Connection arrangement for superimposed layers of material

Abstract

In aircraft construction, connection elements for connecting layers of insulating material onto walls are subject to special requirements for ease of installation, weight considerations, and resistance to heat. The invention provides a connection arrangement, in particular for superimposed layers of material, whose function is not impaired under extreme heat. The connection arrangement is comprised by a pin with a, head or head arrangement, engaging positions, and a retaining element. The pin, the head or the head arrangement, and retaining element are made up of a skeleton and an outer material where the skeleton is made of a material more resistant to heat than the outer material. Following destruction or removal of the outer material by heat, the remaining skeleton parts of the pin, head part, and retaining element maintain their connections and structure keeping the layers of material in place.

Description

FIG. 1A

A diagram of the connection arrangement according to invention for two layers of material, consisting of a suitably shaped pin with head and a retaining disk which can be connected in an engaging position to the end of the pin.

FIG. 1B

A perspective view of the pin according to invention as in FIG. 1A.

FIG. 1C

A section view of the pin according to FIG. 1B, section plane E, direction of view A.

FIG. 2A

A section view of three material layers and a connection arrangement according to invention consisting of a suitably shaped pin, each of whose ends can be connected to a retaining disk.

FIG. 2B

A perspective view of the pin according to FIG. 3A.

FIG. 2C

A perspective view of the metal skeleton of the pin according to FIG. 3A.

FIG.3A

A perspective view of the connection arrangement according to invention with an arrangement of its head part which may be used for attaching, holding or storing of objects or components.

FIG. 3B

A perspective view of the metal skeleton of the pin and the head-part arrangement.

FIG. 4A

A perspective view of the retaining disk of the connection arrangement according to invention.

FIG. 4B

A perspective view of the metal skeleton of the retaining disk according to FIG. 4A.

Claims

1. Connection arrangement for superimposed layers of material, characterised inthat a pin (1; 1′; 1″) is provided with a head part where said head part is a head (2) or a head arrangement (2″), and engaging positions (s1, s2, s3, s4; s1″, s2″, s3″, s4″) along part of its length of said pin for the attachment of a retaining element (3),where said pin is pushed through the layers of material (A, B) or a hole in the layers of material, and the layers of material are located between said head part and said retaining element,said pin includes a pin skeleton (SK1, SK1″) coated with an outer material by moulding or injection moulding,said head part includes a head part skeleton where said head part skeleton is a head skeleton (SK2) or head-arrangement skeleton (SK2″) coated with an outer material by moulding or injection moulding: and said retaining element (3) includes a retaining-element skeleton (SK3) coated with an outer material by moulding or injection moulding,where material of said pin skeleton, head part skeleton, and retaining-element skeleton is more resistant to heat than said outer material,said pin skeleton (SK1, SK1″) has a main shaft (TR1, TR1″) extending continuously over the length of said pin (1; 1″),with rungs (C1, C2, C3, C4, C5, C6, C7, C8) projecting laterally from said pin; said rungs have ends, said engaging positions (s1, s2, s3, s4; s1″, s2″, s3″, s4″) are formed between said ends of said rungs, said retaining element (3) engages an end of said pin and in an engaging position, said pin skeleton said head part skeleton, and said retaining element skeleton are connected and remain connected following removal of outer layer by burning or melting of said outer layer.

2. Connection arrangement for layers of material arranged against one another characterised inthat a pin (1′) is provided with two free ends and length sections (x, y) assigned thereto, and with engaging positions (s1′, s2′, s3′, s4′; s5′, s6′, s7′) in both length sections, for the attachment of one retaining element (3, 3) to each,where said pin (1′) is pushed through a number of material layers (C, D, E) or through a hole in the material layers, andsaid material layers are located on said pin between said two retaining elements (3, 3),said pin includes a pin skeleton (SK1′) coated with an outer material (4) by moulding or injection moulding,said retaining element (3, 3) includes a retaining-element skeleton (SK1′),said pin skeleton and said retaining-element skeleton are made of a material more resistant to heat than said outer material,said pin skeleton (SK1′) has a main skeleton shaft (TR1′) extending continuously over the length of said pin (1′),with rungs (C1′, C2′, C3′, C4′, C5′, C6′, C7′, C8′; C9′, C10′, C11′, C12′, C13′, C14′) projecting laterally from said pin,said rungs have ends; said engaging positions (s1′, s2′, s3′, s4′; s5′, s6′, s7′) are formed between said ends of said rungs,that said retaining element (3) can be pushed onto each end of said pin and arranged in its engaging position, said skeleton pin and said retaining-element skeleton remain connected following burning or melting of said outer layer.

