Integrated pull bar for joinery element

Abstract

The present invention relates to a pull bar for a joinery element, said joinery element comprising at least two opposing faces delimiting an internal space, said pull bar comprising: a plate through which an orifice passes, said plate being intended to be housed inside said internal space of said joinery element in application against a first of said faces through which at least one opening passes, in such a way that said orifice of said plate coincides at least in part with said opening of said face; a shell comprising a wall delimiting a bearing surface and a cavity, said shell being intended to be housed inside said internal space of said joinery element with its bearing surface in application against said plate and said cavity housed in said internal space of said joinery element;said plate partially closing said cavity in such a way that said orifice constitutes an orifice for the insertion of fingers into said cavity and that at least a portion of said plate closing said cavity constitutes a gripping area for said fingers, said plate and / or said shell being made of material(s) having a coefficient of thermal conductivity less than or equal to 300 W / (mK).

Description

Title of the invention: Integrated pull bar for joinery element 1. Scope of the invention

[0001] The field of the invention is that of joinery elements for buildings, such as doors, windows...

[0002] More specifically, the invention relates to the pull bars used to operate the openings of such joinery elements. 2. Prior art

[0003] Joinery elements, such as entrance doors, classically include a frame 10 fixed in a hole made in a wall of a building, and an opening 11 allowing the opening defined by the frame to be closed or released.

[0004] To maneuver the opening 11 so as to move it relative to the fixed 10 to close or release the opening, the opening is conventionally equipped with a handle.

[0005] Different types of handles exist, among which are protruding pull bars.

[0006] As shown in [Fig. 1], such a projecting pull bar 12 is in the form of a bar which is fixed to the opening 11 projecting from the surface of an external facing 111 of the opening 11 in a plane parallel and distant from it.

[0007] Pull bars of this type give doors a more modern look compared to classic rotating handles.

[0008] However, these drawbars present some disadvantages.

[0009] Because they protrude from the surface of the door leaf, these pull bars extend into the passage when the door leaf is open and form an angle of approximately 90° with respect to the frame. Consequently, they reduce the space for a person to pass through the door opening.

[0010] In addition, in this position there is a risk that a person may hit the drawbar when passing through the opening of the sleeper, which may cause injury.

[0011] The presence of such pull bars also poses logistical problems. Indeed, stacking multiple doors, each equipped with a pull bar, on pallets is impossible or severely limits the number of doors stacked on a single pallet, which tends to increase transport costs. To remedy this, the doors are packaged without their pull bars, and the pull bars are delivered separately, thus increasing the number of doors stacked on a pallet and optimizing transport. However, the pull bars must being installed on the construction site complicates the assembly of the doors and lengthens their installation time.

[0012] Finally, these pull bars can create risks of leaks. Indeed, their attachment to the door leaf requires drilling holes for fasteners such as screws. These holes constitute sources of water and / or air leaks, which are detrimental to the door's durability and thermal efficiency.

[0013] Another type of pull bar does not pose these problems; these are the integrated pull bars 13.

[0014] As shown in Figures 2 to 4, the integrated pull bars are housed inside the door leaf 11, between its inner face 112 and outer face 111, so that they do not protrude beyond it. These pull bars therefore do not encroach on the passageway when the door leaf is open and form an angle of approximately 90° with the frame, thus improving comfort and reducing the risk of injury. They also improve logistics because doors equipped with such pull bars can be easily stacked on a pallet. Furthermore, the doors are delivered already fitted with these integrated pull bars, which facilitates on-site installation.Furthermore, the integration of these pull bars does not require drilling through holes in the door opening for the passage of fixing elements, thus eliminating the risk of leaks to which doors equipped with protruding pull bars are subject.

[0015] However, these integrated pull bars present some disadvantages.

[0016] The constituent elements of these pull bars are made of metallic material, in particular aluminum alloy. Thus, the presence of such an integrated pull bar generates thermal bridges which negatively impact energy performance and can be a source of condensation on the inner face of the opening, the pull bar being located on its outer face.

[0017] Furthermore, the use of metallic materials, sometimes high-grade such as aluminum alloy, to manufacture the components of these pull bars, combined with the implementation of complex production techniques, particularly extrusion / machining / casting, results in high production costs. Therefore, this type of integrated pull bar is reserved for very high-end doors.

