Warehouse external gas-assisted exhaust fan

Abstract

The utility model provides a kind of warehouse external gas auxiliary exhaust fan, belong to warehouse ventilation technical field;Including fan body, the side inner wall of fan body is equipped with filter screen, the inner wall of one side of fan body away from filter screen is fixedly connected with support frame, the top of one side of fan body close to filter screen is rotatably connected with sealing plate, the cleaning mechanism one that can clean filter screen is installed on the sealing plate, the bottom inner wall of fan body is equipped with the cleaning mechanism two that can be cleaned to the dust that falls off in the cleaning of filter screen again.Cleaning mechanism one and cleaning mechanism two are set in the utility model, filter screen can be cleaned conveniently, at the same time, dust and sundries that fall off filter screen will be scraped off fan body by scraper, ensure the neatness of the bottom inner wall of fan body, avoid the situation that dust and sundries need additional cleaning in the bottom inner wall of fan body.

Description

Technical Field

[0001] This utility model relates to the field of warehouse ventilation technology, and in particular to an external gas auxiliary exhaust fan for warehouses. Background Technology

[0002] Warehouses are buildings used to store various goods, mainly grains, seeds, feed, fertilizers, raw materials, and commodities. They play a crucial role in cargo storage and supply chain management. Modern warehouses need to integrate intelligent systems and automated equipment to achieve efficient management. Single-function warehouses can no longer meet increasingly complex needs. They usually need to be equipped with air conditioning, fans, and other equipment to work together, and special warehouses should be designed according to the characteristics of different goods to maintain a constant temperature and humidity environment.

[0003] Fans can quickly expel harmful gases, dust, and odors from warehouses, introduce fresh air, maintain air circulation, prevent the accumulation of harmful gases, and prevent mold growth that could lead to spoilage of goods. Existing fans often accumulate dust on their filters during operation, and excessive dust can affect the fan's ventilation efficiency. Furthermore, filters are mostly bolted on, requiring tools for disassembly, which is quite troublesome. Therefore, this application provides an external auxiliary exhaust fan for warehouses to meet this need. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an external gas-assisted exhaust fan for warehouses to solve the problem that dust often accumulates on the filter screen during the operation of existing fans. If there is too much dust, it will affect the ventilation effect of the fan. Moreover, the filter screen is mostly installed with bolts, which requires tools to disassemble, making it quite troublesome.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] An external gas-assisted exhaust fan for warehouses includes a fan body, a filter screen installed on the inner side wall of the fan body, a support frame fixedly connected to the inner wall of the fan body on the side away from the filter screen, a sealing plate rotatably connected to the top of the fan body on the side near the filter screen, a first cleaning mechanism for cleaning the filter screen installed on the sealing plate, and a second cleaning mechanism for further cleaning the dust that has fallen from the filter screen installed on the inner bottom wall of the fan body.

[0007] The second cleaning mechanism includes a protrusion, which abuts against the bottom of the filter screen. Rotating rods are fixedly connected to both sides of the protrusion. Two opposing scrapers are fixedly connected to the outer wall of the rotating rod inside the blower body. The length of the scrapers does not exceed that of the protrusion. Both the protrusion and the scrapers can abut against the bottom inner wall of the blower body. The ends of the rotating rods away from the protrusion extend through the blower body to the outside and are fixedly connected to a gear.

[0008] Preferably, the cleaning mechanism includes two connecting plates rotatably connected to the sealing plate, the connecting plates being arranged opposite each other, and sliding grooves being provided on the inner walls of both sides of the fan body, with the same connecting rod slidably connected between the sliding grooves. The end of the connecting plate away from the sealing plate is sleeved on the connecting rod, and a cleaning cylinder is provided in the middle of the connecting rod, the cleaning cylinder being able to abut against the filter screen. Gears are fixedly connected to both sides of the sealing plate at the rotatable connection point with the fan body.

[0009] Preferably, a conveyor bar that meshes with both gear one and gear two is provided between gear one and gear two, and protective shells that can protect gear one, gear two and the conveyor bar are fixedly connected to the outer walls on both sides of the fan body.

