Classifications

• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
  • E04F10/00—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins
  • E04F10/02—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins
  • E04F10/06—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins comprising a roller-blind with means for holding the end away from a building
  • E04F10/0611—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins comprising a roller-blind with means for holding the end away from a building with articulated arms supporting the movable end of the blind for deployment of the blind
  • E04F10/0614—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins comprising a roller-blind with means for holding the end away from a building with articulated arms supporting the movable end of the blind for deployment of the blind whereby the pivot axis of the articulation is parallel to the roller
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
  • E04F10/00—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins
  • E04F10/02—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins
  • E04F10/06—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins comprising a roller-blind with means for holding the end away from a building
  • E04F10/0644—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins comprising a roller-blind with means for holding the end away from a building with mechanisms for unrolling or balancing the blind
  • E04F10/0651—Sunshades, e.g. Florentine blinds or jalousies; Outside screens; Awnings or baldachins of flexible canopy materials, e.g. canvas ; Baldachins comprising a roller-blind with means for holding the end away from a building with mechanisms for unrolling or balancing the blind acting on the arms
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
  • E05D11/00—Additional features or accessories of hinges
  • E05D11/10—Devices for preventing movement between relatively-movable hinge parts
  • E05D11/1028—Devices for preventing movement between relatively-movable hinge parts for maintaining the hinge in two or more positions, e.g. intermediate or fully open
  • E05D11/105—Devices for preventing movement between relatively-movable hinge parts for maintaining the hinge in two or more positions, e.g. intermediate or fully open the maintaining means acting perpendicularly to the pivot axis
• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
  • E05Y2900/00—Application of doors, windows, wings or fittings thereof
  • E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
  • E05Y2900/13—Type of wing
  • E05Y2900/146—Shutters

