A bag-feeding packaging machine and a bag-feeding packaging method

Abstract

The present invention provides a bag-feeding packaging machine and a bag-feeding packaging method. The bag-feeding packaging machine includes a machine frame, a bag storage and separation mechanism, a zipper-opening mechanism, a bag-opening mechanism, a filling mechanism, a primary sealing mechanism, a secondary sealing mechanism, and a discharging mechanism. It is characterized in that the bag-feeding packaging machine further includes a circulating bag-feeding mechanism. The circulating bag-feeding mechanism is installed on the machine frame. The circulating bag-feeding mechanism includes a circulating transmission mechanism. A plurality of groups of bag-clamping mechanisms are provided on the circulating transmission mechanism. The bag-clamping mechanism includes a bag clip adjusting mechanism and a bag clip assembly. The bag clip adjusting mechanism and the bag clip assembly are respectively driven by independently controllable power devices. The working stations of the present invention include a bag-taking and feeding station, a zipper-opening bag station, a bag-opening station, a detection station, a bag-bottom supporting station, a filling station, a primary sealing station, and a secondary sealing station, which are arranged in sequence along the circumferential direction.

Description

Technical Field

[0001] The present invention relates to the field of filling and packaging, and particularly to a bag - feeding packaging machine and a bag - feeding packaging method. Background Art

[0002] All kinds of bags, boxes, sleeves, envelopes, etc. made of paper, aluminum foil, fiber, plastic film and their composites belong to soft - bag packaging. For filling machines with bags as packaging containers, multiple sets of bag - clamping mechanisms that make circular motions are provided.

[0003] In the past, the distance between the left and right bag clamps in the bag - clamping mechanism was adjusted by a mechanical control structure arranged on the movement path of the bag - clamping mechanism. When changing specifications or when the distance between the bag clamps needs to be adjusted or the timing of opening the bag clamps needs to be changed at some specified workstations, it cannot be adjusted arbitrarily, the disassembly is troublesome, and the adaptability is poor.

[0004] In the past, the clamps in the bag - clamping mechanism adopted a mechanical self - clamping mechanism, which always clamped the bag through the pressure of a spring. On the circular movement path of the bag - clamping mechanism, a mechanical control structure was arranged. When the clamps needed to be opened at a specified workstation, the mechanical control structure at that position was used to push open the bag clamps. In the existing above - mentioned filling machines, generally, only at the bag - feeding workstation and the bag - discharging workstation, the bag clamps are controlled to open by the mechanical control structures at the corresponding workstations, while at the bag - opening, filling, and sealing workstations, a bag - clamp opening control structure cannot be set. In this way, bags that are not opened or not filled during the conveying process cannot be removed, and can only flow out from the bag - discharging workstation according to the process, and are picked out manually after the bag - discharging workstation, increasing the inspection workload and the risk of unfilled bags mixed in the finished products. Summary of the Invention

[0005] The first object of the present invention is to provide a bag - feeding packaging machine and a bag - feeding packaging method. The technical solutions adopted by the present invention are as follows:

[0006] A bag - feeding packaging machine includes a frame, a circulating bag - feeding device, a power device for driving the circulating bag - feeding device to rotate, and a plurality of bag - clamping mechanisms distributed along the circulating movement direction on the circulating bag - feeding device. The bag - clamping mechanisms are circulated through a plurality of workstations required from the bag - taking and feeding workstation to the sealing workstation and then back to the bag - taking and feeding workstation or from the bag - taking and feeding workstation to the discharging workstation and then back to the bag - taking and feeding workstation under the conveyance of the circulating mechanism. It is characterized in that the bag - clamping mechanism includes a left bag - clamp assembly, a right bag - clamp assembly and a bag - clamp adjusting mechanism. The left bag - clamp assembly and the right bag - clamp assembly are connected to the bag - clamp adjusting mechanism. The bag - clamp adjusting mechanism and the bag - clamp assembly are respectively driven by independently controllable power devices. The bag - clamp adjusting mechanism is driven by its power device to independently adjust the distance between the left bag - clamp assembly and the right bag - clamp assembly. The power device of the bag - clamp assembly is driven to move together with the bag - clamp assembly by the bag - clamp adjusting mechanism and independently controls the opening and closing of the bag clamps in the bag - clamp assembly.

[0007] On the basis of adopting the above technical solutions, the present invention can also adopt the following further technical solutions, or use these further technical solutions in combination:

[0008] The power device of the bag clip adjusting mechanism adopts a motor, and the power device of the bag clip assembly adopts a cylinder; the cylinder of the bag clip assembly is communicated with a control valve through a connecting pipe, and one control valve is correspondingly arranged for each group of bag clamping mechanisms, and each cylinder control valve is connected to a transfer device through a connecting pipe. The transfer device is fixedly installed at the upper end of the main shaft of the circulating mechanism, is coaxial with the main shaft and rotates together with the main shaft.

[0009] At the position where it is specified to open the bag clip, a control member is provided. The control member is driven by power to control the opening timing, and the control member cooperates with the cylinder control valve for on-off control.

[0010] The bag clip adjusting mechanism is provided with a mounting frame, the mounting frame is connected to the circulating mechanism, and the control valve is arranged on the back surface of the mounting frame.

[0011] The mounting member of the control member is fixed on the upper end surface of the outer shaft.

[0012] The main shaft is rotationally connected to the outer shaft through a bearing. The outer shaft is fixedly connected to the machine frame. The lead wires of the power devices of each group of bag clip adjusting mechanisms penetrate into the central hole of the main shaft, and the lead wires are connected to a conductive mechanism arranged at the bottom end of the main shaft. The conductive mechanism adopts a contact conductive method.

[0013] The power device of the bag clip adjusting mechanism adopts a motor, and the power device of the bag clip assembly adopts a cylinder; the cylinder of the bag clip assembly is communicated with a control valve through a connecting pipe, and one control valve is correspondingly arranged for each group of bag clamping mechanisms. The circulating bag feeding mechanism is provided with a rotation controller, and the rotation controller is arranged on the main shaft of the circulating mechanism. The rotation controller is signal-connected to the controller of the control valve.

[0014] The bag clamping mechanism includes a bag clip assembly and a mounting seat. The bag clip assembly is provided with a first bag clamping member and a second bag clamping member, and the first bag clamping member and the second bag clamping member are combined into a bag clip. The bag clip assembly is further provided with a power mechanism and a protective mounting member. The protective mounting member is fixedly connected to the mounting seat. The first bag clamping member is connected to the power mechanism, and the first bag clamping member is independently driven by the power mechanism to perform opening and closing actions.

[0015] In the bag clip assembly, the power mechanism is arranged inside the protective mounting member.

[0016] The protective mounting member extends forward in an arm shape in front of the mounting seat; the protective mounting member is a tubular component; the power mechanism in the bag clip assembly adopts a cylinder or an electric cylinder and is connected to the first bag clamping member through a movable connecting member.

[0017] The power mechanism is arranged inside the protective mounting member. The cross-sectional dimensions of both the power mechanism and the movable connecting member are smaller than the internal cross-sectional dimension of the protective mounting member, enabling them to rotate slightly inside the protective mounting member.

[0018] The second bag clamping member is fixed to the end of the protective mounting member. The first bag clamping member is arranged outside the second bag clamping member and is hingedly mounted.

[0019] The second bag clamping member is fixed to the end of the protective mounting member. The first bag clamping member is arranged outside the second bag clamping member and is hingedly mounted. The movable connecting member is movably connected to the first bag clamping member. The power mechanism in the bag clamping assembly is movably connected to the connecting structure in the mounting hole of the mounting seat, or movably connected to the rear end of the protective mounting member, or mounted behind the mounting seat.

[0020] The movable connection is a rotational connection.

[0021] The movable connecting member includes a first movable connecting member and a second movable connecting member. The rear end of the first movable connecting member is connected to the protruding rod of the power mechanism, the front end is rotatably connected to the rear end of the second movable connecting member, and the front end of the second movable connecting member is movably connected to the first bag clamping member.

[0022] Both the first bag clamping member and the second bag clamping member are clamping blocks. The first bag clamping member is rotatably connected to the second bag clamping member through a pin shaft, and the second bag clamping member is fixed to the front end of the protective mounting member through a mounting hole.

[0023] The bag clamping mechanism is provided with two sets of the above-mentioned bag clamping assemblies, a left mounting seat and a right mounting seat, a horizontal linear adjustment mechanism and a horizontal linear guiding mechanism. The horizontal linear adjustment mechanism is provided with a power mechanism of the adjustment mechanism. The left mounting seat and the right mounting seat respectively mount the left bag clamping assembly and the right bag clamping assembly. The left mounting seat, the right mounting seat and the horizontal linear adjustment structure are connected, and can be driven by the power mechanism of the adjustment mechanism to independently adjust the distance between the two sets of bag clamping assemblies on the left and right.

