DE1017757B - Articulated fitting for a seat that can be converted into a bed - Google Patents

Description

The invention relates to an articulated fitting for a piece of furniture that can be converted into a bed, such as z. B. od a sofa. Like. Through which the seat cushion and the backrest both under and with are articulated to the base frame by means of three levers attached to each side to swivel the folding backrest into the horizontal position in the plane of the seat.

The three hingedly connected to each other on both sides of the piece of furniture Levers are hinged at one end along an approximately horizontal line on the base frame. That the other end of the first, front lever is at the rear end of the seat, that of the second, middle one and the third, rear lever are in the vicinity of the backrest edge facing the seat Distance from each other articulated on the backrest, the first lever with its articulation point on Sit at a larger angle than the second lever with its pivot point on the backrest when converting in a bed describes. The first and second levers are with one another between their hinge points tied together.

The particular feature that characterizes the invention is that the first is connected to the lever Lever longer than the second lever and this again is longer than the third lever, whereby the articulation point of the first lever on the seat in the upper corner of the edge facing the backrest Seat is, while the hinge points of the second and third lever on the backrest in approximately the same distance from the seat adjacent to the seat and under the seat base when the furniture is in the seated position lying face of the backrest and only slightly below the horizontal plane of the articulation point of the first lever 5 are arranged on the seat and the articulation point of the handlebar 9 on the first Lever 5 in the lower half of this lever and the articulation point of the handlebar 9 on the second lever 6 in the upper half of the latter is provided and when converting the chair into a bed, the first Lever pivoted with its articulation point on the seat by a larger acute angle α than the second lever will.

In a particularly advantageous embodiment of the hinge fitting, all three levers are both in Sitting position as well as in bed position of the furniture inclined to the vertical by an angle that is less than 60 °.

As a result of the described design of the furniture fitting the backrest can be so high that it can be used as seating by approximately the amount the enlargement of the distance mentioned when converting the furniture into a bed Articulated fitting for a piece of furniture that can be transformed into a bed

Applicant: Andre Voland, Zurich (Switzerland)

Representative: Dipl.-Ing. R. Müller-Börner, Berlin-Dahlem, and Dipl.-Ing. H. H. Wey, Munich 23, Parzivalstr. 8th,

Patent attorneys

Claimed priority: Switzerland of April 14, 1953

Andre Voland, Zurich (Switzerland), has been named as the inventor

Lever joint points protrudes under the seat of the seat part, while they are used as a bed when the furniture is used is flush with the seat in a horizontal position. The seating furniture, ζ. Β. a sofa, can be converted into a bed, the lying surface of which is wider than that available for seating standing seat and backrest.

The exclusively straight, easy-to-manufacture levers and handlebars without slotted brackets or guide bolts and the like. Existing fittings have proven to be particularly useful and enable transforming the furniture in a few simple steps.

An embodiment of the hinge fitting for convertible seating furniture according to the invention is shown in FIG shown in the accompanying drawing; it shows Fig. 1 the seating furniture in vertical cross section,

Fig. 2 shows a part of the furniture transformed into a bed in vertical cross section along the Line II-II in Fig. 3 and

FIG. 3 shows a plan view of the furniture according to FIG. 2.

The convertible piece of furniture has a base frame 1, a seat 2 consisting of a frame and a cushion and a backrest 3 also formed from a frame and cushion of bedding can serve. The seat 2 and the backrest 3 are connected both to themselves and to the base frame 1 by means of articulated lever fittings attached to the side. Each of these fittings has three levers 5, 6 and 7. These

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three levers are hinged at their lower ends to a horizontal rail 8 which is screwed tightly to the inside of the side wall of the base frame 1. The upper end of the lever 5 is articulated in the vicinity of the seat surface on the end of the seat 2 facing the backrest 3. The lever 6 is pivoted at its upper end to the backrest 3 in the vicinity of the outer surface thereof and at a distance \ ^r on its lower end side, while the lever 7 is pivoted at its upper end also connected to the backrest 3, namely horizontally in approximately Distance from the hinge point of the lever 6 near the rear of the backrest 3. Between their two hinge points, the levers 5 and 6 are connected to one another by a link 9, in such a way that the link 9 engages the lower half of the lever 6.

