A bag clamping device for feeding

Abstract

The utility model belongs to the technical field of mechanical structure, and specifically relates to a bag-feeding and bag-clamping device, including a lifting guide mechanism, a weighing mechanism and a bag-clamping and opening mechanism. The weighing mechanism includes a sensor base and a plurality of weighing sensors; the sensor base is mounted on the lifting guide mechanism, and all the weighing sensors are fixedly mounted on the sensor base. The bag-clamping and opening mechanism includes a bag-opening plate base and two bag-clamping units with the same structure, and the two bag-clamping units are symmetrically arranged at the bottom of the bag-opening plate base and movably connected to the bag-opening plate base; the bag-opening plate base is fixedly connected to all the weighing sensors, and a material-feeding port is provided on the bag-opening plate base. The technical solution implements real-time weighing by setting a weighing mechanism, and provides lifting conditions by setting a lifting guide mechanism, so as to realize the control of the material-feeding height, which is conducive to the accurate weighing of the weighing mechanism. The weighing mechanism and the lifting guide mechanism cooperate with each other to realize high-precision control of the packaging weight.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical structures, and in particular relates to a material feeding and bag clamping device. Background Art

[0002] Packaging bags refer to bags used to package various supplies, which make the goods convenient to transport and store during the production and circulation process. They are widely used in daily life and industrial production. There are many types of packaging bags used for packaging granular materials and powder materials. When using ordinary packaging bags for packaging, the bag clamp clamps the packaging bag to complete the material feeding. After the material feeding is completed, the bag support rods on both sides of the bag clamp are pre-extended into the bag opening to apply force to expand the bag opening, and then sent to the bag pushing device for subsequent processes to fold and sew the packaging bag.

[0003] Most of the existing bagging devices, such as a bentonite rapid bagging device disclosed in the Chinese patent document with publication number CN204726729U, include a material bin, a material discharging port at the lower end of the material bin is connected to a material discharging barrel, a fixed frame is installed on each side of the material discharging barrel, a bracket is fixedly installed below the fixed frame, a cylinder is connected to the bottom of the bracket, a piston rod is arranged on the cylinder, a pressure block is fixed on the end face of the piston rod, an annular concave block is fixed at the bottom of the material discharging barrel, and the annular concave block is closely matched with the pressure block, a motor is installed between the fixed frame on one side of the material discharging barrel and the cylinder, a rotating shaft is rotatably installed in the material discharging barrel, an impeller is installed on the rotating shaft, one end of the rotating shaft extends out of the material discharging barrel and is connected to the motor transmission. The straight barrel design of the material discharging barrel in the prior art requires manual bagging, which is inconvenient to use.

[0004] In this regard, the Chinese patent document with the publication number CN216943820U in the prior art discloses an external clamping type wide range bag clamping mechanism, including a fixed welding assembly, the front and rear positions of the right side of the fixed welding assembly are fixedly connected with a fixed bearing, the fixed bearing is rotatably connected with a bag clamping plate through-shaft and the bag clamping plate through-shaft passes through and is fixedly connected with the bag clamping plate, the long support shaft is fixedly connected with a joint bearing, the rotating connecting rod shaft is rotatably connected with a motor drive shaft, the motor drive shaft is fixedly connected with a motor reducer, the fixed welding assembly is rotatably connected with an adjustment nut, and the front and rear bottom positions of the bag clamping plate are provided with a bag clamping rubber plate. In the utility model, a detection sheet is fixedly connected in front of the rotating connecting rod shaft, and detection switches are fixedly connected on both sides of the motor reducer, so that accurate calculation is achieved while being easy to operate, semi-automatic, and the width can be adjusted to diversify the models in the bag clamping process, thereby improving the efficiency of machine use and reducing costs. The prior art can realize automatic bag opening through the structural design of the bag clamping plate, but the prior art still has the following defects:

[0005] 1. When bagging, it is impossible to judge whether the bag is in place, which may result in no bag, or the material is unloaded when only one side of the bag is clamped, and the material is scattered all over the floor;

