Automatic secondary bagging device and working method thereof

Abstract

The invention discloses an automatic secondary bagging device and a working method thereof. The device comprises a supporting frame, on which a feeding conveyor belt, a bag pushing mechanism, a bag supporting mechanism, a bag holding mechanism, a sealing machine, a finished product conveyor belt, a bag taking mechanism, a bag opening mechanism, a bag supply mechanism and a storage conveyor belt are arranged; the bag pushing mechanism is arranged above the feeding conveyor belt, the bag supporting mechanism is connected with the rear end of the feeding conveyor belt, the bag holding mechanism is arranged closely following the bag holding mechanism, the sealing machine is arranged closely following the bag holding mechanism, the finished product conveyor belt is arranged closely following the sealing machine, the storage conveyor belt is arranged closely following the finished product conveyor belt, and the bag supply mechanism is arranged on the upper side of the storage conveyor belt; the invention realizes full automation of secondary packaging, the arrangement of upper and lower bag holding arms of the bag holding mechanism and the propulsion structure enable bag holding and bagging heat sealing to be carried out synchronously, can achieve complete connection with the packaging speed of the rice brick packaging line, uninterrupted feeding and uninterrupted bagging, thereby reducing manual labor intensity and improving production efficiency.

Description

Technical Field

[0001] The invention relates to an automatic secondary bagging device and a working method thereof. Background Art

[0002] At present, in order to extend the shelf life of granular materials such as rice and grains and facilitate transportation, these materials are packed into bricks in the form of vacuum plastic packaging, and then the bricks are packed into plastic bags with buckles for sealing. Nowadays, the secondary bagging is done manually, and vacuum packaging is done by fully automatic high-speed packaging machines. In order to meet the vacuum packaging bagging speed, a large amount of manpower must be used at the finished product outlet of the vacuum packaging machine. The labor intensity is high and the production efficiency is low. Summary of the invention

[0003] The purpose of the present invention is to provide an automatic secondary bagging device and a working method thereof, so as to realize the demand of automated production.

[0004] In order to achieve the above object, the technical solution of the present invention is:

[0005] An automatic secondary bagging device comprises a supporting frame, on which a feed conveyor belt, a bag pushing mechanism, a bag holding mechanism, a bag supporting mechanism, a sealing machine, a finished product conveyor belt, a bag taking mechanism, a bag opening mechanism, a bag supply mechanism and a storage conveyor belt are arranged, wherein the bag pushing mechanism is arranged above the feed conveyor belt, the bag holding mechanism is connected with the rear end of the feed conveyor belt, the bag supporting mechanism is arranged closely following the bag holding mechanism, the sealing machine is arranged closely following the bag supporting mechanism, the finished product conveyor belt is arranged closely following the sealing machine, the storage conveyor belt is arranged closely following the finished product conveyor belt, and the bag supply mechanism is arranged on the upper side of the storage conveyor belt;

[0006] in:

[0007] The bag-supporting mechanism comprises a turntable perpendicular to the feeding conveyor belt, the turntable is controlled by a turntable to rotate 180 degrees, two groups of bag-supporting arms are symmetrically arranged on the upper and lower surfaces of the turntable, the opening and retraction of the two arms of the bag-supporting arms are controlled by the opening mechanism, and a rice brick passage is arranged between the two arms of each group of bag-supporting arms of the turntable;

[0008] The bag holding mechanism includes a bag holding platform and an elevator, the elevator lowers the bag holding platform to be flush with the feeding conveyor belt to receive the rice bricks, and lifts the bag holding platform to be flush with the rice brick passage opening at the lower end of the turntable;

[0009] The bag pushing mechanism is provided with a horizontally movable pushing arm, the front end of which corresponds to the rice brick passing opening at the lower end of the turntable;

[0010] The bag supply mechanism comprises a packaging bag storage platform and a bag opening tray extending from the storage platform, wherein the packaging bag storage platform is arranged vertically above the storage conveyor belt, and the bag opening tray extends vertically above the sealing machine;

[0011] The bag taking mechanism is arranged on the upper side of the bag opening tray, and is provided with a bag taking arm which moves horizontally, and the bag taking arm takes out the packaging bag from the packaging bag storage platform and moves it to the bag opening tray through a suction cup;

[0012] The bag opening mechanism is arranged between the belt taking mechanism and the bag supporting mechanism, and is used for opening the bag mouth of the packaging bag on the bag opening tray by placing the belt taking mechanism and moving it into the bag supporting arm of the bag supporting mechanism.

