Plastic bag insertion clamping and opening device

Abstract

This utility model provides a bag clamping and opening device, belonging to the field of packaging equipment technology. It is used to clamp and release bags with the bag opening facing upwards. It includes a turntable clamping device and a bag opening mechanism. The turntable clamping device includes a turntable support, a rotary driver, a turntable, and four bag clamping mechanisms. The four bag clamping mechanisms are fixed at 90° intervals around the outer circumference of the turntable. The bag opening mechanism is located above the turntable and the four bag clamping mechanisms, and is fixed to the turntable support through the central hole of the turntable. The rotary driver can drive the turntable to rotate with the four bag clamping mechanisms to clamp the bags, open the bags for feeding, and release the bags with material. The bag opening mechanism can open the bag clamping mechanisms to allow them to clamp and release the bags with material.

Description

Technical Field

[0001] This utility model belongs to the field of packaging equipment technology, and in particular relates to a bag clamping and opening device for plastic bags. Background Technology

[0002] A leg pocket connector, with dimensions of Φ14.5×47(mm), smaller than a thumb and weighing 6g, is used in disposable drainage bags and belongs to the field of medical devices. The manufacturer uses a pull-tab transparent PE bag for packaging, with bag dimensions of 80×147(mm), and each bag contains 5 or 10 units.

[0003] Currently, leg pocket connectors are packaged manually, which is inefficient and causes pollution. To address this, we have developed an automatic bagging machine for leg pocket connectors, automating the bagging process.

[0004] To address this, we have developed a bag clamping and opening device for clamping and releasing plastic bags with the bag opening facing upwards. Utility Model Content

[0005] The purpose of this utility model is to provide a bag clamping and opening device for gripping and releasing bags with the bag opening facing upwards. It includes a turntable clamping device and a bag opening mechanism. The turntable clamping device comprises a turntable support, a rotary driver, a turntable, and four bag clamping mechanisms. The turntable support is fixed to an external machine base, the rotary driver is vertically fixed to the turntable support, and the turntable is horizontally fixed to the output end of the rotary driver. The turntable has a central hole. The four bag clamping mechanisms are fixed at 90° intervals around the outer circumference of the turntable. The bag opening mechanism is located above the turntable and the four bag clamping mechanisms, passing through the central hole and fixed to the turntable support. The rotary driver can drive the turntable to rotate with the four bag clamping mechanisms to grip, open, and release bags containing material. The bag opening mechanism allows the bag clamping mechanisms to grip and release bags containing material.

[0006] Furthermore, the bag clamping mechanism includes a mounting plate, a clamping slide block, two clamping units, a clamping tension spring, an auxiliary plate, a support assembly, and a support adjustment assembly;

[0007] The mounting plate is used to fix the outer periphery of the turntable. The slide rail of the clamping slide block is fixed to the bottom of the mounting plate in the left and right directions. The rear ends of the two clamping units are fixed to the slider of the clamping slide block for clamping the two sides of the plastic bag in the left and right directions. The clamping tension spring is fixed between the rear ends of the two clamping units. The auxiliary plate is fixed to the middle of the mounting plate in the front and back directions. The support assembly is fixed on the front side of the auxiliary plate. The support adjustment assembly is fixed on the large surface of the auxiliary plate near the support assembly. The plastic bag infeed clamping mechanism is used to clamp the plastic bag with the bag opening facing upward. The support assembly is used to open the two clamping units for clamping or releasing the plastic bag and to close the two clamping units to open the clamped plastic bag for feeding. The support adjustment assembly is used to move the support assembly under the drive of an external mechanism to open or close the two clamping units.

[0008] Furthermore, the clamping unit includes a clamping arm, a clamping arm pin, two release cranks, a release roller, a connecting rod pin, a connecting rod, a movable clamping palm connecting rod pin, a movable clamping palm, a movable clamping palm clamping arm pin, a clamping tension spring, a fixed clamping palm, a support roller bracket, and a support roller.

