Seating furniture with a marginal interface zone dedicated to attached units

Abstract

Seating furniture with an interface edge zone for attachment units The invention relates to a seating furniture comprising a right side and a left side respectively located at a distance from a vertical longitudinal median plane of said seating furniture, knowing that a coupling structural group, intended to receive a plug-in part of an attachment unit, is located on each of the aforementioned sides of said seating furniture, knowing that the individual coupling structural group has at least one receiving recess oriented at least approximately in the transverse direction with respect to said vertical longitudinal median plane, and knowing that all the receiving recesses of an individual coupling structural group are oriented parallel to each other and have, associatively, a cross-sectional area differing from a circular surface; a row of seating furniture comprising at least two seating furniture;as well as a chair system consisting of at least one seating unit, at least one attachment unit and at least one store wall. Said coupling structural group is provided with an actuating group which is closed in the non-activated state, comprising an operating part, a ratchet connected to said operating part, and an elastic element. With the present invention, the possibilities of using a chair are extended. Fig. 1;

Description

Description Title of the invention: Seating furniture equipped with a marginal zone interface dedicated to attached units

[0001] — The invention relates to a seating unit comprising a right side and a left side respectively located at a distance from a vertical longitudinal median plane of said furniture of the base, knowing that a structural coupling group, intended to receive a part a plug-in unit is attached to each of the aforementioned sides of said seating furniture, given that the individual structural coupling group includes at least one receiving recess oriented at least approximately in the direction transverse with respect to said median longitudinal vertical plane, and knowing that all the reception recesses of an individual structural coupling group are oriented parallel to each other and presenting, associatively, an area of cross-section differing from a circular surface; to a row of furniture seating comprising at least two pieces of seating; as well as a chair system consisting of at least one piece of seating, at least one additional unit and at least a shop wall.

[0002] = A chair, having replaceable added parts, is known from the document DE 20 2006 016 214 Ul. A lever must be operated each time to lock it. at home and the release of the reported parties.

[0003] — The present invention is based on the problem of extending the possibilities using a chair.

[0004] — This problem is resolved by the characteristics of the claim main. To this end, the structural coupling group is provided with a group closed actuation mechanism in the deactivated state, comprising an operating part, a ratchet mechanism connected to said operating part, and an elastic element. The elastic element constrains the ratcheting pawl relative to a recess of reception, so that the said ratcheting pawl rises, when the group the actuation is closed, in a closed position in which said pawl of The notching covers, in zones, the cross-sectional area of ​​at least this recess. receiving, which is turned towards said ratchet. The ratchet can also to be moved by means of the operating part, under the constraint of the elastic element, from the obturator position to a release position in which, in a normal projection onto the vertical longitudinal median plane, said ratcheting mechanism is located outside the projection of the aforementioned cross-sectional area of ​​this reception obviously.

