side thereof is provided in a water collecting basin B with a lid for collecting wastewater flowing down the groove G. It is open. The floor surface f is formed on a gentle downward slope that inwardly goes inward from the four sides of the kitchen K toward the drain gutter G that directly opens there, and the drain water that has fallen on the floor surface f is discharged therefrom. The water flows down the drain slope G along the downward slope.

The drain groove G has a concave surface with an open upper surface and is entirely formed of a plate material P for forming a drain groove made of stainless steel plate. That is, the plate material P is embedded in a concrete floor F. , The concave surface becomes the drain groove G. Thus, the drainage groove forming plate material P is a concrete structure (floor F).
The plate material according to the first aspect of the present invention constitutes the plate member of the present invention so as to integrally and closely adhere to the structure and cover at least a part (edge) of the outer surface of the structure.

The drainage groove forming plate member P has a rectangular pipe-shaped groove body 1 having a slit-shaped groove opening 1a extending along the longitudinal direction opened over the entire length thereof, and the groove opening 1 of the groove body 1.
a and a pair of left and right guide walls 2L and 2R which are integrally formed on the left and right side edges of the first guide member 2a and stand substantially vertically, and are connected to the groove 1a by the two guide walls 2L and 2R. An extended drainage guideway 2 is formed. The drain guide path 2 is formed narrower than the groove width of the groove main body 1, and its upper end is directly opened to the floor surface f to form an opening Go of the drain groove G.

In the illustrated example, the groove main body 1 is formed in the shape of a rectangular tube having a substantially regular octagonal cross section, and gradually descends from the upstream end to the downstream end of the drain groove G as shown in FIG. It has a gradient. In the illustrated example, the slope of the groove G is set by widening the groove main body 1 up and down as it goes downstream. However, the drainage guide path 2 goes downstream without changing the cross-sectional shape and dimensions of the groove main body 1. The gradient may be set by increasing the width in the vertical direction.

The lid T covering the opening Go of the drain groove G is
In the illustrated example, a plate having a large number of punched holes 20 for smooth drainage and formed in a flat channel shape is used. Instead of such a structure, it is also possible to use a conventional grating lid. On a pair of left and right upper edges of the plate material P (ie, upper edges of the pair of left and right guide walls 2L and 2R) serving as an opening edge of the drain groove G, a pair of left and right lids that are one step lower than the upper edges thereof are placed. The steps S are integrally formed, and the left and right sides of the lid T are placed on the lid placing steps S, respectively.

The pair of left and right upper edges of the plate material P (ie, the pair of left and right guide walls 2L, 2R) which are the upper edges of the opening of the drain groove G.
A pair of left and right edging flanges 3 are integrally connected to each other at the outer edge 3 of the flange 3.
The joint end between e and floor F serves as a joint. The edging flange portion 3 extends horizontally along the longitudinal direction of the drain groove G, and is formed flush with the floor surface f of the kitchen K adjacent to the flange portion 3 and the upper surface of the lid T. Thus, the edging flange 3 corresponds to one end of the drain groove forming plate P as a plate in the invention of claim 1.

An extension flange 4 extending downward so as to be buried in a concrete floor F is integrally bent and formed on an outer edge 3e of the flange 3 for edging. Through holes h are formed at predetermined intervals in the longitudinal direction of the drain groove G. In the illustrated example, the through holes h are formed as round holes at equal pitches. However, in the present invention, the shapes and intervals of the through holes are arbitrary, that is, the through holes are cast at the time of concrete molding of the concrete structure (floor F). Any holes can be used as long as concrete can smoothly flow.

The surface of the drainage groove forming plate material P (that is, the inner surfaces of the groove main body 1 and the guide walls 2L and 2R and the upper surface of the rim flange 3) is formed as a smooth surface having a small friction coefficient and slippery. In addition, dust and the like mixed in the wastewater are less likely to adhere. Therefore, the non-slip 5 is formed integrally on the upper surface of the edging flange 3 which is a part of the walking surface.
The upper surface of the flange portion 3 is structured so as not to slip even when wet with water. In the illustrated example, the non-slip 5 is formed in a stripe pattern by alternately arranging a plurality of non-slip projections 5a and 5b having different orientations. However, in the present invention, the shape and arrangement of the non-slip projection are not particularly limited. For example, a knurl pattern as illustrated in FIG. 5 can be used.

