A bag taking device for an automatic packaging machine

Abstract

The application relates to a bag taking device for an automatic packaging machine and belongs to the technical field of packaging machines, which comprises a bag storage mechanism, the bag storage mechanism comprising an upper opening material frame; a bag taking mechanism, the bag taking mechanism comprising a suction disc assembly and a shaking assembly, the suction disc assembly being used for adsorbing packaging bags, and the shaking assembly being used for driving the suction disc assembly to shake so that the excess packaging bags adhered to the packaging bags directly adsorbed by the suction disc assembly fall off; wherein the bag storage mechanism further comprises a receiving assembly, the receiving assembly being movably arranged in the vertical direction in the material frame, and the receiving assembly being used for receiving the packaging bags shaken off by the bag taking mechanism on the top of the material frame. The shaking assembly drives the suction disc assembly to shake, so that the excess packaging bags simultaneously grabbed due to adhesion are effectively separated; the receiving assembly actively receives the packaging bags shaken off on the top of the material frame and makes the packaging bags stably reset, so that the next bag taking operation is stably carried out.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of packaging machines, and particularly relates to a bag taking device for an automatic packaging machine. BACKGROUND

[0002] An automatic packaging machine is a kind of machine for packaging products, and its main way is to package products with packaging bags to achieve the purposes of convenient transportation, safe storage and beauty. In order to meet the packaging bag needs of the automatic packaging machine during work, the automatic packaging machine is continuously provided with packaging bags through corresponding supporting facilities.

[0003] In order to continuously take bags, the packaging bags are stored in a bag box in the prior art, and then an automatic structure drives a negative pressure suction disc to take bags from the bag box. Although this method can meet the needs of continuous bag taking, multiple packaging bags are easily adhered together when the negative pressure suction disc takes bags, which affects the processing efficiency. SUMMARY

[0004] To solve the problem that the bag taking device of the existing automatic packaging machine is easily adhered together when the negative pressure suction disc takes bags, which affects the processing efficiency, the present application provides a bag taking device for an automatic packaging machine.

[0005] The object of the present application can be achieved by the following technical solutions:

[0006] A bag taking device for an automatic packaging machine, comprising: a bag storage mechanism, the bag storage mechanism comprising a material frame with an upper opening, the material frame being used for storing a flatly laid and stacked packaging bag stack; a bag taking mechanism, the bag taking mechanism comprising a suction disc assembly and a shaking assembly, the bag taking mechanism being capable of driving the suction disc assembly to enter or exit the material frame, the suction disc assembly being used for adsorbing packaging bags, and the shaking assembly being used for driving the suction disc assembly to shake so as to make the excess packaging bags adhered to the packaging bags directly adsorbed by the suction disc assembly to fall off; wherein the bag storage mechanism further comprises a receiving assembly, the receiving assembly being movably arranged in the material frame along a vertical direction, and the receiving assembly being used for receiving the packaging bags shaken off by the bag taking mechanism at the top of the material frame.

[0007] As a preferred technical solution of the present application, it further comprises a moving mechanism for driving the suction disc assembly to move along the vertical direction to enter or exit the material frame; the suction disc assembly comprises an L-shaped mounting plate, a connecting plate and a suction disc, the L-shaped mounting plate comprising a vertical plate arranged vertically and a horizontal plate arranged horizontally and connected to the lower end of the vertical plate, the vertical plate being connected to the moving end of the moving mechanism through the shaking assembly, the connecting plate being elastically connected to the horizontal plate, and a plurality of the suction discs being arranged on the lower side of the connecting plate.

[0008] As a preferred technical scheme of the present application, a guide rod is arranged between the horizontal plate and the connecting plate, the lower end of the guide rod is fixedly connected to the connecting plate, and the upper end of the guide rod is movably arranged through the horizontal plate; a tension spring is arranged outside the guide rod, the upper side of the tension spring abuts against the horizontal plate, and the lower side of the tension spring abuts against the connecting plate.

[0009] As a preferred technical scheme of the present application, the connecting plate is provided with an air injection hole penetratingly arranged in the vertical direction, a gap communicating with the outside is formed between the horizontal plate and the connecting plate, one end of the air injection hole communicates with the gap, and the other end of the air injection hole communicates with the side of the horizontal plate where the suction disc is arranged.

[0010] As a preferred technical scheme of the present application, the shaking assembly comprises a rotary motor and an eccentric wheel, the housing of the rotary motor is fixedly installed on the moving end, and the output shaft of the rotary motor is connected to the center end of the eccentric wheel; the vertical plate is rotatably connected to the eccentric end of the eccentric wheel through a hinged structure.

