Connecting parts, furniture, and assembly methods.

Abstract

The invention relates to a connecting piece for furniture (1) comprising a cast body (4, 4') which can be fixed to a first furniture part (2) and on which a clamping piece (5) is held movably, and a holding piece (6) which can be fixed to a second furniture part (3) which can be clamped through the clamping piece (5) to fix the first furniture part (2) to the second furniture part (3), wherein the inlet part (10) is formed in one piece with the cast body (4, 4'), connected to the cast body (4, 4') through at least one retaining notch (19) with a predetermined fracture point, and the inlet part (10) can be inserted into the groove (8) of the first furniture part (2) into the retaining hole (22) of the cast body (4, 4') to fix the cast body (4, 4') by breaking the predetermined fracture point. Furthermore, the invention relates to furniture (1) as well as a method of assembling such furniture, which includes a first furniture component (2) and a second furniture component (3) with the aforementioned connecting parts.

Description

[0001] Connecting fitting, furniture and assembly methods

[0002] The present invention relates to a connecting fitting for furniture with a shaped body which can be fixed in a first furniture part and on which a clamping element is movably held, and a holding part which can be fixed to a second furniture part and which can be clamped via the clamping element to fix the first furniture part to the second furniture part, a piece of furniture and a method for assembling a first furniture part to a second furniture part.

[0003] DE 10 2009 011 845 A1 discloses a connecting fitting for connecting two workpieces, which can be inserted into two workpiece receptacles. The connecting fitting comprises a tension element that passes through a holding body and over which a displacement body can be moved to spread anchoring bodies outward. This allows a clamping fixation of the connecting fitting and the two workpieces. This connecting fitting requires a large volume, and large recesses must be milled into the two workpieces, which is comparatively complex. Furthermore, a support body on the outside of a workpiece must support the tension element. This design requires a large number of components for the connecting fitting.

[0004] It is therefore an object of the present invention to provide a connecting fitting with a compact structure that can be easily mounted on two furniture parts.

[0005] This object is achieved by a connecting fitting having the features of claim 1, a piece of furniture having the features of claim 10 and a method for assembly having the features of claim 13.

[0006] A connecting fitting for furniture according to the invention comprises a molded body which can be secured in a first furniture part and on which a clamping element is movably held, and a holding part which can be secured to a second furniture part and which can be clamped to the second furniture part via the clamping element to fix the first furniture part. An impact part is formed integrally with the molded body and is connected to the molded body via at least one holding web with a predetermined breaking point. The impact part can be impacted into a receptacle in the molded body, breaking the predetermined breaking point, to fix the molded body in a recess in the first furniture part. This allows the molded body to first be inserted into the recess in the first furniture part, then the impact part can be impacted into the receptacle of the molded body and the molded body to be non-positively fixed in the recess of the first furniture part.This eliminates the need to provide a support part on an outer side of the first furniture part, since the molded body is held clamped in the recess by driving in the driving part.

[0007] Preferably, the impact part comprises at least one wedge that tapers in the impact direction. The wedge can, for example, be formed substantially parallel to the impact direction on one side, so that the movement of the wedge can be guided, and inclined to the impact direction on the opposite side, for example, at an angle between 5° and 20°.

[0008] The molded body preferably has at least one flexible web that expands outward perpendicular to the impact direction when the impact part is impacted. The web can be connected to the molded body in a bendable manner and can optionally have a free end or be designed as a bridge web connected to the molded body via multiple connecting sections. Preferably, the at least one web is connected to the molded body via a section arranged in the impact direction, so that the web can expand outward with its free end when impacted.

[0009] In a further embodiment, the impact part and the molded body have locking means, and the impact part can be secured to the molded body in the impacted position. The locking means can be, for example, locking projections, locking webs, or locking recesses, but also teeth or other profiles to allow the impact part to be secured to the molded body in one or more positions.

[0010] For improved force distribution, the impact part can comprise two wedges that are arranged at a distance from one another and can each be impacted into a channel-shaped receptacle in the molded part. Each wedge can then spread a flexible web of the molded body outwards, with the forces perpendicular to the impact direction canceling each other out. The two wedges can be guided on the inside along a channel in the impact direction and preferably only have a contact surface on the outside that is inclined to the impact direction for spreading out one web at a time. To increase the holding forces, the at least one flexible web can have a profile on an outer side facing the first furniture part, for example ribs, teeth or other profiles.

[0011] The retaining part is preferably designed as a bolt or comprises a bolt that engages the molded body. The bolt can be fixed in the second furniture part via a dowel or other fastening means. The bolt preferably has a widened head with a tool holder designed to engage the clamping element.

[0012] The clamping element is preferably rotatably mounted on the mold body and can be rotated via a tool insert. The clamping element can have a curved guide, with a head of the holding part resting in the curved guide, so that the holding part is clamped into the mold body by rotating the clamping element.

