Bag feeding equipment for packaging machine

Abstract

The utility model discloses bag conveying equipment for a packaging machine, the bag conveying equipment comprises a first bag conveying device, a bag arranging device and a second bag conveying device, the first bag conveying device comprises a first rack and a first conveying belt, the bag arranging device comprises a second rack and a suspension bracket, and the second bag conveying device comprises a bag conveying assembly and a suction cup assembly; one end of the hanging frame is connected to the second rack in a swinging mode, the other end of the hanging frame is arranged at an angle in the horizontal direction of the first conveying belt and is spaced from the first conveying belt, the hanging frame is provided with a rotating second conveying belt, and through the arrangement, stacked bag bodies can be conveyed to a second bag conveying device in order; and the suction cup assembly is configured to be controlled by the bag feeding assembly to swing, so that the bag feeding and suction working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the bag feeding technology field of packaging machinery, and more particularly to a bag feeding device for a packaging machine. BACKGROUND

[0002] In the packaging technology, the forming of a packaging bag generally needs to orderly process the to-be-formed packaging bag through packaging procedures such as bag feeding, filling, and sealing.

[0003] However, in the packaging bag conveying device, the packaging bags are placed on the conveying belt of the conveyor by manual operation, and it is inevitable that the packaging bags cannot be placed on the conveying belt according to the specified number of packaging bags, so that the conveyor has a packaging bag stacking situation with different numbers of packaging bags on the conveying belt, which is not conducive to the subsequent packaging processing procedure.

[0004] Therefore, it is urgent to provide a bag feeding device for a packaging machine, which can improve the height of the bag stacking in conveying and orderly transmit the stacked bags to the subsequent packaging processing procedure. CONTENT OF THE INVENTION

[0005] Based on this, the bag feeding device for a packaging machine provided by the present application can improve the height of the bag stacking in conveying and orderly transmit the stacked bags to the subsequent packaging processing procedure.

[0006] The bag feeding device for a packaging machine provided by the present application comprises:

[0007] A first bag feeding device comprises a first rack and a first conveying belt, and the first conveying belt is rotationally arranged on the first rack;

[0008] A bag arranging device comprises a second rack and a suspension frame, the second rack is installed on the first rack, one end of the suspension frame is swingably connected to the second rack, and the other end is arranged at an angle along the horizontal direction of the first conveying belt and is spaced apart from the first conveying belt; and the suspension frame is provided with a rotationally arranged second conveying belt;

[0009] A second bag feeding device comprises a bag feeding assembly and a suction disc assembly, and the bag feeding assembly and the suction disc assembly are swingably arranged on one side of the first rack; the bag feeding assembly is provided with a rotating rotating wheel, and the suction disc assembly is configured to make a swing action under the control of the bag feeding assembly, so that the suction disc assembly has a pressing action and sucks the bag body conveyed by the rotating wheel when the rotating wheel conveys the bag body;

[0010] The first bag conveying device, the bag arranging device, the bag conveying assembly and the suction cup assembly are sequentially installed on the first rack along a bag body conveying direction; the second rack and the first rack jointly define a swing space for swinging of the hanging frame, and the second conveying belt is swingingly arranged in the swing space and conveys the bag body to the second bag conveying device via the second conveying belt during conveying of the bag body by the first conveying belt.

[0011] In one of the embodiments, the hanging frame is configured as a concave shape, and the swing space is arranged in the concave shape.

[0012] In one of the embodiments, the first bag conveying device further comprises:

[0013] A first motor is fixedly installed on the first rack;

[0014] A first driving wheel is rotatably arranged on the first rack and is in transmission connection with the first motor;

[0015] A first driven wheel is rotatably arranged on the first rack and is in transmission connection with the first driving wheel;

[0016] One end of the first conveying belt is connected with the first driving wheel, and the other end is connected with the first driven wheel, and the first conveying belt is used for supporting and conveying the bag body to be conveyed.

[0017] In one of the embodiments, the first driving wheel is 4, the first driven wheel is 4, and the first conveying belt is 4; each 2 of the first conveying belts are defined as being arranged at intervals along the first rack and forming a first conveying group; each of the first conveying groups is configured to be arranged at intervals along the first rack and used for supporting and conveying the bag body to be conveyed.

[0018] In one of the embodiments, the first bag conveying device is further provided with a spacing adjusting assembly, and the spacing adjusting assembly comprises:

[0019] A first adjusting handle is rotatably inserted into the first rack;

[0020] A bidirectional screw is rotatably installed on the first rack and is connected with the first adjusting handle; the outer surface of the bidirectional screw is configured as a left-hand thread segment and a right-hand thread segment, the left-hand thread segment is arranged on the outer peripheral surface of one end of the bidirectional screw, and the right-hand thread segment is arranged on the outer peripheral surface of the other end of the bidirectional screw;

[0021] A deviation correcting shaft is arranged at intervals with the bidirectional screw on the rack;

[0022] A first coupling member is configured with a first through hole and a first threaded hole for the left-handed threaded segment of the bidirectional screw rod, the first through hole is in sliding fit with the correction shaft, and the first threaded hole is in fit with the left-handed threaded segment;

[0023] A second coupling member is configured with a second through hole and a second threaded hole for the right-handed threaded segment of the bidirectional screw rod, the second through hole is in sliding fit with the correction shaft, and the first threaded hole is in fit with the right-handed threaded segment;

[0024] A first baffle is arranged on one side of the first rack;

[0025] A second baffle is arranged on the other side of the first rack;

[0026] The first coupling member and the second coupling member are arranged at intervals, the first coupling member is fixedly connected with the first baffle, and the second coupling member is fixedly connected with the second baffle.

[0027] In one embodiment, the bag arranging device further comprises:

[0028] A second motor is fixedly installed on the second rack;

[0029] A second driving wheel is rotatably arranged on the second rack and in transmission connection with the second motor;

[0030] A second driven wheel is rotatably arranged on the suspension rack and in transmission connection with the second driving wheel;

[0031] One end of the second conveying belt is connected with the second driving wheel, and the other end is connected with the second driven wheel, the second conveying belt is configured to roll against the surface of the bag body, so that the bag body in conveying is transmitted to the second bag conveying device according to the preset number.

[0032] In one embodiment, the second driving wheel is 4, the second driven wheel is 4, and the second conveying belt is 4; every two of the conveying belts are arranged at intervals along the second rack and form a second conveying group;

[0033] Each of the second conveying groups is arranged at intervals along the first rack and used for supporting and conveying the bag body to be conveyed.