[0011] As a preferred technical scheme of the present application, the receiving assembly comprises a first receiving structure arranged on one side of the material frame, the first receiving structure comprises a first guide rail, a first sliding block, a first air cylinder and a first receiving plate, the first guide rail is arranged outside the material frame, the cylinder body of the first air cylinder is slidably connected to the first guide rail through the first sliding block in the vertical direction; a first air-avoiding groove is arranged in the vertical direction on one side of the material frame, the telescopic rod of the first air cylinder passes through the first air-avoiding groove to the inside of the material frame in the horizontal direction, and the first receiving plate is connected to the end of the telescopic rod of the first air cylinder extending into the inside of the material frame.

[0012] As a preferred technical scheme of the present application, a plurality of suction holes are arranged on the upper side of the first receiving plate, and the suction holes are communicated with a negative pressure generating device through air pipes.

[0013] As a preferred technical scheme of the present application, the receiving assembly further comprises: a second receiving structure symmetrically arranged on the other side of the material frame relative to the first receiving structure, the second receiving structure comprising a second guide rail, a second sliding block, a second air cylinder and a second receiving plate, the second guide rail being arranged outside the material frame, the cylinder body of the second air cylinder being connected to the second guide rail in a vertical sliding manner through the second sliding block; a second air gap is formed in the material frame on one side in a vertical direction, the second air cylinder rod penetrating through the second air gap to the inside of the material frame in a horizontal direction, and the second receiving plate being connected to the end of the second air cylinder rod extending into the inside of the material frame; the first sliding block and the second sliding block are of the same height, and the first air cylinder and the second air cylinder move synchronously; the receiving assembly has a first state and a second state; when the receiving assembly moves from the first state to the second state, the first air cylinder moves to the top of the first guide rail through the first sliding block, the second air cylinder moves to the top of the second guide rail through the second sliding block, and the first air cylinder and the second air cylinder both drive the extension rod to extend, so that the distance between the first receiving plate and the second receiving plate is less than the width of the packaging bag; when the receiving assembly moves from the second state to the first state, the first air cylinder slides downward through the first sliding block, the second air cylinder slides downward through the second sliding block, so that the first receiving plate and the second receiving plate abut downward against the packaging bag stack placed in the material frame, and the first air cylinder and the second air cylinder both drive the extension end to retract, so that the distance between the first receiving plate and the second receiving plate is greater than the width of the packaging bag.

[0014] As a preferred technical scheme of the present application, the bag taking device further comprises a rack, a first fixed pulley, a second fixed pulley, a first connecting rope and a second connecting rope, the moving mechanism being arranged in the rack, the first fixed pulley being arranged in the rack and located above the first sliding block, the first connecting rope being wound around the first fixed pulley, one end of the first connecting rope being connected to the moving end, and the other end being connected to the first sliding block; the second fixed pulley being arranged in the rack and located above the second sliding block, the second connecting rope being wound around the second fixed pulley, one end of the second connecting rope being connected to the moving end, and the other end being connected to the second sliding block; wherein the first fixed pulley and the second fixed pulley are arranged at the same height, and the height of the first fixed pulley and the second fixed pulley is higher than the highest height of the moving end, and the first connecting rope and the second connecting rope are of the same length.

[0015] As a preferred technical scheme of the present application, the first slider is provided with a first spring at the upper limit position of the first guide rail, and the second slider is provided with a second spring at the upper limit position of the second guide rail; when the mobile end drives the suction disc assembly to move downward to enter the material frame, the first connecting rope drives the first slider to move upward to press the first spring, the second connecting rope drives the second slider to move upward to press the second spring, and the telescopic rods of the first cylinder and the second cylinder are all retracted; when the mobile end drives the suction disc assembly to move upward to the shaking position, the first connecting rope drives the first slider to move downward to release the first spring, the second connecting rope drives the second slider to move downward to release the second spring, and the telescopic rods of the first cylinder and the second cylinder are all extended.

[0016] The present application has the following beneficial effects:

[0017] The present application provides a bag taking device for an automatic packaging machine, which generates shaking by driving the suction disc assembly through the shaking assembly, so as to effectively separate the excess packaging bags that are simultaneously grabbed due to adhesion; the receiving assembly actively receives the packaging bags shaken off at the top of the material frame and makes them reset stably, so as to ensure the stable operation of the next bag taking operation, and solve the problem of adhesion of multiple packaging bags during the bag taking operation, which affects the processing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to facilitate the understanding of those skilled in the art, the present application will be further described below in conjunction with the drawings.

[0019] Figure 1 It is a first structure schematic view of the bag taking device for the automatic packaging machine of the present application.

