Frame for sewing upper pillows on covering shells for mattresses

Description

[0001] The present invention relates to a frame for sewing upper pillows on covering shells for mattresses.

[0002] Mattresses have undergone considerable advances in recent years: such advances have concerned the materials that constitute them, their structure and the presence/absence of specific components.

[0003] Recently the adoption is increasingly frequent of technical solutions that involve a true mattress, parallelepiped in shape, which is contained inside two substantially mirror-symmetrical shells, which are mutually interconnected along respective facing and proximate edges.

[0004] The coupling can be fixed (for example by way of stitch lines and/or edging) or detachable (for example using zip fasteners and/or strips of Velcro® and the like).

[0005] In this type of mattress, recently we have witnessed the spread (and to the great appreciation by customers) of mattresses that are provided with an accessory component called a "pillow top".

[0006] This embodiment involves the arrangement of a padded pillow of varying thickness on the top of the mattress, so as to define a soft layer at the surface upon which the users lie.

[0007] The thickness of this pillow is, generally, a few centimeters (starting from a minimum of approximately one centimeter up to 5 or more centimeters); despite the scant thickness, the interposition of this pillow between the mattress itself and the sheet offers the user a sensation of great comfort.

[0008] It is evident that this implementation solution requires an increase in the number of steps of working on the semi-finished product that will constitute the upper shell of the mattress.

[0009] In order to ensure a sufficient qualitative standard of the finished product, placing the pillow top on the respective shell and the corresponding mutual coupling are operations that are generally performed manually by specialist craftworkers.

[0010] This therefore determines a considerable increase in the costs of mattresses provided with these pillow tops, which relates to the cost of the labor necessary for their production.

[0011] Furthermore the production times are rather long, with consequent production limits that are linked to the need for manual intervention on each one of the mattresses: an increase in productivity is necessarily associated with the hiring of additional specialist craftworkers, who are able to carry out the necessary work.

[0012] The artisan nature of the work, furthermore, does not permit a standardization of the product within narrow margins, without providing for a high number of production discards.

[0013] This applicant has recently filed two patent applications that relate to technical solutions aimed at solving the problems cited above.

[0014] In particular, EPA 14157884.9 discloses and claims a particular frame that enables an easy mutual positioning of the components on which it is necessary to execute the sewing operations (the shell and the upper pillow). The presence of such frame also makes it possible to identify a new type of optimized sewing machine that adopts it, and a new method of producing mattresses provided with "pillow tops".

[0015] In order to increase the automation and reduce the intervention of operators to the minimum, the Italian patent application no. BO2013A000211 relates to an improved machine that is adapted to sew the upper pillow to a respective shell and which requires only a minimal intervention by operators.

[0016] In reality the intervention of the operators, even in the technical solutions disclosed in the two patent applications cited above, in any case constitutes an important portion of the unit cost of the end product that is produced (the semi-finished product constituted by the shell with the upper pillow sewn on top).

[0017] In some cases, the influence of labor on the cost of the product can be such as to render the technical solutions disclosed in the two patent applications cited above insufficient to achieve an objective of economy of optimal execution, which is required by the makers of mattresses.

[0018] US-A-3 180 293 discloses a quiering machine comprising upper and lower perimetric frames and a stationary sash-like railframe. The aim of the present invention is to solve the above mentioned drawbacks, by providing a frame for sewing upper pillows on covering shells for mattresses which is suitable for automating the operations to juxtapose the upper pillow with the respective shell.

[0019] Within this aim, an object of the invention is to provide a frame for sewing upper pillows on covering shells for mattresses which does not require intervention by operators for the change of format operations.

[0020] Another object of the invention is to provide a frame for sewing upper pillows on covering shells for mattresses which makes it possible to increase the productivity of the machine and/or plant in which it is installed.

[0021] Another object of the invention is to provide a frame for sewing upper pillows on covering shells for mattresses which makes it possible to obtain a juxtaposition with optimal alignment of the upper pillow with the respective shell in order to achieve a constant and high qualitative standard of the semi-finished products that it produces.

[0022] Another object of the present invention is to provide a frame for sewing upper pillows on covering shells for mattresses which is low cost, easily and practically implemented and safe in use.

[0023] This aim and these objects are achieved by a frame for sewing upper pillows on covering shells for mattresses, which comprises four perimetric walls, each wall being perpendicular to the two contiguous walls and comprising at least one laminar portion that constitutes a resting surface, said laminar portion being co-planar with a lower edge of said wall, at least one of said walls comprising at least one locking element for at least one component, selected from between an upper pillow and a covering shell, arranged on a respective laminar portion, characterized in that at least one of said walls comprises at least two bands that are mutually aligned and can slide with respect to each other in order to vary the overall length of the wall, between said at least two bands of said wall there being interposed a linear actuator for the controlled mutual sliding thereof, said actuator being adapted to be controlled by a respective control and management unit of a sewing machine that is functionally associatable with said frame.

