Device for removably connecting accessories to a bedstead

Abstract: The device comprises a pivot pin (6) integral with one bed component (7) having a substantially elliptical transverse section defining minimum dimensions (d) and maximum dimensions (D). A seating (8) defined by an engagement element (9) carried by a second bed component (10) has a circular profile the diameter (D') of which is equal to the maximum dimensions (D) and broken by a substantially rectilinear access opening (14) having substantially the same width (d') as the minimum dimensions (d). The pivot pin (6) can be removably engaged in the seating (8) in a radial direction and according to a predetermined orientation in order to connect the first component (7) to the second component (10) in such a way as to enable a rotation of predetermined amplitude.

Description: The present invention relates to a device for removably connecting accessories to a bedstead, comprising: at least one pivot pin integral with a first component of a bed; at least one engagement element carried by a second component of said bed and having a seating adapted to house said pivot pin in order to afford a relative rotation between the first and second components about a predetermined pivot axis. It is known that in beds the presence of at least one mattress is conventionally provided, which is disposed on a spring support structure suitably engaged to a bearing framework or bedstead provided in turn with support elements resting on ground or bedposts. In the case referred to the present description the spring support structure forming the bed bottom sheet consists of a plurality of wooden laths or staves disposed side by side and connected at their ends to the bedstead. In many cases it is useful to engage some accessory components such as for example supporting tops, side rails, headboards and others to a bedstead, in a removable and rotatable manner. In the following description reference will be particularly made, as an example of an accessory component, to an adjustable reclining end portion of the spring support structure, rotatably engaged to the bedstead according to a horizontal axis, transverse to the longitudinal bed extension. Presently, for the purpose of linking an adjustable reclining end portion or any other accessory to the bedstead, it is generally necessary to pierce a through hole on the two sides both of the bedstead and the adjustable end portion, into which hole a pivot element consisting for example of a rivet or a threaded element can be axially engaged. According to another solution the adjustable end portion or a different accessory element is provided at each end with at least one cylindrical pivot element axially fitted in an engagement element consisting of a tubular body integral with the bedstead. From Fr-A- 2 202 433 it is known a bed comprising at the ends two structures associated in oscillating way to a pair of longitudinal elements. A support for a mattress is placed in the space between the two structures. The construction is made for having the support on the same plane than that of the two oscillating structures. The problem faced in this patent is that of avoiding in a high production the welding between the support and the longitudinal elements so that in presence of change of dimensions of the two oscillating structures is possible to adopt the appropriate dimension of the support without mistakes. The solution to the above problem is that of forming the support by moulding with protuberances to be introduced in openings of the longitudinal elements of the bedframe. The support comprises also seatings adapted to enable pivot pins of the structures to be fitted through access openings according to a predetermined orientation and to be angularly rotated. In accordance with the present invention, it is found that in order to pivotally mount any accessory comprising a pivot element to a bedstead at an engagement element, while avoiding at the same time resorting to connection between the parts by means of screws and the like and keeping the possibility of disengaging said accessory in order to remove it from the engagement element without needing tools and complicated operations and without modifying the support surface of the bed it is suitable that the connection between the pivot element and engagement element occurring in a radial direction or along an arc of a circle, for example from top to bottom instead of resorting to an axial fitting, comprises a wing between the pivot and the engagement element to enable the surface of the accessory to conform in height to the support surface of the bed. In particular the invention relates to a device for removably connecting accessories to a bedstead comprising a supporting surface, said device comprising: at least one pivot pin integral with a first bed component; at least one engagement alement carried by a second component of said bed and having a seating adapted to house said pivot pin in order to offer a possibility of relative rotation between the first component and the second component about a predetermined pivot axis, said pivot pin exhibiting a transverse section in which minimum overall dimensions (d) and maximum overall dimensions (D) are at least identified, said seating exhibiting a substantially circular profile, the