EP2055868A1 - Method and device for securing a metal plate fixed to a frame - Google Patents

Method and device for securing a metal plate fixed to a frame Download PDF

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Publication number
EP2055868A1
EP2055868A1 EP07119474A EP07119474A EP2055868A1 EP 2055868 A1 EP2055868 A1 EP 2055868A1 EP 07119474 A EP07119474 A EP 07119474A EP 07119474 A EP07119474 A EP 07119474A EP 2055868 A1 EP2055868 A1 EP 2055868A1
Authority
EP
European Patent Office
Prior art keywords
hole
frame
bolt
plate
nut
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Withdrawn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
EP07119474A
Other languages
German (de)
French (fr)
Inventor
René Andersen
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP07119474A priority Critical patent/EP2055868A1/en
Publication of EP2055868A1 publication Critical patent/EP2055868A1/en
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
    • E05B15/02—Striking-plates; Keepers; Bolt staples; Escutcheons
    • E05B15/0205—Striking-plates, keepers, staples

Definitions

  • the present invention relates to a safety feature whereby a metal plate, fixed to a material softer than the metal, is provided with increased resistance towards forced removal.
  • the strike plate of a lock is secured by drilling a headless screw into the front of the door jamb, fixing the headless screw with a nut drilled into the door jamb from the opposite side and connecting the strike plate and the headless screw with a screw entering the door jamb from the side through a fixing hole of the strike plate and connecting to the headless screw through a transversal hole in the headless screw.
  • An object of the present invention is to provide a method and a device for securing a metal plate fixed to a frame from forced removal, which is easily mounted, for instance in a door jamb or a window frame.
  • a method for securing a metal plate fixed to a frame comprising the steps of; drilling a first hole into the front of the frame substantially perpendicular to said frame in a position aligned with at least one of the screws fixing the plate to the frame, drilling a second hole into the frame either from one side of the frame or from another side of the frame, said second hole being substantially perpendicular to said first hole and being in connection with said first hole, inserting a cylinder shaped nut into the second hole, said nut provided with a slot at least at the end now facing out of the hole, inserting the distal end of a substantially elongated cylinder shaped bolt into said first hole, said bolt comprising a slot at the proximal end, a transversal hole close to said proximal end and a thread at the distal end, said transversal hole preferably threaded, bringing the bolt in connection with the cylinder shaped nut, and fastening the plate to the frame with first screw(s) and/or second screw
  • a method and a device for providing increased resistance towards forced removal to a metal plate fixed to a frame is provided, said device being easily mounted from the front and the side of e.g. a door jamb or a window frame.
  • More than one device according to the invention can be applied by re-using the method according to the invention, i.e. applying more than one bolt for each plate thereby securing the plate even better.
  • the threading on the exterior of the bolt of the device according to the invention can cover part of or extend over the full length of the bolt.
  • the threading of the bolt extends over the full length thereby easing manufacturing because the bolt can be cut, e.g. from a threaded steel rod followed by applying a slot to one end of the bolt.
  • all of the parts of the device are manufactured in stainless steel, but it is realised that other types of corrosion resistant hard metal might be used.
  • the slot at one end of the cylinder shaped nut is a flat-head type providing visible control of the angular orientation of the nut inside the hole in the side of the door jamb, thereby easing the mount of the bolt into the nut inside the door jamb.
  • the cylinder shaped nut is provided with slots at both ends, whereby the slot is visible from outside the hole regardless of which end of the nut is facing out.
  • the slots at the ends of the bolt and the nut are any combination of flat-head slots, cross-slots, torx slots, hexagonal sockets or any other type of screwdriver slots.
  • Fig. 1 shows the device according to the invention installed in a door jamb 3.
  • a snap lock system 2 provides a lock for the door 20.
  • the strike plate 1 of the snap lock system 2 is fixed to both the door jamb 3 and the bolt 4 by means of the screw 18 through the transversal hole 13 in the bolt 4.
  • the bolt 4 is inserted through a hole in the door jamb 3, said hole drilled from the front 12 of the door jamb 3.
  • the bolt 4 is fixed to the door jamb 3 by means of the cylinder shaped nut 5 inserted into a hole drilled from the side 11 of the door jamb 3 with the slot 6 facing outwards the drilled hole, thereby providing visibility of the angular orientation of the nut 5 helping to receive the threaded part 9 of the bolt 4.
  • the bolt 4 can be rotated by means of the slot 7.
  • Fig. 2 shows the device according to the invention inside the door jamb 3.
  • the strike plate 1 is fixed to the door jamb 3 with the screws 8 and 18.
  • the screw 18 is in connection with the strike plate 1, the door jamb 3 and the bolt 4.
  • the strike plate 1 Prior to installing the device according to the invention, the strike plate 1 was fixed to the strike plate 3 with three screws of the same type 8. After installing the device according to the invention, one of said screws has possibly been replaced by another type 18 for fixing the strike plate 1 to both the door jamb 3 and the bolt 4. It might be necessary to expand a hole in the door jamb 3 for fitting the screw 18 that matches the transversal hole 13 in the bolt 4.
  • Fig. 1 and fig. 2 show installation of the device according to the invention wherein the cylinder shaped nut 6 is inserted from the side 11 of the door jamb 3.
  • the nut 6 can just as well be inserted from the side 10 of the door jamb 3 providing the same protection to the strike plate 1.
  • the nut 6 can be installed from the side 10 of the frame 3, because the opposite side 11 is typically facing a wall and is thereby inaccessible.
  • the hole in the frame 3 with the nut 6 can be covered by e.g. joint filler to hide the appearance of the device according to the invention.
  • the side 11 of the frame 3 is accessible. Inserting the nut 6 from the side 11 provides an installation of the device according to the invention, which is completely hidden from the outside after installation in said door jamb or window frame.

