CN102472044B - Fastening plate - Google Patents

Abstract

The present invention relates to a fastening plate, which comprises: a plate portion (2) and an anchor portion (3) fastened to the plate portion, the fastening plate is arranged in concrete before the concrete is hardened and then tightened by the hardening of the concrete fixed in concrete. Each anchor portion (3) is connected to the plate portion (2) by means of a threaded connection provided by a threaded portion (4) on the anchor portion and a hole (6) provided in the plate portion with an internal thread (5) fasten. The anchoring part (3) includes an extension (6) extending from the threaded part (4), and around the hole (6) in the plate part (2) is provided a groove (8) forming a circumference concentric with the hole ), the inner surface of the groove is arranged to consist of a flange portion (9) surrounding the hole, the flange portion being arranged so that when the threaded portion (4) of the anchoring portion is screwed into the hole in the plate portion ( 6) in the internal thread (5), the flange part buckles under the influence of the expansion part (7) and covers the groove (8).

Description

fastening plate

technical field

The present invention relates to a fastening plate comprising a plate portion and an anchor portion fastened to said plate portion, said fastening plate being arranged in concrete before hardening of the concrete and then fastened in concrete by hardening of the concrete, wherein Each anchor is fastened to the plate by means of a threaded connection provided by a threaded portion on the anchor and an internally threaded hole provided in the plate.

Background technique

Various fastening plates are well known in the construction industry today. Fastening plates are elements that are to be fastened in concrete before the concrete hardens. The fastening plate is made of a suitable material such as steel. According to the prior art, the anchor is fastened to the plate in a suitable manner, for example by welding the anchor to the face of the plate or into a hole extending through the plate. Threaded connections have also been used to secure the anchor to the plate. The fastening plate is set in the concrete such that the anchor portion protrudes into the concrete and the outer surface of the plate portion lies on the surface of the concrete. During the hardening of the concrete, the fastening plates are bonded to the concrete.

The purpose of the fastening plates is to achieve a structure that allows the transfer of the forces and loads caused by the different structures to the concrete. This is accomplished by fastening the structural fasteners to the slab portion of the concrete surface after the concrete has hardened. For example, such fastening can be achieved by welding directly on the plate. Thus, it is possible to fasten different structures to the above-mentioned structural fasteners, and it is possible to realize a structure capable of transmitting the forces and loads caused by the different structures to the concrete via the fastening plate.

There are some practical problems with prior art solutions. When using prefabricated fastening plates, where the anchorages are fastened by welding, the problem is that, if the concrete structure has a large number of reinforcements, it is in many cases difficult or sometimes even impossible to install the individual plates in the concrete structure. in their correct positions. Another disadvantage of the welded connection is that the anchorage welded to the surface causes additional stresses on the plate and thus places additional demands on the plate.

In the case of welded constructions that create problems, it is natural to use the solution of fastening plates, where the anchorage is fastened to the plate by means of a screw connection. A disadvantage of this solution is that, under construction site conditions, it is often difficult to ensure proper operation of the threads of the threaded connection. Poor fastening of the anchor portion may endanger the entire process of fastening the fastening plate to the concrete.

Contents of the invention

The object of the present invention is to provide a fastening plate with which the disadvantages of the prior art can be eliminated. This is achieved by the fastening plate according to the invention. The fastening plate of the present invention is characterized in that the anchoring portion includes an expansion portion extending from the threaded portion, and a groove forming a circumference concentric with the hole is provided around the hole in the plate portion, the groove The inner surface of is arranged to consist of a flange portion surrounding the hole, the flange portion being arranged such that when the threaded portion of the anchor portion is screwed into the internal thread of the hole in the plate portion, the The flange part buckles under the influence of the expansion part and covers the groove.

Importantly, the present invention has the advantage that it provides a visual aid for controlling the formation of the threaded connection; that is, the present invention makes it easy and simple to ensure adequate tightening of the threaded connection at the construction site so that under construction site conditions Contributes to the implementation of anchoring. The invention even allows screwing the individual anchors into their correct position inside the bar. It is easier to transport the individual plate sections and anchorage sections to the construction site and to handle them during transport and at the construction site than with pre-welded fastening plate structures. Another advantage of the invention lies in its simplicity, which facilitates the use of the invention.

Description of drawings

Below by the embodiment described in accompanying drawing, illustrate the present invention in more detail, in accompanying drawing:

Figure 1 is a schematic perspective view showing a fastening plate engaged with a concrete structure and structural fasteners fastened to the fastening plate,

Figure 2 is a schematic view showing the fastening plate of the present invention from one side,

Fig. 3 is a schematic view showing the fastening plate shown in Fig. 2 from another direction, and

Figure 4 shows detail A from Figure 2 on an enlarged scale.