The drainage groove forming plate material P having the above structure is composed of a plurality of elements (for example, the groove body 1 and a portion above it).
And the divided elements may be integrally connected to each other by welding or the like, or may be integrally formed without a joint by bending or the like. still,
The processing of the through hole h and the anti-slip 5 is performed by bending the plate-shaped work in an expanded state before bending the divided element or the whole.
This is performed using a press machine on the portions that are to become the extension flange portion 4 and the rimming flange portion 3.

Next, the operation of the above embodiment will be described. Kitchen K
, The liquid such as water that has fallen on the floor f flows down the inclined surface of the floor f into the drain gutter G at the center of the floor, and further flows through the groove G at the downstream end thereof. It flows toward B and is discharged outside. In this case, by forming a large number of holes 20 in the lid T covering the opening Go (the drain guide path 2) of the drain groove G, the flow of water into the drain groove G becomes extremely smooth.

Next, the procedure for constructing the drain gutter G together with the floor F will be described with reference to FIG. First, a plurality of support plates 10 are fixed to a portion below the extension flange portion 4 of the drainage groove forming plate material P at intervals in the longitudinal direction by welding or the like. That is, each of the support plates 10 is formed of a plate material bent in an L-shaped cross section, and a concave portion 10a for fitting the lower portion of the drain groove forming plate material P is formed in an upper portion thereof. The support plate 10 is fixed to a predetermined position by inserting the concave portion 10a into the lower portion of the drain groove forming plate P.

After the drainage groove forming plate material P to which the support plate 10 is fixed is placed along the drainage route under the floor,
An adjustment bundle 15 composed of bolts 13 and nuts 14 erected in advance from a fixed bundle seat 12 on the base 11 is fixedly supported while adjusting the height.

When the installation of the drainage groove forming plate P on the foundation 11 is completed as described above, concrete is then placed on the foundation 11 and flush with the upper end of the plate P (upper surface of the edging flange 3). Is formed until the floor F is formed. At this time, the floor f is finished so as to have a gentle downward slope from the outer four sides of the kitchen K toward the drain G.

In this case, a downwardly extending extension flange portion 4 is integrally bent at the outer end edge 3e of the edging flange portion 3 of the drainage groove forming plate material P, and the extension flange portion 4 has a plurality of through holes h. Are formed at intervals from each other, so that each through hole h
Through this, the poured concrete can flow smoothly into the space inside the extension flange portion 4. And since concrete turns to every corner of the said inner space, the joint strength of concrete and the upper end edge part (guide wall 2L, 2R, flange 3 for edging etc.) of board P can be raised effectively, The familiarity of the joint surface at the connection end (joint) of the two becomes very good.

As a result, even if a large load is frequently applied to the rimming flange 3 from a moving body or a pedestrian on the floor f after the completion of the construction, the joint surface can be effectively prevented from peeling off. The problem that drainage infiltrates between the joining surfaces and oxidizes the concrete, or germs proliferate and become unsanitary can be avoided beforehand. Moreover, as described above, the cast concrete is successfully turned to all corners of the inner space of the extension flange portion 4, so that there is no possibility that a gap remains immediately below the rimming flange portion 3, and the presence of the gap causes the gap. Inconveniences, that is, a decrease in the strength of the opening edge of the drain groove G and generation of abnormal noise during walking can be avoided beforehand.

The cross-sectional shape of the drainage groove forming plate P with a lid according to the first embodiment described above is not limited to the illustrated example, and various modifications are possible. For example, the cross-sectional shape of the groove main body 1 can be formed into various cross-sectional shapes as shown in FIGS. Further, as shown in FIG. 6 (g), the drainage guide path 2 having a width smaller than that of the groove main body 1 may be eliminated, and the cross section may have a wide opening Go.

Next, referring to FIGS. 7 to 9, the second embodiment of the present invention will be described.
An embodiment will be described. Since the opening Go of the drain groove G formed by the drain groove forming plate material P of the second embodiment has no cover, and the opening Go is always kept open, the opening Go (the drain guide path) is not used. 2) It is possible to effectively avoid accumulation or clogging of dust and the like.

In this embodiment, the drainage groove forming plate material P
Is formed integrally with a rectangular pipe-shaped groove main body 1 having an elongated slit-like groove opening 1a extending along the longitudinal direction formed on the upper surface over the entire length, and on the left and right side edges of the groove opening 1a of the groove main body 1. A pair of left and right guide walls 2 standing substantially vertically
L, 2R, and both guide walls 2L, 2R.
By R, a drainage guideway 2 extending upward from the groove 1a is formed. The drain guide path 2 is formed to be sufficiently narrower than the groove width of the groove main body 1, and the upper end thereof opens directly to the floor surface f to form a narrow opening Go of the drain groove G. I have. By making the opening Go of the drain groove G sufficiently narrow in this way, there is no fear that the foot of the pedestrian falls into the groove from the opening Go even without the lid.

