Double-inlet switching input type bag dropping and guiding device in pillow packaging production

Abstract

The present invention discloses a double-inlet switching input type bag dropping and guiding device in pillow packaging production, which includes a double-inlet parallel switching unit and a follow-up guiding structure arranged between the blanking output port of a pillow packaging machine and the inlet of a weighing tank; the double-inlet parallel switching unit includes N chutes with a spacing of 2L, the upper ends of the chutes are blanking receiving ends, and 2N bag dropping belts with a width slightly less than L and coaxially installed are provided at the outlets at the lower ends of the chutes, the follow-up guiding structure includes 2N guiding grooves, and the outlets of the guiding grooves are aligned with the inlets of the weighing tank; and a baffle and a plurality of linked scraping plates are provided. The present invention realizes the function of absorbing and conveying the output material bags of the pillow packaging machine to the weighing structure when matching the output speed of the pillow packaging machine. Thus, the speed of the upstream equipment is halved and output to the subsequent equipment, reducing the requirements for the structure of the subsequent equipment due to the speed increase of the front-end equipment and improving the operation efficiency of the equipment.

Description

Technical Field

[0001] The present invention relates to a complete mechanism for a pillow packaging machine during connection. When the packaging machine produces a material bag during high-speed operation, the material bag is received by a structure with two parallel inlets during the falling process, and then a bag guiding follow-up structure and a fixed weighing structure are connected behind. Through this mechanism, the speed of the input material in the front is reduced by half, the structural movement requirements for the subsequent equipment are greatly reduced, the equipment operation failure rate is reduced, and the equipment operation efficiency is improved. Background Art

[0002] Currently, enterprise production focuses on improving efficiency. The speed requirement of the pillow packaging machine in enterprise production is also continuously increasing. However, due to the increase in its operating speed, the subsequent weighing system cannot directly meet the speed requirement of the high-speed pillow packaging machine due to structural and time limitations. Therefore, a mechanism is needed to reduce the speed without affecting production efficiency. Summary of the Invention

[0003] In view of the above-mentioned prior art, the present invention provides a mechanism that, when matching the output speed of a pillow packaging machine, absorbs the output material bag of the pillow packaging machine by a two-inlet parallel switching input bag-drop structure, and conveys the material bag to the weighing structure through a follow-up guiding structure. Thus, the front output speed is converted into half of the speed to match the subsequent weighing structure, reducing the requirements for the structure of the subsequent equipment due to the speed increase of the front-end equipment, and improving the equipment operation efficiency.

[0004] To solve the above technical problems, a two-inlet switching input type bag-drop and guiding device in pillow packaging production according to the present invention includes a two-inlet parallel switching unit and a follow-up guiding structure arranged between the material discharge output port of the pillow packaging machine and the weighing tank inlet;

[0005] The double-inlet parallel switching unit includes a support bar and two fixing bars arranged between two side plates; N chutes are provided on the support bar, and the distance between the symmetry lines of the widths of two adjacent chutes 1 is 2L. The upper ends of the N chutes are blanking receiving ends, and at the outlets at the lower ends of the N chutes, 2N bag-drop belts with a width of L1 coaxially installed and a gap of M between adjacent two bag-drop belts are provided, where L1 + M = L. A bag-drop bottom plate that can slide along the fixing bars is provided on the upper surfaces of the two fixing bars, and the front end of the bag-drop bottom plate is located below the outlet of the chute; baffles are respectively provided on the outer sides of the bag-drop belts at both ends and at the gaps between adjacent two bag-drop belts, and the initial ends of the baffles are located at the front end of the bag-drop bottom plate; the driving shaft and the driven shaft of the bag-drop belt are respectively fixed on the bag-drop bottom plate by bearing seats, the driving shaft is driven by a reduction motor, and the axial direction of the driving shaft is consistent with the sliding direction of the bag-drop bottom plate; a reduction motor is installed on the bag-drop bottom plate, a synchronous pulley set driven by a synchronous belt is provided on the outer surface of one side of the bag-drop bottom plate, and the driving shaft is driven by the reduction motor; the input pulley of the synchronous belt pulley is installed on the shaft head of the reduction motor; a translation motor is provided on the side plate on the other side of the bag-drop bottom plate, and the translation motor drives the bag-drop bottom plate to slide along the fixing bars through a slider-link mechanism;