[0005] The individual seating unit is equipped, both on the right side of the seating unit and on the On the left side of the seating unit, there is a marginal interface zone where add-on units can be mounted and dismounted without tools. The seating unit is equipped, on both sides, with a structural coupling group into which an add-on unit can be received by means of a plug-in part, based on complementary shapes. A ratchet latch, located on the seating unit side, secures the position of the add-on unit relative to the seating unit. The removal of the added unit is achieved by means of an actuation group that moves the ratchet pawl to a release position from the fully relieved closing position. The ratchet pawl is then held in the direction of the closing position by means of an elastic element. When a new added unit is added, its plug-in portion is inserted into the structural coupling group, into which it automatically snaps. The seating unit described is stackable, allowing for the replacement of additional units even when stacked. The seating unit, comprising at least one inserted unit with a plug-in component, can be linked to other seating units of this type. This linking can be designed with or without a locking mechanism. Furthermore, a seating system is described, consisting of at least one seat unit and a shopfront display unit equipped with add-on units. These add-on units can thus be interchanged between the shopfront display unit and the seating units. Other specific features of the invention will become apparent from the dependent claims and the descriptions below of the embodiments schematically represented in the figures. These are illustrated as follows: [Fig.1] chair; [Fig.2] view from below the chair of [Fig.1]; [Fig.3] detail of the left side of the chair from [Fig.1], in the deposited state of the brought unit; [Fig.4] detail of the right side of the chair from [Fig.1], in the deposited state of the added unit; [Fig.5] Structural coupling group, on the left, in release position; [Fig.6] Structural coupling group, on the right; [Fig.7] posterior face of the [Fig.5], in obturator position; [Fig.8] Structural coupling group, on the left, in the closed position; [Fig.9] unit reported as a unit forming an armrest; [Fig.10] chair with shelf unit as an added unit; [Fig.11] unit added as a sealing piece, on the right; [Fig.12] unit added as a sealing piece, on the left; [Fig.13] row of chairs with chained chairs; [Fig.14] chair with locking device; [Fig.15] chair from [Fig.13], in the deposited state of the seat shell; [Fig.16] pair of chained chairs with locking mechanism; [Fig.17] stacking of chairs according to [Fig.1]; [Fig.18] storage cart. Figures 1 to 8 show a seating unit (10; 110) designed in the style of a chair (10; 110), and some of its specific features. This chair (10; 110) is equipped, for example, with a one-piece frame (20) and a seat structure (90) structurally in the form of a one-piece seat shell (91). The chair (10; 110) may have a frame (20) in several parts and / or a seat structure (90) composed, for example, of two parts. In the case of a two-part seat structure (90), the backrest (93) is, for example, attached to the frame (20). It is also possible to design the chair (10; 110) as a swivel chair, a chair with free suspension, etc. The seating furniture (10; 110) can also be an armchair, a stool, etc. The frame (20) shown is a tubular structure (20) manufactured, for example, by welding or brazing. It consists, for example, of chrome-plated, burnished, or lacquered steel tubing. The steel tubing used has, for example, an outside diameter of 18 mm and a wall thickness of 2 mm. The frame (20) comprises two double-legged elements (21, 31) connected to each other by means of a front brace (28) and a rear brace (38), see [Fig. 2]. The two double-legged elements (21, 31) are oriented parallel to each other. They are arranged, for example, with mirror symmetry about a vertical longitudinal median plane of the chair (10; 110). The respective front legs (22; 32) and rear legs (23; 33) of a double-legged element (21; 31) form an acute angle with each other. This angle measures 40 degrees in the embodiment shown.The virtual vertex of this angle is located above the frame (20). The front leg (22; 32) then describes, for example, an angle of 12 degrees with a vertical. The frame (20) is provided on either side, next to the seat shell (91), with a longitudinal member (24; 34) that connects the two legs (22, 23; 32, 33) of a double-legged element (21; 31). In this embodiment, the longitudinal member (24; 34) describes an angle of 8 degrees with a support plane of the chair (10; 110). This longitudinal member (24; 34) slopes down from the front side (11) of the chair towards the rear (12) side of the chair. The individual element (21; 31) with double base, including the stringer. (24; 34), is for example made from a tube bent twice. The bend radius measures, for example, 25 millimeters each time. The seat shell (91) rests on the frame (20) via an adapter (40) made of reinforced plastic, optionally fiberglass-reinforced. For the sake of example only, the adapter (40) is made in two parts. It is divided into right-hand (41) and left-hand (42) structural adaptation groups. Each structural adaptation group (41, 42) consists of a lower part (43) and an upper part (44). For example, the upper and lower parts (43, 44) jointly encircle—with screw fastening—the side rails (24, 34), at least in sections, between the cross members (28, 38). The seat shell (91) includes a seat (92) and a backrest (93). It is made, for example, of laminated wood, synthetic resin-bonded particleboard, or a similar material, or of a composite material. The seat shell (91) shown has an average material thickness of 10 mm, for example. It may serve as a support for padding and an underlying shell. The seat (92) has, for example, a constant width of approximately 443 mm and a maximum seat depth of 420 mm. It is provided with a central region and a marginal region. The median section of said marginal region lies at least approximately in a plane, while said central region forms a downward-sloping trough, for example, 25 mm in diameter. At the front, said seat (92) is downward-sloping by, for example, 27.5 mm, with a radius of, for example, 33 mm. The backrest (93), whose lower width corresponds to the seat width and whose height measures, for example, 434 mm, is attached to the seat (92) via a rounded transition zone. The upper edge of the backrest (93) is curved in an arc, for example, with a radius