Zipper opening device and packaging machine

Abstract

The present application relates to a zipper opening device and a packaging machine, wherein the zipper opening device comprises a fixed plate, a driving motor, a first transmission member movably connected, a second transmission member, a clamping claw structure, and a first matching structure and a second matching structure matching with the second transmission member and movably connected with the fixed plate; the first transmission member is connected with the driving motor and can rotate; the second transmission member moves in the up-down direction when the first transmission member rotates; the first matching structure has a bag-out position and a bag-in position relatively arranged in the front-to-back direction; the second matching structure has a clamping position and a clamping initial position relatively arranged in the front-to-back direction; the clamping claw structure comprises a movable clamping claw group movably connected with the first matching structure and a fixed clamping claw group fixedly connected with the first matching structure, the movable clamping claw group and the fixed clamping claw group comprise a swinging claw and a fixed claw, and the swinging claws of the movable clamping claw group and the fixed clamping claw group are movably connected with the second matching structure. The scheme has the advantages of compact structure and small footprint.

Description

Technical Field

[0001] The present application relates to the field of packaging technology, and in particular to a zipper opening device and a packaging machine. Background Art

[0002] As consumers have higher and higher requirements for the products they use, every link from product quality to packaging quality cannot be underestimated. However, the entire packaging machine is currently expensive and occupies a large area. In addition, the connection and flow between multiple processes is time-consuming and prone to errors. Summary of the invention

[0003] The purpose of the present application is to provide a zipper opening device and a packaging machine, which have the advantages of compact structure, small footprint, high production efficiency and high product quality.

[0004] The first aspect of the present disclosure provides a zipper opening device for a packaging machine, wherein the zipper opening device comprises a fixing plate fixedly connected to a frame of the packaging machine, and a zipper opening drive mechanism and a bag opening clamp mechanism installed on the fixing plate; wherein:

[0005] The zipper opening drive mechanism includes a drive motor, a first transmission member and a second transmission member; the first transmission member is connected to the drive motor and is used to rotate under the drive of the drive motor; the second transmission member has a first position, a second position, a third position and a fourth position arranged in sequence in the up-down direction, the second transmission member is movably connected to the first transmission member, and is used to move in the up-down direction when the first transmission member rotates;

[0006] The bag opening clamp mechanism includes a clamp structure and a first matching structure and a second matching structure matching with the second transmission member; the first matching structure and the second matching structure are both movably connected with the fixed plate; the first matching structure has a bag outlet position and a bag entry position relatively arranged in the front-to-back direction; the second matching structure has a clamping position and a clamping initial position relatively arranged in the front-to-back direction; the clamp structure includes an active clamp group movably connected with the first matching structure and a fixed clamp group fixedly connected with the first matching structure, the active clamp group and the fixed clamp group both include a swinging jaw and a fixed jaw, and the swinging jaws of the active clamp group and the fixed clamp group are movably connected with the second matching structure; wherein,

[0007] When the second transmission member switches between the first position and the second position, it can push the first matching structure to switch between the bag-out position and the bag-in position, and drive the clamping claw structure to move in the front-rear direction;

[0008] When the second transmission member switches between the second position and the third position, it can push the second matching structure to switch between the clamping position and the clamping initial position, and drive the swing claw to swing towards or away from the fixed claw;

[0009] When the second transmission member is switched between the third position and the fourth position, it can push the movable clamping jaw group to move up and down in a direction close to or away from the fixed clamping jaw group.

[0010] In an exemplary embodiment of the present disclosure, the second transmission member includes a first mating bearing, and the first mating structure includes a first mating plate and a first assembly seat;

[0011] The first matching plate has a first guide groove that is slidably matched with the first matching bearing, the first guide groove has a first vertical guide section and an inclined guide section arranged below the first vertical guide section, and the lower end of the inclined guide section is inclined in a direction away from the fixed plate;

[0012] The first assembly seat is fixedly connected to the first matching plate and the fixed jaw group, and is movably connected to the movable jaw group and the fixed plate, and the movable jaw group can move up and down relative to the fixed jaw group under the push of the second transmission member;

[0013] Wherein, when the second transmission member is in the first position, the first matching structure is in the pocketing position, and the first matching bearing is at the lowest end of the inclined guide section;

[0014] When the first mating bearing moves from the lowest end of the inclined guide section to the lowest end of the first vertical guide section, the second transmission member moves from the first position to the second position, and the first mating plate moves forward in the direction away from the fixed plate under the cooperation of the first mating bearing and the inclined guide section, so as to drive the first assembly seat and the clamping claw structure to move forward in the direction away from the fixed plate, so that the first mating structure moves from the bag entry position to the bag exit position.