[0018] Finally, the metal production of the constituent elements of these drawbars, in particular via extrusion / machining / casting, negatively impacts the carbon footprint of the finished product.

[0019] There is therefore a need to improve all types of drawbars. 3. Objectives of the invention

[0020] The invention aims in particular to provide an effective solution to at least some of these different problems.

[0021] In particular, according to at least one embodiment, an objective of the invention is to improve the integrated drawbars.

[0022] In particular, the invention aims, according to at least one embodiment, to provide such a pull bar which reduces or even eliminates thermal bridges.

[0023] Another objective of the invention is, according to at least one embodiment, to provide such a pull bar which is cheap and can be implemented on a wide range of doors, in particular low and medium range doors.

[0024] Another objective of the invention is, according to at least one embodiment, to provide such a drawbar which is simple in design.

[0025] Another objective of the invention is, according to at least one embodiment, to provide such a pull bar which does not negatively impact the carbon footprint of a joinery element equipped with such a bar.

[0026] Another objective of the invention is, according to at least one embodiment, to provide such a pull bar which allows for a high degree of modularity, in particular in that the same pull bar can be integrated into different joinery elements to obtain different aesthetic results. 4. Presentation of the invention

[0027] These objectives, as well as others that may arise subsequently, are achieved according to the invention by means of a pull bar for a joinery element, said joinery element comprising at least two opposing faces delimiting an internal space, said pull bar comprising: - a plate through which an opening passes, said plate being intended to be housed inside said internal space of said joinery element applied against a first of said facings through which at least one opening passes, in such a way that said opening of said plate coincides at least in part with said opening of said facing; - a shell comprising a wall delimiting a support surface and a cavity, said shell being intended to be housed inside said internal space of said joinery element with its support surface applied against said plate and said cavity housed in said internal space of said joinery element;

[0028] said plate partially obstructing said cavity in such a way that said orifice constitutes an orifice for the insertion of fingers into said cavity and that at least a portion of said plate obstructing said cavity constitutes a gripping area for said fingers,

[0029] said plate and / or said shell being made of material(s) having a thermal conductivity coefficient less than or equal to 300 W / (mK).

[0030] Thus the invention relates to a pull bar intended to be integrated into a joinery element, and consisting of a shell defining a cavity for placing the fingers of a hand and a plate partially closing the cavity and delimiting a gripping area, the plate and / or the shell being made of material(s) having a thermal conductivity coefficient less than or equal to 300 W / (mK).

[0031] This approach makes it possible to provide a very simple design, robust and inexpensive integrated pull bar which is also thermally efficient.

[0032] According to one possible characteristic, said thermal conductivity coefficient is less than or equal to 1 W / (mK).

[0033] This improves the thermal efficiency of the handle by limiting heat loss.

[0034] According to one possible characteristic, the thermal conductivity coefficient of said shell is less than or equal to 1 W / (mK).

[0035] In this case, the plate can have a higher thermal coefficient and be made of a mechanically stronger material such as metal. Thus, the pull bar exhibits good thermal efficiency thanks to the shell made of a material with low thermal conductivity and good mechanical resistance via the plate.

[0036] According to one possible characteristic, said plate and / or said shell are made of a material belonging to the group comprising: plastics; wood; minerals; resins; composites.

[0037] According to one possible feature, said cavity is intended to be embedded in a cellular insulating material filling said internal space of said joinery element.

[0038] In this case, the shell preferably comprises anchoring elements intended to be embedded in said cellular insulation.

[0039] This improves the retention of the shell in the joinery element.

[0040] According to one possible feature, said anchoring elements include at least one band projecting on at least one of the edges of said wall forming said cavity.

[0041] This solution is simple and effective for anchoring the shell in the alveolar material.

[0042] According to one possible feature, said at least one strip is perforated.

[0043] This allows the cellular material to fit into the perforations and thus further improve the anchoring of the shell in the joinery element.

[0044] According to one possible feature, a pull bar according to the invention includes at least one reinforcement element of said gripping area of ​​said plate.

