Mounting aid for assembling door frames

Description

[0001] The present invention relates to an assembly aid for assembling door frames.

[0002] Door frames, or simply frames, conceal the walls surrounding or bordering door and other wall openings in buildings. These walls are also known as jambs or reveals and are used to attach door leaves. Due to their size, door frames are typically delivered in individual parts and assembled close to their final installation location. In the simplest case, a frame consists of three parts: two side jamb boards or reveal sections and a lintel section. The jamb boards of an installed frame extend essentially vertically and are connected by the lintel section, which extends essentially horizontally. Some frames also feature a trim piece attached to the sides of the jamb boards and lintel section, which covers the transitions between the frame and the wall.

[0003] Assembling a door frame is time-consuming even for an experienced carpenter, as the individual parts are elongated and only joined together at their outermost edges in narrow contact areas. Even the precise alignment of the lining boards and the lintel section, which are usually laid on the floor with their narrow long edges facing down, at a 90° angle requires some time and several people or tools, since the lining boards, at least, are difficult to align due to their length, often 200 cm or more.

[0004] Furthermore, when assembling the door frames on the floor, access to the joints between the jambs and the lintel section is difficult. The narrow longitudinal sides of the jambs and the lintel section that rest on the floor, and the adjoining joints between the jambs and the lintel section, are outside the field of vision of the person assembling the door frame. Therefore, the jambs and the lintel section must be joined in this area essentially without visual feedback, i.e., by touch.

[0005] Against this background, the task for a specialist is to provide an assembly aid for a door frame that facilitates the connection of the lining boards and the lintel section of the door frame. DE202020000889 U1 discloses an assembly aid for the installation of door frames.

[0006] Furthermore, this problem is solved by an assembly aid according to claim 1. Preferred embodiments of the assembly aid are described in the dependent claims.

[0007] In a first aspect, the present invention relates to an assembly aid for assembling door frames. The assembly aid comprises four base elements. Each base element includes at least two parallel longitudinal rails for receiving a lining board of a door frame. At least two of the four base elements include a transverse rail for receiving a lintel section of a door frame. The base elements can be moved relative to each other to convert the assembly aid from a transport configuration to a working configuration and from the working configuration to the transport configuration. In the transport configuration, the assembly aid has smaller spatial dimensions in at least one direction than in the working configuration.In the working configuration, the base elements are positioned such that the longitudinal rails of all base elements run in one working plane and parallel to a longitudinal direction, that the longitudinal rails of a first pair of base elements are aligned with each other to accommodate a first lining board of a door frame, that the longitudinal rails of a second pair of base elements are aligned with each other to accommodate a second lining board of a door frame, that a distance between each pair of longitudinal rails of the first pair of base elements and two longitudinal rails of the second pair of base elements perpendicular to the longitudinal direction corresponds to a standardized distance, and that the transverse rail of a base element of the first pair of base elements is aligned with the transverse rail of a base element of the second pair of base elements.

[0008] In other words, the present invention relates to an assembly aid that facilitates the assembly of door frames, or simply frames. As already explained in the introduction, door frames are generally composed of at least three individual parts: two side lining boards and a lintel section connecting the two lining boards. The assembly aid presented here significantly simplifies the connection of these three individual parts of the door frame.

[0009] The assembly aid comprises four base elements, each with at least two longitudinal rails for holding the narrow sides or narrow longitudinal sides of the lining boards. The longitudinal rails can be, for example, U-shaped profiles or U-profiles attached to the base elements. In addition, at least two of the four base elements each have a transverse rail, which can also be formed by U-shaped profiles. The transverse rails extend essentially perpendicular to the longitudinal rails and are designed to hold the lintel section of the frame.

[0010] The four base elements are not rigidly connected but can be moved relative to each other. This movement of the four base elements serves to transform the assembly aid from a compact transport configuration to a working configuration. The transport configuration is intended for transporting the assembly aid, for example, in a vehicle or carrying it to the location on a construction site where the door frame is to be assembled. This location is subsequently referred to as the work site.

