JP5636770B2 - Concrete casting form sheet, manufacturing method thereof and construction method thereof - Google Patents

Description

  The present invention relates to a concrete casting form sheet, a manufacturing method thereof, and a construction method thereof. More specifically, when a sheet is stretched on a formwork, the tension can be visually confirmed, and anyone can construct the sheet. However, the present invention relates to a concrete casting form sheet that can stably and efficiently be spread uniformly without wrinkles, a manufacturing method thereof, and a construction method thereof.

For example, as seen in construction sites, plywood formwork and steel formwork are installed, and ready-mixed concrete is poured into it to construct a frame or wall. A water-permeable form sheet is attached to the above-mentioned formwork and used because it causes scratches on the concrete surface that is made of water and significantly affects the beautification of the surface.
In general, this water-permeable form sheet has a water-permeable film provided with a large number of micropores through which excess water and air of fresh concrete circulate, but cement particles do not circulate, and excess water and air that have flowed out of the micropores. It is comprised from the water-permeable base material which discharge | emits to the exterior (patent document 1: Unexamined-Japanese-Patent No. 7-34660).
And conventionally, as a method for constructing such a water-permeable mold sheet, first, one end of the water-permeable mold sheet is fixed to one side surface of one end of the mold in the longitudinal direction with a nail or the like, and the water-permeable mold After the frame sheet is unfolded and the other end of the water-permeable mold sheet is fixed with a nail or the like to the side surface of the mold frame opposite to the longitudinal direction, the series of molds are then expanded after the longitudinal stretching is finished. The permeable mold sheet is stretched on the mold by repeatedly expanding the permeable mold sheet in the longitudinal direction of the frame in the short direction of the mold.
However, in this method, the force to deploy the water-permeable form sheet becomes an individual's sense, and if the force to deploy is too strong, the fixing portion of the water-permeable form sheet may be damaged, and the force to deploy is weak. After that, the water-permeable formwork sheet will be stretched without sufficiently removing the slackness, so that wrinkles will remain on the water-permeable formwork sheet. There was a significant loss.
For this reason, when the water-permeable formwork sheet is stretched on the formwork, a technique that enables stable and efficient uniform stretching without wrinkles no matter who has performed is required.

Japanese Patent Laid-Open No. 7-34660

  The present invention has been made in view of the above circumstances, and when a sheet is stretched on a formwork, the tension can be confirmed by visual observation, so that uniform stretching that does not cause wrinkles can be stably performed by anyone. It aims at providing the sheet | seat for concrete placement formwork which enables it efficiently and efficiently, its manufacturing method, and its construction method.

  In order to achieve the above object, the present invention, as a result of intensive studies, has found that a water-permeable base material interposed between the concrete casting formwork and the cast concrete, and the concrete placement of the water-permeable base material. A concrete casting form sheet including a water-permeable film laminated on the surface on the installation side, wherein the water-permeable film has a plurality of fine water-permeable through holes, and a first filter layer, A concrete casting mold sheet characterized by comprising two layers of a second filter layer having a plurality of fine water-permeable through holes and having a plurality of cuts penetrating the layers, When the sheet is spread on the frame, the opening / decrease of the through-cuts of the second filter layer of the sheet changes depending on the force for expanding the sheet, and the degree of uniformity of the size and shape of the entire sheet It can be confirmed visually, who found that a stable and efficiently allows uniform deployed that do not fall wrinkles even if construction, the present invention has been accomplished.

