Corrugated board flattening machine

Abstract

The utility model relates to the technical field of corrugated board flattening, in particular to a corrugated board flattening machine which comprises a conveying assembly, first springs arranged on the inner walls of the bottoms of corresponding sliding holes respectively, first motors arranged on the corresponding first springs respectively, and first rotating wheels arranged on output shafts of the corresponding first motors respectively. Compared with the prior art, first gears can be driven to rotate through starting of the second motors to drive first racks to move the first motors and first rotating wheels, corrugated paper of different widths is conveyed, and when the first rotating wheels press the corrugated paper of different thicknesses, the first motors are driven to rotate to drive the second motors to rotate to drive the first racks to move the first motors and the first rotating wheels to rotate. And a first spring extends to drive a first motor to move so as to transport corrugated paper with different thicknesses, so that the safety of the device in use is improved, meanwhile, the device is prevented from being damaged by a tool when the tool encounters special conditions during transportation, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of corrugated paperboard flattening, in particular to a corrugated paperboard flattening machine. Background Art

[0002] In the production process of corrugated paper, after the corrugated paper and the face paper are glued together, they often shrink and deform during the drying process due to environmental problems, affecting the quality of the product. Therefore, the performance of the corrugated paper flattening facility has become an important link that directly affects the corrugated paper production process.

[0003] After searching, the utility model patent with Chinese publication number CN213564712U discloses a corrugated cardboard flattening machine, which includes a machine body, an upper pressing plate, a pressing plate platform and a cylinder, characterized in that the hydraulic cylinder is arranged on the outside of the machine body, the hydraulic piston rod is movably arranged on the connecting plate, a movable rod is arranged in the middle of the connecting plate, the movable rod passes through the connecting plate, and is connected to a fixed plate through the top of the frame, the middle of the bottom end of the fixed plate is fixedly connected with a connecting rod, the bottom end of the connecting rod is arranged with an upper pressing plate, a slide groove for the upper pressing plate to move up and down is arranged on the side wall of the machine body, and the upper pressing plate is movably connected to the side wall of the machine body through the slide groove buckle. The utility model has the advantages of: strengthening the full pressing and bonding of the surface of the corrugated paper, the pressure can be quickly understood, and the pressure can be adjusted at any time to make the pressing and bonding fast and improve the bonding degree.

[0004] Although the above technical solution solves the problem of pressing and bonding and can adjust the pressure at any time, there is no obvious conveying mechanism in the above technical solution. After the corrugated paper is pressed, it is still necessary to take out the finished product manually or with tools, which may cause harm to the workers, or the tools may damage the device, affecting the use of the device and increasing maintenance costs. Therefore, a corrugated cardboard flattening machine is needed. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a corrugated cardboard flattening machine, which solves the technical problem that the corrugated cardboard needs to be taken out manually after being pressed.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0009] In a first aspect, an embodiment of the utility model provides a corrugated cardboard flattening machine, comprising a carrying frame, a conveying assembly and a flattening assembly, wherein the conveying assembly is arranged on the carrying frame, and the conveying assembly and the carrying frame are rotatably connected;

[0010] The flattening assembly is arranged on the carrying frame, and the flattening assembly is slidably connected to the carrying frame;

[0011] The conveying component and the flattening component cooperate to flatten the corrugated paper and convey the finished product out, characterized in that it also includes a transmission mechanism;

[0012] The transmission mechanism is arranged on the flattening assembly, and the transmission mechanism is rotatably connected with the flattening assembly. The transmission mechanism makes the paper into corrugated paper through operation, and then the flattening assembly flattens the paper.

[0013] The conveying assembly comprises:

[0014] Two sliding holes, each of which is respectively opened on two sides of the carrying frame;

[0015] A plurality of first springs, each of which is disposed on the bottom inner wall of the corresponding sliding hole;

[0016] A plurality of first motors, each of which is disposed on a corresponding first spring;

[0017] A plurality of first rotating wheels, each of which is disposed on an output shaft of a corresponding first motor;

[0018] A plurality of first racks, each of which is disposed on a corresponding first motor;

[0019] A plurality of first slide grooves, each of which is respectively arranged on two sides of the carrying frame;

[0020] A plurality of first sliding blocks, each of which is arranged on an inner wall of a corresponding first sliding groove;

[0021] A plurality of second motors, each of the second motors is respectively arranged on a corresponding first sliding block;

[0022] A plurality of first gears are provided, each of the first gears is respectively arranged on an output shaft of the corresponding second motor, and each of the first gears is respectively meshed with a corresponding first rack.

