RU196633U1 - FOLDING CHAIR - Google Patents

Abstract

The utility model relates to furniture, in particular to the design of a folding chair made of sheet material, which can be used in domestic and public buildings, as well as outdoors. The technical result consists in increasing the stiffness of the folding chair, which is ensured due to the fact that the folding chair contains a front (2), rear (1) and two side walls (3), as well as a seat (2a), formed during assembly of the chair from sheet material by bending the latter along the fold lines. The front, rear and two side walls, as well as the seat, are equipped with amplifiers to increase the stiffness of the chair, while the dimensions of its parts and the fold lines ensure its transformation into a folded position. A folding chair is performed by assembling and gluing it from sheet metal scans. 3 s.p. f-ly, 10 ill.

Description

The technical field to which the utility model relates.

This utility model relates to furniture, in particular, to the design of a folding chair made of sheet material, which can be used in domestic and public buildings, as well as in the open air.

State of the art

A technical solution is known in which a folding chair consists of a backrest and a folding seat. The backrest is made in the form of a truncated triangular pyramid. On the extensions of the side faces of the pyramid, arcuate elements with cutouts are made, which serve as handles for transferring the chair in assembled form. A continuation of the third face is a triangular lid with reeds on the sides. The tongues interact with the slots in the base of the handles and work as locks, fixing the position of the backrest in working condition. With the lid and handles raised, access to the internal volume of the back is opened (patent RU No. 95233, class A47C 4/00, publ. 06/27/2010).

The main disadvantage of this design is the lack of rigidity. As a rule, after the first use, disposal of the stool is required.

Known prefabricated chair containing the front, rear and two side walls, as well as the seat, formed when assembling the chair from a reamer in the form of a rectangular sheet by folding the latter along the folding lines, while on the scan from left to right, the folding side, front, the side and back walls of the chair, the height of the back wall is equal to the height of the rectangular sheet of the sweep, above the front wall there is a chair seat whose length is equal to the width of the side walls, and between the seat and the front A horizontal folding line is made by the female and two folding lines are made from the latter on adjacent side walls, the lateral edges of the rectangular sheet being interconnected to form the walls of the chair after folding the sweep along the folding lines of the box and forming a chair with a rectangular cross section by folding the side walls and seats along the folding lines (patent RU No. 45908, class А47С 4/02, publ. 10.06.2005).

This design does not have the required rigidity, and, despite the possibility of folding, is not suitable for repeated use.

The closest to the utility model in technical essence is a prefabricated chair containing a front, rear and two side walls, as well as a seat formed when assembling a chair from a scan in the form of a sheet by folding the latter along the folding lines, while on the scan from left to right sequentially marked with lines of folding, the lateral rectangular, the front along with the seat, the second lateral rectangular and rear walls of the chair. The length of the seat is equal to the width of the side walls, a horizontal fold line is made between the seat and the front wall located beneath it and two fold lines are made from the latter on adjacent side walls, one of which ends in the upper opposite corner of the side wall, and the other is a bisector of the angle bounded a fold line on the side wall and a fold between the seat and the side wall, the side edges of the sheet are interconnected to form the side walls of the chair and the side of the seat along the fold lines and, while the front wall together with the seat and the rear wall are made in the form of an isosceles trapezoid, and the smaller base of the trapezoid bounding the rear wall is located on the same side of the sheet sweep as the larger base of the trapezoid bounding the front wall of the chair (RU patent No. 54739 , CL A47C 4/03, published on July 27, 2006).

Despite the implementation of the front and rear walls of the chair in the form of a trapezoid, the specified chair does not have high rigidity, especially in the vertical direction.

The designs of chairs described above are not reliable due to their low rigidity.

Utility Model Disclosure

The technical problem being solved by the present utility model is to propose a reliable and reusable design of a folding chair made of sheet material such as corrugated cardboard, honeycomb polypropylene or the like. Also, the task is to provide ease in the process of folding and unfolding the chair.

To achieve a technical result, which consists in increasing the stiffness of a folding chair, the specified chair is made as follows.

A folding chair contains a front, rear and two side walls, as well as a seat, formed during assembly of a chair from sheet material by bending the latter along fold lines. The front, rear and two side walls, as well as the seat, are equipped with amplifiers to increase the stiffness of the chair, while the dimensions of its parts and the fold lines ensure its transformation into a folded position.

