DE9420848U1 - Folding chair - Google Patents

Description

My file: E 52/1

Folding chair'

The invention relates to a folding chair, consisting of a seat, a backrest and two chair leg brackets forming a scissor frame, wherein the backrest is arranged on the upwardly extended, front chair leg bracket in line with the front chair leg bracket and the seat is articulated in its rear area to the front chair leg bracket and articulated in its front area to the rear chair leg bracket.

With the folding chairs known to date, even when folded up, there is still an angle between the seat and the plane formed by the front leg bracket and the backrest. If several of these chairs are stacked on top of each other, the entire stack quickly becomes unstable as the number of chairs increases. When stacking large numbers of chairs, it is not possible to make optimal use of the available storage space.

The object of the invention is to improve a folding chair of the type mentioned at the outset in such a way that the chair, with a simple and stable construction, requires a particularly small and, above all, flat space when folded up and can therefore be safely stacked on top of one another even in large numbers.

The object is achieved in that the front chair leg bracket and the backrest together consist of a U-shaped frame that is open at the foot end and a

upper part closed at the top, the backrest area integrated into the part of the frame forming the backrest and at least one cross brace connecting the U-legs in the lower area for stabilization, and the rear chair leg bracket consists of a U-shaped bent inner frame that is open at the top and when folded up, the seat area and the rear chair leg bracket lie completely within the flat space spanned by the outer frame. The low height of the folded chair enables it to be easily stacked. With a given storage area for the chairs, this space can be used much better and a larger number of chairs can be accommodated than with conventional folding chairs.

Further advantageous embodiments, which are useful for simple manufacture of the chair and serve to increase the stability of the chair or are conducive to safe stacking, are contained in the features of subclaims 2 to 10.

An embodiment is described below with reference to the accompanying drawings. They show:

Fig. 1 is a side view of the chair in use position, Fig. 2 is a front view of the chair in use position,

Fig. 3 a perspective of the chair in the folded state,

Fig. 4 an enlarged view of the adjustment mechanism,

Fig. 5 a perspective of several chairs stacked on top of each other,

Fig. 6 a more detailed view of the fixing pieces on the frame for chair stacking.

The folding chair (1) shown consists of a seat (3), a backrest (4) and two chair leg brackets (6, 7) forming a scissor frame. The front chair leg bracket (6) and the backrest (4) together consist of a U-shaped outer frame (2) that is open towards the foot side, as well as a backrest surface (5) integrated into the upper part of the frame (2) that is closed at the top and forms the backrest (4). The outer frame (2), the rear chair leg bracket (7) and the frame of the seat consist of U-profile material, preferably steel profiles. The open profile side of the frames or brackets are each arranged facing inwards. The outer frame (2) and the rear chair leg bracket (7) are connected to one another in an articulated and fixed manner. The upper ends of the rear chair leg bracket (7) are attached from the outside to the frame of the seat (3) in the front area of the seat (3) in an articulated and fixed manner.

The legs of the U-profile of the rear chair leg bracket (7) are folded inwards in an area around the connection point (9) with the seat (3). A guide pin (8) is arranged on both sides of the seat (3) in the rear area, which engages positively in the profile of the outer frame (2) and in this way connects the seat (3) and frame (2) to one another in an articulated manner and can be moved in the outer frame (2). When the chair is folded up, the connecting axis (8) between the seat (3) and outer frame (2) is moved towards the upper end of the backrest (4). The seat (3) and rear chair leg bracket (7) are thus completely sunk into the outer frame (2). When folding the chair (1), a cross brace (12) made of flat material or similar serves as a stop for the rear chair leg bracket (7), which rests on the frame (2) from the front and reaches around the outside of the frame (2) and is fastened there. As a stop for the seat (3) when folding up the chair (1) and as support for the seat

(3) During use, another cross brace (11) is arranged on the frame (2) in the middle area, which rests on the frame (2) from behind and reaches around the outside of the frame (2) and is fastened there. Both cross braces (11, 12) serve to stabilize the frame (2). The rear chair leg bracket (7) has two cross braces (13) to increase stability, which span the area enclosed by the bracket (7).

The seat (3) and backrest (5) consist of padded and fabric-covered panels which are fitted into the U-profile of the seat frame or the backrest

(4) forming the upper part of the frame (2) and are fixed there. The backrest surface (5) has a convex curvature (14) in its edge pointing to the foot end of the frame (2), which, when the chair (1) is folded up, is between the rear edge of the seat and

The lower edge of the backrest forms a recess for lifting the folded chair (1).

At the height of the backrest surface (5), fixing pieces (15) are attached to the sides of the frame, which have a pin (17) towards the back of the folded chair (1) and a corresponding hole (18) towards the front of the chair. In a favorable embodiment, these fixing pieces (15) are attached to the frame (2) with screws or the like, which simultaneously fix the backrest surface (5) in the frame (2).

