EP3095933B1 - Lock with hook bolt - Google Patents

Lock with hook bolt Download PDF

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Publication number
EP3095933B1
EP3095933B1 EP15168182.2A EP15168182A EP3095933B1 EP 3095933 B1 EP3095933 B1 EP 3095933B1 EP 15168182 A EP15168182 A EP 15168182A EP 3095933 B1 EP3095933 B1 EP 3095933B1
Authority
EP
European Patent Office
Prior art keywords
lock
hook bolt
bolt
cross
section
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.)
Active
Application number
EP15168182.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3095933A1 (en
Inventor
Fredrik Pärus
Lars Jensen
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.)
Assa Abloy Opening Solutions Sweden AB
Original Assignee
Assa AB
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 Assa AB filed Critical Assa AB
Priority to EP15168182.2A priority Critical patent/EP3095933B1/en
Priority to PL15168182T priority patent/PL3095933T3/pl
Priority to LTEP15168182.2T priority patent/LT3095933T/lt
Priority to DK15168182.2T priority patent/DK3095933T3/en
Publication of EP3095933A1 publication Critical patent/EP3095933A1/en
Application granted granted Critical
Publication of EP3095933B1 publication Critical patent/EP3095933B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B63/00—Locks or fastenings with special structural characteristics
    • E05B63/0013—Locks with rotary bolt without provision for latching
    • 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
    • E05B15/10—Bolts of locks or night latches
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B17/00—Accessories in connection with locks
    • E05B17/20—Means independent of the locking mechanism for preventing unauthorised opening, e.g. for securing the bolt in the fastening position
    • E05B17/2084—Means to prevent forced opening by attack, tampering or jimmying
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B9/00—Lock casings or latch-mechanism casings ; Fastening locks or fasteners or parts thereof to the wing
    • E05B9/002—Faceplates or front plates
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B9/00—Lock casings or latch-mechanism casings ; Fastening locks or fasteners or parts thereof to the wing
    • E05B9/02—Casings of latch-bolt or deadbolt locks

