FR2783858A1 - Bascule bolt for edge of window or French window has mechanism enclosed in moulded housing, preferably of cast zinc alloy - Google Patents

Abstract

The bascule bolt assembly (1), designed to be fitted into the edge of a preferably timber upright (12) of a window or French window, has a mechanism (18) to convert the rotary movement of an actuator (31) into the lengthwise movement of a slider (54) and bolt (6, 7). The mechanism is enclosed in a moulded housing, preferably made from a cast zinc alloy, which is fitted into a recess (19) in the frame upright and has inner surfaces shaped to guide and position the mechanism's components and half-bearings for the converter pinion spindle.

Description

DESCRIPTION

  "Cremone bolt and method for equipping a window or French window" The present invention relates to a built-in cremone bolt for window, window, French window, etc., and in particular

  but not limited to a door with wooden joinery.

  The present invention also relates to a method for equipping such a leaf with a cremone bolt according to the first aspect. In the following we will call "amount" of the leaf the structural material of the leaf extending along an edge of the leaf. In general, the upright is vertical, but the

  other orientations, even horizontal, are not excluded.

  The cremone bolts comprise at least one sliding rod, in general two rods sliding in opposite directions, actuated by means of a rotary handle via a movement transformation mechanism. The mechanism housing is encased in a corresponding notch formed in the edge of the leaf of the

opposite side of the joint.

  More particularly, the rods move in a groove formed along the edge of the leaf. The open longitudinal face of the groove is obscured by an elongated metal plate called "headrest". A sheet metal housing containing the mechanism is fixed by crimping against the inner face of the headrest. In this way, the cremone bolt forms before assembly a whole in one piece ready to be fixed to the amount of the leaf by means of screws fixing the headrest along the groove. A triple hole formed through the leaf allows, after mounting the cremone bolt on the leaf, the fitting of the square shaft of the handle in one of the holes and in a female square, belonging to a rotary actuator (called " follower ") of the mechanism. The two other two holes are used to fix a fixed plate

forming a base for the handle.

  Current cremone bolts have a mechanism whose operation is not very precise, with necessarily large manufacturing tolerances. In addition, the mechanism housing is large. This forces a large notch to be made. This takes time, weakens the amount of the leaf and forces to provide for the leaf a

  amount of large section, therefore expensive.

  The object of the present invention is to provide a cremone bolt which overcomes at least some of the above drawbacks and which can be more precise in its operation and / or less bulky, and / or inducing less cost for

the fitted window.

  The present invention also provides a method for judicious mounting of a version of this cremone bolt on a leaf. According to the invention, the cremone bolt built into a leaf upright, and comprising: - a mechanism transforming a rotational movement of a rotary actuator into at least one translational movement in a longitudinal direction, applied to at least one slide of back and forth drive of a locking rod; - A housing containing at least partially the mechanism and intended to be mounted in a notch of the upright, is characterized in that the housing is made of molded material, preferably of zinc alloy, in particular

  the one known under the brand name "Zamak".

  Surprisingly, the use of molded material for the production of the housing, a priori more expensive, ultimately provides advantages even on the economic level. Thanks to the molding, it is possible to give the housing -3- minimum dimensions making it possible to reduce the dimensions of the notch to be produced, and therefore to strengthen the leaf and / or to reduce the section of the amount concerned. The molded material housing can contribute to the precision of the mechanism, thus reducing the forces and thus significantly reducing the size of the components, hence a new source for reducing the external size of the housing. The solution according to the invention therefore reconciles advantages of quality, reliability

and economy.

  Thanks to the molded embodiment, the housing can carry, molded on at least one of its inner faces, positioning and / or guiding conformations of certain parts of the mechanism. In practice, these conformations can be numerous on each inner face of the housing, and in particular on the two faces.

  side interior. The mechanism is thus simplified.

  Preferably, the housing is made of at least two molded partial housings, connected to each other by crimping. The molded embodiment is conducive to an embodiment in which the partial housings are connected to each other in a simple and precise manner, in particular with interlocking and crimping. In addition, this particularly precise assembly contributes once again to the

quality of operation.

