JPH0493437A - Material for driven form - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to concrete pouring formwork for buildings.

(Prior art and invention or problem to be solved) Conventionally, plywood was used as a formwork for pouring concrete in buildings, which required removal after the concrete hardened, and plywood was used for pouring without requiring removal. There is also concrete cast formwork (also called permanent formwork) that is integrated with concrete. Recently, thin-walled driving forms made of high-strength mortar have also come into use.

However, according to the conventional plywood formwork, it is necessary to demold the formwork after concrete is poured, and it is also necessary to dispose of the remaining materials discharged during demolding.

In addition, among the conventional pouring formworks mentioned above, those using concrete with normal bending strength have a thickness of at least 50 m.
m+, it is heavy, requires a large crane, is disadvantageous in terms of structure, and is often not recognized as a frame, and the cross-sectional area of the formwork becomes wider, so it is less expensive in terms of floor space. It will be disadvantageous. Furthermore, it is difficult to use it at small and medium-sized sites where large cranes cannot be installed.

The molds made of high-strength mortar that have been used in recent years have been developed to solve the above-mentioned problems, or they have the following problems. Firstly,
The dimensions of beams and columns often differ depending on the specifications of the building, and when creating an integrally molded product with a U-shaped cross section in a factory, as in the past, there is a tendency for the number of formworks to be larger than necessary. .

Therefore, as shown in FIG.
It consists of a member 31 and a second member 32 whose both sides are abutted at a stepped joint 34.35 between the left and right first members 31.31, and a nut embedded in the stepped joint 34 of the first member 31. 3
6, a structure has been developed in which the first member 31 and the second member 32 are connected by screwing together a bolt 37 inserted into the second member 32. However, in this structure, the first member 31 and second member 3
2 are directly connected by the bolt 37 and nut 36, so the 1st. 5 to l in the longitudinal direction of the second member 31.32
O holes all need to match exactly, requiring extreme dimensional accuracy, and the stepped joint 34.3
5 requires high surface precision for engagement, and the angle is determined by the surface precision, which is difficult to manufacture.Also, due to the presence of the stepped joints 34 and 35, the convergence W is large. Become.

Because such assembly precision is required, if the tapped holes, bolt insertion holes, or stepped joints 34 or 35 do not fit, various correction jigs are required, so this correction must be done on site. Because it is difficult to carry out the process, it may be necessary to assemble various correction jigs in a factory where it is easy to prepare before transporting the product to the site, which may make it impossible to achieve the initial purpose of transporting and storing the product separately. I'm coming.

Therefore, as shown in the perspective view of FIG.
A hinge member 38 having a bottle hole is integrally provided to the second member 32, and a connecting member 39 having a bottle hole is fitted into a recessed portion of the hinge member 38.
Insert the common pin 40 into the 1st bottle hole. Although a structure for connecting the second members 31 and 32 was developed, there were problems in that the structure was complicated and expensive.

Moreover, as shown in FIG. Second member 31.3
Is it possible to provide grooves 41 and 42 that are enlarged internally in the butting portions of the two, and insert connecting rods 43 whose cross-sections are enlarged at both ends into these grooves 41 and 42 to connect the two, for example, 4 m? The long first one, which spans the length of . Second member 31
．． Since the connecting rod 43 of the same length must be inserted into the connecting rod 32, there is a problem in that the assembly work is difficult.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide a member for M411, which is advantageous in terms of storage and assembly, and which can be manufactured at low cost.

(Means for Solving the Problems) In order to achieve the above object, the present invention uses ceramic materials to
A plurality of female metal fittings formed into a plate shape with a thickness of 20 cm ± 10 mm and having tapped holes are embedded along the longitudinal direction of the plate material in the sides of the plate material to form a joining metal fitting. The structure is characterized in that the plate-like members are connected to each other by inserting a male metal fitting having a male threaded portion into an elongated hole provided in the plate and screwing it into the female metal fitting.

