Патент USA US2107993код для вставки
Feb. 8, 1938. M. Fox 2, 107,993 SOFA BED Filed Jan, 13, lese 2 Sheets-Sheet 1 Feb. 8, 1938. M. FOX 2,107,993 SOFA BED Filed Jan. 13, 1956 2 Sheets-Sheet 2 2,107,993 Patented Feb. 8, 1938 UNITED STATES PATENT orFicE 2,107,993 som BED Martin Fox, Chicago, lll., assignor to The Seng Company, Chicago, lll., a corporation of Illi noia Application January 13, 193s, serial No. 58,360 9 Claims. This invention relates in general to improve ments in convertible furniture and more particu larly. to a hinged structure in which two uphol stered sections are connected at right angles to 5 form a seat and are moved into alignment to form a bed.l ' ._ -In convertible furniture of this type ‘as pre (Cl. 5-47) This invention relates to a folding seat struc ture in which there are two sections mounted in a frame 6 supported at the ends by legs or'by end frames -[which form arm rests. 'In the arm rest type the structure is usually called a bed daven port and when the end arms are omitted it may _be referred to 'as-a studio couch. In either form viously used, the sections have been directly con- ’ `the sections are so connected that when the back ' nected thereto, holding them at fixed distances 10 in both. limiting positions. While this may have is raised as- shown in Fig. l, lt is rigidly held in position 4against movement in either Adirection 10 been satisfactory for nat, hard seats or solid - with respect to the seat section, and the sections frame sections, it does not suit the modern type of upholstered furniture with soft projecting or spring filled cushions 'which extend above the 15 frames, and a variable hinge must be provided to position the adjacent upper edges of the sections closely together as a bed,.and to locate one of these edges at a distance. below but close to the other section to obviate an objectionable crack or recess between them when used as a seat. b2 _must first be moved together by raising lthe seat section or lowering the back section to the posi tion approximately shown in Fig. 2, before the sections are automatically _unlocked and the seat 15 section can be _lowered _to a position in alignment as shown- In Fig. 3. ` Referring now more particularlyv to the draw ings, the seat section comprises> a marginal frame 8 with an upholstered portion 9 projecting from it An important object of this invention is there- » _ on all sides. The back section comprises a similar fore to provide a foldable sectional structure in which the distance between the adjacent edges of the sections are varied as they are swung from one position to the other. A further object of the invention is in the pro- ' vision of a spacing hinge structure for upholstered sections in which the adjacent edges of the sec' tions are close together when they are in align ment to form a bed, and the same edges of the sections are moved one behind and below the other when the sections are changed. to form a ~ seat. I Other and further objects of the invention are; to provide a compound spacing hinge for con necting adjacent upholstered sections;~ to im prove the locking pawl; to provide substantially ’ parallel link and carrier arms; to oñset one vof the leaf pivots; to provide aback section stop; and in general to produce the construction herein shown and described. In the accompanying drawings illustrating a preferred embodiment of the invention, Fig. 1 is a side elevation of a sofa bed struc-ture in seat position with the adjacent arm or end rest omitted; Fig. 2 is a broken elevation of the sections with the back section in lowered position and the 50 frame I0 with an upholstered -cushion structure Il secured thereto and projecting from it at one side of the fame. These cushion structures may ~ have yielding springs l2 or any other upholstering construction to make the seat soft and com fortable. Attached at each end of the seat and back frames are hinge leaves or plates I3 and I4 respectively, the seat plate having a projec tion I5 to offset a rivet I6 therein adjacent the back section.' A hinged lever I1 is connected by the pi'vot I6 to the-plate I3 at one end and at the other end the lever is connected by a pivot I8 to one endof a short link I9, the other end of which is connected by a pivot 20 to the other plate I4. Similarly the plate I4 is connected by means of a lever 2| having a pivot 22 at one end engaging the plate I4 at a distance from the edge of the plate and from the edge of the back section, and the other end of this lever is connected by a pivot 23 with one end of a link 24, the other end of which is connected by a pivot 25 with the plate I3. The two levers I‘I and 2| are pivotally connected intermediate their ends by a pivot 26 so that the hinge plates thus -joined constitute a compound spacing hinge with a double connection between the plates at each end of the sections to which they are connected. seat section partially raised; ì The seat and back sections are connected in Fig. 3 is an end elevation showing, the sections in position to form a bed; Fig. 4 is a detail ,view showing the hinge lock ing mechanism In one position; and Fig. 5 is a detail view showing the hinge lock their supporting frame 6 by means of a plate 30 attached adjacent the rear of the frame and sup porting" arms 3I and 32 each pivoted at one end to the plate 30 and at the other end to the plate It. Between these arms on the plate 30 is a stud 33 