Abstract

The present invention relates to a safety feature whereby a metal plate, fixed to a material softer than the metal, is provided with increased resistance towards forced removal. This is achieved by a device and a method for securing a metal plate fixed to a frame comprising the steps of; drilling a first hole into the front of the frame substantially perpendicular to said frame in a position aligned with at least one of the screws fixing the plate to the frame, drilling a second hole into the frame either from one side of the frame or from another side of the frame, said second hole being substantially perpendicular to said first hole and being in connection with said first hole, inserting a cylinder shaped nut into the second hole, inserting the distal end of a substantially elongated cylinder shaped bolt into said first hole, bringing the bolt in connection with the cylinder shaped nut, and fastening the plate to the frame with screws passing through the transversal hole thereby bringing said plate in connection with the bolt. The device according to the invention is easily mounted from the front and the side of e.g. a door jamb or a window frame.

Description

  • The present invention relates to a safety feature whereby a metal plate, fixed to a material softer than the metal, is provided with increased resistance towards forced removal.
  • This is relevant for securing window hinges fixed to wooden frames, strike plates of locking systems fixed to wooden door jambs or other types of hinges on locked entries. When a locked door or window is opened by force, e.g. using a crowbar, the strike plate of the lock or the hinges are often the weak points, and brute force can cause the window frame or the door jamb to break in the position where the strike plate or the hinge is affixed.
  • From DK 165422 a method and a device for providing a locking system with increased resistance towards forced entry are known. The strike plate of a lock is secured by drilling a headless screw into the front of the door jamb, fixing the headless screw with a nut drilled into the door jamb from the opposite side and connecting the strike plate and the headless screw with a screw entering the door jamb from the side through a fixing hole of the strike plate and connecting to the headless screw through a transversal hole in the headless screw.
  • However, a major disadvantage of this solution is the limited access to the back of the door jamb when trying to drill the hole for the nut securing the headless screw in the door jamb. An object of the present invention is to provide a method and a device for securing a metal plate fixed to a frame from forced removal, which is easily mounted, for instance in a door jamb or a window frame.
  • This is achieved by a method for securing a metal plate fixed to a frame comprising the steps of; drilling a first hole into the front of the frame substantially perpendicular to said frame in a position aligned with at least one of the screws fixing the plate to the frame, drilling a second hole into the frame either from one side of the frame or from another side of the frame, said second hole being substantially perpendicular to said first hole and being in connection with said first hole, inserting a cylinder shaped nut into the second hole, said nut provided with a slot at least at the end now facing out of the hole, inserting the distal end of a substantially elongated cylinder shaped bolt into said first hole, said bolt comprising a slot at the proximal end, a transversal hole close to said proximal end and a thread at the distal end, said transversal hole preferably threaded, bringing the bolt in connection with the cylinder shaped nut, and fastening the plate to the frame with first screw(s) and/or second screw(s), said first screw(s) passing through the transversal hole thereby bringing said plate in connection with the bolt.
  • By the present invention a method and a device for providing increased resistance towards forced removal to a metal plate fixed to a frame is provided, said device being easily mounted from the front and the side of e.g. a door jamb or a window frame.
  • More than one device according to the invention can be applied by re-using the method according to the invention, i.e. applying more than one bolt for each plate thereby securing the plate even better.
  • When securing a metal plate already installed on a frame it is most likely necessary to detach the metal plate prior to installing the device according to the invention. This is typically done by loosening the screws fixing the plate to the frame.
