DE1924514U - CONNECTING DEVICE OF THE CENTRAL SUPPORT OF A CHAIR WITH THE FOOT SUPPORT TUBES. - Google Patents

Description

EA. 371750 * 23.6.65

my reference: 0122 Gm

Company Drabert _sons:
Minden / Westf., Wilhelmstrasse, 13/17

Connection of the central support of a chair with the foot support tubes.

The hiring relates to a connection of the center support of a chair with approximately horizontally and radially extending foot support tubes, both the center support and the foot support tubes being made of heat-resistant material. -. ...

The well-known version that; Welding the center support to the foot support tubes is indicated by a number of disadvantages; for example, the subsequent grinding out of the weld seams is necessary. It must be provided for good roundings and transitions so that

with flawless for chrome plating as well as for paint spraying Areas are available.

Furthermore, it is no longer new to connect the foot support tubes to the center support of a chair with a ring, which is welded to the center support or pressed onto it or is shrunk. This type of connection also has a number of disadvantages. An essential one The disadvantage lies in the comparatively high production costs of the ring, especially in the case of profiles other than round profiles due to the large number of machining operations required are.

This is where the innovation kicks in. It is based on the task to create a connection of this type, which, however, differs advantageously from the known arrangements According to the innovation, the connection surrounds the facing ends of the central support and the foot support tubes, these Connection consists of a shrinkable material that is liquid before cooling. This creates a solid connection created, which is comparatively cheap; Rework is completely unnecessary.

In a further embodiment of the innovation, the ends of the foot support tubes facing one another are deformed. purpose this precaution is to achieve increased torsional strength.

- 3 -

The connection according to the innovation is explained in more detail below with reference to the drawing. In this show in a purely schematic way:

Pig. 1 is a side view of a one-column chair with backrest and the almost horizontally arranged support tubes, soft with the central support; through. the connection are united according to the firing,

Fig. 2 shows a vertical step through the connection according to the innovation, /

Pig. 3 shows a section along the line ΙΙΓ-ΙΙΙ in Pig. 2,: ■ / -. ■

Pig. 4 a vertical section through a further embodiment of the connection according to the innovation,

Pig. 5 shows a section along the line Y-Y in Pig. 4th

With 1 (Pig. 1) the butt support tubes of the chair are designated, which run approximately horizontally and radially outwards. The Pussstützrohre 1 are with the central support 2 of the chair connected via a connecting piece 3.

The connection of the support tubes 1 with the central support 2 takes place according to the method according to the invention in FIG Way that the Pußstützrohre 1 to the central support 2 in the

~ 4

the finished connection corresponding layer brought close will. Subsequently, the joint, which of the mutually facing ends of the foot support tubes 1 and the central support 2 is formed into a mold 4, e.g. a mold, introduced, which is filled with a liquid, shrinkable material (Mg. 2 and 3). Tray solidification or hardening of the liquid material creates a correspondingly shaped connecting piece 3, wherein as a result of with the solidification that goes hand in hand with the shrinking process An intimate, homogeneous connection is created between the foot support tubes 1 and the central support 2 of the chair.

Another feature of the innovation is that they are each other facing ends of the Fußstutzröhre 1 in any way deformed (Pig. 4 and 5). This is intended to increase the resistance to torsion can be achieved. The deformation of the ends of the foot support tubes 1 can, for example, in the case of a round profile, by flat printing respectively.

Another possible embodiment is that the foot support tubes are also tacked or welded to the central support can be in order to obtain a good fixation for the casting mold. Subsequent treatment of the weld seams is no longer necessary here.

The material introduced into the casting mold 4 can consist of any, shrinkable and durable metals, for example

_ C

Order from aluminum alloys or from plastic.

The foot support tubes 1 can be shaped as desired and also have any conceivable profile. For example, the foot support tubes 1 can have a round, oval, square or rectangular cross section; a tapering of the Jhiß support tubes 1 to the outside is possible. The casting mold 4 must also be prepared in accordance with these shapes.

Another advantage of the innovation is that the foot tubes 1 must be finished before being placed in the casting mold 4 and the surface must also be treated, e.g. chrome-plated be able.

- Protection claims -

iiiififi "ATIii -" · -

Claims (2)

* ι RA.32ί 750 * 23.6.65 protection claims 1. Connection of the central support of a chair with the approximately horizontally and radially extending iußstützrohren, where both the center support and the flow support tubes are made of heat-resistant material, because they are characterized by the fact that the connection is one another facing ends of the Mittelstütge (2) - and the foot support tubes (1) and consists of a shrinkable material that is liquid before cooling. 2. A compound according to claim 1, d aid ure h characterized in that the facing. Ends of Foot support tubes (1) are deformed. /