DE2437565A1 - FASTENING DEVICE FOR SHEET FOAM PARTS OR DGL - Google Patents

Description

15 073/4

Societl SPIIiBLOR ₁ IERDRUPT, France

Fastening device for molded foam parts or the like.

The invention relates to a fastening device with a fastening support for molding into a molded part made of polyurethane foam or a similar soft and / or specifically light, in particular synthetic mass its shape, to form an anchor point for rigid fasteners, with which the molded part against the frame, Racks, plates or supports, for example, also made of the same material, is set.

For fastening parts made of synthetic foam, for example polyurethane foam parts, to a support part such as an armrest, backrest or on furniture or accessories and the like. Are hard or rigid support parts or

509808/1025

local reinforcements required in the foam mass are embedded and on which a rigid connection can safely attack, which with another Part, accessories or the like, which optionally also consists of synthetic foam, is connected.

In the relevant industry, it has been customary to use this' unprocessed pieces of wood in which a Opening for receiving a rigid fastener is provided.

When these parts are supposed to have very low processing costs and are therefore reused parts how waste parts are handled, they do not have the quality properties required for their intended use.

In addition, these only cause parts that are roughly dimensionally accurate widely varying deviations in production.

When piercing to introduce a rigid lanyard like a screw, a nail or the like, it breaks Wood on top of that, so that the fastening means are only loosely seated and the wooden support part is unusable on the other hand cannot be exchanged because it is embedded in the foam.

The present invention is first particularly related

509808/1025

on the attachment of foam parts od. Like. To rigid Support members. In particular for furnishings, decorative objects, in automobiles or prefabricated ones However, there is often a need for two homes Foam molded parts with one another or a molded foam part to be attached to a support part made of soft plastic or the like.

The usual, placed before injection molding and integrated fasteners cut into the mass, so that the connection created with them often loose or completely becomes ineffective. .......

To avoid these disadvantages, the invention is based on the object of creating a fastening device, which is optimally integrated into the molded part and ensures a rigid connection, with the fastening device in the molded parts made of softer and / or. specifically lighter Mass are embedded and work together with an auxiliary support part can.

In a fastening device of the type indicated at the outset, this object is essentially achieved in that the fastening support has at least one connection. Reinforcing rib or a reinforcing ridge stiffened, as a plastic cast or press-molded part, in particular as an injection-molded part made of polyethylene, with a locking plate. _r

509808/1025

has grooved, grooved or roughly roughened by solid irradiation surfaces, with a mean Eye with a central channel for receiving counter-holding means for a safe one that can be introduced into the channel and rigid, but releasable connection is provided with an optionally similar retaining member ensuring fastening member.

In a particularly preferred embodiment, the fastening device according to the invention consists on the one hand a main support part of the type according to the invention and, on the other hand, an auxiliary support part of similar shape and texture with a central socket with locking means for the associated end of the fastening member.

About the inexpensive manufacturability. And the problem-free In addition to its applicability, a fastening device according to the invention has many advantages and possible uses.

Due to their shape, their projections, recesses and grooves on the surfaces of the locking plate is on All surfaces guarantee a secure adhesion in the foam and thus a good integration and position security inside the molded part.

The right . Position in the form when entering

509808/1025

spraying of the foam is secured by pins, which remain in the integrated part in the mass of the plate.

In addition, the design of the fastening device according to the invention ensures a firm and secure connection rush between two foams and the possibility of two flat parts, for example partitions, provisionally, but firmly and securely to be fixed against each other, as well as one good integration and securing of position inside a standard part made of synthetic foam.

Since the support part is neatly embedded in the mass, are the counter holding means inside the support part thanks to the middle eye with the canal for the introduction of the fastening organ always accessible.

Further details, features and advantages of the invention emerge from the following description of exemplary embodiments with reference to the drawing, in particular in connection with the further subclaims. It shows

Fig. 1 is a perspective view as a mounting bracket serving securing plate of a fastening device according to the invention;

FIG. 2 shows a section along line II-II from FIG. 1 with a additional representation of the counter holding device in Top view;

503808/1025

Pig. 3 in an exploded perspective view of another embodiment of an inventive Fastening device with main support part and support part;

Pig. 4 shows a further embodiment of a device according to the invention in an exploded, perspective illustration Fastening device with main support part and auxiliary support part.

