CN216636994U - Packaging bag conveying mechanism of annular bag feeding type packaging machine - Google Patents

Abstract

The utility model provides a pocket type packagine machine's wrapping bag conveying mechanism is given to annular which characterized in that: the bag clamping device comprises a rack, an annular track, a control track, an annular conveying unit and at least one bag clamping device, wherein the annular track, the control track and the annular conveying unit are respectively installed on the rack, all the bag clamping devices can be movably installed on the annular track along the annular track, the annular conveying unit drives all the bag clamping devices to move along the annular track, and the control track controls the bag clamping devices to be unfolded and folded. The utility model can continuously convey the packaging bags, so that the packaging bags sequentially pass through each processing device according to the processing steps, the structure of the conveying mechanism is greatly simplified, the structure is more reasonable, the packaging bags are not easy to damage, the working efficiency is better, the energy consumption is less, and the packaging machine can be used for a vertical packaging machine and a horizontal packaging machine, so that the types of parts required by manufacturing various packaging machines are greatly reduced, and the manufacturing cost of the packaging machine is effectively reduced.

Description

Packaging bag conveying mechanism of annular bag feeding type packaging machine

Technical Field

The utility model relates to an annular bag feeding type packaging machine, in particular to a packaging bag conveying mechanism of the annular bag feeding type packaging machine.

Background

At present, the packaging machines for packaging materials are generally divided into a vertical packaging machine and a horizontal packaging machine, and the two packaging machines have different structures and different working principles. However, in order to improve the working efficiency of the existing packaging machine, a bag making device is usually adopted to immediately make continuous three-edge sealing bags with a film roll on the packaging machine for filling and sealing.

However, the three-side packaging bag structure has a small volume, is only suitable for liquid or powder materials, and is not suitable for large-particle solid materials (because the solid materials are used, the storable materials are further reduced), because the space formed by the three-side packaging bag structure is small and flat, more materials are consumed for storing the same materials, and the materials are easily wasted. In addition, in the process of testing before formal production, in the process of testing after changing specifications every time, even when the manufactured packaging bags are tested in operation when the machine is started again after shutdown every time, the manufactured packaging bags can only be wasted under the conditions, because the packaging bags cannot be reused.

In addition, the structure of the existing packaging machine is too complex, the packaging bag conveying mechanisms of the vertical packaging machine and the horizontal packaging machine have too many types of components and few general components due to too large structural difference, so that the manufacturing cost of a manufacturer is further increased, and the complex structure is easy to make mistakes, so that the failure rate of the packaging machine is difficult to reduce.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a packaging bag conveying mechanism of an annular bag feeding type packaging machine, which can continuously convey packaging bags to enable the packaging bags to sequentially pass through various processing devices according to processing steps, has a reasonable structure, and can be used for a vertical packaging machine and a horizontal packaging machine. The technical scheme is as follows:

the utility model provides a bag packaging machine's wrapping bag conveying mechanism is given to annular which characterized in that: the bag clamping device comprises a rack, an annular rail, a control rail, an annular conveying unit and at least one bag clamping device, wherein the annular rail, the control rail and the annular conveying unit are respectively installed on the rack, all the bag clamping devices can be movably installed on the annular rail along the annular rail, the annular conveying unit drives all the bag clamping devices to move along the annular rail, and the control rail controls the bag clamping devices to be unfolded and folded. When the bag clamping device is unfolded, the bag opening of the packaging bag clamped by the bag clamping device can be closed, and when the bag clamping device is folded, the bag opening of the packaging bag clamped by the bag clamping device can be opened.

The better scheme, annular conveying unit includes annular hold-in range, hold-in range actuating mechanism, and annular hold-in range, hold-in range actuating mechanism install respectively in the frame, and hold-in range actuating mechanism drives the motion of annular hold-in range, and all bag clamping devices are connected to the annular hold-in range, and hold-in range actuating mechanism drives the motion of annular hold-in range for the annular hold-in range drives bag clamping device and moves along circular orbit, and control track control bag clamping device accomplishes and expandes, fold the action.