[0010] Preferably, a second protrusion is fixedly connected to the bottom inner wall of the fan body, and the side of the second protrusion close to the first protrusion is an arc-shaped groove that can abut against the first protrusion.

[0011] Preferably, two hooks are fixedly connected to the top inner wall of the fan body, and the hooks are adapted to the connecting rod.

[0012] Preferably, a collection frame is slidably connected to the fan body below the filter screen, and a limiting spring block is fixedly connected to one side of the fan body to prevent the collection frame from sliding out.

[0013] Preferably, both sides of the filter screen are fixedly connected with locking blocks, and two fixing frames that can be adapted to the locking blocks are fixedly connected to the inner wall of the fan body. The two fixing frames are L-shaped and facing each other, and the locking blocks can slide up and down inside the fixing frames.

[0014] Preferably, spring rods are provided on both inner walls of the fan body. A "C"-shaped clip is fixedly connected to one end of the spring rod away from the inner wall of the fan body. The clip is adapted to the fixed frame and can block the top and bottom of the fixed frame.

[0015] Compared with the prior art, this utility model has at least the following beneficial effects:

[0016] In the above scheme, by setting up cleaning mechanism one, when the fan body needs to be started, the sealing plate can be rotated upward to open. When the sealing plate rotates, it will drive the connecting plate, which will drive the connecting rod to slide upward inside the slide groove. The cleaning cylinder on the connecting rod will rub against the filter screen to clean away the dust. At the same time, when the sealing plate rotates, it will drive the gear one on both sides of the rotating connection on the sealing plate to rotate together. When gear one rotates, it drives gear two through the conveyor bar, so that cleaning mechanism two runs.

[0017] By setting up a second cleaning mechanism, when dust falls, it lands on the bottom inner wall of the fan body. Gear 1 drives gear 2 to rotate via a transmission bar, which in turn drives a rotating rod. As the rod rotates, it drives a scraper to clean the bottom inner wall of the fan body. With the help of protrusion 2, it prevents dead corners from being missed. The dust is carried away from the fan body by the scraper and scraped away from the filter screen. At the same time, when the rod rotates, protrusion 1 will abut against the bottom of the filter screen, causing the filter screen to shake up and down, further shaking off the dust and debris on the filter screen. The advantage of this is that it makes it easy to clean the filter screen, and the dust and debris falling from the filter screen will be carried away from the fan body by the scraper, ensuring the cleanliness of the bottom inner wall of the fan body and avoiding the need for additional cleaning due to the accumulation of dust and debris on the bottom inner wall of the fan body.

[0018] By setting hooks, after the sealing plate is rotated upwards to open, the connecting rod can be hung on the two hooks, so that the connecting rod is limited by the hooks, thus keeping the sealing plate in an open state, which facilitates the operation of the fan body. By setting a collection box, after dust and debris are scraped away from the fan body by the scraper, they will fall directly into the collection box, which is convenient for collecting dust, garbage and debris. When it is necessary to deal with the debris in the collection box, simply press the limiting spring block, and the collection box can be removed by sliding, which makes it easy to deal with the debris in the collection box.

[0019] By setting up a fixed frame and locking blocks, when the filter screen is damaged and needs to be disassembled and repaired, the locking frames on both sides of the filter screen can be moved away from each other, causing the spring rod to retract. The locking frames will no longer limit the top and bottom of the fixed frame. Then, rotate the filter screen to rotate the locking blocks on both sides of the filter screen out of the fixed frame, and the filter screen can be taken out directly, completing the disassembly of the filter screen. When installation is required, continue to move the locking frames to retract the spring rod, place the repaired filter screen or the new filter screen on the inner wall of the fan body, and then rotate the filter screen to rotate the locking blocks back into the fixed frame, allowing the spring rod to drive the locking frames to reset, thus completing the installation. Moreover, the locking blocks can slide up and down inside the fixed frame, which makes it convenient for the filter screen to be moved up and down by the protrusion when rotating, thereby shaking off the dust. Attached Figure Description

[0020] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present disclosure and, together with the specification, further serve to explain the principles of the present disclosure and enable those skilled in the art to implement and use the present disclosure.

