JP2003268972A - Form for placing concrete - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide forms for placing concrete, which can use metal fittings for forms used in conventional wooden forms, from which concrete does not leak out, by which a concrete surface can be kept in a plane and which is recycled and made of plastics. <P>SOLUTION: The forms 30 for placing concrete have a sheathing board section 32 using one surface as a concrete placing surface 31 and side board sections 33 bent at a right angle to the reverse side of the place 31 from both side edges of the section 32 and are made of plastics. In the forms 30, the forms 30 are formed in a hollow panel, in which two boards 36 and a plurality of reinforcing ribs 37 connecting these boards 36 are molded integrally, in the section 32 and the sections 33. In the forms 30, hollow projecting strip sections 40 in which one-side side faces are formed in the same plane as the surface 31 are projected from the external surfaces 38 of the sections 33. In the forms 30, oblique ribs 43 brought into contact with the insides of corner sections 42 on the concrete placing surface 31 side are formed to the sections 40. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic concrete casting formwork, and more specifically, P-con, Form Tie (registered trademark), etc., which have been used for conventional wooden formwork made of veneer plywood or the like. The present invention relates to a recyclable plastic concrete pouring formwork capable of using the formwork fittings.

[0002]

2. Description of the Related Art Conventionally, concrete pouring formwork (hereinafter referred to as "concrete formwork" or simply "formwork")
For this reason, a wooden form is used, which is cheap, easy to be nailed and processed, and light in weight, for example. However, such a wooden formwork requires (i) nailing work for fixing the splints and connecting the formworks, resulting in poor workability. (Ii) Nailing and coating on the surface of the dam plate. The concrete peeling agent causes the mold to be easily damaged, and the service life is short (for example, about 5 times). (Iii) If the service life is exceeded, it cannot be recycled as wood and must be dismantled and incinerated. There were drawbacks such as.

As a solution to these problems, a lightweight, good workability, and recyclable plastic concrete casting formwork has been proposed. Figure 10
It is a figure showing an example of such a plastic concrete pouring formwork. This formwork 10 has a hollow dam plate part 12 on one side of which is a concrete pouring face 11, and a dam plate part 12.
Hollow side plate portion 13 bent at a right angle from both side edges of the weir plate portion 12 to the opposite side of the concrete placing surface 11, and the weir plate portion 12
And a hollow reinforcing plate portion 15 provided in parallel with the side plate portion 13 provided on the back surface 14 of the barrier plate portion 12, the side plate portion 13, and the reinforcing plate portion 15. Two
The plate 16 is a hollow panel integrally formed with a plurality of long reinforcing ribs 17 for connecting the plates 16 and 16.

The installation (building) of the mold 10 will be described below with reference to FIG. First, the plurality of molds 10 are arranged in a line so that the outer surfaces 18 of the side plate portions 13 are in contact with each other, and similarly, the plurality of molds 10 are arranged in another line so that the concrete placing surfaces 11 face each other. Formwork 1
In the insertion hole 20 formed in the weir plate portion 0 of No. 0, the P-con 21 which is a retainer for keeping the opposing mold 10 at a predetermined interval is inserted through the round bar-shaped separator 22 provided near both ends. Next, fastening metal fittings 23 called form ties (registered trademark) are attached to both ends of the separator 22 from the back surface 14 side of the mold 10 by screwing, and the P of the separator 22 is attached.
The mold 10 is held by sandwiching the barrier plate 12 between the control 21 and the plate 24 at the base end of the fastening member 23.

Further, a pair of lateral members 25 made of square pipes are arranged above and below the fastening member 23, and a washer 26 for supporting these members and a wedge 27 for stopping the washer 27 are used to side the lateral members 25. 13 and the reinforcing plate portion 15 are fixed in a state of being in contact with the side surfaces. By disposing the flat material 25, the formwork 10 is prevented from expanding outward due to the pressure of the concrete when the concrete is poured.

[0006]

However, the barrier plate portion 12 of the mold 10 has two thin plates 16 (thickness: 2 mm).
Degree) and the reinforcing ribs 17 that connect these plates together are a hollow panel, so that the P-con 21 and the fastening metal fittings 23 arranged on both sides of the dam plate portion 12 are formed.
The strength with respect to the tightening by the plate 24 was insufficient. Therefore, when the mold fittings in which the pressure is easy to concentrate are diverted to one point such as the P-con 21 and the tightening fittings 23 used for the conventional wooden molds made of veneer plywood, the mold 1
It is difficult to use these conventional metal mold fittings, and it was necessary to use a special metal fitting having a special shape. Therefore, it was practically difficult to install the plastic formwork in the form as shown in FIG. In addition, the inability to divert the conventional mold fittings has been a hindrance to the spread of plastic molds.

