EP2844110B1 - Mechanism for collapsible bunk-beds - Google Patents
Mechanism for collapsible bunk-beds Download PDFInfo
- Publication number
- EP2844110B1 EP2844110B1 EP13707871.3A EP13707871A EP2844110B1 EP 2844110 B1 EP2844110 B1 EP 2844110B1 EP 13707871 A EP13707871 A EP 13707871A EP 2844110 B1 EP2844110 B1 EP 2844110B1
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- European Patent Office
- Prior art keywords
- bed frame
- upper bed
- base
- frame
- mechanism according
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- 230000007246 mechanism Effects 0.000 title claims description 66
- 230000004888 barrier function Effects 0.000 claims description 40
- 230000000284 resting effect Effects 0.000 claims description 12
- 230000002787 reinforcement Effects 0.000 description 4
- 239000002023 wood Substances 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C19/00—Bedsteads
- A47C19/20—Multi-stage bedsteads; e.g. bunk beds; Bedsteads stackable to multi-stage bedsteads
- A47C19/205—Multi-stage bedsteads; e.g. bunk beds; Bedsteads stackable to multi-stage bedsteads convertible, e.g. from single bed or sofa
Definitions
- the present invention relates to a mechanism for collapsible bunk-beds and to a sofa bed comprising such mechanism.
- lever systems there are those which, in order to achieve the closing motion of the bunk-bed, entail the rotation through 180° of the upper bed frame.
- the lever systems comprise pivoting axes that can move on a horizontal plane toward the inside of the mechanism.
- lever systems that can move horizontally toward the inside of the bunk-bed can entail problems of interference with the mattress of the lower bed frame.
- locking systems are provided which prevent the upper bed frame, when it is in the raised position, from returning to the lowered position or in any case from changing its own stable position for use.
- BE 472 181 A discloses a double ottoman with upper and lower ottomans connected into an open-out condition and adapted for a lifting motion to two lateral supporting frames each comprising a pair of arms arranged in scissors fashion and connected to the lower ottoman so that the upper surfaces of the two ottomans will be brought to the same height.
- the aim of the present invention is to overcome the drawbacks of the background art, by devising a mechanism for collapsible bunk-beds that is particularly sturdy and easy to move.
- an object of the invention is to provide a movement mechanism for collapsible bunk-beds that is not interposed between the upper and lower bed frames.
- a further object of the invention is to provide a mechanism for collapsible bunk-beds that does not entail a rotation of the upper bed frame.
- Another object of the invention is to provide a mechanism for collapsible bunk-beds that uses an extremely limited number of levers while maintaining high structural stability.
- a further object of the present invention is to devise a mechanism for collapsible bunk-beds that can be used to obtain a sofa bed.
- a further object of the present invention is to provide a safety mechanism for collapsible bunk-beds which allows the user to lock the upper bed frame in position.
- an object of the invention is to render the safety mechanism activatable compulsorily by the user in order to be able to use the bunk-bed.
- Another object of the invention is to provide a safety mechanism that forces the user to assemble at least one longitudinal safety barrier of the upper bed frame in order to be able to use the bunk-bed.
- Another object of the present invention is to provide a mechanism for collapsible bunk-beds that avoids the need to have a removable ladder.
- Another object of the invention is to provide a mechanism for collapsible bunk-beds that is highly reliable, relatively easy to provide and at competitive costs.
- a mechanism for collapsible bunk-beds comprises a base 2 that is substantially shaped like a parallelepiped and is provided at its opposite sides with lateral sides 21 that connect a front part 22 and a rear part 26, so as to form a containment seat for a lower bed frame 4.
- the lateral sides 21 are such as to protrude vertically with respect to said containment seat and to the surface of the lower bed frame, so that they can be used conveniently both as barriers for the lateral containment of the mattress 43 and as frames in order to obtain the armrests of a sofa bed that uses the mechanism 1.
- the front part 22 comprises at least one pair of resting elements 24, for example brackets that are welded onto the front part 22 and protrude toward the inside of the containment seat formed in the base 2.
- the resting elements 24 are adapted to support the lower bed frame 4 in its raised position and the upper bed frame 3 in its collapsed position.
- the lower bed frame 4 can be constituted by a pair of crossmembers 41 and a pair of longitudinal members 42, so as to define a frame that is adapted to support a mattress 43, for example by means of wood slats of a known type which are connected like a bridge between the longitudinal members 42.
- the mechanism 1 comprises an upper bed frame 3, which is also defined by a pair of crossmembers 31 and a pair of longitudinal members 32 so as to define a frame suitable to support a mattress 33, for example by means of wood slats of a known type which are connected like a bridge between the longitudinal members 32.
- a front safety barrier 34 can be provided on at least one longitudinal member 32 and is preferably fixed detachably to said longitudinal member 32 for example by means of handwheels. Additional safety barriers 35, which are not necessarily removable and are useful to prevent the sliding of the mattress 33 on the surface of the upper bed frame 3, can be present on the crossmembers 31.
- the lateral sides 21 of the base 2 are connected to the crossmembers 31 of the upper bed frame by way of respective first lever systems 5, which are adapted to allow the movement of the upper bed frame 3 away and toward the base 2.
- Each one of the first lever systems 5 defines an articulated quadrilateral that lies on a plane that is substantially perpendicular to the plane of the upper bed frame 3.
- the articulated quadrilateral is preferably an articulated parallelogram 6, shown in broken lines in Figures 6a-6c , and has a hinge, obtained for example by means of a hinged joint 61, the pivoting axis of which coincides with the longitudinal axis of the upper bed frame 3 that passes substantially through the center of the crossmembers 31 of the upper bed frame 3.
- the articulated parallelogram 6 further has two additional hinges that are integral with the base 2 and are also obtained preferably by means of hinged joints 62 and 63.
- the fourth hinge of the articulated parallelogram 6, also preferably obtained by means of a hinged joint 64, is integral with the motion of the upper bed frame 3, and so is the hinged joint 61.
- a short side of the parallelogram 6 is defined between the joints in a fixed position with respect to the base 2, i.e., the joints 62 and 63, and is inclined with respect to the floor resting surface of the base 2 so as to define an acute angle toward the rear part 26 of the base 2, for example of approximately 60°.