The utility model provides a better scheme, hold-in range actuating mechanism includes first motor, first action wheel, first driven wheel, first driving belt, first pivot, the second pivot, two synchronous pulley, first motor is installed in the frame, first action wheel is installed in the first output shaft of first motor, first pivot, the second pivot is rotationally installed in the frame respectively, first driven wheel is installed in first pivot, first driving belt cover is established on first action wheel, first driven wheel, two synchronous pulley are fixed respectively in first pivot, in the second pivot, annular hold-in range cover is established on two synchronous pulley. Preferably, the first motor is a servo motor.

The other scheme is that the synchronous belt driving mechanism comprises a second motor, a first rotating shaft, a second rotating shaft and two synchronous belt wheels, the second motor is installed on the rack, the first rotating shaft and the second rotating shaft are respectively and rotatably installed on the rack, the two synchronous belt wheels are respectively fixed on the first rotating shaft and the second rotating shaft, the annular synchronous belt is sleeved on the two synchronous belt wheels, and a fourth output shaft of the second motor is connected with the first rotating shaft. Preferably, the second motor is a servo motor.

Preferably, the packaging bag conveying mechanism is vertically arranged (for a vertical packaging machine) or horizontally arranged (for a horizontal packaging machine).

According to a better scheme, the packaging bag conveying mechanism further comprises at least one track position adjusting mechanism, the track position adjusting mechanism comprises at least one track adjusting unit and at least one adjusting mechanism driving unit, the track adjusting unit comprises a lead screw, a nut, an adjusting plate and at least one adjusting rod, the lead screw is rotatably arranged on the rack, a second driven wheel is fixed on the lead screw, the nut is sleeved on the lead screw, the adjusting plate is arranged on the nut, one end of the adjusting rod is connected with the adjusting plate, and the other end of the adjusting rod penetrates through the rack to be connected with the control track; the adjusting mechanism driving unit drives the screw rod of each track adjusting unit to rotate.

The utility model provides a scheme, the figure of track regulation unit is a plurality of, and the figure of adjustment mechanism drive unit is one, adjustment mechanism drive unit includes fourth motor, reducing gear box, second driving belt, second action wheel, at least one second driven wheel, and the second driven wheel is the same and the one-to-one with track regulation unit figure, and track regulation unit installs in the frame, and every second driven wheel is installed in the track regulation unit that corresponds, and fourth motor, reducing gear box are installed respectively in the frame, and the reducing gear box is connected to the fourth motor, and the second action wheel is installed on the output shaft of reducing gear box, and second driving belt cover is established on second action wheel and all second driven wheels.

In another scheme, the number of the track adjusting units is the same as that of the adjusting mechanism driving units, the track adjusting units and the adjusting mechanism driving units are in one-to-one correspondence, each adjusting mechanism driving unit comprises a third motor, and the third motors are connected with the screw rods of the corresponding track adjusting units.

According to a more preferable scheme, the track adjusting unit further comprises at least one first sliding sleeve, the number of the first sliding sleeves is the same as that of the adjusting rods, the first sliding sleeves correspond to the adjusting rods one by one, the first sliding sleeves are installed on the rack, and the adjusting rods penetrate through the corresponding first sliding sleeves respectively.

Preferably, the track adjusting unit further comprises a screw rod seat, the screw rod seat is mounted on the machine frame, and the screw rod is rotatably mounted on the screw rod seat.

According to a more preferable scheme, the track position adjusting mechanism further comprises at least one guide unit, the guide unit comprises a guide rod and a second sliding sleeve, the second sliding sleeve is installed on the rack, one end of the guide rod is connected with the control track, and the other end of the guide rod penetrates through the second sliding sleeve.

The better scheme, the double-layered bagging apparatus includes mounting panel, two sack clamping device, spring, the mechanism that opens and shuts, and mounting panel slidable ground is installed on the circular orbit, and two sack clamping device rear portions are articulated mounting panel respectively, and two sack clamping device middle parts are connected respectively at the spring both ends and two sack clamping device front ends are forced and are drawn close each other, the mechanism that opens and shuts has by the control end, supports the control track by the control end to the control track is through forcing by the end lift, thereby with the spring fit, the mechanism that opens and shuts is controlled drives two sack clamping device front ends and is close to each other or keep away from each other, accomplishes and expand, fold the action.

