JP3138143U - Concrete formwork dam and lid with concrete formwork dam - Google Patents

Abstract

The present invention provides a concrete formwork dam plate having high strength and easy installation work, and a concrete form dam plate with a lid that can prevent the intrusion of concrete from an end face and is easy to manufacture.
SOLUTION: Two parallel flat plate portions 2a, 2b and rib portions provided between the flat plate portions 2a, 2b are provided, and the flat plate portions 2a, 2b and the rib portions are integrally formed of a synthetic resin. The concrete form dam plate 1 includes a plurality of first rib portions 3 each of which has a plurality of first hollow portions 5a and 5b each having a substantially rectangular parallelepiped shape. The rib portions are suspended from the flat plate portions 2a and 2b. And a plurality of second rib portions 4a, 4b that are obliquely provided between the plurality of first rib portions 3 and form a plurality of substantially triangular prism-shaped second cavities 6a, 6b, 6c, 6d. is there.
[Selection] Figure 1

Description

  The present invention is for a concrete formwork dam plate for solidifying concrete into a predetermined shape when placing concrete, and for a concrete formwork with a lid that prevents intrusion of concrete into the concrete formwork dam plate during concrete placement. Concerning the weir plate.

  In recent years, dam plates for concrete formwork are becoming mainstream from those using conventional plywood by extrusion molding from the viewpoint of workability and durability. In particular, a structure has been considered in which the inside of the plate-like body is hollow for weight reduction, while ribs are provided in the hollow portion to reinforce the strength. However, when the inside of the plate-like body is hollow, there is a problem that the concrete enters the inside from the end face of the plate-like body or deforms due to the pressure of the concrete due to insufficient strength of the plate-like body. Therefore, in order to prevent the intrusion of concrete from the end face, a cap for covering the end face of the plate-like body, a rib structure for improving the strength of the plate-like body, and the like are considered.

For example, in Patent Document 1, the name of “cap for hollow form panel and hollow form panel with cap” prevents concrete from entering the inside of the hollow form panel, and vertically extends to the back of the hollow form panel. An invention related to a cap for a hollow form panel and a hollow form panel with a cap capable of arranging a flap material is disclosed.
In the invention disclosed in Patent Document 1, a hollow form panel cap includes a hollow dam plate portion in which one surface serves as a concrete placing surface, and a plurality of caps provided on the other surface of the dam plate portion. It can be installed in a hollow form panel having a hollow pier part, and a sealing part that seals the opening end face of the hollow form panel, and is disposed on the other side of the hollow form panel other than this sealing part It is a substantially flat thing which has a notch part which can insert the vertical roof material inserted.
Therefore, when the hollow form panel cap is installed on the end face of the hollow form panel, it is possible to prevent the intrusion of concrete from the end face of the hollow form panel. In addition, the hollow form panel cap can be provided with an abutment rib that prevents lateral displacement and a fitting convex part that fits into the hollow part of the crosspiece. By installing this, the hollow form panel can be installed. The attachment to the end face of the is more reliable. Usually, in the installation of the formwork panel, a vertical strip is installed on the back surface of the formwork panel in order to prevent the displacement due to the pressure of the concrete. Since the notch is provided at the place, the hollow form panel can be built by inserting the vertical sheet into the notch while preventing the concrete from entering the hollow form panel.

Patent Document 2 discloses an invention relating to a concrete casting diversion form having good workability and sufficient strength under the name of “concrete casting diversion form”.
The invention disclosed in Patent Document 2 includes two plates that are parallel to each other and extend in the longitudinal direction to form a panel portion, and a first rib that is obliquely provided between the two plates of the panel portion and extends in the longitudinal direction. The two plates of the pier part are formed in a longitudinal direction in a longitudinal direction between the two plates standing on one surface of the panel part and extending in the longitudinal direction to form the pier part, and the two plates of the pier part so as to be continuous with the first rib. A second rib extending is provided.
And since the panel part and the pier part are integrally formed by extrusion molding using a synthetic resin such as polyvinyl chloride, polypropylene, polycarbonate, etc., the panel part and the pier part in the conventional formwork are joined by nailing. This eliminates the need for work, improves the workability, and prevents damage to the mold due to nailing. Further, the mold can obtain strength in the vertical direction and the horizontal direction by the inclined first rib of the panel portion. Further, since the first rib of the panel portion and the second rib of the crosspiece portion are continuously formed, even if a plurality of molds are connected using the crosspiece portion, the first rib of the panel portion is the first rib of the crosspiece portion. Two ribs are reinforced to prevent deformation of the pier.

