WO1996025325A1 - System for opening/closing the cargo space of a dry cargo ship by means of a hatch cover - Google Patents
System for opening/closing the cargo space of a dry cargo ship by means of a hatch cover Download PDFInfo
- Publication number
- WO1996025325A1 WO1996025325A1 PCT/FI1995/000073 FI9500073W WO9625325A1 WO 1996025325 A1 WO1996025325 A1 WO 1996025325A1 FI 9500073 W FI9500073 W FI 9500073W WO 9625325 A1 WO9625325 A1 WO 9625325A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hatch cover
- ship
- guide
- sections
- cargo space
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B19/00—Arrangements or adaptations of ports, doors, windows, port-holes, or other openings or covers
- B63B19/12—Hatches; Hatchways
- B63B19/14—Hatch covers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
- B63B25/28—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for deck loads
Definitions
- the present invention relates to a method of closing/ opening the cargo space of a dry cargo ship by means of a hatch cover comprising at least one section and said ship incorporating container guides with stiffening frames mounted above the cargo space.
- Hatch covers are used to close the hatchway to the ship's cargo space, and additionally, as a part of the deck on which the on-deck cargo such as containers can be stowed.
- the container guides In modern vessels provided with container guides above the cargo space deck, the container guides must be designed to be either removable or sideways rotatable in order to facilitate the locking of the hatch cover in place, since the hatch cover is longer than the cargo space and thus also longer than the distance between the container guides. Hence, using conventional mechanisms, such a hatch cover cannot be rotated past permanently fixed container guides, nor lowered in place or lifted away in the vertical direction. Obviously, a rotatable or detach ⁇ able design of the container guides involves excessive costs, and moreover, such a design is vulnerable to damage under the conditions prevailing in harbours and at sea.
- the hatch cover could be made, e.g., from sections rendering the cover foldable at its center or telescopically retractable, whereby it could in its folded or retracted position be lowered in place and lifted away, respectively, past the fixed container guides.
- hatch cover constructions become extremely complicated, heavy and unprofitable to manufacture.
- An alternative solution is to entirely omit the container guides with the disadvantage of difficult and time- consuming securing of the containers.
- the goal of the invention is achieved by virtue of an arrangement characterized in that above the cargo space are mounted guide elements capable of forcing the hatch cover to move in an essentially horizontal direction and that said sections of the hatch cover are provided with guide members compatible with said guide elements.
- An embodiment of the invention is characterized in that the guide elements mounted on the ship's hull are comprised by rails with horizontal slots and that the guide members of the hatch cover sections are comprised by guide pins which are advantageously placed to the sides of the hatch cover facing said guide elements permanently fixed to the ship's structures and are adapted movable in said guide slots when the hatch cover is moved by means of, e.g., a quayside crane or the ship's own crane.
- hatch cover is in a conventional manner comprised of, e.g., three sections which during the opening/closing of the hatch cover are sequentially stowed/unstowed in predetermined locations under the guidance of the guide elements mounted on the sides of the ship's hatchway.
- a still further embodiment of the invention is character ⁇ ized in that the horizontal guide elements mounted on the ship's hull are provided with vertical guide slots at those points at which the guide pins of the hatch cover sections will be when the sections are correctly located in the lateral direction, whereby the hatch cover can be lowered onto the hatchway to close the cargo space.
- the hatch cover/container guide system dispenses with any mechanical actuators for the hatch covers and container guidance means.
- the equipment of the system offers maintenance-free and uncomplicated opera ⁇ tion.
- the stowage in the ship's cargo space is similar to that of an open shelter deck ship, with an additional benefit of allowing the use of the hatch covers as rain shelters above the permanently mounted container guides.
- Figure 1 shows a portion of the cargo space of a dry cargo ship in a side view
- Figure 2 shows the permanently mounted guide elements of the hatch cover viewed in the direction of the ship's longitudinal axis
- Figure 3 is a top view of a section of the hatch cover showing the location of the guide members of the hatch cover section.
