EP2449184A2 - Fastening plate - Google Patents

Fastening plate

Info

Publication number
EP2449184A2
EP2449184A2 EP10793663A EP10793663A EP2449184A2 EP 2449184 A2 EP2449184 A2 EP 2449184A2 EP 10793663 A EP10793663 A EP 10793663A EP 10793663 A EP10793663 A EP 10793663A EP 2449184 A2 EP2449184 A2 EP 2449184A2
Authority
EP
European Patent Office
Prior art keywords
plate
anchorage
hole
concrete
fastening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10793663A
Other languages
German (de)
French (fr)
Inventor
Kari Tuominen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Peikko Group Oy
Original Assignee
Peikko Group Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Peikko Group Oy filed Critical Peikko Group Oy
Publication of EP2449184A2 publication Critical patent/EP2449184A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/42—Foundations for poles, masts or chimneys

Definitions

  • the invention relates to a fastening plate comprising a plate- like part and anchorage parts fastened thereto, the fastening plate being in- tended to be arranged in concrete before the concrete hardens and further to be fastened to the concrete by means of the concrete hardening, whereby each anchorage part is fastened to the plate part by means of a threaded connection provided by a threaded part at the anchorage part and a hole with internal threads and provided in the plate part.
  • Fastening plates are elements intended to be fastened to concrete before the concrete hardens.
  • Fastening plates are made of a suitable material, such as steel material.
  • anchorage parts are fastened to the plate part in a suitable way, such as by welding them to the plate surface or to a hole extending through the plate. Threaded connections have also been used for fastening anchorage parts to the plate part.
  • the fastening plates are arranged in concrete in such a manner that the anchorage parts protrude into the concrete and the outer surface of the plate part lies on the surface of the concrete. The fastening plates adhere to the concrete during the hardening of the concrete.
  • the purpose of a fastening plate is to achieve a structure allowing the transfer of forces and loads induced by different structures to concrete.
  • the aforementioned structure is achieved by fastening structural fastening means to the plate part on the surface of the concrete after the concrete has hardened.
  • the fastening may be performed by welding directly to the plate part, for example.
  • different structures may be fastened to the structural fastening means mentioned above and it is possible to achieve a structure that transfers forces and loads induced by different structures via the fastening plate to the concrete.
  • the purpose of the invention is to provide a fastening plate, by which the prior art disadvantages can be eliminated. This is achieved by a fastening plate according to the invention.
  • the fastening plate of the invention is characterized in that the anchorage part comprises an expansion part extending from the threaded part and that around the hole in the plate part there is a groove forming a concentric circumference with the hole, the inner surface of the groove being arranged to consist of a flange part around the hole, the flange part being arranged to yield and cover the groove under the influence of the expansion part when the threaded part of the anchorage part is tightened to the internal threads of the hole in the plate part.
  • the invention provides above all the advantage that it provides a visual aid for controlling the formation of a threaded connection; in other words, the invention makes it is easy and simple to ensure the sufficient tightness of the threaded connection at construction sites and, thus, facilitates the implementation of anchorage under construction site conditions.
  • the inven- tion even allows screwing in the anchorage parts to their places inside a reinforcement. It is also much easier to transport the separate plate parts and anchorage parts to the construction site and handle them during the transport and at the construction site than in cases where a pre-welded fastening plate structure is used.
  • An advantage of the invention is also its simplicity, which makes the adoption of the invention advantageous.
  • Figure 1 shows a perspective principle view of a fastening plate attached to a concrete structure and structural fastening means fastened to the fastening plate
  • Figure 2 shows a principle view of the fastening plate of the invention from the side
  • Figure 3 shows a principle view of the fastening plate according to Figure 2 from another direction
  • Figure 4 shows a detail A of Figure 2 on a larger scale.
  • FIG. 1 shows the principle of a fastening plate attached to a concrete structure 1.
  • the fastening plate comprises a plate part 2 and anchorage parts 3.
  • Structural fastening means 10 are fastened to the plate part 2.
  • the anchorage parts 3 may be fastened to the plate part 2 by welding or a threaded connection, for instance.
  • the fastening plate is arranged in concrete before the concrete dries, whereby it is fastened to the concrete while the concrete hardens.
  • the concrete structure 1 and the structural fastening means 10 are shown in Figure 1 by broken lines.
  • the concrete structure 1 may be any known structure.
  • the structural fastening means may be any structures known per se.
  • different structural elements of a building may be fastened to the structural fastening means 10, whereby forces and loads induced by these structural elements are transferred to the concrete via the fastening plate.
  • the plate part 2 may be made of any suitable material, such as a steel plate part.
  • the anchorage parts may be any suitable steel parts.
  • the free ends of the anchorage parts may comprise widening parts, as shown in Figure 1. However, the aforementioned widening parts are not necessary but it is quite possible to use anchorage parts without widening parts.
  • the anchorage parts may be smooth-surface elements or elements with suitable projection surfaces, such as ribbed steel bars.
  • FIGS 2 to 4 illustrate an embodiment of the fastening plate of the invention.
  • the same reference numerals are used in Figures 2 to 4 as in Figure 1 to refer to the corresponding parts.
  • the anchorage parts 3 are fastened to the plate part 2 by means of a threaded connection.
  • the threaded connection comprises a threaded part 4 provided at the anchorage part 3 and a hole 6 with internal threads 5 provided in the plate part 2.
  • the anchorage part 3 comprises an expansion part 7 extending from the threaded part 4.
  • the expansion part 7 is arranged in such a manner that it forms an extension of the threaded part so that the expansion part is before the threaded part 4 when viewed from the free end of the anchorage part 3 towards the plate part 2.
  • a groove 8 forming a circumference that is concentric with the hole but larger than the hole 6.
  • the inner surface of the groove 8 is arranged to consist of a flange part 9 around the hole 6 with internal threads, the flange part being arranged to yield under the influence of the expansion part 7 when the threaded part 4 of the anchorage part is tightened to the threads of the hole 6 in the plate part in a desired, predetermined manner.
  • the idea of the invention is that when the anchorage part 3 is screwed in and tightened to the hole 6, the expansion part 7 starts at a certain tightening stage to deform the flange part 9, whereupon the flange part 9 yields, i.e. bends radially outwards, so that the groove 8 is covered at a certain predetermined tightening stage.
  • the groove 8 surrounding the hole 6 is preferably a continuous groove extending around the hole 6.
  • a continuous groove provides the advantage that a continuous flange part 9 is achieved along the entire distance, and with a suitable degree of tightening the flange part 9 bends along the entire distance and the whole groove is covered. Such a situation can be easily detected even under difficult construction site conditions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Road Paving Structures (AREA)

