Bag feeding structure for bag feeding type packaging machine capable of conveying packaging bags conveniently

Abstract

The bag feeding structure for the bag feeding type packaging machine convenient for conveying the packaging bags comprises a mounting bracket, a mounting plate is arranged at the rear end of the mounting bracket, a bag discharging assembly is fixedly mounted on the top surface of the mounting plate, the bag discharging assembly comprises a material storage box, a placing plate is arranged at the front end of the mounting bracket, and a connecting frame is arranged right above the placing plate; a rotating assembly is fixedly installed in the connecting frame and comprises a fixing base, a rotating disc is rotationally connected to the center of the front end face of the fixing base, and two adsorption assemblies used for adsorbing packaging bags are movably connected to the front end face of the rotating disc in an up-down symmetrical mode. The two adsorption assemblies are driven by the rotating assembly to rotate to sequentially adsorb and transport packaging bags, the working efficiency is greatly improved, the end face of the suction cup support and the containing plate are always kept horizontal through the single-side double-connecting-rod design, vacuum suction cups are prevented from being overturned, and the stability of the device is enhanced; meanwhile, the distance between the bottom end of the movable baffle and the surface of the inclined plate can be adjusted according to the thicknesses of different packaging bags, and practicability of the device is enhanced.

Description

Technical Field

[0001] The invention relates to the field of packaging machines, in particular to a bag feeding structure for a bag feeding type packaging machine which is convenient for conveying packaging bags. Background Art

[0002] In modern industrial production, automation is a key development trend. With the continuous expansion of the scale of manufacturing industry, the efficiency requirements for product packaging are getting higher and higher. The traditional manual packaging method is inefficient and difficult to meet the needs of large-scale production. Bag-feeding packaging machines came into being. It can automatically complete a series of packaging operations such as bag taking, bag opening, filling, and sealing, which greatly improves the packaging efficiency. The bag feeding structure that facilitates the conveying of packaging bags is the basic link to realize packaging automation.

[0003] After massive searches, it was found that the prior art publication number is CN 217146574U, which discloses a bag feeding device for a packaging machine, including a support frame, and also including a bag clamping mechanism and a bag pulling mechanism fixed on the support frame, the bag pulling mechanism is located below the bag clamping mechanism, the bag pulling mechanism can clamp or loosen the packaging bag, the bag clamping mechanism can clamp or loosen the packaging bag relative to the bag pulling mechanism, and the bag pulling mechanism can reciprocate back and forth relative to the bag clamping mechanism at right angles to the clamping direction to convey the packaging bag.

[0004] When the scheme is used, the bag pulling mechanism receives and clamps the packaging bag, and then moves toward the bag clamping mechanism. After the bag pulling mechanism moves a certain distance, the bag clamping mechanism clamps the packaging bag from above the bag pulling mechanism. After the bag clamping mechanism clamps the packaging bag, the bag pulling mechanism retreats to the initial position and receives a new bag again. At the same time, the bag pulling mechanism clamps the packaging bag clamped by the clamping mechanism again, driving the clamped packaging bag to move forward, and the cycle is repeated, thereby completing the purpose of automatic packaging bag delivery. Compared with the cam delivery structure, the bag delivery device in the present application has a relatively simple structure, low cost, stable operation, and easy debugging and maintenance.

[0005] Therefore, based on the above search and in combination with the existing technology, the bag feeding device of the existing packaging machine often has only one bag clamping mechanism. In the actual operation of the machine, due to the long stroke and slow speed of the bag clamping mechanism, the bag pulling mechanism also reduces the bag transport speed in order to match the speed of the bag clamping mechanism, which greatly reduces the overall working efficiency of the machine. Summary of the invention

[0006] The object of the present invention is to provide a bag feeding structure for a bag feeding type packaging machine which is convenient for conveying packaging bags, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A bag feeding structure for a bag-feeding packaging machine that is convenient for conveying packaging bags comprises a mounting bracket, a mounting plate is provided at the rear end of the mounting bracket, a bag outlet assembly is fixedly installed on the top surface of the mounting plate, the bag outlet assembly comprises a material storage box, a placement plate is provided at the front end of the mounting bracket, a connecting frame is provided directly above the placement plate, a rotating assembly is fixedly installed in the connecting frame, the rotating assembly comprises a fixed seat, a rotating disk is rotatably connected to the center of the front end surface of the fixed seat, and two groups of adsorption assemblies for adsorbing packaging bags are symmetrically and movably connected to the front end surface of the rotating disk.

