WO2021048152A1 - Mécanisme pousseur et système de mise en tension d'une sangle incluant de tels mécanismes - Google Patents
Mécanisme pousseur et système de mise en tension d'une sangle incluant de tels mécanismes Download PDFInfo
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- WO2021048152A1 WO2021048152A1 PCT/EP2020/075119 EP2020075119W WO2021048152A1 WO 2021048152 A1 WO2021048152 A1 WO 2021048152A1 EP 2020075119 W EP2020075119 W EP 2020075119W WO 2021048152 A1 WO2021048152 A1 WO 2021048152A1
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- Prior art keywords
- uprights
- column
- parts
- strap
- height
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/10—Programme-controlled manipulators characterised by positioning means for manipulator elements
- B25J9/104—Programme-controlled manipulators characterised by positioning means for manipulator elements with cables, chains or ribbons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B23/00—Equipment for handling lifeboats or the like
- B63B23/02—Davits, i.e. devices having arms for lowering boats by cables or the like
- B63B23/04—Davits, i.e. devices having arms for lowering boats by cables or the like with arms pivoting on substantially horizontal axes, e.g. gravity type
- B63B23/06—Davits, i.e. devices having arms for lowering boats by cables or the like with arms pivoting on substantially horizontal axes, e.g. gravity type with actual pivots
- B63B23/08—Davits, i.e. devices having arms for lowering boats by cables or the like with arms pivoting on substantially horizontal axes, e.g. gravity type with actual pivots the arms being articulated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/10—Programme-controlled manipulators characterised by positioning means for manipulator elements
- B25J9/1075—Programme-controlled manipulators characterised by positioning means for manipulator elements with muscles or tendons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G11/00—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
- F16G11/12—Connections or attachments, e.g. turnbuckles, adapted for straining of cables, ropes, or wire
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/183—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions conveying only reciprocating motion, e.g. wedges
Definitions
- Pusher mechanism and strap tensioning system including such mechanisms.
- the present invention belongs to the technical field of push mechanisms.
- Such means are well known and can consist of vertical pistons or of rods fixed to rotary cams.
- the objective of the invention is to overcome these drawbacks by providing a pushing mechanism of a radically different design and which is in particular based on the observation of the functioning of the muscle of an arm and more particularly of the biceps.
- the length of the muscle of an arm decreases and the muscle stiffens by increasing the transverse volume of the muscle fibers constituting it.
- the invention relates to a pusher mechanism comprising a column capable of being subjected to a compressive or pulling force in operation and having a height (H) defining a first direction, a width (1) and a thickness (E). , the thickness (E) being constant, the height (H) being variable in operation between a value at rest (Ho) and a maximum value (H M ) and the width (1) being variable in operation between a value at rest (lo) and a minimum value (l m ), said column comprising two opposing uprights extending along the height (H) and the thickness (E), as well as reversible means supported by said uprights and designed to transform a compressive force exerted on the uprights along the width (1) of the column into a movement along said first direction of the column whose width (1) then decreases (1 ⁇ lo) and height (H) increases (H> Ho), and vice versa.
- At least two first pieces forming a wedge which extend along the thickness (E) and have at least one surface defining a first plane inclined with respect to a plane perpendicular to said first direction, said at least two first pieces being each integral one of the two uprights facing each other, being located on different uprights and
- At least one second complementary part which extends along the thickness (E) and has two surfaces each defining a second plane inclined relative to said plane, this at least one second part being arranged between two first parts, the first inclined plane of a first piece being designed to slide on one of the second inclined planes of the second piece, so that sliding of the first wedge pieces on said at least one second piece causes movement in said first direction of the at least a second room.
- the uprights are made in at least two independent parts, the height, width and thickness of which are constant, their height being less than (Ho). Said at least two first corner pieces are facing each other or offset according to the height (H) of the column.
- the column comprises several second complementary parts arranged adjacent in said first direction, elastic means being provided to hold said second parts according to this arrangement, during the movements of these second parts in said first direction.
- the invention also relates to a pushing device allowing the generation of a series of pushes offset in time, comprising at least three pushing mechanisms according to the invention, interconnected by their adjacent uprights.
- at least two columns have adjacent uprights interconnected by a vertical link by slide.