[0034] In one embodiment, the suspension rack further comprises:

[0035] A guide plate has a mounting portion and a guide portion; the mounting portion is adjustably mounted on the second rack, the guide portion is arranged at an angle along the horizontal direction of the first conveying belt, and the second conveying belt is mounted on the guide portion.

[0036] In one of the embodiments, the angle is set to 25°-65°.

[0037] In one of the embodiments, the mounting portion and the guiding portion are designed integrally.

[0038] In one of the embodiments, the guiding portion is set to be inclined along the horizontal direction of the first conveying belt and is fixedly connected with the hanging rack, or the guiding portion is set to be angled along the conveying direction of the bag.

[0039] In one of the embodiments, the bag arranging device is provided with a position adjusting assembly, which comprises:

[0040] a second adjusting handle, which is rotatably inserted into the second rack;

[0041] a slide rod, which is fixedly installed on both sides of the first rack;

[0042] a slide block, which is arranged on both sides of the second rack and is in sliding cooperation with the slide rod;

[0043] The second adjusting handle is configured to abut against the slide rod to lock the position of the second rack on the slide rod.

[0044] In one of the embodiments, the slide block has a plurality of, at least two of which are installed on one side of the second rack and at least two of which are installed on the other side of the second rack.

[0045] In one of the embodiments, the bag conveying assembly comprises:

[0046] a third motor, which is installed on the first rack;

[0047] a rotating rod, which is swingably arranged on the first rack, the rotating rod is in transmission connection with the third motor, and the rotating wheel is sleeved on the rotating rod; and

[0048] The suction disc assembly comprises:

[0049] a connecting rod, which is swingably arranged on the first rack;

[0050] a suction disc, which is fixedly connected with the connecting rod, the suction disc is configured to suck the bag conveyed by the rotating wheel.

[0051] In one of the embodiments, the second bag conveying device is further provided with a linkage assembly, which comprises:

[0052] a first movable plate, one end of which is connected with the connecting rod and the other end of which is rotatably connected with the first rack;

[0053] a second movable plate, one end of which is rotationally connected to the rotating rod, and the other end of which is rotationally connected to the first frame;

[0054] a driving rod, which is rotationally connected to the first movable plate, and is configured to reciprocally push the first movable plate so as to make the first movable plate swing;

[0055] a tension spring, which is connected to the first frame or the second movable plate;

[0056] wherein the first movable plate and the second movable plate have a common connecting fulcrum on the first frame, and the first movable plate and the second movable plate are connected to the first frame through the connecting fulcrum;

[0057] the first movable plate is provided with a first abutting portion, and the second movable plate is provided with a second abutting portion, the first abutting portion and the second abutting portion abut each other to make the second movable plate swing under the control of the first movable plate.

[0058] In one of the embodiments, the linkage assembly further comprises:

[0059] a cam, which is rotationally arranged on the first frame;

[0060] an oscillating arm, which is sequentially provided with a first connecting portion, a roller portion and a second connecting portion; the first connecting portion is rotationally connected to the driving rod; the second connecting portion is rotationally connected to the first frame; and the roller portion is arranged on one side of the oscillating arm close to the cam;

[0061] wherein the roller portion cooperates with the cam to drive the driving rod to reciprocally rise and fall.

[0062] In one of the embodiments, the bag feeding device for the packaging machine is further provided with a first sensing assembly and a second sensing assembly;

[0063] the first sensing assembly comprises:

[0064] a first photoelectric sensor, which is fixedly connected to the second frame;

[0065] a sensing member, which is fixedly arranged on the suspension frame and oppositely arranged with the first photoelectric sensor;

[0066] the sensing member swings under the control of the suspension frame to control the rotation state of the second conveying belt;

[0067] the second sensing assembly comprises:

[0068] a second photoelectric sensor, which is arranged on one side of the first frame along the bag conveying direction;

[0069] a vertical plate fixed to one side of the first rack;

[0070] The second photoelectric sensor is installed on the vertical plate, and is used for sensing the bags conveyed by the second conveying belt and driving the bag conveying assembly and the suction cup assembly to convey and suck the bags.

[0071] In one embodiment, the first photoelectric sensor and the second photoelectric sensor are respectively electrically connected with a PLC controller.

[0072] The utility model discloses beneficial effects:

[0073] In the embodiment of the application, the first bag conveying device includes a first rack and a first conveying belt, the bag arranging device includes a second rack and a hanging frame, the second bag conveying device includes a bag conveying assembly and a suction cup assembly, one end of the hanging frame is swingably connected to the second rack, the other end is arranged at an angle along the horizontal direction of the first conveying belt and is spaced apart from the first conveying belt, and the hanging frame is provided with a rotating second conveying belt. BRIEF DESCRIPTION OF DRAWINGS

[0074] Figure 1 It is a three-dimensional structure schematic view of the bag conveying equipment in one embodiment of the application;

[0075] Figure 2 It is a structure schematic view of the interval adjusting assembly in one embodiment of the application;

[0076] Figure 3 It is a structure schematic view of the first coupling and the second coupling in one embodiment of the application;

[0077] Figure 4 It is a structure schematic view of the position adjusting assembly in one embodiment of the application;

[0078] Figure 5 It is a structure schematic view of the second bag conveying device in one embodiment of the application.

[0079] BRIEF DESCRIPTION OF DRAWINGS:

[0080] 1, the first bag conveying device; 11, the first rack; 12, the first conveying belt; 13, the first motor; 14, the first driving wheel; 15, the first driven wheel;

[0081] 2, bag arranging device; 21, second frame; 22, hanging frame; 221, second conveying belt; 222, guide plate; 22A, mounting portion; 22B, guide portion; 23, second motor; 24, second driving wheel; 25, second driven wheel;

[0082] 3, second bag conveying device; 31, bag conveying assembly; 311, rotating wheel; 312, third motor; 313, rotating rod; 32, suction cup assembly; 321, connecting rod; 322, suction cup; 33, linkage assembly; 331, first movable plate; 33A, first abutting portion; 332, second movable plate; 33B, second abutting portion; 333, driving rod; 334, tension spring; 335, cam; 336, swing arm; 33C, first connecting portion; 33D, roller portion; 33E, second connecting portion;

[0083] A, spacing adjusting assembly; A1, first adjusting handle; A2, bidirectional screw rod; A3, deviation rectifying shaft; A4, first coupling; A41, first through hole; A42, first threaded hole; A5, second coupling; A51, second through hole; A52, second threaded hole; A6, first baffle; A7, second baffle;

[0084] B, adjusting assembly; B1, second adjusting handle; B2, sliding rod; B3, sliding block;

[0085] C, first sensing assembly; C1, first photoelectric sensor; C2, sensing piece;

[0086] D, second sensing assembly; D1, second photoelectric sensor; D2, vertical plate. DETAILED DESCRIPTION

[0087] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described and it is therefore contemplated to cover all such modifications as fall within the scope of the application. It is to be understood that the application is not limited in its application to the details set forth in the following description or exemplified examples and that the application is capable of other embodiments and of being practiced or carried out in various ways.