[0024] Further characteristics and advantages of the invention will become better apparent from the detailed description that follows of a preferred, but not exclusive, embodiment of the frame for sewing upper pillows on covering shells for mattresses, according to the invention, which is illustrated by way of non-limiting example in the accompanying drawings in which:

Figure 1 is a schematic axonometric view of a frame for sewing upper pillows on covering shells for mattresses according to the invention;

Figure 2 is an enlarged view of a first detail of the frame in Figure 1;

Figure 3 is a schematic axonometric view of the frame in Figure 1 in a first step of adjusting dimensions;

Figure 4 is a schematic axonometric view of the frame in Figure 1 in a second step of adjusting dimensions;

Figure 5 is an enlarged view of a second detail of the frame in Figure 1, in the configuration of locking the pillow on the shell;

Figure 6 is an enlarged view of a third detail of the frame in Figure 1, in the open configuration;

Figure 7 is a front elevation view of a machine for sewing upper pillows on covering shells for mattresses;

Figure 8 is a schematic side view of a first step of operation of the frame according to the invention;

Figure 9 is a schematic side view of a second step of operation of the frame according to the invention;

Figure 10 is a schematic side view of a third step of operation of the frame according to the invention;

Figure 11 is a schematic side view of a fourth step of operation of the frame according to the invention.

[0025] With reference to the figures, the reference numeral 1 generally designates a frame for sewing upper pillows on covering shells for mattresses.

[0026] The frame 1 according to the invention, in an embodiment thereof that is particularly simple and functional, comprises four perimeter walls 2.

[0027] Each wall 2 is perpendicular to the two walls 2 that are contiguous thereto and comprises at least one laminar portion 3 that constitutes a resting surface: the shell that is intended to line one half of the mattress will be laid on such surface, and the pillow top will subsequently be fixed on such shell.

[0028] The laminar portion 3, in order to obtain a structure that is functional and with contained encumbrances, will preferably be co-planar with a lower edge of the wall 2: in essence the laminar portion 3 will constitute a lower frame of the walls 2 that is designed to define a resting base for the shell.

[0029] At least one of the above mentioned walls 2 will comprise at least one locking element 4 for at least one component, selected from between an upper pillow and a covering shell, which is arranged in turn on a respective laminar portion.

[0030] According to the invention, at least one of the walls 2 comprises at least two bands, respectively 5 and 6 (on the short walls 2, with particular reference to the accompanying figures) and 7 and 8 (on the long walls 2, with particular reference to the accompanying figures) which are mutually aligned and can slide with respect to each other in order to vary the overall length of the wall 2 that they define.

[0031] It should be noted that between the at least two bands 5 and 6 (and also between the at least two bands 7 and 8) of the wall 2, a linear actuator 9 (or 10 on the wall 2 of greater length) will be interposed for the controlled mutual sliding of those bands.

[0032] The actuator 9 and/or 10 will in turn be controlled by a respective control and management unit of the sewing machine that is functionally associated with the frame 1.

[0033] This will make the system that is constituted by the frame 1 and by the machine 100 a single plant in which the frame 1 is run integrally with the machine 100.

[0034] In essence the adjustment of the dimensions of the frame 1 will be set by the control and management unit of the sewing machine.

[0035] The advantage of this solution is the complete automation of operations.

[0036] In fact, the operator will only have to select the program corresponding to the sewing process to be executed (which will comprise the dimensions of the mattress that it is intended to produce, the stitch types, their geometry and the affixing of any accessory labels): the control and management unit will send specific signals to the linear actuators 9 and 10 in order to adjust the dimensions of the frame 1 so that it will be able to correctly accommodate the respective shell and, obviously, also the corresponding pillow (as specified below).

[0037] At this point the control and management unit will command the locking means 4 to lock the shell on the laminar portions 3.

[0038] The arrangement of the pillow on top of the shell that was previously coupled to the frame 1 can be done manually by an operator and/or be completely automated, comprising respective apparatuses for depositing the pillow on the frame 1, for example of the type disclosed in Italian patent application no. BO2013A000211.

[0039] It should be noted that, according to a particular embodiment of undoubted practical and applicative interest, the at least two bands 5 and 6 (and/or 7 and 8) are coaxial, one at least partially inside the other.