diameter (D') of which is substantially equal to said maximum dimensions (D), broken by an access opening the width of which is included between the minimum dimensions (d) and maximum dimensions (D) of the transverse section of the pivot pin, said pivot section and seating shape being adapted to enable the pivot pin to be fitted into the seating through the access opening according to a predetermined orientation and to be angularly rotated about its own axis in order to oscillatably engage the first component to the second component according to an angle of predetermined aperture about said pivot axis, said device being characterized in that it comprises a connecting wing between the pivot pin and a plate belonging to an accessory, the length of said wing being adapted to enable the surface of said accessory to conform in height to the remaining support surface of the bed at any position reached by the accessory during its oscillations through a rotational angle of predetermined width. Hereinafter by substantially circular profile it is intended the fact that the seating may comprise a profile defined by a single radius of a circle or several arcs of circles or arcs substantially approaching the form of arcs of circles, provided that in all possible embodiments provision is made for a seating adapted to enable said fitting of the pivot pin into the seating and then the oscillation of the first component on the second component. Preferably said access opening in the seating is directed upwardly and the central axis of the opening is at right angles to the base surface of the second component lying in a horizontal plane. In one embodiment said pivot pin is inserted radially in the seating through the access opening. In a still more preferable solution the device is characterized in that the first component is radially inserted in the seating from top, according to a first position which is the endmost with respect to all positions corresponding to the several different inclinations of the first component starting from the introduction position as far as the end-of-stroke position. Still preferentially the device is characterized in that said wing and the walls delimiting the seating opening comprise mutually abutting side surfaces designed to constitute end-of-stroke or limit means for the oscillations of said accessory. In a further preferred embodiment the excursion of the first component is defined by an angle of predetermined aperture between the introduction and end-of-stroke positions, said angle being included between 90° and 40°. Yet more preferentially the device is characterized in that said wing form an angle of predetermined width with said plate. In accordance with the above solution the device is characterized in that the angle between said wing and plate is included between 45° and 70°. A further feature of the device is represented by the fact that the first component maintains each of the inclined positions by means of a thrust mechanism having one end associated with the bedstead and provided with an adjustable extension. Preferably the cross section of the pivot pin has a substantially circular profile the diameter of which is substantially equal to the diameter of the seating and is broke by at least one substantially rectilinear portion in order to establish the minimum dimensions; in greater detail the cross section of the pivot pin may exhibit two symmetrically opposite substantially rectilinear portions. In addition, the pivot pin at a circular portion of its transverse profile is rigidly connected to an anchoring plate connected to the first component. This connection is preferably executed close to the rectilinear portion. Still in accordance with a preferential solution, the pivot pin is integral with one end of a connecting wing extending obliquely to the anchoring plate. In greater detail the wing defines an acute angle with the plate, the aperture of which is substantially included between 50° and 60° and is for example 55°. In a preferential solution the first component consists of an accessory element and the second component consists of a bedstead. In greater detail, the engagement element is carried by an extruded section member associated with the bedstead and disposed transversely; the accessory element, in turn, is comprised of an adjustable reclining end portion of the spring support structure. In this embodiment the rectilinear portion of the pivot pin in cross section is substantially parallel to a plane defined by the adjustable end portion so that said end portion operates between one limit position in which it is substantially oriented in a vertical direction and a second limit position in which the adjustable end portion is substantially horizontal. Still in more detail, the adjustable end portion is connected to the main bedframe by two coaxial pivot pills engaging in a single seating formed along the extruded section member associated with the bedstead. Preferably, the seating exhibits a longitudinal flaring at the inlet which is adapted to facilitate the pivot insertion. According to a preferential solution the pivot and engagement elements have different surface hardnesses and in particular the surface hardness of the engagement element is greater than that of the pivot pin. Further features and advantages