- the invention also relates to a system for tensioning an inextensible or substantially inextensible strap extending longitudinally between a distal end portion and a proximal end portion, respectively attached to corresponding attachment points, characterized in that it comprises at least three pushing mechanisms according to the invention, namely a first pushing mechanism for the transverse tensioning on a first central portion of the strap, and two pushing mechanisms for the transverse tensioning on a second and a third strap portions located on either side of the first central portion.
- the system further comprising a lever arm extending longitudinally between a proximal portion and a distal portion for supporting a load, the proximal portion being movable in rotation about an axis fixed to a base, the distal portion of the strap being for its part fixed to said proximal part of the arm by one of the attachment points, and the proximal end portion of the strap being fixed to a fixed point forming the second of the attachment points.
- the number of pushing mechanisms is equal to n + 2 (n> 3), these means being distributed longitudinally along the strap, symmetrically with respect to the central pushing mechanism located equidistant between the fixed point and a pulley or a rotary return cylinder located in the same longitudinal plane as the fixed point.
- FIG. 1 is a three-quarter front view of an example of a pushing mechanism according to the invention, in the rest state.
- Figure 2 is a perspective and exploded view of Figure 1.
- Figure 3 is a front view of Figure 2.
- Figure 4 is a perspective view of the pusher mechanism of Figure 1 in compressed position.
- FIG. 5 comprises FIGS. 5A and 5B which are diagrams explaining the principle of operation of a pusher mechanism according to the invention.
- FIG. 6 is a front view illustrating a device according to the invention, only half of this device being illustrated.
- FIGS. 7 to 10 are front views of the pusher device illustrated in FIG. 6, showing four different stages of the compression of the system illustrated in FIG. 6, when a tension is exerted on the device.
- Figures 11 to 13 are front views illustrating the device of Figure 6 during its compression without load.
- Figure 14 is a front view illustrating a pusher mechanism according to the invention, in the rest state, having a different shape from the pusher mechanism shown in Figure 1.
- Figure 15 illustrates a pusher device formed of two pusher mechanisms as illustrated in Figures 1 and 14, after having undergone compression.
- Figures 16 to 19 are front views illustrating a load lifting mechanism using a pusher device according to the invention, during different stages of operation.
- Fig. 20 is a block diagram illustrating the operation of a pusher device according to the invention with a strap exerting pressure on the device.
- Figure 21 is a front view of another pusher device according to the invention illustrating actuation means, the pusher device being in the decompressed position.
- FIG. 22 is a front view of the device illustrated in FIG. 21, in the compressed position.
- Figures 23A to 23D are diagrams illustrating different stages of operation of a device according to the invention for lowering a lifeboat.
- FIGS. 1 to 3 illustrate an example of a pusher mechanism according to the invention.
- This mechanism comprises a column 1 with two uprights 2, 3 facing each other, between which are arranged means 6 which will be described in more detail.
- This column has a height (H) which is here equal to (H 0 ), the mechanism being at rest, that is to say that no compressive or pulling force is exerted on column 1.
- This value (H 0 ) is the minimum value of the height of column 1.
- Each of the uprights extends over this height (H), here equal to Ho.
- Column 1 also has a width (1) which is here equal to (1 0 ), the value of the width of the column at rest, that is to say in the absence of any compressive or pulling force.
- This value (1 0 ) corresponds to the maximum width of the column.
- this column 1 has a thickness (E), this value (E) remaining constant during the operation of the pusher mechanism.
- This notion of "constant” means that the value (E) has a low variation margin, that is to say less than 10% and preferably less than 5% compared to the value of the thickness of the mechanism when 'he is at rest.
- the dimensions (H) and (1) are variable because they vary in much greater proportions, for example by at least 25% compared to their value in the rest position of the pusher mechanism, this variation advantageously being at least 50% or even at least 100% for (H).
- Each of the uprights also extends over this thickness (E) and has a determined width.
- the height (H) of the two uprights 2 and 3 defines a first direction, which is a vertical direction when the pushing mechanism is placed on a flat support, the two uprights 2 and 3 resting on this support.
- This can be constituted by a strap.
- each of the two uprights 2 and 3 is formed of several independent parts, three of them respectively 20,21 and 22 and 30,31 and 32 being visible in Figure 1.
- the height , the width and thickness of each of these parts are constant but these different parts can move away from each other in the direction defined by the height (H), as will be described later.
