JPH09125693A - Form for placing concrete and reinforcing method of the form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent occurrence of deflection in a form after placing of concrete and thereby to obtain a smooth concrete surface. SOLUTION: Outer peripheral ribs 3 are provided in the whole outer periphery of a sheathing board 2, while a plurality of plate-shaped longitudinal ribs 4 being parallel to the longitudinal side of the sheathing board 2 and connecting the opposite outer peripheral ribs in the lateral direction are so provided as to have the same height H as the outer peripheral ribs 3. A form 1 wherein a cut having a depth of 0.3H-H from the fore end parts of the ribs is provided at least in one place for all or at least two adjacent ones of the plate-shaped longitudinal ribs 4 so that it traverses the plate-shaped longitudinal ribs 4 and is positioned at an equal distance from the ends on one side of the ribs, and a reinforcing material 7 which is so fitted in each cut 6 of the adjacent plate- shaped longitudinal ribs 4 of the form 1 as not to project from the fore end parts of the plate-shaped longitudinal ribs 4 and to intersect these ribs perpendicularly and connects the plate-shaped longitudinal ribs 4 with each other, are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete pouring formwork and a method for reinforcing a concrete pouring formwork using the same.

[0002]

2. Description of the Related Art It is well known that concrete casting forms are often used for concrete and mortar in construction fields such as construction and civil engineering. Various materials such as wood and metal are known as materials for such concrete pouring formwork, but the former wooden formwork deteriorates in surface condition with repeated use and is used several times. However, there is a strong demand for alternatives due to recent global environmental problems, and the latter metal formwork has a problem of rust and poor storage performance, and it has a problem of poor handleability due to its heavy weight. .

As a solution to such a problem, a resin-made concrete casting mold has been developed in recent years (for example, Kaihei 6-129094) and has been widely used. Such a resin concrete pouring formwork has, for example, as shown in FIG. 1, a flat plate portion called a weir plate, outer peripheral ribs provided on the entire outer periphery of the weir plate, and vertical and / or vertical directions of the weir plate. It is composed of a plurality of plate-shaped ribs that are parallel to the lateral sides and that are connected at both ends. (However,
Since the rib surface side is shown in FIG. 1, the weir plate is the back surface. ) In general, such a resin concrete pouring formwork is often used with the longitudinal direction being vertical. Therefore, in order to increase the rigidity in the longitudinal direction, plate-like ribs are also mainly used in the longitudinal direction of the weir board. The plate-shaped vertical ribs that are parallel to the sides and connect both ends are provided as auxiliary plates, and the plate-shaped horizontal ribs that are parallel to the lateral sides of the weir and connect both ends are also provided in consideration of weight reduction. For this reason, the rigidity in the horizontal direction is generally lower than the rigidity in the vertical direction.

When the wall surface of a building structure or the like is concrete-placed using such a resin concrete pouring formwork, if the wall surface height is higher than the height of the standard formwork, the resin construction Even if the concrete pouring formwork was installed in the vertical direction according to the usual use method, the height was insufficient, and it was often necessary to additionally use the concrete formwork in the horizontal direction on the upper part thereof. However, in such a case, the rigidity in the vertical direction (width direction) of the laterally-used resin concrete pouring formwork added to the upper part is insufficient, and there is a problem that the bending becomes large during concrete pouring. there were.

[0005]

SUMMARY OF THE INVENTION
The present inventors have completed the present invention as a result of studying a mold that solves the above-mentioned problems and allows a resin-made concrete casting mold to be used laterally.

[0006]

