US2437949A - Sofa bed hinge structure - Google Patents

Sofa bed hinge structure Download PDF

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Publication number
US2437949A
US2437949A US567149A US56714944A US2437949A US 2437949 A US2437949 A US 2437949A US 567149 A US567149 A US 567149A US 56714944 A US56714944 A US 56714944A US 2437949 A US2437949 A US 2437949A
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United States
Prior art keywords
tumbler
pawl
notch
portion
sofa
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Expired - Lifetime
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US567149A
Inventor
Fox Martin
George F Hassel
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Seng Co
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Seng Co
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Priority to US567149A priority Critical patent/US2437949A/en
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    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C17/00Sofas; Couches; Beds
    • A47C17/04Seating furniture, e.g. sofas, couches, settees, or the like, with movable parts changeable to beds; Chair beds
    • A47C17/16Seating furniture changeable to beds by tilting or pivoting the back-rest
    • A47C17/17Seating furniture changeable to beds by tilting or pivoting the back-rest with coupled movement of back-rest and seat
    • A47C17/175Seating furniture changeable to beds by tilting or pivoting the back-rest with coupled movement of back-rest and seat with tilting or lifting seat-back-rest pivot
    • A47C17/1756Seating furniture changeable to beds by tilting or pivoting the back-rest with coupled movement of back-rest and seat with tilting or lifting seat-back-rest pivot by pivoted linkages
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C17/00Sofas; Couches; Beds
    • A47C17/04Seating furniture, e.g. sofas, couches, settees, or the like, with movable parts changeable to beds; Chair beds
    • A47C17/16Seating furniture changeable to beds by tilting or pivoting the back-rest
    • A47C17/17Seating furniture changeable to beds by tilting or pivoting the back-rest with coupled movement of back-rest and seat

Description

March 16, 1948. M. FOX ETAL SOFA BED HINGE STRUCTURE Filed Dec. 8, 1944 3 Sheets-Sheet l m. a Z2 "2 M. 2 aw 2 Z March 16, 1948. M. FOX ETAL. 2,437,949

SOFA BED HINGE STRUCTURE Filed Dec. 8, 1944 3 Sheets-Sheet 2 firzfeii 2 0715:

. ml/flzdawmaw March 16, 1948. M. FOX EI'AL 2,437,949

SOFA BED HINGE STRUCTURE Filed Dec. 8, 1944 5 SheetsSheet 3 Patented Mar. 16, 1948 SOFA BED HINGE STRUCTURE Martin Fox and George F. Hassel, Chicago, Ill, assignors to The Seng Company, a corporation of Illinois Application December 8, 1944, Serial No. 567,149

I 6 Claims.

This invention relates to convertible sofa hinge structures, and more particularly to an improved mechanism for transforming a sofa to a bed, or a bed back to a sofa.

The primary object of the invention is to provide an improved structure which is practically fool proof in operation. The structure permits a sofa to be transformed into abed by merely raising the seat section as far as it will go, and then lowering it to bed position. To return, it is merely necessary to raise the seat section as far as it will go, and then press it down to the sofa position. If desired, the seat section may be retained in raised intermediate position, to facilitate access to the space in the sofa structure beneath the seat.

A further object of the invention is to provide a simple and reliable automatic disengaging member which is yieldingly urged in one direction by gravity or a spring, and does not require an overbalancing movement.

Another object of the invention is to avoid pin-and-slot connections, and to protect the disengaging tumbler from dirt, lint and bedding. which might interfere with automatic operation.

A hinge structure is preferably provided at each end of the sofa, but as the mechanism is similar at each end, only one of the hinges is 11- lustrated in the accompanying drawings, in which- Figure 1 is an elevational view of the structure in sofa position; Fig. 2, a similar view in intermediate position; Fig. 3, a view similar to Fig. 2, with the seat portion fully raised to start release of the pawl; Fig. 4, an elevational view of the structure in bed position; Fig. 5, an elevational view with the seat section being raised from bed position and the tumbler being reset so that the pawl may be reengaged; Fig. 6, an elevational view of the inside of the transfer pawl; and Fig. "I, a sectional view taken as indicated at line 1-1 of Fig. 1, showing the stud to prevent the back of the sofa from tilting forwardly.

