Sanitary unit access door

Abstract

This utility model discloses a sanitary unit access door, relating to the field of ship cabin facilities technology. It includes an integrally molded door frame body and a door frame skeleton. The door frame skeleton has a slot for accommodating a fixed hinge component. The fixed hinge component is connected to a movable hinge component via a hinge shaft, together forming a hinge assembly. This hinge assembly is located inside the door frame, making it invisible from the outside of the sanitary unit, achieving concealed installation. A first blocking surface is provided on the inner side of the door frame skeleton, and a second blocking surface is provided on the access door body. When closed, the two interlock, ensuring that the outer surface of the door leaf is flush with the outer surface of the door frame. This utility model, through its integrally molded frame and internal hinge design, solves the problems of large installation gaps, low structural strength, and exposed hinges affecting aesthetics in traditional access doors. It has the advantages of stable structure, neat appearance, and good sealing performance, making it particularly suitable for ship sanitary units.

Description

Technical Field

[0001] This utility model relates to the field of ship cabin facilities technology, specifically to a sanitary unit access door. Background Technology

[0002] In modern shipbuilding, to improve construction efficiency and ensure the uniformity of construction quality and internal environment, sanitary units (such as toilets and bathrooms) generally adopt modular design and prefabrication. These spaces contain complex piping systems, ventilation facilities, and electrical wiring, requiring regular inspection and maintenance. Due to the special nature of ships, the interior space is small, and the valve and piping systems of sanitary compartments are installed inside the exterior bulkheads, making maintenance and disassembly inconvenient. To facilitate maintenance, maintenance areas are usually set up on the non-use side of the sanitary unit or on adjacent bulkheads (such as the triangular maintenance area in the toilet unit of the compartment unit in patent CN203473214U), and maintenance doors are installed. Because the internal space of ships is limited, the space of the maintenance area of ​​sanitary units is even more limited. In addition, the ship's interior is humid, so the maintenance doors not only need to meet the basic opening and closing functions, but also need to meet high requirements in terms of sealing, aesthetics, durability, and adaptability.

[0003] Most traditional access doors use ordinary hinges, resulting in the hinges being exposed to the outside of the sanitary unit for extended periods, affecting the cleanliness and aesthetics of the cabin interior. Furthermore, traditional access doors are often installed after the sanitary unit walls have been assembled, with the door opening either created later or the door frame simply embedded in a pre-designed opening. This results in gaps between the door frame and the wall, and requires numerous screws for reinforcement, which is not only weak but also unsightly. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects existing in the prior art and provide a sanitary unit maintenance door.

[0005] To achieve the above objectives, the technical solution of this utility model is to design a sanitary unit maintenance door, including a door frame body, a door opening for accommodating the maintenance door body, a door frame skeleton around the door opening, and at least one slot for accommodating a fixed hinge member on one side of the door frame skeleton. The fixed hinge member is hinged to a movable hinge member, and the movable hinge member is connected to the maintenance door body. The fixed hinge component includes a base plate, with first bent plates at both the upper and lower ends of the base plate. A first mounting plate is provided at one end of each of the two first bent plates. The first mounting plate is provided with a first screw hole for fixing to the door frame frame. A second bent plate is provided on one side of the base plate. Hinge holes are provided at opposite positions on the two first bent plates. A hinge shaft is fitted inside the hinge hole. The movable hinge includes a second mounting plate installed on one side of the inspection door body. The second mounting plate is provided with a second screw hole for fixing to the inspection door body. A third bending plate is provided on one side of the second mounting plate, and a hinge plate is provided on one side of the third bending plate. A second hinge sleeve is provided at one end of the hinge plate, and the second hinge sleeve is fitted onto the hinge shaft.

[0006] The door frame skeleton has a first blocking surface recessed inwards on all four sides of one inner side, and a second blocking surface extending outwards on one side of the access door body. The first and second blocking surfaces fit together when the access door body is closed. The recessed design of the first blocking surface forms a stepped structure, while the second blocking surface acts as a mating flange. When the door is closed, the two blocking surfaces interlock. This design firstly provides a preliminary physical barrier, effectively increasing the path resistance for air and sound transmission. Secondly, and more importantly, this stepped interlocking structure precisely restricts the closing position of the access door body, ensuring that its outer surface remains flush with the outer surface of the door frame body when closed. This greatly enhances the overall aesthetics, allowing the door to smoothly transition into the surrounding wall panels, creating a seamless visual effect. On the other hand, it effectively prevents the main body of the access door from protruding outward from the door frame, avoiding additional occupation and collision risks in narrow spaces. At the same time, it reliably prevents the main body of the access door from opening and closing inward beyond the set position, ensuring the stability of the design and the effective pressing of the sealing surface.