More preferred scheme, mechanism that opens and shuts includes gyro wheel, supporting seat, swing span, control lever, set-square, pendulum rod, is the gyro wheel by the end, and the supporting seat is fixed on the mounting panel bottom surface, and the swing span middle part articulates the supporting seat, and the gyro wheel is installed in the swing span bottom, and the control lever both ends articulate the swing span top respectively, the first end of set-square, and a sack clamping device rear end is connected to set-square second end, and another sack clamping device rear end is connected to pendulum rod one end, and the pendulum rod other end is articulated with set-square third end.

In a more preferred embodiment, the control track has at least one bag opening expanding area, and the control track located in the bag opening expanding area is recessed toward a direction away from the annular track. Therefore, the control track controls the bag clamping device to fold, so that the bag opening of the packaging bag clamped by the bag clamping device is opened.

Compared with the prior art, the utility model has the advantages that the packaging bag conveying mechanism adopts the annular conveying unit to drive the bag clamping device to move along the annular track, and adopts the control track to control the bag clamping device to complete the unfolding and folding actions, so the packaging bags can be continuously conveyed, the packaging bags sequentially pass through each processing device according to the processing steps, the structure of the conveying mechanism is greatly simplified, the structure is more reasonable, the packaging bags are not easy to damage, the working efficiency is better, the energy consumption is lower, the packaging bag conveying mechanism can be used for a vertical packaging machine and a horizontal packaging machine, the types of parts required by manufacturing various packaging machines are greatly reduced, and the manufacturing cost of the packaging machine is effectively reduced.

Drawings

FIG. 1 is a front view of one embodiment of the present invention;

FIG. 2 is a schematic perspective view of FIG. 1;

FIG. 3 is a schematic view showing the construction of the endless track, endless transfer unit of the embodiment shown in FIG. 1;

FIG. 4 is a rear view of FIG. 3;

FIG. 5 is a schematic structural diagram of the control track and the track position adjusting mechanism of the embodiment shown in FIG. 1;

FIG. 6 is a rear view of FIG. 5;

FIG. 7 is a schematic view of the control track of the embodiment of FIG. 1, illustrating the engagement of a track adjustment unit;

FIG. 8 is a schematic view of the open position of the bag mouth gripping means when the bag gripping means is closed according to one embodiment of the present invention;

FIG. 9 is a schematic view of the closed configuration of the pocket retainers of the embodiment of FIG. 8 when the pocket retainers are closed;

FIG. 10 is a schematic view of the embodiment of the bag holding device of FIG. 8 shown in an expanded configuration;

fig. 11 is a schematic view of a vertical packing machine using the embodiment shown in fig. 1;

fig. 12 is a schematic structural view of a horizontal type packing machine using the embodiment shown in fig. 1;

FIG. 13 is a schematic diagram of the construction of a prefabricated bag used in the embodiment of FIG. 1.

Detailed Description

Only one bag holding device is shown in fig. 1, and in practice this embodiment is fitted with a plurality of bag holding devices. In fig. 2, the frame 1 is shown in dashed lines for the purpose of facilitating the view of the parts hidden by the frame.

As shown in fig. 1 to 10, in an embodiment of the present application, a packaging bag conveying mechanism of a circular bag feeding type packaging machine using the above conveying method includes a frame 1, a circular rail 2, a control rail 3, a circular conveying unit 4, and a plurality of bag clamping devices 5, where the circular rail 2, the control rail 3, and the circular conveying unit 4 are respectively installed on the frame 1, all the bag clamping devices 5 are movably installed on the circular rail 2 along the circular rail 2, the circular conveying unit 4 drives all the bag clamping devices 5 to move along the circular rail 2, and the control rail 3 controls the bag clamping devices 5 to unfold and fold. The bag clamping device 5 is unfolded to close the mouth of the packaging bag clamped by the bag clamping device 5, and the bag clamping device 5 is folded to open the mouth of the packaging bag clamped by the bag clamping device 5.