[0024] The bag clamping mechanism includes a bag clamping assembly and a mounting seat. The bag clamping assembly is provided with a first bag clamping member and a second bag clamping member, and the first bag clamping member and the second bag clamping member are combined into a bag clamp. It is characterized in that the bag clamping assembly is further provided with a power mechanism and one, two or more bag clamps. The one, two or more bag clamps are driven by the power mechanism to synchronously rotate with their respective rotation shafts as the fulcrums, and the bag clamps are independently driven by the power mechanism to open and close.

[0025] The bag clamping assembly is further provided with a protective mounting member, the power mechanism is provided with a rack transmission member, the rack transmission member is arranged inside the protective mounting member, the protective mounting member is fixedly connected to the mounting seat, the first bag clamping member and the second bag clamping member are mounted on the protective mounting member, and the bag clamp formed by the combination of the first bag clamping member and the second bag clamping member is connected to the rack transmission member through a gear.

[0026] The protective mounting member extends forward of the mounting seat in an arm shape, the rack transmission member is arranged along the length direction of the protective mounting member, and the plurality of bag clamps are arranged along the length direction of the protective mounting member.

[0027] The first bag clamping member and the second bag clamping member are respectively provided with gears, the gear of the first bag clamping member is meshed and connected with the rack transmission member, and the gear of the second bag clamping member is meshed and connected with the gear of the first bag clamping member.

[0028] The bag clamping assembly is provided with a structure for preventing the rotation of the rack transmission member, and the rotation refers to the rotation of the rack transmission member parallel to the axis of the rack.

[0029] The structure for preventing the rotation of the rack transmission member includes: a guiding and positioning member arranged in parallel with and connected to the side of the rack transmission member, a guiding and positioning hole arranged on the protective mounting member for cooperating with the guiding and positioning member, a guiding part arranged on the rack transmission member, and a guiding hole arranged on the protective mounting member for the rack transmission member to insert into and guide its guiding part.

[0030] The protective mounting member is composed of an upper component and a lower component connected together. The lower component mounts the first bag clamping member and the second bag clamping member, and the upper component is provided with holes for the shafts of the first bag clamping member and the second bag clamping member to pass through; the gears are arranged in the inner cavity formed by the combination of the upper component and the lower component.

[0031] The rack transmission member is provided with multiple sections of racks, and each section of rack corresponds to a bag clamp respectively.

[0032] Both the first bag clamping member and the second bag clamping member adopt clamping blocks.

[0033] It is provided with two sets of the above-mentioned bag clamping assemblies on the left and right, a left mounting seat and a right mounting seat, a horizontal linear adjustment mechanism and a horizontal linear guiding mechanism. The horizontal linear adjustment mechanism is provided with a power mechanism of the adjustment mechanism. The left mounting seat and the right mounting seat respectively mount the left bag clamping assembly and the right bag clamping assembly; the left mounting seat, the right mounting seat and the horizontal linear adjustment structure are connected and can be driven by the power mechanism of the adjustment mechanism, independent of the cam mechanism, to independently adjust the distance between the two sets of bag clamping assemblies on the left and right.

[0034] The bag clip adjusting mechanism includes a left mounting seat, a right mounting seat, a horizontal linear adjusting mechanism and a horizontal linear guiding mechanism. The horizontal linear adjusting mechanism is provided with a power mechanism. The left mounting seat and the right mounting seat are respectively installed with a left bag clip assembly and a right bag clip assembly. The left mounting seat, the right mounting seat and the horizontal linear adjusting structure are connected and can be driven by the power mechanism to independently adjust the distance between the left bag clip assembly and the right bag clip assembly.

[0035] The horizontal linear adjusting mechanism includes a horizontally arranged lead screw, a left internal thread member and a right internal thread member with opposite helix directions. The lead screw is a threaded rod with opposite left and right helix directions and is respectively correspondingly connected to the left internal thread member and the right internal thread member. The left internal thread member and the right internal thread member are respectively arranged on the left mounting seat and the right mounting seat, and the left mounting seat and the right mounting seat can move synchronously in opposite directions.

[0036] The horizontal linear adjusting mechanism includes two horizontally arranged lead screws with opposite helix directions, a left internal thread member and a right internal thread member with opposite helix directions. The left internal thread member and the right internal thread member are correspondingly connected to the two lead screws with opposite helix directions respectively. The left internal thread member and the right internal thread member are respectively arranged on the left mounting seat and the right mounting seat, and the left mounting seat and the right mounting seat can move synchronously in opposite directions.

[0037] The horizontal linear adjusting mechanism is a structure of a gear and a rack in cooperation.

[0038] In the horizontal linear adjusting structure, a left horizontal rack and a right horizontal rack are provided. The gear meshes with the left horizontal rack and the right horizontal rack to drive the left horizontal rack and the right horizontal rack to move synchronously in opposite directions. The left mounting seat and the right mounting seat are respectively provided with the left horizontal rack and the right horizontal rack, and the left mounting seat and the right mounting seat can move synchronously in opposite directions.

[0039] The horizontal linear guiding mechanism includes a left slider and its guide rail, a right slider and its guide rail. The left mounting seat and the right mounting seat are respectively connected to the left slider and the right slider, and the guide rail is fixed on the mounting frame.

[0040] The horizontal linear guiding mechanism includes a left sliding bearing and its guide rod, a right sliding bearing and its guide rod. The left mounting seat and the right mounting seat are respectively connected to the left sliding bearing and the right sliding bearing, and the guide rod is fixed on the mounting frame.

[0041] The bag clip assemblies installed on the left mounting seat and the right mounting seat are provided with single-station bag clips, or two or more multi-station bag clips arranged front and back.

[0042] The mounting frame of the bag clamp adjustment mechanism is fixed on the steering wheel of the bag feeding packaging machine; the left bag clamp assembly and the right bag clamp assembly are respectively provided with separately controlled driving mechanisms to independently drive the bag clamps in the bag clamp assemblies, and the driving mechanisms in the left bag clamp assembly and the right bag clamp assembly are respectively mounted on the left mounting seat and the right mounting seat, and move with the left mounting seat and the right mounting seat respectively.

[0043] A working mechanism with a bag bottom supporting function is arranged at the inspection station or the bag bottom supporting station or the inspection and bag bottom supporting station. The working mechanism includes a fixed bracket, a lifting bracket, a lifting power mechanism for driving the lifting bracket to perform lifting movement, and a bag bottom supporting mechanism. The bag bottom supporting mechanism is provided with a bag bottom supporting piece and a structure for supporting the bag wall. The bag bottom supporting mechanism is arranged on the lifting bracket.

[0044] The descending height of the bag bottom supporting mechanism is uniformly determined by the lifting power mechanism according to the set descending stroke.

[0045] The bag-stretching bottom piece is provided with a stretching portion, and the structure of the bag-stretching wall comprises the stretching portion, a stretching driving mechanism and an elastic reset mechanism. The stretching driving mechanism drives the bag-stretching bottom piece to open, and stretches the bag wall through the stretching portion.

[0046] The bag-supporting bottom piece includes left and right bag-supporting bottom pieces, and the left and right bag-supporting bottom pieces are rotatably mounted on a lifting bracket. An opening driving mechanism is mounted on the lifting bracket. The opening driving mechanism is provided with a driving rod, and the driving rod is provided with a top block. The left and right bag-supporting bottom pieces are respectively provided with parts cooperating with the top block, and are acted upon when the top block descends, so that the left and right bag-supporting bottom pieces are rotated and opened.

[0047] The spreading drive mechanism is installed on the lifting bracket with an adjustable installation height, and the connecting rod passes through the lifting bracket and is connected to the top block at the bottom.

[0048] The bag supporting bottom piece includes left and right bag supporting bottom pieces, the lower ends of the left and right bag supporting bottom pieces are inclined and cooperate to form a cone, and the cone serves as a functional part of the top bag bottom. A cavity is formed between the swing arm parts of the left and right bag supporting bottom pieces, and the detection part installation and connection part of the bag opening detection mechanism is arranged in the cavity; the two ends of the elastic element of the elastic reset mechanism are respectively connected to the left and right bag supporting bottom pieces.

[0049] A bag opening detection mechanism is also arranged on the lifting bracket to detect whether the bag opening is opened.

[0050] The bag opening detection mechanism includes a detection piece mounting frame, a sensor, a sensor bracket and an elastic detection component, the lower end of the elastic detection component is mounted on the detection piece mounting frame, the detection piece bracket is mounted on the lifting bracket, and the sensor bracket is mounted on the lifting bracket; the upper part of the elastic detection component cooperates with the sensor mounted on the sensor bracket, the elastic detection component is provided with a detection portion that cooperates with the bag opening, and the elastic detection component can be elastically deformed under pressure.

[0051] The elastic detection component includes left and right detection components. The detection component mounting frame and the lower part of the elastic detection component are located in the cavity between the left and right bag bottom parts in the bag bottom supporting mechanism. The upper parts of the left and right detection components are cantilevered and, in a free state, pass through the through holes on the left and right bag bottom parts, and the parts that pass through to the outside of the left and right bag bottom parts serve as detection parts.