[0088] The present application is described in detail below with reference to the accompanying drawings:

[0089] The present application discloses a bag conveying device for a packaging machine.

[0090] In the present application, please refer to Figure 1 The bag conveying device for a packaging machine comprises a first bag conveying device 1, a bag arranging device 2 and a second bag conveying device 3.

[0091] The first bag conveying device 1 comprises a first frame 11 and a first conveying belt 12, and the first conveying belt 12 is rotatably arranged on the first frame 11.

[0092] Specifically, the first bag conveying device 1 is used for conveying bags. The first bag conveying device 1 comprises a first frame 11 and a first conveying belt 12, and the first conveying belt 12 is rotatably arranged on the first frame 11. By arranging the rotatable first conveying belt 12, the bags to be conveyed can be conveyed to the bag arranging device 2.

[0093] It can be understood that the rotating speed of the first conveying belt 12 is controlled by a motor, which is a prior art and will not be discussed in detail here.

[0094] For example, the first conveying belt 12 is rotatably arranged on the first frame 11 along the bag conveying direction.

[0095] Please continue to refer to Figure 1 The bag arranging device 2 comprises a second frame 21 and a hanging frame 22, the second frame 21 is installed on the first frame 11, one end of the hanging frame 22 is swingably connected to the second frame 21, and the other end is arranged at an angle with the first conveying belt 12 along the horizontal direction of the first conveying belt 12. The hanging frame 22 is provided with a rotatable second conveying belt 221.

[0096] The bag arranging device 2 is used for conveying the stacked bags on the first conveying belt 12 to the second bag conveying device 3. The second frame 21 is used for supporting and installing the hanging frame 22. The hanging frame 22 is used for installing the rotatable second conveying belt 221. The second conveying belt 221 is used for conveying the stacked bags to the second bag conveying device 3 by rolling abutting.

[0097] Specifically, the second rack 21 is mounted on the first rack 11, and the hanger 22 is swingably connected to the second rack 21 at one end. Through the arrangement, during the conveying of the bag body by the first conveying belt 12, the swing of the hanger 22 along the conveying direction of the bag body is utilized, thereby improving the deviation of the position of the bag body caused by the abutment of the bag body on the second conveying belt 221 due to the driving force of the first conveying belt 12, and facilitating the orderly entry of the bag body into the second bag conveying device 3 according to the preset position.

[0098] It can be understood that the preset position refers to the position of the bag body arranged on the first conveying belt 12, which can be set according to production requirements. The interval between the hanger 22 and the first conveying belt 12 can be set according to the thickness of the packaging bag. It can be understood that if the gap is set to be the thickness of a single bag, the bag is directly conveyed to the second bag conveying device 3 through the gap.

[0099] Please refer to Figure 1 , the hanger 22 is swingably connected to the second rack 21 at one end, and the other end is arranged at an angle with the first conveying belt 12 in the horizontal direction of the first conveying belt 12, that is, the other end of the hanger 22 can be inclined in the horizontal direction of the first conveying belt 12. The hanger 22 is provided with a rotating second conveying belt 221, which cooperates with the hanger 22 to make the second conveying belt 221 rollingly abut the upper surface of the stacked bag body on the first conveying belt 12, thereby orderly conveying the stacked bag body to the second bag conveying device 3 station.

[0100] It can be understood that the first conveying belt 12 is usually manually placed or laid with packaging bags, so that during the conveying process of the first conveying belt 12, there will be multiple columns of bags with different numbers or overlaps. Therefore, through the rolling abutment of the second conveying belt 221 on the upper surface of each column of bags in sequence and order, the bag body above is conveyed to the second bag conveying device 3 station, thereby reducing the stacking height of the bag body.

[0101] Please refer to Figure 1 , the second bag conveying device 3 comprises a bag conveying assembly 31 and a suction cup assembly 32, and the bag conveying assembly 31 and the suction cup assembly 32 are swingably arranged on one side of the first rack 11, respectively. The bag conveying assembly 31 is provided with a rotating rotating wheel 311, and the suction cup assembly 32 is configured to be controlled by the bag conveying assembly 31 to swing, so that when the rotating wheel 311 conveys the bag body, the suction cup assembly 32 has a pressing action and sucks the bag body conveyed by the rotating wheel 311.

[0102] Please refer to Figure 1 , the bag conveying assembly 31 is used to receive the bag body conveyed by the bag arranging device 2 and convey a single bag body to the suction cup assembly 32, and the suction cup assembly 32 is used to receive and suck the single bag body conveyed by the bag conveying assembly 31.

[0103] Specifically, the bag feeding assembly 31 and the suction cup assembly 32 are arranged on the side of the first rack 11 at the first rack 11 conveying terminal of the bag body, and swingably connected with the first rack 11. The suction cup assembly 32 is controlled by the bag feeding assembly 31 to make a swing action. Through the cooperation of the bag feeding assembly 31 and the suction cup assembly 32, the swing amplitudes of the bag feeding assembly 31 and the suction cup assembly 32 are consistent, and the bag feeding efficiency of the bag feeding assembly 31 and the bag suction efficiency of the suction cup assembly 32 are improved.

[0104] Please continue to refer to Figure 1 The bag feeding assembly 31 is provided with a rotating rotating wheel 311, which is used to roll against the surface of a single bag body and convey the single bag body to the working position of the suction cup assembly 32. Through this arrangement, the suction cup assembly 32 can suck a single bag body, and the number of stacked bag bodies in the working position of the suction cup assembly 32 is reduced.

[0105] Exemplarily, the connection mode of the bag feeding assembly 31 and the suction cup assembly 32 can be fixed connection, clamping connection or threaded connection, as long as the bag feeding assembly 31 and the suction cup assembly 32 can make a swing action with consistent amplitude. Herein, no limitation is made.

[0106] Exemplarily, the swing action of the bag feeding assembly 31 and the suction cup assembly 32 is fan-shaped swing.

[0107] Please continue to refer to Figure 1 The first bag feeding device 1, the bag arranging device 2, the bag feeding assembly 31 and the suction cup assembly 32 are sequentially arranged on the first rack 11 along the conveying direction of the bag body. The second rack 21 and the first rack 11 jointly define a swing space for the swing of the hanging rack 22. During the conveying of the bag body by the first conveying belt 12, the second conveying belt 221 is swingably arranged in the swing space, and the bag body is conveyed to the second bag feeding device 3 through the second conveying belt 221.