That is, this invention provides the following sheet | seat for concrete placement formwork, its manufacturing method, and its construction method.
Claim 1:
Concrete placement comprising a water-permeable base material interposed between the concrete placement formwork and the cast concrete, and a water-permeable film laminated on the surface of the water-permeable base material on the placement concrete side A sheet for formwork, wherein the water-permeable film includes a first filter layer having a plurality of fine water-permeable through holes, and a plurality of fine water-permeable through holes and penetrating the layers. cut and Tsu Do from the two layers of the second filter layer having a further, the through an aqueous base is white or pale color, the first filter layer is transparent, be white or pale color The concrete casting form sheet , wherein the second filter layer is black or a dense color .
Claim 2 :
It is laminated | stacked in order of said 2nd filter layer, said 1st filter layer, and said water-permeable base material from the casting concrete side, For concrete casting molds of Claim 1 characterized by the above-mentioned. Sheet.
Claim 3 :
It is laminated | stacked in order of said 1st filter layer, said 2nd filter layer, and the said water-permeable base material from the casting concrete side, For concrete casting molds of Claim 1 characterized by the above-mentioned. Sheet.
Claim 4 :
A claim 1-3 or concrete設型frame sheet manufacturing method according to the, after laminating a film of the film and nonporous with cuts plurality of through a plurality of fine penetrating both film A method for producing a concrete casting form sheet, characterized in that a water-permeable through hole is perforated and then laminated with a water-permeable base material.
Claim 5 :
A claim 1-3 or concrete設型frame sheet manufacturing method according to the, after stacking a film and non-porous film and a water-permeable substrate having a cut plurality of through, these films And the manufacturing method of the sheet | seat for concrete placement formwork characterized by drilling the fine water-permeable through-hole which penetrates a base material.
Claim 6 :
A concrete設型frame sheet method construction according to any one of claims 1 to 3 water-permeable base material side of the concrete設型frame sheet to one end surface of the concrete設型frame side When one end of the surface of the concrete casting mold is fixed and then the concrete casting mold sheet is spread toward the other end of the concrete casting mold side, the water permeable film of the concrete casting mold sheet A method for constructing a concrete casting form sheet, characterized in that the sheet is spread so that the opening degree of the through-cuts on the entire surface observed from the side is uniform.

  According to the present invention, when the sheet is stretched on the formwork, the tension can be confirmed by visual observation, so that the concrete can be stably and efficiently evenly spread without wrinkles by anyone. A casting form sheet, a manufacturing method thereof, and a construction method thereof can be provided.

It is a schematic sectional drawing which expands and shows some examples of the sheet | seat for concrete placement formwork of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic perspective view which expands and shows a part of example of the sheet | seat for concrete placement form of this invention, (a) has shown the state before extension of this sheet | seat, (b) has extended this sheet | seat. The state when doing is shown. It is a schematic perspective view which expands and shows a part of other example of the sheet | seat for concrete placement form of this invention, (a) has shown the state before expansion | extension of this sheet | seat, (b) is this sheet | seat This shows the state after the extension. (A)-(h) is a schematic plan view which expands and shows a part of example of the pattern of the penetration notch of the 2nd filter layer of the sheet | seat for concrete placement formwork of this invention. (A), (b) shows a part of the example of the arrangement | sequence of the dotted | punctate or linear partial heat-sealing of the 2nd filter layer and 1st filter layer of the sheet | seat for concrete placement molds of this invention. It is a top view which expands and shows. It is a schematic sectional drawing which expands and shows a part of example of the sheet | seat for conventional concrete placement formwork.

BEST MODE FOR CARRYING OUT THE INVENTION

As shown in FIG. 1, a concrete placement form sheet 1 according to the present invention includes a water-permeable base material 2 interposed between a concrete placement form 9 and a placement concrete 10, A concrete casting form sheet 1 including a water-permeable film 5 laminated on a surface of the water-based substrate 2 on the side of the cast concrete 10, wherein the water-permeable film 5 has a plurality of fine water permeability. It consists of two layers of the 1st filter layer 3 which has the through-hole 6, and the 2nd filter layer 4 which has the some incision 8 which has the some fine water-permeable through-hole 7 and penetrates the layer 4. A concrete casting form sheet 1 characterized by the above.
The concrete casting form sheet 1 according to the present invention is a second example having a plurality of cuts 8 penetrating the layer 4 in particular, compared to the conventional concrete casting form sheet 1 ′ shown in FIG. It is characterized by having a filter layer 4.