[0007] A buffer sealing gasket is provided on the first and / or second blocking surfaces. The buffer sealing gasket is usually made of flame-retardant rubber strip. When the access door is closed, the door leaf compresses the buffer sealing gasket through the second blocking surface, causing the gasket to elastically deform and fill the tiny gaps that may exist between the door leaf and the door frame due to processing or installation, thereby forming a reliable airtight and watertight barrier.

[0008] The main body of the door frame has a first interface and a second interface on its left and right sides, respectively, for connecting to the side wall panels. The first and second interfaces are used to connect the main body of the door frame to the side wall panels. Their standardized design ensures that the access door can be quickly and accurately connected during the assembly of the sanitary unit, forming a coherent whole with the surrounding environment.

[0009] The inspection door body is provided with a door lock mechanism on the side away from the movable hinge, and the door frame frame is provided with a lock hole at the position corresponding to the door lock mechanism.

[0010] An embedded handle is provided on the surface of the main body of the inspection door. The embedded handle is used to open or move the main body of the inspection door.

[0011] The door frame body includes a back panel and a front panel, with a rock wool layer sandwiched between them. The door frame body employs a composite sandwich structure; the back panel and front panel are typically made of galvanized steel sheets, bonded to the intermediate rock wool layer using folded edges or adhesives to form a single unit. As the core functional material, the rock wool layer not only provides excellent thermal insulation performance, reducing heat exchange between the inside and outside of the sanitary unit, but also effectively absorbs and blocks sound transmission, improving sound insulation. Furthermore, this sandwich structure endows the door frame body with high structural strength and dimensional stability, making it less prone to deformation due to temperature and humidity changes, while also possessing a certain degree of fire resistance.

[0012] The advantages and beneficial effects of this utility model are as follows: 1. By using specially designed fixed and movable hinges, during the opening and closing process, it can be ensured that the outer surface of the maintenance door body is strictly flush with the outer surface of the door frame body when closed, and the entire hinge assembly can be hidden inside the maintenance area. The hinge assembly is not visible from the outside of the maintenance area, thus preventing the door leaf from protruding and occupying extra space, and also avoiding the long-term exposure of the hinge assembly to the outside of the sanitary unit, effectively preventing personnel from bumping into each other and passageway obstruction.

[0013] 2. The door frame body and the door frame skeleton are integrated into one structure. During factory processing, the door frame skeleton and the door frame body are processed together according to the design dimensions, which gives it strong structural strength and avoids the need for reinforcement with screws or other fasteners later. It also enhances the overall aesthetics. In addition, the design of the first and second interfaces on both sides of the door frame body allows it to be well integrated into the modular prefabricated sanitary unit system, which facilitates the overall installation of the sanitary unit. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the inspection door of this utility model when it is closed; Figure 2 This is a schematic diagram of the structure of the inspection door of this utility model when it is opened; Figure 3 This is a structural schematic diagram of the main body of the door frame of this utility model; Figure 4 This is a schematic diagram of the structure of the hinge assembly of this utility model; Figure 5 This is a top view of the main body of the door frame of this utility model.

[0015] In the diagram: 1. Door frame body; 11. Door opening; 12. Back panel; 13. Front panel; 14. First interface; 15. Second interface; 2. Inspection door body; 21. Second blocking surface; 3. Door frame skeleton; 31. Groove; 32. First blocking surface; 4. Fixed hinge; 41. Base plate; 42. First bending plate; 43. First mounting plate; 44. First screw hole; 45. Second bending plate; 46. Hinge hole; 5. Movable hinge; 51. Second mounting plate; 52. Second screw hole; 53. Third bending plate; 54. Hinge plate; 55. Second hinge sleeve; 6. Hinge shaft; 7. Rock wool board layer; 8. Door lock mechanism; 9. Embedded handle; 10. Enclosure panel. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0017] according to Figures 1-3 As shown, this utility model is a sanitary unit maintenance door, including a door frame body 1. The door frame body 1 is typically made of galvanized steel sheet and has an overall rectangular frame structure. The door frame body 1 is connected to the ship's bulkhead panels 10 on both sides through a first interface 14 and a second interface 15 provided on its left and right sides (e.g., Figure 5 (As shown). A rectangular doorway 11 is precisely cut into the center of the door frame body 1. The size of the doorway 11 is determined according to maintenance requirements. The door frame frame 3 is fixedly installed around the doorway 11 by welding or high-strength structural adhesive. The door frame frame 3 is formed by multiple bending of high-quality cold-rolled steel plate. It not only enhances the structural strength of the edges of the doorway 11, but also provides an installation base for the subsequent hinge and sealing system. The door frame body 1 and the door frame frame 3 are an integral structure. The entire door frame frame 3 is directly welded to the back plate 12 and front panel 13 of the door frame body 1 during factory processing. The specific operation is as follows: First, notches slightly smaller than the designed door opening 11 are made on two steel plates. Then, the notches are bent around their edges to create a door opening 11 of the same size as the designed opening 11, serving as the back plate 12 and front plate 13 of the main body 1 of the door frame. Next, the door frame skeleton 3 is bent multiple times according to the design dimensions and welded to the back plate 12. Then, pre-cut rock wool boards are laid on the back plate 12. Finally, the front plate 13 is snapped together and welded to form a single unit. The above is a simplified description of the processing flow for ease of understanding; the actual operation is more detailed and complex, requiring the sealing of the rock wool boards, the creation of the slots 31 for installing and fixing the hinge components 4, and the creation of lock holes (not shown in the figure).