[0009] Furthermore, a box cover is connected to one side of the top surface of the storage box, and an inclined plate is extended from the inside to the outside of the bottom of the storage box to facilitate subsequent bag taking operations. A bag outlet is opened on the front end surface of the storage box at the inclined plate.

[0010] Furthermore, two sliding hole sleeves are provided on the front end surface of the storage box just above the bag outlet, and a movable baffle is slidably connected in the sliding hole sleeve. A connecting tube is provided at the center of the top surface of the movable baffle, and a threaded rod is rotatably connected in the connecting tube. A threaded sleeve is fixedly installed on the front end surface of the storage box, and the threaded sleeve is threadedly connected to the threaded rod.

[0011] Furthermore, the storage box is integrally formed with two extension arms on the left and right sides of the bag outlet, and a feed roller is rotatably connected between the two extension arms. The rotating shaft at the right end of the feed roller passes through the extension arm and is coaxially connected to a motor 1, and the rotating shaft at the left end of the feed roller passes through the extension arm and is coaxially fixedly installed with a driving wheel.

[0012] Furthermore, an installation groove is opened on the top surface of the inclined plate located in the storage box, and a push roller is rotatably connected in the installation groove. After the rotating shaft of the left end face of the push roller passes through the side wall of the storage box, a driven wheel is coaxially fixedly installed thereon, and a transmission belt is jointly sleeved on the outer wall of the driven wheel and the driving wheel.

[0013] Furthermore, a gear ring is coaxially fixedly installed on the outer wall of the rotating disk, and a mounting arm is integrally formed on the outer wall of the fixed seat. A pinion is rotatably connected to the end of the mounting arm. The rotating shaft of the pinion passes through the mounting arm and is coaxially connected to motor 2. The pinion is meshingly and transmission-connected with the gear ring.

[0014] Furthermore, two groups of connecting plates are symmetrically installed on the front end surface of the rotating disk, and each group of connecting plates includes two connecting plates symmetrically installed on the left and right. The two groups of adsorption components are movably connected to the two groups of connecting plates respectively. Each group of adsorption components includes a suction cup bracket, and a vacuum suction cup is installed at the center of the top surface of the suction cup bracket. Two connecting rods are hinged on the left and right end surfaces of the suction cup bracket, and the ends of the four connecting rods away from the suction cup bracket are hinged to the end surfaces of the two connecting plates respectively.

[0015] Furthermore, a telescopic cylinder is fixedly installed at the center of the front end surface of the rotating disk, and the telescopic end of the telescopic cylinder is fixedly connected to a moving plate. The upper and lower ends of the moving plate are hinged with linkage rods, and the two linkage rods are respectively slidably connected to the connecting rods of the two groups of adsorption components.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the present invention, the rotating assembly drives two groups of adsorption assemblies to rotate and sequentially adsorb and transport the packaging bags, which greatly increases the work efficiency. The single-sided double-link design keeps the end surface of the suction cup bracket level with the placement plate at all times, preventing the vacuum suction cup from flipping over and enhancing the stability of the device.

[0018] 2. In the present invention, by rotating the torsion plate, the threaded rod is driven to rotate in the threaded sleeve. According to the thickness of the single-layer packaging bag in the storage box, the distance between the bottom end of the movable baffle and the surface of the inclined plate is adjusted, so that the device can transport packaging bags of different thicknesses, thereby enhancing the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is an exploded view of the overall structure of the present invention;

[0021] Figure 3 It is a cross-sectional view of the overall structure of the present invention;

[0022] Figure 4 It is an exploded view of the bag discharging assembly structure of the present invention;

[0023] Figure 5 It is an enlarged view of the local structure of the present invention;

[0024] Figure 6 It is an exploded view of the local structure of the present invention.

