Sidelight Installation Device and Installation Method

Abstract

This invention belongs to the field of marine technology and discloses a sidelight mounting device and method. The sidelight mounting device includes a light box and a light holder. The light box is mounted on the bulwark of the ship and has a receiving cavity. A first opening communicating with the receiving cavity is provided on the side of the light box facing the ship's centerline. The light holder is removably mounted in the receiving cavity and includes a first mounting plate and a second mounting plate connected together. The first mounting plate is configured to connect with the sidelight. By pulling the light holder, the sidelight can be moved in or out of the receiving cavity through the first opening, and the second mounting plate can be used to block or open the first opening. The light from the sidelight can be emitted to the outside at a predetermined angle through the light box. The sidelight mounting method utilizes the aforementioned sidelight mounting device. This sidelight mounting device and method facilitate the maintenance and upkeep of the sidelight, are easy to operate, highly efficient, and ensure the safety of operators.

Description

Technical Field

[0001] This invention relates to the field of marine technology, and in particular to a sidelight mounting device and mounting method. Background Technology

[0002] Port lights are installed on the port and starboard sides of ships to indicate the ship's position and direction of travel during nighttime navigation. Port lights are typically mounted on the bulwark via light boxes. Due to the limitations of their installation location, maintenance and upkeep of port lights present significant challenges. Specifically, when maintaining port lights on open hull structures, operators must stand on the edge of the ship, increasing the risk of falls. Conversely, maintaining port lights on enclosed hull structures requires erecting supports on the outside of the hull, which is time-consuming, labor-intensive, and costly. Summary of the Invention

[0003] The purpose of this invention is to provide a port light mounting device and installation method that facilitates the maintenance and upkeep of port lights, is easy to operate, highly efficient, and ensures the safety of operators.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] On the one hand, a portlight mounting device is provided, comprising:

[0006] A light box, installed on the bulwark of a ship, has a receiving cavity inside, and a first opening communicating with the receiving cavity is provided on the side of the light box facing the centerline of the ship;

[0007] The lamp holder is retractably disposed in the receiving cavity and includes a first mounting plate and a second mounting plate connected together. The first mounting plate is configured to be connected to the port light. By pulling the lamp holder, the port light can be moved into or out of the receiving cavity through the first opening, and the second mounting plate can be used to block or open the first opening. The light of the port light can be emitted to the outside through the lamp box at a predetermined angle.

[0008] Preferably, a limiting plate is provided inside the receiving cavity, and a limiting rod is provided at one end of the first mounting plate that extends into the receiving cavity. The limiting rod can be inserted into the limiting hole provided in the limiting plate to limit the lamp holder within the receiving cavity.

[0009] Preferably, the first mounting plate is provided with a guide structure, and two guide plates are provided opposite to each other on the bottom plate of the light box. The guide plates extend along the pulling direction of the lamp holder, and the two guide plates together form a guide groove. The two ends of the limiting plate are respectively connected to the two guide plates, and the guide structure can be inserted into the guide groove and slide in cooperation with the guide groove.

[0010] Preferably, the guide plate is disposed on the side of the base plate facing away from the portlight, and the base plate is provided with a through groove communicating with the guide groove. The width of the through groove is greater than the width of the guide groove. The first mounting plate can be inserted into the through groove and slide in cooperation with the through groove, and the top surface of the first mounting plate is flush with the top surface of the base plate.

[0011] Preferably, a first elastic element is provided in the limiting hole, and the limiting rod can elastically contact the first elastic element during the process of the limiting rod being inserted into the limiting hole.

[0012] Preferably, the cross-sectional area of ​​the limiting rod gradually decreases from the end connected to the first mounting plate to the other end.

[0013] Preferably, a locking element is also included, which can lock the second mounting plate to the light box.

[0014] Preferably, a second elastic element is provided between the light box and the second mounting plate, and the second mounting plate is in elastic contact with the light box through the second elastic element.