[0040] In this embodiment the bands 5, 6 and/or 7, 8 are able to slide telescopically, one inside the other, by way of the action of the respective linear actuator 9 and 10 (respectively) in order to vary the overall length of the respective wall 2.

[0041] It should be noted that, with particular reference to an embodiment of undoubted efficiency, all four of the walls 2 are constituted by at least two bands 5, 6 and 7, 8.

[0042] In this particular case, at least two contiguous walls 2 will comprise a respective actuator 9 and/or 10 for varying the length and the width of the frame 1.

[0043] In order to ensure that the size variations of the frame 1 are fluid and that no jamming will occur owing to interference and/or friction, it should be noted that each wall 2 will comprise a respective actuator 9 and/or 10 for varying the length and the width of the frame 1.

[0044] The actuator 9 and 10 is of the type selected preferably from among a hydraulic cylinder, a pneumatic cylinder, a motor assembly 11, 12 and an endless screw 13, 14, a linear induction motor, an oscillating slot link, an apparatus provided with a rack and pinion, and the like.

[0045] The embodiment shown in the accompanying figures for the purposes of non-limiting explanation is a frame provided with actuators 9 and 10 that are constituted by respective motor assemblies 11, 12 and endless screws 13, 14.

[0046] On the work surface of the invention described, it should be noted that the locking element 4 can conveniently comprise at least one angular abutment 4a that can move from a first configuration, for the insertion of the shell in the frame 1, in which it is arranged substantially outside the walls 2, to a second configuration, for locking the corners of the shell, juxtaposed with the laminar resting portion 3 for the shell at the corners of the shell. In such second configuration the corners of the shell will be aligned and accommodated in the corners of the frame 1, and locked there by the respective angular abutments 4a.

[0047] The presence of four angular abutments 4a (one at each corner of the frame 1), which are capable of moving and adapting to the variations in dimensions of the frame 1, enable an effective locking of the shell, ensuring that it is completely spread out on the frame and that there are no overlaps, wrinkles or arrangements that are not compliant with the requirements of the subsequent sewing.

[0048] The embodiment of greatest interest in terms of practical implementation involves a locking element 4 that comprises a bracket 15 that can move from a first configuration (substantially open), for the insertion of the shell in the frame 1 (resting on the laminar portions 3), in which it is arranged substantially outside the walls 2, to a second configuration, for locking the shell, in which such bracket 15 is juxtaposed with the laminar portion 3 and thus is resting on the shell.

[0049] When the bracket 15 is in the second configuration, the shell is thus clamped between the laminar portions 3 and the bracket 15, and is thus rigidly locked on the frame 1: different types of embodiment are possible, including the solution of undoubted practical interest in which the shell is held on the laminar portions 3 on the four sides of the frame 1. Embodiments are not ruled out in which the shell is locked on the laminar portions 3 only on two mutually opposite sides of the frame 1.

[0050] It should further be noted that the locking element 4 further comprises a retention tab 16 that can move from a first configuration, for the insertion of the pillow in the frame 1 on top of the shell (which was previously locked on the frame 1 by way of the bracket 15), in which it is arranged substantially outside the walls 2, to a second configuration, for locking the pillow on the shell, in which such retention tab 16 is juxtaposed with the laminar portion 3, with the interposition of the shell, of the bracket 15, and of the pillow.

[0051] The at least one laminar portion 3 constitutes a resting surface that is extended along the entire length of the respective wall 2, thus accommodating the shell and the pillow and supporting the perimeter thereof.

[0052] The laminar portions 3 of the walls 2 thus define a lower resting border that lies on the plane that contains the lower edge of the walls 2.

[0053] It should be noted that the angular abutment 4a, the resting bracket 15 and the retention tab 16 are associated with the frame 1 with respective articulation elements 17, 18 that are controlled by specific actuation means 19 and 20 (in the accompanying figures the articulation elements and the actuation means for the movement of the angular abutment 4a are not specifically shown since they are apparatuses of the conventional type, which may be substituted with others that have the same functional characteristics and are based on different principles).

[0054] The actuation means 19 and 20, which are generally constituted by controlled electric motors (however, the possibility is not ruled out in which they are operated manually), can also be controlled by the control and management unit for the automation of the movements of the bracket 15 and of the tab 16.

[0055] The possibility is not ruled out however of adopting actuation means 19, 20 that are manually controlled, i.e. handled by the operator who operates the frame 1.

[0056] The sequence for locking the shell and pillow on the frame thus involves the positioning of the shell on the frame 1, the locking of the respective corners with the angular abutments 4a, the arrangement of the supporting brackets 15 along the sides of the shell, the juxtaposition of the pillow on the shell in the frame, and the corresponding locking with the retention tab 16.