When using the furniture as seating furniture (Fig. 1), the three levers 5, 6 and 7 are approximately parallel to each other. As can be seen, the seat 2 and the backrest 3 are in this position against automatic displacement or pivoting secured, since each weight acting on the seat surface the levers 5, 6 and 7 seeks to pivot clockwise (Fig. 1). In addition to the corresponding levers, the seat is located on z. B. resilient rollers 10 and the backrest 3 at the upper, beveled edge of the Back wall of the base frame 1 supported. An anchored to the rail 8 spring 11, which with her the other end is attached to the lever 5, seeks the entire lever device in that shown in FIG Able to hold.

If the seating furniture is now to be converted into a bed, the seat 2 is pulled forward in the direction of the arrow α (FIG. 1). The lever 5 is pivoted counterclockwise by the angle α. The lever 6 is inevitably pivoted by the angle β in the same direction of rotation until all the levers assume the end position shown in FIG. As can be seen, the pivoting of the levers 6 and 7 results in the backrest being folded over into its horizontal position. Since the angle α is greater than the angle β, the horizontal distance between the two upper hinge points of the levers 5 and 6 is greater when the furniture is converted into a bed (FIG. 2) than when it is used as seating furniture. The space thus gained is, as shown in FIG. 2, filled by the end part of the backrest 2 protruding beyond the upper hinge point of the lever 7, so that the lying surface of the furniture converted into a bed is larger than the seating and available seating furniture Backrest area. This makes it possible to produce a bed of sufficient width from the seating furniture having normal dimensions. As FIG. 2 shows, the seat and backrest are also stable in the position shown in FIG. 2, since a load on the bed tries to pivot the lever counterclockwise. An undesired straightening of the backrest 3 is avoided.

When it is converted back into seating furniture, the seat 2 is pushed back again. As a result of the linkage connection with lever 6, the lever 5, which is pivoted back, initially causes the lever 6 to pivot back more rapidly, so that space is created for the backrest 3 that is now inevitably to be opened. The spring 5 supports this. _;: . Reconversion of the furniture. V

The lever devices described have an extremely simple structure and have a few, easily manufactured individual parts whose space requirements are low. ■■■■ Since these devices are also self-locking in their two end positions, no special locking mechanisms are required, as is "none in;" Guides running pegs or the like that easily * ^{;, to:} tend to jam.,

Claims (2)

Patent claims: Verwati- 1. A hinge fitting for a into a bed: delbares seating furniture with a seat and fold-down in horizontal position backrest, by means of which the seat and backrest as well as arrival laterally both among themselves with a base frame by means of ^three: matched lever are hinged, the one end are articulated along an approximately horizontal line on the base frame and of which the other end is the first lever at the rear end of the seat, the second and third lever near the edge of the backrest facing the seat with ΐ; Distance from one another are articulated on the backrest, the first lever with its articulation point on the seat at a greater angle than the second lever with its articulation point on the = ^; Describes the backrest when converting into a bed, while a handlebar connects the first and ■■>. ■ the second lever between their joint positions, characterized by,; that the first, connected to the seat lever (5) longer than the second lever (6) and the latter ,, is longer than the third lever (7), wherein the ^presence: steering position of the first lever on the seat in which the: The upper edge corner j of the seat (2) facing the backrest (3) lies, while the hinge points ä of the second and third levers (6, 7) on the backrest (3) are at approximately the same distance from the seat adjacent to the seat and in the seat area of the furniture ■■■ lying under the underside of the seat; The end face of the backrest and just below the horizontal plane of the articulation point of the first lever (5) are arranged on the seat as well as the articulation point of the handlebar (9) on the first lever (5) in the lower half of this lever and the articulation point of the handlebar (9) on the second lever (6) ^{h is provided} in the upper half of the latter and when converting the chair into a bed, the first lever with its articulation point on the seat is pivoted through a larger acute angle (α) than the second lever. 2. Hinge fitting according to claim 1, characterized in that all three levers (5, 6, 7) both enclose an angle with the vertical in the sitting position as well as in the bed position of the furniture, which is smaller than 60 °. Documents considered: German Patent No. 831 009; British Patent No. 626,414; U.S. Patent Nos. 2,264,090, 2,209,880. 1 sheet of drawings © 709756/202 10.57