[0011] Once the work site has been reached, the assembly aid can be converted into its working configuration by moving the four base elements relative to each other. The specific arrangement of the four base elements and the longitudinal and transverse rails mounted on them in the working configuration is explained in more detail below. When the door frame has been fully assembled and installed in a wall opening, the assembly aid can again be converted from its working configuration to its transport configuration by moving the four base elements relative to each other.

[0012] The relative movement of the four basic elements during the transition from the working configuration to the transport configuration serves in particular to reduce the spatial dimensions of the assembly aid. Compared to the working configuration, the assembly aid in the transport configuration has smaller spatial dimensions in at least one spatial direction and preferably in two spatial directions; that is, the assembly aid is more spatially compact in the transport configuration than in the working configuration and therefore requires less space when it is loaded into a vehicle or transported through a building to a work site.

[0013] When the assembly aid is in its working configuration, sufficiently large dimensions are necessary to precisely align the lining boards and the lintel section of the frame. The working configuration is therefore defined by the arrangement of the longitudinal and transverse rails, in which the lining boards and the transverse section of the door frame are placed for assembly.

[0014] To achieve this, the base elements are first positioned so that the longitudinal rails of all base elements run in one plane and parallel to a longitudinal direction. In other words, in the working configuration, all longitudinal rails are aligned parallel to each other and run in or on the same working plane. The working plane can be defined, for example, by the surfaces of the base elements on which the longitudinal rails are arranged.

[0015] Furthermore, the longitudinal rails of the first pair of base elements are aligned with each other. This means that a longitudinal rail on the first base element of the first pair of base elements forms the extension of a longitudinal rail on the second base element of the pair. The longitudinal rails do not typically connect directly to each other, as the base elements of the first pair are regularly spaced apart longitudinally when the assembly aid is in its working configuration. At least by virtue of the spacing of the base elements, the longitudinal rails are also separated from each other longitudinally.

[0016] The aligned arrangement of two longitudinal rails on the first pair of base elements allows the same lining board to be inserted into two aligned longitudinal rails. This holds the lining board in place lengthwise over an extended distance and also aligns it precisely lengthwise.

[0017] Accordingly, the longitudinal rails of a second pair of base elements are also aligned with each other. Thus, on the two remaining base elements, the longitudinal rails are arranged such that a longitudinal rail on the first base element of the second pair forms an extension of a longitudinal rail on the second base element of the second pair, with the base elements of the second pair, and therefore the longitudinal rails mounted on them, being aligned longitudinally with each other. The second lining board of the door frame to be installed can then be positioned in the aligned longitudinal rails of the second pair of base elements. By arranging the lining board in the longitudinal rails of the second pair of base elements, it is aligned precisely parallel to the longitudinal direction.

[0018] In an exemplary preferred embodiment, in the working configuration the distance between the two base elements of the first pair of base elements in the longitudinal direction is identical to the distance between the base elements of the second pair of base elements in the longitudinal direction.

[0019] Furthermore, in the working configuration of the assembly aid, the base elements, and thus also the longitudinal rails arranged on them, are positioned relative to each other such that the distance between two aligned longitudinal rails on the first pair of base elements and two aligned longitudinal rails on the second pair of base elements corresponds to a standardized distance. In other words, for each longitudinal rail that is part of a base element of the first pair of base elements, there is a corresponding longitudinal rail on a base element of the second pair of base elements that extends parallel to it and is arranged at a standardized distance. This distance is determined perpendicular to the longitudinal direction, i.e., in the transverse direction.

[0020] In this context, a standardized distance refers to a distance specified in a common building standard, such as DIN 18100, for the distance between door jambs and door frames. For example, a standardized distance could be the clear opening dimension or the frame rebate dimension defined in DIN 18100. Depending on the region or country where the frames are to be installed, these distances may also be specified in a different standard. The specific dimension specified in the standard that corresponds to the standardized distance also depends on the measurement method. For instance, measuring from the inside edge to the inside edge of the longitudinal rails will result in a different standardized distance than measuring from the center of the longitudinal rails or their outer edges. The dimensions specified in the respective standards can be directly translated into suitable longitudinal rail spacings.