- the joint 61 that is arranged on the upper bed frame 3 can approach the fixed joints 62 and 63, allowing the upper bed frame 3, in the collapsed position, to arrange itself substantially above the lower bed frame 4.
- the hinged joints 61, 62, 63 and 64 can be adapted to allow a mutual rotation of no more than approximately 90° between the levers that are connected thereto.
- Such levers are preferably four L-shaped levers 52-53 and 54-55 that are identical in pairs and are adapted to define a substantially rectangular shape and more preferably square shape when the upper bed frame 3 is in the fully raised position with respect to the base 2.
- a first L-shaped lever 52 is fixed rigidly to an inner side of the respective lateral side 21 of the base 2, and a second L-shaped lever 53 is fixed rigidly laterally to the upper bed frame 3, for example by a fixing angled element 533 that is fixed along the respective crossmember 31 so as to prevent relative rotation between the upper bed frame 3 and said second L-shaped lever 53.
- the L-shaped levers 52 and 53 are crossed by a diagonal of the substantially rectangular shape of the lever system 5, while the third L-shaped lever 54 and the fourth L-shaped lever 55 are crossed by the other diagonal of said substantially rectangular shape.
- the first and second L-shaped levers 52 and 53 each comprise two arms that are arranged at right angles to each other and have a substantially identical extension, 521-522 and 531-532 respectively, and are connected by a curved portion.
- the third and fourth L-shaped levers 54 and 55 also each comprise two arms 541-542 and 551-552 respectively, which are oriented at right angles to each other and have a substantially mutually identical extension that is greater than the extension of the arms 521-522 and 531-532 of the first and second L-shaped levers 52 and 53.
- the mutually pivoted arms are substantially perpendicular to each other when the upper bed frame 3 is in the collapsed position, as shown in Figure 6c , in which the first lever system 5 is interposed between the lateral side 21 of the base 2 and the crossmember 31.
- the third L-shaped lever 54 advantageously comprises a locking element to prevent the movement of the first lever system 5.
- Such locking element can be obtained by means of a lock 543 on the arm 541, which is provided with a bolt 544, which can move between an extended position, in which the bolt of 544 abuts above the lateral side 21 of the base 2, and a retracted position, in which the bolt 544 does not protrude transversely from the third L-shaped lever 54 and allows its rotation with respect to the first L-shaped lever 52.
- the bolt 544 can be moved by means of a removable key 546.
- a further locking element 553 can be provided between the first lever systems 5 and the upper bed frame 3, for example in the form of a bar 554 that can slide in a fork-shaped bracket 555 that is fixed below the arm 551 of the fourth L-shaped lever 55 so as to engage detachably below the respective crossmember 31.
- the arm 541 may further be connected to a gas cylinder actuator 23, for example by means of a plate 545 in a position that is substantially intermediate to the arm 541.
- the gas cylinder actuator 23 is connected, at its other end, to the rear part 26 or to the side 21, preferably in a point that is substantially aligned vertically with the articulation 62 and is close to the resting surface of the base 2, so as to facilitate the opening and closing movements of the upper bed frame 3.
- the first lever systems 5 can be connected rigidly to each other by transverse reinforcement bars, for example by a reinforcement bar 56 that is welded between the fourth L-shaped levers 65 at the arms 552.
- the reinforcement bar 56 if welded proximate to the articulations 62, can constitute advantageously a supporting element for the cushions of the back of the sofa bed that uses the mechanism 1 according to the invention.
- Each one of the L-shaped levers 52, 53, 54, 55 may further have angular reinforcement elements 57 that are arranged in a bridge-like fashion between the respective arms.
- the lower bed frame 4 of the mechanism according to the invention can also be liftable with respect to the base 2 by means of second lever systems 71 and 75.
- first lower lever 71 that has an end that is pivoted on a substantially intermediate point of a crossmember 41 of the lower bed frame 4 and the other end pivoted on the front part 22 of the base 2, for example on a vertical extension 25 of the bracket that constitutes the resting element 24.
- the two first lower levers 71 can have a bracket 73 in a substantially intermediate position, on which a rod 72 for connecting the two first lower levers 71 is fixed and is arranged below the lower bed frame 4.
- the bracket 72 can be connected by means of a spring 74 to the front part 22 of the base 2, preferably at a higher level than the pivoting point of the lever 71 on the vertical extension 25 of the resting element 24, so that the spring 74 arranges itself substantially parallel to the crossmembers 41 of the lower bed frame 4 when said frame is in the raised position, shown in Figures 1 and 7a .
- the corner ends of the crossmembers 41 on the opposite side with respect to the front part 22 are instead connected to second lower levers 75, each pivoted between one of said corner ends or a bracket that is integral therewith and the rear part 26 of the base 2, for example in a point substantially at the same height as the pivoting point of the first lower levers 71 on the front part 22 of the base 2.
- the second lower levers 75 also can be connected rigidly to each other by a connecting rod, which is welded onto the second lower levers 75 proximate to their pivoting point on the rear part 26 of the base 2.
- the lower bed frame 4 when the bunk-bed is to be collapsed, the lower bed frame 4 is raised at the longitudinal member 42 and, with a combined rotary and translational motion, the lower bed frame 4 in a position that is thus tilted is lowered with the rotation of the second lower levers 75 about their pivoting point on the rear part 26 of the base 2. The lower bed frame 4 is then pushed downward so as to make it abut in a substantially horizontal position with respect to the resting surface of the base 2.
- the locks 543 are then opened so that the bolts 544 no longer protrude transversely from the arm 541 of the third L-shaped lever 54, which can thus rotate freely about the hinged joint 63 with respect to the lateral sides 21.
- the bars 554 also can be disengaged, by translating them manually outwardly, so as to no longer abut under the respective crossmembers 31.
- the upper bed frame 3 is lowered manually, remaining substantially parallel to the resting surface of the base 2 and guided by the first lever systems 5 and by the gas cylinder actuator 23, until it abuts against the resting elements 24 provided on the front part 22 of the base 2.
- the opening movement of the bunk-bed instead follows the steps that are the opposite of the ones described above.
- the mechanism described above can be used in a sofa bed, by adding back cushions to the mechanism in the collapsed position shown in Figure 5 in order to obtain a sofa.