Abstract

The invention relates to a fastening plate comprising a plate-like part (2) and anchorage parts (3) fastened thereto, the fastening plate being intended to be arranged in concrete before the concrete hardens and further to be fastened to the concrete by means of the concrete hardening. Each anchorage part (3) is fastened to the plate part (2) by means of a threaded connection provided by a threaded part (4) at the anchorage part and a hole (6) with internal threads (5) and provided in the plate part. The anchorage part (3) comprises an expansion part (6) extending from the threaded part (4), and around the hole (6) in the plate part (2) there is a groove (8) forming a concentric circumference with the hole, the inner surface of the groove being arranged to consist of a flange part (9) around the hole, the flange part being arranged to yield and cover the groove (8) under the influence of the expansion part (7) when the threaded part (4) of the anchorage part is tightened to the internal threads (5) of the hole (6) in the plate part.

Description

Fastening plate
[0001] The invention relates to a fastening plate comprising a plate- like part and anchorage parts fastened thereto, the fastening plate being in- tended to be arranged in concrete before the concrete hardens and further to be fastened to the concrete by means of the concrete hardening, whereby each anchorage part is fastened to the plate part by means of a threaded connection provided by a threaded part at the anchorage part and a hole with internal threads and provided in the plate part.
[0002] Various fastening plates are nowadays well-known in the construction industry. Fastening plates are elements intended to be fastened to concrete before the concrete hardens. Fastening plates are made of a suitable material, such as steel material. According to the prior art, anchorage parts are fastened to the plate part in a suitable way, such as by welding them to the plate surface or to a hole extending through the plate. Threaded connections have also been used for fastening anchorage parts to the plate part. The fastening plates are arranged in concrete in such a manner that the anchorage parts protrude into the concrete and the outer surface of the plate part lies on the surface of the concrete. The fastening plates adhere to the concrete during the hardening of the concrete.
[0003] The purpose of a fastening plate is to achieve a structure allowing the transfer of forces and loads induced by different structures to concrete. The aforementioned structure is achieved by fastening structural fastening means to the plate part on the surface of the concrete after the concrete has hardened. The fastening may be performed by welding directly to the plate part, for example. Thus, different structures may be fastened to the structural fastening means mentioned above and it is possible to achieve a structure that transfers forces and loads induced by different structures via the fastening plate to the concrete.
[0004] There are some practical problems with the prior art solutions. In case of using prefabricated fastening plates, in which the anchorage parts are fastened by welding, the problem is that it is in many cases difficult and sometimes even impossible to mount the plates in their places in the concrete structure, if the concrete structure has a great number of reinforcements. Another disadvantage of a welded connection is also that the anchorage parts welded to the surface cause additional stress on the plate part which, in turn, makes additional demands on the plate part.
[0005] In cases where the welded structure causes problems, it is naturally possible to use fastening plate solutions, in which the anchorage parts are fastened to the plate part by a threaded connection. A drawback of this solution is that, under construction site conditions, it is often difficult to ensure the proper operation of the threads of the threaded connection. A poor fastening of the anchorage parts may endanger the entire fastening process of the fastening plate to the concrete.
[0006] The purpose of the invention is to provide a fastening plate, by which the prior art disadvantages can be eliminated. This is achieved by a fastening plate according to the invention. The fastening plate of the invention is characterized in that the anchorage part comprises an expansion part extending from the threaded part and that around the hole in the plate part there is a groove forming a concentric circumference with the hole, the inner surface of the groove being arranged to consist of a flange part around the hole, the flange part being arranged to yield and cover the groove under the influence of the expansion part when the threaded part of the anchorage part is tightened to the internal threads of the hole in the plate part.
[0007] The invention provides above all the advantage that it provides a visual aid for controlling the formation of a threaded connection; in other words, the invention makes it is easy and simple to ensure the sufficient tightness of the threaded connection at construction sites and, thus, facilitates the implementation of anchorage under construction site conditions. The inven- tion even allows screwing in the anchorage parts to their places inside a reinforcement. It is also much easier to transport the separate plate parts and anchorage parts to the construction site and handle them during the transport and at the construction site than in cases where a pre-welded fastening plate structure is used. An advantage of the invention is also its simplicity, which makes the adoption of the invention advantageous.