Definitions

• Ratchet device especially for awnings.
• the invention concerns a ratchet device, especially for awnings, comprising two rotatably interconnected elements, one element having at least one portion formed as a sector of a ratchet wheel and the other element being provided with a pawl cooperating with the teeth of the first element, and a member which is movable in relation to the second element between a first and a second position, whereby the member in its first position prevents interengagement of the pawl of the second element and the teeth of the first element, and in its second position permits such engagement, which member is adapted to be brought from the first position to the other and vice versa, due to relative rotation of the element in the one resp. the other direction.
• awnings comprise a roll which extends horizontally and is rotatably fastened through brackets to the house wall above the window which is to be shielded against direct sunlight, and to which roll an edge og the awning cloth is fastened for the winding thereof on the roll,
• the opposite edge of the awning cloth may over its length be connected to a rod, e.g. an aluminium section, which in turn is fastened to the house wall through arms rotatably connected thereto below the roll.
• a manoeuvering line winded on the roll for winding the awning on or off which line may be fastened by means of a suitable device.
• the line is given out, whereby the cloth is winded off the roll, e.g. due to the weight of the said rod, the arms guiding the rod in a circular path away from the house wall until the desired degree of shielding is achieved.
• the said rotatable connection between the arms and the house wall is formed as a ratchet device which permits rotation of the arms in one direction in order to wind the awning cloth off the roll, but prevents movement of the arms in the other direction, the awning cloth may be tightened by means of the line which thereafter is fastened when the desired degree of shielding is obtained.
• the pawl of the ratchet device must be brought out of engagement with the teeth thereof.
• This toggle joint is very complicated and comprises parts which when in use are subjected to wear which may prevent the function of the device.
• the object of the invention is to provide a ratchet device of the abovementioned type, which is not burdened with the abovementioned drawbacks.
• Fig. 1 is a side view of a ratchet device for awnings, fastened to a house wall, one sideplate or string thereof being removed,
• Fig. 2 is an enlarged sectional view taken along the line II-II in fig. 1 and
• Fig. 3 - 6 are views similar to the one which is shown in fig. 1, but where the parts of the device are shown in other relative positions.
• the stationary part of the shown ratchet device 1 comprises a U-shaped element 2, consisting of two parallel, spaced, plateshaped strings 3, 4 fixedly connected to a bottom or mounting plate 5.
• the element 2 may be made of a plate of e.g. aluminium bent to U-shape.
• the strings are equal in profile and shaped as a half ratchet wheel which through a rectangular extension thereof is connected to the bottom plate 5, and the saw-tooth shaped teeth 6 of the ratchet wheel have a first flank 7 extending radially in relation to the centre of the wheel, and a second flank 8 which is inclined in relation to a radial line extending through this flank, which flanks are interconnected through a top portion 9 of the teeth 6, extending mainly along the circumference.
• each tooth 6 there is formed a bottom portion 10 extending mainly along the circumference.
• each approximately semi-circular string 3,4 of the U-shaped element 2 there is formed a concentric bore, the diameter of which is adapted to the diameter of a hinge pin 11.
• the element 2 is e.g. by means of screws 15 fastened to the house wall 12, in such a way that the plate plane of the strings is vertical and the radially extending tooth flanks 7 are partly facing away from the wall, partly downwards.
• An arm 13, one end of which is fastened to a rod which is connected to the outer portion, i.e. the portion facing away from the house wall 12, of the awning cloth when this is stretched out from the wall, is in its other end provided with an elongated end piece 14 introduced between the strings of the element, which end piece forms an extension of the arm 13 and in which there likewise is formed a throughgoing hole, the diameter of which is adapted to the diameter of the hinge pin 11.
• the hinge pin 11 is introduced into the holes in the strings 3, 4 and the interposed end piece 14, so that the arm 13 can be rotated about the hinge pin 11.
• the hinge pin 11 may be secured by means of a nut, a cotter pin or the like.
• the end piece 14 has two parallel side faces extending perpendicularly to the longitudinal axis of the bore formed through this, the distance between the side faces being somewhat less than the distance between the interopposing side faces of the strings 3, 4 of the element 2.
• each side face of the end piece is provided with a protruding guide pin 16 resp. 17 for an approximately U-shaped spring 18, 19, e.g. made of metal thread, arranged around this.
• One leg of the springs 18, 19 is resting against a shoulder formed by the end portion of the arm 13, and the other leg of the springs is fixedly connected to the respective end of an elongated blocking element or pawl 20.
• This pawl extends perpendicularly to the said parallel side faces of the end piece 14, and may, due to the mounting of the springs 18, 19, on the guide pins 16, 17 resiliently be moved close to and along a surface portion 21 of the end piece, which portion extends in a plane which likewise is perpendicular to these side faces and which extends approximately radially in a relation to the longitudinal axis of the bore formed in the end piece
• the pawl 20 and the surface portion 21 of the end piece are positioned at the side of the end piece 14 facing towards the radially extending flank of a tooth 6, when the arm 13 is rotated anticlockwise until its end piece 14 has passed the tooth 6 in question.
• the springs 18, 19 are prestressed in such a way that they seek to press the pawl 20 radially inwards towards the said longitudinal axis.
• the end piece 14 is preferably provided with an outwards, from the surface portion 21 protruding shoulder 22, the radial distance of which from the longitudinal axis of the said bore is somewhat larger than the radial distance between the bottom portion 10 between the teeth 6 and this longitudinal axis,
• the cross section shape of the pawl 20 is rectangular and the pawl 20 arranged with one side face facing the adjacent surface portion 21 of the end piece 14. Further the longitudinal side edges facing the axis of rotation of the element 14 are preferably chamfered.
