WO2008041903A1 - Winch for automatic winding up of sheet and the like - Google Patents

Winch for automatic winding up of sheet and the like Download PDF

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Publication number
WO2008041903A1
WO2008041903A1 PCT/SE2007/000848 SE2007000848W WO2008041903A1 WO 2008041903 A1 WO2008041903 A1 WO 2008041903A1 SE 2007000848 W SE2007000848 W SE 2007000848W WO 2008041903 A1 WO2008041903 A1 WO 2008041903A1
Authority
WO
WIPO (PCT)
Prior art keywords
support
drum
winch
inner drum
outer drum
Prior art date
Application number
PCT/SE2007/000848
Other languages
French (fr)
Inventor
Ella Allard
Original Assignee
Ella Allard
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ella Allard filed Critical Ella Allard
Publication of WO2008041903A1 publication Critical patent/WO2008041903A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28—Other constructional details
    • B66D1/40—Control devices
    • B66D1/48—Control devices automatic
    • B66D1/50—Control devices automatic for maintaining predetermined rope, cable, or chain tension, e.g. in ropes or cables for towing craft, in chains for anchors; Warping or mooring winch-cable tension control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/60—Rope, cable, or chain winding mechanisms; Capstans adapted for special purposes
    • B66D1/74—Capstans
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/60—Rope, cable, or chain winding mechanisms; Capstans adapted for special purposes
    • B66D1/74—Capstans
    • B66D1/7421—Capstans having a vertical rotation axis