[0020] Figure 2 It is a second structure schematic view of the bag taking device for the automatic packaging machine of the present application.

[0021] Figure 3 It is a structure schematic view of the bag taking mechanism of the bag taking device for the automatic packaging machine of the present application.

[0022] Figure 4 It is a bottom view structure schematic view of the suction disc assembly of the bag taking device for the automatic packaging machine of the present application.

[0023] Figure 5 It is a first structure schematic view of the first receiving structure of the bag taking device for the automatic packaging machine of the present application.

[0024] Figure 6 It is a second structure schematic view of the first receiving structure of the bag taking device for the automatic packaging machine of the present application.

[0025] Figure 7 Fig. 1 is a schematic view of a top structure of a first receiving plate of a bag taking device for an automatic packaging machine.

[0026] Main symbol explanation

[0027] In the figure: 10, bag storage mechanism; 11, material frame; 111, first air-avoiding groove; 112, second air-avoiding groove; 12, first receiving structure; 121, first guide rail; 122, first air cylinder; 123, first receiving plate; 1231, suction hole; 13, second receiving structure; 20, bag taking mechanism; 21, suction disc assembly; 211, L-shaped mounting plate; 2111, vertical plate; 2112, horizontal plate; 212, connecting plate; 2121, air injection hole; 213, suction disc; 214, guide rod; 215, tension spring; 22, shaking assembly; 30, moving mechanism; 31, moving end; 40, rack; 50, first fixed pulley; 51, first connecting rope; 60, second fixed pulley; 61, second connecting rope. DETAILED DESCRIPTION

[0028] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined object, the specific embodiments, structures, features and effects according to the present application are described in detail below in combination with the drawings and preferred embodiments.

[0029] Please refer to Figures 1-7 The present embodiment provides a bag taking device for an automatic packaging machine, which comprises a bag storage mechanism 10, the bag storage mechanism 10 comprising a material frame 11 with an upper opening, the material frame 11 being used for storing a stack of flatly laid packaging bags; a bag taking mechanism 20, the bag taking mechanism 20 comprising a suction disc assembly 21 and a shaking assembly 22, the bag taking mechanism 20 being capable of driving the suction disc assembly 21 to enter or exit the material frame 11, the suction disc assembly 21 being used for adsorbing packaging bags, the shaking assembly 22 being used for driving the suction disc assembly 21 to shake so as to make the excess packaging bags adhered to the packaging bags directly adsorbed by the suction disc assembly 21 fall off; wherein the bag storage mechanism 10 further comprises a receiving assembly, the receiving assembly being movably arranged in the material frame 11 along a vertical direction, the receiving assembly being used for receiving the packaging bags shaken off by the bag taking mechanism 20 at the top of the material frame 11.

[0030] It can be understood that the present application aims to solve the problem of how to separate the adhered packaging bags, and based on this, the bag taking mechanism 20 of the present embodiment integrates the suction disc assembly 21 and the shaking assembly 22, when the suction disc assembly 21 adsorbs the packaging bags, if multiple bags are adhered, the shaking assembly 22 can drive the suction disc assembly 21 to vibrate, so as to utilize the effect of inertial force and air resistance to separate the uppermost adsorbed bag from the bags adhered below.

[0031] Further, considering the uncertainty of the falling trajectory and the final posture of the packaging bag shaken off by the shaking assembly 22, the packaging bag may be skewed or hung on the edge of the frame 11, and other falling bag confusion situations may occur, thereby seriously interfering with the continuity of the subsequent bag taking operation. The embodiment further adds a movable receiving assembly in the bag storage mechanism 10. The receiving assembly can move in the space inside the frame 11 and can be positioned and stopped at the top area of the frame 11. Thus, when the shaking action is performed, the receiving assembly can serve as a pre-set landing platform with precise position to actively support the packaging bag shaken off, ensuring that the packaging bag is always reset in a flat state and eliminating the interference of the falling bag confusion on the subsequent operation.

[0032] In some embodiments, the bag taking device further comprises a moving mechanism 30 for driving the suction cup assembly 21 to move in the vertical direction into or out of the frame 11; the suction cup assembly 21 comprises an L-shaped mounting plate 211, a connecting plate 212, and a plurality of suction cups 213. The L-shaped mounting plate 211 comprises a vertical plate 2111 arranged vertically, and a horizontal plate 2112 arranged horizontally and connected to the lower end of the vertical plate 2111. The vertical plate 2111 is connected to the moving end 31 of the moving mechanism 30 through the shaking assembly 22. The connecting plate 212 is elastically connected to the horizontal plate 2112. The plurality of suction cups 213 are arranged on the lower side of the connecting plate 212.

