RU13603U1 - CHAIR - Google Patents

Abstract

A chair, the frame of which is made of metal tubular elements, including legs pairwise fastened by the cross members, a seat support and a back from the horizontal arc lintels of the rear legs of the rear legs, characterized in that the side legs are counter-inclined at the top and a support for the rear legs is rigidly attached seats, combined with front legs inclined to the center, mounted on a comparable width of the back.

Description

CHAIR.

The utility model relates to furniture for seating, in particular to chairs, the frame of which is made from metal tubular elements by welding.

Practical and comfortable chairs with a tubular metal frame, the legs of which are attached to the seat support and the rear legs are combined with the uprights of the backrest made of a series of horizontal arc jumpers (see utility models according to certificates Ш 9689 and 11457, RF patent, are widely used nowadays) for the invention 2124857, all for 1999 according to class A47C5 / 04).

The side legs are pairwise connected by arched crossbars, which strengthen the structure and provide stability to the frame. The crossbars are made of a pipe with a diameter equal to the support pipe under the seat, which unifies production and simplifies the technology of bending frame elements.

The backrests are tilted back to an angle of 20 °, which creates convenience for a comfortable rest on these chairs.

Among the known analogues, the chair according to the patent of the Russian Federation No. 2124856, A47C5 / 04 dated 01.20.99, the frame of which is made of metal tubular elements, including legs pairwise fastened by the cross members, a seat support and a backrest made of mountain, is selected as the closest in terms of coinciding features and technical nature. zonal arc lintels, N back legs deflected back.

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counter-curved arched jumpers of the side legs, perceiving alternating compression-tensile deformations under uneven loading of the seat and back of the chair, providing dynamic balance when the legs are strained, which causes damage to the welded joints of the cross-members with legs.

In addition, additional elements of hardening of the frame increase the mass of the chair, which increases the intensity and load of the consumer in operation.

The task, which the real utility model is aimed at, is to eliminate the noted drawbacks, while preserving the advantages.

The required technical result is achieved by the fact that in a known chair, the frame of which is made of metal tubular elements, including legs pairwise fastened by the cross members, a seat support and a back from horizontal arc i. the lintels of the back legs of the rear legs ±, as suggested by the author, the side legs are counter-inclined at the top, and the seat support is firmly attached to the cross of the rear legs, combined with the front legs inclined to the center, mounted at a comparable back width.

The proposed embodiment of the known structural structural elements of the frame and their new interconnection ensured the alignment of the seat support with the front legs, which is closed by the cross of the rear legs, which eliminated the arched cross-members of the side legs and part of the seat support.

The backrest struts combined with the rear legs, connected by a cross-beam and arc jumpers parallel to it, form a rectangular lattice that does not deform and does not change shape

we are under dynamic uneven loading during operation. In the rigidly fixed horizontal rods of the arc lintels and cross-members working on bending, only longitudinal (tensile or compressive) forces arise, causing horizontal reactions (str) 4 in the places of their jamming on the back and rear legs, which are perceived as a tense steady state.

The cross of the rear legs is structurally part of the frame with a support for the seat, which is combined with the front legs, with each being made at the same time. In this case, a spatial beadless farm is formed in which the dynamic loads of a movably sitting person are damped, which ensures stability to the chair.

The execution of the side legs opposite the top and the front legs located at the width of the back, to the center of the guarantee ensures the location of the center of mass in the area of the support of the legs of the chair, increasing its stability.

In addition, the stability of the knock is served by performing its carcass in the form of structurally connected flat frames forming a truss: a rectangular frame from the uprights of the back with the rear legs and three trapezoidal frames from counter-inclined legs, bearing the base on a smaller base and supported by a large base, where the forming tubular rods of the structure work on bending, and are rigidly connected to each other,

Distinctive features, in conjunction with the known ones, make it possible by simple means to solve the utilitarian task of increasing the stability and bearing stiffness of the chair frame with its expressive, avant-garde spatial form of stylish design.

is sufficient to achieve the novelty of quality, a new supereffect of the amount inherent in the signs of their disunity.