[0008] The invention will be explained in the following in more detail by means of the example described in the attached drawing, in which
Figure 1 shows a perspective principle view of a fastening plate attached to a concrete structure and structural fastening means fastened to the fastening plate, Figure 2 shows a principle view of the fastening plate of the invention from the side,
Figure 3 shows a principle view of the fastening plate according to Figure 2 from another direction, and
Figure 4 shows a detail A of Figure 2 on a larger scale.
[0009] Figure 1 shows the principle of a fastening plate attached to a concrete structure 1. The fastening plate comprises a plate part 2 and anchorage parts 3. Structural fastening means 10 are fastened to the plate part 2. The anchorage parts 3 may be fastened to the plate part 2 by welding or a threaded connection, for instance. The fastening plate is arranged in concrete before the concrete dries, whereby it is fastened to the concrete while the concrete hardens.
[0010] The concrete structure 1 and the structural fastening means 10 are shown in Figure 1 by broken lines. The concrete structure 1 may be any known structure. Accordingly, the structural fastening means may be any structures known per se. For example, different structural elements of a building may be fastened to the structural fastening means 10, whereby forces and loads induced by these structural elements are transferred to the concrete via the fastening plate. These facts are well known to a person skilled in the art, wherefore they are not explained in greater detail herein.
[0011] The plate part 2 may be made of any suitable material, such as a steel plate part. The anchorage parts may be any suitable steel parts. The free ends of the anchorage parts may comprise widening parts, as shown in Figure 1. However, the aforementioned widening parts are not necessary but it is quite possible to use anchorage parts without widening parts. The anchorage parts may be smooth-surface elements or elements with suitable projection surfaces, such as ribbed steel bars.
[0012] For a person skilled in the art, this is fully conventional technology, wherefore it is not explained in greater detail herein.
[0013] Figures 2 to 4 illustrate an embodiment of the fastening plate of the invention. The same reference numerals are used in Figures 2 to 4 as in Figure 1 to refer to the corresponding parts.
[0014] In the embodiment of Figures 2 to 4, the anchorage parts 3 are fastened to the plate part 2 by means of a threaded connection. The threaded connection comprises a threaded part 4 provided at the anchorage part 3 and a hole 6 with internal threads 5 provided in the plate part 2. [0015] According to the essential idea of the invention, the anchorage part 3 comprises an expansion part 7 extending from the threaded part 4. The expansion part 7 is arranged in such a manner that it forms an extension of the threaded part so that the expansion part is before the threaded part 4 when viewed from the free end of the anchorage part 3 towards the plate part 2. Around the hole 6 provided with internal threads and provided in the plate part there is a groove 8 forming a circumference that is concentric with the hole but larger than the hole 6. The inner surface of the groove 8 is arranged to consist of a flange part 9 around the hole 6 with internal threads, the flange part being arranged to yield under the influence of the expansion part 7 when the threaded part 4 of the anchorage part is tightened to the threads of the hole 6 in the plate part in a desired, predetermined manner.
[0016] Hence, the idea of the invention is that when the anchorage part 3 is screwed in and tightened to the hole 6, the expansion part 7 starts at a certain tightening stage to deform the flange part 9, whereupon the flange part 9 yields, i.e. bends radially outwards, so that the groove 8 is covered at a certain predetermined tightening stage. This leads to a visible securing mechanism that indicates and ensures in a practical manner when the anchorage part is properly fixed to the plate part 2.
[0017] The groove 8 surrounding the hole 6 is preferably a continuous groove extending around the hole 6. A continuous groove provides the advantage that a continuous flange part 9 is achieved along the entire distance, and with a suitable degree of tightening the flange part 9 bends along the entire distance and the whole groove is covered. Such a situation can be easily detected even under difficult construction site conditions.
[0018] The above example of the invention is not intended to limit the invention in any way, but the invention may be varied entirely freely within the scope of the claims. For example, the shape and size of the plate part may vary freely according to each situation. Accordingly, the number and dimen- sions of the anchorage parts may vary freely according to the situation, etc.