A support part according to the invention can be made of any thermoformable or castable material, preferably but made of low-pressure polyethylene or nylon. The rectangular one provided in the context of the exemplary embodiments In the context of the present invention, Porm can be replaced by other geometrically regular or other porms will.

First, a simple form of a fastening device according to the invention with a simple fastening plate according to Pig. 1 and 2 explained in more detail.

According to this first embodiment of the invention, the support part forming the mounting bracket is rectangular Locking plate 1 formed, which is provided with at least 8 recesses or openings 2 in symmetrical layers are distributed over a large area of the plate surface. The breakthroughs 2 prevail

509808/1025

the entire thickness of the central body of the lock plate 1.

On its upper side, the securing plate 1, two upper reinforcing ribs, namely an axis extending in Iiängsrichtung reinforcing rib 3 and extending in the transverse direction reinforcing rib 4, ax in the vertical extension of the plane of the securing plate 1 protrude and together enclose a right angle so that the Divide the level of the locking plate 1 into four equal parts. Each upper reinforcement rib has vertical pins 5 and 6 at or near its ends, which improve the integration or adhesion of the support part in the foam.

The reinforcing ribs 3 and 4 are extended on the other side of the plane of the locking plate 1 in lower reinforcing ribs, which run as a reinforcing rib 7 in the longitudinal direction and as a reinforcing rib 8 in the transverse direction of the "" locking plate 1 and in terms of arrangement and design essentially the upper reinforcing ribs 3 and 4. The lower reinforcing ribs 7 and 8 are, however, of greater thickness in the present exemplary embodiment and the longitudinal reinforcing rib 7 protrudes over the transverse edges of the securing plate by at least 1 cm.

The surfaces of the locking plates 1 are irregular

509808/1025

moderately arranged grooves or grooves 9 or similar roughening provided, the grooves 9 crossing each other and approximately parallel to each other in two converging directions and thus ensure good adhesion of the foam to these flat surfaces. A corresponding Effect can be achieved by irradiating these surfaces with solids be achieved"

At the intersection of the reinforcement ribs 3 "and 4" or 7 and is provided over the entire height of the reinforcement ribs reaching imge 10, which is extended by an upper cylinder? Iseilen tubular Ai3.sa.ts 11 lsi *

In the ibage 10 a central channel 12 can be seen, which penetrates the locking plate 1 and which has a section formed by the threaded hole 13 of a metallic nut 14 OCE head eggs Mirfei-er 14, in particular the snsätzliche plan view illustration j in accordance with? ig _e 2, rectangular, in particular square aiisgeMldet and in the height of the main plane of the securing plate 1 is embedded in the material of the eye 10th

The nut 14 could be through a clamping member or through each be replaced in the mass of the locking plate 1 embedded component ^ which a holding force for a rigid Connection developed «

By means of the thread of the nut 14 a quick loading

509808/1025

consolidation of a rigid fastening element, "for example a threaded rod, possible which the through the foam part formed unit by means of the metallic nut 14 and the support part according to the invention against a frame, a rack, a plate-shaped! ragteil or. The like. This fastening option is also for a position of the support part in the form "used when injecting the foam.

By means of a closure part 15 such as a closure disc "be or a plug, the lower opening of the central eye 10 are closed to prevent penetration of the foam into the channel 12 during the injection to avoid.

In the embodiment of a fastening device according to the invention according to FIGS. 3 and 4, this is in several parts with one formed by a locking plate 16 Main support part and one by a locking plate 18 formed auxiliary support part formed. For improvement the securing plate 18 of the auxiliary support part is for clarity in Figs. 3 and 4 shown in thin lines. The main support part formed by the locking plate 16 carries a connecting or fastening member 17, which with one end in a central receiving part of the auxiliary support part forming securing plate 18 is insertable and fitted.

