FR2846355A1 - Door handle return mechanism comprises bush with square hole for handle shaft and stop for one end of multi-coil torsion spring - Google Patents

Abstract

The return mechanism consists of a bush (5) with a square hole (53) through it to take the shaft engaging with the door lock follower, and a stop (54) for one end (43) of a multi-coil spring (4), the other end (42) of which is fixed. The stop is in the form of a radial hole in the bush, and the spring end that fits into it is bent radially inwards from one end coil of the spring.

Description

Field of the invention

  The present invention relates to a door handle return device equipped with a mortise lock comprising a return spring connecting (directly or indirectly) the handle to a fixed point of the door to return the handle to the rest position (position horizontal / tilted position) and support the lock spring.

  This return spring mechanism is intended to equip interior and exterior doors provided with mortise locks whatever the type of crutches, crutches on rose, crutches on plate or assemblies mounted on the door.

Prior art

  There are sets, that is to say pairs of stands mounted on cleanliness plates fitted with return springs, and these two parts of the set are fixed to each other by sandwiching 15 the door, with the interposition of the drive square passing through the follower and making it possible to control the lock.

  There are also stands on rosette fitted with springs.

  These sets or crutches on rose fitted with springs 20 exist in the product ranges provided with a cleanliness plate or a rose of a certain thickness to accommodate the spring mechanism for returning crutches. Depending on the case, one or both sides

  of a set are equipped with a return spring.

  But crutch sets on forged iron or brass and porcelain plates cannot be fitted with such mechanisms.

  return springs because the plate is too thin to receive this mechanism.

  Now, precisely, these crutches made of iron, forged brass or porcelain are traditionally heavy and quickly tire the res30 coming out of the lock. After a few months of operation the spring of the

  lock no longer has the strength to raise the stand into a horizontal position which is particularly troublesome from the point of view of appearance. In addition, in extreme cases, the weight exerted by the crutch on the lock drive square can force the bolt of the lock to remain unlocked so that the door no longer closes.

  In summary, it is inconvenient to mount forged iron or brass crutches on doors fitted with a light lock.

  OBJECT, OBJECT AND ADVANTAGES OF THE PRESENT INVENTION The aim of the present invention is to develop a means making it possible to assist the spring of the lock for a door equipped with a relatively heavy crutch in iron, brass or porcelain, for re5 always put in the rest position (depending on the type of installation, this position is at least horizontal if not slightly raised), allowing to be fitted with crutches or sets of crutches which do not themselves have room to accommodate a mechanism with springs and also making it possible to equip locks with "three point" closure, that is to say with a 1o rod controlling different locks installed along the leaf of the

  door and maneuvering by raising the stand in vertical position before locking the rod by the lock.

  To this end, the invention relates to a crutch return device of the type defined above, characterized in that it comprises 15 - a sleeve * provided with a through orifice, of square section, corresponding to that of the square of drive connecting the stand to the lock follower, * intended to be housed in the thickness of the door next to the follower, 20 * having a cylindrical surface provided with a stop, - a torsion spring with at least one turn having a fixed end and a mobile end, this spring being mounted around the sleeve, its fixed end being pressed against the door and its mobile end

against the sleeve stop.

  This return device is installed in the housing traditionally produced in the door, on one side or the other the lock and serving for the passage of the drive square associating the movement of the

  crutch to the follower of the lock.

  In industrial doors, receiving locks at lar30 der, the orifice passing through the door has, in general, a diameter of millimeters, which not only allows the passage of the drive square but also to receive the sleeve and the torsion spring

  of the return device according to the invention.

  The space on either side of the mortice lock in the thickness of the door is sufficient to receive a torsion spring

having a number of turns.

  The return device according to the invention can be provided on one side of the door or on both sides since there is room on both sides

  in the hole reserved for the drive square.

  The choice of fitting a door with one or two positive recall devices depends mainly on the weight of the crutches used.

  This device does not hinder the installation of a plate or a flat rosette like that of crutches in forged iron or brass or even porcelain. This device also makes it possible to simplify the manufacture and 1o the storage of assemblies currently equipped with return mechanisms by eliminating their return mechanism, which constitutes a gain in storage space and reduces the number of models (references) to be manufactured.

and store.

  The device according to the invention also makes it possible to equip so-called "three-point" locks since the support spring, acting from below on the stand does not hinder the raising of the stand in the vertical position for locking the mechanism of this lock "three

points ".

  Finally, the device makes it possible to compensate for the wear of the return spring of the bolt of the lock and to avoid its replacement.

