FR3064656A1 - PEN FOR LOCK - Google Patents

Abstract

The present invention relates to retractable lock bolts including said half-turn capable of diving into a keeper. The bolt is characterized essentially by the fact that it comprises a solid piece 10 having an end face 12 in pan inclined relative to a first direction D1 determined, and resilient damping means mounted in cooperation with the part 10, constituted by a wedge 20, means for mounting the wedge 20 in translation relative to the solid piece 10 between a rest position and an active position retracted, and vice versa, and elastic means 22 mounted in cooperation between the piece 10 and the wedge 20 to tend to keep the corner in its rest position.

Description

® FRENCH REPUBLIC

NATIONAL INSTITUTE OF INDUSTRIAL PROPERTY © Publication number:

(to be used only for reproduction orders)

©) National registration number

064 656

70334

COURBEVOIE © IntCI ⁸ : E 05 B 15/10 (2017.01)

PATENT INVENTION APPLICATION

A1

©) Date of filing: 03.04.17. (© Priority: © Applicant (s): AU FORUM DU BATIMENT— FR. @ Inventor (s): PERINET PATRICE. ©) Date of availability of the request: 05.10.18 Bulletin 18/40. ©) List of documents cited in the preliminary search report: See the end of this booklet (© References to other related national documents: ® Holder (s): AT THE BUILDING FORUM. ©) Extension request (s): (© Agent (s): ABRITT.

LOCK FOR LOCK.

FR 3 064 656 - A1

The present invention relates to retractable lock bolts, in particular said half-turn capable of plunging into a strike.

The bolt is essentially characterized by the fact that it comprises a solid part 10 having an end face 12 in an inclined plane relative to a first determined direction D1, and elastic damping means mounted in cooperation with the part 10, constituted by a wedge 20, means for mounting the wedge 20 in translation relative to the solid part 10 between a rest position and an active retracted position, and vice versa, and elastic means 22 mounted in cooperation between the part 10 and the wedge 20 to tend to keep the wedge in its rest position.

LOCK FOR LOCK

The present invention relates to bolts for locks, in particular those which technicians are used to designating under the term "retractable U-bolts".

The retractable or spring-loaded latch bolt is part of a lock. Its tip is beveled and it is possible to move it back and forth without using, for example, a key. The bolt is actually part of a lock that slides under the action of a handle control or an external force, so that it can be inserted into a corresponding strike. The bolt therefore makes it possible, by blocking in the strike, to prevent the door from opening when it is closed.

A lock is mounted in the lateral edge of a door leaf, while a keeper is arranged in a door jamb so that, so that the door can close an opening delimited by at least the jamb, the half bolt -turn comes to engage inside the keeper via its bevelled end face.

U-bolts are already known, for example those described in FR 2 927 644 and 2 770 869. They are capable of plunging into a keeper and make it possible to avoid premature wear of their beveled end face when the door in particular closes alone, this wear being due to friction between the bevelled face and the outer edge of the keeper. These bolts also make it possible to avoid the annoying noise caused by clicking on the edge of the strike.

The U-bolt described in FR 2 927 644 comprises, emerging from the housing of a lock, essentially a prismatic free end having an inclined sliding face intended to cooperate inside the corresponding keeper, a pivoting member mounted in rotation around a shaft inside the prismatic free end and having a projecting part of the inclined sliding face, and a spring mounted between the pivoting member and the prismatic part, this spring tending to hold this part of the pivoting member projecting from the sliding face.

Thus, when the prismatic free end of the U-bolt comes into contact with the edge of the striker, the projecting part of the pivoting member comes to bear against the outer edge of this striker which pivots by compressing the spring. It thus acts as a shock absorber, which allows the sliding face to come into contact with the outer edge of the strike at a lower speed. The contact between the bolt and the keeper is therefore generally made without noise, if not with a very low noise, further reducing friction, and therefore wear.

This latch bolt according to this prior art gives good results, but has drawbacks, in particular the fact that it comprises a rotation shaft around which the pivoting member pivots. It is therefore necessary to oversize this rotation shaft so that it resists impact and does not break under the effect of repeated impact. In addition, it therefore exhibits relatively rapid wear.

Furthermore, the mounting of this pivoting element requires manual operations to assemble the free end, the pivoting element and the rotation shaft together. Therefore, the cost price for the manufacture of the latch bolt is relatively high.

Also, the present invention aims to provide a bolt for lock, in particular said "retractable latch bolt", which largely overcomes the drawbacks mentioned above of similar bolts of the prior art.