[0052] The detection component adopts a spring sheet, and its detection part is in the shape of a hypotenuse inclined upward and outward; the sensor and sensor bracket are arranged on the outside of the top of the left and right bag support bottom parts, and a limiting component at the upper end of the elastic detection component is also arranged thereon.

[0053] According to the second aspect of the present invention, in order to achieve the above-mentioned purpose, the present invention provides the following technical solution of the packaging method.

[0054] A bag packaging method, characterized by comprising the following workstation steps:

[0055] S1 bag storage and bag separation station: used for storing bag stacks and arranging bag separation actions;

[0056] S2 bag picking and delivering station: it delivers the sorted bags to the circulating bag delivering device;

[0057] Circular bag feeding device: After receiving the bag, it is circulated and transported through the power mechanism to each workstation to complete the action of each workstation;

[0058] S3 zipper bag opening station: when the bag has a zipper, it is used to open the zipper of the bag. When the bag is not a zipper bag, this step is omitted;

[0059] S4 bag opening station: used for bag opening;

[0060] S5 detection station is used to detect whether the bag is opened successfully and determine whether the bag should proceed to the next step;

[0061] S6 bag bottom support station: on the basis of bag opening, the bag bottom is further supported to facilitate the action of the next station;

[0062] The positions S5 and S6 can be swapped or combined into one station;

[0063] S7 Filling Station: used for filling materials into bags;

[0064] S8 Sealing Station: performs a sealing action on the filled bags.

[0065] The method uses the bag - feeding packaging machine described in claim 1. The omission of the step in step S3 means that the working device corresponding to the zipper - opening work does not operate or the zipper - opening bag station is cancelled.

[0066] Further, after the S8 Sealing Station, an S9 Secondary Sealing Station is also provided: used for performing a second sealing action on the bags that have completed the first sealing;

[0067] Further, the bag - picking and - delivering station, the zipper - opening bag station, the bag - opening station, the inspection station, the bag - bottom - supporting station, the filling station, the first - sealing station, and the secondary - sealing station are arranged in a circumferential direction.

[0068] Due to adopting the technical solution of the present invention, it is possible to independently adjust the distance between the bag clamps, separately control the timing of opening the bag clamps, endow the bag - feeding packaging machine with a variety of different functions and flexible arrangements, facilitate the control of various operating steps of the whole machine and the rejection of unqualified bags, and can complete bag conveying and filling work with high quality and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 It is one of the overall schematic diagrams of the bag - feeding packaging machine of the present invention, and each station is also shown in the figure.

[0070] Figure 2 It is another overall schematic diagram of the bag - feeding packaging machine of the present invention, and each station is also shown in the figure.

[0071] Figure 3 It is the top view of the bag - feeding packaging machine of the present invention.

[0072] Figure 4 It is the flow chart of the packaging method of the present invention.

[0073] Figure 5 It is the schematic diagram of the bag - feeding packaging machine applying the circulating mechanism of the present invention.

[0074] Figure 6 It is Figure 5 The schematic diagram after hiding the steering wheel cover plate.

[0075] Figure 7 It is the schematic diagram of an embodiment of the present invention applying another bag - clamp assembly.

[0076] Figure 8 It is Figure 5 The side view of the embodiment.

[0077] Figure 9 It isFigure 5 Top view of the embodiment.

[0078] Figure 10 is Figure 9 B - B sectional view of

[0079] Figure 11 One of the schematic diagrams of the bag opening detection and bag bottom supporting mechanism of the bag - feeding packaging machine of the present invention.

[0080] Figure 12 Another schematic diagram of the bag opening detection and bag bottom supporting mechanism of the bag - feeding packaging machine of the present invention.

[0081] Figure 13 Schematic diagram of the bag bottom supporting structure of the bag opening detection and bag bottom supporting mechanism.

[0082] Figure 14 Schematic diagram of the detection structure of the bag opening detection and bag bottom supporting mechanism.

[0083] Figure 15 Exploded view of the bag opening detection and bag bottom supporting mechanism.

[0084] Figure 16 Schematic diagram of the adjustable bag clip mechanism of the present invention.

[0085] Figure 17 Schematic diagram of another embodiment of the adjustable bag clip mechanism of the present invention.

[0086] Figure 18 is Figure 16 exploded view of the structure of

[0087] Figure 19 is Figure 17 exploded view of the structure of

[0088] Figure 20 Schematic diagram of the embodiment of the adjustable bag clip mechanism of the present invention adapted to two bags.

[0089] Figure 21 Exploded view of the embodiment of the adjustable bag clip mechanism of the present invention adapted to two bags.

[0090] Figure 22 Schematic diagram of another implementation manner of the adjustable bag clip mechanism of the present invention.

[0091] Figure 23 Exploded view of Embodiment 1 of the bag clip assembly of the present invention.

[0092] Figure 24 One of the schematic diagrams of Embodiment 1 of the present invention.

[0093] Figure 25 Another schematic diagram of Embodiment 1 of the present invention.

[0094] Figure 26 This is a schematic structural diagram of Embodiment 2 of the bag clamping component of the present invention.

[0095] Figure 27 This is an exploded view of Embodiment 2 of the present invention.

[0096] Figure 28 This is one of the schematic diagrams of the embodiment of the present invention adapted to two bags.

[0097] Figure 29 This is the second schematic diagram of the embodiment of the present invention adapted to two bags.

[0098] Figure 30 This is the third schematic diagram of the embodiment of the present invention adapted to two bags.

[0099] Figure 31 This is the first exploded view of the embodiment of the present invention adapted to two bags.

[0100] Figure 32 This is the second exploded view of the embodiment of the present invention adapted to two bags.

[0101] Figure 33 This is the schematic diagram of the embodiment of the present invention adapted to one bag. Detailed implementation manners

[0102] Referring to the accompanying drawings. The bag-feeding packaging machine provided by the present invention includes a machine frame 700, a circulating bag-feeding device, and a power device for driving the rotation of the circulating mechanism.

[0103] In this embodiment, the circulating mechanism in the circulating bag-feeding device makes a circular motion, and each working station is arranged along the circumferential direction. The circulating mechanism includes a main shaft 600, a steering wheel 300, a turntable power 301 for driving the rotation of the steering wheel, a plurality of groups of bag clamping mechanisms are circumferentially distributed on the steering wheel 300, and a cover plate 302 is installed on the steering wheel 300.

[0104] Under the transportation of the circulating mechanism, the bag clamping mechanism circulates through multiple working stations required from the bag taking and feeding station to the discharging station and then back to the bag taking and feeding station.

[0105] The bag clamping mechanism provided by the present invention includes a bag clamping component and a mounting seat. There are two groups of bag clamping components on the left and right, numbered 101 and 102 respectively. Correspondingly, there are a left mounting seat 11 and a right mounting seat 12, which respectively install the left bag clamping component 101 and the right bag clamping component 102. The structures of the two groups of bag clamping components are the same, and the following takes one of the groups as an example for detailed description.

[0106] The bag clamping assembly is provided with a first bag clamping member 51 and a second bag clamping member 52. The first bag clamping member 51 and the second bag clamping member 52 are combined to form a bag clamp. The bag clamping assembly is further provided with a power mechanism and a protective mounting member 6. The power mechanism is arranged inside the protective mounting member 6. The protective mounting member 6 is fixedly connected to the mounting seat (either the left mounting seat 11 or the right mounting seat 12 according to its position). The first bag clamping member 51 is connected to the power mechanism. The power mechanism independently drives the first bag clamping member 51 to perform opening and closing actions as required, thereby opening or closing the bag clamp.

[0107] The protective mounting member 6 is a tubular component, which can be a circular hollow tube, a square hollow tube or other shapes. The protective mounting member 6 extends forward from the mounting seat in an arm shape and is mounted at the rear end in the mounting hole 10 of the mounting seat. The power mechanism adopts a cylinder 50 or an electric cylinder and is connected to the first bag clamping member 51 through a movable connecting member. The cross-sectional dimensions of both the power mechanism and the movable connecting member are smaller than the internal cross-sectional dimension of the protective mounting member 6, so that they can rotate slightly inside the protective mounting member. This slight rotation can adapt to the lateral change of the connection position between the first bag clamping member 51 and the movable connecting member when the first bag clamping member 51 is opened, making the operation of the mechanism smoother in a simpler way.

[0108] In this embodiment, the second bag clamping member 52 functions as a bag clamp mounting seat. The second bag clamping member 52 includes an open mounting hole 520. A connecting portion 521 is provided at the opening. The connecting portion 521 is fixedly connected by sleeving the mounting hole 520 on the end of the tubular protective mounting member 6 and using a pin shaft and a plug pin (other methods such as a pin shaft and a circlip, a bolt and a nut can also be used). The bag clamping portion of the second bag clamping member 52 can be a clamping block 522 and is provided with a clamping block pad, a flexible bag. The first bag clamping member 51 is arranged outside the second bag clamping member 52 and is hinged to the second bag clamping member 52. Specifically, the mounting portion of the first bag clamping member 51 and the connecting portion of the second bag clamping member 52 can be hinged by the above-mentioned pin shaft. The bag clamping portion of the first bag clamping member 51 also adopts a clamping block and is provided with a pad. The second bag clamping member can also be made in an integral form with the protective mounting member 6.