[0045] This improves the robustness of the pull bar.

[0046] According to one possible variant, said at least one reinforcing element is housed in said cavity and interconnected with said wall of said shell and said gripping area of ​​said plate.

[0047] According to another possible variant, said reinforcing element has an inclined gripping surface oriented towards the inside of said cavity.

[0048] According to another possible variant, said at least one reinforcing element comprises at least one connecting block between said shell and said plate

[0049] According to another possible variant, said reinforcing element is formed in the mass of said plate.

[0050] All these variants make it possible to ensure a simple and effective reinforcement of the pull bar.

[0051] According to one possible feature, said plate and said shell form a single unit, said plate and said shell forming a hinge allowing said plate to be applied against said bearing surface of said shell.

[0052] This simplifies the manufacture of the pull bar and facilitates its installation.

[0053] According to one possible feature, said shell and said plate are obtained by thermoforming or stamping.

[0054] This helps to reduce manufacturing costs.

[0055] According to one possible feature, said hull has a bottom wall opposite said support surface, said bottom wall being at least partly translucent and intended to come into contact with a second of said facings or near it, said second facing being crossed by an opening closed by said bottom wall of said hull.

[0056] This allows light to pass from one side to the other of a joinery element equipped with such a pull bar.

[0057] According to one possible feature, a drawbar according to the invention comprises at least one insulating glazing arranged between said bottom wall of said hull and said second facing, said at least one glazing closing said opening made in said second facing.

[0058] This allows light to pass through while benefiting from good thermal and, where applicable, sound insulation.

[0059] According to one possible characteristic, said wall of said shell is a simple skin.

[0060] According to another possible feature, said wall of said shell is a double skin.

[0061] This latter case can make it possible to improve the thermal insulation of the drawbar by placing insulation in the interior space delimited by the double skin.

[0062] The invention also covers a joinery element comprising at least two opposing faces delimiting an internal space, said joinery element comprising at least one pull bar according to any one of the above variants.

[0063] According to one possible feature, a first of said facings is crossed by an opening coinciding at least in part with said orifice of said plate, said joinery element comprising at least one reinforcement element of the facing located opposite said first facing in the extension of said pull bar.

[0064] This makes it possible to reinforce the facing located in the extension of the pull bar to prevent it from deforming when the pull bar is handled.

[0065] According to one possible feature, said at least one reinforcement element of said facing comprises at least one stamping formed in said facing opposite said first facing in the extension of said at least one opening of said first facing.

[0066] This makes it possible to reinforce the facing simply and effectively.

[0067] According to one possible feature, a facing according to the invention comprises at least one pull bar on at least one of said facings.

[0068] According to one possible feature, at least said first facing is traversed by at least two openings, said two openings leading into said cavity of said hull of said drawbar.

[0069] According to one possible characteristic, said at least two openings have different peripheral contours.

[0070] This allows for a high degree of modularity to generate variable joinery element aesthetics from the same pull bar. 5. Description of the figures

[0071] Other features and advantages of the invention will become apparent from the following description of particular embodiments, given by way of simple illustrative and non-limiting example, and the accompanying drawings, among which:

[0072] [Fig-1] [Fig.1] illustrates a perspective view of an opening equipped with a bar projecting print according to the prior art;

[0073] [Fig.2] [Fig.2] illustrates a front view of an opening equipped with an integrated pull bar according to the prior art;

[0074] [Fig.3] [Fig.3] illustrates a perspective view of an opening equipped with a bar projecting print according to the earlier art a detailed perspective view of the opening of the [Fig.2];

[0075] [Fig.4] [Fig.4] illustrates a partial cross-sectional view along axis AA of [Fig.2];

[0076] [Fig. 5] [Fig. 5] illustrates an exploded perspective view of an opening equipped with a example of a pull bar according to the invention;

[0077] [Fig.6] [Fig.6] illustrates an exploded perspective view of the drawbar of the opening of [Fig.5];

[0078] [Fig.7] [Fig.7] illustrates a cross-sectional view of the drawbar of the [Fig.6];

[0079] [Fig.8] [Fig.9] [Fig. 10] Figures 8, 9, 10 illustrate respectively a cross-sectional view and two perspective views of variants of the pull bar of [Fig.6] with perforated or non-perforated anchor bars;