In the embodiment illustrated, a metal supporting plate I is provided for attachment by screws to the main frame la (indicated by dotted lines), of the sofa bed. A back plate 8, which is adapted to be secured to the back section 811 (indicated by dotted lines) of the sofa, is connected to the supporting plate I by means of a front arm 9, and a rear arm Ill, said arms being provided with pivots at each end.

A seat plate II is adapted to be secured by screws to the seat section Ila (indicated by dotted lines), and is hinged to the back plate 8 by a pivot l2, which also serves as the upper pivot for the front arm 9. A transfer pawl I3 is pivotally connected to the seat plate II, as indicated at ll, and has edge flanges l5 which 2 form a closure, and tumbler member l8, which is pivotally mounted within the transfer pawl, as indicated at IT. The transfer pawl has a rather large notch l8, which is adapted to engage a small latching finger 19, which may be one leg of a U-shaped keeper 20, secured to the back plate 8.

The tumbler member l6, which is best shown in Fig. 6, has a shouldered indentation with an inner carrying portion 2|, and a communicating throw-out portion 22, which is partially closed by a lobe or guard 23. The tumbler member has a positioning detent 24 to engage the finger l9 and swing the tumbler up into its extreme position in the transfer pawl l3, when the seat section is being raised from the position shown in Fig. 4, through the position shown in Fig. 5, to its uppermost position. Accordingly, when the notch 18 drops over the finger IS, the lower edge of the lobe will ride on the finger i9 andhold that portion of the tumbler l6 up above the notch l8. Upward movement of the seat section is arrested by the outer portion of the notch I8 in the pawl by catching the finger 19. When the movement of the seat section is reversed, the opposite side of the notch l8, which is undercut, comes into engagement with the finger l9, and only then can the tumbler drop down so that its carrying portion 2| engages the finger. It will be seen that only another reversal of the movement of the seat section could bring the throwout portion 22 into engagement with the finger. It will be noted that the tumbler I6 is always urged downwardly about the pivot l1, and no overbalancing is required.

It will be seen in Figs. 1 and 6 that the undercut portion of the notch l8 registers with the carrying portion 2| of the tumbler and forms a reliable support for the weight of the back section in sofa position. The throw-out portion 22 of the tumbler is undercut with respect to the lobe 23, and registers with the'outer open portion of the notch l8, as shown in Fig. 3, so that the tumbler will readily disengage the transfer pawl from the finger when the seat section is lowered from the position shown in Fig. 3. However, the throw-out portion 22 is only effective when it is in engagement with the finger l9, and it can only enter the throw-out portion after it has been in the carrying portion 2| of the tumbler.

In order to prevent the back section of the sofa bed from having itstop portion swing forwardly from sofa position, a stud 25 is provided on the supporting plate I, to be engaged by the rear edge of the arm 9.

A spring 2'6 is tensioned between the front arm 9 and the frame Ia, so as to urge the structure from the sofa position illustrated in Fig. 1 towards the intermediate position shown in Fig. 2. The device is self-locking, but the spring facililimits the movement of a i spring also serves to hold the back section and seatsection in the relation shown in Fig. 1, .while beingtransferred to the intermediate position. That is, the spring tension urges the finger 2i against the inner portion ofthe notch I 8 in the pawl, and downward movement of the back sec tion is prevented bysthe pawl except when the seat section is raised.

To transform the mechanism from the sofa position illustrated in Fig. 1 tothe bed position shown in- Fig. 4, it is merely necessary to raise the seat as high as it will go, which will bring the back section into the bed position shown in Fig. 3, and then lower the seat to the position shown in Fig. 4. During the movement from the position shown in Fig. 1 to the position shown in Fig, 3, the finger l9 shifts from one side of the notch ill to the other and permits the throwout portion 22 of the tumbler to drop into position. Upon reversal of movement of the seat section, the pawl is automatically disengaged by the tumbler. To return to sofa position, it is merely necessary to raise the seat section as high as it will go, and then force it down to the position shown in Fig. 1. The detent 24, in moving from bed position, positions the tumbler so that the finger I 9 does not reenter the throw-out portion 22 of the tumbler.

The foregoing detailed description is given for clearness of understanding only, and no unnecessary limitations should be understood therefrom, for some modifications will be obvious to those skilled in the art.