Definitions

  • the present invention relates to a winch for automatic winding up of sheet and the like, comprising a support, provided to be fastened especially to a sailboat, and an outer drum, able to be rotated in relationship to the support, whereas the drum is arranged to exert a certain moment at said sheet against winding out of same.
  • winches are known in a number of embodiments for sailboats and for other purposes. Common to them is, that the winch exerts a turning moment, aiming at winding up a sheet or the like, that is fastened at the outer drum, until the sheet is under a certain pull stress. None of the known winches of this art seems to have found any wider usage, thus there is a need for a winch of the type mentioned introductorily, that is efficient in use and shows relatively simple design.
  • such a winch is primarily characterised in that the winch comprises an inner drum releasably fastened to the support, coaxial with said outer drum, which inner drum at its mantle is provided with a thread with a cross section, corresponding to an elastic element, preferably with a circular cross section, whereas a gliding element is arranged to be movable with a base portion in a vertical groove in the inner mantle of the outer drum, and whereas the base portion is connected to a grip element extending into the thread, which grip element is arranged to be fastened at an upper end at the elastic element, which is fastened at its lower end at the support.
  • the gliding element When winding out a sheet, that is partly wound up at the outer drum, the gliding element will, with its gliding element draw, that is to say, extend the elastic element along the thread whilst the base portion of the grip element is guided vertically upwards.
  • the elastic element may of different kinds, e g of rubber with a suitable stiffness or another elastomer.
  • the inner drum In normal use of the winch the inner drum is non- turnable in relationship to the support.
  • a pressure element is provided to exert a controllable pressure force at the base portion of the gliding element in the vertical groove in order to increase the moment of the outer drum against winding out of the sheet.
  • the pressure element may be formed in different ways.
  • the pressure element comprises an envelope wherein a screw spring is settable to a desired pressure force against the base portion of the gliding element.
  • the movement of the gliding element vertically downwards in the groove is limited by the extension downwards of the base portion.
  • the normal usage of the winch means, that a sheet is fastened at the outer drum and pulls the sheet to the tensile stress, that shall be maintained automatically.
  • the case may be, however, that it is desirous to pull a sheet above the tensile stress, that is obtained by the extended elastic element.
  • both when the inner drum is released from the support and locked in relationship to the outer drum, both may be rotated in common.
  • an element with spring loaded flaps and corresponding gear ring to admit only one direction of rotation for the outer and the inner drum.
  • winch which admit the inner drum to be non- turnable in relationship to the support and the outer drum is turnable in relationship to the inner drum on one hand, and inner drum to be turnable in relationship to the support in common with the outer drum.
  • an element with spring loaded flaps and corresponding gear ring are provided to admit only one direction of rotation for the outer and the inner drum, so that a sheet may be stretched without the winch yielding.
  • An embodiment of the winch which can operate with automatic stretching of sheets and also without this function will disclosed further below.
  • figure 2 shows a longitudinal section thsough a winch according to the invention in a second embodiment
  • figure 3 shows, in perspective a gliding element for the winch
  • figure 4 shows, in perspective, a central body to the winch.
  • FIG 1 there is shown a support to be fastened e g to a sailboat, with an outer drum 2 with an upper cover 22 and a knob 26 for fastening of a sheet.
  • a manoeuvre tap 19 is provided centrally in a corresponding recess, what is shown more in detail in figure 2.