[0015] In an exemplary embodiment of the present disclosure, the first assembly seat includes a first assembly plate, fixed rods fixedly connected to the upper and lower ends of the first assembly plate, and a guide rod fixedly connected between the upper and lower fixed rods; the fixed jaw group and the movable jaw group also include a jaw seat;

[0016] In the fixed jaw group and the movable jaw group: the swing jaw and the jaw seat are both hinged, and the fixed jaw and the jaw seat are both fixedly connected; and the jaw seat of the fixed jaw group is fixedly connected to the fixed rod at the lower end of the first assembly plate, and the jaw seat of the movable jaw group is movably connected to the guide rod, and the jaw seat of the movable jaw group can move up and down relative to the guide rod under the push of the second transmission member.

[0017] In an exemplary embodiment of the present disclosure, the guide rod is installed with a first return spring for ensuring that the clamping jaw seat of the movable clamping jaw group is always in the lower position.

[0018] In an exemplary embodiment of the present disclosure, the second transmission member further comprises a second matching bearing fixedly connected to the first matching bearing, and the second matching structure comprises a second matching plate, a pushing portion and a second assembly plate;

[0019] The lower end surface of the second matching plate is a guiding inclined surface capable of slidingly contacting with the second matching bearing, and the rear end surface of the second matching plate is a vertical plane, and the angle between the guiding inclined surface and the vertical plane is an obtuse angle;

[0020] The pushing portion is fixedly connected to the second matching plate;

[0021] The second assembly plate is connected to the pushing portion, and the second assembly plate has a second guide groove extending in the up-down direction;

[0022] The fixed jaw group and the swing jaw of the movable jaw group are both movably mounted on the second guide groove through a jaw bearing;

[0023] Among them, when the second transmission member switches between the second position and the third position, the first matching bearing can slide in the first vertical guide section, and the second matching bearing can abut against the guide slope to push the second matching plate, the pushing part and the second assembly plate to move forward and backward, and make the swing claws of the fixed jaw group and the movable jaw group swing in the direction close to or away from the corresponding fixed jaw under the action of the second guide groove.

[0024] In an exemplary embodiment of the present disclosure, the pushing portion includes a pushing rod and a limiting rod;

[0025] The push rod is fixedly connected to the second matching plate and is connected to the second assembly plate via a spring mounting rod;

[0026] The limiting rod is located on a side of the first assembly plate away from the fixed plate, and is fixedly connected to the fixed plate via a connecting rod and the pushing rod passing through the first assembly plate. The first assembly plate and the pushing rod can move in the front-rear direction relative to the connecting rod.

[0027] In an exemplary embodiment of the present disclosure, the swing claws of the movable jaw group and the fixed jaw group are also correspondingly provided with return spring rods, and the return spring rods pass through the limit rod and the first assembly plate to be connected with the swing claws;

[0028] and / or

[0029] The fixed claws of the movable claw group and the fixed claw group are inner claws that can extend into the packaging bag, and the swing claws are outer claws located outside the packaging bag.

[0030] In an exemplary embodiment of the present disclosure, the second transmission member further comprises a push plate fixedly connected to the first mating bearing, and a push plate bearing capable of mating with the push plate is disposed on the clamping jaw seat of the movable clamping jaw group;

[0031] Wherein, when the second transmission member switches between the third position and the fourth position, the first matching bearing can slide in the first vertical guide section, the second matching bearing can contact the vertical plane, and the push plate can contact the bearing on the jaw seat of the movable jaw group and push the movable jaw group to move up and down in a direction close to or away from the fixed jaw group;

[0032] Wherein, when the push plate contacts the bearing on the clamping jaw seat of the movable clamping jaw group, the fixed jaws and the swinging jaws of the movable clamping jaw group and the fixed clamping jaw group are in a clamping state.