[0108] Specifically, the first bag feeding device 1, the bag arranging device 2, the bag feeding assembly 31 and the suction cup assembly 32 are sequentially arranged on the first rack 11 along the conveying direction of the bag body. In this way, the bag body of the present application is sequentially fed through the processes of once conveying, arranging, twice conveying and sucking, and the rationality of the structure arrangement of the present application is improved.

[0109] It can be understood that arranging refers to sequentially and orderly rolling against the upper surfaces of the bag bodies by the second conveying belt 221, so that the bag bodies above are transferred to the working position of the second bag feeding device 3. Once conveying refers to the process of conveying the bag body by the first conveying belt 12, and twice conveying refers to the process of conveying the bag body by the bag feeding assembly 31.

[0110] In operation, the bag body of the packaging bag is manually placed on the first conveying belt 12 of the first rack 11, and the first conveying belt 12 rotates to send the bag body to the relative position of the second conveying belt 221. For the stacked bag body, the second conveying belt 221 of the hanging rack 22 rolls against the upper surface of each stacked bag body in sequence, and the hanging rack 22 swings along the same conveying direction of the bag body to make a circular arc trajectory. When the second conveying belt 221 conveys the bag body to the second bag conveying device 3, the bag conveying assembly 31 and the suction disc assembly 32 act in conjunction. The bag conveying assembly 31 transmits a single bag body to the suction disc assembly 32, and the suction disc assembly 32 receives and sucks the single bag body transmitted by the bag conveying assembly 31. For the sucked bag body, the bag conveying assembly 31 and the suction disc assembly 32 swing to the next work position, so that the bag body is sequentially conveyed through the process of one-time conveying, bag arranging, two-time conveying, and bag sucking.

[0111] Exemplarily, the hanging rack 22 is configured as a concave shape, and the swing space is arranged in the concave shape.

[0112] In some embodiments, referring to Figures 1 to 2 in conjunction, the first bag conveying device 1 further comprises a first motor 13, a first driving wheel 14, and a first driven wheel 15. The first motor 13 is fixedly installed on the first rack 11. The first driving wheel 14 is rotatably arranged on the first rack 11 and is in transmission connection with the first motor 13. The first driven wheel 15 is rotatably arranged on the first rack 11 and is in transmission connection with the first driving wheel 14. One end of the first conveying belt 12 is connected with the first driving wheel 14, and the other end is connected with the first driven wheel 15. The first conveying belt 12 is used to support and convey the bag body to be conveyed.

[0113] Specifically, the first motor 13 is fixedly installed on the first rack 11. The first driving wheel 14 is rotatably installed on one side of the first rack 11 along the starting position of the bag conveying. The first driven wheel 15 is rotatably installed on the other side of the first rack 11 along the ending position of the bag conveying. One end of the first conveying belt 12 is connected with the first driving wheel 14, and the other end is connected with the first driven wheel 15. Through the above arrangement, the bag body can be conveyed along the first conveying belt 12 to the bag arranging device 2.

[0114] Exemplarily, the starting position of the bag conveying and the ending position of the bag conveying are respectively at the opposite ends of the first rack 11.

[0115] Exemplarily, the first driving wheel 14 can be four, the first driven wheel 15 can be four, and the first conveying belt 12 can be four. Each two first conveying belts 12 are arranged at intervals along the first rack 11 to form a first conveying group. Each first conveying group is configured to be arranged at intervals along the first rack 11 to support and convey the bag body to be conveyed.

[0116] Exemplarily, the first driving wheel 14 can be 1, the first driven wheel 15 can be 1, the first conveying belt 12 can be 1, and the conveying bag body can be placed on the single first conveying belt 12 for conveying.

[0117] Exemplarily, the first driving wheel 14 can be 2, the first driven wheel 15 can be 2, the first conveying belt 12 can be 2, and the conveying bag body can be placed on the two first conveying belts 12 for conveying.

[0118] In some embodiments, referring to Figures 1 to 3 in combination, the first bag conveying device 1 further comprises a spacing adjustment assembly A, which comprises a first adjustment handle A1, a bidirectional screw rod A2, a deviation correction shaft A3, a first coupling A4, a second coupling A5, a first baffle A6, and a second baffle A7. The first adjustment handle A1 is rotatably inserted into the first rack 11. The bidirectional screw rod A2 is rotatably installed on the first rack 11 and connected with the first adjustment handle A1. The outer surface of the bidirectional screw rod A2 is configured with a left-hand thread section and a right-hand thread section (not shown in the figure). The left-hand thread section is arranged on the outer peripheral surface of one end of the bidirectional screw rod A2, and the right-hand thread section is arranged on the outer peripheral surface of the other end of the bidirectional screw rod A2.

[0119] The deviation correction shaft A3 is arranged in the rack and spaced apart from the bidirectional screw rod A2. The first coupling A4 is configured with a first through hole A41 and a first threaded hole A42 for matching the left-hand thread section of the bidirectional screw rod A2. The first through hole A41 is in sliding fit with the deviation correction shaft A3, and the first threaded hole A42 is in thread connection fit with the left-hand thread section. The second coupling A5 is configured with a second through hole A51 and a second threaded hole A52 for matching the right-hand thread section of the bidirectional screw rod A2. The second through hole A51 is in sliding fit with the deviation correction shaft A3, and the first threaded hole A42 is in thread connection fit with the right-hand thread section.

[0120] The first baffle A6 is arranged on one side of the first rack 11, and the second baffle A7 is arranged on the other side of the first rack 11. The first coupling A4 and the second coupling A5 are arranged in a spaced apart manner. The first coupling A4 is fixedly connected with the first baffle A6, and the second coupling A5 is fixedly connected with the second baffle A7.

[0121] The spacing adjustment assembly A is used for bidirectional synchronous adjustment of the relative positions of the first baffle A6 and the second baffle A7 on the first rack 11 (bidirectional synchronous means that the first baffle A6 and the second baffle A7 are both close to or away from each other along the axial direction of the deviation correction shaft A3, which is a direction perpendicular to the conveying direction of the bag body on the first rack 11), and limits the position of the bag body on the first conveying belt 12, thereby playing a role in correcting the deviation of the bag body during transmission.