  • a pressure element 10 which shall be described more in detail below, he winch comprises an inner drum 3, releasably fastened to the support, coaxial with said outer drum 2.
  • the inner drum 3 is provided at its mantle with a thread with a cross section, corresponding to an elastic element 5, in this case with a circular cross section.
  • a gliding element 6, shown more in detail in figure 3, is arranged to be movable with a base portion 7 in a vertical groove 8 in the inner mantle of the outer drum 2.
  • the base portion 7 is connected to a grip element 9 extending into the thread 4.
  • This grip element 9 is arranged to be fastened at an upper end at the elastic element 5, which is fastened at its lower end at the support 1.
  • a pressure element 10 provided to exert a controllable pressure force at the base portion 7 of the gliding element 6 in the vertical groove, so that the turning moment of the outer drum 2 against winding out of the sheet is increased.
  • the pressure element 10 consists of an envelope 11 wherein a screw spring 12 is settable with a desired pressure force against the base portion 7 of the gliding element 6. With this pressure element the turning moment of the winch can be controlled by stretching the screw spring more or less far, which will influence upon the turning moment of the drum 2 against winding out of a sheet.
  • FIG 2 it is shown, that there is provided a central guide bushing 14, fastened to the support 1.
  • the inner drum 3 is formed with a first central recess 15, gliding surrounding the guide bushing 14.
  • the inner drum is also formed with a second central recess, wherein a central body 17, shown more in detail in figure 4, is guided vertically, from below pressed from the support by a screw spring 18.
  • the first central recess 15, the second cenral recess and the central body 17 are such designed and cooperating, that the central body 17 may be positioned in an upper position (not shown in figure 2) where it is in non- turnable contact with the inner drum 3, and is in non- turnable contact with the guide bushing 14, whereas the outer drum 2 is turnable around the inner drum 3.
  • the central body is in a lower position, pressed down against the spring 18 by a manoeuvre tap 19 when the central body is turnable in relationship to the guide bushing 14 but non- turnable in relationship to both the inner drum 3 and the outer drum 2, which latter are turnable in relationship to the support.
  • FIG 4 there is shown an example of design of the central body. It has a lower recess 23, wherein a screw spring 18 presses the central body upwards from the support 1.
  • a gear ring forms part of the element 13, which cooperates with spring loaded flaps mounted at the inside of the guide bushing 14 to admit only one rotation direction of the drums 2 and 3, coupled together.
  • the upper portion 24 at the central body 17 cooperates locking or free from corresponding recess in the inner drum 3.
  • the intermediate portion 25 at the central body 17 cooperates also in a corresponding way with a corresponding recess on the guide bushing 14.
  • the parts and corresponding recesses may be formed with octagonal cross sections.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Unwinding Of Filamentary Materials (AREA)
  • Emergency Lowering Means (AREA)

Abstract

A winch for automatic winding up of sheet and the like is described. It comprises a support (1) and an outer drum (2), able to be rotated in relationship to the support (1), whereas the outer drum (2) is arranged to exert a certain moment at said sheet against winding out of same. The winch is characterized in that it comprises an inner drum (3) releasably fastened to the support, coaxial with said outer drum (2). The inner drum (3) is, at its mantle is provided with a thread (4) with a cross section, corresponding to an elastic element (5). A gliding element (6) is arranged to be movable with a base portion (7) in a vertical groove (8) in the inner mantle of the outer drum (2). The base portion (7) is connected to a grip element (9) extending into the thread (4), which grip element (9) is arranged to be fastened at an upper end at the elastic element (5), which is fastened at its lower end at the support (1).