Preferably, the chair is made of four sweeps of sheet material by bending them along the fold lines, followed by gluing, the first of which is a sweep of the front with the seat, side and back walls of the chair and is made generally in the form of a rectangular sheet divided by five vertical fold lines equal parts for the formation of the rear wall adjacent to the side walls and two adjacent to the side walls of the front walls together with the seats, while the side walls contain bendable sections, from the side walls inclined fold lines running at an angle of 45 ° from the top of the fold lines located between the back wall and the side walls to horizontal fold lines running across the parts of the scan defining the front wall and the seat, along the fold lines made between the side the walls and parts of the sweep that define the front wall and the seat are made slots going from the upper edge of the sweep to the intersection of the inclined fold lines and horizontal fold lines, and the vertical walls are made on the side walls central bending lines dividing these walls into two equal parts, the second and third are reamers of the seat amplifier in a generally rectangular shape, each of which is divided by vertical bending lines into four equal rectangular parts, as well as gluing valves adjacent to the extreme parts, while along the center lines of the fold of the reamers of the seat amplifier, slots are made extending from the upper or lower edges of the reamer to their middle, the height and width of the reamers of the seat amplifier being selected taking into account the position of the seat amplifier under the seat of the folding chair, the fourth scan is a scan of the backrest amplifier, made in the form of a scan of a rectangular sheet of material, to the upper part of which there is a valve separated by a fold line, while the width of the backrest sweep is less than the width of the back wall by an amount corresponding to four times the thickness assembled, the backrest amplifier is glued to the back of the chair on the inside of the chair, and the backrest valve is glued to its exterior side, the front walls of the first sweep are glued to each other, the bent sections of the side walls are bent inward, pressed against the side walls and fixed in the indicated position by the backrest amplifier, the seats are bent inward and fixed in the horizontal position by the backrest amplifier, the seat amplifier sweeps are inserted into each other along the slots and bent along the fold lines so that the valves of one of the edges of these reamers were glued under the seat to the rear wall in its central zone, and the valves of the other edges were glued to eredney wall in its central zone.

The folding lines are made in the form of double parallel folding lines with a distance between them equal to twice the thickness of the sheet material.

Preferably, the folding chair is made of sheet corrugated cardboard or cellular polypropylene.

Folding chair is made as follows:

- perform a scan of the front wall with the seat, side and rear walls of the chair;

- perform two sweep amplifier seat;

- perform a scan amplifier back;

and carry out the assembly of the chair in the following sequence:

said sweeps are bent along fold lines;

- the backrest amplifier is glued to the back wall of the chair from the inside of the chair, while the backrest valve is glued to the outside of the back wall of the chair;

- add a scan of the front wall together with the seat, the side and back walls of the chair in the form of a box and glue its front walls;

- bend inwardly the bent sections of the side walls, press them to the side walls until they are fixed by the backrest amplifier;

- bend the seats inward and until they are locked in a horizontal position under the backrest amplifier,

- insert the reamers of the seat amplifier into each other along the slots and bend them along the fold lines so that the valves of one of the edges of these reamers are glued under the seat to the rear wall in its central zone, and the valves of the other edges are glued to the front wall in its central zone , and glue the valves to the indicated walls.

The above reamers are made by die-cutting in mass production or with the help of a vibro-knife in small-scale production.

Reamers may be coated with a protective coating.

Also, information, for example, of an advertising nature, can be applied to the scans.

The ratio of the dimensions of the reamers, the fold lines and their location provide a convenient transformation of the chair from the folded position to the unfolded and vice versa.

Thus, the design of the folding chair described above ensures the achievement of a technical result, which consists in increasing its rigidity due to the presence of reinforcing elements, features of their implementation and their relative position. The proposed folding chair withstands repeated use and is convenient in relation to its folding and unfolding.

Brief Description of the Drawings

The utility model is illustrated by drawings, in which:

FIG. 1 is a general view of a folding chair according to a utility model;

FIG. 2 is a schematic view of a sweep of the front wall together with the seats, side and rear walls of the chair with fold lines;

FIG. 3 is a schematic view of sweeps of a chair seat amplifier with fold lines;

FIG. 4 is a schematic view of a sweep of a chair back amplifier with a fold line;

FIG. 5 - FIG. 8 is a sequence of assembly of the front wall together with the seat, side and rear walls of the chair;

FIG. 9 is a bottom view of an unfolded chair with a seat reinforcement;

FIG. 10 is a bottom view of a folded chair with a seat reinforcement.