[0009] The clamping arm is fixed to the edge of the mounting plate in a front-to-back direction. Clamping arm pins pass through the clamping arm near the mounting plate. Two release cranks pass through the clamping arm pins on the upper and lower sides of the clamping arm, respectively. Release rollers are located on the inner ends of the release cranks above the clamping arm. Connecting rod pins pass through the outer ends of the two release cranks. The rear end of the connecting rod passes through the connecting rod pin between the two release cranks. The movable clamping palm connecting rod pin passes through the front end of the connecting rod. The outer part of the movable clamping palm passes through the upper and lower ends of the movable clamping palm connecting rod pin, located outside the front end of the connecting rod. The movable clamping palm clamping arm pin passes through the front end of the clamping arm and inside the movable clamping palm. The two ends of the clamping spring are fixed to the lower front end of the clamping arm and the rear end of the connecting rod, respectively. The fixed clamping palm is fixed to the inner side of the clamping arm. The clamping arm, release crank, connecting rod, and movable clamping palm constitute a planar hinge four-bar linkage. The clamping spring pulls the clamping arm and connecting rod together, allowing the movable clamping palm to close with the fixed clamping palm to clamp one side of the plastic bag. When the plastic bag opening mechanism pushes forward against the tension of the clamping spring, the release roller can pull the clamping arm and connecting rod apart, allowing the movable clamping palm to open with the fixed clamping palm to release one side of the plastic bag. The support roller bracket is fixed to the rear end of the clamping arm, and the support roller is fixed to the support roller bracket. The two support rollers of the two clamping units can move away under the push of the support assembly, pulling the two clamping units apart along the slide rail of the clamping slide block to clamp both sides of the plastic bag. The clamping spring can close the two clamping units when the support assembly is pushed back, causing the two sides of the plastic bag clamped by the two clamping units to shrink together and open the bag opening for feeding.

[0010] Furthermore, the support assembly includes a support slide block, a support support, a support compression spring, and a support slide hand. The support slide hand is provided with a support wedge finger at the upper end and a support slide hand sloping shoulder at the lower end.

[0011] The slide rail of the support slide block is vertically fixed on the front side of the auxiliary plate. The support support is fixed on the lower end of the front side of the auxiliary plate. The support slide hand is fixed on the slider of the support slide block. The support pressure spring is set between the support support and the support slide hand. Under the elastic force of the support pressure spring, the support wedge finger of the support slide hand rises and inserts between the two support rollers of the two clamping units, pushing the two support rollers away, thereby pulling the two clamping units apart along the slide rail of the clamping slide block to clamp the two sides of the plastic bag. Under the action of external force, the support slide hand can bring the support wedge finger down. Under the tension of the clamping spring, the two support rollers can approach each other, thereby closing the two clamping units and causing the two sides of the plastic bag clamped by the two clamping units to shrink and open the bag mouth for feeding.

[0012] Furthermore, the support adjustment assembly includes a support adjustment bracket, a support depth adjustment screw seat, a support adjustment arm pin, a support adjustment arm, a support adjustment roller, and a support depth adjustment screw;

[0013] The support adjustment bracket is fixed on the large surface of the auxiliary plate aligned with the support slide shoulder. The support depth adjustment screw seat is fixed on the side of the support adjustment bracket. The support adjustment arm pin passes through the middle of the support adjustment bracket in a left-right direction. The support adjustment arm passes through the support adjustment bracket in a front-back direction and passes through the support adjustment arm pin. The front end of the support adjustment arm rests on the support slide shoulder. The support adjustment roller is set on the rear end of the support adjustment arm. The support depth adjustment screw passes through the support depth adjustment screw seat. The lower end of the support depth adjustment screw located inside the support adjustment bracket can abut against the upper side of the support adjustment arm located in front of the support adjustment arm pin. The support adjustment roller can be pushed up by the external mechanism to lower the front end of the support adjustment arm, causing the support slide and support wedge finger to lower. The two support rollers are brought closer together under the tension of the clamping spring, thereby closing the two clamping units and causing the two clamping units to shrink and open the bag opening for material feeding.

[0014] Furthermore, the bag opening mechanism includes a bag opening support column, a bag opening base plate, two bag opening drivers, and two bag opening pushers. The bag opening support column is vertically fixed to the top surface of the turntable support through the turntable's central hole. The bag opening base plate is horizontally fixed to the top of the bag opening support column. The two bag opening drivers are horizontally fixed to the bag opening base plate. The output ends of the two bag opening drivers move perpendicularly to each other and face outward from the turntable. The two bag opening pushers are fixed to the output ends of the bag opening drivers and are located outside the turntable. The bag opening drivers are used to drive the bag opening pushers and simultaneously push the two release rollers of the two clamping units to open the two movable clamping hands and the two fixed clamping hands of the two clamping units to release the bag.