[0033] In an exemplary embodiment of the present disclosure, the zipper opening device further comprises a transfer seat movably connected to the guide rod, the transfer seat can move up and down relative to the guide rod under the push of the second transmission member, and the transfer seat is fixedly connected to the clamping claw seat of the movable clamping claw group;

[0034] The zipper opening device further includes a third transmission member, the third transmission member including a transmission rod extending in the front-to-back direction and a front transmission seat and a rear transmission seat respectively arranged at the front and rear ends of the transmission rod, the transmission rod is movably mounted on the adapter seat, the transmission rod can move relative to the adapter seat in the front-to-back direction, the front transmission seat is fixedly connected to a transmission bearing, the rear transmission seat is fixedly connected to a pre-opening suction cup, and a second return spring is arranged between the rear transmission seat and the adapter seat;

[0035] The zipper opening device further comprises a swing rod, the swing rod is hinged to the fixed plate, and a third matching bearing is fixedly connected to the bottom of the swing rod;

[0036] The first guide groove further comprises a second vertical guide section disposed at the lower end of the inclined guide section, and the pre-opening suction cup comprises an avoidance position and a pre-bag opening position;

[0037] The first transmission member includes a transmission gear connected to the drive motor, and the second transmission member also includes a transmission rack and a transmission connection part, the transmission rack extends in the up-down direction and meshes with the transmission gear, and the transmission connection part is fixedly connected to the transmission rack, the first matching bearing, the second matching bearing and the push plate;

[0038] The second transmission member also has a fifth position. When the second transmission member is in the fifth position, the first matching bearing is at the lowest end of the second vertical guide section, and the pre-opening suction cup is in the avoidance position, which is used to avoid the suction cup of the bag taking device, so that the suction cup of the bag taking device can move in the up and down directions to realize the bag taking process; when the second transmission member is in the first position, the first matching bearing is at the connection between the second vertical guide section and the inclined guide section, and the pre-opening suction cup is in the pre-bag opening position, and can cooperate with the suction cup of the bag taking device to realize pre-bag opening;

[0039] Among them, when the first matching bearing moves from the lowest end of the inclined guide section to the lowest end of the second vertical guide section, the second transmission member moves from the first position to the fifth position, and the transmission rack moves downward and pushes the third matching bearing forward, so that the bottom of the swing rod moves forward, and the top of the swing rod moves backward and presses the transmission bearing to move backward, so that the third transmission member drives the pre-opening suction cup to move backward from the pre-bag opening position to the avoidance position.

[0040] A second aspect of the present disclosure provides a packaging machine, which includes a frame, a bag taking device and a zipper opening device as described in any one of the above items, wherein the bag taking device and the zipper opening device are both fixed on the frame, wherein the bag taking device is provided with a suction cup, and the suction cup can cooperate with the clamping claw structure.

[0041] The technical solution provided by this application can achieve the following beneficial effects:

[0042] The zipper opening device provided in the present application can realize the entire bag opening process together with the bag taking device through a driving motor, and has the advantages of compact structure, small footprint, high production efficiency, and high product quality.

[0043] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0045] Figure 1 A schematic diagram of the structure of a zipper opening device according to an embodiment of the present application at a first viewing angle is shown;

[0046] Figure 2 Shows Figure 1 The schematic structural diagram of the zipper opening device shown in the second viewing angle;

[0047] Figure 3 A schematic structural diagram of a zipper opening device according to another embodiment of the present application at a first viewing angle is shown;

[0048] Figure 4 Shows Figure 3 The schematic structural diagram of the zipper opening device shown in the second viewing angle;

[0049] Figure 5 Shows Figure 3 A schematic structural diagram of the first guide groove in the zipper opening device is shown.