of curvature of approximately 780 to 800 mm—perpendicular to the inclination of the backrest. The average inclination of the backrest measures, for example, 15 to 17 degrees. The backrest (93) narrows laterally towards the top, for example, by 4 to 5 degrees at each point. The seat (92) and the backrest (93) form, on average, an angle of between 95 and 105 degrees. The seating unit (10; 110) is provided, on both the right (13) and left (14) sides of said seating unit, with a marginal interface zone (15) located on the seating unit side, see Figures 3 and 4. This marginal interface zone (15) is provided, in each case, within a structural coupling group (50; 60). In the embodiment shown, the individual structural coupling group (50; 60) is housed and fixed within the frame (20) of the seating unit (20). However, it is also conceivable to fix the respective structural coupling group (50; 60), along with the marginal interface zone (15), to the shell. of the seat (91) and, for example, on the underside of the seat (92). Said marginal interface zone (15) is part of an interface (15, 125) whose second marginal interface zone (125) is located on a pluggable part (121; 131) of an added unit (120). The individual structural coupling group (50; 60), see Figures 5-8, comprises a coupling housing (51; 61) on which an actuation group (71) is mounted. In the embodiment shown, the coupling housing (51; 61) is made of chrome steel, for example S 355 JR with material number 1.0045. This coupling housing (51; 61) is, for example, welded to the frame (20). Another permanent fixing of this structural coupling group (50; 60) to the frame (20) or to the seat shell (91) is also conceivable. The individual coupling housing (51; 61) is at least approximately parallelepiped in design. In the exemplary embodiment, the coupling housing (51) on the right side (13) of the seating unit has two receiving recesses (52, 53). The coupling housing (61) on the left side (14) of said seating unit is additionally provided, for example, with a bolt housing (64) which is interposed between the receiving recesses (62, 63). The receiving recesses (52, 53; 62, 63) and the bolt housing (64) are oriented, for example, perpendicular to the vertical longitudinal median plane of the seating unit (10; 110). They may also deviate from the perpendicular direction by an angle of up to 10 degrees. In the embodiment example, the two coupling housings (51; 61) are arranged with mutual symmetry with respect to this vertical longitudinal median plane. The receiving recesses (52, 53; 62, 63) of a coupling housing (51; 61) are designed as through bores and are arranged parallel to each other. Each has a cylindrical diameter of 11 millimeters. The tolerance range for this bore diameter is rated H7 according to DIN EN ISO 286. The distance between their centers is, for example, 2.7 times their diameter. It is also possible to design the two receiving recesses (52, 53; 62, 63) of a coupling housing (51; 61) with different diameters. The cross-sectional areas of the individual receiving recesses (52, 53; 62, 63) of a structural coupling group (50; 60) are arranged, for example, with a mutual offset in a plane parallel to the vertical longitudinal median plane. The envelope profile of these two cross-sectional areas forms, for example, an oval surface. The configuration of the sum of the cross-sectional areas is a non-circular surface. The sum of all the cross-sectional areas of the receiving recesses (52, 53; 62, 63) of the coupling housing (51; 61) can be, for example, triangular, rectangular, square, hexagonal, elliptical, etc. The area of The cross-section of an individual receiving recess (52; 53; 62; 63) can also, for example, fulfill this condition, In the exemplary embodiment, the bolt housing (64) is designed as a cylindrical bore in the left-hand coupling housing (61). The diameter of said bolt housing (64) represents, for example, 72% of the diameter of a receiving recess (52; 53; 62; 63). Said bolt housing (64) opens into a blind hole (45) with a central perforation (46), located in the lower part (43). The diameter of said central perforation (46) represents, for example, 47% of the diameter of a receiving recess (52; 53; 62; 63). The blind hole (45), provided with the perforation (46), can also be located in the coupling housing (51; 61). It is also conceivable to conceal said bolt housing (64), on the side pointing towards the vertical longitudinal median plane, by means of a perforated disc, a piece integrated into the bore, etc. The actuation group (71) comprises an operating member (72), a ratchet (73), and a spring element (74). In the embodiment shown, the ratchet (73) and the operating member (72) form a single structural part. However, it is also possible to construct the ratchet (73) and the operating member (72) as two structural parts flexibly connected to each other. In the exemplary embodiment, the ratcheting pawl (73) is pivotally mounted in a pivoting joint (75) on the coupling housing (51; 61). This ratcheting pawl (73) can be moved relative to the coupling housing (51; 61) between the closed position (76) shown and a release position (79). In the closed position (76), the ratcheting pawl (73) covers, at least in certain areas, the cross-sectional area of ​​a first receiving recess (52; 62) within the receiving recesses (52, 53; 62, 63) of the coupling housing (51; 61). In the exemplary embodiment, this overlap represents 7% of the cross-sectional area of ​​the first receiving recess (52; 62).In the release position (79), a normal projection of the ratchet (73) onto the vertical longitudinal median plane lies entirely outside the projection, onto said vertical longitudinal median plane, of the cross-sectional area of ​​said first receiving recess (52; 62) which is oriented towards said ratchet (73). Consequently, the first receiving recess (52; 62) considered is not covered in the release position (79). The thickness of said ratchet (73), made for example of steel, represents for example 27% of the nominal diameter of the receiving recess (52; 53; 62; 63). As an alternative to a pivoting movement, the ratcheting pawl (73) can also, for example, be moved between the closing position (76) and the release position. (79) by means of a linear movement. The joint (75) for mounting the ratchet (73) vis-à-vis the coupling housing (51; 61) is then made, for example, as a sliding joint. Said ratchet (73) can also be mounted inside said coupling housing (51; 61), in a guide slot for example. In the exemplary embodiment, the