RU197155U1 - MODULAR ELEMENT OF CONSTRUCTION SCRAP FOR CONSTANT FORMWORK - Google Patents

Abstract

The invention relates to building structures, in particular to fixing devices of fixed formwork, which includes devices for forming a space filled with a hardening mortar, which together form part of a building structure. The technical result of the invention is the possibility of tightly fitting the latch on the shank without an increased load on him and providing the possibility of tightly pressing the clamp to the walls of the formwork quickly and without much effort, which generally eliminates t is a strong tension on the screed and reduces the likelihood of the liner tearing or the latch tearing off the liner during concrete pouring. Also, the technical result of the utility model is the optional use of clips. In addition, the utility model provides acceleration and simplification of the formwork installation process. The specified technical result is achieved due to the fact that the declared modular element of the screed for fixed formwork, made of polymer material and containing a core element along the length of which technological holes are made, and which at one end has a response element of the mechanism of connection with the other modular element, and at the other end of which a plate is made, which is a limiter, while on the other a shank, made in the form of an elongated rod, on which the protrusions for inserting a latch in the form of a bracket in the form of a bracket, which is a plate with a central open cutout to enclose an elongated rod, characterized in that the protrusions for inserting a latch between them are made, are located, which corresponds to the step distance between them, and the latch plate is smooth on one side, and on the other hand has stiffeners in the form of bulges, and the thickness of the cross section The formation of the retainer plate together with the thickness of the stiffeners corresponds in total to the double step between the protrusions for inserting the retainer.

Description

The utility model relates to building structures, in particular, to fastening devices of fixed formwork, which includes devices for forming a space filled with hardening mortar, which together forms part of a building structure.

Known screed building, containing two elements interconnected with the formation of a bridge, at each end perpendicular to the axis of the bridge are two plates, one of which is a latch and is located at the end, and the second, the inner one, is removed from it by a distance equal to the wall thickness panels, while at each end of the jumper there is a shank with grooves that are reciprocal to the latch, the jumper consists of two identical parts equipped with clips of reinforcement connected by fixing elements, and the jumper has projections and reciprocal grooves (RU 166729, E04G 17/06, ЕВВ 2/86, publ. 10.12.2016).

This construction screed consists of two modular elements, identical in design, securely connected by a dog mechanism, made by molding or molding from a polymer material. Each modular element consists of a rod element of an I-section, along the length of which technological holes are made. At one end of such a modular element, a clip-on mechanism response element is formed, and a disk-shaped plate is formed at the other, which is a limiter. On the other side of the limiter there is a shank made in the form of an elongated rod of circular shape in cross section on which annular protrusions are distantly located, between which a clamp in the form of a bracket is inserted. During installation, a hole is drilled in the formwork wall and an elongated round rod is inserted into it from the inside of the formwork until it stops in the disk form of the plate. On the protruding part of the formwork wall, a shank-like fastener is put on that secures the modular element to the formwork wall. Similarly, the modular element is secured in another formwork wall, after which both modular elements are fastened together by a clip mechanism. It turns out a construction screed, which fixes the position of the walls of the formwork at a given distance between themselves. On the rod element of the I-section, there are also protrusions for fastening clips, into which reinforcement bars lying along the formwork are inserted.

The closest analogue is the modular element of the screed for fixed formwork (patent RU182406U, publ.: 08.16.2018.) Made of a polymer material and containing a rod element of I-section, along the length of which technological holes are made, and which at one end has a response element of the mechanism connection with another modular element, and on the other a disk-shaped plate is made, which is a limiter, while on the other side of the limiter there is a shank made in the form of an elongated steel a round-shaped rust in a section on which annular protrusions are distantly located, between which a clamp holder is inserted in the form of a bracket, which is a plate with a central open cut to cover an elongated round-shaped rod in cross-section, characterized in that the disk-shaped plate in cross section is made in two times the transverse dimension of the I-beam core element and is connected to it by an arc-shaped transitions, technological holes are made two times smaller than the transverse dimension terzhnevogo I-section member and a bracket clip is a plate with the bead on the perimeter of the central open cut-out being stiffener, which transverse cutout and the cutout made along this additional thickening convex shape.