  Such a concrete casting form sheet 1 is not particularly shown, but first, one end of the sheet 1 is fixed to one side surface of one end of the form 9 in the longitudinal direction with a nail or the like, as in the prior art. At the same time, the sheet 1 is unfolded and the other end of the sheet 1 is fixed to the end side surface opposite to the longitudinal direction of the mold 9 with a nail or the like. The sheet 1 is expanded on the mold 9 by repeatedly expanding the sheet 1 in the longitudinal direction of the mold 9 in the short direction of the mold 9.

  Here, in the concrete casting form sheet 1, the water-permeable film 5 has a first filter layer 3 having a plurality of fine water-permeable through holes 6 and a plurality of fine water-permeable through holes 7. And the second filter layer 4 having a plurality of cuts 8 penetrating the layer 4, the sheet 1 is unfolded when the sheet 1 is applied to the concrete casting form 9. By adjusting the force, the degree of opening of the through-cut 8 of the second filter layer 4 of the sheet 1 is changed, and the degree of uniformity of the size and shape of the entire sheet can be visually confirmed. However, it is possible to stably and efficiently make uniform expansion without wrinkling by anyone, by spreading so that the opening degree of the through cuts of the entire sheet is uniform. Kill.

FIGS. 2 and 3 are examples showing how the through-cuts 8 of the second filter layer 4 are opened when the concrete casting form sheet 1 is spread on the concrete casting form 9.
The concrete casting form sheet 1 in FIG. 2 has a water-permeable base material 2 and a water permeable film 5 composed of a first filter layer 3 and a second filter layer 4 laminated in this order. The concrete casting form sheet 1 has a water permeable film 5 composed of a water-permeable substrate 2, a second filter layer 4, and a first filter layer 3 laminated in this order. That is, in FIG. 2 and FIG. 3, the first filter layer 3 and the second filter layer 4 in the water permeable film 5 are interchanged.

2 and 3, the concrete casting form sheet 1 is stretched with the surface on the water-permeable substrate 2 side facing the surface on the concrete casting form 9 side.
2A and 3A show a state before the sheet 1 is stretched in the longitudinal direction of the mold 9, and the sheet 1 still has the longitudinal direction of the mold 9, that is, Since no development force is applied in the horizontal direction in the drawing, the through-cut 8 of the second filter layer 4 remains closed.
However, when the sheet 1 is expanded from this state, as shown in FIG. 2B and FIG. 3B, the sheet 1 is placed in the longitudinal direction of the mold 9, that is, in the horizontal direction in the figure. Since the unfolding force is applied and the through-cuts 8 of the second filter layer 4 are opened, the size and shape of the plurality of through-cuts 8 with respect to the entire sheet 1 are made uniform. As long as it is stretched, it becomes possible to stably and efficiently make uniform stretching without wrinkles no matter who constructs it.

In that case, in the concrete casting form sheet 1 of the embodiment of FIG. 2 or FIG. 3, it is important that the size of the plurality of through-cuts 8 and the uniformity of the shape of the plurality of through cuts 8 can be recognized with respect to the entire sheet 1, For example, it is preferable that the water-permeable substrate 2 has a white or light white color, the first filter layer 3 has a transparent, white or light white color, and the second filter layer 4 has a black or dark color.
Here, the pale white color is preferably a standard color such as gray or yellow, and has high lightness and low saturation.Specifically, gray, cream, ivory, etc. are preferred, and a rich color is A standard color such as black, dark blue or the like having a low lightness is preferable. Specifically, black, dark blue, green, or the like is preferable. Among these, in consideration of the contrast of the color scheme in outdoor work, a combination of white and black and a combination of white and green are particularly preferable.

