Curing barn tobacco clamp loading and unloading equipment with dynamic locking function

Abstract

The utility model discloses a curing barn tobacco clamp loading and unloading device with a dynamic locking function, which relates to the technical field of tobacco leaf curing and comprises a frame body, two opposite side walls of the frame body are movably provided with tobacco carrying frames; the pulley assembly is in transmission connection with the top of the tobacco carrying frame; the driving motor is detachably arranged on the outer side of the frame body, the driving motor, the pulley assembly and the tobacco carrying frame are in transmission connection through a cable, and the driving motor is used for controlling the tobacco carrying frame to ascend and descend; the first locking assembly is arranged between the driving motor and the pulley assembly and located on the cable path, and the first locking assembly is used for limiting movement of the cable so as to lock the first suspension state of the tobacco carrying frame; the second locking assembly is arranged between the first locking assembly and the pulley assembly and located on the cable path, and the second locking assembly is used for limiting movement of the cable so as to lock the second suspension state of the tobacco carrying frame. In this way, the driving motor is detachably arranged on the outer side of the frame body, one motor can be used for multiple tobacco curing barns, and the use cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of tobacco curing technology, and in particular to a tobacco clamp loading and unloading device for curing barns with dynamic locking. Background Technology

[0002] Currently, large-scale, intensive curing barns have been widely adopted in tobacco production, replacing the old-fashioned brick-and-mortar structure. Intensive curing barns have the advantages of large tobacco capacity, energy saving, labor saving, and high curing efficiency. However, tobacco curing is still a labor-intensive agricultural activity. When the tobacco leaves are hung in rows in the curing barn, due to the high height inside the barn and the fixed frame used to hang the tobacco leaves, workers often need to use ladders and other tools to climb up and hang them. This not only increases the labor intensity of workers and reduces efficiency, but also poses a high safety risk.

[0003] In existing technologies, lifting equipment is installed in the tobacco curing barn. The lifting equipment's lifting movement enables the tobacco leaves to be stratified and accommodated in layers. However, this method places the lifting equipment inside the curing barn, where the temperature and humidity are high. This requires special design for the lifting equipment to ensure it can operate continuously and normally in a high-temperature and high-humidity environment. Consequently, the manufacturing, installation, and maintenance costs of the lifting equipment are high. Furthermore, each curing barn needs to have its own lifting equipment to continuously lift the tobacco leaves and achieve stratification, which further increases the operating costs for a group of curing barns. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, the present invention provides a tobacco clamp loading and unloading device for a curing barn with dynamic locking.

[0005] To achieve the above objectives, this utility model provides a tobacco clamp loading and unloading device for a curing barn with dynamic locking, comprising:

[0006] The frame has two opposite side walls on which tobacco racks are movably installed, and the two tobacco racks are used to hold tobacco clips.

[0007] A pulley assembly that is driven to the top of the tobacco carrying frame;

[0008] A drive motor is detachably mounted on the outside of the frame. The drive motor, pulley assembly, and tobacco carrying frame are connected by cable transmission. The drive motor is used to control the lifting and lowering of the tobacco carrying frame.

[0009] A first locking component is disposed between the drive motor and the pulley assembly and located on the cable path. The first locking component is used to limit the movement of the cable to lock the first suspension state of the cigarette holder.

[0010] A second locking assembly is disposed between the first locking assembly and the pulley assembly and located on the cable path. The second locking assembly is used to limit the movement of the cable to lock the second suspension state of the cigarette holder.

[0011] Preferably, the height of the cigarette holder in the first suspension state is greater than its height in the second suspension state.

[0012] Preferably, the first locking component is disposed at a first position at the bottom of the frame, and the second locking component is disposed at a second position at the bottom of the frame. When the cable moves from the second position to the first position, the cigarette holder is raised by a distance equal to the height of the cigarette holder.

[0013] Preferably, the first locking assembly includes a first column, a first slide rail, a first limiting member, and a second limiting member. The first limiting member is fixed to both sides of the first slide rail and is positioned at the first position. The first slide rail is arranged along the length of the frame and its two ends are fixedly connected to the first column. The second limiting member is detachably connected to the drive motor and the pulley assembly through the cable. When the drive motor controls the lifting and lowering of the tobacco rack, the second limiting member moves along the first slide rail.