[0050] Reference numerals

[0051] 10. Fixed plate; 11. Driving motor; 12a. Active jaw group; 12b. Fixed jaw group; 120. Swinging jaw; 121. Fixed jaw; 122. Jaw seat; 13. Pre-opening suction cup; 14. First matching bearing; 15. First matching plate; 150. First vertical guide section; 151. Inclined guide section; 152. Second vertical guide section; 16. First assembly plate; 17. Fixed rod; 18. Guide rod; 19. Second matching plate; 2 01. Push rod; 202. Limit rod; 203. Spring mounting rod; 21. Second assembly plate; 210. Second guide groove; 22. Gripping jaw bearing; 23. Return spring rod; 24. Push plate; 25. Transmission gear; 26. Transmission rack; 27. Transmission connection; 28. Push plate bearing; 29. ​​Adapter seat; 30. Transmission rod; 31. Front transmission seat; 32. Rear transmission seat; 33. Transmission bearing; 34. Swing rod; 35. Third matching bearing. DETAILED DESCRIPTION

[0052] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0053] Although relative terms such as "upper", "lower", "front" and "back" are used in this specification to describe the relative relationship of one device in the illustration to another device, these terms are used in this specification only for convenience, such as according to the direction of the examples described in the drawings. It is understood that if the device in the illustration is turned over so that it is upside down and front to back, the device described as being "upper" will become the device being "lower", and the device being "front" will become the device being "back". When a certain structure is "on" other structures, it may mean that the certain structure is formed integrally on the other structure, or that the certain structure is "directly" disposed on the other structure, or that the certain structure is "indirectly" disposed on the other structure through another structure.

[0054] The terms "a", "an", "the", and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express an open-ended inclusion and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc.; the terms "first" and "second", etc. are used merely as labels and are not intended to limit the quantity of their objects.

[0055] like Figures 1 to 5 As shown, the first aspect of the present disclosure provides a zipper opening device for a packaging machine, wherein the zipper opening device includes a fixing plate 10 fixedly connected to a frame of the packaging machine, and a zipper opening drive mechanism and a bag opening clamp mechanism installed on the fixing plate 10.

[0056] Specifically, the zipper opening drive mechanism includes a drive motor 11, a first transmission member and a second transmission member; the first transmission member is connected to the drive motor 11, and is used to rotate under the drive of the drive motor 11; the second transmission member has a first position, a second position, a third position and a fourth position arranged in sequence in the up and down directions, the second transmission member is movably connected to the first transmission member, and is used to move along the up and down directions when the first transmission member rotates; that is, when the first transmission member rotates, the second transmission member can move in the up and down directions in sequence in the fifth position, the first position, the second position, the third position and the fourth position.

[0057] It should be noted that the fifth position, first position, second position, third position and fourth position mentioned here are for a fixed point on the second transmission member. This fixed point can move in the fifth position, first position, second position, third position and fourth position in sequence when the first transmission member moves up and down as a whole.

[0058] For example, the fifth position may be the lowest position (ie, the lower position) to which the second transmission member moves, and the fourth position may be the highest position (ie, the uppermost position) to which the second transmission member moves.

[0059] The bag opening clamp mechanism may include a clamp structure and a first matching structure and a second matching structure matching with a second transmission member; the first matching structure and the second matching structure are both movably connected with the fixed plate 10, that is, the first matching structure and the second matching structure can move forward and backward relative to the fixed plate 10. The forward and backward movement mentioned here does not mean that the first matching structure and the second matching structure can move to the front and rear sides of the fixed plate 10, but that the first matching structure and the second matching structure move on the same side of the fixed plate 10 and can move in a direction close to or away from the fixed plate 10. Movement in a direction close to the fixed plate 10 can be understood as backward movement, and movement in a direction away from the fixed plate 10 can be understood as forward movement.

[0060] Among them, the first matching structure may have a bag-out position and a bag-in position relatively set in the front-to-back direction, that is, the first matching structure can switch between the bag-in position and the bag-out position when it moves forward and backward relative to the fixed plate 10. It should be noted that the bag-in position can be understood as the position where the inner clamping jaws of the clamping jaw structure extend into the packaging bag, and the bag-out position is the position where the inner clamping jaws of the clamping jaw structure extend out of the packaging bag. The second matching structure has a clamping position and an initial clamping position relatively set in the front-to-back direction, that is, the second matching structure can switch between the initial clamping position and the clamping position when it moves forward and backward relative to the fixed plate 10. It should be noted that the initial clamping position can be understood as the position where the clamping jaw structure does not start to clamp the packaging bag, and the clamping position refers to the position where the clamping jaw structure can clamp the packaging bag.