will become more apparent from the detailed description of a preferred embodiment of a device for removably connecting accessory elements to a bedstead, in accordance with the present invention. This description is given hereinafter by way of non-limiting example with reference to the accompanying drawings, in which: Fig. 1 is a partly longitudinal sectional view of a bed provided with a device pivotally connecting an adjustable reclining end portion of a spring support structure of the bed to an extruded section member associated with a bedstead; Fig. 2 shows a detail of Fig. 1 to an enlarged scale, representing the device of the invention in a disassembled condition (continuous line) and assembled condition (dotted line), respectively. Referring to the drawings, a device removably connecting accessory elements to a bedstead 2 in accordance with the present invention has been generally denoted by 1. The device 1 is associated with a conventional bedstead 2 only partly shown as not of importance to the ends of the invention. This bedstead 2, widely described in the Italian patent application MI92A 001160 filed on same date in the name of the same applicant, comprises a pair of longitudinal members 3, only one of which is partly shown, with which a spring support structure 4 comprised of a plurality of staves 5 preferably made of wood, is associated, said staves being connected at their ends to the bedstead along appropriate grooves 3' provided in the longitudinal members 3 and being disposed transversely side by side. The foregoing being stated, the device 1 comprises at least one pivot pin 6 rigidly carried by one accessory component that, in the example shown, consists of an adjustable reclining end portion 7 of the spring support structure 4. In greater detail, in the embodiment described the adjustable end portion 7 carries at its ends two coaxial pivot pins 6 which are symmetrically disposed. Each pivot pin 6 is operatively engaged, as better clarified in the following, in a seating 8 formed in an engagement element 9 integral with a second component of the bed. In the example shown, the second component is defined by an extruded section member 10, made of aluminium or alloys thereof for example, transversely fastened to the bedstead 2 and incorporating said engagement element 9 so that the seating 8 extends throughout the section member length. Said section member 10, which in turn is the object of the Italian copending patent application MI92A 001158 in the name of the same applicant, is also adapted to the fastening, among other things, of bedposts 11, only one of which, of tubular form, is partly shown. The bedpost, through a screw and nut assembly 11' is associated with a grooved seating 12' formed in the section member 10. The adjustable end portion 7 is also linked to the bedstead 2 by a regulation kinematic mechanism consisting of a strut of adjustable length which is not further described in detail or shown, as known per se and conventional. It is shortly pointed out that the above strut can have one extremity associated with the portion 7 for example by inserting a pin in an elongated hole of said portion, and the opposite extremity associated with a rectilinear bar comprising a toothed system fixedly associated with the section member 10 or part of the frame; in this mechanism the strut is provided to be hinged at an intermediate position of its extension with a crosspiece in turn connected at its free end to a toothed element meshing with the toothing of the rectilinear bar. The inclination of the adjustable end portion 7 takes place in register with the movement of the toothed element on the bar toothing. Alternatively, known lever means may be provided which are commonly used in the furniture field for tilting a chair back, for example. In accordance with the present invention each pivot pin 6 for example has a substantially elliptical cross section defining minimum dimensions "d" and maximum dimensions "D". In an original manner, the seating 8 also exhibits a circular profile the diameter "D'" of which is substantially equal to the maximum dimensions "D" and is broken by an access opening 14 which is preferably turned upwardly and the width "d'" of which is substantially equal to the minimum dimensions "d". In this manner, each pivot pin 6 can be inserted in the seating 8 from top to bottom through the access opening 14 according to a vertical orientation and be subsequently rotated about its own axis so as to engage the adjustable end portion 7 to the bedstead 2 with possibility of movement from the introduction position as far as the end-of-stroke position. In particular, the operation involving the insertion of the pivot pin 6 in the seating 8 is made easier by the fact that the seating 8 is provided at the access opening 14 with at least one longitudinal flaring 15. In greater detail, such a flaring 15 defines an angle the aperture of which substantially corresponds to that of the central angle defined by the access opening on the circular profile of the seating. Said central angle can be for example in the range of 56° to 156° and in particular between 70° and 120°. In accordance with the present invention and in a particular embodiment thereof, the transverse section of the pivot pin 6 exhibits a substantially circular profile, the