[0080] [Fig.11] [Fig.12] [Fig.13] Figures 11, 12, 13 illustrate views of variants of the pull bar of [Fig.6] equipped with means for reinforcing the gripping area;

[0081] [Fig. 14] [Fig. 15] Figures 14, 15 illustrate views of variants of the pull bar of [Fig.6] partly translucent to allow light to pass through the opening they equip;

[0082] [Fig.16] [Fig.17] [Fig.18] Figures 16, 17, 18 illustrate views of variants of the drawbar of [Fig.6] whose shell and plate form a single unit;

[0083] [Fig. 19] [Fig.20] [Fig.21] [Fig.22] [Fig.23] Figures 19, 20, 21, 22, 23 illustrate views of a joinery element equipped with a pull bar according to the invention and facing reinforcement means;

[0084] [Fig.24] [Fig.25] Figures 24 and 25 illustrate views of a joinery element equipped with a drawbar according to the invention, one face of which is crossed by one or two openings leading into the same cavity of a shell of a drawbar according to the invention.

[0085] 6. Description of particular embodiments

[0086] An example of a drawbar according to the invention is presented in relation to figures 5 to 7.

[0087] As shown, such a pull bar 2 is intended to be integrated into an internal space 113 delimited by the external facing 111, the internal facing 112, opposite each other, and the frame 114 of the opening 11 of a joinery.

[0088] Such a drawbar 2 comprises a plate 20 and a shell 21.

[0089] The mounting plate 20 is in the form of a plate. It is traversed by an orifice 200. The mounting plate 20 is intended to be housed inside the internal space 113 of the joinery element, or more precisely of its opening 11, surface-mounted against one of its interior or exterior faces, in this case the exterior face 111 in the illustrated example, even though it could be the inner facing. More precisely, the face of the plate 20 facing the facing 111 is pressed against the inner face of the facing 111 facing the inner space 113. This facing 111, against which the plate 20 rests, is traversed by at least one opening 1111. The orifice 200 of the plate 20 coincides at least partially with the opening 1111 of the facing 111.

[0090] The peripheral contour of the orifice 200 of the plate 20 may have a rounded edge 2000 raised towards the facing against which the plate 20 is pressed so as to define a housing for the peripheral edge of the opening 1111 of the facing 111, as can be seen in particular on [Fig.7].

[0091] The plate 20 is attached to the facing 111 preferably by bonding, and a seal is made between the plate 20 and the facing 111 preferably by means of at least one gasket. The bonding and sealing functions can be achieved in combination, for example by using a waterproof adhesive.

[0092] The shell 21 comprises a wall 210 delimiting a bearing surface 2100 and a cavity 2101.

[0093] This shell 21 is intended to be housed inside the internal space 113 of the joinery element with: - its bearing surface 2100 applied against the plate 20, or more precisely against the surface oriented towards the internal space 113 thereof, and - cavity 2101 housed in internal space 113.

[0094] The shell here has a bottom 2102 and four sides 2103 that connect the bottom 2102 to the bearing surface 2100. The bottom is substantially parallel to the bearing surface, although this might not be the case. The bottom 2102 may be abutting one of the faces or may be offset from it.

[0095] The casing is monolithic. It may comprise a single wall, as shown in the figures, or a double-skinned wall delimiting an internal space between the two skins that can be filled with insulating material. This can improve the insulating properties of the window or door, particularly when the bottom 2102 is applied against one of the facings of the opening.

[0096] The plate 20 partially closes the cavity 2101 in such a manner as: - that the orifice 200 of the plate 20 constitutes an orifice for the insertion of fingers into the cavity 2101 of the shell 21, and - that at least a portion of the plate 20 closing the cavity 2101 constitutes a gripping area 201 for the fingers.

[0097] The plate 20 and / or the shell 21 are made of thermally weakly conductive material(s) having a thermal conductivity coefficient less than or equal to 300 W / (mK).

[0098] Preferably, the thermal conductivity coefficient of the shell and / or the plate is less than or equal to 1 W / (mK)).

