SK501032015U1 - Demountable joint with automatic tension function - Google Patents

Abstract

Demountable joint with automatic tension function consists of a retaining mandrel (1) with a retaining head (2) and a spring clip (3), consisting of the lateral wings (5), connected to a rear part (4) of the spring clip (3) and the locking wings (6 ) with the ends (6a). These by the pressure on the walls of the retaining head (2) because of the elasticized lateral wings (5) hang the lock the retaining mandrel (1), whichever is the shortest joint spacing of the locking wings (6) is always less than the widest dimension of the retaining head (2). The locking wings (6) may have the form of circular, elliptical or a combination of shapes, and it is preferred that the locking wings (6) are bent inwardly clamping the lateral wings (5) the angle a 5 ø to 90 ø and the locking wings (6) in the form V having the angle P of 5 ø to 160 ø and the angle P ' 5 ø to 160ø. The retaining head (2) can have the shape of a cone, the cone-hemisphere, a sphere, or a combination thereof.

Description

Detachable connection with automatic tightening function

Technical field

The technical solution concerns a detachable connection of segments of various units and assemblies, especially furniture, with an automatic tightening function.

Prior art

In technical practice, various methods of connection are used to connect segments into certain units and assemblies. The most common joints that can also be disassembled are joints using screws and nuts, shaped profiles and connectors, pins and magnets. In the furniture industry, a detachable connection by means of a holding pin and an eccentric is very often used. The disadvantage of these connections is the fact that in the storage of individual segments into units or complete assemblies, in most cases the presence of an additional assistant or the need for an assembly aid is necessary.

Pin joints mentioned in SK 2616 U, GB 2195001 A and in DE 10 2006 012 897 A1 are characterized by fast assembly of individual elements, but these joints are intended only for a very narrow range of practical use and require complicated and time consuming production of individual joints in parts.

Furniture connections resp. joints for predominantly wooden parts are disclosed in SK 5170 Y1 and in DE 102008 054 055 A1. In both cases, it is a joint held by a steel mandrel with a wider upper part than the lower body, which is firmly held in one of the parts. The second part has a recess formed so that a wider part of the mandrel fits into it, and by inserting it into a narrower recess in the part, both parts are locked. The advantage is the fast disassembly of the joint, the disadvantage is its limited use and demanding production of joint parts.

Joints in slide-in and modular shelving systems are described in DE 202004 008 102 U1, in DE 20 2008 011 638 U1 and in DE 197 01 280 A1. These are assemblies formed mainly by metal struts in combination with metal beams. As joints, holes are placed in the struts for attaching the beams, which are fastened with screws and nuts, metal fittings or plug-in elements. Their advantage is considerable spatial stability. The disadvantage is that they are composed of metal columns and beams, the production of which by bending, shaping and welding is complicated and costly. Also, their assembly is time consuming and requires a lot of fastening material. Many are created in such constructions

-2paces in which dust and other impurities settle. These spaces are very difficult to access for cleaning and maintenance.

EP 00 0000 451 012 A1 discloses a similar shelf system which is connected by a finished frame structure into which the individual shelves are inserted by means of shaped clamps. The whole system is variable and detachable. The disadvantage is that the production of components is even more complex and expensive than in previous solutions.

The shelf systems described in DE 20 2007 010 269 U1, in DE 20 2010 002 382 U1 and in DE 196 24 941 A1 are made of side vertical walls and horizontal shelves. The shelves are connected to the side walls using metal profiles, pins and impact profiles. Their advantage is relatively fast assembly. The disadvantage is that the location of the individual shelves is precisely determined by the construction system and their position cannot be changed after assembly.

The solution provided by EP 0 862 876 A1 has shelves inserted into grooves in vertical columns. The shelves are shaped in the grooves so that they do not come loose and are secured with a shaped profile. This system is combined with a U-shaped metal profile, which is held in the recess of the strut. The disadvantage of this system is that it can only be used on a shelf system with shelves attached to only one and the same edge, e.g. shelves hanging on the wall.