diameter of which substantially corresponds to the maximum dimensions "D" and therefore to the diameter of seating "D'", broken by at least one secant rectilinear portion 16a. In greater detail, in the example shown the circular profile is broken by a pair of symmetrically opposite and parallel rectilinear portions 16a defining the minimum dimensions "d" according to a direction perpendicular to the rectilinear portions. The pivot pin 6 thus made can therefore be inserted in the access opening 14 and at the same time it exhibits a pair of circular portions 16b the bending of which substantially corresponds to that of the seating. Each of said circular portions 16b defines, together with the seating 8, a corresponding contact surface of important width, capable of causing an advantageously distribution of loads, which results in an important reduction of the wear due to rubbings produced by the pivot pill within the seating 8, in addition to making the pivot pill rotation easier. Preferentially, the engagement element 9 has a surface hardness different from that of each pivot pin 6; in greater detail in the example described the surface hardness of the engagement element 9 is higher than that of the pivot pins 6 so that the possible wear due to rubbing can occur only on the pivot pins. Each pivot pin 6 is also connected, at one of the circular portions 16a, to a wing 17 for connection with an anchoring plate 18 removably fastened to the adjustable end portion 7, by means of threaded elements 18a, for example. As a result, when the pivot pin 6 is worn it will be sufficient di disengage the anchoring plate 18 from the adjustable end portion 7 for replacing said pin. The wing 17 performs several functions. One function is that of adapting the height of the adjustable portion 7 comprising staves 5' to the plane in which the fixed staves 5 forming the spring support structure are disposed. A predetermined length of the wing 17 enables the obtention, for any position of the adjustable portion 7, of an overall surface capable of supporting the user. In accordance with the invention it is possible to take advantage of several adjustable portions 7, to be associated with plates 18 comprising wings 17 of different lengths, which makes it possible to use, depending on the various differences in height between the section member 10 and fixed staves 5, the most suitable combination for the formation of the desired support surface. The wing 17 can also perform the function of determining the stop means for the oscillation of the adjustable portion 7. Said stop means is obtained in combination with the walls of the opening 14 provided in the seating 8. For the purpose, in fact, the opposite sides 17' of the wing 17 and the flared surfaces 15 of the opening 14 are used. Preferentially the adjustable portion 7 is introduced radially from top into the central opening of the seating 8 defined by a central axis of symmetry x-x which is perpendicular to the horizontal plane of the section member 10. The first component, due to its introduction into the seating, takes a first radial position also constituting the only withdrawal position. This first position of the first component is the endmost position relative to all the other inclined positions with respect to the section member 10. At the limit positions the opposite sides of the wing 17 are in abutment against at least one point of the flarings 15 in the seating 8. Preferably the excursion angle of the wing 17 has a predetermined aperture between two limit values. In fact a small excursion angle would be preferable as it would enable a small central opening of the seating 8 defined by flarings 15 to be determined, in order to create a strong resistance to the withdrawal of the first component. On the other hand, a big excursion angle would be preferable for enabling the achievement of many inclinations of the first component with respect to the end position. Taking into account the above problem, the optimal solution has been identified by an excursion angle in the range of 90° to 40°. In particular, the end-of-stroke position of the adjustable portion 7 can correspond to a horizontal arrangement in which the end of portion 7 rests on stop points (not shown) of the section member 10 or in general on points of the bedstead. According to other embodiments a radial spoke (not shown) may be provided which projects from the centre of the pivot pin 6 and is designed to come in abutment on appropriate stop surfaces of the section member 10 so as to set the end-of-stroke positions of the adjustable portion 7, irrespective of the stops consisting of flarings 15. The wing 17 forms a predetermined angle with the plate 18. Preferably said angle is included between 45° and 70°. According to one embodiment the angle "b" between the wing 17 and plate 18 is 55° and the rotation front the introduction position to the position setting the portion 7 in a horizontal arrangement is 70°. According to another embodiment, the angle between the wing 17 and plate 18 is 90° and the rotation of the portion 7 between the horizontal arrangement and the introduction position is 45°. Yet in another embodiment, the angle "b" between the wing 17 and plate 18 is 70° and the rotation between the limit positions is 40°. In a still further embodiment the