JPH0119716Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is used when it is difficult to determine the levelness of the finish when directly finishing concrete poured on concrete formwork for constructing floor slabs. The concrete is installed at a predetermined level so that the concrete can be poured horizontally to a predetermined thickness, and in particular, it ensures that the levelness of the constructed slab is always maintained even if the concrete formwork for constructing the slab does not have a specified levelness. This is a device for a top ruler that can be maintained.

Preferred embodiments thereof will be described below with reference to the accompanying drawings.

Fig. 1 is a side view showing how the top ruler A according to the present invention is used, and Fig. 2 shows the lower end 2 of the bolt body 1.
A pedestal 5 is attached to the formwork 3 of the concrete slab with fasteners 4 such as nails, a nut 7 is screwed onto the upper male threaded portion 6, and a stepped portion 8 into which the nut 7 is fitted is attached to the lower part. 1 is a side view showing a configuration state in which an elastic body 10 having a hollow portion 9 with Figure 3 is a plan view of the elastic body;
The figure is also a bottom view, and FIG. 5 is the aforementioned angular protrusion 11.
It is a side view which shows the pipe-shaped cylindrical part 13 which fits into. The method of using the top ruler A for constructing concrete slabs of the present invention having the above configuration is as follows.

That is, using a hammer or the like, the pedestal 5 is fixed onto the formwork 3 of the floor slab with fasteners 4 such as nails. Next, the elastic body 10 is fitted into the nut 7 screwed onto the bolt body 1, and then the elastic body 10 is rotated up and down so that the upper surface of the collar opening of the elastic body 10 matches the upper surface of the concrete slab. After moving the elastic body 1 to the desired position,
Pour concrete up to the top of the 0 collar opening. In other words, even if a concrete transfer hose (not shown) collides with the top ruler A of the present invention during work, the elastic body 10 will simply bend, the top ruler A will not fall, and the concrete transfer hose will not collapse. When the hose is removed, the elastic body 10 returns to its original state due to the repulsive force of its material, and serves as an accurate top ruler to indicate its position.
It is possible to repair the concrete horizontally using a trowel or the like. The material of the elastic body 10 may be made of rubber or soft synthetic resin, but other materials do not impede the technical idea of the present invention as long as they are resilient. Next, the usage of the cylindrical portion 13 will be explained as follows. An arbitrary position or height is determined from the top of the concrete using a "transit" prepared in advance, and a position indicating mark 14 is slidably fitted onto the cylindrical part 13 at a position equal to the height. The cylindrical body 15 having the elastic body 15 is fixed to the cylindrical part 13 by a fixture 16, and the cylindrical part 13 is fitted and placed on the angular protrusion 11 on the collar part 12 of the elastic body 10. Of course, it is also within the technical scope of the present invention to form and fit a recessed portion instead of the angular protrusion. That is, when the cylindrical part 13 is rotated so that it comes to the height and position determined by the above-mentioned transit, and the nut 7 screwed onto the bolt body 1 is rotated via the elastic body 10, for example, concrete If the formwork 3 of the floor slab is below the normal horizontal position, the elastic body 1
The tsuba 12 of 0 will float away from the top of the concrete ahead, so use a trowel to move the elastic body 1 over the top of the concrete.
It is sufficient to overlap the concrete up to the flange 12 of the elastic body 10, and conversely, if the formwork 3 of the concrete slab is above the normal horizontal position, the flange 12 of the elastic body 10
Since it will be buried below the top of the concrete, in that case, it can be created at the normal horizontal position at the top of the concrete by scraping it off with a trowel. After that, the elastic body 10 is pulled out from the bolt body 1, and the hole left by the elastic body 10 is finished using a trowel to complete the work. It goes without saying that the present invention will be more effective if the pedestal 5 also serves as an insert mechanism so that a suspension bolt (not shown) can be screwed into it. As mentioned in the description, the pedestal of the crown ruler for constructing concrete deck slabs of the present invention can be easily fixed on the formwork, and the crown ruler can be firmly erected on the formwork and the elastic body of the crown ruler can be easily fixed on the formwork. The top position can be easily adjusted by rotating the , and even if there is an error in the horizontal position of the concrete slab formwork itself, the specified height can be easily and reliably compensated for. , it has the effect of allowing concrete to be cast to an accurate and even required thickness and on a horizontal surface, and by using an elastic body of the required length, it can be used to construct various floor slabs with different thicknesses. Therefore, its versatility is extremely effective, and compared to conventional products as a top ruler, it is far superior in terms of reliability. In addition, by removing the elastic body from the bolt body set up on the pedestal before the concrete hardens and finishing the work with a trowel, it is possible to prevent through holes from forming in the concrete, and to avoid leaving protrusions in front of the concrete. ,
Furthermore, since no foreign material penetrates the slab from above to below, the top ruler for concrete construction of the present invention has extremely practical effects, such as preventing water leakage accidents. It is something.

[Brief explanation of drawings]

FIG. 1 is a side view showing the state of use of the present invention. FIG. 2 is a side view showing the main structure of the present invention. Figure 3 is its plan view. Figure 4 is a bottom view of the same. FIG. 5 is a side view of the cylindrical portion. A...Top ruler, 1...Bolt body, 2...Lower end, 3...Formwork, 4...Stopper, 5...Pedestal, 6
...Male thread, 7...Nut, 8...Step, 9...
Hollow part, 10... Elastic body, 11... Angular protrusion, 12... Flange part, 13... Cylindrical part, 14... Position indicator, 15... Cylindrical body, 16... Fixing tool .

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An elastic body equipped with a rotational height adjustment mechanism is fitted into the bolt body which is set upright on a pedestal that is fixed to the concrete formwork for constructing the deck slab, and the upper A top ruler for concrete construction, in which a cylindrical part having a cylindrical body having a position indicating mark is fitted in a angular protrusion erected on a flange so as to be slid and fixed by a fixture. (2) An elastic body equipped with a rotational height adjustment mechanism is fitted onto the bolt body that is set up on a pedestal that is fixed to the concrete formwork for constructing the floor slab, and a concave part is drilled in the flange at the top of the bolt body. Concrete floor slab construction according to claim 1, which is a registered utility model, in which a protrusion of a cylindrical part is slidably fixed to a cylindrical body having a position indicating mark by a fixture. Top ruler.