[0025] In the figure: 1, mounting bracket; 11, mounting plate; 12, placing plate; 13, connecting frame; 14, supporting leg; 2, bag discharging assembly; 21, material storage box; 211, tilting plate; 212, sliding hole sleeve; 213, threaded sleeve; 214, extension arm; 22, box cover; 221, grip; 23, movable baffle; 231, light rod; 232, connecting tube; 24, threaded rod; 25, feeding roller; 251, main Driving wheel; 26. Motor 1; 27. Pushing roller; 271. Driven wheel; 28. Transmission belt; 3. Rotating assembly; 31. Fixed seat; 311. Mounting arm; 32. Rotating disk; 321. Connecting plate; 33. Gear ring; 34. Pinion; 35. Motor 2; 36. Telescopic cylinder; 37. Moving plate; 38. Linking rod; 4. Adsorption assembly; 41. Suction cup bracket; 42. Vacuum suction cup; 43. Connecting rod. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example 1: Please refer to Figure 1 to Figure 4 A bag feeding structure for a bag feeding packaging machine for conveniently conveying packaging bags comprises a mounting bracket 1, a mounting plate 11 is arranged at the rear end of the mounting bracket 1, a bag discharging assembly 2 is fixedly mounted on the top surface of the mounting plate 11, and the bag discharging assembly 2 comprises a material storage box 21, specifically, the bottom surface of the material storage box 21 is fixedly connected to the mounting plate 11 by bolts, a placement plate 12 is arranged at the front end of the mounting bracket 1, specifically, the surface of the placement plate 12 is flat and smooth, and blocking plates for preventing the packaging bags from falling off are arranged at both the left and right ends and the front end of the placement plate 12, and legs 14 are fixedly connected at the four corners of the bottom surface of the mounting bracket 1, and a connecting frame 13 is arranged just above the placement plate 12 A rotating component 3 is fixedly installed in the connecting frame 13, and the rotating component 3 includes a fixed seat 31. Specifically, a mounting ring is provided at the center of the connecting frame 13, and the outer wall of the fixing seat 31 is fixedly connected to the inner wall of the mounting ring. A rotating disk 32 is rotatably connected at the center of the front end surface of the fixing seat 31. Specifically, a mounting hole is opened at the center of the front end surface of the fixing seat 31, and a rotating shaft is integrally formed on the rear end surface of the rotating disk 32. The rotating shaft is rotatably connected in the mounting hole. The rotating hole has a limiting effect on the rotating shaft to prevent the rotating disk 32 from falling off. Two groups of adsorption components 4 for adsorbing packaging bags are symmetrically and movably connected to the front end surface of the rotating disk 32.

[0028] A box cover 22 is connected to one side of the top surface of the storage box 21. Specifically, a handle 221 is fixedly installed on the top surface of the box cover 22 for convenient opening of the box cover 22. The box cover 22 can prevent debris from falling into the storage box 21. An inclined plate 211 is extended from the inside to the outside at the bottom of the storage box 21, which is convenient for subsequent bag taking operations. A bag outlet is opened at the inclined plate 211 on the front end surface of the storage box 21. Specifically, the inclined plate 211 and the bottom surface of the storage box 21 are inclined at a certain angle. The inclination angle can make the packaging bag slide toward the bag outlet by itself under the action of gravity. Two sliding hole sleeves 212 are provided on the front end surface of the storage box 21 just above the bag outlet, and a movable baffle 23 is slidably connected in the sliding hole sleeve 212. Specifically, two light rods 231 are integrally formed on the top surface of the movable baffle 23 The two bare rods 231 are respectively slidably connected in the two sliding hole sleeves 212, and a connecting tube 232 is provided at the center of the top surface of the movable baffle 23. A threaded rod 24 is rotatably connected in the connecting tube 232. A threaded sleeve 213 is fixedly installed on the front end surface of the storage box 21, and the threaded sleeve 213 is threadedly connected with the threaded rod 24. Specifically, a rotating block is provided at the bottom of the threaded rod 24, and the rotating block is rotatably clamped in the connecting tube 232, which has a limiting effect on the threaded rod 24 to prevent the threaded rod 24 from falling off. A torsion plate is welded and fixed on the top surface of the threaded rod 24. By rotating the torsion plate, the threaded rod 24 is driven to rotate in the threaded sleeve 213. According to the thickness of the single-layer packaging bag in the storage box 21, the distance between the bottom end of the movable baffle 23 and the surface of the inclined plate 211 is adjusted.

