Installation structure of a ceiling device for a ship and a ceiling device

Abstract

This invention discloses an installation structure and a ceiling device for marine installation. The installation structure includes a first connecting part and a second connecting part. The second connecting part includes a first hanger and a second hanger. One end of the first connecting part is welded to the top plate, and the other end is hinged to the first hanger. The first hanger has a first groove inside. The second hanger has a first end and a second end opposite to each other. The first end is slidably disposed in the first groove, and the second end extends through the opening of the first groove to the outside of the first hanger. The second end is used to connect to the ceiling device. The first and second connecting parts of this invention are rotatably hinged, allowing the second connecting part to rotate relative to the first connecting part under gravity. This ensures that the perpendicular bisectors of all the second connecting parts are perpendicular to the floor. Furthermore, the second hangers can slide relative to the first hangers, ensuring that the second ends of the second hangers of all the second connecting parts are at the same horizontal height, thereby achieving a single horizontal installation of the device body.

Description

Technical Field

[0001] This invention relates to the field of marine technology, and in particular to an installation structure and a ceiling device for marine ceiling systems. Background Technology

[0002] Currently, fan coil units, air conditioning units, and other equipment are typically suspended from the ceiling of ship cabins. Generally, during the early stages of shipbuilding, the hoisting rods are pre-installed and welded to the underside of the ceiling. Later, after the ceiling is installed and space is reserved for the equipment, it is horizontally installed onto the hoisting rods through this space, ensuring a snug fit. However, due to installation or manufacturing errors, the ceiling surface may be uneven, causing multiple hoisting rods welded to the underside of the ceiling to be at different heights. This results in the equipment being installed at an angle, preventing horizontal installation. Consequently, this can lead to incompatibility between the equipment and external piping, or a poor fit between the equipment and the ceiling. If these problems occur, hot work such as cutting and welding is required to adjust the hoisting rods, which is time-consuming and labor-intensive. Summary of the Invention

[0003] One objective of this invention is to provide an installation structure for marine ceiling equipment that is simple in structure and can ensure that the ceiling equipment is always installed horizontally, thereby avoiding the need for hot work to adjust the lifting rods.

[0004] Another objective of this invention is to provide a ceiling-mounted device that can be horizontally installed below the roof of a ship's cabin, avoiding the need for hot work due to installation misalignment, and thus helping to save costs.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] In a first aspect, an installation structure for a marine ceiling device is provided, used to suspend the device body of the ceiling device below the roof of the ship's cabin. The installation structure includes a locking member, a first connecting part, and a plurality of second connecting parts. The second connecting parts include a first lifting rod and a second lifting rod. One end of the first connecting part is welded to the roof, and the other end of the first connecting part is hinged to the first lifting rod. The locking member is used to restrict the relative rotation of the first connecting part and the first lifting rod. The first lifting rod has a first sliding groove inside. The second lifting rod has a first end and a second end opposite to each other. The first end is slidably disposed in the first sliding groove, and the second end extends through the opening of the first sliding groove to the outside of the first lifting rod. The second end is used to connect the ceiling device.

[0007] As a preferred embodiment of the installation structure for marine ceiling equipment, the second hanger is wedge-shaped, and its cross-sectional area gradually decreases along the direction from the first end to the second end. The second connection part also includes a fastener. The side wall of the first hanger is provided with a connection hole, and the fastener passes through the connection hole, extends into the first groove, and abuts against the side wall of the second hanger.

[0008] As a preferred embodiment of the installation structure for marine ceiling equipment, the side wall of the second hanger includes at least one inclined surface and multiple planes. The fastener abuts against the inclined surface. One of the planes and the groove wall of the first sliding groove is provided with a first limiting protrusion, and the other of the planes and the groove wall of the first sliding groove is provided with a limiting groove that cooperates with the first limiting protrusion. The first limiting protrusion is slidably disposed in the limiting groove.