- the base 2 can comprise a supporting frame 600 that can rotate with respect to the base 2, in particular with respect to a longitudinal axis A thereof.
- Such supporting frame 600 can be pivoted to a front longitudinal member of the base 2 by means of two props 610 connected by a crossmember 620, which preferably has a longitudinal extension that is substantially equal to that of the longitudinal members 32 of the upper bed frame 3.
- the props 610 instead have an extension that is substantially equal to or greater than the difference in height, with respect to the plane of the base 2, between the pivoting axis A of the supporting frame 600 and the upper bed frame 3 when the latter is in the fully raised position.
- the corresponding crossmember 620 is at a height, with respect to the plane of the base 2, that is substantially equal to the height of the upper bed frame 3 and the props 610 consequently can be used to support frontally the weight that bears on the upper bed frame 3 and discharge it onto the base 2.
- the supporting frame 600 When instead the supporting frame 600 is in the lowered position, it lies above the lower bed frame 4, more precisely above the mattress 43 arranged on the lower bed frame 4, so as to be visible when the upper bed frame 3 is moved to the raised position.
- a ladder 670 is defined that moves rigidly together with the supporting frame 600.
- One of the stringers of the ladder 670 can be one of the props 610, while the other stringer of the ladder 670 is fixed to the crossmember 620 at one end and is pivoted at the other end along the same pivoting axis A as the supporting frame 600.
- the rungs of the ladder 670 are thus fixed to these two uprights, for example by welding.
- An assembly 640 for locking the movement of the upper bed frame 3 is provided on the crossmember 620 of the supporting frame 600 and is adapted to interact with the front longitudinal member 32 of the upper bed frame 3 when the supporting frame 600 is in the raised position, in order to maintain this position and allow the discharge of the weight onto the base 2.
- This locking assembly 640 can be obtained by means of at least one bolt coupled to the crossmember 620.
- the bolt interacts with suitable abutments 660 that are fixed rigidly to the upper bed frame 3, for example to the longitudinal member 32.
- a safety barrier 630 can be pivoted to the crossmember 620 of the supporting frame 600 and can rotate between an inactive position, in which the safety barrier can rotate freely with respect to the supporting frame 600, and a safety position, in which the barrier 630 is external to the perimeter of the supporting frame 600 and lies in a locked condition on a plane that is substantially perpendicular to the plane of the upper bed frame 3. In the safety position, the rotation of the safety barrier 630 is locked.
- the safety barrier 630 can integrate the locking assembly 640.
- bolts 650 are fixed rigidly to the safety barrier 630 substantially at the pivoting axis of the safety barrier on the cross-member 620 of the supporting frame 600.
- each bolt 650 is oriented substantially parallel to the cross-member 620 of the supporting frame 600.
- each bolt 650 can be fixed to one of the two arms of a fork that is fitted rotatably on the crossmember 620, the other arm of the fork being fixed to the safety barrier 630.
- the safety barrier 630 can further slide along the crossmember 620 so that when the safety barrier 630 slides the bolts 650 engage the corresponding abutments 660, for example tubular elements, that are fixed on the longitudinal member 32 of the upper bed frame 3.
- a safety lock 680 which can be operated by means of a removable key and prevents, once actuated, the sliding of the safety barrier 630 along the crossmember 620.
- the lock 680 for example, can interact with an abutment 690 that protrudes from the cross member 620 of the supporting frame 600.
- said abutment can be provided on the longitudinal member 32 of the upper bed frame 3.
- the spring latch 700 adapted to engage automatically the upper bed frame 3 by means of a spring that is loaded toward said upper bed frame, in order to prevent the supporting frame 600 from falling during the operations for moving the safety barrier 630.
- the spring latch 700 can be deactivated by pulling manually an eyelet that is integral with the spring latch. In order to maximize the safety of the structure, however, it is preferable to avoid the use of the spring latch 700.
- the safety barrier 630 is then made to rotate further so as to move it to the safety position. In this position, the bolts 650 are aligned with respect to the corresponding eyelets 660 of the upper bed frame 3. Finally, the user pushes the safety barrier 630 so as to make it slide with respect to the crossmember 620 of the supporting frame 600 and insert the bolts 650 in the eyelets 660.
- the frame 600 therefore, can support the weight of the upper bed while remaining locked in position. In this position, the user can use the ladder 670 that is integrated in the supporting frame 600.
- the safety barrier 630 is translated along the crossmember 620 so as to move the bolts 650 away from the eyelets 660 and the entire supporting frame 600 is finally accompanied by the user until it lies on the mattress 43 of the lower bed frame 4.
- closure of the bunk-bed is achieved with the upper bed frame which always remains substantially parallel to the floor and by using lever systems that can move exclusively on substantially vertical planes, interposed advantageously between the lateral sides of the base and the crossmembers of the upper and lower bed frames.
- the safety mechanism according to the invention which can be used with the described mechanism for collapsible bunk-beds but also with other mechanisms adapted to collapse bunk-beds, in fact must be considered by the user, since in addition to being clearly visible because it lies on the mattress of the lower bed it prevents the user from accessing the lower bed. Moreover, thanks to the integrated ladder, access to the upper bed is prevented if the safety mechanism is not activated.
- the safety mechanism according to the invention prevents the user from having to remember to assemble such barrier before lying on the upper bed.
- the materials used, as well as the dimensions may be any according to the requirements and to the state of the art.
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Description
- The present invention relates to a mechanism for collapsible bunk-beds and to a sofa bed comprising such mechanism.
- To allow the closing or opening of a mechanism for bunk-beds, it is known to use lever systems connected between the frame of the upper bed and the fixed base of the mechanism.
- Among known lever systems there are those which, in order to achieve the closing motion of the bunk-bed, entail the rotation through 180° of the upper bed frame.
- In other solutions, instead, the lever systems comprise pivoting axes that can move on a horizontal plane toward the inside of the mechanism.
- These known mechanisms are not devoid of drawbacks, among which mention must be made of the fact that the 180° rotation of the upper bed frame entails the use of straps in order to keep the mattress integral with the upper bed frame during rotation.
- Moreover, the lever systems that can move horizontally toward the inside of the bunk-bed can entail problems of interference with the mattress of the lower bed frame.