[0015] Preferably, the device also includes fasteners. The first mounting plate is provided with a connector that can pass through the connecting plate of the portlight. The fasteners are sleeved on the connectors and located on the side of the connecting plate facing away from the first mounting plate. The fasteners can press the connecting plate tightly against the first mounting plate.

[0016] On the other hand, a method for installing sidelights is provided, which uses the above-mentioned sidelight installation device and includes the following steps:

[0017] A second opening is made on the bulwark opposite to the light box, and the light box is embedded and installed in the second opening;

[0018] Connect the sidelight to the first mounting plate;

[0019] The first mounting plate is moved into the receiving cavity, and the second mounting plate is used to seal the first opening.

[0020] The beneficial effects of this invention are:

[0021] The portlight mounting device and method provided by this invention, in specific use, firstly, second openings opposite the light box are made on the port and starboard sides of the ship, and the light box is embedded in the second openings. Then, the portlight is connected to the first mounting plate, and the lamp holder is placed in the receiving cavity. The second mounting plate then seals the first opening to complete the installation. When maintaining the portlight, the operator only needs to stand on the deck to pull the lamp holder out of the receiving cavity, which is very convenient. The light emitted by the portlight is dispersed to the outside at a specific angle through the light box to indicate the ship's position and direction of travel. The first mounting plate ensures the stability of the connection between the portlight and the lamp holder. By pulling out the lamp holder, the portlight can be moved out of the receiving cavity through the first opening and placed on the deck, allowing maintenance of the portlight on the deck without the need for a support frame or standing on the edge of the ship, ensuring the safety of the operator and improving maintenance efficiency. The second mounting plate seals the first opening, preventing seawater or rainwater from entering the ship's interior through the first opening, and also preventing interference from deck lights. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the installation position of the sidelight mounting device provided by the present invention on a ship;

[0023] Figure 2 yes Figure 1 Sectional view at point AA;

[0024] Figure 3 yes Figure 1 A partial view;

[0025] Figure 4 yes Figure 1 A partial view of the side view;

[0026] Figure 5 This is an exploded view of the lamp box and lamp holder of the portlight mounting device provided by the present invention;

[0027] Figure 6 This is a front view of the lamp holder of the portlight mounting device provided by the present invention;

[0028] Figure 7 This is an attached view of the lamp holder of the portlight mounting device provided by the present invention;

[0029] Figure 8 This is a side view of the lamp holder of the portlight mounting device provided by the present invention;

[0030] Figure 9 This is a top view of the light box of the portlight mounting device provided by the present invention;

[0031] Figure 10 This is a schematic diagram of the base plate of the portlight mounting device provided by the present invention.

[0032] In the picture:

[0033] 1. Light box; 11. Base plate; 111. Guide plate; 112. Through groove; 12. Inner side plate; 121. First opening; 13. Limiting plate; 131. Limiting hole; 1311. First elastic element; 14. Top plate; 15. Outer side plate; 16. Front side plate; 17. Rear side plate; 18. Third opening; 2. Lamp holder; 21. First mounting plate; 211. Limiting rod; 212. Connector; 213. First fixing plate; 214. Second fixing plate; 22. Second mounting plate; 221. Handle; 3. Locking element; 4. Second elastic element; 5. Fastener; 6. Spring washer; 100. Ship; 101. Bulkhead; 200. Sidelight; 201. Connecting plate. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0035] 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.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0038] See Figures 1 to 10 This embodiment provides a sidelight mounting device that facilitates the maintenance and upkeep of the sidelight 200, is easy to operate, highly efficient, and ensures the safety of operators. The sidelight mounting device includes a light box 1 and a lamp holder 2. The light box 1 is mounted on the bulwark 101 of the ship 100. The light box 1 has a receiving cavity, and the side of the light box 1 facing the centerline of the ship has a first opening 121 communicating with the receiving cavity. The lamp holder 2 is removably mounted in the receiving cavity and includes a first mounting plate 21 and a second mounting plate 22 connected together. The first mounting plate 21 is configured to connect with the sidelight 200. By pulling the lamp holder 2, the sidelight 200 can be moved into or out of the receiving cavity through the first opening 121, and the second mounting plate 22 can block or open the first opening 121. The light from the sidelight 200 can be emitted to the outside at a predetermined angle through the light box 1.