[0061] The clamping structure includes a movable clamping jaw group 12a movably connected to the first matching structure and a fixed clamping jaw group 12b fixedly connected to the first matching structure. The movable clamping jaw group 12a and the fixed clamping jaw group 12b both include a swinging jaw 120 and a fixed jaw 121. The swinging jaw 120 of the movable clamping jaw group 12a and the fixed clamping jaw group 12b are movably connected to the second matching structure.

[0062] Among them, when the second transmission member switches between the first position and the second position, it can push the first matching structure to switch between the bag outlet position and the bag inlet position, and drive the clamping jaw structure to move in the front and rear directions; specifically, when the second transmission member moves from the first position to the second position under the action of the drive motor 11 and the first transmission member, it pushes the first matching structure to move from the bag outlet position to the bag inlet position. At this time, the inner clamping jaws (one of the swinging jaws 120 and the fixed jaws 121) of the movable clamping jaw group 12a and the fixed clamping jaw group 12b can extend from the outside of the packaging bag into the packaging bag. At this time, the outer clamping jaw (the other of the swinging jaw 120 and the fixed jaw 121) moves with the inner clamping jaw, but the outer clamping jaw is always located outside the packaging bag.

[0063] When the second transmission member switches between the second position and the third position, it can push the second matching structure to switch between the clamping position and the clamping initial position, and drive the swing claw 120 to swing the clamping claw structure in the direction close to or away from the fixed claw 121 and move in the front-to-back direction; when the second transmission member moves from the second position to the third position under the action of the drive motor 11 and the first transmission member, it can push the second matching structure to move from the clamping initial position to the clamping position. At this time, the swing claw 120 swings in the direction close to the fixed claw 121 to realize the clamping process of the packaging bag.

[0064] When the second transmission member switches between the third position and the fourth position, it can push the movable jaw group 12a to move up and down in the direction close to or away from the fixed jaw group 12b; specifically, after completing the packaging bag clamping process, when the second transmission member moves from the third position to the fourth position under the action of the driving member and the first transmission member, it can push the movable jaw group 12a to move in the direction away from the fixed jaw group 12b to realize the bag opening process.

[0065] The zipper opening device provided in the present application can cooperate with the bag taking device to realize the entire bag opening process through a driving motor 11, and has the advantages of compact structure, small footprint, high production efficiency, and high product quality.

[0066] In an embodiment of the present disclosure, the first transmission member may include a transmission gear 25 connected to the drive motor 11, and the second transmission member may include a first matching bearing 14, a second matching bearing (not shown in the figure), a push plate 24, a transmission rack 26 and a transmission connection part 27. The transmission rack 26 extends in the up and down directions and meshes with the transmission gear 25. The transmission gear 25 rotates under the drive of the drive motor 11 and drives the transmission rack 26 to move in the up and down directions. The transmission rack 26 can also be fixedly connected to the first matching bearing 14, the second matching bearing and the push plate 24 through the transmission connection part 27. When the transmission rack 26 moves in the up and down directions, it can drive the first matching bearing 14, the second matching bearing and the push plate 24 to move in the up and down directions.

[0067] The first matching structure may include a first matching plate 15 and a first assembly seat; the first matching plate 15 has a first guide groove that is slidably matched with the first matching bearing 14, combined with Figures 1 to 5 As shown, the first guide groove has a first vertical guide section 150 and an inclined guide section 151 arranged below the first vertical guide section 150, and the lower end of the inclined guide section 151 is inclined in the direction away from the fixed plate 10; the first assembly seat is fixedly connected to the first matching plate 15 and the fixed jaw group 12b, and is movably connected to the movable jaw group 12a and the fixed plate 10, and the movable jaw group 12a can move up and down relative to the fixed jaw group 12b under the push of the second transmission member.

[0068] Among them, when the second transmission member is in the first position, the first matching structure is in the bag entering position, and the first matching bearing 14 is at the lowest end of the inclined guide section 151; when the first matching bearing 14 moves from the lowest end of the inclined guide section 151 to the lowest end of the first vertical guide section 150, the second transmission member moves from the first position to the second position, and the first matching plate 15 moves forward in the direction away from the fixed plate 10 under the cooperation of the first matching bearing 14 and the inclined guide section 151, so as to drive the first assembly seat and the clamping claw structure to move forward in the direction away from the fixed plate 10, so that the first matching structure moves from the bag exiting position to the bag entering position.