[0021] Figure 1 A three-dimensional structural diagram of an external auxiliary exhaust fan for warehouse gas;

[0022] Figure 2 A side view of the external gas auxiliary exhaust fan in the warehouse after removing the protective casing;

[0023] Figure 3 A three-dimensional enlarged structural diagram of the cleaning mechanism;

[0024] Figure 4 This is a magnified three-dimensional structural diagram of the cleaning mechanism.

[0025] Figure 5 A cross-sectional rear side view of the external gas auxiliary exhaust fan for the warehouse;

[0026] Figure 6 This is a magnified three-dimensional diagram of the filter screen structure.

[0027] Figure 7 for Figure 1 Enlarged structural diagram at point A in the middle;

[0028] Figure 8 for Figure 5 Enlarged structural diagram at point B.

[0029] [Attached reference numerals]: 1. Fan body; 2. Filter screen; 3. Sealing plate; 4. Cleaning mechanism one; 41. Connecting plate; 42. Connecting rod; 43. Cleaning cylinder; 5. Cleaning mechanism two; 51. Protrusion one; 52. Rotating rod; 53. Scraper; 6. Fixing frame; 7. Locking block; 8. Collection frame; 9. Limiting spring block; 10. Gear one; 11. Gear two; 12. Conveyor bar; 13. Protective shell; 14. Slide groove; 15. Spring rod; 16. Locking frame; 17. Support frame; 18. Protrusion two; 19. Hook.

[0030] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to the specific structure, device and environment. According to specific needs, those skilled in the art can adjust or modify these devices and environments, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0031] The following is a detailed description of an external gas-assisted exhaust fan for warehouses provided by this utility model, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit this utility model.

[0032] like Figures 1-5 and Figure 8 As shown, an embodiment of this utility model provides an external gas-assisted exhaust fan for a warehouse, including a fan body 1. A filter screen 2 is installed on the inner wall of the side of the fan body 1. A support frame 17 is fixedly connected to the inner wall of the fan body 1 on the side away from the filter screen 2. A sealing plate 3 is rotatably connected to the top of the fan body 1 on the side near the filter screen 2. A cleaning mechanism 4 for cleaning the filter screen 2 is installed on the sealing plate 3. A second cleaning mechanism 5 for cleaning the dust that has fallen off the filter screen 2 is installed on the inner wall of the bottom of the fan body 1. The second cleaning mechanism 5 includes a protrusion 51 that abuts against the bottom of the filter screen 2. A rotating rod 52 is fixedly connected to both sides of the protrusion 51. Two opposing scrapers 53 are fixedly connected to the outer wall of the rotating rod 52 inside the fan body 1. The length of the scrapers 53 does not exceed the length of the protrusion 51. Both the protrusion 51 and the scrapers 53 can abut against the inner wall of the bottom of the fan body 1. The ends of the rotating rods 52 away from the protrusion 51 penetrate the fan body 1. Extending outwards and fixedly connected to gear 11, the cleaning mechanism 4 includes two connecting plates 41 rotatably connected to the sealing plate 3. The connecting plates 41 are arranged opposite each other. Slide grooves 14 are provided on both inner walls of the fan body 1. The same connecting rod 42 is slidably connected between the slide grooves 14. The end of the connecting plate 41 away from the sealing plate 3 is sleeved on the connecting rod 42. A cleaning cylinder 43 is provided in the middle of the connecting rod 42. The cleaning cylinder 43 can abut against the filter screen 2. The sealing plate 3 is connected to the fan body 1. Gear 10 is fixedly connected to both sides of the rotating connection of body 1. A conveyor bar 12 is provided between gear 10 and gear 2 11, which meshes with both gear 10 and gear 2 11. Protective shells 13 that can protect gear 10, gear 2 11 and conveyor bar 12 are fixedly connected to both outer walls of the fan body 1. A protrusion 2 18 is fixedly connected to the bottom inner wall of the fan body 1. The side of protrusion 2 18 near protrusion 1 51 is an arc-shaped groove that can abut against protrusion 1 51.