- a side view is shown of a portion of the ship's cargo space 1 which is divided into one or more compartments by bulkheads 2.
- To the bulkheads are fixed cargo space container guides 3 which in practice extend from the top of the cargo space essentially to the bottom of the cargo space, though for illustrative purposes, they are shown only partially in the drawing.
- the right side cargo space 1 is shown closed by means a hatch cover 4 with the cover edges resting on bulkheads 2.
- the hatch cover is comprised of, e.g., three sections of essentially equal size, whereby the abutting sections together can close the cargo space.
- a fixed guide in the present context refers to a container guide which need not be removed or rotated aside when the hatch cover is being closed or opened.
- Containers 7 are shown stowed between the container guides on the hatch cover 4 in a conventional manner.
- the present invention is novel over the prior art in that to the frames 5 of the on-deck container guides 6 above the cargo space are fixed, e.g., by welding such essentially horizontal, cross-ship aligned control elements 8 of which a portion is shown in greater detail in Fig. 2.
- the hatch cover or each of its sections is/are provided with guide members 9 which are shown in greater detail in Fig. 3 and which in the embodiment described herein comprise four pins located close to the corners of the hatch cover section 4 so that both sides of the section have two pins.
- the pins 9 are adapted to run guided by the guide elements 8 mounted on the ship's hull, said guide elements in the discussed embodiment being comprised of rails incorporating horizontal guide slots 10.
- the pins 9 are located coincident with vertical slots 12 made to the fixed guide element, whereby the cover section 4 can be lowered with the help of a crane in place onto the upper edges of the bulkheads 2 of the cargo space 1 as shown in Fig. 1.
- the lower ends 13 of the vertical slot portions 12 of the guide elements are widened so as to permit a play between the hatch cover sections and the ship's structures due to deformation of the ship's hull.
- the vertical slot portions 12 is appropriately designed with a sufficient height that permits the sections 4 of the hatch covers to be lifted up in a desired order for transfer when several hatch cover sections are placed side by side.
- a cover section can then be lifted up with the help of a crane under the guidance of the vertical guide slot portions 12 at a proper height for horizontal transfer along the horizontal guide slots sideways off from the ship's deck can be performed, or alternatively, for stowing the cover section onto the adjacent cover section.
- the permanently fixed container guides 6 mounted above the cargo space 1 must be shortened at the lower ends so as not to interfere with the horizontal transfer of the hatch cover sections during the closing/opening of the hatchway.
- the length of the section cut off between the upper container guide 6 and the container guide 3 below it must be so short as not to impair the guidance of containers at this discontinuity.
- design of the guide elements can be varied in any suitable manner, whereby the guide slot can be made to, e.g., the hatch cover section requiring a compatible guide pin in the ship's fixed structures.
- the friction between the guide slot and the guide pin and other guidance elements can be reduced when necessary using conventional methods including friction-reducing materials, mechanical low-friction slide elements and others.
Abstract
The present invention relates to a system for closing/opening the cargo space (1) of a dry cargo ship by means of a hatch cover (4) comprising at least one section and said ship incorporating container guides (6) with stiffening frames (5) mounted above the cargo space. The invention is implemented by mounting on the stiffening frame (5) of the container guides (6) located above the cargo space (1) such guide elements (8, 10) that are capable of forcing the hatch cover to move in an essentially horizontal direction and providing said sections of the hatch cover with guide members (9) compatible with said guide elements (8, 10).
Description
r
System for opening/closing the cargo space of a dry cargo ship by means of a hatch cover
The present invention relates to a method of closing/ opening the cargo space of a dry cargo ship by means of a hatch cover comprising at least one section and said ship incorporating container guides with stiffening frames mounted above the cargo space.
Hatch covers are used to close the hatchway to the ship's cargo space, and additionally, as a part of the deck on which the on-deck cargo such as containers can be stowed.
