JP3584444B2 - Concrete formwork fixing member - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a concrete receiving plate which is disposed outside a concrete receiving plate of a concrete form used in concrete placing work and is connected to an anchor member disposed inside the concrete receiving plate. The present invention relates to a form-fixing member that is used in a state where it is interposed therebetween.
[0002]
[Prior art]
Conventionally, in order to build a concrete structure such as a sabo dam, for example, as shown in FIG. 5, a cross-sectional structure of a main part, concrete forms 1 are arranged vertically and horizontally along a column 5 to form an overlapping mold. The reinforcing frames 1b, 1b of the frame 1 are fixed with the connecting hook bolts 7 and the like, and the inner metal fitting 3, which is usually called a cone, is arranged facing the concrete placing space S side of the concrete form 1; An anchor member 2 or a connection fitting connected to the anchor member 2 is attached to the concrete placing space S side, and the form 1 and the support 5 are tightened and connected by a foam tie rod 6 outside the form 1 to form the concrete mold. The concrete receiving surface is constructed by standing upright at a predetermined angle at a predetermined position so that the frame 1 forms a concrete placing surface.
[0003]
After that, concrete is poured into the concrete placing space S and the concrete is awaited. If the concrete structure to be built has a height equal to or higher than the height of one concrete formwork assembly, after constructing the first-stage concrete C0, the same operation is repeated above the concrete C0. The second and third stages of concrete structures are sequentially stacked and built.
[0004]
In this sequential stacking and building operation, the form tie rod 6 is removed after the lower cast concrete has hardened to the required hardness, the form support 5 is removed from the concrete form 1 and lifted upward to make a slide transition. There is a main pillar slide method of assembling the concrete form 1 required for the next upper concrete construction with the support pillar 5 and constructing a concrete receiving surface in the same manner as described above. Further, as another construction method, after the lower cast concrete is left as it is for a predetermined curing period and is sufficiently hardened, the concrete form 1 and the column 5 are lifted as they are on the upper tier, and are erected in a required posture. Daigumi slide method is also used.
[0005]
[Problems to be solved by the invention]
Of the above conventional methods, in the former main pillar slide method, if the cast concrete had to be hardened to such an extent that the formwork 1 could be removed, the next upper formwork was assembled. It is late and the worker has to wait during that time, and the working efficiency becomes extremely poor. Therefore, even if the shape of the cast concrete becomes hardened, the foam tie rod 6 is loosened and the support 5 is removed from the concrete form 1 at a time when a curing period for more reliable hardening is required, and the concrete mold is removed. While the frame 1 is left as it is, the column 5 is lifted upward to carry out the next formwork work. In this work, the concrete receiving plate 1a of the formwork 1 and the inner metal fitting 3 located on the concrete side are pressed into contact with each other. Since the foam tie rods 6 tightened to the state are removed, the bonding force between the concrete receiving plate 1a of the form 1 and the inner metal fitting 3 is released, and therefore, the pressing force of the concrete surface that has been in contact with the concrete receiving plate 1a is also reduced. There was a problem that it was released and became easy to separate, and it was not possible to completely cure concrete thereafter.
[0006]
Also, in the latter large assembly slide method, since the concrete form 1 itself is removed from the concrete surface and lifted up together with the columns 5, the complete curing of the cast concrete is completed when removing the form. Therefore, it is necessary to take sufficient time between the placement of the concrete and the removal of the concrete formwork. In this case, too, the construction method has a factor of deteriorating the work efficiency.
[0007]
Therefore, the present invention exerts remarkable hardening in the method capable of solving the problems of the concrete retaining wall construction method which the conventional method had, especially in the former main pillar slide method. It is an object of the present invention to provide a concrete form fixing member to be used.