[0021] To assemble a door frame, the two lining boards of the frame are inserted into the longitudinal rails, which are spaced at the correct interval for the door frame. The longitudinal rails ensure that the lining boards are exactly parallel to each other and spaced at the standardized interval. Since several pairs of longitudinal rails with different standardized intervals are provided on the base elements, door frames for different door widths can be advantageously assembled on the same assembly aid.

[0022] Finally, the assembly aid has at least two cross rails mounted on two base elements. One cross rail is attached to a base element of the first pair of base elements, while the other cross rail is attached to a base element of the second pair of base elements. When the assembly aid is in its working configuration, the two cross rails are aligned with each other and parallel to one side. Thus, one cross rail can also be considered an extension of the other. The lintel section of a door frame, positioned at a right angle to the two lining boards thanks to the assembly aid, can then be inserted into the cross rails.Furthermore, since the two lining boards are arranged at the intended distance from each other and are held by the longitudinal and transverse rails, the two lining boards can be advantageously connected directly to the lintel section.

[0023] The assembly aid according to the invention thus advantageously enables the lining boards and the lintel section of a door frame to be arranged precisely relative to each other, both with regard to the spacing and the alignment of the sections. The door frame sections are also held by the longitudinal and transverse rails, allowing the carpenter to concentrate on joining the lining boards and the lintel section.

[0024] In a preferred embodiment, four parallel longitudinal rails for receiving door frame lining boards are arranged on each of the base elements such that, in the working configuration, four different standardized distances are formed between the longitudinal rails of the first pair of base elements and the longitudinal rails of the second pair of base elements.

[0025] In other words, in the preferred embodiment, each of the four base elements has four longitudinal rails. The assembly aid thus has a total of 16 longitudinal rails, arranged in pairs such that each pair accommodates a lining board in the working configuration. This results in four different standardized distances between the longitudinal rails of the first pair of base elements and the longitudinal rails of the second pair of base elements. These four standardized distances can, for example, correspond to the four most common widths of door openings used in a particular region or country.

[0026] In an exemplary preferred embodiment, the distances between the inner edges of the longitudinal rails of the first pair of base elements and the inner edges of the longitudinal rails of the second pair of base elements, measured from the inside out, are 570 mm, 695 mm, 820 mm, and 945 mm. In other words, the distance between the innermost longitudinal rails, which are arranged closest to each other perpendicular to the longitudinal direction, is 570 mm, measured from inner edge to inner edge. The longitudinal rails closest to the innermost longitudinal rails are spaced 695 mm apart from each other, from inner edge to inner edge. The distance between the outermost longitudinal rails adjacent to these is 820 mm, and the distance between the outermost longitudinal rails is 945 mm, measured perpendicular to the longitudinal direction.

[0027] It is further preferred if the assembly aid is configured such that it can be converted from the transport configuration to the working configuration and from the working configuration to the transport configuration solely by translational movements of the base elements. In other words, the preferred embodiment provides that the base elements can only be converted from the transport configuration to the working configuration by movements performed in a single plane. Similarly, the reverse conversion of the assembly aid from the working configuration to the transport configuration is also carried out in the preferred embodiment solely by relative movements of the base elements in a single plane.

[0028] In another preferred embodiment, the base elements are connected to each other via guide rails in such a way that the base elements can be moved relative to each other parallel to the working plane in order to transfer the assembly aid from the transport configuration to the working configuration and from the working configuration to the transport configuration.

[0029] In other words, in the preferred embodiment, the base elements are connected to each other via guide rails. The guide rails can, for example, be formed by telescopic rails having a rectangular cross-section.