Conventionally, in modern vessels provided with container guides above the cargo space deck, the container guides must be designed to be either removable or sideways rotatable in order to facilitate the locking of the hatch cover in place, since the hatch cover is longer than the cargo space and thus also longer than the distance between the container guides. Hence, using conventional mechanisms, such a hatch cover cannot be rotated past permanently fixed container guides, nor lowered in place or lifted away in the vertical direction. Obviously, a rotatable or detach¬ able design of the container guides involves excessive costs, and moreover, such a design is vulnerable to damage under the conditions prevailing in harbours and at sea.
Theoretically, the hatch cover could be made, e.g., from sections rendering the cover foldable at its center or telescopically retractable, whereby it could in its folded or retracted position be lowered in place and lifted away, respectively, past the fixed container guides. In practice, however, such hatch cover constructions become extremely complicated, heavy and unprofitable to manufacture.
An alternative solution is to entirely omit the container guides with the disadvantage of difficult and time- consuming securing of the containers.
It is an object of the present invention to provide such a system for closing/opening the cargo space of a dry cargo ship by means of a hatch cover in which system permanently fixed container guides can be used above the cargo space. The goal of the invention is achieved by virtue of an arrangement characterized in that above the cargo space are mounted guide elements capable of forcing the hatch cover to move in an essentially horizontal direction and that said sections of the hatch cover are provided with guide members compatible with said guide elements.
An embodiment of the invention is characterized in that the guide elements mounted on the ship's hull are comprised by rails with horizontal slots and that the guide members of the hatch cover sections are comprised by guide pins which are advantageously placed to the sides of the hatch cover facing said guide elements permanently fixed to the ship's structures and are adapted movable in said guide slots when the hatch cover is moved by means of, e.g., a quayside crane or the ship's own crane.
Another embodiment of the invention is characterized in that the hatch cover is in a conventional manner comprised of, e.g., three sections which during the opening/closing of the hatch cover are sequentially stowed/unstowed in predetermined locations under the guidance of the guide elements mounted on the sides of the ship's hatchway.
A still further embodiment of the invention is character¬ ized in that the horizontal guide elements mounted on the ship's hull are provided with vertical guide slots at those points at which the guide pins of the hatch cover sections will be when the sections are correctly located in the
lateral direction, whereby the hatch cover can be lowered onto the hatchway to close the cargo space.
The hatch cover/container guide system according to the invention dispenses with any mechanical actuators for the hatch covers and container guidance means. The equipment of the system offers maintenance-free and uncomplicated opera¬ tion. Moreover, the stowage in the ship's cargo space is similar to that of an open shelter deck ship, with an additional benefit of allowing the use of the hatch covers as rain shelters above the permanently mounted container guides.
The invention is next examined with reference to the appended drawings, in which:
Figure 1 shows a portion of the cargo space of a dry cargo ship in a side view;
Figure 2 shows the permanently mounted guide elements of the hatch cover viewed in the direction of the ship's longitudinal axis; and
Figure 3 is a top view of a section of the hatch cover showing the location of the guide members of the hatch cover section.
With reference to Fig. 1, a side view is shown of a portion of the ship's cargo space 1 which is divided into one or more compartments by bulkheads 2. To the bulkheads are fixed cargo space container guides 3 which in practice extend from the top of the cargo space essentially to the bottom of the cargo space, though for illustrative purposes, they are shown only partially in the drawing.
With a further reference to Fig. 1, the right side cargo space 1 is shown closed by means a hatch cover 4 with the
cover edges resting on bulkheads 2. The hatch cover is comprised of, e.g., three sections of essentially equal size, whereby the abutting sections together can close the cargo space.
Above the cargo space, to the side of the free-moving end of the hatch cover 4 on the ship's hull are adapted fixed container guides 6 with their stiffener frames 5. A fixed guide in the present context refers to a container guide which need not be removed or rotated aside when the hatch cover is being closed or opened. Containers 7 are shown stowed between the container guides on the hatch cover 4 in a conventional manner.