[0122] In operation, by rotating the first adjusting handle A1, the bidirectional screw rod A2 rotates, the left-hand thread segment of the bidirectional screw rod A2 rotates in cooperation with the first coupling A4, the right-hand thread segment of the bidirectional screw rod A2 rotates in cooperation with the second coupling A5, the first coupling A4 and the second coupling A5 are both in sliding cooperation with the deviation correction shaft A3, the deviation correction shaft A3 is used for guiding, so that the first baffle A6 and the second baffle A7 are close to or away from each other relative to the axial direction of the deviation correction shaft A3, thereby adjusting the relative position of the first baffle A6 and the second baffle A7 on the first rack 11. During the conveying of the bag body on the first rack 11, the first baffle A6 and the second baffle A7 can be used to correct the deviation of the bag body conveyed on the first rack 11.

[0123] In some embodiments, referring to Figures 1 to 4 in combination, the bag arranging device 2 further comprises a second motor 23, a second driving wheel 24 and a second driven wheel 25. The second motor 23 is fixedly installed on the second rack 21, the second driving wheel 24 is rotatably arranged on the second rack 21 and is in driving connection with the second motor 23. The second driven wheel 25 is rotatably arranged on the suspension rack 22 and is in driving connection with the second driving wheel 24. One end of the second conveying belt 221 is connected with the second driving wheel 24 and the other end is connected with the second driven wheel 25. The second conveying belt 221 is configured to roll against the surface of the bag body, so as to transmit the bag body conveyed in a preset number to the second bag conveying device 3.

[0124] Specifically, the second motor 23 is fixedly installed on the second rack 21, the second driving wheel 24 is rotatably arranged on the second rack 21, and the second driven wheel 25 is rotatably arranged on the suspension rack 22. The second driving wheel 24 and the second driven wheel 25 are both in driving connection with the second rack 21, so as to rotate the second conveying belt 221. The second conveying belt 221 rolls against the surface of the bag body, so as to transmit the bag body conveyed in a preset number to the second bag conveying device 3. By this arrangement, the second bag conveying device 3 receives the bag body conveyed by the second conveying belt 221, which reduces the stacked bag bodies entering the second bag conveying device 3, and is conducive to the suction cup assembly 32 sucking and swinging the single bag body to the subsequent process.

[0125] For example, the preset number can be 1, 2 or more bag bodies.

[0126] The subsequent process can be further conveying, opening the bag opening or filling the material or sealing process of the bag body transmitted by the suction cup assembly 32, which does not belong to the application content of the present application and will not be discussed in detail here.

[0127] Exemplarily, the second driving wheel 24 is 4, the second driven wheel 25 is 4, and the second conveying belt 221 is 4, defining that every two conveying belts are arranged at intervals along the second rack 21 and form a second conveying group, and each second conveying group is arranged at intervals along the first rack 11 and used for supporting and conveying the bag body to be conveyed.

[0128] In some embodiments, referring to Figures 1 to 4 in combination, the hanger 22 further comprises a guide plate 222 having a mounting portion 22A and a guide portion 22B, the mounting portion 22A is adjustably mounted to the second rack 21, and the guide portion 22B is arranged at an angle along the horizontal direction of the first conveying belt 12, and the second conveying belt 221 is mounted to the guide portion 22B.

[0129] Specifically, the guide plate 222 has a mounting portion 22A and a guide portion 22B, the mounting portion 22A is used for connecting the hanger 22 and the second rack 21, and the guide portion 22B is used for arranging the hanger 22 at an angle along the horizontal direction of the first conveying belt 12, through which the second conveying belt 221 can be arranged obliquely to the first conveying belt 12, avoiding the second conveying belt 221 from colliding with the first conveying belt 12 when swinging, which not only facilitates the swinging action of the second conveying belt 221, but also reduces the failure rate of the present application, making the structure more reasonable.

[0130] Exemplarily, the angle is set to 25°-65°.

[0131] Exemplarily, the mounting portion 22A and the guide portion 22B are designed integrally.

[0132] Exemplarily, the guide portion 22B is arranged obliquely along the horizontal direction of the first conveying belt 12 and is fixedly connected with the hanger 22, or the guide portion 22B is arranged at an angle along the bag conveying direction.

[0133] Exemplarily, the adjustably mounting can be the adjustment cooperation of the bolt and the screw hole, through adjusting the relative position of the mounting portion 22A relative to the second rack 21, so that the gap size between the second conveying belt 221 and the first conveying belt 12 is adjusted.

[0134] In some embodiments, referring to Figures 1 to 4 in combination, the bag arranging device 2 is provided with a position adjusting assembly B, the position adjusting assembly B comprises a second adjusting handle B1, a slide rod B2 and a slide block B3, the second adjusting handle B1 is rotatably inserted into the second rack 21, the slide rod B2 is fixedly installed on both sides of the first rack 11, and the slide block B3 is arranged on both sides of the second rack 21 and is in sliding cooperation with the slide rod B2, and the second adjusting handle B1 is configured to abut against the slide rod B2 to lock the position of the second rack 21 on the slide rod B2.

[0135] Specifically, the slide rods B2 are fixedly installed on the two sides of the first rack 11, the sliding blocks B3 are fixedly connected to the two sides of the second rack 21, and the second rack 21 is slidably matched with the sliding blocks B3 to realize the adjustment of the position of the second rack 21 on the first rack 11. The second adjusting handle B1 is rotatably inserted into the second rack 21 and abuts against the slide rod B2 to lock the position of the second rack 21 on the slide rod B2. Through the above arrangement, the position of the second rack 21 on the first rack 11 can be adjusted in real time according to the size of the bag body, which is beneficial to conveying the bag body to the second bag conveying device 3.

[0136] Exemplarily, the sliding blocks B3 are provided in plurality, at least two sliding blocks B3 are installed on one side of the second rack 21, and at least two sliding blocks B3 are installed on the other side of the second rack 21.

[0137] In some embodiments, referring to Figures 1 to 5 in combination, the bag conveying assembly 31 comprises a third motor 312 and a rotating rod 313. The third motor 312 is installed on the first rack 11, the rotating rod 313 is swingably arranged on the first rack 11, the rotating rod 313 is in transmission connection with the third motor 312, and the rotating wheel 311 is sleeved on the rotating rod 313.

[0138] Specifically, the rotating rod 313 is swingably arranged on the first rack 11, the rotating rod 313 is in transmission connection with the third motor 312, and the rotating rod 313 is provided with the rotating wheel 311. In this way, the third motor 312 is driven to rotate the rotating wheel 311, the rotating wheel 311 is configured to receive the bag body conveyed by the second conveying belt 221 and transmit the single bag body to the suction cup assembly 32. Through the above arrangement, the situation that the bag bodies are accumulated at the working position of the suction cup assembly 32 is improved.

[0139] In some embodiments, referring to Figures 1 to 5 in combination, the suction cup assembly 32 comprises a connecting rod 321 and a suction cup 322. The connecting rod 321 is swingably arranged on the first rack 11, and the suction cup 322 is fixedly connected to the connecting rod 321. The suction cup 322 is configured to suck the bag body conveyed by the rotating wheel 311.

