KR102538646B1 - Plastic flat tie - Google Patents

Abstract

The present invention relates to a functional plastic pre-tie, and includes a tie body 10 in the form of a flat rod; A pair of tie wings 20 and 20' extending from both ends of the tie body 10 and having insertion grooves 21 and 21' into which wedge pins for supporting the euro form are inserted; a notch 30 formed on the upper and lower sides of the boundary between the tie body 10 and the tie wings 20 and 20' and serving as a reference for the cutting line of the tie wings 20 and 20'; It is formed to protrude in the longitudinal direction along the surfaces of both sides of the tie body 10 and the tie wings 20 and 20' to reinforce the strength of the tie body 10 and the tie wings 20 and 20'. It is characterized in that it includes; rib 1.2 (40) (50).

Description

Functional plastic flat tie {Plastic flat tie}

The present invention relates to a pre-tie for maintaining the shape of a euro form used during concrete pouring, and more particularly, to a functional plastic pre-tie that can prevent the occurrence of rust due to condensation and water leakage while being embedded in cured concrete. It's about Thailand.

Pretai is a tool that holds the Euroform facing each other so that the Euroform is not pushed away by the pressure of the concrete being poured into the formwork when the Euroform is used in various construction, civil engineering, and landscaping construction sites. In such a pre-tie, a tie wing having an insertion groove into which a wedge pin is inserted extends to both ends of a flat rod-shaped tie body, and a notch for inducing cutting of the tie wing is provided at the upper and lower sides of the boundary between the tie body and the tie wing. It is realized by forming, and these preties are made by pressing an iron plate with a press.

On the other hand, when the euro forms on both sides are removed after the concrete poured into the formwork is cured, the tie body is embedded in the concrete and the tie wings protrude from both sides of the concrete. At this time, the protruding tie wing was removed from the tie body by hitting it with a hammer or by repeatedly bending it after inserting a long tool into the tie wing.

By the way, after removing the tie wing, both ends of the tie body are exposed to both surfaces of the concrete. Because the pre-tie becomes an iron plate with a lower specific heat than concrete, dew condensation due to the temperature difference or moisture on the concrete surface at the cut surface exposed to the concrete surface, Corrosion was caused by moisture. This corrosion creates rust with repeated dew condensation, and as shown in FIG. 1, it flows down the concrete surface and causes damage to the exterior of the building.

In addition, since the pre-ties are made of steel plates, a repetitive bending process is often performed to remove the tie wings, and a lot of effort and time is required in this process. In general, since at least tens to hundreds of preties are consumed when manufacturing a formwork, the effort and time taken to remove the tie wings from these preties were considerable.

In addition, when the tie wing is not completely cut from the tie body, the uncut portion protrudes to the concrete surface, and this uncut protruding portion causes injury to workers passing around.

In addition, in the process of hitting the tie wing with a hammer, etc. to remove the tie wing, there is a case where the concrete surface is hit incorrectly due to carelessness. In this case, the concrete surface is damaged and the value of the building is eventually reduced. .

The present invention was created to solve the above problems, and even if a long time elapses after the concrete is cured, it can fundamentally prevent rust from being generated, which can prevent damage to the exterior of the building by rust, An object of the present invention is to provide a functional plastic pre-tie.

Another object of the present invention is to easily and completely remove the tie wings from the tie body embedded in the concrete, thereby reducing the effort and time generated in the removal process, and preventing workers from being injured. It is to provide a functional plastic tray that can prevent surface damage.

In order to achieve the above object, the functional plastic fret tie according to the present invention is manufactured by injection molding of engineering plastic, and includes a flat rod-shaped tie body 10; A pair of tie wings 20 and 20' extending from both ends of the tie body 10 and having insertion grooves 21 and 21' into which wedge pins for supporting the euro form are inserted; a notch 30 formed on the upper and lower sides of the boundary between the tie body 10 and the tie wings 20 and 20' and serving as a reference for the cutting line of the tie wings 20 and 20'; And it is formed to protrude in the longitudinal direction along the surfaces of both sides of the tie body 10 and the tie wings 20 and 20' to reinforce the strength of the tie body 10 and the tie wings 20 and 20'. A plurality of 1.2 ribs 40 and 50 for; characterized in that it includes.