In the process of applying the modular element, dynamic loads act on it, due to the misalignment of the holes in the walls of the fixed formwork facing each other. If there is an inaccuracy in the axial arrangement when connecting two modular elements by the mechanism of their connection, for example, clip-on, the rod elements of the I-section are subjected to bending and torsion, leading to breakage of these elements in the seal, that is, at the junction of these elements with the plate by limiters. This kink is due to the fact that during polymerization, the core and the perimeter of the limiter plate cool faster than the zone of their interconnection. The surface layers have time to harden before this happens with the deep layers. As a result, a weakened structure of the polymer material is formed in this zone. The surface layers work in the elastic deformation mode, but it is these stresses that lead to the breaking of weak bonds in the deep layers of the material. As a result, the rod breaks off from the plate. To eliminate this phenomenon, it is necessary to provide such a process of gradual cooling, in which the material structure in the body of the product and on its surface would be the same. But this requires the use of special heat chambers, in which it would be possible to provide a slow cooling process with an adjustable speed. In reality, for single-use building supplies, these cameras are not used to keep their cost low. Therefore, the cooling process occurs at ambient temperature, at which a heterogeneity of the material structure in the finished product occurs, and the task of increasing the uniformity of the material structure is not solved.

This problem is partially solved by reducing the stress on the shanks and retainers when tensioning the connected modular elements in the form of a construction screed.

For this, the installation process of the screed is changed in such a way that after the plate is fixed with a retainer on the shank with the retainer resting in one wall, before similar operations are carried out on the other (opposite) formwork wall, two modular elements located opposite each other are first connected among themselves due to the connection mechanism.

However, the technical problem of this approach is that during the installation of the screed on a fixed formwork, when both modular elements are fastened together or via an extension cord, and braid-shaped clamps are put on the shank parts protruding from the walls of the formwork, which fix the modular elements in the formwork wall, clamps Do not always tightly press the walls of the formwork, leaving a gap.

Since this free position of the clamps is not acceptable and can lead to an uneven thickness of all the walls of the formwork, the clamps are pressed through a large force, which contributes to the fact that the tension load on the end shanks also increases sharply. This often leads to the separation of the shanks at the time of pouring concrete for the reasons described above.

In addition, it is often not always possible to install the clamp on the shank with effort, this process requires additional time, which increases the total installation time.

Due to the problems described above, a similar method is not used in known solutions, but they use a preliminary installation of both clamps at the ends of the shanks and only then connect two modular elements located opposite each other due to the connection mechanism. In addition, in the places of the proposed location of the reinforcement rods, clips are fixed on the surface of the rod element to strengthen the connection, which has a strong tension and since without the clip, the screed can become disconnected under high tension.

As mentioned earlier, this method does not solve the technical problem of voltage and detachment of the retainer from the shank.

The objective of the utility model is to eliminate these technical problems.

The technical result of the utility model is the realization of the possibility of tightly fixing the latch on the shank without an increased load on it and providing the possibility of tightly pressing the latch to the walls of the formwork quickly and without much effort, which generally eliminates strong tension on the screed and reduces the likelihood of the shank breaking or tearing off the shank in the process of pouring concrete. Also, the technical result of the utility model is the optional use of clips. In addition, the utility model accelerates and simplifies the process of mounting formwork.

The specified technical result is achieved due to the fact that the declared modular element of the screed construction for permanent formwork, made of polymer material and containing a rod element along the length of which technological holes are made, and which at one end has a response element of the mechanism of connection with another modular element, and on the other end of which a plate is made, which is a limiter, while on the other side of the limiter there is a shank made in the form of an elongated rod, on which step by step there are protrusions for inserting a clamp in the form of a bracket between them, which is a plate with a central open cut to cover an elongated shaft, characterized in that the protrusions for inserting a clamp between them are made with a thickness that corresponds to the step distance between them, and the clamp plate with one the side is made smooth, and on the other hand has stiffeners in the form of thickenings, and the thickness of the cross section of the retainer plate together with the thickness of the stiffeners in total corresponds to double step between the tabs to insert the latch.

Preferably, the stiffeners in the form of thickenings on the retainer plate are made around the central notch and from above.

Preferably, in the thickenings on the retainer plate around and above the central cutout there is an additional thickening in the form of a bridge, and additional thickenings are formed on both sides of the central notch towards the edges of the fixer plate, and all the thickenings do not exceed the thickness of the stiffeners or correspond to them.

Preferably, the thickness of the protrusions and the pitch between them are within 2 mm or less than 2 mm.

A brief description of the drawings.

In FIG. Figure 1 shows the design of a modular element for a construction screed with a retainer on the shank and individual examples of the design of the clamps (A - design of a modular element for a construction screed with a retainer on the shank - side view; B - retainer on the side with stiffeners; C - retainer on the smooth side ; Г - the latch on the side having stiffeners and additional thickenings).