[0009] As a preferred embodiment of the installation structure for marine ceiling equipment, the opening of the first slide groove is provided with a second limiting protrusion protruding towards the center of the first slide groove to prevent the second hanger from disengaging from the first slide groove.

[0010] As a preferred embodiment of the installation structure for marine ceiling equipment, the hinge includes a hinge seat and a connecting rod. The hinge seat is provided with a second sliding groove that extends horizontally to the first connecting part of the first rod. One end of the connecting rod is provided with a sliding part that is slidably disposed in the second sliding groove. The other end of the connecting rod is hinged to the hinge seat.

[0011] As a preferred embodiment of the installation structure for marine ceiling equipment, the second slide groove has a third limiting protrusion protruding towards the center near the groove opening. Part of the sliding part abuts against the third limiting protrusion. The middle part of the hinge is threadedly connected to a first limiting nut, which is located outside the second slide groove. The first limiting nut can be screwed to abut against the side of the third limiting protrusion away from the sliding part.

[0012] As a preferred embodiment of the installation structure for marine ceiling equipment, an elastic damping element is provided between the groove wall of the second chute and the sliding part.

[0013] As a preferred embodiment of the installation structure for marine ceiling equipment, the locking element is a second limiting nut. A rotating shaft is rotatably mounted on the hinge seat. The rotating shaft is connected to the connecting rod. Both ends of the rotating shaft are located outside the hinge seat and are respectively screwed with the second limiting nut. The second limiting nut can be screwed and pressed against the side wall of the hinge seat to restrict the rotation of the rotating shaft.

[0014] As a preferred embodiment of the installation structure for marine ceiling equipment, one of the two adjacent second connecting rods has a laser emitter on one of their opposite sides, and the other has a positioning element. The second end face of the second rod with the laser emitter is flush with the bottom surface of the laser emitter, and the second end face of the second rod with the positioning element is flush with the bottom surface of the positioning element. When the horizontal light emitted by the laser emitter illuminates the positioning element, the second end faces of the two second rods are at the same height.

[0015] Secondly, a ceiling device is provided, including a device body and an installation structure for the marine ceiling device described above, wherein the device body is suspended below the roof of the ship's cabin via the installation structure.

[0016] The beneficial effects of this invention are as follows: the first connecting part is hinged to all the second connecting parts, and the relative rotation of the first connecting part and the second connecting parts is restricted by locking elements, allowing the first connecting part and the second connecting part to selectively rotate relative to each other. When the first connecting part is welded to an uneven ceiling surface, the rotation restriction between the first connecting part and the second connecting part can be released by the locking elements, allowing the second connecting parts to rotate automatically under gravity, so that the perpendicular bisectors of all the second connecting parts can be perpendicular to the ceiling. Then, the second hanger rod slides relative to the first hanger rod, so that the second ends of the second hanger rods of all connecting parts are at the same height, forming a parallel connecting plane to connect with the equipment body, thereby ensuring that the equipment body can be installed horizontally in one go, so that the installed equipment body can be completely fitted into the ceiling and accurately connected to external pipelines. Therefore, the installation structure of the marine ceiling equipment of this invention can avoid the problem of hot work required due to the misalignment of the equipment body, which helps to improve the manufacturing efficiency of ships and reduce manufacturing costs. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a front view schematic diagram of the installation structure of the marine ceiling equipment described in an embodiment of the present invention.

[0019] Figure 2 This is a side view of the installation structure of the marine ceiling equipment described in an embodiment of the present invention.

[0020] Figure 3 for Figure 2 Enlarged view of point A.

[0021] Figure 4 This is a cross-sectional view of the second connecting portion according to an embodiment of the present invention.