elastic element (74) is a pressure spring interposed between the coupling housing (51; 61) and the ratchet (73). The use of a tension spring is similarly conceivable. Said elastic element (74) constrains the ratchet (73), relative to the coupling housing (51; 61), such that said ratchet (73), when not activated, stands in the closed position (76). In the actuation group (71), the ratchet (73) is thus monostable in said closed position (76). In the exemplary embodiment, the operating member (72) of the actuation group (71) is a lever (72) comprising two triggering surfaces (77, 78). The two triggering surfaces (77, 78) are rigidly connected to each other. These two triggering surfaces (77, 78) are accessible from the underside of the chair (10; 110). A first triggering surface (77) is located on the inner face of the front leg (22; 32), which is oriented towards the vertical longitudinal median plane. A second triggering surface (78) is located behind said front leg (22; 32) in the longitudinal direction of said chair (10; 110). An alternative arrangement of the two triggering surfaces (77, 78) is also conceivable. If, in the upright position of the seat (10; 110), one of the trigger surfaces (77; 78) is pressed towards the seat shell (91), the ratchet (73) pivots towards the release position (79) around the pivot joint (75). When the operating member (72) is released, the elastic element (74) returns the ratchet (73), by pivoting, to the closed position (76). The operating member (72), rigidly connected to the ratchet (73) in the embodiment, also pivots towards the initial position like a lever. A flexible connection between the operating member (72) and the ratchet (73) can, for example, be achieved as a one-sided stop hinge. The ratchet (73) is opened when pressure is applied to the operating member (72). When the operating member (72) is released, the movement of the ratchet is then decoupled from the movement of the operating member (72). The use of a textile strip between the operating member (72) and the ratchet (73) is conceivable, for example, when using a sliding ratchet (73). In the representation in [Fig. 1], the chair (10; 110) has two attached units (120) structurally designed as armrest units (141, 142). A right-hand armrest unit (141) is located on the right side (13) of the seat, and a left-hand armrest unit (142) is located on the left side (14) of the seat. Each of the two armrest units (141, 142) has a plug-in portion (121; 131) that is secured in a respective structural coupling group (50; 60) of the seat (10; 110). A cantilevered arm (143), extending upwards beyond the considered plug-in portion (121; 131), merges into a projecting armrest (144), oriented at least approximately horizontally. In the exemplary embodiment, this cantilevered arm (143) describes a rearward angle of 15 degrees to a vertical.The cantilevered arm (143) and the respective armrest (144) of the two units (141, 142) forming armrests are arranged in mirror image. The two units (141, 142) forming armrests extend laterally beyond the width of the frame (20). The left-hand insertable part (131), illustrated in Figures 1 and 2, has a downward-opening recess (132) for receiving a tenon. This tenon-receiving recess (132) may, for example, have a square cross-sectional area with a rear handle (133), see [Fig. 12]. A tenon (122) with a solid head from another seating element (110; 10), located on the right-hand insertable part (121), is received by means of this tenon-receiving recess (132), see Figures 13 and 16. Several seating elements (10, 110) can thus be linked together. In the embodiment shown in [Fig. 1], a bolt guide (134) is centrally provided in the tenon receiver recess (132), see [Fig. 16]. In the assembled state of the plug-in part (131), this guide is aligned with the bolt housing (64) of the coupling housing (61). This plug-in part (131) can also be designed without a bolt guide (134). The tenon (122) with a solid head on the right-hand plug-in portion (121) may include a recess (123) occupying, for example, a central location, see [Fig. 11]. This recess (123) has, for example, an oval cross-section. The longitudinal direction of the oval is oriented, for example, in the vertical direction. It is also conceivable to interchange the right and left structural coupling groups (50; 60). The associated plug-in parts (121; 131) of the added units (120) are then adapted accordingly. Figure 9 shows, as an added unit (120), a unit (141) forming a right-hand armrest. The plug-in part (121) is provided with two insertable bolts (126, 128). These two insertable bolts (126, 128) are arranged parallel to each other. On the other hand, their mutual spacing corresponds to the spacing of the receiving recesses (52; 53) of the right-hand coupling structural group (50). In the embodiment shown, the insertable bolts (126, 128) have the same length and diameter. Their length is, for example, 40% greater than the length of the receiving recesses (52, 53) of the coupling housing (51). The length of the individual insertable bolt (126, 128), for example cylindrical, is, for example, 3.3 times its diameter. The nominal diameter of said individual insertable bolt (126, 128) corresponds to the nominal diameter of the corresponding receiving recess (52, 53), with a tolerance of -0.02 millimeters. Insertable bolts (126, 128) are adapted accordingly in the presence of receiving recesses (52, 53; 62, 63) of a different geometric configuration.The material of said insertable bolts (126, 128) is, for example, an austenitic steel, for example X5CrNi 18 5 bearing the material number 1.4301. The two insertable bolts (126, 128), both of a right-hand insertable portion (121) and a left-hand insertable portion (131), are a first insertable bolt (126) and a second insertable bolt (128), see also Figures 11 and 12. Said first insertable bolt (126) is provided, in the region of its free end (129), with a groove (127) for engagement, structurally taking the form of an annular groove (127). The distance between said annular groove (127) and a bearing surface (124) of the insertable portion (121, 131) is, for example, half a millimeter less than the length of the receiving recess (52, 53; 62, 63). The length of said annular groove (127) is, for example, 30% greater than the thickness of the ratcheting pawl (73). The diameter of said annular groove (127) represents 86% of the diameter of the insertable bolt (126).The second insertable bolt (128) is designed without an annular groove (127) in the exemplary embodiment. Said ratcheting