At the foot ends of the outer frame (2) there are end caps (16), which are also designed as corresponding fixing pieces. When stacking the chairs (1,1') lying on top of each other, the pins (17) of the fixing pieces (15,16) of a chair (1) engage in the corresponding holes (18) of the fixing pieces (15,16) of the chair (1') below, so that the chairs (1,1') lying on top of each other can no longer slip against each other. The attached fixing elements (15,16) thus ensure particularly safe stacking. The low height of the collapsible chair (1) also enables high stackability; 20 chairs have a total height of approx. 80 cm when folded up and lying on top of each other.

It is advisable to store the stacked chairs on a suitably designed flat trolley so that even a large number of chairs can be transported from the storage location to the place of use quickly and with little effort.

Claims (10)

*•••·•#·•••••···•····• Protection claims 1. Folding chair, consisting of a seat, a backrest and two chair leg brackets forming a scissor frame, the backrest being arranged on the upwardly extended, front chair leg bracket in line with the front chair leg bracket and the seat being hinged in its rear area to the front chair leg bracket and in its front area to the upper end of the rear chair leg bracket, characterized in that the front chair leg bracket (6) and the backrest (4) together consist of a U-shaped frame (2) that is open towards the foot side and a backrest surface (5) integrated in the upper part of the frame (2) that is closed at the top and forms the backrest (4) and at least one cross brace (12, 11) that connects the U-legs to one another in the lower area for stabilization, and the rear chair leg bracket (7) consists of a U-shaped inner frame that is open at the top, and in the folded state the seat (3) and the rear chair leg bracket (7) lies completely within the flat space spanned by the outer frame (2). 2. Folding chair according to claim 1, characterized in that the articulated connections (9, 10) between the seat surface (3) and the rear chair leg bracket (7) and between the rear chair leg bracket (7) and the outer frame (2) forming the front chair leg bracket (6) and the backrest (4) are stationary, and the seat surface (3) and the outer frame (2) are articulated and slidably connected to one another in the frame (2) by means of guide bolts (8) fastened to the seat surface (3) and engaging in the frame (2). 3. Folding chair according to claim 1 or 2, characterized in that the outer frame (2), the rear chair leg bracket (7) and the frame of the seat surface (3) are made of U- or C-profile material, the open profile side of the frame or bracket being arranged facing inwards and the guide bolt (8) connecting the seat surface (3) to the outer frame (2) having a cross-sectional profile that engages positively in the corresponding frame profile and the rear chair leg bracket (7) is attached from the outside to the frame of the seat surface (3) and the legs of the U- or C-profile are folded inwards at the upper ends of the rear chair leg bracket (7) in an area around the connection point (9) with the seat surface (3). 4. Folding chair according to one of the preceding claims, characterized in that the outer frame (2) in the lower region of the front chair leg bracket (6) has a cross brace (12) made of flat material or the like which connects the U-legs of the frame (2) to one another, rests on the frame (2) from the front and reaches around the frame (2) on the outside and is fastened there, stabilizes the frame (2) and serves as a stop for the rear chair leg bracket (7) when the chair (1) is folded up. 5. Folding chair according to one of the preceding claims, characterized in that the outer frame (2) in the middle area a cross brace connecting the U-legs of the frame (2) to one another, resting on the frame (2) from behind and gripping the outside of the frame (2) and being fastened there, stabilizing the frame (2) and serving as a stop for the seat (3) in a horizontal position when the chair (1) is unfolded and supporting the seat (3) during use (11) made of flat material or the like. 6. Folding chair according to one of the preceding claims, characterized in that the rear chair leg bracket (7) has stability-increasing cross braces (13) which span the area enclosed by the chair leg bracket (7). 7. Folding chair according to one of the preceding claims, characterized in that the seat surface (3) and backrest surface (5) consist of padded and fabric-covered panels which are inserted into the U-profile or C-profile of the seat surface frame or the upper part of the frame (2) forming the backrest (4) and are fixed there. 8. Folding chair according to one of the preceding claims, characterized in that the backrest surface (5) has a concave curvature in its edge facing the foot end of the frame (2). (14) which, when the chair is folded, (1) between the rear edge of the seat and the lower edge of the backrest forms an opening for lifting the folded chair (1). 9. Folding chair according to one of the preceding claims, characterized in that fixing pieces (15, 16) are arranged on the outer frame (2) at various points for fixing the position of folded chairs (1, 1') lying one above the other, which have a pin (17) or the like in the direction of one side of the folded chair (1) and a corresponding hole (18) or the like in the other direction, whereby the pins (17) of the fixing pieces (15, 16) of a chair (1) engage in a form-fitting manner in the holes (18) of the fixing pieces (15, 16) of a chair (1) lying below or above it. 10. Folding chair according to one of the preceding claims, characterized in that the chair (1) has end caps (16) at the lower foot end of the outer frame (2), which serve as Fixing pieces are designed with corresponding pins (17) and holes (18) and on the upper part of the frame (2) at the height of the backrest surface (5) a further fixing piece (15) is attached to each side of the frame (2). •*■