[0006] The follow-up guiding structure includes a connecting block. One end of the connecting block is fixed to the rear end of the bag-drop bottom plate, and a follow-up support plate is provided below the other end of the connecting block. The upper surface of the follow-up support plate is flush with the upper surface of the bag-drop bottom plate. A plurality of follow-up guiding bars are provided on the upper surface of the follow-up support plate. The number of the follow-up guiding bars is the same as the number of the baffles in the double-inlet parallel switching unit. The center of the front end of the follow-up guiding bar is aligned with the center of the baffle. The rear end of the follow-up guiding bar is connected to the two side plates in the double-inlet parallel switching unit through a fixed support plate. The upper surface of the follow-up guiding bar is flush with the upper surface of the follow-up support plate. The front section of the guiding groove is formed between two adjacent baffles, and the rear section of the guiding groove is formed between two adjacent follow-up guiding bars. The outlet of the rear section of the guiding groove is aligned with the inlet of the weighing groove of the subsequent weighing device;

[0007] Below the connection between the end of the baffle and the front end of the follow-up guiding bar, a bag-drop baffle that can move up and down driven by a cylinder is provided. Below the connection between the end of the follow-up guiding bar and the inlet of the weighing groove, a guiding baffle that can move up and down driven by a cylinder is provided; above the outlet of the chute, above the connection between the end of the baffle and the front end of the follow-up guiding bar, and above the connection between the end of the follow-up guiding bar and the inlet of the weighing groove, there are scrapers that can move up and down and reciprocate back and forth, and the scrapers at each place are linked.

[0008] Furthermore, for the double-inlet switching input type bag-drop and guiding device of the present invention, where:

[0009] In the described dual - inlet parallel switching unit, the heights of the two fixed bars are the same, and the position of the supporting bar is higher than that of the two fixed bars; the two fixed bars and the supporting bar are parallel to each other. A slide rail is provided on each of the two fixed bars, and a chute cooperating with the slide rail is provided under the bag - dropping bottom plate. The driving translation motor drives the bag - dropping bottom plate to slide along the track through a slider - link mechanism, so that the 2N bag - dropping belts mounted on the bag - dropping bottom plate perform synchronous axial reciprocating alternating movements, and the distance of each movement is equal to L.

[0010] In the described dual - inlet parallel switching unit, the slider - link mechanism includes a translation block and a driving link. The translation block is mounted on the shaft head of the translation motor. One end of the driving link is connected to the bag - dropping bottom plate, and the other end of the driving link is connected to the translation block. The translation motor is mounted on the side plate through a translation motor base.

[0011] In the described dual - inlet parallel switching unit, a stop - bar mounting strip is installed at the front end of the bag - dropping bottom plate, and the stop bar is mounted on the stop - bar mounting strip. A support plate is provided below the upper layer of the bag - dropping belt. A plurality of support columns are provided below the support plate, and the bottoms of the support columns are located in the gaps between the 2N bag - dropping belts and are fixed on the bag - dropping bottom plate; the end of the stop bar is mounted on the support plate, and a convex platform is provided at the lower end of the stop bar. The width of the convex platform is slightly smaller than the gap M between the bag - dropping belts, and is used to limit the axial position of the bag - dropping belts.

[0012] In the described dual - inlet parallel switching unit, the 2N bag - dropping belts are sequentially numbered 1, 2, 3, 4, 5, ……, up to 2N along the axis from one end to the other end. When the translation motor rotates, it drives the bag - dropping bottom plate, the bag - dropping belts thereon and the stop bar to perform synchronous axial reciprocating movements through the slider - link mechanism.

[0013] In the described follow - up guiding structure, the side walls of the front section and the rear section of the guiding groove and the bag - dropping bottom plate form a complete guiding groove. The number of weighing grooves of the subsequent weighing device is the same as the number of the guiding grooves, and the bottom surface of the weighing groove is flush with the bottom surface of the guiding groove.