[0109] The movable connecting member is rotatably connected to the first bag clamping member 51. The power mechanism is movably connected to the connecting structure in the mounting hole 10 of the mounting seat. Figure 23 A power mechanism mounting method is shown. A connecting ear plate 13 is arranged in the mounting hole 10. The tail of the power mechanism is connected to the connecting ear plate through a pin shaft. Figure 27 Another power mechanism mounting method is shown. The power mechanism is connected to a connecting sleeve, and the connecting sleeve is rotatably connected to the tail of the tubular protective mounting member 6 through a pin shaft.

[0110] The movable connecting member includes a first movable connecting member 53 and a second movable connecting member 54. Both the first movable connecting member 53 and the second movable connecting member 54 can be a connecting rod. The rear end of the first movable connecting member 53 is fixedly connected to the protruding rod 55 of the power mechanism, and the front end is rotatably connected to the rear end of the second movable connecting member 54. The front end of the second movable connecting member 54 extends out of the front end of the tubular protective mounting member 6 and is rotatably connected to the connecting hole 56 on the first bag clamping member 51 through a pin shaft. The rotational connection between the first movable connecting member 53 and the second movable connecting member 54 can also adopt a spherical plain bearing or a universal joint structure. As described above, the power mechanism 50 can rotate slightly. Thus, when the movable connecting member moves in the length direction of the bag clamping assembly under the pushing action of the protruding rod 55, a slight bending can occur at the connection between the first movable connecting member 53 and the second movable connecting member 54, and the bending angle adapts to the opening angle between the first bag clamping member 51 and the second bag clamping member 52.

[0111] The bag clamping mechanism is further provided with a horizontal linear adjustment mechanism and a horizontal linear guiding mechanism. The horizontal linear adjustment mechanism is provided with a power mechanism 20 of the adjustment mechanism; the left mounting seat 11, the right mounting seat 12 are connected to the horizontal linear adjustment structure and can be driven by the power mechanism of the adjustment mechanism to independently adjust the distance between the left and right groups of bag clamping assemblies.

[0112] The mounting bracket 4 of the bag clamping adjustment mechanism is fixed on the steering wheel 300 of the bag feeding and packaging machine. The reference numeral 201 is the bag to be clamped. The reference numeral 5 is the control mechanism of the air cylinder 50, which is mounted behind the mounting bracket 4.

[0113] The bag clamping adjustment mechanism includes a left mounting seat 11, a right mounting seat 12, a horizontal linear adjustment mechanism and a horizontal linear guiding mechanism. The horizontal linear adjustment mechanism is provided with a power mechanism, and the power mechanism can be a motor, an air cylinder or an electric cylinder, etc. In this embodiment, it is a motor 20. The left mounting seat 11 and the right mounting seat 12 are respectively mounted with a left bag clamping assembly 101 and a right bag clamping assembly 102; the left mounting seat 11, the right mounting seat 12 are connected to the horizontal linear adjustment structure and can be driven by the power mechanism to independently adjust the distance between the left bag clamping assembly and the right bag clamping assembly at any position on the packaging bag conveying path according to requirements, without the need to adjust the position and shape of the mechanical control mechanism.

[0114] As Figure 16 、 18As shown, the horizontal linear adjustment mechanism can be a structure in which a motor drives a lead screw to move, driving the nut sleeves at both ends to move away from and close to each other, thereby adjusting the distance between the bag clips. It includes a horizontally arranged lead screw, left and right nut sleeves 21 and 22 with opposite helix directions. The lead screw is a threaded rod 23, 24 with opposite left and right helix directions and is respectively connected to the left and right nut sleeves 21 and 22. The left nut sleeve 21 and the right nut sleeve 22 are respectively arranged on the left mounting seat 11 and the right mounting seat 12, and the left mounting seat 11 and the right mounting seat 12 can move synchronously and in opposite directions. It is also possible to directly provide corresponding threaded holes on the left mounting seat 11 and the right mounting seat 12, and the lead screw is directly threadedly connected to the left mounting seat 11 and the right mounting seat 12.

[0115] As Figure 17 , 19 shown, if a double-headed motor is used, the lead screw can also be composed of two horizontally arranged lead screws with opposite helix directions, and the left and right nut sleeves are respectively connected to the two lead screws 23b and 24b with opposite helix directions. The double-headed motor is respectively connected to the two lead screws by a coupling device, and the coupling device can be a coupling 28. Figure 2 , 4 in the same reference numerals as Figure 1 , 3 represent the same meaning.

[0116] As Figure 22 shown, the horizontal linear adjustment mechanism can also be a structure of a gear and a rack in cooperation, and the following structure can be adopted: a left horizontal rack 25 and a right horizontal rack 26 are provided in the horizontal linear adjustment structure. The gear 27 is connected to the motor, and the gear 27 meshes with the left horizontal rack 25 and the right horizontal rack 26 to drive the left horizontal rack 25 and the right horizontal rack 26 to move synchronously and in opposite directions. The left mounting seat 11 and the right mounting seat 12 are respectively provided with the left horizontal rack 25 and the right horizontal rack 26, and the left mounting seat 11 and the right mounting seat 12 move synchronously and in opposite directions.

[0117] The horizontal linear guiding mechanism includes a left slider 31 and its guide rail 33, a right slider 32 and its guide rail 34. The left mounting seat 11 and the right mounting seat 12 are respectively connected to the left slider 31 and the right slider 32, and the guide rails 33, 34 are fixed on the mounting frame 4. Correspondingly, the power mechanism of the horizontal linear adjustment mechanism, the lead screw mounting frame of the adjustment mechanism, etc. can also be mounted on the mounting frame 4.

[0118] The horizontal linear guiding mechanism can also adopt the structure of a sliding bearing and a sliding rod, including a left sliding bearing and its guide rod, a right sliding bearing and its guide rod. The left mounting seat and the right mounting seat are respectively connected to the left sliding bearing and the right sliding bearing, and the guide rod is fixed on the mounting frame.

[0119] The bag clamping assemblies mounted on the left mounting seat 11 and the right mounting seat 12 are single-station bag clamps (such as Figure 16 , 17 , 18, 19 shown), or double-station bag clamps arranged front and back (such as Figure 20 , 21 shown) or bag clamps with more stations. Figure 20 , 21 The same reference numerals as Figure 16 , 18 , 17, 19 represent the same meanings.

[0120] The left bag clamping assembly 101 and the right bag clamping assembly 102 are respectively provided with independently controlled driving mechanisms to independently drive the bag clamps in the bag clamping assemblies. The driving mechanisms in the left bag clamping assembly 101 and the right bag clamping assembly 102 are respectively mounted on the left mounting seat 11 and the right mounting seat 12, and move together with the left mounting seat 11 and the right mounting seat 12 respectively, and can drive the bag clamps therein to open and close at any distance between the left bag clamping assembly 101 and the right bag clamping assembly 102.

[0121] Referring to Figures 29 - 33 , another bag clamping mechanism is exemplified as follows

[0122] The bag clamping mechanism provided by the present invention includes a bag clamping assembly and a mounting seat. There are two groups of bag clamping assemblies arranged left and right, numbered 101 and 102 respectively. Correspondingly, there are a left mounting seat 11 and a right mounting seat 12, which respectively mount the left bag clamping assembly 101 and the right bag clamping assembly 102. The structures of the two groups of bag clamping assemblies are the same. Hereinafter, one of the groups will be taken as an example for detailed description.

[0123] The bag clamping assembly is provided with a first bag clamping member 51 and a second bag clamping member 52. The first bag clamping member 51 and the second bag clamping member 52 are combined into a bag clamp. Both the first bag clamping member 51 and the second bag clamping member 52 adopt clamping blocks and are provided with flexible clamping block pads for flexible bag clamping. The bag clamping assembly is further provided with a power mechanism 70 and a plurality of bag clamps. The power mechanism 70 drives the plurality of bag clamps to rotate synchronously with their respective rotating shafts as fulcrums, and independently drives the bag clamps to open and close by the power mechanism 70. The power mechanisms of the left bag clamping assembly 101 and the right bag clamping assembly 102 are respectively arranged on the back surfaces of the mounting seats 11 and 12. The power mechanism 70 can adopt a cylinder or an electric cylinder and is controlled by a control mechanism 5.

[0124] The bag clamping assembly is further provided with a protective mounting member, and the protective mounting member is fixedly connected to the mounting seat (either the left mounting seat 11 or the right mounting seat 12 according to the position).

[0125] The power mechanism is provided with a rack transmission member 7, which is arranged inside a protective mounting member. The protective mounting member is fixedly connected to the mounting seat. The first bag clamping member 51 and the second bag clamping member 52 are mounted on the protective mounting member. The bag clamp formed by the combination of the first bag clamping member 51 and the second bag clamping member 52 is connected to the rack transmission member 7 through a gear.