[0006] 2. Unable to weigh in real time, resulting in the inability to accurately control the material feeding speed, and thus the inability to accurately control the product weight. Summary of the invention

[0007] The purpose of this utility model is to address the deficiencies of the above-mentioned prior art and propose a bag-feeding clamping device, which controls the motor speed by real-time feedback of the weight of the material in the bag through a weighing sensor, thereby controlling the packaging weight. The four air pressure detection joints are used to determine whether the four corners of the bag are in place, and control the material feeding mechanism to feed the material. The details are as follows:

[0008] A bag-unloading and bag-clamping device, characterized in that it comprises a lifting guide mechanism, a weighing mechanism and a bag-clamping and opening mechanism. The weighing mechanism comprises a sensor base and a plurality of weighing sensors; the sensor base is mounted on the lifting guide mechanism, and all the weighing sensors are fixedly mounted on the sensor base. The bag-clamping and opening mechanism comprises a bag-opening plate base and two bag-clamping units of the same structure, and the two bag-clamping units are symmetrically arranged at the bottom of the bag-opening plate base and movably connected to the bag-opening plate base; the bag-opening plate base is fixedly connected to all the weighing sensors, and a material-unloading opening is provided on the bag-opening plate base.

[0009] Preferably, the lifting guide mechanism comprises a fixed plate, a slide assembly and two guide columns parallel to each other, the two guide columns are relatively fixed by the fixed plate, and the slide assembly is slidably engaged with the two guide columns.

[0010] Preferably, the slide assembly includes a mounting plate for mounting the bag opening plate base, and at least four snap-in wheel assemblies are mounted on the mounting plate. All snap-in wheel assemblies are arranged in two rows, and the two rows of snap-in wheel assemblies are respectively snap-connected to the two guide columns.

[0011] Preferably, the bag clamping unit comprises a bag opening plate, a plate opening cylinder, a bag clamping plate, a bag clamping cylinder and a linkage assembly. The linkage assembly is fixedly mounted on the bag clamping plate, and the bag clamping plate is fixedly connected to the linkage assembly. A cylinder seat extends from the side of the bag opening plate base; the sleeve of the plate opening cylinder is hinged to the cylinder seat, and the telescopic shaft of the plate opening cylinder is hinged to the linkage assembly to control the opening and closing of the bag opening plate through the actuation of the telescopic shaft. The sleeve and the telescopic shaft of the bag clamping cylinder are respectively hinged to the linkage assembly to control the bag clamping plate to approach and move away from the bag plate through the actuation of the telescopic shaft in cooperation with the linkage assembly.

[0012] Preferably, the linkage assembly includes a fixed base and two Y-shaped linkage plates, and the Y-shaped linkage plate includes a tail connection end and two head connection ends. The fixed base is fixedly connected to the bag clamping plate, and the sleeve of the plate opening cylinder and the telescopic rod of the bag clamping cylinder are respectively hinged to the fixed base. The two Y-shaped linkage plates are symmetrically arranged face to face, and the tail connection end of the Y-shaped linkage plate is hinged to the fixed base, one head connection end of the Y-shaped linkage plate is hinged to the telescopic shaft of the plate opening cylinder, and the other head connection end is fixedly connected to the bag clamping plate.

[0013] Preferably, bag clamping detection switches are respectively installed near both ends of the bag clamping plate, and avoidance grooves corresponding to the bag clamping detection switches are opened on the bag clamping plate.

[0014] Preferably, the bag clamping detection switch is a contact sensor.

[0015] Preferably, the bag opening plate comprises a back plate and two side plates which are integrally arranged, and the side plates are provided with closed bevel edges.

[0016] The technical solutions adopted to achieve the above purpose are as follows:

[0017] Beneficial effects of the utility model:

[0018] 1. The present technical solution proposes a bag-feeding device, which implements real-time weighing by setting a weighing mechanism to provide a basis for controlling the material feeding, and provides lifting conditions by setting a lifting guide mechanism to achieve the control of the material feeding height, which not only reduces the generation of dust, but also facilitates the accurate weighing of the weighing mechanism. In this way, the weighing mechanism and the lifting guide mechanism cooperate with each other to achieve high-precision control of the packaging weight.