We claim:

1. A convertible sofa bed hinge structure for a back section and a seat section comprising: a back plate, adapted to be secured to the back section, and provided with carrying arms for pivotally connecting said back plate to a supporting frame; a small latching finger fixed to the back plate; a seat plate hinged to said back plate and adapted to be secured to the seat section; a transfer pawl pivotally connected to the seat plate and having a large notch which opens down-' wardly to engage said latching finger when said plates are in sofa position, intermediate position, or between said positions; a disengaging notched tumbler pivotally mounted on said pawl adjacent to said pawl notch, the notch in said tumbler being shaped to provide an inner shouldered carrying portion to receive the latching finger whenever said finger is received by the inner portion of the pawl notch, and said tumbler notch having an outer throw-out portion to receive. the latching finger when said finger is moved from the inner portion to the outer portion of the pawl notch, said tumbler having an integrally formed guard extending inwardly across the throw-out portion of the tumbler notch towards the carrying portion of the tumbler notch so that the finger can only enter said throw-out portion after it has entered said carrying portion of the tumbler, a detent on said tumbler adjacent to said carrying portion of the tumbler notch and extending downwardly beyond the lower edge of the pawl so as to engage the finger and move the notched portion of the tumbler above the pawl .notch when said pawl is returning from disengaged bed-position; and means for urging the notched portion of said tumbler to swing downwardly from all positions of the pawl.

2. Apparatus'as specified in claim 1, in which I the means for urging the notched portion of the tumbler to swing downwardly comprises an olfcenter pivotal mounting positioned so that said notched portion is urged downwardly by the force of gravity. 7

3 Apparatus as specified in claim 1, in which the inner portion of the pawl notch is undercut inwardly and spaced from the tumbler pivot the same distance as the carrying portion of the tumbler, and the outer throw-out portion of said tumbler, back of the guard, is spaced the same distance from said pivot as the outer portion of said pawl notch.

4. Apparatus as specified in claim 1, in which the transfer pawl has flanged edge portions with spaced ends and being turned towards the back plate, and said pawl and flanged portions form ing a housing and stops for limiting movement of the tumbler with respect to the pawl.

5. Apparatus as specified in claim 1, in which a tension spring is connected to one of the carrying arms and the front of the supporting frame so as to urge the back plate from sofa position towards intermediate position and to urge the latching finger into the latching inner portion of the pawl notch .when in sofa position and intermediate position.

6. A convertible sofa bed hinge structure for a back section and a seat section comprising: a back plate, adapted to be secured to the back section, and provided with carrying arms for pivotally connecting said back plate to a supporting frame; a small latching finger fixed to the back plate; a seat plate hinged to said back plate and adapted to be secured to the seat section; a transfer pawl pivotally connected to the seat plate and having a large notch in its lower edge, undercut inwardly, to engage said latching finger when said plates are in sofa position; a disengaging tumbler pivotally mounted on said pawl to swing downwardly adjacent to'said pawl notch and having a downwardly open notch with a carrying portion to register with the inwardly undercut portion of said. pawl notch, and an undercut throw-out portion to register with the outer portion of the pawl notch; a guard on said tumbler extending inwardly across the throwout portion of the tumbler notch; a repositioning detent on the tumbler, on the opposite side of the tumbler notch from said guard, and extending downwardly below the edge of the pawl to be engaged by the latching finger when returning from bed-position; and means urging the notched portion of. the tumbler to swing below I the pawl notch.

MARTIN FOX. GEORGE F. HASSEL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS

US567149A 1944-12-08 1944-12-08 Sofa bed hinge structure Expired - Lifetime US2437949A (en)

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US567149A US2437949A (en) 1944-12-08 1944-12-08 Sofa bed hinge structure

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US567149A US2437949A (en) 1944-12-08 1944-12-08 Sofa bed hinge structure
GB16506/47A GB626410A (en) 1944-12-08 1947-06-23 Improvements in or relating to convertible sofa bed hinge structures