In FIG. Figure 2 shows examples of installing a modular element in the form of a construction screed on a fixed formwork (A is an example of installing a latch with the formation of a gap (free space between it and the wall); B is an example of eliminating a gap by inverting the latch on the shank).

In the drawings: 1 — rod element, 2 — technological holes, 3 — reciprocal element of the mechanism for connecting to another modular element, 4 — limiter, 5 — shank rod, 6 — protrusions, 7 — retainer, 8 — cutout for covering the elongated rod, 9 and 11 - thickenings, 10 and 14 - additional thickenings, 12 - the step between the protrusions, 13 - the smooth side of the retainer plate, 15 - the formwork wall, 16 - the gap between the retainer and the formwork wall, 17 - concrete pouring area.

Utility Model Implementation

The modular element (see Figure 1 (A)) contains a rod element 1 along the length of which technological holes 2 are made. At one end, this rod element 1 has a response element 3 of a mechanism for connecting to another modular element. At the other end of the rod element 1, a plate 4 is made, which is a limiter (serves to abut the inner part of the sheet formwork material)

On the other side of the plate 4 of the limiter is a shank made in the form of an elongated rod 5, on which protrusions 6 are arranged stepwise, for example, annular or otherwise shaped. These protrusions 6 are limiters of displacement of the latch 7, which is inserted between the protrusions. This clamp 7 is made in the form of a bracket, which is a plate with a central open cutout 8 to cover the elongated rod 5. The clamp in the form of a bracket is a thin plate with a thickening 9 around the perimeter of the central open cutout 8, from which can be across the cutout and along this cutout additional convex forms of thickening 10 and 14 are made. The plate itself is not a power element, but is loaded by forces from the side of the formwork wall, which leads to its breakage. The implementation of thickenings around the cutout and across it provides an increase in the load capacity of the latch and, therefore, increases the reliability of fastening the fixed formwork.

New is that the protrusions 6 for inserting the latch between them are made with a thickness that corresponds to the distance d of step 12 between them, and the latch plate 7 is smooth 13 on one side (see Fig. 1 (B)), and on the other hand ( see Figure 1 (B)) has stiffeners in the form of bulges 9 and 11, and the thickness of the cross section of the retainer plate together with the thickness of the stiffeners in total corresponds to the value 2d - a double step 12 between the protrusions 6 for inserting the retainer.

Stiffening ribs in the form of thickenings on the retainer plate can be made around the central notch 8 as bulges 9 and on top as the bulge 11. In bulges 9 and 11 on the retainer plate 7 around the central notch 8 and from above between the bulges 9 and 11 (see 1 (D)) an additional thickening in the form of a jumper 14, and additional thickenings 10 can also be formed on both sides of the central cutout 8 towards the edges of the retainer plate 7, and all the thickenings 10 and 14 do not exceed the thicknesses of the stiffeners 9 and 11 or according they exist.

The modular element is made of a polymer material by casting or molding and, in fact, is a single-use building element (consumable).

The modular element is used as follows.

In sheet material (wall of fixed formwork), marking is made (at the places of installation of modular elements) and holes are drilled. Then, a modular element is installed in the hole from the side of the inner wall of the formwork until the plate 4 abuts against this wall 15 (see Figure 2). The shank 5 is then passed through the hole and brought out onto the outer surface of the formwork wall 15. Pressing firmly to the sheet material, plate 4 secures the latch 2 on the shank with the latch stop in the wall 15.

But before similar operations are carried out on the other (opposite) wall of the formwork, first two modular elements located opposite each other are connected to each other due to the connection mechanism.

This approach reduces stress on the shanks and retainers when tensioning the connected modular elements in the form of a construction screed, which in turn makes the use of a clip unnecessary.

As previously noted, the technical problem with this approach is that one of the retainers is not always pressed tightly against the wall of the formwork, leaving a gap 16 (see Figure 2 (A)). A distinctive feature of the claimed utility model is the elimination of this technical problem, which is clearly demonstrated in Figure 2 (A).

As can be seen from Figure 2 (A), when the second latch 7 is closed, a gap 16 is often formed, if you first fix the modular elements with each other after installing the first latch 7.