In the present invention, the first thickness D1 of the tie body 10 and the tie wings 20 and 20' is 2 to 4 mm, and the second thickness D2 of the first rib 40 is 0.6 to 1.2 mm, and the third thickness D3 of the second rib 50 is 0.6 to 1.2 mm.

In the present invention, the first rib 40 and the second rib 50 are in a form that can be mutually engaged with one side and the other side of the tie body 10 and the tie wings 20 and 20'. is formed with

In the present invention, the first and second rib grooves 60 and 70 formed on the surfaces of the first and second ribs 40 and 50 at positions corresponding to the notch 30 to guide the cutting position; contains more

In this way, the functional pretie 100 of the present invention is manufactured by injection molding of engineering plastic having a significantly higher specific heat than metal, so that heat exchange with concrete is not well performed in a state buried in concrete, so that condensation does not occur. Accordingly, it is possible to prevent the occurrence of rust due to dew condensation on the cut surface of the pre-tie exposed to the concrete surface. Furthermore, since dew condensation does not fundamentally occur, it is possible to prevent neutralization of concrete due to condensation around the pre-tie.

In addition, since rust does not occur on the cut surface of the pre-tie, damage to the concrete exterior due to rust can be prevented even if the cured concrete is finished as it is or finished with water-based paint.

In addition, since the engineering plastic, which is the material of the pre-tie 100, has a smaller bending force than the iron plate, unlike the pre-tie made of iron plate, 10 tie wings (20 ) (20') can be completely removed, and thus the effort and time associated with removing the tie wings 20 and 20' can be reduced. In particular, in view of the reality that more than hundreds of tie wings must be removed at the work site, the omission of the repetitive bending process can drastically reduce the effort and time required to remove the tie wings.

In addition, since the tie wing is perfectly cut from the tie body, there is no case where the uncut ties do not protrude to the concrete surface, which causes frequent worker injury when using steel plate ties, i.e. cutting protruding into the concrete surface. It is possible to prevent worker's injury due to the parts not being operated.

In addition, since there is no need to use a hammer to remove the tie wing, it is possible to fundamentally prevent damage to the concrete surface due to carelessness, enabling high-quality building construction.

1 is a view for explaining that rust water flows on the surface of a building by a conventional iron plate tie;
2 is a perspective view of a functional plastic prettie according to the present invention;
3 is a side view of the pretie of FIG. 2;
4 is a view for explaining first and second rib grooves formed on the surfaces of the first and second ribs on both sides of the tie body and tie wing of FIG. 3;
Figure 5 is a view for explaining that the first and second ribs on both sides of the tie body and tie narae of Figure 4 are formed in a mutually meshed form.

Hereinafter, the functional plastic tray according to the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, what is described as "above" or "above" may include not only what is directly on top of contact but also what is on top of non-contact. Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. Terms are only used to distinguish one component from another. Singular expressions include plural expressions unless the context clearly dictates otherwise. In addition, when a certain component is said to "include", this means that it may further include other components without excluding other components unless otherwise stated. In addition, terms such as "...unit" and "module" described in the specification mean a unit that processes at least one function or operation.

Figure 2 is a perspective view of a functional plastic platy according to the present invention, Figure 3 is a side view of the pretie of Figure 2, Figure 4 is a first formed on the surface of the first and second ribs on both sides of the tie body and tie wings of FIG. , 2 is a view for explaining the rib groove, and FIG. 5 is a view for explaining that the first and second ribs on both sides of the tie body and tie narae of FIG. 4 are mutually meshed.