[0015] The advantages of a plastic bag clamping and opening device are as follows:

[0016] Four bag-feeding clamping mechanisms are fixed at 90° intervals around the outer circumference of the turntable. The bag-opening clamping mechanism is located above the turntable and the four bag-feeding clamping mechanisms, passing through the center hole of the turntable and fixed to the turntable support. The rotary driver can drive the turntable to rotate with the four bag-feeding clamping mechanisms to clamp bags, open bags for feeding, and release bags with material. The bag-opening clamping mechanism can open the bag-feeding clamping mechanisms to clamp bags and release bags with material. Attached Figure Description

[0017] Figure 1 Structural diagram of the bag clamping and opening device for plastic bags;

[0018] Figure 2 Structural diagram of the turntable clamping device;

[0019] Figure 3 Structural diagram of the plastic bag clamping mechanism;

[0020] Figure 4 Structural diagram of the plastic bag opening mechanism.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1000. Turntable clamping device;

[0023] 2000, Plastic bag opening mechanism;

[0024] 1000 Turntable clamping device; 1100 Turntable support; 1200 Rotary drive; 1300 Turntable; 1310 Turntable center hole; 1400 Plastic bag infeeding clamping mechanism;

[0025] 1400. Bag clamping mechanism; 1410. Mounting plate; 1420. Clamping slide block;

[0026] 1430. Clamping unit; 1431. Clamping arm; 1432. Clamping arm pin; 1433. Release crank; 1434. Release roller; 1435. Connecting rod pin; 1436. Connecting rod; 1437. Movable clamping palm connecting rod pin; 1438. Movable clamping palm; 1439. Movable clamping palm clamping arm pin; 143B. Clamping tension spring; 143C. Fixed clamping palm; 143E. Support roller bracket; 143F. Support roller;

[0027] 1440. Clamping tension spring;

[0028] 1450, auxiliary board;

[0029] 1460. Support assembly; 1461. Support slide; 1462. Support bracket; 1463. Support compression spring; 1464. Support skater; 14641. Support wedge finger; 14642. Support skater shoulder slope;

[0030] 1470. Support and adjustment assembly; 1471. Support and adjustment bracket; 1472. Support depth adjustment screw seat; 1473. Support adjustment arm pin; 1474. Support adjustment arm; 1475. Support adjustment roller; 1476. Support depth adjustment screw;

[0031] 2000, Plastic bag opening mechanism; 2100, Plastic bag opening support column; 2200, Plastic bag opening base plate; 2300, Plastic bag opening driver; 2400, Plastic bag opening pusher. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0033] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly, for example, used to refer to a fixed connection, as well as a detachable connection, or an integral connection; used to refer to a direct connection, as well as an indirect connection through an intermediate medium, and used to refer to the internal communication of two components. For those skilled in the art, the specific meaning of the terms in this utility model is understood according to the specific circumstances.

[0034] See Figure 1 and Figure 2This embodiment provides a bag clamping and opening device for gripping and releasing plastic bags with the bag opening facing upwards. It includes a turntable clamping device 1000 and a bag opening mechanism 2000. The turntable clamping device 1000 includes a turntable support 1100, a rotary driver 1200, a turntable 1300, and four bag clamping mechanisms 1400. The turntable support 1100 is fixed to an external machine base, the rotary driver 1200 is vertically fixed to the turntable support 1100, and the turntable 1300 is horizontally fixed to the output end of the rotary driver 1200. The turntable 1300 has a turntable center hole 1310 for holding four plastic bags. The bag-feeding clamping mechanism 1400 is fixed at 90° intervals around the outer periphery of the turntable 1300. The bag opening clamping mechanism 2000 is located above the turntable 1300 and the four bag-feeding clamping mechanisms 1400, and is fixed to the turntable bracket 1100 through the turntable center hole 1310. The rotary driver 1200 can drive the turntable 1300 to rotate with the four bag-feeding clamping mechanisms 1400 to clamp the bags, open the bags for feeding, and release the bags with material. The bag opening clamping mechanism 2000 is used to open the bag-feeding clamping mechanism 1400 to allow the bag-feeding clamping mechanism 1400 to clamp the bags and release the bags with material.