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2567263A (en) * 1945-05-26 1951-09-11 William W Wilson Sofa bed
US2621339A (en) * 1948-03-29 1952-12-16 Murray J Rymland Combined couch and daybed hinge
US2629883A (en) * 1949-04-04 1953-03-03 Benjamin Levinson Sofa bed hinge
US2701373A (en) * 1952-06-09 1955-02-08 Seng Co Sofa bed with sliding armrests
US2779950A (en) * 1953-01-23 1957-02-05 Paige W Ake Hinges-attached anti-puckering device for the upholstery of sofa beds and the like
US2939156A (en) * 1958-01-30 1960-06-07 Seng Co Sofa-bed
DE975091C (en) * 1950-07-04 1961-08-10 Rudolf Steinborn In a sunbathing Instead convertible couch
DE1185787B (en) * 1960-01-21 1965-01-21 Seng Co In a bed convertible couch
US6651274B2 (en) * 2001-10-01 2003-11-25 Flair Interiors, Inc. Multi-purpose seat/bed having automatic lock/unlock capability
US8713726B1 (en) * 2012-03-16 2014-05-06 Handy Button Machine Co. Pivoting hinge for no-tool assembly of a convertible sofa
US9027178B2 (en) 2010-06-25 2015-05-12 Sauder Manufacturing Co. Sleep system
US9125496B2 (en) 2010-06-25 2015-09-08 Sauder Manufactering Co. Sleep system
USD739664S1 (en) 2010-08-20 2015-09-29 Sauder Manufacturing Co. Furniture convertible between sofa and sleep configurations
US9314104B2 (en) * 2009-12-14 2016-04-19 Sauder Manufacturing Company Sleep system mechanism
US9895002B1 (en) * 2013-11-27 2018-02-20 Hickory Springs Manufacturing Company Folding frames for furniture and bedding
US20190038035A1 (en) * 2017-08-02 2019-02-07 Michael Monir Tadros Convertible sofa bed

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US676004A (en) * 1900-05-31 1901-06-11 Isaac Karpen Box-couch.
US2317105A (en) * 1941-09-17 1943-04-20 Herbert W Neunherz Hinge guard for sofa beds
US2328218A (en) * 1939-11-15 1943-08-31 Brandwein & Company A Studio couch
US2330059A (en) * 1941-05-14 1943-09-21 Kay Mfg Corp Couch hinge
US2334493A (en) * 1941-06-11 1943-11-16 Lake C Johnson Combination couch and bed structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US676004A (en) * 1900-05-31 1901-06-11 Isaac Karpen Box-couch.
US2328218A (en) * 1939-11-15 1943-08-31 Brandwein & Company A Studio couch
US2330059A (en) * 1941-05-14 1943-09-21 Kay Mfg Corp Couch hinge
US2334493A (en) * 1941-06-11 1943-11-16 Lake C Johnson Combination couch and bed structure
US2317105A (en) * 1941-09-17 1943-04-20 Herbert W Neunherz Hinge guard for sofa beds

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2567263A (en) * 1945-05-26 1951-09-11 William W Wilson Sofa bed
US2621339A (en) * 1948-03-29 1952-12-16 Murray J Rymland Combined couch and daybed hinge
US2629883A (en) * 1949-04-04 1953-03-03 Benjamin Levinson Sofa bed hinge
DE975091C (en) * 1950-07-04 1961-08-10 Rudolf Steinborn In a sunbathing Instead convertible couch
US2701373A (en) * 1952-06-09 1955-02-08 Seng Co Sofa bed with sliding armrests
US2779950A (en) * 1953-01-23 1957-02-05 Paige W Ake Hinges-attached anti-puckering device for the upholstery of sofa beds and the like
US2939156A (en) * 1958-01-30 1960-06-07 Seng Co Sofa-bed
DE1185787B (en) * 1960-01-21 1965-01-21 Seng Co In a bed convertible couch
US6651274B2 (en) * 2001-10-01 2003-11-25 Flair Interiors, Inc. Multi-purpose seat/bed having automatic lock/unlock capability
US9314104B2 (en) * 2009-12-14 2016-04-19 Sauder Manufacturing Company Sleep system mechanism
US9027178B2 (en) 2010-06-25 2015-05-12 Sauder Manufacturing Co. Sleep system
US9125496B2 (en) 2010-06-25 2015-09-08 Sauder Manufactering Co. Sleep system
USD739664S1 (en) 2010-08-20 2015-09-29 Sauder Manufacturing Co. Furniture convertible between sofa and sleep configurations
US8713726B1 (en) * 2012-03-16 2014-05-06 Handy Button Machine Co. Pivoting hinge for no-tool assembly of a convertible sofa
US9895002B1 (en) * 2013-11-27 2018-02-20 Hickory Springs Manufacturing Company Folding frames for furniture and bedding
US20190038035A1 (en) * 2017-08-02 2019-02-07 Michael Monir Tadros Convertible sofa bed

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