JPS63410Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a formwork for forming concrete.
More specifically, the present invention relates to a formwork for concrete forming that is easy to assemble and demold.

Conventional formwork for concrete forming, for example,
As shown in the figure, formwork members a and b are divided into two parts.
and one bottom plate C. When joining, the upper flanges a' and
b' are fastened together with bolts d with wing nuts, and the formwork members a, b and the bottom plate c are
The lower flanges a'', b'' provided on the bottom plate c' and the flange c' provided on the bottom plate c were tightened with bolts d' with wing nuts to fasten them together.

However, in order to assemble the formwork in this way, it is necessary to tighten at least four bolts with equal torque. Also, when disassembling this, it is necessary to loosen each bolt and remove it from the flange. Therefore, much time and effort was required for assembly and demolding operations.

The present invention solves the above-mentioned drawbacks and provides a formwork for concrete molding that is easy to assemble and demold. A pair of bearing pressure pieces having sloped upper surfaces are provided protrudingly adjacent to the parts to be joined to each other so as to face each other when joining the formwork members, and a plurality of bolt rods are provided in correspondence with the pair of bearing pressure pieces. is pivotally attached to the base of the bottom plate, a holding member having a lower inclined recess that engages with the inclined upper surface of the pair of bearing pressure pieces at the upper part of the bolt rod, and a nut for tightening the holding member. In the formwork for molding.

What is shown in the drawing is an embodiment thereof, which includes formwork members 1 and 2 divided into two and a bottom plate 3, which are adjacent to the parts of the formwork members 1 and 2 that are joined to each other. A pair of bearing pressure pieces 4 and 5 are protruded so as to face each other during joining, and two bolt rods 6 and 7 are attached to the bases 8 and 7 of the bottom plate 3 in correspondence with the bearing pressure pieces 4 and 5, respectively.
a presser member 1 pivotally mounted at 9 and engaged with the bearing pressure pieces 4, 5 at the upper part of the bolt rods 6, 7;
0 and 11 and wing nuts 12 and 13 for tightening the holding members 10 and 11.

In addition, in the figure, 14 is a convex portion provided on the bottom plate 3, and 15 is a convex portion provided on the bottom plate 3.
16 is a sloped upper surface provided on the bearing pressure pieces 4, 5, and 16 is a recessed portion on the lower surface of the presser members 10, 11, and both inner sides of the recessed portion are sloped so as to become narrower toward the back from the entrance.

Incidentally, instead of the inclined surface on the inner surface of the lower recessed portion, the outer surface of the bearing pressure pieces 4 and 5 may be formed as an inclined surface.

The formwork of the present invention is suitable as a formwork for cylindrical specimens used in concrete compressive strength tests, but is not limited thereto, and can be used to manufacture concrete molded products for various uses. Further, the shape of the formwork is not limited to a cylinder, but various shapes such as a prismatic shape can be used.

The assembly and disassembly of the concrete molding formwork of the present invention is carried out in the following steps.

First, as shown in Figures 2 to 4, after assembling the two formwork members 1 and 2 and applying the bottom plate 3, the bolt rods 6 and 7 are rotated upward around the bases 8 and 9. Then, the lower surface recesses 16 of the holding members 10, 11 are engaged with the inclined upper surfaces 15 of the bearing pressure pieces 4, 5, and then the wing nuts 12, 13 are tightened.

In this way, when the wing nuts 12 and 13 are tightened together, the lower inclined recesses 16 of the presser members 10 and 11 tighten the bearing pressure pieces 4 and 5 from both sides, and the formwork members 1 and 1 are further tightened via the bolt rods 6 and 7. 2 and the bottom plate 3 can be fastened together at the same time.

When dismantling the formwork, use butterfly nuts 12 and 13.
Loosen the pressure members 10, 1 from the bearing pressure pieces 4, 5.
Just remove 1.

Compared to conventional formwork, the concrete forming formwork of the present invention not only has fewer tightening points, but also
Formwork can be assembled and dismantled quickly and easily. Therefore, the time, effort, etc. required for assembling and demolding the formwork during concrete molding can be significantly reduced.

[Brief explanation of the drawing]

Figure 1 shows an example of a conventional formwork for concrete forming, Figure 2 is a plan view of the formwork of the present invention, Figure 3 is its front view, Figure 4 is its side view, and Figure 5 is the bottom plate. FIG. 6 is a side view showing the assembly of the bolt rod, presser member, and nut, and FIG. 6 is a plan view thereof. 1, 2... Formwork member, 3... Bottom plate, 4, 5...
Bearing pressure piece, 6, 7... Bolt rod, 10, 11... Pressing member, 12, 13... Wing nut.

Claims (1)

[Scope of utility model registration request] It has a plurality of divided formwork members and a bottom plate, and a pair of bearing pressure pieces each having an inclined upper surface are protruded adjacent to the parts of the formwork members to be joined to each other so as to face each other when the formwork members are joined together. A plurality of bolt rods are pivotally attached to the base of the bottom plate in correspondence with the pair of bearing pressure pieces, and the upper part of the bolt rods has a lower inclined recess that engages with the inclined upper surface of the pair of bearing pressure pieces. A formwork for forming concrete comprising a holding member and a nut for tightening the holding member.