pawl (73) engages in said annular groove (127) when said pluggable part (121; 131) is in the mounted state on the chair (10; 110). The free ends (129) of the two insertable bolts (126, 128) are cap-shaped. A frustoconical embodiment is also possible. In this case, the minimum diameter of said free ends (129) is smaller than the diameter of the insertable bolt (126) in the region of the annular groove (127). In the embodiment shown, the diameter represents 38% of the diameter of the insertable bolt (126; 128) at the tip of said individual insertable bolt (126; 128). The region of the attached unit (120) that is located outside the marginal interface zone (125) is, for example, injection-molded with plastic. The cantilevered arm (143) located on the plug-in part (121), and the armrest (144) of the unit (144) forming an armrest illustrated in [Fig. 9], are made in the manner described above. In place of an armrest (144), the plug-in part (121; 131) individual can also carry a tablet (153), see [Fig.9], a sealing piece (163), see figures 10 and 11, a resting tray, a bottle holder, an infusion gantry, a newspaper holder, a pocket tray, a power outlet, etc. To remove one of the armrest units (141; 142) of the chair (10; 110) shown in Figures 1 and 2, for example, the user applies pressure with the fingers of one hand to the operating part (72) of the actuating group (71) assigned to that side of the chair. This can be done from the front side (11) of the chair, or from the respective right (13) or left (14) side. The ratchet (73) is moved to the release position (79) under the pressure of the elastic element (74). The user can then use their other hand to remove the armrest unit (141; 142). The release of said operating part (72) causes said ratchet (73) to return to the closing position (76). When using a new armrest unit (141; 142) or another added unit (120), the plug-in portion (121; 131) is engaged on the coupling housing (50; 60) such that the first insertable bolt (126) is inserted into the first receiving recess (52; 62), and the second insertable bolt (128) is inserted into the second receiving recess (53; 63). During insertion, the plug-in portion (121; 131) is guided within the structural coupling assembly (50; 60). As insertion continues, the first insertable bolt (126) strikes the ratchet (73) with its free end (129). Due to the geometric design of said free end (129), the ratcheting pawl (73) is moved in the direction of the release position (79). Said ratcheting pawl (73) comes into contact with the surface of the casing of said insertable bolt (126).Shortly before the bearing surface (124) comes into contact with the coupling housing (51; 61), the ratchet (73) springs into the annular groove (127), thereby releasing the elastic element (74). The plug-in part (121; 131) is thus stopped in the structural coupling assembly (50; 60). The plug-in part (121; 131) and the structural coupling assembly (50; 60) can thus be assembled and separated quickly and without tools. The chair (10; 110) can now, for example, be chained together with other chairs (110; 10). The chair (10; 110) shown in [Fig. 10] has, on its left side (14), a unit (142) forming an armrest. This armrest is made, for example, in the same way as the left armrest unit (142) of the chair (10; 110) illustrated in Figures 1 and 2. An added unit (120), structurally in the form of a tablet unit (151), is attached to the frame (20) on the right side (13) of the chair. The tablet unit (151) shown includes a plug-in part (121) of On the right, a cantilevered arm (152), a joint group (154), and a shelf (153). The plug-in portion (121) is designed, for example, as described in the context of the preceding embodiments. The cantilevered arm (152) projects upward and forward beyond the plug-in portion (121). It describes, for example, an angle of 30 degrees with a vertical. The tablet (153) is designed like a plate. In the embodiment shown, it is mounted on the cantilevered arm (152) by means of a hinge group (154). It can pivot to a resting position from the operating position shown in [Fig. 10] about a first pivot axis (155) oriented in the longitudinal direction (5) of the chair (10; 110) and about a second pivot axis (156) oriented in the transverse direction (6) of said chair (10; 110). In this resting position, said tablet (153) rests, for example, vertically on the outer face of said cantilevered arm (152). The tenon (122) with a solid head on the plug-in part (121) remains accessible in this case. Another chair (110; 10) can thus be coupled to the first chair (10; 110). The use of an intermediate plate is similarly conceivable. An added unit (120), structurally in the form of a right-hand shutter unit (161), is illustrated in [Fig. 11]. It comprises a right-hand plug-in portion (121), the insertable bolts (126, 128) of which are designed as described in the preceding embodiments. This plug-in portion (121) is provided with a support body (136) connecting the two insertable bolts (126, 128) to each other. A shutter piece (163) covers the receiving recesses (52, 53; 62, 63) of the respective coupling housing (51; 61). On the side pointing opposite the insertable bolts (126, 128), the pluggable portion (121) carries the tenon (122) with a solid head. This tenon is designed in the manner described in the context of the preceding embodiment examples. Figure 12 shows an added unit (120) structurally in the form of a left-hand obturator unit (162). The arrangement of the insertable bolts (126, 128) is mirror-image with the arrangement of the insertable bolts of the right-hand plug-in part (121). This prevents the plug-in part (121; 131) from being inserted incorrectly into the wrong side (13; 14) of the chair. The left-hand plug-in part (131) has a tenon-receiving recess (132). This tenon-receiving recess (132) is designed, for example, as described in the context of the first embodiment. The plug-in part (131) shown in Figure 12 does not have a bolt guide (134). The assembly and disassembly of the shelf unit (151) and the shutter units (161, 162) are carried out in the manner described for the armrest units (141, 142). In this way, the attached units (120) of a seating unit (10; 110) can be Combined and interchangeable almost at will, for example, each chair (10; 110) in a row of linked chairs can have only one unit (142) forming a left armrest, or only one unit (141) forming a right armrest. Two adjacent chairs (10, 110) can be fitted with units (141; 142) forming armrests that point towards each other, or in opposite directions. Stopper