[0014] A first through hole is provided on the first limiting member and the second limiting member. The first through hole is used for the insertion of the first limiting pin. When the second limiting member moves to the position of the first limiting member, the first limiting pin is inserted into the first through hole to lock the first suspension state of the cigarette holder.

[0015] Preferably, the second locking assembly includes a second column and a third limiting member, the third limiting member being fixed to the second column, and the second column being disposed on the side of the cable connecting the pulley assembly and the first locking assembly;

[0016] A second through hole is provided on the third limiting member. The second through hole is used for the insertion of the first limiting pin. When the second limiting member moves to the position of the third limiting member, the first limiting pin is inserted into the first through hole and the second through hole to lock the second suspension state of the cigarette holder.

[0017] Preferably, the pulley assembly includes a first fixed pulley, a second fixed pulley, a third fixed pulley, and a fourth fixed pulley;

[0018] The first fixed pulley is fixed to the top of the tobacco carrying frame, and at least one first fixed pulley is provided. The second fixed pulley is provided on the top of the frame and is located directly above the tobacco carrying frame. The third fixed pulley is provided at the corner between the top of the frame and the side wall. The fourth fixed pulley is provided at the corner between the bottom of the frame and the side wall. The third fixed pulley is located directly above the fourth fixed pulley. The third and fourth fixed pulleys are provided on the side of the frame away from the drive motor.

[0019] Preferably, the first fixed pulley, the second fixed pulley, the third fixed pulley, and the fourth fixed pulley are connected by the cable, and the distance between the first position and the second position is twice the product of the number of the first fixed pulleys and the height of the tobacco rack.

[0020] Preferably, a first crossbeam is provided in the frame body, and the first crossbeam is fixedly connected to the tobacco carrying racks located on both sides of the frame body. The first crossbeam is located at the top of the tobacco carrying racks, and the first fixed pulley is fixedly connected to the first crossbeam. The drive motor is used to pull the first crossbeam so that the two tobacco carrying racks move synchronously.

[0021] Preferably, a second crossbeam is provided on both side walls along the length of the frame, and the two second crossbeams are used to place cigarette clips;

[0022] The tobacco carrier is movable between the second crossbeam and the top of the frame.

[0023] Preferably, when the tobacco rack is in the first suspended state, there is a first gap between the top of the tobacco rack and the top of the frame, and the first gap is used for ventilation;

[0024] The height of the second crossbeam is set such that when the second crossbeam holds the tobacco clip, there is a second gap between the bottom of the tobacco leaf in the tobacco clip and the bottom of the frame, and the second gap is used for ventilation.

[0025] Based on this, the beneficial effects of this utility model are as follows:

[0026] By detachably mounting the drive motor on the outside of the frame, the high temperature and humidity resistance requirements of the drive motor are eliminated, reducing manufacturing, installation and maintenance costs. The drive motor can be disassembled, and when it is disassembled, the suspension state of the tobacco rack is locked by the first and second locking components, allowing the drive motor to be reused in other tobacco curing barns without having to set up a separate drive motor for each tobacco curing barn, further reducing usage costs. Attached Figure Description

[0027] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0028] Figure 1 A schematic diagram illustrating the structure of a frame according to one embodiment of the present invention;

[0029] Figure 2 This schematic diagram shows the front view of the frame according to one embodiment of the present invention;

[0030] Figure 3 This diagram illustrates the usage state of the first locking component according to one embodiment of the present invention.

[0031] Figure 4 This illustration shows one embodiment of the present invention. Figure 2 Enlarged schematic diagram of the second locking component;

[0032] Explanation of reference numerals in the attached drawings: 10-Frame, 101-Second crossbeam, 102-First spacing, 103-Second spacing, 20-Tobacco rack, 201-First crossbeam, 30-Pulley assembly, 301-Cable, 302-First fixed pulley, 303-Second fixed pulley, 304-Third fixed pulley, 305-Fourth fixed pulley, 40-Drive motor, 50-First locking assembly, 501-First column, 502-First slide rail, 503-First limiting member, 504-Second limiting member, 505-First through hole, 506-First limiting pin, 60-Second locking assembly, 601-Second column, 602-Third limiting member, 603-Second through hole. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms "a," "the," and "the" as used in the embodiments of this application are also intended to include the plural forms unless the context clearly indicates otherwise.