which engages one of the arms 3I in its raised 55 55 ing mechanism in another position. ‘ 2,107,993 position as shown in Fig. 1, to limit the movement 10 15 20 25 of the arm in a rearward direction. These arms being then unsustained drops to the _position o! 3| and 32 may be of substantially uniform length and their pivot points are so located in the plates to which they are connected that they auto matically turn the back section from an inclined raised position as shown in Fig. 1, to a horizontal lowered position as shown in Figs. 2 and 3 when the back section is bodily moved upon the arms. In order to automatically lock and release the sections, a latch 3| is pivoted at one end to one of the levers 2| between its pivots 26 and I6 and the other end of this latch is formed with a hook 35 adapted to engage a headed stud 36 secured to an extension 3l of the plate |3 when the sec tions are moved approximately to right angle position. Also carried by the latch is a gravity locking pawl 38 which has a pivot 39' interme diate the ends of the latch 34 and a slot with longitudinal and transverse portions 39 and 40 for engaging the same stud 36 and controlling its latching operations with the hook 35. To limit the movement of this locking awl in one direction, a headless stud 4| projec from the latch 34 and prevents further movement of the Fig. 3 ready for re-engagement when it is desired locking pawl in that direction. „ In operation, assuming that the seat and back sections are in alignment as shown in Fig. 3, the latch 34 and its locking pawl 36 will be at their 30 lowermost positions with the stud 36 at the upper end of the slot portion `39. y To raise the back section the front of the seat section may first be raised causing the stud 36 to raise the free end of the latch 34 until the notch 35 of the hook 35 engages the stud approximately in the position shown by Fig. 2. In this position thc seat and back sections are locked together at right Yangles and may be rocked freely upon the sup porting arms 3| and 32, and as the sections are 40 approximately balanced it requires very little effort to move the sections to the raised back position as shown in Fig. l. To change the structure from a seat to a bed, the backV Vsection may be pushed downwardly or 45 the seat section may be raised as shown in Fig. 2. in which the sections are locked in position sub stantially at right angles, but with the back a little inclined as shown in Fig. l, and when the movement of the seat section is continued after 50 the back is at rest in horizontal position, to a position as shown approximately in Fig. 4, then the stud rides along in the hook 35 and out of to convert the bed to a seat. The extended tooth on the latch ln positions similar to Fig. 4 limits the relative motion of seat and back in one direc tion while they may still be free to move relatively in the opposite direction. with this construction it will be seen that the action and engagement of the locking pawl and latch is entirely automatic, it depends upon the position and operation of the seat sections and because of the compound lever action between the hinge leaves or> plates and the disposition of the pivoting levers offset with respect to the edges of the plates, the. adjacent edges of the upholstered portions of the sections are’ moved closely to gether when they are brought-into alignment as shown more clearly by Figs. 3 and 5 so that a sub stantially continuous sleeping surface is provided. When the sections are moved at right- angles to each other, the offset relation of the hinge parts provides an offset relation of the adjacent up holstered edges so that that of the back is dis posed at a distance below the adjacent edge of 25 the seat section as shown more clearly in Figs. 1 and 4, so that. the lower upholstered edge of the back section is behind and below but closely adja-l cent to the rear edge of the seat section. This construction makes it possible to provide this fold 30 ing structure for an upholstered seat bed of the davenport or studio couch type and to prevent the formation of an objectionable crack, space, or opening between the sections even though the seat section is considerably depressed» at its rear 35 edge. I claim: 1. In a sofa bed, a seat section, a. back section,v plates attached to adjacent edges of the sections, one plate having a pivoting projection toward the other and the other having a pivot inset from the edge, a. pair of hinge levers pivotally connected to each other intermediate their ends, one lever piv oted at one end to the projection, the other lever been pushed a trifle farther forward as shown in pivoted at one end to the inset pivot, the projec 45 tion and the pivot it carries overlappingthe sec tion to which the other plate is attached in one position of the sections to bring them close to gether, and link means for connecting the other end of each lever to the opposite plate to swing the opposite ends of the levers apart and to oiIset the plates in a right angled position so that the edge of one section will project over the adjacent edge of the other. 