units (161; 162) or other units, within the aforementioned attached units (120), can, for example, be used on the sides (13; 14) of said chairs that lack units (141; 142) forming armrests or units (151) with shelves. Figure 13 is a view from below of a row (8) of linked seating furniture (10, 110). The front sides (11) of the chairs face downwards. The side (14) under consideration, located to the left of a chair, is on the left. Both chairs (10, 110) have attached units (120) that are structurally in the form of shutter units (161; 162), see Figures 11 and 12. The respective plug-in part (121) on the right has a tenon (122) with a solid head. The respective plug-in part (131) on the left has a tenon housing (132) facing outwards. The said tenon (122) with a solid head is integrated into the said tenon housing (132) at the coupling (16) for attaching the two chairs (10; 110). To separate the two chairs (10; 110), the chair (10) in question, located on the right, is, for example, lifted a few centimeters so that the tenon housing (132) is no longer engaged with the tenon (122) with its solid head. Now, the separated chairs (10; 110) can be grouped together again, stacked, etc. To re-couple the two chairs (10, 110), they are, for example, placed side by side. Now, the chair (10) on the right is raised so that the tenon housing (132) can be engaged above the tenon (122) with the solid head. In the sequence, the coupled chairs stand in a straight or curved row (8). Figure 14 is a bottom view of a chair (10; 110) equipped with an additional locking device (171) for locking rows (170). A bolt removal device (172) is mounted on the frame (20), below the seat shell (91). This bolt removal device (172) is equipped with a bolt removal lever (173), which is applied against the adapter (40) in the embodiment shown. The pivot axis of said bolt removal lever (173) is, for example, oriented vertically. The end (174) of said lever which is turned away from the user is connected, for example by means of a screw (175), to a locking bolt (176) mounted to slide in the bolt housing (64) in the left coupling housing (60), see figures 15 and 16.The nominal diameter of the screw (175) is smaller, for example by one millimeter, than the diameter of the through bore of said end (174) of the lever, which secures said screw (175). The bolt of . The locking bolt (176) bears against a locking spring (177) in the blind bore (45). In the coupling housing (61), the locking bolt (176) is guided linearly in an oblong hole (65), with rotational locking, by means of a transverse pin (178) made, for example, in the form of a guide pin (178). The oblong hole (65) is oriented parallel to a centerline of the locking bolt (176). The locking bolt (176) is made of steel. It has a cylindrical cross-sectional area whose diameter represents, for example, 72% of the diameter of an insertable bolt (126, 128). The length of the locking bolt (176) is 6.35 times its diameter in the exemplary embodiment. The locking bolt (176) is provided with a chamfer (181) in its lower region, at its outermost free face (179). This chamfer (181), oriented in the direction of the coupling housing (61), describes, for example, an angle of 37 degrees with a vertical plane. This angle can measure between 30 degrees and 45 degrees. It is also possible to design the entire outermost face (179) of said locking bolt (176) as an inclined surface. In the assembled state of the attached unit (120), the locking bolt (176) passes completely through the bolt guide (134) of the pluggable part (131). In the tenon housing (132), said locking bolt (176), relieved of pressure, protrudes, for example, by half its diameter, beyond the base surface (137) of the tenon receiving recess (132). Fig. 16 shows two chairs (10, 110) coupled by means of the row locking mechanism (170). These two chairs (10, 110) are coupled to each other by means of the tenon (122) with a solid head and the tenon housing (132), as described above. The locking bolt (176), constrained by the locking spring (177), also engages in the recess (123) of the tenon (122) with a solid head. In the event of a row of chairs tipping over, in case of panic, the coupling of the two chairs (10, 110) remains secured by means of the row locking mechanism (170). The two chairs (10, 110) can move, relative to the recess (123) of the tenon (122) with a solid head, only within the limits of the play of the locking bolt (176). The bolt removal device (172) is actuated to separate the two chairs (10, 110). For this purpose, the bolt removal lever (173) pivots in the direction of the vertical longitudinal median plane of the chair (10, 110). Under the tension of the locking spring (177), the screw (175) drives the locking bolt (176) into the coupling housing (61). The chair (10, 110) carrying the locking bolt (176) can now be lifted, the tenon-receiving recess (132) then sliding out of the tenon (122) with its head massive. To connect two chairs (10; 110) using the row locking mechanism (170), the chair (10; 110) carrying the tenon housing (132) and the locking bolt (176) can be slightly lifted and presented to the other chair (110; 10), as described previously. During the guidance of the tenon housing (132) along the solid-headed tenon (122), the bevel (181) of the locking bolt (176) meets the upper face of the solid-headed tenon (122). Under the tension of the locking spring (177), the locking bolt (176) is moved in the direction of the coupling housing (61). As soon as the locking bolt (176) reaches the chamber (123) of the tenon (122) with a solid head, said locking spring (177), relaxing, moves said locking bolt (176) for the purpose of engaging in said chamber (123) of said tenon (122) with a solid head. In the example embodiment, the locking of the row connection is achieved via a mechanical sliding joint. This can be replaced, for example, by a helical joint or by a joint combining sliding and helical action. In this case, a linear movement is planned for the coupling offset. However, it is also possible to make this movement occur along a curved, two-dimensional, or three-dimensional trajectory. The locking device (171) can be adapted afterward to suit the chair (10; 110). For this purpose, the locking spring (177) and the locking bolt (176) are inserted into the bolt housing (64) and the blind hole (45), and held in place by the guide element (178). The bolt removal lever (173) is attached to the locking bolt (176) from the inner face of the chair (10; 110) by means of the screw (175). Figure 17 shows a