[0019] 2. In this technical solution, the bag opening plates in the two bag clamping mechanisms are provided with closed bevels, which can realize the closure of the two bag opening plates. The two bag opening plates after closure form an acute angle structure, which is convenient for bagging. On this basis, with the external bag feeding mechanism, unmanned fully automated bagging can be realized.

[0020] 3. In the bag clamping unit of the present technical solution, the linkage between the bag opening plate, the plate opening cylinder, the bag clamping plate, the bag clamping cylinder and the bag opening plate base is realized by setting a linkage component. The structural design is ingenious and easy to control. The bag opening and bag clamping operations can be automatically realized by controlling the actuation of the plate opening cylinder and the bag clamping cylinder.

[0021] 4. This technical solution realizes multi-directional bagging detection of packaging bags by arranging bag clamping detection switches to ensure successful bagging of packaging bags and avoid material spillage due to inadequate bagging. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the axial structure of a bag-feeding and bag-clamping device of the technical solution;

[0023] Figure 2 This is a front structural schematic diagram of a bag-feeding and bag-clamping device of the technical solution;

[0024] Figure 3 This is a side structural schematic diagram of a material unloading and bag clamping device of the present technical solution.

[0025] in:

[0026] 1. Sensor base; 2. Weighing sensor; 3. Bag opening plate base; 4. Feeding port; 5. Fixed plate; 6. Guide column; 7. Mounting plate; 8. Snap-on wheel assembly; 9. Bag opening plate; 9.1. Back plate; 9.2. Side plate; 9.3. Closed bevel; 10. Plate opening cylinder; 11. Bag clamping plate; 12. Bag clamping cylinder; 13. Fixed base; 14. Y-type linkage plate; 15. Bag clamping detection switch; 16. Avoidance groove; 17. Cylinder seat. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments.

[0028] Therefore, the following detailed description of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "fitting", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Example 1

[0032] This embodiment discloses a bag clamping device for feeding materials, as a basic implementation method of this technical solution, such as Figure 1 As shown, it includes a lifting and guiding mechanism, a weighing mechanism and a bag clamping and opening mechanism.

[0033] The weighing mechanism includes a sensor base 1 and a plurality of weighing sensors 2. The sensor base 1 is installed on the lifting guide mechanism. In this structure, the sensor base 1 is not only used to install the weighing sensor 2, but also increases the distance between the bag clamping opening mechanism and the lifting guide mechanism, which is convenient for assembly with other equipment (such as the bag feeding mechanism) and bagging.

[0034] All weighing sensors 2 are fixedly mounted on the sensor base 1. The number of weighing sensors 2 can be one or more. The purpose of setting multiple weighing sensors 2 is to increase the rigidity of the structure and make the installation of the bag clamping opening mechanism more stable. When multiple weighing sensors 2 are set, the weight signals detected by all weighing sensors 2 are obtained and added. This process can be achieved by summing analog signals or processing digital signals.

[0035] Based on the above principle, the weighing sensor 2 is connected to the electrical control system of the unloading equipment, and the electrical control system of the unloading equipment is used to implement the above-mentioned weight signal processing. Finally, the real-time weight signal is obtained to control the speed of the unloading motor of the unloading equipment, and further realize the precise control of the unloading speed, which is of great significance to controlling the weight of the packaged products.

[0036] Correspondingly, the bag clamping and opening mechanism includes a bag opening plate base 3 and two bag clamping units of the same structure, and the two bag clamping units are symmetrically arranged at the bottom of the bag opening plate base 3 and movably connected to the bag opening plate base 3; the bag opening plate base 3 is fixedly connected to all weighing sensors 2, and a material discharge port 4 is provided on the bag opening plate base 3. The two bag clamping units cooperate with each other to complete the bag opening and bag clamping work of the packaging bag.