[0035] Further, see Figure 3 The plastic bag clamping mechanism 1400 includes a mounting plate 1410, a clamping slide block 1420, two clamping units 1430, a clamping tension spring 1440, an auxiliary plate 1450, a support assembly 1460, and a support adjustment assembly 1470.

[0036] Mounting plate 1410 is used to fix to the lower outer periphery of turntable 1300. The slide rail of clamping slide block 1420 is fixed to the lower part of mounting plate 1410 in the left and right direction. The rear ends of two clamping units 1430 are fixed to the slider of clamping slide block 1420 for clamping the two sides of the plastic bag in the left and right direction. Clamping tension spring 1440 is fixed between the rear ends of the two clamping units 1430. Auxiliary plate 1450 is fixed to the lower part of the middle of mounting plate 1410 in the front and back direction. Support assembly 1460 is fixed to the front side of auxiliary plate 1450. The holding adjustment component 1470 is fixed on the large surface of the auxiliary plate 1450 near the support component 1460. The plastic bag infeed clamping mechanism 1400 is used to clamp the plastic bag with the bag opening facing upward. The support component 1460 is used to open the two clamping units 1430 for clamping or releasing the plastic bag, and to close the two clamping units 1430 to open the clamped plastic bag for feeding. The support adjustment component 1470 is used to move the support component 1460 under the drive of an external mechanism to open or close the two clamping units 1430.

[0037] Furthermore, see Figure 3The clamping unit 1430 includes a clamping arm 1431, a clamping arm pin 1432, two release cranks 1433, a release roller 1434, a connecting rod pin 1435, a connecting rod 1436, a movable clamping palm connecting rod pin 1437, a movable clamping palm 1438, a movable clamping palm clamping arm pin 1439, a clamping tension spring 143B, a fixed clamping palm 143C, a support roller bracket 143E, and a support roller 143F.

[0038] The clamping arm 1431 is fixed to the side of the mounting plate 1410 in a front-to-back direction. The clamping arm pin 1432 passes through the clamping arm 1431 near the mounting plate 1410. Two release cranks 1433 are respectively passed through the clamping arm pin 1432 and located on the upper and lower sides of the clamping arm 1431. The release roller 1434 is located on the inner end of the release crank 1433 and above the clamping arm 1431. The connecting rod pin 1435 passes through the outer ends of the two release cranks 1433. The rear end of the connecting rod 1436 passes through the connecting rod pin 1435 and is located on the two release cranks. Between the crank 1433 and the connecting rod pin 1437, the movable clamping palm 1438 is inserted through the front end of the connecting rod 1436. The outer part of the movable clamping palm 1438 is inserted through the upper and lower ends of the connecting rod pin 1437, located outside the front end of the connecting rod 1436. The clamping palm arm pin 1439 is inserted through the front end of the clamping arm 1431 and through the inner part of the movable clamping palm 1438. The two ends of the clamping spring 143B are fixed to the lower front end of the clamping arm 1431 and the rear end of the connecting rod 1436, respectively. The fixed clamping palm 143C is fixed to the inner side of the clamping arm 1431. The clamping arm 1431, the release crank 1433, the connecting rod 1436, and the movable clamping palm 1438 constitute a planar hinge four-bar mechanism. The clamping spring 143B pulls the clamping arm 1431 and the connecting rod 1436 together, so that the movable clamping palm 1438 can close with the fixed clamping palm 143C to clamp one side of the plastic bag. When the plastic bag opening mechanism 2000 pushes forward against the tension of the clamping spring 143B, the release roller 1434 can pull the clamping arm 1431 and the connecting rod 1436 apart, so that the movable clamping palm 1438 and the fixed clamping palm 143C can open to release one side of the plastic bag. The support roller bracket 143E is fixed to the lower rear end of the clamping arm 1431, and the support roller 143F is fixed to the support roller bracket 143E. The two support rollers 143F of the two clamping units 1430 can move away under the push of the support assembly 1460, and pull the two clamping units 1430 apart along the slide rail of the clamping slide block 1420 to clamp the two sides of the plastic bag. The clamping tension spring 1440 can close the two clamping units 1430 when the support assembly 1460 is pushed back, so that the two sides of the plastic bag clamped by the two clamping units 1430 shrink closer and open the bag mouth for feeding.