Detailed ways

FIG. 1 shows the principle of a fastening plate engaged with a concrete structure 1 . The fastening plate comprises a plate part 2 and an anchor part 3 . Structural fasteners 10 are fastened on the plate portion 2 . The anchoring part 3 can be fastened to the plate part 2 by welding or screwing, for example. The fastening plate is placed in the concrete before the concrete dries, whereby the fastening plate is fastened in the concrete while the concrete is hardening.

The concrete structure 1 and the structural fastener 10 are shown in dashed lines in FIG. 1 . The concrete structure 1 may be any known structure. Thus, the structural fastener may be of any construction known per se. For example, different structural elements of a building can be fastened to the structural fasteners 10, thereby transferring the forces and loads caused by these structural elements to the concrete via the fastening plate. These facts are known to those skilled in the art, so they will not be explained in more detail here.

The panel 2 may be made of any suitable material, for example a steel panel. The anchor portion may be any suitable steel portion. As shown in Figure 1, the free end of the anchoring portion may comprise a widening. However, the widening described above is not essential, but it is quite possible to use the anchor without the widening. The anchorage can be an element with a smooth surface or an element with suitable protrusions on the surface, such as a ribbed steel bar.

For those skilled in the art, this is completely conventional technology, so no more detailed description will be given here.

2-4 show an embodiment of the fastening plate of the present invention. In FIGS. 2 to 4 , the same reference numerals as in FIG. 1 are used to denote corresponding components.

In the embodiment shown in FIGS. 2-4 , the anchoring part 3 is fastened to the plate part 2 by means of screw connection. The threaded connection comprises a threaded part 4 provided on the anchor part 3 and a hole 6 with an internal thread 5 provided in the plate part 2 .

According to the basic idea of the invention, the anchoring part 3 comprises an extension 7 extending from the threaded part 4 . The extension 7 is arranged such that it forms an extension of the threaded portion so that it is located in front of the threaded portion 4 when viewed from the free end of the anchoring portion 3 towards the plate portion 2 . Around the internally threaded hole 6 provided in the plate portion, there is provided a groove 8 formed concentrically with the hole 6 but larger than the circumference of the hole 6 . The inner surface of the groove 8 is arranged to consist of a flange part 9 surrounding the internally threaded hole 6, which is arranged so that when the threaded part 4 of the anchor part is screwed into the thread of the hole 6 in the plate part , the flange portion yields under the influence of the expansion portion 7 in a desired predetermined manner.

Therefore, the idea of the present invention is that when the anchor 3 is screwed and tightened in the hole 6, the expansion part 7 at a certain stage of tightening starts to deform the flange part 9, whereupon the flange part 9 buckles (i.e. radially Bending outwards) so that the groove 8 is covered during a certain tightening stage. This creates a visible fastening mechanism, showing and ensuring that the anchor is properly fastened to the plate part 2 in a practical manner.

Preferably, the groove 8 around the hole 6 is a continuous groove extending around the hole 6 . The advantage of a continuous groove is that a continuous flange portion 9 is achieved along the entire distance and with an appropriate degree of tightening the flange portion 9 is bent along the entire distance and the entire groove is covered. This condition can be easily detected even under difficult construction site conditions.

The above-described embodiments of the invention do not limit the invention in any way, but it can be varied completely freely within the scope of protection of the claims. For example, according to different situations, the shape and size of the plate portion can be freely changed. Therefore, the number, size, etc. of the anchoring portions can be freely changed according to different situations.

Claims (2)

1. A fastening plate comprising: a plate portion (2) and an anchor portion (3) fastened to the plate portion, the fastening plate is set in concrete before the concrete is hardened and then utilizes the hardening of the concrete Fastened in concrete, wherein each anchor ( 3) fastening with the plate portion (2), characterized in that the anchor portion (3) includes an expansion portion (7) extending from the threaded portion (4) and surrounds the plate portion (2) The inner hole (6) is provided with a groove (8) forming a circumference concentric with said hole, the inner surface of said groove being arranged to consist of a flange portion (9) surrounding said hole, said raised The rim is arranged so that when the threaded part (4) of the anchor part is screwed into the internal thread (5) of the hole (6) in the plate part, the flange part is in the extension part (7) buckles under the influence and covers the groove (8). 2. Fastening plate according to claim 1, characterized in that the groove (8) is a continuous groove extending around the hole (6).

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