- each of the columns 2 and 3 comprises two complementary parts inserted between those illustrated in figure 1.
- the means 6 are composed of an assembly of first parts and of second complementary parts which will now be described.
- the first pieces are wedge-forming pieces which extend along the thickness (E) of column 1.
- the first pieces 51, 53, 55, 57 and 59 are integral with upright 2, while the pieces
- Each of these first wedge-forming parts 50 to 59 is here secured to a component part of the corresponding upright.
- Each of them has a triangular front section with an angle at the apex a which is the same for all these first parts.
- This angle a is for example substantially equal to 22 ° when the material constituting the first parts (and the second parts described later) is steel.
- each of these first parts defines a first plane 510 to 590, inclined relative to a transverse plane, that is to say a plane perpendicular to the first direction defined by the height of the uprights of the column, of an angle at 12. It is noted in Figures 2 and 3 that certain first parts, 52 to 57, define another first inclined plane 521 to 571 which is symmetrical with the first inclined plane 530 to 570 with respect to a transverse plane.
- the means 6 also include four second parts 40 to 43, complementary to the first parts and which also extend according to the thickness (E) of the column.
- Each of these second parts has two surfaces each defining a second plane which is inclined with respect to a sagittal plane.
- each of these second parts has a section in the frontal plane in the form of a diamond, so that it has four surfaces each defining a second plane inclined with respect to a transverse plane.
- these four surfaces are pairwise symmetrical with respect to a sagittal plane and with respect to a transverse plane.
- the inclined planes 400,402, on the one hand and 401, 403, on the other hand are symmetrical with respect to a sagittal plane and each of these two pairs define an angle at the apex a, identical to that defined by the first corner pieces.
- the planes 400 to 403 are therefore inclined at an angle a / 2 with respect to a transverse plane.
- the inclined planes 400,401, on the one hand and 402,403, on the other hand are symmetrical with respect to this transverse plane and form an angle at the apex b.
- These planes 400 to 403 are therefore inclined at an angle b / 2 with respect to this sagittal plane.
- these figures show that a second part is placed between two first parts.
- the latter is located between the two first parts 52 and 53 which are integral with two uprights facing each other and located at the same height.
- this second part 41 is located between the two first parts 53 and 54, integral with the two uprights facing each other but this time offset according to the height (H) of the column.
- H height
- the first inclined plane 530 of the first part 53 is designed to slide on the second inclined plane 411 of the second part 41.
- the first inclined plane 520 of the first part 52 is designed to slide on the second inclined plane 410 of the second part 41.
- the second complementary parts 40 to 43 are arranged in the means 6 such that the edges of each of these parts corresponding to the apex angle b are aligned in the first direction of the column defined by its height (H).
- the invention is of course not limited to this embodiment and another system could be provided to hold the second parts according to this arrangement.
- FIG. 4 illustrates the column 1 of the pusher mechanism after a compressive force has been exerted on each of the uprights 2 and 3 along the width of the column and towards the interior of the column.
- This compressive force is illustrated by the arrows Fi and F2 .
- This compressive force is exerted on the column 1 by any suitable means which may or may not form part of the pusher mechanism. These may be mechanical means: jacks, worm screw clamps, cables wound on a winch, hydraulic jacks or pneumatic jacks, for example. One embodiment of such actuating means is described with reference to Figures 21 and 22.
- the pusher mechanism in a material that can be deformed under the action of an electric field, such as a dielectric elastomer for example.
- the action of the electric field would then also result in a form of compression or pulling.
- FIG. 4 thus illustrates column 1 in a fully compressed position.
- the first parts 5a and 5b define two first planes inclined with respect to the sagittal plane, referenced 50a, 5 la and 50b, 51b, each pair defining an angle at the apex a.
- the two complementary parts 4a and 4b define a pair of inclined planes
- FIG. 5A illustrates the assembly of the four parts at rest, with the second parts arranged adjacent in a transverse plane and the first parts being opposite and resting on the outer part of the inclined planes defined by the second rooms.
- Figure 5B illustrates the assembly illustrated in Figure 5A, after a compressive force, shown schematically by arrows Fl and F2, has been exerted on the first parts 5a and
- Figure 5B shows that the first parts 5a and 5b then slide on the inclined planes of the second parts with which they are in contact and cause the separation of the second parts 5a and 5b. These therefore move according to the arrows F3 and F4.