Further, in the plastic mold 10, the outer surface 18 of the side plate 13 which is a contact surface with the adjacent mold 10 is placed with a gap between the side plates 13 in contact with each other. Smoothness is required so that the concrete does not leak outside the formwork 10. However, since the mold 10 is a large molded product integrally molded by extrusion molding, it is difficult to completely smooth the outer surface 18 of the side plate portion 13, and the mold 10 is repeatedly used. In some cases, the side plate portion 13 may be slightly deformed.

As a mold which does not need to have a through hole for a separator formed in the barrier plate, for example, a horizontal insertion groove is provided on the outer surface of the side plate, and the outer surfaces of the side plates are overlapped with each other. A mold which allows a separator to be inserted into an insertion hole formed when the insertion groove faces each other when the insertion groove
No. 000-8607. However, also in this form, there is a possibility that the concrete that has been placed with a gap between the side plate portions leaks to the outside of the form for the same reason as the above-mentioned form 10.
Further, since it is necessary to engrave the insertion groove, it is not possible to mold the mold into a hollow shape, and it is difficult to reduce the weight. Further, since it is necessary to engrave the insertion groove over the entire side plate portion, it is troublesome to form the insertion groove.

Therefore, an object of the present invention is to use mold fittings such as P-con and Foam Tie (registered trademark), which have been used for conventional wooden molds made of veneer plywood, and are lightweight. Providing a recyclable plastic concrete pouring formwork that has good workability, high durability, concrete does not leak during pouring, and the surface of the placed concrete can be kept flat. Especially.

[0010]

[Means for Solving the Problems] That is, the concrete casting formwork of the present invention comprises a weir plate portion having one surface serving as a concrete placing surface, and a concrete placing surface of the weir plate portion from both side edges of the weir plate portion. Is a plastic concrete pouring formwork having a side plate portion bent at a right angle to the opposite side of the base plate, and the dam plate portion and the side plate portion are two long plates and a plurality of long reinforcing ribs connecting the plates. And are integrally molded hollow panels, and at least one side plate has an outer surface on which a vertically extending hollow ridge whose one side surface is flush with the concrete placing surface of the dam plate is formed. It is characterized in that the projecting ridge portion is formed with an inclined rib which is in contact with the inside of the corner portion on the concrete placing surface side and is oblique to the concrete placing surface.

Further, it is desirable that another ridge different from the ridge be provided on the outer surface of the side plate. Further, it is preferable that a cutout groove is formed in the ridge portion so as to be orthogonal to the longitudinal direction of the ridge portion. Further, it is desirable that a reinforcing plate portion that is parallel to the side plate portion is provided on the back surface of the dam plate portion on which the concrete is placed. Also,
The dam plate portion is preferably transparent or translucent.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is described in detail below.
FIG. 1 is a diagram showing an example of a plastic concrete pouring formwork of the present invention. This formwork 30 has a hollow dam plate portion 32, one surface of which serves as a concrete pouring surface 31, and the concrete pouring surface 3 of the dam plate portion 32 from both side edges of the dam plate portion 32.
1, a hollow side plate portion 33 bent at a right angle to the other side, two vertically extending hollow projecting strip portions 40 provided on both side edges of an outer surface 38 of the side plate portion 33, and a weir plate portion 32. Back side 3
4 and two hollow reinforcing plate portions 35 provided in parallel with the side plate portion 33. Here, the barrier plate portion 32, the side plate portion 33, and the reinforcing plate portion 35 are 2
It is a hollow panel integrally formed with a plurality of plates 36, 36 and a plurality of long reinforcing ribs 37 connecting the plates.

The side surface on one side of the ridge 40 on the concrete placing surface 31 side is the concrete placing surface 3 of the dam plate portion 32.
1 and the same plane, the two ridges 40, the ridge 4
Notch grooves 41 are formed in the upper and lower portions of the ridge 40 at the same position so as to be orthogonal to the longitudinal direction of 0. Further, as shown in FIG. 2, the concrete placing surface 31
On the side ridge portion 40, a long slant rib 43 that is in contact with the inside of the corner portion 42 on the concrete placing surface 31 side and is oblique to the concrete placing surface 31 is formed. Similarly, a long slanting rib 45, which contacts the inside of the corner portion 44, is also formed on the other ridge portion 40.