In the present invention, the plate material preferably has a bending strength of 100 kg/cm or more in order to withstand external forces during transportation, installation, and concrete pouring, and such a member can be formed by conventional extrusion molding. those manufactured in
Alternatively, a thermosetting melamine resin is mixed with water into a composition containing cement, fine silica, and a water reducing agent, thoroughly stirred with a mixer until it becomes highly viscous, and then molded by extrusion or pouring. Occasionally,
It is preferable that the female metal fitting is embedded and made of a high-strength cement-based secondary member obtained by curing treatment.

Further, in the present invention, it is preferable that the female metal fitting has a flange for preventing removal, and it is further preferable that the male metal fitting has a structure in which the male metal fitting is screwed together from the inside and outside.

(Function) The present invention has the above-described structure, and it is easy to insert a male metal fitting such as a bolt into the elongated hole of the coupling metal fitting and screw it into a female metal fitting embedded in the plate-like material. Therefore, it can be stored and transported in the form of a plate. In the case of coupling fittings or L ankles, the plate materials are assembled in a U-shape and can be used as formwork for constructing beams, and can also be used as formwork for constructing columns with this U-shaped assembly. By holding it in place, it can be used as a formwork for constructing columns.

Furthermore, by using a cement-based secondary member with a bending strength of 100 kg/cm or more,
The thickness of the plate material can be easily set to the above dimensions, and a thermosetting melamine resin is mixed with water into a composition containing cement, fine silica, and a water reducing agent, and the mixture is mixed with a mixer until a high viscosity is obtained. By using a high-strength cement-based secondary member obtained by sufficiently stirring, extruding or pouring, and heat-treating, the above-mentioned bending strength can be easily obtained.

Furthermore, in the present invention, by providing the female metal fitting with a flange, the female metal fitting is firmly fixed within the plate-like material.

In addition, by creating a structure that allows bolts to be screwed into the tapped holes of the female metal fittings from both the inside and outside of the plate material, it is possible to use the The external part is used as a bolt hole when joining metal fittings or two U-shaped pieces together. Also,
It becomes possible to connect plate-shaped materials in parallel so as to form the same plane using flat coupling fittings and use them as wall-constituting members.

(Example) Fig. 1 is a plan view showing an embodiment of the present invention in the case of constructing a column, Fig. 2 is a horizontal sectional view showing the joining part of the plate-like material, and Fig. 3 is a plan view of the case where the plate-like material is constructed. FIG. 4 is an exploded perspective view of the joint, and FIG. 5 is a perspective view of the female metal fitting. 1 and 2 are plate-shaped materials made of ceramic material and combined into a U-shaped formwork.

As disclosed in JP-A-62-182144, these plate-shaped materials 1 and 2 are made of a hydraulic aerogenous powder such as Portland cement, or an aggregate or other compounding material added to the hydraulic aerogenous powder. When adding and kneading, thermally cross-linked melamine resin is added and mixed with water, thoroughly kneaded until it becomes highly viscous, molded, and then heat treated. It is made into molecules to increase its strength. Further, by using an appropriate catalyst, polymerization can be obtained even at temperatures close to room temperature.

Examples of the melamine resin include methylol melamine, methyl etherified melamine resin, etc., and polar groups of these resins include methylol group, methoxy group, methylene ether group, etc. In order to react and polymerize these, it is generally preferable to use a heating temperature of 130°C to 180°C, and in order to carry out such a polymerization reaction smoothly, it is necessary to use a catalyst such as Accelerate the reaction by adding one or more of naphthalenesulfonic acid, dodecylbenzenesulfonic acid, paratoluenesulfonic acid or amine salt, butanol ester of phosphoric acid, butanol ester of 2-tetrachlorostallic acid, and inorganic salts, etc. In other words, it can be appropriately polymerized by heat treatment at room temperature or above.

Regarding the addition amount of the above-mentioned thermally crosslinkable melamine resin, in general, bending strength can be improved even at around 0.8%, and a particularly preferable increase in strength is obtained when it is 1% or more, and the same is true for compressive strength. However, the industrially preferred range is 3% or more, where a bending effect of 100 kg/am'' or more can be easily obtained.The upper limit is 30%.
Even if more than 100% of the resin is added, an increase in bending strength or compressive strength commensurate with the increase in the amount of resin cannot be expected.