- the height of the assembly therefore increases from its rest position when a compressive force is exerted on it.
- the maximum height of the assembly depends on the length of the inclined planes of the first and second parts and the angle at the apex a. The operation of this assembly is reversible.
- the assembly retains the position it reached, even if the compressive force has ceased to be exerted. This is obtained thanks to the friction between the inclined planes of the first and second parts.
- this stability of the assembly can be obtained when all the parts are made of steel with an angle a less than 22 °, the coefficient of friction being 0.2.
- the angle ⁇ is chosen as a function of the material constituting the parts so as to ensure the stability of the device while maintaining at a minimum value the compression or pulling force necessary to ensure the operation of the device.
- FIG. 6 illustrates a pusher device 8 according to the invention, which comprises nine columns, only one half of the device being illustrated. This device is in the idle state.
- FIG. 6 therefore shows columns 10 to 13 and partially column 14. Each of these columns is of the type shown in FIG. 1 and they are arranged adjacent.
- two adjacent columns like columns 10 and 11, have adjacent uprights linked together by a vertical slide-type connection.
- amount 103 combines two amounts from columns 10 and 11. It is the same for amount 113 and columns 11 and 12, for amount 123 and columns 12 and 13 and finally, for amount 133 and columns 13 and 14.
- the pusher device 8 is placed on a flat solid support (not shown in the figures) and the columns 10 to 14 therefore then extend in a first direction which is vertical, with respect to this horizontal support.
- This support is chosen to facilitate the sliding of the columns when the pusher device is in operation.
- a strap is stretched on either side of the pusher device 1 and exerts pressure on this device, on the side opposite the base, or on the upper part of the device.
- This strap is inextensible or substantially inextensible and reference may be made to FIGS. 16 to 19 which will be described later, in order to visualize its positioning relative to the pusher device.
- FIG. 7 illustrates a step in the operation of the pusher device according to the invention, after a compressive force has started to be exerted on the end uprights 102 of the device, according to the width of the device.
- This compressive force is shown schematically by the two arrows (Fi) and (F2).
- Figure 7 shows that this compressive force essentially had an effect on the columns located in the center of the device. Indeed, only the various constituent parts of the uprights 123 and 133 have started to move away from one another, this separation movement being greater for the upright 133 located most centrally of the device.
- Figure 8 illustrates a next step, after the compressive force has continued to be exerted on the end posts of the pusher device.
- Figure 8 shows that the constituent parts of all the uprights have moved away from each other, the spacing being however greater for the upright 133 located most in the center of the device, this spacing decreasing from the upright 123 to the upright 102.
- Figure 9 illustrates yet a subsequent step in the operation of the device when a compressive force has continued to be exerted.
- FIG. 10 illustrates the fully compressed position of the pusher device according to the invention. All of the uprights 133 to 102 have reached the maximum height (HM), as shown in Fig. 4, while the width of each of the columns 10 to 14 has reached its minimum value (dm). In this mode of operation with a strap exerting pressure, the different columns are deformed according to the following principle, illustrated in FIG. 20, so as to act on the strap.
- HM maximum height
- dm minimum value
- the pusher device in question comprises three columns, for example of the type illustrated in FIG. 1, spaced apart from each other.
- the strap 83 is secured by its proximal end portion 830 to a base 832 and by its distal end portion 831 to the proximal portion 810 of a lever arm.
- Reference 82 designates the axis around which the lever arm is rotatable and reference 833 a fixed axis for maintaining the strap.
- the references 84, 85 and 86 each designate the center of a portion of strap, the latter therefore being divided into three portions.
- a column (not shown) is placed opposite each of these three centers.
- strap 83 extends horizontally between base 832 and axis 82 (position shown in solid lines).
- a compression exerted on the pusher device generates a first tensioning, shown diagrammatically by the arrow 90, on the substantially central portion of the strap 83 (diagrammatically by its center 84).
- This pressurization leads to raising this portion to a height hl and causes the formation of an angle a between the direction of the strap at rest and after this first pressurization (position shown in dotted lines in Figure 20).
- This first pressurization is exerted perpendicular to the initial position of the strap, that is to say here vertically.
- the compression on the pusher device simultaneously or successively generates a second and a third pressurization, shown diagrammatically by arrows 91 and 92.
