JP3772229B2 - Connection structure of corners of formwork members - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, a concrete decorative wall surface to which a large number of decorative pieces such as tiles are fixed is applied in such a manner that the decorative piece is temporarily fixed to the inner surface of the formwork member and concrete is placed on the inner surface side of the formwork member. In particular, the present invention relates to a connecting structure of corner portions of a mold member that connects a mold member made of a synthetic resin foam at a predetermined angle at a construction portion of a wall surface corner portion.
[0002]
[Prior art]
As a method for constructing a concrete decorative wall surface to which a large number of decorative pieces such as tiles are fixed, for example, in the method disclosed in Japanese Patent Publication No. Sho 62-24589, a number of concave portions for fitting decorative pieces are formed in a synthetic resin foam. The synthetic resin foam is fixed to a plywood or the like to form a mold frame, and a large number of decorative pieces are temporarily fixed to the inner surface of the mold frame in a manner to be fitted into the decorative piece fitting recesses, and the concrete is placed inside the mold frame. A large number of decorative pieces are fixed to the concrete surface.
[0003]
[Problems to be solved by the invention]
In the construction method described above, a large number of decorative pieces can be efficiently fixed to the concrete surface, but the synthetic resin foam needs to be soft to some extent in order to temporarily fix the decorative piece. When is used as a mold as it is, the synthetic resin foam is deformed in a manner that the synthetic resin foam warps to the outside by tightening the mold at the corner of the wall surface. Therefore, in the construction method described above, the synthetic resin foam is fixed to a plywood or the like to ensure rigidity. However, in this case, the efficiency of assembling and demolding of the formwork is poor, and the synthetic resin foam is used at the time of demolding. There were problems such as the body being easily damaged and difficult to reuse.
[0004]
In view of such a conventional problem, the present invention provides a formwork that can suitably hold a formwork member made of a synthetic resin foam, without fixing it to a plywood or the like, at a construction portion of a concrete wall corner. The object is to provide a connecting structure of the corner portions of the members.
[0005]
[Means for Solving the Problems]
The feature of the present invention for solving the conventional problems as described above and achieving the intended purpose is made of a synthetic resin foam, and has a large number of recesses for fitting decorative pieces on the inner surface. When adjoining a formwork made of a combination of formwork members, such as tiles, with the backside exposed to the mold surface and temporarily held, and adjacent to each other with an angle, they are adjacent to each other with an angle. A pair of formwork outer surface holding pieces that have two formwork member end face contact surfaces with which the joining end faces of the formwork members are in contact with each other at a predetermined angle and are adjacent to each other on the end outer surface side of the both formwork members Are used, and each mold frame outer surface holding piece has a mold part engaging part integrally formed thereon, and the molds are adjacent to each other at the end face contact surface of each mold form. The end face of the frame member on the corner of the wall body is brought into contact with each other, and each of the above-mentioned formwork engaging parts is connected to the formwork member. In that fitted to the connector engaging portion formed on the surface.
[0006]
In addition, it is preferable that the corner | angular part connector is shape | molded by the fiber reinforced synthetic resin material (FRP), and the outer surface side of a formwork member is hold | maintained on the outer surface of each formwork outer surface holding piece of a corner | angular part connector. It is preferable that the reinforcing protrusion having the same protruding height as the vertical end thicker is integrally provided. Further, the mold member, polyolefin resin foam compressive stress is 0.5~8.0kgf / cm ² at 10% strain, preferably polypropylene-based resin foam 1.0~6.0kgf / cm ² Preferably it consists of.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. In the drawing, reference numeral 30 denotes a corner connector, and the corner connector 30 is an outer mold frame formed by assembling block-shaped mold members 10, 10. When installed next to each other at a predetermined angle (for example, vertically) at the construction site, they are mounted on the outer surface side (the side opposite to the concrete placement side) of the mold members 10 and 10 on both sides, It is designed to prevent outward deformation.