[0035] It should be understood that although the terms first, second, third, etc., may be used to describe related structures in the embodiments of this application, these related structures should not be limited to these terms. These terms are only used to distinguish related structures from each other.

[0036] Depending on the context, the word "if" as used here can be interpreted as "when" or "when". Similarly, depending on the context, the phrase "if determined" can be interpreted as "when determined" or "when (the condition or event of the statement) is detected".

[0037] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should also be understood that when it is mentioned that an element is formed "upper" or "lower" of another element, it can not only be formed directly "upper" or "lower" of the other element, but also indirectly "upper" or "lower" of the other element through an intermediate element.

[0038] Figure 1 This is a schematic diagram illustrating the structure of a frame according to one embodiment of the present invention. Figure 2 This schematic diagram shows a front view of the frame according to one embodiment of the present invention, such as... Figure 1 , 2 As shown, this utility model discloses a tobacco clamp loading and unloading device for a curing barn with dynamic locking, comprising:

[0039] The frame 10 has two opposite side walls on which tobacco racks 20 are movably installed. The two tobacco racks 20 are used to hold tobacco clips.

[0040] The pulley assembly 30 is connected to the top of the tobacco carrier 20 via a drive mechanism;

[0041] The drive motor 40 is detachably mounted on the outside of the frame 10. The drive motor 40, pulley assembly 30 and tobacco rack 20 are connected by cable 301. The drive motor 40 is used to control the lifting and lowering of the tobacco rack 20.

[0042] The first locking component 50 is disposed between the drive motor 40 and the pulley assembly 30 and is located on the path of the cable 301. The first locking component 50 is used to limit the movement of the cable 301 to lock the first suspension state of the cigarette holder 20.

[0043] The second locking component 60 is disposed between the first locking component 50 and the pulley component 30 and is located on the path of the cable 301. The second locking component 60 is used to limit the movement of the cable 301 to lock the second suspension state of the cigarette holder 20.

[0044] Specifically, the height of the cigarette holder 20 in the first suspension state is greater than its height in the second suspension state. The first locking component 50 is located at the first position at the bottom of the frame 10, and the second locking component 60 is located at the second position at the bottom of the frame 10. When the cable 301 moves from the second position to the first position, the cigarette holder 20 is raised by a distance equal to the height of the cigarette holder 20.

[0045] With this configuration, the present invention places the drive motor 40 outside the frame 10, so that the drive motor 40 does not need to be installed inside the tobacco curing barn and does not need to be specially designed to withstand high temperature and high humidity, thus reducing manufacturing, installation and maintenance costs. At the same time, the drive motor 40 can be detached and installed on the outside of the frame 10, so that after the tobacco curing barn is loaded, the drive motor 40 can be removed and installed in other tobacco curing barns in the group of tobacco curing barns for the tobacco loading operation, which can realize the recycling of the drive motor 40 and eliminate the need to configure a separate drive motor 40 for each tobacco curing barn, further saving costs.

[0046] Meanwhile, when the drive motor 40 is disassembled, the first and second suspension states of the tobacco rack 20 can be locked by the first locking component 50 and the second locking component 60 to ensure that the tobacco rack 20 will not fall off after the drive motor 40 is disassembled.

[0047] Furthermore, Figure 3 This diagram schematically illustrates the usage state of the first locking component according to one embodiment of the present invention. Figure 4 This illustration shows one embodiment of the present invention. Figure 2 An enlarged schematic diagram of the second locking component is shown below. Figure 3 , 4 As shown:

[0048] The first locking assembly 50 includes a first column 501, a first slide rail 502, a first limiting member 503, and a second limiting member 504. The first limiting member 503 is fixed to both sides of the first slide rail 502 and is set in a first position. The first slide rail 502 is set along the length of the frame 10 and its two ends are fixedly connected to the first column 501. The second limiting member 504 is detachably connected to the drive motor 40 and the pulley assembly 30 through the cable 301. When the drive motor 40 controls the lifting and lowering of the tobacco rack 20, the second limiting member 504 moves along the first slide rail 502.