2. In a sofa bed, seat and back sections, crossed 55 levers pivoted upon each other and one end of each lever pivoted to one of the sections. the other end of each lever having a link pivoted at one end to the lever and at the other end to the Fig. 4, is then pulled backward. The stud 36 then moves closer to the pivot of the latch 3l but opposite section, the levers being pivoted to move the sections together in alignment and to odset as the transverse portion of slot 40 now bears on stud 36 the latch 34 and pawl 33 now form a them at right angles, so that the back section is extended below the level of and close to the seat the vertical portion 39 of the locking pawl until the pawl 38 drops by gravity, so that the trans 55 verse portion 40 of its slot engages the stud 36. In this position the back and seat sections can be moved no closer together and the release of the hook 36 takes place when the seat having 60 t the pawl to take such a position and the latch toggle with their common pivot out of the line As these last two pivot points move together the common pivot is forced away carrying the latch relatively upward until it is disengaged from the stud. The latch is kept in the disengaged position by the 70 pawl, the pawl remaining in position until about the position of Fig. 5Ais reached. In this position pin 4| engages the pawl and during further move ment to alignment either the pawl will drop naturally by gravity so that the' stud 36 comes to the then vertical slot 33 or the pin will compel 65 joining the stud and the latch pivot. section, a projection on one of the sections. a lock ing latch pivoted at one end to that lever directly 65 pivoted to the last named section and having a hook at the other end for engaging the projection when the sections are nearly at right angles and lock them against relative movement into align~ ment. 3. In a sofa bed, seat and back sections, crossed levers pivoted together intermediate their ends and one end of each lever pivoted to one of the sections, a link pivotally connecting the other end ot each lever to- the opposite section, a projection 76 3 2,107,993 ?xed on one section, a latch pivoted at one end to the lever directly pivoted to this section having a hook at its other end to engage the projection for Si locking the. sections substantially at right angles 7. A convertible sofa bed, comprising back and seat sections, a supporting frame therefor, a hinging structure connecting the sections to move the edges closely together when in alignment to against relative movement in one direction, and a locking pawl pivoted upon the latch and engag ing the projection to release the hook from its said form a bed and to offset the lower edge of the back below the back upper edge of the seat sec~ tion when in seat position, means for locking the locking engagement for returning the sections into alignment. hinge parts against the movement of the sections together in seat position, arms pivotally connect ing the back section and the supporting frame 10 and for moving that section from upright to hori 4. In a structure according to claim 3, the „latch and the pawl being mounted to engage and dis engage by gravity, and the latch having a stud to engage the pawl for releasing it from the pro jection in one direction of movement. 5. A structure in accordance with claim 3 in which the pawl has a closed slot engaging the zontal position, and a projection ñxed on the sup portingframe for engaging one of the arms to support the back against rearward movement in projection with angularly disposed portions par allel to the length and transversely of the pawl, the parallel portion holding the latch against tions, comprising a plate for each section, hinge levers one directly pivoted to each plate and piv relative movement of the sections into alignment, and the thrust of the transverse portion of the slot against the projection throwing the latch up out of such engagement with the projection to allow movement of the sections into alignment. 6. In a convertible sofa bed, the combination with back and seat sections, of a supporting frame therefor, a hinging structure comprising end plates >and crossed levers pivoted thereto and connecting the sections for movement closely to 30 gether when in alignment and oiïsetting one of the adjacent edges with respect to the other so that the back section extends considerably below the level of and ‘close to the seat section when the sections are in seat position, and a pair of the seat position. , 15 8. A convertible sofa bed hinge for two sec oted together between their ends, a link for each lever pivoted at one end to the lever and at its other end to the opposite plate, a projection below the hinge on one plate, a latch pivoted to the lever directly pivoted on that plate having a hook to engage the projection as the plates are moved apart, a 'carrier pawl pivoted on the latch and having a slot to engage the projection, and a stud on the latch to disengage the pawl in one direction, the pawl and latch being otherwise automatically operated by gravity. 9. A convertible sofa bed mounting compris 30 ing a structure in accordance with claim 8, with a mounting plate attached to one of the hinge plates by two arms pivoted at their ends to the mounting plate and the hinge plate and located arms both pivotally connected at one end to the to move the hinge plate from a horizontal to a . Ll supporting frame and pivoted at the other ends to spaced points on the same end plate and op vertical position, vthe mounting plate having a erative to move the back section from an up right to a horizontal position. stud to engage one of the arms for limiting its movement in that direction. MARTIN FOX.