[0014] An independent support frame is provided below the weighing groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] By switching the left and right of the feeding port and with the assistance of the follow - up guiding, the residence time of the rear bag to the weighing part is doubled, which can greatly improve the weighing accuracy and the flexibility of the equipment operation, and improve the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is of the present invention Figure 1Axonometric view of the shown bag-drop guiding device;

[0018] Figure 2 is Figure 1 Front view of the shown bag-drop guiding device;

[0019] Figure 3 is Figure 1 Top view of the shown bag-drop guiding device;

[0020] Figure 4 is Figure 3 Partial enlarged view of the follow-up guiding structure shown in ;

[0021] Figure 5 is Figure 1 Right view of the shown bag-drop guiding device;

[0022] Figure 6 is Figure 1 Left sectional view of the shown bag-drop guiding device;

[0023] Figure 7 is Figure 6 Partial enlarged view of the fixed part of the outlet follow-up bar shown in ;

[0024] Figure 8 is Figure 6 Partial enlarged view of the local structure of the double-inlet parallel switching unit shown in ;

[0025] In the figure:

[0026] 1 - Slideway 2 - Support bar 3 - Bag-drop belt 4 - Support plate

[0027] 5 - Support pillar 6 - Driving shaft 7 - Baffle mounting bar 8 - Bag-drop bottom plate

[0028] 9 - Baffle 10 - Slide rail 11 - Fixed bar 12 - Side plate

[0029] 13 - Synchronous pulley set 14 - Reduction motor 15 - Belt motor base 16 - Driving link

[0030] 17 - Translation motor 18 - Translation block 19 - Translation motor base 20 - Connecting block

[0031] 21 - Follow-up support plate 22 - Follow-up guiding bar 23 - Fixed support plate 24 - Inlet follow-up bar

[0032] 25 - Outlet follow-up bar 26 - Sliding bearing 27 - Guide rod 28 - Scraper

[0033] 29 - Guide baffle 30 - Pin shaft 31 - Weighing tank 32 - Support frame

[0034] 33 - Bag-drop baffle Specific Embodiments

[0035] The design concept of a double - inlet switching input type bag - dropping and guiding device in pillow - type packaging production proposed by the present invention is as follows: The material bags produced by the packaging machine during high - speed operation are received by a structure with two inlets arranged side - by - side during the falling process, and then are guided into the subsequent weighing system through a following guiding structure connected at the back. Since a double - row switching bag - dropping structure is adopted, that is, for the material bags output from the upstream, during the process of inputting into the subsequent weighing system, one input action is completed every two bag - droppings, thus reducing the input speed by half, greatly reducing the requirements for the structural actions of the subsequent equipment, while reducing the equipment operation failure rate and improving the equipment operation efficiency.

[0036] The following further illustrates the present invention in conjunction with the accompanying drawings and specific embodiments, but the following embodiments are by no means any limitation to the present invention.

[0037] A double - inlet switching input type bag - dropping and guiding device in pillow - type packaging production proposed by the present invention includes a double - inlet side - by - side switching unit and a following guiding structure arranged between the material - dropping output port of the pillow - type packaging machine and the weighing tank inlet.