[0099] In this case, the plate and / or the casing are made of a material belonging to the group comprising: plastics; wood; minerals; resins; composites.

[0100] Preferably, the casing and the mounting plate shall be made of a material having a thermal conductivity coefficient less than or equal to 1 W / (mK). However, the mounting plate 20 may be made of a material having a thermal conductivity coefficient greater than this value in order to give it greater robustness and to prevent it and the facing to which it is attached from deforming when a user pulls on the pull bar to move the opening. In this case, the mounting plate may, for example, be made of steel or aluminum alloy.

[0101] The interior space 113 of the opening 11 can be filled in whole or in part with at least one sound and / or thermal insulating cellular material.

[0102] In this case, the cavity 2101 is intended to be embedded in this or these alveolar insulating material filling the internal space 113.

[0103] This or these cellular materials can be in the form of one or more plates bonded to the facings 111, 112 in the internal space 113 or can be injected into the internal space 113.

[0104] The shell 21 may include anchoring elements intended to be embedded in the alveolar insulating material.

[0105] These anchoring elements improve the bonding of the shell and its retention in position within the opening. They are particularly effective when the cellular material is injected into the internal space 113.

[0106] In the embodiment of figures 8 and 9, these anchoring elements include at least one anchoring strip 3 projecting on at least one of the sides 2103 of the wall 210 forming the cavity 2101.

[0107] In the illustrated example, two anchoring strips 3 are implemented on two opposite sides 2103 of the wall 210 delimiting the cavity 2101. They extend along the longitudinal axis of the cavity 2101 preferably all along it and form a kind of right angle, one wing 30 of which is attached to the wall (in particular to the portions of the wall 210 constituting sides 2103 of the cavity 2101) and the other wing 31 extends substantially parallel to the bottom 2102 of the cavity 2101, i.e. substantially parallel to the facings 111, 112 and to the bearing surface 2100.

[0108] In the variant illustrated in figures 8 and 9, the anchor bands 3 are solid. In the embodiment of [Fig. 10], at least one of the anchoring strips 3 is at least partially perforated. In particular, the wing 31 projecting from the periphery of the shell 21 is traversed by a plurality of perforations 310. This implementation is particularly advantageous when the cellular material is injected into the internal space and further improves the retention of the shell within the opening.

[0109] In variants, the pull bar includes at least one reinforcement element 4 of the gripping area 201 of the plate 20.

[0110] In the embodiments of figures 11 and 13, at least one reinforcing element is housed in the cavity 2101 and interconnected with the wall 210 of the shell 21 and the gripping area 201 of the plate 20.

[0111] On [Fig. 11], it is interconnected with a side 2103 of the wall 210 of the shell 21 and the gripping area 201 of the plate 20.

[0112] On [Fig. 13], it is interconnected with the bottom 2102 of the wall 210 of the shell 21 and the gripping area 201 of the plate 20.

[0113] In the variant of [Fig. 11], the reinforcing element 4 has an inclined gripping surface 40 oriented towards the interior of the cavity 2101.

[0114] In the variant of [Fig. 13], at least one reinforcing element 4 comprises a connecting stud 41 between the shell 21 and the plate 20, more precisely between the base 2102 and the gripping area 201. In the illustrated example, two studs 41 are used. However, more than two studs 41 could be used.

[0115] In the variant of [Fig. 12], at least one reinforcing element 4 is formed on the face of the plate 20 facing inwards towards the cavity 2101 at the gripping area 201 of the plate 20.

[0116] In the variant of figures 17 and 18, at least one reinforcing element 4 can be formed directly in the mass of the plate 20 and interconnect or not the plate 20 with the shell 21. In the illustrated example, they are not interconnected with the shell.

[0117] In the variant of figures 16, 17 and 18, the plate 20 and the shell 21 form a single unit 5, the plate 20 and the shell 21 forming a hinge 50 allowing the plate 20 to be applied against the bearing surface 2100 of the shell 21.

[0118] The shell and / or the plate can be obtained by thermoforming or stamping.

[0119] In the variants of figures 14 and 15, the shell 21 has a bottom wall 2102 opposite the bearing surface 2100, the bottom wall 2102 being at least partly translucent and intended to be applied against a second of the facings 112 or near it, this second facing 112 being crossed by an opening 1120 closed by the bottom wall 2102 of the shell 21.