[0057] This sequence ensures an optimal arrangement of shell and pillow in order to be able to subject them to the subsequent sewing.

[0058] A specific high-efficiency and optimally-productive application of the present invention is the implementation of a machine 100 for sewing upper pillows on covering shells for mattresses, which comprises a supporting structure 101 for at least one retention frame 1 for upper pillows and covering shells for mattresses.

[0059] The frame 1, once arranged on the machine 100, will be associated with respective movement elements that are arranged on the structure 101.

[0060] The machine 100 will further comprise a guiding track 102 for at least one sewing head 103.

[0061] The sewing head 103 will in turn be able to perform a translational movement along the track 102 in a direction that is perpendicular to the movement direction of the frame 1 on the structure 101.

[0062] According to the invention, the machine 100 comprises a control and management unit 104 that is provided with at least one memory stage for storing data strings.

[0063] The stored data strings will relate to a plurality of predefined measurements of upper pillows and covering shells for mattresses and to parameters for sewing each single pillow on the shell.

[0064] It should be noted that the control and management unit 104 will further comprise a user interface, which in particular comprises a display screen 105 and a keypad 106, for entering and selecting the data strings.

[0065] The possibility is not excluded of connecting the unit 104 to a computer network and/or directly to a computer, using the keyboard and screen of a personal computer for entering and/or modifying data.

[0066] It should further be noted that specific elements for moving the frame 1 on the structure 101 and for moving a slider, which can move along the guiding track 102 and is integral with the sewing head 103, are controlled by the control and management unit 104.

[0067] It should conveniently be pointed out that the structure 101 will comprise positively a recess at the sewing head 103: such recess must allow the needle of the sewing head 103 to move to a level lower than that of the structure 101 itself (thus passing through the shell and the pillow that are placed on the frame 1 that is arranged on the structure 101) in order to complete each stitch via a respective abutment.

[0068] According to a particular embodiment of undoubted practical and applicative interest, the guiding track 102 can be arranged substantially at the centerline of the machine 100, and in such case the structure 101 will be constituted by a sliding surface of size adapted to the accommodation and movement of at least one frame 1: the elements for the movement of the frame 1 on the structure 101 will be of the type selected from among belts, preferably of the toothed type, gearwheels and racks and chains.

[0069] This construction choice is dictated by the necessity to precisely define the instantaneous position of the frame 1 at every moment: the presence of teeth (toothed belts, and gearwheels) or links (chains) enables a very precise movement of the frame 1 on the structure 101.

[0070] The movement elements will in turn be coupled to at least one respective actuation motor that is controlled, as explained previously, by the control and management unit 104. The coordinated movement of the frame 1 on the structure 101 and of the sewing head 103 along the track 102 makes it possible to provide lines and portions of stitching of any length, direction, and shape, optionally even with superimpositions thereof, which enable the creation di embroidery, patterns and the like.

[0071] Finally, it should be noted that the sewing head 103 will be functionally associated with a respective abutment that is controlled by it: such abutment will be adapted to the completion of the sewing operations (comprising thus the elements necessary for the formation of the single stitch, such as the crochet hook and the corresponding spool of thread).

[0072] With regard to the production of shells coupled to respective upper pillows with which to provide the upper covering of a mattress, it should be noted that the sewing operations will consist of a series of consecutive steps, which are listed briefly below.

[0073] Firstly it is necessary to arrange a covering shell for mattresses on the retention frame 1, the dimensions of which have previously been adjusted by way of the actuators 9 and 10 which are controlled by the control and management unit 104.

[0074] The shell must be locked with the bracket 15.

[0075] Subsequently a respective upper pillow will need to be juxtaposed with the covering shell that is accommodated in the frame 1, and will be retained in such position by way of the tab 16.

[0076] Such juxtaposition will be facilitated by the presence of the walls 2 of the frame 1 which will guide the insertion of the pillow, imposing the correct centering thereof with respect to the frame 1.

[0077] The frame 1 can thus be aligned with the sewing head 103 which will perform the coupling, by way of stitch lines, of the upper pillow and of the covering shell.

[0078] Advantageously the present invention solves the above mentioned problems, by providing a frame 1 for sewing upper pillows on covering shells for mattresses which is adapted to the automation of the operations for mutual juxtaposition of the two components that it is designed to contain.

[0079] Positively the frame 1 does not require intervention by operators for the change of format operations.

[0080] Conveniently the frame 1 makes it possible to increase the productivity of the machine 100 and/or plant in which it is installed.

[0081] Profitably the frame 1 makes it possible to obtain a juxtaposition with optimal alignment of the upper pillow with the respective shell in order to achieve a constant and high qualitative standard of the semi-finished products that it produces.