An alternative embodiment, the endless conveying unit 4 includes an endless synchronous belt 401 and a synchronous belt driving mechanism 402, the endless synchronous belt 401 and the synchronous belt driving mechanism 402 are respectively installed on the frame 1, the synchronous belt driving mechanism 402 drives the endless synchronous belt 401 to move, the endless synchronous belt 401 is connected to all the bag clamping devices 5, the synchronous belt driving mechanism 402 drives the endless synchronous belt 401 to move, so that the endless synchronous belt 401 drives the bag clamping devices 5 to move along the circular track 2, and the control track 3 controls the bag clamping devices 5 to complete the unfolding and folding actions.

In an alternative embodiment, the endless conveyor unit may employ other similar transmission mechanisms capable of moving the bag holding device 5 along the endless track 2, such as the endless conveyor unit 4 using a chain instead of the endless timing belt 401.

In an alternative embodiment, the bag feeding mechanism is vertically disposed (for use in a vertical packaging machine).

In an alternative embodiment, the bag feeding mechanism is arranged horizontally (for horizontal packaging machines).

In an alternative embodiment, the synchronous belt driving mechanism 402 includes a first motor 4021, a first driving pulley 4022, a first driven pulley 4023, a first transmission belt 4024, a first rotating shaft 4025, a second rotating shaft 4026, and two synchronous pulleys 4027, the first motor 4021 is installed on the frame 1, the first driving pulley 4022 is installed on a first output shaft of the first motor 4021, the first rotating shaft 4025 and the second rotating shaft 4026 are respectively installed on the frame 1 in a rotatable manner, the first driven pulley 4023 is installed on the first rotating shaft 4025, the first transmission belt 4024 is sleeved on the first driving pulley 4022 and the first driven pulley 4023, the two synchronous pulleys 4027 are respectively fixed on the first rotating shaft 4025 and the second rotating shaft 4026, and the annular synchronous belt 401 is sleeved on the two synchronous pulleys 4027. In this embodiment, the first motor 4021 is a servo motor.

In an alternative embodiment, the synchronous belt driving mechanism includes a second motor, a first rotating shaft 4025, a second rotating shaft 4026, and two synchronous pulleys 4027, the second motor is installed on the frame 1, the first rotating shaft 4025 and the second rotating shaft 4026 are respectively and rotatably installed on the frame 1, the two synchronous pulleys 4027 are respectively fixed on the first rotating shaft 4025 and the second rotating shaft 4026, the annular synchronous belt 401 is sleeved on the two synchronous pulleys 4027, and a fourth output shaft of the second motor is connected to the first rotating shaft 4025. The second motor is a servo motor. The present embodiment is different from the previous embodiment in that a belt transmission mechanism is not used, and the servo motor is directly used to drive the first rotating shaft 4025 to rotate. A servo motor and a reduction box can also be considered to drive the first rotating shaft 4025 to rotate.

In an alternative embodiment, the packaging bag conveying mechanism further includes a rail position adjusting mechanism 6, the rail position adjusting mechanism 6 includes an adjusting mechanism driving unit 601 and two rail adjusting units 602, the adjusting mechanism driving unit 601 includes a fourth motor 6011, a reduction gearbox 6012, a second transmission belt 6013, a second driving wheel 6014, two second driven wheels 6015, the number of the second driven wheels 6015 is the same as that of the rail adjusting units 602 and corresponds to one another, the rail adjusting units 602 are installed on the frame 1, each second driven wheel 6015 is installed on the corresponding rail adjusting unit 602, the fourth motor 6011 and the reduction gearbox 6012 are respectively installed on the frame 1, the fourth motor 6011 is connected to the reduction gearbox 6012, the second driving wheel 6014 is installed on an output shaft of the reduction gearbox 6012, and the second transmission belt 3 is sleeved on the second driving wheel 6014 and all the second driven wheels 6015. In this embodiment, the fourth motor 6011 is a servo motor.