Utility Model Implementation

As shown in FIG. 1, the folding chair comprises a rear wall 1, a front wall 2, two side walls 3 and a seat 2a formed in the manufacture of a chair from a reamer made of sheet material. Corrugated cardboard, cellular polypropylene or similar material may serve as material for the manufacture of a folding chair. The optimal material is type P corrugated board (grade P31, P32, P33, P34, P35, P36, P37), it is also possible to use type T corrugated board (brands T21, T-22, T-23, T-24, T25, T26, T27 ) (GOST 7376-89 Corrugated cardboard. General specifications (as amended). For example, when using a P33 corrugated cardboard, the chair can withstand a load of 110 kg (chair seat size 40 × 40 cm).

A scan of the front, together with the seat, side and rear walls of the chair with fold lines is shown in FIG. 2. The specified scan is made, in General, in the form of a rectangular sheet divided by vertical fold lines into five equal parts to form the rear wall 1, adjacent side walls 3 and two adjacent to the side walls 3, front walls 2 together with seats 2a . To form bendable sections 3a of the side walls 3, on the reamer parts intended to form the side walls 3 of the folding chair, inclined fold lines 4 are made running at an angle of 45 ° from the top of the fold lines located between the rear wall 1 and side walls 3 to horizontal fold lines 5 extending across the parts of the scan defining the front wall 2 and the seat 2a of the folding chair. On the side walls 3 there are vertical center lines of the fold 6, dividing these walls into two equal parts. Along the bend lines made between the side walls 3 and the parts of the sweep defining the front wall 2 and the seat 2a, slots 7 are formed, extending from the upper edge of the sweep to the intersection of the bend lines 4 and 5. The dimensions of the sweep and its parts described above, the parameters of the bend lines and the slots are selected taking into account the overall dimensions of the folding chair and its subsequent assembly.

To increase stiffness, the folding chair is equipped with amplifiers 22 of the seat and back. The amplifier 22 of the seat is made of reamers (Fig. 3) of rectangular sheet material. Each of these reamers of the seat amplifier 22 is divided by vertical fold lines into four equal rectangular parts 11, 12, 13, 14 and 11a, 12a, 13a, 14a, as well as valves 15 adjacent to the lateral sides of the extreme parts 11, 14 and 11a, 14a The number of fold lines can be increased, taking into account the overall dimensions of the folding chair and its subsequent assembly. Along the central fold lines of the reamers of the seat amplifier 22, slots 16 and 17 can be formed, respectively, extending from the upper or lower edges of the reamer to its middle. The height of the sweep corresponds to the distance from the base of the folding chair to the seat. The width and height of the sweeps of the seat amplifier 22 is selected taking into account the location of the seat amplifier 22 under the seat of the folding chair and taking into account its folding.

The backrest amplifier of the folding chair is made in the form of a reamer 18 of sheet material (Fig. 4) of a rectangular shape, to the upper part of which there is a valve 19 separated by a fold line. The width of the backstop 18 sweep is less than the width of the back wall by an amount corresponding to four times the thickness of the sheet material. The height of the backrest amplifier is selected from the conditions for fixing the chair seat under the specified backrest amplifier.

The holes in the scan of the front, side and rear walls of the chair, as well as in the backrest amplifier, are designed for easy transportation of the chair.

In order to ensure convenient transformation of the folding chair into the folded position, the folding lines are made in the form of double parallel folding lines with a distance between them equal to twice the thickness of the sheet material.

The assembly of the chair from the scans described above is as follows.

The development of the front, side and rear walls of the chair is bent along the vertical fold lines into a closed loop (Fig. 3). Apply glue to the inner and / or outer surfaces, respectively, of the bonding zone of 8 parts of the scan corresponding to the front wall 2 of the folding chair and glue them.

Apply glue to the inner surface 9 of the rear wall 1, corresponding to the back of the folding chair, and on the surface 20 of the sweep 18 of the backrest amplifier. The backrest amplifier is glued to the inner surface of the back wall 1, the valve 19 is unbent and glued on the outside of the back wall 1. The backrest amplifier used in the design of the folding chair provides additional stiffness to the chair, and also serves as a structural element for fixing the folding sections 3a of the side walls 3 when folding the chair .

The folding sections 3a of the side walls 3 are folded inward until they are fixed in the gaps formed between the rear wall 1 and the backrest amplifier (Fig. 6). The presence of envelope sections 3A also increases both the stiffness of the side walls 3 and the stiffness of the chair as a whole.