Definitions

  • the invention relates to a lock of the hook-bolt type in which the latch or look bolt has a hook-shape and engages as such in a striking plate.
  • the lock according to the invention can be used in various types of locks such as espagnolettes or other types of multi point or single point locks. Due to the strong and stable nature of the lock it may be possible to use the lock in a single lock system.
  • Locks of the described type are used in e.g. entrance doors, security doors, balcony doors and windows.
  • Such locks typically comprise a lock housing or lock case in which at least one follower, for example a handle or key follower, is arranged.
  • the handle or key follower is coupled to one or more lock bolts via a follower interface.
  • the lock bolt can be moved by the follower from an unlocked position into a locked position and back by means of operating the handle or key follower. In the locked position the lock bolt extends through or passes over the forend of the lock and is engaged in a striker plate in the doorframe.
  • hook-shaped bolts as lock-, latch- or dead bolts and to arrange a bolt opening in the forend, which allows the lock bolt to extend through the forend in the locked position.
  • the hook bolt is moved from the unlocked into the locked position it is pivoted so that the free end of the hook can engage deeply in the striker plate.
  • the lock bolt transfers the forces to the lock case, the forend and the striker plate.
  • the transferred forces may result in deformations or failure of the bolt, the striker plate, the lock case and/or the forend.
  • the forces result in compressive, shear and tensile stress within the material.
  • EP 0 634 552 A1 discloses a lock comprising a hook bolt and a forend with a rectangular bolt opening, configured to let the hook bolt extend through in a locked position.
  • GB 2496992 A discloses a lock assembly comprising a lock casing and a hook bolt which is pivotally movable between a retracted and an extended position.
  • the hook bolt has a tapered cross section such that, at the point at which it extends from the casing, its width as measured parallel to the pivot axis is at its greatest at the mid-point and narrower at the ends, such that the cross section is oval shaped.
  • espagnolette lock comprising a main lock and an auxiliary lock connected to the main lock by a drive rod.
  • the auxiliary lock comprises a pivotal hook bolt exhibiting a conically tapering cross section.
  • the lock casing is usually composed by countersunk bolts whereby the material of the lock casing is weakened around the screw apertures of the lock case.
  • the screw apertures are turned, drilled or milled, which means material is locally removed to achieve a conical shape around the screw apertures so that the countersunk bolts can be fully inserted and screwed in. This may result in local weak points around the screw apertures.
  • Another object is to provide such a lock which is strong and secure.
  • a further object is to provide a lock of this kind that is difficult to force and destroy.
  • Another object is to provide a lock of this kind, which requires considerable efforts to be destroyed or opened by an unauthorized person.
  • a further object is to provide a lock of this kind, which has a reduced amount of points of failure.
  • a still further object is to provide such a lock which presents a comparatively low friction between the hook bolt and the forend and striking plate respectively during movement of the hook bolt between its retracted and extended position.
  • One more object is to provide a lock that is economic and in which the best possible stability is achieved by optimized material use.
  • the lock comprises a hook bolt which is mounted in the lock, pivotally movable about a pivotal axis, between a retracted position and an extended position and a forend exhibiting a bolt opening, through which the hook bolt extends in the extended position.
  • a lock mechanism is connected to the hook bolt for driving the hook bolt between the retracted and the extended position.
  • the hook bolt exhibits a first cross section which, in the extended position, is arranged in a plane of the bolt opening and which exhibits an inner portion and an outer portion, said inner portion being arranged closer to the pivotal axis than said outer portion.
  • the inner portion of the first cross section is generally rectangular and the outer portion of the first cross section is outwardly tapering
  • the lock further comprises a guiding cam having a shape that closely corresponds to the shape of the outer portion of the first cross section, which guiding cam is arranged inside the lock to guidingly receive a radially outward portion of the hook bolt during movement between the retracted and the extended position.
  • Such a design of the hook bolt has proven to effectively reduce shear forces both in the hook bolt and the forend around the bolt opening, especially in a region having low material thickness.
  • the special design of the hook bolt thus allows constructing a lock with a high degree of security in relation to the amount of material used for forming the hook bolt and the forend.
  • the outwardly tapering first cross section's outer portion further provides a comparatively low friction between the hook bolt and the forend and striker plate respectively, during movement of the hook bolt between its retracted and extended positions. Especially at high seal pressures, this allows for that the hook bolt may be moved between its locked and unlocked positions by applying only moderate forces and torques to the locking mechanism and the followers arranged to operate the hook bolt.
  • the outer portion of the first cross section may be generally V-shaped.
  • the angle of such a V-shape may preferably lie between 25 and 35°.
  • the outer portion of the first cross section may exhibit an outer curved edge.
  • the radius of such a curved edge may lie between 2 and 5 mm, preferably at approx. 3 mm.
  • the inner portion of the first cross section may exhibit curved inner corners.
  • the edges of the first cross section may be curved at the transition between the inner portion and the outer portion.
  • the hook bolt may exhibit a circular arc having a constant distance to the pivotal axis and extending from the first cross section towards the free end of the hook bolt and wherein the hook bolt exhibits a region having a constant thickness radially inwards of said circular arc and an outwardly tapering thickness radially outwards of said circular arc.
  • the hook bolt may exhibit a rear portion which, in the extended position, is arranged inside the lock, which rear portion exhibits a thickness which is larger than the thickness at the first cross section.