angle "b" is 52.5° and the wing excursion between the introduction position and end-of-stroke position is 75°. In this solution the wing 17 is 2.5 mm thick and the angle of the access opening delimited between surfaces 15 is 106.8°. In the above examples positions offering a horizontal arrangement at heights which are different from one another are achieved, depending on the selection of angles "b". Therefore it will be possible to use, in accordance with different bedsteads, either of the existing wings so as to enable the adjustment of possible differences in height between the section member 10 and fixed staves 5. In accordance with another solution, a first position of the first component or adjustable portion 7 could be provided corresponding to its radial introduction with respect to the seating 8 and a second and third positions of the adjustable portion 7 rotated in the two ways respectively from the first position, so as to form end-of-stroke configurations of the adjustable portion 7. In the examples described it is apparent that in the side positions following the first introduction position it is not possible to withdraw the end portion 7 by virtue of the opposition exerted against areas of the pivot pin 6 by the curved surfaces disposed below the apices of flarings 15. Advantageously, in another preferential solution the connection between each pivot pin 6 and the corresponding wing 17 is made adjacent one end of one of the rectilinear portions 16a. During the normal use of the bed there will be no risks that the adjustable end portion 7 should become disengaged from the bedstead 2, since the orientation of the end portion 7 is at all events inclined to the bedstead 2 and its coming out is prevented by the walls delimiting the seating and by the shape of the pivot pin. By way of further example, the following geometric features of the device with reference to the main elements thereof are hereinafter reproduced. Pivot pin 6 Minimum dimensions "d" included between 3 and 12 mm. Maximum dimensions "D" included between 6 and 14 mm. Length included between 30 and 200 mm. In accordance with some solutions it would be possible to use a single pivot pin of a length substantially corresponding to that of the seating 8 or even less. In other embodiments portions 16a of the pivot pin could have a curvilinear profile the convexity of which faces away from the plate 18, for example according to an arc of an ellipse or parabola. In an embodiment shown, these curvilinear profiles consist of concentric arcs of circles in which the difference between radii corresponds to the thickness "d" of the pivot pin; in one embodiment these radii are 16.6 and 24 mm respectively and the centre is on the opposite side relative to the kinematic regulation mechanisms of portion 7. Said solution providing curvilinear profiles offers a means capable of favourably counteracting the withdrawal of the first component when it does not occupy the introduction position in the seating 8. In this solution the insertion of the pivot pin takes place along an arc of a circle. Seating 8 Size of the circular profile "D'" included between 6 and 14 mm. Opening size "d'" included between 3 and 12 mm. Central angle defined by the access opening included between 70° and 150°, preferably between 90° and 150°, 110° for example. Wing 17 Length measured between points z, z' (Fig. 2) included between 6 and 100 mm, 12.6 mm for example. Wing thickness included between 1.5 and 4 mm, 2.5 mm for example. Angle between the vertical central axis y of pin 6 and longitudinal centre line of wing 17 passing by the pin centre, included between 35° and 75°. Plate 18 Length between 30 and 200 mm. Width between 30 and 200 mm. Thickness between 2 and 8 mm. The present invention attains important advantages. In fact, as compared to the known art, the device in question has a much simpler structure and advantageously offers easier assembling. In the different solutions utilized by the known art in which the use of pivot elements axially fitted in the respective seatings was provided, it was in fact necessary to carry out additional operations in order to cause the axial locking of the pivot elements. In accordance with the present invention the pivot pin 6 is instead radially inserted in the seating 8 through the access opening 14 and therefore need not particular expedients for axial locking. With reference to the particular embodiment described, in which the accessory element consists of the adjustable reclining end portion 7, it is possible to see how the possibility of engaging the two pivot pins 6 in the seating 8 in a radial direction greatly facilitates the coupling and uncoupling operations of the adjustable end portion 7 with respect to the bedstead 2 and how it is not necessary to resort to particular expedients for carrying out the axial locking, since it is the end portion itself that acts laterally in abutment against the longitudinal members 3 in order to prohibit any possible displacement along the pivot axis. It should be also recognized that hinging carried out in accordance with the known art envisages the interposition of at least one annular antifriction element generally made of nylon between a generic pivot element and the respective seating. Such antifriction elements, by virtue of their