[0030] For example, each of the four base elements can be fitted with a guide tube with a rectangular cross-section, i.e., a hollow profile with a rectangular cross-section, running parallel to the longitudinal direction. The guide tubes on the first pair of base elements are aligned with each other. The guide tubes on the second pair of base elements are also aligned with each other. Rectangular connecting tubes, i.e., profiles with a regular cross-section, are arranged within the guide tubes, connecting the guide tubes of the base elements. The combination of guide and connecting tubes forms the guide rails, along which the base elements can be moved relative to each other in the longitudinal direction. The guide rails thus define and limit the relative movement of the base elements in the longitudinal direction.

[0031] A suitable combination of rectangular guide and connecting tubes extending in the transverse direction and attached to the base elements can, for example, form the guide rails that define and limit the relative movement of the base elements in the transverse direction.

[0032] Preferably, the guide rails limit the position of the base elements relative to each other such that, at maximum distance between the base elements, the assembly aid is in its working configuration, and at minimum distance between the base elements, it is in its transport configuration. The guide rails define and limit the positions of the base elements relative to each other in such a way that, at minimum distance, the assembly aid is in its transport position, thus exhibiting the most compact spatial dimensions possible. A minimum distance between the base elements can also mean that the base elements are directly adjacent to each other. Conversely, when the base elements are pulled as far apart as possible, the assembly aid, in the preferred embodiment, is in its working configuration, in which the longitudinal rails are arranged at the specified standardized intervals.By simply moving the base elements back and forth between the extreme positions to transfer the assembly aid between the working configuration and the transport configuration, this simplifies the assembly of the assembly aid and also ensures that the assembly aid enables an exact assembly of the door frames.

[0033] In another preferred embodiment, each base element has a base plate on which the longitudinal rails and, if present, the transverse rails are arranged. The base plates can be made, for example, of plywood, plastics, composite materials, or metals such as aluminum. The base plates can also be used, among other things, to position the assembly aid on standard sawhorses in the working position. This allows the door frame to be assembled at an ergonomically comfortable working height.

[0034] Furthermore, it is preferred if the longitudinal rails and, where present, the transverse rails are arranged on a first surface of the base plate, while the guide rails are arranged on a second surface of the base plate, which is opposite the first surface of the base plate. In the preferred embodiment, the longitudinal and transverse rails are thus each attached to one surface of the base plate, while the guide rails are attached to the opposite surface of the base plate. This advantageously keeps the work surface on which the longitudinal and transverse rails are arranged free of the guide rails, so that they do not obstruct the assembly of the door frame.

[0035] In a further preferred embodiment, the base plates of the base elements, which include a transverse rail, have a recess in the area where one direction of extension of the transverse rail of the base element intersects the directions of extension of the two or more longitudinal rails of the base element. In other words, the base plates on which a transverse rail is arranged have a recess in the area where the lining boards are connected to the lintel section. This allows access to the door frame in the area of ​​the joint between the lining board and the lintel section from both above and below. In particular, this ensures that the area of ​​the joint formed by the narrow sides of the door frame resting on the mounting aid is not obstructed from the view of the person installing the frame. Rather, the person can also view the frame from below.This is especially true if the assembly aid is jacked up, i.e., placed on work stands.

[0036] Preferably, each of the four base elements has a cross rail. The cross rail of a base element of the first pair of base elements is aligned with the cross rail of a base element of the second pair of base elements. By providing a cross rail on each of the four base elements, the mounting aid can advantageously be used in different directions. The lintel section can thus be placed on any of the four base elements, further increasing the flexibility of the mounting aid's use.

[0037] Finally, it is preferable if the four basic elements of the assembly aid are identical in design. This reduces the manufacturing effort required to build the assembly aid, as only one version of the basic elements needs to be produced.