[0140] Specifically, the connecting rod 321 is swingably arranged on the first rack 11, and the suction cup 322 is arranged on one side of the connecting rod 321. Through the above arrangement, the suction cup 322 is configured to suck the single bag body conveyed by the rotating wheel 311 and swing the single bag body to the subsequent working position, thereby improving the structural rationality of the present application.

[0141] Exemplarily, the rotating wheel 311 and the suction cup 322 can have a height difference relative to the first conveying belt 12. The rotating wheel 311 is configured to preferentially convey the single bag body to the working position of the suction cup 322, and then the suction cup 322 sucks the single bag body. Through the above arrangement, the working efficiency is improved.

[0142] Exemplarily, the suction cup assembly 32 can be connected to a vacuum generator so that the suction cup 322 can suck the bag body.

[0143] In some embodiments, referring to Figures 1 to 5 In combination, the second bag conveying device 3 is further provided with a linkage assembly 33, which comprises a first movable plate 331, a second movable plate 332, a driving rod 333, and a tension spring 334. One end of the first movable plate 331 is connected to the connecting rod 321, and the other end is rotationally connected to the first rack 11. One end of the second movable plate 332 is rotationally connected to the rotating rod 313, and the other end is rotationally connected to the first rack 11. The driving rod 333 is rotationally connected to the first movable plate 331, and is configured to reciprocally push the first movable plate 331 so that the first movable plate 331 performs a swinging action. The tension spring 334 is connected to the first rack 11 or the second movable plate 332. The first movable plate 331 and the second movable plate 332 have a common connecting fulcrum on the first rack 11, and are both connected to the first rack 11 through the connecting fulcrum.

[0144] The first movable plate 331 is provided with a first abutting portion 33A, and the second movable plate 332 is provided with a second abutting portion 33B. The first abutting portion 33A and the second abutting portion 33B abut each other to control the second movable plate 332 to perform a swinging action under the control of the first movable plate 331.

[0145] Specifically, the first movable plate 331 and the second movable plate 332 have a common connecting fulcrum on the first rack 11. The first movable plate 331 is provided with a first abutting portion 33A, and the second movable plate 332 is provided with a second abutting portion 33B. The driving rod 333 is configured to reciprocally push the first movable plate 331 to drive the first abutting portion 33A to abut the second abutting portion 33B, so that the first movable plate 331 and the second movable plate 332 perform a synchronous swinging action along the connecting fulcrum. The tension spring 334 is used to limit the swinging amplitude of the first movable plate 331 and the second movable plate. Through this arrangement, the connecting rod 321 and the rotating rod 313 achieve a synchronous swinging action, which is beneficial to improving work efficiency.

[0146] Exemplarily, the first movable plate 331 and the second movable plate 332 of the linkage assembly 33 are fixedly connected. When one of the first movable plate 331 or the second movable plate 332 is pushed by the driving rod 333, the other one of the first movable plate 331 or the second movable plate 332 performs a synchronous swinging action.

[0147] Exemplarily, the first movable plate 331 and the second movable plate 332 of the linkage assembly 33 are snap-fitted. When one of the first movable plate 331 or the second movable plate 332 is pushed by the driving rod 333, the other one of the first movable plate 331 or the second movable plate 332 performs a synchronous swinging action.

[0148] Exemplarily, the first movable plate 331 and the second movable plate 332 of the linkage assembly 33 are threadedly connected, when one of the first movable plate 331 or the second movable plate 332 is pushed by the driving rod 333, the other first movable plate 331 or the second movable plate 332 makes a synchronous swing action.

[0149] In some embodiments, referring to Figures 1 to 5 in combination, the linkage assembly 33 further comprises a cam 335 and a swing arm 336. The cam 335 is rotatably arranged on the first rack 11. The swing arm 336 is sequentially provided with a first connecting portion 33C, a roller portion 33D and a second connecting portion 33E, the first connecting portion 33C is rotatably connected with the driving rod 333, the second connecting portion 33E is rotatably connected with the first rack 11, the roller portion 33D is arranged on one side of the swing arm 336 close to the cam 335, and the roller portion 33D is matched with the cam 335 to drive the driving rod 333 to make up and down actions.

[0150] Specifically, the cam 335 is rotatably arranged on the first rack 11, the cam 335 is matched with the roller portion 33D to realize the up or down action of the driving rod 333. It can be understood that the second connecting portion 33E is connected with the first rack 11, the first connecting portion 33C is the movable end, the cam 335 rotates to abut against the roller portion 33D, so that the driving rod 333 connected with the first connecting portion 33C moves up and down, thereby realizing the up or down action of the driving rod 333.

[0151] Exemplarily, the movable end is one end of the swing arm 336.

[0152] Exemplarily, the first connecting portion 33C is configured in a spherical shape, and the driving rod 333 is provided with a fisheye bearing matched with the spherical shape in rotation.

[0153] Exemplarily, the second connecting portion 33E is configured in a hole shape, and the first rack 11 is rotatably connected with the second connecting portion 33E through a rotating shaft matched with a bearing.

[0154] In some embodiments, referring to Figures 1 to 5 in combination, the bag feeding device for the packaging machine further comprises a first sensing assembly C and a second sensing assembly D. The first sensing assembly C comprises a first photoelectric sensor C1 and a sensing piece C2. The first photoelectric sensor C1 is fixedly connected to the second rack 21, and the sensing piece C2 is fixedly arranged on the hanging rack 22 and oppositely arranged with the first photoelectric sensor C1. The sensing piece C2 is controlled to swing by the hanging rack 22 to control the rotation state of the second conveying belt 221.

[0155] The second sensing assembly D comprises a second photoelectric sensor D1 and a vertical plate D2. The second photoelectric sensor D1 is located at one side of the first frame 11 along the bag conveying direction. The vertical plate D2 is fixed to one side of the first frame 11, and the second photoelectric sensor D1 is installed on the vertical plate D2. The second photoelectric sensor D1 is used to sense the bags conveyed by the second conveying belt 221 and drive the bag feeding assembly 31 to feed the bags and the suction cup assembly 32 to suck the bags.

[0156] Specifically, the first sensing assembly C comprises a first photoelectric sensor C1 and a sensing member C2. The first photoelectric sensor C1 is used to detect the relative position of the sensing member C2, so as to judge the swing amplitude of the hanging frame 22, and further judge the height of the bag stack on the first conveying belt 12, so as to control the rotation state of the second conveying belt 221. Here, the rotation state of the second conveying belt 221 can be one of the stop state, the acceleration state or the deceleration state. Through this setting, the height of the bag stack on the first conveying belt 12 can be intelligently monitored in real time, which is beneficial to automatic control and improves the error caused by manual monitoring.