  According to another characteristic, the stop of the sleeve is an orifice and the movable end of the spring is bent to come into

  the hole in the sleeve when the spring is placed on the sleeve.

  The entire sleeve and the spring can be assembled and sold as is, which saves space since the volume of the spring receives the sleeve. It is also possible to offer the two elements separately which allows the use of several types of springs,

  different strength for the same sleeve.

  The orifice of the sleeve which receives the movable end of the spring 30 is directed radially.

  The fixed end of the return spring is directed parallel to the axis of the spring or of the drive square and returns over the turns so as to be able to engage in an orifice made in the

  door next to the drive square opening.

  According to an advantageous characteristic, the sleeve comprises a prestress stop to receive the fixed end of the spring, its movable end being in abutment against the abutment of the sleeve and, after assembly, the fixed end of the spring comes into abutment against a fixed point of

the door.

  This sleeve makes it possible to give the spring a certain prestress without this complicating the installation of the device through the housing of the lock in the orifice of passage of the drive square. Advantageously, in this case, the preload stop is formed by an edge of the sleeve in a position relative to the stop for the movable end of the spring, offset in the direction

  of the prestress to be given to the spring.

  io This preload stop is very easy to use since it is sufficient, before installing the crutch return device in the door, to place the sleeve on the drive square threaded into a crutch, thus holding the assembly and turning the "fixed" end of the spring to pass this end behind the stopper and thereby put the spring in the prestressed state.

  It is also possible to simply modify the degree of prestressing applied to the spring by means of several stops provided on the sleeve. These stops can be associated with the "fixed" end of the spring, but it is even simpler to produce only one stop for the fixed end of the spring and several angularly offset stops for the movable end of the spring since these stops, for the movable end,

  are holes made in the sleeve.

  It is also advantageous to produce the sleeve with a prestress stop in the form of a sleeve in two parts 25 engaged one inside the other, - a part provided with the stop of the movable end of the spring and - a part provided with the stop of the fixed end of the spring, these two parts being able to be assembled in angular positions

  to adjust the spring preload.

  The various sleeves are advantageously made of injected plastic, in particular polyamide so as to constitute a crutch return device, economical, efficient and of silent operation, the possible friction of the turns of the torsion spring on the polyamide sleeve does not generate no noise. 35 Drawings

  The present invention will be described below in more detail with the aid of exemplary embodiments of a baby return device.

  door keel according to the invention, shown in the accompanying drawings in which: - Figure 1 is a sectional view of a door equipped with a mortise lock and two crutches, one according to the prior art, the other according to the invention, - Figure 1A schematically shows the housing of a mortise lock in a door, - Figure 2 is a front view of a door equipped with a mortise lock and a crutch with a crutch return device according to the invention, - FIG. 2A is a view from the right of the orifice of the door and of the orifice receiving the fixed end of the return spring, - FIG. 3A is a front view of the sleeve of the device according to the invention, - Figure 3B is a side view of the sleeve of Figure 3A, - Figure 3C is a sectional view of the sleeve in the receiving position of the spring shown in Figure 4B, FIGS. 4A, 4B respectively show a front view and a side view of a torsion spring of a dis positive according to the invention, - Figure 5 is a view of drilling template for the fixed end of the device spring, - Figure 6A is a side view of a sleeve fitted with a spring, - Figure 6B shows the part of the template of Figure 5, presented in front of the sleeve, in the position of use of the template, - Figures 7A, 7B respectively show a side view and a sectional view of a second embodiment of a sleeve with a prestress stop, - Figure 7C shows a torsion spring capable of being installed on the sleeve with prestress stop of Figures 7A, 7B, - Figure 8A shows, in front view, the establishment of the torsion spring on the sleeve before it is prestressed, - Figure 8B is a side view of Figure 8A, - Figure 9A is a view of the sleeve and the torsion spring, the fixed end of which has been placed in position prestressing, - Figure 9B is a side view corresponding to the figur e 9A, - FIGS. 10A, 10B, 10C respectively show a front view, a top view and a side view of part of a prestressing abutment sleeve according to an alternative embodiment, - Figures ilA, ilB, 11C show respectively a front view, a top view and a side view of the second part of the sleeve with prestress stop, completing the first part of the figures

1OA-10C,

  - Figure 12A is a front view of a drilling template for a prestressing sleeve, - Figure 12B is a sectional view of the drilling template installed in the template plate, - Figure 13A is a scale view enlarged of the hole made with the drilling template, FIG. 13B is a sectional view of a door showing the hole made

with the drilling template.

