Metal lining frame for a door

Abstract

The metal lining frame for a door comprises: two jambs (1), each having two surfaces (1a), arranged opposite one another; a cross beam (2) that is connected to the two jambs (1) and has two surfaces (2a) arranged opposite one another; connection elements (3) for connecting the cross beam (2) to the two jambs (1); and anchoring elements (4; 4') for anchoring the two jambs (1) and the cross beam (2) to the wall in which the door is arranged. A series of slotted holes (5) is provided in each of the two surfaces (1a) of the two jambs (1), wherein the two slotted hole series (5) of each jamb (1) are arranged opposite one another in such a way that each slotted hole (5) of one of the two slotted hole series (5) lies opposite an associated slotted hole (5) of the other of the two slotted hole series (5), and vice versa. A series of slotted holes (5) is also provided in each of the two surfaces (2a) of the cross beam (2), wherein these two slotted hole series (5) are also arranged opposite one another in such a way that each slotted hole (5) of one of the two slotted hole series (5) lies opposite an associated slotted hole (5) of the other of the two slotted hole series (5), and vice versa. Each of the two connection sections (3a, 3b) has a series of connection holes (6) and, when the associated connection element (3) is in the mounted position, each connection hole series (6) lies over an associated slotted hole series (5). A plurality of self tapping screws (7) are also provided, with each of which having a self tapping shank, which has a diameter measurement that is greater than the width of each of the slotted holes (5), wherein each self tapping screw (7) is screwed into an associated connection hole (6) and thereby penetrates into an associated slotted hole (5) behind the connection hole (6) and deforms same.

Description

[0001] METALLIC BLINDING STICK FOR A DOOR

[0002] Technical field

[0003] The invention relates to a metallic blind frame for a door according to the preamble of patent claim 1.

[0004] As is well known, metal door frames are used to anchor door frames to them instead of to the wall. This typically occurs when one of two situations exists: the wall in which the door is intended to be installed is not sufficiently solid, and there is therefore a risk that the frame will not be securely anchored to the wall, or the wall opening in which the door must be installed has already been finely finished. In this case, anchoring the door to the door frame can be done quickly, safely, and cleanly.

[0005] State of the art

[0006] In accordance with the state of the art, metal jambs are manufactured using closed-section profiles and are delivered pre-assembled. The connecting and anchoring elements are rigidly attached to the jambs and crossbeam, often by welding, so that the jamb is brought to the wall opening as a single piece, then inserted into it and anchored to the wall. This known technique therefore involves the production of jambs that are specifically designed for each installation, depending on their location and the dimensions of the wall opening in which the door must be installed.

[0007] Instead, the mass production of a single blind post model, which can be adapted on-site to the installation site and the dimensions of the wall opening, would be practical and desirable. Furthermore, the fact that the blind post is delivered as a single piece, with its main components (i.e., two posts, the crossbeam, the connecting elements, and the anchoring elements) already rigidly assembled, may pose difficulties during its transport from its place of manufacture to its installation site due to its dimensions.

[0008] The document US 1,723,991 A discloses a dummy frame for a door, which is suitable for being assembled at the installation site of the door and has the features of the preamble of patent claim 1.

[0009] Description of the invention

[0010] The object underlying the invention is therefore to further develop a metallic dummy post for a door of the type mentioned in the preamble of patent claim 1 in order to provide a dummy post which can be easily adapted to the dimensions and shape of the wall opening in which it has to be arranged at its installation site and which can also be easily transported to this wall opening without particular difficulties.

[0011] According to the invention, this object is achieved if a metallic dummy frame for a door, which has the features of the preamble of patent claim 1, additionally also has the features specified in the characterising part of patent claim 1.

[0012] Thanks to the particular arrangement of the oblong holes provided according to the invention in the posts and crossbeam, and of the connecting holes provided according to the invention in the connecting elements, and also thanks to the self-tapping screws, it is always possible to adapt the blind post according to the invention to the characteristics of the wall opening in which it must be inserted. To this end, it will be sufficient to cut the posts and crossbeam to the desired length on site using a metal saw and then join their ends together using the connecting elements, screwing each self-tapping screw into a connecting hole in the connecting elements and into the underlying oblong hole in the posts or crossbeam. Since sequences of oblong holes and sequences of connecting holes are provided, it is always possible to find points where the screwing described above is possible.The self-tapping screws also eliminate the need for a nut inside the posts and cross member.