• the end piece 14 For reception of the central portion of a U-shaped spring 23, e.g. made of spring steel, which portion extends parallel to the longitudinal axis of the bore of the end piece, the end piece 14 has a transverse recess 24, the bottom portion of which forms a support for the central portion of the spring 23, and which is located approximately at a radial line between the longitudinal axis of the said bore and the pawl 20, in which support the spring 23 is adapted to rotate in planes parallel to the side faces of the end piece 14.
• a transverse recess 24 the bottom portion of which forms a support for the central portion of the spring 23, and which is located approximately at a radial line between the longitudinal axis of the said bore and the pawl 20, in which support the spring 23 is adapted to rotate in planes parallel to the side faces of the end piece 14.
• each of the parallel side faces of the end piece 14 is provided with a groove 25 extending from the bottom portion of the recess 24 for reception of the legs of the spring 23, the side portion 26 of which grooves forming stops for limitation of the angular movement of the spring legs.
• the spring legs are terminated directly radially inside of the top portions 9 of the teeth 6, and the width of the grooves 25 resp. the distance between the stops is so large that the spring 23 may be rotated between a first position, in which the ends of the spring legs are positioned directly radially inside of the pawl 20, and a second position, in which the ends of the spring legs are not positioned radially inside of the pawl 20, the spring legs in the second position being rotated clock ⁇ wise in relation to the end piece 14 from the first position, as shown in Fig. 1 and 3-6.
• the spring 23 is prestressed so that the spring legs exert an outwards directed force towards the inner face of the strings 3, 4 of the element 2, the force being so large that it provides sufficient frictional force between the spring legs and the strings 3, 4 to cause rotation of the spring legs in one direction or the other in relation to the end piece upon rotation thereof.
• the function of the ratchet device is as follows:
• Fig. 1 shows the position of the device when the awning cloth is completely winded on its roll which is arranged above the window.
• the arm 13 In this position the arm 13 extends to close to the roll, parallel to the house wall.
• the ends of the spring legs are positioned directly radially inside of the pawl 20, as the arm 13 is brought to this position upon clockwise rotation about the hinge pin 11 and the spring 23 is thereby rotated inwards on the end piece 14. of the arm 13 to its above mentioned, first position due to the friction between the spring legs and the strings 3, 4.
• the pawl 20 is in this position pressed against the upper edge of the strings 3, 4 and is therefore not resting upon the ends of the spring legs, which is better shown in Fig. 2.
• Fig. 3 shows the position of the device after the arms 13 are moved anticlockwise a small angular distance from the position shown in Fig. 1 in order to bring the awning cloth to a position in which it shields against Sunlight.
• the arm 13 When the desired degree of shielding is obtained and if the pawl 20 is hereby not positioned in a space between teeth 6, the arm 13 is moved a small angular distance anticlockwise in order to bring the pawl 20 into the next space between the teeth 6, whereupon the awning cloth is stretched by means of the manoeuvering line, see Fig. 4.
• the pawl is thereby squeezed between the surface portion 21 of the end piece 14 and the radial flank 7 of the adjacent tooth 6, the springs 18, 19, due to their elasticity, practically not loading the guide pins 16, 17.
• the arm 13 is first moved anticlockwise by means of manoeuvering line until the pawl 20 rests on the top portion 9 of the adjacent tooth 6 and the leg ends of the spring 23 are positioned radially inside this top portion 9, as shown in Fig. 5.
• the arm 13 is then moved clockwise, whereby the spring legs, due to the abovementioned frictional force, initially rotates inwards towards the end piece 14 to the said first position in which the leg ends are positioned radially inside of the pawl 20, as shown in Fig. 6.
• the arm may now freely be swung clockwise, the legs of the spring 23 preventing introduction of the pawl 20 into the passing spaces, and the pawl 20 alternately resting on the ends of the spring legs and sliding on the top portions 9 of the teeth 6, until it has passed the tooth space into which introduction is desired and rests on the top portion 9 of the adjacent tooth 6 in a position which corresponds to the one which is shown in Fig. 1.
• This procedure may also be used in order to bring the arm 13 to the position shown in Fig. 1.
• the chamfered, radial inner edges of the pawl 20 effects easy gliding thereof onto the top portions 9 of the teeth 6.
• the radial outer edge of the radial flank 7 of the teeth may of course also be chamfered.
• the arm 13 is then moved anticlockwise whereby the spring 23 initially rotates outwards in relation to the end piece 14, to the said second position, in which the ends of the spring legs are not positioned radially inside of the pawl 20, whereupon the pawl under further rotation of the arm 13 reaches and is introduced into the desired tooth space, and the manoeuvering line again may be tightened and fastened.
• the above description concerns a device in which the end piece 14 of the arm 13 is guided between two strings formed as a sector of a ratchet wheel.
• the device may, however, instead be provided with a U-shaped arm end piece between the legs of which there is arranged a plate formed as a sector of a ratchet wheel.
• the device may then e.g. be provided with a solid pawl of the usual type arranged between the legs of the end piece, one end of the pawl having a bore through which there is introduced a hinge pin connected to the end piece.
• the spring 23 may cinsist of only one L-shaped spring thread, the short leg of which being rotatably supported in the outer portion of the long leg resting against one of the strings 3, 4 or the plate formed as a sector of a ratchet wheel.
• the ratchet device according to the invention is in the above described for use in connection with awnings, but it may of course be used in connection with other collapsible objects e.g. chairs, tables, beds, hood frames, stands etc.

Landscapes

• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Mechanical Engineering (AREA)
• Building Awnings And Sunshades (AREA)
• Prostheses (AREA)
• Confectionery (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=19884616

Family Applications (1)

Country Status (6)

Cited By (1)

Families Citing this family (1)

Citations (7)

• 1979
  • 1979-01-11 NO NO790082A patent/NO141764C/no unknown
• 1980
  • 1980-01-09 WO PCT/NO1980/000002 patent/WO1980001493A1/en unknown
  • 1980-01-11 IT IT19174/80A patent/IT1193890B/it active
  • 1980-01-11 CA CA000343502A patent/CA1138296A/en not_active Expired
  • 1980-01-11 FI FI800086A patent/FI64433C/fi not_active IP Right Cessation
  • 1980-07-29 EP EP80900099A patent/EP0022803A1/en not_active Withdrawn

Patent Citations (7)

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