[0037] Based on the above structure, in actual use, the lifting guide mechanism can be connected to the driving mechanism, and the driving mechanism can be used to control the lifting and lowering of the sliding parts on the lifting guide mechanism. Before unloading, the lifting guide mechanism cooperates with the driving mechanism to raise the packaging table to a certain height, so that the bottom of the packaging bag is about 200mm away from the spiral discharge port of the unloading equipment. As the unloading is implemented, the height of the material in the packaging bag will slowly rise. At this time, the driving mechanism will control the weighing mechanism, the bag clamping opening mechanism and the packaging bag to gradually descend. The descending speed is controlled by judging the weight of the material in the bag through an algorithm, and a certain distance is maintained between the surface of the material in the packaging bag and the spiral discharge port in real time, but the distance is not too far. By limiting the height of the unloading, dust generation can be reduced. In addition, the distance between the spiral discharge port and the surface of the material in the bag can improve the accuracy of loading. Specifically, if the spiral discharge port is too high from the surface of the material in the bag, the material on the way to fall will increase. At the moment when the valve of the unloading equipment is closed, there will be airborne material between the spiral discharge port and the surface of the material in the bag. The density of the material may vary after passing through the screw, so it is not a fixed value, which will increase the instability of weighing. If the height from the spiral discharge port to the material surface is reduced, the airborne material can be reduced, thereby improving the weighing accuracy.

[0038] Example 2

[0039] This embodiment discloses a bag clamping device for feeding materials, as a preferred implementation of the technical solution, such as Figure 1 As shown, it includes a lifting and guiding mechanism, a weighing mechanism and a bag clamping and opening mechanism.

[0040] The lifting guide mechanism includes a fixed plate 5, a slide assembly and two guide columns 6 which are parallel to each other. The two guide columns 6 are relatively fixed by the fixed plate 5, and the slide assembly is slidably engaged with the two guide columns 6.

[0041] More specifically, the slide assembly includes a mounting plate 7 for mounting the bag opening plate base 3, and the bag opening plate base 3 can be detachably mounted on the mounting plate 7 by screws. At least four snap-in wheel assemblies 8 are mounted on the mounting plate 7, and all snap-in wheel assemblies 8 are arranged in two rows, and the two rows of snap-in wheel assemblies 8 are respectively snap-connected with the two guide columns 6. Furthermore, the two rows of snap-in wheel assemblies 8 are located between the two guide columns 6. In order to facilitate assembly and disassembly and maintenance, the snap-in wheel assemblies 8 and the guide rods are snap-connected in a contact manner, that is, the surface of the guide rod used to contact the snap-in wheel assemblies 8 is V-shaped, the circumferential surface of the snap-in wheel assemblies 8 is in contact with the guide rod, and the cross-section of the circumferential surface is a V-shaped groove structure, therefore, the pulley of the snap-in wheel assembly 8 can be called a V-groove snap-in wheel.

[0042] The weighing mechanism comprises a sensor base 1 and a plurality of weighing sensors 2; the sensor base 1 is mounted on a mounting plate 7 of the lifting guide mechanism, and all the weighing sensors 2 are fixedly mounted on the sensor base 1 respectively.

[0043] The bag clamping and opening mechanism includes a bag opening plate base 3 and two bag clamping units with the same structure, and the two bag clamping units are symmetrically arranged at the bottom of the bag opening plate base 3 and movably connected to the bag opening plate base 3; the bag opening plate base 3 is fixedly connected to all weighing sensors 2, and a feeding port 4 is opened on the bag opening plate base 3.

[0044] Example 3

[0045] This embodiment discloses a bag clamping device for feeding materials, as a preferred implementation of the technical solution, such as Figure 1 As shown, it includes a lifting and guiding mechanism, a weighing mechanism and a bag clamping and opening mechanism.

[0046] The weighing mechanism includes a sensor base 1 and a plurality of weighing sensors 2; the sensor base 1 is installed on the lifting guide mechanism, and all the weighing sensors 2 are fixedly installed on the sensor base 1 respectively.

[0047] The bag clamping and opening mechanism includes a bag opening plate base 3 and two bag clamping units with the same structure, and the two bag clamping units are symmetrically arranged at the bottom of the bag opening plate base 3 and movably connected to the bag opening plate base 3; the bag opening plate base 3 is fixedly connected to all weighing sensors 2, and a feeding port 4 is opened on the bag opening plate base 3.