[0029] The storage box 21 is integrally formed with two extension arms 214 on the left and right sides of the bag outlet, and a feeding roller 25 is rotatably connected between the two extension arms 214. The rotating shaft at the right end of the feeding roller 25 passes through the extension arm 214 and is coaxially connected to a motor 26. The rotating shaft at the left end of the feeding roller 25 passes through the extension arm 214 and is coaxially fixedly installed with a driving wheel 251. Specifically, a plurality of rubber strips for increasing friction are equidistantly provided on the circumference of the outer wall of the feeding roller 25, and the rubber strips abut against the top surface of the inclined plate 211. A mounting groove is provided on the top surface of the inclined plate 211 located in the storage box 21, and a pushing roller 27 is rotatably connected in the mounting groove. The rotating shaft of the left end surface of the pushing roller 27 passes through A driven wheel 271 is coaxially fixedly installed behind the side wall of the storage box 21, and a transmission belt 28 is jointly sleeved on the outer wall of the driven wheel 271 and the driving wheel 251. Specifically, a plurality of rubber strips for increasing friction are equidistantly arranged on the outer wall of the push roller 27. The outer diameter of the push roller 27 is tangent to the top surface of the inclined plate 211, and the feed roller 25 is driven to rotate by the motor 26. The driving wheel 251 of the feed roller 25 drives the driven wheel 271 to rotate synchronously through the transmission belt 28, and the push roller 27 rotates accordingly to push the packaging bags installed in the storage box 21 one by one from the bag outlet to the bottom of the feed roller 25, and the feed roller 25 pushes the packaging bags to the placement plate 12.

[0030] Example 2: Please refer to Figure 2 , Figure 5, Figure 6 , a bag feeding structure for a bag-feeding packaging machine that is convenient for conveying packaging bags, which is different from Example 1 in that a gear ring 33 is coaxially fixedly installed on the outer wall of a rotating disk 32, a mounting arm 311 is integrally formed on the outer wall of a fixing seat 31, a pinion 34 is rotatably connected to the end of the mounting arm 311, a rotating shaft of the pinion 34 passes through the mounting arm 311 and is coaxially connected to a second motor 35, the pinion 34 is meshingly connected with the gear ring 33 for transmission, specifically, the second motor 35 drives the pinion 34 to rotate, the pinion 34 indirectly drives the rotating disk 32 to rotate through meshing transmission with the gear ring 33, and the two groups of adsorption components 4 on the rotating disk 32 follow the rotation to exchange up and down positions.

[0031] Two groups of connecting plates 321 are symmetrically installed on the front end of the rotating disk 32, and each group of connecting plates 321 includes two connecting plates 321 installed symmetrically on the left and right. The two groups of adsorption components 4 are movably connected to the two groups of connecting plates 321, respectively. Each group of adsorption components 4 includes a suction cup bracket 41, and a vacuum suction cup 42 is installed at the center of the top surface of the suction cup bracket 41. Specifically, the vacuum suction cup 42 is made of silicone elastic material. When the vacuum suction cup 42 contacts the surface of the packaging bag in the placement plate 12, the suction cup is sucked by a vacuum pump or other suction device. The air in the suction cup is extracted so that the air pressure inside the suction cup is lower than the external atmospheric pressure. According to the principles of physics, the atmospheric pressure will press the packaging bag tightly against the suction cup, thereby realizing the adsorption function. Two connecting rods 43 are hinged on the left and right end surfaces of the suction cup bracket 41. The ends of the four connecting rods 43 away from the suction cup bracket 41 are respectively hinged on the end surfaces of the two connecting plates 321. Specifically, the two connecting plates 321 and the left and right ends of the suction cup bracket 41 are provided with convex columns for being hinged to the connecting rods 43, and the convex columns are provided with limit plates for preventing the connecting rods 43 from falling off.