509808/1025

In the embodiment according to FIG. 3, the securing plate 18 which forms the main support part has a flat plate body 19 with a rectangular outline, the bottom 20 and top 21 to improve the adhesion in the foam grooved, grooved or, for example, by irradiating solids are roughened. A reinforcing rib 22 running in the longitudinal direction is provided on the upper side 21, which lies in the middle between the longitudinal sides of the plate body 19.

The plate body 19 has a centrally arranged, cylindrically shaped extension 23 which is perpendicular extends to the plane of the plate body 19 and is provided in its lower part with a coaxial recess 24, which opens out on the underside 20 of the plate body 19. The recess 24 settles upwards into a central one Channel 25 of smaller diameter continues, which opens into a circular opening 26 at the top of the extension 23. The channel 25 holds the connection or fastening element 17 perpendicular to the plane of the plate body 19.

The connecting or fastening element is in the present Embodiment as a metallic. Rod 27 is formed, which has an upper threaded part 28 and a lower, in has a conical end 30 tapering smooth guide part 29. On the smooth guide part 29 is a clamping part put on. The clamping part 31 ensures locking

509808/1025

and securing the position of the connecting or fastening element in the recess 24 when the rod 27 is in the intended position Location in approach 23 is introduced.

The as-preferably metallic plate formed part 31 has a substantially triangular body _s whose tips according or the generatrices of the recess broken, rounded sind.und so occur in the longitudinal direction thereof in close contact with the side walls of the recess 24 for securing the position of the rod 27 can.

The clamping part 31 has a central, approximately circular cutout with approximately the diameter of the rod corresponding diameter. In the present example case, they are distributed at regular intervals around the circumference of this section three retaining tongues 33 are provided with recesses in between. The retaining tongues 33 point to their inner ends corresponding to the contact circle on the outer circumference the rod 27 formed roundings, so that the inwardly extending retaining tongues 33 the body of the Clamp rod 27 or its guide part 29 between them.

The vertical position security is completed by a plug 34 with a cylindrical head 35, the upper End has a stepped, slightly reduced diameter. The plug 34 has a central cylindrical Recess 36 for receiving the end of the rod 27 on.

509808/102 5. BAD ORJQINAL

The cylindrical head 35 of the plug 34 is flat with a Base plate 37 connected, which forms a conclusion and at the same time serves as a gripping part.

In the assembled state, the head of the plug 34 is completely inserted into the recess 24 and pushes it Front part the clamping part 31 flat against the bottom of the recess 24, the head of the plug 34 has one opposite the diameter of the recess 24 slightly enlarged Diameter and is therefore held securely in the intended installation position by means of a press fit.

The auxiliary support part formed by the securing plate 18 has one of the securing plate 1 according to FIGS. 1 and 2 very similar training. In a plate body 38 of the Securing plate 18 recesses or openings 39 are also provided; on one side of the plate body 38 are also two reinforcement ribs 40 and 41, which in The longitudinal direction and the transverse direction each run in the middle of the plate, provided. The reinforcement ribs 40 and 41 are also provided with projections or pins 42 at their ends and intersect in the middle of the plate body 38. At the intersection of the stiffening ribs in the middle of the plate body 38 there is an eye or socket 43 provided, which has an insert part, in the present example a metallic nut 44, which with the surface of the associated end of the connection or

509808/1025

Fastening member 17 cooperates for locking.

In Fig. 4 is another embodiment of one according to the invention Fastening device shown.

This fastening device has a designated as a locking plate 16 main support part, which in all Details of the securing plate 1 according to FIGS. 1 and 2 correspond and are therefore provided with the same reference numbers and is no longer explained in more detail.