In this way, the second filter layer 4 is black or a dense color, the other water-permeable base material 2 and the first filter layer 3 are white, etc. In the concrete casting form sheet 1, when the through cut 8 in the second filter layer 4 is opened, the first filter layer 3 behind the opening can be exposed and recognized, Further, in the concrete casting form sheet 1 of the embodiment of FIG. 3, when the through cut 8 in the second filter layer 4 is opened, the water-permeable substrate 2 exposed behind the opening is exposed. It can be recognized through the first filter layer 3.
In the present invention, when the sheet 1 is stretched, as long as the size and shape uniformity of the plurality of through cuts 8 with respect to the entire sheet 1 can be recognized, the sheet 1 is in any of the modes shown in FIGS. Although the embodiment of FIG. 2 has a second filter layer 4 having a through-cut 8 at the top of the sheet 1, the embodiment of FIG. 3 has a first filter at the top of the sheet 1. Since the filter layer 3 of FIG. 2 is cut off and the second filter layer 4 having the through-cuts 8 is shielded, the above-mentioned recognition quality is generally higher in the embodiment of FIG. 2 than in the embodiment of FIG. That is, the concrete casting form sheet 1 in which the second filter layer 4, the first filter layer 3, and the water-permeable base material 2 are laminated in this order from the casting concrete 10 side is more preferable.

The material of the first filter layer 3 and the second filter layer 4 constituting the water-permeable base material 2 and the water-permeable film 5 constituting the concrete casting form sheet 1 is not particularly limited, and is conventionally known. The same thing as the water-permeable base material and water-permeable film of the formwork sheet | seat of a well-known ready-mixed concrete placement work can be used.
For example, as the water-permeable substrate, a nonwoven fabric and / or a woven fabric produced by a spunbond method, a needle punch method, or the like using a synthetic resin such as polyethylene, polypropylene, polyester, and nylon can be used. As such a nonwoven fabric and / or woven fabric, those having a basis weight of 30 to 500 g / m ² , particularly 50 to 200 g / m ² , a thickness of 0.1 to 5 mm, and particularly 0.2 to 3 mm are preferable.
In addition, the first filter layer 3 and the second filter layer 4 forming the water permeable film 5 are made of an inflation method using a synthetic resin such as polyethylene, polypropylene, polyester, ethylene vinyl acetate copolymer, vinyl chloride, and nylon. A film produced by a T-die method, a solution casting method, a calendar method, or the like and having water-permeable through holes 6 and 7 perforated by a method described later can be used.
As such a film, each of the first filter layer 3 and the second filter layer 4 has a basis weight of 10 to 100 g / m ² , particularly 20 to 50 g / m ² , and a thickness of 0.005 to 0.4 mm, particularly The thing of 0.01-0.1 mm and also 0.02-0.05 mm is preferable.
Further, the total thickness of the first filter layer 3 and the second filter layer 4 is preferably 0.04 to 0.4 mm, particularly preferably 0.06 to 0.2 mm. If it is less than 0.04 mm, wrinkles may occur in the laminating process or the punching process, and if it exceeds 0.4 mm, the rigidity becomes too high and it may be difficult to handle.
Furthermore, the thickness ratio between the first filter layer 3 and the second filter layer 4 is preferably about 1: 1 to 1: 3, and more preferably about 1: 1 to 1: 1.5. Thus, by making the thickness of the second filter layer 4 somewhat larger than the thickness of the first filter layer 3, a through-cut 8 is made in the second filter layer 4 relative to the first filter layer 3. Even after providing, mechanical strength such as tear strength of the second filter layer 4 can be kept high.
In addition, both the first filter layer 3 and the second filter layer 4 can use any of unstretched, uniaxially stretched, and biaxially stretched films, but there is little difference in elongation between the longitudinal direction and the width direction. In particular, biaxial stretching is most preferable in consideration of non-stretching and mechanical strength such as tear strength.