- Besides, in mechanisms of the known type in general there can be stability problems.
- To ensure the safety of the user, locking systems are provided which prevent the upper bed frame, when it is in the raised position, from returning to the lowered position or in any case from changing its own stable position for use.
- These known locking systems are not devoid of drawbacks, among which mention must be made of the fact that they are typically suitable only for the specific lever system used to lift and close the mechanism of the bunk-bed.
- Moreover, known locking systems run the risk of being difficult to identify by the user, who for this reason may forget to activate them before lying for example on the lower bed.
- Another drawback of known safety mechanisms is constituted by the barriers provided longitudinally on the upper bed frame, which are needed to prevent the accidental fall of the user from the upper bed while sleeping. Such known safety barriers are typically awkward to apply, particularly when the mechanism of the collapsible bunk-bed is used in a sofa bed, since in the closed configuration of the bunk-bed they have to be removed in order to be able to use the sofa or they have to be folded onto the upper bed frame under the corresponding mattress. Such known solutions, besides awkwardness in use, have less than optimum safety, since the user can in any case use the upper bed without assembling or raising the corresponding longitudinal safety barriers.
- Another drawback of known bunk-bed mechanisms is that in addition to safety sides, in order to reach the closed position of the bunk-bed mechanism it is necessary to remove the ladder that is used to access the upper bed.
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BE 472 181 A - The aim of the present invention is to overcome the drawbacks of the background art, by devising a mechanism for collapsible bunk-beds that is particularly sturdy and easy to move.
- Within this aim, an object of the invention is to provide a movement mechanism for collapsible bunk-beds that is not interposed between the upper and lower bed frames.
- A further object of the invention is to provide a mechanism for collapsible bunk-beds that does not entail a rotation of the upper bed frame.
- Another object of the invention is to provide a mechanism for collapsible bunk-beds that uses an extremely limited number of levers while maintaining high structural stability.
- Moreover, a further object of the present invention is to devise a mechanism for collapsible bunk-beds that can be used to obtain a sofa bed.
- A further object of the present invention is to provide a safety mechanism for collapsible bunk-beds which allows the user to lock the upper bed frame in position.
- Within this aim, an object of the invention is to render the safety mechanism activatable compulsorily by the user in order to be able to use the bunk-bed.
- Another object of the invention is to provide a safety mechanism that forces the user to assemble at least one longitudinal safety barrier of the upper bed frame in order to be able to use the bunk-bed.
- Another object of the present invention is to provide a mechanism for collapsible bunk-beds that avoids the need to have a removable ladder.
- Another object of the invention is to provide a mechanism for collapsible bunk-beds that is highly reliable, relatively easy to provide and at competitive costs.
- In accordance with the invention, there is provided a mechanism for collapsible bunk-beds as defined in the appended claims.
- Further characteristics and advantages of the invention will become better apparent from the description of preferred but not exclusive embodiments of the mechanism according to the invention, illustrated by way of nonlimiting example in the accompanying drawings, wherein:
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Figure 1 is a perspective view of a mechanism according to the invention in a fully open position; -
Figure 1a is a detail view of a locking element ofFigure 1 ; -
Figure 1b is a detail view of another locking element ofFigure 1 ; -
Figure 2 is a view of the lowering movement of the lower bed frame; -
Figure 3 is a view of the mechanism ofFigure 1 , in which the lower bed frame has been lowered completely; -
Figure 4 is a view of an intermediate position of the upper bed frame during closure; -
Figure 5 is a view of the mechanism ofFigure 1 in the fully collapsed position; -
Figures 6a-6c are views of three positions of one of the lever systems for moving the upper bed frame; -
Figures 7a-7c are detail side views of the lever system for the movement of the lower bed frame, respectively in the three raised, inclined and lowered positions; -
Figure 8 is a view of a mechanism for bunk-beds according to the invention in the raised position; -
Figures 9a and 9b are views of the two positions of the safety lock; -
Figure 10 is a view of the sliding motion of the safety barrier used in the mechanism ofFigure 8 ; -
Figure 11 is a view of the tilting motion of the safety barrier used in the mechanism ofFigure 8 ; -
Figure 12 is a view of the tilting motion of the supporting frame used in the mechanism ofFigure 8 . - With reference to the figures, a mechanism for collapsible bunk-beds according to the invention, generally designated by the reference numeral 1, comprises a
base 2 that is substantially shaped like a parallelepiped and is provided at its opposite sides withlateral sides 21 that connect afront part 22 and arear part 26, so as to form a containment seat for alower bed frame 4. Thelateral sides 21 are such as to protrude vertically with respect to said containment seat and to the surface of the lower bed frame, so that they can be used conveniently both as barriers for the lateral containment of themattress 43 and as frames in order to obtain the armrests of a sofa bed that uses the mechanism 1. - Moreover, the
front part 22 comprises at least one pair ofresting elements 24, for example brackets that are welded onto thefront part 22 and protrude toward the inside of the containment seat formed in thebase 2. Theresting elements 24 are adapted to support thelower bed frame 4 in its raised position and theupper bed frame 3 in its collapsed position. - The
lower bed frame 4 can be constituted by a pair ofcrossmembers 41 and a pair oflongitudinal members 42, so as to define a frame that is adapted to support amattress 43, for example by means of wood slats of a known type which are connected like a bridge between thelongitudinal members 42. - Moreover, the mechanism 1 comprises an
upper bed frame 3, which is also defined by a pair ofcrossmembers 31 and a pair oflongitudinal members 32 so as to define a frame suitable to support amattress 33, for example by means of wood slats of a known type which are connected like a bridge between thelongitudinal members 32. - A
front safety barrier 34 can be provided on at least onelongitudinal member 32 and is preferably fixed detachably to saidlongitudinal member 32 for example by means of handwheels.Additional safety barriers 35, which are not necessarily removable and are useful to prevent the sliding of themattress 33 on the surface of theupper bed frame 3, can be present on thecrossmembers 31. - The
lateral sides 21 of thebase 2 are connected to thecrossmembers 31 of the upper bed frame by way of respectivefirst lever systems 5, which are adapted to allow the movement of theupper bed frame 3 away and toward thebase 2. Each one of thefirst lever systems 5 defines an articulated quadrilateral that lies on a plane that is substantially perpendicular to the plane of theupper bed frame 3. - The articulated quadrilateral is preferably an articulated parallelogram 6, shown in broken lines in