[0018] On one side of the door frame skeleton 3, two rectangular slots 31 are symmetrically opened vertically. According to Figure 4As shown, each slot 31 accommodates a fixed hinge 4. The fixed hinge 4 is integrally formed from a steel plate through stamping and bending processes. It includes a base plate 41 as the main load-bearing component. The upper and lower ends of the base plate 41 (the two ends along the hinge axis) are bent vertically to one side to form two first bending plates 42. The end of each first bending plate 42 is then bent horizontally outward at a 90-degree angle to form a first mounting plate 43. Two first screw holes 44 are provided on each of the two first mounting plates 43. Screws are passed through the inside of the door frame frame 3 to securely lock the entire fixed hinge 4 into the slot 31, ensuring that the screw heads do not protrude from the inner surface of the door frame frame 3. On the side of the base plate 41 near the door opening 11, a second bending plate 45 is also bent vertically (facing the same direction as the first bending plate 42, but with a perpendicular surface). This bending plate further enhances the ability of the base plate 41 to resist bending deformation caused by the pressure of the door leaf. At the relative positions of the two first bending plates 42, coaxial hinge holes 46 are precision machined. Composite oil-free bushings are press-fitted into the holes. A hinge shaft 6, with a length that passes through both upper and lower fixed hinge members 4, passes through the bushing.

[0019] according to Figure 4 As shown, the movable hinge 5 is also made of steel plate. It includes a second mounting plate 51 connected to the inside of the access door body 2 by multiple countersunk screws, with the screws screwed into the second screw holes 52 on the second mounting plate 51. On one side of the second mounting plate 51, a third bent plate 53 is formed by bending at a 90-degree angle. The end of the third bent plate 53 is connected to a hinge plate 54, and the end of the hinge plate 54 is machined with a second hinge sleeve 55, which also has the same oil-free bushing pressed inside. During installation, the second hinge sleeve 55 of the movable hinge 5 is aligned with the hinge hole 46 of the fixed hinge 4, and the hinge shaft 6 is inserted to complete the hinge. The two ends of the hinge shaft 6 are axially fixed with nylon lock nuts and coated with thread-locking adhesive. During assembly, an appropriate amount of grease should be applied to the bushing and the mating surface between the hinge shaft and the bushing to ensure smooth rotation and reduce wear.

[0020] It should be noted that the base plate 41 of the fixed hinge 4, the two first bending plates 42, and the second bending plate 45 form a groove, and the second mounting plate 51, the third bending plate 53, and the hinge plate 54 of the movable hinge 5 form a U-shaped groove. The outer surface of the U-shaped groove is located in the groove formed by the fixed hinge 4, and the movable hinge 5 rotates within this groove when it rotates. Only part of the second mounting plate 51 is exposed at the connection point with the inspection door body 2.

[0021] according to Figure 2As shown, to achieve a flush design between the door leaf and the door frame, a first inwardly recessed blocking surface 32 is formed around the inner perimeter of the door frame skeleton 3 facing the door opening 11 by bending. Correspondingly, a matching second blocking surface 21 is formed by bending outwards around the perimeter of the access door body 2. When the access door body 2 is closed, the second blocking surface 21 is precisely embedded in the recessed area of ​​the first blocking surface 32. This fitting structure serves the following functions: First, it precisely limits the final closed position of the access door body 2, ensuring that its outer surface is strictly flush with the outer surface of the door frame body 1, preventing the door leaf from protruding or recessing. Second, it forms the first sealing barrier, effectively increasing the path resistance for air and sound wave leakage. Finally, because the second blocking surface 21 is held in place by the first blocking surface 32, it reliably prevents the door leaf from opening into the sanitary unit, ensuring the one-way opening characteristic of the design.