- Each of these tensionings is exerted on a lateral portion of the strap (shown diagrammatically by its center 85, 86) and leads to raising this portion of strap to a height h2, h3. It therefore leads to forming an angle b between the direction of the strap 83 after the first pressurization (illustrated in dotted lines) and after the second and third pressurizations (illustrated in solid lines).
- the compression on the pusher device generates a fourth pressurization, this time on the substantially central portion of the strap, shown diagrammatically by the arrow 93. It leads to this portion of the strap being raised to a height h4.
- FIG. 20 is only a block diagram and, in practice, the pushing device according to the invention can generate a succession of pushing cycles on the strap and this, on more than three portions of strap in the as the device comprises more than three columns.
- the fact remains that any portion of a strap is liable to deform under the effect of a column which deforms in height (and therefore in width) if this column is surrounded by two adjacent columns compressed by the strap.
- the pusher device retains the position in which the compressive force placed it, even if this is removed. This is permitted if sufficient frictional forces exist between the facing inclined planes.
- FIGS. 11 to 13 and 10 illustrate another mode of operation of the pusher device 8 illustrated in FIG. 6.
- the pusher device is placed on a flat support (not illustrated in the figures).
- Figure 11 illustrates a step in the operation of the pusher device of Figure 6, after a compressive force has started to be exerted on the end posts 102 of the device, depending on the width of the device. This compressive force is shown schematically by the two arrows Fl and F2.
- Figure 12 shows that this compressive force essentially had an effect on the columns located at the ends of the device. Indeed, only the various constituent parts of the uprights 102 and 103 have started to move away from each other, this separation movement being greater for the upright 102 located at the end of the device.
- Figure 12 illustrates a next step, after the compressive force has continued to be exerted on the end posts of the pusher device.
- FIG. 12 shows that the constituent parts of all the uprights have moved away from each other, the spacing being however greater for the upright 102 located at the end of the device, this spacing decreasing from the upright 102 to the upright 133.
- FIG. 13 still illustrates a subsequent step in the operation of the device when a compressive force has continued to be exerted on the pusher device. It can be seen that the upright 102 located at the end of the device has practically reached its maximum value, while the other uprights 103 to 123 have seen their constituent parts deviate more and more. As previously, FIG. 10 illustrates the fully compressed position of the pusher device according to the invention, in this second operating mode.
- the operation of the pusher device according to the invention does not require any control mechanism, including in particular electronic means.
- the deformation of the columns is generated only by the compressive or pulling force exerted on the device.
- the columns which deform in the first place differ depending on whether or not compression is exerted on the upper part of the device.
- Figure 14 illustrates a pusher mechanism according to the invention of a different design from that illustrated in Figure 1.
- FIG. 14 illustrates a different embodiment in which the column 7 comprises two opposing uprights 27 and 37 between which are mounted reversible means 67.
- FIG. 14 shows that these means 67 comprise an assembly of eight second parts 407 to 477 which are arranged adjacent according to the height H of the column 7 and held together by elastic means 44.
- These means 67 also include a plurality of first parts 60 which are carried by the five constituent parts of each upright, respectively 270 to 278 for the upright 27 and 370 to 374, for the upright 37.
- This column 7 is designed for use in a pusher device with column 1 shown in Figure 1.
- the height (H) of the column 7 is equal to (Ho), when the mechanism is at rest, that is to say in the position illustrated in figure 14 and that no compressive force or draw is exerted on column 7.
- this value (Ho) is the minimum value of the height of column 7.
- Column 7 has a width (1) which is here equal to (o), corresponding to the value of the width of column 7 at rest, that is to say in the absence of any compressive force or draw.
- This value (o) corresponds to the maximum width of the column.
- the uprights are nested one within the other so as to allow their vertical relative sliding.
- a pusher device formed by columns 1 and 7 when a pusher device formed by columns 1 and 7 is at rest, it has a height equal to Ho and a width less than lo + o , taking into account the interlocking of the uprights 37 and 2.
- the angle at the apex a of the first parts 60 of the column 7 is equal to the angle at the apex of the first parts 50 to 59 of the column 1.
- the inclined planes defined by the second parts 407 to 477 of column 7 form, with the transverse plane, an angle a / 2, like the inclined planes of the first parts 40 to 43 of column 1.