  • The threading on the exterior of the bolt of the device according to the invention can cover part of or extend over the full length of the bolt. In a preferred embodiment of the invention the threading of the bolt extends over the full length thereby easing manufacturing because the bolt can be cut, e.g. from a threaded steel rod followed by applying a slot to one end of the bolt.
  • In a preferred embodiment of the invention all of the parts of the device are manufactured in stainless steel, but it is realised that other types of corrosion resistant hard metal might be used.
  • In a preferred embodiment of the invention the slot at one end of the cylinder shaped nut is a flat-head type providing visible control of the angular orientation of the nut inside the hole in the side of the door jamb, thereby easing the mount of the bolt into the nut inside the door jamb. In another embodiment of the invention the cylinder shaped nut is provided with slots at both ends, whereby the slot is visible from outside the hole regardless of which end of the nut is facing out.
  • In other embodiments of the device according to the invention, the slots at the ends of the bolt and the nut are any combination of flat-head slots, cross-slots, torx slots, hexagonal sockets or any other type of screwdriver slots.
  • Below is a detailed description of the device according to the invention referring to figures 1 and 2 illustrating the device installed in a door jamb, said device securing the strike plate of a snap lock system.
    • Fig. 1
    is a cross-sectional vertical view of a snap lock system and the device according to the invention inside a door jamb; and
    Fig. 2
    is a perspective view of a strike plate and the device according to the invention inside a door jamb.
  • Fig. 1 shows the device according to the invention installed in a door jamb 3. A snap lock system 2 provides a lock for the door 20. The strike plate 1 of the snap lock system 2 is fixed to both the door jamb 3 and the bolt 4 by means of the screw 18 through the transversal hole 13 in the bolt 4. The bolt 4 is inserted through a hole in the door jamb 3, said hole drilled from the front 12 of the door jamb 3. The bolt 4 is fixed to the door jamb 3 by means of the cylinder shaped nut 5 inserted into a hole drilled from the side 11 of the door jamb 3 with the slot 6 facing outwards the drilled hole, thereby providing visibility of the angular orientation of the nut 5 helping to receive the threaded part 9 of the bolt 4. The bolt 4 can be rotated by means of the slot 7.
  • Fig. 2 shows the device according to the invention inside the door jamb 3. The strike plate 1 is fixed to the door jamb 3 with the screws 8 and 18. The screw 18 is in connection with the strike plate 1, the door jamb 3 and the bolt 4. Prior to installing the device according to the invention, the strike plate 1 was fixed to the strike plate 3 with three screws of the same type 8. After installing the device according to the invention, one of said screws has possibly been replaced by another type 18 for fixing the strike plate 1 to both the door jamb 3 and the bolt 4. It might be necessary to expand a hole in the door jamb 3 for fitting the screw 18 that matches the transversal hole 13 in the bolt 4.
  • Fig. 1 and fig. 2 show installation of the device according to the invention wherein the cylinder shaped nut 6 is inserted from the side 11 of the door jamb 3. The nut 6 can just as well be inserted from the side 10 of the door jamb 3 providing the same protection to the strike plate 1.
  • In the case of securing a locking system of a mounted door or window by applying the method and the device according to the invention, the nut 6 can be installed from the side 10 of the frame 3, because the opposite side 11 is typically facing a wall and is thereby inaccessible. After installation of the device according to the invention, the hole in the frame 3 with the nut 6 can be covered by e.g. joint filler to hide the appearance of the device according to the invention.
  • In the cases of e.g. preassembled door jambs or window frames which are yet to be mounted, the side 11 of the frame 3 is accessible. Inserting the nut 6 from the side 11 provides an installation of the device according to the invention, which is completely hidden from the outside after installation in said door jamb or window frame.
  • When brute force is applied to enter the locked door in fig. 1, the forces will be distributed to the nut 5 providing increased protection against forced entry, compared to a situation where the strike plate is merely affixed to the door jamb. In the latter situation it is highly likely the door jamb will break along the dotted line 19 when brute force is applied to the door. Applying the device according to the invention eliminates this weak point 19 in the door jamb 3.

