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

Packing bag conveying mechanism of ring-feeding bag packing machine

technical field

The utility model relates to a ring-shaped bag-feeding type packaging machine, in particular to a packaging bag conveying mechanism of the ring-shaped bag-feeding type packaging machine.

Background technique

At present, packaging machines used for material packaging are usually divided into vertical packaging machines and horizontal packaging machines. The two packaging machines have different structures and work principles. However, in order to improve the working efficiency of the existing packaging machine, the bag-making equipment is usually used to immediately use the roll film on the packaging machine to form a continuous three-side sealing packaging bag for filling and sealing.

However, the structure of this three-side sealing bag makes the volume inside it smaller, which is only suitable for liquid or powdery materials, not for solid materials with larger particles (because using for solid materials will further reduce the materials that can be stored) , because the space formed by this structure is small and flat, more materials are needed to store the same materials, and materials are easily wasted. Moreover, during the test run before the official production, the test run after each specification change, and even the test run of the produced packaging bag after each shutdown, the packaging bag produced in these cases can only be Wasted because these bags cannot be reused.

In addition, the structure of the existing packaging machine is too complicated, and the packaging bag conveying mechanism of the vertical packaging machine and the horizontal packaging machine is too structurally different, resulting in too many types of components for different packaging machines and few common components, which further increases production. The manufacturing cost of the packaging machine is high, and the complex structure is also prone to errors, which makes it difficult to reduce the failure rate of the packaging machine.

Utility model content

The purpose of this utility model is to provide a packaging bag conveying mechanism of a ring-shaped bag-feeding packaging machine, which can continuously convey packaging bags, so that the packaging bags pass through each Processing equipment, and reasonable structure, can be used for both vertical packaging machines and horizontal packaging machines. The technical solutions adopted are as follows:

A packaging bag conveying mechanism of a ring-shaped bag-feeding packaging machine is characterized in that: it comprises a frame, a ring-shaped track, a control track, a ring-shaped transfer unit, and at least one bag clamping device, and the ring-shaped track, the control track, and the ring-shaped transfer unit are respectively installed in the On the frame, all the bag clamping devices can be installed on the annular track so as to move 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 unfolding and closing of the bag clamping devices. When the bag clamping device is unfolded, the bag mouth of the packaging bag clamped by the bag clamping device can be closed, and when the bag clamping device is closed, the bag mouth of the packaging bag clamped by the bag clamping device can be opened.

In a better solution, the annular conveying unit includes an annular synchronous belt and a synchronous belt drive mechanism. The annular synchronous belt and the synchronous belt drive mechanism are respectively installed on the frame. The synchronous belt drive mechanism drives the annular synchronous belt to move, and the annular synchronous belt connects all the In the bag clamping device, the synchronous belt drive mechanism drives the annular synchronous belt to move, so that the annular synchronous belt drives the bag clamping device to move along the annular track, and the control track controls the bag clamping device to complete the unfolding and closing actions.

A preferred solution, the synchronous belt drive mechanism includes a first motor, a first driving wheel, a first driven wheel, a first transmission belt, a first rotating shaft, a second rotating shaft, two synchronous pulleys, a first motor Installed on the frame, the first driving wheel is installed on the first output shaft of the first motor, the first rotating shaft and the second rotating shaft are respectively rotatably installed on the frame, the first driven wheel is installed on the first rotating shaft, The first transmission belt is sleeved on the first driving wheel and the first driven wheel, the two synchronous pulleys are respectively fixed on the first rotating shaft and the second rotating shaft, and the annular synchronous belt is sleeved on the two synchronous pulleys. In a preferred solution, the first motor is a servo motor.

In another solution, the synchronous belt drive mechanism includes a second motor, a first rotating shaft, a second rotating shaft, and two synchronous pulleys, the second motor is mounted on the frame, and the first rotating shaft and the second rotating shaft are rotatably respectively Installed on the frame, two synchronous pulleys are respectively fixed on the first rotating shaft and the second rotating shaft, the annular synchronous belt is sleeved on the two synchronous pulleys, and the fourth output shaft of the second motor is connected to the first rotating shaft. In a preferred solution, the second motor is a servo motor.

