JPS5926028Y2 - Separator joint stand for concrete formwork - Google Patents

Description

[Detailed description of the invention] The invention has a flat plate-shaped locking part that is removably locked and fixed by inserting one end between the abutting end surfaces of adjacent concrete forms, and the other end is inserted between the contact end surfaces of adjacent concrete forms. The present invention relates to a joint base of a separator for concrete formwork formed in an upwardly open concave fitting portion provided by opposite side walls along the direction.

Such a joint table connects two of them to both ends of a long bar to form a formwork separator. (b) Connection of the separator to the formwork and connection of adjacent formworks can be performed simultaneously.

(c) The length of the separator can be adjusted by replacing the long bar with one of a different length or by changing the connection position of the joint stand relative to the same long bar. ) As a joint stand, it has the advantage of being mass-producible and being cost-effective.

The concave fitting portion of the joint table is left horizontally flat over a relatively long range on both sides in the width direction of the flat strip plate that is the constituent material of the joint table,
The center part is curved downward,
Alternatively, the opposite side walls forming the fitting part are located relatively long apart, and the bottom surface of the protruding fitting part where the opposite side walls are connected at the lower end is horizontal or close to this. Since the structure was configured in such a horizontally flat position, voids were formed on both sides of the width left behind at the top edge, and below the horizontal bottom surface during the hardening of the poured concrete, and due to these holes. , there was a risk that the strength of the hardened concrete wall would decrease and its water-stopping effect would decrease.

In other words, while the poured concrete is hardening, as the moisture content moves upward over time, sand and cement, on the contrary, fall from above, but the horizontally flat widthwise edges It is difficult for conchnaut components such as sand and cement to get into the lower sides and lower horizontal bottom surface, and as a result, voids are created in these areas by the volume of water that has risen.

In view of these circumstances, the present invention aims to provide a joint table that can sufficiently increase the tensile strength by forming protrusions while suppressing the generation of voids as much as possible.

That is, in the joint base of the separator for concrete formwork according to the present invention, in the joint base as described at the beginning, the upwardly open concave fitting portion provided by the opposing both side walls is gradually expanded as the opposite side walls approach the upper side. It is characterized in that it is formed into a V-shaped cross-sectional shape expanded linearly, and a plurality of pairs of pin insertion holes are formed in the opposite side walls at appropriate distances apart from each other in the longitudinal direction.

According to this, while maintaining the advantages of (a) to (a) above, there is no flange portion on both sides of the upper end that remains relatively long in the width direction of the horizontally flat surface. As moisture increases during hardening of the poured concrete, concrete components such as sand and cement can be smoothly guided down along the outer surfaces of the directly opposite side walls,
Since the opposite side walls are sloped surfaces from the upper end to the lower end toward the widthwise center of the joint table, the poured concrete that is to be guided downward by the outer surfaces of the opposite side walls is subject to downward gravity. In addition, it flows smoothly and well toward the center position in the width direction of the joint table, and there are fewer defects that create voids at the bottom of the joint table.
As a result, it has achieved a unique effect with fewer drawbacks such as lowering the strength of hardened concrete walls and lowering the water-stopping effect.

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a perspective view of the joint stand 2, which includes steel, stainless steel, ebonite, glass fiber reinforced plastic (FR).
P), etc., is inserted between the abutting end surfaces of vertically adjacent metal box-shaped concrete formworks 10, 10 at one end, and connected simultaneously with the adjacent formworks 10, 10 through U clips 11. It has a flat locking part 6 that is removably locked and fixed to the molded formwork 10.10, and has an intermediate long bar 12 at the other end that can be removably attached from above intersecting the longitudinal direction. It has a downwardly curved fitting part 5 having a recess 1 for fitting, and the locking part 6 and the fitting part 5 are integrally connected.

The fitting portion 5 has a V-shaped cross section in which the opposite side walls 3, 3 are gradually expanded in a substantially straight line as they approach the upper side.

The locking portion 6 has a hole 7 through which the U clip 11 is inserted.
is bored, and between it and the fitting part 5,
Formwork 10: two perforated cutting lines 9, 9 for cutting off the exposed locking portion 6 from the concrete surface after dismantling
' is formed in a recessed manner, and a plurality of pairs of pin insertion holes 4, 4 are formed in the opposite side walls 3, 3 forming the fitting part 5, spaced apart by an appropriate amount in the longitudinal direction. There is.

A separator is constructed by connecting two joint stands 2 constructed as described above to both ends of the long bar 12 with pins,
As shown in FIG. 3, the opposing formworks 10..., 10... are towed and connected to each other, and concrete is poured between the opposing formworks.

During the hardening of this poured concrete 1~, when the concrete component falls as the moisture content increases, this component smoothly moves along the outer surface of the opposing type side walls 3.3 of the fitting part 5. It is guided down and no gaps are formed on both lateral outer sides and the lower side of the fitting part 5.

Incidentally, if the entire joint table 2 is made of stainless steel or plastic, there is no need to perform anti-corrosion treatment on the cut surfaces along the cutting lines 9 and 9'.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the joint base for a concrete formwork separator according to the present invention, with FIG. 1 being a perspective view, FIG. FIG. 3 is a perspective view showing a state of connection to the frame. 3.3... Opposing both side walls, 4, 4... Pair of pin insertion holes, 5... Fitting portion, 6...
- Locking part, 10... Concrete formwork.

Claims (1)

[Scope of utility model registration request] A flat plate-shaped locking portion 6 whose one end is inserted between the abutting end surfaces of adjacent concrete formworks 10 and 10 to be removably locked and fixed.
and opposite side walls 3 whose other ends are along the longitudinal direction,
3, the joint base of a separator for concrete formwork is formed in an upwardly open concave fitting part 5, and the fitting part 5 is gradually formed into a substantially linear shape as the opposite side walls 3, 3 approach the upper side. It is formed into a widened V-shaped cross section, and a plurality of pairs of pin insertion holes 4, 4 are formed in the opposite side walls 3, 3 at appropriate distances apart in the long direction. Separator joint stand for concrete formwork.