[0008]
The corner connector 30 is formed of a rigid material such as a fiber reinforced synthetic resin material (FRP), and as shown in FIG. 1, holds the mold end face projecting in a mountain shape toward the inner surface side (concrete placement side). It consists of a part 31 and two formwork outer surface holding pieces 34 and 34 integrally formed so as to protrude from the formwork end face holding part 31 to both sides. And on the inner surface side of the formwork end face holding part 31, two formwork end faces adjacent to each other at a predetermined angle (for example, perpendicularly) corresponding to the angle of the concrete wall body corner and the side end face of the formwork member 10 Contact surfaces 32 and 32 are formed, and the inner surface side of each mold frame outer surface holding piece 34 is at an angle corresponding to the angle of the side end surface of the mold member 10 with respect to the mold end surface contact surface 32 ( Adjacent formwork outer surface abutment surfaces 35 are formed (eg vertically).
[0009]
Further, on the inner surface side of the mold outer surface holding piece 34, mold frame engaging portions 37, 37... Correspond to outer surface side connector engaging portions (described later) of the mold member 10, corresponding to the outer surface of the mold frame. A convex shape protruding from the contact surface 35 is integrally formed. Further, a longitudinally elongated reinforcing protrusion 38 is integrally formed on the outside of the outer frame holding piece 34 so as to protrude at a height corresponding to the thickness of a vertical end thick 71 (described later). The thickness of the corner connector 30 (the distance between the outer surface of the formwork outer surface abutment 35 and the outer surface of the reinforcing protrusion 38) is substantially the same as the thickness of the thick vertical end 71.
[0010]
In the figure, reference numerals 10, 10... Are mold members constituting the outer mold, and temporarily hold a large number of tiles 5, 5... As an example of a decorative piece, and a large number of tiles 5 on the surface of the concrete wall. 5 ... are fixed.
[0011]
The mold member 10 has a polyolefin resin foam and is integrally molded into a horizontally flat block-shaped block (thick plate). The molded polyolefin resin foam has a 10% strain. The compressive stress is 0.5 to 8.0 kgf / cm ² . The polyolefin resin foam is particularly preferably a polypropylene resin foam, and the compressive stress at 10% strain is preferably 1.0 to 6.0 kgf / cm ² .
[0012]
When the compressive stress at the time of 10% strain of the polyolefin resin foam after molding is less than 0.5 kgf / cm ² , the formwork member 10 is likely to be compressed and deformed by concrete placement, and the concrete wall surface swells and forms. Or the joint finishing recesses between the tiles 5, 5... Are not formed to a sufficient depth. On the other hand, if the compressive stress at the time of 10% strain exceeds 8.0 kgf / cm ² , the formwork member 10 becomes too hard, and the tiles 5, 11. (Temporary fixing) There is a possibility that troubles may occur in the work, or the tile 5 that has been temporarily fixed without the impact being sufficiently absorbed against the collision of the end pieces 71, 71. . Furthermore, if it deviates from this range, the mold member 10 is likely to be damaged when the mold is removed, making it difficult to reuse.
[0013]
In addition, in order to obtain the compressive stress at the time of 10% strain, the compressive stress is applied by applying a load to the test piece at a load speed of 10 mm / min according to the static compression test method (Method A) of JIS Z 0234. Is measured, a stress-strain diagram is created from the measurement results, and read from the diagram. At this time, as the test pieces, those having a length and width of 30 ± 1 mm and a thickness of 15 ± 1 mm cut out from the flat portion of the tile fitting recess 11 of the mold member 10 are used.
[0014]
As shown in FIG. 2 to FIG. 4, the mold member 10 has a large number of rectangular fitting recesses 11, 11 (recesses for fitting decorative pieces) on the inner surface side (concrete placement side), They are arranged vertically and horizontally in a grid pattern. In addition, on the outer peripheral end surface of the mold member 10, a large number of recesses for engagement 13, 13,... And protrusions for engagement 14, 14,. It is provided in a corresponding arrangement so as to be fitted to and prevent misalignment. Further, on the outer surface side of the mold member 10 (on the side opposite to the concrete placement side), vertical and horizontal grid-like reinforcing projections 16 are provided in order to ensure rigidity as a concrete mold and reduce the weight. The concave portion surrounded by the reinforcing convex portion 16 constitutes a connector engaging portion into which the formwork engaging portions 37, 37... Of the corner connector 30 are fitted.