  Description of various embodiments of the invention

  According to FIG. 1, the invention relates to a device intended to equip a mortise lock SL integrated in a door P and controlled by means of a square section rod (drive square) 2 by a pair of crutch 1, 1 '. The upper half of the horizontal section of FIG. 1 through the door part of the mortice lock (represented only by a rectangle) and the crutch 1 'corresponds to a known device whereas the lower half of this same view in chopped off

corresponds to the invention.

  FIG. 1A shows, in perspective, a door P with the mortice lock S and the two orifices OR in the axis of the lock follower for the passage of the drive square connected to the crutches and controlling the bolt PE.

  Currently, there are, as already indicated in the preamble, crutches 1 'equipped with a rosette or a cleanliness plate 3', having a certain thickness or a form of housing making it possible to accommodate a spring mechanism 4 ', reminders which, on the one hand, bears on the housing 3 'and, on the other hand, on the groove made for this purpose in the stand to assist the not shown spring of the lock, in the event of

relatively heavy stand 1 '.

  Figure 1 also shows the follower F, crossed by the square 2.

  The mechanism with its spring 4 'is housed outside the

  door panel P or, more precisely, the orifice or hole OR ', through which the drive square 2 passes.

  According to the invention, there is a device comprising a spring 4, housed in the orifice OR for passage of the drive square 2, without protruding from the side of the door P, allowing the application of the cleanliness plate or the rosette 3 of the crutch 2 against the panel, for example in the case of a traditional cleanliness plate carrying or not a heavy crutch for which the spring of the mortise lock SL would not be sufficient and accepting the passing of the end of the crutch in the OR port, which is sometimes the case with crutches mounted on plates or rosettes

say "right".

  This device comprising the spring 4 will be described so

more detailed below.

  Figure 2 is a front view of the mortise lock SL showing in particular, its front plate FR for fixing the mortise lock by the two screws Vl, V2. This figure shows the handle 1, the car15 re 2 and the device according to the invention formed by the spring 4 and the sleeve 5 integrated in the thickness of the door in the orifice OR, between the lock follower and the external face. of the door, the assembly being covered by the

plate 3.

  FIG. 2A is a view from the right of the door P showing the orifice R for passage of the drive square and an orifice 6 for receiving

  the fixed end of the spring 4 as will be seen below.

  The device according to the invention is shown in its parts, in more detail, in Figures 3A-6A.

  FIGS. 3A-3C show an embodiment of a sleeve 5 formed of a cylindrical body 51 provided with an edge 52. This sleeve is crossed by a hole 53 of square section corresponding to the section of the drive square 2. It also includes an orifice 54, preferably radial, intended to receive the movable end of the torsion spring.

  The torsion spring 4 is shown in Figures 4A-4B. This torsion spring 4 has several turns 41 and ends with a so-called fixed end 42 and a so-called movable end 43 with reference to the position and operation of the torsion spring once installed in the door.

  The fixed end 42, coming from a turn by a radial branch 42-1, is curved and in the form of a branch parallel to the axis XX of the spring which is also that of the sleeve 5 and that of the follower of the ser-

  rure. This curved end 42-2 returns over the turns to

  lodge in hole 6 drilled in the door (figure 2A).

  The spring 4 is first installed on the sleeve 5 as shown in Figure 6A. For this, the movable end 43 of the spring is housed 5 in the orifice 54 of the sleeve 5 and the turns 41 surround the body 51 of the sleeve 5.

  To make the hole 6, we proceed with the following material: we install the template 7 with its appropriate hole 72 or 73 on the drive square 2 fitted to the stand 1 then we engage the square in 10 the follower and we drill with the hole drilling position. It is enough to drill for this through the orifice 71 of the template 7. The same procedure applies for a square of 7 millimeters. In this case, we place the template 7 with its orifice 73 on the square before engaging it in the follower and we drill at

  between the axis d with the orifice 71 of the template 7.

  The assembly formed by the spring 4 and the sleeve 5 is then

  ready to be installed in the OR orifice of door P (figure 2). For this, the SL lock is dismantled by detaching the screws Vi, V2 (after obviously having extracted the drive square 2). Then, through the housing thus released from the mortise lock SL, passing through the edge of the door, the assembly (4, 5) is added into the housing OR by making the end 42 penetrate into the bore 6.

  Then, we put back the mortise lock SL by fixing it with the screws Vl, V2. It is then possible to install the stands. For this, we introduce the stand to which the square 2 was previously fixed by tightening the needle screw 11. We then engage the end of the drive square 2 in the square section hole 53 of the sleeve 5 and we pivot the square by playing on the handle to introduce the square

  in the lock follower.