Claims (9)

  1. A method for securing a metal plate (1) fixed to a frame (3) comprising the steps of,
    - drilling a first hole into the front (12) of the frame (3) substantially perpendicular to said frame (3) in a position aligned with at least one of the screws (8, 18) fixing the plate (1) to the frame (3),
    - drilling a second hole into the frame (3) either from one side (10) of the frame (3) or from another side (11) of the frame (3), said second hole being substantially perpendicular to said first hole and being in connection with said first hole,
    - inserting a cylinder shaped nut (4) into the second hole, said nut (4) provided with a slot (7) at least at the end now facing out of the hole,
    - inserting the distal end of a substantially elongated cylinder shaped bolt (5) into said first hole, said bolt (5) comprising a slot (6) at the proximal end, a transversal hole (13) close to said proximal end and a thread (9) at the distal end, said transversal hole (13) preferably threaded,
    - bringing the bolt (4) in connection with the cylinder shaped nut (5), and
    - fastening the plate (1) to the frame (3) with first screw(s) (18) and/or second screw(s) (8), said first screw(s) (18) passing through the transversal hole (13) thereby bringing said plate (1) in connection with the bolt (4).
  2. A method according to claim 1, wherein said method is applied more than one time for the same plate (1), thereby bringing the plate (1) in connection with more than one bolt (4).
  3. A method according to claims 1 and 2, comprising the step of removing the plate (1) from the frame (3) by loosening the first screws (8) which fix the plate (1) to the frame (3).
  4. A device for securing a metal plate (1) fixed to a frame (3), comprising
    - a substantially elongated bolt (4), preferably cylinder shaped, said bolt (4) comprising a proximal end with a slot (7), a transversal hole (13) close to said proximal end and a distal end with a threading (9), said transversal hole (13) preferably being threaded,
    - a cylinder shaped nut (5) with a slot (6) at one end and a transversal threaded hole, said hole of said nut (5) matching the bolt (4), and
    - a screw (18) matching the transversal hole (13).
  5. A device according to claim 4, wherein the threading (9) extends over the entire length of the bolt (4).
  6. A device according to claims 4 to 5, wherein the device is partly or fully made of corrosion resistant metal, such a stainless steel.
  7. A device according to claims 4 to 6, wherein the slot(s) (6) at the nut (5) is the flat-head type providing visible angular orientation of the nut (6) inside a hole.
  8. A device according to claims 4 to 7, wherein the nut (5) is provided with slots (7) at both ends.
  9. A device according to claims 4 to 8, wherein the slots (6, 7) can be any combination of flat-head slots, cross-slots, torx slots, hexagonal sockets or any other type of screwdriver slots.
EP07119474A 2007-10-29 2007-10-29 Method and device for securing a metal plate fixed to a frame Withdrawn EP2055868A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07119474A EP2055868A1 (en) 2007-10-29 2007-10-29 Method and device for securing a metal plate fixed to a frame

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07119474A EP2055868A1 (en) 2007-10-29 2007-10-29 Method and device for securing a metal plate fixed to a frame

Publications (1)

Publication Number Publication Date
EP2055868A1 true EP2055868A1 (en) 2009-05-06

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ID=39364068

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07119474A Withdrawn EP2055868A1 (en) 2007-10-29 2007-10-29 Method and device for securing a metal plate fixed to a frame

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EP (1) EP2055868A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2613267A1 (en) * 1976-03-27 1977-09-29 Fliether Fa Karl Angle profile lock striker plate - is clamped on frame with screws into anchoring plugs for additional security
US4474394A (en) * 1982-08-25 1984-10-02 Alois Crepinsek Reinforced assembly of strike plate to door frame
GB2200677A (en) * 1987-02-04 1988-08-10 Surelock Mcgill Limited Hinge bolt assembly
DK165422B (en) * 1981-04-29 1992-11-23 Niels Kjeld Andersen Method of reinforcing and fixing a striking plate or a hinge and set of parts for performing the method
DE9416449U1 (en) * 1994-10-13 1996-02-15 Gretsch Unitas Gmbh Angular striking plate for a door
AT6289U1 (en) * 2002-09-06 2003-07-25 Keo Kuratorium Fuer Einbruchsc SAFETY FIXING

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2613267A1 (en) * 1976-03-27 1977-09-29 Fliether Fa Karl Angle profile lock striker plate - is clamped on frame with screws into anchoring plugs for additional security
DK165422B (en) * 1981-04-29 1992-11-23 Niels Kjeld Andersen Method of reinforcing and fixing a striking plate or a hinge and set of parts for performing the method
US4474394A (en) * 1982-08-25 1984-10-02 Alois Crepinsek Reinforced assembly of strike plate to door frame
GB2200677A (en) * 1987-02-04 1988-08-10 Surelock Mcgill Limited Hinge bolt assembly
DE9416449U1 (en) * 1994-10-13 1996-02-15 Gretsch Unitas Gmbh Angular striking plate for a door
AT6289U1 (en) * 2002-09-06 2003-07-25 Keo Kuratorium Fuer Einbruchsc SAFETY FIXING

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