[0048] More specifically, the bag clamping unit includes a bag opening plate 9, a plate opening cylinder 10, a bag clamping plate 11, a bag clamping cylinder 12 and a linkage assembly. The linkage assembly is fixedly mounted on the bag clamping plate 11, and the bag clamping plate 11 is fixedly connected to the linkage assembly. A cylinder seat 17 extends from the side of the bag opening plate base 3; the sleeve of the plate opening cylinder 10 is hinged to the cylinder seat 17, and the telescopic shaft of the plate opening cylinder 10 is hinged to the linkage assembly to control the opening and closing of the bag opening plate 9 through the actuation of the telescopic shaft. The sleeve and the telescopic shaft of the bag clamping cylinder 12 are respectively hinged to the linkage assembly to control the bag clamping plate 11 to approach and move away from the bag plate 9 through the actuation of the telescopic shaft in cooperation with the linkage assembly.

[0049] Based on the above structure, the working principle of bag opening in the technical solution is as follows: the bag opening plate 9, the cylinder seat 17, the plate opening cylinder 10 and the linkage assembly constitute a "linkage four corners", in which the angle between the linkage assembly and the bag opening plate 9 remains unchanged, and the lengths of the bag opening plate 9, the cylinder seat 17 and the linkage assembly remain unchanged. On this basis, when the telescopic rod of the plate opening cylinder 10 is extended, the length of the plate opening cylinder 10 increases, the angle between the plate opening cylinder 10 and the linkage assembly decreases, the angle between the plate opening cylinder 10 and the cylinder seat 17 decreases, and the angle between the bag opening plate 9 and the cylinder seat 17 increases, that is, the bag opening plate 9 gradually approaches the central axis of the bag opening plate base 3, preparing for bagging. In the process of bagging, when the bag opening plates 9 of the two bag clamping mechanisms are closed, the packaging bag is sleeved on the two bag opening plates 9, and the bag opening cylinder and the linkage assembly are used to control the bag clamping plate 11 to press the packaging bag to fit the bag opening plate 9 to prevent the packaging bag from falling during the bag opening process. Correspondingly, after the bagging is completed, the telescopic axis of the opening plate cylinder 10 is controlled to shrink, the length of the opening plate cylinder 10 is reduced, the angle between the opening plate cylinder 10 and the linkage assembly is increased, the angle between the opening plate cylinder 10 and the cylinder seat 17 is increased, and the angle between the bag opening plate 9 and the cylinder seat 17 is reduced, that is, the bag opening plate 9 gradually moves away from the central axis of the bag opening plate base 3, and the bag opening plates 9 of the two bag clamping units cooperate with each other to realize bag opening.

[0050] Example 4

[0051] This embodiment discloses a bag clamping device for feeding materials, as a preferred implementation of the technical solution, such as Figure 1 As shown, it includes a lifting and guiding mechanism, a weighing mechanism and a bag clamping and opening mechanism.

[0052] The weighing mechanism includes a sensor base 1 and a plurality of weighing sensors 2; the sensor base 1 is installed on the lifting guide mechanism, and all the weighing sensors 2 are fixedly installed on the sensor base 1 respectively.

[0053] The bag clamping and opening mechanism includes a bag opening plate base 3 and two bag clamping units with the same structure, and the two bag clamping units are symmetrically arranged at the bottom of the bag opening plate base 3 and movably connected to the bag opening plate base 3; the bag opening plate base 3 is fixedly connected to all weighing sensors 2, and a feeding port 4 is opened on the bag opening plate base 3.