[0008]
[Means for Solving the Problems]
Solution means of the present invention taken to achieve the above object will be described using the same reference numerals as in the drawings showing the embodiments. The concrete form fixing member of the present invention is located on the concrete placing space S side. For a bolt hole 3a opening toward the concrete form 1 side of the inner fitting 3 connecting one end side to the anchor member 2, a concrete receiving plate 1a of the concrete form 1 is formed from the outside of the concrete form 1. A bolt portion 4a that is screwed and connected through the perforation 1c, a washer member 4c that contacts the outer surface of the concrete receiving plate 1a of the concrete formwork 1, and a foam tie rod that tightens and connects the concrete formwork 1 and the formwork column 5 6 and a nut member 4 provided with a bolt hole 4b for screwing the tip bolt portion 6b.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
In practicing the present invention, the washer member 4c may be embodied as being relatively rotatable and connected to the axial movement-preventing state on the bolt portion 4a at a position biased toward the nut member 4; The nut member 4 is formed such that the sum length w of the axial length thereof and the thickness of the washer member 4c is substantially equal to or shorter than the width W of the reinforcing frame 1b in the concrete formwork 1. It is preferable to carry out as follows.
[0010]
This is because, in the former case, the washer member 4c can be used as a single member without using the washer member 4c as a separate member from the nut member 4 in use. In the latter case, when the concrete form 1 and the support 5 are assembled, a part of the nut member 4 protrudes toward the support 5 of the concrete form 1, which hinders assembly. This is preferable because it does not result in the following. Further, the washer member 4c can be embodied in any suitable shape such as a circular shape, an elliptical shape, a hexagonal or octagonal shape, as well as a square shape in a plan view.
[0011]
【Example】
Hereinafter, details of the present invention will be described based on an embodiment shown in the drawings. FIG. 1 is a cross-sectional view illustrating a use state of an embodiment of the present invention, FIG. 2 is an exploded perspective view illustrating the main part, FIG. 3 is a perspective view illustrating a fixing member, and FIG. .
[0012]
In FIG. 1, a concrete receiving plate 1a forming the concrete receiving surface of the concrete form 1 is made of a conventionally known steel plate, has a rectangular outer shape, and has a width W shown in FIG. Reinforced frame 1b. The reinforcing frame 1b is provided with a hole 1d for inserting a hook-like portion of a hook bolt 7 or for inserting one end of a holding clip fitting. The concrete receiving plate 1a is also fixed to the inside fitting 3 according to the present invention. A perforation 1c is formed to penetrate and connect the bolt portion 4a of the member.
[0013]
The inner metal fitting 3 has a truncated cone shape and is made of synthetic resin or iron. In the case of synthetic resin, a metal part forming the bolt hole 3a is inserted. The inner metal fitting 3 is usually used with its outer end face in contact with the receiving plate 1a of the concrete formwork 1. The outer bolt hole 3a and the inner bolt hole 3a to which the anchor member 2 or the connection fitting 2b connected to the anchor member 2 is connected are formed concentrically. However, the bolt holes 3a may have different large and small diameters in addition to a series of through screw holes.
[0014]
The fixing member is made of metal and has a hexagonal column-shaped nut member 4 having a bolt hole 4b formed therein, and a bolt portion 4a protruding from one end surface of the hexagonal column portion. The protruding root portion 4d has a slightly smaller diameter, and a square washer member 4c is rotatably fitted into the root portion as shown in FIGS. Also, the length of the nut member 4 is such that the length dimension w to which the thickness of the washer member 4c is added is located within the width W of the reinforcing frame 1b of the concrete formwork 1 as shown in FIG. , The dimension is set to be smaller than the width W of the reinforcing frame 1b. That is, the relationship of W ≧ w is satisfied.
[0015]
In order to use this fixing member, as shown in FIG. 1, a bolt portion 4a was formed on the receiving plate 1a from outside the concrete form 1 and arranged on the side of the concrete placing space S through the perforation 1c. The inner metal fitting 3 is screwed into the bolt hole 3a of the inner metal fitting 3 and fastened, and connected to the inner metal fitting 3 with the concrete receiving plate 1a interposed therebetween. A bolt portion 4a at the tip of the anchor member 2 is screwed and connected to a bolt hole 3a on the opposite side of the inner metal fitting 3. Alternatively, as shown in FIG. 4, the bolt at the upper end of the intermediate connecting metal fitting 2 b connected to the length adjusting turnbuckle 2 a having the leading end connected to the anchor member 2 is screwed and connected. On the other hand, on the outside of the concrete form 1, the form support 5 is set up outside the concrete form 1, and the head nut 6 a of the foam tie rod 6 is turned from the outside of the support 5 to the bolt hole 4 b of the nut member 4. The bolt portion 6b is screwed, and a fastening nut 6c is fastened and fixed outside the support post 5. Reference numeral 9 shown in FIG. 4 is a scaffold fixing frame.