SUMMARY OF THE INVENTION According to the present invention, an outer peripheral rib is provided on the entire outer periphery of a weir plate, and a plurality of plate-shaped vertical ribs connecting both outer peripheral ribs parallel to the vertical sides of the weir plate and in the horizontal direction. Are provided so as to have the same height (H) as the outer peripheral ribs, and all or at least two adjacent plate-shaped vertical ribs are
At least one notch having a depth of 0.3H to H from the tip of the rib is provided so as to traverse the plate-shaped vertical rib and at a position equidistant from one end of the rib. The frame and the plate-like vertical ribs are fitted to each other at the same height as the plate-like vertical ribs and so as to be orthogonal to the plate-like vertical ribs so that the plate-like vertical ribs are fitted to each other. Concrete pouring, characterized in that both ends are connected to each other and a reinforcing material having a length in contact with the inner wall surface of another plate-like vertical rib adjacent to the vertical rib and / or the outer peripheral rib. It is to provide a formwork for use.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
As shown in FIG. 2, the concrete pouring formwork of the present invention comprises a weir board (2), outer peripheral ribs (3) provided on the entire outer circumference of the weir board, and parallel and horizontal directions to the vertical sides of the weir board. A plurality of plate-shaped vertical ribs (4) provided so as to connect both outer peripheral ribs and have the same height (H) as the outer peripheral ribs, and parallel to the lateral sides of the weir plate that may be additionally provided. And a plate-shaped horizontal rib (5) connecting both outer peripheral ribs in the vertical direction, and all or at least two adjacent plate-shaped vertical ribs cross the plate-shaped vertical rib and A mold (1) having notches (6) each having a depth of 0.3H to H from the tip of the rib at a position equidistant from one end of the mold (1), and the mold (1). Cuts between adjacent plate-shaped vertical ribs so that they do not protrude from the tips of the plate-shaped vertical ribs and are orthogonal to the vertical ribs. The plate-shaped vertical ribs having the notches are connected to each other, and the lengths at which both end surfaces are in contact with the inner wall surface of the other plate-shaped vertical ribs adjacent to the vertical ribs and / or the outer peripheral ribs are determined. The reinforcing material (7) has. In addition, in the same figure, in order to facilitate understanding, a portion in which the reinforcing material is not fitted in the notch of the plate-shaped vertical rib is also shown.

In this formwork (1), the weir plate (2) is provided with at least two plate-shaped vertical ribs (4) in order to obtain a desired strength as a formwork for concrete pouring. The plate-shaped horizontal ribs (5) are not always necessary because there is a problem of weight reduction depending on the size and shape of the form, but the rib-shaped horizontal ribs (5) have a rib interval wider than that of the plate-shaped vertical ribs and are auxiliary. Often provided in.

In the formwork (1) constituting the concrete pouring formwork of the present invention, all or at least two adjacent plate-like vertical ribs (4) are arranged so as to traverse the plate-like vertical ribs. A notch (6) is provided. Since the notch is for fitting the reinforcing member so as to be orthogonal to the plate-shaped vertical ribs and to connect the plate-shaped vertical ribs to each other, The number, the position, the depth, the width, the shape of the cut, and the like are appropriately determined depending on the number of reinforcing materials to be fitted therein, the arrangement state, the cross-sectional shape, and the like. Here, even if the cut positions are different from each other or the cuts are provided in the plate-shaped vertical ribs that are not adjacent to each other, the reinforcing material cannot be fitted. Further, when such a notch is provided only in one plate-shaped vertical rib, even if a reinforcing material is fitted into this notch, the reinforcing material becomes unstable and the rigidity is not sufficiently improved. It is necessary to provide the plate-shaped vertical ribs at the same position and to connect them at right angles. The larger the number of plate-shaped vertical ribs to be connected, the more effective the rigidity is. As shown in FIG. It is most preferable to provide notches at the same positions of all plate-like vertical ribs, and to connect all plate-like vertical ribs by fitting a reinforcing material into these notches. It is most preferable to provide a plurality of reinforcing materials for connecting the above. However, as illustrated in the concept of FIG. 3, when a plurality of reinforcing members are used at appropriate intervals, the number of plate-shaped vertical ribs connected by each reinforcing member and the number of plate-shaped vertical ribs connected by each reinforcing member may be changed depending on the usage of the formwork. The intervals of the respective reinforcing members may be different, for example, only a suitable number of plate-shaped vertical ribs are connected in a portion near both ends of the form, and all plate-shaped vertical ribs are connected in the center of the form. However, depending on the usage conditions of the mold, the arrangement state may be different in the part of the mold.

The depth of the notch varies depending on the shape of the reinforcing material to be fitted therein, but is 0.3H from the rib tip.
It is necessary to be in the range of to H, and when the depth of cut is shallower than this, the fitting of the reinforcing material is not sufficient, and the depth of cut is H, that is, the depth of the rib from the tip of the plate-like vertical rib is larger than that of the rib. It is effective to provide the notch at the entire height of the rib up to the base because the reinforcing material can be fitted sufficiently. In addition, the depth of the cut may be different in each plate-shaped vertical rib as long as it is within the above range, and the depth can be changed depending on the shape of the reinforcing material. The shape and width of the cut are appropriately set according to the shape of the reinforcing material to be fitted, and are not particularly limited, but at least when the reinforcing material is fitted, it is necessary to prevent a gap. For example, when the reinforcing material is plate-shaped, a notch having a width corresponding to the plate thickness, and when the reinforcing material has a T-shaped cross section, a notch having a shape corresponding to the T-shape is also provided. When the material has a rectangular box shape or a bar shape, a cut having a shape corresponding to the outer circumference or the extrapolated cross section is provided. The relationship between the shape of the reinforcing material and the shape of the cut is shown in FIG.
~ This is illustrated in Fig. 6. Further, an example of a reinforcing material other than those illustrated in FIG.