In an alternative embodiment, the track adjusting unit 602 includes a screw rod 6021, a nut 6022, an adjusting plate 6023, and two adjusting rods 6024, the screw rod 6021 is rotatably mounted on the frame 1, the second driven wheel 6015 is fixed on the screw rod 6021, the nut 6022 is sleeved on the screw rod 6021, the adjusting plate 6023 is mounted on the nut 6022, one end of the adjusting rod 6024 is connected to the adjusting plate 6023, and the other end of the adjusting rod 6024 penetrates through the frame 1 and is connected to the control track 3.

In an alternative embodiment, the track adjusting unit 602 further comprises two first sliding sleeves 6025, the first sliding sleeves 6025 are the same in number and correspond to the adjusting rods 6024 one by one, the first sliding sleeves 6025 are installed on the frame 1, and the adjusting rods 6024 respectively pass through the corresponding first sliding sleeves 6025.

In an alternative embodiment, the track adjustment unit 602 further comprises a screw base 6026, the screw base 6026 is mounted to the frame 1, and the screw 6021 is rotatably mounted to the screw base 6026.

In an alternative embodiment, the track position adjustment mechanism 6 further includes two guiding units 603, the guiding units 603 include a guide rod 6031 and a second sliding sleeve 6032, the second sliding sleeve 6032 is mounted on the frame 1, one end of the guide rod 6031 is connected to the control track 3, and the other end of the guide rod 6031 passes through the second sliding sleeve 6032.

In an alternative embodiment, the number of the track adjusting units 602 is one, and the adjusting mechanism driving unit 601 includes a third motor, and the third motor is connected to the screw 6021. In this embodiment, the third motor is a servo motor. A servo motor and a reduction gearbox can also be considered to drive the screw rod 6021 to rotate.

In an alternative embodiment, the bag conveying mechanism further comprises a protective side plate 7, and the protective side plate 7 is mounted on the frame through a mounting column 8.

In an alternative embodiment, the bag clamping device 5 comprises a mounting plate 501, two bag mouth clamping devices 502, a spring 503 and an opening and closing mechanism 504, the mounting plate 501 is slidably mounted on the circular track 2, the rear parts of the two bag mouth clamping devices 502 are respectively hinged with the mounting plate 501, two ends of the spring 503 are respectively connected with the middle parts of the two bag mouth clamping devices 502 and force the front ends of the two bag mouth clamping devices 502 to be close to each other, the opening and closing mechanism 504 comprises a roller 5041, a supporting seat 5042, a swinging rack 5043, a lever 5044, a triangle 5045 and a swinging rod 5046, the supporting seat 5042 is fixed on the bottom surface of the mounting plate 501, the middle part of the swinging rack 5043 is hinged with the supporting seat 5042, the roller 5041 is mounted at the bottom end of the swinging rack 5043, two ends of the lever 5044 are respectively hinged with the top end of the swinging rack 5043 and the first end of the triangle 5045, the second end of the triangle 5045 is connected with the rear end of one bag mouth clamping device 502, one end of the swinging rod 5046 is connected with the rear end of the other bag mouth clamping device 502, the other end of the swinging rod 5046 is hinged with the third end of the triangle 5045.

In this embodiment, the bag mouth clamping device 502 is a clamp which is driven by an air cylinder to open and close. Referring to fig. 8-10, the opening and closing of the clamps of the bag mouth clamping devices 502 are driven by air cylinders, and the opening and the clamping of the clamps can be carried out when the two bag mouth clamping devices 502 are unfolded or when the two bag mouth clamping devices 502 are folded. The producer can select according to actual needs.

In an alternative embodiment, the control track 3 has a pocket-opening area 301, and the control track 3 located in the pocket-opening area 301 is recessed away from the ring track 2, as shown in fig. 7. In this way, the control track 3 controls the bag clamping device 5 to close, so that the mouth of the packaging bag clamped by the bag clamping device 5 is opened, and the material is filled.

As shown in fig. 11, the vertical packaging machine manufactured by using the packaging bag conveying mechanism of the present application includes not only the packaging bag conveying mechanism, but also a first packaging bag pick and place mechanism 9, a first filling mechanism 10, and a first sealing mechanism 11, which are sequentially distributed from left to right along the top of the circular track 2.