[0013] Preferably, stepped structures are formed in the longitudinal direction on at least one side of the molded body and / or the insertion part. Such stepped structures comprise steps or profiles that extend substantially parallel to the insertion direction and thus facilitate the insertion of the molded body into a recess. The steps can provide a guide aid, which then provides additional support against twisting in the assembled position. The stepped structures are preferably located on the rounded side surfaces of the molded body and / or the insertion part.

[0014] In the furniture according to the invention, a first furniture part and a second furniture part are connected to one another with a connecting fitting according to the invention. Preferably, the driven-in part is arranged substantially flush with one end face of the first furniture part in the driven-in position. The driven-in part can thus protrude at the end face before driving-in, so that the installer only has to drive the driven-in part into the receptacle on the molded body, so that one end face, together with a surface of the driven-in part, essentially forms a plane. This is visually advantageous and enables the subsequent insertion of a retaining part into the molded body, which simplifies assembly.

[0015] The two furniture parts and the molded body are preferably made of the same material. The molded body can be formed at least partially, in particular predominantly, from a biogenic material, preferably predominantly or entirely from a plant material, in particular a pressed fiber material. The biogenic material can comprise materials such as wood components, cores, shells, natural polymers, or pressed fiber materials. Alternatively, the molded body can of course also be made of plastic or metal if the furniture part is made of the same material. This monomaterial nature of the molded body and furniture part ensures ecological waste disposal and takes sustainability into account. Furthermore, the disposal and processing of raw materials is improved because there is no need to separate the materials.

[0016] In a method for assembling a first furniture part to a second furniture part, a molded body with a movable clamping element is first inserted into a recess in a first furniture part. A holding part is fixed to a second furniture part. An impact part formed integrally with the molded body is then driven into at least one receptacle on the molded body by destroying a predetermined breaking point, so that the molded body is clamped in the first furniture part. The holding part is then inserted into the molded body and the clamping element in order to then clamp the holding part via the clamping element. This allows a stable connection between the two furniture parts to be created in just a few simple assembly steps. The two furniture parts can be held together by several connecting fittings.

[0017] The invention will be explained in more detail below using several exemplary embodiments with reference to the accompanying drawings. They show:

[0018] Figure 1 is a perspective view of a piece of furniture according to the invention;

[0019] Figure 2 is an exploded view of the furniture of Figure 1;

[0020] Figure 3 is a perspective view of the first furniture part without

[0021] molded body;

[0022] Figure 4 shows a view of the first furniture part when inserting the molded bodies;

[0023] Figure 5 shows a view of the first furniture part with the insertion parts in the inserted position; Figure 6 shows a view of the second furniture part with the retaining parts mounted;

[0024] Figures 7A and 7B show two views of the molded body in an initial position;

[0025] Figures 8A and 8B show two views of the molded body of Figure 7 in the folded position, and

[0026] Figure 9 is a view of a modified molded body for a connecting fitting.

[0027] A piece of furniture 1 comprises a first furniture part 2 and a second furniture part 3. The two furniture parts 2 and 3 are designed as furniture panels and can be made of a wood-based material, such as MDF, HDF, or particle board. The two furniture parts 2 and 3 are held together by a connecting fitting, which, in the assembled position, is completely housed within the furniture parts 2 and 3 and is therefore not visible.

[0028] Figure 2 shows the piece of furniture 1 with the connecting fitting. The connecting fitting comprises a shaped body 4 that can be inserted into a recess in the first furniture part 2. The shaped body 4 serves to accommodate a clamping element 5 that is rotatably mounted in the shaped body 4. The clamping element 5 comprises a curved guide 13 and a tool holder 14. Two holding parts 6, which are designed as bolts, are mounted on the second furniture part 3, with one end of the bolt being fixed in an opening 7 on the second furniture part 3. For this purpose, a thread or a dowel can be provided on the bolt to fix the holding part 6 to the second furniture part 3.

[0029] For the assembly of the connecting fitting, at least one recess 8 is made in the first furniture part 2, preferably by milling, wherein each recess 8 has a shape adapted to the contour of the molded body 4. The recess 8 is essentially rectangular in cross-section, with the two end faces of the rectangle being rounded, although the recess 8 can also have a different geometry. The recess 8 is open towards an end face 11 of the plate-shaped first furniture part 2. Furthermore, an opening 9 is made on a top or bottom side of the plate-shaped first furniture part 2, through which opening 9 access to the tool holder 14 of the clamping element 5 is achieved.

[0030] In Figure 4, a molded body 4 with a clamping element 5 is inserted into each of the two recesses 8 on the first furniture part 2. The molded bodies 4 can be loosely inserted into the recesses 8, and to fix the molded body 4 in the recess 8 of the first furniture part 2, the insert part 10 protruding from the end face 11 is driven in.