A modular, variable shelf system is disclosed in DE 20 2007 013 817 U1 and in DE 20 2008 012 761 U1. Both solutions use the possibility of variability of the shelf system, the connection of which in the vertical direction is ensured by inserting spacers between the individual levels of the shelves. Subsequently, the whole assembly is stabilized by a system of rods guided in holes through individual shelves and spacers. In the second case, the spacers are connected to each other by pins fitting into holes in their body. The advantage is the variability of different shelf positions in the shelving system. The disadvantage is the number of components (spacers), which unnecessarily complicate the whole assembly and its assembly. In addition, such interior systems are quite cumbersome in the interior.

EP 2682614 A1 describes the connection of parts, where grooves are formed, into which notched elements are inserted, the connecting elements of which fit together in their shape. The disadvantage is that the individual elements must be very precisely and tightly fitted into the parts in order to achieve

-3tight and stable connection. As this is an impact method of insertion into recesses where a friction force acts, a serious problem can also occur with the strength and rigidity of this joint.

GB 1 314 894 A discloses a corner connection of two elements in the form of a tongue and groove by means of a metal clip. After inserting the elements into each other, the whole joint is held only by frictional force, which by use over time can lead to a gradual release of the whole joint.

The joint in WO 2012/095454 A1 is a plug-in assembly joint of individual furniture panels by means of a male connector, which is inserted into a female connector housed on opposite sides of a recess in the panels.

The disadvantage of this connection is that it is necessary to precisely manufacture, fit and fasten the female connectors and other components in which this connector mounting connection holds in the recesses in the individual elements of the assembly. The plug-in "click" system created in this way, with its flexibility in the joint, is not used in the spatial constructions of furniture, but rather suitable for joining tiles and floors.

The plug-in connection in JP S48 28843 U consists of profile connecting elements which are inserted into one another in parallel in precisely defined profiles.

Such a method of joining has very limited possibilities of use, especially in the production of furniture.

FR 2 793 667 A1 defines a joint of vertical walls which has several horizontal grooves into which the shelves are inserted, the joint being centered and locked in predetermined recesses or inserted profiles after the individual parts have been inserted. The disadvantage is the complicated production of individual parts and profiles of the joint and at the same time their demanding placement in the assembly. It deals only with the anchoring of the fastening elements and does not address the stability and rigidity of the assembly.

EP 2906836 A1 is a self-locking connection which ensures a firm connection of the parts by cutting the square ends of the flexible fitting of one part into the opposite walls of the recess of the other part. The disadvantage is that the joint thus formed is either non-disassemblable or can only be disassembled in a certain direction, gradually, according to the method of assembly.

-4The essence of the technical solution

The main goal of the presented technical solution is to create a detachable joint to connect two or more segments into one unit. The essence of such a connection is an assembly with an automatic tightening function, which consists of a catch mandrel with a catch head and a spring clip. The spring clip consists of side wings connected, preferably at right angles, to the rear part of the spring clip and of locking wings with ends. Depending on the method of use, these locking wings can have a straight, circular, elliptical shape or in various combinations of these shapes. The locking wings of the spring clip bent inwards may be bent at an angle and in the range of 5 ° to 90 °, if they are V-shaped, they may have an angle β in the range of 5 ° to 160 ° and an angle β 'in the range of 5 ° to 160 °. The retaining mandrel can have a catch head in the shape of a cone, a sphere, a hemisphere or a combination of a cone with a hemisphere, two cones or another suitable shape, the shortest distance between the locking wings always being smaller than the widest dimension of the catch head. The spring clip fitted in the recess of the joined segment is firmly attached to the rear wall of this recess by a fastening element.

The free locking wings open when inserted into the catch head of the mandrel, their ends move away from each other, and thus spring the side wings of the spring clip. After overcoming the point of the widest part of the catch head, the locking wings of the spring clip try to return to the original (equilibrium) state by the pressure-sprung side wings, whereby their ends automatically slide along the walls of the catch head and thus bring the leading edges of both segments close together. The flexible connection thus formed allows the manipulation of both connected segments with the others, without the connection disconnecting spontaneously.

For better centering of the joint, pins can be fitted in one connected segment, which, when connected, are inserted into corresponding recesses in the other connected segment.

To stabilize and immobilize this joint, fixing pins can be used, which are inserted into the locking wings perpendicularly or horizontally to the direction of insertion of the retaining mandrel into the spring clip. If a circular lamella (blanking plug) is used, such a solution can also serve not only to stabilize (fix) the joint, but also to release the fixed connection by turning the circular lamella in one or the other direction.