[0049] A first through hole 505 is provided on the first limiting member 503 and the second limiting member 504. The first through hole 505 is used for the insertion of the first limiting pin 506. When the second limiting member 504 moves to the position of the first limiting member 503, the first limiting pin 506 is inserted into the first through hole 505 to lock the first suspension state of the cigarette holder 20.

[0050] Specifically, a first hook (not shown in the figure) is provided on both sides of the second limiting member 504, and a second hook (not shown in the figure) is provided on the cable 301. By connecting the second hook with the first hook, the second limiting member 504 is connected to the drive motor 40 and the second limiting member 504 is connected to the pulley assembly 30.

[0051] In its initial state, the second limiting member 504 is located in the area at the bottom of the frame 10 between the first limiting member 503 and the pulley assembly 30. When the drive motor 40 pulls the cable 301, the second limiting member 504 gradually moves closer to the first limiting member 503. When the two correspond, the tobacco rack 20 moves to its highest point. At this time, the tobacco rack 20 is in the second suspension state. By controlling the first limiting pin 506 to insert into the first through hole 505, the second limiting member 504 cannot move further relative to the first limiting member 503, thus locking the second suspension state of the tobacco rack 20. At this time, the drive motor 40 can be disassembled and installed in other tobacco curing barns for repeated use.

[0052] Furthermore, the second locking assembly 60 includes a second post 601 and a third limiting member 602. The third limiting member 602 is fixed on the second post 601. The second post 601 is disposed on the side of the cable 301 connecting the pulley assembly 30 and the first locking assembly 50.

[0053] A second through hole 603 is provided on the third limiting member 602. The second through hole 603 is used for the insertion of the first limiting pin 506. When the second limiting member 504 moves to the position of the third limiting member 602, the first limiting pin 506 is inserted into the first through hole 505 and the second through hole 603 to lock the second suspension state of the cigarette holder 20.

[0054] Specifically, the second column 601 is vertically installed at the bottom of the frame 10. In the initial state, the second limiting member 504 is located between the second limiting member 504 and the bottom of the pulley assembly 30. When the drive motor 40 pulls the cable 301, the second limiting member 504 moves towards the second column 601. At this time, the tobacco rack 20 is lifted. When the second limiting member 504 corresponds to the third limiting member 602, the two are fixedly connected by inserting the first limiting pin 506, thereby locking the second suspension state of the tobacco rack 20. This allows the drive motor 40 to be disassembled and used in other tobacco curing barns.

[0055] With this configuration, the first locking component 50 and the second locking component 60 ensure that the suspension state of the tobacco rack 20 is locked when the drive motor 40 is disassembled, thus enabling the layered placement of tobacco leaves in the tobacco curing barn.

[0056] Furthermore, the pulley assembly 30 includes a first fixed pulley 302, a second fixed pulley 303, a third fixed pulley 304, and a fourth fixed pulley 305;

[0057] The first fixed pulley 302 is fixed to the top of the tobacco carrying frame 20, and at least one first fixed pulley 302 is provided. The second fixed pulley 303 is provided on the top of the frame 10 and is located directly above the tobacco carrying frame 20. The third fixed pulley 304 is provided at the corner between the top of the frame 10 and the side wall. The fourth fixed pulley 305 is provided at the corner between the bottom of the frame 10 and the side wall. The third fixed pulley 304 is located directly above the fourth fixed pulley 305. The third fixed pulley 304 and the fourth fixed pulley 305 are provided on the side of the frame 10 away from the drive motor 40.

[0058] Specifically, the first fixed pulley 302, the second fixed pulley 303, the third fixed pulley 304 and the fourth fixed pulley 305 are connected by a cable 301, and the distance between the first position and the second position is twice the product of the number of the first fixed pulleys 302 and the height of the tobacco rack 20.