  It is preferred, according to the invention, that the housing is removably attached to the headrest which substantially closes the front side of the housing and extends parallel to the longitudinal direction of translation of

  the locking rod (s).

  According to a particular object of the invention, the actuator of the mechanism carries removable fixing means for a bit. Thus, depending on the applications, such a rotary bit may or may not be provided. When the actuator is in the leaf locking position, such a bit protrudes through an appropriate light in the headrest to engage in a keeper formed in the fixed frame of the single leaf or in the edge of the opposite leaf. when the leaf belongs to a set of two leaves opening to the French. According to another advantageous object of the invention, the slide actuated back and forth by the mechanism is equipped with a removable coupling means with the rod. The rod therefore no longer needs to be a complex part to be manufactured, ending at one end with a nozzle having a function in the mechanism. According to this object of the invention, the slide and the rod itself are two separate parts. The rod can be a simple bar cut to length depending on the applications, and the slider is the same for all applications. We therefore simplify inventory management and reduce costs

correspondingly.

  According to yet another object of the invention, the headrest carries at least one end remote from the housing, for the rod, an end guide of molded material which protrudes longitudinally from the headrest and has beyond the

  headrest at least one softened edge.

  For reasons of economy, the headrest is generally constituted by a steel bar cut to length, and often having edges or burrs cutting at the ends. With this object of the invention, these cutting elements are set back and no longer risk injuring. It is advantageous that on a face intended to be at the bottom of the notch, the housing has a boss having a profile substantially in the form of an arc of a circle centered on the axis of rotation of the actuator. Thus, the best advantage is taken of the possibilities of reduction in size offered by the invention without questioning the dimensional uses -5- relating to the section of the female square of the actuator and to the distance between the axis of this square and the

outer face of the headrest.

  According to a second aspect of the invention, the method for equipping a window with a cremone bolt having the above-mentioned boss, comprising a step of forming a notch for the housing in an upright of the leaf, is characterized in that interference is made in the upright a main notch having a depth less than the depth of the housing measured at the top of the boss, and a drilling which is carried out through the upright and which locally hollow out the main notch in the zone intended for

receive the boss.

  This makes a main notch less deep than the maximum depth of the housing. This further facilitates the work of forming the notch and further reduces the resulting weakening for the upright. It is the formation of the hole for the handle shaft which forms in the necessary place, the local deepening of the notch which will receive the boss and thus allow the housing to

  fit completely into the notch.

  In addition, thanks to the process, the casing and therefore the entire cremone bolt are positioned precisely with respect to the handle axis, which facilitates the

installation of the lever.

  Other features and advantages of the invention

  will emerge further from the description below, relating to

non-limiting examples.

  In the accompanying drawings: - Figure 1 is a partial perspective view of a leaf equipped with a cremone bolt according to the invention; - Figure 2 is a partial view of the cremone bolt, the leaf and certain components of the cremone bolt being cut longitudinally; FIG. 3 is an exploded perspective view of the central part of the cremone bolt, with cutaway; - Figure 4 is a perspective view of one of the partial housings; - Figure 5 is a front view of the mechanism, with partial section and cutaway; - Figure 6 is an exploded perspective view of the actuator; - Figure 7 is a cross-sectional view of the cremone bolt along a plane passing through the handle axis; - Figure 8 is a view similar to Figure 7 but in an application without bit;

  - Figure 9 is a perspective view of a half

  actuator; - Figure 10 is a partial view in horizontal section through the leaf and the housing of the mechanism; - Figure 11 is a partial perspective view of the rod; - Figure 12 is a perspective view of part of the headrest and an associated end guide, in exploded form; - Figure 13 is a partial perspective view illustrating the method according to the invention; - Figure 14 is a partial view of the leaf in longitudinal section during the implementation of the method according to the invention; and - Figure 15 is a view similar to Figure 14 but

  relating to an alternative embodiment.

  In the example shown in FIGS. 1 and 2, the cremone bolt 1 equips a leaf 2 articulated along a vertical axis 3. The cremone bolt 1 is mounted along a wooden upright 12 of the leaf 2, opposite the axis 3. The cremone bolt 1 comprises two locking rods 6, 7 mounted to slide in their longitudinal direction in a groove 8 formed in the edge 7 defined by the upright 12 of the leaf 2. The rods 6, 7 slide back and forth between a retracted position

  and a protruding locking position.