[0033] By setting up cleaning mechanism 4, when the blower body 1 needs to be started, the sealing plate 3 can be rotated upward to open. When the sealing plate 3 rotates, it will drive the connecting plate 41. The connecting plate 41 will drive the connecting rod 42 to slide upward inside the slide groove 14. The cleaning cylinder 43 on the connecting rod 42 will rub against the filter screen 2 to clean away the dust. At the same time, when the sealing plate 3 rotates, it will drive the gear 10 on both sides of the rotating connection on the sealing plate 3 to rotate together. When the gear 10 rotates, it will drive the gear 2 11 through the conveyor bar 12, so that the cleaning mechanism 2 5 can run.

[0034] By setting up cleaning mechanism 2 5, when dust falls, it will land on the bottom inner wall of the fan body 1. Gear 1 10 drives gear 2 11 to rotate through conveyor 12, which in turn drives the rotating rod 52 to rotate. When the rotating rod 52 rotates, it drives the scraper 53 to clean the bottom inner wall of the fan body 1. With the help of protrusion 2 18, it prevents dead corners from being missed. The dust is driven by the scraper 53 to be scraped away from the fan body 1 in a direction away from the filter screen 2. At the same time, when the rotating rod 52 rotates, the protrusion 1 51 will abut against the bottom of the filter screen 2, causing the filter screen 2 to be shaken up and down by the protrusion 1 51, further shaking off the dust and debris on the filter screen 2. The advantage of this is that it makes it easy to clean the filter screen 2. At the same time, the dust and debris falling from the filter screen 2 will be driven away from the fan body 1 by the scraper 53, ensuring the cleanliness of the bottom inner wall of the fan body 1 and avoiding the situation where dust and debris accumulate on the bottom inner wall of the fan body 1 and require additional cleaning.

[0035] like Figure 1 , Figure 2 and Figure 5 As shown, two hooks 19 are fixedly connected to the top inner wall of the fan body 1. The hooks 19 are adapted to the connecting rod 42. A collection frame 8 is slidably connected to the fan body 1 below the filter screen 2. A limiting spring block 9 is fixedly connected to one side of the fan body 1 to prevent the collection frame 8 from sliding out. By setting the hooks 19, after the sealing plate 3 is rotated upward to open, the connecting rod 42 can be hung on the two hooks 19, so that the connecting rod 42 is limited by the hooks 19, thereby keeping the sealing plate 3 in an open state, which facilitates the operation of the fan body 1. By setting the collection frame 8, after dust and debris are scraped away from the fan body 1 by the scraper 53, they will fall directly into the inside of the collection frame 8, which is convenient for collecting dust, garbage and debris. When it is necessary to deal with the debris in the collection frame 8, simply press the limiting spring block 9, and the collection frame 8 can be removed by sliding the collection frame 8, which makes it easy to deal with the debris in the collection frame 8.

[0036] like Figure 1 , Figure 6 and Figure 7As shown, both sides of the filter screen 2 are fixedly connected with a locking block 7. Two fixing frames 6 that can be adapted to the locking block 7 are fixedly connected to the inner wall of the fan body 1. The two fixing frames 6 are L-shaped and facing each other. The locking block 7 can slide up and down inside the fixing frame 6. Both sides of the inner wall of the fan body 1 are provided with a spring rod 15. The end of the spring rod 15 away from the inner wall of the fan body 1 is fixedly connected with a locking frame 16 shaped like a C. The locking frame 16 is adapted to the fixing frame 6 and can block the top and bottom of the fixing frame 6.