  • the transitions between the thickness defined by the first cross section and the thickness of the rear portion may be curved at opposed side surfaces of the hook bolt.
  • the radius of such transitions may lie between 10 and 20 mm, preferably at approx. 15 mm
  • the shape of the bolt opening may closely correspond to the shape of the first cross section.
  • the guiding cam may form part of a mounting component which is fixed to a lock case of the lock.
  • the mounting component may be mechanically connected to a pivot axle of the hook bolt in order to form a rigid bolt unit.
  • the hook bolt may be shaped as a beak with a protruding beak forefront. Such a shape may increase the strength and resistance of the hook bolt.
  • the hook bolt may be configured to be received in the lock with a slight play. This may ensure a smooth operation of the hook bolt and thus the lock mechanism.
  • the lock case may comprise a first and second opening, whereby a first play between the bolt opening and the hook bolt, in the extended position, is the same as a second play between the first and second openings and the hook bolt, which is again the same as a third play between the hook bolt and a frame of the bolt unit, which is once again the same as a fourth play between the guiding cam portion and the hook bolt.
  • a lock 1 comprises a lock case 13, a bolt unit 2 and a lock mechanism 6.
  • the bolt unit 2 as best illustrated in figure 6 , comprises a hook bolt 8, a mounting component 10 exhibiting a guiding cam 10a and a frame 12.
  • the hook bolt 8 is rotatably received by the frame 12.
  • the mounting component 10 is fixedly connected to the frame 12 so that the guiding cam 10a may guide the hook bolt 8 during a pivoting movement from a retracted position to an extended position and back, as for example illustrated in figures 2 and 3 .
  • the guiding cam 10 a is configured to receive a lower periphery of the hook bolt 8, said periphery extending more or less over the entire length of the hook bolt 8.
  • the guiding cam 10a is configured to support the hook bolt 8 and to spread and distribute side and shear forces, when the hook bolt 8 is in the extended position and when somebody tries to force the lock.
  • the mounting component 10 and guiding cam 10a are shaped as a cradle in which the hook bolt 8 may engage.
  • the frame 12 is configured to hold the hook bolt 8 and the mounting component 10 together and in position in the lock case 13.
  • the bolt unit 2 may be configured to form a unit which in itself is a complete assembly unit designed to be used in various lock types, wherever suitable.
  • the bolt unit 2 is herein illustrated by means of a single bolt lock, it may however be used in various locks. It is possible to use two or more bolt units 2 per lock. Further, the bolt unit 2 may constitute a modular part that forms part of a modular production system.
  • the hook bolt 8 is shaped as a hook or more in detail as a beak and it comprises a protruding beak forefront 26 and rounded edges 22.
  • the hook bolt 8 is pivotally fixed to the frame 12 and the lock case 13 by means of a pivot element 38. It is possible and falls within the scope of the invention to make the hook bolt 8 out of one single piece of a material or to make it out of several pieces, which may even comprise various materials.
  • the hook bolt 8 further comprises a complementary follower interface 24 which may be in the form of a sprocket sector, as best illustrated in figures 1 to 3 and 6 .
  • the hook bolt 8 does not comprise any sharp edges, at least not in a region that is configured to engage in a striker plate of a door frame (not shown).
  • the hook bolt 8 comprises a specially shaped cross section along its periphery that is configured to engage the guiding cam 10 a.
  • the mounting component 10 comprises at least one fixing sleeve 44 with a fastening portion 46, which may be a thread portion, as illustrated in figure 1 .
  • the fixing sleeve 44 is configured to have a conical entry part 48 so that a countersunk bolt 36 may smoothly engage the fixing portion in the fixing sleeve 44.
  • the frame 12 comprises two frame plates 42 each exhibiting a seat 28 for receiving a respective protruding end of the hook bolt's 8 pivot element 38, as best illustrated in figures 1 and 6 .
  • the seats 28 and pivot element 38 may for example be a axle/hole combination as best shown in figure 1 .
  • the seats 28, the pivot element 38 and the frame 12, respectively, are configured to receive the hook bolt 8 with a slight, defined play. Such a play may ensure a smooth operation of the hook bolt 8.
  • the frame 12 comprises preferably two side plates 42, which may comprise the complementary pivot elements 28, the side plates 42 being configured to engage the hook bolt 8 via the pivot elements 38.
  • the two frame plates 42 are further configured to engage the guiding mounting component 10, which may form an integral unit together with the fixing sleeve 44.
  • the lock case 13 comprises a first side cover 14 with a first front side 30, a second side cover 16 with a second front side 32 and a forend 18.
  • the first and second side covers 14, 16 each comprise screw apertures 50 and countersunk bolts 36 configured to extend through the screw apertures 50, as best illustrated in figure 1 .
  • the first side cover 14 and the second side cover 16 are connected via the countersunk bolts 36 and a plurality of fixing sleeves 44, as previously described.
  • the screw apertures 50 comprise a conical entry portion, similar to the conical entry portion 48 of the fixing sleeves 44, with the difference that around the apertures 50 no material was removed.
  • the material of the first and second side covers 14, 16, is bent, pressed or stamped so that no local weak point (removed material) is created.
  • the conical entry portion of the apertures 50 may be congruent with the conical entry portions 48 of the fixing sleeves 44 so that the countersunk bolts 36 may completely sink into the first - and second side cover 14, 16, respectively.
  • a cover portion 15 may be arranged, which covers most of the lock case 13.
  • the first and second side cover and the cover portion 15 may comprise passages 64 configured to provide access to the lock 1 for a key follower, a follower handle or the like (not shown).
  • Each fixing sleeve 44 is configured to receive two countersunk bolts 36.
  • the fixing sleeves 44 are further configured to comprise fastening portions 46' that are oriented perpendicular to fastening portions 46 which are configured to connect the first and second side covers 14, 16.