[0022] A rectangular sealing strip groove (not shown in the figure) is formed on the first blocking surface 32. A hollow circular buffer sealing gasket (not shown in the figure) is embedded in the groove. This sealing gasket is made of flame-retardant rubber strip and has excellent aging resistance and flame retardant properties. When the door is closed, the second blocking surface 21 compresses the buffer sealing gasket with a certain amount of compression, causing it to deform, thereby forming a reliable and elastic airtight and watertight barrier.

[0023] On the right side of the access door body 2 (away from the hinge), a door lock mechanism 8 is internally installed. The lock body is secured by mounting screws on the side. A keyhole is precisely machined at the corresponding position on the door frame 3, and a wear-resistant brass sleeve is inlaid within the keyhole. When a key is inserted and turned, the bolt pops out and inserts into the keyhole, locking the door.

[0024] An embedded handle 9 is installed on the outer surface of the access door body 2. The embedded handle 9 is preferably an inwardly recessed groove, the size of which is convenient for a finger to pass through, so that the front appearance is simple and without any protrusions.

[0025] The main body 1 of the door frame adopts a composite structure. Both its back panel 12 and front panel 13 are galvanized steel sheets with a thickness of 0.5mm. Between the back panel 12 and front panel 13, a material with a density of 120kg / m³ is filled. 3 The rock wool board layer 7 (compliant with GB / T 11835 standard) is bonded together with two-component polyurethane structural adhesive, and the edges are sealed and locked around the door frame using a mechanical edge-rolling process, forming a composite structure with high strength, excellent sound insulation, heat insulation, and flame retardant properties.

[0026] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A sanitary unit access door, characterized in that, Includes a door frame body (1), the door frame body (1) has a door opening (11) for accommodating the maintenance door body (2), the door opening (11) is surrounded by a door frame frame (3), the door frame frame (3) has at least one slot (31) on one side for accommodating a fixed hinge (4), the fixed hinge (4) is hinged to a movable hinge (5), the movable hinge (5) is connected to the maintenance door body (2); The fixed hinge component (4) includes a base plate (41), and the base plate (41) is provided with a first bending plate (42) at both the upper and lower ends. A first mounting plate (43) is provided at one end of each of the two first bending plates (42). The first mounting plate (43) is provided with a first screw hole (44) for fixing to the door frame frame (3). A second bending plate (45) is provided on one side of the base plate (41). Hinge holes (46) are provided at opposite positions on the two first bending plates (42). A hinge shaft (6) is fitted inside the hinge hole (46). The movable hinge (5) includes a second mounting plate (51) installed on one side of the inspection door body (2). The second mounting plate (51) is provided with a second screw hole (52) for fixing to the inspection door body (2). A third bending plate (53) is provided on one side of the second mounting plate (51). A hinge plate (54) is provided on one side of the third bending plate (53). A second hinge sleeve (55) is provided at one end of the hinge plate (54). The second hinge sleeve (55) is fitted onto the hinge shaft (6).

2. A sanitary unit access door according to claim 1, characterized in that, The door frame skeleton (3) has a first blocking surface (32) recessed inward around one side, and the maintenance door body (2) has a second blocking surface (21) extending outward on one side. The first blocking surface (32) and the second blocking surface (21) fit together when the maintenance door body (2) is closed.

3. A sanitary unit access door according to claim 2, characterized in that, A buffer sealing gasket is provided on the first blocking surface (32) and / or the second blocking surface (21).

4. A sanitary unit access door according to claim 1, characterized in that, The main body of the door frame (1) has a first interface (14) and a second interface (15) on the left and right sides respectively, which are connected to the side wall panels (10).

5. A sanitary unit access door according to claim 1, characterized in that, The inspection door body (2) is provided with a door lock mechanism (8) on the side away from the movable hinge (5), and the door frame skeleton (3) is provided with a lock hole at the position corresponding to the door lock mechanism (8).

6. A sanitary unit access door according to claim 1, characterized in that, An embedded handle (9) is provided on the surface of the main body (2) of the inspection door.

7. A sanitary unit access door according to claim 1, characterized in that, The door frame body (1) includes a back panel (12) and a front panel (13), and a rock wool board layer (7) is provided between the back panel (12) and the front panel (13).

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