Search

EP-4739928-A1 - SYSTEM AND METHOD FOR SECURING A WALL

EP4739928A1EP 4739928 A1EP4739928 A1EP 4739928A1EP-4739928-A1

Abstract

A system (10) for securing a wall (20), such as a wall (20) of a luminaire head housing (1000), comprising an opening (O) with a non-rotational-symmetric surface (21), said system (10) comprising: a threaded rod (100) configured to extend through the opening (O), said threaded rod (100) comprising a non-rotational-symmetric surface (101) configured to match the non-rotational-symmetric surface (21) oO f the opening (O); a nut (200) configured to be fixed to the threaded rod (100) and to be secured to the wall (20); and a washer (300) configured to be secured to the threaded rod (100) and to the nut (200); wherein the nut (200) is arranged between the washer (300) and the wall (20); wherein a central portion (310) of the washer (300) is configured to engage with the threaded rod (100) so as to block a rotation and a translation of the washer (300) with respect to the threaded rod (100); and wherein a peripheral portion (320) of the washer (300) is configured to be folded and to abut a peripheral portion (220) of the nut (200) so as to secure the washer (300) to the nut (200).

Inventors

  • DELOBEL, OLIVIER
  • MOTTARD, Cédric
  • KARIGER, Laurent

Assignees

  • SCHREDER SA

Dates

Publication Date
20260513
Application Date
20240705

Claims (20)

  1. 1. A system (10) for securing a wall (20), such as a wall (20) of a luminaire head housing (1000), comprising an opening (O) with a non-rotational-symmetric surface (21), said system (10) comprising: a threaded rod (100) configured to extend through the opening (O), said threaded rod (100) comprising a non-rotational-symmetric surface (101) configured to match the non- rotational-symmetric surface (21) of the opening (O); a nut (200) configured to be fixed to the threaded rod (100) and to be secured to the wall (20); and a washer (300) configured to be secured to the threaded rod (100) and to the nut (200); wherein the nut (200) is arranged between the washer (300) and the wall (20); wherein a central portion (310) of the washer (300) is configured to engage with the threaded rod (100) so as to block a rotation and a translation of the washer (300) with respect to the threaded rod (100); and wherein a peripheral portion (320) of the washer (300) is configured to be folded and to abut a peripheral portion (220) of the nut (200) so as to secure the washer (300) to the nut (200).
  2. 2. The system of claim 1, wherein the central portion (310) of the washer (300) comprises a through-hole (H) comprising a non-rotational-symmetric surface (301) configured to match the non-rotational-symmetric surface (101) of the threaded rod (100) so as to block the rotation of the washer (300) with respect to the threaded rod (100).
  3. 3. The system of claim 1 or 2, wherein the non-rotational-symmetric surface (21) of the opening (O) and the non-rotational-symmetric surface (101) of the threaded rod (100) are flat surfaces.
  4. 4. The system of claim 2, wherein the non-rotational-symmetric surface (301) of the washer (300) is a flat surface.
  5. 5. The system of any one of the previous claims, wherein the central portion (310) of the washer (300) comprises a plurality of teeth (311) protruding from an inner surface of the central portion (310), said plurality of teeth (311) being configured to engage with the thread of the threaded rod (100) so as to block the translation of the washer (300) with respect to the threaded rod (100).
  6. 6. The system of claim 5, wherein the plurality of teeth (311) is integrally formed with the washer (300), and wherein the central portion (310) of the washer (300) is provided with a cut (312) on either side of each tooth (311), thereby defining the plurality of teeth (311).
  7. 7. The system of claim 5 or 6, wherein the plurality of teeth (311) is distributed along the inner surface of the central portion (310), wherein preferably the plurality of teeth (311) is arranged symmetrically with respect to a center of the through-hole (H).
  8. 8. The system of any one of claims 5-7, wherein the through-hole (H) further comprises a plurality of curved, preferably circular, surfaces (302) connecting the non-rotational- symmetric surface (301) of the through-hole (H), and wherein respective edges of the plurality of teeth (311) form part of the plurality of curved surfaces (302).
  9. 9. The system of claim 8, wherein the respective edges of the plurality of teeth (311) protrude from the remainder of the plurality of curved surfaces (302) so as to engage with the thread of the threaded rod (100).
  10. 10. The system of any one of claims 5-9, wherein a thickness of the plurality of teeth (311) is smaller than the pitch of the thread of the threaded rod (100), wherein preferably the thickness of the plurality of teeth (311) is between 10 % and 75 % of said pitch.
  11. 11. The system of any one of claims 5-10, wherein the central portion (310) of the washer (300) comprises at least three teeth (311), preferably at least four teeth (311).
  12. 12. The system of any one of the previous claims, wherein the peripheral portion (320) of the washer (300) comprises a plurality of protrusions (321) from an outer surface of the peripheral portion (320), said plurality of protrusions (321) being configured to be folded and each to abut a corresponding area of the peripheral portion (220) of the nut (200) so as to secure the washer (300) to the nut (200).
  13. 13. The system of claim 12, wherein the plurality of protrusions (321) is integrally formed with the washer (300), and wherein the peripheral portion (320) of the washer (300) is provided with a cut (322) on either side of each protrusion (321), thereby defining the plurality of protrusions (321).
  14. 14. The system of claim 12 or 13, wherein the plurality of protrusions (321) is distributed along the outer surface of the peripheral portion (320), wherein preferably the plurality of protrusions (321) is arranged symmetrically with respect to a center of the through-hole (H).
  15. 15. The system of any one of claims 12-14, wherein the peripheral portion (320) of the washer (300) comprises a plurality of flat surfaces (323), and wherein each protrusion (321) is connected to a corresponding flat surface (323).
  16. 16. The system of claim 15 and any one of claims 5-11, wherein the peripheral portion (320) of the washer (300) further comprises a plurality of curved, preferably circular, surfaces (324), each respectively connecting two of the plurality of flat surfaces (323), and wherein each tooth (311) is facing away a corresponding curved surface (324).
  17. 17. The system of any one of claims 12-16, wherein each protrusion (321) is provided with one or more cuts (325) so as to divide each protrusion (321) into two or more respective portions (321a, 321b).
  18. 18. The system of any one of claims 12-17, wherein a radial length of each protrusion (321) is substantially equal to a height of the peripheral portion (220) of the nut (200).
  19. 19. The system of claims 17 and 18, wherein the one or more cuts (325) extend along substantially the entire radial length of each protrusion (321).
  20. 20. The system of any one of claims 12-19, wherein the peripheral portion (320) of the washer (300) comprises at least three protrusions (321), preferably at least four protrusions (321).