- figure 15 illustrates this pusher device after it has been completely compressed, following the application of a compressive force on the uprights.
- FIG. 15 shows that, in this position, each of the columns 1 and 7 has the same height which corresponds to the maximum value of this height (H m ).
- each of the columns 1 and 7 has decreased to reach a minimum value, respectively (l m ) and (l ′ m ).
- the minimum width of the pusher device illustrated in FIG. 15 is less than 1 m + l ' m .
- FIG. 15 shows that it is possible to design columns of different width and which nevertheless make it possible to achieve the same maximum height under the effect of a compressive force.
- a pushing device according to the invention can consist of pushing mechanisms, the first parts and second parts of which have different angles at the top from one pushing mechanism to another.
- the maximum height of a pushing mechanism reached under the effect of a compressive force depends on the length of the inclined planes defined by the first and second parts as well as on the angle at the top of the first. parts and, accordingly, the inclination of the inclined planes of the second parts.
- FIGS. 21 and 22 illustrate an embodiment of means for actuating a pusher device 9 according to the invention, placed on a support 9d.
- This pusher device comprises ten columns 100 arranged adjacent, between two end uprights 9a, 9b, intermediate uprights 9c being common to two adjacent columns. Each of these columns is of the type shown in Figure 1.
- Elastic means 101 are provided between the uprights so as to connect them elastically to one another. These means pass through all of the uprights by being attached to the two end uprights or are provided between two adjacent uprights, throughout the device.
- the actuating means 94 comprise a worm 95, a first end of which is connected to a motor 96 located opposite an end post 9a of the device and which completely passes through the device 9 to extend beyond the other end post 9b of the device.
- the motor 96 is kept fixed relative to the support 9d.
- the second end of the screw, opposite the first, is rotatably mounted in a bearing 97 also kept fixed relative to the support 9d.
- the actuating means Resting on each end upright of the device, the actuating means comprise a buttress 98a, 98b.
- Each buttress comprises a central part 980a, 980b in an inclined plane which bears on an end post and a contact zone 981a, 981b.
- a carriage 99 is mounted to move in translation on the worm 95. It rests on the contact zone 981b of the buttress 98b and integral with this contact zone.
- the pusher device 9 is in the decompressed position. In this position, the elastic means 101 are stretched, so that they store elastic energy. Furthermore, the carriage 99 is in its position closest to the bearing 97.
- the motor 96 is first actuated to drive the screw 95 in a first direction of rotation. This rotational movement causes the carriage 99 to translate along the screw, in the direction of the end post 9a. The carriage 99 then exerts a compressive force on the upright 9b via the buttress 98b. Insofar as the other end upright 9a is maintained in its initial position by virtue of the block 96a, the upright 9b approaches, like the intermediate uprights 9c, this other end upright 9a.
- the device thus assumes the compressed position illustrated in FIG. 22.
- the operation of the device 9 is reversible.
- the motor 96 can then be actuated to drive the screw 95 in a second direction of rotation, opposite to the first.
- This rotational movement causes the carriage 99 to translate along the screw away from the end post 9a.
- the carriage 99 then exerts a pulling force on the post 9b through the buttress 98b.
- the post 9b deviates, like the intermediate posts 9c, from this other end post 9a.
- the device 9 then returns to the decompressed position illustrated in FIG. 21.
- the presence of the elastic means makes it possible to distribute the traction between the columns, which ensures a harmonious separation of the columns.
- FIGs 16 to 19 are front views showing the pusher device 8 illustrated in Figure 6 used in a lifting mechanism. Some references are common with the block diagram shown in Figure 20. More precisely, the pusher device 8 is arranged to lift a load 80 (represented by an arrow representing a weight) at the end or distal part of a lever arm 81.
- a load 80 represented by an arrow representing a weight
- the arm 81 is movable in rotation about an axis 82 between a first low vertical position (FIG. 16) and a last, high vertical position (FIG. 19).
- An inextensible or almost inextensible strap 83 is tensioned on the pusher device 8, fixing its proximal end portion 830 to a base (not shown in FIG. 16) and its distal end portion 831 to the proximal part 810 of the arm 81.
- Means may be provided to block the vertical movement of the strap, for example a roller (not shown), located opposite the axis of rotation 82.