[0039] Furthermore, see Figure 3The support assembly 1460 includes a support slide 1461, a support support 1462, a support compression spring 1463, and a support slide 1464. The support slide 1464 is provided with a support wedge finger 14641 at the upper end and a support slide shoulder 14642 at the lower end.

[0040] The slide rail of the support slide block 1461 is vertically fixed to the front side of the auxiliary plate 1450. The support support 1462 is fixed to the lower end of the front side of the auxiliary plate 1450. The support slider 1464 is fixed to the slider of the support slide block 1461. The support compression spring 1463 is disposed between the support support 1462 and the support slider 1464. Under the elastic force of the support compression spring 1463, the support wedge finger 14641 of the support slider 1464 rises and inserts into the two supports of the two clamping units 1430. Between the holding rollers 143F, push the two supporting rollers 143F away, thereby pulling the two clamping units 1430 apart along the slide rail of the clamping slide block 1420 to clamp the two sides of the plastic bag. Under the action of external force, the supporting slide 1464 can bring the supporting wedge finger 14641 down. Under the action of the clamping tension spring 1440, the two supporting rollers 143F can come closer together, thereby closing the two clamping units 1430, so that the two sides of the plastic bag clamped by the two clamping units 1430 shrink and open the bag mouth for feeding.

[0041] Furthermore, see Figure 3 The support adjustment assembly 1470 includes a support adjustment support 1471, a support depth adjustment screw seat 1472, a support adjustment arm pin 1473, a support adjustment arm 1474, a support adjustment roller 1475, and a support depth adjustment screw 1476.

[0042] The support adjustment bracket 1471 is fixed to the auxiliary plate 1450, aligned with the large surface of the support for the sliding hand shoulder 14642. The support depth adjustment screw seat 1472 is fixed to the side of the support adjustment bracket 1471. The support adjustment arm pin 1473 is inserted horizontally through the middle of the support adjustment bracket 1471. The support adjustment arm 1474 is inserted front-back through the support adjustment bracket 1471 and outside the support adjustment arm pin 1473. The front end of the support adjustment arm 1474 rests on the support for the sliding hand shoulder 14642. The support adjustment roller 1475 is located on the rear end of the support adjustment arm 1474. The support depth adjustment screw 1476 passes through the support adjustment rod. On the support depth adjustment screw seat 1472, the lower end of the support depth adjustment screw 1476 located inside the support adjustment support 1471 can abut against the upper side of the support adjustment arm 1474 located in front of the support adjustment arm pin 1473; the support adjustment roller 1475 can be pushed up by the external mechanism, causing the front end of the support adjustment arm 1474 to descend, causing the support slide 1464 to descend with the support wedge finger 14641, and the two support rollers 143F can approach each other under the pulling force of the clamping spring 1440, thereby closing the two clamping units 1430, causing the two clamping units 1430 to shrink and open the bag opening on both sides to feed material.

[0043] Further, see Figure 3 The plastic bag opening mechanism 2000 includes a plastic bag opening support column 2100, a plastic bag opening base plate 2200, two plastic bag opening actuators 2300, and two plastic bag opening pushers 2400. The plastic bag opening support column 2100 is vertically fixed to the top surface of the turntable support 1100 through the turntable center hole 1310 of the turntable 1300. The plastic bag opening base plate 2200 is horizontally fixed to the top of the plastic bag opening support column 2100. The two plastic bag opening actuators 2300 are horizontally fixed to the plastic bag opening base plate 2200. The output ends of the bag opening clamp driver 2300 move perpendicularly to each other and face outwards from the turntable 1300. The two bag opening clamp pushers 2400 are fixed on the output ends of the bag opening clamp driver 2300 and located outside the outer periphery of the turntable 1300. The bag opening clamp driver 2300 is used to drive the bag opening clamp pushers 2400 to push the two release rollers 1434 of the two clamping units 1430 to open the two movable clamps 1438 and the two fixed clamps 143C of the two clamping units 1430 to release the bag.