[0022] In the picture:

[0023] 100. Top plate; 200. Ceiling; 300. Equipment body;

[0024] 1. First connecting part; 101. Second sliding groove; 102. Third limiting protrusion;

[0025] 2. Second connecting part; 201. First lifting rod; 2011. First sliding groove; 2012. Second limiting protrusion; 202. Second lifting rod; 2021. First end; 2022. Second end; 2023. Inclined surface; 2024. Plane;

[0026] 3. Fastener; 4. First limiting protrusion; 5. Limiting groove; 6. Hinge; 601. Hinge seat; 602. Connecting rod; 6021. Sliding part; 603. Rotating shaft; 7. First limiting nut; 8. Vibration damping component; 9. Second limiting nut; 10. Laser emitter; 11. Positioning component; 12. Elastic component. Detailed Implementation

[0027] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] In existing ships, ceiling equipment such as fan coil units and air conditioners are suspended on the ceiling of the cabin using slings. Currently, the slings are usually pre-installed and welded to the bottom of the ceiling in the early stages of ship manufacturing. After the ceiling is installed and space is reserved in the ceiling for the installation of the equipment to be suspended, the equipment is then horizontally installed on the slings through the installation space so that the equipment fits into the ceiling.

[0030] However, due to installation or processing errors, the surface of the ceiling may be uneven, causing multiple hangers welded to the bottom of the ceiling to be at different heights. This results in the equipment being installed at an angle and unable to be installed horizontally. Consequently, this can lead to the equipment not being able to connect with external pipelines or the equipment not fitting properly with the ceiling. If the above problems occur, it is necessary to redo cutting and welding to adjust the hangers, which is time-consuming and labor-intensive.

[0031] like Figures 1 to 3 As shown, the present invention provides an installation structure for a marine ceiling device, used to suspend the device body 300 below the roof plate 100 of the ship's cabin. Specifically, the installation structure includes a locking member, a first connecting part 1, and a plurality of second connecting parts 2. Each second connecting part 2 is hinged to the first connecting part 1. Each second connecting part 2 includes a telescopically connected first lifting rod 201 and a second lifting rod 202. One end of the first connecting part 1 is welded to the roof plate 100, and the other end of the first connecting part 1 is hinged to one end of the first lifting rod 201 via a hinge member 6. The locking member is used to restrict the relative rotation of the first connecting part 1 and the first lifting rod 201. The first lifting rod 201 has an internal structure... A first groove 2011 extending along its own length is provided. The first groove 2011 passes through the end face of the first hanger 201 away from the first connecting part 1, and a groove opening of the first groove 2011 is formed on the end face. The second hanger 202 has a first end 2021 and a second end 2022 opposite to each other. The first end 2021 is slidably disposed in the first groove 2011, and the second end 2022 extends through the groove opening of the first groove 2011 to the outside of the first hanger 201. The second end 2022 is used to connect the ceiling equipment.

[0032] Understandably, the first connecting part 1 is hinged to all the second connecting parts 2, and the relative rotation of the first connecting part 1 and the second connecting part 2 is restricted by the locking member, so that the first connecting part 1 and the second connecting part 2 can selectively rotate relative to each other. When the first connecting part 1 is welded to an uneven surface of the ceiling plate 100, the rotation restriction of the first connecting part 1 and the second connecting part 2 can be released by the locking member, so that the second connecting part 2 can rotate automatically under the action of gravity, so that the vertical line of all the second connecting parts 2 can be perpendicular to the ceiling 200. Then, the second hanger 202 is slidably adjusted so that the second hanger 202 slides relative to the first hanger 201, so that the second end 2022 of the second hanger 202 of all the connecting parts is at the same height, so as to form a parallel connecting plane 2024 connected to the equipment body 300, thereby ensuring that the equipment body 300 can be installed horizontally at one time, so that the installed equipment body 300 can be completely fitted into the ceiling 200 and accurately connected to the external pipeline. Therefore, the installation structure of the marine ceiling equipment of the present invention can avoid the problem of hot work required due to the misalignment of the equipment body 300, which helps to improve the manufacturing efficiency of ships and reduce manufacturing costs.