The reinforcing material (7) to be combined with such a formwork is arranged so that it does not protrude from the tip of the plate-like vertical ribs of the formwork and is orthogonal to the vertical ribs. Fitting in each of the notches of the ribs, the plate-like vertical ribs having the notches are connected to each other, and both end faces thereof are in contact with the inner wall surfaces of other plate-like vertical ribs and / or peripheral ribs adjacent to the vertical ribs. It has a length. Here, in order not to protrude from the tip of the plate-like vertical rib of the form, the end of the fitted reinforcement is provided on the form when the reinforcement is fitted into the cut. It means that it is the same as or lower than the tip of the plate-like rib that is
Even when the height is lower than the tip of the plate-like rib, it is preferably at least a half or more of the height of the plate-like vertical rib. It is most preferable that the tips have the same height, so that when reinforcing with thick ends during construction, the rib tips will have the same height as the other formwork connected to this, and the same height. Since it is possible to use thick wood, it is efficient.

When the lower end of the reinforcing member after fitting is separated from the dam, the effect of improving the rigidity is poor, and therefore it is preferable that the reinforcing member is in close contact with the dam surface. For that purpose, as shown in FIGS.
It is preferable to provide the reinforcing member with a notch corresponding to the notch as shown in FIG. For example, when the depth of the cut provided in the plate-like vertical rib as shown in FIG. 6 is H, it is not necessary to make the cut in the reinforcing material, but FIGS.
The cut of the plate-like vertical rib is deeper than 0.3H but is shallower than H, and the tip of the reinforcing member and the tip of the plate-like vertical rib are at the same height and the lower end is If you want to make a close contact with the weir board, H-
By providing a notch having a depth of (notch depth of the plate-shaped vertical rib), fitting can be made more reliable. Fig. 9 shows the T-shaped notch on the plate-shaped vertical rib,
The fitting state when a reinforcing material having a T-shaped cross section is fitted is shown. It should be noted that, in order to facilitate understanding, the drawing also shows the notched state of the plate-like vertical ribs and the shape of the reinforcing member in addition to the above.

By fitting such a reinforcing member into each of the notches that are equidistant from one end of the adjacent plate-like vertical ribs, the plate-like vertical ribs are orthogonal to each other, and the plate-like vertical ribs are separated from each other. Can be connected. Such reinforcements are
A length that is orthogonal to the plate-shaped vertical ribs, connects the plate-shaped vertical ribs, and has both end surfaces contacting the inner wall surface of another plate-shaped vertical rib adjacent to the plate-shaped vertical rib and / or the outer peripheral rib. It is necessary to have. At this time, the contact between the plate-shaped vertical ribs and / or the outer peripheral ribs on both end surfaces of the reinforcing material with the inner wall surface is preferably as close as possible without making a gap between the surfaces, whereby the reinforcing material is notched to the notch. Is fixed by fitting and surface contact of both end surfaces. in this case,
As shown in FIG. 8, both end surfaces of the reinforcing material bite into the inner wall surfaces of other plate-shaped vertical ribs and / or outer peripheral ribs adjacent to the plate-shaped vertical rib and have the same shape as the end surface of the reinforcing material. By slightly providing such a concave portion (8), the reinforcing material can be more reliably fixed without displacement.

Although the thickness and shape of each reinforcing material are arbitrary as described above, the material, shape and thickness of the reinforcing material
Alternatively, if the number of reinforcements installed is too small, a sufficient reinforcement effect cannot be obtained, and the formwork is deflected by the pressure of the concrete during concrete pouring, and a concrete surface having sound parallelism cannot be obtained. It is necessary to provide a reinforcing material so that the total rigidity (the product of the elastic modulus of the reinforcing material and the second moment of area of the reinforcing material) of the reinforcing material arranged in one mold is 2 × 10 ⁵ / kgf · cm ² or more. There is.

