JPH0352382Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an improvement of a formwork fastening fitting used in formwork for constructing concrete structures.

(Prior art) Both ends of a rod are inserted through opposing panels of a formwork for constructing a concrete structure, and end support fitting connecting portions are provided at both ends of the rod on the outside of the panel. Clamping fittings for formwork are well known in which the spacing between panels is maintained by placing them in place. By the way, with this type of conventional formwork fastening fittings, the formwork is removed after concrete is poured and both ends of the rod protruding from the concrete surface are hammered and broken, but the cut surfaces are exposed on the concrete surface. This must be hidden in order to be hidden.

(Problem that the invention aims to solve) However, the recesses formed on the concrete surface in order to break both ends of the rods are deep and large, so it is necessary to forcibly close them with separately prepared caps or fill them with mortar. There was a problem in that it needed to be filled, and the work was complicated and time-consuming.

(Means for Solving the Problems) The present invention relates to a fastening fitting for formwork that solves the above-mentioned problems.The present invention relates to a fastening fitting for formwork that solves the above-mentioned problems. A thick receiving metal connection part is provided, and a narrow neck part for cutting the rod is provided next to this, and the rod is provided with a seat plate provided following the narrow neck part for cutting the rod and the inner side of the narrow neck part. It is characterized by integrally providing a flanged synthetic resin seat plate with these embedded in the portion extending over the retaining portion.

(Embodiments) Next, the present invention will be described in detail with reference to illustrated embodiments.

Reference numeral 1 denotes a rod made by cutting a steel bar to a required length, and male threaded portions 2, 2 are formed at both ends of the rod 1, and nuts 3, 3 are formed in the male threaded portions 2, 2, respectively.
At the same time, on the inner side of each of the male threaded parts 2, 2, there are respectively provided thick socket fitting connecting parts 4, 4, followed by thin neck parts 5, 5 for cutting the rod, respectively.
has been established. Further, on the inner side of each of the narrow necks 5, 5 for cutting the rods, seat plate retaining parts 6, 6 each having a plurality of annular grooves are provided. Furthermore, a flat part 7 for preventing rotation is press-molded in the middle part of the rod 1. Reference numeral 8 indicates the seat plate retaining portions 6, 6 from the narrow neck portions 5, 5 of the rod body 1.
It is a flanged synthetic resin seat plate integrally provided to the rod 1 with a portion extending therein embedded, and the flanged synthetic resin seat plate 8 is of a color similar to that of concrete. In addition, 9 is a rough surface portion formed on the outer surface of the flanged synthetic resin seat plate 8 in order to facilitate coloring and painting on the outer surface of the flanged synthetic resin seat plate 8, and 10 is a rough surface portion formed on the outer surface of the flanged synthetic resin seat plate 8. When the flanged synthetic resin seat plate 8 is shaped like a semi-drum, an annular groove for drainage is provided on the inner surface of the flanged seat plate 8 if necessary.

With this structure, the rod 1 is screwed into the male threaded portions 2, 2 at both ends of the rod by unscrewing the nuts 3, 3, and the rod 1 is screwed into the male threaded portions 2, 2 at both ends of the rod 1 between the opposing panels 11, 11 of the concrete formwork. Each of the flanges is inserted into and held by the rod body 1, and is integrally provided by embedding the narrow neck portions 5, 5 for cutting each rod provided in the rod body 1 and the portions extending from the seat plate retaining portions 6, 6 that follow these. The outer surface of the synthetic resin seat plates 8, 8 is covered with panels 11, 1.
1, and the respective end sockets connecting portions 4, 4 protrude through the respective panels 11, 11, and the respective end sockets connecting portions 4, 4
Insert the end-thickness bracket 12 into the nuts 3, 3, which were first unscrewed from the male threaded portions 2, 2 at both ends of the rod 1.
After connecting and fixing by screwing, each end bracket 1
By fitting the end pieces 13, 13 into the ends 2, 12, inserting the wedges 14, 14 into the end pieces holders 12, 12, and tightening the end pieces 13, 13, a formwork is constructed here. In this formwork, the flanged synthetic resin seat plates 8, 8 bury the portion extending from the narrow neck portions 5, 5 for rod cutting to the seat plate retaining portions 6, 6. Since the panels 11 and 11 are integrally integrated, the flanged synthetic resin seat plates 8, 8 do not move even if considerable pressure is applied during this series of operations or during concrete pouring. 11
The predetermined spacing between them is to be reliably maintained.
After pouring concrete, the wedges 14, 14 are removed, the end pieces 13, 13 are removed, the nuts 3, 3 are unscrewed, and the end pieces are unfixed by the end piece receiver connecting parts 4, 4. Bracket 1
Remove the panels 11, 11 except for panels 2, 12, and then tap the male threads 2, 2 at both ends of the rod 1, which are left protruding from the surface of the concrete wall 1, with a hammer. , 4, the flanged synthetic resin seat plates 8, 8 are broken off from the end faces of the narrow neck parts 5, 5 for cutting the rods, respectively. As shown in the figure, its outer surface is flush with the surface of the concrete wall A. As a result, there is almost no risk of corrosion progressing from the slight ends of the narrow necks 5, 5 for cutting the rods, and all that is left to do is spray painting, which is normally done, to achieve a good-looking finish, which is especially suitable for concrete walls. There is no need to add mortar to repair the area. Therefore, such a formwork fastening fitting has the male threaded parts 2, 2 at both ends, the thick receiving fitting connecting parts 4, 4, the narrow neck parts 5, 5 for cutting the rod, and the seat plate retaining part 6, respectively. , 6 is used as an insert, and a synthetic resin is cast to form a brim-like synthetic resin seat plate 8 into the thin neck parts 5, 5 for cutting the rod and the seat plate slip-out prevention parts 6, 6. Since it can be easily manufactured by incorporating it, it has the great advantage of being easy to mass produce and providing at low cost.

(Effects of the invention) As is clear from the explanation of the above-mentioned embodiments, the present invention allows formwork to be constructed with simple work. The brim-shaped synthetic resin seat plate can be left on the same surface as the concrete wall by simply tapping both ends of the rod and breaking it from the end face of the narrow neck part for cutting the rod. Since there are no recesses formed on the concrete surface, there is no need for the conventional work of closing the recesses with caps or filling them with mortar, which is of great practical value.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway perspective view showing an embodiment of the present invention, Figure 2 is a partially cutaway front view of the main part, and Figure 3 is a partially cutaway front view of the main part.
The figure is a partially cutaway side view showing the 4th part in use.
The figure is a partially cutaway side view of a poured concrete wall. 1: rod body, 2: male threaded part, 4: thick end bracket connection part, 5: thin neck part for cutting the rod, 6: seat plate retaining part, 8: flanged synthetic resin seat plate.

Claims (1)

[Scope of utility model registration request] The rod 1 has male threaded portions 2, 2 formed at both ends, and on the inner side of the male threaded portions 2, 2, there are respectively provided end support fitting connecting portions 4, 4, followed by narrow neck portions 5 for cutting the rod. 5, respectively, and the rod 1 has narrow neck portions 5, 5 for cutting the rod, and seat plate slip-off prevention portions 6, which are respectively provided on the inner side of the narrow neck portions 5, 5.
A fastening fitting for a formwork, characterized in that flanged synthetic resin seat plates 8, 8 are integrally provided in a portion extending over 6.