[0037] By setting the fixed frame 6 and the locking block 7, when the filter screen 2 is damaged and needs to be disassembled and repaired, the locking frames 16 on both sides of the filter screen 2 can be moved away from each other, so that the spring rod 15 retracts. The locking frame 16 will no longer limit the top and bottom of the fixed frame 6. Then rotate the filter screen 2, and rotate the locking blocks 7 on both sides of the filter screen 2 out of the fixed frame 6, so that the filter screen 2 can be taken out directly, completing the disassembly of the filter screen 2. When installation is required, continue to move the locking frame 16 to retract the spring rod 15, place the repaired filter screen 2 or the new filter screen 2 on the inner wall of the fan body 1, and then rotate the filter screen 2 to rotate the locking block 7 back into the fixed frame 6, so that the spring rod 15 drives the locking frame 16 to reset, thus completing the installation. Moreover, the locking block 7 can slide up and down inside the fixed frame 6, so that when the protrusion 51 rotates, the filter screen 2 is driven by the protrusion 51 to slide up and down and shake off the dust.

[0038] The technical solution provided by this utility model, by setting up a cleaning mechanism 4, can rotate the sealing plate 3 upward to open when the fan body 1 needs to be started. When the sealing plate 3 rotates, it will drive the connecting plate 41, and the connecting plate 41 will drive the connecting rod 42 to slide upward inside the slide groove 14. The cleaning cylinder 43 on the connecting rod 42 will rub against the filter screen 2 to clean away the dust. At the same time, when the sealing plate 3 rotates, it will drive the gear 10 on both sides of the rotating connection on the sealing plate 3 to rotate together. When the gear 10 rotates, it will drive the gear 2 11 through the conveyor bar 12, so that the cleaning mechanism 2 5 can run.

[0039] By setting up cleaning mechanism 2 5, when dust falls, it will land on the bottom inner wall of the fan body 1. Gear 1 10 drives gear 2 11 to rotate through conveyor 12, which in turn drives the rotating rod 52 to rotate. When the rotating rod 52 rotates, it drives the scraper 53 to clean the bottom inner wall of the fan body 1. With the help of protrusion 2 18, it prevents dead corners from being missed. The dust is driven by the scraper 53 to be scraped away from the fan body 1 in a direction away from the filter screen 2. At the same time, when the rotating rod 52 rotates, the protrusion 1 51 will abut against the bottom of the filter screen 2, causing the filter screen 2 to be shaken up and down by the protrusion 1 51, further shaking off the dust and debris on the filter screen 2. The advantage of this is that it makes it easy to clean the filter screen 2. At the same time, the dust and debris falling from the filter screen 2 will be driven away from the fan body 1 by the scraper 53, ensuring the cleanliness of the bottom inner wall of the fan body 1 and avoiding the situation where dust and debris accumulate on the bottom inner wall of the fan body 1 and require additional cleaning.

[0040] By setting hooks 19, after the sealing plate 3 is rotated upward to open, the connecting rod 42 can be hung on the two hooks 19, so that the connecting rod 42 is limited by the hooks 19, thereby keeping the sealing plate 3 in an open state, which facilitates the operation of the fan body 1. By setting a collection box 8, after dust and debris are scraped away from the fan body 1 by the scraper 53, they will fall directly into the inside of the collection box 8, which is convenient for collecting dust, garbage and debris. When it is necessary to deal with the debris in the collection box 8, simply press the limiting spring block 9, and the collection box 8 can be removed by sliding the collection box 8, which makes it easy to deal with the debris in the collection box 8.

[0041] By setting the fixed frame 6 and the locking block 7, when the filter screen 2 is damaged and needs to be disassembled and repaired, the locking frames 16 on both sides of the filter screen 2 can be moved away from each other, so that the spring rod 15 retracts. The locking frame 16 will no longer limit the top and bottom of the fixed frame 6. Then rotate the filter screen 2, and rotate the locking blocks 7 on both sides of the filter screen 2 out of the fixed frame 6, so that the filter screen 2 can be taken out directly, completing the disassembly of the filter screen 2. When installation is required, continue to move the locking frame 16 to retract the spring rod 15, place the repaired filter screen 2 or the new filter screen 2 on the inner wall of the fan body 1, and then rotate the filter screen 2 to rotate the locking block 7 back into the fixed frame 6, so that the spring rod 15 drives the locking frame 16 to reset, thus completing the installation. Moreover, the locking block 7 can slide up and down inside the fixed frame 6, so that when the protrusion 51 rotates, the filter screen 2 is driven by the protrusion 51 to slide up and down and shake off the dust.