- a compressive force still continues to be exerted on the pusher device, so as to generate further upward movements of the various columns constituting the device.
- Each of these vertical movements generates a tensioning of a portion of the inextensible strap.
- Each of these tensioning depends on the height gained by each of these columns.
- FIG. 18 illustrates a subsequent step in the operation of the pusher device 8, the latter having led to a horizontal position of the lever arm 81 which continues to rotate around the axis 82 (arrow F7) to be exceeded.
- the device 9 operates with a strap which exerts a compression on it.
- the operation of the device is therefore that described with reference to Figures 7 to 10.
- Figure 19 illustrates the fully compressed state of the pusher 8, in which all the columns have reached their maximum height, as shown in Figure 10.
- the device 9 operates as if the strap was missing, because it does not compress the device.
- a lifeboat is launched differently depending on the type of boat.
- a free-fall craft is a closed craft placed on a ramp. Its launch is preceded by a vertical drop of 10 to 20 m which leads it to enter the water before returning to the surface. Because of its deceleration, when the boat enters the water, the passengers are subjected to shocks which can be traumatic.
- a davit boat can be opened or closed. Winches are provided to load the empty boat but are not always adapted to an overload of weight likely to occur during an urgent evacuation. To overcome this difficulty, a system is also provided which allows all or nothing to trigger the rotation of the davits to move the boat away from the boat and then slow down the unwinding of the suspension cable. This system is operated by means of handles. Any confusion between the handles causes a collision between the boat and the boat and risks of overturning the boat loaded with passengers.
- FIG. 23A illustrates the hull 70 of a boat on which is mounted a system 73 for maneuvering a canoe 72.
- This system includes two arms 730 and 731.
- the arm 730 is, at its proximal end 7300, mounted to be movable in rotation about an axis 732 fixed to the shell 70.
- the arm 731 is, at its proximal end 7310, mounted to be movable in rotation with respect to the arm 730, around d 'a pin 733 located at the distal end 7301 of the arm 730 opposite to the axis 732.
- the canoe 72 is hooked to the distal end 7311 of the arm 731, opposite to the axis 733, by means of a joint .
- Each of the arms 730,731 is associated with at least one pusher device 734, 735 according to the invention, associated with a strap 734a, 735a.
- the device 734 is located in the boat on a support 734b and the device 735 on the arm 730.
- the device 734 and the strap 734a form a first system for tensioning a first strap and the device 735 and the strap.
- 735a form a second tensioning system for a second strap.
- Strap 734a is tensioned on device 734 by securing its proximal end portion 7340a to support 734b and its distal end portion 7341a to the proximal portion
- Strap 735a is tensioned on device 735 by securing its proximal end portion 7350a to arm 730 and its distal end portion 7351a to proximal portion 7310 of arm 731.
- step 1 illustrated in Figure 23A the boat 72 is placed on the hull and is therefore in a stable position.
- the devices 734,735 are in the compressed position so that the two arms 730, 731 are rigid and retain their position.
- step 1 and step 2 illustrated in Figure 23B device 735 remains in the compressed position, while device 734 is gradually decompressed. This results in the arm 730 rotating clockwise about the axis 732 under the effect of gravity, the spacing between the arms 730 and 731 remaining unchanged.
- stage 2 the dinghy 72 is lifted off the hull, but it is still at least partially in line with it.
- step 2 and step 3 shown in Figure 23C device 735 begins to decompress, while device 734 continues its gradual decompression.
- the spacing between the two arms 730,731 increases, the arm 731 rotating in the anti-clockwise direction around the axis 733, in order to let the boat be positioned vertically with the axis 733, and the device 734 retaining the fall of the canoe.
- step 3 arm 730 is substantially horizontal while arm 731 is substantially vertical.
- step 3 and step 4 shown in Figure 23D the phase of lowering canoe 72 continues until it reaches the surface of the water.
- the devices 734 and 735 continue their progressive decompression. All this phase of descent is done in a controlled manner, smoothly, and the canoe is placed on the water and not dropped. This ensures the safety of the passengers, unlike known systems.
- step 1 The passengers can get into the canoe in step 1 or in step 2.
- step 2 the additional means require less energy. to ensure the launch of the canoe.
- the devices 734 and 735 can be controlled with a simple winch manually operated by one person. This can be useful in the event of a power failure on the boat.