More specifically, the subject of the present invention is a retractable lock bolt, in particular known as a U-turn, capable of plunging into a keeper, said bolt comprising a solid part having an end face in a pan inclined with respect to a first determined direction. , and elastic damping means mounted in cooperation with said solid part, characterized in that said elastic damping means are constituted by:

• a wedge, • means for mounting said wedge in translation relative to said solid part between a rest position and an active retracted position, and vice versa, and • elastic means mounted in cooperation between said solid part and said wedge for tensioning maintaining said corner in its rest position.

Other characteristics and advantages of the present invention will appear during the following description given with reference to the drawings annexed by way of illustration, but in no way limiting, in which:

Figures 1 and 2 show, in perspective view, a preferred embodiment of the bolt according to the invention, Figure 1 being an exploded view of this bolt, Figure 2 a view of the bolt completely assembled.

It is firstly specified that, in the figures, the same references designate the same elements, regardless of the figure on which they appear and whatever the form of representation of these elements. Likewise, if elements are not specifically referenced in one of the figures, their references can be easily found by referring to the other figure.

It is also specified that the figures represent only one embodiment of the object according to the invention, but that there may be others which meet the definition of this invention.

It is further specified that, when, according to the definition of the invention, the object of the invention comprises “at least one” element having a given function, the embodiment described may include several of these elements. Conversely, if the embodiment of the object according to the invention as illustrated comprises several elements of identical function and if, in the description, it is not specified that the object according to this invention must necessarily include a number particular of these elements, the subject of the invention could be defined as comprising “at least one” of these elements.

It is specified that when, in the present description, an expression alone defines, without any specific mention relating to it, a set of structural characteristics, these characteristics can be taken, for the definition of the object of the protection requested, when this is technically possible, either separately or in total and / or partial combination.

It is finally specified that, in the present description, if the adverb substantially is associated with a qualifier of a given means, this qualifier must be understood in the strict sense or approximated.

The two appended figures illustrate a preferred embodiment of the retractable lock bolt according to the invention.

The bolt according to the invention comprises a solid part 10 having an end face 12 in an inclined or slightly rounded pan with respect to a given first direction D1, for example a substantially prismatic or similar part such as that which is illustrated in the figures 1 and 2 attached.

The bolt further comprises elastic damping means mounted in cooperation with the solid part 10.

According to the invention, the elastic damping means consist of a wedge 20 or the like, means for mounting this wedge 20 in translation relative to the solid part 10 between a rest position (FIGS. 1 and 2) and an active retracted position , and vice versa, and elastic means 22 mounted in cooperation between the part 10 and the wedge 20 to tend to maintain this wedge in its rest position.

Preferably, this corner is made of a material such as ** Plastic known under the name Delrin® or the like to reduce friction as much as possible and promote sliding as will be explained below.

According to an advantageous embodiment, the means for mounting the wedge 20 in translation relative to the solid part 10 comprise a housing 25 produced in the solid part, this housing being shaped so that the wedge 20 is able to slide there in a second direction D2 and in addition so that a part 23 of the corner is able to project from the end face 12 of the solid part 10 when the corner 20 is in its rest position.

This projecting part 23 is further shaped so that it has an inclined surface on the first direction D1 along, for example, a substantially oriented slope like that of the beveled end face 12 of the solid part 10, but advantageously according to an angulation slightly greater than that presented by the end face 12 relative to this same first direction D1.

This inclined surface is further defined so that the edge which is the first to cooperate with the keeper when the bolt begins to plunge into it is, in the rest position of the wedge 20, located inside the opening, to avoid that, in the event that it is abrupt, this edge which joins the inclined surface, comes to abut against the edge of the keeper.

This inclined portion 23 capable of projecting from the end face 12 of the solid part 10 can have different shapes, for example substantially beveled. However, preferably, it is shaped, like that illustrated, in at least one portion of convex surface, two portions being even shown in the figures.

To obtain the sliding defined above of the corner 20 in the housing 25, they are both made in a cylindrical non-revolution manner, the cross sections of which in a plane perpendicular to the generatrices enveloping these two cylinders, namely those of the corner and those of the housing (that is to say perpendicular to the second direction D2), are polygonal, for example rectangular or the like.

According to an advantageous embodiment from the industrial point of view in particular, the second direction D2 makes a non-zero angle with the first determined direction D1, optionally and preferably, a right angle, as illustrated.

In addition, quite preferably for optimal operation of the bolt, the means for mounting the wedge 20 in translation relative to the solid part 10 further comprises stop means 26 so that the wedge portion 23 protrudes from the end face 12 of the solid part 10 only of a determined quantity, in particular by those skilled in the art.