Figures 6a-6c , and has a hinge, obtained for example by means of ahinged joint 61, the pivoting axis of which coincides with the longitudinal axis of theupper bed frame 3 that passes substantially through the center of thecrossmembers 31 of theupper bed frame 3. The articulated parallelogram 6 further has two additional hinges that are integral with thebase 2 and are also obtained preferably by means of hingedjoints hinged joint 64, is integral with the motion of theupper bed frame 3, and so is thehinged joint 61. - A short side of the parallelogram 6 is defined between the joints in a fixed position with respect to the
base 2, i.e., thejoints base 2 so as to define an acute angle toward therear part 26 of thebase 2, for example of approximately 60°. In this manner, with the closing motion of the bunk-bed, thejoint 61 that is arranged on theupper bed frame 3 can approach thefixed joints upper bed frame 3, in the collapsed position, to arrange itself substantially above thelower bed frame 4. - The hinged
joints upper bed frame 3 is in the fully raised position with respect to thebase 2. - A first L-
shaped lever 52 is fixed rigidly to an inner side of the respectivelateral side 21 of thebase 2, and a second L-shaped lever 53 is fixed rigidly laterally to theupper bed frame 3, for example by a fixingangled element 533 that is fixed along therespective crossmember 31 so as to prevent relative rotation between theupper bed frame 3 and said second L-shaped lever 53. The L-shaped levers lever system 5, while the third L-shaped lever 54 and the fourth L-shaped lever 55 are crossed by the other diagonal of said substantially rectangular shape. - A rotation of the
upper bed frame 3 about itself during its opening and closing movements is prevented with the structure described above. - The first and second L-shaped
levers levers levers - The mutually pivoted arms are substantially perpendicular to each other when the
upper bed frame 3 is in the collapsed position, as shown inFigure 6c , in which thefirst lever system 5 is interposed between thelateral side 21 of thebase 2 and thecrossmember 31. - The third L-shaped
lever 54 advantageously comprises a locking element to prevent the movement of thefirst lever system 5. Such locking element can be obtained by means of alock 543 on thearm 541, which is provided with abolt 544, which can move between an extended position, in which the bolt of 544 abuts above thelateral side 21 of thebase 2, and a retracted position, in which thebolt 544 does not protrude transversely from the third L-shapedlever 54 and allows its rotation with respect to the first L-shapedlever 52. Thebolt 544 can be moved by means of aremovable key 546. - A
further locking element 553 can be provided between thefirst lever systems 5 and theupper bed frame 3, for example in the form of abar 554 that can slide in a fork-shapedbracket 555 that is fixed below thearm 551 of the fourth L-shapedlever 55 so as to engage detachably below therespective crossmember 31. - The
arm 541 may further be connected to agas cylinder actuator 23, for example by means of aplate 545 in a position that is substantially intermediate to thearm 541. Thegas cylinder actuator 23 is connected, at its other end, to therear part 26 or to theside 21, preferably in a point that is substantially aligned vertically with thearticulation 62 and is close to the resting surface of thebase 2, so as to facilitate the opening and closing movements of theupper bed frame 3. - As an alternative to the
gas cylinder actuator 23 it is possible to use a motorized actuator. - Advantageously, the
first lever systems 5 can be connected rigidly to each other by transverse reinforcement bars, for example by areinforcement bar 56 that is welded between the fourth L-shaped levers 65 at thearms 552. Thereinforcement bar 56, if welded proximate to thearticulations 62, can constitute advantageously a supporting element for the cushions of the back of the sofa bed that uses the mechanism 1 according to the invention. - Each one of the L-shaped
levers angular reinforcement elements 57 that are arranged in a bridge-like fashion between the respective arms. - The
lower bed frame 4 of the mechanism according to the invention can also be liftable with respect to thebase 2 by means ofsecond lever systems - In particular, on each one of the opposite longitudinal ends of the
lower bed frame 4 it is possible to provide a firstlower lever 71 that has an end that is pivoted on a substantially intermediate point of acrossmember 41 of thelower bed frame 4 and the other end pivoted on thefront part 22 of thebase 2, for example on avertical extension 25 of the bracket that constitutes the restingelement 24. - The two first
lower levers 71 can have abracket 73 in a substantially intermediate position, on which arod 72 for connecting the two firstlower levers 71 is fixed and is arranged below thelower bed frame 4. Thebracket 72 can be connected by means of aspring 74 to thefront part 22 of thebase 2, preferably at a higher level than the pivoting point of thelever 71 on thevertical extension 25 of the restingelement 24, so that thespring 74 arranges itself substantially parallel to thecrossmembers 41 of thelower bed frame 4 when said frame is in the raised position, shown inFigures 1 and7a . - The corner ends of the
crossmembers 41 on the opposite side with respect to thefront part 22 are instead connected to secondlower levers 75, each pivoted between one of said corner ends or a bracket that is integral therewith and therear part 26 of thebase 2, for example in a point substantially at the same height as the pivoting point of the firstlower levers 71 on thefront part 22 of thebase 2. The secondlower levers 75 also can be connected rigidly to each other by a connecting rod, which is welded onto the secondlower levers 75 proximate to their pivoting point on therear part 26 of thebase 2. - Operation of the invention is evident from the embodiment described above.
- In particular, considering the initial situation of
Figure 1 , when the bunk-bed is to be collapsed, thelower bed frame 4 is raised at thelongitudinal member 42 and, with a combined rotary and translational motion, thelower bed frame 4 in a position that is thus tilted is lowered with the rotation of the secondlower levers 75 about their pivoting point on therear part 26 of thebase 2. Thelower bed frame 4 is then pushed downward so as to make it abut in a substantially horizontal position with respect to the resting surface of thebase 2. - By means of the key 546, the
locks 543 are then opened so that thebolts 544 no longer protrude transversely from thearm 541 of the third L-shapedlever 54, which can thus rotate freely about the hinged joint 63 with respect to the lateral sides 21. Thebars 554 also can be disengaged, by translating them manually outwardly, so as to no longer abut under therespective crossmembers 31. By applying a downward force to theupper bed frame 3, as shown inFigure 3 , theupper bed frame 3 is lowered manually, remaining substantially parallel to the resting surface of thebase 2 and guided by thefirst lever systems 5 and by thegas cylinder actuator 23, until it abuts against the restingelements 24 provided on thefront part 22 of thebase 2. - The opening movement of the bunk-bed instead follows the steps that are the opposite of the ones described above.