[0013] A further solution is that guide grooves are respectively arranged on the inner sides of the two supporting arms that are opposite to each other, and the guide grooves are used to push the rice bricks into the packaging bag along the guide grooves.

[0014] A further solution is that the bag taking arm of the bag taking mechanism and the pushing arm of the bag pushing mechanism are controlled to move horizontally by a rodless cylinder.

[0015] The scheme is further as follows: the bag opening mechanism includes a slide rail fixed on the supporting frame, a slider is arranged on the slide rail, two rotating arms which rotate in an arc up and down are arranged on the slider, and bag opening suction cups are arranged on the two rotating arms respectively.

[0016] The scheme is further as follows: the opening mechanism of the bag-supporting mechanism includes a bag-supporting rod, one end of which is hinged to the middle part of the support arm, the tail end of the support arm is connected to the turntable through a rotating shaft at the rice brick passing port of the turntable, the bag-supporting rod is connected to a telescopic arm of a cylinder, and the telescopic arm pushes the support arm through the bag-supporting rod to make a fan-shaped motion with the rotating shaft of the turntable at the rice brick passing port as the center, thereby realizing the expansion and closing of the two support arms.

[0017] The scheme is further as follows: guide rods are respectively arranged on the upper and lower sides of the bag-supporting rod perpendicular to the turntable, the two guide rods clamp the bag-supporting rod to form a support guide groove of the bag-supporting rod, the telescopic arm of the cylinder is in contact with the middle part of the bag-supporting rod, and a tension spring is arranged between the front end of the guide rod and the support arm. The tension spring is used to pull the two support arms to unfold the two support arms when the telescopic arm of the cylinder retracts; the telescopic arm pushes the support arm through the bag-supporting rod and the tension spring to make a fan-shaped motion with the rotating shaft of the turntable at the rice brick passage as the center, thereby realizing the unfolding and closing of the two support arms.

[0018] A working method based on the aforementioned automatic secondary bagging device, the rice bricks are fed onto the feed conveyor belt, the bag taking arm of the bag taking mechanism continuously takes out the packaging bags from the packaging bag storage platform at intervals and then moves forward to place them on the bag opening tray, and the bag opening of the packaging bag is placed between the upper and lower bag opening suction cups of the bag opening mechanism, the bag opening mechanism opens the bag opening and then moves forward to put the packaging bag onto a group of bag holding arms on the upper end side of the turntable, the bag holding arms open the bag opening through the opening mechanism, the turntable rotates 180 degrees to transfer the opened packaging bag from the upper end of the turntable to the lower end side of the turntable, the bag holding mechanism lifts the rice bricks sent from the feed conveyor belt and placed on the bag holding platform to the rice brick passing port at the lower end of the turntable, the pushing arm of the bag pushing mechanism moves forward to push the rice bricks through the rice brick passing port into the packaging bag, and the pushing arm moves forward all the time The packaging bag is pushed to separate from the bag-supporting arm, and the rice brick together with the packaging bag is pushed onto the finished product conveyor belt to place the packaging bag opening at the sealing machine. The push arm retreats, and after the sealing machine heat-seals the packaging bag opening, the finished product conveyor belt sends the packaging bag containing the rice bricks into the warehouse conveyor belt and sends it out. It is characterized in that the action of putting the packaging bag into a group of bag-supporting arms on the upper end side of the turntable and the action of pushing the push arm forward to place the packaging bag opening at the sealing machine are performed synchronously. When the push arm retreats, the turntable rotates 180 degrees to transfer the expanded packaging bag from the upper end of the turntable to the lower end side of the turntable. When the push arm returns to its original position, the bag supporting mechanism lifts the next rice brick to the rice brick passage at the lower end of the turntable, and then the push arm pushes forward to place the packaging bag opening at the sealing machine.

[0019] The scheme is further as follows: after the rice brick is pushed out from the bag supporting platform of the bag supporting mechanism, the bag supporting mechanism lowers the bag supporting platform to be flush with the feeding conveyor belt and then starts the feeding conveyor belt to feed the next rice brick into the bag supporting platform.

[0020] A further solution is that the bag taking arm of the bag taking mechanism and the pushing arm of the bag pushing mechanism are controlled to move horizontally by a rodless cylinder.