[0015]
As shown in FIG. 5, such a plurality of mold members 10, 10... Are abutted against the outer peripheral end faces so that the engaging recesses 13, 13. In addition, the adjacent formwork members 10, 10 are sandwiched by the plate-like coupling members 20, 20... Having a U-shaped cross section at the frame-like peripheral portions of the reinforcing convex portions 16, 16. And then connect them together to assemble the outer formwork. In addition, the mutual connection of the mold members 10 and 10 is performed by sticking an adhesive tape or the like across the peripheral portions of the reinforcing convex portions 16 and 16, or by attaching a wire or the like to the reinforcing convex portions 16 or both of them. It is possible to go through 16 and bind it.
[0016]
And in the construction location of a concrete wall body corner | angular part, as shown in FIG. 6, the outer surface side (concrete placement) of the both side formwork members 10 and 10 arrange | positioned adjacent by a predetermined angle (for example, perpendicularly) The corner connecting tool 30 is attached to the opposite side), and the mold members 10 and 10 on both sides are connected to each other so as to maintain a predetermined angle via the corner connecting tool 30, and these It supports so that the connection side edge part of the formwork members 10 and 10 may not deform | transform outside.
[0017]
That is, the corner connector 30 causes the mold frame end surface abutting surfaces 32 and 32 to abut on the side end surfaces of the mold members 10 and 10, and the mold outer surface abutment surfaces 35 and 35 of the mold frame members 10 and 10. It is made to contact | abut on an outer surface, and it is made to fit the formwork engagement parts 37 and 37 ... in the recessed part (connector engagement part) enclosed by the convex parts 16 and 16 for reinforcement of the formwork members 10 and 10, It can be easily mounted on the outer surface side of the formwork members 10 and 10 on both sides of the corner construction place. The engaging convex portions 14, 14... On the side end surfaces of the mold member 10, 10 that abut on the mold end surface abutting surfaces 32, 32 are cut away.
[0018]
In this way, by arranging the block-shaped formwork members 10, 10 ... vertically and horizontally and connecting them to each other, it is possible to suitably arrange a large number of temporarily fixed tiles 5, 5 ... without fixing them to a plywood or the like. Therefore, the rigidity as a concrete formwork can be ensured, and the operation becomes easier as compared with the case of fixing to a plywood or the like. Further, the mold member 10 made of polyolefin resin foam can be easily cut according to the size of the wall surface.
[0019]
Further, as shown in FIG. 7, separators 60 are respectively attached to the inner side (concrete placement side) of the outer mold frame composed of the mold frame members 10, 10. It is mounted via tools 61 and 62 and foam ties 63 and 66. The foam tie 66 protrudes to the outer side of the outer mold (on the side opposite to the concrete placing side) and supports the lateral end thick 73, 73 (described later). The mounting of the separator 60 is performed by opening a through hole 19 in an arbitrary through hole forming recess 18 of the mold member 10 and inserting a connecting rod 65 into the through hole 19.
[0020]
As shown in FIG. 8, a plurality of longitudinally long vertical ends made of square steel pipes are provided on the outer surface side (the side opposite to the concrete placing side) of the outer mold frame made of the mold members 10, 10,. .. Are installed at predetermined intervals in the horizontal direction (left and right) so as to contact the outer surface of the mold members 10, 10. 71 is temporarily fixed. The temporary fixing device 25 includes a U-shaped holding portion 27 that holds the vertical end thick 71, and hook upper portions 28 and 28 that are pierced in a lateral portion of the reinforcing convex portion 16 of the mold member 10. Yes. The temporary fixing between the mold member 10 and the vertical end thick 71 may be performed by passing a wire or the like through the reinforcing convex portion 16 of the mold member 10 and hanging around the vertical end thick 71.