  In fact, it is first necessary to put the spring 4 in prestressing 30 by proceeding as follows: the drive square 2 is introduced into the orifice 53 not in the normal position of the stand 1, that is ie the horizontal or substantially horizontal position but in a position turned 900 upwards, then the crutch is pivoted by 900 with its square engaged in the sleeve 5 without being at this moment 35 engaged in the follower, by 90 to put the stand in horizontal position. We can then engage the square in the follower itself provided with a hole of square section and oriented in the rest position so that, in this position, the stand 1 is horizontal. In certain types of locks, the practice wants that the crutch is inclined slightly upwards, position which is nevertheless assimilated to the horizontal position or position

  rest of the stand according to the term of this description.

  To precisely position the bore 6 with respect to port 5 to the axis XX of the lock, a template 7 is used like that shown in FIG. 5. This template 7 has an orifice 71 of section equal to that of the orifice 6 to be drilled and, on either side of this orifice 71, the square orifice 72, 73 having respectively an edge of 8 and 7 millimeters depending on the type of drive square for which the larding lock is provided. 10 The center distance (d) between the orifice 71 and the center of the squares 72 or 73 is equal to the center distance (d) (Figure 4B) separating the axis XX from the end

fixed 42 of spring 4.

  FIGS. 7A-9B show a second embodiment of a crutch return device according to the invention. This device allows the spring to be prestressed relative to the front sleeve.

  installation of the assembly in the door.

  Figures 7A-7B show a sleeve 105 corresponding to its second embodiment. This sleeve consists of a body 151 provided with a flange 152, a square hole 153 to receive the drive square (this hole is in the section of the square, usually 7 or 8 mm in diameter). fish bone). The sleeve also has one or

two orifices 154, 154 '.

  The rim 152 occupies only part of the periphery of the sleeve 105 and it is provided with a notch 155 forming a pre-stress stop for the fixed end of the spring under the conditions described below.

  The spring 4 combined with this sleeve 105 is identical to the spring already described; it comprises a certain number of turns 41 and ends in a movable end 43 and a fixed end 42. The fixed end 42 comprises a radial branch 42-1 and an axial branch 42-2, the latter being directed along the axis XX of the spring over the turns 41 over a certain length. This branch is intended to support

  against the door at a stop for the fixed end.

  The movable end 43 is housed in one or the other port 154, 154 '.

  The establishment of the spring 4 on the sleeve 105, with pre-stressing of the spring, is done as shown in

Figures 8A-9B.

  According to FIG. 8A, the spring 4 is fitted onto the body 151 of the sleeve 105 and its movable end 43 is introduced into the orifice 154. At this time, the spring 4 is in the rest position and its fixed end 42 occupies the position represented in FIG. 8A, in the long radial pro5 of the end 43. Holding the sleeve 105 locked in rotation, for example as already indicated, by inserting into its square orifice 153, the drive square carried by a crutch and thus blocking the assembly by holding the stand, the fixed end 42 of the spring 4 is pivoted in the direction of arrow A to drive the branch 42-1 behind the stop 155 of the flange 152. By thus pivoting the end 42, the spring 4 is tensioned or prestressed due to the

winding direction of the turns 41.

  This spring and its sleeve as shown in FIG. 8A are intended to be mounted on a door, so that the normal operation of the crutch is made by pivoting in the opposite direction to the arrow A. After prestressing, the the fixed end 42 of the spring 4 occupies the position relative to the sleeve 105 which remains fixed in position,

  as shown in Figures 9A, 9B.

  If we want to increase the preload of spring 4, we

  can engage its movable end 43 in the orifice 154 'so that the stop 155 will not occupy the high position (in tracking the clock dial at the 12 o'clock position) but the 9 o'clock position (Figure 8A) and the fixed end 42 of the spring will be at rest in the diametrically opposite position, that is to say in the 6 o'clock position according to FIG. 8A, knowing that the sleeve 105 will always occupy the rotational position shown in FIG. 8A with its preload stop 155 occupying the 12 o'clock position.

  It will then be necessary to pivot the fixed end 42 of the spring not 30 by 900 as in the first case explained above but by 1800.

  Figures lOA-1 1C show another embodiment of the sleeve with pretension as a variant of the sleeve 105 of the previous figures. This sleeve consists of two parts 205A, 205B which engage one in the other in the direction of their axis (FIGS. 1OC and 11C), with angular positions which, in this example, can be

  rotated 90 (or n times 900).

  it Part 205A is somehow associated with the fixed end 42 of spring 4 (not shown in FIGS. 10 and 11) and part 205B

  is associated with the movable end 43 of the spring.