[0039] It should be noted that, Figure 1 The X-axis points to the ship's centerline, and the arrow points towards the bow. The port and starboard bulwarks 101 on either side of the bow are the port bulwark and starboard bulwark, respectively. The port light 200 mounted on the port bulwark is the port light, and the port light 200 mounted on the starboard bulwark is the starboard light. The port and starboard lights are symmetrically arranged along the ship's centerline. Based on this, the light box 1 mounted on the port bulwark is the port light box, and the light box 1 mounted on the starboard bulwark is the starboard light box. After installation, the port and starboard light boxes are mirror images of each other. This embodiment uses the installation of the port light as an example to describe the port light installation device in detail.

[0040] See Figures 1 to 4 In practical use, firstly, second openings opposite to the light box 1 are made on the port and starboard sides 101 of the vessel 100, and the light box 1 is embedded in the second openings. Then, the sidelight 200 is connected to the first mounting plate 21, and the lamp holder 2 is placed in the receiving cavity, so that the second mounting plate 22 seals the first opening 121 to complete the installation. (See reference...) Figure 5When maintaining the portlight 200, the operator only needs to stand on the deck to pull the lamp holder 2 out of the receiving cavity, which is very convenient. The light emitted by the portlight 200 is dispersed to the outside through the lamp box 1 at a specific angle to indicate the position and direction of travel of the ship 100. The first mounting plate 21 ensures the stability of the connection between the portlight 200 and the lamp holder 2. By pulling out the lamp holder 2, the portlight 200 can be moved out of the receiving cavity through the first opening 121 and placed on the deck. Thus, the portlight 200 can be maintained on the deck without the need for a support frame or standing on the edge of the ship 100, ensuring the safety of the operator and improving maintenance efficiency. The second mounting plate 22 can seal the first opening 121, thereby preventing seawater or rainwater from entering the ship 100 through the first opening 121, and also preventing the lights on the deck from interfering with the light of the portlight 200. In this embodiment, the first mounting plate 21 and the second mounting plate 22 are vertically connected.

[0041] Optionally, see Figure 2 A limiting plate 13 is provided inside the receiving cavity, and a limiting rod 211 is provided at one end of the first mounting plate 21 that extends into the receiving cavity. The limiting rod 211 can be inserted into the limiting hole 131 provided on the limiting plate 13 to limit the lamp holder 2 within the receiving cavity. When the limiting rod 211 is inserted into the limiting hole 131 on the limiting plate 13, the lamp holder 2 is fixedly positioned within the receiving cavity, preventing the lamp holder 2 from falling out of the receiving cavity unintentionally and ensuring the stability of the lamp holder 2 and the lamp box 1.

[0042] Preferably, see Figure 2 and Figure 5 A first elastic element 1311 is provided inside the limiting hole 131. During the insertion of the limiting rod 211 into the limiting hole 131, the limiting rod 211 can elastically contact the first elastic element 1311. During the insertion of the limiting rod 211 into the limiting hole 131, it can compress the first elastic element 1311 and deform it. Under its own restoring force, the first elastic element 1311 can tightly wrap around the limiting rod 211, thereby increasing the friction with the limiting rod 211 and further improving the stability of the limiting rod 211 and the limiting plate 13, preventing the lamp holder 2 from shaking. In addition, the first elastic element 1311 can also provide a buffer for the insertion of the limiting rod 211, ensuring the stability when pulling the lamp holder 2. Furthermore, a groove is provided circumferentially on the side wall of the first elastic element 1311. The first elastic element 1311 is inserted into the limiting hole 131 through the groove to prevent the first elastic element 1311 from dislodging from the limiting hole 131. Optionally, the first elastic element 1311 is made of rubber material, which has high elasticity and is easily deformable.

