JPH0531159Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention maintains a predetermined interval between opposing concrete formworks that are assembled and arranged on both sides of the concrete pouring position during concrete pouring work. This relates to separators for concrete formwork used for

<Prior art> As shown in Figure 10 of the attached drawings, a conventional separator for concrete formwork of this type has a structure in which the inside and outside of concrete formwork A are connected through holes formed in the formwork surface of concrete formwork A. Position the short screw member I so that it protrudes from the side, screw the embedded concrete C onto the concrete casting surface side of the formwork A (left side in the figure), and screw one end of the form tie (registered trademark) F onto the outside. One end of the round bar-shaped separator part B is screwed and connected to the free end side _C1 of the embedded concrete C, and the vertical butter material D for assembling the formwork A is connected to the form tie (registered trademark) F side. and horizontal butter material E, and these washers G
They were connected by tightening them with nuts H (or sheet piles).

<Problem to be solved by the invention> However, with such conventional concrete formwork separators and their connection methods, it is only necessary to remove the short screw member I after dismantling the formwork and close the screw hole of the embedded concrete C. Therefore, the separator part B located in the poured concrete remained buried in the concrete, and the so-called separator part B was disposable. In addition, the work of attaching the conventional separator to the formwork required workers to be present on both sides of the opposing formwork and to work in pairs. Therefore, the installation work, that is, the assembling work of the formwork, requires a great deal of time and effort, making it impossible to improve work efficiency.

To solve this problem, a proposal has been made to form a "claw" on one side of the washer that can be fixed to the formwork, thereby preventing the separator from falling out of the formwork when attaching Form-Tie (registered trademark) or the like, thereby improving work efficiency; however, such separators are ultimately "disposable" in nature.

In addition, with this type of conventional separator disposable method, not only is it uneconomical because the separator is disposable, but the separator inside the concrete will rust due to long-term use, and the rust will be exposed on the concrete surface and stain the concrete surface. There was a drawback.

The purpose of the present invention is to provide a separator for concrete formwork that can solve all of the conventional drawbacks, which can be easily attached to the formwork, and which can be assembled by one person. In addition, the present invention proposes an economical separator for concrete formwork in which the separator portion located in the concrete is not disposable, but can be reused as many times as desired.

<Means for solving the problems> The structure of the present invention to achieve the above object will be explained using FIGS. 1 to 5 corresponding to the embodiments. is a separator used to maintain the distance between the opposing concrete formworks K and K′,
A form tie (registered trademark) 1 with a flange 11 fixed to the outside of a through hole K1 formed in one formwork K, and a washer 2 fixed to the inside of the hole K1,
A washer 3 fixed to the inside of a through hole K2 formed in the other formwork K', a form tie (registered trademark) 4 with a flange 41 fixed to the outside of the hole K2,
A separator part 5 for maintaining the distance connects the two Form Ties (registered trademarks) 1 and 4, and the separator part 5 is formed in the shape of a round bar, with one end of the separator part 5 connecting the Form Ties (registered trademark) 1 and 4 on the other side.
It has a structure in which a male thread 51 is formed at the proximal end of the continuous part in an extended position on the side where the flange 41 is formed, and a thread 52 is also formed at the free end. The male screw 51 on the proximal end is screwed into the male screw 31 formed on the washer 3 on the other side, and the screw 52 on the free end is connected to the threaded portion 21 or 21' formed on the washer 2 on the one side. It has a screw-fitting structure,
Further, nail bodies 6 are welded to the washers 2 and 3 so that they can be fixed to the formworks K and K' by themselves, or nail holes 61 are bored therein. and,
In addition to the threaded portion 21 or 21' to be screwed into the screw 52, the washer 2 on the free end side has a screw to be screwed into the screw 13 of the form tie (registered trademark) 1 corresponding to the washer 2. It is important that 23 is also engraved.

<Function> Since the concrete formwork separator according to the present invention is constructed as described above, one washer 2 is placed on the inner side of the through hole K1 of one formwork K before the formwork is assembled. Place the other washer 3 into the other formwork.
Washer 2,
The form tie (registered trademark) 1 is fixed to one formwork K from the outside, and in this state the formwork K , K', insert the separator part 5 into the through hole K2 from the outside of the other formwork K', and connect the connecting form tie (registered trademark).
By rotating and tightening 4, installation of the form ties (registered trademark) to the formworks K and K' can be completed.

<Example> Examples of the present invention will be described below.

The general structure of the separator for concrete formwork according to the present invention in the embodiment shown in FIGS. 1 to 5 is as described in the section of means for solving the problems described above. The separator for concrete formwork in this embodiment has the structure of one washer 2 (hereinafter referred to as the left side and the right side based on the drawings), and a left form tie (registered trademark) 1 screwed on the left side of the washer plate 22. Male screw part 2 that screws into hole 13
3, has a screw hole 21 on the right side into which the male screw 52 on the free end side of the separator portion 5 is screwed, and nails 6, 6 are integrally formed in series on the peripheral edge thereof. It exists as a structure. Also, the washer plate 3 is also attached to the washer 3 on the right side.
2, nail bodies 6, 6 are integrally formed in series. Furthermore, the separator portion 5 has a male thread 51 on the proximal end slightly larger and a male thread 52 on the free end slightly smaller than the diameter of the intermediate round bar portion. Although the separator portion 5 and the right form tie (registered trademark) 4 may be screwed together, they are shown as integrally connected in this embodiment.