[0038] Such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 and Figure 8As shown in the figure, the double-inlet parallel switching unit includes a support bar 2 and two fixing bars 11 disposed between two side plates 12. The heights of the two fixing bars 11 are the same, and the position of the support bar 2 is higher than that of the two fixing bars 11. The two fixing bars 11 and the support bar 2 are parallel to each other. There are N chutes 1 on the support bar 2. The distance between the symmetry lines of the widths of two adjacent chutes 1 is 2L. The upper ends of the N chutes 1 are the blanking receiving ends. At the exits of the lower ends of the N chutes 1, there are 2N bag-drop belts 3 coaxially installed with a width of L1, and the gap between two adjacent bag-drop belts 3 is M, where L1 + M = L and M is less than L1. There is a bag-drop bottom plate 8 on the upper surfaces of the two fixing bars 11 that can slide along the fixing bars 11. That is, there is a slide rail 10 on each of the two fixing bars 11, and a chute that mates with the slide rail 10 is provided on the lower surface of the bag-drop bottom plate 8. Since the installation direction of the slide rail 10 is the same as the direction of the main shaft 6 of the bag-drop belt 3, the stability of the whole set of belts including 2N bag-drop belts 3 during left-right movement is ensured. At the same time, the slide rail 10 is provided on the fixing bar 11, and the fixing bar 11 is sometimes fixed to the two side plates 12. Therefore, the two side plates 12 are the installation reference for the whole structure. The front end of the bag-drop bottom plate 8 is located below the exit of the chute 1. Stop bars 9 are respectively provided at the outer sides of the bag-drop belts 3 at both ends and at the gaps between two adjacent bag-drop belts 3, which can provide left-right support for the falling material bags and also limit the axial (left-right) position of the bag-drop belts 3. A stop bar mounting strip 7 is installed at the front end of the bag-drop bottom plate 8, and the stop bar 9 is installed on the stop bar mounting strip 7. The initial end of the stop bar 9 is located at the front end of the bag-drop bottom plate 8. A support plate 4 is provided below the upper layer of the bag-drop belt 3. There are multiple support columns 5 below the support plate 4. The bottoms of the support columns 5 are located in the gaps between the 2N bag-drop belts 3 and are fixed to the bag-drop bottom plate 8. The multiple support columns 5 support the support plate 4 to ensure the stable operation of the bag-drop belt 3. The end of the stop bar 9 is installed on the support plate 4. A convex platform is provided at the lower end of the stop bar 9, and the width of the convex platform is slightly smaller than the gap M between the bag-drop belts 3, which is used to limit the axial (left-right) position of the bag-drop belts 3. The main shaft 6 and the passive shaft of the bag-drop belt 3 are respectively fixed to the bag-drop bottom plate 8 by bearing seats. The main shaft 6 is driven by a reduction motor 14, and the axial direction of the main shaft 6 is the same as the sliding direction of the bag-drop bottom plate 8. The reduction motor 14 is installed on the bag-drop bottom plate 8. A synchronous pulley set 13 driven by a synchronous belt is provided on the outer surface of one side of the bag-drop bottom plate 8, and the main shaft 6 is driven by the reduction motor 14. The input pulley of the synchronous belt pulley 13 is installed on the shaft head of the reduction motor 14. The reduction motor 14 is the input power for the belt 3 and is installed on the belt motor seat 15. The belt motor seat 15 is vertically fixed below the bag-drop bottom plate 8 and between the two fixing bars 11, and moves along with the bag-drop bottom plate 8 along the slide rail 10 to drive the whole set of belt groups together.On the side plate 12 on the other side of the bag - dropping bottom plate 8, a translation motor 17 is installed through a translation motor base 19. The translation motor 17 drives the bag - dropping bottom plate 8 to slide along the fixed strip 11 through a slider - link mechanism. The slider - link mechanism includes a translation block 18 and a driving link 16. The translation block 18 is installed on the shaft head of the translation motor 17. One end of the driving link 16 is connected to the bag - dropping bottom plate 8, and the other end of the driving link 16 is connected to the translation block 18. The translation motor 17 is installed on the side plate 12 through the translation motor base 19. The driving translation motor 17 drives the bag - dropping bottom plate 8 to slide along the track 10 through the slider - link mechanism, so that 2N bag - dropping belts 3 installed on the bag - dropping bottom plate 8 make synchronous axial reciprocating alternating movements, and the distance of each movement is equal to L.

[0039] As Figures 1 to 8 shown, the follow - up guiding structure includes a connecting block 20. One end of the connecting block 20 is fixed to the rear end of the bag - dropping bottom plate 8. Below the other end of the connecting block 20, there is a follow - up support plate 21. The upper surface of the follow - up support plate 21 is flush with the upper surface of the bag - dropping bottom plate 8. There are a plurality of follow - up guiding strips 22 on the upper surface of the follow - up support plate 21. The number of the follow - up guiding strips 22 is the same as the number of the blocking strips 9 in the double - inlet parallel switching unit. The center of the front end of the follow - up guiding strip 22 is aligned with the center of the blocking strip 9. The rear end of the follow - up guiding strip 22 is connected to the two side plates 12 in the double - inlet parallel switching unit through a fixed support plate 23. The upper surface of the fixed support plate 23 is flush with the upper surface of the follow - up support plate 21. The front section of the guiding groove is formed between two adjacent blocking strips 9, and the rear section of the guiding groove is formed between two adjacent follow - up guiding strips 22. That is, from the inlet of the adjacent blocking strip 9 to the outlet of the follow - up guiding strip 22 and the corresponding bag - dropping bottom plate 8 below together form a guiding groove. The outlet of the rear section of the guiding groove is aligned with the inlet of the weighing groove 31 of the subsequent weighing device. The number of the weighing grooves 31 of the subsequent weighing device is the same as the number of the guiding grooves. An independent support frame 32 is provided below the weighing groove 31. The weighing groove 31 is independently supported by the support frame 32 below to ensure that its weighing result is maximally avoided from being interfered by the outside world.