[0023] The utility model provides a corrugated cardboard flattening machine, wherein the second motor cooperates with the first gear and the first rack to move the first motor and the first rotating wheel to move paper of different widths, and the first spring cooperates with the first slider to move the second motor to move paper of different thicknesses.

[0024] Optionally, the flattening assembly comprises:

[0025] A plurality of first mounting plates, each of which is respectively arranged at the bottom and the top of the carrying frame;

[0026] A plurality of first hydraulic cylinders, each of which is disposed on a corresponding first mounting plate;

[0027] A plurality of hydraulic push rods, each of which is disposed on the corresponding first hydraulic cylinder;

[0028] A plurality of first sliding plates, each of which is disposed on a corresponding hydraulic push rod;

[0029] A plurality of square grooves are respectively provided on two sides of the first sliding plate located at the bottom.

[0030] Optionally, the transmission mechanism includes:

[0031] A plurality of first rollers, each of which is disposed on the carrying frame, and one end of each of which passes through the carrying frame and is provided with a second gear;

[0032] Two corrugated rollers, each of which is arranged on the bearing frame, and one end of each of which passes through the bearing frame and is provided with a third gear;

[0033] A plurality of fourth gears, each of which is disposed on a side of the carrying frame through a mounting plate, and each of which is meshed with each of the second gears and each of the third gears;

[0034] a first rotating column, wherein the first rotating column is arranged on the fourth gear located at the top;

[0035] a third motor, wherein the third motor is arranged on the inner wall of the carrying frame;

[0036] A plurality of first baffles, each of which is respectively arranged on the top of the first rotating column and the output shaft of the third motor;

[0037] A first belt is drivingly connected between the first baffle and the first rotating column.

[0038] Optionally, a plurality of second rollers, each of which is disposed on the top of the carrying frame, and one end of each of which passes through the carrying frame and is provided with a fifth gear;

[0039] a fourth motor, the fourth motor being arranged on the inner wall of the carrying frame;

[0040] A plurality of second rotating columns, each of which is arranged on an output end of the fourth motor and each of the fifth gears;

[0041] A plurality of second baffles, each of the second baffles is disposed on each of the second rotating columns;

[0042] A second belt, wherein the second belt is arranged between the second rotating columns.

[0043] Optionally, a plurality of third rollers, each of which is arranged at the bottom of the carrying frame, and one end of each of which passes through the carrying frame and is provided with a sixth gear;

[0044] a fifth motor, the fifth motor being arranged on an inner wall of the carrying frame;

[0045] A plurality of third rotating columns, each of which is arranged on the output end of the fifth motor and each of the sixth gears;

[0046] A plurality of third baffles, each of the third baffles is disposed on each of the third rotating columns;

[0047] A third belt is arranged between each of the third rotating columns.

[0048] Optionally, a plurality of dustproof frames are provided, each of the dustproof frames is respectively arranged at two ends of the carrying frame, and each of the dustproof frames covers the corresponding conveying assembly.

[0049] (III) Beneficial effects

[0050] The beneficial effects of the utility model are as follows: the utility model is a corrugated cardboard flattening machine, which adopts the first spring, the first motor, the first rotating wheel, the first rack, the first slider, the second motor and the first gear. Compared with the prior art, the second motor can be started to drive the first gear to rotate, and the rotation of the first gear drives the first rack to move, thereby moving the first motor and the first rotating wheel, so as to realize the transportation of corrugated paper of different widths. When the first rotating wheel presses corrugated paper of different thicknesses, the first spring extends to drive the first motor to move, and the movement of the first motor drives the first slider to move, so as to realize the transportation of corrugated paper of different thicknesses, avoid special circumstances during manual transportation and cause harm to personnel, increase the safety of the device when in use, and also prevent the tool from encountering special circumstances during transportation and causing the tool to cause harm to the device, thereby reducing the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a schematic diagram of the structure of the utility model;

[0052] Figure 2 It is a side schematic diagram of the utility model;

[0053] Figure 3 It is a schematic diagram of the flattening assembly of the utility model; Figure 4 It is a schematic diagram of the conveying component of the present utility model.