- the present invention is not limited to the embodiments more particularly described. On the contrary, it embraces all the variants thereof, in particular that in which the structure of the pusher mechanism is modified while retaining its operating principle and in which alternative embodiments of these mechanisms are adopted.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2022515833A JP2022548225A (ja) | 2019-09-12 | 2020-09-08 | プッシャ機構及びプッシャ機構を含むストラップを引っ張るためのシステム |
CN202080063770.4A CN114364492A (zh) | 2019-09-12 | 2020-09-08 | 推进机构和具有这种机构的带张紧系统 |
US17/641,942 US20220306246A1 (en) | 2019-09-12 | 2020-09-08 | Pusher mechanism and system for tensioning a strap including such mechanisms |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1910066 | 2019-09-12 | ||
FR1910066A FR3100765B1 (fr) | 2019-09-12 | 2019-09-12 | Mécanisme pousseur et système de mise en tension d'une sangle incluant de tels mécanismes. |
Publications (1)
Publication Number | Publication Date |
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WO2021048152A1 true WO2021048152A1 (fr) | 2021-03-18 |
Family
ID=68733377
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/EP2020/075119 WO2021048152A1 (fr) | 2019-09-12 | 2020-09-08 | Mécanisme pousseur et système de mise en tension d'une sangle incluant de tels mécanismes |
Country Status (5)
Country | Link |
---|---|
US (1) | US20220306246A1 (fr) |
JP (1) | JP2022548225A (fr) |
CN (1) | CN114364492A (fr) |
FR (1) | FR3100765B1 (fr) |
WO (1) | WO2021048152A1 (fr) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1136948A (fr) * | 1955-10-24 | 1957-05-21 | Poutre repliable et ses diverses applications | |
US20030018388A1 (en) * | 2001-07-10 | 2003-01-23 | Comer Alan Elbert | Pneumatic muscle analogs for exoskeletal robotic limbs and associated control mechanisms |
FR2994685A1 (fr) * | 2012-08-22 | 2014-02-28 | Acebi | Stabilisateur de cable de manoeuvre d'une charge, telle qu'une embarcation, et installation de manutention de charge integrant un tel stabilisateur |
CN104329543A (zh) * | 2014-10-09 | 2015-02-04 | 保定标正机床有限责任公司 | 机床微调垫铁 |
FR3061057A1 (fr) * | 2016-12-28 | 2018-06-29 | Push4M | Ensemble de motorisation apte a deployer une force de traction, mise en œuvre de l'ensemble pour la motorisation d'un bras articule et procede associe |
-
2019
- 2019-09-12 FR FR1910066A patent/FR3100765B1/fr not_active Expired - Fee Related
-
2020
- 2020-09-08 JP JP2022515833A patent/JP2022548225A/ja active Pending
- 2020-09-08 WO PCT/EP2020/075119 patent/WO2021048152A1/fr active Application Filing
- 2020-09-08 US US17/641,942 patent/US20220306246A1/en active Pending
- 2020-09-08 CN CN202080063770.4A patent/CN114364492A/zh active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1136948A (fr) * | 1955-10-24 | 1957-05-21 | Poutre repliable et ses diverses applications | |
US20030018388A1 (en) * | 2001-07-10 | 2003-01-23 | Comer Alan Elbert | Pneumatic muscle analogs for exoskeletal robotic limbs and associated control mechanisms |
FR2994685A1 (fr) * | 2012-08-22 | 2014-02-28 | Acebi | Stabilisateur de cable de manoeuvre d'une charge, telle qu'une embarcation, et installation de manutention de charge integrant un tel stabilisateur |
CN104329543A (zh) * | 2014-10-09 | 2015-02-04 | 保定标正机床有限责任公司 | 机床微调垫铁 |
FR3061057A1 (fr) * | 2016-12-28 | 2018-06-29 | Push4M | Ensemble de motorisation apte a deployer une force de traction, mise en œuvre de l'ensemble pour la motorisation d'un bras articule et procede associe |
Also Published As
Publication number | Publication date |
---|---|
FR3100765B1 (fr) | 2021-09-10 |
CN114364492A (zh) | 2022-04-15 |
JP2022548225A (ja) | 2022-11-17 |
FR3100765A1 (fr) | 2021-03-19 |
US20220306246A1 (en) | 2022-09-29 |
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