[0044] The specific implementation process is as follows:

[0045] Taking over and releasing the plastic bag:

[0046] When the bag is picked up, the bag opening driver 2300 of the bag opening mechanism 2000 drives the bag opening pusher 2400 to extend and push the release rollers 1434 of the two clamping units 1430 of the bag insertion clamping mechanism 1400 forward, which drives the release crank 1433 to pull the connecting rod 1436 backward. The connecting rod 1436 pulls the movable clamp 1438 to separate from the fixed clamp 143C, releasing the clamp and creating a clamping opening. The clamping spring 143B is stretched and lengthened. The plastic bag enters the clamping openings of the movable clamp 1438 and the fixed clamp 143C on both sides, and the clamping openings of the fixed clamp 143C are attached to the fixed clamping pad 143D of the fixed clamp 143C. Then, the plastic bag opening clamping driver 2300 drives the plastic bag opening clamping pusher 2400 to retract. The clamping spring 143B of the clamping unit 1430 retracts and pulls back the release crank 1433, which pulls the connecting rod 1436 forward. The connecting rod 1436 pulls the movable clamp 1438 and the fixed clamp 143C to close and clamp the plastic bag.

[0047] When the plastic bag is released, the plastic bag opening clamping driver 2300 of the plastic bag opening clamping mechanism 2000 drives the plastic bag opening clamping pusher 2400 to extend and push the release rollers 1434 of the two clamping units 1430 of the plastic bag insertion clamping mechanism 1400 to move forward, which drives the release crank 1433 to pull the connecting rod 1436 backward. The connecting rod 1436 pulls the movable clamping palm 1438 to separate from the fixed clamping palm 143C and release the plastic bag. The clamping spring 143B is stretched and lengthened.

[0048] The lateral width setting for the plastic bag clamp and the opening of the clamped plastic bag: The support depth adjustment screw 1476 presses down on the support adjustment arm 1474, which in turn presses down on the support slide shoulder 14642 of the support slide 1464, causing the support wedge finger 14641 to insert between the support rollers 143F of the two clamping units 1430 to a preset depth. External force pushes up the support adjustment roller 1475, causing the support adjustment arm 1474 to press down on the end away from the support adjustment roller 1475, which in turn causes the support slide shoulder 14642 of the support slide 1464 to lower the support wedge finger 14641, thus inserting it between the two clamping units 1430. The depth between the two support rollers 143F of the clamping unit 1430 decreases until the support wedge finger 14641 completely disengages from between the support rollers 143F. The distance between the two support rollers 143F decreases until it reaches zero under the tension of the clamping spring 1440. The distance between the two clamping arms 1431 decreases to its minimum. The two clamping arms 1431 of the two clamping units 1430 are opened to a preset distance, which can meet the clamping needs of plastic bags of different widths. The two clamping units 1430 clamp the two sides of the plastic bag and close them in the middle to open the bag opening for filling.

[0049] The turntable clamping device 1000 rotates to feed the plastic bags: the rotary driver 1200 drives the turntable 1300 to carry four plastic bags into the bag clamping mechanism 1400, which circulates between the upper and lower plastic bag positions and the working positions such as the bagging and weighing positions.

[0050] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bag clamping and opening device for gripping and releasing a plastic bag with the bag opening facing upwards, comprising a turntable clamping device (1000) and a bag opening mechanism (2000), wherein the turntable clamping device (1000) comprises a turntable support (1100), a rotary driver (1200), a turntable (1300), and four bag opening clamping mechanisms (1400); the turntable support (1100) is fixed on an external machine base, the rotary driver (1200) is vertically fixed on the turntable support (1100), the turntable (1300) is horizontally fixed on the output end of the rotary driver (1200), the turntable (1300) is provided with a turntable center hole (1310), and the four bag opening clamping mechanisms... The structure (1400) is fixed at 90° intervals around the outer periphery of the turntable (1300). The bag opening and clamping mechanism (2000) is located above the turntable (1300) and the four bag infeeding clamping mechanisms (1400), and is fixed to the turntable bracket (1100) through the central hole (1310) of the turntable. The rotary driver (1200) is used to drive the turntable (1300) to rotate with the four bag infeeding clamping mechanisms (1400) to clamp the bag, open the bag for feeding, and release the bag with material. The bag opening and clamping mechanism (2000) is used to open the bag infeeding clamping mechanism (1400) to allow the bag infeeding clamping mechanism (1400) to clamp the bag and release the bag with material.

