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The present invention relates to a total closure system for a ship door or the like.
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A ship hold for storing at least one tender or the like comprises a door, provided in a wall and closed at least partially by means of at least one hatch, and also comprises at least a part of deck forming the ceiling of the hold and a floor.
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A known ship hold for storing a tender or the like is provided with a horizontal translation system for the movement of the tender. Said known system comprises command means for moving the tender from inside to outside the ship, and vice versa.
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In particular, from
EP 3 636 537 A1 it is known a ship hold comprising at least one translator-elevator device, configured to move in vertical direction and translate in horizontal direction at least one tender and including:
- support and guide means, fixed with respect to the ceiling of the hold,
- carriage means, which support at least one hatch at a first end and which are supported movable with respect to said support and guide means, in a direction parallel with respect to a vertical median plane of said door, between a first operating arrangement, in which said first end of said carriage means is arranged inside said hold and said at least one hatch at least partially closes said door, and a second operating arrangement, in which said first end of said carriage means is extended through said door to the outside of said hold and said door is open.
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In particular, said carriage means are moved by means of electromechanical actuator means, comprising at least one electric gear motor group, and configured so that, once the gear motor group is stopped and the hatch is closed, the movement system is irreversible.
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Moreover, the hatch, when closing, must compress a hermetic sealing gasket inserted all around the perimeter of the door. The effort to compress the gasket is always greater than the force of the electric actuator means, in particular of the electric gear motor group, which move the carriage means that carry the hatch.
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Said carriage means, when performing the hatch closing stroke, bring the hatch only into contact with the perimeter gasket of the door without applying the force necessary for the watertight deformation of said gasket.
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Once the closing movement of the carriage means is stopped, in the irreversible movement system, the total closure of the hatch takes place by means of the insertion of electromechanical shutters (so-called dogs) into corresponding seats positioned perimetrically to the door and which act on the hatch. The action of the shutters moves the hatch compressing the sealing gasket. In such condition, the carriage means are not yet completely retracted into the ship's hold.
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However, said carriage means, even if the transmission is irreversible, must still be able to completely retract into the hold, performing a return stroke equal to the closing movement of the hatch determined by the insertion of the shutters into their respective seats.
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An object of the present invention is to provide a total closure system for a ship door or the like, which allows said carriage means, even with an irreversible transmission, to completely retract into the hold, performing a return stroke equal to the closing movement of the hatch determined by the insertion of the shutters into their respective seats.
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In view of said object, the present invention provides a total closure system for a ship door or the like, characterized in that, to allow said carriage means such return movement, the gear motor group is mounted on an arrangement of sliding means with spring-assisted return which allow said carriage means to move and perform such return movement.
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Further advantageous features of the invention are described in the dependent claims.
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Other features and advantages of the invention result from the following detailed description of an embodiment with reference to the attached drawing, which shows important details for the invention, as well as from the claims. The features illustrated here must not necessarily be understood to scale and are represented in such a way that the peculiarities according to the invention are clearly highlighted. The different features can be implemented individually or in any combination among them, as variants of the invention.
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In particular, the total closure system of a door of a ship hold, for storing at least one tender or the like, comprises:
- a door, provided in a wall of the ship hold, having a perimeter sealing gasket and closed at least partially by means of at least one hatch, and a part of deck forming the ceiling of the hold;
- a horizontal translation system for moving the tender with respect to said ship hold, wherein said system comprises at least one translator-elevator device, configured to move in vertical direction and translate in horizontal direction at least one tender and including:
- support and guide means, fixed with respect to the ceiling of the hold,
- carriage means, which support said at least one hatch at a first end and which are supported movable with respect to said support and guide means, in a direction parallel with respect to a vertical median plane of said door, between a first operating arrangement, in which said first end of said carriage means is arranged inside said hold and said at least one hatch at least partially closes said door, and a second operating arrangement, in which said first end of said carriage means is extended through said door to the outside of said hold and said door is open, wherein:
said carriage means are moved by electromechanical actuator means, comprising at least one electric gear motor group, and are configured so that, once the gear motor group is stopped and the hatch is closed, the total closure of the hatch occurs irreversibly by means of the insertion of electromechanical shutters into corresponding seats positioned perimetrically to the door and which act on said hatch, so that the action of the shutters moves the hatch, so that it compresses the sealing gasket, while the carriage means still have to fully retract into the hold, performing a return stroke for closing the hatch determined by the insertion of the shutters into their respective seats.
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According to the invention, said electric gear motor group (13) is mounted on an arrangement of sliding means with spring-assisted return, which allows said carriage means to move and perform said return stroke.