[0059] When there is one first fixed pulley 302, whenever the tobacco rack 20 rises, the cables 301 on both sides of the first fixed pulley 302 move synchronously a certain distance. When the drive motor 40 pulls, it needs to pull the cables 301 to move twice the distance. Similarly, when there are two first fixed pulleys 302, whenever the tobacco rack 20 rises, the cables 301 on both sides of the two first fixed pulleys 302 move synchronously a certain distance. When the drive motor 40 pulls, it needs to pull the cables 301 to move four times the distance.

[0060] By setting the first fixed pulley 302, the second fixed pulley 303, the third fixed pulley 304 and the fourth fixed pulley 305, when the drive motor 40 is externally mounted on the frame 10, the transmission direction is changed by setting the fixed pulleys, changing the horizontal pulling of the drive motor 40 to the vertical pulling, thereby realizing the lifting and lowering of the tobacco rack 20.

[0061] Furthermore, a first crossbeam 201 is provided inside the frame 10. The first crossbeam 201 is fixedly connected to the tobacco racks 20 located on both sides of the frame 10. The first crossbeam 201 is located at the top of the tobacco racks 20. The first fixed pulley 302 is fixedly connected to the first crossbeam 201. The drive motor 40 is used to pull the first crossbeam 201 so that the two tobacco racks 20 move synchronously, thereby realizing the lifting of the tobacco clip.

[0062] Furthermore, two second crossbeams 101 are provided on the two side walls along the length of the frame 10. The two second crossbeams 101 are used to place tobacco clips. The tobacco rack 20 is movable between the second crossbeams 101 and the top of the frame 10, so that the frame 10 and the tobacco rack 20 can work together to achieve more layered storage of tobacco leaves.

[0063] Furthermore, when the smoke-carrying frame 20 is in the first suspended state, there is a first gap 102 between the top of the smoke-carrying frame 20 and the top of the frame 10, and the first gap 102 is used for ventilation;

[0064] The height of the second crossbeam 101 is set such that when the tobacco clip is placed on the second crossbeam 101, there is a second gap 103 between the bottom of the tobacco leaf in the tobacco clip and the bottom of the frame 10. The second gap 103 is used for ventilation, so that when the tobacco leaf is cured in the tobacco curing room, the airflow can enter from the first gap 102, pass through the tobacco leaf and exit from the second gap 103 at the bottom, realize airflow circulation and increase the tobacco curing efficiency.

[0065] In summary, by using the solution of this utility model, the drive motor 40 is placed externally on the frame 10, eliminating the need for special requirements for high temperature and humidity resistance of the drive motor 40, thus reducing its manufacturing, installation, and maintenance costs. Furthermore, the drive motor 40 is detachably mounted on the outside of the frame 10, allowing it to be removed from the tobacco curing barn after it is filled with tobacco leaves and installed in another tobacco curing barn for further loading. This enables the drive motor 40 to be recycled, eliminating the need for a separate drive motor 40 for each tobacco curing barn, saving costs. Moreover, when the drive motor 40 is removed, the first locking component 50 and the second locking component 60 can lock the tobacco carrying frame 20 in its suspended state, ensuring that the tobacco carrying frame 20 does not fall off after the drive motor 40 is removed.

[0066] The above description is merely a preferred embodiment of this application. Those skilled in the art should understand that the scope of disclosure in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A tobacco clamp loading and unloading device for a curing barn with dynamic locking, characterized in that, include: The frame has two opposite side walls on which tobacco racks are movably installed, and the two tobacco racks are used to hold tobacco clips. A pulley assembly that is driven to the top of the tobacco carrying frame; A drive motor is detachably mounted on the outside of the frame. The drive motor, pulley assembly, and tobacco carrying frame are connected by cable transmission. The drive motor is used to control the lifting and lowering of the tobacco carrying frame. A first locking component is disposed between the drive motor and the pulley assembly and located on the cable path. The first locking component is used to limit the movement of the cable to lock the first suspension state of the cigarette holder. A second locking assembly is disposed between the first locking assembly and the pulley assembly and located on the cable path. The second locking assembly is used to limit the movement of the cable to lock the second suspension state of the cigarette holder.