[0021] The scheme is further as follows: the bag opening mechanism includes a slide rail fixed on the supporting frame, a slider is arranged on the slide rail, two rotating arms which rotate up and down in an arc relative to each other are arranged on the slider, and bag opening suction cups are arranged on the two rotating arms respectively.

[0022] The beneficial effects of the present invention are: full automation of secondary packaging is achieved, the setting of the upper and lower bag-supporting arms of the bag-supporting mechanism and the propulsion structure enable the bag-supporting and bag-covering heat-sealing to be carried out synchronously, and there will be no phenomenon of waiting for feeding on the feeding conveyor belt. It can be fully connected with the packaging speed of the rice brick packaging line, with uninterrupted feeding and uninterrupted packaging, which reduces the intensity of manual labor and improves production efficiency.

[0023] The present invention is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is a schematic diagram of the structure of a secondary bagging device of the present invention;

[0025] Figure 2 It is a perspective schematic diagram of the secondary bagging device without a front baffle structure of the present invention;

[0026] Figure 3 It is a longitudinal structural schematic diagram of the secondary bagging device of the present invention, Figure 2 A top view of

[0027] Figure 4 It is a schematic axial view of the overall structure of the secondary bagging device of the present invention;

[0028] Figure 5 It is an axial side schematic diagram of the overall structure of the secondary bagging device of the present invention without the front baffle structure;

[0029] Figure 6 It is a schematic diagram of the bag-supporting mechanism structure of the secondary bagging device of the present invention;

[0030] Figure 7 It is a schematic diagram of the bag opening mechanism structure of the secondary bagging device of the present invention;

[0031] Figure 8 This is another angle view of the bag opening mechanism. Figure 7 Left view of . DETAILED DESCRIPTION

[0032] Embodiment 1:

[0033] An automatic secondary bagging device, Figure 1 The block diagram of the device structure is illustrated, the automatic secondary bagging device includes a supporting frame 1, on which a feed conveyor belt 2, a bag pushing mechanism 3, a bag holding mechanism 4, a bag holding mechanism 5, a sealing machine 6, a finished product conveyor belt 7, a bag taking mechanism 8, a bag opening mechanism 9, a bag supply mechanism 10 and a storage conveyor belt 11 are arranged, the feed conveyor belt 2 is arranged at the front end side of the supporting frame 1, and the front end of the feed conveyor belt is connected with the rice brick packaging line or the conveyor belt, wherein the bag pushing mechanism 3 is arranged above the feed conveyor belt 2, the bag holding mechanism 4 is connected with the rear end of the feed conveyor belt 2, the bag holding mechanism 5 is arranged closely following the bag holding mechanism 4, the sealing machine 6 is arranged closely following the bag holding mechanism 5, the finished product conveyor belt 7 is arranged closely following the sealing machine 6, the storage conveyor belt 11 is arranged closely following the finished product conveyor belt 7, and the bag supply mechanism 10 is arranged on the upper side of the storage conveyor belt;

[0034] In the embodiment: the feed conveyor belt 2 includes a multi-stage conveyor, the shaft ends of the front main roller and the front return roller of the front stage conveyor of the multi-stage conveyor are respectively mounted on the front side beam and the rear side beam of the support frame 1, and an annular front conveyor belt is installed between the front main roller and the front return roller. The shaft ends of the rear main roller and the rear return roller of the rear stage conveyor of the multi-stage conveyor are respectively mounted on the front side beam and the rear side beam, and an annular rear conveyor belt is installed between the rear main roller and the rear return roller. In addition, the front main roller and the rear main roller can be provided with a driving source such as a servo motor to complete the movement of the vacuum plastic packaged rice bricks to the bag supporting mechanism 4.

[0035] in:

[0036] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the bag-supporting mechanism includes a turntable 501 perpendicular to the feeding conveyor belt. The center of the turntable 501 is fixed on the rotating shaft of the rotating motor 502. The turntable can rotate 180 degrees under the control of the turntable 502. Two groups of bag-supporting arms 503 are symmetrically arranged on the upper and lower surfaces of the turntable. The opening and retraction of the two bag-supporting arms are controlled by the opening mechanism. Figure 6 As shown, the turntable is provided with a rice brick passage 504 between the two supporting arms 503-1 of each group of bag supporting arms. There are many schemes for realizing the opening and recovery of the two supporting arms. In this embodiment, for the sake of simple structure and convenient control, Figure 6 As shown, the opening mechanism of the bag-holding mechanism includes a bag-holding rod 505, one end of which is hinged to the middle part of the support arm 503-1, and the tail end of the support arm 503-1 is connected to the turntable through the rotating shaft 506 at the rice brick passage of the turntable, and the bag-holding rod 505 is connected to a telescopic arm 507 of a cylinder extending from the back of the turntable. The telescopic arm 507 pushes the support arm through the bag-holding rod 505 to make a fan-shaped motion with the rotating shaft of the turntable at the rice brick passage as the center, thereby realizing the expansion and closing of the two support arms 503-1. The telescopic arm of the cylinder is connected with the middle of the bag support rod, and guide rods 508 are respectively arranged on the upper and lower sides of the bag support rod 505 perpendicular to the turntable. The two guide rods 508 clamp the bag support rod 505 to form a support guide groove of the bag support rod 505. A tension spring 509 is arranged between the front end of the guide rod 508 and the support arm 503-1. The tension spring 509 is used to pull the two support arms 503-1 to expand the two support arms 503-1 when the telescopic arm 507 of the cylinder retracts; the telescopic arm 507 pushes the support arm to make a fan-shaped movement with the rotating shaft of the turntable at the rice brick passing port as the center through the bag support rod 505 and the tension spring 509, so as to realize the expansion and closing of the two support arms 503-1. Guide grooves 503-2 are respectively arranged on the opposite inner sides of the two support arms 503-1. The guide grooves 503-2 are used to push the rice bricks into the packaging bag along the guide grooves, and also have the function of strengthening the strength of the support arms 503-1.

[0037] The bag holding mechanism 4 is as follows Figure 2 As shown, it includes a bag holding platform 401 and an elevator 402, the lifting rod of the elevator 402 is connected to the bag holding platform 401, and the bag holding platform 401 is lowered to be flush with the feeding conveyor belt 2 to receive the rice bricks by controlling the elevator, and the bag holding platform 401 is lifted to be flush with the rice brick passing port 504 at the lower end of the turntable;

[0038] The package pushing mechanism 3 is as follows Figure 2 As shown, a push arm 301 for horizontal movement is provided, the front end of the push arm 301 corresponds to the brick passage opening 504 at the lower end of the turntable, and the push arm 301 is controlled to move horizontally by a rodless cylinder, and of course, can also be controlled to move horizontally by a linear motor;

[0039] The bag supply mechanism 10 is as follows Figure 2 As shown, it includes a packaging bag storage platform 1001 and a bag opening tray 1002 extending from the storage platform, the packaging bag storage platform 1001 is arranged vertically above the storage conveyor belt 11, and the bag opening tray 502 extends vertically above the sealing machine 6;

[0040] The bag taking mechanism 8 is supported and fixed on a side plate 101 on one side of the support frame 1, and is located on the upper side of the bag opening tray 1002. The bag taking mechanism is provided with a horizontally movable bag taking arm 801, which takes out the packaging bag from the packaging bag storage platform and moves it to the bag opening tray 1002 through a suction cup, and the bag taking arm 801 is controlled to move horizontally by a rodless cylinder;

[0041] The bag opening mechanism 9 is supported and fixed on the side plate 102 on the other side of the support frame 1, and is arranged between the belt taking mechanism 8 and the bag holding mechanism 5, and is used to open the bag opening of the bag taking mechanism placed on the bag opening tray 1002 and move it into the bag holding arm 503 of the bag holding mechanism 5. The specific structure is as follows Figure 7 and Figure 8 As shown, the bag opening mechanism 9 includes a slide rail 901 fixed on the side plate 102 on the other side of the supporting frame, a slider 902 is arranged on the slide rail, and two rotating arms that rotate in an arc relative to each other are arranged on the slider 902, namely an upper rotating arm 903 and a lower rotating arm 904. The middle of the upper rotating arm 903 and the lower rotating arm 904 is rotatably fixed on the slider 902 through a rotating shaft 905. The two rotating arms are respectively provided with bag opening suction cups 906. The slider 902 is provided with a The rodless cylinder controls the horizontal movement along the slide rail 901, and the bag opening suction cup 906 is set at one end of the rotating arm. The cylinder telescopic arm 907 is connected to the other end of the rotating arm. The cylinder telescopic arm 907 controls the two rotating arms to rotate up and down in a relative arc. Among them, the lower rotating arm 904 is longer than the upper rotating arm 903, and the extended part of the lower rotating arm 904 is placed on the bag opening tray 1002, which makes it convenient for the bag taking arm 801 of the bag taking mechanism 8 to place the packaging bag mouth between the bag opening suction cups of the two rotating arms.