  Moreover, it is important that the average diameter of the water permeable through holes 6 and 7 provided in the first filter layer 3 and the second filter layer 4 circulates fresh water surplus water and air but does not circulate cement particles. 100 to 800 μm, particularly 200 to 400 μm is preferable.

The film forming the water permeable substrate 2 and the water permeable film 5 (the film forming the first filter layer 3 and the film forming the second filter layer 4) is usually made of a synthetic resin such as polyethylene. However, since it is transparent, colorless, or white, it is necessary to color at least the film forming the second filter layer 4 in black or a dense color in order to give contrast of the color scheme to the film forming the first filter layer 3. There is.
The coloring of such a film is, for example, 0.01 to 75% by mass, particularly 0.1 to 50% by mass of the above black or dark pigment in a synthetic resin such as polyethylene in the film production as described above. More preferably, it may be added in an amount of 1 to 30% by mass. If it is less than 0.01% by mass, a sufficient coloring effect may not be obtained, and if it exceeds 75% by mass, the film strength and the like may be remarkably lowered.

Here, the film forming the water-permeable substrate 2 and the first filter layer 3 is normally transparent, colorless, or white as described above, and therefore, in particular, as long as the film forming the second filter layer 4 is colored. In this case, it is not necessary to color.
However, you may color the film which makes the water-permeable base material 2 and the 1st filter layer 3 in a pale white color as needed.
As described above, the color of the film constituting the first filter layer 3 may be the same as the color of the second filter layer 4, or a commercially available film colored in advance may be used.
The coloring of the water-permeable base material 2 is, for example, 0.01 to 75% by mass, particularly 0.1 to 75% by weight of a light white pigment in a synthetic resin such as polyethylene in the production of a nonwoven fabric and / or a woven fabric as described above. What is necessary is just to mix | blend 50 mass%, More preferably, 1-30 mass%. If it is less than 0.01% by mass, a sufficient coloring effect may not be obtained, and if it exceeds 75% by mass, the film strength and the like may be remarkably lowered.
Further, the non-woven fabric and / or woven fabric as described above may be dyed by immersing in a bath in which the light white pigment is dissolved. Conditions such as bath temperature, immersion time, drying temperature, and drying time are not particularly limited and can be set as appropriate.

The plurality of through-cuts 8 provided in the second filter layer 4 can easily confirm the degree of uniformity of the size and shape of the through-cuts 8 with respect to the entire sheet 1 when the sheet 1 is expanded on the mold 9. Therefore, it is preferable that lines having the same length and / or patterns having the same shape are regularly arranged in advance. For example, patterns (a) to (h) in FIG. 4 are exemplified.
The regular arrangement here means that when an arbitrary vertical axis and / or parallel axis is provided with respect to the longitudinal direction of the plane of the second filter layer 4, the vertical axis and / or parallel axis. This means that lines having the same length and / or patterns having the same shape are arranged symmetrically.
In FIG. 4, although not shown in particular, in addition to (e), a pattern (e) ′ in which each vertical waveform in (e) is rotated by 90 ° as it is and replaced with a horizontal waveform (this is a vertical linear pattern). The pattern (a) is rotated by 90 ° as it is to obtain a pattern (c) in which the pattern is changed to a horizontal alignment)), and the adjacent rows of (e) and (e) ′, or A pattern (e) '' (which is shifted from the pattern (a) to the pattern (b ) And (e) ′ ″ (this is the same conversion as pattern (d) obtained from pattern (c)).
In FIG. 4, although not shown in the same manner, in addition to (f), a pattern (f) ′ (this is obtained by rotating each vertical square shape of (f) as it is by 90 ° and replacing it with a horizontal square shape. Is the same transformation as that obtained by rotating the vertical linear pattern (a) by 90 ° as it is to obtain the pattern (c) changed to the horizontal linear pattern), and (f) and (f) ′. A pattern (f) '' (which is shifted by one-half of each character-shaped row or column between columns or rows so that the individual character shapes of adjacent rows or columns of , And (f) ′ ″ (this is the same transformation as pattern (d) obtained from pattern (c). :)