[0033] Specifically, such as Figure 1 As shown, the second rod 202 is wedge-shaped, and the cross-sectional area of ​​the second rod 202 gradually decreases along the direction from the first end 2021 to the second end 2022. The second connecting part 2 also includes a fastener 3. The side wall of the first rod 201 is provided with a connecting hole. The fastener 3 passes through the connecting hole, extends into the first sliding groove 2011, and abuts against the side wall of the second rod 202 to stop the second rod 202. If the fastener 3 is used to abut against the flat side wall of the second hanger 202, the second hanger 202 is stopped only by the friction between the fastener 3 and the second hanger 202. This could easily cause the second hanger 202 to detach from the first hanger 201 due to the weight of the ceiling equipment, resulting in the ceiling equipment falling. This design, however, uses a wedge-shaped second hanger 202. It can stop the second hanger 202 by utilizing the friction between the fastener 3 and the second hanger 202, as well as the abutment between the fastener 3 and the wedge-shaped side wall of the second hanger 202. Moreover, the heavier the equipment body 300, the tighter the abutment between the fastener 3 and the wedge-shaped side wall of the second hanger 202, thereby ensuring that the second hanger 202 will not detach from the first hanger 201 and thus preventing the ceiling equipment from falling.

[0034] Optionally, the fastener 3 is a bolt, which is threaded into the connecting hole to be fixed to the first lifting rod 201 and selectively abuts against the second lifting rod 202; or the fastener 3 is a pin, and the side wall of the second lifting rod 202 is provided with multiple insertion holes at intervals along its own length direction, and the pin passes through the connecting hole and is inserted into the insertion hole.

[0035] Optional, such as Figure 1 As shown, an elastic element 12 is sleeved on the outer side of the fastener 3. The elastic element 12 abuts against the groove wall of the first slide groove 2011 and between the second hanger 202 to further improve the stopping effect of the second hanger 202. For example, the elastic element 12 can be a spring.

[0036] Furthermore, such as Figure 1 As shown, a second limiting protrusion 2012 is provided at the opening of the first slide groove 2011, protruding towards the center of the first slide groove 2011, to prevent the second lifting rod 202 from disengaging from the first slide groove 2011. This design allows the second limiting protrusion 2012 to engage with the wedge-shaped second lifting rod 202, preventing the second lifting rod 202 from disengaging from the first lifting rod 201 due to misoperation when the fastener 3 is not properly engaged. Furthermore, even if the fastener 3 fails to engage, it ensures that the second lifting rod 202 will not disengage from the first lifting rod 201, thus preventing the equipment body 300 from falling.

[0037] Because the fastener 3 is pressed against the side wall of the second guide rod 202, the second guide rod 202 is prone to deflection after sliding adjustment, resulting in the end face of the second end 2022 of the second guide rod 202 not being horizontal, thus causing the equipment body 300 to be installed at an angle. (Refer to...) Figure 1 and Figure 2 In this embodiment, the sidewall of the second rod 202 includes at least one inclined surface 2023 and multiple planes 2024. The fastener 3 abuts against the inclined surface 2023. One of the planes 2024 and the groove wall of the first sliding groove 2011 is provided with a first limiting protrusion 4, and the other of the planes 2024 and the groove wall of the first sliding groove 2011 is provided with a limiting groove 5 that cooperates with the first limiting protrusion 4. For example, the first limiting protrusion 4 is provided on the plane 2024, and the groove wall of the first sliding groove 2011 is provided with a limiting groove 5. The first limiting protrusion 4 is slidably disposed in the limiting groove 5, so that the plane 2024 is always in contact with the groove wall of the first sliding groove 2011, so as to avoid the second rod 202 from deflecting after sliding adjustment, so that the center line of the length direction of the second rod 202 is always parallel to the center line of the length direction of the first rod 201, thereby ensuring that the end face of the second end 2022 of the second rod 202 is always horizontal.