[0013] Thanks to the invention, it is also possible to transport all components of the blind stick loose instead of transporting the already assembled blind stick and this requires much less space for transport.

[0014] Both the typical angle profiles of the known technology, which have a U-shaped cross-section, and flat angle elements, one for each side of the door, can be used as connecting elements. In both cases, however, such connecting elements must be provided with the sequence of connecting holes provided for by the invention.

[0015] It is also conceivable for the two connecting portions of each connecting element to be formed from two plates, in which case further self-tapping screws are provided according to the invention, and for at least one locking hole to be provided both in the first connecting portion, i.e. in one of the plates, and in the second connecting portion, i.e. in the other of the plates. In this way, in the assembled position of the connecting element, i.e. of the two plates that form it, the two locking holes can be arranged opposite one another and another self-tapping screw can be screwed into them, so that the plate connected to the cross member is firmly and rigidly connected to the plate connected to the post.

[0016] According to the invention, however, it is preferred that each connecting element has an intermediate section which is arranged between the two connecting sections of the connecting element and connects them to one another and has a cross-section whose bending strength is lower than that of each of the two connecting sections. In such a case, if, as provided for in the invention, the two connecting sections have an L-shaped cross-section and the width of the first connecting section and the width of the second connecting section are not the same, it is possible to provide connecting elements which are initially rectilinear, e.g. during their transport, and then, when the cross member is connected to the posts, are bent thanks to the reduced bending strength of the intermediate section.The two connecting sections of the connecting element are pivoted due to the bending of the intermediate section, and their areas where the locking holes are present can, thanks to the different widths of the connecting sections, be located one above the other, so that an associated additional self-tapping screw can then be screwed into the two locking holes. Furthermore, if a reduction in the cross-section, e.g., a weakening hole or a notch, is provided in the intermediate section of each connecting element, the bending of the connecting section is facilitated.

[0017] Anchoring elements are known. Each of them can be bent at a right angle so that each of its two anchoring sections is positioned in a specially designed niche in the wall. According to the invention, the connection between a post or crossbeam and such an anchoring element is achieved by inserting one of the two anchoring sections into two oppositely spaced slots in a corresponding post or crossbeam. In this way, thanks to the widespread presence of slots, the most suitable location for anchoring the post or crossbeam to the wall can be selected.

[0018] In most cases, anchoring is achieved by filling the two niches in the wall in which the two connecting sections are arranged with a fluid filling material, e.g. mortar or insulating foam, but in the case of particularly heavy doors, the invention additionally provides that each of the two anchoring sections has fixing holes through which fixing screws extend, so that the two anchoring sections can be fixed even more firmly to the wall.

[0019] To hold the anchoring element in position until the recesses in the wall are filled, each anchoring element is provided with two tabs, each with its end protruding from the plane formed by the surface of the anchoring element. These two tabs prevent the anchoring element from slipping out of the slots, as will be explained below.

[0020] The anchoring elements described are particularly suitable for anchoring the subframe to brick walls and to walls that are not particularly strong or compact. In the case of concrete walls, it is preferable to use anchoring screws as anchoring elements, each of which extends into a corresponding anchoring hole of a sequence of anchoring holes provided both in the side of the mullion that connects the two mullion walls, which have the slotted holes, and in the side of the crossbeam that connects the two crossbeam walls, which have the slotted holes. Often, the anchoring screws are used to anchor the crossbeam because there may be a concrete beam in the ceiling above the door, and the anchoring elements with two anchoring sections are used to anchor the mullions because the walls are made of brick.

[0021] With regard to the posts and the crossbeam, according to the invention, these are formed from open-section profiles, which, compared to those with a closed cross-section, are lighter and cost less and can be cut more easily. The interior of the open-section profiles is filled with a fluid filling material, typically mortar or insulating foam, which then hardens over time. Such a filling reduces heat transfer in the event of a fire because there is less metal and because the conductivity of the mortar or insulating foam is lower than that of the metal. The filling also reduces sound transmission and achieves a rigidity comparable to that of the closed-section profiles.