[0082] The invention, thus conceived, is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims. Moreover, all the details may be substituted by other, technically equivalent elements.

[0083] In the embodiments illustrated, individual characteristics shown in relation to specific examples may in reality be interchanged with other, different characteristics, existing in other embodiments.

[0084] In practice, the materials employed, as well as the dimensions, may be any according to requirements and to the state of the art.

[0085] Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly, such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.

Claims

1. A frame for sewing upper pillows on covering shells for mattresses, which comprises four perimetric walls (2); each wall (2) being perpendicular to the two contiguous walls (2) and comprising at least one laminar portion (3) that constitutes a resting surface, said laminar portion (3) being co-planar with a lower edge of said wall (2), at least one of said walls (2) comprising at least one locking element (4) for at least one component, selected from between an upper pillow and a covering shell, arranged on a respective laminar portion (3), characterized in that at least one of said walls (2) comprises at least two bands (5, 6) and (7, 8) that are mutually aligned and can slide with respect to each other in order to vary the overall length of the wall (2), between said at least two bands (5, 6) and (7, 8) of said wall (2) there being interposed a linear actuator (9, 10) for the controlled mutual sliding thereof, said actuator (9, 10) being adapted to be controlled by a respective control and management unit of a sewing machine (100) that is functionally associatable with said frame (1).

2. The frame according to claim 1, characterized in that said at least two bands (5, 6) and (7, 8) are coaxial, one at least partially inside the other, and are able to slide telescopically under the action of said actuator (9, 10) in order to vary the overall length of the respective wall (2).

3. The frame according to claim 1, characterized in that said walls (2) constituted by at least two bands (5, 6) and (7, 8) are four in number, at least two contiguous walls (2) comprising a respective actuator (9, 10) in order to vary the length and width of said frame (1).

4. The frame according to claim 3, characterized in that each wall (2) comprises a respective actuator (9, 10) in order to vary the length and width of said frame (1).

5. The frame according to claim 1, characterized in that said actuator (9, 10) is of the type selected from among a hydraulic cylinder, a pneumatic cylinder, a motor assembly (11, 13) and an endless screw (12, 14), a linear induction motor, an oscillating slot link, an apparatus provided with a rack and pinion, and the like.

6. The frame according to claim 1, characterized in that said locking element (4) comprises at least one angular abutment (4a) that can move from a first configuration, for the insertion of said shell in said frame (1), in which it is arranged substantially outside said walls (2), to a second configuration, for locking the corners of said shell, juxtaposed with the laminar resting portion (3) for said shell at the corners of said shell, the corners of the shell being aligned and accommodated in the corners of said frame (1).

7. The frame according to claim 1, characterized in that said locking element (4) comprises a bracket (15) that can move from a first configuration, for the insertion of said shell in said frame (1), in which it is arranged substantially outside said walls (2), to a second configuration, for locking said shell, juxtaposed with the laminar resting portion (3) for said shell.

8. The frame according to claim 1, characterized in that said locking element (4) comprises a retention tab (16) that can move from a first configuration, for the insertion of said pillow in said frame (1) above said shell, in which it is arranged substantially outside said walls (2), to a second configuration, for locking said pillow on said shell, juxtaposed with the laminar resting portion (3), said at least one laminar portion (3) constituting a resting surface that lies along the entire length of the respective wall (2), said laminar portions (3) of said walls (2) defining a lower resting border, which lies on the plane that contains the lower edge of said walls (2).

9. The frame according to one or more of the preceding claims, characterized in that said angular abutment (4a), said resting bracket (15) and said retention tab (16) are associated with said frame (1) by way of respective articulation elements (17, 18) which are controlled by specific actuation means (19, 20).

10. A machine for sewing upper pillows on covering shells for mattresses of the type comprising a supporting structure (101) for at least one retention frame (1) for upper pillows and covering shells for mattresses, which is associated with respective movement elements that are arranged on said structure (101), and a guiding track (102) for at least one sewing head (103), said sewing head (103) being able to perform a translational movement along said track (102) in a direction that is perpendicular to the movement direction of said frame (1) on said structure (101), characterized in that it comprises a control and management unit (104) provided with at least one memory stage for storing data strings relating to a plurality of predefined measurements of upper pillows and covering shells for mattresses and to parameters for sewing the pillow on the shell, which is associated with a user interface (105, 106) for entering and selecting said data strings, at least one wall (2) of said frame (1) comprising at least two bands (5, 6) and (7, 8) that are mutually aligned and can slide with respect to each other in order to vary the overall length of the wall (2), between said at least two bands (5, 6) and (7, 8) of said wall (2) there being interposed a linear actuator (9, 10) for mutual sliding, which is actuated by them and is controlled by said control and management unit (104).