[0054] [Description of Reference Numerals]

[0055] 1: Loading frame;

[0056] 2: Conveying components;

[0057] 201: first spring;

[0058] 202: first motor;

[0059] 203: first rotating wheel;

[0060] 204: first rack;

[0061] 205: first slider;

[0062] 206: second motor;

[0063] 207: first gear;

[0064] 3: Flatten the components;

[0065] 301: first mounting plate;

[0066] 302: first hydraulic cylinder;

[0067] 303: Hydraulic push rod;

[0068] 304: first sliding plate;

[0069] 4: Transmission mechanism;

[0070] 401: first roller;

[0071] 402: corrugated roller;

[0072] 403: fourth gear;

[0073] 404: first rotating column;

[0074] 405: the third motor;

[0075] 406: first baffle;

[0076] 407: First belt;

[0077] 5: Second roller;

[0078] 6: the fourth motor;

[0079] 7: second rotating column;

[0080] 8: second baffle;

[0081] 9: Second belt;

[0082] 10: the third roller;

[0083] 11: fifth motor;

[0084] 12: third rotating column;

[0085] 13: The third baffle;

[0086] 14: The third belt;

[0087] 15: dustproof frame;

[0088] 16. Second gear;

[0089] 17. Third gear;

[0090] 18. Fifth gear;

[0091] 19. Sixth gear. DETAILED DESCRIPTION

[0092] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below in conjunction with the accompanying drawings through specific implementation methods. The directional terms "upper", "lower" and so on mentioned herein are based on the orientation of the drawings.

[0093] According to the embodiment of the utility model, the staff starts the second motor 206, the second motor 206 starts to drive the first gear 207 to rotate, the first gear 207 rotates to drive the first rack 204 to move, the first rack 204 moves to drive the first motor 202 to move, the first motor 202 moves to drive the first rotating wheel 203 to move, and then starts the first motor 202, the first motor 202 starts to drive the first rotating wheel 203 to rotate, so as to transport corrugated paper of different widths.

[0094] When corrugated paper of different thicknesses needs to be transported, the first rotating wheel 203 presses on the corrugated paper to be transported, and at the same time the first spring 201 is extended. The extension of the first spring 201 drives the second motor 206 to move, and the movement of the second motor 206 drives the first slider 205 to slide, so as to transport corrugated paper of different thicknesses.

[0095] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0096] Embodiment 1:

[0097] Reference Figures 1 to 4In this embodiment, it includes a carrying frame 1, a conveying component 2 and a flattening component 3. The conveying component 2 is rotatably connected to the carrying frame 1, and the flattening component 3 is slidably connected to the carrying frame 1. The conveying component 2 and the flattening component 3 cooperate to flatten the corrugated paper and convey the finished product out. It also includes a transmission mechanism 4, which is rotatably connected to the flattening component 3. The transmission mechanism 4 makes paper into corrugated paper through work, and then the flattening component 3 flattens it. The conveying component 2 includes two sliding holes, each of which is respectively opened on both sides of the carrying frame 1. Each first spring 201 is respectively fixedly connected to the bottom inner wall of the corresponding sliding hole, each first motor 202 is respectively fixedly connected to the corresponding first spring 201, each first rotating wheel 203 is respectively fixedly connected to the output shaft of the corresponding first motor 202, each first rack 204 is respectively fixedly connected to the corresponding first motor 202, and each first slide groove is respectively opened On both sides of the carrying frame 1, each first slider 205 is slidably connected to the inner wall of the corresponding first slide groove, each second motor 206 is fixedly connected to the corresponding first slider 205, each first gear 207 is fixedly connected to the output shaft of the corresponding second motor 206, and each first gear 207 is meshed with the corresponding first rack 204. The function of the first spring 201 is to connect the first motor 202, and at the same time move the first motor 202 through the contraction and extension of the first spring 201. The function of the first motor 202 is to drive the first rotating wheel 203 to rotate to convey corrugated paper. The function of the first slider 205 is to drive the second motor 206 to move by sliding with the first spring 201, so as to convey corrugated paper of different thicknesses. The function of the first gear 207 is to cooperate with the first rack 204 to move the first motor 202 and the first rotating wheel 203 for conveying corrugated paper of different widths.

[0098] Embodiment 2:

[0099] Reference Figure 3 In this embodiment, the flattening assembly 3 includes: a plurality of first mounting plates 301, each first mounting plate 301 is fixedly connected to the bottom and the top of the bearing frame 1, each first hydraulic cylinder 302 is fixedly connected to the corresponding first mounting plate 301, each hydraulic push rod 303 is slidably connected to the corresponding first hydraulic cylinder 302, each first sliding plate 304 is fixedly connected to the corresponding hydraulic push rod 303, and each square groove is respectively provided on both sides of the first sliding plate 304 located at the bottom. The function of the first mounting plate 301 is to install the first hydraulic cylinder 302, and the function of the first hydraulic cylinder 302 is to drive the hydraulic push rod 303 to move through hydraulic pressure, thereby driving the first sliding plate 304 to slide, so as to flatten the corrugated paper.