[0031] Figure 5 shows the inserted position, and it can be seen that an outer surface of the insertion part 10 is substantially flush with the end face 11 of the first furniture part 2. By inserting the insertion part 10, the molded body 4 is clamped into the first furniture part 2.

[0032] Figure 6 shows the second furniture part 3, to which the two holding parts 6 are fixed. The holding parts 6 protrude essentially perpendicularly from a flat plane of the plate-shaped second furniture part 3 and have a widened head 12 with a tool holder, which can now be inserted into a channel 15 on the molded body 4 until the head 12 engages the clamping element 5. The head 12 then rests against the curved guide 13 of the clamping element 5, and by rotating the clamping element 5, the holding part 6 can be pulled towards the clamping element 5 in order to clamp the second furniture part 3 to the first furniture part 2.

[0033] In Figures 7A and 7B, the molded body 4 is shown without the rotatable clamping element 5. The molded body 4 comprises a circular opening 23 for the clamping element 5, which is rotatably mounted therein. To prevent the clamping element 5 from falling out in the axial direction, a guide element 24 is provided in the opening 23. This guide element engages the curved guide 13 and thus ensures that the clamping element 5 is held captively on the molded body 4.

[0034] The molded body 4 comprises the impact part 10, which is formed integrally with the molded body 4 in an initial position. For this purpose, the impact part 10 is connected to the channel 15 for receiving the holding part 6 via two retaining webs 19. The retaining webs 19 include a predetermined breaking point, so that they are destroyed when the impact part 10 is struck in.

[0035] The impact part 10 comprises two wedges 16 arranged at a distance from one another, which are formed on the inner side substantially parallel to the impact direction, but are inclined to the impact direction on an outer side 17, for example, at an angle between 5° and 20°. The outer side 17 tapers in the impact direction up to the retaining web 19. Furthermore, a locking projection 18 is formed on the outer side 17, which serves to lock the impact part 10 in the driven position.

[0036] The molded body 4 comprises two spaced-apart receptacles 22, into each of which a wedge 16 of the impact part 10 can be inserted. On the outside of each receptacle 22, there is a flexible web 20 that is bent outward when the impact part 10 is impacted. The webs 20 are connected to the molded body 4 in the impact direction and point with their free ends toward the impact part 10. On an inner side of each web 20, projections 21 are provided, between which a locking receptacle is formed, into which the locking projection 18 on the wedge 16 can be inserted.

[0037] On opposite sides of the molded body 4 and the insertion part 10, stepped structures 26 are formed with steps or profiles that extend essentially parallel to the insertion direction. The stepped structures 26 on the rounded side surfaces facilitate the insertion of the molded body 4 into a recess, as the steps provide guidance. Furthermore, these stepped structures 26 provide additional support against twisting in the assembled position.

[0038] Figures 8A and 8B show the molded body 4 after the insertion of the insertion part 10. The two wedges 16 have been inserted into the receptacles 22, and the webs 20 have been spread outward over the wedges 16.

[0039] This movement perpendicular to the impact direction ensures a clamping fixation of the shaped body 4 in the recess 8 of the first furniture part 2. The locking projection 18 engages in the locking receptacle between the two projections 21. In this impacted position, the holding part 6 can now be inserted into the channel 15 of the shaped body 4 up to the clamping element 5 (not shown) in order to clamp the two furniture parts 2 and 3 against each other.

[0040] Figure 9 shows a modified embodiment of a molded body 4', which is designed as in the previous exemplary embodiment, except for the provision of profiles 25 on the outside of the flexible webs 20. The flexible webs 20 have, at least in part, a profile 25 in the form of ribs and grooves that extend perpendicular to the insertion direction. When the flexible webs 20 are spread apart, the ribs engage with the walls of the recess 8 of the first furniture part 2 and ensure optimized fastening of the molded body 4'. Stepped structures 26 are formed on the rounded side surfaces, which ensure a more favorable stress introduction into the furniture parts 2, 3 during insertion.

[0041] To assemble the two furniture parts 2 and 3, the molded body 4 or 4' on the first furniture part 2 is initially only partially inserted into the recess 8, and then the impact part 10 is impacted using a tool, such as a hammer, until the molded body 4 or 4' is fully inserted into the first furniture part 2 and clamped into the recess 8 of the first furniture part 2. During this process, the predetermined breaking points between the molded body 4, 4' and the impact part 10 break. The holding part 6 is fixed to the second furniture part 3. The holding part 6 can then be inserted into the molded body 4 or 4' until the head 12 engages the curved guide 13 of the clamping element 5, so that the holding part 6 is then pulled into the first furniture part 2 by rotating the clamping element 5, so that the second furniture part 3 is clamped to the first furniture part 2.