In an optimal solution, the packaging bag conveying mechanism is set vertically (for vertical packaging machines) or horizontally (for horizontal packaging machines).

In a preferred solution, the packaging bag conveying mechanism further includes at least one orbital position adjustment mechanism, the orbital position adjustment mechanism includes at least one orbital adjustment unit and at least one adjustment mechanism drive unit, and the orbital adjustment unit includes a screw rod, a nut, and an adjustment mechanism. plate, at least one adjustment rod, the screw rod is rotatably installed on the frame, the second driven wheel is fixed on the screw rod, the nut is sleeved on the screw rod, the adjustment plate is installed on the nut, and one end of the adjustment rod is connected to the adjustment plate , the other end of the adjusting rod is connected to the control track through the frame; the driving unit of the adjusting mechanism drives the screw rod of each track adjusting unit to rotate.

In one solution, the number of the track adjustment units is multiple, and the number of the adjustment mechanism drive unit is one, and the adjustment mechanism drive unit includes a fourth motor, a reduction box, a second transmission belt, a second driving wheel, and at least one first drive unit. Two driven wheels, the number of the second driven wheel and the track adjustment unit is the same and one-to-one correspondence, the track adjustment unit is installed on the frame, each second driven wheel is installed on the corresponding track adjustment unit, the fourth motor and the reduction box are respectively Installed on the frame, the fourth motor is connected to the reduction box, the second driving wheel is installed on the output shaft of the reduction box, and the second transmission belt is sleeved on the second driving wheel and all the second driven wheels.

In another solution, the track adjustment units and the adjustment mechanism drive units have the same number and are in one-to-one correspondence, the adjustment mechanism drive unit includes a third motor, and the third motor is connected to the screw rod of the corresponding track adjustment unit.

In a more optimal solution, the track adjustment unit further includes at least one first sliding sleeve, the number of the first sliding sleeves and the adjustment rods are the same and correspond one-to-one, the first sliding sleeves are installed on the frame, and the adjustment rods pass through the corresponding adjustment rods respectively. The first slide.

In a more optimal solution, the track adjustment unit further includes a screw seat, the screw seat is mounted on the frame, and the screw is rotatably mounted on the screw seat.

In a more optimal solution, the track position adjustment mechanism further includes at least one guide unit, the guide unit includes a guide rod and a second sliding sleeve, the second sliding sleeve is installed on the frame, one end of the guide rod is connected to the control track, and the other end of the guide rod is connected. Pass through the second sliding sleeve.

In a preferred solution, the bag clamping device includes a mounting plate, two pocket opening clamping devices, a spring, and an opening and closing mechanism, the mounting plate is slidably installed on the annular track, and the rear parts of the two bag opening clamping devices are hinged respectively. the mounting plate, the two ends of the spring are respectively connected to the middle of the two pocket opening clamping devices and forcing the front ends of the two pocket opening clamping devices to move closer to each other, the opening and closing mechanism has a controlled end, the controlled end abuts the control rail, and the control rail By forcing the controlled end to rise and fall to cooperate with the spring, the control opening and closing mechanism drives the front ends of the two pocket opening clamping devices to approach or move away from each other to complete the unfolding and closing actions.

In a better solution, the opening and closing mechanism includes a roller, a support seat, a swing frame, a joystick, a triangular plate, and a swing rod. The controlled end is a roller, the support seat is fixed on the bottom surface of the mounting plate, and the middle of the swing frame is hinged to the support seat and the roller. Installed at the bottom end of the swinging frame, the two ends of the lever are hinged to the top of the swinging frame and the first end of the triangular plate, the second end of the triangular plate is connected to the rear end of one bag mouth clamping device, and one end of the swing rod is connected to the rear end of the other bag mouth clamping device , the other end of the pendulum rod is hinged with the third end of the triangular plate.

In a more preferred solution, the control track has at least one pocket opening area, and the control track located in the pocket opening area is recessed toward the direction away from the annular track. In this way, the control track controls the bag clamping device to close, so that the bag mouth of the packaging bag clamped by the bag clamping device is opened.