[0038] like Figures 1 to 3 As shown, in an optional embodiment, the hinge 6 includes a hinge seat 601 and a connecting rod 602. The hinge 6 is slidably connected to the first connecting part 1. The hinge seat 601 is provided with a second sliding groove 101 extending horizontally from the first connecting part 1 of the first hanging rod 201. One end of the connecting rod 602 is provided with a sliding part 6021, which is slidably disposed in the second sliding groove 101. The other end of the connecting rod 602 is hinged to the hinge seat 601. Through the sliding engagement of the second sliding groove 101 and the sliding part 6021 of the connecting rod 602, the hinge 6 can be slidably connected to the first connecting part 1, so as to adjust the position of the second connecting part 2 horizontally to adapt to equipment bodies 300 of different sizes. Therefore, the installation structure of the marine ceiling equipment has good compatibility.

[0039] Specifically, such as Figure 2 As shown, a third limiting protrusion 102 is provided on the groove wall of the second slide groove 101 near the groove opening, protruding towards the center. A portion of the sliding part 6021 abuts against the third limiting protrusion 102 to support the sliding part 6021 and prevent it from disengaging from the second slide groove 101. A first limiting nut 7 is threadedly connected to the middle of the hinge member 6, and the first limiting nut 7 is located outside the second slide groove 101. The first limiting nut 7 can be screwed to abut against the side of the third limiting protrusion 102 away from the sliding part 6021 to restrict the sliding of the connecting rod 602. When it is necessary to slide and adjust the second connecting part 2, the side of the first limiting nut 7 away from the third limiting protrusion 102 away from the sliding part 6021 can be screwed to unlock the connecting rod 602, allowing it to slide and move the second connecting part 2.

[0040] Because the ceiling-mounted equipment vibrates and generates noise during use, this noise is transmitted to the ceiling 100 through the installation structure, causing noise diffusion and easily affecting the comfort and experience of the people on board. Preferably, such as Figure 2 As shown, an elastic damping element 8 is provided between the groove wall of the second chute 101 and the sliding part 6021. For example, the damping element 8 can be a rubber pad, which can be used to buffer vibration by means of elasticity, thereby isolating the transmission of noise and preventing noise from affecting the people on board.

[0041] Optional, such as Figure 3 As shown, the locking element is a second limiting nut 9. A rotating shaft 603 is rotatably mounted on the hinge seat 601. The connecting rod 602 is connected to the rotating shaft 603 so that the connecting rod 602 can rotate relative to the hinge seat 601. The two ends of the rotating shaft 603 are located outside the hinge seat 601 and are respectively screwed with second limiting nuts 9. The second limiting nuts 9 can be screwed and pressed against the side wall of the hinge seat 601 to restrict the rotation of the connecting rod 602 relative to the hinge seat 601, thereby restricting the relative rotation of the first connecting part 1 and the second connecting part 2.

[0042] In an alternative embodiment, refer to Figure 1 In each of the two adjacent second connecting parts 2, one of the second rods 202 has a laser emitter 10 on its opposite side, and the other has a positioning element 11, which can be a receiver. The second end 2022 of the second rod 202 with the laser emitter 10 is flush with the bottom surface of the laser emitter 10, and the second end 2022 of the second rod 202 with the positioning element 11 is flush with the bottom surface of the positioning element 11. When the horizontal light emitted by the laser emitter 10 illuminates the positioning element 11, the second end 2022 of the two second rods 202 are at the same height. By setting the laser emitter 10 and the positioning element 11, it is possible to use light to determine whether the second end 2022 of all the second rods 202 of the second connecting parts 2 are at the same height, and the light can be used as a reference to quickly and accurately adjust the second rods 202 so that the second end 2022 of all the second rods 202 of the second connecting parts 2 are at the same height.

[0043] like Figure 1 As shown, the present invention also provides a ceiling-mounted device, including a device body 300 and an installation structure for the marine ceiling-mounted device described in any of the above embodiments. The device body 300 is suspended below the ship's cabin roof 100 via the installation structure. By installing the device body 300 onto the installation structure described in the present invention, it is possible to ensure that the device body 300 is installed horizontally in one go, thereby avoiding hot work operations due to misalignment of the device body 300, which helps to improve the overall shipbuilding efficiency and reduce the overall shipbuilding cost.