  In the retracted position, shown in solid lines at the bottom of FIG. 1 as regards the rod 6, the free end of the rod is retracted in the groove 8. In the locking position, shown in dotted lines, the end of the rod protrudes beyond the end of edge 4 to engage a keeper (not shown) of the

  fixed frame (not shown) of the window or French window.

  The rods 6 and 7 are held captive in the groove 8 by an elongated plate or headrest 9 which closes the open longitudinal side of the groove 8. The headrest 9 is fixed to the leaf 2 by screws 11 which are screwed into the upright 12, through the bottom face of the groove 8. The screws 11, arranged along the center line of the headrest 9, pass through circular holes 13 in the headrest 9 and elongated holes 14 in the rods 6 and 7 (see Figures 11 and 12). When the rods 6 and 7 move between their locking and unlocking positions, the screws 11 circulate in the elongated holes 14, relative to the

rods 6 and 7.

  The back and forth movement of the rods 6 and 7 in opposite directions is controlled by a rotary handle 16, integral with a bit 17 which is located opposite a light 15 of the headrest 9. The bit 17 is movable , at the same time as the rods 6 and 7, between the retracted unlocking position shown in solid lines, in which it is erased in withdrawal from the outer face of the headrest 9, and the projecting position 17a represented in dashed lines, in which it can engage in a corresponding keeper formed in the fixed frame or in an opposite leaf upright, to achieve a third locking point. -8- As shown in FIG. 2, the cremone bolt 1 comprises, for controlling the movements of the rods 6 and 7 and of the bit 17 by the rotation of the handle, a mechanism 18 which is housed in a notch 19 formed in the upright 12 leaf 2. The notch 19 forms a recess in the groove 8 in the region of the bit 17 and the handle, of which only

  the geometric axis 21 is shown.

  The mechanism 18 (Figures 3 to 5) comprises a housing 22 formed of two partial housings 23 and 24 made of zinc alloy molded preferably the alloy known under the brand "Zamak". Each partial housing 23, 24 includes a respective longitudinal wall 26 and respectively 27 of the housing 22. The walls 26 and 27 are each traversed by a circular orifice 28 and respectively 29 along the axis 21 of the handle. The orifices 28 and 29 serve as bearings for a rotary actuator 31 carrying the bit 17. The rotary actuator 31 is crossed axially by a square hole 32 allowing the fitting of a coupling shaft 33, of square section, for the 'coupling of the actuator 31 with the handle 16 shown in Figure 1. The actuator 31 comprises two opposite cylindrical journals 34 intended to cooperate each with one of the orifices 28 and 29. On part of its periphery, the actuator has, axially between the pins 34, a boss 36 carrying a toothed sector 37, and this on each side of the bit 17 which extends along the median plane of the actuator 31. When the housing is assembled, the boss 36, trapped between the longitudinal walls 26 and 27, axially positions the actuator

31 in the housing 22.

  The actuator 31 (FIGS. 6 to 9) is subdivided into two half-actuators 38, 39 which are axially aligned and pressed axially against each other by means of a boss 41 carried by the half-actuator 38 The boss

  41 spacer shape defining between the two half

  -9- actuators 38, 39 an interval for the interposition of the bit 17. The boss 41 carries, at a distance from the handle axis 21, a lug 42 intended to engage in a corresponding hole 43 of the other half-actuator 39. The bit 17 has a central opening 44 which corresponds to the square hole necessary for the passage of the shaft 33 shown in FIG. 3, the opening 44 being enlarged by a notch corresponding to the contour of the boss 41. Thus, when the housing is assembled, the two half-actuators 38, 39 are kept in axial alignment by the engagement of the pins 34 in the orifices 28 and 29, and their relative angular position is fixed by the penetration of the lug 42 in the hole 43 In addition, the bit 17 is exactly positioned angularly and centered with respect to the two half-actuators thanks to the interpenetration of the eccentric boss 41 with the notch of the opening 44 of the bit 17. As shown in FIG. 8, in l es applications where the bit 17 is not necessary, it is sufficient not to interpose it between the two half-actuators 38 and 39, the positioning of which

  relative is independent of the bit. Each of the half

  actuators 38 and 39 form part of the boss 36 and part of the toothed sector 37, each tooth of which thus consists of two half-teeth situated on either side of

  the axial interval reserved for the bit 17. The half

  actuators 38 and 39 are made of cast zinc alloy

  and the bit 17 is made of steel.