Compared with the prior art, the beneficial effect of the present invention is that, because the packaging bag conveying mechanism adopts the annular transmission unit to drive the bag clamping device to move along the annular track, and uses the control track to control the bag clamping device to complete the unfolding and closing actions, the packaging bag can be continuously conveyed. bag, so that the packaging bag passes through each processing equipment in sequence according to the processing steps, and greatly simplifies the structure of the conveying mechanism, making the structure more reasonable, not easy to damage, better working efficiency, lower energy consumption, and can be used for vertical The packaging machine can also be used for a horizontal packaging machine, which greatly reduces the types of parts and components required to manufacture various packaging machines, and effectively reduces the manufacturing cost of the packaging machine.

Description of drawings

Fig. 1 is the front view of one embodiment of the present utility model;

Fig. 2 is the three-dimensional structure schematic diagram of Fig. 1;

3 is a schematic structural diagram of the annular track and the annular conveying unit of the embodiment shown in FIG. 1;

Fig. 4 is the rear view of Fig. 3;

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

Fig. 6 is the rear view of Fig. 5;

FIG. 7 is a schematic diagram of the matching state of the control track and a track adjustment unit of the embodiment shown in FIG. 1;

8 is a schematic structural diagram of the bag opening clamping device in an open state when the bag clamping device is closed according to an embodiment of the present invention;

Fig. 9 is a schematic structural diagram of the bag mouth clamping device in a closed state when the bag clamping device of the embodiment shown in Fig. 8 is closed;

FIG. 10 is a schematic structural diagram of the bag-holding device of the embodiment shown in FIG. 8 when unfolded;

Figure 11 is a schematic structural diagram of the vertical packaging machine using the embodiment shown in Figure 1;

Fig. 12 is the structural representation of the horizontal packing machine that adopts the embodiment shown in Fig. 1;

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

Detailed ways

Only one bag-holding device is shown in FIG. 1 , in fact, there are several bag-holding devices installed in this embodiment. In order to facilitate the observation of the parts covered by the frame, in FIG. 2 , the frame 1 is represented by a dotted line.

As shown in Figures 1-10, in one embodiment of the present application, the packaging bag conveying mechanism of the annular bag-feeding packaging machine using the above-mentioned conveying method includes a frame 1, an annular rail 2, a control rail 3, an annular conveying unit 4, A plurality of bag clamping devices 5, annular track 2, control track 3, and annular conveying unit 4 are respectively installed on the frame 1, and all bag clamping devices 5 are movably installed on the annular track 2 along the annular track 2, and the annular conveying unit 4. Drive all the bag clamping devices 5 to move along the annular track 2, and control the track 3 to control the bag clamping devices 5 to unfold and close. When the bag clamping device 5 is unfolded, the mouth of the packaging bag clamped by the bag clamping device 5 can be closed, and when the bag clamping device 5 is closed, the bag mouth of the packaging bag clamped by the bag clamping device 5 can be opened.

In an optional embodiment, the endless conveying unit 4 includes an endless synchronous belt 401 and a synchronous belt driving mechanism 402. The annular synchronous belt 401 and the synchronous belt driving mechanism 402 are respectively installed on the frame 1, and the synchronous belt driving mechanism 402 drives the annular synchronous belt 401. The synchronous belt 401 moves, the annular synchronous belt 401 connects all the bag clamping devices 5, and the synchronous belt drive mechanism 402 drives the annular synchronous belt 401 to move, so that the annular synchronous belt 401 drives the bag clamping device 5 to move along the annular track 2, and the control track 3 controls the clamp The bag device 5 completes the unfolding and closing actions.

In an optional embodiment, the endless conveying unit adopts other similar transmission mechanisms capable of driving the bag clamping device 5 to move along the annular track 2 , such as the endless conveying unit 4 using a chain instead of the endless timing belt 401 .

In an alternative embodiment, the bag conveying mechanism is arranged vertically (for vertical packaging machines).