Description

Winch for automatic winding up of sheet and the like
The present invention relates to a winch for automatic winding up of sheet and the like, comprising a support, provided to be fastened especially to a sailboat, and an outer drum, able to be rotated in relationship to the support, whereas the drum is arranged to exert a certain moment at said sheet against winding out of same. Such winches are known in a number of embodiments for sailboats and for other purposes. Common to them is, that the winch exerts a turning moment, aiming at winding up a sheet or the like, that is fastened at the outer drum, until the sheet is under a certain pull stress. None of the known winches of this art seems to have found any wider usage, thus there is a need for a winch of the type mentioned introductorily, that is efficient in use and shows relatively simple design.
According to the invention such a winch is primarily characterised in that the winch comprises an inner drum releasably fastened to the support, coaxial with said outer drum, which inner drum at its mantle is provided with a thread with a cross section, corresponding to an elastic element, preferably with a circular cross section, whereas a gliding element is arranged to be movable with a base portion in a vertical groove in the inner mantle of the outer drum, and whereas the base portion is connected to a grip element extending into the thread, which grip element is arranged to be fastened at an upper end at the elastic element, which is fastened at its lower end at the support. When winding out a sheet, that is partly wound up at the outer drum, the gliding element will, with its gliding element draw, that is to say, extend the elastic element along the thread whilst the base portion of the grip element is guided vertically upwards. The elastic element may of different kinds, e g of rubber with a suitable stiffness or another elastomer. In normal use of the winch the inner drum is non- turnable in relationship to the support. In one suitable embodiment of the winch according to the invention a pressure element is provided to exert a controllable pressure force at the base portion of the gliding element in the vertical groove in order to increase the moment of the outer drum against winding out of the sheet. The pressure element may be formed in different ways. In one simple embodiment the pressure element comprises an envelope wherein a screw spring is settable to a desired pressure force against the base portion of the gliding element.
In one further advantageous embodiment the movement of the gliding element vertically downwards in the groove is limited by the extension downwards of the base portion. By this design it is avoided, that the elastic element is wound to far against pull direction.
The normal usage of the winch means, that a sheet is fastened at the outer drum and pulls the sheet to the tensile stress, that shall be maintained automatically. The case may be, however, that it is desirous to pull a sheet above the tensile stress, that is obtained by the extended elastic element.
In one further useful embodiment, when the inner drum is released from the support and locked in relationship to the outer drum, both may be rotated in common. In order to warrant, that the sheet remains stressed with the desired tensile stress there is provided an element with spring loaded flaps and corresponding gear ring to admit only one direction of rotation for the outer and the inner drum.
There are many embodiments of the winch which admit the inner drum to be non- turnable in relationship to the support and the outer drum is turnable in relationship to the inner drum on one hand, and inner drum to be turnable in relationship to the support in common with the outer drum. Hereby it is suitable, that an element with spring loaded flaps and corresponding gear ring are provided to admit only one direction of rotation for the outer and the inner drum, so that a sheet may be stretched without the winch yielding. An embodiment of the winch which can operate with automatic stretching of sheets and also without this function will disclosed further below.
The winch according to the invention shall now be described more in detail, reference being made to the enclosed schematic figures, of which: Figure 1 shows schematically, in perspective, a winch according to the invention in one first embodiment,
figure 2 shows a longitudinal section thsough a winch according to the invention in a second embodiment, figure 3 shows, in perspective a gliding element for the winch, whilst figure 4 shows, in perspective, a central body to the winch.
From figure 1 there is shown a support to be fastened e g to a sailboat, with an outer drum 2 with an upper cover 22 and a knob 26 for fastening of a sheet. A manoeuvre tap 19 is provided centrally in a corresponding recess, what is shown more in detail in figure 2. In this, showing a second embodiment, there has been added a pressure element 10, which shall be described more in detail below, he winch comprises an inner drum 3, releasably fastened to the support, coaxial with said outer drum 2. The inner drum 3 is provided at its mantle with a thread with a cross section, corresponding to an elastic element 5, in this case with a circular cross section. A gliding element 6, shown more in detail in figure 3, is arranged to be movable with a base portion 7 in a vertical groove 8 in the inner mantle of the outer drum 2. The base portion 7 is connected to a grip element 9 extending into the thread 4. This grip element 9 is arranged to be fastened at an upper end at the elastic element 5, which is fastened at its lower end at the support 1. In the embodiment shown there is a pressure element 10 provided to exert a controllable pressure force at the base portion 7 of the gliding element 6 in the vertical groove, so that the turning moment of the outer drum 2 against winding out of the sheet is increased. The pressure element 10 consists of an envelope 11 wherein a screw spring 12 is settable with a desired pressure force against the base portion 7 of the gliding element 6. With this pressure element the turning moment of the winch can be controlled by stretching the screw spring more or less far, which will influence upon the turning moment of the drum 2 against winding out of a sheet.
It is possible to vary the extension of the base portion 7 downwards to achieve that the movement vertically downwards of the gliding element 6 in the groove is limited. Thereby it can be prevented, that the outer drum is turned backwards too far in view of the cross section of the elastic element 5, which in certain cases does not fill out the cross section of the thread 4.
In figure 2 it is shown, that there is provided a central guide bushing 14, fastened to the support 1. The inner drum 3 is formed with a first central recess 15, gliding surrounding the guide bushing 14. The inner drum is also formed with a second central recess, wherein a central body 17, shown more in detail in figure 4, is guided vertically, from below pressed from the support by a screw spring 18. The first central recess 15, the second cenral recess and the central body 17 are such designed and cooperating, that the central body 17 may be positioned in an upper position (not shown in figure 2) where it is in non- turnable contact with the inner drum 3, and is in non- turnable contact with the guide bushing 14, whereas the outer drum 2 is turnable around the inner drum 3. In the figure there is however shown that the central body is in a lower position, pressed down against the spring 18 by a manoeuvre tap 19 when the central body is turnable in relationship to the guide bushing 14 but non- turnable in relationship to both the inner drum 3 and the outer drum 2, which latter are turnable in relationship to the support. In figure 4 there is shown an example of design of the central body. It has a lower recess 23, wherein a screw spring 18 presses the central body upwards from the support 1. A gear ring forms part of the element 13, which cooperates with spring loaded flaps mounted at the inside of the guide bushing 14 to admit only one rotation direction of the drums 2 and 3, coupled together. The upper portion 24 at the central body 17 cooperates locking or free from corresponding recess in the inner drum 3. The intermediate portion 25 at the central body 17 cooperates also in a corresponding way with a corresponding recess on the guide bushing 14. The parts and corresponding recesses may be formed with octagonal cross sections.