11. The machine according to claim 10, characterized in that said movement elements and a slider, which can move along said guiding track (102) and is integral with said sewing head (103), are controlled by said control and management unit (104).

Ansprüche

1. Rahmen zum Nähen von Polsterauflagen auf Außenhüllen für Matratzen, der vier Umfassungswände (2) umfasst; wobei jede Wand (2) senkrecht zu den beiden angrenzenden Wänden (2) ausgebildet ist und mindestens einen flächigen Abschnitt (3) umfasst, der eine Auflagefläche bildet, wobei der flächige Abschnitt (3) zu einer Unterkante der Wand (2) koplanar ausgebildet ist, wobei mindestens eine der Wände (2) mindestens ein Arretierungselement (4) für mindestens eine Komponente, ausgewählt aus einer Polsterauflage und einer Außenhülle, umfasst, die auf einem entsprechenden flächigen Abschnitt (3) angeordnet ist/sind, dadurch gekennzeichnet, dass mindestens eine der Wände (2) mindestens zwei Leisten (5, 6) und (7, 8) umfasst, die miteinander fluchten und sich gegeneinander verschieben können, um die Gesamtlänge der Wand (2) zu verändern, wobei zwischen den mindestens zwei Leisten (5, 6) und (7, 8) der Wand (2) ein Linearaktuator (9, 10) für ihre kontrollierte gegenseitige Verschiebung eingesetzt ist, wobei der Aktuator (9, 10) dazu ausgebildet ist, dass er von einer entsprechenden Steuerungs- und Führungseinheit einer Nähmaschine (100) angesteuert wird, die dem Rahmen (1) funktional zuordenbar ist.

2. Rahmen nach Anspruch 1, dadurch gekennzeichnet, dass die mindestens zwei Leisten (5, 6) und (7, 8) koaxial ausgebildet sind, wobei eine mindestens abschnittsweise in der anderen angeordnet ist, und unter dem Einfluss des Aktuators (9, 10) teleskopartig verschiebbar sind, um die Gesamtlänge der entsprechenden Wand (2) zu verändern.

3. Rahmen nach Anspruch 1, dadurch gekennzeichnet, dass die Wände (2), die durch mindestens zwei Leisten (5, 6) und (7, 8) gebildet sind, in einer Anzahl von vier vorhanden sind, wobei mindestens zwei angrenzende Wände (2) einen entsprechenden Aktuator (9, 10) umfassen, um die Länge und Breite des Rahmens (1) zu verändern.

4. Rahmen nach Anspruch 3, dadurch gekennzeichnet, dass jede Wand (2) einen entsprechenden Aktuator (9, 10) umfasst, um die Länge und Breite des Rahmens (1) zu verändern.

5. Rahmen nach Anspruch 1, dadurch gekennzeichnet, dass der Aktuator (9, 10) von einem Typ ist, der aus einem Hydraulikzylinder, einem Pneumatikzylinder, einer Motorbaugruppe (11, 13) und einer Endlosschraube (12, 14), einem linearen Induktionsmotor, einem beweglichen Schlitzglied, einer Vorrichtung mit Zahnstangenantrieb und dergleichen ausgewählt ist.

6. Rahmen nach Anspruch 1, dadurch gekennzeichnet, dass das Arretierungselement (4) mindestens einen Winkelanschlag (4a) umfasst, der beweglich ist von einer ersten Stellung, zum Einführen der Hülle in den Rahmen (1), in der er im Wesentlichen außerhalb der Wände (2) angeordnet ist, in eine zweite Stellung, zum Festhalten der Ecken der Hülle, neben dem flächigen Auflageabschnitt (3) für die Hülle an den Ecken der Hülle, wobei die Ecken der Hülle in den Ecken des Rahmens (1) ausgerichtet und aufgenommen sind.

7. Rahmen nach Anspruch 1, dadurch gekennzeichnet, dass das Arretierungselement (4) einen Bügel (15) umfasst, der beweglich ist von einer ersten Stellung, zum Einführen der Hülle in den Rahmen (1), in der er im Wesentlichen außerhalb der Wände (2) angeordnet ist, in eine zweite Stellung, zum Festhalten der Hülle, neben dem flächigen Auflageabschnitt (3) für die Hülle.