[0157] The second sensing assembly D comprises a second photoelectric sensor D1 and a vertical plate D2. The second photoelectric sensor D1 is used to monitor the bags conveyed by the second conveying belt 221 and drive the bag feeding assembly 31 to feed the bags and the suction cup assembly 32 to suck the bags.

[0158] In one embodiment, the first photoelectric sensor C1 and the second photoelectric sensor D1 are respectively electrically connected with a PLC controller. The PLC controller connected with the photoelectric sensor is a prior art, which will not be discussed in detail here.

[0159] As an exemplary first embodiment, the bag bodies of the packaging bags are manually placed into the first conveying belt 12 of the first frame 11. The first conveying belt 12 rotates to feed the bag bodies to the relative position of the second conveying belt 221. For the stacked bags, the second conveying belt 221 of the hanging frame 22 successively and sequentially rolls against the upper surfaces of each stacked bag, and the hanging frame 22 swings along the same conveying direction of the bag bodies to make a circular arc trajectory. When the second conveying belt 221 feeds the bags to the second bag feeding device 3 station, the bag feeding assembly 31 and the suction cup assembly 32 act in coordination. The bag feeding assembly 31 transmits a single bag body to the suction cup assembly 32. The suction cup assembly 32 receives and sucks the single bag body transmitted by the bag feeding assembly 31. For the sucked bags, the bag feeding assembly 31 and the suction cup assembly 32 swing to the next station position, so that the bags are sequentially fed through the process of one-time conveying, bag arranging, two-time conveying and bag sucking.

[0160] As an exemplary second embodiment, the bag body of the packaging bag is manually placed into the first conveying belt 12 of the first rack 11, and the first conveying belt 12 rotates to send the bag body to the relative position of the second conveying belt 221. For the stacked bag body, the second conveying belt 221 placed in the hanging rack 22 rolls against the upper surface of each stacked bag body in sequence and order, and the hanging rack 22 can swing along the same conveying direction of the bag body to make a circular arc trajectory. When the second conveying belt 221 conveys the bag body to the work position of the second bag conveying device 3, the bag conveying assembly 31 and the suction cup assembly 32 act in coordination. The bag conveying assembly 31 transmits a single bag body to the suction cup assembly 32, and the suction cup assembly 32 receives and sucks the single bag body transmitted by the bag conveying assembly 31. For the sucked bag body, the bag conveying assembly 31 and the suction cup assembly 32 swing to the next work position.

[0161] Rotating the first adjusting handle A1, the bidirectional screw rod A2 rotates, the left-hand thread segment of the bidirectional screw rod A2 cooperates with the first shaft coupling A4 to rotate, and the right-hand thread segment of the bidirectional screw rod A2 cooperates with the second shaft coupling A5 to rotate, so that the first baffle A6 and the second baffle A7 are close to or away from each other relative to the axial direction of the deviation correction shaft A3, which is beneficial to deviation correction of the bag body in conveying.

[0162] According to different packaging bag requirements, the position of the second rack 21 on the first rack 11 can be pushed, and the second adjusting handle B1 is rotated to abut against the slide rod B2 to lock the position of the second rack 21 on the slide rod B2, so that the position of the second rack 21 on the first rack 11 can be adjusted, and the second conveying belt 221 on the second rack 21 can convey the bag body to the second bag conveying device 3 according to different bag body lengths.

[0163] As an exemplary third embodiment, the bag body of the packaging bag is manually placed into the first conveying belt 12 of the first rack 11, and the first conveying belt 12 rotates to send the bag body to the relative position of the second conveying belt 221. For the stacked bag body, the second conveying belt 221 placed in the hanging rack 22 rolls against the upper surface of each stacked bag body in sequence and order, and the hanging rack 22 can swing along the same conveying direction of the bag body to make a circular arc trajectory. When the second conveying belt 221 conveys the bag body to the work position of the second bag conveying device 3, the bag conveying assembly 31 and the suction cup assembly 32 act in coordination. The bag conveying assembly 31 transmits a single bag body to the suction cup assembly 32, and the suction cup assembly 32 receives and sucks the single bag body transmitted by the bag conveying assembly 31. For the sucked bag body, the bag conveying assembly 31 and the suction cup assembly 32 swing to the next work position.

[0164] Turning the first adjusting handle A1, the bidirectional screw A2 is rotated, the left-hand thread segment of the bidirectional screw A2 is rotated in cooperation with the first coupling A4, and the right-hand thread segment of the bidirectional screw A2 is rotated in cooperation with the second coupling A5, so that the first baffle A6 and the second baffle A7 are close to or away from each other relative to the axial direction of the deviation correction shaft A3, which is conducive to deviation correction of the bag in conveying.

[0165] According to different packaging bag requirements, the position of the second rack 21 on the first rack 11 can be pushed, and the second adjusting handle B1 is rotated to abut against the slide rod B2 to lock the position of the second rack 21 on the slide rod B2, so that the position of the second rack 21 on the first rack 11 can be adjusted, so that the second conveying belt 221 on the second rack 21 can convey the bag to the second bag conveying device 3 according to different bag lengths.

[0166] The device can also be provided with a first sensing assembly C and a second sensing assembly D. The first photoelectric sensor C1 is used to detect the relative position of the sensing part C2, so as to judge the swing amplitude of the hanging rack 22, and further obtain the height of the bag stack on the first conveying belt 12, so as to control the rotation state of the second conveying belt 221. The second photoelectric sensor D1 is used to monitor the bag conveyed by the second conveying belt 221, and drive the bag conveying assembly 31 to convey the bag and the suction cup assembly 32 to suck the bag. The first sensing assembly C and the second sensing assembly D are respectively connected with the PLC controller, so as to realize intelligent cooperation.

[0167] It can be understood that the above use modes / examples are only illustrative, and the operator can use them according to specific use requirements, which are not specifically limited here.

[0168] The above examples only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the patent scope. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the protection scope of the present application. Therefore, the protection scope of the present patent should be subject to the appended claims.