[0040] As Figure 3 and Figure 4 shown, the follow - up guiding strip 22 includes an inlet follow - up strip 24 and an outlet guiding strip 25 connected together. The inlet follow - up strip 24 and the follow - up support plate 21, and the outlet follow - up strip 25 and the fixed support plate 23 are respectively rotationally connected through a pin shaft 30. As Figure 8As shown in the figure, the follower guide bar 22 is connected between the fixed support plate 23 and the moving support plate 21; the connecting ends of the inlet follower bar 24 and the outlet follower bar 25 are provided with a U-shaped opening, and the bottom of the U-shaped opening has a first round hole. At the connecting ends of the outlet follower bar 25 and the inlet follower bar 24, there is a convex platform that can be matched and slid with the U-shaped opening. The depth of the convex platform is shorter than the depth of the U-shaped opening, and the center of the front end of the convex platform is provided with a second round hole coaxial with the first round hole. Sliding bearings 26 are respectively installed in the first round hole and the second round hole. A guide rod 27 is arranged in the two sliding bearings 26. The guide rod 27 plays a guiding role when the U-shaped opening and the convex platform move relative to each other, and finally forms the telescopic action of the follower guide bar 22, so as to satisfy that when the follower guide bar 22 moves left and right on the bag dropping bottom plate 8, the entire follower guiding structure can smoothly and coherently match the entire action.

[0041] As Figure 4 and Figure 6 shown in the figure, a bag dropping baffle 33 is provided below the connection between the end of the stop bar 9 and the front end of the follower guide bar 22. The bag dropping baffle 33 is connected to a cylinder and moves up and down under the drive of the cylinder. Its function is that the bag dropping belt 3 is always in a rotating state. When the material falls on the bag dropping belt 3 and is transported forward, the bag dropping baffle 33 first blocks the material. After two bag droppings, there are material bags on all the bag dropping belts 3. Then, the bag dropping baffle 33 is lowered according to needs to release the material. A guiding baffle 29 that can move up and down driven by a cylinder is also provided below the connection between the end of the follower guide bar 22 and the inlet of the weighing tank 31.

[0042] As Figure 1 、 Figure 2 、 Figure 5 and Figure 7 shown in the figure, there are scraping plates 28 that can move up and down and reciprocate back and forth above the outlet of the slideway 1, above the connection between the end of the stop bar 9 and the front end of the follower guide bar 22, and above the connection between the end of the follower guide bar 22 and the inlet of the weighing tank 31. The distances between the scraping plates 28 are the same, and the scraping plates 28 at each place are linked. The scraping plates 28 are also the power for the intermittent movement of the material to the next working station. The functions of the guiding baffle 29 and the bag dropping baffle 33 are also to block the material bags that are quickly scraped to the next working station by the scraping plates 28, preventing the material bags from rushing forward to a farther working station due to the inertia of being quickly scraped forward, resulting in confusion.