[0126] The protective mounting member extends forward of the mounting seat in an arm shape, and its outer shape can be a thin cylindrical shape, a thin rectangular column shape or other shapes. The rear end of the protective mounting member is mounted in the mounting hole 10 of the mounting seat. The rack transmission member 7 is arranged along the length direction of the protective mounting member, and the plurality of bag clamps are arranged along the length direction of the protective mounting member.

[0127] The first bag clamping member 51 and the second bag clamping member 52 are respectively provided with gears 71 and 72. The gear 71 of the first bag clamping member is meshed and connected with the rack transmission member 7, and the gear 72 of the second bag clamping member is meshed and connected with the gear 71 of the first bag clamping member.

[0128] The rack transmission member 7 is provided with multiple sections of racks (in this embodiment, it is formed by connecting the first section 7a and the second section 7b). Each section of the rack corresponds to a bag clamp and is meshed with the gear 71 of the corresponding bag clamp. When multiple bag clamps are provided, the number of rack sections in the rack transmission member 7 and the number of bag clamps may not be equal and may be less than the number of bag clamps. In this way, the gear (such as gear 72) of one bag clamp is meshed and connected with the rack, and the gear (such as gear 71) of another bag clamp is driven to rotate through a gear connection structure or other transmission mechanisms and is connected with the gear (such as gear 72) meshed with the rack.

[0129] The bag clamp assembly is provided with a structure to prevent the rack transmission member 7 from rotating. The rotation refers to the rotation of the rack transmission member 7 parallel to the axis of the rack. The structure to prevent the rack transmission member from rotating includes: a guiding and positioning member 73 is arranged beside the rack transmission member 7 and is parallel and connected to it. The protective mounting member is provided with a guiding and positioning hole for the guiding and positioning member 73 to insert. The rack transmission member is also provided with a guiding part 74, and the protective mounting member is further provided with a guiding hole for the rack transmission member to insert and guide the guiding part 74. The connecting member 75 between the rack transmission member 7 and the guiding and positioning member 73 is also flat. A guiding hole 15 for the connecting member 75 is also provided in the mounting hole 10 to guide its forward and backward movement and prevent rotation. Further, an anti-rotation fit may also be provided between the protective mounting member and the mounting seat. For example, a plane is provided at the part where the protective mounting member is inserted into the mounting hole 10, or the outer contour of the cross-section of the part where the protective mounting member is inserted into the mounting hole 10 is rectangular.

[0130] The protective mounting member is composed of an upper component 61 and a lower component 62 connected together. The lower component 62 mounts the first bag clamping member 51 and the second bag clamping member 52. The upper component 61 is provided with holes for the shafts 510 and 520 of the first bag clamping member and the second bag clamping member to pass through. The gears 71 and 72 are arranged in the inner cavity formed by the combination of the upper component and the lower component.

[0131] The bag clamping mechanism is further provided with a horizontal linear adjustment mechanism and a horizontal linear guiding mechanism. The horizontal linear adjustment mechanism is provided with a power mechanism 20 of the adjustment mechanism. The left mounting seat 11, the right mounting seat 12 are connected to the horizontal linear adjustment structure and can be driven by the power mechanism of the adjustment mechanism to independently adjust the distance between the left and right groups of bag clamping components.

[0132] Figure 31 The horizontal linear adjustment mechanism may be a structure in which a motor drives a lead screw to move, driving the nut sleeves at both ends to move away from and close to each other, so as to adjust the distance between the bag clamps. It includes a horizontally arranged lead screw, left and right nut sleeves with opposite helix directions. The lead screw is a threaded rod 23, 24 with opposite left and right helix directions and is respectively connected to the left and right nut sleeves correspondingly. The left nut sleeve and the right nut sleeve are respectively arranged on the left mounting seat and the right mounting seat, and the left mounting seat and the right mounting seat can move in opposite directions synchronously. Figures 28 - 30 As shown, if a double-headed motor is adopted, the lead screw can also be composed of two horizontally arranged lead screws 23, 24 with opposite helix directions. The horizontal linear adjustment mechanism can also be a structure in which a gear and a rack cooperate.

[0133] The horizontal linear guiding mechanism includes a left slider 31 and its guide rail 33, a right slider 32 and its guide rail 34. The left mounting seat 11 and the right mounting seat 12 are respectively connected to the left slider 31 and the right slider 32. The guide rails 33, 34 are fixed on the mounting frame 4. Correspondingly, structures such as the power mechanism of the horizontal linear adjustment mechanism and the lead screw mounting frame of the adjustment mechanism can also be mounted on the mounting frame 4. The horizontal linear guiding mechanism can also adopt a structure of a sliding bearing and a slide bar.

[0134] The power device 20 is fixed on the mounting frame 4. The power device 20 can also be fixed on the turntable 300, or be fixed to both the mounting frame 4 and the turntable 300.

[0135] The cylinder of the bag clamping assembly is communicated with a controller (pneumatic control valve 5) through a connecting pipe 501. A control valve 5 is correspondingly arranged for each bag clamping mechanism (left bag clamping mechanism and right bag clamping mechanism). The control valve 5 is installed behind the mounting frame 4 and rotates together with the mounting frame. Each cylinder control valve 5 is connected to a transfer device 400 (pneumatic circuit distribution channel) through a connecting pipe 504. The transfer device 400 is fixedly installed at the upper end of the steering wheel spindle 600, is coaxial with the spindle 600 and rotates together with the spindle 600. The steering wheel 300 is fixedly connected to the spindle 600. The spindle 600 is rotationally connected to the outer shaft 601 through a bearing 602, and the outer shaft 601 is fixedly connected to the frame 700. The spindle 600 is a hollow shaft, and the air pipe line connecting the transfer device 400 to the outside runs through the spindle 600. The transfer device 400 and the control valve 5 can be separately arranged as described above, or the transfer device 400 can be an air circuit rotary distributor, and a control valve 5 corresponding to the power of each group of bag clamping mechanisms is arranged on the air circuit rotary distributor. The program gives signals to the control valve to control the opening and closing actions of the bag clamping mechanism.

[0136] At the position where it is specified to open the bag clamp, a control member 510 is provided. The control member 510 is connected to a power source (cylinder 511) and is driven by the cylinder 511 to control the timing of opening the control valve 5 (i.e., extending radially forward to cooperate with the control valve 5), and independently controls the control valves 5 of different bag clamping mechanisms. The mounting member (cylinder 511) of the control member 510 is fixedly installed. In this embodiment, it is fixedly installed on the upper end face of the outer shaft 601. The control member 510 cooperates with the cylinder control valve 5 that just passes in front of it to control the opening and closing of the cylinder control valve 5 and separately control the opening and closing of the bag clamp. The motor leads of each group of bag clamp adjusting mechanisms pass through the central hole of the spindle, and the leads are connected to a conductive mechanism 601 arranged at the bottom end of the spindle. The conductive mechanism 601 adopts a contact conductive method, such as a slip ring, a collector ring, etc.

[0137] If the power device of the bag clamping assembly uses an electric cylinder, the control valve 5 can be other electric controllers. The control member 510 is the corresponding controller. Or the control member 510 and the power of the control member can be replaced by a rotary controller. The rotary controller can adopt a rotary encoder. The rotary encoder is arranged on the spindle 600. By programming to set its specified rotation angle, it matches the position where the bag clamp needs to be controlled to open and close at the specified station. When it rotates to the specified angle, the rotary encoder sends information to the controller of the control valve 5, and the controller of the control valve 5 correspondingly controls the bag clamping mechanism reaching this position to perform opening and closing actions, which is convenient to control.

[0138] The working principle of the circulation mechanism of the present invention is as follows: the turntable power device 301 drives the main shaft 600 and the steering wheel 300 to rotate, driving several groups of bag clamping mechanisms to rotate according to the circulation motion route, thereby conveying. The bag clamp adjustment mechanism adjusts the distance between the left and right mounting seats 11 and 12 through the motor to adapt to the work needs of the station, such as: the distance needs to be reduced before the bag opening station, and the straightening action needs to be performed before the sealing station. The bag clamp assembly drives the bag clamp to open and close through the cylinder. At the bag feeding and bag discharging stations, the control component 510 controls the cylinder control valve 5 to open and close, and the bag clamp is opened to complete the bag receiving and bag delivery work. Similarly, at other stations where bags need to be rejected, such as any station after the bag opening and inspection station, a bag rejection station is set, and the bag clamp is opened in the above manner through program control to reject unqualified bags.

[0139] The following is a detailed description of the working mechanism of the bag-holding and inspection station of the present invention in conjunction with the accompanying drawings. The working mechanism is combined with the inspection structure, and during the bag bottom-holding work, the inspection work of whether the bag mouth is correctly opened is completed (or in other words, during the inspection work, it is also ensured that the bag bottom is uniformly held open). The working mechanism can also be set at the inspection station or bag bottom-holding station of the bag-feeding packaging machine to give the corresponding station additional functions.

