FI121418B - Operating mechanism for a cargo hatch in a cargo ship - Google Patents

Description

BACKGROUND OF THE INVENTION This invention relates to a mechanism for operating a cargo hatch of a ship, and in particular a cargo ship. Cargo ships typically have one or more hatch covers consisting of one or more hatch cover panels, which hatch panels are movable to cover or open the ship's cargo space, i. hold. Thus, the hatch door actuator mechanism of the invention can move said hatch panels between their open and closed positions so that the ship's cargo hold can be opened or closed.

Great force is needed especially when closing the hatches, since the seal between the hatch covers must be compressed and on the other hand when the hatches have to be lifted up to the driving position.

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The invention thus relates to the opening and closing of the cargo hatches of a cargo ship by means of an actuator.

Known solutions

Some different solutions are known about the mechanisms for operating cargo hatch covers.

The hatch access control apparatus has traditionally been implemented in such a way that the lifting and lowering of the hatch panels 25 and the actual actuation of the hatch panels are accomplished by separate devices.

The lifting and lowering movement is typically accomplished, for example, by a cylindrical lever mechanism, which is conventionally two pieces per hatch pair, or by a circular crimping tool having 8 pieces per hatch pair.

In turn, the hatch covers are driven by, for example, a rack-and-pinion drive, which is low in power and power, because the hatch panels roll with their wheels on a flat track.

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Locking of hatch covers is typically accomplished by separate handheld latches or locking latches, several of which are in one hatch panel.

5 A solution for the operation of the cargo hatch hatch mechanism is disclosed in Fl 20060604, in which the hinge bars mounted on the panels allow the hatch panels to be moved.

The known solutions have certain weaknesses and drawbacks. Apparatuses of known solutions require several separate devices for lifting and lowering hatch covers and driving, which is undesirable because the equipment becomes more easily malfunctioning, complex, and hence the need for maintenance increases.

Brief Description of the Invention

The drive mechanism according to the invention is characterized by what is mentioned in the characterizing part of claim 1.

The drive mechanism according to the invention is also characterized by what is stated in claims 2-10.

The invention discloses a mechanism for operating hatch covers (particularly so-called side rollers) which allows the conventional actuator (hydraulic or electric motor) 25 to be used as the sole actuator when the hatch panels are opened and closed. The solution according to the invention provides the great force required to close the hatches, since the seal between the hatch panels must be compressed and, on the other hand, when the hatches are opened, when the hatch panels have to be raised to the running position. This mechanism also allows the auto-30 to lock it in the closed position.

The drive mechanism according to the invention is implemented in such a way that the actuator is attached to a guide carriage sliding in the guide rails which, when moving through the lever mechanism 3, raises the cargo hatch to the driving position. After lifting, the actuator pulls the tailgate open using a toothed bar attached to the tailgate.

The solution according to the invention has certain advantages when compared with known solutions.

The solution according to the invention provides a drive mechanism which enables all driving functions (lifting / lowering and driving) to be performed by a single low-power actuator (one actuator per hatch panel).

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The solution according to the invention is suitable for both hydraulic and electric motor operation.

The solution according to the invention simplifies the installation and maintenance of the hatches, and is simple, inexpensive and reliable in its construction.

DETAILED DESCRIPTION OF THE INVENTION

The solution of the invention is described in more detail below with reference to Figs. 1-6c, in which Fig. 1a shows a side view of the drive mechanism.

Fig. 1b shows a top view of the drive mechanism (Fig. 1a) with the slide carriage in position A with the hatch panel closed to close the cargo space.

Figure 2a is a side view of the drive mechanism.

Fig. 2b shows a top view of the drive mechanism (according to Fig. 2a) with the slide carriage in position B, with the hatch panel in the driving position (travelable intermediate position).

Fig. 3a is a side view of the drive mechanism.

Fig. 3b shows a top view of the drive mechanism (according to Fig. 3a) with the slide carriage with the hatch panel in a runnable intermediate position.

Figures 4a and 4b show a situation in which the hatch covers, i.e. hatch panels, are in the closed position. Figure 4a is a side view of the solution of the invention 10, and Figure 4b is a top view of the solution of the invention.

Figures 5a and 5b illustrate a situation in which the cargo hatches, i.e. hatch panels, are in a movable intermediate position. Fig. 5a shows said situation 15 from the side, and Fig. 5b from above.

Figures 6a and 6b show a situation in which the cargo hatches, i.e. the hatch panels, are in the fully open position. Figure 6a is a side view, and Figure 6b is a top view of a situation where the hatch panels are completely open 20.

1a and 1b, the drive mechanism 25 according to the invention is implemented by means of a slide 1 and pivoting arms 2 and 3. The slide 1 moves on one or more rails or rails 4 (left runner 4 ', 25 runner 4') attached to the hull of the ship. The lever arm 2 is pivotally attached to the slider by a joint 14 and the lever arm 3 is pivotally attached to the body 13 of the ship, for example, directly or otherwise. The link arms 2,3 are also pivotally mounted, with a joint 15 connected to one another. The actuator 5 attached to the slide carriage shown in Fig. 1b, such as an electric or hydraulic drive, rotates the gear wheel 6, and further 30 the gear wheel 11 when in contact with the gear wheel 6. The gearing of the gears is illustrated by reference numerals 20 and 21. the rotation of the gearwheel 6, when in contact with the toothed rack, causes the slide carriage 1 5 to be displaced, which in turn pivots the pivoting levers 2 and 3. The upper end 8 of the lever arm 3 is connected to the groove 9, When the slide carriage is moved from position A to position B as shown in Figures 1a and 1b and further illustrated in Figures 2a and 2b, the cargo hatch 5, i.e., hatch panel 19, rises to the driving position (intermediate position) as described above. with anism. At the same time, the hatch castor wheels 16 (shown in Figures 4a, 4b) are raised on fixed wheel tracks 22, allowing the hatch panel to be driven over said tracks.