The inclined ribs 43 are provided on the concrete placing surface 31.
The ridge angle (pointed corner) of the corner portion 42 of the convex portion 40 on the side
To maintain. That is, when the mold frame 10 is extruded from the mold by, for example, extrusion molding and cooled, the corner portion 42 of the ridge portion 40 has no inclined rib 43 that is in contact with the inside of the corner portion 42 as shown in FIG. , The corners tend to be rounded. When the corners of the corner portion 42 are rounded, as shown in FIG. 3, when the formwork 30 is installed, the concrete placing surface 31 does not become a flat surface at the joint of the formwork 30,
The cast concrete surface becomes convex at the joints of the formwork 30. Further, the inclined ribs 43 and 45 prevent the ridge portion 40 from being deformed. That is, the formwork 30
When the ridges are installed, only the ridges 40 of the adjacent formwork 30 come into contact with each other, so that the force at the time of installation is easily concentrated on the ridges 40. Since it is fastened by the countersunk plate 24 of the fastening member 23, it is preferable to provide a rib for reinforcing the ridge 40.

The mold 30 is manufactured by integrally molding the dam plate portion 32, the side plate portion 33, the ridge portion 40 and the reinforcing plate portion 35 by, for example, extrusion molding of a plastic material. Examples of plastic materials include polypropylene, polyethylene terephthalate (PET),
Polycarbonate, polyvinyl chloride, polyethylene, A
Examples include BS resin and nylon. Of these, polypropylene is preferably used because it has excellent mechanical strength, concrete releasability, and alkali resistance (concrete resistance).

Barrier plate 32, side plate 33 and reinforcing plate 3
Dimensions such as thickness, width, and height of 5 are not particularly limited, and are set to the same level as those of a conventional wooden formwork, for example. Further, the thicknesses of the two plates 36 and the reinforcing ribs 37 and the inclined ribs 43 and 45 that form the barrier plate portion 32, the side plate portion 33, and the reinforcing plate portion 35, and the thicknesses of the inclined ribs 43 and 45 are also not particularly limited, but the mechanical strength and the weight are reduced. When considering, for example, 1-3 mm
Is appropriate.

The height of the ridge 40 is such that when the ridge 40 is overlapped with the ridge 40 of another mold 30 installed adjacent to the form 30, the cutout groove 41 faces each other. It is appropriately set according to the outer diameter of the inserted separator.
For example, when the outer diameter of the separator is a normal 8 mm, the height of the ridge 40 is 5 mm and the depth of the cutout groove 41 is 4 mm. Further, the width of the ridge portion 40 is not particularly limited as long as it is narrower than the width of the side plate portion 33.

Next, the installation (building) of the concrete pouring formwork of the present invention will be described with reference to FIGS. 4 and 5. First, the plurality of molds 30 are arranged in a line so that the projecting ridges 40 protruding from the outer surface 38 of the side plate 33 are in contact with each other, and similarly, the plurality of molds are arranged so that the concrete placing surfaces 31 face each other. Line up another 30. The notch groove 41 of the ridge 40 of the mold 30 and the ridge 40 of another mold 30
The round rod-shaped separator 22 provided with the P-shaped contact 21 is inserted into an insertion hole formed so as to face the notch groove 41 of FIG.

Next, a clip metal fitting 46 bent in a U-shaped cross section is attached to both ends of the separator 22.
The form frames 30 are connected to each other by being fitted into the side edges of two adjacent side plate portions 33 so as to project from the central hole and sandwiching the side plate portions 33. Then, the fastening metal fittings 23 are attached to both ends of the separator 22 from the back surface 34 side of the formwork 30 by screwing, and the side plate portion is provided between the P-con 21 of the separator 22 and the dish plate 24 at the base end portion of the fastening metal fitting 23. The form 30 is held so as to sandwich the width direction of 33.

Further, a pair of lateral members 25 made of square pipes are arranged above and below the fastening member 23, and a washer 26 for supporting them and a wedge 27 for stopping the washer 27 are used to attach the lateral members 25 to the side plate portion. It is fixed in a state of being in contact with the side surfaces of 33 and the reinforcing plate portion 35. By disposing the horizontal member 25, the formwork 30 is prevented from expanding outward due to the pressure of the concrete when the concrete is poured.