Claims

Patent claims
1.
A winch for automatic winding up of sheet and the like, comprising a support (1), provided to be fastened especially to a sailboat, and an outer drum (2), able to be rotated in relationship to the support (1), whereas the outer drum (2) is arranged to exert a certain moment at said sheet against winding out of same characterized in that the winch comprises an inner drum (3) releasably fastened to the support, coaxial with said outer drum (2), which inner drum (3) at its mantle is provided with a thread (4) with a cross section, corresponding to an elastic element (5), preferably with a circular cross section, whereas a gliding element (6) is arranged to be movable with a base portion (7) in a vertical groove (8) in the inner mantle of the outer drum (2), whereas the base portion (7) is connected to a grip element (9) extending into the thread (4), which grip element (9) is arranged to be fastened at an upper end at the elastic element (5), which is fastened at its lower end at the support (1).
2.
A winch according to claim 1 , characterized in that a pressure element (10) is provided to exert a controllable pressure force at the base portion (7) of the gliding element (6) in the vertical groove (8) in order to increase the moment of the outer drum (2) against winding out of the sheet.
3.
A winch according to claim 2, characterized in that the pressure element (10) comprises an envelope (11) wherein a screw spring (12) is settable to a desired pressure force against the bas portion
(7) of the gliding element (6) .
4.
A winch according to claims 1 to 3, characterized in that the movement of the gliding element (6) vertically in the groove (8) is limited by the extension downwards of the base portion (7).
5.
A winch according to any of claims 1 to 4, characterized in that the inner drum (3) released from the support (1) may be locked in relationship to the outer drum (2) so that they may be rotated in common.
6.
A winch according to claim 5, characterized in that an element (13) with spring loaded flaps and corresponding gear ring are provided to admit only one direction of rotation for the outer and the inner drum (2,3).
7.
A winch according to claim 4 or 5, characterized in that a central guide bushing (14) is provided, fastened to the support, and that the inner drum (3) is designed with a first central recess (15), gliding surrounding the guide bushing (14). and the inner drum (3) also is designed with a second central recess ((16) wherein a central body (17) is vertically guided, from below pressed from the support by a screw spring
(18) whereas the first central recess (15), the second central recess (16) and the central body (17) are such designed and cooperating, that the central body (17) may be positioned in an upper position, in which it is in non- turnable contact with the inner drum (3), and is in non- turnable contact with the guide bushing (14). and the outer drum (2) is turnable around the inner drum (3), and that the central body (17) may be positioned in a lower position, pressed down against the spring (18) by a manoeuvre tap (19) when the central body (17) is turnable in relationship to the guide bushing (14). but non- turnable in relationship to the inner drum (13) as well as the outer drum (2), which latter are rotatable in relationship to the support.
8.
A winch according to claim 7, characterized in that the manoeuvre tap (19) is lockable in its lower position by a lock (20), cooperating with a groove (21) in the manoeuvre tap (19).
PCT/SE2007/000848 2006-10-02 2007-09-26 Winch for automatic winding up of sheet and the like WO2008041903A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0602111-7 2006-10-02
SE0602111A SE0602111L (en) 2006-10-02 2006-10-02 Winch for automatic roll-up of bulkheads and the like

Publications (1)

Publication Number Publication Date
WO2008041903A1 true WO2008041903A1 (en) 2008-04-10

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ID=38331494

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2007/000848 WO2008041903A1 (en) 2006-10-02 2007-09-26 Winch for automatic winding up of sheet and the like

Country Status (2)

Country Link
SE (1) SE0602111L (en)
WO (1) WO2008041903A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3581854A (en) * 1968-07-24 1971-06-01 Kreske Walter J Torque and backstop device for winches
US3910557A (en) * 1973-06-07 1975-10-07 Franklin Merriman Synthetic resin ratchet winch
US3968953A (en) * 1975-01-27 1976-07-13 Barient Company Self-tailing winch
US4369952A (en) * 1980-02-11 1983-01-25 Lennart Kurling Manually driven winch

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3581854A (en) * 1968-07-24 1971-06-01 Kreske Walter J Torque and backstop device for winches
US3910557A (en) * 1973-06-07 1975-10-07 Franklin Merriman Synthetic resin ratchet winch
US3968953A (en) * 1975-01-27 1976-07-13 Barient Company Self-tailing winch
US4369952A (en) * 1980-02-11 1983-01-25 Lennart Kurling Manually driven winch

Also Published As

Publication number Publication date
SE529470C2 (en) 2007-08-14
SE0602111L (en) 2007-08-14

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