  • the perpendicular oriented fastening portions 46' are configured to connect the forend 18 to the lock case 13, as shown in figure 1 .
  • the first and second front sides 30, 32 may be arranged so that they are parallel to and facing the forend 18, as illustrated in figure 1 .
  • the first and second front sides 30, 32 both comprise openings that are configured to let the hook bolt 8 pass through in the extended position.
  • the shape of the openings in the first 30 and second 32 front sides may have a shape that is identical with the shape of the bolt opening 34 in the forend.
  • the openings in the first 30 end second 32 front sides differs from the shape of the bolt opening,
  • the first and second front sides 30, 32 of the lock case 13 provides additional stability to the lock 1.
  • the hook bolt 8 exhibits a first cross section A which is arranged in a plane of the bolt opening 34, when the hook bolt 8 is in its fully extended locking position.
  • the first cross section A exhibits an inner portion 52 and an outer portion as seen from the pivotal axis for the hook bolt 8, which pivotal axis is defined by the pivotal element 38 (see fig 4a ).
  • the pivotal axis extends horizontally in a plane which is parallel to the plane of the bolt opening.
  • the inner portion 51 of the first cross section is thus arranged closer to the pivotal axis than the outer portion 54, throughout the pivotal movement of the hook bolt 8.
  • the inner portion 52 is shaped generally as a rectangle having rounded inner corners 52'.
  • the outer portion of the first cross section A tappers outwardly, i.e. in the direction away from the pivotal axis.
  • the outer portion 54 thus forms a V-shape which, in the shown example presents a V-shape angle between the side lines of the cross section of approx. 29°.
  • the V-shape angle may however be varied, preferably between approx. 25° and 35°.
  • the outer portion 54 exhibits a curved edge.
  • the curved edge 54' exhibits a radius of approx. 3 mm. The radius may however be varied, preferably between 1 and 5 mm.
  • the side lines or side edges defining the first cross section A are further curved at the transition between the inner 52 and outer 54 portions.
  • the hook bolt hook is symmetric with respect to a vertical symmetry plane which extends centrally through the hook bold and which is arranged perpendicular to the pivotal axis. I.e. the pivotal axis is arranged normal to the symmetry plane.
  • the hook bolt 8 further exhibits, on both side surfaces, a circular arc 56 having a constant distance to the pivotal axis and extending from the first cross section A towards the free end of the hook bolt 8. Radially inwards of this circular arc 56, the hook bolt exhibits an inner region 56' having a constant thickness. The thickness of the hook bolt at the inner region 56' is thus equal to the thickness or width of the first cross section A at the inner generally rectangular portion 52. Radially outward of the circular arc 56, the hook bolt presents an outer region 56" with an outwardly decreasing thickness.
  • the hook bolt 8 further exhibits a rear portion 57 which, in the extended position, is arranged inside the lock.
  • the rear portion 57 exhibits a thickness which is larger than the thickness of the inner region 56' and, thus than the maximum width of the first cross section A.
  • transitions 57' between the thickness at the inner region 56', defined by the first cross section A and the greater thickness of the rear portion 57 are curved at opposed side surfaces of the hook bolt 8.
  • the curvature radius of these transitions 57' are in the shown example approx. 15 mm.
  • the curvature radius may however vary, but are preferably kept between 10 and 20 mm.
  • Fig. 4b illustrates how the bolt opening 34 is configured to let the hook bolt 8 extend there through in the extended position and to retract from the extended position into the retracted position.
  • the bolt opening 34 and the first cross section A of the bolt 8 have corresponding shapes. In the extended position the first cross section A is arranged in the plane of the bolt opening 34.
  • the above described hook bolt geometry has proven to provide excellent strength and security in relation to the amount of material used for forming the hook bolt.
  • Figs 7a and 7b illustrates the von Mises stress distribution over two different hook bolts being subject to an equal load.
  • Fig. 7a shows the stress distribution at a previously known hook bolt having generally the shape as disclosed in GB 2496992 A and fig. 7b illustrates the corresponding distribution at a hook bolt according to the present invention.
  • a higher darkness intensity represents a higher stress.
  • the hook bolt according to the invention exhibits significantly smaller regions experiencing high stress than the previously known hook bolt.
  • the inventive hook bolt thus provides a significantly higher degree of protection against attempts to force the lock, e.g. by inserting a crow between the door and frame and thereafter applying a bending force.
  • the locking mechanism 6 comprises a follower 20, follower interface 40 and a guide plate 60.
  • the follower interface 40 is configured to engage in the complementary follower interface 24 of the hook bolt 8.
  • the complementary follower interface 24 and the follower interface 40 may each comprise a set of two parallel sprocket sectors 58 which are spaced apart.
  • the sprocket sectors 58 of the follower interface 40 are spaced apart by the guide plate 60, as best illustrated in figure 1 , 4b and 5d .
  • the two sprocket sectors 58 of the complementary follower interface 24 may be spaced apart but by a gap 62, said gap 62 being configured to receive the guide plate 60, as best illustrated in figures 1 , 4b and 5d .
  • Such an engagement between the gap 62 and the guide plate 60 provides additional sideways-stability to the look mechanism 6.
  • the complementary follower interface and the follower interface may comprise a plurality of parallel sprocket sectors and that the invention is not limited to two parallel sprocket sectors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
  • Lock And Its Accessories (AREA)
EP15168182.2A 2015-05-19 2015-05-19 Lock with hook bolt Active EP3095933B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP15168182.2A EP3095933B1 (en) 2015-05-19 2015-05-19 Lock with hook bolt
PL15168182T PL3095933T3 (pl) 2015-05-19 2015-05-19 Zamek z ryglem hakowym
LTEP15168182.2T LT3095933T (lt) 2015-05-19 2015-05-19 Užraktas su kablio formos stūma
DK15168182.2T DK3095933T3 (en) 2015-05-19 2015-05-19 Lock with garden bolt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15168182.2A EP3095933B1 (en) 2015-05-19 2015-05-19 Lock with hook bolt