[0043] More specifically, the cross-sectional area of ​​the limiting rod 211 gradually decreases from the end connected to the lamp holder 2 to the other end. That is, the limiting rod 211 is set in a conical shape to facilitate insertion into the limiting hole 131. At the same time, this setting can also increase the stability of the limiting rod 211 and the first elastic member 1311 in limiting, and ensure the stability of the limiting connection between the limiting rod 211 and the limiting plate 13.

[0044] Preferably, the device also includes a locking member 3, which locks the second mounting plate 22 to the light box 1. After the limiting rod 211 is inserted into the limiting hole 131, the locking member 3 is used to lock the second mounting plate 22 to the light box 1 to prevent the lamp holder 2 from detaching from the light box 1. When maintaining the porthole light 200, the locking member 3 can be removed first, and the lamp holder 2 can be pulled out of the receiving cavity, which is very convenient.

[0045] Specifically, see Figure 2 , Figure 4 , Figure 9 and Figure 10 The light box 1 includes a base plate 11, a top plate 14, an inner side plate 12, an outer side plate 15, a front side plate 16, and a rear side plate 17. The top plate 14 is arranged parallel above the base plate 11 and has the same shape as the base plate 11. The inner side plate 12 and the outer side plate 15 are arranged opposite each other on both sides of the base plate 11 in a direction perpendicular to the ship's centerline, and their ends are connected to the top plate 14 and the base plate 11, respectively. The front side plate 16 and the rear side plate 17 are arranged opposite each other on both sides of the base plate 11 in the direction of the ship's centerline, and their ends are connected to the top plate 14 and the base plate 11, respectively. The base plate 11, the top plate 14, the inner side plate 12, the outer side plate 15, the front side plate 16, and the rear side plate 17 together form a light box 1 with a third opening 18. The inner side plate 12 of the light box 1 is embedded in the second opening, and the first opening 121 is provided on the inner side plate 12. The bottom plate 11, top plate 14, inner side plate 12, outer side plate 15, front side plate 16, and rear side plate 17 can effectively block the light from the portlight 200, allowing the light to be emitted to the outside at a specific angle through the third opening 18, thus satisfying the horizontal light arc of the portlight 200. Figure 1 The requirement for α is as follows. It is understandable that by changing the length of each structure of the light box 1, the angle of the emitted light can meet the requirements. Specifically, the horizontal light arc α should be as close as possible to, but not exceed, 112.5°.

[0046] Preferably, the inner wall of the receiving cavity and the sides of the first mounting plate 21 and the second mounting plate 22 facing the portlight 200 are all provided with a light-shielding layer. The light-shielding layer ensures the light-shielding properties of the portlight mounting device, so that light can only be emitted from the third opening 18 of the light box 1. Optionally, the light-shielding layer is painted with black paint.

[0047] Optionally, the inner side plate 12 is welded and fixed to the bulwark 101 to achieve a stable connection between the light box 1 and the ship 100. In this embodiment, all structures of the light box 1 are cut from steel plates, and after cutting, they need to be ground, deburred, and have their sharp edges treated.

[0048] Optionally, the locking element 3 is a bolt. The inner side plate 12 has a threaded hole, and the first mounting plate 21 has a mounting hole opposite to the threaded hole. The bolt passes through the mounting hole and is screwed into the threaded hole. The threaded connection method facilitates assembly and disassembly and provides a stable connection. Preferably, a washer is provided between the bolt head and the second mounting plate 22.

[0049] Optionally, a second elastic element 4 is provided between the light box 1 and the second mounting plate 22. The second mounting plate 22 makes elastic contact with the light box 1 through the second elastic element 4, so as to provide a buffer for the first mounting plate 21 when the light holder 2 is pulled out, ensuring stability during the pulling process and preventing the first mounting plate 21 and the light box 1 from colliding. The second elastic element 4 can also seal and fill the gap between the first mounting plate 21 and the light box 1, preventing seawater or rainwater from entering the interior of the ship 100 from the light box 1. Optionally, the second elastic element 4 is made of rubber material. Specifically, the second elastic element 4 is provided with a through hole opposite to the threaded hole, and the locking element 3 passes through the through hole into the second elastic element 4.