Description

SYSTEM AND METHOD FOR SECURING A WALL FIELD OF INVENTION The present invention relates to systems and methods. Particular embodiments relate to a system and a method for securing a wall, such as a wall of a luminaire head housing. BACKGROUND Generally, in various fields of mechanics wherein mechanical parts are secured to one another, such as in luminaire heads or the like, conventional securement systems comprising a threaded rod and an associated nut are used. Such conventional securement systems may be used for securing a wall, such as a wall of a luminaire head housing or the like, and more generally any wall, plate, or sheet. A current problem occurring in said various fields of mechanics, and more in particular in the industry of outdoor luminaire heads, is that vibration of the mechanical parts that are secured to one another, such as the above-mentioned threaded rod, nut, and wall, may cause a loss of torque, i.e., a loosening of the nut with respect to the wall. Said loss of torque, or loosening, of the nut may have severe consequences depending on the specific application in the various fields of mechanics. In order to avoid the above-mentioned loss of torque, or loosening, of the nut with respect to the wall, an improved system for securing a wall is needed. SUMMARY An object of embodiments of the invention is to provide a system for securing a wall, such as a wall of a luminaire head housing. More in particular, embodiments of the invention aim at providing a system for securing a wall, such as a wall of a luminaire head housing, which prevents a loss of torque, i.e., a loosening of the nut with respect to the wall that may occur e.g. during vibration of the wall. Further, embodiments of the invention provide a washer for securing a threaded rod and a nut to a wall, such as a wall of a luminaire head housing, and a method for securing a wall, such as a wall of a luminaire head housing. Said washer and said method prevent a loss of torque, i.e., a loosening of the nut with respect to the wall that may occur e.g. during vibration of the wall. According to a first aspect of the invention, there is provided a system for securing a wall, such as a wall of a luminaire head housing, comprising an opening with a non-rotational-symmetric surface, said system comprising a threaded rod, a nut, and a washer. The threaded rod is configured to extend through the opening, and comprises a non-rotational-symmetric surface configured to match the non- rotational-symmetric surface of the opening. The nut is configured to be fixed to the threaded rod and to be secured to the wall. The washer is configured to be secured to the threaded rod and to the nut. The nut is arranged between the washer and the wall. A central portion of the washer is configured to engage with the threaded rod so as to block a rotation and a translation of the washer with respect to the threaded rod. A peripheral portion of the washer is configured to be folded and to abut a peripheral portion of the nut so as to secure the washer to the nut. In the context of the invention, it is meant by “washer” an orifice flange configured to surround a threaded rod, the threaded rod extending in the orifice, or through-hole, of the flange. A peripheral portion of said orifice flange is deformable so as to abut a peripheral portion of the nut. Opposite surfaces of the orifice flange may be flat, but need not be flat. Embodiments of the invention are based inter alia on the insight that, in conventional systems for securing a wall using a threaded rod and one or more nuts, a loss of torque, i.e., a loosening of the nut with respect to the wall may occur e.g. during vibration of the wall. A first solution consisting in using two adjacent nuts, one above the other, in connection with a threaded rod encounters the same problem, as the first nut, which is arranged between the wall and the second nut, may not be firmly secured to the wall. Thus, according to said first solution, the first nut may rotate with respect to the wall and to the second nut, thereby in turn incurring a loss of torque of the second nut with respect to the wall. A second solution consisting in arranging a washer between the nut and the wall may prevent a peripheral portion of the washer to be folded towards the nut, especially in applications where little space is available and wherein proper access to the washer cannot be guaranteed, such as the inside of a luminaire head housing. Thus, according to said second solution, the washer may not be properly secured to the nut, thereby enabling a rotation of the nut with respect to the washer and incurring a loss of torque of the nut with respect to the wall. In addition, according to said second solution, a position of the washer with respect to the threaded rod and the nut must be adjusted in accordance with a relative orientation of the nut with respect to the threaded rod, which is impractical. By contrast, in the system of embodiments