  Each partial housing 23 or 24 (FIGS. 3 to 5) carries on its inner face multiple conformations, due to molding. Some of these conformations are pins 46 of the partial housing 24 intended to engage in corresponding holes 47 provided through the side wall of the other partial housing 23 to allow the assembly of the two partial housings by mutual approximation parallel to the handle axis 21 and fitting of the pins 46 into the holes 47. Then the free end of the pins 46 is deformed

  to crimp the two partial boxes together.

  The partial housing 24 is crossed by two threaded holes 48 with an axis parallel to the axis 21 and the partial housing 23 has corresponding smooth holes 49. In the assembled state, each threaded hole 48 cooperates with a screw 51 (Figures 1, 10 and 13) used to fix a plate 52 against the face of the upright 12 facing the interior of the building. The plate 52 serves as a fixed base for the handle 16. The fixing of the plate 52 by screwing into the housing 22 of the mechanism ensures good coaxiality between the handle 16 and the actuator 31 of the mechanism. The two screws 51 pass through holes 53 of the upright 12 and the corresponding smooth holes 49 of the housing

partial 23.

  The housing 22 contains a primary slide 54 (Figures 2, 3, 5, 7, 8) movable back and forth longitudinally for driving the rod 6. The slide 54 has a rack 56 which meshes with the toothed sector 37 of the actuator 31. The rack 56 consists of two parallel half-racks separated by a slot 57 elongated in the longitudinal direction for the passage of the

bit 17.

  Each toothed sector 37 is attached, on the side of the bit 17, to a flange sector 60 (FIGS. 7 to 9), which reinforces the teeth of the toothed sector 37 and forms between the bit 17 and the slide 54 a spacer contributing to the centering of the bit 17 and preventing friction between the

bit 17 and slide 54.

  Each of the partial housings 23 and 24 carries a conformation 58 against which slides an inner face 59 of the slider 54. The opposite face 61 of the slider 54 slides against the inner face 62 of the headrest 9. In addition, the slider 54 carries laterally from and on the other side of the rack 56 of the longitudinal tracks 63 on which roll smooth sectors 64 formed by the bosses 36 of the actuator 31 laterally on either side of the toothed sector 37 (see also Figures 7 and 8). Thus, the slide 54 is guided between on the one hand the headrest 9 and on the other hand the conformations 58 and the smooth sectors 64. For its lateral positioning, the slide 54 slides between the longitudinal walls 26 and 27

  partial boxes 23 and 24 respectively.

  Furthermore, the slide 54 has lateral bosses 66 which are each engaged in a correspondingly shaped recess 67 formed by molding through the longitudinal walls 26 and 27 respectively. At each of its longitudinal ends, each recess 67 has an end edge 68 forming an abutment edge for a corresponding terminal shoulder 70 of the boss 66, so as to limit the back and forth stroke of the slide 54

in each direction.

  The mechanism 18 also comprises two movement reversing pinions 69 (Figures 3 and 5), made of steel, each end of which is supported by a respective bearing formed by two half-bearings 71 along an axis 72 perpendicular to the handle axis 21 and to the axis of longitudinal reciprocating movement of the slide 54 and the rods. The two pinions 69, arranged one after the other along the said longitudinal direction, each mesh with two reversing racks, integral one 73 with the slide 54 and the other 83 with a secondary slide 74 movable longitudinally in the housing 22 to drive the other rod 7. There are a total of eight half-bearings 71. More particularly, the inner face of each longitudinal wall 26 or 27 carries two ribs molded 76. The top of each rib 76 carries two notches forming two half-bearings 71. Each longitudinal wall forms with the two ribs 76 which it carries a guide passage for one of the respective

  reversing racks 73 and 83 in their downward movement

  back and forth in longitudinal sliding. Each reversing rack 73 or 83 is bordered longitudinally on either side by two tracks 77 (Figures 3 and 5). The cylindrical ends 78 of the pinions 69, in a region located axially between the teeth of the pinions and a region engaged between the half-bearings 71, roll on the tracks 77 and thus form a spacer between the two racks 73, 83 while maintaining each of the reversing racks in sliding contact against the inner face of a respective one

  longitudinal walls 26 and 27 of the housing 22.