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Said system is further characterized in that:
said carriage means support said hatch at said first end, while at a second end, opposite said first end, they support said electric gear motor group for moving the carriage means, wherein said electric gear motor group:
- drives in rotation a trapezoidal screw, kinematically coupled in a corresponding nut fixed with respect to said support and guide means, determining the selective to-and-fro sliding of the carriage means with respect to said fixed support and guide means;
- is connected to said second end of said carriage means by means of said arrangement of sliding means with spring-assisted return, wherein:
- a plurality of through holes is provided in said gear motor group and each hole has its respective axis oriented parallel to the movement direction of the carriage means with respect to said fixed support and guide means,
- in each of said through holes a corresponding straight rod is engaged in a freely sliding manner,
- each rod is fixed, at a respective first distal end from said gear motor group, to a support plate of said arrangement of sliding means with spring-assisted return, while a second end of each rod projects outside the corresponding hole and has a fixed stop head;
- between said gear motor means and said support plate elastic means are arranged, configured to be elastically loaded when said gear motor group and said support plate move reciprocally closer, and
- said carriage means, during the step of sealed closure of the hatch by means of insertion of the shutters into the respective seats, carry out a movement, which corresponds to the reverse movement distance of said carriage means with respect to said support and guide means required for sealed closure of the hatch with
- respect to the door, through the action of the respective shutters.
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In particular, a corresponding helical spring is mounted coaxially and slidably on each rod.
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In the attached drawing:
- Fig. 1 is a side elevation view of carriage means, movably supported with respect to fixed support and guide means and suspended from the ceiling of a hold, wherein said carriage means support at least one hatch at a first end (front end), provided for closing a door, while at a second end (rear end) they support an electric gear motor group for moving the carriage means and mounted on an arrangement of sliding means with spring-assisted return, wherein said carriage means are not subjected to axial thrust determined by the insertion of shutters positioned perimetrically to said door for the sealed closure of the hatch;
- Fig. 2 is a view similar to fig. 1, but in which said carriage means are subjected to axial thrust determined by the insertion of shutters positioned perimetrically to said door for the sealed closure of the hatch;
- Fig. 3 is a detailed and sectional view of said gear motor group mounted on said arrangement of sliding means with spring-assisted return, in the position of the carriage means shown in fig. 1;
- Fig. 4 is a detailed and elevation view of said gear motor group mounted on said arrangement of sliding means with spring-assisted return, in the position of the carriage means shown in fig. 2;
- Fig. 5 is a perspective view of said gear motor group mounted on said arrangement of sliding means with spring-assisted return according to fig. 3;
- Fig. 6 is a perspective view of said gear motor group mounted on said arrangement of sliding means with spring-assisted return according to fig. 4.
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With reference to the drawing, 10 denotes the total closure system for a ship door or the like.
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Said system 10 comprises:
carriage means 11, movably supported with respect to fixed support and guide means 12 and suspended from the ceiling of a hold, wherein:
said carriage means 11 support at a first end 11.1 (front end) a hatch S, provided for closing a door, while at a second end 11.2 (rear end) they support an electric gear motor group 13 for moving the carriage means 11, mounted on an arrangement 14 of sliding means with spring-assisted return.
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In particular, said gear motor means 13 are connected to said rear end 11.2 of said carriage means 11 by means of said arrangement 14 of sliding means with spring-assisted return, wherein:
- said gear motor means 13 drive in rotation (selectively in both directions) a trapezoidal screw (not shown), kinematically coupled in a corresponding nut (not shown), fixed for example with respect to said fixed support and guide means 12. In this way, they determine the selective to-and-fro sliding of the carriage means 11 with respect to said fixed support and guide means 12. It is emphasized that the system is irreversible;
- said gear motor means 13 are provided with a plurality of through holes 13.1, with axis oriented parallel to the direction of movement of the carriage means 11 with respect to said fixed support and guide means 12 (i.e., a direction parallel to the floor and to the longitudinal vertical median plane of the door). In each of said through holes 13.1 a corresponding straight rod 13.2 is engaged in a freely sliding manner. Each rod 13.2 is fixed, at a respective first end distal from said gear motor means 13, to a support plate 14.1 of said arrangement 14 of sliding means with spring-assisted return. The second end of each rod 13.2 projects outside the corresponding hole 13.1 and has a fixed stop head 13.3.
- Between said gear motor means 13 and said support plate 14.1 elastic means 15 are arranged, in particular on each rod 13.2 a corresponding helical spring is slidably mounted, configured to be elastically loaded when said gear motor means 13 and said support plate 14.1 move mutually closer, particularly when the carriage means 11, during the sealed closure phase of the hatch S by means of insertion of the respective shutters, are subjected to an axial thrust in the direction F (fig. 2).
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As illustrated in figures 1 and 2, the distance "C" is the stroke of the hatch S when the shutters enter their respective seats, and said support plate 14.1 and said gear motor means 13 move closer together.
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The displacement indicated with "D" in figures 1 and 2 corresponds to the retraction distance of the carriage means 11 with respect to the support and guide means 12 necessary for the sealed closure of the hatch S with respect to the door, by action of the respective shutters.
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As results from the above, the present invention provides a total closure system for a ship door or the like, which achieves in a simple and effective way the purposes set out above.