Therefore, in order to use the concrete formwork separator formed in this way for assembling the concrete formworks K and K' to be erected on both sides of the space A where concrete is to be poured, it is necessary to use the concrete formwork separator as described in the above section of operation. Just do it. Figures 2 and 4 show the assembled state, and Figure 3 shows the state before assembly to the formwork, and Figure 5 shows the removed state after the poured concrete C has hardened. There is.
In addition, in Figures 2 and 4, in order to make it easier to understand the assembly posture, the reinforcing frames on the back side of the formworks K and K' are excluded, and the formworks K and K' are shown as plate-shaped ones. show,
It is shown assembled using a vertical end piece 71, a horizontal end piece 72, an end piece presser washer 73, and a tightening sheet pile 74 directly on the back surface thereof.

As shown in FIG. 3, the separator according to the present invention is constructed by inserting the separator part 5 through the through hole K2 of the right side formwork K' with the formworks K and K' facing each other in an upright position. Put the tip screw 52 into the left washer 2,
The proximal screw 51 and the right form tie (registered trademark) 4 may be rotated and screwed into the right washer 3, respectively.

Further, after the poured concrete C has hardened, the right form tie (registered trademark) 4 is rotated in the opposite direction to release the screwed state and remove the separator portion 5 together with the form tie (registered trademark) 4 from the forms K and K'.
After that, when the forms K and K' are removed, holes 50 are formed in the concrete C. Since the holes 50 are small diameter holes, they can be ignored when covering the concrete surface with tiles or the like, and can be filled with mortar if necessary. In addition, in the case of a retaining wall, etc., it may be left as is and used as a drainage hole.

In the embodiment shown in FIGS. 6 and 7, the washer 2,
Fig. 6 shows another embodiment of the washer plate 2.
A small hole 61 for nailing is formed in 2, 32, and the nail 6
. . , and FIG. 7 shows a structure in which nail bodies 6 are welded to washer plates 22 and 23, respectively.

In the reference example shown in FIG. 8, the left washer 2 is plate-shaped, the stepped portion 54 on the free end side of the separator portion 5 is pressed against it, and the screw 52 is inserted into the screw hole of the left form tie (registered trademark) 1. It has a structure that screws into 13.

In the embodiment shown in FIG. 9, the screw 21 of the left washer 2 in the embodiment shown in FIGS. ', and the two are screwed together. The invention may be implemented in this way.

The separator part 5 referred to in the present invention is appropriately implemented with a length corresponding to the thickness of poured concrete, and a concrete wall for construction is usually
Many of them are 200mm long, so if you manufacture them in a length that corresponds to that length, you can automatically assemble the concrete forms at a predetermined interval.

Moreover, since the separator part 5 referred to in the present invention is pulled out and removed after concrete hardens,
In order to improve separation from the concrete, if the concrete is plated with chrome or lined or coated with synthetic resin, it can be easily pulled out and removed, improving workability.

Although the embodiments considered to be representative of the present invention have been described above, the present invention is not necessarily limited to the structures of these embodiments. It can be implemented with appropriate modification within the scope of achieving the following effects.

<Effects of the invention> The separator for concrete formwork according to the present invention has a washer that can be fixed to the formwork, and has a structure in which the separator part and one form tie (registered trademark) are connected. , before assembling the formwork, fix the washer to the formwork, and when the formwork is in the upright position, insert the separator part from the outside of one formwork using form ties (registered trademark) and attach it to the other formwork. Since it can be integrally connected to the mold, it has the extremely remarkable effect that the work of attaching it to the formwork can be carried out extremely efficiently and easily by one worker.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the present invention. Figure 1 is an exploded perspective view of the whole, Figure 2 is a perspective view of the main parts showing how it is attached to the formwork, and Figure 3 5 to 5 are partially cutaway side views showing the state of attachment and removal to the formwork over time; FIGS. 6 and 7 are partially cutaway perspective views showing another embodiment of the washer;
FIG. 8 is a partially cutaway side view of a reference example, FIG. 9 is a perspective view of a main part of yet another embodiment, and FIG. 10 is a side view of a main part of a conventional example in an assembled state. In the figure, 1 and 4 are Formtie (registered trademark), 2,
3 is a washer, 5 is a separator part, 6 is a nail body, 11,
41 is a flange, 13, 21 is a screw part, 51, 5
2 is a screw, 31 is a female screw, 61 is a nailing hole,
K and K' are concrete forms, and K1 and K2 are through holes.

Claims (1)

[Claims for Utility Model Registration] In order to maintain the distance between the opposing concrete formworks K and K', the washers 2 and 3 fixed to the inner surfaces of the formworks have their own formworks K and K'. In a separator to which a nail body 6 is welded or a nailing hole 61 is drilled so that it can be fixed to the separator, a form tie with a flange 11 is fixed to the outside of a through hole K1 formed in one formwork K. (registered trademark) 1, a form tie (registered trademark) 4 with a flange 41 fixed to the outside of the through hole K2 of the formwork K' on the other hand, and a round bar-shaped form tie (registered trademark) 4 that connects both form ties (registered trademark) 1 and 4. a spacing-maintaining separator part 5, one end of which is connected to the side where the flange 41 of the other form tie (registered trademark) 4 is formed, and a male screw 51 is formed in the connected part of the separator part 5. , and a screw 52 is also formed on the free end side of the separator portion 5, and the male screw 51 of the continuous portion is screwed into the female screw 31 formed on the washer 3 on the other side, so that the free end side of the separator portion 5 is also formed with a screw 52. The screw 52 on the end side screws into the threaded portion 21 or 21' formed on the washer 2 on the one side, and the washer 2 on the one side
A separator for concrete formwork, characterized in that a screw 23 to be screwed into the form tie (registered trademark) 1 is also formed therein. In practical use, the screw 52 on the free end side of the separator part 5 is a male thread or a female thread, and the washer 2 on one side corresponding to the free end side has a female thread or a male thread that screws with the screw 52. A separator for concrete formwork as set forth in the scope of patent claims.