[0038] The present invention is described in more detail below with reference to the drawing showing an embodiment of an assembly aid. Figure 1 shows a top view of a first embodiment of an assembly aid in a transport configuration, Figure 2 shows a perspective view of the embodiment from Figure 1 In the transport configuration, Figure 3 shows another perspective view of the embodiment. Figure 1 in the transport configuration, Figure 4 shows a top view of the embodiment from Figure 1 in a working configuration, Figure 5 shows a perspective view of the embodiment. Figure 1 also in the working configuration, Figure 6 shows another perspective view of the embodiment from Figure 1 also in the working configuration, Figure 7 shows a top view of a single base element of the embodiment. Figure 1Figure 8 shows a perspective view of the basic element from Figure 7 and Figure 9, another perspective view of the basic element from Figure 7 .

[0039] In the Figures 1-9 Figure 1 shows an embodiment of an assembly aid 1 for a door frame. Specifically, the figures show... Figures 1-3 Different views of assembly aid 1 in a transport configuration, which Figures 4-6 show different views of the assembly aid 1 in a working configuration and the Figures 7-9 Finally, different views of a basic element 3b, 3c of the assembly aid 1 are shown.

[0040] The assembly aid 1 comprises a total of four base elements 3a, 3b, 3c, 3d. Each base element 3a, 3b, 3c, 3d is based on a base plate 5, on which four longitudinal rails 7a, 7b, 7c, 7d and one transverse rail 9 are arranged. All longitudinal rails 7a, 7b, 7c, 7d run parallel to each other and parallel to a longitudinal direction 11 in a working plane. The transverse rails 9 also extend in the working plane, but perpendicular to the longitudinal direction 11 and thus parallel to a transverse direction 13. The longitudinal direction 11 and the transverse direction 13 are only connected in the Figure 1 , 4 and 7 drawn, showing a top view of the assembly aid 1 or the base element 3b, 3c.

[0041] In the embodiment shown in the figures, both the longitudinal rails 7a, 7b, 7c, 7d and the transverse rails 9 are formed by U-shaped profiles and a door frame 19 is provided for receiving lining boards 15a, 15b or a lintel section 17. An exemplary door frame 19 is shown in the Figures 4-6The width of the U-profiles perpendicular to their respective directions of extension, i.e., in the case of the longitudinal rails 7a, 7b, 7c, 7d perpendicular to the longitudinal direction 11 and in the case of the transverse rail 9 perpendicular to the transverse direction 13, was chosen to correspond to the usual thickness of the narrow side of the lining boards 15a, 15b or the lintel section 17, or to accommodate lining boards 15a, 15b and lintel section 17 of standard dimensions. The U-profiles can be made of a metal such as aluminum, for example. Padding made of an elastic material can be arranged within the U-profile to prevent damage to the door frame 19 by the metallic U-profiles.

[0042] In the Figures 1-3The assembly aid 1 is shown in a transport configuration in which the four base elements 3a, 3b, 3c, 3d are in direct contact with one another. This transport configuration is intended for transporting the assembly aid 1, for example, in a vehicle or carrying it to a work site on a construction site or in a building. To ensure that the four base elements 3a, 3b, 3c, 3d remain in contact and thus the assembly aid 1 stays in the transport configuration, locking devices can be provided to connect the base elements 3a, 3b, 3c, 3d to each other and prevent any relative movement between them. These locking devices are not shown in the figures. For example, commercially available toggle latches or storm hooks can be used as locking devices.

[0043] The Figures 4-6The same embodiment is shown. However, the assembly aid 1 has meanwhile been transferred into the working configuration by moving the four base elements 3a, 3b, 3c, 3d parallel to or away from each other in the working plane. Already from the comparison of the Figures 4-6 and 1-3 It is immediately apparent that the spatial dimensions of the assembly aid 1 in the transport configuration are smaller in both the longitudinal direction 11 and the transverse direction 13 than in the working configuration. The assembly aid 1 is therefore more compact in two spatial directions (the longitudinal direction 11 and the transverse direction 13) in the transport configuration than in the working configuration and can therefore be transported more easily.