nature, can be easily worn out, which gives rise to an undesirable play by the pivot pin in its seating. As a result of this, an unpleasant noise occurs at the hinging and above all the pivot element is subjected to bending and therefore it works in an inappropriate manner, which in the long run may cause its breaking. The connection made through the device of the invention need not the use of antifriction elements and therefore does not suffer from the above drawback. Obviously, modifications and variations may be made to the invention as conceived all of them falling within the scope of the inventive idea as defined in the accompanying claims. In addition, the device enables one accessory to be replaced by another, by merely carrying out easy operations involving the radial removal of the first component 7 from the engagement seating 8. Therefore it is possible to take away one bedhead having a given covering fabric material and replace it by another bedhead provided with a covering material more appropriate to the particular season or just for the purpose of meeting different furniture requirements. In particular the device in question can be used for connecting any accessory element to the bedstead, which element may also have a different typology than the one previously described. In addition, the access opening 14 of the seating 8 could start on the front portion of the section member 10 thereby offering greater excursion angles to the wing 17 as compared with those mentioned in connection with the opening of Figs. 1 and 2. In this solution the central axis x-x of the pivot pin 7 would be introduced in a direction laterally inclined with respect to that perpendicular to the base plane of the section member 10 relating to the solution shown in Figs. 1 and 2. In another embodiment the wing 17 could be inclined in such a way as to form an obtuse angle b with the downwardly directed plate surface, instead of an acute angle as shown in the figures.

Claims: A device for removably connecting accessories to a bedstead comprising a supporting surface, said device comprising: at least one pivot pin (6) integral with a first bed component (7); at least one engagement element (9) carried by a second component (10) of said bed and having a seating (8) adapted to house said pivot pin (6) in order to offer a possibility of relative rotation between the first component (7) and the second component (10) about a predetermined pivot axis, said pivot pin (6) exhibiting a transverse section in which minimum overall dimensions (d) and maximum overall dimensions (D) are at least identified, said seating (8) exhibiting a substantially circular profile, the diameter (D') of which is substantially equal to said maximum dimensions (D), broken by an access opening (14) the width of which is included between the minimum dimensions (d) and maximum dimensions (D) of the transverse section of the pivot pin (6), said pivot section and seating shape being adapted to enable the pivot pin (6) to be fitted into the seating (8) through the access opening (14) according to a predetermined orientation and to be angularly rotated about its own axis in order to oscillatably engage the first component (7) to the second component (10) according to an angle of predetermined aperture about said pivot axis, said device being characterized in that it comprises a connecting wing (17) between the pivot pin (6) and a plate (18) belonging to an accessory which is oscillating in relation to the rotation of the pivot pin within the seating (8), the length of said wing being adapted to enable the surface of said accessory to conform in height to the remaining support surface of the bed at any position reached by the accessory during its oscillations through a rotational angle of predetermined width. A device according to claim 1, characterized in that said bedstead comprises a spring support structure for the user's rest, said seating (8) of the second bed component being at a lower position than and spaced apart from said spring support plane in such a way that following the rotation of the pivot pin a single support structure is formed which comprises a portion of variable adjustable arrangement. A device according to claim 1, characterized in that said wing and the walls delimiting the seating opening comprise mutually abutting side surfaces designed to constitute end-of-stroke or limit means for the oscillations of said accessory. A device according to claim 1, characterized in that it comprises a first position of the first component in the bedstead corresponding to its radial introduction with respect to the seating (8), said first position being the endmost with respect to all positions corresponding to the several different inclinations of the first component relative to the horizontal plane of the second component. A device according to claim 1, characterized in that it comprises a first position of the first component in the bedstead corresponding to its radial introduction with respect to the seating (8) and a second and a third position of the first component rotated in the two ways respectively from the first position, so as to form end-of-stroke configurations of the oscillations of the first component. A device according to claim 1, characterized in that the opening (14) in the seating (8) is