As another construction method, the separators 22 and P are previously formed on the formwork 30 arranged in a line.
Forming metal fittings such as the con 21 and the fastening metal fittings 23 are temporarily set, and then another plurality of mold fittings 30 are inserted so that the concrete placing surfaces 31 face each other and the other end of the separator 22 is inserted. The method of building while inserting it into the hole can be mentioned.

In the formwork 30 as described above,
Since it is a plastic concrete pouring formwork,
It has good durability and can be recycled as a plastic material after it has been used for a long time. Further, the formwork 30 is
Since it is made of plastic, it has good mold releasability for concrete and does not require a concrete release agent. Also, the formwork 30
Is made of plastic, and one side is a weir plate portion 32 that is a concrete placing surface 31, and a side plate portion that is bent from both side edges of the weir plate portion 32 to the opposite side of the concrete placing surface 31 of the weir plate portion 32 at a right angle. 33, there is no need for nailing to fix the pier, workability is good, and durability is not reduced by nailing. Such a formwork 30 has a dramatically longer life than the conventional wooden formwork.

Further, in such a formwork 30, two convex ridges 40 extending in the vertical direction are provided on the outer surface 38 of the side plate portion 33, and the two ridges 40 are provided on the two convex ridges 40. Ridge 4
Since the notch grooves 41 are formed at the same positions so as to be orthogonal to the longitudinal direction of 0, when the mold frame 30 is installed, the notch grooves 41 of the ridges 40 of the mold frame 30 and other mold frames are formed. Three
The separator 22 can be inserted into the insertion hole formed so as to face the notch groove 41 of the ridge 40 of 0. In addition, such a mold 30 is used for the P controller 2 of the separator 22.
Since the tightening pressure by 1 and the plate 24 at the base end of the tightening metal fitting 23 is received in the width direction of the side plate part 33, sufficient strength can be exerted against the pressure. Therefore, the mold 30 is damaged even when the mold fittings in which the pressure is easily concentrated are diverted to one point such as the P-con 21 and the tightening fitting 23 that are used for the conventional wooden mold made of veneer plywood or the like. There is no such thing.

Further, in this formwork 10, the convex ribs 40 on the concrete placing surface 31 side are provided with the inclined ribs 43. Therefore, when the formwork 10 is molded, the corner portions 4 of the projecting ribs 40 are formed.
Since the corner portion 42 is maintained at the ridge angle without rounding 2, the concave portion (joint) is not formed at the joint of the formwork 30 when the formwork 30 is installed, and the cast concrete surface is kept flat. be able to. Further, in this formwork 30, since the convex ribs 40 are provided with the inclined ribs 43 and 45,
When the mold 30 is installed, the force is concentrated on the ridge 40,
The ridge portion 40 is the plate plate 24 of the P-con 21 and the tightening fitting 23.
Even if it is tightened by, the ridge 40 does not deform. In addition, as shown in FIG.
A stopper 28 that determines the position of the controller 21 may be formed. When the separator 22 having such a stopper 28 is inserted into an insertion hole formed by the notched grooves 41 of the ridge 40 facing each other, the stopper 28 contacts the inclined rib 43 of the ridge 40. Therefore, when the fastening metal fitting 23 is attached to the end of the separator 22 by screwing, the idle rotation of the separator 22 can be prevented.

Further, in this mold 30, the contact area between the ridges 40 which are the contact portions of the adjacent molds 30 is smaller than that of the conventional mold in which the side plate portions of the adjacent molds are in full contact with each other. Therefore, a gap is unlikely to be formed in the contact portion between the protrusions 40, and the concrete is unlikely to leak. Further, in this formwork 30, the length of the cutout groove 41 to be engraved is shorter than that of a conventional formwork in which an insertion groove needs to be engraved over the entire side plate portion, so that the cutout groove 41 can be formed. It's easy.

Further, in the formwork 30, the side plate portion 3
On the outer surface 38 of No. 3, two ridges 4 extending vertically are provided.
Since 0 is projected, the side plate 33 and the ridge 40 between the adjacent molds 30, 30 when the mold 30 is installed.
A space 50 surrounded by is formed. This space 50 can play a role of accumulating concrete that leaks out from the contact portion between the adjacent ridges 40 on the concrete placing surface 31 side, and the concrete does not leak out from the mold 30 to the outside. In addition, this formwork 30 has two ridges 4
Of the 0, one side surface of one ridge portion 40 is the weir plate portion 32.
Since it is on the same plane as the concrete placing surface 31 of, the concrete surface placed after the formwork is installed is the formwork 3
The surface of the concrete can be kept flat without any unevenness at the 0 joint.