[0054] More specifically, the bag clamping unit includes a bag opening plate 9, a plate opening cylinder 10, a bag clamping plate 11, a bag clamping cylinder 12 and a linkage assembly. The linkage assembly is fixedly mounted on the bag clamping plate 11, and the bag clamping plate 11 is fixedly connected to the linkage assembly. A cylinder seat 17 extends from the side of the bag opening plate base 3; the sleeve of the plate opening cylinder 10 is hinged to the cylinder seat 17, and the telescopic shaft of the plate opening cylinder 10 is hinged to the linkage assembly to control the opening and closing of the bag opening plate 9 through the actuation of the telescopic shaft. The sleeve and the telescopic shaft of the bag clamping cylinder 12 are respectively hinged to the linkage assembly to control the bag clamping plate 11 to approach and move away from the bag plate 9 through the actuation of the telescopic shaft in cooperation with the linkage assembly.

[0055] Furthermore, the linkage assembly includes a fixed base 13 and two Y-type linkage plates 14, and the Y-type linkage plate 14 includes a tail connection end and two head connection ends. The fixed base 13 is fixedly connected to the bag clamping plate 11, and the sleeve of the plate opening cylinder 10 and the telescopic rod of the bag clamping cylinder 12 are respectively hinged to the fixed base 13. The two Y-type linkage plates 14 are symmetrically arranged face to face, and the tail connection end of the Y-type linkage plate 14 is hinged to the fixed base 13, one head connection end of the Y-type linkage plate 14 is hinged to the telescopic shaft of the plate opening cylinder 10, and the other head connection end is fixedly connected to the bag clamping plate 11.

[0056] Based on the above structure, the working principle of the bag clamping of the technical solution is as follows: the bag opening plate 9, the cylinder seat 17, the plate opening cylinder 10 and the fixed base 13 constitute the "linked four corners" described in Example 3 to complete the corresponding bag opening work. The fixed base 13, the Y-type linkage plate 14 and the bag clamping cylinder 12 constitute a "linked triangle", in which the lengths of the fixed base 13 and the Y-type linkage plate 14 remain unchanged. On this basis, since the fixed base 13 is relatively fixed to the bag opening plate 9, when the telescopic axis of the bag clamping cylinder 12 is shortened, the length of the bag clamping cylinder 12 is reduced, the angle between the bag clamping cylinder 12 and the fixed base 13 is increased, the angle between the bag clamping cylinder 12 and the Y-type linkage plate 14 is increased, the angle between the Y-type linkage plate 14 and the fixed base 13 is reduced, and the angle between the Y-type linkage plate 14 and the bag opening plate 9 is increased, so that the bag clamping plate 11 on the Y-type linkage plate 14 gradually moves away from the bag plate 9 to prepare for bagging. When the bag opening plates 9 of the two bag clamping mechanisms are closed, the packaging bag is sleeved on the two bag opening plates 9, the telescopic axis of the bag clamping cylinder 12 is controlled to extend, the length of the bag clamping cylinder 12 increases, the angle between the bag clamping cylinder 12 and the fixed base 13 decreases, the angle between the bag clamping cylinder 12 and the Y-shaped linkage plate 14 decreases, the angle between the Y-shaped linkage plate 14 and the fixed base 13 increases, and the angle between the Y-shaped linkage plate 14 and the bag opening plate 9 decreases, so that the bag clamping plate 11 on the Y-shaped linkage plate 14 gradually approaches the bag opening plate 9 until it is tightly fitted with the bag opening plate 9, thereby clamping the packaging bag.

[0057] Example 5

[0058] This embodiment discloses a bag clamping device for feeding materials, as a preferred implementation of the technical solution, such as Figure 1 As shown, it includes a lifting and guiding mechanism, a weighing mechanism and a bag clamping and opening mechanism.

[0059] The lifting guide mechanism includes a fixed plate 5, a slide assembly and two guide columns 6 which are parallel to each other. The two guide columns 6 are relatively fixed by the fixed plate 5, and the slide assembly is slidably engaged with the two guide columns 6.

[0060] Furthermore, the slide assembly includes a mounting plate 7 for mounting the bag opening plate base 3, and at least four snap-in wheel assemblies 8 are mounted on the mounting plate 7. All snap-in wheel assemblies 8 are arranged in two rows, and the two rows of snap-in wheel assemblies 8 are snap-connected to the two guide columns 6 respectively.