[0100] Embodiment 3:

[0101] Reference Figure 1 and Figure 2In this embodiment, the transmission mechanism 4 includes: a plurality of first rollers 401, each of which is rotatably connected to the carrier frame 1, and one end of each of which passes through the carrier frame 1 and is fixedly connected to the second gear 16, each of which is rotatably connected to the carrier frame 1, and one end of each of which passes through the carrier frame 1 and is fixedly connected to the third gear 17, each of which is rotatably connected to the side of the carrier frame 1 through a mounting plate, and each of which is meshed with the second gear and the third gear 17, a first rotating column 404 is fixedly connected to the fourth gear 403 at the top, a third motor 405 is fixedly connected to the inner wall of the carrier frame 1, and each of which is a first baffle 406. They are respectively fixedly connected to the top of the first rotating column 404 and the output shaft of the third motor 405. The first belt 407 is transmission-connected between the first baffle 406 and the first rotating column 404. The function of the first roller 401 is to transport paper to the corrugated roller 402 to make corrugated paper. The function of the second gear 16 is to cooperate with the fourth gear 403 to drive the first roller 401 to rotate. The function of the third gear 17 is to cooperate with the fourth gear 403 to drive the corrugated roller 402 to rotate to produce corrugated paper. The function of the first rotating column 404 is to cooperate with the first belt 407 and the first baffle 406 to drive the fourth gear 403 to rotate under the drive of the third motor 405, thereby driving the third gear 17 and the second gear 16 to rotate.

[0102] Embodiment 4:

[0103] Reference Figure 1 In this embodiment, each second roller 5 is rotatably connected to the top of the carrying frame 1, and one end of each second roller 5 passes through the carrying frame 1 and is fixedly connected to the fifth gear 18, the fourth motor 6 is fixedly connected to the inner wall of the carrying frame 1, each second rotating column 7 is fixedly connected to the output end of the fourth motor 6 and each fifth gear 18, each second baffle 8 is fixedly connected to each second rotating column 7, and the second belt 9 is rotatably connected between each second rotating column 7. When the fourth motor 6 is started, the fifth gear 18 is driven to rotate through the second baffle 8, the second rotating column 7 and the second belt 9, thereby driving the second roller 5 to rotate, and the upper layer of paper is transported in, which is convenient for subsequent flattening, because corrugated paper is generally composed of three layers.

[0104] Embodiment 5:

[0105] Reference Figure 1In this embodiment, each third roller 10 is rotatably connected to the bottom of the carrying frame 1, and one end of each third roller 10 passes through the carrying frame 1 and is fixedly connected to the sixth gear 19, the fifth motor 11 is fixedly connected to the inner wall of the carrying frame 1, each third rotating column 12 is fixedly connected to the output end of the fifth motor 11 and each sixth gear 19, each third baffle 13 is fixedly connected to each third rotating column 12, and the third belt 14 is transmission-connected between each third rotating column 12. When the fifth motor 11 is started, the fifth gear 18 is driven to rotate through the third baffle 13, the third rotating column 12 and the third belt 14, thereby driving the third roller 10 to rotate, and the upper layer of paper is transported in, which is convenient for subsequent flattening.

[0106] Embodiment 6:

[0107] Reference Figure 4 In this embodiment, a plurality of dustproof frames 15 are provided, each of which is fixedly connected to both ends of the carrier frame 1, and each of which covers the corresponding conveying assembly 2. The function of the dustproof frame 15 is to prevent dust and the like from entering and causing damage to the device, thereby affecting the use of the device.

