JP2002106169A - Nut-embedded stiffener for assembling concrete form, and concrete form using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stiffener for use as a bolt hole-bored glazing bar for assembling a concrete form in combination with a nut-embedded plate, which facilitates assembly of a framework not by using metal glazing bars but by using stiffeners, to thereby achieve assembly of the lightweight concrete form in the construction field. SOLUTION: According to the glazing bars for forming the concrete form constituting framework 2, which is fastened to the nut-embedded plate 3 to assemble the concrete form 4, the bars are formed of the wooden stiffener 1, and a nut 12 for fastening the wooden stiffener 1 together to assemble the framework 2 of a predetermined shape, is embedded in an end face 5 of the wooden stiffener 1. Then, a bolt hole 7 to be fastened to the embedded nut in the end face 5 of the wooden stiffener 1 is bored in a side surface 6 of wooden stiffener 1. Further, a suitable number of bolt holes 9 for fastening the framework 2 assembled by fastening the wooden stiffener 1 together and the nut- embedded plate 3 to each other, are bored in an upper surface 8 of the wooden stiffener at predetermined locations. In this manner, the nut-embedded wooden stiffener for assembling the concrete form is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pier for joining a concrete formwork by joining a nut to a synthetic resin molded plate or a plywood embedded with a nut, and a concrete formwork using the same.

[0002]

2. Description of the Related Art Conventionally, concrete casting formwork includes:
Concrete formwork reinforced by nailing wooden piers to the back of plywood has been widely used. However, the concrete formwork with this wooden pier is easy to bend and the dimensional accuracy is low, so when assembling the formwork, misalignment is likely to occur between the adjacent formwork, concrete concrete construction method, concrete There was a problem with the method of attaching the interior cloth directly to the casting surface. Also, concrete forms are damaged more after one or two or three uses, and the entire form must be discarded, resulting in large waste of wood resources.

[0003] The metal concrete formwork has high accuracy and can withstand repeated use, but is expensive and heavy.
The work efficiency of formwork assembly decreases.

[0004] A concrete formwork in which a metal formwork is used instead of a wooden crosspiece and a metal formwork is screwed to a plywood has been used, and there is a difference between forms when assembling the concrete formwork. As a result, the precision of assembling concrete forms has been greatly improved. And if the plywood of the concrete formwork is replaced, the metal frame can be used repeatedly.However, the work of replacing the plywood requires labor and time since it is perforated and screwed to the plywood at the correct position. was there.

[0005] Japanese Patent Publication No. 63-23347 discloses that the above-mentioned metal frame can be easily replaced at a construction site or the like by using a nut embedded plywood for a concrete form in which a nut is embedded in a plywood. did.

Further, the present inventor has filed a patent application No. 24 of 2000.
No. 9039, a nut-embedded synthetic resin concrete mold in which a plurality of nuts are buried at appropriate positions on a synthetic resin plate at predetermined intervals and an end surface of the nut having a screw hole is exposed on one surface of the synthetic resin plate. A frame forming plate has been disclosed.

[0007]

[Problems to be Solved by the Invention] JP-B-63-2334
Conventionally, a nut embedded plywood for a concrete form in which a nut is embedded in a conventional plywood disclosed in No. 7 is mainly fastened with a bolt to a metal beam frame in which bolt holes are previously drilled at predetermined locations to form a concrete form. Used. Further, the metal beam frame is formed by fastening a plurality of metal beams having predetermined holes formed in bolt holes to each other in a predetermined rectangular shape with bolts and nuts. There is a disadvantage that it takes time to transport the plywood or the synthetic resin molded plate embedded with the nut and the crosspiece for the crossframe to the construction site in a separated state before assembling and assemble the concrete formwork at the site.

[0008] The metal cross-frame is heavy and goes against the demand for the reduction of the concrete form. Further, when a concrete form other than the standard size is required, the cross-bar is cut off and the necessary cross-section is cut off. In order to assemble a concrete formwork of dimensions, it is necessary to cut the metal bars, but this has the disadvantage that this is difficult to do on the construction site.

Accordingly, the present invention uses a metal bar as a bar for drilling a bolt hole for a concrete form used in combination with a conventional nut embedding plywood for concrete casting or a nut embedding plate such as a nut embedding synthetic resin molded plate. Without
An object of the present invention is to provide a pier that can easily assemble a pier frame using a wooden pier and assemble a lightweight concrete formwork at a construction site.