In an alternative embodiment, the packaging bag conveying mechanism is arranged horizontally (for a horizontal packaging machine).

In an optional embodiment, the synchronous belt drive 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, two The synchronous pulley 4027, the first motor 4021 is installed on the frame 1, the first driving wheel 4022 is installed on the first output shaft of the first motor 4021, the first rotating shaft 4025 and the second rotating shaft 4026 are respectively rotatably installed on the machine. On the frame 1, 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, and the two synchronous pulleys 4027 are respectively fixed on the first rotating shaft 4025. On the second rotating shaft 4026, 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 optional embodiment, the synchronous belt drive 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, and the first rotating shaft 4025, The second rotating shafts 4026 are respectively 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, and the annular synchronous belt 401 is sleeved on the two synchronous pulleys 4027, The fourth output shaft of the second motor is connected to the first rotating shaft 4025 . The second motor is a servo motor. The difference between this embodiment and the previous embodiment is that instead of using a belt drive mechanism, a servo motor is directly used to drive the first rotating shaft 4025 to rotate. It can also be considered to use a servo motor and a reduction box to drive the first rotating shaft 4025 to rotate.

In an optional embodiment, the packaging bag conveying mechanism further includes a track position adjustment mechanism 6, the track position adjustment mechanism 6 includes an adjustment mechanism drive unit 601, and two track adjustment units 602, and the adjustment mechanism drive unit 601 includes a fourth motor 6011. , reduction box 6012, second drive belt 6013, second driving pulley 6014, two second driven pulleys 6015, the number of second driven pulleys 6015 and the track adjustment unit 602 are the same and correspond one-to-one, the track adjustment unit 602 is installed on the rack 1, each second driven wheel 6015 is installed on the corresponding track adjustment unit 602, the fourth motor 6011 and the reduction box 6012 are respectively installed on the frame 1, the fourth motor 6011 is connected to the reduction box 6012, and the second driving wheel 6014 Installed on the output shaft of the reduction box 6012, the second transmission belt 6013 is sleeved on the second driving pulley 6014 and all the second driven pulleys 6015. In this embodiment, the fourth motor 6011 is a servo motor.

In an optional embodiment, the track adjusting unit 602 includes a lead screw 6021, a nut 6022, an adjusting plate 6023, and two adjusting rods 6024. The lead screw 6021 is rotatably installed on the frame 1, and the second driven wheel 6015 is fixed. On the screw rod 6021, the nut 6022 is sleeved on the screw rod 6021, and the adjusting plate 6023 is installed on the nut 6022.

In an optional embodiment, the track adjusting unit 602 further includes two first sliding sleeves 6025 . The number of the first sliding sleeves 6025 and the adjusting rods 6024 are the same and correspond one-to-one. The first sliding sleeves 6025 are installed on the rack 1 . , the adjusting rods 6024 pass through the corresponding first sliding sleeves 6025 respectively.

In an optional embodiment, the track adjusting unit 602 further includes a screw base 6026 , the screw base 6026 is mounted on the frame 1 , and the screw 6021 is rotatably mounted on the screw base 6026 .

In an optional embodiment, the track position adjustment mechanism 6 further includes two guide units 603. The guide unit 603 includes a guide rod 6031 and a second sliding sleeve 6032. The second sliding sleeve 6032 is installed on the rack 1. The guide rod One end of the 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 optional embodiment, the number of the track adjusting unit 602 is one, the adjusting mechanism driving unit 601 includes a third motor, and the third motor is connected to the lead screw 6021 . In this embodiment, the third motor is a servo motor. It can also be considered to use a servo motor and a reduction box to drive the screw 6021 to rotate.

In an optional embodiment, the packaging bag conveying mechanism further includes a protective side plate 7 , and the protective side plate 7 is installed on the frame through the installation column 8 .