In segments made of porous or composite materials, where there would be a problem with the firm attachment of the retaining mandrel and the spring clip, clamps may be used.

-5 different shapes that are attached to the material segment with either screws or adhesives. Their material, shape and function must ensure a firm grip of the spring clip and the retaining mandrel in the clip and at the same time a tight and firm connection in the segments. Fixing pins are used to stabilize and immobilize the joint in the manner already mentioned. These fixing pins can also be part of the clip body. For a better centering of the two parts, it is advantageous if a protrusion is formed on the clip of the first segment, in which a retaining mandrel is fixed and there is a corresponding recess in the clip of the second segment.

The detachable connection allows fast and flexible connection of segments in all materials available on the market. Easy assembly of the segments by fixing the joint, as well as simple disassembly are understandable and understandable for every end consumer, regardless of their technical education and skill. The automatic tightening function of the joint also allows the customer to assemble even demanding assemblies without assembly aids and without outside help.

Overview of figures in the drawings

The detachable joint according to the presented technical solution and its variants are shown in the accompanying drawings.

In FIG. 1 shows a catch mandrel with a spring clip.

In FIG. 2, the retaining mandrel and spring clip are shown in axonometry.

FIG. 3 shows different shapes of the locking wings of the spring clip.

In FIG. 4 is a retaining mandrel and a spring clip which are fitted in the individual segments. FIG. 5, FIG. 6 and FIG. 7 show the insertion of the segments into each other. Details "A", "B" and "C" show different examples of the ends of the locking wings of the spring clip.

FIG. 8 and FIG. 9 show the mounting of the locking wings in the shape of the letter "V".

In FIG. 10 are some possibilities of the shapes of the catch head.

FIG. 11 shows the immobilization and stabilization of the joint by means of fixing pins which are inserted vertically into the locking wings.

In FIG. 12 the connection is stabilized by means of fixing pins which slide horizontally into the locking wings.

FIG. 13 shows the stabilization of the locking wings bent inwards.

In FIG. 14 shows the possibility of stabilizing the joint by means of a circular lamella with fixing pins.

-6Fig. 15 and FIG. 16 show the release of the joint by turning the circular lamella with the fixing pins.

FIG. 17 is a three-dimensional illustration of an example of the connection of two segments by means of clips fitted with a catch mandrel and a spring clip.

In FIG. 18 is a cross-section of a joint formed by clamps held in individual segments. In FIG. 19 is an example of the connection of two segments in which a retaining mandrel and a spring clip are fitted.

Examples of technical solution

Example 1

The detachable connection, with an automatic tightening function, consists of a retaining mandrel 1 with a retaining head 2 and a spring clip 3 (Fig. 1). This spring clip consists of side wings 5 connected at right angles to the rear part 4 of the spring clip 3 and locking wings 6 which are bent inwards at an angle of 45 °, the distance D1 between the ends 6a of the locking wings 6 being less than the thickness D retaining mandrel 1.

The detachable connection of the first segment 9 and the second segment 11 (Fig. 4) has a retaining mandrel 1 with a retaining head 2, firmly connected to the first segment 9. In the recess 13 for the spring clip 3, the spring clip 3 is firmly attached via the opening 7 for the fastening element 8. its rear part 4 to the lower part of the recess 13 for the spring clip 3. When inserting the spring clip 3 mounted in the segment 11 into the retaining mandrel 1 held in the first segment 9 (Fig. 5), the locking wings 6 with ends 6a are acted upon by the widest part 14 of the retaining pin. heads 2, move away from each other and thus spring to the sides of the side wings 5 of the spring clip 3. After overcoming the widest part 14 of the catch head 2 (Fig. 6), the ends 6a of the locking wings 6 slide back along the walls of the catch head 2. By this automatic movement, the leading edge 10 of the first segment 9 and the leading edge 12 of the second segment 11 are tightly connected to each other, as can be seen in FIG. 7.

Example 2

Bolted to the function of self-tighten connecting the first segment and the second segment 9 H, J ^much identical to the joint of Example 1 except that the locking wings 6 are in the shape of the letter "W" (FIG. 8, FIG. 9).

-7 Example 3

A detachable connection with the catch head 2 of the catch mandrel 1, which can also have the shape of a cone 2a, a combination of a cone-hemisphere 2b, a ball 2c or a cone-cone 2d (Fig. 10).