In order to eliminate this gap, the latch 7 is removed and inserted with the reverse side (invert), deploying it with stiffeners to the wall 15 of the formwork. Since the thickness of the protrusions 6 corresponds to the thickness of the step 12 between them and is equal to the value d, and the thickness of the retainer plate 7 along with the stiffeners in the form of bulges 9 and 11 is equal to 2d, changing the position of the retainer to invert leads to the fact that the retainer 7 abuts against the wall 14 stiffeners 9 and 11, but it remains on the landing section of the step between the same protrusions 6. Thus, changing the position of the latch 7 to invert (as shown in Figure 2 (B)), it is possible to eliminate the gap 16. The gap 16 approximately corresponds value of step d, may differ Xia away slightly, particularly if in the preferred embodiment, the thickness of the projections and the step size between them to perform a range of 2 mm or less than 2 mm.

If the size of the holes 16 is less than half the value of d of step 12, then there is no expediency in the inverted arrangement of the retainer 7. In this case, the clamp 7 is simply pressed against the wall. The clamping force of the clamp 7 with a small amount of tears 16 will be insignificant for the load on the screed.

If the size of the gap 16 is more than half the value of d of step 12, that is, the expediency is in the inverted arrangement of the latch 7. In this case, the formed gap 16 is reduced to a level of less than 1 mm or completely eliminated.

In the places of the proposed location of the reinforcement rods on the surface of the rod element, fixing clips is no longer necessary.

After the installation of the reinforcement rods and their connection with other rods extending across the modular element, the concrete mixture is poured in the zone 17 between the walls 15 with vibration damping or bayoning. After the mixture solidifies on the outer walls, the clips are removed and the ends of the shanks are trimmed. The strength of the clamps in this case becomes an important property of the formwork system. When loading the mixture, a load appears on the walls of the formwork, which leads to their bursting or deformation. And the only knot that holds the wall is the latch on the shank. In addition to increasing the strength of the retainer, stiffeners in the form of thickenings or protrusions, reducing the tension on the screed of modular elements provide solutions:

- the implementation of the latch 7 with the possibility of landing on the shaft 5 of the shank invert (stiffeners in the direction of the wall);

- the implementation of the latch 7 together with the ribs 9 and 11 in thickness corresponding to the two steps 12 between the protrusions 6;

- performing step 12 corresponding to the thickness of the protrusion 6.

These distinctive features of the utility model do not allow the latch plate 7 to break in the direction along the notch due to loads that occur around the perimeter of the notch 8.

In addition, these distinctive features provide the ability to tightly press the latch to the walls of the formwork quickly and without much effort, and this speeds up and simplifies the process of mounting the formwork.

And as a result, eliminating the effect of torsion and bending by reducing the tension of the screed, in turn, reduces the likelihood of the liner tearing off or the retainer tearing off the shank under loads during concrete pouring of the formwork.

The present utility model is industrially applicable. The tests showed that the strength of such a modular element increased by about 28% compared with the prototype, and the bearing capacity to withstand loads increased by 30% compared with the prototype. When constructing the formwork, the yield of unusable (broken, etc.) modular elements decreased by 37%.

In addition, due to stress relieving when connecting the modular elements with each other, the need to use clips has disappeared, which also accelerated and simplified the process of mounting formwork.

Claims (4)

1. The modular element of the screed construction for permanent formwork, made of polymeric material and containing a rod element along the length of which technological holes are made and which at one end has a response element of the mechanism for connecting to another modular element, and at the other end of which a plate is made, which is a limiter while on the other side of the limiter there is a shank made in the form of an elongated rod on which protrusions are located step by step, between which a latch is placed in ide staples, which is a plate with a central open cutout to cover an elongated shaft, characterized in that the protrusions for inserting a latch between them are made with a thickness that corresponds to the pitch between them, and the latch plate is smooth on one side and has ribs on the other side stiffness in the form of thickenings, and the thickness of the cross section of the latch plate together with the thickness of the stiffeners in total corresponds to a double step between the protrusions for inserting the latch. 2. The screed element according to claim 1, characterized in that the stiffeners in the form of thickenings on the retainer plate are made around the central notch and from above. 3. The screed element according to claim 2, characterized in that in the thickenings on the retainer plate around the central cutout and on top of them there is an additional thickening in the form of a bridge, and additional thickenings are formed on both sides of the central cutout towards the edges of the fixer plate, all thickenings do not exceed the thickness of the stiffeners or correspond to them. 4. The screed element according to claim 1, characterized in that the thickness of the protrusions and the step size between them are made within 2 mm or less than 2 mm.

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