As shown, the functional plastic tie 100 according to the present invention is manufactured by injection molding of engineering plastic, and includes a flat rod-shaped tie body 10; A pair of tie wings 20 and 20' extending from both ends of the tie body 10 and having insertion grooves 21 and 21' into which wedge pins for supporting the euro form are inserted; a notch 30 formed on the upper and lower sides of the boundary between the tie body 10 and the tie wings 20 and 20' and serving as a reference for the cutting line of the tie wings 20 and 20'; It is formed to protrude in the longitudinal direction along the surfaces of both sides of the tie body 10 and the tie wings 20 and 20' to reinforce the strength of the tie body 10 and the tie wings 20 and 20'. The first and second ribs 40 and 50; The first and second rib grooves 60 and 70 are formed on the surfaces of the first and second ribs 40 and 50 at positions corresponding to the notch 30 to guide the cutting position.

The functional pretie 100 of the present invention is embedded in concrete and must have heat resistance capable of maintaining its physical properties even in the heat of hydration generated during the concrete curing process, and has a high degree of bending so as not to be damaged even in deformation that may be applied during the process of assembling the euro form. The modulus of elasticity and fatigue properties must be added, and the coefficient of thermal expansion must be similar to that of concrete so that physical properties can be maintained even with thermal expansion applied during the concrete curing process. To this end, the pretie 100 of the present invention is a high-strength engineering plastic, more specifically, PPA (PolyPhthalamide) 33 to 35%, Glass Fiber-reinforced, PVDF (Polyvinylidene Fluoride), CFRP (carbon fiber reinforced plastics), It is manufactured by injection molding using either AFRP (Aramid Fiber Reinforced Polyme) or POM (Polyoxymethylene) 30-40% as a raw material.

A pair of tie wings 20 and 20' extend at both ends of the tie body 10, and a notch 30 is formed at the boundary between the tie body 10 and the pair of tie wings 20 and 20'. there is.

The total length of the tie body 10 and the tie wings 20 and 20' varies depending on the width of a pair of Euroforms to be fixed, and is realized from 300mm to 1,300mm according to the thickness of the retaining wall constructed by the Euroforms It can be.

The width of the tie body 10 and the tie wings 20 and 20' varies depending on the total length, but the first thickness D1 of the tie body 10 and the tie wings 20 and 20' is 2 to 4 mm, in this example 3 mm.

If the first thickness D1 of the tie body 10 and the tie wings 20 and 20' is 2 mm or less, it may not withstand the load or impact of the poured concrete applied between the facing Euro-forms and may be damaged, and if it is 4 mm or more Since the flexural modulus is lowered, it can be easily damaged by the torsional force that can be applied during the Euroform assembly process, and it is also difficult to assemble into the existing Euroform hole.

The first and second ribs 40 and 50 are as shown in FIG. 3 . It is formed to protrude along the longitudinal direction at regular intervals on both sides of the tie body 10 and the tie wings 20 and 20'. As the first and second ribs 40 and 50 are formed long on both sides of the tie body 10 and the tie wings 20 and 20', the physical durability of the entire pretie 100 is enhanced, and the gauze The tie body 10 and the tie wings 20 and 20' can maintain their shape without being damaged even when the facing euroforms are aligned during the manufacturing process or the concrete impact applied when concrete is poured into a formwork.

A plurality of first ribs 40 are formed in the longitudinal direction on one side of the tie body 10 and the tie wings 20 and 20', four in this embodiment, and the second rib 50 is a tie A plurality of, in this embodiment, four are formed along the longitudinal direction on the other side of the body 10 and the tie wings 20 and 20'.

The first and second ribs 40 and 50 protrude from both surfaces of the tie body 10 and the tie wings 20 and 20', and at this time, the protruding first rib 40 has a second thickness D2 is 0.6 to 1.2 mm, the third thickness D3 of the second rib 50 is 0.6 to 1.2 mm, and thus the second and third thicknesses D2 and D3 are 1.2 to 2.4 mm.

As described above, since the first thickness D1 of the tie body 10 and the tie wings 20 and 20' is 2 to 4 mm, the first thickness D1 and the first and second ribs 40 ( 50), the sum of the second and third thicknesses D2 and D3 is at least 3.2 to 6.4 mm.

Meanwhile, as shown in FIG. 4, the first rib 40 and the second rib 50 are mutually engaged with one side and the other side of the tie body 10 and the tie wings 20 and 20'. formed in a form that can be Accordingly, when the preties 100 and the other preties 100' are stacked, gaps are eliminated, thereby reducing the overall volume when several preties are stacked, and thus minimizing the space during distribution and storage.