[0042] The working principle of the automatic secondary bagging device is as follows: the bag taking arm 801 of the bag taking mechanism 8 takes the packaging bag from the packaging bag storage platform 1101 and moves forward to place it on the bag opening tray 1002, and the bag opening of the packaging bag is placed between the upper and lower bag opening suction cups 904 of the bag opening mechanism 9. After the bag opening is opened, the bag opening is moved forward to put the packaging bag into a group of bag holding arms 503 on the upper end side of the turntable 501 of the bag holding mechanism 5. The bag holding arms 503 open the bag opening through the opening mechanism, and the turntable 501 rotates 180 degrees to transfer the opened packaging bag from the upper end of the turntable to the lower end of the turntable. The bag holding mechanism 4 The rice bricks delivered from the feed conveyor belt and placed on the bag supporting platform 401 are lifted to the rice brick passage port 504 at the lower end of the turntable, and the push arm 301 of the bag pushing mechanism 3 moves forward to push the rice bricks through the rice brick passage port 504 into the packaging bag. The push arm is pushed forward all the time to make the packaging bag separate from the bag supporting arm 503, and the rice bricks together with the packaging bag are pushed onto the finished product conveyor belt 7 to place the packaging bag opening at the sealing machine 6, the push arm is withdrawn, and after the sealing machine 6 heat-seals the packaging bag opening, the finished product conveyor belt 7 sends the packaging bag containing the rice bricks to the storage conveyor belt 11, and the storage conveyor belt 11 sends the packaging bag containing the rice bricks out.

[0043] Embodiment 2:

[0044] The present embodiment is a working method of an automatic secondary bagging device based on the embodiment 1, so the content of the embodiment 1 shall be regarded as the content of the present embodiment. From the working principle of the embodiment 1, it is known that the method is that the rice bricks are fed onto the feed conveyor, the bag taking arm of the bag taking mechanism continuously takes out the packaging bag from the packaging bag storage platform at intervals and then moves forward to place it on the bag opening tray, and the bag opening of the packaging bag is placed between the upper and lower bag opening suction cups of the bag opening mechanism, the bag opening mechanism opens the bag opening and then moves forward to put the packaging bag onto a group of bag supporting arms on the upper end side of the turntable, the bag supporting arms open the bag opening through the opening mechanism, the turntable rotates 180 degrees to transfer the opened packaging bag from the upper end of the turntable to the lower end side of the turntable, the bag supporting mechanism lifts the rice bricks sent from the feed conveyor and placed on the bag supporting platform to the rice brick passage at the lower end of the turntable, and the pushing arm of the bag pushing mechanism moves forward to push the rice bricks. The moving rice brick enters the packaging bag through the rice brick passage, the push arm is pushed forward all the time to make the packaging bag separate from the bag-stretching arm, and the rice brick together with the packaging bag is pushed onto the finished product conveyor belt to place the packaging bag opening at the sealing machine, the push arm is retracted, and after the sealing machine heat-seals the packaging bag opening, the finished product conveyor belt sends the packaging bag containing the rice brick into the warehouse conveyor belt and sends it out, wherein, in order to improve efficiency, the action of the packaging bag being put into a group of bag-stretching arms on the upper end side of the turntable and the action of the push arm being pushed forward all the time to place the packaging bag opening at the sealing machine are performed synchronously, when the push arm is retracted, the turntable is rotated 180 degrees to transfer the stretched packaging bag from the upper end of the turntable to the lower end side of the turntable, and when the push arm is retracted to its original position, the bag-supporting mechanism lifts the next rice brick to the rice brick passage at the lower end of the turntable, and then the push arm is pushed forward all the time to place the packaging bag opening at the sealing machine.

[0045] The method further comprises: after the rice brick is pushed out from the bag supporting platform of the bag supporting mechanism, the bag supporting mechanism lowers the bag supporting platform to be flush with the feeding conveyor belt and then starts the feeding conveyor belt to feed the next rice brick into the bag supporting platform.