8. Rahmen nach Anspruch 1, dadurch gekennzeichnet, dass das Arretierungselement (4) einen Haltestreifen (16) umfasst, der beweglich ist von einer ersten Stellung, zum Einführen des Polsters in den Rahmen (1) über der Hülle, in der er im Wesentlichen außerhalb der Wände (2) angeordnet ist, in eine zweite Stellung, zum Festhalten des Polsters auf der Hülle, neben dem flächigen Auflageabschnitt (3), wobei der mindestens eine flächige Abschnitt (3) eine Auflagefläche bildet, die entlang der gesamten Länge der entsprechenden Wand (2) liegt, wobei die flächigen Abschnitte (3) der Wände (2) einen unteren Auflagerand definieren, der in der Ebene liegt, die die Unterkante der Wände (2) enthält.

9. Rahmen nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Winkelanschlag (4a), der Auflagebügel (15) und der Haltestreifen (16) dem Rahmen (1) mittels entsprechender Gelenkelemente (17, 18) zugeordnet sind, die durch spezielle Betätigungsmittel (19, 20) angesteuert werden.

10. Maschine zum Nähen von Polsterauflagen auf Außenhüllen für Matratzen vom Typ umfassend eine Trägerstruktur (101) für mindestens einen Halterahmen (1) für Polsterauflagen und Außenhüllen für Matratzen, dem entsprechende Bewegungselemente zugeordnet sind, die auf der Struktur (101) angeordnet sind, und eine Führungsbahn (102) für mindestens einen Nähkopf (103), wobei der Nähkopf (103) dazu ausgebildet ist, dass er eine Translationsbewegung entlang der Bahn (102) in eine Richtung ausführt, die senkrecht ist zur Bewegungsrichtung des Rahmens (1) auf der Struktur (101), dadurch gekennzeichnet, dass sie eine Steuerungs- und Führungseinheit (104) umfasst, die mit mindestens einer Speichereinrichtung zum Speichern von Datenabfolgen, die eine Mehrzahl von vordefinierten Abmessungen von Polsterauflagen und Außenhüllen für Matratzen und Parameter zum Annähen des Polsters auf die Hülle betreffen, versehen ist, die einer Benutzerschnittstelle (105, 106) zum Eingeben und Auswählen der Datenabfolgen zugeordnet ist, wobei mindestens eine Wand (2) des Rahmens (1) mindestens zwei Leisten (5, 6) und (7, 8) umfasst, die miteinander fluchten und sich gegeneinander verschieben können, um die Gesamtlänge der Wand (2) zu verändern, wobei zwischen den mindestens zwei Leisten (5, 6) und (7, 8) der Wand (2) ein Linearaktuator (9, 10) für ihre gegenseitige Verschiebung eingesetzt ist, der von ihnen betätigt wird und von der Steuerungs- und Führungseinheit (104) angesteuert wird.

11. Maschine nach Anspruch 10, dadurch gekennzeichnet, dass die Bewegungselemente und ein Gleitstück, das sich entlang der Führungsbahn (102) bewegen kann und mit dem Nähkopf (103) integral ausgebildet ist, von der Steuerungs- und Führungseinheit (104) angesteuert werden.

Revendications

1. Châssis pour coudre des coussins supérieurs sur des coques de revêtement pour matelas, qui comprend quatre parois périmétrales (2), chaque paroi (2) étant perpendiculaire aux deux parois contiguës (2) et comprenant au moins une partie laminaire (3) qui constitue une surface d'appui, ladite partie laminaire (3) étant coplanaire avec un bord inférieur de ladite paroi (2), au moins l'une desdites parois (2) comprenant au moins un élément de blocage (4) pour le au moins un composant, choisi entre un coussin supérieur et une coque de revêtement, agencé sur une partie laminaire (3) respective, caractérisé en ce qu'au moins l'une desdites parois (2) comprend au moins deux bandes (5, 6) et (7, 8) qui sont mutuellement alignées et peuvent coulisser l'une par rapport à l'autre afin de modifier la longueur globale de la paroi (2), entre lesdites au moins deux bandes (5, 6) et (7, 8) de ladite paroi (2), on intercale un actionneur linéaire (9, 10) pour le coulissement mutuel contrôlé de ces dernières, ledit actionneur (9, 10) étant adapté pour être commandé par une unité de commande et de gestion respective d'une machine à coudre (100) qui peut être fonctionnellement associée audit châssis (1).

2. Châssis selon la revendication 1, caractérisé en ce que desdites au moins deux bandes (5, 6) et (7, 8) sont coaxiales, l'une au moins partiellement à l'intérieur de l'autre, et peuvent coulisser de manière télescopique, sous l'action dudit actionneur (9, 10) afin de modifier la longueur globale de la paroi (2) respective.