[0108] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0109] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0110] In the present utility model, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0111] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0112] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A corrugated cardboard flattening machine, comprising a carrying frame (1), a conveying assembly (2) and a flattening assembly (3), wherein the conveying assembly (2) is arranged on the carrying frame (1), and the conveying assembly (2) and the carrying frame (1) are rotatably connected; The flattening component (3) is arranged on the carrying frame (1), and the flattening component (3) is slidably connected to the carrying frame (1); The conveying component (2) and the flattening component (3) cooperate to flatten the corrugated paper and convey the finished product, and are characterized in that: Also includes a transmission mechanism (4); The transmission mechanism (4) is arranged on the flattening component (3), and the transmission mechanism (4) is rotatably connected to the flattening component (3). The transmission mechanism (4) makes the paper into corrugated paper through operation, and then the flattening component (3) flattens the paper. The conveying assembly (2) comprises: Two sliding holes, each of the sliding holes is respectively arranged on two sides of the carrying frame (1); A plurality of first springs (201), each of the first springs (201) being arranged on the bottom inner wall of the corresponding sliding hole; A plurality of first motors (202), each of the first motors (202) being arranged on a corresponding first spring (201); A plurality of first rotating wheels (203), each of the first rotating wheels (203) being respectively arranged on an output shaft of a corresponding first motor (202); a plurality of first racks (204), each of the first racks (204) being arranged on a corresponding first motor (202); A plurality of first slide grooves, each of the first slide grooves being respectively arranged on two sides of the carrying frame (1); A plurality of first sliding blocks (205), each of the first sliding blocks (205) being arranged on an upper inner wall of a corresponding first sliding groove; a plurality of second motors (206), each of the second motors (206) being arranged on a corresponding first slider (205); A plurality of first gears (207), each of the first gears (207) is respectively arranged on an output shaft of a corresponding second motor (206), and each of the first gears (207) is respectively meshed with a corresponding first rack (204).

2. A corrugated board flattening machine as claimed in claim 1, characterized in that: The flattening assembly (3) comprises: A plurality of first mounting plates (301), each of the first mounting plates (301) being respectively arranged at the bottom and the top of the carrying frame (1); A plurality of first hydraulic cylinders (302), each of the first hydraulic cylinders (302) being arranged on a corresponding first mounting plate (301); A plurality of hydraulic push rods (303), each of the hydraulic push rods (303) being arranged on a corresponding first hydraulic cylinder (302); A plurality of first sliding plates (304), each of the first sliding plates (304) being respectively arranged on a corresponding hydraulic push rod (303); A plurality of square grooves are respectively provided on two sides of the first sliding plate (304) located at the bottom.

3. A corrugated board flattening machine as claimed in claim 2, characterized in that: The transmission mechanism (4) comprises: a plurality of first rollers (401), each of the first rollers (401) being arranged on the carrying frame (1), and one end of each of the first rollers (401) passing through the carrying frame (1) and being provided with a second gear (16); Two corrugated rollers (402), each of the corrugated rollers (402) being arranged on the supporting frame (1), and one end of each of the corrugated rollers (402) passing through the supporting frame (1) and being provided with a third gear (17); a plurality of fourth gears (403), each of the fourth gears (403) being arranged on a side surface of the carrying frame (1) via a mounting plate, and each of the fourth gears (403) being meshed with each of the second gears and each of the third gears (17); A first rotating column (404), wherein the first rotating column (404) is arranged on the fourth gear (403) located at the top; A third motor (405), the third motor (405) being arranged on the inner wall of the carrying frame (1); A plurality of first baffles (406), each of the first baffles (406) being respectively arranged on the top of the first rotating column (404) and on the output shaft of the third motor (405); A first belt (407), the first belt (407) is drivingly connected between the first baffle (406) and the first rotating column (404).

4. A corrugated board flattening machine as claimed in claim 3, characterized in that: a plurality of second rollers (5), each of the second rollers (5) being arranged on the top of the carrying frame (1), and one end of each of the second rollers (5) passing through the carrying frame (1) and being provided with a fifth gear (18); A fourth motor (6), the fourth motor (6) being arranged on the inner wall of the carrying frame (1); a plurality of second rotating columns (7), each of the second rotating columns (7) being arranged on an output end of the fourth motor (6) and each of the fifth gears (18); A plurality of second baffles (8), each of the second baffles (8) being arranged on each of the second rotating columns (7); A second belt (9), wherein the second belt (9) is arranged between each of the second rotating columns (7).

5. A corrugated board flattening machine as claimed in claim 4, characterized in that: a plurality of third rollers (10), each of the third rollers (10) being arranged at the bottom of the carrying frame (1), and one end of each of the third rollers (10) passing through the carrying frame (1) and being provided with a sixth gear (19); a fifth motor (11), the fifth motor (11) being arranged on the inner wall of the carrying frame (1); a plurality of third rotating columns (12), each of the third rotating columns (12) being arranged on an output end of the fifth motor (11) and each of the sixth gears (19); A plurality of third baffles (13), each of the third baffles (13) being arranged on each of the third rotating columns (12); A third belt (14), wherein the third belt (14) is arranged between each of the third rotating columns (12).

6. A corrugated board flattening machine as claimed in claim 5, characterized in that: A plurality of dustproof frames (15), each of the dustproof frames (15) is respectively arranged at two ends of the carrying frame (1), and each of the dustproof frames (15) covers the corresponding conveying assembly (2).

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