Claims

1. A bag feeding apparatus for a packaging machine, characterized in that The utility model relates to a bag conveying device, which comprises a first bag conveying device, a bag arranging device, a second bag conveying device and a spacing adjusting assembly. The first bag conveying device comprises a first frame and a first conveying belt, and the first conveying belt is rotatably arranged on the first frame. The bag arranging device comprises a second frame and a hanging frame, the second frame is mounted on the first frame, one end of the hanging frame is swingably connected to the second frame, and the other end is arranged at an angle along the horizontal direction of the first conveying belt and is spaced apart from the first conveying belt. The second bag conveying device comprises a bag conveying assembly and a suction disc assembly, and the bag conveying assembly and the suction disc assembly are swingably arranged on one side of the first frame. The bag conveying assembly is provided with a rotating wheel, and the suction disc assembly is configured to swing under the control of the bag conveying assembly to have a pressing action and suck the bag body conveyed by the rotating wheel when the rotating wheel conveys the bag body.

2. The bag feeding apparatus for a packaging machine according to claim 1, characterized in that, The first bag conveying device, the bag arranging device, the bag conveying assembly and the suction disc assembly are sequentially mounted on the first frame along the conveying direction of the bag body. The second frame and the first frame jointly define a swing space for the swinging of the hanging frame. During the conveying of the bag body by the first conveying belt, the second conveying belt is swingingly arranged in the swing space and conveys the bag body to the second bag conveying device. The first bag conveying device further comprises a first motor fixedly mounted on the first frame, a first driving wheel rotatably arranged on the first frame and in transmission connection with the first motor, and a first driven wheel rotatably arranged on the first frame and in transmission connection with the first driving wheel. One end of the first conveying belt is connected to the first driving wheel, and the other end is connected to the first driven wheel.

3. The bag feeding apparatus for a packaging machine according to claim 1, characterized in that, The first conveying belt is used for supporting and conveying the bag body to be conveyed. The first bag conveying device is further provided with a spacing adjusting assembly. The spacing adjusting assembly comprises a first adjusting handle rotatably inserted into the first frame, a bidirectional screw rotatably mounted on the first frame and connected to the first adjusting handle, a left-hand thread segment and a right-hand thread segment are arranged on the outer surface of the bidirectional screw, the left-hand thread segment is arranged on the outer peripheral surface of one end of the bidirectional screw, and the right-hand thread segment is arranged on the outer peripheral surface of the other end of the bidirectional screw. A correction shaft is arranged in parallel with and spaced apart from the bidirectional screw on the frame. The first coupling part is configured with a first through hole and a first threaded hole for matching the left-hand thread segment of the bidirectional screw, the first through hole is in sliding connection with the correction shaft, and the first threaded hole is in connection with the left-hand thread segment. The second coupling part is configured with a second through hole and a second threaded hole for matching the right-hand thread segment of the bidirectional screw, the second through hole is in sliding connection with the correction shaft, and the first threaded hole is in connection with the right-hand thread segment. A first baffle is arranged on one side of the first frame, and a second baffle is arranged on the other side of the first frame. ​ The first shaft is fixedly connected with the first baffle, and the second shaft is fixedly connected with the second baffle.

4. The bag feeding apparatus for a packaging machine according to claim 1, characterized in that, The bag arranging device further comprises: A second motor is fixedly installed on the second rack; A second driving wheel is rotatably arranged on the second rack and is in transmission connection with the second motor; A second driven wheel is rotatably arranged on the suspension rack and is in transmission connection with the second driving wheel; One end of the second conveying belt is connected with the second driving wheel, and the other end is connected with the second driven wheel.

5. The bag feeding apparatus for a packaging machine according to claim 1, characterized in that, The suspension rack further comprises: A guide plate has a mounting portion and a guide portion; the mounting portion is adjustably mounted on the second rack, and the guide portion is arranged at an angle along the horizontal direction of the first conveying belt; and the second conveying belt is mounted on the guide portion.

6. The bag feeding apparatus for a packaging machine according to claim 1, characterized in that, The bag arranging device is provided with a position adjusting assembly, which comprises: A second adjusting handle is rotatably inserted into the second rack; Sliding rods are fixedly installed on both sides of the first rack; Sliding blocks are respectively arranged on both sides of the second rack and are in sliding cooperation with the sliding rods; The second adjusting handle is configured to abut against the sliding rods to lock the position of the second rack on the sliding rods.

7. The bag feeding apparatus for a packaging machine according to claim 1, characterized in that, The bag conveying assembly comprises: A third motor is installed on the first rack; A rotating rod is swingingly arranged on the first rack, the rotating rod is in transmission connection with the third motor, and the rotating wheel is sleeved on the rotating rod; The suction cup assembly comprises: A connecting rod is swingingly arranged on the first rack; A suction cup is fixedly connected to the connecting rod, and the suction cup is configured to suck the bags conveyed by the rotating wheel.

8. A bag feeding apparatus for a packaging machine according to claim 7, characterized in that The second bag conveying device is further provided with a linkage assembly, which comprises: A first movable plate is connected at one end to the connecting rod and at the other end to the first rack in rotation; A second movable plate is connected at one end to the rotating rod in rotation and at the other end to the first rack in rotation; A driving rod is connected to the first movable plate in rotation, and the driving rod is configured to reciprocally push the first movable plate to make the first movable plate swing; A tension spring is connected to the first rack or the second movable plate; The first movable plate and the second movable plate have a common connecting fulcrum on the first rack, and the first movable plate and the second movable plate are connected to the first rack through the connecting fulcrum; The first movable plate is provided with a first abutting portion, the second movable plate is provided with a second abutting portion, and the first abutting portion and the second abutting portion are in abutting cooperation to make the second movable plate swing under the control of the first movable plate.

9. A bag feeding apparatus for a packaging machine according to claim 8, characterized in that, The linkage assembly further comprises: A cam is rotatably arranged on the first rack; The swing arm is sequentially provided with a first connecting portion, a roller portion and a second connecting portion; the first connecting portion is rotationally connected with the driving rod; the second connecting portion is rotationally connected with the first rack; the roller portion is arranged on the side of the swing arm close to the cam; Wherein, the roller portion is matched with the cam to drive the driving rod to make up-and-down movement.

10. A bag feeding apparatus for a packaging machine according to any one of claims 1-9, characterized in that, The bag conveying device for the packaging machine is further provided with a first sensing assembly and a second sensing assembly; The first sensing assembly comprises: A first photoelectric sensor fixedly connected with the second rack; A sensing member fixedly arranged on the hanging rack and oppositely arranged with the first photoelectric sensor; The sensing member is controlled to swing with the hanging rack to control the rotation state of the second conveying belt; The second sensing assembly comprises: A second photoelectric sensor arranged on one side of the first rack along the bag conveying direction; A vertical plate fixedly arranged on one side of the first rack; The second photoelectric sensor is installed on the vertical plate, and the second photoelectric sensor is used to sense the bags conveyed by the second conveying belt and drive the bag conveying assembly to convey the bags and the suction cup assembly to suck the bags.

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