The essence of the utility model is illustrated in the drawing, where the images are:

in FIG. 1 is a photo of the chair in FIG. 2 is a frame, side view, in FIG. 3 is the same, view along arrow A in FIG. 2, in FIG. 4 is a view along arrow B in FIG.

The chair frame is made of steel pipe elements with a diameter of 22 mm with a wall thickness of 1.5 mm, which are welded together in a jig. The front legs 1 are aligned with the arc support 2 of the seat frame 3 (Fig.) Which are made of separate blanks at the same time in a tube bending machine. Supports 2 are welded to the buttress 4 of the rear legs 5, which are combined with the posts 6, tilted back at an angle of 20 °. To the uprights 6, horizontal arched lintels 7 are welded with an arc to the outside, forming the back of the chair.

The supports 2 are structurally designed as a supporting element for the seat 3 by means of a rigid connection with the cross member 8 of the front legs 2 and the cross member 4 of the rear legs 5.

Crossbars 4 and 8 combining the functions of the structural elements of the support for the seat 3 and the flat frames of the frameless frame truss as a whole.

The front and rear legs 1 and 5, respectively, in the lateral planes of the chair are tilted at an angle of 10 ° above to form trapezoidal flat frames of the frame truss, while the front legs 1 are additionally inclined to the center (Fig. 4), forming together with the cross member 8 the front frame of the frame farm.

 5 combined with the rear legs 5, to which the supporting cross member 4 is welded, located at a width comparable to the width of the support of the front legs 1, together form a rectangular lattice of the frame truss.

The proposed shape of the frame determines the spatial position of the seat 3 in the area of the support legs 1 and 5, guaranteed to be located beyond its dimensions, which ensures the stability of the chair by definition.

Parallel jumpers 7 racks 6 increase the rigidity of the back, while performing the functions of leaf springs operating in the mode of mutual compensation of elastic deformations in arcs, that is, balance the design of the frame under asymmetric load.

The inclined back allows a seated person to tilt the body back to the stop on the jumpers 7 for temporary relaxation, without getting up from a chair in which the bone skeleton and back muscles are unloaded.

The free space under legs 3 and legs 5 under the seat 3 allows you to conveniently position the legs of the person sitting on the chair without encountering obstacles, which is also convenient for cleaning floors and coatings under the chair without rearranging it, as instruments and tools move unlimitedly in the volume of the frame under the seat 3.

The seat 3 open on three sides allows the seated person to sit sideways on the chair, resting his forearm and elbow on the upper lintel 7 of the backrest, which expands its functionality, while the legs are freely placed noj seat 3.

ingestion in a conductor by a semi-automatic apparatus in a shielding gas medium. Welds clean flush. The frame is treated with etching, and then enamel sequentially in several layers.

The bottom seat 3 is screwed to the supports 2 (Fig. 1, 4).

The structural elements of the frame and their stable relationship are self-sufficient, not requiring additional elastic fillers, upholstery and decorative materials, creating a structural and artistic unity of the chair, stylish design, light, sophisticated shape, durable and sustainable.

Simplification of the frame structure, compared with the prototype, increased rigidity reduces the total mass of the chair, which is the reduction in the diameter of the tubular elements of a thin-walled pipe, possible as a result of increasing the rigidity of the spatial frame.

The proposed design of furniture is universal and technological, it serves both for work and leisure, at home and in the office, which expands the scope of use of the chair. The frame is unified by component tubular elements, which determines its consumer demand at a relatively low cost.

The utility model is not known according to the results of comparison with the identified analogues of the prior art, which clearly does not follow for a furniture maker, and can be industrially reproduced in an existing production, that is, meets the criteria of patentability.

Claims (1)

A chair, the frame of which is made of metal tubular elements, including legs pairwise fastened by the cross members, a seat support and a back from the horizontal arc lintels of the rear legs of the rear legs, characterized in that the side legs are counter-inclined at the top and a support for the rear legs is rigidly attached seats, combined with front legs inclined to the center, mounted on a comparable width of the back.