[0032] The groove body 1 comprises a lower inclined surface 1s ₁ pair of right and left relatively gently inclined so as to form a V-shape to each other in the illustrated example, Yamagata the form as a pair of right and left relatively steeply inclined to each other an upper inclined surface 1s ₂ is constituted by smoothly connected, as in the first embodiment, has a gentle downward slope toward the downstream end of the drain groove G.

Although the lid mounting step as in the first embodiment is not formed at the opening edge of the drain groove G, a pair of left and right upper edges of the plate material P serving as the opening edge of the groove G are formed. That is, an edge flange 3 similar to that of the first embodiment is integrally connected to the upper edge of the pair of left and right guide walls 2L and 2R, and a downward extending flange is attached to an outer edge 3e of the flange 3. Part 4
Are integrally bent, and the structure of the flange portions 3 and 4 is the same as that of the first embodiment.
A non-slip 5 similar to that of the first embodiment is integrally formed on the upper surface, and a number of through holes h similar to that of the first embodiment are formed in the extension flange 4.

The second embodiment can also achieve the same operation and effect as the first embodiment.

The cross-sectional shape of the plate material P for forming a drainage groove without a lid according to the second embodiment described above is not limited to the illustrated example, and various modifications are possible. For example, the cross-sectional shape of the groove main body 1 can be formed into various cross-sectional shapes as shown in FIGS. Further, as shown in FIG. 10 (g), the drainage guide path 2 having a width smaller than that of the groove main body 1 may be eliminated, and the opening Go may have a wide cross-sectional shape.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various embodiments are possible within the scope of the present invention. For example, in the above-described embodiment, the drainage groove forming plate is shown as the plate,
The present invention (invention of claim 1) is a plate material that covers at least a part (for example, an edge) of an outer surface of a concrete structure, and is various kinds of building plate materials that are integrally adhered to the structure together with the concrete molding. For example, the present invention can be applied to an edge frame material, a partition material, a joint forming material, and the like. In that case,
The concrete structure is not limited to the concrete floor, but can be applied to various concrete structures inside and outside the building.

In the above embodiment, the drain gutter G is provided in the kitchen K
The present invention (claim 2,
The drain according to the third invention) may be installed on floors of various rooms, for example, bathrooms, food factories, kitchens, food service centers, etc.
Further, it may be installed on the floor of various outdoor structures.

Further, in the above embodiment, the plate material (drain groove forming plate material P) is made of a stainless steel plate in consideration of corrosion resistance. However, in the present invention, other various metal plates or synthetic resin plates are used. It can be used as (drain groove forming plate material).

[0039]

As described above, according to the first aspect of the present invention,
An extension flange portion extending from one end of the plate member toward the inside of the concrete structure at one end portion of a plate member which is integrally in contact with the structure and covers at least a part of the outer surface of the structure while forming the concrete structure; Since the plurality of through-holes are formed at intervals from each other in the extension flange portion, the cast concrete can smoothly flow through the through holes inside and outside the extension flange portion. Since the concrete turns to every corner of the inner space of the flange part, the bonding strength between the concrete and one end of the plate material can be effectively increased, and the connection surface at the connection end (joint) of both is familiar. Is very good.
As a result, even if external impact or vibration is applied to the plate after completion of construction, it is effective to prevent the separation of the above-mentioned joint surface, and drainage etc. penetrates between the joint surfaces and oxidizes concrete. Can be avoided beforehand.
In addition, since the cast concrete flows well to every corner of the inner space of the extension flange portion as described above, there is no possibility that a void remains on the back side of the plate material, and the inconvenience caused by the presence of the void, that is, the concrete structure It is possible to prevent a decrease in the strength of the body and the generation of abnormal noise.