Similar to the exemplary embodiment according to FIG. 3, the connecting or fastening element 17 is formed by a metallic rod 45 which has a threaded part 46 and a smooth guide part 47. With the threaded part 46, the rod 45 is inserted into the channel 12 of the eye 10 of the locking plate 16 and screwed into the threaded bore 13 of the nut 14. The threaded part 46 extends approximately over half the height of the rod 45 and is inserted as far as the bottom of the channel 12 when it is screwed in, so that only the upper, smooth guide part 47 of the rod 45 protrudes. The smooth counter-holding or guide part 47 has fastening means for the securing plate 18 , which corresponds in structure to the securing plate 18 according to FIG. 3 and is therefore provided with corresponding reference numerals and does not need to be explained in more detail.

For fastening the securing device used as an auxiliary support

509808/1025

plate 18 on rod 45 has this on the smooth guide part 47 an annular notch 48 and a frustoconical tapered end 49 on. The end of the rod 45 formed in this way guides a lock in the interior of the extension or the socket 43 in the middle of the locking plate 18 ",

For this purpose, the socket or the extension 43 has an inner recess 50, the inner wall of which has the outline shape of the associated The end of the rod 45 is repeated in negative inversion. The recess 50 initially has a channel 51, an annular projection 53 »which is in the locking position engages in the annular notch 48 of the rod 45, and a receiving chamber 54 with a truncated cone shaped conditions upper bottom part 55, in which the associated end of the rod 45 comes to rest.

The dimensions of the recesses 50 are slightly smaller than those of the rod 45 chosen to ensure a secure interference fit.

The slight flexibility of the production of the auxiliary support part The materials used (polyethylene) ensure a strong, but nevertheless detachable and repeatedly re-producible Connection of the two parts.

The connecting or fastening member 17 and the znge-

509808/1025

Belonging counter-holding means can of course also be used in be designed other than the specific manner explained; in particular for the counter-holding means come depending on the formation of the connecting or fastening element also includes clamping parts, clamping parts or the like.

As the above explanations show, the invention is not restricted to the exemplary embodiments shown.

50S808 / 1025

Claims (15)

