JPS6013958Y2 - Fixing fittings for concrete formwork - Google Patents

Description

[Detailed description of the invention] The present invention consists of a turnbuckle in which screws are formed in opposite directions at both ends, and an overall L screwed into the turnbuckle.
Concrete formwork fixing metal fittings consisting of a letter-shaped metal fitting part, one of the metal fitting parts has a screw part formed to be screwed into a turnbuckle, and the other part has a leg part formed to be inserted into the concrete formwork. Regarding.

As is well known, when constructing a concrete structure such as for waterway construction, a pair of concrete formworks are placed, concrete is poured between them, and the concrete formworks are removed after the concrete hardens.

Fixing fittings are known for positioning the upper ends of a pair of concrete forms with respect to each other.

For example, in Japanese Utility Model Application Publication No. 52-17524 filed by the present applicant, a turnbuckle and an L-shaped metal fitting are combined, and the distance between inserted legs can be freely changed according to the distance between a pair of concrete formworks. something is disclosed.

Although such known concrete formwork fixing fittings are effective in themselves, because the legs are composed of straight rods, the turnbuckle portions drop down to near the top of the concrete formwork. As a result, after concrete is poured, the turnbuckle gets stuck inside the concrete pouring surface, making it impossible to rotate the turnbuckle and making it difficult to remove.

Also, the fact that the legs are straight rod-shaped bodies means that they will not come off when tightened with turnbuckles, but if you insert them first and then tighten them one after another to adjust the spacing, tighten the previous fixings. There was a risk that the worker would carelessly remove the metal fittings with his foot.

Therefore, an object of the present invention is to provide a fixing fitting for concrete formwork that does not cause the turnbuckle to fall during installation, is therefore easy to install and remove, and does not fall off inadvertently. .

According to the present invention, the leg portion to be inserted into the concrete formwork has a first part curved inwardly, a second part formed at the end of the first part and curved outwardly, and a second part curved outwardly. It consists of a tip portion formed at the end of two portions and sloping inward.

Therefore, by inserting the tip into the insertion hole on the top surface of the concrete form, and tightening the turnbuckle so that the top surface of the concrete form is located at the second part that is relatively widened outward, the turnbuckle can be tightened. Since the distance between the upper and lower first portions and the tip end adjacent to the two portions is narrow, there is no risk of the fixing fitting falling or falling off.

Therefore, the turnbuckle is held in a floating position above the top surface of the concrete form, and can be easily tightened or removed.

The drawing shows a state in which concrete 6 is poured between a pair of concrete formworks 5, 5, and a fixing metal fitting, generally designated by the symbol A, is arranged between both concrete formworks 5, 5.

This fixing fitting A consists of a turnbuckle 1 having threads in opposite directions at both ends, and fitting parts 3, 3 having an L-shape as a whole.

The L-shaped metal part 3 has a threaded part 2 formed on one arm thereof, and the other arm forms a leg part 7 that is inserted into an insertion hole 5b drilled in the upper surface 5a of the concrete form 5. .

Therefore, the distance between the legs 7, 7 can be changed by rotating the turnbuckle 1 in the direction of the arrow α or the opposite direction.

This leg portion 7 includes a first portion 7a that is curved inward, and a second portion 7b that is curved outward at the end of the first portion 7a.
and a tip portion 7C that is inclined inward at the end of the second portion 7b.

As shown in the figure, this second portion 7b is engaged with the upper surface 5a of the concrete formwork 5 to tighten the turnbuckle.

Note that 4 in the figure is a nail hole into which a nail is inserted and fixed as necessary.

Insertion hole 5 after installing concrete formwork during work
Rotate the turnbuckle 1 according to the spacing between the ends 7b and 5b, insert the tip 7c, and then insert the second part 7b into the upper surface 5a.
The turnbuckle 1 may be tightened by engaging with the turnbuckle 1.

Therefore, in the vertical direction of the second portion 7b of the leg portion 7, the distance between the first portion 7a and the tip portion 7c is narrow due to the inwardly curved portion, so that it may fall downward, come off, or be accidentally pulled out. Never.

As described above, according to the present invention, the first part, the second part, and the tip part of the leg part are curved, so the fixing fittings do not fall onto the formwork, and the assembly and disassembly of the shoring is facilitated. In addition, since concrete does not adhere to the fixture, the durability of the fixture can be increased, and the curved legs increase the elasticity of the legs, allowing the concrete formwork to be firmly fixed.

Furthermore, since a certain distance can be maintained between the turnbuckle 1 and the surface of the concrete 6, finishing work such as troweling on the concrete surface is easy, and the turnbuckle is not buried in the concrete. do not have.

[Brief explanation of drawings]

The drawing is a partially sectional front view of the fixing fitting according to the invention, and shows the state in which it is used. A...Fixing bracket, 1...Turnbuckle, 2...Screw part, 3...Metal fitting part, 5
... Concrete formwork, 6 ... Concrete, 7 ... Legs, 7a ... First part, 7b ... Second part , 7c...Tip part.

Claims (1)

[Scope of utility model registration request] It consists of a turnbuckle with screws in opposite directions at both ends, and an overall L-shaped metal fitting that screws into the turnbuckle, and one of the metal fittings has a threaded part that screws with the turnbuckle. In the concrete formwork fixing metal fitting, the other part is formed with a leg part to be inserted into the concrete formwork, the leg part formed in the concrete formwork is curved inwardly, and the first part is curved inwardly. A concrete formwork fixing comprising: a second part formed at the end of the first part and curved outward; and a tip part formed at the end of the second part and inclined inward. Metal fittings.