1a and 1b are automatically locked without separate actuators since the pin 10 attached to the hatch panel in the closed position is supported by a groove 9 on the upper end of the lever arm 3, and the pin 10 does not exert forces to rotate the lever 3 into the hinge because of.

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3a and 3b, as the slide carriage approaches position B, the contact of the gear wheel 6 with the gear rack 7 is disengaged, while the gear wheel rotated by the gear wheel 6 engages the gear rack 12 attached to the hatch panel. Moving the door-20 panel back to the closed position occurs by reversing the direction of rotation of the gears so that the above steps are repeated in the reverse order.

Figures 4a and 4b show the situation according to Fig. 1a, in which the cargo hatches, i.e., the Luuk-25 cover panels, are in the closed position. Hereby, the wheels 16 mounted on the hatch panels, on which the hatch panels may move, are provided in grooves 17 which are formed in the hull of the ship, or in which the wheel tracks 22 and said grooves are made directly or indirectly on the hull.

The hatch panels 18 and 19 are tight against each other and have seals 24 at their ends 30 which are pressed against each other to prevent water or dirt from entering into the cargo space 23.

Figures 5a and 5b show the situation according to Fig. 2a, in which the hatch covers are in a runnable intermediate position, i.e. the wheels 16 are raised from the grooves 17 on the track 22 and the hatch panels are movable by the drive mechanism 25 according to the invention. The hatch panels can be moved lightly over said webs because the wheels take up the weight of the hatch panels 18.19.

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Figures 6a and 6b show a side and top view of the cargo hatches 18 and 19 in the open position, i.e. not covering the cargo space 23, that is, the ship's cargo space at all. The cargo hatches are moved into the position shown in the figure by means of a drive mechanism 25, and the cargo hatches are shown in the second extreme position, i.e. 10 as far apart as possible. The grooves 17 shown in the figure, into which the wheels 16 fitted to the cargo hatches 18,19 are accessible, are substantially vertical on one side and inclined on the other side, whereby the wheels are raised (hatch covers) by the drive mechanism 25.

It will be apparent to one skilled in the art that the invention is not limited to the above examples, but that it may be varied within the scope of the appended claims.

It is also possible to implement the solution according to the invention by using only one lever arm connected to the slide carriage, which can be used to raise or lower the hatch panels.

The mechanism according to the invention can also be implemented by replacing the lever arms, for example, with tooth segments. The position of the pivot points and the dimensions and position of mecca-25 nism can also be changed as needed. Further, the use of a toothed bar can be replaced by, for example, chain, friction wheel or cable traction equipment.

In the solution of the invention, each hatch panel may consist of one or more pieces connected or joined to one another.

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Claims (9)

A drive mechanism (25) for a cargo hatch for a cargo ship, said cargo hatch comprises of at least one hatch panel (18, 19), which hatch panel can be moved between an open and a closed position which opens and closes the cargo hold (23) ), and there is provided in the hatch panel or adjacent to the at least one drive device which causes the movement between the open and closed positions of the hatch panel, characterized in that the hatch panel can be lifted to a driving position and lowered to a welding position by a sliding slide (1), which is arranged to slide along a guide or guides (4 ', 4 ") in the hull of the ship, and by means of the sliding carriage and at least a directly or indirectly coupled articulated arm (2, 3) or a gear segment. Drive mechanism according to claim 1, characterized in that the arm (3) directly or indirectly axially, as with an axle (13), is fitted into the hull of the ship and to the other arm (2) so that the door panel can be lifted and lowered. with the arm (3) as the slider moves. Drive mechanism according to claim 1 or 2, characterized in that the sliding sleeve is provided with at least two gears (6, 11) which can be engaged with a rack (12) in the guide (4) and / or in the door panel, that the door panel moves. Drive mechanism according to claim 3, characterized in that the direction of rotation of the gears (6, 11) can be changed so that the door panel can be moved between its open and closed position. Drive mechanism according to claim 1, characterized in that the hatch panel 30 is provided with a toothed bar (12) directed in the direction of movement of the hatch panel or a threaded bar for moving the hatch panel. Drive mechanism according to claim 1, characterized in that one end of the arm (3) is provided with a lock or recess (9) in which a pin (10) or a projection in the door panel (18, 19) fits so that the door panel can be lifted eaten and / or lowered and read with the arm (3). Drive mechanism according to claim 3 or 4, characterized in that at least one gear is driven by an electric or hydraulic drive (5) arranged in the sliding slide. Drive mechanism according to claim 1, characterized in that the arms (2, 3) are arranged on the side or sides of the slider (1). 10 Drive mechanism according to claim 1, characterized in that the hatch panel is provided with a threaded rod directed in the direction of movement of the hatch panel. Drive mechanism according to claim 1, characterized in that a chain, friction wheel or cable pull device for moving the hatch panel is coupled to the hatch panel 15.