[0069] Specifically, the first assembly seat may include a first assembly plate 16, a fixed rod 17 fixedly connected to the upper and lower ends of the first assembly plate 16, and a guide rod 18 fixedly connected between the upper and lower fixed rods 17; the fixed jaw group 12b and the movable jaw group 12a also include a jaw seat 122; in the fixed jaw group 12b and the movable jaw group 12a: the swing jaw 120 and the jaw seat 122 are both hinged, and the fixed jaw 121 and the jaw seat 122 are both fixedly connected; and the jaw seat 122 of the fixed jaw group 12b is fixedly connected to the fixed rod 17 at the lower end of the first assembly plate 16, and the jaw seat 122 of the movable jaw group 12a is movably connected to the guide rod 18, and the jaw seat 122 of the movable jaw group 12a can move up and down relative to the guide rod 18 under the push of the second transmission member.

[0070] Among them, the guide rod 18 is installed with a first return spring to ensure that the clamping jaw seat 122 of the movable clamping jaw group 12a is always in the lower position. It should be understood that when the entire bag opening process is completed, the movable clamping jaw group 12a can fall freely to the normal position by its own gravity. The addition of the first return spring is mainly to ensure that the downward movement is in place and reliable. In addition, it should be noted that the lower position mentioned in this embodiment is the position of waiting to clamp the bag openings at both ends of the packaging bag (for example: zipper bag), that is, the maximum position at which the bag opening can be sucked open by the suction cup of the bag taking device when the zipper bag is not opened.

[0071] In some embodiments of the present disclosure, the second mating structure may include a second mating plate 19, a pushing portion and a second assembly plate 21; the lower end surface of the second mating plate 19 is a guiding inclined surface that can slide in contact with the second mating bearing, and the rear end surface of the second mating plate 19 is a vertical plane, and the angle between the guiding inclined surface and the vertical plane is an obtuse angle; the pushing portion is fixedly connected to the second mating plate 19; the second assembly plate 21 is connected to the pushing portion, and the second assembly plate 21 has a second guide groove 210 extending in the up and down directions; the swinging claws 120 of the fixed jaw group 12b and the movable jaw group 12a are both movably mounted in the second guide groove 210 through the jaw bearing 22.

[0072] Among them, when the second transmission member switches between the second position and the third position, the first matching bearing 14 can slide in the first vertical guide section 150, and the second matching bearing can abut against the guide slope to push the second matching plate 19, the pushing part and the second assembly plate 21 to move forward and backward, and make the swing claws 120 of the fixed jaw group 12b and the movable jaw group 12a swing in the direction close to or away from the corresponding fixed jaw 121 under the action of the second guide groove 210.

[0073] By way of example, the pushing portion may include a pushing rod 201 and a limiting rod 202; the pushing rod 201 is fixedly connected to the second mating plate 19, and is connected to the second assembly plate 21 via a spring mounting rod 203; the limiting rod 202 is located on the side of the first assembly plate 16 away from the fixed plate 10, and is fixedly connected to the fixed plate 10 via a connecting rod passing through the first assembly plate 16 and the pushing rod 201, the first assembly plate 16 and the pushing rod 201 can move in the front and rear directions relative to the connecting rod, such a design can ensure the accuracy and stability of each level of transmission on the one hand, and on the other hand make the structure more compact to reduce the space occupied by the entire zipper opening device.

[0074] For example, the swing claw 120 of the movable jaw group 12a and the fixed jaw group 12b is also correspondingly provided with a return spring rod 23, and the return spring rod 23 passes through the limit rod 202 and the first assembly plate 16 to be connected to the swing claw 120. When the second transmission member is used to return downward from the third position, the swing claw 120 can be returned to its position.