Patent Document 3 discloses an invention relating to a concrete casting mold made of plastic that is excellent in strength, workability, and durability and is recyclable under the name of “concrete casting mold”.
The invention disclosed in Patent Document 3 includes a dam plate portion in which one surface is a concrete placement surface and includes two plates and a reinforcing rib provided between the two plates, and the other dam plate portion. A side plate part provided with two plates and reinforcing ribs provided between the two plates, which are suspended from both ends of the surface, and two plates installed on the other side of the weir plate part in parallel to the side plate part And a reinforcing plate portion provided between the two plates and a reinforcing rib.
The reinforcing rib of the dam plate portion is a right-angled rib formed at a right angle to the concrete placing surface at the portion in contact with the side plate portion and the reinforcing plate portion, and is continuous with the reinforcing ribs of the side plate portion and the reinforcing plate portion. The other parts are inclined ribs that are continuously inclined with respect to the concrete pouring surface, so that they have sufficient strength without being deformed by the pressure of the concrete during concrete pouring. is doing. In addition, since the concrete casting mold is a hollow panel in which a dam plate, a side plate, a reinforcing plate, and a reinforcing rib are integrally formed by extrusion molding of a plastic material such as polypropylene, a conventional plywood mold As described above, it is not necessary to nail a pier, and workability is good, and since it does not swell due to water absorption, it is durable, can be diverted, and finally can be recycled as a plastic material.
JP 2006-207219 A JP-A-7-207930 JP 2003-301605 A

  However, in the conventional technique described in Patent Document 1, it is possible to prevent the intrusion of concrete from the end face by securely fitting the cap for the hollow form panel to the end face of the hollow form panel. The cap for the formwork panel is strictly formed to have a shape that matches the end face of the hollow formwork panel, and the manufacturing of this cap for the hollow formwork panel requires high precision, so high manufacturing technology is required. There was a problem of being said.

  Moreover, in the prior art described in patent document 2 and patent document 3, the rib of the board surface used as the main surface is provided so that it may become diagonal, and the intensity | strength of a weir board is ensured, but at the time of concrete placement In installing the weir plate, nailing or screwing with screws is necessary to fix the weir plate, and the tip of the nail or screw is in contact with the slanted rib and is slippery, making it difficult to install was there.

  The present invention has been made in response to such conventional circumstances, and is a concrete mold with a lid that is easy to manufacture and can prevent the intrusion of concrete from the end face with a high strength and easy-to-install concrete formwork dam plate. It aims at providing the dam for a frame.

In order to achieve the above object, a concrete form dam plate according to claim 1 is provided with two parallel flat plate portions and a rib portion provided between the flat plate portions, the flat plate portion and the ribs. A concrete formwork dam plate, the portion of which is integrally formed of a synthetic resin, wherein the rib portion is suspended from the flat plate portion to form a plurality of first cuboid-shaped first cavities. It has a rib part and a plurality of second rib parts obliquely provided between the plurality of first rib parts to form a plurality of substantially triangular prism-shaped second cavities.
In the concrete formwork dam plate having the above-described configuration, the rib portion provided between the two parallel flat plate portions acts to provide a cavity while connecting the flat plate portions, and is substantially omitted by the first rib portion. The rectangular parallelepiped first cavity portion acts to completely make a space between the flat plates. Further, the second rib portion forms a substantially triangular prism-shaped second cavity portion and has an effect of connecting the flat plates obliquely. And since a flat plate part and a rib part are integrally comprised with the synthetic resin, it acts so that workability may be improved.

A concrete formwork dam according to claim 2 is a concrete formwork dam according to claim 1, wherein the rib is provided on the outer surface of the flat plate part where the first cavity is located. , A mark portion is formed.
In the concrete formwork dam with the above configuration, in addition to the effect of the device according to claim 1, the mark portion acts to clearly indicate the position of the first cavity portion of the rib portion on the outer surface of the flat plate portion. .