[0044] In the working configuration, the four basic elements 3a, 3b, 3c, 3d are no longer directly adjacent to each other, but are spaced apart both in the longitudinal direction 11 and in the transverse direction 13. The distance 18a between the basic elements 3a, 3c in the longitudinal direction 11 is identical to the distance 18b between the basic elements 3b, 3d in the longitudinal direction 11. In the transverse direction, the distance 20a between the basic elements 3a, 3b is identical to the distance 20b between the basic elements 3c, 3d.

[0045] The base elements 3a, 3b, 3c, 3d are positioned relative to each other such that each longitudinal rail 7a, 7b, 7c, 7d is aligned with a longitudinal rail 7a, 7b, 7c, 7d of another base element 3a, 3b, 3c, 3d. For example, the longitudinal rail 7a of the first base element 3a forms the extension of the longitudinal rail 7a of the third base element 7c. Similarly, the longitudinal rail 7c of the second base element 3b forms the extension of the longitudinal rail 7c of the fourth base element 3d.

[0046] The basic elements 3a, 3b, 3c, 3d can thus be combined to form a first pair 21a of basic elements 3a, 3c and a second pair 21b of basic elements 3b, 3d, wherein the longitudinal rails 7a, 7b, 7c, 7d of the pairs 21a, 21b are aligned with each other and serve to receive a lining board 15a, 15b. In the Figures 4-6For example, it is shown that a first lining board 15a of the door frame 19 was inserted into the longitudinal rails 7a of the first pair 21a, while a second lining board 15b of the door frame 19 was inserted into the longitudinal rails 7a of the second pair 21b. The longitudinal rails 7a, 7b, 7c, 7d support the lining boards 15a, 15b and align them exactly parallel to the longitudinal direction 11.

[0047] Furthermore, the assembly aid 1 is configured such that the longitudinal rails 7a, 7b, 7c, 7d are positioned in pairs at a standardized distance when the assembly aid is in its working configuration. For example, the longitudinal rails 7d of the first pair 21a of base elements 3a, 3c are arranged at a first standardized distance of 570 mm from the longitudinal rails 7d of the second pair 21b of base elements 3b, 3d, with this distance and the subsequent distances being measured between the inner edges of the longitudinal rails 7a, 7b, 7c, 7d. The distance is also measured perpendicular to the extension direction of the longitudinal rails 7a, 7b, 7c, 7d, and thus perpendicular to the longitudinal direction 11.Accordingly, the longitudinal rails 7c of the first pair 21a of base elements 3a, 3c are arranged at a second standardized distance of 695 mm from the longitudinal rails 7c of the second pair 21b of base elements 3b, 3d; the longitudinal rails 7b of the first pair 21a of base elements 3a, 3c are arranged at a third standardized distance of 820 mm from the longitudinal rails 7b of the second pair 21b of base elements 3b, 3d; and the longitudinal rails 7a of the first pair 21a of base elements 3a, 3c are arranged at a fourth standardized distance of 945 mm from the longitudinal rails 7a of the second pair 21b of base elements 3b, 3d. These standardized distances are specified by DIN 18100, which defines the dimensions of door openings in Germany.

[0048] The lining boards 15a, 15b are thus not only aligned parallel to the longitudinal direction 11 by means of the longitudinal rails 7a, 7b, 7c, 7d, but are also advantageously placed at one of four standardized distances to each other in order to mount the door frame 19 to fit the respective door opening.

[0049] Corresponding to the longitudinal rails 7a, 7b, 7c, 7d, the transverse rails 9 of each pair of base elements 3a, 3b, 3c, 3d are also aligned with each other in the working configuration, so that a lintel section 17 can be inserted into each pair of transverse rails 9. The lintel section is thus aligned perpendicular to the lining boards 15a, 15b by means of the transverse rails 9.