[0061] The weighing mechanism comprises a sensor base 1 and a plurality of weighing sensors 2; the sensor base 1 is mounted on a mounting plate 7 of the lifting guide mechanism, and all the weighing sensors 2 are fixedly mounted on the sensor base 1 respectively.

[0062] The bag clamping and opening mechanism includes a bag opening plate base 3 and two bag clamping units of the same structure, and the two bag clamping units are symmetrically arranged at the bottom of the bag opening plate base 3 and movably connected to the bag opening plate base 3; the bag opening plate base 3 is fixedly connected to all the weighing sensors 2, and a material discharge port 4 is provided on the bag opening plate base 3. Among them, the model of the weighing sensor 2 can be selected as MTB-100.

[0063] The bag clamping unit includes a bag opening plate 9, a plate opening cylinder 10, a bag clamping plate 11, a bag clamping cylinder 12 and a linkage assembly. The linkage assembly is fixedly mounted on the bag clamping plate 11, and the bag clamping plate 11 is fixedly connected to the linkage assembly. A cylinder seat 17 extends from the side of the bag opening plate base 3; the sleeve of the plate opening cylinder 10 is hinged to the cylinder seat 17, and the telescopic shaft of the plate opening cylinder 10 is hinged to the linkage assembly to control the opening and closing of the bag opening plate 9 through the actuation of the telescopic shaft. The sleeve and the telescopic shaft of the bag clamping cylinder 12 are respectively hinged to the linkage assembly to control the bag clamping plate 11 to approach and move away from the bag plate 9 through the actuation of the telescopic shaft in cooperation with the linkage assembly.

[0064] Furthermore, the linkage assembly includes a fixed base 13 and two Y-type linkage plates 14, and the Y-type linkage plate 14 includes a tail connection end and two head connection ends. The fixed base 13 is fixedly connected to the bag clamping plate 11, and the sleeve of the plate opening cylinder 10 and the telescopic rod of the bag clamping cylinder 12 are respectively hinged to the fixed base 13. The two Y-type linkage plates 14 are symmetrically arranged face to face, and the tail connection end of the Y-type linkage plate 14 is hinged to the fixed base 13, one head connection end of the Y-type linkage plate 14 is hinged to the telescopic shaft of the plate opening cylinder 10, and the other head connection end is fixedly connected to the bag clamping plate 11.

[0065] Furthermore, bag clamping detection switches 15 are respectively installed near both ends of the bag clamping plate 11 , and avoidance grooves 16 corresponding to the bag clamping detection switches 15 are opened on the bag clamping plate 11 .

[0066] Based on the above structure, when there is no bagging, if the bag clamping plate 11 fits tightly with the bag opening plate 9, the bag clamping detection switch 15 is inserted into the avoidance groove 16 and cannot be triggered; when a packaging bag is set on the bag opening plate 9, the packaging covers the notch of the avoidance groove 16. At this time, if the bag clamping plate 11 fits tightly with the bag opening plate 9 through the packaging bag, the bag clamping detection switch 15 cannot enter the avoidance groove 16 and will be triggered. The technical solution sets the bag clamping detection switch 15 near the two ends of the bag clamping plate 11, so that the two bag clamping mechanisms cooperate to implement bagging detection in four directions of the packaging bag. When the four bag clamping detection switches 15 are triggered, it means that the bagging has been successful and the unloading operation can be implemented.

[0067] Based on the above principle, the four bag clamping detection switches 15 can be electrically connected to the electrical control system of the unloading equipment. The electrical control system of the unloading equipment determines whether the bagging is successful based on the feedback signals of the four bag clamping detection switches 15. If the bagging is successful, the unloading is controlled. If any one or more bag clamping detection switches 15 are not triggered, it is determined that the bagging is not successful and an error prompt is issued.

[0068] Furthermore, the bag clamping detection switch 15 may be a contact sensor.

[0069] Furthermore, the bag opening plate 9 includes a back plate 9.1 and two side plates 9.2 which are integrally arranged, and the side plates 9.2 are provided with closed bevel edges 9.3. When the two bag clamping mechanisms are closed, the side plates 9.2 of the two bag opening plates 9 are spliced ​​one by one, and the back plates 9.1 of the two bag opening plates 9 are at an acute angle, which is convenient for inserting into the packaging bag opening, that is, for bagging.