  Part 205A comprises an outer flange 252 anas housed at the flange 152 and provided with a prestress stop 155. A second flange 252 ′ is provided with a prestress stop 255 ′ in a diametrically opposite position. This part 205A consists of a disc 206 carrying tabs 207 distributed with an offset of 900

  around orifice 253A receiving the drive square.

  The other part 205B of the sleeve also consists

  a disc 208 carrying branches 209 also distributed at 90 around the orifice 253B for the passage of the drive square. The comparison of FIGS. 10A and 11A in the positions shown in the drawings shows that the branches 207, 209 are complementary and allow nesting in the angular orientation shown. This nesting is also possible when one of the parts 205A, 205B is turned 90 relative to one another.

  Note also the orifice 254 for receiving the movable end 43 of the spring. A second ori20 fice 254 'is also provided to allow the prestressing to be modified, this modification can also be done by the relative rotation of 90 or n times 900

  parts 205A, 205B, relative to each other.

  In this embodiment, the turns 41 of the spring 4 come on the outer part 251 carried here by the part 205B.

  According to the invention, the sleeves in one or two parts

  are preferably made of plastic, in particular polyamide.

  Figures 12A, 12B show a plate 170 with a knockout template 171 for enlarging the orifice OR of the door P 30 to allow pivoting of the sleeve with the spring in the position

  for locking a door fitted with a three-point lock.

  The template, as indicated, consists of a plate 170 with orifices 173, 174, 175, 176 distant from the usual spacing of the fixing screws of the cleanliness plates or of the plates equipped with a be35 keel.

  This plate 170 comprises a plate 171 forming a routing template with its contour 172. This routing contour partly corresponds to the open orifice which must be enlarged in a circular sector OR-1 (FIG. 13A) allowing the pivoting of the fixed end 42 of spring 4 to pass into the locking position of such a lock (the

  stand is then raised vertically).

  FIG. 13A shows the enlargement OR thus produced with a portable router enlarging the orifice OR of the door P. FIG. 13B shows, in vertical section passing through the orifice OR, the axis of the orifice, the OR enlargement carried out in the door. This arrangement is intended to install a spring device on the right side of the door. To install a spring on both sides, you should also make a clearance OR-1 on the left side according to Figure 13B.

  The knockout template 171 is interchangeable to take account of the different drilling or lock models.

Claims (6)

  1) Door handle return device equipped with a mortise lock comprising a return spring connecting (directly or indirectly) the handle to a fixed point on the door to return the handle to the rest position (horizontal position / position inclined) and support the spring of the lock, characterized in that it comprises - a sleeve (5) * provided with a through orifice (53), of square section, corresponding to that of the drive square (2) connecting the stand to the lock follower (SL), * intended to be housed in the thickness of the door next to the follower, * having a cylindrical surface provided with a stop (54), - a torsion spring (4 ) at least one turn having a fixed end (42) and a movable end (43), this spring (4) being mounted around the sleeve (5), its fixed end (42) being pressed against the door and   its movable end against the stop (54) of the sleeve (5).   2) door handle return device according to claim 1, characterized in that the stop (54) of the sleeve is an orifice and the movable end (43) of the spring (4) is bent to come into the orifice (54) of the sleeve (5) when   the spring is placed on the sleeve.   30) Door handle return device according to claim 2,   characterized in that the orifice (54) is radial.   4) door handle return device according to claim 1, characterized in that the fixed end (42, 42-1, 42-2) returns to the turns (41) of the spring (4), parallel to the axis of the spring.    ) Door handle return device according to claim 1, characterized in that the sleeve (105) comprises a prestress stop (155) to receive the fixed end (42, 42-1) of the spring (4), its movable end (43) bearing against the stop (154) of the sleeve (105) and, after assembly, the fixed end (42, 42-2) of the spring (4) comes to bear against a fixed point Door.   ) Door handle return device according to claim 5, characterized in that   the preload stop (155) is formed by an edge (152) of the sleeve (105) in a position relative to the stop (154) for the movable end (43) of the spring (4), offset in the direction of the prestressing to be given to the spring (4).   7) door handle return device according to claim 1, characterized in that   the sleeve (5, 105) has several stops (54, 54 ', 154, 154') for the movable end of the spring, to allow prestressing the res15 fate (4) to different preload values.   8) door handle return device according to claim 5, characterized in that the sleeve is formed by two parts (205A, 205B) engaged one inside the other, - a part (205B) provided with the stop (354) of the movable end (43) of the spring (4) and - a part (205A) provided with the stop (255) of the fixed end (42) of the spring (4), these two parts being able to be assembled in angular positions   to adjust the spring preload.