[0140] The working mechanism includes a fixed bracket 800, a lifting bracket 81, a lifting power mechanism for driving the lifting bracket 81 to perform lifting movement, and a bag bottom supporting mechanism. The bag bottom supporting mechanism is provided with a bag bottom supporting member and a structure for supporting the bag wall. The bag bottom supporting mechanism is arranged on the lifting bracket 81.

[0141] The fixed bracket 800 is installed at the detection and bag bottom supporting station of the bag feeding and packaging machine, and the lifting guide rod 801 and the lifting drive mechanism (the electric cylinder 802 is used in this embodiment, and a cylinder or a motor can also be used) are fixed inside. The lifting bracket 81 is fixedly connected to the extension rod 803 of the electric cylinder 802, and a hole or guide sleeve 811 that cooperates with the guide rod 801 is provided.

[0142] The descending height of the bag bottom supporting mechanism is uniformly determined by the lifting power mechanism according to the set descending stroke. During the whole batch of work, the bag bottom supporting member descends to the same height, so that the shapes of the packaging bags in the same batch are as consistent as possible during filling.

[0143] The bag supporting bottom piece includes left and right bag supporting bottom pieces 82, and the bag supporting bottom piece is provided with a swing arm portion 821, and the swing arm portion serves as a supporting portion. The structure for supporting the bag wall includes the swing arm portion 821, a supporting drive mechanism 83 and an elastic reset mechanism 84 of the bag supporting bottom piece. The supporting drive mechanism drives the left and right bag supporting bottom pieces 82 to open, and supports the bag wall through the swing arm portion. When the bag bottom is pushed, the bag bottom supporting effect can be improved, and the ultimate goal of normal filling can be perfectly achieved.

[0144] The left and right bag bottom supporting members 82 are rotatably mounted on the lifting bracket 81 through a shaft 825. The reference numeral 812 in the drawing is the mounting hole of the shaft 825. The opening driving mechanism is mounted on the lifting bracket 81. The opening driving mechanism 83 is provided with a driving rod 831. The driving rod 831 is provided with a top block 832. The left and right bag bottom supporting members 82 are respectively provided with structures 822 that cooperate with the top block 832. When the top block 832 descends, they are acted on by the top block 832, so that the left and right bag bottom supporting members 82 rotate and open. The top block 832 can be provided with a symmetric inclined plane for acting on the structure 822. The structure 822 can adopt a roller, a shaft, etc. When the lifting bracket descends to the in-place position, that is, when the bag bottom supporting mechanism is pushed into the specified position at the bottom of the bag, the bag bottom supporting member opening driving mechanism 83 drives the top block to move downward, pushing open the structure 822, causing the bag bottom supporting member to rotate and the swing arm part of the bag bottom supporting member to open, completing the bag opening action.

[0145] The opening driving mechanism 83 can adopt a cylinder, a motor or an electric cylinder, etc. It is mounted on the lifting bracket 81 in a manner that can adjust the installation height. Thus, the swing angle of the bag bottom supporting member can also be adjusted by adjusting its height. The driving rod 831 passes through the lifting bracket 81 and is connected to the top block 832 at the bottom. The opening driving mechanism 83 can be provided with a connecting frame 833. The connecting frame 833 is connected to the lifting bracket 81. A long hole perpendicular to the horizontal plane is provided on the mounting member 834 of the driving mechanism 83. The long hole cooperates with the mounting hole on the connecting frame 833, so that different installation heights of the driving mechanism can be adjusted and obtained.

[0146] The lower ends 823 of the left and right bag bottom supporting members 82 are inclined and cooperate to form a cone. The cone is the functional part for pushing up the bag bottom. A cavity 824 is formed between the swing arm parts 821 of the left and right bag bottom supporting members. The detection piece installation and connection part of the bag opening detection mechanism is arranged in the cavity. The two ends of the elastic element 84 of the elastic reset mechanism are respectively connected to the left and right bag bottom supporting members 82, providing the functions of pushing up the bag bottom, opening the bag wall and installing the detection piece through a very compact structure.

[0147] The present invention also provides a bag opening detection mechanism for detecting whether the bag opening is opened. The bag opening detection mechanism is arranged on the lifting bracket 81.

[0148] The bag opening detection mechanism includes a detection piece mounting bracket 851, a sensor (not shown in the figure), a sensor bracket 852 and an elastic detection component 853. The lower end of the elastic detection component 853 is mounted on the detection piece mounting bracket 851 (it can be made integrally or connected by fasteners). The detection piece mounting bracket 851 is mounted on the lifting bracket 81. The sensor bracket 852 is mounted on the lifting bracket 81. The mounting bracket 851, as one part of the detection piece installation and connection part, is located in the cavity 824.

[0149] The elastic detection component 853 is provided with a detection portion 854 that cooperates with the bag opening. The upper part of the elastic detection component 853 cooperates with the sensor installed on the sensor bracket 852. The sensor can be a proximity switch. The elastic detection component 853 can be elastically deformed by pressure. If the bag opening is opened, the elastic detection component 853 can enter the bag together with the bag support bottom piece, and elastically deform by the compression of the bag wall, and disengage from the proximity switch to obtain a sensing signal of successful bag opening. If the bag opening is not opened or is not opened correctly, the bag support bottom piece 82 cannot enter the bag. Correspondingly, the elastic detection component 853 cannot enter the bag together with the bag support bottom piece 82. Then, the elastic detection component 853 will not be deformed by the resistance of the bag opening, so that it can detect whether the bag opening is opened correctly.

[0150] The elastic detection component 853 includes a left detection component and a right detection component. The lower part of the elastic detection component is located in the cavity 824 between the left and right bag bottom members in the bag bottom support mechanism. The upper part of the left and right detection components is cantilevered. In a free state, it passes through the through hole 826 on the left and right bag bottom members, and the part that passes through to the outside of the left and right bag bottom members is used as the detection part 854. The sensor and the sensor bracket are arranged on the outside of the top of the left and right bag bottom members, and a limit component 855 (for example, a bolt) at the upper end of the elastic detection component 853 can also be arranged thereon to protect the sensor. The left and right detection components can use spring pieces. The detection parts of the left and right detection components are in the shape of a hypotenuse that tilts upward and outward.

[0151] The detection of the bag opening detection mechanism can be performed before the lifting bracket 81 is lowered into place, or both can be performed at the same time. That is, the operation of the bag bottom support driving mechanism 83 and the operation of the bag opening detection mechanism can be performed at the same time or after the detection time of the bag opening detection mechanism.

[0152] The bag feeding and packaging method of the present invention is further described below in combination with the structure of the bag feeding and packaging machine according to the sequence of workstations, and includes the following workstation steps:

[0153] S1 bag storage and bag separation station: used for storing 200 bag stacks and arranging bag separation actions. The working device of this station is numbered 901. The work of this station can be completed by using the working device with corresponding functions of the bag storage and bag separation station of the existing bag feeding and packaging machine.

[0154] S2 bag picking and delivering station: It delivers the sorted bags to the circulating bag delivering device; this station is where the circulating mechanism and the working mechanism of the bag storage and bag sorting station complete the bag handover work.

[0155] The circulating bag feeding device receives the bag and circulates it through the power mechanism, and transports the bag to each workstation to complete the action of each workstation;

[0156] S3 Unzip the bag station: When the bag has a zipper, it is used to open the zipper at the bag mouth. When the bag is not a zipper bag, this step is omitted; the omission of this step means that at the unzip the bag station, the working device corresponding to the unzipping operation does not operate or the unzip the bag station is cancelled. In the present invention, for the unzipping operation, the bag mouth can be first pulled open a little by a suction cup, and then the two sides are clamped by clips and the zipper is pulled open outward. The reference numeral 903 in the attached drawing is the unzip the bag mechanism.

[0157] S4 Open the bag station: It is used for the opening action of the bag. Similarly, the bag opening work can also be completed by a displaceable suction cup. The reference numeral 904 in the attached drawing is the bag opening mechanism.

[0158] S6 Support the bottom of the bag station (named as the support the bottom of the bag + detection station in this embodiment, and the device reference numeral of this station is 906): It is used to detect whether the bag is successfully opened and judge whether the bag performs the next action; and, on the basis of opening the bag, further support the bottom of the bag to facilitate the operation of the next station. The detection station can also be separated from this station and set before or after this station.

[0159] In this embodiment, the detection work of the S5 station is integrated into the work of supporting the bottom of the bag at the S6 station and combined into one station; its working device adopts Figures 11 - 15 such a device.

[0160] S7 Filling station: It is used to fill materials into the bag. The reference numeral 907 in the attached drawing is the filling device for this station.

[0161] S8 Sealing station: It performs the sealing action on the filled bag. The reference numeral 908 in the attached drawing is the sealing device for this station.