The present invention is novel over the prior art in that to the frames 5 of the on-deck container guides 6 above the cargo space are fixed, e.g., by welding such essentially horizontal, cross-ship aligned control elements 8 of which a portion is shown in greater detail in Fig. 2. Correspond- ingly, the hatch cover or each of its sections is/are provided with guide members 9 which are shown in greater detail in Fig. 3 and which in the embodiment described herein comprise four pins located close to the corners of the hatch cover section 4 so that both sides of the section have two pins. The pins 9 are adapted to run guided by the guide elements 8 mounted on the ship's hull, said guide elements in the discussed embodiment being comprised of rails incorporating horizontal guide slots 10.
The unstowing of the hatch cover sections in place, that is, closing of the cargo space hatchway takes place so that a hatch cover section is transferred by means of a quayside crane or the ship's own crane to the height of the guide element 8 fixed to the ship's hull and the guide pins 9 of the hatch cover section 4 are introduced into the guide slot 10. The introduction of the pins into the guide slots is aided by the flared slot entrance 11 of the guide
element 8. Thus, the hatch cover sections will be properly located in the slots even if the ship would be in an inclined position. After the pins 9 are introduced into the slot 10, the hatch cover section is moved with the help of a crane under the guidance of the slot to the proper location of the cover section. Here, the pins 9 are located coincident with vertical slots 12 made to the fixed guide element, whereby the cover section 4 can be lowered with the help of a crane in place onto the upper edges of the bulkheads 2 of the cargo space 1 as shown in Fig. 1. The lower ends 13 of the vertical slot portions 12 of the guide elements are widened so as to permit a play between the hatch cover sections and the ship's structures due to deformation of the ship's hull. Further, the vertical slot portions 12 is appropriately designed with a sufficient height that permits the sections 4 of the hatch covers to be lifted up in a desired order for transfer when several hatch cover sections are placed side by side. To open the hatch covers, a cover section can then be lifted up with the help of a crane under the guidance of the vertical guide slot portions 12 at a proper height for horizontal transfer along the horizontal guide slots sideways off from the ship's deck can be performed, or alternatively, for stowing the cover section onto the adjacent cover section.
For proper function of the guidance system the permanently fixed container guides 6 mounted above the cargo space 1 must be shortened at the lower ends so as not to interfere with the horizontal transfer of the hatch cover sections during the closing/opening of the hatchway. However, the length of the section cut off between the upper container guide 6 and the container guide 3 below it must be so short as not to impair the guidance of containers at this discontinuity.
To those versed in the art it is obvious that the invention is not limited to the embodiments described above, but
rather, can be varied within the scope of the invention which is defined in the appended claims. Accordingly, design of the guide elements can be varied in any suitable manner, whereby the guide slot can be made to, e.g., the hatch cover section requiring a compatible guide pin in the ship's fixed structures. Obviously, the friction between the guide slot and the guide pin and other guidance elements can be reduced when necessary using conventional methods including friction-reducing materials, mechanical low-friction slide elements and others.
Claims
1. A system for closing/opening the cargo space (1) of a dry cargo ship by means of a hatch cover (4) comprising at least one section and said ship incorporating container guides (6) with stiffening frames (5) mounted above the cargo space, c h a r a c t e r i z e d in that to the stiffening frame (5) of the container guides (6) located above the cargo space (1) are mounted guide elements (8, 10) capable of forcing the hatch cover to move in an essentially horizontal direction and that said sections of the hatch cover are provided with guide members (9) compatible with said guide elements (8, 10).
2. A system as defined in claim 1, c h a r a c t e r ¬ i z e d in that said guide elements permanently fixed to the ship's hull are comprised by rails (8) with horizontal slots (10) and that the guide members of the hatch cover (4) sections are comprised by guide pins (9) which are advantageously placed to the sides of the hatch cover facing said guide elements permanently fixed to the ship's structures and which pins (9) are adapted movable in said guide slots (10) when the hatch cover is moved by means of a quayside crane or the ship's own crane.