A concrete formwork dam according to claim 3 is the concrete formwork dam according to claim 1 or 2, wherein the synthetic resin includes polypropylene, talc, and calcium carbonate. .
In the concrete form dam with the above structure, in addition to the function of the device according to claim 1 or 2, polypropylene forms a synthetic resin excellent in mechanical strength and alkali resistance, and talc is impact. The calcium carbonate acts to reinforce the bending strength.

Furthermore, a concrete formwork dam plate with a lid according to claim 4 is a concrete formwork in addition to the concrete formwork dam plate according to any one of claims 1 to 3. The cover includes a flat cover that can cover the end face of the weir plate, and a plurality of protrusions that protrude from the cover and can be removably fitted into the first cavity.
In the concrete formwork dam with the above configuration, in addition to the action of the device according to any one of claims 1 to 3, the covering part acts so as to cover the end face of the concrete formwork dam. The protrusion acts to detachably fit into the first cavity, and the lid acts to prevent the intrusion of concrete into the concrete formwork weir plate.

Finally, a concrete formwork dam plate according to claim 5 is the concrete formwork dam plate with lid according to claim 4, wherein the protrusion is a thin piece having a substantially square shape on the front surface, It is arranged upright and arranged obliquely with respect to the longitudinal direction of the cover portion.
In the concrete form dam with the above structure, in addition to the function of the invention according to claim 4, the projecting portion is disposed upright obliquely with respect to the longitudinal direction of the flat cover portion, In the first cavity of the formwork weir plate, it acts so as to be fitted obliquely with respect to the longitudinal direction.

  In the concrete formwork dam plate according to claim 1 of the present invention, since the flat plate portion and the rib portion are integrally formed by extrusion molding using a synthetic resin, the construction becomes extremely easy and a cavity is formed by the rib portion. Therefore, the weight can be reduced and the strength can be increased. The first rib portion suspended between the flat plates connects the flat plates to impart strength to the concrete formwork weir plate, and the substantially rectangular parallelepiped first hollow portion by the first rib portion is Since the space between the flat plates is completely hollow, nailing and screwing can be easily performed when the concrete formwork weir plate is fixed to the foundation or the base. And the 2nd rib part diagonally provided between the 1st rib parts can further reinforce the intensity | strength of the dam board for concrete forms by connecting between flat plates diagonally.

  Further, in the concrete formwork dam plate according to claim 2 of the present invention, the position of the first cavity portion of the rib portion is clearly indicated on the outer surface of the flat plate portion by the mark portion. When fixing to the foundation or the like, nailing or screwing into the first cavity can be easily and reliably performed.

  Further, in the concrete form dam plate according to claim 3 of the present invention, since polypropylene is excellent in mechanical strength, a high strength concrete form dam plate can be obtained. Moreover, it is resistant to alkalinity, and durability can be obtained without deterioration even when it comes into contact with alkaline concrete. Furthermore, the releasability from the concrete is good, and peeling from the concrete after solidification is easy. In addition, by including talc and calcium carbonate, the impact strength is reinforced by talc and the bending strength is reinforced by calcium carbonate in the concrete form dam plate.

  And in the concrete mold dam with a lid according to claim 4 of the present invention, since it has a lid provided with a protrusion that can be fitted into the first cavity of the concrete mold dam, The concrete can be prevented from entering the cavity of the concrete formwork dam plate, and the concrete formwork dam plate can be reused. Moreover, since there is no adhesion of concrete, final disposal is easy.

  Finally, in the concrete form dam plate with a lid according to claim 5 of the present invention, since the protrusion is arranged obliquely with respect to the longitudinal direction of the flat cover portion, The degree of accuracy required is low and manufacturing is easy. In addition, since the first hollow portion of the concrete formwork dam plate is fitted obliquely with respect to the longitudinal direction, it is less likely to be displaced after the fitting, and the end face of the concrete formwork dam plate and the lid are in good contact with each other. Infiltration can be completely prevented.