3. Châssis selon la revendication 1, caractérisé en ce que lesdites parois (2) constituées par au moins deux bandes (5, 6) et (7, 8) sont au nombre de quatre, au moins deux parois contiguës (2) comprenant un actionneur (9, 10) respectif afin de modifier la longueur et la largeur dudit châssis (1).

4. Châssis selon la revendication 3, caractérisé en ce que chaque paroi (2) comprend un actionneur (9, 10) respectif afin de modifier la longueur et la largeur dudit châssis (1).

5. Châssis selon la revendication 1, caractérisé en ce que ledit actionneur (9, 10) est du type choisi parmi un vérin hydraulique, un vérin pneumatique, un ensemble de moteur (11, 13) et une vis sans fin (12, 14), un moteur à induction linéaire, une liaison de fente oscillante, un appareil doté d'un mécanisme à crémaillère et similaire.

6. Châssis selon la revendication 1, caractérisé en ce que ledit élément de blocage (4) comprend au moins une butée angulaire (4a) qui peut passer d'une première configuration, pour l'insertion de ladite coque dans ledit châssis (1), dans laquelle elle est agencée sensiblement à l'extérieur desdites parois (2), à une seconde configuration, pour bloquer les coins de ladite coque, juxtaposés avec la partie d'appui laminaire (3) pour ladite coque au niveau des coins de ladite coque, les coins de ladite coque étant alignés et logés dans les coins dudit châssis (1).

7. Châssis selon la revendication 1, caractérisé en ce que ledit élément de blocage (4) comprend un support (15) qui peut passer d'une première configuration, pour l'insertion de ladite coque dans ledit châssis (1), dans laquelle elle est agencée sensiblement à l'extérieur desdites parois (2), à une seconde configuration, pour le blocage de ladite coque, juxtaposée avec la partie d'appui laminaire (3) pour ladite coque.

8. Châssis selon la revendication 1, caractérisé en ce que ledit élément de blocage (4) comprend une languette de retenue (16) qui peut passer d'une première configuration, pour l'insertion dudit coussin dans ledit châssis (1) au-dessus de ladite coque, dans laquelle elle est agencée sensiblement à l'extérieur desdites parois (2), à une seconde configuration, pour bloquer ledit coussin sur ladite coque, juxtaposée avec la partie d'appui laminaire (3), ladite au moins une partie laminaire (3) constituant une surface d'appui qui s'étend sur toute la longueur de la paroi (2) respective, lesdites parties laminaires (3) desdites parois (2) définissant une bordure d'appui inférieure, qui se trouve sur le plan qui contient le bord inférieur desdits parois (2).

9. Châssis selon une ou plusieurs des revendications précédentes, caractérisé en ce que ladite butée angulaire (4a), ledit support d'appui (15) et ladite languette de retenue (16) sont associés avec ledit châssis (1) au moyen d'éléments d'articulation (17, 18) respectifs qui sont commandés par des moyens d'actionnement (19, 20) spécifiques.

10. Machine pour coudre des coussins supérieurs sur des coques de revêtement pour matelas du type comprenant une structure de support (101) pour au moins un châssis de retenue (1) pour coussins supérieurs et coques de revêtement pour matelas, qui est associée avec des éléments de déplacement respectifs qui sont agencés sur ladite structure (101), et un rail de guidage (102) pour au moins une tête de couture (103), ladite tête de couture (103) pouvant réaliser un mouvement de translation le long dudit rail (102) dans une direction qui est perpendiculaire à la direction de déplacement dudit châssis (1) sur ladite structure (101), caractérisée en ce qu'elle comprend une unité de commande et de gestion (104) prévue avec au moins un stade de mémoire pour stocker des chaînes de données concernant une pluralité de mesures prédéfinies des coussins supérieurs et des coques de revêtement pour matelas et des paramètres pour coudre le coussin sur la coque, qui est associée avec une interface utilisateur (105, 106) pour entrer et sélectionner lesdites chaînes de données, au moins une paroi (2) dudit châssis (1) comprenant au moins deux bandes (5, 6) et (7, 8) qui sont mutuellement alignées et peuvent coulisser l'une par rapport à l'autre afin de modifier la longueur globale de la paroi (2), entre lesdites au moins deux bandes (5, 6) et (7, 8) de ladite paroi (2), on intercale un actionneur linaire (9, 10) pour le coulissement mutuel, qui est actionné par ces dernières et est commandé par ladite unité de commande et de gestion (104).

11. Machine selon la revendication 10, caractérisée en ce que lesdits éléments de déplacement et une glissière, qui peut se déplacer le long dudit rail de guidage (102) et est solidaire avec ladite tête de couture (103), sont commandés par ladite unité de commande et de gestion (104).

Drawing