It is preferable that the reinforcing material is uniformly reinforced with respect to the entire surface of the formwork or at least the concrete placing surface. For this reason, one or a small number of the reinforcing material having extremely high rigidity is partially included. Use two or more reinforcing materials so that the total value of the rigidity of the reinforcing materials is more than the above value, and evenly install the reinforcing materials, and the entire formwork is more uniform. It is preferable to provide it so as to be reinforced.

In such a reinforcing member, it fits in the notch of the plate-shaped vertical rib to connect the adjacent plate-shaped vertical ribs, and both end faces of the reinforcing member are adjacent to the plate-shaped vertical rib. The cross-sectional shape is not particularly limited as long as it has a length in contact with the inner wall surface of the plate-like vertical ribs and / or outer peripheral ribs, and the rectangular shape, the square pipe shape, the H shape, the T shape as described above. Examples of the shape include a letter shape, but from the viewpoint of efficiency, a reinforcing material having an H shape, a T shape, or the like is effective. When such a reinforcing material is fitted in the notch of the plate-shaped vertical rib of the formwork, the fitting direction is such that when the reinforcing material is a rectangular shape such as a band, the width direction is perpendicular to the weir plate and in the case of the H shape. It is preferable that the flat portion is fitted in parallel with the weir plate, and in the case of T-shape, the flat portion above T is fitted in parallel with the weir plate.

As a method of attaching the reinforcing material to the formwork, it is only necessary to insert the reinforcing material into the notches provided in the plate-shaped vertical ribs of the formwork and fit them, or to prevent it from falling off, further using bolts. It may be fixed or joined by an adhesive or the like.

The material of the reinforcing material may be resin or metal, but resin is usually used. Examples of such resins include thermoplastic resins such as polyethylene, polypropylene, polyvinyl chloride, ABS resin, polyamide, and other general thermoplastic resins, modified products thereof, polymer alloys, and mixtures thereof. Thermosetting resins include Examples thereof include epoxy resin, unsaturated polyester resin, phenol resin, melamine resin and the like. If necessary, various additives such as various stabilizers, ultraviolet ray inhibitors and the like, colorants, and inorganic fillers may be added to such resins.

It is preferable that various reinforcing fibers are blended in these resins in order to improve strength and elastic modulus. Examples of the reinforcing fibers for this purpose include glass fiber, carbon fiber and aramid fiber. To be done. Such reinforcing fibers can be used in the form of both long fibers and short fibers, but it is effective that long fibers are mixed, and it is more effective that they are arranged in the longitudinal direction of the reinforcing material. Is. The amount of the reinforcing fiber blended with the resin is usually in the range of 5 to 60% by volume, preferably 10 to 50% by volume as the fiber content from the viewpoint of high rigidity and manufacturing problems, and the content is more than this range. If it is low, the effect of blending the reinforcing fiber cannot be sufficiently obtained, and if it exceeds this range, a problem occurs in molding.

When a metal is used as the reinforcing material,
Examples thereof include iron, aluminum, copper, magnesium, and alloys containing these metals as main components, and among these, aluminum or its alloys is preferable from the viewpoint of lightness and workability.

As described above, the outer peripheral ribs are provided on the entire outer circumference of the weir board which has been conventionally used, and the plate-shaped vertical ribs parallel to the vertical sides of the weir board are mainly provided to supplement the plate shape. Notches are provided in all or at least two adjacent plate-shaped vertical ribs of the concrete pouring formwork that may be provided with horizontal ribs, and a reinforcing material is fitted into these notches to connect the plate-shaped vertical ribs to each other. By connecting, the formwork, which originally had low rigidity when used in the horizontal direction, is reinforced with a reinforcing material, and this is used in the horizontal direction in the same manner as when using a normal concrete placing formwork in the vertical direction. Even if it is used, a smooth concrete surface can be obtained without bending the formwork after placing the concrete. When using the concrete pouring formwork of the present invention, even if the reinforcing material is fitted and used at the construction site, using a formwork in which a notch corresponding to the reinforcing material to be used is provided in the plate-shaped vertical ribs in advance. Good, using a normal formwork without cuts as shown in Fig. 1, make a cut corresponding to the shape of the reinforcing material to be used on the plate-like vertical ribs with a saw at the construction site, and add the reinforcing material to this. May be fitted and used, and the usage method is arbitrary.

[0022]

In the concrete pouring formwork of the present invention, since the rigidity in the lateral direction is reinforced by the reinforcing material through the notch provided in the plate-shaped vertical rib, the concrete pouring formwork is used as a normal concrete pouring formwork. Even when the frame is used in the horizontal direction in the same manner as when the frame is used in the vertical direction, a smooth concrete surface can be obtained without bending of the formwork after the concrete is cast.