3. A system as defined in claim 1 or 2, c h a r a c ¬ t e r i z e d in that said hatch cover (4) in a conventional manner is formed by, e.g., three sections which are alternately transferred from the side of the ship under the guidance of the guide elements (8, 10) mounted on the ship's hull to the proper places designed for the hatch cover sections.
4. A system as defined in any of claims 1-3, c h a r - a c t e r i z e d in that the horizontal guide elements
(10) mounted on the ship's hull are provided with vertical guide slots (12) at the points at which the guide pins (9) of the sections of the hatch cover (4) will coincide when the sections are correctly located in the lateral direction for the lowering of the hatch cover onto the hatchway to close the cargo space.
5. A system as defined in claim 4, c h a r a c t e r ¬ i z e d in that the vertical slot portions (12) of the guide elements are widened at their lower ends (13) so as to permit a lateral play of the guide pin (9) in the slot and thus a lateral play of the hatch cover section (4) .
6. A system as defined in any of claims 1-5, c h a r ¬ a c t e r i z e d in that the entrance of the horizontal guide slot (10) is provided with a flared slot entrance (11) to aid the location of the hatch cover (4) .
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/FI1995/000073 WO1996025325A1 (en) | 1995-02-15 | 1995-02-15 | System for opening/closing the cargo space of a dry cargo ship by means of a hatch cover |
| AU17086/95A AU1708695A (en) | 1995-02-15 | 1995-02-15 | System for opening/closing the cargo space of a dry cargo ship by means of a hatch cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/FI1995/000073 WO1996025325A1 (en) | 1995-02-15 | 1995-02-15 | System for opening/closing the cargo space of a dry cargo ship by means of a hatch cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1996025325A1 true WO1996025325A1 (en) | 1996-08-22 |
Family
ID=8556604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FI1995/000073 WO1996025325A1 (en) | 1995-02-15 | 1995-02-15 | System for opening/closing the cargo space of a dry cargo ship by means of a hatch cover |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU1708695A (en) |
| WO (1) | WO1996025325A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2581301A1 (en) * | 2011-10-10 | 2013-04-17 | IPP Ingenieur Partner Pool GmnH | Containers stowage device |
| CN105905261A (en) * | 2016-06-27 | 2016-08-31 | 中海工业(江苏)有限公司 | Vertical general assembly jig frame for container ship lashing bridge |
| DE102021107023A1 (en) | 2021-03-22 | 2022-09-22 | Ulrich Malchow | Device and method for limiting the movement of containers on a ship's hatch cover and ship with such a device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE449077B (en) * | 1983-02-14 | 1987-04-06 | Macgregor Navire Ab | Ship deck hatch arrangement |
-
1995
- 1995-02-15 WO PCT/FI1995/000073 patent/WO1996025325A1/en active Application Filing
- 1995-02-15 AU AU17086/95A patent/AU1708695A/en not_active Abandoned
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE449077B (en) * | 1983-02-14 | 1987-04-06 | Macgregor Navire Ab | Ship deck hatch arrangement |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2581301A1 (en) * | 2011-10-10 | 2013-04-17 | IPP Ingenieur Partner Pool GmnH | Containers stowage device |
| CN105905261A (en) * | 2016-06-27 | 2016-08-31 | 中海工业(江苏)有限公司 | Vertical general assembly jig frame for container ship lashing bridge |
| DE102021107023A1 (en) | 2021-03-22 | 2022-09-22 | Ulrich Malchow | Device and method for limiting the movement of containers on a ship's hatch cover and ship with such a device |
| WO2022199746A1 (en) | 2021-03-22 | 2022-09-29 | Ulrich Malchow | Device and method for limiting the mobility of containers on a hatch cover of a ship, and ship comprising such a device |
Also Published As
| Publication number | Publication date |
|---|---|
| AU1708695A (en) | 1996-09-04 |
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