Below, the best embodiment of the weir board for concrete forms which concerns on this invention is described based on FIG.1 and FIG.2. (In particular, it corresponds to claims 1 to 3.)
FIG. 1 (a) is a front view of a concrete formwork weir according to the preferred embodiment of the present invention, and FIG. 1 (b) is a conceptual view showing an end face in the width direction of the concrete formwork weir. (C) is an enlarged view of a portion surrounded by a symbol A in FIG. 1 (b).
In FIG. 1A, a concrete formwork dam plate 1 is a vertically long rectangular plate having a width of about 600 cm and a length of about 1800 cm to 2700 cm, and connects two flat plates to each other. It is made up of ribs.
In FIG. 1 (b), when looking at the end face in the width direction, the concrete form dam plate 1 has two flat plates 2a and 2b arranged in parallel, and in the longitudinal direction between these flat plates 2a and 2b. A plurality of extending ribs are provided. The rib includes a vertical rib 3 that is suspended between the flat plates 2a and 2b and two inclined ribs 4a and 4b that are inclined, and both sides of the flat plates 2a and 2b are closed by the vertical ribs 3a and 3b. ing.
FIG. 1C shows an enlarged view of the end face in the width direction. A plurality of the vertical ribs 3 are arranged at equal intervals to connect the flat plates 2a and 2b, and extend in the longitudinal direction in a substantially rectangular parallelepiped shape. First cavities 5a and 5b are formed. On the other hand, the inclined rib 4a is disposed obliquely between the two vertical ribs 3 and 3 so as to form a brace that rises to the right, and the first cavity is divided into a substantially triangular prism shape to divide the second cavity 6a and 6b. In addition, the inclined rib 4b is disposed obliquely between the two vertical ribs 3 and 3 so as to form a right-down strut, and similarly, the first cavity is divided into two substantially triangular columns. Two cavities 6c and 6d are formed. The inclined ribs 4a and the inclined ribs 4b are alternately arranged, and the first cavity 5a or the first cavity 5b is interposed between the inclined rib 4a and the inclined rib 4b. Yes.

In the concrete formwork dam plate 1, the vertical ribs 3 and the inclined ribs 4a, 4b are provided on the flat plates 2a, 2b to form the first cavities 5a, 5b and the second cavities 6a, 6b, 6c, 6d. The weight can be reduced while maintaining a desired thickness. In particular, by providing the inclined ribs 4a and 4b, the cross section is formed in a triangular shape to improve the strength from the surface direction of the concrete form dam plate 1, that is, the direction perpendicular to the flat plates 2a and 2b. Can do.
Since the first cavities 5a and 5b completely make the space between the flat plates 2a and 2b, when fixing the concrete formwork dam plate 1 to the foundation or the foundation at the time of installation, it is screwed with nails or screws. Since there is no obstruction when it is performed on the first cavities 5a and 5b, it can be performed easily. Although not shown, if the place where the first cavities 5a and 5b are located is clearly marked on the outer surface side of the flat plates 2a and 2b, the position where nailing and screwing are easily performed from the outside. Since it can be confirmed, the installation work can be performed efficiently. The mark is not particularly limited, and may be any shape as long as it is visible, such as a round shape, a triangle shape, a square shape, a line, or a point.
Moreover, in FIG.1 (b) and (c), the 1st cavity 5b has the flat plate 2a, 2b part formed thickly compared with the 1st cavity 5a. Accordingly, when nailing or screwing into the first cavity 5b, the flat plates 2a and 2b are thick, so that damage to the flat plates 2a and 2b due to impact of hitting can be suppressed. .
The arrangement of the first cavities 5a, 5b and the second cavities 6a, 6b, 6c, 6d is not particularly limited, and the inclined ribs 4a, 4b may be installed, and the first cavities 5a and 5b may be arranged in a well-balanced manner so as to facilitate fixing by nailing or the like.

  The concrete form dam plate 1 is produced by extrusion molding using synthetic resin as a main raw material. Accordingly, in the concrete formwork dam plate 1, the flat plates 2a and 2b, the vertical ribs 3, 3a and 3b, and the inclined ribs 4a and 4b are integrally formed. The inclined ribs 4a and 4b do not peel off, have strength, and are easy to manufacture. In addition, polypropylene, polycarbonate, polyethylene terephthalate, polyvinyl chloride, polyethylene, ABS resin, nylon, etc. can be used as the synthetic resin, but considering the strength of the concrete and the resistance to concrete exhibiting alkalinity and releasability with concrete. Polypropylene is suitable. Furthermore, it is possible to add calcium carbonate and talc, and it is possible to obtain a concrete form weir plate 1 in which bending strength is reinforced by calcium carbonate and impact strength is reinforced by talc. Table 1 shows blending examples of polypropylene, calcium carbonate and talc.