[0043] In the present invention, the 2N bag-drop belts 3 are numbered 1, 2, 3, 4, 5, ……, up to 2N in sequence along the axial direction from one end to the other end (from left to right in the figure). When the translation motor 17 rotates, the driving link 16 of the slider-link mechanism drives the bag-drop bottom plate 8 to move left and right, and simultaneously drives the bag-drop belts 3 and the retaining bars 9 etc. to swing left and right, and synchronously make axial reciprocating movements. The moving distance is the center distance in the width direction between two adjacent bag-drop belts 3 (i.e., the sum of the width L1 of the bag-drop belt 3 and the gap M between two adjacent bag-drop belts 3). When the N chutes 1 correspond to the bag-drop belts 3 numbered 1, 3, 5, 7 …… 2N-1, the translation motor 17 stops rotating. When the first chute 1 discharges materials for the first time, the material bags enter the corresponding numbered bag-drop belts 3 and are driven forward by the continuously rotating bag-drop belts 3 until they are blocked by the bag-drop baffle 33 in the rising position. Then, the translation motor 17 continues to rotate until the N chutes 1 are aligned with the bag-drop belts 3 numbered 2, 4, 6, 8, …… 2N and stops. When the second chute 1 discharges materials for the second time, the material bags enter the bag-drop belts 3 numbered 2, 4, 6, 8, 10, …… 2N and reach the position of the bag-drop baffle 33. After the two discharges, there are material bags on all the bag-drop belts 3, and then the bag-drop baffle 33 descends, and all the material bags are simultaneously driven forward by the bag-drop belts 3. When the above-mentioned bag-drop baffle 33 descends, the upper scraper 28 also descends simultaneously. After the scraper 28 descends, it drives the material bags in the guide grooves of the bag-drop belts 3 to move forward. The moving distance of the scraper 28 is the distance between two adjacent scrapers. When the previous scraper 28 moves to the original position of the next scraper 28, the material bags are correspondingly scraped to the next working station. At this time, all the scrapers 28 rise and return to their original positions, and at the same time, the bag-drop baffle 33 and the guide baffle 29 rise to block the forward-moving material bags.

[0044] When the material bags are scraped into the weighing tank 31, the weighing system starts to calculate the weight and then feedbacks the weight result.

[0045] Although the present invention has been described above in conjunction with the accompanying drawings, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative rather than restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many deformations without departing from the purpose of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A double - inlet switching input type bag - dropping and guiding device in pillow - type packaging production, characterized in that, it includes a double - inlet parallel switching unit and a follow - up guiding structure arranged between the blanking output port of the pillow - type packaging machine and the inlet of the weighing tank; The double - inlet parallel switching unit includes a supporting bar (2) and two fixing bars (11) arranged between two side plates (12); N sliding channels (1) are arranged on the supporting bar (2), and the distance between the width symmetry lines of two adjacent sliding channels (1) is 2L. The upper ends of the N sliding channels (1) are blanking receiving ends. At the lower - end outlets of the N sliding channels (1), 2N bag - dropping belts (3) with a width of L1 coaxially installed and a gap of M between two adjacent bag - dropping belts (3) are provided, where L1 + M = L. On the upper surfaces of the two fixing bars (11), there is a bag - dropping bottom plate (8) that can slide along the fixing bars (11). The front end of the bag - dropping bottom plate (8) is located below the outlet of the sliding channel (1). At the outer sides of the bag - dropping belts (3) at both ends and at the gaps between two adjacent bag - dropping belts (3), baffle bars (9) are respectively provided, and the initial ends of the baffle bars (9) are located at the front end of the bag - dropping bottom plate (8). The driving shaft (6) and the driven shaft of the bag - dropping belt (3) are respectively fixed on the bag - dropping bottom plate (8) by bearing seats. The driving shaft (6) is driven by a reduction motor (14), and the axial direction of the driving shaft (6) is consistent with the sliding direction of the bag - dropping bottom plate (8). The bag - dropping bottom plate (8) is equipped with a reduction motor (14). On the outer side of one side of the bag - dropping bottom plate (8), there is a synchronous pulley group (13) driven by a synchronous belt, and the driving shaft (6) is driven by the reduction motor (14); the input pulley of the synchronous pulley group (13) is installed on the shaft head of the reduction motor (14). On the side plate on the other side of the bag - dropping bottom plate (8), there is a translation motor (17), and the translation motor (17) drives the bag - dropping bottom plate (8) to slide along the fixing bars (11) through a slider - link mechanism; The follow - up guiding structure includes a connecting block (20). One end of the connecting block (20) is fixed to the rear end of the bag - dropping bottom plate (8). Below the other end of the connecting block (20), there is a follow - up supporting plate (21). The upper surface of the follow - up supporting plate (21) is flush with the upper surface of the bag - dropping bottom plate (8). On the upper surface of the follow - up supporting plate (21), there are a plurality of follow - up guiding bars (22). The number of the follow - up guiding bars (22) is the same as the number of the baffle bars (9) in the double - inlet parallel switching unit. The centers of the front ends of the follow - up guiding bars (22) are aligned with the centers of the baffle bars (9). The rear ends of the follow - up guiding bars (22) are connected to the two side plates (12) in the double - inlet parallel switching unit through a fixed supporting plate (23). The upper surfaces of the follow - up guiding bars (22) are flush with the upper surface of the follow - up supporting plate (21). The front section of the guiding groove is formed between two adjacent baffle bars (9), and the rear section of the guiding groove is formed between two adjacent follow - up guiding bars (22). The outlet of the rear section of the guiding groove is aligned with the inlet of the weighing tank (31) of the subsequent weighing device; Below the junction of the end of the baffle strip (9) and the front end of the follower guide strip (22), there is a bag-dropping baffle (33) that can move up and down driven by a cylinder. Below the junctions of the end of the follower guide strip (22) and the entrances of the weighing troughs (31), there are respectively guide baffles (29) that can move up and down driven by cylinders. Above the exit of the slideway (1), above the junction of the end of the baffle strip (9) and the front end of the follower guide strip (22), and above the junction of the end of the follower guide strip (22) and the entrance of the weighing trough (31), there are scrapers that can move up and down and reciprocate back and forth, and the scrapers at each location are linked.