[0016]
A required amount of concrete is poured into the concrete placing space S formed by the formwork assembled in this way, and then the foam tie rod 6 is turned upside down at a stage where the concrete has hardened but is in an uncured state. The concrete form 1 is rotated to release the tightening of the nut member 4 with the bolt hole 4b, to release the connection between the form support 5 and the concrete form 1, and to construct the next concrete form. While keeping the form as it is, only the form support 5 is lifted upward, and the upper concrete form 1 is assembled to the support 5 to form an upper concrete placing space S surrounded by the concrete form 1.
[0017]
During the construction of the upper concrete form, the lower concrete C0 requires a sufficient amount of time because the concrete receiving plate 1a of the concrete form 1 is maintained while maintaining the connection between the inner metal fitting 3 and the fixing member. It can be applied to complete curing and a complete concrete structure can be obtained.
[0018]
Although the embodiment which is considered to be representative of the present invention has been described above, the present invention is not necessarily limited to the structure of this embodiment, and as described above, for example, the shape of the washer is changed to a circle or a hexagon. The present invention has the structural requirements of the present invention, achieves the object of the present invention, and can be appropriately modified and implemented within a range having the following effects.
[0019]
【The invention's effect】
As is clear from the above description, the concrete form fixing member according to the present invention is screwed into the concrete fitting plate and the inner metal fitting disposed on the side of the concrete casting space, and screwed into the concrete form. Since the foam tie rods that fix the frame and the form support are detachably connected to the outside of the concrete form, only the concrete form is left in the concrete poured state at an early stage after concrete placement. Then, the form support can be lifted up to perform the next stage concrete formwork work, and the work can be done sequentially without wasted waiting time, yet the casting concrete is completely and completely It can be cured and has the remarkable effect of efficiently and efficiently constructing high quality walls. Than it came to.
[Brief description of the drawings]
FIG. 1 is a partial sectional view showing a main part in a use state.
FIG. 2 is an exploded perspective view illustrating a main part.
FIG. 3 is a perspective view showing the entire fixing member.
FIG. 4 is a schematic cross-sectional view illustrating an implementation method.
FIG. 5 is a schematic sectional view illustrating a conventional method.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Concrete form 1a Concrete receiving plate 1b Reinforcement frame 1c Drilling 2 Anchor member 3 Inner fitting 3a Bolt hole 3b Bolt part 4 Nut member 4a Bolt part 4b Bolt hole 4c Washer member 5 Form post 6 Form tie rod 6b Tip bolt part S Concrete Casting space

Claims (3)

A bolt hole (3a) which is located on the concrete casting space (S) side and opens toward the concrete form (1) side of the inner metal fitting (3) connecting one end side to the anchor member (2). A bolt portion (4a) that is screw-connected from the outside of the concrete formwork (1) through a perforation (1c) formed in the concrete receiving plate (1a) of the concrete formwork (1), and the concrete formwork (1) A washer member (4c) contacting the outer surface of the concrete receiving plate (1a), and a bolt end (6b) of a foam tie rod (6) for fastening and connecting the concrete formwork (1) and the formwork column (5). A concrete formwork fixing member integrally provided with a nut member (4) having a bolt hole (4b) for screwing the same. The concrete formwork according to claim 1, wherein the washer member (4c) is relatively rotatably connected to the bolt member (4a) at a position biased toward the nut member (4) so as to prevent movement in the axial direction. Fixing member. The sum length (w) of the axial length of the nut member (4) and the thickness of the washer member (4c) is substantially equal to the width (W) of the reinforcing frame (1b) in the concrete form (1). 3. The concrete formwork fixing member according to claim 1, wherein the member is formed to be shorter.

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