However, for example, in the case of a pattern composed of simple vertical lines or horizontal lines such as the pattern (a) or (c) in FIG. 4, the pattern is developed in a direction perpendicular to these lines. When a force is applied, the through-cut 8 opens smoothly. On the other hand, when a force that develops in a direction parallel to this is applied, the through-cut 8 may not open. In some cases, the magnitude of the opening force of the through-cut 8 is not properly reflected in the size and shape of the through-cut 8.
From this point of view, when the sheet 1 is spread on the mold 9 among the patterns of the through cuts 8, it is not easily influenced by the direction of the force that unfolds the sheet 1 (b), (d), (e) , (E) ′, (e) ″, (e) ′ ″, (f), (f) ′, (f) ″, (f) ′ ″, (g) and (h) patterns Is more preferable, and the pattern (g) or (h) is most preferable in consideration of a particularly simple pattern, that is, easy processability.

Such a through-cut 8 has a substantially circular diameter of 0.2 to 3.0 mm, more preferably 0.5 to 1.5 mm formed at the time of opening. When the substantially circular diameter formed at the opening is less than 0.2 mm, the color of the lower layer exposed from the opening may not be recognized, and when it exceeds 3.0 mm, the end fixing portion of the sheet 1 is Since it may be damaged, it is not preferable.
Considering the size of such a substantially circular shape, the length of the circumference corresponds to twice the length of the through-cut 8, and therefore the length of the through-cut 8 is 0.314 to 4.710 mm when calculated in reverse. Is more preferable, and 0.785 to 2.355 mm is more preferable.
The interval between the adjacent through cuts 8 is preferably about 30 to 200% with respect to the length of the through cuts 8. If the interval between adjacent through cuts 8 is less than 30%, the second filter layer may break at the time of opening. If over 200%, the vertical and horizontal arrangement ratio of the through cuts 8 is disturbed, and the opening In this case, it is difficult to visually recognize the regularity of the pattern, which is not preferable.

The method for providing such a pattern on the film is not particularly limited. For example, a mold that forms a part of the pattern is prepared by combining a plurality of thin blades with sharp tips such as cutter blades. In this mold, the blade may be pressed so as to penetrate the entire surface of the film.
Also, the above-mentioned pattern formed by combining a plurality of thin blades with a sharp tip like a cutter blade is provided on the roll surface, and a twin roll is produced together with a receiving roll that makes a pair with this pattern. And the blade may penetrate the entire surface of the film.

The method for producing the concrete casting form sheet 1 using the respective constituent materials obtained in this manner is obtained by laminating the film having the plurality of through cuts 8 and the non-porous film, and then laminating both films. A plurality of fine water-permeable through-holes 7 and 6 penetrating therethrough and then laminated with the water-permeable substrate 2, or the film having the plurality of through-cuts, the non-porous film, and the water-permeable substrate After laminating 2, fine water-permeable through holes 7 and 6 penetrating these films and the substrate may be perforated.
Here, in the lamination of each layer, the respective layers are bonded or heat-sealed. However, since the former manufacturing method follows the procedure of bonding or heat-sealing after drilling, the permeable through holes 6 and 7 are closed. On the other hand, in the latter manufacturing method, since the steps of drilling are performed after all the layers are bonded or heat-sealed, the water-permeable through holes 6 and 7 are not blocked. The production method is more preferable.

In addition, each layer may be laminated using an adhesive such as hot melt, or the layers may be heat-sealed as they are. In particular, the opening property of the through-cut 8 in the second filter layer 4 may be used. Since it is important not to damage the film, partial adhesion or partial heat fusion such as dotted or linear is preferable.
Furthermore, such an arrangement of partial adhesion or partial heat fusion may be an arrangement with regularity while avoiding the through cuts 8 in accordance with various patterns of the second filter layer 4 in particular. More preferred.
Here, the regular arrangement is the same as the above meaning, and when an arbitrary vertical axis and / or parallel axis is provided with respect to the longitudinal direction of the plane of the second filter layer 4, It means that partial adhesion or partial heat fusion such as dot or line is arranged symmetrically with respect to the axis and / or parallel axis.