[0033] It can be understood that the moving mechanism 30 is used to control the lifting movement of the suction cup assembly 21, and the moving end 31 of the moving mechanism 30 provides a stable and controllable vertical movement path for the suction cup assembly 21, so that the suction cup assembly 21 can accurately enter the frame 11 to perform the bag taking task or leave the frame 11 to perform the subsequent bag moving operation. Further, considering that the suction cup assembly 21 needs to avoid rigid impact when contacting the packaging bag, and needs to ensure that all the suction cups 213 can reliably adhere to the packaging bag surface which may be slightly warped, the connecting plate 212 in the embodiment is suspended below the horizontal plate 2112 by an elastic connection, and the plurality of suction cups 213 arranged on the connecting plate 212 thus obtain a certain floating allowance, so that when the suction cups 213 fall and contact the bag surface, they can adapt to the slight unevenness of the bag surface, effectively buffer the impact force, and ensure that each suction cup 213 is balanced and stressed, achieving full sealing and reliable adhesion.

[0034] Further, a guide rod 214 is arranged between the horizontal plate 2112 and the connecting plate 212. The lower end of the guide rod 214 is fixedly connected to the connecting plate 212, and the upper end of the guide rod 214 is movably arranged through the horizontal plate 2112. A tension spring 215 is arranged outside the guide rod 214. The upper side of the tension spring 215 abuts against the horizontal plate 2112, and the lower side of the tension spring 215 abuts against the connecting plate 212.

[0035] It should be noted that, since the connecting plate 212 in the embodiment is suspended below the horizontal plate 2112 in an elastic connection manner through the guide rod 214 and the tension spring 215, the guide rod 214 ensures that the connecting plate 212 and the suction cups 213 thereon can only move linearly in a preset vertical direction, so that the vibration force generated by the shaking assembly 22 is efficiently and directionally converted into a vertical peeling action on the packaging bags, greatly improving the effectiveness and reliability of the separation action. At the same time, the elastic force provided by the tension spring 215 sleeved outside the guide rod 214 enables the shaking assembly 22 to obtain more effective separation effect with smaller input energy, realizing efficient utilization of vibration energy and collaborative optimization of separation efficiency.

[0036] In some embodiments, the connecting plate 212 is provided with a wind filling hole 2121 penetrating in the vertical direction, a gap communicating with the outside is formed between the horizontal plate 2112 and the connecting plate 212, one end of the wind filling hole 2121 communicates with the gap, and the other end of the wind filling hole 2121 communicates with one side of the horizontal plate 2112 where the suction cups 213 are arranged.

[0037] It should be noted that the wind filling hole 2121 provided in the embodiment functions to utilize the mechanical kinetic energy of the shaking assembly 22 to bring airflow kinetic energy that can assist the separation of the packaging bags. Specifically, when the shaking assembly 22 drives the suction cup assembly 21 to perform high-frequency vertical shaking, the gap between the connecting plate 212 and the horizontal plate 2112 will change periodically, so that during the shaking process, external air will be continuously and impulsively sucked into and pressed out of the wind filling hole 2121 through the gap, forming an airflow directed to the packaging bags. This airflow will cause the packaging bags below to vibrate or locally deform, and this dynamic effect can effectively destroy the weak adsorption force between the bags due to static electricity or large-area contact. Since the uppermost packaging bag is firmly adsorbed by the suction cups 213 and its position is relatively fixed, the bags below are in a free state, therefore, the impact effect of the airflow mainly acts on the packaging bags below, thereby increasing an aerodynamic force in addition to the inertial force generated by mechanical shaking, which jointly act to cause the adhered packaging bags to efficiently and reliably fall off from the adsorbed packaging bags.

[0038] In some embodiments, the shaking assembly 22 comprises: a rotary motor, a housing of the rotary motor is fixedly installed on the moving end 31, an output shaft of the rotary motor is connected to a center end of an eccentric wheel; a vertical plate 2111 is rotatably connected to an eccentric end of the eccentric wheel through a hinged structure. Wherein, the rotary motor serves as a power source to provide stable and reliable rotary input; the eccentric wheel fixed on the output shaft thereof serves as a core transmission and conversion mechanism. Since the center of mass of the eccentric wheel does not coincide with the center of rotation thereof, when it rotates at high speed, a constant size and periodically continuously changing direction centrifugal force is generated. This centrifugal force is transmitted to the suction cup assembly 21 connected to the vertical plate 2111 through the hinged structure, so as to effectively convert the tangential force of the circumferential motion of the eccentric wheel into driving the vertical plate 2111 and the suction cup assembly 21 connected thereto to perform high-frequency and small-amplitude reciprocating vibration. Optionally, the hinged structure can be a knuckle bearing or a fish-eye joint, which allows the vertical plate 2111 to have a rotational degree of freedom at the connection point with the eccentric wheel.