  The use of two reversing pinions 69 in the housing 22 of the movement transformation mechanism of the handle, according to one of the features of the invention, makes it possible to precisely position the reversing racks whatever the relative position of these racks, and even with pinions of small diameter, as shown. The small diameter of the pinions makes it possible to completely enclose them in the housing 22. Their diameter is in the direction of the width of the housing without this width taking an extraordinary value which would require an extraordinary cutting. As regards the slide 54, the reversing rack 73 is therefore arranged in a plane

  perpendicular to that of the rack 56.

  The headrest 9 is fixed to the housing 22 by two screws 79 (FIG. 3) which pass through corresponding holes 81 in the headrest. One of the screws 79 passes through the light 57 of the slide 54. The other screw 79 passes between the reversing racks 73 and 83. The two screws 79 cooperate with nuts 82 of square external shape which are held captive each in two anti-rotation half-housings 84 and 86 coming from molding on the internal face of the partial housings 23 and 24 respectively. The screws 79 are typically -13 - with a diameter of 3mm. The side walls 26 and 27 bear on their bearing edge against the faceplate 9 pins 80 (FIG. 3) which, after tightening of the screws 79, achieve a strong adhesion of the partial housings against the faceplate 9. This prevents the side walls 26 and 27 to move away from each other under the forces developed by the pinions

inverters 69.

  The two partial housings 23, 24 together form, at each end, an end opening through which a respective one of the slides 54, 74 extends to the outside of the housing and carries beyond it. ci, a nozzle 87

  coupling with one of the rods 6 and 7 respectively.

  Each endpiece comprises a stud 88 directed towards the headrest 9 and cooperating with an eyelet 89 of the rod. When fixed to the mechanism 18 by the screws 79, the headrest 9 prevents the rods 6 and 7 from being released from the studs 88 and consequently locks the coupling. The end pieces 87 form a cage 90 in which the end of the rod fits. The post 88 and the eyelet 89 are of corresponding oblong sections. This results in a rigid connection between each rod 6 or 7 and the associated slide. This prevents a tendency between each rod and the associated slide to form an angle under the effect of the thrust forces. This reduces friction and wear in the

  mechanism 18. It follows from the above description that

  the sliders 54 and 74 are guided in the housing 22, independently of the rods 6 and 7, but that the quasi-rigid connection between the rods and the sliders reduces the

  stresses undergone by these guide means.

  As illustrated in FIG. 11, the rods are simple steel bars having a repeating pattern of elongated holes 14 for the passage of the screws 11, and oblong holes 89a which can serve as a coupling eyelet with the end pieces 87. Depending on the applications, and in particular the height of the leaf to be fitted and the position of the mechanism and the handle along this height, each rod is cut to length so that one of the holes 89a is positioned for constitute the eyelet 89, the other cut being made as a function of the desired length. The headrest 9 (bottom of figure 1 and figure 12) is more

  shorter than the upright 12 and in particular that the groove 8.

  Thus each end 91 of the headrest is set back, for example 3mm relative to the corresponding end of the groove. In addition, the headrest carries at each end 91 an end guide 92 for the sliding of the rod 6 or 7 corresponding. The guide 92 has a U-shaped profile and carries on its free longitudinal edges lugs 93 for crimping in corresponding openings 94 in the headrest 9. The guide 92 also carries a bar 96 which completes the headrest 9 beyond its end 91. The end guide 92 is made of molded Zamak and at least one of its edges, in particular 97, exposed in contact with for example the hand of the housewife, is molded with a

  slightly rounded profile to avoid injury.