2. The dual-inlet switching input type bag-dropping and guiding device according to claim 1, characterized in that in the dual-inlet parallel switching unit, the heights of the two fixed strips (11) are the same, and the position of the support strip (2) is higher than the positions of the two fixed strips (11); the two fixed strips (11) and the support strip (2) are parallel to each other. Each of the two fixed strips (11) is provided with a slide rail (10). Below the bag-dropping bottom plate (8), there is a chute that cooperates with the slide rail (10). The driving translation motor (17) drives the bag-dropping bottom plate (8) to slide along the slide rail (10) through a slider-link mechanism, so that the 2N bag-dropping belts (3) installed on the bag-dropping bottom plate (8) perform synchronous axial reciprocating alternating movements, and the moving distance of each is equal to L.

3. The dual-inlet switching input type bag-dropping and guiding device according to claim 2, characterized in that in the dual-inlet parallel switching unit, the slider-link mechanism includes a translation block (18) and a driving link (16). The translation block (18) is installed on the shaft head of the translation motor (17). One end of the driving link (16) is connected to the bag-dropping bottom plate (8), and the other end of the driving link (16) is connected to the translation block (18). The translation motor (17) is installed on the side plate (12) through a translation motor seat (19).

4. The dual-inlet switching input type bag-dropping and guiding device according to claim 1, characterized in that in the dual-inlet parallel switching unit, a baffle strip mounting strip (7) is installed at the front end of the bag-dropping bottom plate (8), and the baffle strip (9) is installed on the baffle strip mounting strip (7). Below the upper layer of the bag-dropping belt (3), there is a support plate (4). Below the support plate (4), there are multiple support columns (5). The bottoms of the support columns (5) are located in the gaps between the 2N bag-dropping belts (3) and are fixed on the bag-dropping bottom plate (8); the end of the baffle strip (9) is installed on the support plate (4), and a boss is provided at the lower end of the baffle strip (9). The width of the boss is slightly smaller than the gap M between the bag-dropping belts (3) for restricting the axial position of the bag-dropping belts (3).

5. The dual-inlet switching input type bag-dropping and guiding device according to claim 1, characterized in that In the described double-inlet parallel switching unit, the 2N bag-drop belts (3) are sequentially numbered 1, 2, 3, 4, 5, ……, up to N from one end to the other end along the axial direction. When the translation motor (17) rotates, the bag-drop bottom plate (8) and the bag-drop belts (3) and the retaining bars (9) thereon are driven by the slider-link mechanism to make synchronous reciprocating movements in the axial direction.

6. The double-inlet switching input type bag-drop and guiding device according to claim 1, characterized in that, the side walls of the front section and the side walls of the rear section of the guiding groove and the bag-drop bottom plate (8) form a complete guiding groove, and the number of weighing grooves (31) of the subsequent weighing device is the same as the number of the guiding grooves, and the bottom surface of the weighing groove (31) is flush with the bottom surface of the guiding groove.

7. The double-inlet switching input type bag-drop and guiding device according to claim 6, characterized in that, an independent support frame (32) is provided below the weighing groove (31).

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