- Advantageously, the mechanism described above can be used in a sofa bed, by adding back cushions to the mechanism in the collapsed position shown in
Figure 5 in order to obtain a sofa. - According to another aspect of the invention, shown in
Figures 8 to 12 in the particular, but not necessary, use in combination with the mechanism 1 described earlier, thebase 2 can comprise a supportingframe 600 that can rotate with respect to thebase 2, in particular with respect to a longitudinal axis A thereof. Such supportingframe 600 can be pivoted to a front longitudinal member of thebase 2 by means of twoprops 610 connected by acrossmember 620, which preferably has a longitudinal extension that is substantially equal to that of thelongitudinal members 32 of theupper bed frame 3. Theprops 610 instead have an extension that is substantially equal to or greater than the difference in height, with respect to the plane of thebase 2, between the pivoting axis A of the supportingframe 600 and theupper bed frame 3 when the latter is in the fully raised position. - In this manner, when the supporting
frame 600 is in the raised position, thecorresponding crossmember 620 is at a height, with respect to the plane of thebase 2, that is substantially equal to the height of theupper bed frame 3 and theprops 610 consequently can be used to support frontally the weight that bears on theupper bed frame 3 and discharge it onto thebase 2. - When instead the supporting
frame 600 is in the lowered position, it lies above thelower bed frame 4, more precisely above themattress 43 arranged on thelower bed frame 4, so as to be visible when theupper bed frame 3 is moved to the raised position. - Advantageously, on the supporting frame 600 a
ladder 670 is defined that moves rigidly together with the supportingframe 600. One of the stringers of theladder 670 can be one of theprops 610, while the other stringer of theladder 670 is fixed to thecrossmember 620 at one end and is pivoted at the other end along the same pivoting axis A as the supportingframe 600. The rungs of theladder 670 are thus fixed to these two uprights, for example by welding. - An
assembly 640 for locking the movement of theupper bed frame 3 is provided on thecrossmember 620 of the supportingframe 600 and is adapted to interact with the frontlongitudinal member 32 of theupper bed frame 3 when the supportingframe 600 is in the raised position, in order to maintain this position and allow the discharge of the weight onto thebase 2. - This locking
assembly 640 can be obtained by means of at least one bolt coupled to thecrossmember 620. To achieve locking, the bolt interacts withsuitable abutments 660 that are fixed rigidly to theupper bed frame 3, for example to thelongitudinal member 32. - A
safety barrier 630 can be pivoted to thecrossmember 620 of the supportingframe 600 and can rotate between an inactive position, in which the safety barrier can rotate freely with respect to the supportingframe 600, and a safety position, in which thebarrier 630 is external to the perimeter of the supportingframe 600 and lies in a locked condition on a plane that is substantially perpendicular to the plane of theupper bed frame 3. In the safety position, the rotation of thesafety barrier 630 is locked. - Advantageously, the
safety barrier 630 can integrate the lockingassembly 640. In particular,bolts 650 are fixed rigidly to thesafety barrier 630 substantially at the pivoting axis of the safety barrier on thecross-member 620 of the supportingframe 600. - In this manner, by means of the rotation of the
safety barrier 630 from the inactive position to the safety position, it is possible to achieve not only the locking of the supportingframe 600 on theupper bed frame 3 but also the locking of the rotation of thesafety barrier 630 with respect to thecrossmember 620. - In the particular illustrated embodiment, the
bolts 650 are oriented substantially parallel to thecross-member 620 of the supportingframe 600. For example, eachbolt 650 can be fixed to one of the two arms of a fork that is fitted rotatably on thecrossmember 620, the other arm of the fork being fixed to thesafety barrier 630. - The
safety barrier 630 can further slide along thecrossmember 620 so that when thesafety barrier 630 slides thebolts 650 engage the correspondingabutments 660, for example tubular elements, that are fixed on thelongitudinal member 32 of theupper bed frame 3. - Optionally, in order to avoid inadvertently releasing the
safety barrier 630, it is possible to provide asafety lock 680, which can be operated by means of a removable key and prevents, once actuated, the sliding of thesafety barrier 630 along thecrossmember 620. Thelock 680, for example, can interact with anabutment 690 that protrudes from thecross member 620 of the supportingframe 600. As an alternative, said abutment can be provided on thelongitudinal member 32 of theupper bed frame 3. - Optionally, it is possible to provide on the
crossmember 620 of the supportingframe 600 at least onespring latch 700 adapted to engage automatically theupper bed frame 3 by means of a spring that is loaded toward said upper bed frame, in order to prevent the supportingframe 600 from falling during the operations for moving thesafety barrier 630. Thespring latch 700 can be deactivated by pulling manually an eyelet that is integral with the spring latch. In order to maximize the safety of the structure, however, it is preferable to avoid the use of thespring latch 700. - Operation of the safety mechanism according to the invention is evident from the embodiment that has just been described. In particular, when the
upper bed frame 3 is moved by the user to the raised position, the supportingframe 600 becomes visible and therefore is raised by the user, for example by gripping thesafety barrier 630. The supportingframe 600 is then rotated with respect to thebase 2 until it reaches the raised position. This position can optionally be defined by an angular stroke limit. - The
safety barrier 630 is then made to rotate further so as to move it to the safety position. In this position, thebolts 650 are aligned with respect to the correspondingeyelets 660 of theupper bed frame 3. Finally, the user pushes thesafety barrier 630 so as to make it slide with respect to thecrossmember 620 of the supportingframe 600 and insert thebolts 650 in theeyelets 660. - The
frame 600, therefore, can support the weight of the upper bed while remaining locked in position. In this position, the user can use theladder 670 that is integrated in the supportingframe 600. - When the bunk-bed is to be closed, the
safety barrier 630 is translated along thecrossmember 620 so as to move thebolts 650 away from theeyelets 660 and the entire supportingframe 600 is finally accompanied by the user until it lies on themattress 43 of thelower bed frame 4. - In practice it has been found that the mechanism for collapsible bunk-beds according to the invention achieves fully the intended aim, since it allows to have a rigid and safe structure with a very limited number of components.