[0042] In the illustrated embodiments, two connecting fittings are provided between the first furniture part 2 and the second furniture part 3. It is also possible to mount only a single connecting fitting or more than two connecting fittings.

[0043] The molded body 4, 4' preferably consists of the same material as the first furniture part 2, so that subsequent material separation can be omitted due to the monomaterial nature.

[0044] In a particularly preferred embodiment, the molded body 4, 4' and the wrapping part 10 are made at least partially of a plant material, in particular of a pressed fiber material. This pressing process creates stepped structures 26 in the longitudinal direction on the outside of the end faces of the molded bodies 4, 4' and the wrapping part 10, because steps, depending on the pressing direction, are easier to produce with this method than curves.

[0045] 1 furniture

[0046] 2 first piece of furniture

[0047] 3 second piece of furniture

[0048] 4, 4' form body

[0049] 5 clamping element

[0050] 6 Holding part

[0051] 7 Opening

[0052] 8 recess

[0053] 9 Opening

[0054] 10 Impact part

[0055] 11 Front side of the first furniture part

[0056] 12 heads

[0057] 13 Curve guidance

[0058] 14 Tool holder

[0059] 15 channels

[0060] 16 wedge

[0061] 17 Outside

[0062] 18 locking projection

[0063] 19 Stop bridge

[0064] 20 jetty

[0065] 21 projections

[0066] 22 recording

[0067] 23 Opening

[0068] 24 Guide element

[0069] 25 Profiling

[0070] 26 Level structure

Claims

Claims 1. A connecting fitting for furniture (1) comprising a shaped body (4, 4') which can be secured in a first furniture part (2) and on which a clamping element (5) is movably held, and a holding part (6) which can be secured to a second furniture part (3) and which can be clamped via the clamping element (5) to fix the first furniture part (2) to the second furniture part (3), characterized in that an impact part (10) is formed integrally with the shaped body (4, 4'), which is connected to the shaped body (4, 4') via at least one holding web (19) with a predetermined breaking point, and the impact part (10) can be driven into a receptacle (22) of the shaped body (4, 4') in a recess (8) of the first furniture part (2) while breaking the predetermined breaking point.

2. Connecting fitting according to claim 1, characterized in that the impact part (10) comprises at least one wedge (16) which tapers in the impact direction.

3. Connecting fitting according to claim 1 or 2, characterized in that the shaped body (4, 4') has at least one flexible web (20) which spreads outwards perpendicular to the direction of impact when the impact part (10) is impacted.

4. Connecting fitting according to one of the preceding claims, characterized in that the impact part (10) and the shaped body (4, 4') have locking means and the impact part (10) can be locked to the shaped body (4, 4') in the impacted position.

5. Connecting fitting according to one of the preceding claims, characterized in that the impact part (10) has two wedges (16) which can each be impacted into a channel-shaped receptacle (22) of the molded part (4, 4').

6. Connecting fitting according to one of the preceding claims 3 to 5, characterized in that at least one flexible web (16) has a profiling (25) on one of the outer sides facing the first furniture part (2).

7. Connecting fitting according to one of the preceding claims, characterized in that the holding part (6) is designed as a bolt which engages in the shaped body (4, 4').

8. Connecting fitting according to one of the preceding claims, characterized in that the clamping element (5) is rotatably mounted on the shaped body (4, 4').

9. Connecting fitting according to one of the preceding claims, characterized in that the clamping element (5) has a curved guide and a head (12) of the holding part (6) rests on the curved guide.

10. Connecting fitting according to one of the preceding claims, characterized in that the shaped body (4, 4') and the impact part (10) consist of a pressed fiber material.

11. Connecting fitting according to one of the preceding claims, characterized in that step structures (26) are formed in the longitudinal direction on at least one side of the shaped body (4, 4') and / or the impact part (10).

12. Furniture (1) with a first furniture part (2) and a second furniture part (3) which are connected to one another via a connecting fitting according to one of the preceding claims.

13. Furniture according to claim 12, characterized in that the impact part (10) is arranged in the impacted position substantially flush with an end face of the first furniture part (2).

14. Furniture according to claim 12 or 13, characterized in that the furniture parts (2, 3) and the molded body (4, 4') are made of the same material.

15. Method for assembling a first furniture part (2) to a second furniture part (3) with the following steps: Partial insertion of a shaped body (4,4') with a movable clamping element (5) into a recess (8) on a first furniture part (2); - fixing a holding part (6) to the second furniture part (3); - Driving an impact part (10) formed integrally with the molded body (4, 4') into at least one receptacle (22) on the molded body (4, 4 £ ) by destroying a predetermined breaking point; - inserting the holding part (6) into the molded body (4) and the clamping element (5), and - Clamping the holding part (6) using the clamping element (5).

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