[0022] The invention provides that the cross-section of the posts and the cross member can be U-shaped, but it is preferred according to the invention that the profiles with an open cross-section which form the posts and the cross member have a cross-section whose shape is that obtained by adding a line laterally to a "U" as a continuation of the lower part of the "U". In such a cross-section, the two parallel walls of the "U" represent the cross-section of the two walls of the posts provided with oblong holes and the cross-section of the two walls of the cross member provided with oblong holes, respectively, and the line represents the cross-section of a wing which protrudes laterally from one of the two aforementioned walls of the two posts and from one of the two aforementioned walls of the cross member.Because the blind post, after its positioning and anchoring, is partially incorporated into the mortar with which the wall is constructed, the wing serves to hold the mortar in position and acts as an edge protector and protects the wall.

[0023] To facilitate the filling of the posts and crossbeam with the filling material, which, as has been stated, is typically mortar, the connecting elements have through holes through which the filling material can flow. Finally, to ensure the correct spacing between the two posts during the erection work of the subframe, the subframe also includes at least one spacer connecting the posts and having a U-shaped cross-section. It is inserted at each of its ends in a fixable manner into a slot, also U-shaped, of a plurality of slots provided in the posts. At the end of the erection work, the spacer is largely removed.

[0024] Short description of the drawings

[0025] Additional advantages and features of the invention will become apparent from the following description of embodiments of the metal dummy frame for a door according to the invention, which are explained purely by way of example and not in a limiting manner with reference to the attached drawings. In the drawings, the various figures are shown at different scales for reasons of illustration and schematically show: Fig. 1 the front view, interrupted at various points, of a dummy frame according to the invention; Fig. 2 the sectional view along the section line S1 -S1 of Fig. 1; Fig. 3 the enlarged perspective view of what is located inside the dashed circle shown at the top left in Fig. 1; Figs. 4 and 5 the enlarged perspective view of what is located inside the dashed circle shown at the bottom left in Fig. 1, respectively.the dashed circle shown in Fig. 1 bottom right; Fig. 6 is a perspective view of the dummy frame of Fig. 1 when it is arranged in the wall opening for the door; Fig. 7 is an enlarged perspective view of what is located inside the dashed circle shown in Fig. 6 top right; Fig. 8 ■ 12 is a perspective view of some components of the dummy frame of Fig. 1 shown alone; Fig. 13 is a perspective view of some components of the dummy frame of Fig. 1 assembled in their advantageous transport position from their place of manufacture to the place where the dummy frame is to be installed; Fig. 14 is a front view of the components of Fig. 13.

[0026] Best way to carry out the invention

[0027] The figures show a metal door frame. It comprises two posts 1, each of which has two walls 1a arranged opposite one another, and a cross member 2, which is connected at one of its ends to one of the two posts 1 and at its other end to the other of the two posts 1, and has two walls 2a arranged opposite one another.

[0028] The blind frame also comprises, as shown in particular in Fig. 3, connecting elements 3 for connecting the cross member 2 to the two posts 1, and anchoring elements 4; 4' for anchoring the two posts 1 and the cross member 2 to the wall in which the door is arranged. In each of the two walls 1a of the two posts 1, see Fig. 3 or Fig. 8, a sequence of oblong holes 5 is provided and the two resulting sequences of oblong holes 5 of each post 1 are arranged opposite one another in such a way that each oblong hole 5 of one of the two sequences of oblong holes 5 is opposite an associated oblong hole 5 of the other of the two sequences of oblong holes 5 and vice versa.

[0029] Also in each of the two walls 2a of the cross member 2, a sequence of elongated holes 5 is provided, see Fig. 3 or Fig. 9, and also the two resulting sequences of elongated holes 5 are arranged opposite each other in such a way that each elongated hole 5 of one of the two sequences of elongated holes 5 is opposite an associated elongated hole 5 of the other of the two sequences of elongated holes 5 and vice versa.

[0030] In this way, a plurality of pairs of elongated holes 5 are formed, which are distributed along the walls 1a and 2a.