[0044] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings, and are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0045] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0047] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of the invention without inventive effort, and these embodiments will all fall within the scope of protection of the present invention.

Claims

1. An installation structure for a marine ceiling system, used to hoist the equipment body of the ceiling system below the roof of the ship's cabin, characterized in that, The device includes a locking element, a first connecting part, and multiple second connecting parts. Each second connecting part includes a first hanger and a second hanger. One end of the first connecting part is welded to the top plate, and the other end of the first connecting part is hinged to the first hanger via a hinge. The locking element is used to restrict the relative rotation of the first connecting part and the first hanger. The first hanger has a first groove inside. The second hanger has a first end and a second end opposite to each other. The first end is slidably disposed in the first groove, and the second end extends through the opening of the first groove to the outside of the first hanger. The second end is used to connect to the ceiling equipment.

2. The installation structure of the marine ceiling equipment according to claim 1, characterized in that, The second rod is wedge-shaped, and its cross-sectional area gradually decreases along the direction from the first end to the second end. The second connecting part also includes a fastener. The side wall of the first rod is provided with a connecting hole, and the fastener passes through the connecting hole, extends into the first groove, and abuts against the side wall of the second rod.

3. The installation structure of the marine ceiling equipment according to claim 2, characterized in that, The side wall of the second rod includes at least one inclined surface and multiple planes. The fastener abuts against the inclined surface. One of the planes and the groove wall of the first slide groove is provided with a first limiting protrusion. The other of the planes and the groove wall of the first slide groove is provided with a limiting groove that cooperates with the first limiting protrusion. The first limiting protrusion is slidably disposed in the limiting groove.

4. The installation structure of the marine ceiling equipment according to claim 1, characterized in that, The opening of the first slide groove has a second limiting protrusion protruding towards the center of the first slide groove to prevent the second lifting rod from disengaging from the first slide groove.

5. The installation structure for marine ceiling equipment according to any one of claims 1 to 4, characterized in that, The hinge includes a hinge seat and a connecting rod. The hinge seat is provided with a second sliding groove that extends horizontally to the first connecting part of the first rod. One end of the connecting rod is provided with a sliding part that is slidably disposed in the second sliding groove. The other end of the connecting rod is hinged to the hinge seat.

6. The installation structure of the marine ceiling equipment according to claim 5, characterized in that, The second slide groove has a third limiting protrusion protruding from the groove opening towards the center. Part of the sliding part abuts against the third limiting protrusion. The middle part of the hinge is threaded with a first limiting nut. The first limiting nut is located outside the second slide groove and can be screwed to abut against the side of the third limiting protrusion away from the sliding part.

7. The installation structure of the marine ceiling equipment according to claim 6, characterized in that, An elastic damping element is provided between the groove wall of the second chute and the sliding part.

8. The installation structure of the marine ceiling equipment according to claim 5, characterized in that, The locking element is a second limiting nut. A rotating shaft is rotatably mounted on the hinge seat. The rotating shaft is connected to the connecting rod. Both ends of the rotating shaft are located outside the hinge seat and are respectively screwed with the second limiting nut. The second limiting nut can be screwed and pressed against the side wall of the hinge seat to restrict the rotation of the rotating shaft.

9. The installation structure for marine ceiling equipment according to any one of claims 1 to 4, characterized in that, On the opposite sides of the two second rods of the two adjacent second connecting parts, one is provided with a laser emitter and the other with a positioning element. The second end face of the second rod with the laser emitter is flush with the bottom surface of the laser emitter, and the second end face of the second rod with the positioning element is flush with the bottom surface of the positioning element. When the horizontal light emitted by the laser emitter shines on the positioning element, the second end faces of the two second rods are at the same height.

10. A ceiling-mounted device, characterized in that, The device includes a main body and an installation structure for the marine ceiling equipment as described in any one of claims 1 to 9, wherein the main body is suspended below the roof of the ship's cabin via the installation structure.

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