Next, the installation of the concrete formwork weir plate will be described with reference to FIG.
FIG. 2 is a conceptual diagram illustrating an installation example using the concrete formwork weir plate according to the present embodiment.
In FIG. 2, reference numeral 1 denotes a cross section of a plurality of concrete formwork dams, and the plurality of concrete formwork dams 1 are arranged in the shape of a desired concrete 14. It is fixed by nailing. The nail 8 to be nailed is driven into the first cavity 5b of the concrete formwork dam plate 1, and since the first cavity 5b is a substantially rectangular parallelepiped cavity, the tip of the nail 8 does not slip. Easy to type. Further, as described above, since the flat plate of the first cavity 5b is formed thick, it has sufficient strength to withstand the impact of nailing, and the concrete formwork weir plate 1 is damaged. It is difficult to do. The nail 8 does not necessarily have to be driven into the first cavity 5b, and can be driven into the first cavity 5a. The first cavity 5a is a substantially rectangular parallelepiped-like cavity like the first cavity 5b. Therefore, nailing is facilitated, and more first cavities 5a are provided than first cavities 5b, so that a margin can be obtained in the position of driving into the pier 7.
A separator 9 is installed on the concrete formwork dam plate 1 arranged so as to be opposed to the separator 9, and the separator 9 includes a wooden container 11 on the concrete placement surface of the concrete formwork dam plate 1. It is fixed by the home tie 10 on the side that is not the placing surface. In addition, the code | symbol 12 is a reinforcement part and the code | symbol 13 is a vertical round steel pipe. Reference numeral 21 denotes a horizontal round steel pipe 21, and the round tube fixing washer 22 presses the horizontal round steel pipe 21 and the vertical round steel pipe 13 formed so as to be orthogonal thereto against the side surface of the concrete formwork weir plate 1. It is a jig for fixing. The reinforcing portion 12 is provided to reinforce the concrete formwork dam plate 1 at the portion of the first cavity 5b of the concrete formwork dam plate 1, and the vertical round steel pipe 13, the horizontal round steel pipe 21, and the round pipe The stopper washer 22 is installed as a reinforcement for resisting the pressure of the concrete when the concrete is placed. By installing the reinforcing portion 12 and the vertical round steel pipe 13, the separator 9 can be repeatedly inserted between the concrete formwork dams 1 and the life of the concrete formwork dams 1 can be extended and reused. Become. Further, although not installed in the present embodiment, a reinforcing material such as a vertical member or a horizontal member may be provided.

In the present embodiment configured as described above, the first cavity that facilitates nailing and the like in a complete cavity by appropriately arranging vertical ribs and inclined ribs in the ribs provided between the two flat plates. In addition, the cross section is formed in a triangular shape by the inclined ribs, thereby making it possible to improve the strength of the concrete formwork weir plate. In addition, the concrete form slats are formed by extrusion using a synthetic resin mainly composed of polypropylene, so that they are lightweight, high in strength and easy to manufacture. By adding calcium, it is possible to manufacture a strong concrete formwork dam that is resistant to impact and bending.

Next, the best embodiment of the concrete formwork weir plate with a lid according to the present invention will be described with reference to FIG. (In particular, it corresponds to claims 4 and 5.)
Fig.3 (a) is a conceptual diagram which shows the end surface of the concrete formwork dam of the concrete formwork dam with a lid concerning the best embodiment of this invention, (b) is also a concrete type with a lid It is a top view of the lid | cover of a frame dam plate, (c) is a side view of the lid | cover of the concrete mold dam plate with a lid | cover similarly, (d) was enclosed by the code | symbol B in FIG.3 (b). It is an enlarged view of a part, and (e) is a key map of a projection of a lid of a concrete formwork dam plate with a lid similarly.
In FIG. 3 (a), the concrete formwork dam plate 1 of the concrete formwork dam with a lid has the same structure as the concrete formwork dam plate described above. It comprises a flat plate 2a, 2b, vertical ribs 3 provided between these flat plates 2a, 2b, and inclined ribs 4a, 4b. The first cavities 5a, 5b and the second cavities 6a, 6b, 6c, 6d Is formed.
3 (b) and 3 (c), the lid 15 is composed of a flat cover 16 and a plurality of thin protrusions 17a and 17b protruding from the cover 16. The lid 15 can be attached to and detached from the end face in the width direction of the concrete formwork dam plate 1, and the cover 16 covers the end face, and the projections 17 a and 17 b are fitted into the first cavities 5 a and 5 b. . The first cavity 5b is smaller in the thickness direction because the flat plate portion is thicker than the first cavity 5a, and the protrusion 17b is formed to be small in accordance with the first cavity 5b.