[0031] As can be seen in Fig. 3, two connecting elements 3 are provided to connect one end of the cross member 2 to a jamb 1. Each connecting element 3 has a first connecting portion 3a connected to a jamb 1, and a second connecting portion 3b connected to the cross member 2. Each of the two connecting portions 3a, 3b has a series of connecting holes 6, see Fig. 10, and, when the associated connecting element 3 is in the assembled position shown in Fig. 3, each series of connecting holes 6 overlies an associated series of oblong holes 5. The provision of two connecting elements 3, one for each side of the door, makes it possible to reduce heat transfer in the event of a fire thanks to the interruption created between the two connecting elements 3.

[0032] A plurality of self-tapping screws 7 are also provided, each of which has a self-tapping shaft whose diameter is larger than the width of each of the elongated holes 5. Each self-tapping screw 7 is screwed into an associated connecting hole 6 and thereby penetrates into an associated elongated hole 5 located behind the connecting hole 6, thereby deforming it. Each connecting element 3 has at least two blocking holes 8, and further self-tapping screws 7' are also provided. As can be seen in Fig. 10, one of the blocking holes 8 is arranged in the first connecting section 3a of the connecting element 3 and the other in the second connecting section 3b of the connecting element 3. When the connecting element 3 is in the assembled position, see Fig.3, its two blocking holes 8 are arranged opposite each other and into them 8 another self-tapping screw 7' is screwed.

[0033] As can be seen from the comparison between Fig. 10 and Fig. 3, each connecting element 3 is bent, and this is made possible by the fact that it has an intermediate section 3c, which can be seen in Fig. 10 and is arranged between the two connecting sections 3a, 3b of the connecting element 3 and connects them together. The intermediate section 3c has a cross-section, e.g., a square cross-section, whose bending strength is smaller than that of each of the two connecting sections 3a, 3b. In this way, each connecting element 3, which is initially rectilinear (see Fig. 10), can be bent (see Fig. 3). The two connecting sections 3a, 3b, on the other hand, have an L-shaped cross-section (see Fig. 10).The width of the first connecting section 3a and the width of the second connecting section 3b are not equal, and for this reason, during bending and in the area where the two blocking holes 8 are present, one connecting section rests on the other. In the intermediate section 3c of each connecting element 3, a reduced cross-section is also provided, e.g., a weakening hole 9 as shown in the figures, to further reduce the bending strength of the intermediate section 3c and simplify bending. After the connecting element 3 has been bent, it no longer freely assumes its initial rectilinear position because the material of the intermediate section 3c has been deformed.

[0034] Each anchoring element 4 is also, as is known, flexible; see Fig. 3 and Fig. 11. It 4 comprises two anchoring sections 4a, 4b, each of which is arranged in a corresponding, specially designated niche in the wall (see Fig. 7) and is then covered with a fluid filling material 11, e.g., mortar or insulating foam with which such niches are filled. As can be seen in Fig. 3, one of the anchoring sections, e.g., the anchoring section 4a, is inserted into two oppositely disposed oblong holes 5 of an associated post 1 or the cross member 2. Each anchoring element 4 is also provided with two tabs 4d, which can be seen in Fig. 1 1, each of which projects with its end from the plane formed by the surface of the anchoring element 4.The two tabs 4d prevent the anchoring element 4a from slipping out of the holes 5 because one of them rests on the wall in which the slot 5 is located, see Fig. 3, and the other, after being pushed inwards while passing through the slots 5, has returned to its initial position in which it protrudes from the plane of the surface of the anchoring element 4.

[0035] The figures also show the fastening holes 4c provided by each of the two anchoring sections 4a, 4b. If necessary, fastening screws, such as those shown in Fig. 7, can extend through these fastening holes 4c to further anchor the two anchoring sections 4a, 4b to the wall in which the door is located, in addition to the mortar 11.

[0036] As an alternative to the anchoring element 4 comprising the two anchoring sections 4a, 4b, it is possible for an anchoring element to be formed by an anchoring screw 4', see Figs. 1, 3 and 7. Such an anchoring screw 4' is shown, for example, in the figures with reference to a possible concrete beam arranged above the door and it extends through an associated anchoring hole 10 of a sequence of anchoring holes 10 provided both in the side 1b of the posts 1, which connects the two walls 1a, and in the side 2b of the cross member 2, which connects the two walls 2a.