[0021]
Next, a plurality of laterally elongated horizontal pipes made of round steel pipes, etc. are provided on the outer sides (opposite to the concrete placement side) of the vertical end thick 71, 71... As shown in FIG. 9, the end thicknesses 73, 73... Are fixed to a farm tie 66 mounted on the outer surface side of the mold member 10 via mounting brackets 68 and nuts 69 in the vertical direction (up and down). It installs so that it may contact | abut to the vertical end thick 71,71 ... and the reinforcement protrusions 38 and 38 at predetermined intervals.
[0022]
And in the construction location of a concrete wall body corner | angular part, as shown in FIG. 10, lateral end thick 73, 73 ... and the edge part are predetermined | prescribed at the outer side of the outer mold frame of the both sides adjoined at a predetermined angle. It is installed so as to protrude in a direction that intersects at an angle (difficulty), and the corner fasteners 40 can be opened at the ends of the lateral end thick 73, 73... The end portions of the lateral end thick 73, 73... Are inserted through the plurality of lateral end thick through holes 43, 43.
[0023]
Then, tension members 75, 75 such as wires are connected to the corner fastening tool 40, and the tension members 75, 75 are pulled laterally from both sides of the corner construction site, and the corner fastening tool 40 is used. The lateral end thicknesses 73, 73... On both sides are pressed inward (concrete placement side) to tighten the mold. At this time, since the corner connector 30 made of a rigid material is attached to the outside of the corner of the outer mold, it is preferable that the mold members 10, 10. Can be prevented.
[0024]
After tightening the formwork in this way, concrete is placed in the concrete placement space between the outer formwork made of the formwork member 10 and the inner formwork made of the heat insulating panel 1. When the concrete is hardened, the tiles 5, 5... Temporarily fixed to the mold members 10, 10... Are fixed to the outer surface of the concrete wall, and the heat insulating panel 1 is integrated with the concrete wall. To do.
[0025]
After the concrete is hardened, the corner fasteners 40 and the like are removed, the horizontal end thick 73, 73... And the vertical end thick 71, 71... Are removed, and the formwork members 10, 10. 20, 20,... Are removed, and the outer mold frame composed of the mold members 10, 10. In addition, the corner | angular_part coupling tool 30 only fits the formwork engagement parts 37, 37 ... in the connection tool engagement part (concave part enclosed by the reinforcement convex part 16) of the formwork member 10. FIG. Therefore, it can be easily removed and reused.
[0026]
At the time of demolding, the mold member 10 is made of a polyolefin-based resin foam, so that it can be easily peeled off from the surface of the concrete wall, and the plurality of mold members 10, 10,... Since the end faces are only engaged through the engaging convex portions 14, 14..., The adjacent mold members 10, 10... Can be easily separated, and the mold members 10, 10. Individually, it can be peeled off by a relatively small area (relative to the entire outer formwork). Therefore, damage to the mold member 10, particularly damage to the convex portion (joint forming portion) between the tile fitting recesses 11, 11... Can be suitably prevented, and the mold member 10 can be suitably reused. Can do.
[0027]
In the above-described embodiment, the corner end fastening tool 40 is mounted across the ends of the lateral end thick 73, 73... On both sides of the corner construction place, and the lateral end thick 73, 73. As shown in FIG. 11, as shown in FIG. 11, on the outside of the ends of the lateral end thick 73, 73... On the both sides, a vertically long corner fastening member 79 made of a round steel pipe or the like. Are placed in contact with each other, and tension members 75, 75 are connected to the corner fastening member 79 and pulled from both sides, and the lateral end thick 73, 73... The formwork may be tightened by pressing.
[0028]
【The invention's effect】
As described above, the present invention can be provided by simply mounting the formwork member by fitting the corner connector to the outside of the formwork members on both sides adjacent to each other at a predetermined angle at the corner of the concrete wall. It can be connected suitably, and a deformation | transformation of the formwork member which consists of a synthetic resin foam by clamping of a formwork can be prevented suitably. Accordingly, a mold member made of a lightweight synthetic resin foam can be used as it is without being fixed to a plywood or the like, and assembly and demolding of the mold can be facilitated.
[0029]
In addition, by forming the corner connector with a lightweight fiber-reinforced synthetic resin material (FRP), the formwork members can be suitably connected without impairing the effect of reducing the weight of the formwork. Moreover, a form | mold can be clamp | tightened suitably by integrally providing a reinforcement protrusion on the outer surface side of a corner | angular part coupling tool.