[0050] Optionally, see Figure 2 and Figure 5 The system also includes a fastener 5. A connector 212 is provided on the first mounting plate 21. The connector 212 can pass through the connecting plate 201 of the portlight 200. The fastener 5 is sleeved on the connector 212 and located on the side of the connecting plate 201 facing away from the first mounting plate 21. The fastener 5 can press the connecting plate 201 tightly against the first mounting plate 21. Specifically, the connecting plate 201 of the portlight 200 has a through hole opposite to the connector 212. When installing the portlight 200, the connector 212 passes through the through hole on the connecting plate 201, and then the fastener 5 is sleeved on the connector 212 to press the connecting plate 201 tightly onto the first mounting plate 21, thereby achieving the connection between the portlight 200 and the lamp holder 2. Optionally, the outer wall of the connector 212 is provided with external threads, and the fastener 5 is a nut. Preferably, a spring washer 6 is provided between the fastener 5 and the connecting plate 201 to increase the tightness of the fastener 5 and prevent the fastener 5 from falling off.

[0051] Optionally, a guide structure is provided on the first mounting plate 21, and two guide plates 111 are arranged opposite each other on the bottom plate 11 of the light box 1. The guide plates 111 extend along the pulling direction of the lamp holder 2, and the two guide plates 111 together form a guide groove. The two ends of the limiting plate 13 are respectively connected to the two guide plates 111. The guide structure can be inserted into the guide groove and slide in cooperation with the guide groove. The guide plates 111 can fix the limiting plate 13 in the receiving cavity; the two guide plates 111 together form a guide groove. The cooperation between the guide structure and the guide groove can ensure the stability when pulling the lamp holder 2, and can also make the limiting rod 211 stably inserted into the limiting hole 131.

[0052] Furthermore, a guide plate 111 is disposed on the side of the base plate 11 facing away from the porthole lamp 200. The base plate 11 has a through groove 112 communicating with the guide groove. The width of the through groove 112 is greater than the width of the guide groove. The first mounting plate 21 can be inserted into and slidably engaged with the through groove 112, and the top surface of the first mounting plate 21 is flush with the top surface of the base plate 11. That is, the through groove 112 and the guide groove together form a T-shaped groove to further ensure the stability of the lamp holder 2 when it is pulled out, while also confining the first mounting plate 21 to the base plate 11. This arrangement also prevents the first mounting plate 21 from protruding from the top surface of the base plate 11, keeping the top surface of the base plate 11 smooth and facilitating maintenance. In this embodiment, see reference... Figure 7 and Figure 8 The guide structure includes a first fixing plate 213 and two second fixing plates 214. The two second fixing plates 214 are disposed opposite to each other on the side of the first mounting plate 21 facing away from the port light 200. The two ends of the first fixing plate 213 are respectively connected to the ends of the two second fixing plates 214 near the light box 1. The limiting rod 211 is disposed on the side of the first fixing plate 213 facing the light box 1.

[0053] Preferably, the guide plate 111 includes a first plate and a second plate connected vertically. The first plate is connected to the base plate 11, and the two second plates form a guide groove, thereby increasing the contact area between the guide plate 111 and the base plate 11 and improving the connection strength between them. Optionally, the guide plate 111 is cut from angle steel and welded to the base plate 11.

[0054] Optionally, a handle 221 is provided on the side of the second mounting plate 22 facing away from the receiving cavity. The lamp holder 2 can be pulled out through the handle 221 to facilitate the maintenance and upkeep of the port light 200.