In addition, when adding and mixing such a melamine resin, if necessary, the molecular weight of the sulfonated melamine resin and the like is 8,000 to 200,000, preferably 10,000.
A mixture of a melamine resin with a high molecular weight of ~150,000 and a water-soluble melamine resin with a relatively low molecular weight such as methylol melamine, methyl etherified melamine, and variations thereof is used. Melamine resin, which has a high molecular weight, is made into a polymer by ionic bonding between divalent cations such as calcium in cement and sulfonic acid in melamine resin, and water-soluble melamine resin itself or fills the voids and improves the structure of the molded part. Aim for elaboration. In this case, in order to reduce the unit amount of water, it is preferable to use a water reducing agent such as a formalin condensate of melamine or sodium naphthalene sulfonate.

As compounding agents such as aggregates, those commonly used as fine aggregates such as fine silica have been widely used, and as fiber materials such as carbon fibers that are It is possible to use a material that does not deteriorate in quality, or in the case where a catalyst or the like is used as described above, a material with even lower heat resistance can be used. Furthermore, a polymer resin such as an acrylic emulsion may be mixed.)

When molding these plate materials l, 2, a female metal fitting 3 having a tapped hole 3a is inserted in advance as shown in FIG. (In this example, both sides)
5. A plurality of wire nets 8 (not necessarily required) are buried inside the plate material 1.2 along the longitudinal direction. Note that the female metal fitting 3 of this embodiment is constructed by welding a reinforcing plate 4 together with the female metal fitting 3 to form a plate material 1.2.
The reinforcing plate 4 is not necessarily required, as long as it is buried in the inner surface of the plate materials 1 and 2 so that the plate surface is exposed so as not to protrude from the plate surface.

5 is a connecting metal fitting consisting of an angle, and the connecting metal fitting 5
Elongated holes 5a and 5b are provided in each of the perpendicular surfaces, each facing 90 degrees. And both plate-shaped materials l
, 2 has a structure in which a male fitting 6 having a male thread, such as a bolt or screw, is inserted into the elongated holes 5a and 5b of the coupling fitting 5 via a washer 7, and is connected to the female fitting 3 by screwing it. .

When the plate materials 1.2 having such a structure are stored in a factory, transported, and stocked at a site, they are kept in the plate shape and stored and transported in a stacked state. When used as a formwork for forming columns at the site, the plate materials 1 and 2 are assembled into a U-shape using a coupling fitting 5, a female fitting 3, and a male fitting 6, as shown in Fig. 1. Two sets of reinforcing bars 9 have been installed in advance.
Or holding the steel frame and connecting metal fittings 10 and bolts 11
The building will be integrated with concrete and concrete will be poured inside. Second
The figure shows the state after concrete 12 is poured.

With this combination structure, plate materials 1 and 2 of various sizes are prepared, and by combining them according to the specifications of the building, it is possible to create a driving mold with various vertical and horizontal dimensions. You can get a frame. During construction, metal fixing bands are tightened around the formwork before concrete is poured. When the concrete is placed, the male fitting 6 serves as an anchor and has the effect of increasing the bonding strength between the concrete 12 and the plate materials 1 and 2. Also,
In this joint structure, since there is no stepped joint, the radiation W (see Figure 2) can be easily suppressed to within the above 20 mm ± 10 m5, and the strength required during concrete pouring is higher than necessary. There is no need to increase the thickness W.

Incidentally, irregularities may be formed on the concrete casting surfaces of these plate materials 1 and 2 to strengthen the bonding strength with the concrete frame.

When applying this member to a beam, a formwork is formed by forming the plate materials 1 and 2 into a U-shape (in this case, 2).