  As still shown in FIG. 2, the housing 22 has, facing the bottom of the notch 19, a boss 98 having an external profile in the form of an arc of a circle centered on the handle axis 21. The depth of the housing 22 relatively to the outer face of the headrest 9 has a maximum value PM which is reached only at the top of the boss 98. Uses impose the position in depth PH of the axis 21 relative to the outer face of the headrest 9. Typically , according to current usage, PH = 17mm, and the square hole 32 has a section of 7x7mm. The maximum depth PM is then typically, thanks to the invention, 23mm. It corresponds to PH to which are added the outside radius of the pins 34 and the thickness of a bottom wall 99 of one 24 of the partial housings. Along the boss 98, the bottom wall 99 has a

- 15 -

  cylindrical interior shape centered on the handle axis 21.

  The actuator 31 has, outside of the boss 36, a smooth part 101 which is cylindrical and of the same diameter as the pins 34. The angular extent of the smooth part 101 is equal to that of the interior surface of the cylindrical wall 99 increased the angular travel of the actuator 31, which is typically a quarter turn. The smooth cylindrical surface 101 is capable of sliding against the wall 99 during the rotation of the actuator and thus contributing to the correct positioning of the actuator 31

in the housing.

  For the mounting of the cremone bolt on the leaf, a main notch 19a (FIG. 13) is formed in the bottom of the groove 8 with a depth PI (FIG. 14) which is intermediate between the depths PH and PM and which is slightly greater than the depth of the housing outside the boss 98. Next, FIGS. 13 and 14, the upright 12 is drilled to form the holes 53 intended for the screws 51 and a hole 102 for the handle shaft. The bore 102, formed along the axis 21, has a diameter corresponding substantially to the outside diameter of the boss 98. Thus, as shown in FIG. 14, the hole 102 comes to interfere with the main notch 19a and to locally hollow out the latter, at 103, to form the notch 19. The local recess 103 is made at the precise location which should receive the boss 98. In the example shown, the main notch 19a is made with a milling cutter, turning along an axis parallel to the handle axis 21. In the example shown in FIG. 15, the main notch 19a was produced with a tool rotating along an axis which is horizontal with respect to FIG. 15, that is to say oriented depending on the depth of the cut. Then the main cut was hollowed out locally by the hole 102, to form the cut 19

  as in the example in figure 14.

- 16 -

  Of course, the invention is not limited to

examples described and shown.

  The actuator could be made in one piece with the bit, in which case a different actuator, without bit, would be used for applications without bit. We could use only one reverse gear, or even reverse movement by a lever system. Whatever the inversion mode, the primary slide could be activated by a finger fixed to

the actuator, not by gear.

  The two partial boxes could be assembled

by screwing.

  In the method, the holes 53, 102 could be made first, then only after the main cut 19a. - 17-

Claims (18)