[0030]
Further, the mold member is made of a polyolefin resin foam having a compressive stress of 0.5 to 8.0 kgf / cm ² at 10% strain, and preferably a polypropylene resin foam having 1.0 to 6.0 kgf / cm ^2. By being formed, the decorative piece can be suitably temporarily fixed and can be easily peeled off from the concrete surface.
[Brief description of the drawings]
FIG. 1 is a perspective view of a corner connector.
FIG. 2 is a front view of a mold member constituting an outer mold.
FIG. 3 is a rear view of a formwork member.
4 is a longitudinal sectional view taken along line AA in FIG. 2. FIG.
FIG. 5 is a rear view showing an assembled state of an outer mold made of a mold member.
FIG. 6 is a cross-sectional view showing a connection state of the formwork members on both sides of the corner portion of the concrete wall by the corner connector.
FIG. 7 is a cross-sectional view showing a state where the farm tie is attached to the outer mold.
FIG. 8 is a cross-sectional view showing a state in which a thick vertical end is installed on the outside of the outer mold.
FIG. 9 is a vertical cross-sectional view showing a state in which the horizontal end thick is set on the outside of the vertical end thick.
FIG. 10 is a cross-sectional view showing a tightening state of a mold at a corner portion of a concrete wall.
FIG. 11 is a cross-sectional view showing another example of a fastening state of a formwork at a corner portion of a concrete wall.
[Explanation of symbols]
1 Insulation panel (inner form)
5 tiles (decorative pieces)
10 Formwork member (outer formwork)
11 Tile fitting recess (decoration fitting fitting recess)
13 Engaging concave portion 14 Engaging convex portion 16 Reinforcing convex portion 18 Through-hole forming concave portion 19 Through-hole 20 Connecting tool 25 Temporary fastener 27 Holding portion 28 Hook-shaped portion 30 Corner portion connecting tool 31 Mold frame end surface holding portion 32 End surface abutting surface 34 Mold frame outer surface holding piece 35 Outer surface abutting surface 37 Mold frame engaging portion 38 Reinforcing ridge 40 Corner portion fastening tool 43 Wide end thick through hole 45 Tension material connecting hole 60 Separator 61 Mounting tool 62 Mounting tool 63 Foam tie 65 Connecting rod 66 Foam tie 68 Mounting bracket 69 Nut 71 Thick vertical end 73 Thick horizontal end 75 Tension material 79 Mold frame fastening material

Claims (4)

Formwork member made of a synthetic resin foam, having a large number of decorative pieces fitting recesses on the inner surface, and temporarily holding a number of decorative pieces such as tiles in the concave portions with the back side exposed to the mold surface When adjoining the formwork formed by combining the two at an angle with each other, the two formwork member end surface abutting surfaces where the joining end surfaces of the adjacent formwork members abutting each other at an angle are adjacent to each other with a predetermined angle. A corner having a pair of mold outer surface holding pieces integrally attached to the end outer surface side of the both mold frame members, and having a mold engaging portion integrally with each mold outer surface holding piece. And a wall body corner side end surface of a mold member adjacent to the mold frame end surface abutting surface of the corner connector, and the mold engaging portions are connected to the mold frame. The connection structure of the corner part of a formwork member formed by fitting in the connector engaging part formed in the outer surface of a member. The corner structure coupling structure according to claim 1, wherein the corner coupling tool is formed of a fiber reinforced synthetic resin material (FRP). The mold according to claim 1 or 2, wherein a reinforcing protrusion having the same protrusion height as that of the vertical end holding the outer surface side of the mold member is integrally provided on the outer surface of each mold frame outer surface holding piece of the corner connector. Connection structure of frame member corners. The mold member is a polyolefin resin foam having a compressive stress of 0.5 to 8.0 kgf / cm ² at 10% strain, preferably 1.0 to 6.0 kgf /
The connection structure of the corner part of a formwork member according to any one of claims 1 to 3, comprising a cm ² polypropylene resin foam.

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