[0046] Same as Example 1: the bag taking arm of the bag taking mechanism and the pushing arm of the bag pushing mechanism are controlled to move horizontally by a rodless cylinder. The bag opening mechanism includes a slide rail fixed to a support frame, a slider is provided on the slide rail, two rotating arms that rotate in an arc up and down are provided on the slider, and bag opening suction cups are provided on the two rotating arms respectively. The opening mechanism of the bag holding mechanism includes a bag holding rod, one end of the bag holding rod is hinged to the middle of the arm, and the tail end of the arm is connected to the turntable through a rotating shaft at the rice brick passage of the turntable, and the bag holding rod is connected to a telescopic arm of a cylinder, and the telescopic arm pushes the arm through the bag holding rod to make a relative fan-shaped movement with the rotating shaft of the turntable at the rice brick passage as the center, so as to realize the expansion and closing of the two arms.

[0047] The above-mentioned embodiments 1 and 2 realize full automation of secondary packaging. The setting of the upper and lower bag-supporting arms of the bag-supporting mechanism and the propulsion structure enable the bag-supporting and bag-covering heat-sealing to be carried out simultaneously, and there will be no phenomenon of waiting for feeding on the feed conveyor belt. It can be fully connected with the packaging speed of the rice brick packaging line, with uninterrupted feeding and uninterrupted packaging, which reduces the intensity of manual labor and improves production efficiency.

Claims

1. An automatic secondary bagging device, comprising a supporting frame (1), on which are arranged a feeding conveyor belt (2), a bag pushing mechanism (3), a bag supporting mechanism (4), a bag supporting mechanism (5), a sealing machine (6), a finished product conveyor belt (7), a bag taking mechanism (8), a bag opening mechanism (9), a bag supply mechanism (10) and a storage conveyor belt (11), characterized in that: The bag pushing mechanism (3) is arranged above the feed conveyor belt (2), the bag holding mechanism (4) is connected to the rear end of the feed conveyor belt (2), the bag supporting mechanism (5) is arranged closely following the bag holding mechanism (4), the sealing machine (6) is arranged closely following the bag holding mechanism (5), the finished product conveyor belt (7) is arranged closely following the sealing machine (6), the storage conveyor belt (11) is arranged closely following the finished product conveyor belt (7), and the bag supply mechanism (10) is arranged on the upper side of the storage conveyor belt (11), wherein: The bag-supporting mechanism (5) comprises a turntable (501) perpendicular to the feeding conveyor belt, the turntable is controlled by a turntable (502) to rotate 180 degrees, two groups of bag-supporting arms (503) are symmetrically arranged on the turntable surface, the opening and retraction of the two arms (503-1) are controlled by an opening mechanism, and a rice brick passage opening (504) is arranged between the two arms of each group of bag-supporting arms on the turntable; The bag holding mechanism (4) comprises a bag holding platform (401) and an elevator (402), wherein the elevator lowers the bag holding platform to be flush with the feeding conveyor belt to receive the rice bricks, and raises the bag holding platform to be flush with the rice brick passage opening at the lower end of the turntable; The bag pushing mechanism (3) is provided with a horizontally movable pushing arm (301), the front end of which corresponds to the rice brick passing opening (504) at the lower end of the turntable; The bag supply mechanism (10) comprises a packaging bag storage platform (1001) and a bag opening tray (1002) extending from the storage platform, the packaging bag storage platform is arranged vertically above the storage conveyor belt, and the bag opening tray extends vertically above the sealing machine; The bag taking mechanism (8) is arranged on the upper side of the bag opening tray (1002), and is provided with a horizontally movable bag taking arm (801), which takes the packaging bag from the packaging bag storage platform and moves it to the bag opening tray via a suction cup; The bag opening mechanism (9) is arranged between the belt taking mechanism (8) and the bag holding mechanism (5), and is used to open the mouth of the packaging bag on which the belt taking mechanism is placed on the bag opening tray and move the opening into the bag holding arm of the bag holding mechanism.

2. The automatic secondary bagging device according to claim 1, characterized in that: The two supporting arms (503-1) are respectively provided with guide grooves (503-2) on the opposite inner sides thereof, and the guide grooves are used for pushing the rice bricks into the packaging bag along the guide grooves.

3. The automatic secondary bagging device according to claim 2, characterized in that: The bag taking arm (801) of the bag taking mechanism (8) and the pushing arm (301) of the bag pushing mechanism (3) are controlled to move horizontally by a rodless cylinder.

4. The automatic secondary bagging device according to claim 3, characterized in that: The bag opening mechanism (9) comprises a slide rail (901) fixed to a support frame, the slide rail being provided with a slider (902), the slider being provided with two rotating arms that rotate up and down in an arc relative to each other, and the two rotating arms being provided with bag opening suction cups (906) respectively relative to each other.