[0032] A telescopic cylinder 36 is fixedly installed at the center of the front end surface of the rotating disk 32, and the telescopic end of the telescopic cylinder 36 is fixedly connected to a moving plate 37. Linkage rods 38 are hinged at the upper and lower ends of the moving plate 37. The two linkage rods 38 are respectively slidably connected to the connecting rods 43 of the two groups of adsorption components 4. Specifically, sliding cylinders are provided at the left and right ends of the linkage rod 38, and the two sliding cylinders are respectively slidably connected to the outer walls of the two connecting rods 43. The moving plate 37 is driven to move by the telescopic cylinder 36, and the moving plate 37 controls the two groups of suction cup brackets 41 to move toward or away from each other through the two linkage rods 38. At the same time, the design of the single-sided double connecting rod 43 can make the end face of the suction cup bracket 41 always keep level with the placement plate 12, so as to prevent the suction cup bracket 41 from driving the vacuum suction cup 42 to flip during the movement of the adsorption component 4, thereby affecting the adsorption effect.

[0033] Working principle: The staff rotates the twisting plate to drive the threaded rod 24 to rotate in the threaded sleeve 213, and adjusts the distance between the bottom end of the movable baffle 23 and the surface of the inclined plate 211 according to the thickness of the single-layer packaging bag in the storage box 21. The box cover 22 is opened by the handle 221, and several packaging bags are placed in the storage box 21. Closing the box cover 22 can prevent debris from falling into the storage box 21.

[0034] Since the inclined plate 211 and the bottom surface of the material storage box 21 are at a certain inclination angle, the inclination angle can make the packaging bag slide toward the bag outlet by itself under the action of gravity, and the motor 26 is started, and the motor 26 drives the feeding roller 25 to rotate, and the driving wheel 251 of the feeding roller 25 drives the driven wheel 271 to rotate synchronously through the transmission belt 28, and the pushing roller 27 rotates accordingly to push the packaging bags installed in the material storage box 21 out of the bag outlet one by one to the bottom of the feeding roller 25, and the feeding roller 25 pushes the packaging bags to the placement plate 12;

[0035] The telescopic cylinder 36 is started to drive the moving plate 37 to move backward. The moving plate 37 controls the two groups of suction cup brackets 41 to move in opposite directions through the two linkage rods 38. At this time, the suction cup bracket 41 located below drives the suction cup bracket 41 and the vacuum suction cup 42 to move downward. When the vacuum suction cup 42 contacts the packaging bag in the placement plate 12, the exhaust device is started to extract the air inside the suction cup, so that the air pressure inside the suction cup is lower than the external atmospheric pressure. The atmospheric pressure will press the packaging bag tightly on the suction cup to complete the adsorption. At this time, the telescopic cylinder 36 is started to drive the moving plate 37 to move forward. The moving plate 37 controls the two groups of suction cup brackets 41 to move toward each other through the two linkage rods 38. At this time, the vacuum suction cup 42 drives the packaging bag to move upward;

[0036] Start the motor 2 35, the motor 2 35 drives the pinion 34 to rotate, the pinion 34 indirectly drives the rotating disk 32 to rotate through the meshing transmission with the gear ring 33, the two groups of adsorption components 4 on the rotating disk 32 follow the rotation to exchange the upper and lower positions, the adsorption component 4 adsorbed with the packaging bag rotates to the upper side, and the exhaust device is closed when the packaging bag is sent to the next processing step, and this cycle is repeated; at this point, the device is completed.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed in the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A bag feeding structure for a bag feeding packaging machine for conveniently conveying packaging bags, comprising a mounting bracket (1), characterized in that: A mounting plate (11) is provided at the rear end of the mounting bracket (1), a bag outlet assembly (2) is fixedly mounted on the top surface of the mounting plate (11), the bag outlet assembly (2) comprises a material storage box (21), a placement plate (12) is provided at the front end of the mounting bracket (1), a connecting frame (13) is provided directly above the placement plate (12), a rotating assembly (3) is fixedly mounted inside the connecting frame (13), the rotating assembly (3) comprises a fixed seat (31), a rotating disk (32) is rotatably connected at the center of the front end surface of the fixed seat (31), and two groups of adsorption assemblies (4) for adsorbing packaging bags are symmetrically and movably connected to the front end surface of the rotating disk (32) in an upper and lower manner.