directed upwardly and the angle of predetermined width between the introduction position of the first component and the end-of-stroke position of the oscillating accessory is included between 90° and 40°. A device according to claim 1, characterized in that said wing forms an angle of predetermined width with said plate (18). A device according to claim 7, characterized in that the angle between said wing and plate is included between 45° and 70°. A device according to claim 1, characterized in that the first component maintains each of the inclined positions by means of a thrust mechanism having one end associated with the bedstead and provided with an adjustable extension. A device according to claim 1, characterized in that the access opening (14) has substantially the same size as the minimum dimensions (d) of the pivot pin (6). A device according to claim 1, characterized in that the access opening (14) is directed upwardly and the central axis (x-x) of the seating (8) is at right angles to the horizontal base surface of the second component. A device according to claim 1, characterized in that the transverse section of the pivot pin (6) has a substantially circular profile the diameter of which substantially corresponds to the diameter (D') of the seating (8), and is broken by at least a substantially rectilinear portion (16a) in order to define the minimum dimensions (d). A device according to claim 12, characterized in that the transverse section of the pivot pin (6) has a pair of symmetrically opposite substantially rectilinear portions (16a). A device according to claim 12, characterized in that the pivot pin (6) at a circular portion (16b) of its transverse profile is rigidly connected to an anchoring plate (18) connected to the first component (7). A device according to claim 14, characterized in that the connection between the pivot pin (6) and anchoring plate (18) is carried out close to the rectilinear portion (16a). A device according to claim 12, characterized in that the pivot pin (6) is integral with one end of a connecting wing (17) extending obliquely from the anchoring plate (18). A device according to claim 16, characterized in that the wing (17) and the plate (18) define an acute angle the aperture of which is substantially included between 50° and 60°. A device according to claim 1, characterized in that the first component (7) is an accessory element and the second component (10) is a bedstead (2). A device according to claim 19, characterized in that the engagement element (9) is carried by an extruded section member (10) transversely associated with the bedstead (2). A device according to claim 18, characterized in that the accessory element consists of an adjustable reclining end portion (7) of a spring support structure (4) being part of the bed. A device according to claim 20, characterized in that the transverse section of the pivot pin (6) has a substantially circular profile the diameter of which is substantially the same as the seating (8) diameter and is broken by at least one rectilinear portion (16a) substantially parallel to a plane defined by the adjustable end portion (7). A device according to claim 21, characterized in that the adjustable end portion (7) is movable between a first end-of-stroke position in which it has a substantially vertical orientation and a second end-of-stroke position in which the adjustable end portion (7) is substantially horizontal, said first end-of-stroke position corresponding to a condition of insertion of the pivot pin (6) in said access opening (14). A device according to claim 21, characterized in that the adjustable end portion (7) is connected to the bedstead (2) by two coaxial pivot pins (6). A device according to claim 23, characterized in that the two coaxial pivot pins (6) engage in one engagement element alone (9) which is formed longitudinally on an extruded section member (10) associated with the bedstead (2). A device according to claim 1, characterized in that the seating (8) at the access opening has a longitudinal flaring (15) adapted to facilitate the insertion of the pivot pin (6). A device according to claim 1, characterized in that the pivot pin (6) and the engagement element (9) have different surface hardnesses. A device according to claim 1, characterized in that the engagement element (9) has a surface hardness greater than that of the pivot pin (6). A device according to claim 12, characterized in that the transverse section of the pivot pin (6) has two curvilinear portions. A device according to claim 12, characterized in that the transverse section of the pivot pin has a first pair of circular upper and lower portions (16b) and a second pair of side portions consisting of two concentric arcs of circles in which the difference between the respective radii is equal to the minimum dimensions (d) of the pivot pin and the centre is on the opposite side with respect to the regulation kinematic mechanisms, said second pair being adapted to achieve the introduction of the pivot pin through the seating access opening (14) along an arc of a circle.

Inventors: BALLOTTA MARIO, DAMINELLI GIOVANNI, BALLOTTA, MARIO, DAMINELLI, GIOVANNI
Applicants: SAPSA BEDDING SPA, SAPSA BEDDING S.P.A.
Application year: 1993
Main classification: A47C20
IPC codes: A47C19, A47C20, A47C21