Claims

Claims
1. A fastening plate comprising a plate-like part (2) and anchorage parts (3) fastened thereto, the fastening plate being intended to be arranged in concrete before the concrete hardens and further to be fastened to the con- crete by means of the concrete hardening, whereby each anchorage part (3) is fastened to the plate part (2) by means of a threaded connection provided by a threaded part (4) at the anchorage part and a hole (6) with internal threads (5) and provided in the plate part, characterized in that the anchorage part (3) comprises an expansion part (7) extending from the threaded part (4) and that around the hole (6) in the plate part (2) there is a groove (8) forming a concentric circumference with the hole, the inner surface of the groove being arranged to consist of a flange part (9) around the hole, the flange part being arranged to yield and cover the groove (8) under the influence of the expansion part (7) when the threaded part (4) of the anchorage part is tightened to the in- ternal threads (5) of the hole (6) in the plate part.
2. A fastening plate as claimed in claim ^ characterized in that the groove (8) is a continuous groove extending around the hole (6).
EP10793663A 2009-07-03 2010-06-16 Fastening plate Withdrawn EP2449184A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20095756A FI121821B (en) 2009-07-03 2009-07-03 fixation plate
PCT/FI2010/050507 WO2011001020A2 (en) 2009-07-03 2010-06-16 Fastening plate

Publications (1)

Publication Number Publication Date
EP2449184A2 true EP2449184A2 (en) 2012-05-09

Family

ID=40935837

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10793663A Withdrawn EP2449184A2 (en) 2009-07-03 2010-06-16 Fastening plate

Country Status (4)

Country Link
EP (1) EP2449184A2 (en)
CN (1) CN102472044B (en)
FI (1) FI121821B (en)
WO (1) WO2011001020A2 (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190912181A (en) * 1909-05-24 1910-02-17 James Mcquinn Improvements in Lock-nuts.
NL19923C (en) * 1926-10-27
FR764014A (en) * 1932-11-17 1934-05-14 Safety device for nuts and screw heads
JPS59182503U (en) * 1983-05-24 1984-12-05 三菱重工業株式会社 Embedded board for reinforced concrete structures
US5190426A (en) * 1992-03-02 1993-03-02 Illinois Tool Works Inc. Concrete fastener
US5993129A (en) * 1996-10-04 1999-11-30 Kabushiki Kaisha Youma Kohboh Bolt anchoring device with improved plug portion of bolt
JP2005133360A (en) * 2003-10-29 2005-05-26 Hitachi Plant Eng & Constr Co Ltd Dowel after putting type embedded hardware
DE10351884A1 (en) * 2003-10-30 2005-06-02 Adolf Würth GmbH & Co. KG fastener

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011001020A2 *

Also Published As

Publication number Publication date
WO2011001020A2 (en) 2011-01-06
FI20095756A0 (en) 2009-07-03
WO2011001020A3 (en) 2011-02-24
CN102472044A (en) 2012-05-23
CN102472044B (en) 2013-12-04
FI20095756A (en) 2011-01-04
FI121821B (en) 2011-04-29

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