FIG. 3D shows an enlarged view of the lid 15, and the protrusions 17 a and 17 b are erected so as to be inclined with respect to the longitudinal direction of the cover 16. Accordingly, the protrusions 17a and 17b are fitted obliquely with respect to the thickness direction of the first cavities 5a and 5b, and the fitted protrusions 17a and 17b are not easily displaced by fitting in this oblique direction. The lid 15 is brought into close contact with the end face of the concrete form dam plate 1 to effectively prevent the intrusion of concrete. Further, when the plurality of protrusions 17a and 17b are installed on the cover 16, even if the distance between the protrusions is slightly deviated, the protrusions 17a and 17b can be fitted into the first cavities 5a and 5b by being arranged obliquely. This is advantageous in terms of quality control during manufacturing.
In FIG. 3 (e), the protrusion 17a is rounded at both ends at the top, and when inserted into the first cavity 5a, the roundness comes into contact with the flat plate portion of the first cavity 5a. Even so, the protrusion 17a is easily inserted into the first cavity 5a due to the roundness. Further, since there is no sharp corner, there is an advantage that even if it contacts the end of the concrete form dam plate 1 or the like, it is difficult to be damaged.
The cover 15 is integrally formed with a cover 16 and protrusions 17a and 17b by extrusion molding using a synthetic resin such as polypropylene, like the concrete form dam plate 1.

Further, with reference to FIG. 4 and FIG. 5, a description will be added regarding a case where the concrete form weir plate with a lid according to the present embodiment is used for slab formation. FIG. 4 is a longitudinal sectional view conceptually showing a state in which a support structure is built to form a floor slab in a structure having a first floor and a second floor, and FIG. 5 is a dotted line in FIG. It is an enlarged view which expands and shows the part of the enclosed code | symbol C. FIG.
4 and 5, the floor slab 18 is supported by arranging the concrete form dam plate 1 on the lower surface and assembling the large pull 23 and the support 20 through the joist round steel pipe 19 below the floor slab 18. . The floor slab 18 is formed by placing concrete on a reinforcing bar stretched around in a grid pattern. Before placing the concrete, the concrete formwork dam plate 1 is preliminarily used with a joist round steel pipe 19 and a supporting work 20. And fix it.

On the other hand, the concrete wall 24 formed vertically also has the concrete form dam plate 1 arranged on both sides thereof, and the vertical round steel pipe 13 and the horizontal round steel pipe arranged so as to be orthogonal to the vertical round steel pipe 13 on both sides thereof. It is formed by fixing with a separator 9 via 21 and a round tube stopper washer 22 and placing concrete.
Among the concrete formwork dams 1 fixed and arranged in this way, the lower surface of the floor slab 18 and a part of the side surface of the concrete wall surface are horizontally installed so that the end surfaces are exposed in FIG. As shown in FIG. 5, first cavities 5a and 5b and second cavities 6a, 6b, 6c, and 6d are formed on the end surfaces as shown in FIG. As described above, this cavity is formed in order to reduce the weight while ensuring the desired thickness required for construction, and the concrete form weir installed horizontally in this cavity. The concrete for pouring may flow into the end face of the plate 1. In such a case, the solidified concrete cannot be deleted, and the concrete form dam plate 1 cannot be removed and reused after the slab is formed. When solidified concrete is used as it is without being removed, the weight of the concrete may have an adverse effect on the weight reduction. Therefore, a lid 15 is provided on the end face of the concrete formwork dam plate 1 to form a cavity. Covering can prevent the inflow of concrete.

In FIG. 5, the end face shape is clearly shown in order to schematically show the exposed part of the end face, but in actual construction, the end face is covered with the lid 15 as described above, so that the end face looks like FIG. 5. The shape of is never exposed.
Further, in order to form the concrete wall surface 24 formed in the vertical direction, the concrete formwork dam plate 1 arranged on both sides of the concrete formwork dam plate 1 is configured to overlap another end wall of the concrete formwork dam plate 1. In some cases, the first cavities 5a and 5b and the second cavities 6a, 6b, 6c, and 6d are formed in the vertical direction, so that it is not necessary to cover the end face with the lid 15 in the horizontal direction. Needless to say, it is desirable to cover with the lid 15 because the concrete to be placed flows with the upper end face exposed.