[0037] The posts 1 and the cross member 2 are made of open-section profiles and have a cross-section whose shape is that obtained by adding a line laterally to a "U" as a continuation of the lower section of the "U". In a cross-section having such a shape, the two parallel walls of the "U" represent the cross-section of the two walls 1a of the posts 1 and the cross-section of the two walls 2a of the cross member 2, respectively, and the line represents the cross-section of a wing 1c or 2c projecting laterally from one of the two walls 1a of the two posts 1 and one of the two walls 2a of the cross member 2.

[0038] The interior of the posts 1 and the beam 2 is filled with a fluid filling material 11, e.g., mortar or insulating foam, which then hardens over time. To allow filling in the corners as well, the connecting elements 3 have through holes 12 through which the filling material 11 can flow.

[0039] The metal blind post also comprises at least one spacer 13 for connecting the posts 1 together during assembly. The spacer 13 has a U-shaped cross-section and is inserted with each of its ends, in a fixable manner, into a U-shaped slot 1d of a plurality of slots 1d provided in the side 1b of the posts 1, see Figs. 1, 4 and 5. The spacer 13 also has, near each of its ends, a pair of notches 13a into which the bottom of the slot 1d of the posts 1 is inserted. To allow such insertion, each end of the spacer 13 is inserted with play along the vertical axis into the associated slot 1d, as can be seen in Fig. 5.

[0040] The spacer 13 also has, near each of its ends, a fastening hole 13b, and at least one further fastening hole 1e is provided in the two walls 1a of each post 1. When the bottom of the slot 1d of the post 1 is inserted into the pair of notches 13a of the spacer 13, the fastening hole 13b and the further fastening hole 1e are located opposite each other and a locking screw 14 can be screwed into them. After the dummy post has been incorporated into the filling material 11, the part of the spacer 13 not inserted into the slots 14 is cut off and removed.

[0041] Finally, Figs. 13 and 14 show how the dummy frame can be packed with minimal space requirements. Note the very small width, which is possible thanks to the inclusion of flexible connecting elements 3.

Claims

PATENT CLAIMS 1 . Metal blind frame for a door comprising : . two posts (1 ), each of which has two walls (1 a) arranged opposite each other; . a cross member (2) connected at one of its ends to one of the two posts (1) and at its other end to the other of the two posts (1) and having two walls (2a) arranged opposite one another; . Connecting elements (3) for connecting the cross member (2) to the two posts (1), each connecting element (3) having a first connecting portion (3a) connected to a post (1) and a second connecting portion (3b) connected to the cross member (2); and . Anchoring elements (4; 4') for anchoring the two posts (1) and the cross member (2) to the wall in which the door is arranged, characterized in that a series of oblong holes (5) is provided in each of the two walls (1a) of the two posts (1), the two series of oblong holes (5) of each post (1) being arranged opposite one another in such a way that each oblong hole (5) of one of the two series of oblong holes (5) is opposite an associated oblong hole (5) of the other of the two series of oblong holes (5) and vice versa; that a sequence of elongated holes (5) is also provided in each of the two walls (2a) of the cross member (2), these two sequences of elongated holes (5) also being arranged opposite one another in such a way that each elongated hole (5) of one of the two sequences of elongated holes (5) is opposite an associated elongated hole (5) of the other of the two sequences of elongated holes (5) and vice versa;that each of the two connecting sections (3a, 3b) has a sequence of connecting holes (6) and each connecting hole sequence; (6) lies over an associated sequence of elongated holes (5) when the associated connecting element (3) is in the assembled position, and that a plurality of self-tapping screws (7) are provided, each of which has a self-tapping shaft whose diameter dimension is greater than the width of each of the elongated holes (5), wherein each self-tapping screw (7) is screwed into an associated connecting hole (6) and thereby penetrates into an associated elongated hole (5) located behind the connecting hole (6) and deforms it in the process.

2. Blind post according to claim 1, characterized in that further self-tapping screws (7') are provided and in that each connecting element (3) has at least two blocking holes (8), one of which is arranged in the first connecting section (3a) and the other in the second connecting section (3b); wherein, when the connecting element (3) is in the assembled position, its two blocking holes (8) are arranged opposite one another and a further self-tapping screw (7') is screwed into them (8).