stack (9) of chairs (10, 110). In this illustration, four chairs (10, 110) of the same type are stacked one on top of the other. In this embodiment, all the chairs (10, 110) have attached units (120) that are structurally presented as armrest units (141; 142). These armrest units (141; 142) are attached to the frame (20) of the chair (10; 110) by means of a respective plug-in part (121; 131). Each of the plug-in parts (121) on the right, shown here, has a tenon (122) with a solid head and a counterbore (123). In this way, each chair can be erected individually or in a row, with or without row locking (170). To prepare the chairs (10, 110) for furnishing a room with chairs, the added unit (120) in question can, for example, be replaced. To this end, the user intervenes in the stacking (9) below the stringer (24) of the frame (20) of a chair (10, 110), for example, from the side (13) located to the right of said chair. At this location, it activates the actuating group (71) and extracts the unit (141) forming the right armrest. Said unit (141), having been removed, forming the right armrest, is, for example, stored in a magazine. In the sequence, the user retrieves, for example, from said magazine, a replacement unit (120) structurally in the form of a right-hand shutter unit (161). The latter is mounted on the chair (10, 110), as described above. In the next stage, the stack (9) of chairs (10, 110), thus prepared, can be transported to the destination, for example, to the room to be furnished with chairs. Figure 18 shows a storage trolley (190). This trolley is equipped with a support frame (191) that can be moved on four casters (192). Two handles (193) guide the storage trolley (190) along the floor. The storage trolley (190) has a central support frame (194) that carries four storage panels (195). Each storage panel (195) can, for example, be arranged vertically. Instead of being attached to a storage trolley (190), the individual storage panel (195) can also be attached to a wall of the room, stand upright on the floor, etc. The individual magazine wall (195) is provided with two vertical alignments (196, 197), each containing multiple pairs of holes (198) arranged in a superimposed configuration. Each pair of holes (198) is designed and positioned so that a respective plug-in part (121; 131) can be inserted into it. The individual hole has, for example, the diameter of a receiving recess (S2; 53; 62; 63) of the structural coupling group (50; 60). A corresponding metal sleeve can, for this purpose, be inserted into the magazine wall (195). One of the vertical alignments (196; 197) receives the plug-in parts (121) on the right, the other vertical alignment (197; 196) receives the plug-in parts (131) on the left. The two vertical alignments (196, 197) are arranged in a superposition at the two extreme faces (199) of the storage trolley (190). They are placed side by side at the longitudinal faces. The storage cart (190) shown carries, for example, one hundred units (141) forming right-hand armrests and one hundred units (142) forming left-hand armrests. The individual storage wall (195) forms a seating system in conjunction with the chair (10; 110). In this seating system, at least one add-on unit (120) with a plug-in portion (121; 131) can be substituted between the storage wall (195) and the chair (10; 110). To mount an add-on unit (120) installed on the storage wall (195), the unit is removed from the storage wall (195) and inserted onto the chair (10; 110), as described above. An add-on unit (120) detached from the chair (10; 110) is inserted into a slot free interlocking, on the wall (195) of the store. For example, at the stage of preparing the furnishing of a room with chairs using such a chair system, the user can easily identify, by means of the lining of said wall (195) of the store, whether all the chairs (10, 110) have the equipment provided. Combinations of the implementation examples are equally conceivable. List of digital references: 5. Longitudinal direction 6 transverse direction 8 rows of seating furniture, row of chairs 9. Stacking of seating furniture 10. Seating furniture, chair 11 front side of the chair 12 rear side of the chair 13th side of the seating unit, on the right 14th side of the seating unit, on the left 15 marginal interface zone on the seating furniture side, part of an interface (15, 85) 16 coupling attachment of (10; 110) 20 frame, tubular frame 21 double-legged element, on the right 22 base, at the front 23 base, at the rear 24 longitudinal member 28 spacer, at the front 31st element with double base, on the left 32 base, at the front 33 base, at the rear 34 longeron 38 spacer, at the rear 40 adapter 41 structural adaptation group, on the right 42 Structural adaptation group, left 43 lower part 44 upper part 45 blind drilling 46 perforation 50 Structural coupling group, right 51 coupling housing 52 receiving recess, first receiving recess 53 obvious reception 60 Structural coupling group, left 61 coupling housing 62 receiving recess, first receiving recess 63 receiving recess 64 bolt housing 65 oblong hole 71 actuation group '72 operating part, lever '73 ratchet ratchet 74 elastic element 75 joint, pivot joint 76 shutter position T7 trigger surface, first trigger surface 78 trigger surface, second trigger surface 79 release position 90 seat structure 91 seat shell 92 seats 93rd file 110 seating furniture, chair 120 units reported 121 plug-in part, on the right 122 solid head tenon 123 chambering 124 bearing surface 125 marginal interface zone, part of an interface (15, 125) 126 insertable bolt 127 annular groove, groove for engagement 128 insertable bolt 129 free end 131 plug-in part, on the left 132 tenon receiver recess, tenon housing 133 rear handle 134 bolt guide 136 support bodies 137 base area of ​​(132) 141 unit forming armrest, on the right 142 unit forming armrest, on the left 143 cantilevered arm 144 armrests 151 tablet units 152 cantilevered arms 153 tablet 154 joint group 155 first pivot axis 156 second pivot axis 161 shutter unit, right 162 shutter unit, left 163 sealing piece 170 row locks 171 locking device 172 bolt removal device 173 bolt removal lever 174 end of the lever 175 screws 176 locking bolt, locking piece 177 locking spring, pressure spring 178 cross pin, guide pin 179 extreme face of (176) 181 bevel of (176) 190 storage cart 191 support frame 192 casters 193 grab bars 194 support frame 195 shop walls 196 alignment of pairs of holes (198) 197 alignment of pairs of holes (198) 198 pair of holes 199 extreme face of (190)