[0010]

In order to achieve the above object,
As a result of intensive studies conducted by the present inventors, a wooden pier was used as a drilling hole for a bolt hole for a concrete form used in combination with a nut embedding plywood for concrete casting or a nut embedding synthetic resin molded plate. To pre-drill fastening bolt holes at positions corresponding to the nut embedding positions of the nut embedded plywood or the nut embedded synthetic resin molded plate, and to fasten the crosspieces with each other with bolts to assemble the specified square shaped frame By embedding the nut in a predetermined place and drilling and providing a bolt hole for fastening the bolt in the nut in advance, the nut embedding plywood or the nut embedding synthetic resin molded plate and the wooden pier are separately assembled before assembly. The company found that it was possible to assemble concrete formwork very easily on the site by packing it low in volume and transporting it to the construction site. It was led to the completion.

That is, the present invention relates to a beam forming a concrete formwork frame for fastening a concrete formwork by fastening to a nut embedding plate such as a nut embedding plywood or a nut embedding synthetic resin molded plate. The crosspiece is a wooden crosspiece, and a nut for fastening the crosspieces to each other to assemble a crosspiece having a predetermined shape is embedded in an end face of the crosspiece, and a bolt hole for fastening with the embedded nut at the crosspiece end face is formed. It is characterized in that an appropriate number of bolt holes for fastening the nut embedding plate and the crosspiece assembled by fastening the crosspiece to each other are drilled at predetermined positions on the upper surface of the crosspiece. The gist is a girder with embedded nuts for assembling concrete formwork.

Another object of the present invention is to provide a concrete formwork frame for fastening a concrete formwork by fastening to a nut-embedded plate such as a nut-embedded plywood or a nut-embedded synthetic resin molded plate. A crossbar is a wooden crossbar, and a nut for fastening the crossbars to each other to assemble a crosspiece having a predetermined shape is embedded in an end of the crossbar and a bolt for fastening to a buried nut at the end of the crossboard. A hole is drilled in the side of the crosspiece, and further, a bolt hole for fastening the assembled frame and the nut embedding plate by fastening the crosspiece to each other is drilled at a predetermined position of the crosspiece, thereby embedding the crosspiece and the nut. The gist is a concrete formwork that is fastened to a board.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the contents of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of an example of a nut embedding bar according to the present invention, FIG. 2 is a front view thereof, FIG. 3 is a side view thereof, and FIG. FIG. 5 shows a nut-embedded pier 1 of the present invention.
Frame 2 and nut embedding plate 3 assembled by fastening
Is a plan view, FIG. 6 is a side view, and FIG. 7 is a front view of an example of the concrete formwork 4 formed by fastening the above.

The crosspiece 1 is made of wood, and even if it is solid wood,
Although it may be made of plywood, plywood properties are desirable in terms of shape stability. The crosspiece 1 may be made of a known synthetic wood obtained by molding wood powder or wood pieces together with a binder.

When a plurality of crosspieces 1 are fastened to each other to assemble the crosspiece 2, a fastening nut 12 is embedded in an end face 5 of the crosspiece 1 which is fastened by contacting the side surface of another crosspiece 1. Further, a bolt hole 7 is formed at a corresponding position on the side surface 6 of the crosspiece 1 which is fastened by contacting the end surface 5 of another crosspiece 1. On the upper surface 8 of the crosspiece 1, bolt holes 9 for fastening the crosspiece 2 assembled by fastening the crosspieces 1 to the nut embedding plate 3 are formed at predetermined positions. The bolt hole 7 and the bolt hole 9 are preferably formed with a large diameter from the inlet to a certain depth so as to accommodate the head of the bolt 13, and are formed as two-stage holes.

As shown in FIG. 5, when assembling the crosspiece 1 into the crosspiece frame 2, the nuts 12 embedded in each crosspiece 1 and the bolt holes 9 to be drilled are formed by the crosspieces 1 used at each location.
, The length of the crosspiece 1 and the like are different from each other, but it is necessary to prepare a predetermined number of crosspieces 1 of the combination required for assembling the crossframe 2 necessary for assembling the concrete formwork 4 as a whole. In the pier 1, there is an outer pier 1 of the pier 2 shown in FIG.
As in the case of 0, there is also a crosspiece 1 that does not require the nut 12 to be embedded in the end face 5. Forming bolt holes 11 for fastening the assembled concrete forms 4 to each other on the side surface 6 of the outer crosspiece 10 is convenient for combining a plurality of concrete forms 4 with each other.