[0120] This variant can allow light to pass through the opening.

[0121] In the variant of [Fig. 14], the bottom 2102 of the shell 21 is applied against the face turned towards the internal space 113 of the second facing 112. A seal is made at the junction between the bottom 2102 and the second facing 113.

[0122] In the variant of [Fig. 15], a space is provided between the bottom wall 2102 and the second facing 112 through the opening 1120.

[0123] In this case, the joinery element includes at least one insulating glazing 5 disposed between the bottom wall 2102 of the shell 21 and the second facing 112, the at least one glazing 5 closing the opening 1120 provided in the second facing 112.

[0124] In the embodiment illustrated in [Fig. 15], the glazing is secured on one side to the facing 112 and on the other side to the wings 31 of the anchoring strips 3. Alternatively or in addition, the glazing could be secured to the back wall 2102. The anchoring strips 3 do not necessarily have to be used when glazing is used.

[0125] A seal is made on each face of the glazing with the facing 112 on one side and with the shell 21 and / or its anchoring strips 3 on the other.

[0126] In variants illustrated in figures 19 to 23, the joinery element includes at least one facing reinforcement element 112 located opposite the facing 111 crossed by the opening 1111 in the extension of the pull bar 2.

[0127] As shown, at least one reinforcement element includes at least one stamped 6 formed in the facing 112 opposite the facing 111 in the extension of at least one opening 1111 of the facing 111.

[0128] Several forms of reinforcement elements can be implemented.

[0129] In the example of Figures 19 and 20, the reinforcement is provided by means of two stampings made in the facing 112 along the longitudinal axis of the drawbar 2. These stampings are parallel and spaced apart and extend all along the drawbar 2 or beyond as shown in [Fig. 19] where they extend essentially all along the facing 112. More than two stampings could be implemented.

[0130] In the example of [Fig. 21], the reinforcement is provided by means of a plurality of indentations formed in the facing 112 extending from the pull bar 2. These indentations extend along axes orthogonal to the longitudinal axis of the pull bar 2. They are parallel and spaced apart. They preferentially extend over the entire width of the pull bar. They are also distributed essentially along the entire height of the pull bar. However, their vertical distribution could be greater or less than the height of the pull bar. Similarly, their length could be less than or greater than the width of the pull bar.

[0131] In the embodiment of figures 22 and 23, the reinforcement is achieved by means of a single stamping made on the facing 112 opposite the drawbar 2 on a surface substantially identical to that of the drawbar.

[0132] Thus, the stamping of the facing opposite the drawbar can be longitudinal or transverse, single or multiple, thin or wide...

[0133] This stamping, whatever its shape and number, makes it possible to avoid deformation of the facing located opposite the facing where the pull bar is installed, in particular when insulating material is injected between the shell and the facing located opposite the facing where the pull bar is installed.

[0134] In the embodiment just described, and its variants, the joinery element comprises a single pull bar arranged on one of the faces of its opening. In variants, the joinery element may comprise at least one pull bar on at least one of the faces. In other words, the joinery element may comprise one or more pull bars on one and / or the other of the faces.

[0135] In the embodiment, and its variants, which has just been described, the facing 111 is crossed by a single opening 1111 which opens into the cavity 2101 of the shell 21. This is for example represented in [Fig.23].

[0136] In the variant illustrated in [Fig.24], the facing 111 is crossed by two openings 1111 which open into the cavity 2101 of the hull 21.

[0137] Generally, the facing 111 may be traversed by at least two openings 1111 leading into the same cavity 2101 of at least one shell 21. The second 112 facing may also be traversed if at least one drawbar is implanted on the side of the second facing.

[0138] When several openings are made in the same facing to open into the same cavity of a shell, these openings may have different peripheral contours in shape and / or dimensions, as shown in [Fig.25].

[0139] The invention covers not only a pull bar but also a joinery element equipped with at least one pull bar. The joinery element belongs to the group comprising: - the doors; - windows with or without opening(s); - the gates; - the fences: - roller shutters; - blinds; - the pergolas; verandas.