Further, since the formwork 30 is provided with the reinforcing plate portion 35 parallel to the side plate portion 33 on the back surface 34 of the concrete placing surface 31 of the dam plate portion 32, the durability and pressure resistance are further improved. Has improved. Further, this formwork 30 is used for the dam plate 3
2, the side plate portion 33 and the reinforcing plate portion 35 are hollow and integrally formed with two plates 36 and a plurality of long reinforcing ribs 37 connecting them, and thus are lightweight and sufficient. It has excellent mechanical strength.

The plastic concrete casting formwork of the present invention is not limited to that shown in FIG. 1. For example, when the width of the dam plate portion 32 is narrow, as shown in FIG. It is also possible to omit the reinforcing plate portion. Further, the plastic concrete pouring formwork of the present invention is, as described above, made by extrusion molding of a plastic material or the like, the dam plate portion 32, the side plate portion 33, the ridge portion 40 and the reinforcing plate portion 35.
It is not limited to the one integrally molded with, for example, the dam plate portion 3
2, a side plate portion 33 and a reinforcing plate portion 35 are integrally molded to produce a form body, and a long tubular member with inclined ribs is heated on both side edges of the outer surface 38 of the side plate portion 33 by heat fusion or an adhesive. Alternatively, the convex streak portion 40 may be formed by adhering by the above. Further, it is not always necessary to previously provide the notch groove 41 in the ridge portion 40. The notch groove 41 may be engraved on site after the position where the separator 22 is inserted is determined on the site of concrete pouring.

The ridges need only be provided on the outer surface of at least one of the side plate portions, and do not necessarily have to be provided on the outer surface of the side plate portions on both sides. Further, the position of the ridge portion is not limited to the position shown in the figure, and one of the two ridge portions extending in the vertical direction has a side surface on one side of which is a concrete placing surface of the dam plate portion. If the same plane as
The other protruding portion may not be provided on the side edge of the side plate portion as in the illustrated example. Further, the number of the ridges is not limited to two as in the illustrated example, and may be one as shown in FIG. 7 or three or more. However, as mentioned above, if there are at least two ridges,
Since the concrete leaking out can be stored in the space surrounded by the side plate portion and the ridge, it is preferable that the ridge has a plurality of ridges. Further, the inclined ribs of the ridges may be provided at least on the ridges 40 on the concrete placing surface 31 side in contact with the inside of the corners 42 on the concrete placing surface 31 side. It is not always necessary to provide inclined ribs on the ridge.

If the dam plate is transparent or semi-transparent, light is transmitted through the mold, so that external light can be introduced into the concrete pouring site surrounded by the mold. Further, the separator used when the mold 30 is installed is not limited to the round bar shape shown in the drawing, and a known separator such as a flat plate shape can be used. Further, the installation positions of the clip metal fittings 46 used when installing the mold 30 are not limited to the positions of both ends of the separator 22 as shown in the drawing, and adjacent two
Any position may be used as long as it can hold the side edges of the one side plate portion 33. Further, the shape of the clip metal fitting is not limited to the shape of the clip metal fitting 46 in the illustrated example. For example, in FIG.
A clip metal fitting 51 having an eaves portion 49 bent from the side edge of the central portion of the metal fitting body 47 to the side opposite to the bent portion 48 of the metal fitting body 47 as shown in FIG.

Since the clip metal fitting 51 has the eaves portion 49 with which the flat members 25 arranged above and below come into contact,
The flat member 25 does not hit the dish plate 24 of the fastening member 23. As a result, between the flat member 25 and the side plate portion 33,
Since a gap corresponding to the thickness of the plate 24 does not occur, the formwork 30 can be accurately fixed by the horizontal member 25, and the formwork 30 is exposed to the outside by the pressure of concrete during concrete pouring. It does not swell. Further, since the notch 52 is formed at the center of the eaves portion 49, the separator 2 protruding from the hole at the center of the metal fitting body 47.
It is easy to visually confirm the end of 2. Accordingly, when the fastening metal fitting 23 is screwed onto the end portion of the separator 22, the eaves portion 49 does not obstruct and the work is not difficult.