[0039] In some embodiments, the receiving assembly comprises: a first receiving structure 12 arranged on one side of the material frame 11, the first receiving structure 12 comprising a first guide rail 121, a first sliding block, a first air cylinder 122, and a first receiving plate 123. The first guide rail 121 is arranged outside the material frame 11, and the cylinder body of the first air cylinder 122 is connected to the first guide rail 121 through the first sliding block to slide in the vertical direction. A first air gap 111 is formed in the vertical direction on one side of the material frame 11, the extension rod of the first air cylinder 122 passes through the first air gap 111 to the inside of the material frame 11 in the horizontal direction, and the first receiving plate 123 is connected to the end of the extension rod of the first air cylinder 122 that extends into the inside of the material frame 11. In this embodiment, the sliding of the cylinder body of the first air cylinder 122 along the first guide rail 121 provides lifting movement in the vertical direction to accurately position the receiving height of the first receiving plate 123. At the same time, the horizontal extension and retraction of the extension rod of the first air cylinder 122 drives the first receiving plate 123 to perform the action of extending into the receiving position or retracting to avoid interference. In this way, the main part of the first air cylinder 122 is placed outside the material frame 11 to avoid interference, and the power is transmitted to the inside through the air gap, thereby efficiently completing the required compound motion of the first receiving plate 123 in a limited space, ensuring the accuracy and stability of the receiving function.

[0040] Further, the upper side of the first receiving plate 123 is provided with a plurality of suction holes 1231 which are communicated with the negative pressure generating device through air pipes. The embodiment provides the suction holes 1231 on the upper side of the first receiving plate 123 which are communicated with the negative pressure generating device, and adds the function of suction fixation on the basis of the receiving action of mechanical lifting, thereby fundamentally ensuring the reset flatness of the received packaging bags. When the packaging bags are shaken off, the suction force provided by the suction holes 1231 on the first receiving plate 123 will attract the packaging bags to fall onto the first receiving plate 123, the negative pressure acts on the surface of the bag body through the suction holes 1231, and a uniform suction force is generated to firmly suck the packaging bags on the surface of the first receiving plate 123, effectively overcoming the problem of secondary displacement and floating of the packaging bags due to their light and thin material, easy generation of static electricity or influence of air flow. Subsequently, when the first receiving plate 123 carrying the bag stably descends to the top of the packaging bag pile, the negative pressure is released, and the bag is placed flat on the bag pile, thereby providing an ideal working interface for the next bag taking operation.

[0041] In some embodiments, the receiving assembly further comprises: a second receiving structure 13 symmetrically arranged on the other side of the material frame 11 relative to the first receiving structure 12, the second receiving structure 13 comprising a second guide rail, a second sliding block, a second cylinder, and a second receiving plate, the second guide rail being arranged outside the material frame 11, the cylinder body of the second cylinder being connected to the second guide rail in the vertical direction through the second sliding block; a second air avoidance groove 112 is formed in the vertical direction on one side of the material frame 11, the extension rod of the second cylinder passes through the second air avoidance groove 112 to the inside of the material frame 11 in the horizontal direction, and the second receiving plate is connected to the end of the extension rod of the second cylinder extending into the inside of the material frame 11; the first sliding block and the second sliding block have the same height, and the first cylinder 122 and the second cylinder move synchronously; the receiving assembly has a first state and a second state; when the receiving assembly moves from the first state to the second state, the first cylinder 122 moves to the top of the first guide rail 121 through the first sliding block, the second cylinder moves to the top of the second guide rail through the second sliding block, and the first cylinder 122 and the second cylinder both drive the extension rod to extend, so that the distance between the first receiving plate 123 and the second receiving plate is less than the width of the packaging bag; when the receiving assembly moves from the second state to the first state, the first cylinder 122 slides downward through the first sliding block, and the second cylinder slides downward through the second sliding block, so that the first receiving plate 123 and the second receiving plate abut downward against the packaging bag pile placed in the material frame 11, and the first cylinder 122 and the second cylinder both drive the extension end to contract, so that the distance between the first receiving plate 123 and the second receiving plate is greater than the width of the packaging bag. It should be emphasized that the first receiving plate 123 and the second receiving plate generally move vertically between the top of the packaging bag pile in the material frame 11 and the top of the material frame 11.