  1- Cremone bolt (1) built into an upright (12) of the leaf (2), and comprising: - a mechanism (18) transforming a rotational movement of a rotary actuator (31) into at least one translational movement according to a longitudinal direction,   applied to at least one sliding drive (54)   and forth from a locking rod (6); - a housing (22) containing the mechanism (18) and intended to be mounted in a notch (19) of the upright (12), characterized in that the housing (22) is made of   molded material, preferably made of molded zinc alloy.   2- Cremone bolt according to claim 1, characterized in that the housing (22) carries, molded on at least one inner face, conformations (58, 71, 76, 99) for positioning and / or guiding parts (31 , 54, 69, 74) of the mechanism. 3- cremone bolt according to claim 2, characterized in that the conformations comprise on two opposite longitudinal walls (26, 27) of the housing, produced separately from one another, bearings (71) for at least one pinion (69 ) motion reverser between two slides   (54, 74) for two opposite rods (6, 7).   4- cremone bolt according to claim 3, characterized in that the conformations are complementary half-bearings (71), the reversing pinion (69) having an axis (72)   perpendicular to the handle axis (21).   - Cremone bolt according to claim 3 or 4, characterized in that the bearings (71) are carried on each longitudinal wall (26, 27) by ribs (76) forming between them a guide passage in translation for one respective slides (54, 74).   6- Cremone bolt according to one of claims 2 to 5,   characterized in that the conformations include anti-rotation housings (84, 86) for at least one nut (82) intended to receive a screw (79) for fixing the housing (22) to a headrest (9).   7- Cremone bolt according to one of claims 2 to 6,   characterized in that the conformations comprise in a bottom wall (99) a recess having a profile in an arc of a circle to contribute to the positioning and the support in rotation of the actuator (31).   8- Cremone bolt according to claim 7, characterized in that the actuator (31) has around its axis a smooth part (101) whose angular extent is approximately equal to that of the arc of a circle recess, increased by the angular travel of the actuator (31), and outside the smooth part (101) a part (36) fitted with drive members (37) of the slide (54).   9. Cremone bolt according to claim 7 or 8, characterized in that the actuator (31) is placed between on the one hand said recess and on the other hand at least one rolling track   (63) formed on the slide (54).   10- Cremone bolt according to one of claims 2 to 9,   characterized in that the conformations include at least one sliding guide (58, 72, 76) for the at least one slide (54, 74).   11- Cremone bolt according to one of claims 1 to 11,   characterized in that the partial housings (23, 24) are positioned relative to each other by interlocking (46, 47). 12. Cremone bolt according to claim 11, characterized in that the two molded partial housings (23, 24) are then fixed to each other.   13- Cremone bolt according to one of claims 1 to 12,   characterized in that the actuator (31) made of molded material carries removable fixing means (41) for a steel bit (17). - 19-   14- Cremone bolt according to one of claims 1 to 13,   characterized in that the actuator (31) comprises two half   actuators (38, 39) coupled in rotation with each other by means (41, 42) forming a spacer providing an axial gap for interposition, if necessary, of the bit (31).   - Cremone bolt according to claim 14, characterized in that at least one of the two half-actuators carries a toothing (37) meshing with the slide (54), the toothing (37) being attached, on the side of the bit, to a flange (60) for separation between the bit (17) and the slide (54).   16. Cremone bolt according to one of claims 1 to 12,   characterized in that the actuator (31) carries a bit (17) and at least on one side thereof a toothing (37) meshing with the slide (54), the toothing (37) being attached, on the bit side (31), to a flange (60) for strengthening the toothing (37) and for separating the   bit (17) and the slide (54).   17- Cremone bolt according to one of claims 1 to 16,   characterized in that the at least one slide (54, 74) is equipped with a removable coupling means (87) with a respective rod (6, 7).   18- Cremone bolt according to claim 17, characterized in that the coupling means (87) is locked by simple fixing of the housing (22) on a headrest (9) closing one side front of the housing.   19- Cremone bolt according to one of claims 17 or 18,   characterized in that the coupling means (87) is   fitted to achieve a substantially rigid coupling.   - Cremone bolt according to one of claims 1 to 19,   characterized in that the housing (22) is detachably attached to a headrest (9) substantially closing a front side of the housing and extending parallel to said direction. 21. Cremone bolt according to claim 20, characterized by friction means (80) between the housing (22) and the headrest (9).   22- Cremone bolt according to one of claims 1 to 19,   characterized in that the housing (22) is fixed to a headrest (9) substantially closing a front side of the housing and extending beyond the housing parallel to said longitudinal direction, and in that the headrest carries at least one end (91) an end guide (92) of molded material which protrudes longitudinally from the headrest (9) and has beyond the headrest at least one softened edge (97).   23- Cremone bolt according to one of claims 1 to 22,   characterized in that the longitudinal walls (26, 27) of the housing (22) comprise at least one recess (67) whose two ends (68) form a back-and-forth end stop for the slide (54) which is provided with shoulders (70) for   cooperate with each stopper, respectively.   24- Cremone bolt according to one of claims 1 to 23,   characterized in that the housing (22) has on an outer face intended to be located at the bottom of the notch (19) a boss (98) having a substantially arcuate profile   of circle centered on the axis (21) of the actuator (31).   - Method for equipping a leaf (2) with a cremone bolt (1) according to claim 24, comprising a step of forming a notch (19) for the housing (22) in an upright (12) of the leaf, characterized in that that a main notch (19a) having a depth (PI) less than the depth (PM) of the housing measured at the top of the boss (98) is interfered in the upright (12), with a hole (102) that the it is carried out through the upright (12) and which locally recesses the main notch -21 (19a) in the zone intended to receive the boss (98).