Unbend the inside of the seat 3A along the horizontal fold lines 5 extending across the parts of the scan defining the front wall 2 and the seat 2a of the folding chair until they are fixed under the backrest.

In FIG. 8 shows a chair blank assembled from a reamer of the front wall together with the seat, the side and back walls of the chair, and also from the reamer 18 of the backrest amplifier.

The seat amplifier 22 is assembled from two reamers of the seat amplifier by inserting them into each other along the slots 16, 17. The seat amplifier 22 can also be assembled by gluing together the reamers of the seat amplifier along the area of the slots 16 and 17. The seat amplifier is formed along the fold lines, placed it under the seat, and the valves 15 of one of the sides of the reamers of the seat amplifier are glued to the rear wall 1 in its central zone 10 and the valves 15 of the other of the sides of the reamers of the seat amplifier to the front wall 2 in its central area 21.

The transformation of the chair from the unfolded to the folded position is as follows. The folding sections 3a of the side walls 3 are laid out, the seat is raised to a vertical position and the side walls 3 are bent inward along the central lines of the fold 6, as shown in FIG. 10. Lay out the chair in the reverse order.

Each of the technical results provided by the utility model is achieved by a combination of features of the utility model.

Claims (4)

1. A folding chair containing a front, rear and two side walls, as well as a seat formed when assembling a chair from sheet material by bending the latter along fold lines, characterized in that the front, rear and two side walls, as well as the seat, are equipped with amplifiers for increase the stiffness of the chair, while the dimensions of its parts and the fold line ensure its transformation into a folded position. 2. A folding chair according to claim 1, characterized in that it is made of four sweeps of sheet material by bending them along the fold lines with subsequent gluing, the first of which is a scan of the front side and side of the chair, the side and back walls of the chair and is made as a whole in the form of a rectangular sheet divided by vertical fold lines into five equal parts to form the rear wall (1), adjacent side walls (3) and two adjacent to the side walls (3), front walls (2) together with the seats (2a ), while the side walls the ki (3) contain bending sections (3a), separated from the side walls (3) by inclined fold lines (4) running at an angle of 45 ° from the top of the fold lines located between the back wall (1) and side walls (3), to horizontal bend lines (5) extending across the parts of the sweep defining the front wall (2) and the seat (2a), and along the bend lines made between the side walls (3) and the sweep parts defining the front wall (2) and the seat (2a) ), slots (7) are made, going from the upper edge of the sweep to the intersection of the inclined fold lines (4) and horizontal fold lines (5), and vertical central fold lines (6) are made on the side walls (3), dividing these walls into two equal parts, the second and third are reamers of the seat amplifier (22) of a generally rectangular shape, each of which divided by vertical fold lines into four equal rectangular parts (11, 12, 13, 14) and (11a, 12a, 13a, 14a), respectively, as well as into valves adjacent to the extreme parts (11, 14) and (11a, 14a) (15) for gluing, while along the center lines of the fold of the reamers of the seat amplifier, slots are made (1 6) and (17), respectively, extending from the upper or lower edges of the sweep to their middle, and the height and width of the sweeps of the seat amplifier is selected taking into account the location of the seat amplifier under the seat of the folding chair, the fourth scan is a scan of the back amplifier, made in the form of a scan ( 18) a rectangular sheet of material, to the upper part of which there is a valve (19) separated by a fold line, while the width of the sweep (18) of the back amplifier is less than the width of the back wall (1) by a factor of four the thickness of the sheet material, in the assembled form, the backrest amplifier (18) is glued to the back wall (1) of the chair from the inside of the chair, and the backrest amplifier valve (19) is glued to its outside, the front walls (2) of the first sweep are glued to each other, the bent sections (3a) of the side walls (3) are bent inward, pressed against the side walls (3) and fixed in the indicated position by the backrest amplifier (18), the seats (2a) are bent inward and fixed in the horizontal position by the backrest amplifier (18), the amplifier sweep (22) seats inserted into each other l slots (16, 17) and bent along the fold lines so that the valves (15) of one of the edges of these reamers were glued under the seat to the rear wall (1) in its central zone (10), and the valves (15) of the other edges were glued to the front wall (2) in its central zone (21). 3. A folding chair according to claim 1 or 2, characterized in that the folding lines are made in the form of double parallel folding lines with a distance between them equal to twice the thickness of the sheet material. 4. Folding chair according to any one of paragraphs. 1 to 3, characterized in that it is made of sheet corrugated cardboard or cellular polypropylene.

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