[0042] It can be understood that the receiving assembly adopts a symmetrical arrangement of double-sided driving structure, that is, the first receiving structure 12 and the second receiving structure 13, and through the cooperation of the first receiving structure 12 and the second receiving structure 13, more stable and reliable receiving management of the bag stack is realized. Specifically, the heights of the first slider and the second slider are always kept synchronous and consistent, and the first cylinder 122 and the second cylinder are driven to realize synchronous movement by the control system, which ensures that the actions of the first receiving plate 123 and the second receiving plate on both sides are completely unified.

[0043] It needs to be explained that when the receiving task needs to be performed, the receiving assembly is converted from the first state to the second state; at this time, the first cylinder 122 and the second cylinder are synchronously lifted to the top of the first guide rail 121 and the second guide rail under the drive of the first slider and the second slider, and then the first cylinder 122 and the second cylinder synchronously extend the telescopic rods, drive the first receiving plate 123 and the second receiving plate to fold on the top of the frame 11, and the distance between the first receiving plate 123 and the second receiving plate is less than the width of the packaging bag, forming a stable and size-controllable receiving platform, which ensures that the packaging bag can be effectively lifted and will not fall from the middle. After the receiving task is completed, the receiving assembly is reset from the second state to the first state, at this time, the first receiving plate 123 and the second receiving plate are synchronously lowered by the first cylinder 122 and the second cylinder, until the first receiving plate 123 and the second receiving plate are lowered and abut against the packaging bag stack in the frame 11; then, the first receiving plate 123 and the second receiving plate are horizontally separated by the synchronous contraction of the cylinder telescopic rods, so that the distance between them is greater than the width of the packaging bag, completely avoiding the vertical space of the bag stack. The reset logic of "first vertical descent, then horizontal separation" when the first receiving plate 123 and the second receiving plate are horizontally separated in the supporting state, the static friction force between the plate surface and the packaging bag supported thereby will act transversely on the surface of the packaging bag, and this friction force will naturally expand the packaging bag to the two sides, effectively eliminating the wrinkles and deformation that may be generated during the falling or stacking process.

[0044] In some embodiments, the bag taking device further comprises a rack 40, a first fixed pulley 50, a second fixed pulley 60, a first connecting rope 51 and a second connecting rope 61, the moving mechanism 30 is arranged on the rack 40, the first fixed pulley 50 is arranged on the rack 40 and located on the upper side of the first slider, the first connecting rope 51 is wound around the first fixed pulley 50, one end of the first connecting rope 51 is connected to the moving end 31, and the other end is connected to the first slider; the second fixed pulley 60 is arranged on the rack 40 and located on the upper side of the second slider, the second connecting rope 61 is wound around the second fixed pulley 60, one end of the second connecting rope 61 is connected to the moving end 31, and the other end is connected to the second slider; wherein the first fixed pulley 50 and the second fixed pulley 60 are arranged at the same height, and the height of the first fixed pulley 50 and the second fixed pulley 60 is higher than the highest height of the moving end 31, and the lengths of the first connecting rope 51 and the second connecting rope 61 are the same.

[0045] It needs to be explained that, in this embodiment, the direction of force is changed by using the first fixed pulley 50 and the second fixed pulley 60, and then when the moving end 31 moves downward to perform bag taking, the first slider and the second slider are pulled upward by the connecting rope to make the receiving assembly ready at the standby position on the top of the material frame 11; on the contrary, when the moving end 31 returns upward after completing bag taking, the connecting rope is relaxed, and the first slider and the second slider move downward under the action of gravity to drive the receiving assembly to perform a descending action.

[0046] Further, considering that there may be an impact at the moment of action conversion of the receiving assembly, and the receiving assembly needs to be reliably and quickly reset after losing the upward pulling force of the rope, in this embodiment, a first spring is arranged at the upper limit position of the first guide rail 121 for the first slider, and a second spring is arranged at the upper limit position of the second guide rail for the second slider; when the moving end 31 drives the suction cup assembly 21 to move downward to enter the material frame 11, the first connecting rope 51 drives the first slider to move upward to compress the first spring, and the second connecting rope 61 drives the second slider to move upward to compress the second spring, and the extension rods of the first air cylinder 122 and the second air cylinder are all retracted; when the moving end 31 drives the suction cup assembly 21 to move upward to the shaking position, the first connecting rope 51 drives the first slider to move downward to release the first spring, and the second connecting rope 61 drives the second slider to move downward to release the second spring, and the extension rods of the first air cylinder 122 and the second air cylinder are all extended.

