RU2466671C2 - Folding chair - Google Patents

Abstract

FIELD: personal use articles.

SUBSTANCE: folding chair with a frame on which the seat is mounted with the ability to rotate about an axis of folding between the reclined start position and the leant forward operating position. On the frame on its sides two flat brackets are fixed, each of which has an axial opening and an arcuate groove concentric to the axial opening. The axial pins presetting the axis of folding are at a distance of the seat, they are coaxial with each other and are mounted in the axial openings of the brackets, and thrust journals which are coaxial with each other and enter the congruent arcuate grooves. The seat mounted on frame comprises a metal frame interrupted from the front with two side parts facing each other and curved in the form of a stick, and axial pins and thrust journals are at a distance of them at the rear areas to the sides and outwards, and with a connecting part which connects both parts at the rear side.

EFFECT: increased comfort of placing the user on the chair and material saving.

10 cl, 7 dwg

Description

The invention relates to a folding chair with a frame, on which a seat is mounted with a possibility of rotation around the folding axis between the initial position and the front working position folded forward, and two flat brackets are fixed on the frame from the sides, each of which has an arcuate groove concentric to the axial hole, and from the seats are separated by axial pins forming the folding axis, which are coaxial with each other and installed in the axial holes of the brackets, and persistent trunnions, which are coaxial with each other and enter into the congrue nt arched grooves.

Such a folding chair is known from applicant publication DE 20107181 U1.

The basis of the invention is the task of improving the folding chair of the above kind in such a way as to reduce material costs and increase comfort.

This problem is solved according to the invention by the features of claim 1 of the formula due to the fact that the seat mounted on the frame contains a metal frame interrupted on the front side with two side parts facing each other, curved in the form of a cane, from which the sides in the back and outwardly spaced axial pins and thrust pins, and connecting both parts from the rear side of the connecting part.

Due to the fact that in the proposed folding chair the metal frame of the seat is interrupted from the front side, there is a corresponding material saving. At the same time, due to this embodiment, the weight of the seat in front of the folding axis is reduced, so that the seat in the unloaded state reliably and automatically rotates to its original position, tilted upwards, due to gravity. This means increased comfort. The same goal, i.e. due to gravity automatic folding of the seat in the unloaded state of the chair, it is that both side parts of the frame are made of tubular material, and the connecting part of the frame is made of solid material.

To comply with safety precautions, it is advisable if both side parts of the frame, preferably consisting of tubular material, are closed with plugs at their ends distant from each other.

From a technological point of view, it is preferable if the axial pin and the corresponding thrust pin that are separated from the corresponding lateral, bent in the form of a cane frame form an integral U-shaped element through the connecting section, which is fixed with its connecting section on the lower side of the corresponding side of the frame. Each U-shaped element preferably consists of a bar material. Fixation is carried out by welding, in particular laser.

In the proposed folding chair, the connecting part of the frame with its two ends spaced apart from each other is preferably fixed between the rear end portions of both side parts of the frame. Also in the case of this fixation we are talking about welding, mainly laser. Due to this embodiment, there is an additional advantage that the connecting part of the frame and the rear side portions of both side parts of the frame do not need to be made with beveled surfaces, and the connecting part needs to be made simply with end surfaces parallel to each other. This is preferable for technological reasons.

It turned out to be preferable that the connecting part of the frame is curved arcuate back and up. Moreover, its curvature of the backward bend is preferably greater than the upward curvature of the bend.

In the proposed folding chair, it is preferable if the frame comprises a collar-like tubular frame with two side racks and an upper connecting element, and if both side racks are interconnected at their lower end sections by means of a wall mounting bracket made with mounting holes. Thus made, the folding chair can be fixed by means of a wall mounting bracket, for example, on the end side of the stage of the stadium.

In order to be able to easily compensate for dimensional tolerances, which often cannot be completely avoided, it turned out to be preferable if said mounting holes are made in the form of grooves, preferably oriented in the transverse direction of the seat.

According to the invention, it is preferable if the wall mounting bracket has a flat middle part made with mounting holes and two end parts facing away from each other, which are integral with the middle part and form an obtuse angle, respectively, and their end edges are fixed on the uprights. Also in the case of this fixation, it is preferably a welded joint, preferably made by laser welding.

Other details, features, and advantages are set forth in the following description of an exemplary embodiment of a folding chair and its main parts without an image of the seat and back panels, as well as the upholstery.

The drawing shows:

- figure 1: the main elements of a folding chair in its folded initial position when viewed from the side;

- figure 2: the main elements of the folding chair of figure 1 in the forward-folded position;

- figure 3: view along arrow III of figure 2, i.e. front view of the main elements of a folding chair;

- figure 4: view along arrow IV of figure 2, i.e. from above;

- figure 5: top view of the metal frame of the seat of a folding chair;

- Fig.6: view of the metal frame in arrow VI of Fig.5;

- Fig.7: view of the metal frame in arrow VII of Fig.5.

Figures 1 and 2 show the design of a folding chair 10 and its main elements without seat and back panels, each of which can be equipped with upholstery.

Chair 10 contains a frame 12 and a seat 14. The latter is mounted with the possibility of rotation around the folding axis 16 between the upright initial position (see FIG. 1) and the forward working position (see FIG. 2).

Two flat brackets 18 are fixed on the frame 12 (see also FIGS. 3 and 4). This fixation is carried out by means of a welded joint, preferably by laser welding. Each of both brackets 18 has an axial hole 20 and an arcuate groove 22 concentric thereto. The axial holes 20 of the brackets 18 are aligned with each other. Both grooves 22 of the brackets 18 are congruent in the lateral projection.

From the seat 10 in opposite directions are spaced axial pins 24 coaxial with each other (see, in particular, figure 4 and 5). They are installed in the axial holes 20 of the brackets 18 and define the folding axis 16.