[0050] This also advantageously accommodates the four different standardized widths, which are available with the assembly aid 1 from the Figures 1-9Since only one position is necessary for a lintel section 17, the longitudinal rails 7a, 7b, 7c, 7d do not extend to the connection areas 23 where the lintel section 17 is connected to the lining boards 15a, 15b. Furthermore, a recess 25 has been provided in the base plates 5 of the base elements 3a, 3b, 3c, 3d in the connection areas 23. The recesses 25 advantageously allow the connection between the lining boards 15a, 15b and the lintel sections 17 to be viewed from different directions, and in particular from below.

[0051] This applies particularly when the assembly aid 1 is stored on sawhorses. For example, in the working configuration with the base plates 5 of the base elements 3a, 3b, 3c, 3d, the assembly aid 1 can be placed on the sawhorses, which additionally allows the person assembling the frame to carry out the assembly at a back-friendly working height.

[0052] In the exemplary embodiment in the Figures 1 to 9 It is also provided that each base element 3a, 3b, 3c, 3d has a cross rail 9. This allows the assembly aid 1 to be used in two different orientations.

[0053] Especially the Figures 3 , 6 and 9 Figure 27a and 27b show an arrangement of guide rails that limit the possible movement of the base elements 3a, 3b, 3c, and 3d relative to each other in terms of displacements in the working plane and also the maximum distance between the base elements 3a, 3b, 3c, and 3d. The guide rails 27a and 27b are telescopic rails made of tubes with a rectangular cross-section and are arranged on a surface 31 of the base plates 5 of the base elements, which faces away from a surface 33 on which the longitudinal and transverse rails 7a, 7b, 7c, 7d, and 9 are arranged.

[0054] Two guide rails 27a, 27b are attached to each base element 3a, 3b, 3c, 3d, with one guide rail 27a extending parallel to the longitudinal direction 11 and one guide rail 27b extending parallel to the transverse direction 13. The guide rails 27a, 27b are connected to each other by rectangular connecting tubes 29. The guide rails 27a, 27b limit the maximum distance at which the base elements 3a, 3b, 3c, 3d can be positioned from one another, thus defining the working configuration. Furthermore, the guide rails 27a, 27b ensure that the longitudinal and transverse rails 7a, 7b, 7c, 7d, 9 are aligned with each other and positioned at a standardized distance from one another. Reference symbol list

[0055] 1 Assembly aid 3a, 3b, 3c, 3d Base element 5 Base plate 7a, 7b, 7c, 7d Longitudinal rail 9 Transverse rail 11 Longitudinal direction 13 Transverse direction 15a, 15b Lintel board 17 Lintel section 18a, 18b Longitudinal spacing of base elements 19 Door frame 20a, 20b Transverse spacing of base elements 21a, 21b Pair of base elements 23 Connection area 25 Recess 27a, 27b Guide rails 29 Connecting tube 31 Surface 33 Surface

Claims

1. An assembly aid (1) for putting together a door frame (19), wherein the assembly aid (1) comprises four base elements (3a, 3b, 3c, 3d), wherein each base element (3a, 3b, 3c, 3d) comprises at least two longitudinal rails (7a, 7b, 7c, 7d) running parallel to each other for holding a lining board (15a, 15b) of a door frame (19), wherein at least two of the four base elements (3a, 3b, 3c, 3d) comprise a transverse rail (9) for holding a lintel section (17) of a door frame (19), wherein the base elements (3a, 3b, 3c, 3d) can be moved relative to each other in order to switch the assembly aid (1) from a transport configuration to a working configuration and from the working configuration to the transport configuration, wherein the assembly aid (1) has smaller spatial dimensions at least in one spatial direction in the transport configuration than in the working configuration, and wherein the base elements (3a, 3b, 3c, 3d) are positioned in such a way in the working configuration that the longitudinal rails (7a, 7b, 7c, 7d) of all base elements (3a, 3b, 3c, 3d) run in a working plane and parallel to a longitudinal direction (11), that the longitudinal rails (7a, 7b, 7c, 7d) of a first pair of base elements (3a, 3b, 3c, 3d) are aligned with each other, so as to hold a first lining board (15a, 15b) of a door frame (19), that the longitudinal rails (7a, 7b, 7c, 7d) of a second pair of base elements (3a, 3b, 3c, 3d) are aligned with each other, so as to hold a second lining board (15a, 15b) of a door frame (19), that a distance between a respective two longitudinal rails (7a, 7b, 7c, 7d) of the first pair of base elements (3a, 3b, 3c, 3d) and two longitudinal rails (7a, 7b, 7c, 7d) of the second pair of base elements (3a, 3b, 3c, 3d) perpendicular to the longitudinal direction (11) corresponds to a standardized distance, and that the transverse rail (9) of a base element (3a, 3b, 3c, 3d) of the first pair of base elements (3a, 3b, 3c, 3d) is aligned with the transverse rail (9) of a base element (3a, 3b, 3c, 3d) of the second pair of base elements (3a, 3b, 3c, 3d).