Claims

Demands

1. Pull bar for a joinery element, said joinery element comprising at least two opposing faces delimiting an internal space, said pull bar comprising: - a plate through which an orifice passes, said plate being intended to be housed inside said internal space of said joinery element, applied against a first of said faces through which at least one opening passes, in such a way that said orifice of said plate coincides at least in part with said opening of said face; - a shell comprising a wall delimiting a bearing surface and a cavity, said shell being intended to be housed inside said internal space of said joinery element with its bearing surface applied against said plate and said cavity housed in said internal space of said joinery element;said plate partially closing said cavity in such a way that said orifice constitutes an orifice for the insertion of fingers into said cavity and that at least a portion of said plate closing said cavity constitutes a gripping area for said fingers, said plate and / or said shell being made of material(s) having a coefficient of thermal conductivity less than or equal to 300 W / (mK).

2. Pull bar according to claim 1 wherein said coefficient of thermal conductivity is less than or equal to 1 W / (mK)).

3. Pull bar according to claim 1 wherein the coefficient of thermal conductivity of said shell is less than or equal to 1 W / (mK).

4. Drawbar according to claim 2 or 3 wherein said plate and / or said shell are made of a material belonging to the group comprising: - plastics; - wood; - minerals; - resins; - composites.

5. Pull bar according to any one of claims 1 to 4 in which said cavity is intended to be embedded in a cellular insulating material filling said internal space of said joinery element.

6. Pull bar according to claim 5 in which said shell comprises anchoring elements intended to be embedded in said cellular insulation.

7. Pull bar according to claim 6 in which said anchoring elements comprise at least one band projecting on at least one of the edges of said wall forming said cavity.

8. Drawbar according to claim 7 wherein said at least one strip is perforated.

9. Pull bar according to any one of claims 1 to 8 comprising at least one reinforcing element of said gripping area of ​​said plate.

10. Pull bar according to claim 9 in which said at least one reinforcing element is housed in said cavity and interconnected with said wall of said shell and said gripping area of ​​said plate.

11. Pull bar according to claim 10 in which said reinforcing element has an inclined gripping surface oriented towards the inside of said cavity.

12. Pull bar according to claim 10 wherein said at least one reinforcing element comprises at least one connecting block between said shell and said plate.

13. Drawbar according to claim 9 in which said reinforcing element is formed in the mass of said plate.

14. Pull bar according to any one of claims 1 to 13 wherein said plate and said shell form a single unit, said plate and said shell forming a hinge enabling said plate to be applied against said bearing surface of said shell.

15. Drawbar according to any one of claims 1 to 14 wherein said shell and said plate are obtained by thermoforming or stamping.

16. A drawbar according to any one of claims 1 to 15, wherein said shell has a bottom wall opposite said bearing surface, said bottom wall being at least partly translucent and intended to be fitted against a second of the said facings or near it, the said second facing being crossed by an opening closed by the said bottom wall of the said hull.

17. Pull bar according to claim 16 comprising at least one insulating glazing disposed between said bottom wall of said hull and said second facing, said at least one glazing closing said opening made in said second facing.

18. Drawbar according to any one of claims 1 to 17 wherein said wall of said hull is a simple skin.

19. Drawbar according to any one of claims 1 to 17 wherein said wall of said hull is a double skin.

20. Joinery element comprising at least two opposing faces delimiting an internal space, said joinery element comprising at least one pull bar according to any one of claims 1 to 19.

21. Joinery element according to claim 20 in which a first of said facings is traversed by an opening coinciding at least in part with said orifice of said plate, said joinery element comprising at least one reinforcing element of the facing located opposite said first facing in the extension of said pull bar.

22. Joinery element according to claim 21 wherein said at least one reinforcing element of said facing comprises at least one embossed part formed in said facing opposite said first facing in the extension of said at least one opening of said first facing.

23. Joinery element according to any one of claims 20 to 22, comprising at least one pull bar on at least one of said faces.

24. Joinery element according to any one of claims 20 to 23 in which at least said first facing is traversed by at least two openings, said two openings leading into said cavity of said shell of said drawbar.

25. Joinery element according to claim 24 in which said at least two openings have different peripheral contours.

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