  (A) in FIG. 5 shows an example of the arrangement of the dotted partial heat fusion 11 when the second filter layer 4 has the pattern (b) in FIG. b) shows an example of the arrangement of the linear partial heat-sealing 12 in the same pattern. Thus, by arranging the dotted or linear partial fusions 11 and 12 having regularity while avoiding the through cuts 8 in accordance with the pattern of the second filter layer 4, in particular, This is preferable because not only the opening property of the through cut 8 of the second filter layer 4 is ensured but also the direction of the force of developing the sheet 1 is hardly affected.

In addition, when adhering each layer using an adhesive such as hot melt, a known film adhesion method may be followed, for example, using a known polyolefin-based, polyamide-based hot-melt adhesive, This may be supplied to a known dispenser or the like, heated to the melting point or higher and melted, and protruded in a dot or line shape between the above arbitrary layers and pressed from the outside of both layers.
Further, when fusing each layer, a known film fusing method may be followed. For example, a known heatable roll surface is used as a double roll having a point or line embossing process. What is necessary is just to let the said arbitrary laminated body pass through between this for 0.2 second-several seconds by heating to about 150-300 degreeC.

Regarding the perforation of the water permeable through holes 7 and 6, a sword mountain composed of an arbitrary number of needles having a maximum diameter of 100 to 800 μm and a pitch of 0.5 to 5 mm, more preferably a maximum diameter of 200 to 400 μm and a pitch of 1 to 3 mm. It is sufficient to use a die set that receives the light and to penetrate the laminated body composed of the two or three layers. When the maximum diameter is 100 μm and the pitch is less than 0.5 mm, the cement particles may be clogged, and when the maximum diameter is 800 μm and the pitch exceeds 5 mm, the cement particles may flow out, which is not preferable.
Note that the penetration power is not particularly limited, and any pressing machine may be used either manually.

The construction method of the concrete casting form sheet 1 obtained in this way is as follows. One end of the surface on the water-permeable base material 2 side of the concrete casting form sheet 1 is provided on one end of the concrete casting form sheet 9 side. When the concrete casting form sheet 1 is stretched toward the other end of the concrete casting form 9 side, the water-permeable film 5 of the concrete casting form sheet 1 is fixed. It is characterized in that it is stretched so that the opening degree of the entire through cut 8 observed from the side is uniform, and as a result of performing such stretching, the force for spreading the sheet 1 is obtained. Therefore, it is possible to stably and efficiently make uniform stretching without wrinkles regardless of who constructs.
Here, the second filter layer means that the opening of the entire through cut 8 observed from the water permeable film 5 side of the concrete casting form sheet 1 is uniformly spread. This means that the opening of the four through-cuts 8 is spread so as to be uniform with respect to the entire sheet 1 of each size and shape. This is because such stretching will adjust the force so as to spread the sheet 1 uniformly in all directions.