3. Blind stick according to claim 2, characterized in that each connecting element (3) has an intermediate section (3c) which is arranged between the two connecting sections (3a, 3b) of the connecting element (3) and connects them to one another and has a cross-section whose bending strength is smaller than that of each of the two connecting sections (3a, 3b), that the two connecting sections (3a, 3b) have an L-shaped cross-section and that the width of the first connecting section (3a) and the width of the second connecting section (3b) are not the same.

4. Blind stock according to claim 3, characterized in that in the intermediate section (3c) of each connecting element (3) a reduction (9) of the cross-section is provided, which (9) reduces the bending strength of the intermediate section (3c).

5. Blind frame according to one of the preceding claims, characterized in that each anchoring element (4) is flexible and has two anchoring sections (4a, 4b), one of which (4a) is inserted into two oppositely located slots (5) of an associated post (1) or of the cross member (2), each of the two connecting sections (4a, 4b) being arranged in an associated, specifically designated niche of the wall in which the door is arranged 6. Blind frame according to claim 5, characterized in that each of the two anchoring sections (4a, 4b) has fastening holes (4c) through which fastening screws extend for fastening the two anchoring sections (4a, 4b) to the wall in which the door is arranged.

7. Blind post according to claim 5 or 6, characterized in that each anchoring element (4) is provided with two tabs (4d), each of which projects with its end from the plane formed by the surface of the anchoring element (4).

8. Blind post according to one of the preceding claims, characterized in that each anchoring element (4') is formed by an anchoring screw which (4') extends into an associated anchoring hole (10) of a sequence of anchoring holes (10) which is provided both in the side (1b) of the posts (1) connecting the two walls (1a) and in the side (2b) of the cross member (2) connecting the two walls (2a).

9. Blind post according to one of the preceding claims, characterized in that the posts (1) and the cross member (2) are formed from profiles with an open cross section and that the interior of the posts (1) and the cross member (2) is filled with a fluid filling material (11) which then hardens over time.

10. Blind frame according to claim 9, characterized in that the profiles with an open cross-section, which form the posts (1) and the cross member (2) form, have a U-shaped cross-section, wherein the two parallel walls of the "U" represent the cross-section of the two walls (1 a) of the posts (1 ) and the cross-section of the two walls (2a) of the cross member (2) respectively and the lower section of the "U" represents the side (1 b) of the posts (1 ) which connects the two walls (1 a) of the posts (1 ) and the side (2b) of the cross member (2) which connects the two walls (2a) of the cross member (2).

11. Blind frame according to claim 10, characterized in that the profiles with an open cross section which form the uprights (1) and the cross member (2) have a cross section whose shape is that obtained by adding a line laterally to a "U" as a continuation of the lower part of the "U", the two parallel walls of the "U" representing the cross section of the two walls (1a) of the uprights (1) and the cross section of the two walls (2a) of the cross member (2) respectively and the line representing the cross section of a wing (1c) or (2c) which projects laterally from one of the two walls (1a) of the two uprights (1) and from one of the two walls (2a) of the cross member (2).

12. Blind stick according to one of claims 9 to 11, characterized in that the connecting elements (3) have through holes (12) through which the filling material (11) can flow.

13. Blind post according to one of the preceding claims, characterized in that it comprises at least one spacer (13) for connecting the uprights (1 ) together, which spacer (13) has a U-shaped cross-section and is inserted with each of its ends in a fixable manner in position into one of a plurality of slots (1 d) provided in the side (1 b) of the uprights (1 ), each end of the spacer (1 3) being inserted with play along the vertical in the associated slot (1 d) and the spacer (13) in turn having, near each of its ends, a pair of notches (13a) into which the bottom of the slot (1 d) is inserted.

14. Blind stock according to claim 13, characterized in that the Spacer (13) has a fixing hole (13b) near each of its ends and at least one further fixing hole (1e) is provided in the two walls (1a) of each post (1); when the bottom of the slot (1d) of the post (1) is inserted into the pair of notches (13a) of the spacer (13), the fixing hole (13b) and the further fixing hole (1e) are opposite each other and are crossed by a locking screw (14).

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