As shown in fig. 12, the horizontal packaging machine manufactured by using the packaging bag conveying mechanism of the present application includes not only the packaging bag conveying mechanism, but also a second packaging bag pick-and-place mechanism 12, a second filling mechanism 13, and a second sealing mechanism 14, which are sequentially distributed from left to right along the outer side of the circular track 2.

The working process of the packaging bag conveying mechanism of the annular bag feeding type packaging machine is as follows: the bag clamping device moves along an annular track and sequentially passes through each processing station, and the control track is adopted to control the bag clamping device to be unfolded and folded, so that the bag opening of the packaging bag clamped by the bag clamping device is opened and closed.

The bag clamping device is driven by a synchronous belt to move along an annular track.

The bag clamping device is provided with a power driving unit, and the power driving unit drives the bag clamping device to move. The bag-clamping device can be moved along an endless track, just like a trolley, but this solution is very costly.

The distance between the control track and the annular track is adjusted, so that the bag clamping device can clamp packaging bags with different bag widths.

The package is a prefabricated bag, as shown in fig. 13. The prefabricated bag is a packaging bag which is customized according to requirements in advance, such as an organ bag, an eight-side packaging bag and the like. Because can adopt professional equipment to produce the wrapping bag that its structure can satisfy the material demand of depositing according to the material, consequently more can satisfy the demand of depositing the material than the wrapping bag that traditional membrane book was made immediately, especially the monoblock solid material of great volume, like bold candy, toy, plastic bowl, cake etc..

In an alternative embodiment, the ring-and-bag packaging machine is a vertical packaging machine.

In an alternative embodiment, the ring-feed bag-type packaging machine is a horizontal type packaging machine.

The application discloses wrapping bag conveying mechanism compares with traditional packagine machine (no matter adopt roll membrane to make continuous trilateral package bagging-off or prefabricated bag), and simple structure, part are few, and the bag width can automatically regulated moreover, job stabilization, be difficult to damage, and the commonality is good.

In addition, it should be noted that the names of the parts and the like of the embodiments described in the present specification may be different, and the equivalent or simple change of the structure, the characteristics and the principle described in the present patent idea is included in the protection scope of the present patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the utility model as defined in the accompanying claims.

Claims (10)

1. The utility model provides a bag packaging machine's wrapping bag conveying mechanism is given to annular which characterized in that: the bag clamping device comprises a rack, an annular rail, a control rail, an annular conveying unit and at least one bag clamping device, wherein the annular rail, the control rail and the annular conveying unit are respectively installed on the rack, all the bag clamping devices can be movably installed on the annular rail along the annular rail, the annular conveying unit drives all the bag clamping devices to move along the annular rail, and the control rail controls the bag clamping devices to be unfolded and folded.

2. The bag conveying mechanism of the circular bag feeding type packaging machine according to claim 1, wherein: the annular conveying unit comprises an annular synchronous belt and a synchronous belt driving mechanism, the annular synchronous belt and the synchronous belt driving mechanism are respectively installed on the rack, the synchronous belt driving mechanism drives the annular synchronous belt to move, the annular synchronous belt is connected with all bag clamping devices, the synchronous belt driving mechanism drives the annular synchronous belt to move, the annular synchronous belt drives the bag clamping devices to move along an annular track, and the control track controls the bag clamping devices to complete unfolding and folding actions.

3. The bag conveying mechanism of the circular bag feeding type packaging machine according to claim 2, wherein: synchronous belt drive mechanism includes first motor, first action wheel, first driven wheel, first driving belt, first pivot, the second pivot, two synchronous pulley, first motor is installed in the frame, first action wheel is installed on the first output shaft of first motor, first pivot, the second pivot is rotationally installed in the frame respectively, first driven wheel is installed in first pivot, first driving belt cover is established on first action wheel, first driven wheel, two synchronous pulley are fixed respectively in first pivot, in the second pivot, the annular synchronous belt cover is established on two synchronous pulley.