Patent (protection) claims 1. \ A fastening device with a mounting bracket for <y indentation in a molding of polyurethane foam or similar soft and / or low specific gravity, insbesonderen synthetic composition before its formation, to form an anchoring point for rigid fastening means with which the molded part against frame, frames, Plates or supports, for example also made of the same material, is fixed, characterized in that the fastening support is a plastic cast or plastic reinforced with at least one reinforcing rib (3 »4, 7, 8; 22; 40, 41) or a reinforcing bar. Press-molded part, in particular as an injection-molded part made of polyethylene, has a locking plate (1; 16, 18) with grooved, grooved surfaces or surfaces roughened by solid irradiation, which have a central eye (10; 23; 43) with a central channel (12; 25; 51) for receiving counter-holding means (nut 14; nut 44; projection 53) for an insertable into the channel, a si chere and rigid, but releasable connection is provided with an optionally similar retaining member ensuring fastening member (17). 2. Fastening device according to claim 1, characterized in that that on at least one of the sides of the locking plate (1; 16; 18) at least two perpendicular to each other upright reinforcement ribs (3, 4; 7, 8; 40, 41) are provided, which extend in the longitudinal or transverse direction of the panels. 509808/1025 f
■ · I t are directed and cross each other in the middle of the plate. 3. Fastening device according to .Anspruch 1 or 2, thereby characterized that preferably on "both sides of the Locking plate (1; 16) reinforcing ribs (3 »4» 7, 8) are provided and that at least one of the plates in the longitudinal direction extending reinforcing ribs (7; 40) have a length projecting beyond the length of the locking plate (1; 16; 18) having. . . *. 4. Fastening device according to one of claims 1 to 3, characterized in that the reinforcing ribs (3, 4; 40, 41) in particular on the top of the locking plate (1; 16; 18) in the region of their ends preferably have cylindrical projections such as pins (6) which are perpendicular to the level of the locking plate (1; 16; 18) extend. 5. Fastening device according to one of claims 1 Ms 4, characterized in that the counter-holding means for the " in the channel (12; 25; 51) introduced connection "or" Fastening member (17) as suitable internals with fastening elements, for example clamping elements are formed. 6. Fastening device according to one of claims 1 to 5 »characterized in that the counter holding means by an insert such as a nut (14; 44) made of metal 509808/1025 are preferably formed with a square cross-section that is at the level of the plane of the locking plate (1; 16; 18) in the eye (10; 43) is let in and its threaded bore (13) is aligned with the central channel (12) of the eye (10). 7. Fastening device according to one of claims 1 "to 6, characterized in that the plate body (38) of the
Securing plate (1; 16; 18) has recesses or openings (2; 39) which are preferably arranged regularly distributed in an amount of two over the width and four over the length of the securing plate (1; 16; 18). 8. Fastening device according to one of claims 1 to 7, characterized in that the lower opening of the channel (12; 51) of the eye (10; 43) by a closure part (15)
like a sealing disk or a sealing plug is closed to prevent penetration during the injection molding process
Avoid foam in the channel (12; 51). 9. Fastening device for a rigid connection of two parts made of foam or the like, in particular according to at least one of claims 1 to 8, characterized in that
on the one hand a securing plate (16) stiffened by reinforcing ribs (3, 4, 7, 8; 22) forms a main support part with a central cylindrical extension (11; 23) as a carrier for a rigid connecting or fastening element (17) and on the other hand a in terms of form and training 509808/1025 similar securing plate (18) forms an auxiliary support part ", which is centered an eye or a socket (43) with counter-holding means for the associated end of the "Yerbindungs-" or fastening element (17). 10. Fastening device according to claim 9, characterized in that the securing plate "forming the main support part" (16). a rectangular plate body (19) eggit one has roughened or grooved underside (20) and upper side (21), which has a centrally extending reinforcement rib (22) and in its center a cylindrical, perpendicular to the plane of the plate body (19) extending Approach (23) has which in its lower part has a coaxial cylindrical recess (24) which is in the The middle of the underside (20) of the plate body (19) opens and becomes smaller towards the top in a central channel (25) Diameter continues. 11. Fastening device according to claim 9 or 10, characterized in that the connecting or fastening member (17) as a rod (27) made of metal with an upper threaded part (28) for engaging the part forming the auxiliary support part Securing plate (18) and formed with a lower smooth guide or holding part (29) with a conical end (30) is, which has a clamping part (31) for fixing the connecting or fastening member (17) in the recess (24) is provided when the rod (27) is inserted into the projection (23). 509808/1025 12. Fastening device according to one of claims 9 Ms 11, characterized in that the clamping part (31) is designed as a plate and is preferably made of metal, as well has a substantially triangular body, the corner points of which correspond to the shape of the inner wall of the recess (24) are rounded, and that the clamping part has a central, substantially circular cutout with a approximately that of the rod (27) corresponding diameter, which at regular intervals at least three Has holding tongues (33) with notches in between, the holding tongues (33) extending towards the center of the clamping part (31) extend towards and at their inner ends according to the circular line of contact with the rod (27) are rounded in such a way that the body of the rod (27) is firmly clamped between the holding tongues (33). 13. Fastening device according to one of claims 9 to 12, characterized in that the serving as the main support part Locking plate (16) has a plug (34), the cylindrical head (35) of which into the recess (24) of the locking plate (16) is insertable and a central cylindrical recess (36) for receiving the adjacent end of the Has rod (27) and a base plate (37) for the completion and for the formation of a gripping part. 14. Fastening device according to claim 9 or 10, characterized in that the connecting or fastening element 509808/1025 ment (17) as a rod (45) made of metal with a lower Threaded part (46) and a cylindrical, smooth upper Guide "or holding part (47) is formed, wherein on the Holding part (47) preferably designed as a ring-shaped notch (48) fastening means in the region of its End and a frustoconical flattened end (49) are provided are. 15. Fastening device according to claim 14 »characterized in that that the backup plate forming the auxiliary support part (18) has in its center an eye or a socket (43) with an essentially cylindrical recess (50) which consists of a channel (51), an annular gate (53) for introduction into the annular notch (48) of the rod (45) and a receiving chamber (54) for the end (49) the rod (45) with a frustoconical bottom part (55) consists. 509808/1025 Blank page