Publications (2)

Publication Number Publication Date
EP3095933A1 EP3095933A1 (en) 2016-11-23
EP3095933B1 true EP3095933B1 (en) 2018-07-18

Family

ID=53180629

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15168182.2A Active EP3095933B1 (en) 2015-05-19 2015-05-19 Lock with hook bolt

Country Status (4)

Country Link
EP (1) EP3095933B1 (lt)
DK (1) DK3095933T3 (lt)
LT (1) LT3095933T (lt)
PL (1) PL3095933T3 (lt)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3200843A1 (de) * 1982-01-14 1983-07-21 Winkhaus Fa August Verriegelungsbeschlag
WO2005003494A1 (en) * 2003-07-04 2005-01-13 Yarra Ridge Pty Ltd Locks
DE202008009023U1 (de) * 2008-07-07 2009-11-12 Kfv Karl Fliether Gmbh & Co. Kg Verschluss für Fenster oder Türen
SE533488C2 (sv) * 2009-02-27 2010-10-05 Assa Ab Låsanordning med spärrfunktion för förhindrande av manipulation
SE1250268A1 (sv) * 2012-03-20 2013-08-27 Assa Oem Ab Förstärkt låsanordning

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DK3095933T3 (en) 2018-10-29
PL3095933T3 (pl) 2019-01-31
EP3095933A1 (en) 2016-11-23
LT3095933T (lt) 2018-10-25

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