As mentioned above, although this invention was demonstrated based on the example of suitable embodiment, this invention is not limited to these, In the range which does not deviate from the summary of this invention, it can change variously.
That is, according to the present invention, when the sheet 1 is applied to the concrete casting form 9, the opening degree of the through cut 8 of the second filter layer 4 of the sheet 1 is adjusted by adjusting the force for expanding the sheet 1. Since the degree of uniformity of the entire size and shape of the entire sheet can be confirmed by visual observation, by looking at it and expanding it so that the penetration depth of the entire sheet is uniform, It is characterized by being able to stably and efficiently make uniform spreading without wrinkles even after construction.
Therefore, the pattern of the through-cut 8 is the above-described (a) to (h), (e) ′, (e) ″, (e) ′ ″, (f) ′, (f) ″, and (f It is not limited to '''', and may be a pattern obtained by combining individual lines or patterns forming these patterns. Further, the individual lines or patterns may be patterns other than those exemplified in the present invention, and may be a combination of them.
Further, the second filter layer 4 and the first filter layer 3 may be bonded or heat-sealed in an arrangement other than the dotted or linear shape exemplified in the present invention.
Further, the concrete casting form sheet is laminated between a water-permeable base material interposed between the concrete casting formwork and the casting concrete, and the surface of the water-permeable base material on the casting concrete side. Therefore, if necessary, the sheet is placed on the outer side of the water-permeable substrate 2 of the sheet 1, that is, on the surface on the concrete casting form 9 side. Furthermore, for example, a non-permeable film shown in JP-A-7-34660 may be laminated. By providing such a water-impermeable film, moisture evaporation from the concrete surface is moderately suppressed and a wetting effect is obtained, so that proper curing of the concrete can be performed.

  According to the present invention, when the sheet is stretched on the formwork, the tension can be confirmed by visual observation, so that the concrete can be stably and efficiently evenly spread without wrinkles by anyone. Since it is possible to provide a casting form sheet, a manufacturing method thereof, and a construction method thereof, it is not necessary to impair the surface aesthetic when building a frame or a wall by pouring ready-mixed concrete into a formwork. Useful for.

DESCRIPTION OF SYMBOLS 1 Sheet | seat for concrete casting mold 2 Water-permeable base material 3 1st filter layer 4 2nd filter layer 5 Water-permeable film 6 Water-permeable through-hole 7 of 1st filter layer Water-permeable of 2nd filter layer Through-hole 8 Through-cut 9 Concrete casting mold 10 Casting concrete 11 Dotted partial heat fusion 12 Linear partial heat fusion

Claims (6)

Concrete placement comprising a water-permeable base material interposed between the concrete placement formwork and the cast concrete, and a water-permeable film laminated on the surface of the water-permeable base material on the placement concrete side A sheet for formwork, wherein the water-permeable film includes a first filter layer having a plurality of fine water-permeable through holes, and a plurality of fine water-permeable through holes and penetrating the layers. cut and Tsu Do from the two layers of the second filter layer having a further, the through an aqueous base is white or pale color, the first filter layer is transparent, be white or pale color The concrete casting form sheet , wherein the second filter layer is black or a dense color . It is laminated | stacked in order of said 2nd filter layer, said 1st filter layer, and said water-permeable base material from the casting concrete side, For concrete casting molds of Claim 1 characterized by the above-mentioned. Sheet. It is laminated | stacked in order of said 1st filter layer, said 2nd filter layer, and the said water-permeable base material from the casting concrete side, For concrete casting molds of Claim 1 characterized by the above-mentioned. Sheet. A claim 1-3 or concrete設型frame sheet manufacturing method according to the, after laminating a film of the film and nonporous with cuts plurality of through a plurality of fine penetrating both film A method for producing a concrete casting form sheet, characterized in that a water-permeable through hole is perforated and then laminated with a water-permeable base material. A claim 1-3 or concrete設型frame sheet manufacturing method according to the, after stacking a film and non-porous film and a water-permeable substrate having a cut plurality of through, these films And the manufacturing method of the sheet | seat for concrete placement formwork characterized by drilling the fine water-permeable through-hole which penetrates a base material. A concrete設型frame sheet method construction according to any one of claims 1 to 3 water-permeable base material side of the concrete設型frame sheet to one end surface of the concrete設型frame side When one end of the surface of the concrete casting mold is fixed and then the concrete casting mold sheet is spread toward the other end of the concrete casting mold side, the water permeable film of the concrete casting mold sheet A method for constructing a concrete casting form sheet, characterized in that the sheet is spread so that the opening degree of the through-cuts on the entire surface observed from the side is uniform.

Images