5. The automatic secondary bagging device according to claim 4, characterized in that: The opening mechanism of the bag-holding mechanism (5) comprises a bag-holding rod (505), one end of which is hinged to the middle of a support arm (503-1), the rear end of which is connected to the turntable at a rice brick passage opening of the turntable via a rotating shaft (506), the bag-holding rod (505) being connected to a telescopic arm (507) of a cylinder, the telescopic arm (507) pushing the support arm (503-1) through the bag-holding rod (505) to make a fan-shaped movement around the rotating shaft (506) at the rice brick passage opening of the turntable, thereby realizing the expansion and closing of the two support arms (503-1).

6. The automatic secondary bagging device according to claim 5, characterized in that: Guide rods (508) are respectively arranged on the upper and lower sides of the bag-supporting rod (505) perpendicular to the rotating disk. The two guide rods (508) clamp the bag-supporting rod (505) to form a supporting guide groove of the bag-supporting rod (505). The telescopic arm (507) of the cylinder is in contact connection with the middle part of the bag-supporting rod (505). A tension spring (509) is arranged between the front end of the guide rod (508) and the supporting arm (503-1). The tension spring (509) is used to pull the two supporting arms (503-1) to expand the two supporting arms (503-1) when the telescopic arm (507) of the cylinder retracts. The telescopic arm (507) pushes the supporting arm to make a fan-shaped movement with the rotating shaft of the rotating disk at the rice brick passing port as the center through the bag-supporting rod (505) and the tension spring (509), so as to realize the expansion and closing of the two supporting arms (503-1).

7. A working method of the automatic secondary bagging device according to claim 6, wherein the rice bricks are fed onto the feed conveyor belt, the bag taking arm of the bag taking mechanism continuously takes out the packaging bags from the packaging bag storage platform at intervals and then moves forward to place them on the bag opening tray, and the bag opening of the packaging bag is placed between the upper and lower bag opening suction cups of the bag opening mechanism, the bag opening mechanism opens the bag opening and then moves forward to put the packaging bag onto a group of bag holding arms on the upper end side of the turntable, the bag holding arms hold the bag opening open through the opening mechanism, and the turntable rotates 180 degrees to take the opened packaging bag out from the upper end of the turntable Transfer to the lower end side of the turntable, the bag holding mechanism will lift the rice bricks placed on the bag holding platform sent from the feed conveyor belt to the rice brick passing port at the lower end of the turntable, the push arm of the bag pushing mechanism moves forward to push the rice bricks through the rice brick passing port into the packaging bag, the push arm pushes forward all the time to make the packaging bag separate from the bag support arm, and pushes the rice bricks together with the packaging bag onto the finished product conveyor belt to place the packaging bag opening at the sealing machine, the push arm retreats, and after the sealing machine heat-seals the packaging bag opening, the finished product conveyor belt sends the packaging bag containing the rice bricks into the warehouse conveyor belt and sends it out, which is characterized in that The action of putting the packaging bag into a group of bag-stretching arms on the upper end side of the turntable is carried out synchronously with the action of pushing the push arm forward to place the opening of the packaging bag at the sealing machine. When the push arm retreats, the turntable rotates 180 degrees to transfer the stretched packaging bag from the upper end of the turntable to the lower end side of the turntable. When the push arm retreats to its original position, the bag supporting mechanism lifts the next rice brick to the rice brick passage at the lower end of the turntable, and then the push arm pushes forward to place the opening of the packaging bag at the sealing machine.

8. The working method according to claim 7, characterized in that: After the rice brick is pushed out from the bag supporting platform of the bag supporting mechanism, the bag supporting mechanism lowers the bag supporting platform to be flush with the feed conveyor belt and then starts the feed conveyor belt to feed the next rice brick into the bag supporting platform.

9. The working method according to claim 7, characterized in that: The bag taking arm of the bag taking mechanism and the pushing arm of the bag pushing mechanism are controlled to move horizontally by a rodless cylinder.

10. The working method according to claim 7, characterized in that: The bag opening mechanism 9 comprises a slide rail fixed on a supporting frame, a slider is arranged on the slide rail, two rotating arms which rotate in an arc up and down are arranged on the slider, and bag opening suction cups are arranged on the two rotating arms respectively.

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