The left and right plate materials 2 are wider than or equal to the width of the plate material 1), with the opening facing upward, and fixed by fitting them from below into the reinforcing bars that are installed horizontally. Place concrete. Moreover, instead of using an L-shaped coupling fitting 5, as shown in the exploded perspective view of FIG. 6 and the perspective view of FIG.
14a and 14b are elongated holes provided in perpendicular directions), it can also be used as a wall formwork for constructing the wall of a building.

The connecting structure of the plate materials 1 and 2 is as shown in the exploded perspective view of FIG. 8 and the sectional view of FIG. 9.
Is it conceivable to fix a metal fitting 16 having a hole 15 in the hole 15 in the hole 15 and tighten it by inserting the bolt 17 into the hole 15 and screwing it onto the nut 18? The bolts 17 and nuts 18 that are to be inserted into the plate material 1.2, which are 1 m in length or more than 4 m in length, must be moved and tightened with both hands, which makes the work difficult. Become. - As in the strength wood invention, the male fitting 6 such as a bolt is connected only from one side through the elongated hole 5a of the joining fitting 5.
, 5b and screwing them into the female metal fitting 3 can be done easily by having a worker enter the plate-shaped material 1.2 assembled in a U-shape and perform the screwing operation.

FIG. 1O shows another embodiment of the present invention, in which a collar 1 is attached to a female fitting 3.
By integrally providing 9 by welding etc., the female metal fitting 3
The female metal fittings 3 are firmly connected to the plate-like materials 1 and 2 to prevent them from easily detaching from the plate-like materials 1 and 2.

FIG. 11 shows still another embodiment of the present invention, which has a flange 19 as a female metal fitting 3A, and plate-like materials l, 2.
This is an example in which the male metal fitting 5 is screwed in from both the inner and outer sides of the ring. According to this embodiment, this female metal fitting 3A is used not only for connecting the plate-shaped materials 1 and 2, but also as a female metal fitting for screwing together the bolt 11 inserted into the connecting metal fitting 10 shown in FIG. Because it is possible, a common or the same mounting as the female fitting can be used in the structure, making it more economical,
Ease of manufacturing will be achieved.

Various changes and additions may be made to the specific shapes, structures, mutual combinations, etc. of the plate materials, male and female metal fittings, and coupling metal fittings to the force described above with reference to the embodiments, without departing from the gist of the present invention. It goes without saying that a force of 1 is possible.Furthermore, if necessary, an adhesive may be used in conjunction with the bonding surfaces of the plate-like materials.

(Effects of the Invention) According to claim 1, female metal fittings are separately buried in the plate-like materials to be joined, and a male metal fitting such as a bolt, etc., is inserted into a long hole provided in the joining metal fitting. The following effects can be obtained by joining plate materials using metal fittings.

(1) It is possible to easily make fine adjustments during assembly'b), and high ν1 accuracy is not required for setting the buried position of the female metal fitting, and the joining metal fitting is bent at a certain angle such as a 5L angle. When joining using the joining fittings, the angle of joining is regulated by the joining fittings, so there is no need for surface accuracy of the plate material itself, which is required when providing a stepped joining part, and manufacturing is facilitated.

(2) Furthermore, since assembly work is extremely easy, assembly at a construction site is possible. This will bring about the following dramatic economic effects.

Firstly, since it is transported by board, transport efficiency is significantly improved.

Second, it requires significantly less storage space on-site.

Third, if something is integrally molded in a factory, if it breaks, there is no way to repair it other than taking it back to the factory, or in the case of the present invention, even if a part of the plate material is damaged, only that plate can be replaced. You can use it without any problem.

(3) The connection part where the external force is most concentrated is the strongest structurally, making it possible to create a formwork with great strength as a whole. Also, since it acts as a male fitting or anchor, the bond strength with concrete is also increased. Becomes large.

(4) By using flat plate-shaped coupling fittings, it can also be used for wall formwork, expanding the range of uses.