3. Arrangement according to claim 1, characterised in that at least on of the following:said head part skeleton,said retaining element skeleton (SK3), andan outer surfaces (fa, fs) of said rungs is coated with said outer material at said engaging positions by moulding or injection moulding.

4. Arrangement according to claim 1, characterised in thatouter surfaces (fa, fs) of said rungs are not covered by an outer material at said engaging positions.

5. Arrangement according to claim 1, characterised in thatsaid head arrangement (2″) has an arrangement; said arrangement is an attaching structure, holding space for components, or storage space for objects.

6. Arrangement according to claim 2, characterised in thata flange (F′) is located on said pin (1′) between said sections (x, y) and that layers of material C,D,E) can be arranged on said pin on both sides of said flange (F′).

7. Arrangement according to claim 1, characterised in that said pin (1, 1′, 1″) has asaw-tooth contour in the imaginary lengthwise section, with engaging positions (s1, s2, . . . ; s′, s2′, . . . ; s1″, s2″, . . . ) formed by the gaps between said teeth.

8. Arrangement according to claim 7, characterised in thatsaid saw-tooth profile has rising and falling tooth flanks.

9. Arrangement according to claim 8, characterised in thatsaid rising tooth flanks on said pin rise towards said head part, or towards the other end of said pin and said falling tooth flanks run vertically to the axis of said pin.

10. Arrangement according to claim 2, characterised in thatsaid pin skeleton (SK1, SK1′, SK1″) is a flat stamping.

11. Arrangement according to claim 10, characterised in thatsaid retaining element is a retaining disk (3) with at least three spring arms (F1, F2, F3) pointing towards the centre of said retaining disk.

12. Arrangement according to claim 11, characterised in thatsaid spring arms have ends, said ends of said spring arms embrace, in the form of an arc of a circle (a1, a2, a3), an opening (op) through which said pin (1, 1′, 1″) can be pushed thereby causing said spring arms to yield resiliently.

13. Arrangement according to claim 12, characterised in thatspring arms adjacent to said opening (op) are separated by a slit (s11/2, s12/3, s13/1), where the width of said slit is less than the thickness of said pin skeleton.

14. Arrangement according to claim 13, characterised in thateach of said slits (s11/2, s12/3, s13/1) running towards said opening are aligned tangentially with said opening (op) in the vicinity of said opening (op).

15. Arrangement according to claim 1, characterised in thatsaid pin skeleton has an angle profile, and that said retaining element is a retaining disk with a straight slit which separates one spring arm from other two spring arms pointing towards said slit.

16. Arrangement-according to claim 6, characterised in thatsaid pin (1′) has supporting elements (H) projecting obliquely from said pin for holding at least one layer of material.

17. Arrangement according to claim 1, characterised in thatsaid outer material is plastic, preferably polyamide, and said skeleton material is metal, preferably steel.

18. Pin for a connection arrangement characterised in thatsaid pin (1; 1′; 1″) has engaging positions (s1, s2, s3, s4; s1″, s2″, s3″, s4″) along part of length of said pin for the attachment of a retaining element (3),that said pin includes a pin skeleton (SK1, SK1 ″) coated with an outer material by moulding or injection moulding,where the material of said pin skeleton is more resistant to heat than said outer material,and that said pin skeleton (SK1′) has a main shaft (TR1′) extending continuously over the length of said pin (1′),with rungs (C1, C2, C3, C4, C5, C6, C7, C8; C9′, C10′, C11′, C12′, C13′, C14′) projecting laterally from said pin, said rungs have ends, said engaging positions (s1′, s2′, s3′, s4′; s5′, s6′, s7′) are formed between said ends of said rungs of said pin.

19. Retaining disk characterised in thatsaid retaining disk has at least three spring arms (F1, F2, F3) pointing to the centre of said retaining disk; said spring arms have ends;said ends of said spring arms embrace a circular opening (op) in the shape of the arcs of a circle (a1, a2, a3).

20. Arrangement according to claim 19, characterised in thatspring arms adjacent to said opening (op) are separated by slits (s11/2, s12/3, s13/1), and that said slits (s11/2, s12/3, s13/1) running towards said opening (op) are aligned tangentially with said opening (op) in the vicinity of said opening (op).

21. Arrangement according to claim 5, characterised in thatonly one single layer of material is arranged on said pin between said head arrangement and said retaining element.