Example 4

The detachable joint with the automatic tightening function can be stabilized and immobilized in a vertical manner (Fig. 11) or in a horizontal manner (Fig. 12) by means of a fixing element 15 comprising fixing pins 15a.

Example 5

The detachable joint with the automatic tightening function (Fig. 14) is fixed (immobilized) by means of a circular lamella 16 with fixing pins 15a. fitted in the recess 13 for the spring clip 3 (Fig. 14). Disassembly is performed by turning the circular lamella 16, the fixing pins 15a of which open (open) the side wings 5 of the spring clip 3 (Fig. 15). This releases the catch head 2 from the grip of the locking wings 6 and the first segment 9 and the second segment 11 can be separated from each other (Fig. 16).

Example 6

The detachable connection with an automatic tightening function connecting the first segments 9 and the second segment 11 (Fig. 17) has a catch mandrel 1 with a catch head 2, fixed in the oval protrusion 20 of the clip 17 of the first oval segment 9 or in a circular clip 19. which are held in the corresponding recess 22 of the first segment 9 and 22a, respectively. The spring clip 3 of this connection is fastened through the opening 7 for the fastening element 8 in the recess 21 of the clip 18 of the segment H, which is held in the corresponding recess 23 of the segment Π .. The clip 17 of the first segment 9, the clip 18 of the second segment H. and the clip 19 of circular shape are fixed in the first segment 9 and the second segment 11 by means of screws through the holes 17a of the clip 17 and 18a of the clip 18.

Example 7

The detachable joint with automatic tightening function connecting the first segment 9 and the second segment H is identical as in Example 1, except that pins 24 are fitted in the first segment 9 to center the joint, which are inserted into the corresponding recesses 25 in the second segment. segment 11, in the segments a catch mandrel and a spring clip are fitted (Fig. 19).

-8Industrial applicability

The use of the connection with automatic tightening is especially in those market sectors where fast, stable and convenient connection of segments with each other is required. It is mainly in the furniture industry, construction and engineering industry. It can be suitably used, for example, in various products of catering companies and favors the distribution of products in the form of e-shops and delivery services. This means significant savings everywhere where saving assembly and disassembly time, transport and storage. At the same time, it provides considerable user comfort for the consumer and, thanks to the minimum number of connecting elements, it is environmentally friendly with its technical solution.

Claims (10)

CLAIMS FOR PROTECTION Detachable connection with an automatic tightening function, characterized in that it consists of a retaining mandrel (1) with a retaining head (2) and a spring clip (3) formed by side wings (5) connected to the rear part (4) of the spring clip (3) and locking wings (6) with ends (6a), for locking the retaining mandrel (1), by pressing on the walls of the retaining head (2) as a result of the sprung side wings (5), the shortest mutual distance of the locking wings (6) is always shorter as is the widest dimension of the catch head (2). Detachable joint according to claim 1, characterized in that the rear part (4) of the spring clip (3) comprises an opening (7) for a fastening element (8). Detachable joint according to claims 1 and 2, characterized in that the locking wings (6) have a circular, elliptical shape or a combination of these shapes. Detachable joint according to claims 1 and 2, characterized in that the locking wings (6) bent inwards form an angle α of 5 ° to 90 ° with the side wings (5). Detachable joint according to claims 1 and 2, characterized in that the V-shaped locking wings (6) have an angle β 5 ° to 160 ° and an angle β '5 ° to 160 °. Detachable joint according to one of Claims 1 to 5, characterized in that the catch head (2) has the shape of a cone (2a), a cone-hemisphere (2b), a sphere (2c) or a combination thereof. Detachable joint according to one of Claims 1 to 6, characterized in that the joint is stabilized and immobilized by a fixing element (15) with fixing pins (15a). Detachable joint according to Claim 7, characterized in that the fixing element (15) is a circular lamella (16). Detachable connection according to one of Claims 1 to 8, characterized in that the retaining mandrel (1) is mounted in the clip (17) of the first segment (9) and the spring clip (3) is mounted in the clip (18) of the second segment ( 11), which are fixed in a corresponding recess (22) of the first segment (9) and a recess (23) of the second segment (11). Detachable joint according to Claim 9, characterized in that there is an oval projection (20) on the clip (17) of the first segment (9) and a corresponding recess (21) in the clip (18) in the clip (18) of the second segment (11).