The nut 12 used in the molding plate for a concrete mold made of synthetic resin embedded with a nut according to the present invention is preferably formed such that a short projection-like anchor is projected. For example, it is preferable to use a so-called "Onishi nut" for woodwork in which a number of protrusions with sharp tips are provided on the outer periphery of the nut because the bonding strength with the crosspiece 1 is increased.

Further, as a nut used for the nut embedding bar of the present invention, an insert nut having a male screw having a self-tapping function on the outside and a female screw on the inside can be used. Each of the nuts 1 is easily inserted into a predetermined position of the crosspiece 1 by screwing it into a blind hole or a through hole formed at a predetermined position of the crosspiece 1 while cutting the screw with an insert nut having a self-tapping function.
2 can be embedded and securely fixed. In this case, a strong wooden crosspiece 1 is preferably used.

In order to use the nut embedded pier 1 for assembling a concrete formwork of the present invention, as shown in FIGS. 5, 6, 7 and 8, a plurality of piers 1 are fastened to each other by bolts 13. A cross frame 2 is formed, and a nut embedding plate 3 such as a nut embedding synthetic resin molded plate or a nut embedding plywood, in which a nut 12 as shown in FIG.
Are assembled by bolts 13 to assemble the concrete formwork 4.

An arc-shaped comb-shaped pier 1 having a curved surface in contact with the nut embedment plate 3 is used as the nut-embedded pier for assembling the concrete formwork of the present invention. By fastening the bent nut embedding plate 3 to this, the curved concrete formwork 14 can be formed as shown in FIG. At this time, when the nut embedding plate 3 is made of an elastic synthetic resin nut embedding plate 3 having a suitable flexibility or a flexible plywood nut embedding plate 3 such as a parallel plywood, a force is applied to the nut embedding plate 3. By adding, the curvature can be elastically changed in a certain range, and can be attached to a comb-shaped nut embedding pier having a certain range of different curvatures, using a nut embedding pier molded to the same curvature. Thus, curved concrete forms 14 having different curvatures can be produced. Therefore, if the nut embedding plates 3 having different curvatures are manufactured at appropriate intervals, it is possible to cope with the curved concrete formwork 14 having any radius of curvature.

Curved concrete form 1 having a large radius of curvature
In the case of No. 4, a flat nut embedding plate 3 is used as the nut embedding plate 3 without using the curved nut embedding plate 3, and the elasticity of the flat nut embedding plate 3 is used to embed the comb-shaped nut having a small curvature. By fastening to the crosspiece 1 with bolts 13, it is also possible to use it as a slightly curved curved concrete formwork 14. For example, a curved concrete formwork 14 having a curvature radius of 5 m or more can be manufactured by this method.

The above-mentioned curved nut embedding plate 3 is not limited to a cylindrical one having a constant curvature as a whole, but also has an elliptical arc shape, a hyperbolic shape, or any other cross-sectional shape in which the curvature partially changes. It may have a columnar shape. By using a molding die according to a required curved surface, a curved concrete formwork 14 having an arbitrary curved surface can be manufactured.

[0023]

According to the nut embedding pier for assembling a concrete formwork of the present invention, a nut embedding pier in which a nut is embedded accurately at a predetermined location can be manufactured at a factory, and this can be easily performed by fastening bolts. And the nut embedding plate 3 such as a nut embedding plywood or a nut embedding synthetic resin molded plate is fastened to the cross frame 2 to easily assemble the concrete formwork 4. There is no trace of nails or screw heads on the surface of the cast concrete, and a beautiful exposed concrete surface can be obtained. When a cloth or the like is directly attached to the concrete surface, it is not necessary to repair the concrete surface.