(5) By preparing plate materials of various sizes and combining them, cast formwork of various sizes and shapes can be constructed, so U-shaped members can be created according to the specifications of the building. Compared to the conventional technology, the number of types of molds can be reduced, manufacturing equipment can be simplified, and it is advantageous in terms of management. Furthermore, since the individual members can be made smaller, it is possible to manufacture them by compression molding, which makes manufacturing easier, and the synergistic effect with the above (1) results in a reduction in cost.

(6) Furthermore, it does not require stepped joints and is lightweight due to its thin walls, and can be installed even with a small crane, making it suitable for small and medium-sized sites.

According to claim 2, by using a plate material having a bending strength of 100 kg/cm2 or more, the thickness of the member can be easily set to the above dimensions, and the plate material can be made thinner and has high strength. It can be easily obtained.

According to claim 3, the bending strength and compressive strength are 3 to 4 compared to the conventional one.
Formwork members with twice the strength can be easily obtained.

According to claim 4, the joint strength of the female metal fitting to the plate material is increased by the flange integrated with the female metal fitting, and the attachment strength is increased.

According to claim 5, since the structure is such that the female fitting can be screwed into the male fitting from both the inside and outside directions, it not only serves to insert the male fitting from the inside and connect the female fitting, but also to insert the male fitting from the outside during construction. It is also used when joining frames together, and because the same female metal fittings are used in the same structure, economy and ease of manufacture can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the formwork according to the present invention for corporate use, Fig. 2 is a horizontal sectional view showing a part of the embodiment, and Fig. 3 is a board of the embodiment. FIG. 4 is an exploded perspective view of the embodiment, and FIG.
The figure is a perspective view of the female fitting in this embodiment, FIG. 6 is an exploded perspective view of a joint when this embodiment is used for a wall formwork, and FIG.
The figure is a perspective view showing the assembled state of the wall formwork shown in FIG. 6, and FIGS. 8 and 9 are an exploded perspective view Σ and a plan sectional view showing an approximate structure of the present invention for comparison with the present invention, respectively. , 1O, and 11 are horizontal sectional views showing other embodiments of the present invention, FIG. 12 is a perspective view of a formwork previously developed by the inventors, and FIGS. 13 and 14 are horizontal sectional views showing other embodiments of the present invention. each first
FIG. 2 is a perspective view and a plan view of a formwork joint part showing an alternative to FIG. 2; 1.2: Plate material, 3.3A: Female metal fitting, 3a: Drilled hole, 4
．． Reinforcement plate, 5: Joining metal fittings, 5a, 5b: Elongated holes, 6. Male metal fitting, 8 wire net, 9: reinforcing bar, 10: joining metal fitting, 1
1: bolt, 12: concrete, 14: joining metal fittings, 1
6: Metal fittings, 17 bolts, 18: Nuts, 19: Tsuba Patent applicant Tostem Sera Co., Ltd.

Claims (1)

[Scope of Claims] 1.Mold from ceramic material into a plate shape with a thickness of 20mm±10mm, and a female metal fitting having a screw hole is attached to the side of the plate-shaped material along the longitudinal direction of the plate-shaped material. It has a structure in which the plate-shaped materials are connected to each other by burying a plurality of them along the direction, and inserting a male metal fitting having a male thread into an elongated hole provided in the connecting metal fitting and screwing it into the female metal fitting. Characteristic components for driving formwork. 2. In claim 1, the bending strength of the plate material is 100
A member for driving formwork, characterized in that it has a weight of kg/cm^2 or more. 3. In claim 1 or 2, a thermosetting melamine resin is mixed with water into a composition containing cement, fine silica, and a water reducing agent, sufficiently stirred with a mixer until high viscosity is generated, and then extruded or poured. A member for a driving formwork, characterized in that it is a high-strength cement-based secondary member obtained by molding, embedding the female metal fitting during the molding, and curing. 4. The member for a driving formwork according to any one of claims 1 to 3, wherein the female metal fitting has a retaining collar. 5. The member for a driving formwork according to any one of claims 1 to 4, characterized in that the screw hole of the female metal fitting has a structure that can be screwed into the plate material from the front and back surfaces.