[0047] When the moving end 31 descends to pull the first slider to compress the first spring and the second slider to compress the second spring, the first spring and the second spring play a buffering role, effectively absorbing the impact energy when the first slider and the second slider reach the end of the stroke, reducing noise and component wear; when the moving end 31 ascends and the first connecting rope 51 and the second connecting rope 61 are relaxed, the compressed first spring and the second spring release the potential energy stored therein, which is converted into a downward thrust on the first slider and the second slider, ensuring that the receiving assembly can start the descending reset action, avoiding the possibility of jamming or delay due to resistance, and improving the action certainty of the system.

[0048] In some embodiments, the bag storage mechanism 10 further includes a weight sensor for detecting the total weight of the material frame 11 and the packaging bags placed therein. Through the weight sensor, the controller can estimate the remaining number of packaging bags in real time and give an early warning when the inventory is insufficient, realizing predictive maintenance and continuous production guarantee. Further, the controller can cross-verify the weight change after each bag taking with the bag taking action: if the weight does not decrease as expected, it may indicate empty grabbing or missed grabbing, triggering automatic retry; if the decrease is abnormal, it may indicate multiple grabbing.

[0049] Specifically, the bag taking device of the present application comprises a controller which is electrically connected to the bag storing mechanism 10, the bag taking mechanism 20 and the moving mechanism 30. A complete bag taking process is as follows:

[0050] S100, control the moving mechanism 30 to drive the suction cup assembly 21 to descend, so that the suction cup assembly 21 adsorbs the uppermost packaging bag in the material frame 11;

[0051] S200, control the moving mechanism 30 to drive the suction cup assembly 21 to ascend to a predetermined shaking height, and detect and judge whether the suction cup assembly 21 adsorbs multiple packaging bags through the weight sensor;

[0052] S300, if the judgment result is that the suction cup assembly 21 adsorbs multiple packaging bags, control the receiving assembly to move to the top of the material frame 11 to form a receiving platform, and start the shaking assembly 22 to make the suction cup assembly 21 vibrate;

[0053] S400, control the receiving assembly to carry the fallen packaging bags to descend to the top of the packaging bag stack in the material frame 11, and reset the receiving assembly to the avoiding state.

[0054] It should be explained that in some embodiments, step S200 can be cancelled, that is, without judging whether the suction cup assembly 21 adsorbs multiple packaging bags, the suction cup assembly 21 stays at the predetermined shaking height after each execution of the grabbing action, and is shaken for a predetermined time through the shaking assembly 22. The receiving assembly also stays for a predetermined time after moving to the top of the material frame 11 to form a receiving platform. After the predetermined time, the suction cup assembly 21 ascends to continue the bag feeding operation, and the receiving assembly descends to reset.

[0055] In step S200, if the judgment result is that only a single packaging bag is adsorbed, control the suction cup assembly 21 to ascend to continue the bag feeding operation.

[0056] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any modification, change, equivalent change and modification of the above embodiments, which does not depart from the technical solution of the present application, are still within the scope of the present application.