Claims

1. A bag clamping device for feeding, characterized in that: It includes a lifting and guiding mechanism, a weighing mechanism and a bag clamping and opening mechanism; The weighing mechanism comprises a sensor base (1) and a plurality of weighing sensors (2); the sensor base (1) is mounted on the lifting guide mechanism, and all the weighing sensors (2) are respectively fixedly mounted on the sensor base (1); The bag clamping and opening mechanism comprises a bag opening plate base (3) and two bag clamping units of identical structure, wherein the two bag clamping units are symmetrically arranged at the bottom of the bag opening plate base (3) and are movably connected to the bag opening plate base (3); the bag opening plate base (3) is fixedly connected to all weighing sensors (2), and a material discharge port (4) is provided on the bag opening plate base (3).

2. A bag clamping device for feeding material as claimed in claim 1, characterized in that: The lifting guide mechanism comprises a fixed plate (5), a slide assembly and two mutually parallel guide columns (6); the two guide columns (6) are relatively fixed via the fixed plate (5), and the slide assembly is slidably engaged with the two guide columns (6).

3. A bag clamping device for feeding material as claimed in claim 2, characterized in that: The slide assembly comprises a mounting plate (7) for mounting the bag opening plate base (3), and at least four snap-in wheel assemblies (8) are mounted on the mounting plate (7). All snap-in wheel assemblies (8) are arranged in two rows, and the two rows of snap-in wheel assemblies (8) are respectively snap-in connected to the two guide columns (6).

4. A bag clamping device for feeding material as claimed in claim 1, characterized in that: The bag clamping unit comprises a bag opening plate (9), a plate opening cylinder (10), a bag clamping plate (11), a bag clamping cylinder (12) and a linkage assembly; The linkage assembly is fixedly mounted on the bag clamping plate (11), and the bag clamping plate (11) is fixedly connected to the linkage assembly; A cylinder seat (17) extends from the side of the bag opening plate base (3); the sleeve of the plate opening cylinder (10) is hinged to the cylinder seat (17), and the telescopic shaft of the plate opening cylinder (10) is hinged to the linkage assembly, so as to control the opening and closing of the bag opening plate (9) through the actuation of the telescopic shaft; The sleeve and telescopic shaft of the bag clamping cylinder (12) are respectively hinged to the linkage assembly, so as to control the bag clamping plate (11) to approach and move away from the bag plate (9) through the actuation of the telescopic shaft and the linkage assembly.

5. A bag clamping device for feeding material as claimed in claim 4, characterized in that: The linkage assembly comprises a fixed base (13) and two Y-shaped linkage plates (14), wherein the Y-shaped linkage plates (14) comprise a tail connection end and two head connection ends; The fixed base (13) is fixedly connected to the bag clamping plate (11), and the sleeve of the plate opening cylinder (10) and the telescopic rod of the bag clamping cylinder (12) are respectively hinged to the fixed base (13); The two Y-shaped linkage plates (14) are symmetrically arranged face to face, and the tail connection end of the Y-shaped linkage plate (14) is hinged to the fixed base (13), one head connection end of the Y-shaped linkage plate (14) is hinged to the telescopic shaft of the plate opening cylinder (10), and the other head connection end is fixedly connected to the bag clamping plate (11).

6. A bag clamping device for feeding material as claimed in claim 4, characterized in that: The bag clamping plate (11) is respectively provided with bag clamping detection switches (15) near both ends thereof, and the bag clamping plate (11) is provided with avoidance grooves (16) corresponding one to one with the bag clamping detection switches (15).

7. A bag clamping device for feeding material as claimed in claim 6, characterized in that: The bag clamping detection switch (15) is a contact sensor.

8. A bag clamping device for feeding material as claimed in claim 2, characterized in that: The bag opening plate (9) comprises a back plate (9.1) and two side plates (9.2) which are integrally arranged, and the side plates (9.2) are provided with closed bevel edges (9.3).

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