If the nut embedding bar of the present invention is combined with a nut embedding plate 3 such as a nut embedding synthetic resin molded plate or a nut embedding plywood and used as a concrete formwork 4, when the concrete formwork 4 is transported to a construction work site. In this case, the members can be transported in a low-bulk state without being fastened to each other, and the concrete formwork 4 can be easily assembled at the work site. If several types of nut embedding piers are prepared, this can be used as a suitable nut embedding plate.
By combining the above, concrete forms 4 of various sizes can be assembled at the construction site.

The concrete form removed after the concrete is cast can be easily disassembled and transported, and the pier 1 is less damaged during disassembly, and the disassembled pier 1 can be reused several times. It can also be diverted for concrete forms 4 of different sizes. In addition, only the damaged part can be replaced, and waste material can be reduced. As a result, it is possible to greatly contribute to resource saving and reduction of construction waste.

Since the nut embedding pier 1 is processed at the factory, the dimensions of the nut embedding pier, the nut embedding position and the position of the bolt hole 7 can be accurately produced, and the nut embedding plate having the nut embedded in the accurate position can be produced. By combining the above, it is possible to assemble a concrete formwork 4 having a uniform specification extremely easily at a construction site.

[Brief description of the drawings]

FIG. 1 is a plan view of an example of a nut embedding bar according to the present invention.

FIG. 2 is a front view of an example of a nut embedding bar according to the present invention.

FIG. 3 is a side view of an example of the nut embedding bar of the present invention.

FIG. 4 is an AA cross-sectional view of an example of a nut-embedded crosspiece of the present invention.

FIG. 5 is a plan view of an example of a concrete formwork configured by fastening a nut frame and a nut embedding plate, which are assembled by fastening nut-embedded crosspieces of the present invention to each other.

FIG. 6 is a front view of an example of a concrete formwork constructed by fastening a nut embedding plate and a nut embedding plate, which are assembled by fastening nut embedding crosspieces of the present invention to each other.

FIG. 7 is a side view of an example of a concrete formwork formed by fastening a nut embedding plate and a nut embedding plate, which are assembled by fastening nut embedding blocks of the present invention to each other.

FIG. 8 is a BB cross-sectional view of an example of a concrete formwork configured by fastening a nut embedding plate and a nut embedding plate by fastening nut embedding piers of the present invention to each other.

FIG. 9 is a plan view of an example of a synthetic resin molded plate embedded with nuts used in the concrete formwork of the present invention.

FIG. 10 is a side cross-sectional view of an example of a curved concrete formwork configured by fastening a nut embedding plate and a beam frame assembled by fastening nut embedding blocks of the present invention to each other.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crosspiece 2 Crosspiece 3 Nut embedding board 4 Concrete form 5 End face 6 Side 7 Bolt hole 8 Top surface 9 Bolt hole 10 Outside crossboard 11 Bolt hole for formwork fastening 12 Nut 13 Bolt 14 Curved concrete formwork

Claims (6)

[Claims] 1. A beam forming a concrete formwork frame for fastening a concrete formwork by fastening to a nut embedding plate such as a nut embedding plywood or a nut embedding synthetic resin molded plate, wherein the beam is a wooden beam. A nut for fastening the crosspieces to each other to assemble a crosspiece having a predetermined shape is embedded in an end face of the crosspiece, and a bolt hole for fastening with the embedding nut at the end face of the crosspiece is provided on a side face of the crosspiece. Drilling, and further, a bolt hole for fastening the crosspiece and the nut embedding plate assembled by fastening the crosspieces to each other,
A nut-embedded pier for assembling a concrete formwork, wherein an appropriate number of piers are drilled at predetermined positions on the upper surface of the pier. 2. The nut embedded pier for concrete formwork assembly according to claim 1, wherein said pier is a plywood pier. 3. The nut-embedded crosspiece for assembling a concrete formwork according to claim 1, wherein said crosspiece is a synthetic wood crosspiece formed by molding wood powder or wood pieces together with a binder. 4. The pier as claimed in claim 1, wherein said nut is an insert nut having a male screw having a self-tapping function on an outer surface and a female screw on an inner surface. 5. A nut-embedded pier for assembling a concrete formwork, wherein said pier is a comb-shaped pier having a curved joint surface with a nut-embedded plate of the pier. 6. A concrete formwork comprising the wooden crosspieces according to claim 1 being fastened to each other to assemble a crosspiece, and the crosspiece and the nut embedding plate being fastened.