Claims

1. A bag taking device for an automatic packaging machine, characterized in that, The application relates to a bag storage and taking device. The bag storage and taking device comprises a bag storage mechanism and a bag taking mechanism. The bag storage mechanism comprises an upper-opened material frame for storing flatly stacked bag stacks. The bag taking mechanism comprises a suction disc assembly and a shaking assembly. The bag taking mechanism can drive the suction disc assembly to enter or leave the material frame. The suction disc assembly is used for adsorbing the bag. The shaking assembly is used for driving the suction disc assembly to shake so that the excess bags adhered to the bags directly adsorbed by the suction disc assembly fall off. The bag storage mechanism further comprises a receiving assembly. The receiving assembly is movably arranged in the material frame along the vertical direction. The receiving assembly is used for receiving the bags shaken off by the bag taking mechanism on the top of the material frame. The bag taking device further comprises a moving mechanism for driving the suction disc assembly to move along the vertical direction to enter or leave the material frame. The suction disc assembly comprises an L-shaped mounting plate, a connecting plate and a plurality of suction discs. The L-shaped mounting plate comprises a vertical plate and a horizontal plate. The vertical plate is movably connected to the moving end of the moving mechanism through the shaking assembly. The connecting plate is elastically connected to the horizontal plate. The plurality of suction discs are arranged on the lower side of the connecting plate. The receiving assembly comprises a first receiving structure arranged on one side of the material frame. The first receiving structure comprises a first guide rail, a first sliding block, a first cylinder and a first receiving plate. The first guide rail is arranged outside the material frame. The cylinder body of the first cylinder is slidably connected to the first guide rail along the vertical direction through the first sliding block. A first air-avoiding groove is formed in the material frame along the vertical direction. The extension rod of the first cylinder penetrates through the first air-avoiding groove to the inside of the material frame along the horizontal direction. The first receiving plate is connected to the end of the extension rod of the first cylinder penetrating into the inside of the material frame. The receiving assembly further comprises a second receiving structure symmetrically arranged on the other side of the material frame relative to the first receiving structure. The second receiving structure comprises a second guide rail, a second sliding block, a second cylinder and a second receiving plate. The second guide rail is arranged outside the material frame. The cylinder body of the second cylinder is slidably connected to the second guide rail along the vertical direction through the second sliding block. A second air-avoiding groove is formed in the material frame along the vertical direction. The extension rod of the second cylinder penetrates through the second air-avoiding groove to the inside of the material frame along the horizontal direction. The second receiving plate is connected to the end of the extension rod of the second cylinder penetrating into the inside of the material frame. The first sliding block and the second sliding block have the same height. The first cylinder and the second cylinder are synchronously moved. The receiving assembly has a first state and a second state. When the receiving assembly is moved from the first state to the second state, the first cylinder is moved to the top of the first guide rail through the first sliding block. The second cylinder is moved to the top of the second guide rail through the second sliding block. The first cylinder and the second cylinder are both driven to extend the extension rod so that the distance between the first receiving plate and the second receiving plate is smaller than the width of the bag. When the receiving assembly moves from the second state to the first state, the first cylinder slides down through the first slider, and the second cylinder slides down through the second slider, so that the first receiving plate and the second receiving plate downwardly abut the stack of packaging bags placed in the frame, and the first cylinder and the second cylinder both drive the telescopic ends to contract, so that the spacing between the first receiving plate and the second receiving plate is greater than the width of the packaging bags; The bag taking device further comprises a rack, a first fixed pulley, a second fixed pulley, a first connecting rope and a second connecting rope, the moving mechanism is arranged on the rack, the first fixed pulley is arranged on the rack and located on the upper side of the first slider, the first connecting rope is wound around the first fixed pulley, and one end of the first connecting rope is connected to the moving end and the other end is connected to the first slider; the second fixed pulley is arranged on the rack and located on the upper side of the second slider, the second connecting rope is wound around the second fixed pulley, and one end of the second connecting rope is connected to the moving end and the other end is connected to the second slider; wherein the first fixed pulley and the second fixed pulley are arranged at the same height, and the height of the first fixed pulley and the second fixed pulley is higher than the highest height of the moving end, and the first connecting rope and the second connecting rope are the same length.

2. The bag picking device for an automatic packaging machine according to claim 1, characterized in that, A guide rod is arranged between the horizontal plate and the connecting plate, the lower end of the guide rod is fixedly connected to the connecting plate, and the upper end of the guide rod is movably penetrated through the horizontal plate; a tension spring is sleeved on the guide rod, the upper side of the tension spring abuts against the horizontal plate, and the lower side of the tension spring abuts against the connecting plate.

3. The bag picking device for an automatic packaging machine according to claim 2, characterized in that, The connecting plate is provided with an air injection hole penetratingly arranged in the vertical direction, a gap communicating with the outside is formed between the horizontal plate and the connecting plate, one end of the air injection hole communicates with the gap, and the other end of the air injection hole communicates with the side of the horizontal plate where the suction disc is arranged.

4. The bag picking device for an automatic packaging machine according to claim 1, characterized in that, The shaking assembly comprises a rotary motor and an eccentric wheel, the shell of the rotary motor is fixedly installed on the moving end, and the output shaft of the rotary motor is connected to the center end of the eccentric wheel; the vertical plate is rotatably connected to the eccentric end of the eccentric wheel through a hinged structure.

5. The bag picking device for an automatic packaging machine according to claim 1, characterized in that, A plurality of suction holes are arranged on the upper side of the first receiving plate, and the suction holes are communicated with a negative pressure generating device through air pipes.

6. The bag picking device for an automatic packaging machine according to claim 1, characterized in that, The first slider is provided with a first spring at the upper limit position of the first guide rail, and the second slider is provided with a second spring at the upper limit position of the second guide rail; When the moving end drives the suction disc assembly to move downwardly into the frame, the first connecting rope drives the first slider to move upwardly to press the first spring, the second connecting rope drives the second slider to move upwardly to press the second spring, and the telescopic rods of the first cylinder and the second cylinder are both contracted. When the mobile end drives the suction cup assembly to move upward to the shaking position, the first connecting rope drives the first sliding block to move downward to release the first spring, the second connecting rope drives the second sliding block to move downward to release the second spring, and the telescopic rods of the first and second air cylinders are extended.

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