2. The bag insertion clamping and opening device according to claim 1, wherein the bag insertion clamping mechanism (1400) includes a mounting plate (1410), a clamping slide block (1420), two clamping units (1430), a clamping tension spring (1440), an auxiliary plate (1450), a support assembly (1460), and a support adjustment assembly (1470); The mounting plate (1410) is fixed to the lower outer periphery of the turntable (1300). The slide rail of the clamping slide block (1420) is fixed to the mounting plate (1410) in the left and right directions. The rear ends of the two clamping units (1430) are fixed to the slider of the clamping slide block (1420) for clamping the two sides of the plastic bag in the left and right directions. The clamping tension spring (1440) is fixed between the rear ends of the two clamping units (1430). The auxiliary plate (1450) is fixed to the lower middle part of the mounting plate (1410) in the front and back directions. The support assembly (1460) is fixed to the front side of the auxiliary plate (1450). On the surface; the support adjustment assembly (1470) is fixed on the large surface of the auxiliary plate (1450) near the support assembly (1460), the plastic bag infeed clamping mechanism (1400) is used to clamp the plastic bag with the bag opening facing upward, the support assembly (1460) is used to open the two clamping units (1430) for clamping or releasing the plastic bag, and to close the two clamping units (1430) to open the clamped plastic bag for feeding, the support adjustment assembly (1470) is used to make the support assembly (1460) move under the drive of an external mechanism to open or close the two clamping units (1430).

3. The bag clamping and opening device according to claim 2, wherein the clamping unit (1430) includes a clamping arm (1431), a clamping arm pin (1432), two release cranks (1433), a release roller (1434), a connecting rod pin (1435), a connecting rod (1436), a movable clamping palm connecting rod pin (1437), a movable clamping palm (1438), a movable clamping palm clamping arm pin (1439), a clamping tension spring (143B), a fixed clamping palm (143C), a support roller bracket (143E), and a support roller (143F); The clamping arm (1431) is fixed to the side of the mounting plate (1410) in a front-to-back direction. The clamping arm pin (1432) passes through the clamping arm (1431) near the mounting plate (1410) in a vertical position. Two release cranks (1433) are respectively passed through the clamping arm pin (1432) and located on the upper and lower sides of the clamping arm (1431). The release roller (1434) is located on the inner end of the release crank (1433) and located above the clamping arm (1431). The connecting rod pin (1435) passes through the outer ends of the two release cranks (1433) in a vertical position. The rear end of the connecting rod (1436) passes through the connecting rod pin (1435) and is located on the two sides. Between the aforementioned release cranks (1433), the movable clamping link pin (1437) passes through the front end of the connecting rod (1436), the outer side of the movable clamping hand (1438) passes through the upper and lower ends of the movable clamping link pin (1437) located outside the front end of the connecting rod (1436), the movable clamping hand arm pin (1439) passes through the front end of the clamping arm (1431) and passes through the inner side of the movable clamping hand (1438), the two ends of the clamping tension spring (143B) are respectively fixed to the lower front end of the clamping arm (1431) and the rear end of the connecting rod (1436), and the fixed clamping hand (143C) is fixed to the inner side of the clamping arm (1431). The clamping arm (1431), the release crank (1433), the connecting rod (1436), and the movable clamping palm (1438) constitute a planar hinge four-bar linkage. The clamping spring (143B) pulls the clamping arm (1431) and the connecting rod (1436) together, allowing the movable clamping palm (1438) to close with the fixed clamping palm (143C) to clamp one side of the plastic bag. When the plastic bag opening mechanism (2000) pushes forward against the tension of the clamping spring (143B), the release roller (1434) can pull apart the clamping arm (1431) and the connecting rod (1436), allowing the movable clamping palm (1438) to open with the fixed clamping palm (143C) to release the bag. One side of the plastic bag; the support roller bracket (143E) is fixed to the rear end of the clamping arm (1431), and the support roller (143F) is fixed on the support roller bracket (143E); the two support rollers (143F) of the two clamping units (1430) can move away under the push of the support assembly (1460), and pull the two clamping units (1430) apart along the slide rail of the clamping slide block (1420) to clamp the two sides of the plastic bag; the clamping tension spring (1440) can close the two clamping units (1430) when the support assembly (1460) is pushed away, so that the two sides of the plastic bag clamped by the two clamping units (1430) shrink and open the bag opening for feeding.