2. The bag feeding structure for a bag feeding type packaging machine for conveniently conveying packaging bags according to claim 1, characterized in that: A box cover (22) is connected to one side of the top surface of the material storage box (21), and an inclined plate (211) is provided at the bottom of the material storage box (21) extending from the inside to the outside to facilitate subsequent bag taking operations. A bag outlet is provided at the front end surface of the material storage box (21) at the inclined plate (211).

3. The bag feeding structure for a bag feeding type packaging machine for conveniently conveying packaging bags according to claim 2, characterized in that: The front end surface of the material storage box (21) is provided with two sliding hole sleeves (212) just above the bag outlet, a movable baffle (23) is slidably connected inside the sliding hole sleeve (212), a connecting tube (232) is provided at the center of the top surface of the movable baffle (23), a threaded rod (24) is rotatably connected inside the connecting tube (232), a threaded sleeve (213) is fixedly mounted on the front end surface of the material storage box (21), and the threaded sleeve (213) is threadedly connected to the threaded rod (24).

4. The bag feeding structure for a bag feeding type packaging machine for conveniently conveying packaging bags according to claim 3, characterized in that: The storage box (21) is integrally formed with two extension arms (214) on both left and right sides of the bag outlet, a feeding roller (25) is rotatably connected between the two extension arms (214), a rotating shaft at the right end of the feeding roller (25) passes through the extension arm (214) and is coaxially connected to a motor 1 (26), and a rotating shaft at the left end of the feeding roller (25) passes through the extension arm (214) and is coaxially fixedly mounted with a driving wheel (251).

5. The bag feeding structure for a bag feeding type packaging machine for conveniently conveying packaging bags according to claim 4, characterized in that: A mounting groove is provided on the top surface of the inclined plate (211) located in the material storage box (21), and a push roller (27) is rotatably connected in the mounting groove. A driven wheel (271) is coaxially fixedly installed on the left end surface of the push roller (27) after the rotating shaft passes through the side wall of the material storage box (21). A transmission belt (28) is jointly sleeved on the outer wall of the driven wheel (271) and the driving wheel (251).

6. The bag feeding structure for a bag feeding type packaging machine for conveniently conveying packaging bags according to claim 1, characterized in that: A gear ring (33) is coaxially fixedly mounted on the outer wall of the rotating disk (32); a mounting arm (311) is integrally formed on the outer wall of the fixing seat (31); a pinion gear (34) is rotatably connected to the end of the mounting arm (311); a rotating shaft of the pinion gear (34) passes through the mounting arm (311) and is coaxially connected to a second motor (35); and the pinion gear (34) is meshed and transmission-connected with the gear ring (33).

7. The bag feeding structure for a bag feeding type packaging machine for conveniently conveying packaging bags according to claim 6, characterized in that: Two groups of connecting plates (321) are symmetrically mounted on the front end surface of the rotating disk (32), each group of connecting plates (321) comprises two connecting plates (321) symmetrically mounted on the left and right sides, the two groups of adsorption components (4) are movably connected to the two groups of connecting plates (321), each group of adsorption components (4) comprises a suction cup bracket (41), a vacuum suction cup (42) is mounted at the center of the top surface of the suction cup bracket (41), two connecting rods (43) are hinged on both left and right end surfaces of the suction cup bracket (41), and the ends of the four connecting rods (43) away from the suction cup bracket (41) are hinged to the end surfaces of the two connecting plates (321) respectively.

8. The bag feeding structure for a bag feeding type packaging machine for conveniently conveying packaging bags according to claim 7, characterized in that: A telescopic cylinder (36) is fixedly installed at the center of the front end surface of the rotating disk (32); the telescopic end of the telescopic cylinder (36) is fixedly connected to a moving plate (37); the moving plate (37) is hinged with linkage rods (38) at both upper and lower ends; the two linkage rods (38) are respectively slidably connected to the connecting rods (43) of the two groups of adsorption components (4).

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