[Brief description of the drawings]

FIG. 1 shows a conventional ribbed resin concrete casting formwork.

FIG. 2 shows a concrete pouring formwork of a reinforcing material fitting according to the present invention.

FIG. 3 is a concrete pouring formwork of the present invention, conceptually showing an example of an arrangement state of reinforcing materials.

FIG. 4 is a view exemplifying the relationship between the shape of the reinforcing material and the notches provided in the plate-like vertical ribs in the concrete pouring formwork of the present invention, where A is the plate-like vertical ribs provided with the notches. B indicates a reinforcing material fitted in the cut.

FIG. 5 is a view exemplifying the relationship between the shape of the reinforcing material and the cuts provided in the plate-shaped vertical ribs in the concrete pouring formwork of the present invention, in which A represents the plate-shaped vertical ribs provided with the cuts. B indicates a reinforcing material fitted in the cut.

FIG. 6 is a view exemplifying the relationship between the shape of the reinforcing material and the notches formed in the plate-shaped vertical ribs in the concrete pouring formwork of the present invention, in which A represents the plate-shaped vertical ribs provided with the notches. B indicates a reinforcing material fitted in the cut.

FIG. 7 shows another example of the reinforcing material in the concrete pouring formwork of the present invention.

FIG. 8 shows an example of the concrete pouring formwork of the present invention in which a concave portion is provided in the inner wall of the outer peripheral rib or the plate-shaped vertical rib so that the end portion of the reinforcing material bites.

FIG. 9 shows a fitted state of the plate-shaped vertical ribs and the reinforcing material in the concrete pouring formwork of the present invention.

[Explanation of symbols]

 1: Formwork 2: Weir board 3: Peripheral rib 4: Plate-shaped vertical rib 5: Plate-shaped horizontal rib 6: Notch 7: Reinforcing material 8: Recess

Claims (5)

[Claims] 1. An outer peripheral rib is provided on the entire outer periphery of a weir plate, and a plurality of plate-shaped vertical ribs that connect both outer peripheral ribs in the horizontal direction in parallel with the vertical sides of the weir plate have the same height as the outer peripheral rib. H)
All of the plate-shaped vertical ribs or at least two adjacent to the plate-shaped vertical ribs are provided so as to cross the plate-shaped vertical ribs and at positions equidistant from one end of the ribs. And a mold which is provided with at least one notch having a depth of 0.3H to H from each part, and which does not protrude from the tip of the plate-like vertical rib of the mold and is orthogonal to the vertical rib. As described above, the plate-shaped vertical ribs are fitted to each of the notches of the adjacent plate-shaped vertical ribs to connect the plate-shaped vertical ribs with each other, and both end faces of the plate-shaped vertical ribs are adjacent to the vertical ribs.
Alternatively, a concrete pouring formwork characterized by comprising a reinforcing material having a length in contact with the inner wall surface of the outer peripheral rib. 2. A plate-shaped vertical rib with which the end face of the reinforcing material is in contact, and / or
Alternatively, the concrete pouring formwork according to claim 1, wherein the inner wall surface of the outer peripheral rib has a recess into which the end surface of the reinforcing material can be fitted. 3. The concrete pouring formwork according to claim 1, wherein notches are provided in all the plate-shaped vertical ribs. 4. The concrete pouring formwork according to claim 3, wherein the plate-shaped vertical rib is provided with two or more notches. 5. An outer peripheral rib is provided on the entire outer periphery of the weir plate, and a plurality of plate-shaped vertical ribs connecting both outer peripheral ribs in the horizontal direction parallel to the vertical sides of the weir plate have the same height as the outer peripheral rib. H)
All of the plate-shaped vertical ribs or at least two adjacent to the plate-shaped vertical ribs are provided so as to cross the plate-shaped vertical ribs and at positions equidistant from one end of the ribs. The cuts of the molds each having a depth of 0.3H to H from at least one portion so that they do not protrude from the tips of the plate-like vertical ribs of the molds, and the vertical ribs. Reinforcing material is fitted into each of the notches of the adjacent plate-shaped vertical ribs so that both end faces thereof are in contact with the inner wall surfaces of other plate-shaped vertical ribs and / or outer peripheral ribs that are adjacent to the vertical ribs. Then, a method for reinforcing concrete formwork is characterized in that the plate-shaped vertical ribs are connected to each other.