DE1960434U - RIGHT ANGLE SCREW CONNECTION FOR FURNITURE PARTS. - Google Patents

Description

Right-angled screw connection for furniture parts

The firing concerns a right-angled screw connection for furniture parts made of wood or wood and metal, in which one part lies on the end grain of the other part. This designation is not to be understood as restrictive. It is only intended to say that the part on which the other rests, is essentially at right angles from the other part, extends. Such connections are coming primarily for seating. Because the individual parts. from Seating furniture for essentially aesthetic reasons none have large material thicknesses, it is difficult to

cliend to establish solid connections that can withstand the great stresses and strains ^ withstand, T Furthermore, it is desirable for the frames of Sit.zmöbein · .-.> ;. Constructions use too that are partly made of metal and partly made of wood ". It is well known that it is extremely difficult to between these two materials - simple but firm connections to manufacture. A further promotion of such connections is that they are as inconspicuous or concealable as possible meant to be. ■. -. "■ ■

According to the innovation, there is a right-angled screw connection for Furniture parts made of wood or wood: and metal, with one part lying on the end-grain surface of the other part, marked through a screw hole, through the part on top of the part below Part, and a blind hole that crosses the screw hole in the part below, for a metal or plastic insert Thread in-one through the screw hole inserted screw must be tightened. Preferably a Allen screw is used, and the head of the screw will be recessed .. The screw head can be countersunk with a metal or plastic insert. For connections where the contact surface of the two parts to be connected is narrow but extends long, are parallel to the screw connection one or more pin connections between the two Divide, arranged. -.

The innovation is explained below using exemplary embodiments explained in more detail with reference to the drawings. In the drawings show :. .

_ 3 -

Fig. 1 Section through the two parts of a right-angled connection made of ^ wood! ? -, ._ ^:? - "

Fig. 1a section according to UIg. 1 with a different arrangement and training-the items?

FIG. 2 shows a section along the line II - "II of FIG. 1;

Fig. 3 a. Section through the two at right angles to each other connected parts, one of which is made of wood and one made of Made of metal; -...-.-.- "-..-". "-_ ■"

FIG. 4 shows a section along the line IV-IV in FIG. 3; FIG.

Pig. 5 one. Section through the right-angled connection of two Parts where, in addition to the screw connection, a . Pin connection is present; -

Pig. 6 shows a section along the line VI - VI in FIG. 5.

According to Figures 1 and --2 ~ , two wooden parts are connected to each other at right angles. In this embodiment, it is a part of a Sirtzmöbels, namely the connection, a .Stuhlbeines 1 with a _: frame frame 2. The chair leg 1 lies on the. End grain side 3 of frame frame 2. A screw hole 4 is drilled into the lame frame 2 through the chair leg 1, so this screw hole 4 runs parallel to the wood fibers of the frame. 2..Oas screw hole is also arranged in such a way that there is the same distance from: the two outer longitudinal

4 -

areas of the frame frame 2.- In the. Frame frame. 2 a blind hole 5 is drilled in from below, since the screw hole 4 crosses at its end. An insert 6 made of metal or plastic is used in this screw cap 5. The insert is provided with an internal thread 7 which is arranged in such a way that when the insert is inserted, it is in the extension of the visual hole 4. To assemble the two parts 1 and 2, a metal screw 8 is inserted from the outside - into the screw hole in part 1 - and screwed through the continuing screw hole into the internal thread 7 in the insert 6. By tightening the screw 8 die.beiden. Parts 1 and 2 firmly connected to each other. A screw with a hexagon socket 9 , the head of which is countersunk in part 1, is preferably used as screw. Around. To increase the strength of the connection, a recessed insert can be made in part 1; Io aas Metall oder- Eunsts.tof f are provided, which surrounds the head of the screw-8 and the support, as well as the beginning of the screw hole 4 forms * - -.

In Fig. 1a_is essentially the same type of connection shown..Jeöoch is the shaft 8 of the screw of one Metal screw jacks which are screwed into the wood of part 1 is and inside, provided with-a smooth passage IO is. --'- ::. Such. Screw socket side ^ di ^ e-also. for example

called insert nut, are the timber industry are used in various occasions, when used for compounds machine screws - you ha'b ^{0 '1} on the outer surface a wide wood thread, which ensures einen.besonders good fit even in the softer wood.. The bore is either smooth or machine-threaded. The in the connection according to Fig. La

■ '"■■' ■ -". '. · ■ "■' . - 5 -

inserted metal bushing begins at the bottom of the blind for the screw head and ends on the outer surface of the part 1j it is not only used for better guidance, the. Screw, but also prevents the screw from being too large. Tightening compresses the wood of part 1, since the screw is inserted across the fiber alignment. When the two parts 1 and 2 are connected, the metal bushing sits on the end face - and thus on the end grain of part 2, which is much stronger. The metal part 6 with a threaded hole 7 inserted into the bore 5 of the part 2 is designed in the embodiment of FIG. As a result, the bearing surface of the part 6 is enlarged in the bore, and it is avoided that foreign bodies or. Impurities can settle in the bore 5. Behind the part 6 , the hole for the screw 8 is still lengthened, so that there is no risk of their tip being driven into the wood of the part 2 when these metal screws are tightened firmly.