[0055] This embodiment also provides a method for installing an anchor light, which uses the above-described anchor light installation device and includes the following steps:

[0056] A second opening is made on the bulwark 101 opposite to the light box 1, and the light box 1 is embedded and installed in the second opening;

[0057] Connect the portlight 200 to the first mounting plate 21;

[0058] Move the first mounting plate 21 into the receiving cavity and make the second mounting plate 22 block the first opening 121.

[0059] The second opening provides installation space for the light box 1, ensuring the stability of the connection between the light box 1 and the bulwark 101. When maintaining the portlight 200, the lamp holder 2 can be pulled out to move into or out of the receiving cavity through the first opening 121, thereby allowing maintenance of the portlight 200 on the deck.

[0060] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A porthole light mounting device, characterized in that, include: A light box (1) is installed on the bulwark (101) of a ship (100). The light box (1) has a receiving cavity inside, and the side of the light box (1) facing the center line of the ship has a first opening (121) communicating with the receiving cavity. The lamp holder (2) is removably disposed in the receiving cavity and includes a first mounting plate (21) and a second mounting plate (22) connected together. The first mounting plate (21) is configured to be connected to the port light (200). By pulling the lamp holder (2), the port light (200) can be moved into or out of the receiving cavity through the first opening (121), and the second mounting plate (22) can block or open the first opening (121). The light of the port light (200) can be emitted to the outside through the lamp box (1) at a predetermined angle. A limiting plate (13) is provided inside the accommodating cavity, and a limiting rod (211) is provided at one end of the first mounting plate (21) that extends into the accommodating cavity. The limiting rod (211) can be inserted into the limiting hole (131) provided in the limiting plate (13) to limit the lamp holder (2) within the accommodating cavity. The first mounting plate (21) is provided with a guide structure. The bottom plate (11) of the light box (1) is provided with two guide plates (111) opposite to each other. The guide plates (111) extend along the pulling direction of the lamp holder (2). The two guide plates (111) together form a guide groove. The two ends of the limiting plate (13) are respectively connected to the two guide plates (111). The guide structure can be inserted into the guide groove and slide with the guide groove. A first elastic element (1311) is provided inside the limiting hole (131). During the process of inserting the limiting rod (211) into the limiting hole (131), the limiting rod (211) can elastically contact the first elastic element (1311).

2. The porthole light mounting device according to claim 1, characterized in that, The guide plate (111) is disposed on the side of the base plate (11) facing away from the port light (200). The base plate (11) is provided with a through groove (112) communicating with the guide groove. The width of the through groove (112) is greater than the width of the guide groove. The first mounting plate (21) can be inserted into the through groove (112) and slides with the through groove (112). The top surface of the first mounting plate (21) is flush with the top surface of the base plate (11).

3. The porthole light mounting device according to claim 1, characterized in that, The cross-sectional area of ​​the limiting rod (211) gradually decreases from the end connected to the first mounting plate (21) to the other end.

4. The porthole light mounting device according to any one of claims 1-3, characterized in that, It also includes a locking element (3) that can lock the second mounting plate (22) to the light box (1).

5. The porthole light mounting device according to claim 4, characterized in that, A second elastic element (4) is provided between the light box (1) and the second mounting plate (22), and the second mounting plate (22) is in elastic contact with the light box (1) through the second elastic element (4).

6. The porthole light mounting device according to any one of claims 1-3, characterized in that, It also includes fasteners (5), and a connector (212) is provided on the first mounting plate (21). The connector (212) can be inserted through the connecting plate (201) of the port light (200). The fastener (5) is sleeved on the connector (212) and located on the side of the connecting plate (201) facing away from the first mounting plate (21). The fastener (5) can press the connecting plate (201) tightly against the first mounting plate (21).

7. A method for installing sidelights, characterized in that, The application of the sidelight mounting device as described in any one of claims 1-6 includes the following steps: A second opening is made on the bulwark (101) opposite to the light box (1), and the light box (1) is embedded in the second opening; Connect the sidelight (200) to the first mounting plate (21); Move the first mounting plate (21) into the receiving cavity and make the second mounting plate (22) block the first opening (121).

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