In addition, from the seat 14 in opposite directions there are spaced axial axles 26, which are included in the congruent arcuate grooves 22. The ends of the grooves 22, which are separated from each other, determine the working position of the seat 14, which is folded up and forward, relative to the frame 12 .

The seat 14 mounted on the frame 12 with the possibility of rotation includes a metal frame 28 interrupted on the front side (see, in particular, FIGS. 4 and 5), which is formed by two side parts 30 curved in the form of a cane and the connecting part 32 .

From both parts 30 of the frame, which together with the connecting part 32 form an open metal frame 28 open on the front side, axial pins 24 and thrust pins 26 are laterally and laterally separated in the rear sections 34. The connecting part 32 of the frame with its both ends separated from each other 36 is fixed between the rear end portions 38 of the side parts 30 of the frame, i.e. welded. The connecting part 32 of the frame consists of solid material, and both side parts 30 of the frame are made on the rear side with respect to the folding axis 16 defined by the axial pins 24 and are heavier than on the front side, so that the seat 14 in the unloaded state of the chair 10 automatically reclines upwards shown in figure 1, the initial position.

For safety reasons, i.e. to eliminate the risk of injury, both side parts 30 of the frame at their ends distant from each other are closed with plugs 40.

As can be seen in FIGS. 4 and 5, each axial pin 24 and the corresponding stop pin 26 are made integrally in the form of a U-shaped element 44. Each U-shaped element 44 with its connecting section 42 is fixed on the lower side 46 of the corresponding side part 30 of the frame (Fig.7). In the case of such a fixation, it is a welded joint, preferably a laser welded joint.

Figure 3-6 shows that the connecting part 32 is open on the front side of the metal frame 28 of the seat 14 arcuately curved back and up. The radius of curvature of the backward bend is less than the radius of the curvature of the upward bend, i.e. backward to the corresponding radius, the curvature of the backward bend is greater than the curvature of the upward bend.

As can be seen in figure 3, the frame 12 contains a collar-like tubular frame 48 with two side posts 50 and connecting them on the upper side as a whole by a connecting element 52. Both brackets 18 are spaced forward from the uprights 50 parallel to each other. Both racks 50 at their lower end sections 54 are interconnected by means of a wall mounting bracket 56. The latter has a flat middle part 58 and two end parts 60 facing each other. The middle part 58 is made with grooves 62 oriented in the transverse direction of the seat. The end parts 60 of the bracket 56 form an obtuse angle with the middle part 58, and their end edges 64 are fixed on the rear side at the lower end sections 54 of the struts 50, i.e. welded, in particular by laser welding.

Identical elements are denoted by the same reference numerals in the figures, so that it is unnecessarily detailed to describe all elements in combination with all the figures.

List of Reference Items

10 - folding chair

12 - frame

14 - seat

16 - folding axis

18 - flat brackets

20 - axial hole

22 - groove

24 - axial pin

26 - persistent pin

28 - metal frame

30 - cane-shaped frame parts

32 - connecting part of the frame

34 - back section

36 - ends

38 - rear end section

40 - plugs

42 - connecting section

44 - U-shaped element

46 - bottom side

48 - tubular frame in the form of a gate

50 - stand

52 - connecting element

54 - lower end section

56 - wall mounting bracket

58 - flat middle part

60 - end part

62 - grooves

64 - end edges

Claims (10)

1. A folding chair with a frame (12), on which a seat (14) is mounted between the original working position and the front working position pushed forward and pivoting around the folding axis (16), and two flat brackets (18) are fixed on the frame (12) from the sides ), each of which has an axial hole (20) and an arcuate groove (22) concentric to the axial hole (20), and axial pins (24), which are aligned with each other and installed in axial holes (20) of the brackets (18), and thrust pins (26), which are coaxial between them enter congruent arcuate grooves (22), characterized in that the seat (14) mounted on the frame (12) contains a metal frame interrupted on the front side (28) with two side parts curved in the form of a cane (30) ), from which axial pins (24) and thrust pins (26) are spaced apart in the rear sections (34) to the sides and outward, and to the connecting part (32) connecting both parts (30) from the rear side. 2. The chair according to claim 1, characterized in that both side parts (30) of the frame are made of tubular material, while the connecting part (32) of the frame is made of solid material. 3. The chair according to claim 1, characterized in that both side parts (30) of the frame at their ends distant from each other (36) are closed with plugs (40). 4. The chair according to claim 1, characterized in that the axial pin (24) and the corresponding stop pin (26) spaced from the corresponding side part (30) of the frame form, by means of the connecting section (42), an integral U-shaped element (44), which its connecting section (42) is fixed on the lower side (46) of the corresponding side part (30) of the frame. 5. The chair according to claim 1, characterized in that the connecting part (32) of the frame with its two ends (36) spaced apart from each other is fixed between the rear end portions (38) of both side parts (30) of the frame. 6. The chair according to claim 1, characterized in that the connecting part (32) of the frame is curved arcuate back and up. 7. The chair according to claim 6, characterized in that the curvature of the bend of the connecting part (32) of the frame back is greater than the curvature of the bend up. 8. The chair according to claim 1, characterized in that the frame (12) comprises a collar-like tubular frame (48) with two side posts (50) and an upper connecting element (52), while both side posts (50) are interconnected on their lower end sections (54) by means of a wall mounting bracket (56) made with mounting holes (62). 9. The chair according to claim 8, characterized in that the wall mounting bracket (56) has a flat middle part (58) made with mounting holes (62), and two end parts (60) facing each other, which form with the middle part (58), respectively, an obtuse angle, and their end edges (64) are fixed on the uprights (50). 10. The chair according to claim 8, characterized in that the mounting holes (62) are made in the form of grooves.

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