In the embodiment of Figures 3 and 4 is the Connection of the same parts as provided in: Figures 1 and 2, however, here is the chair leg. 11 from a metal profile while the frame 12 is made of wood. The metal chair leg 11 lies against the end grain surface "13 -. the wooden frame 12. Here again is a screw hole 14 guided through the chair leg 11 from the outside drilled into the wood of the frame 12 and. on the outside of the chair leg profile 11 expanded to accommodate the head of the screw 18. In one of

'■ "■" "" - below

A blind hole 15 drilled into the frame 12 is an insert 16 Made of plastic or metal, inserted into its internal thread. 17 the screw ^ 18 "for the 'fixed' connection of the two parts Tl and 12 is screwed in. The internal ohms 19 can as well as in the previously described Ausfülirungsbeispiel covered by a plug so that it is as inconspicuous as possible.

In the exemplary embodiment according to FIGS. 5 and 6, the connection of the rear spar with the backrest of a piece of seating furniture is shown. The spar 20 is made of metal, but in this exemplary embodiment it can also be made of polyamide. The backrest 21 is made of wood. The backrest has a relatively narrow but long support surface 22 on the wood 2o. The spar 2o can end at the surface 23, but it can also be extended, if further backrest parts are to be arranged. A screw hole 24 is Drilled from the outside of the spar 20 into the backrest 21 from the support surface, in such a way that it is equidistant from the two long outer surfaces of the backrest arranged in the backrest in such a way that its central axis crosses the central axis of the screw hole 24. An insert a Us plastic or metal used in such a way _: that it is flush with the surface of the backrest 21 on both sides. In this insert 26, an internal thread 27 is mounted transversely into which one

Screw 28 is screwed in, the -from the outside through the Schrauhlooh 2Φ from the spar 2o into the screw hole 24 in the backrest 21 is introduced. Here, too, the head of the screw 28 be arranged in the spar 2ο again an insert made of metal or plastic can serve as a guide and support for the screw head. With the screw 28 is a fixed connection between the spar 2ο and the Backrest 21 made; however, it cannot be prevented that with the arrangement only one screw the backrest 21 can be rotated relative to the spar 2ο. -. For this reason, the Backrest 21 in blind holes. 29 pins 3o attached, which protrude from the narrow side of the backrest and in corresponding Holes '31 are introduced into the spar 2o before the Screw connection is established. Through these pins 3ο between the backrest 21 and dec ?? Holm 2o is a substantial one Increasing the strength of the connection between the two parts is achieved, and it is prevented that when only one is arranged Screw connection the; Backrest 2.1 can twist in relation to the spar 2o ..: .'.-.-: ■. "■ .'..- - -

Claims (5)

.P.A. 026 998 * 16.1.67 P r ο f e s ο r D r. - I η g. ROBERTMELDAU 483 GÜTERSLOH / W., Den, .... D i η I I η α Carl-Bertelsmann-Str. 4 GUSTAV * MELDAU ■ τ .. * η «ο« 4 ,,. »« · Patent attorneys 4o9 gM / my claims for protection 1.) Right-angled screw connection for furniture parts made of wood or wood and metal, in which one part lies on the end-grain surface of the other part, marked by a screw hole / \. _} through the overlying / part 1 in the underlying part 2, and a Sacklooh 5 that. the screw hole 4 in the underlying part 2 crosses for a plastic or metal insert with thread 7, in which a screw 8 inserted through the screw hole 4 is to be tightened. 2.) Right-angled screw connection according to claim!, Characterized in, that a hexagon socket screw 8 is used. 3.) Right-angled screw connection according to claim 1 and 2, characterized characterized in that the head of the screw 8 is countersunk. 4.) Right-angled screw connection according to claim 1-3, characterized in that the screw head with a metal or Plastic insert 1o is sunk. . 5.) Right-angled screw connection according to one of the preceding Claims, characterized in that, parallel to the screw 28, one or more Steek pin connections 3o between the two Parts are arranged. Bank details: Deutsche Bank A.-G., Gütersloh / Westf. Account no. 2280 / Postsdiadtkonto Dortmund No. 21717