Claims

Demands

1. Seating furniture (10; 110) comprising a right side (13) and a side left (14) respectively located at a distance from a median plane long- vertical gitudinal of said seating furniture (10, 110), knowing that a group structural coupling (50; 60), intended to receive a part in- a fichable (121; 131) of a reported unit (120), is implanted on each of the aforementioned sides (13, 14) of the said seating furniture, knowing that the group individual structural coupling (50; 60) includes at least one reception area (52; 53; 62; 63) oriented at least approximately tively in the transverse direction relative to said longitudinal median plane vertical gitudinal, and knowing that all the receiving recesses (52; 53; 62; 63) of an individual structural mating group (50; 60) are oriented parallel to each other and present, associa- tively, an area with a cross-section differing from a surface circular, characterized by the fact that the structural coupling group (50; 60) is provided of an actuation group (71) closed in the inactivated state, comprising an operating part (72), a ratchet of notching (73) connected to said operating part (72), and a elastic element (74), that the elastic element (74) constrains the ratcheting mechanism (73) in relation to at least one receiving recess (52; 53; 62; 63), so that said ratcheting pawl (73) draws, when the actuation group (71) is closed, in a closing position (76) in which said ratchet of notching (73) covers, by zones, the cross-section area transverse of at least this receiving recess (52; 53; 62; 63), which turned towards the said ratchet, ct that the ratcheting pawl (73) can be moved by means of the operating part (72), under the constraint of the element elastic (74), from the obturator position (76) to a position of release (79) in which, in a normal projection on the vertical longitudinal median plane, said ratchet of notching (73) is located outside the projection of the area of the aforementioned cross-section of this receiving recess 152:53; 62:63).

2. Seating furniture (10; 110) according to claim 1, characterized by the the fact that it is equipped, each time, with two bases (22, 23; 32, 33) for each of the sides (13; 14) of the said seating furniture, knowing that the the feet (22, 32) respectively located at the front are parallel to each other the other, and that the supports (23, 33) located at the rear are arranged pa- parallel to each other.

3. Seating furniture (10; 110) according to claim 1, characterized by the fact that at least one of the structural mating groups (50; 60) includes a bolt housing (64), and a bolt removal device (172) bolt that can be actuated under the force of a spring rusting (177).

4. Seating furniture (10; 110) according to claim 1, characterized by the the fact that it carries a reported unit (120) provided with a part in- pluggable (121; 131), said pluggable part (121; 131) being stopped in the structural coupling group (50; 60) by means of the ratchet notching (73).

5. Seating furniture (10; 110) according to claim 4, characterized by the the fact that the reported unit (120) is a unit (141; 142) forming armrest, a unit (151) with a shelf, a shutter unit (161, 162), a bottle holder unit or a unit with a resting tray.

6. Seating furniture (10; 110) according to claim 4, characterized by the do that the reported unit (120) includes a marginal zone interface (125), provided in the pluggable part (121; 131) and equipped with at least one insertable bolt (126) comprising a groove (127) for engagement, and that the cross-sectional areas of all the bolts in- maple trees (126, 128) of a pluggable part (122; 131) present a complementary achievement to that of the areas of cross-section of the receiving recesses (52, 53; 62, 63) of a structural coupling group (50; 60).

7. Seating furniture (10; 110) according to claim 6, characterized by the the fact that at least one pluggable part (121; 131) is equipped with a guide- cylindrical bolt (134), oriented parallel to the insertable bolt (126) and designed as a through bore.

8. Row (8) of seating furniture comprising at least two pieces of furniture seating (10, 110) conforming to claim 4, characterized by the fact that the pluggable part (121; 131) of a first seating piece (10; 110) carries a tenon (122) with a solid head that fits into a housing (132) of tenon, open downwards, of the pluggable part (131; 121) of a second piece of seating furniture (110; 10).

9. Row (8) of seating furniture according to claim 7, characterized by the fact that a locking (170) of rows, equipped with a locking bolt- rust (176) penetrating a chamber (123) of the tenon (122) with head massive and unlockable by means of the removal device (171) bolt, ensures the reciprocal coupling of the seating furniture (10; 110).

10. Chair system consisting of at least one seating unit (10; 110) in accordance with claim 1, of at least one reported unit (120) and of at least one store wall (195), knowing that at least one unit reported (120) can be implanted, in a releasable manner, on said wall (195) of store and on said seating furniture (10; 110).