In the present embodiment configured as described above, since the lid for covering the end face of the concrete formwork dam plate is provided, the concrete enters the hollow portion of the concrete formwork dam plate when placing the concrete. Therefore, the reusable concrete formwork dam can be provided. In addition, since the intrusion of concrete can be prevented, floor slab construction and ceiling slab construction are possible in addition to conventional wall construction.
In addition, the fitting of the protrusion into the hollow portion is extremely simple because it does not require screwing or adhesive application, and can be quickly performed on the construction site.
And since the protrusion which fits into the hollow part of the concrete form dam plate is erected obliquely with respect to the longitudinal direction and the tolerance is obtained at the fitting position, quality control is easy and manufacture is easy. It will be a thing.

  As described above, the present invention described in claims 1 to 5 is a concrete form dam plate that is high in strength and easy to install, and a concrete with a lid that is easy to manufacture and prevents intrusion of concrete. Formwork weirs can be provided and used for concrete placement work.

(A) is a front view of the concrete formwork weir plate according to the best embodiment of the present invention, (b) is a conceptual diagram showing the end face of the concrete formwork weir plate, (c) It is an enlarged view of the part enclosed by the code | symbol A in FIG.1 (b). It is a conceptual diagram which shows the example of installation using the weir board for concrete forms which concerns on this Embodiment. (A) is a conceptual diagram which shows the end surface of the concrete formwork dam of the concrete formwork dam with a cover concerning the best embodiment of this invention, (b) is the dam for a concrete formwork with a cover similarly It is a top view of the lid | cover of a board, (c) is a side view of the lid | cover of a concrete formwork weir board with a lid | cover similarly, (d) is an expansion of the part enclosed by the code | symbol B in FIG.2 (b) It is a figure, (e) is a conceptual diagram of the protrusion of the lid | cover of the concrete dam plate with a lid | cover similarly. It is a longitudinal cross-sectional view which shows notionally the mode that the support work is assembled in order to form a floor slab in the structure provided with a 1st floor and a 2nd floor. FIG. 5 is an enlarged view showing an enlarged portion of a symbol C surrounded by a dotted line in FIG. 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Concrete formwork dam plate 2a, 2b ... Flat plate 3, 3a, 3b ... Vertical rib 4a, 4b ... Inclined rib 5a, 5b ... 1st cavity 6a, 6b, 6c, 6d ... 2nd cavity 7 ... Pier 8 ... Nail 9 ... Separator 10 ... Home tie 11 ... Wood cone 12 ... Reinforcement part 13 ... Vertical round steel pipe 14 ... Concrete 15 ... Lid 16 ... Cover 17a, 17b ... Protrusion 18 ... Floor slab 19 ... Neita round steel pipe 20 ... Support 21 ... Horizontal round steel pipe 22 ... Round pipe clamp washer 23 ... Large pull 24 ... Concrete wall

Claims (5)

  A concrete formwork weir plate comprising two parallel flat plate portions and rib portions provided between these flat plate portions, wherein the flat plate portions and the rib portions are integrally formed of synthetic resin, The rib portion is provided obliquely between the plurality of first rib portions that are suspended from the flat plate portion to form a plurality of substantially rectangular parallelepiped first cavities and the plurality of first rib portions. A concrete formwork weir plate, comprising a plurality of second rib portions forming a plurality of triangular prism-shaped second cavities.   The dam plate for concrete formwork according to claim 1, wherein a mark portion is formed on an outer surface of the flat plate portion where the first cavity portion of the rib portion is located.   The said synthetic resin contains a polypropylene, a talc, and a calcium carbonate, The weir board for concrete forms of Claim 1 or Claim 2 characterized by the above-mentioned.   In addition to the concrete formwork dam plate according to any one of claims 1 to 3, a flat cover portion capable of covering an end surface of the concrete formwork dam plate, and a protrusion to the cover portion. A slat for a concrete formwork with a lid, comprising: a lid provided with a plurality of protrusions that are detachably fitted into the first cavity. 5. The concrete type with a lid according to claim 4, wherein the protrusion is a thin piece having a substantially rectangular shape on the front surface and is disposed obliquely with respect to the longitudinal direction of the flat cover portion. Frame dam plate.