As shown in FIG. 3, the first and second rib grooves 60 and 70 are formed on the surfaces of the first and second ribs 40 and 50 at positions corresponding to the notches 30 to control the cutting position. guide These first and second rib grooves 60 and 70 are implemented by forming grooves on the surface portion of the first and second ribs 40 and 50 without completely cutting them, and the first and second rib grooves 60 (70) induces the easy cutting of the tie wings (20, 20') and at the same time does not interfere with the structural durability of the pre-tie (100) by the first and second ribs (40, 50) .

In this way, the functional pretie 100 of the present invention is manufactured by injection molding of engineering plastic having a significantly higher specific heat than metal, so that heat exchange with concrete is not well performed in a state buried in concrete, so that condensation does not occur. Accordingly, it is possible to prevent the occurrence of rust due to dew condensation on the cut surface of the pre-tie exposed to the concrete surface. Furthermore, since dew condensation does not fundamentally occur, it is possible to prevent neutralization of concrete due to condensation around the pre-tie.

In addition, since rust does not occur on the cut surface of the pre-tie, damage to the concrete exterior due to rust can be prevented even if the cured concrete is finished as it is or finished with water-based paint.

In addition, since the engineering plastic, which is the material of the pre-tie 100, has a smaller bending force than the iron plate, unlike the pre-tie made of iron plate, 10 tie wings (20 ) (20') can be completely removed, and thus the effort and time associated with removing the tie wings 20 and 20' can be reduced. In particular, in view of the reality that more than hundreds of tie wings must be removed at the work site, the omission of the repetitive bending process can drastically reduce the effort and time required to remove the tie wings.

In addition, since the tie wing is perfectly cut from the tie body, there is no case where the part that is not cut protrudes to the concrete surface. Accordingly, the worker's injury, which was frequent when using steel plate ties, i.e. cutting protruding into the concrete surface It is possible to prevent worker's injury due to the parts not being operated.

In addition, since there is no need to use a hammer to remove the tie wing, it is possible to fundamentally prevent damage to the concrete surface due to carelessness, enabling high-quality building construction.

Although the present invention has been described with reference to an embodiment shown in the drawings, this is only exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom.

100, 100 ... Pre-tie 10 ... Tie body
20, 20' ... tie wing 21, 21' ... insertion groove
30 ... Notch 40, 50 ... 1.2 rib
60, 70 ... 1st, 2nd rib groove

Claims (4)

It is manufactured by injection molding of engineering plastic,
A tie body 10 in the form of a flat rod as embedded in the concrete cast by a formwork made of euroform;
A pair of tie wings 20 extending from both ends of the tie body 10 and protruding to both sides of the facing euro-form, and having insertion grooves 21 and 21' into which wedge pins for supporting the euro-form are inserted. )(20′);
Notches 30 formed on both sides of the boundary between the tie body 10 and the tie wings 20 and 20' to serve as a reference for the cutting line of the tie wings 20 and 20'; and
Three pairs for reinforcing the strength of the tie body 10 and the tie wings 20 and 20' by protruding in the longitudinal direction along the surfaces of both sides of the tie body 10 and the tie wings 20 and 20'. Including; the above first and second ribs 40 and 50;
The first thickness D1 of the tie body 10 and the tie wings 20 and 20' is 2 to 4 mm, and the second thickness D2 of the first rib 40 is 0.6 to 1.2 mm, , The third thickness (D3) of the second rib (50) is characterized in that 0.6 ~ 1.2 mm, functional plastic ties. delete According to claim 1,
Characterized in that the first rib 40 and the second rib 50 are formed in a form that can be mutually engaged with one side and the other side of the tie body 10 and the tie wings 20 and 20' , functional plastic platy. According to claim 1,
Characterized in that it further includes; first and second rib grooves 60 and 70 formed on the surfaces of the first and second ribs 40 and 50 at positions corresponding to the notch 30 to guide the cutting position. , a functional plastic pre-tie.

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