2. The assembly aid (1) according to claim 1, wherein four longitudinal rails (7a, 7b, 7c, 7d) running parallel to each other for holding lining boards (15a, 15b) of door frames (19) are arranged on each of the base elements (3a, 3b, 3c, 3d) in such a way in the working configuration as to yield four different standardized differences between the longitudinal rails (7a, 7b, 7c, 7d) of the first pair of base elements (3a, 3b, 3c, 3d) and the longitudinal rails (7a,7b,7c,7d) of the second pair of base elements (3a, 3b, 3c, 3d).

3. The assembly aid (1) according to one of the preceding claims, wherein the assembly aid (1) is configured in such a way that the assembly aid (1) can be switched from the transport configuration to the working configuration and from the working configuration to the transport configuration exclusively by translational movements of the base elements (3a, 3b, 3c, 3d).

4. The assembly aid (1) according to one of the preceding claims, wherein the base elements (3a, 3b, 3c, 3d) are connected with each other by guide rails in such a way that the base elements (3a, 3b, 3c, 3d) can be shifted relative to each other parallel to the working plane, so as to switch the assembly aid (1) from the transport configuration to the working configuration and from the working configuration to the transport configuration.

5. The assembly aid (1) according to claim 4, wherein the guide rails (27a, 27b) border a position of the base elements (3a, 3b, 3c, 3d) relative to each other in such a way that the assembly aid (1) is in the working configuration given a maximum distance between the base elements (3a, 3b, 3c, 3d), and that the assembly aid (1) is in the transport position given a minimum distance between the base elements (3a, 3b, 3c, 3d).

6. The assembly aid (1) according to one of the preceding claims, wherein each base element (3a, 3b, 3c, 3d) has a base plate (5) on which the longitudinal rails (7a, 7b, 7c, 7d) and (if present) transverse rails (9) are arranged.

7. The assembly aid (1) according to claim 4 or 5 and according to claim 6, wherein the longitudinal rails (7a, 7b, 7c, 7d) and (if present) the transverse rails (9) are arranged on a first surface of the base plate (5), and the guide rails (27a, 27b) are arranged on a second surface of the base plate (5) that lies opposite the first surface.

8. The assembly aid (1) according to claim 6 or 7, wherein the base plates of the base elements that have a transverse rail (9) have a recess in the area in which a extension direction of the transverse rail (9) of the base element (3a, 3b, 3c, 3d) intersects the extension directions of the two or more longitudinal rails (7a, 7b, 7c, 7d) of the base element (3a, 3b, 3c, 3d).

9. The assembly aid (1) according to one of the preceding claims, wherein each of the four base elements (3a, 3b, 3c, 3d) has a transverse rail (9), and wherein the transverse rail (9) of a base element (3a, 3b, 3c, 3d) of the first pair of base elements (3a, 3b, 3c, 3d) is aligned with the respective transverse rail (9) of a base element (3a, 3b, 3c, 3d) of the second pair of base elements (3a, 3b, 3c, 3d).

10. The assembly aid (1) according to one of the preceding claims, wherein the four base elements (3a, 3b, 3c, 3d) are identical in design.

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