[0162] In this embodiment, after the S8 sealing station, an S9 secondary sealing station is also provided: It is used to perform the second sealing action on the bag that has completed the first sealing, or perform the cooling function on the bag at the secondary sealing station, pause at one station for natural cooling, or a cooling structure can be set as required. The reference numeral 909 in the attached drawing is the secondary sealing device for this station.

[0163] It is determined whether to set the secondary sealing station according to actual needs. After the sealing station or the secondary sealing station, an S10 discharging station is also provided. The reference numeral 910 in the attached drawing is the device for this station.

[0164] In this embodiment, the bag picking and conveying station, the unzip the bag station, the open the bag station, the support the bottom and detection station, the filling station, the first sealing station, and the secondary sealing station are arranged in sequence along the circumferential direction.

[0165] Among them, for the zipper-opening operation A1, it can be carried out during the process of the circulating bag feeding device transporting the bag from the S2 station to the S3 station. First, the above-mentioned bag clip adjusting mechanism controlled by a separate program is used to complete the set moving distance. By shortening the distance between the left and right mounting seats 11 and 12, the distance between the left and right bag clips is reduced, and the bag mouth is further moved a certain distance towards the center of the bag, loosening the bag mouth and improving the success rate of the zipper-opening operation.

[0166] Among them, for the bag-opening operation A2, it can be carried out during the process of the circulating bag feeding device transporting the bag from the S3 station to the S4 station. First, the above-mentioned bag clip adjusting mechanism controlled by a separate program is used to complete the set moving distance. By shortening the distance between the left and right mounting seats 11 and 12, the distance between the left and right bag clips is reduced, and the bag mouth is further moved a certain distance towards the center of the bag, improving the bag-opening effect.

[0167] Among them, for A5, during the process of the bag being transported from the S7 station to the S8 station by the circulating bag feeding device, in process A5, the bag mouth can be straightened before sealing. This can also be completed by the above-mentioned bag clip adjusting mechanism. The above-mentioned bag clip adjusting mechanism controlled by a separate program is used to complete the set moving distance. By expanding the distance between the left and right mounting seats 11 and 12, the distance between the left and right bag clips is expanded to straighten the bag mouth.

[0168] In addition: Before the S3 station, a labeling and coding station (set before the bag is opened) can also be set. Rejection stations can be added to the stations after the S5 station and between the stations.

[0169] In addition, for A0: During the process of the bag passing through the S2 to the circulating bag feeding device, in process A0, the bag clamping mechanism for receiving the bag in the circulating bag feeding device can also have the function of yielding to the bag through the adjusting mechanism controlled by a separate program.

[0170] In Figure 4 D1 represents the bag with the zipper-opening bag mouth completed, D2 represents the bag with the bag-opening completed, D3 represents the bag with the bottom supported and the inspection qualified, D4 represents the bag with the material filled, D5 represents the bag after the first sealing, and D6 represents the bag after the second sealing.

[0171] Unless otherwise specified, in the present invention, if there are terms such as "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms used to describe the orientation or positional relationship in the present invention are only for exemplary illustration and should not be construed as a limitation on this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood in combination with the drawings and according to specific circumstances.

[0172] Unless otherwise clearly specified and defined, in the present invention, if there are terms such as "arranged", "clamped" and "connected", they 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A bag-feeding packaging machine, comprising a machine frame, a circulating bag-feeding device, a power device for driving the circulating bag-feeding device to rotate, and a plurality of bag-clamping mechanisms distributed along the circulating movement direction on the circulating bag-feeding device. The bag-clamping mechanisms are circulated through a plurality of workstations required from the bag-taking and feeding workstation to the sealing workstation and then back to the bag-taking and feeding workstation or from the bag-taking and feeding workstation to the discharging workstation and then back to the bag-taking and feeding workstation under the transportation of the circulating mechanism; characterized in that The bag clamping mechanism includes a bag clamping assembly and a bag clamp adjusting mechanism. The bag clamping assembly includes a left bag clamping assembly and a right bag clamping assembly. The left bag clamping assembly and the right bag clamping assembly are connected to the bag clamp adjusting mechanism. The bag clamp adjusting mechanism and the bag clamping assembly are driven by a separately controllable power device respectively. The bag clamp adjusting mechanism is driven by its power device to independently adjust the distance between the left bag clamping assembly and the right bag clamping assembly. The bag clamp assembly is provided with a first bag clamping member and a second bag clamping member, and the first bag clamping member and the second bag clamping member are combined into a bag clamp, and the power device of the bag clamp assembly is driven to move together with the bag clamp assembly by the bag clamp adjustment mechanism, and independently controls the opening and closing of the bag clamp in the bag clamp assembly; A working mechanism with a bag bottom supporting function is arranged at the inspection station or the bag bottom supporting station or the inspection and bag bottom supporting station, the working mechanism comprising a fixed bracket, a lifting bracket, a lifting power mechanism for driving the lifting bracket to perform lifting movement, and a bag bottom supporting mechanism, the bag bottom supporting mechanism is provided with a bag bottom supporting member and a structure for supporting the bag wall, and the bag bottom supporting mechanism is arranged on the lifting bracket; A bag opening detection mechanism is also arranged on the lifting bracket to detect whether the bag opening is opened; The bag opening detection mechanism includes a detection component mounting frame, a sensor, a sensor bracket and an elastic detection component. The lower end of the elastic detection component is mounted on the detection component mounting frame, the detection component mounting frame is mounted on a lifting bracket, and the sensor bracket is mounted on the lifting bracket; the upper part of the elastic detection component cooperates with the sensor mounted on the sensor bracket, the elastic detection component is provided with a detection portion that cooperates with the bag opening, and the elastic detection component can be elastically deformed under pressure.

2. The bag-feeding packaging machine according to claim 1, characterized in that The power device of the bag clamp adjustment mechanism adopts a motor, and the power device of the bag clamp assembly adopts a cylinder; the cylinder of the bag clamp assembly is connected to the control valve through a connecting pipe, and a control valve is correspondingly arranged for each group of bag clamping mechanisms. Each cylinder control valve is connected to a switching device through a connecting pipe. The switching device is fixedly installed on the upper end of the main shaft of the circulation mechanism, is coaxial with the main shaft and rotates with the main shaft.

3. The bag-feeding packaging machine according to claim 2, characterized in that A control component is provided at a designated position where the bag clamp needs to be opened. The control component is driven by power to control the opening timing, and the control component cooperates with the cylinder control valve to perform switch control.

4. The bag-feeding packaging machine according to claim 2, wherein The main shaft is rotatably connected to the outer shaft through a bearing, and the outer shaft is fixedly connected to the frame. The lead wire of the power device of each bag clamp adjustment mechanism passes through the center hole of the main shaft, and the lead wire is connected to the conductive mechanism arranged at the bottom end of the main shaft, and the conductive mechanism adopts a contact conductive method.

5. The bag-feeding packaging machine according to claim 1, characterized in that The power device of the bag clamp adjustment mechanism adopts a motor, and the power device of the bag clamp assembly adopts a cylinder; the cylinder of the bag clamp assembly is connected to the control valve through a connecting pipe, and a control valve is correspondingly arranged for each group of bag clamping mechanisms. The circulating bag feeding device is provided with a rotary controller, and the rotary controller is arranged on the main shaft of the circulating mechanism. The rotary controller is connected to the controller signal of the control valve.

6. The bag-feeding packaging machine according to claim 1, wherein The bag clamping mechanism includes a bag clamping assembly and a mounting seat. The bag clamping assembly is also provided with a power mechanism and a protective mounting member. The protective mounting member is fixedly connected to the mounting seat. The first bag clamping member is connected to the power mechanism, and the power mechanism independently drives the first bag clamping member to open and close.

7. The bag-feeding packaging machine according to claim 6, wherein In the bag clamping assembly, the power mechanism is arranged inside the protective mounting member.

8. The bag-feeding packaging machine according to claim 6, characterized in that The protective mounting member extends forward of the mounting base in an arm shape; the protective mounting member is a tubular component; the power mechanism in the bag clamping assembly uses a cylinder or an electric cylinder and is connected to the first bag clamping member through a movable connecting member.

9. The bag-feeding packaging machine according to claim 8, characterized in that The second bag clamping member is fixed to the end of the protective mounting member, the first bag clamping member is arranged outside the second bag clamping member and is hingedly mounted, and the movable connecting member is movably connected to the first bag clamping member; the power mechanism in the bag clamping assembly is movably connected to the connecting structure in the mounting hole of the mounting base, or is movably connected to the rear end of the protective mounting member, or is mounted behind the mounting base.

10. The bag-feeding packaging machine according to claim 9, wherein The movable connecting member includes a first movable connecting member and a second movable connecting member; the rear end of the first movable connecting member is connected to the extending rod of the power mechanism, the front end is rotatably connected to the rear end of the second movable connecting member, and the front end of the second movable connecting member is movably connected to the first bag clamping member.