According to the second aspect of the present invention, the drain groove forming plate material embedded in the concrete floor has a pair of upper right and left upper edges which are opening edges of the drain groove and is substantially flush with the floor surface and facing outward. The flanges for edging are integrally connected, and extended flanges extending downward so as to be buried in a concrete floor are integrally bent and formed at the outer edge of the flanged flanges. The through-holes are formed at intervals from each other, so that the poured concrete can smoothly flow through the through-holes inside and outside of the extension flange portion, and the concrete can reach every corner of the inner space of the flange portion. Since it turns, the bonding strength between the concrete and the upper edge of the plate material can be effectively increased, and the familiarity of the joint surface at the connection end (joint) between them becomes extremely good. As a result, even after a large load is frequently applied to the edging flange from a moving body or a pedestrian on the floor surface after the completion of the construction, it is effective in preventing separation of the above-mentioned joint surface, and drainage between the joint surfaces is prevented. It is possible to obviate the problem that the concrete oxidizes or germs multiply and unsanitary due to infiltration. In addition, since the cast concrete is successfully turned to every corner of the inner space of the extension flange portion as described above, there is no possibility that a gap remains immediately below the rimming flange portion, and inconvenience due to the presence of the gap, That is, it is possible to prevent a decrease in the strength of the opening edge of the groove and the generation of abnormal noise when walking.

According to the third aspect of the present invention, since the non-slip is integrally provided on the upper surface of the flange portion, the upper surface of the flange portion is wetted by the drainage flowing along the floor surface to the drain groove side. Even so, it is possible to effectively prevent the pedestrian from slipping.

[Brief description of the drawings]

FIG. 1 is a plan view of a kitchen provided with a drain according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of an essential part of the drainage groove (an enlarged sectional view along line 2-2 in FIG. 1).

FIG. 3 is a partially cutaway perspective view of a floor showing a construction state of the drain gutter.

4 is an enlarged sectional view showing an opening edge of the drain groove (FIG. 3)
4-4 line enlarged sectional view)

FIG. 5 is a perspective view of an essential part showing a modification of the non-slip in the drain groove forming plate material (an enlarged perspective view corresponding to the enlarged display unit in FIG. 3).

FIG. 6 is a cross-sectional view schematically showing a modified example in which the cross-sectional shape of the drain groove forming plate is different.

FIG. 7 shows a drain according to a second embodiment of the invention, FIG.
Corresponding main part vertical sectional view

FIG. 8 is a perspective view corresponding to FIG. 3, showing a construction state of a drain ditch according to a second embodiment.

FIG. 9 is a sectional view corresponding to FIG. 4 (an enlarged sectional view along line 9-9 in FIG. 8) showing the opening edge of the drainage groove according to the second embodiment.

FIG. 10 is a cross-sectional view schematically showing a modification in which the cross-sectional shape of the drain groove forming plate is different.

FIG. 11 is a sectional view corresponding to FIG. 4, showing a conventional example or an improvement thereof.

[Explanation of symbols]

 F · · · · · concrete floor (concrete structure) f · · · · · floor surface (outer surface) G · · · · drainage h · · · · through-hole P · · · · formation of drainage Plate material (plate material) 3 ... Flange for edging (one end of plate material) 3e ... Edge 4 ... Extended flange 5 ... Slip-proof

Claims (3)

[Claims] 1. A concrete structure (F) and a plate (P) covering at least a part of an outer surface thereof are integrally brought into close contact with the molding of the concrete structure (F), and the plate (P) In a joint structure between a plate material and a concrete structure, the outer surface of one end (3) and the outer surface (f) of the concrete structure (F) connected to the one end (3) are substantially flush with each other. The one end (3) has an edge (3e)
An extension flange portion (4) extending inward of the concrete structure (F) is integrally bent and formed, and the extension flange portion (4) is cast when the concrete structure (F) is formed. A connection structure between a plate and a concrete structure, wherein a plurality of through holes (h) through which concrete can flow are formed at intervals. 2. A drain groove forming plate (P) having a concave surface with an open top surface is embedded in a concrete floor (F), and the concave surface forms a drain groove (G) opening on the floor surface (f). A pair of upper and lower edges of the left and right sides of the plate material (P), which are formed as opening edges of the drain grooves (G), are integrally formed with an outwardly directed flange portion (3) which is substantially flush with the floor surface (f). In the structure for burying a drainage groove forming plate material in a concrete floor, the outer edge (3e) of the edging flange portion (3) faces downward so as to be buried in the concrete floor (F). A drain groove forming plate member, characterized in that an extended flange portion (4) extending in a direction is formed integrally and bent, and a plurality of through holes (h) are formed in the extended flange portion (4) at intervals. Buried structure on concrete floor. 3. The method according to claim 2, wherein a non-slip (5) is integrally provided on the upper surface of the edging flange (3). Buried structure.