Possibly and preferably, these abutment means 26 are constituted by at least one groove made in one of the following elements: wedge, housing, and a complementary rib produced on the other of these two elements, these groove and rib being arranged to slide into one another when the corner slides in the housing, and so that the rib is in the stop position on the bottom of the groove when the corner is in the rest position. Advantageously, to obtain a balance when the wedge slides in the housing, two opposite grooves are provided and therefore two complementary ribs, as illustrated in a relatively visible manner in FIG. 1.

In an entirely advantageous manner, both in terms of the production of the bolt and that of its mounting, the housing 25 consists of a breakthrough passing right through the solid part 10 to lead, by a first end, to the end face 12 of this part 10, and the bolt further comprises a plate 27 for closing at least partially, if not completely, the second end of the breakthrough.

In this case, it is preferable that the elastic means 22 mounted in cooperation between the part 10 and the wedge 20 are constituted by at least one spring acting in compression, optionally two springs mounted in parallel, always to obtain a good sliding balance when the corner slides in the housing. This spring (these two springs) acting in compression is (are) then mounted (s) between the corner 20 and the closure plate 27. This assembly, and disassembly in particular for maintenance operations, is facilitated if this plate 27 is removably attached to the part 10, for example by means of screws or the like.

The bolt according to the invention operates in the following manner, assuming that it is mounted in cooperation with means which allow it to slide, as defined in the preamble to this description, in a known manner by means for example of a fixing lug 14 as illustrated in the figures. The lock which comprises such a bolt with its housing is mounted on a door leaf or the like pivoting in the frame of the door so that the bolt is able to come and plunge into a keeper secured to an amount of this frame.

When the door reaches its closed position, the bolt which emerges from the lock casing abuts against the edge of the striker, the protruding part 23 of the corner 20 coming first into contact with this edge. The corner 20 is then pushed back to its retracted position, against the forces exerted by the springs, the latter damping the speed of rotation of the door relative to the upright. This effect allows greater absorption and diffusion of mechanical forces, hence a reduction in sound effects and wear.

From the description given above, it is obvious that the aims of the present invention are well achieved.

Claims (10)

1. Retractable lock bolt known as a U-turn capable of plunging into a strike, said U-bolt comprising a solid part (10) having an end face (12) substantially in a pan inclined relative to a first direction (D1 ) determined, and elastic damping means mounted in cooperation with said solid part (10), characterized in that said elastic damping means are constituted by: • a wedge (20), • means for mounting said wedge (20) in translation relative to said solid part (10) between a rest position and an active retracted position, and vice versa, and • elastic means (22) mounted in cooperation between said part (10) and said corner (20) to tend to maintain said corner in its rest position. 2. Bolt according to claim 1, characterized in that the means for mounting said corner (20) in translation relative to said solid part (10) comprise a housing (25) produced in said solid part (10), said housing being shaped so that said corner (20) is able to slide therein in a second direction (D2) and so that a part (23) of the corner is able to protrude relative to the end face (12) of said solid part (10) when said corner (20) is in its rest position 3. Bolt according to claim 2, characterized in that said second direction (D2) makes a non-zero angle with said first determined direction (D1), optionally a right angle. 4. Bolt according to one of claims 2 and 3, characterized in that said part (23) of the corner (20) is shaped as an inclined surface and defined so that the edge (29) which is the first to cooperate with the strike when the bolt begins to plunge therein, in the rest position of the corner (20), located inside said breakthrough. 5. Bolt according to one of claims 2 to 4, characterized in that said part (23) of the corner (23) comprises at least one portion shaped as a convex surface (28). 6. Bolt according to one of claims 2 to 5, characterized in that the means for mounting said wedge in translation relative to said solid part (10) further comprise stop means (26) so that said part of corner (23) projects from the end face (12) of said solid part (10) by a determined quantity. 7. Bolt according to claim 6, characterized in that the stop means consist of at least one groove made in one of the following elements: wedge, housing, and a complementary rib produced on the other of these two elements , these grooves and ribs being arranged to slide into one another when said corner slides in said housing and so that the rib is in the abutment position on the bottom of the groove when said corner is in the rest position. 8. Bolt according to one of claims 2 to 7, characterized in that said housing (25) consists of a breakthrough through right through said solid part (10) to open, by a first end, on said end face (12) of said piece (10), and that it further comprises a plate (27) for at least partially closing the second end of the breakthrough. 9. Bolt according to one of the preceding claims, characterized in that the elastic means (22) mounted in cooperation between said part and said corner are constituted by at least one spring acting in compression, optionally two springs mounted in parallel. 10. Bolt according to claim 9 when it depends on claim 8, characterized in that said spring acting in compression is mounted between said wedge (20) and said closure plate (27).