11. The bag-feeding packaging machine according to claim 1, characterized in that The bag clamping mechanism includes a bag clamping assembly and a mounting base. The bag clamping assembly further includes a power mechanism and one, two or more than two bag clamps. The one, two or more than two bag clamps are driven by the power mechanism to synchronously rotate with their respective rotation axes as pivots, and the bag clamps are independently driven by the power mechanism to open and close.

12. The bag-feeding packaging machine according to claim 11, characterized in that The bag clamping assembly further includes a protective mounting member. The power mechanism is provided with a rack transmission member. The rack transmission member is arranged inside the protective mounting member. The protective mounting member is fixedly connected to the mounting base. The first bag clamping member and the second bag clamping member are mounted on the protective mounting member. The bag clamp formed by the combination of the first bag clamping member and the second bag clamping member is connected to the rack transmission member through a gear.

13. The bag-feeding packaging machine according to claim 12, wherein The protective mounting member extends forward of the mounting base in an arm shape. The rack transmission member is arranged along the length direction of the protective mounting member. The plurality of bag clamps are arranged along the length direction of the protective mounting member.

14. The bag-feeding packaging machine according to claim 12, wherein The first bag clamping member and the second bag clamping member are respectively provided with gears. The gear of the first bag clamping member is meshed and connected to the rack transmission member. The gear of the second bag clamping member is meshed and connected to the gear of the first bag clamping member.

15. The bag - feeding packaging machine according to claim 12, wherein The protective mounting member is formed by connecting an upper component and a lower component. The lower component mounts the first bag clamping member and the second bag clamping member. The upper component is provided with holes for the shafts of the first bag clamping member and the second bag clamping member to pass through. The gear is arranged in the inner cavity formed by the combination of the upper component and the lower component.

16. The bag-feeding packaging machine according to claim 12, wherein The rack transmission member is provided with multiple sections of racks, and each section of rack corresponds to one bag clamp.

17. A bag-feeding packaging machine according to claim 1, characterized in that The bag clamp adjusting mechanism includes a left mounting base, a right mounting base, a horizontal linear adjusting mechanism and a horizontal linear guiding mechanism. The horizontal linear adjusting mechanism is provided with a power mechanism. The left mounting base and the right mounting base respectively mount a left bag clamping assembly and a right bag clamping assembly; the left mounting base, the right mounting base and the horizontal linear adjusting mechanism are connected and can be driven by the power mechanism to independently adjust the distance between the left bag clamping assembly and the right bag clamping assembly.

18. A bag-feeding packaging machine according to claim 17, wherein The horizontal linear adjustment mechanism includes a horizontally arranged lead screw, a left internal thread member and a right internal thread member with opposite helix directions. The lead screw is a threaded rod with opposite left and right helix directions and is correspondingly connected to the left internal thread member and the right internal thread member respectively. The left internal thread member and the right internal thread member are respectively arranged on a left mounting seat and a right mounting seat, and the left mounting seat and the right mounting seat can move synchronously and in opposite directions.

19. A bag-feeding packaging machine according to claim 17, wherein The horizontal linear adjustment mechanism includes two lead screws with opposite helix directions arranged horizontally, a left internal thread member and a right internal thread member with opposite helix directions. The left internal thread member and the right internal thread member are correspondingly connected to the two lead screws with opposite helix directions respectively. The left internal thread member and the right internal thread member are respectively arranged on a left mounting seat and a right mounting seat, and the left mounting seat and the right mounting seat can move synchronously and in opposite directions.

20. A bag-feeding packaging machine according to claim 17, characterized in that The horizontal linear adjustment mechanism is a structure of a gear and a rack in cooperation.

21. A bag-feeding packaging machine according to claim 20, wherein In the horizontal linear adjustment mechanism, a left horizontal rack and a right horizontal rack are provided. The gear meshes with the left horizontal rack and the right horizontal rack to drive the left horizontal rack and the right horizontal rack to move synchronously and in opposite directions. The left mounting seat and the right mounting seat are respectively provided with the left horizontal rack and the right horizontal rack, and the left mounting seat and the right mounting seat can move synchronously and in opposite directions.

22. A bag-feeding packaging machine according to claim 17, characterized in that The bag clamping assemblies mounted on the left mounting seat and the right mounting seat are provided with single-station bag clamps, or multi-station bag clamps arranged in the front and rear with two or more than two.

23. A bag-feeding packaging machine according to claim 17, characterized in that The mounting frame of the bag clamping adjustment mechanism is fixed on the steering wheel of the bag-feeding packaging machine; the left bag clamping assembly and the right bag clamping assembly are respectively provided with independently controlled driving mechanisms to independently drive the bag clamps in the bag clamping assemblies. The driving mechanisms in the left bag clamping assembly and the right bag clamping assembly are respectively mounted on the left mounting seat and the right mounting seat and move together with the left mounting seat and the right mounting seat respectively.

24. The bag-feeding packaging machine according to claim 1, characterized in that The descending height of the bag bottom supporting mechanism is uniformly determined by the lifting power mechanism according to the set descending stroke.

25. A bag-feeding packaging machine according to claim 1, wherein The bag bottom supporting member is provided with a spreading part. The structure for spreading the bag wall includes the spreading part, a spreading driving mechanism and an elastic reset mechanism. The spreading driving mechanism drives the bag bottom supporting member to open and spreads the bag wall through the spreading part.

26. A bag-feeding packaging machine according to claim 25, wherein The bag bottom supporting member includes a left bag bottom supporting member and a right bag bottom supporting member. The left and right bag bottom supporting members are rotatably mounted on a lifting bracket. The spreading driving mechanism is mounted on the lifting bracket. The spreading driving mechanism is provided with a driving rod, and the driving rod is provided with a top block. The left and right bag bottom supporting members are respectively provided with parts cooperating with the top block and are acted upon when the top block descends, so that the left and right bag bottom supporting members rotate and open.

27. A bag-feeding packaging machine according to claim 26, characterized in that The spreading driving mechanism is adjustably mounted on the lifting bracket in terms of mounting height. The driving rod passes through the lifting bracket and is connected to the top block at the bottom.

28. A bag-feeding packaging machine according to claim 25, wherein The bag bottom supporting member includes a left bag bottom supporting member and a right bag bottom supporting member. The lower ends of the left and right bag bottom supporting members are inclined and cooperate to form a cone. The cone serves as the functional part for supporting the bag bottom. A cavity is formed between the swing arm parts of the left and right bag bottom supporting members. The detection part of the bag opening detection mechanism is installed and connected in the cavity; the two ends of the elastic element of the elastic reset mechanism are respectively connected to the left and right bag bottom supporting members.

29. A bag-feeding packaging machine according to claim 1, wherein The elastic detection component includes left and right detection components. The detection piece mounting bracket and the lower part of the elastic detection component are located in the cavity between the left and right bottom bag supporting pieces of the bottom bag supporting mechanism. The upper parts of the left and right detection components are in a cantilever shape. In the free state, they pass through the through holes on the left and right bottom bag supporting pieces, and the parts extending to the outside of the left and right bottom bag supporting pieces are used as the detection parts.

30. The bag-feeding packaging machine according to claim 1, characterized in that The detection component uses a spring piece, and its detection part is in the shape of an inclined hypotenuse that slopes upward and outward. The inductor and the inductor bracket are arranged on the outside of the tops of the left and right bottom bag supporting pieces, and a limiting component for the upper end of the elastic detection component is also arranged thereon.

31. The bag feeding and packaging method of a bag feeding packaging machine according to claim 1, characterized in that It includes the following station steps: S1 Bag storage and separation station: used for storing bag stacks and performing the actions of sorting and separating bags. S2 Bag picking and conveying station: used to send the sorted bags into the circulating bag conveying device. Circulating bag conveying device: After receiving the bags, it conveys them cyclically through the power mechanism, and conveys the bags to each station to complete the actions of each station. S3 Zip-opening bag station: When the bag has a zip, it is used to open the zip at the bag mouth. When the bag is not a zip bag, this step S3 is omitted. S4 Bag-opening station: used for the bag-opening action. S5 Detection station: used to detect whether the bag has been successfully opened and determine whether the bag will perform the next action. S6 Bottom bag supporting station: On the basis of opening the bag, further expand the bottom of the bag to facilitate the actions of the next station. Among them, the positions of S5 and S6 can be swapped or combined into one station. S7 Filling station: used for filling materials into the bags. S8 Sealing station: performs the sealing action on the filled bags.

32. The bag-feeding packaging method according to claim 31, wherein The omission of this step S3 in step S3 means that the working device corresponding to the zip-opening work does not operate or the zip-opening bag station is cancelled.

33. The bag-feeding packaging method according to claim 32, wherein After the S8 sealing station, an S9 secondary sealing station is also provided: used for performing the secondary sealing action on the bags that have completed the first sealing.

34. The bag-feeding packaging method according to claim 33, wherein The bag picking and conveying station, the zip-opening bag station, the bag-opening station, the detection station, the bottom bag supporting station, the filling station, the first sealing station, and the secondary sealing station are arranged in a circumferential direction.

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