2. The tobacco clamp loading and unloading equipment for a curing barn with dynamic locking as described in claim 1, characterized in that, The height of the cigarette holder in the first suspension state is greater than its height in the second suspension state.

3. The tobacco clamp loading and unloading equipment for a curing barn with dynamic locking as described in claim 2, characterized in that, The first locking component is located at a first position at the bottom of the frame, and the second locking component is located at a second position at the bottom of the frame. When the cable moves from the second position to the first position, the cigarette holder is raised by a distance equal to the height of the cigarette holder.

4. The tobacco clamp loading and unloading device for a curing barn with dynamic locking as described in claim 3, characterized in that, The first locking assembly includes a first column, a first slide rail, a first limiting member, and a second limiting member. The first limiting member is fixed to both sides of the first slide rail and is positioned at the first position. The first slide rail is arranged along the length of the frame and its two ends are fixedly connected to the first column. The second limiting member is detachably connected to the drive motor and the pulley assembly through the cable. When the drive motor controls the lifting and lowering of the tobacco rack, the second limiting member moves along the first slide rail. A first through hole is provided on the first limiting member and the second limiting member. The first through hole is used for the insertion of the first limiting pin. When the second limiting member moves to the position of the first limiting member, the first limiting pin is inserted into the first through hole to lock the first suspension state of the cigarette holder.

5. The tobacco clamp loading and unloading device for a curing barn with dynamic locking as described in claim 4, characterized in that, The second locking assembly includes a second column and a third limiting member. The third limiting member is fixed on the second column, and the second column is disposed on the side of the cable connecting the pulley assembly and the first locking assembly. A second through hole is provided on the third limiting member. The second through hole is used for the insertion of the first limiting pin. When the second limiting member moves to the position of the third limiting member, the first limiting pin is inserted into the first through hole and the second through hole to lock the second suspension state of the cigarette holder.

6. The tobacco clamp loading and unloading device for a curing barn with dynamic locking as described in claim 3, characterized in that, The pulley assembly includes a first fixed pulley, a second fixed pulley, a third fixed pulley, and a fourth fixed pulley; The first fixed pulley is fixed to the top of the tobacco carrying frame, and at least one first fixed pulley is provided. The second fixed pulley is provided on the top of the frame and is located directly above the tobacco carrying frame. The third fixed pulley is provided at the corner between the top of the frame and the side wall. The fourth fixed pulley is provided at the corner between the bottom of the frame and the side wall. The third fixed pulley is located directly above the fourth fixed pulley. The third and fourth fixed pulleys are provided on the side of the frame away from the drive motor.

7. A tobacco clamp loading and unloading device for a curing barn with dynamic locking as described in claim 6, characterized in that, The first, second, third, and fourth fixed pulleys are connected by the cable, and the distance between the first and second positions is twice the product of the number of the first fixed pulleys and the height of the tobacco rack.

8. A tobacco clamp loading and unloading device for a curing barn with dynamic locking as described in claim 6, characterized in that, A first crossbeam is provided inside the frame, and the first crossbeam is fixedly connected to the tobacco carrying racks located on both sides of the frame. The first crossbeam is located at the top of the tobacco carrying racks, and the first fixed pulley is fixedly connected to the first crossbeam. The drive motor is used to pull the first crossbeam so that the two tobacco carrying racks move synchronously.

9. A tobacco clamp loading and unloading device for a curing barn with dynamic locking as described in claim 2, characterized in that, A second crossbeam is provided on both side walls along the length of the frame, and the two second crossbeams are used to place cigarette clips; The tobacco carrier is movable between the second crossbeam and the top of the frame.

10. A tobacco clamp loading and unloading device for a curing barn with dynamic locking as described in claim 9, characterized in that, When the smoke-carrying frame is in the first suspended state, there is a first gap between the top of the smoke-carrying frame and the top of the frame body, and the first gap is used for ventilation; The height of the second crossbeam is set such that when the second crossbeam holds the tobacco clip, there is a second gap between the bottom of the tobacco leaf in the tobacco clip and the bottom of the frame, and the second gap is used for ventilation.

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