In an optional embodiment, the bag clamping device 5 includes a mounting plate 501, two pocket opening clamping devices 502, a spring 503, and an opening and closing mechanism 504. The mounting plate 501 is slidably mounted on the annular track 2, and two The rear part of the bag opening clamping device 502 is hinged to the mounting plate 501 respectively; the two ends of the spring 503 are respectively connected to the middle part of the two bag opening clamping devices 502 and force the front ends of the two bag opening clamping devices 502 to move closer to each other. The opening and closing mechanism 504 includes a roller 5041 , the support seat 5042, the swing frame 5043, the joystick 5044, the triangle plate 5045, the swing rod 5046, the support seat 5042 is fixed on the bottom surface of the mounting plate 501, the middle part of the swing frame 5043 is hinged to the support seat 5042, and the roller 5041 is installed on the bottom end of the swing frame 5043, Both ends of the joystick 5044 are hinged to the top of the swing frame 5043 and the first end of the triangular plate 5045 respectively. , the other end of the swing rod 5046 is hinged with the third end of the triangular plate 5045 .

In this embodiment, the bag mouth clamping device 502 is a clamp which is driven by a cylinder to open and close. Referring to FIGS. 8-10 , the opening and closing of the clips of the bag opening clamping device 502 is driven by an air cylinder. The opening and clamping of the clips can be performed when the two bag opening clamping devices 502 are unfolded, or when the two bag opening clamping devices 502 are unfolded. when collapsed. Producers can choose according to actual needs.

In an optional 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 toward the direction away from the annular track 2 , as shown in FIG. 7 . In this way, the control rail 3 controls the bag clamping device 5 to close, so that the bag mouth of the packaging bag clamped by the bag clamping device 5 is opened so as to fill the material.

As shown in FIG. 11 , the vertical packaging machine made by using the packaging bag conveying mechanism of the present application includes not only the packaging bag conveying mechanism, but also the first packaging bag picking and placing along the top of the annular track 2 from left to right. Mechanism 9 , first filling mechanism 10 , first sealing mechanism 11 .

As shown in FIG. 12 , the horizontal packaging machine made of the packaging bag conveying mechanism of the present application includes not only the packaging bag conveying mechanism, but also the second packaging bag picking and placing along the outer side of the annular track 2 from left to right. Mechanism 12 , second filling mechanism 13 , second sealing mechanism 14 .

The working process of the packaging bag conveying mechanism of the above-mentioned annular bag-feeding packaging machine: let the bag clamping device move along a circular track and pass through each processing station in turn, and use the control track to control the unfolding and closing of the bag clamping device to achieve The bag mouth of the packaging bag clamped by the bag clamping device is opened and closed.

The bag clamping device is driven by the synchronous belt to move along the circular track.

The bag clamping device has a power driving unit, and the power driving unit drives the bag clamping device to move. The bag clamping device is like a trolley that can move along a circular track, but this solution is very expensive.

By adjusting the distance between the control rail and the annular rail, the bag clamping device can clamp packaging bags with different bag widths.

The packaging bag is a prefabricated bag, as shown in FIG. 13 . The prefabricated bag is a packaging bag customized in advance according to requirements, such as an organ bag, an eight-side sealing packaging bag, and the like. Since special equipment can be used to manufacture packaging bags with a structure that can meet the needs of storing materials, it is more able to meet the needs of storing materials than the packaging bags made immediately from traditional film rolls, especially large-volume solid materials. Such as large pieces of candy, toys, plastic bowls, cakes, etc.

In an optional embodiment, the annular bag-feeding packaging machine is a vertical packaging machine.

In an optional embodiment, the annular bag-feeding packaging machine is a horizontal packaging machine.

Compared with the traditional packaging machine (whether a continuous three-side sealing packaging bag or a prefabricated bag is made of roll film), the packaging bag conveying mechanism of the present application has a simple structure, few parts, and the bag width can be automatically adjusted, and the operation is stable and non-stop. Easy to damage, good versatility.

In addition, it should be noted that the names of each part of the specific embodiments described in this specification may be different, and any equivalent or simple changes made according to the structure, features and principles described in the patent concept of the present utility model shall be Included in the scope of protection of this utility model patent. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or replace them in similar ways, as long as they do not deviate from the structure of the present invention or go beyond the definitions defined in the claims. All should belong to the protection scope of the present invention.

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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