[0032]

As described above, the concrete pouring formwork of the present invention has a dam plate portion having one surface serving as the concrete pouring surface, and the concrete pouring surface of the dam plate portion from both side edges of the dam plate portion. Is a plastic concrete pouring formwork having a side plate portion that is bent at a right angle on the opposite side, and the dam plate portion and the side plate portion are two plates and a plurality of long reinforcing ribs connecting the plates. And are hollow panels integrally molded,
On the outer surface of at least one of the side plates, a hollow projecting ridge extending in the vertical direction whose one side surface is flush with the concrete placing surface of the dam plate is projected. Since a slanting rib is formed which is in contact with the inside of the corner portion on the installation surface side and is oblique to the concrete installation surface, the P-con, foam, which has been used for the conventional wooden form made of veneer plywood or the like. It is possible to use mold fittings such as Thailand (registered trademark), it is lightweight, has good workability, has high durability, concrete does not leak easily when placing, and the placed concrete surface is kept flat. And can be recycled.

If another ridge different from the ridge is provided on the outer surface of the side plate, concrete leaking into the space surrounded by the ridge and the side plate can be collected. The concrete does not leak outside the formwork. In addition, if the notched groove is formed in the protruding portion so as to be orthogonal to the longitudinal direction of the protruding portion, the separator is formed in the insertion hole formed by the notched grooves facing each other when the mold is installed. Can be inserted. Further, if a hollow reinforcing plate portion parallel to the side plate portion is provided on the back surface of the concrete placing surface of the dam plate portion, durability and pressure resistance can be further improved. Further, if the dam plate portion is transparent or translucent, it is possible to introduce light from the outside into the concrete pouring site surrounded by the formwork.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a concrete pouring formwork of the present invention.

2 is a top view showing a side plate portion of the concrete pouring formwork of FIG. 1. FIG.

FIG. 3 is a top view showing a side plate portion in the case where an inclined rib is not provided on a protruding portion.

FIG. 4 is a perspective view showing an example of the installation form of the concrete pouring formwork of the present invention.

FIG. 5 is a perspective view of an essential part showing an example of a state in which molds are connected.

FIG. 6 is a top view showing another example of the separator.

FIG. 7 is a perspective view showing another example of the concrete pouring formwork of the present invention.

FIG. 8 is a perspective view showing another example of the concrete pouring formwork of the present invention.

FIG. 9 is a perspective view of a main part showing another example of a state in which molds are connected to each other.

FIG. 10 is a perspective view showing an example of a conventional concrete pouring formwork.

FIG. 11 is a perspective view showing an example of an installation form of a conventional concrete casting formwork.

[Explanation of symbols]

30 formwork (formwork for concrete pouring) 31 Concrete placing surface 32 dam plate 33 Side plate 34 Back side 35 Reinforcing plate 36 plates 37 Reinforcing rib 38 outer surface 40 ridge 41 Notch groove 42 Corner 43 Inclined rib

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Michihiro Miyakoshi             Fukui, Fukui Prefecture             Within Bi Kagaku Kogyo Co., Ltd. (72) Inventor Souichi Takagi             Fukubi, 1-23-3 Oi, Shinagawa-ku, Tokyo             Bill Fukubi Chemical Industry Co., Ltd. (72) Inventor Toshihiko Hosono             Fukubi, 1-23-3 Oi, Shinagawa-ku, Tokyo             Bill Fukubi Chemical Industry Co., Ltd.

Claims (5)

[Claims] 1. A plastic concrete having a dam plate portion, one surface of which is a concrete casting surface, and a side plate portion which is bent at a right angle from both side edges of the dam plate portion to the side opposite to the concrete casting surface of the dam plate portion. It is a casting formwork, and the dam plate part and the side plate part are hollow panels integrally formed with two plates and a plurality of long reinforcing ribs connecting the plates, and at least one side plate part. On the outer surface of the, a convex ridge extending in the vertical direction is projected, one side of which is flush with the concrete placing surface of the weir plate, and the ridge has a corner on the concrete placing surface side. A formwork for concrete pouring, characterized in that an inclined rib that is in contact with the inside of the concrete and is oblique to the concrete pouring surface is formed. 2. The concrete pouring formwork according to claim 1, wherein another ridge different from the ridge is provided on the outer surface of the side plate. 3. The concrete pouring mold according to claim 1, wherein a cutout groove is formed in the convex ridge portion so as to be orthogonal to a longitudinal direction of the convex ridge portion. frame. 4. The back surface of the concrete placing surface of the dam plate,
The concrete pouring formwork according to any one of claims 1 to 3, wherein a parallel reinforcing plate portion is provided on the side plate portion. 5. The concrete pouring formwork according to claim 1, wherein the dam plate portion is transparent or translucent.