[0042] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details have been described in detail in the above preferred embodiments; however, those skilled in the art can fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0043] Those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc.

[0044] 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 principle 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 warehouse external gas-assisted exhaust fan, characterized by, include: A fan body (1) is provided with a filter screen (2) installed on the inner side wall of the fan body (1). A support frame (17) is fixedly connected to the inner side wall of the fan body (1) away from the filter screen (2). A sealing plate (3) is rotatably connected to the top of the side of the fan body (1) close to the filter screen (2). A cleaning mechanism (4) for cleaning the filter screen (2) is installed on the sealing plate (3). A cleaning mechanism (5) for cleaning the dust that has fallen off the filter screen (2) is installed on the inner bottom wall of the fan body (1). The second cleaning mechanism (5) includes a first protrusion (51), which abuts against the bottom of the filter screen (2). A rotating rod (52) is fixedly connected to both sides of the first protrusion (51). Two opposing scrapers (53) are fixedly connected to the outer wall of the rotating rod (52) inside the blower body (1). The length of the scraper (53) does not exceed the first protrusion (51). The first protrusion (51) and the scraper (53) can both abut against the bottom inner wall of the blower body (1). The end of the rotating rod (52) away from the first protrusion (51) extends through the blower body (1) to the outside and is fixedly connected to a second gear (11).

2. The warehouse external gas-assisted exhaust fan of claim 1, wherein, The cleaning mechanism (4) includes two connecting plates (41) that are rotatably connected to the sealing plate (3). The connecting plates (41) are arranged opposite to each other. Slide grooves (14) are provided on both sides of the inner wall of the fan body (1). The same connecting rod (42) is slidably connected between the slide grooves (14). The end of the connecting plate (41) away from the sealing plate (3) is sleeved on the connecting rod (42). A cleaning cylinder (43) is provided in the middle of the connecting rod (42). The cleaning cylinder (43) can abut against the filter screen (2). Gears (10) are fixedly connected on both sides of the sealing plate (3) at the rotatable connection with the fan body (1).

3. The warehouse external gas-assisted exhaust fan of claim 2, wherein, A conveyor bar (12) is provided between the first gear (10) and the second gear (11) to mesh with both the first gear (10) and the second gear (11). Protective shells (13) that can protect the first gear (10), the second gear (11) and the conveyor bar (12) are fixedly connected to the outer walls on both sides of the blower body (1).

4. The warehouse external gas-assisted exhaust fan of claim 1, wherein, The bottom inner wall of the fan body (1) is fixedly connected to a second protrusion (18). The side of the second protrusion (18) near the first protrusion (51) is an arc-shaped groove and can abut against the first protrusion (51).

5. The warehouse external gas-assisted exhaust fan of claim 2, wherein, Two hooks (19) are fixedly connected to the top inner wall of the fan body (1), and the hooks (19) are adapted to the connecting rod (42).

6. The warehouse external gas-assisted exhaust fan of claim 1, wherein, A collection frame (8) is slidably connected to the fan body (1) below the filter screen (2), and a limiting spring block (9) is fixedly connected to one side of the fan body (1) to prevent the collection frame (8) from sliding out.

7. The warehouse external gas-assisted exhaust fan of claim 1, wherein, Both sides of the filter screen (2) are fixedly connected with a locking block (7). Two fixing frames (6) that can be adapted to the locking block (7) are fixedly connected to the inner wall of the fan body (1). The two fixing frames (6) are L-shaped and facing each other. The locking block (7) can slide up and down inside the fixing frame (6).

8. The warehouse external gas-assisted exhaust fan of claim 7, wherein, Both sides of the inner wall of the fan body (1) are provided with spring rods (15). The end of the spring rod (15) away from the inner wall of the fan body (1) is fixedly connected to a "C" shaped card frame (16). The card frame (16) is adapted to the fixed frame (6) and can block the top and bottom of the fixed frame (6).

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