- Moreover, closure of the bunk-bed is achieved with the upper bed frame which always remains substantially parallel to the floor and by using lever systems that can move exclusively on substantially vertical planes, interposed advantageously between the lateral sides of the base and the crossmembers of the upper and lower bed frames.
- Moreover, safety can be increased. The safety mechanism according to the invention, which can be used with the described mechanism for collapsible bunk-beds but also with other mechanisms adapted to collapse bunk-beds, in fact must be considered by the user, since in addition to being clearly visible because it lies on the mattress of the lower bed it prevents the user from accessing the lower bed. Moreover, thanks to the integrated ladder, access to the upper bed is prevented if the safety mechanism is not activated.
- Moreover, thanks to the fact that a safety barrier is integrated, the safety mechanism according to the invention prevents the user from having to remember to assemble such barrier before lying on the upper bed.
- The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims; all the details may further be replaced with other technically equivalent elements.
- In practice, the materials used, as well as the dimensions, may be any according to the requirements and to the state of the art.
Claims (18)
- A mechanism (1) for collapsible bunk-beds, comprising a base (2) and an upper bed frame (3) which are connected, on opposite sides, by a pair of first lever systems (5) adapted to allow the movement of the upper bed frame (3) between two stable positions above the base (2), the upper bed frame being adapted to support a mattress (33), each one of said first lever systems (5) comprising an articulated quadrilateral (6) that lies on a plane that is substantially perpendicular to the plane of said upper bed frame (3), characterised in that said articulated quadrilateral being an articulated parallelogram (6) and being composed of four L-shaped levers that are identical in pairs (52, 53, 54, 55) and are adapted to define a substantially rectangular shape when the upper bed frame (3) is in the fully raised position with respect to said base (2),
a first L-shaped lever (52) of said L-shaped levers being fixed rigidly to the base (2) and a second L-shaped lever (53) of said L-shaped levers being fixed rigidly to the upper bed frame (3), said first and second L-shaped levers (52, 53) being crossed by a diagonal of said substantially rectangular shape, third and fourth L-shaped levers (54, 55) of said L-shaped levers being crossed by the other diagonal of said substantially rectangular shape,
each one of said first and second L-shaped levers (52, 53) comprising two arms (521, 522; 531, 532) that are substantially mutually perpendicular and each one of said third and fourth L-shaped levers (54, 55) comprising two arms (531, 532; 541, 542) which are substantially perpendicular to each other and are longer than the length of the arms (521, 522; 531, 532) of the first and second L-shaped levers (52, 53), wherein the mutually pivoted arms are substantially perpendicular to each other when the upper bed frame (3) is in the fully collapsed position. - The mechanism according to claim 1, characterized in that said articulated quadrilateral (6) comprises a hinge (61) on a longitudinal axis of said upper bed frame (3) and two hinges (62, 63) on said base (2).
- The mechanism according to claim 2, characterized in that said longitudinal axis of said upper bed frame passes through a substantially central point of the crossmembers (31) of said upper bed frame (3).
- The mechanism according to one or more of the preceding claims, characterized in that the third L-shaped lever (54) pivoted to said base comprises a locking element (543) to prevent the movement of said first lever system (5) with respect to a lateral side (21) of said base (2), said fourth L-shaped lever (55) optionally comprising a second locking element (553).
- The mechanism according to one or more of the preceding claims, further comprising a lower bed frame (4) that is adapted to support a mattress (43), said lower bed frame (4) being arranged below the upper bed frame (3) and being movable with respect to the base (2) between a raised position and a lowered position, by means of second lever systems (7) that are connected between said base (2) and crossmembers (42) of said lower bed frame (4), said second lever systems (7) being able to rotate on planes that are substantially perpendicular to the plane of said lower bed frame (4).
- The mechanism according to claim 5, characterized in that said base (2) is substantially shaped like a parallelepiped such as to define a containment seat in order to accommodate completely the lower bed frame (4) in the lowered position, said base (2) comprising, at each side on which said first lever system (5) is pivoted, a lateral side (21) that protrudes above said containment seat of the lower bed frame (4) and which is laterally adjacent to said upper bed frame (3) in the collapsed position.
- The mechanism according to one or more of claims 5 and 6, characterized in that said base (2) comprises at least one resting element (24) on a front part (22) that is substantially perpendicular to the sides of the base (2) where the first lever systems (5) are connected, said at least one resting element (24) being adapted to support said lower bed frame (4) in its raised position and said upper bed frame (3) in its fully collapsed position.
- The mechanism according to one or more of claims 5 to 7, further comprising a safety mechanism that comprises a supporting frame (600) that is connected to said base (2) and that can rotate with respect to a longitudinal axis of said base (2) between an inactive position, in which the supporting frame (600) lies substantially above the lower bed frame (4), and a raised position, in which the supporting frame (600) engages the upper bed frame (3) so as to support its weight along a longitudinal member (32) of said upper bed frame (3), said supporting frame (600) comprising a locking assembly (640) that is adapted to fix detachably said supporting frame (600) to said upper bed frame (3).
- The mechanism according to claim 8, characterized in that said supporting frame (600) is pivoted to the base (2) by means of two props (610) connected by a crossmember (620), which has a longitudinal extension that is substantially equal to that of the longitudinal member (32) of the upper bed frame (3), said props (610) having such an extension as to allow the crossmember (620) to be at a height, with respect to the resting surface of the base (2), that is substantially equal to the height of the upper bed frame (3) when the supporting frame (600) is in said raised position.
- The mechanism according to one or more of claims 8 and 9, characterized in that the locking assembly (640) comprises at least one bolt (650) that is coupled to the crossmember (620) of the supporting frame (600), said upper bed frame (3) comprising abutments (660) adapted to mate with said at least one bolt (650) in order to fix detachably said supporting frame (600) to said upper bed frame (3).