4. The bag conveying mechanism of the circular bag feeding type packaging machine according to claim 2, wherein: the synchronous belt driving mechanism comprises a second motor, a first rotating shaft, a second rotating shaft and two synchronous belt wheels, the second motor is installed on the rack, the first rotating shaft and the second rotating shaft are respectively and rotatably installed on the rack, the two synchronous belt wheels are respectively fixed on the first rotating shaft and the second rotating shaft, the annular synchronous belt is sleeved on the two synchronous belt wheels, and a fourth output shaft of the second motor is connected with the first rotating shaft.

5. The packing bag feed mechanism of the ring-feed type packing machine as claimed in any one of claims 1 to 4, wherein: the packaging bag conveying mechanism is vertically or horizontally arranged.

6. The bag conveying mechanism of the circular bag feeding type packaging machine according to claim 1, wherein: the packaging bag conveying mechanism further comprises at least one track position adjusting mechanism, the track position adjusting mechanism comprises at least one track adjusting unit and at least one adjusting mechanism driving unit, the track adjusting unit comprises a lead screw, a nut, an adjusting plate and at least one adjusting rod, the lead screw is rotatably installed on the rack, the second driven wheel is fixed on the lead screw, the nut is sleeved on the lead screw, the adjusting plate is installed on the nut, one end of the adjusting rod is connected with the adjusting plate, and the other end of the adjusting rod penetrates through the rack to be connected with the control track; the adjusting mechanism driving unit drives the screw rod of each track adjusting unit to rotate.

7. The bag feeding mechanism of a circular bag feeding type packaging machine according to claim 6, wherein: the track adjusting device is characterized in that the number of the track adjusting units is multiple, the number of the adjusting mechanism driving units is one, the adjusting mechanism driving units comprise fourth motors, reduction boxes, second transmission belts, second driving wheels and at least one second driven wheel, the second driven wheels are the same in number and correspond to the track adjusting units one by one, the track adjusting units are installed on the rack, each second driven wheel is installed on the corresponding track adjusting unit, the fourth motors and the reduction boxes are installed on the rack respectively, the fourth motors are connected with the reduction boxes, the second driving wheels are installed on output shafts of the reduction boxes, and the second transmission belts are sleeved on the second driving wheels and all the second driven wheels.

8. The bag feeding mechanism of a circular bag feeding type packaging machine according to claim 6, wherein: the track adjusting units are the same in number with the adjusting mechanism driving units, the track adjusting units and the adjusting mechanism driving units are in one-to-one correspondence, each adjusting mechanism driving unit comprises a third motor, and the third motors are connected with the screw rods of the corresponding track adjusting units.

9. The bag conveying mechanism of the circular bag feeding type packaging machine according to claim 1, wherein: the bag clamping device comprises a mounting plate, two bag mouth clamping devices, a spring and an opening and closing mechanism, wherein the mounting plate can be slidably mounted on an annular rail, the rear parts of the two bag mouth clamping devices are respectively hinged to the mounting plate, the two ends of the spring are respectively connected with the middle parts of the two bag mouth clamping devices and force the front ends of the two bag mouth clamping devices to be close to each other, the opening and closing mechanism is provided with a controlled end, the controlled end is abutted to the control rail, the control rail is lifted by the controlled end through forcing, therefore, the control opening and closing mechanism is matched with the spring and drives the front ends of the two bag mouth clamping devices to be close to each other or be away from each other, and the unfolding and closing actions are completed.

10. The bag feeding mechanism of a circular bag feeding type packaging machine according to claim 9, wherein: the mechanism that opens and shuts includes gyro wheel, supporting seat, swing span, control lever, set-square, pendulum rod, and controlled end is the gyro wheel, and the supporting seat is fixed on the mounting panel bottom surface, and the swing span middle part articulates the supporting seat, and the gyro wheel is installed in the swing span bottom, and the control lever both ends articulate the first end on swing span top, set-square respectively, and a sack clamping device rear end is connected to set-square second end, and another sack clamping device rear end is connected to pendulum rod one end, and the pendulum rod other end is articulated with set-square third end.

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