4. The bag clamping and opening device according to claim 3, wherein the support assembly (1460) includes a support slide (1461), a support support (1462), a support compression spring (1463), and a support slide (1464), wherein the support slide (1464) is provided with a support wedge finger (14641) at the upper end and a support slide shoulder (14642) at the lower end; The slide rail of the support slide assembly (1461) is vertically fixed on the front side of the auxiliary plate (1450). The support support (1462) is fixed on the lower end of the front side of the auxiliary plate (1450). The support slider (1464) is fixed on the slider of the support slide assembly (1461). The support compression spring (1463) is disposed between the support support (1462) and the support slider (1464). The support wedge finger (14641) of the support slider (1464) rises and inserts into the two clamping units (143) under the elastic force of the support compression spring (1463). Between the two supporting rollers (143F) of 0), the two supporting rollers (143F) are pushed away, thereby pulling the two clamping units (1430) apart along the slide rail of the clamping slide block (1420) to clamp the two sides of the plastic bag. The supporting slide (1464) can bring the supporting wedge finger (14641) down under the action of external force. Under the pulling force of the clamping tension spring (1440), the two supporting rollers (143F) can come closer together, thereby closing the two clamping units (1430) so that the two sides of the plastic bag clamped by the two clamping units (1430) shrink and open the bag opening for feeding.

5. The bag clamping and opening device according to claim 4, wherein the support adjustment assembly (1470) includes a support adjustment support (1471), a support depth adjustment screw seat (1472), a support adjustment arm pin (1473), a support adjustment arm (1474), a support adjustment roller (1475), and a support depth adjustment screw (1476); The support adjustment bracket (1471) is fixed to the auxiliary plate (1450) on the large surface of the support for the sliding shoulder (14642). The support depth adjustment screw seat (1472) is fixed to the side of the support adjustment bracket (1471). The support adjustment arm pin (1473) passes through the middle of the support adjustment bracket (1471) in a left-right direction. The support adjustment arm (1474) passes through the support adjustment bracket (1471) in a front-back direction and passes through the support adjustment arm pin (1473). The front end of the support adjustment arm (1474) rests on the support for the sliding shoulder (14642). The support adjustment roller (1475) is set on the rear end of the support adjustment arm (1474). The support depth adjustment screw (1475) is fixed to the side surface of the support adjustment bracket (1471). 6) The lower end of the support depth adjusting screw (1476) located inside the support adjusting support (1471) can be pushed against the upper side of the support adjusting arm (1474) located in front of the support adjusting arm pin (1473) by the support adjusting roller (1475) pushed by the external mechanism, so that the support sliding hand (1464) and the support wedge finger (14641) can be lowered. The two support rollers (143F) can be brought closer together under the pulling force of the clamping spring (1440) so that the two clamping units (1430) are closed, and the two clamping units (1430) clamp the plastic bag on both sides of the bag opening to allow material to be fed in.

6. The bag clamping and opening device according to claim 3, wherein the bag opening mechanism (2000) comprises a bag opening support column (2100), a bag opening base plate (2200), two bag opening drivers (2300), and two bag opening pushers (2400); the bag opening support column (2100) passes through the turntable center hole (1310) of the turntable (1300) and is vertically fixed to the top surface of the turntable support (1100); the bag opening base plate (2200) is horizontally fixed to the top of the bag opening support column (2100); and the two bag opening drivers (2300) are horizontally fixed to the bottom surface of the bag opening base plate (2400). On 2200), the output ends of the two bag opening clamping drivers (2300) are perpendicular to each other and face outward from the turntable (1300). The two bag opening clamping pushers (2400) are fixed on the output ends of the bag opening clamping drivers (2300) and located outside the outer periphery of the turntable (1300). The bag opening clamping drivers (2300) are used to drive the bag opening clamping pushers (2400) to push the two release rollers (1434) of the two clamping units (1430) to open the two movable clamping palms (1438) and the two fixed clamping palms (143C) of the two clamping units (1430) to release the bag.

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