- The mechanism according to one or more of claims 8-10, characterized in that a safety barrier (630) is pivoted on the crossmember (620) of the supporting frame (600), said safety barrier (630) being able to rotate between an inactive position, in which the safety barrier can rotate freely with respect to said supporting frame (600), and a safety position, in which the barrier (630) is locked with respect to the supporting frame (600) and lies on a plane that is substantially perpendicular to the plane of the upper bed frame (3).
- The mechanism according to claim 11, characterized in that the safety barrier (630) comprises said locking assembly (640).
- The mechanism according to claim 12, characterized in that said locking assembly (640) comprises said at least one bolt (650), which is fixed rigidly to the safety barrier (630) substantially at the pivoting axis of the safety barrier (630) on the crossmember (620) of the supporting frame (600).
- The mechanism according to claim 13, characterized in that said at least one bolt (650) is directed substantially parallel to the crossmember (620) of the supporting frame (600) and the safety barrier (630) can also slide along said crossmember (620) so that when the safety barrier (630) slides along the crossmember (620) said at least one bolt (650) engages said upper bed frame (3) in order to fix detachably said supporting frame (600) to said upper bed frame (3).
- The mechanism according to claim 14, characterized in that said safety barrier (630) further comprises a lock (680) to prevent or allow said sliding.
- The mechanism according to one or more of claims 8-15, characterized in that a ladder (670) is defined on the supporting frame (600) and can move integrally with the supporting frame (600).
- The mechanism according to one or more of claims 8-16, characterized in that said supporting frame (600) comprises at least one spring latch (700) that is adapted to engage with said upper bed frame (3).
- A sofa bed, characterized in that it comprises the mechanism (1) according to one or more of the preceding claims.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL13707871T PL2844110T3 (en) | 2012-03-06 | 2013-03-06 | Mechanism for collapsible bunk-beds |
RS20190417A RS58598B1 (en) | 2012-03-06 | 2013-03-06 | Mechanism for collapsible bunk-beds |
HRP20190552TT HRP20190552T1 (en) | 2012-03-06 | 2019-03-22 | Mechanism for collapsible bunk-beds |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000341A ITMI20120341A1 (en) | 2012-03-06 | 2012-03-06 | MECHANISM FOR RE-REFUNDABLE CASTLE BEDS. |
IT000632A ITMI20120632A1 (en) | 2012-04-17 | 2012-04-17 | SAFETY MECHANISM FOR CASTLE BEDS THAT CAN BE CLOSED. |
PCT/EP2013/054482 WO2013131946A1 (en) | 2012-03-06 | 2013-03-06 | Mechanism for collapsible bunk-beds |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2844110A1 EP2844110A1 (en) | 2015-03-11 |
EP2844110B1 true EP2844110B1 (en) | 2019-01-02 |
Family
ID=47833074
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13707871.3A Active EP2844110B1 (en) | 2012-03-06 | 2013-03-06 | Mechanism for collapsible bunk-beds |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP2844110B1 (en) |
ES (1) | ES2718176T3 (en) |
HR (1) | HRP20190552T1 (en) |
PL (1) | PL2844110T3 (en) |
PT (1) | PT2844110T (en) |
RS (1) | RS58598B1 (en) |
WO (1) | WO2013131946A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10086915B2 (en) | 2015-10-30 | 2018-10-02 | Lippert Components, Inc. | Collapsible privacy enclosure |
US20170143129A1 (en) * | 2015-11-25 | 2017-05-25 | Flexsteel Industries, Inc. | Sofa convertible into bunk bed |
ITUB20160300A1 (en) * | 2016-01-15 | 2017-07-15 | Cannito Sas Di Cannito Michele | MECHANISM FOR TRANSFORMABLE CASTLE BEDS |
EP3403537B1 (en) * | 2017-05-17 | 2019-06-12 | Daniel Gerhard | Space-saving bed |
CN107280319A (en) * | 2017-08-14 | 2017-10-24 | 安徽理工大学 | One kind is freely lifted bunk beds |
CN108338578A (en) * | 2017-11-05 | 2018-07-31 | 无锡德林防务装备股份有限公司 | Sofa-type hides bunk beds |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB621095A (en) * | 1944-12-21 | 1949-04-04 | Birger Nordby | Improvements in double ottomans |
FR981385A (en) * | 1948-12-31 | 1951-05-25 | Boe Ry & Cie | Folding bunk beds |
DE2241842A1 (en) * | 1972-08-25 | 1974-03-07 | Meyer Heinz | BED |
US5263210A (en) * | 1993-02-24 | 1993-11-23 | Pollard Trevor S | Space saving bed |
ITMI20080677A1 (en) * | 2008-04-15 | 2009-10-16 | Stema Srl | MECHANISM FOR BUNK BEDS AND SOFA BED INCLUDING THIS MECHANISM |
ITMI20120341A1 (en) | 2012-03-06 | 2013-09-07 | Giulio Manzoni | MECHANISM FOR RE-REFUNDABLE CASTLE BEDS. |
ITMI20120632A1 (en) | 2012-04-17 | 2013-10-18 | Giulio Manzoni | SAFETY MECHANISM FOR CASTLE BEDS THAT CAN BE CLOSED. |
-
2013
- 2013-03-06 PT PT13707871T patent/PT2844110T/en unknown
- 2013-03-06 PL PL13707871T patent/PL2844110T3/en unknown
- 2013-03-06 RS RS20190417A patent/RS58598B1/en unknown
- 2013-03-06 EP EP13707871.3A patent/EP2844110B1/en active Active
- 2013-03-06 ES ES13707871T patent/ES2718176T3/en active Active
- 2013-03-06 WO PCT/EP2013/054482 patent/WO2013131946A1/en active Application Filing
-
2019
- 2019-03-22 HR HRP20190552TT patent/HRP20190552T1/en unknown
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
HRP20190552T1 (en) | 2019-05-03 |
PL2844110T3 (en) | 2019-06-28 |
PT2844110T (en) | 2019-04-29 |
ES2718176T3 (en) | 2019-06-28 |
RS58598B1 (en) | 2019-05-31 |
EP2844110A1 (en) | 2015-03-11 |
WO2013131946A1 (en) | 2013-09-12 |
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