[0075] By way of example, the second transmission member also includes a push plate 24 fixedly connected to the first matching bearing 14, and a bearing capable of matching with the push plate 24 is provided on the jaw seat 122 of the movable jaw group 12a; wherein, when the second transmission member switches between the third position and the fourth position, the first matching bearing 14 can slide in the first vertical guide section 150, and the second matching bearing can contact with the vertical plane. At this time, the first matching bearing 14 and the second matching bearing will not affect the continued movement of the second transmission member, wherein the push plate 24 can contact with the bearing on the jaw seat 122 of the movable jaw group 12a, and push the movable jaw group 12a to move up and down in the direction of approaching or moving away from the fixed jaw group 12b; wherein, when the push plate 24 contacts with the bearing on the jaw seat 122 of the movable jaw group 12a, the fixed jaw 121 and the swing jaw 120 of the movable jaw group 12a and the fixed jaw group 12b are in a clamped state.

[0076] In some optional embodiments, such as Figure 1 As shown, the jaw seat 122 of the movable jaw group 12a is fixedly connected to the pre-opening suction cup 13. The pre-opening suction cup 13 can cooperate with the suction cup of the bag taking device to achieve pre-opening of the bag when the first matching structure is in the bag outlet position. It should be understood that the pre-opening process is achieved before the movable jaw group 12a and the fixed jaw group 12b clamp the packaging bag, that is, a small opening is first opened in the pre-opening bag, and then the inner jaw can be extended into the packaging bag, and then the zipper process is achieved.

[0077] In addition, it should be understood that the pre-opening suction cup 13 and the movable clamping jaw group 12a are not limited to the aforementioned connection relationship, and may also have the following connection relationship:

[0078] Combination Figures 3 to 5 As shown, the zipper opening device also includes an adapter seat 20 movably connected to the guide rod 18, the adapter seat 20 can move up and down relative to the guide rod 18 under the push of the second transmission member, and the adapter seat 20 is fixedly connected to the clamping claw seat 122 of the movable clamping claw group 12a; the zipper opening device also includes a third transmission member, the third transmission member includes a transmission rod 30 extending in the front and rear directions and a front transmission seat 31 and a rear transmission seat 32 respectively arranged at the front and rear ends of the transmission rod 30, the transmission rod 30 is movably installed on the adapter seat 20, the transmission rod 30 can move relative to the adapter seat 20 in the front and rear directions, the front transmission seat 31 is fixedly connected to a transmission bearing 33, the rear transmission seat 32 is fixedly connected to a pre-opening suction cup 13, and a second reset spring (not shown in the figure) is arranged between the rear transmission seat 32 and the adapter seat 20; the zipper opening device also includes a swing rod 34, the swing rod 34 is hinged to the fixed plate 10, and the bottom of the swing rod 34 is fixedly connected to a third matching bearing 35.

[0079] The first guide groove also has a second vertical guide section 152 arranged at the lower end of the inclined guide section 151. The pre-opening suction cup 13 has an avoidance position and a pre-bag opening position. When the pre-opening suction cup 13 is in the avoidance position, it is used to avoid the suction cup of the bag taking device, so that the suction cup of the bag taking device can move in the up and down directions to realize the bag taking process. When the pre-opening suction cup 13 is in the pre-bag opening position, it can cooperate with the suction cup of the bag taking device to realize the pre-bag opening process; the second transmission member also has a fifth position. When the second transmission member is in the fifth position, the first matching bearing 14 is at the lowest end of the second vertical guide section 152, and the pre-opening suction cup 13 is in the avoidance position. When the second transmission member is in the first position, the first matching bearing 14 is at the connection between the second vertical guide section 152 and the inclined guide section 151 (this connection can also be understood as the highest end of the second vertical guide section 152 or the lowest end of the inclined guide section 151), the pre-opening suction cup 13 is in the pre-bag opening position, and can cooperate with the suction cup of the bag taking device to realize pre-bag opening.

[0080] Among them, when the first matching bearing 14 moves from the lowest end of the inclined guide section 151 to the lowest end of the second vertical guide section 152, the second transmission member moves from the first position to the fifth position, and the transmission rack 26 moves down and pushes the third matching bearing 35 forward, so that the bottom of the swing rod 34 moves forward, and the top of the swing rod 34 moves backward and presses the transmission bearing 33 to move backward, so that the third transmission member drives the pre-opening suction cup 13 to move backward from the pre-bag opening position to the avoidance position, so that the movable clamping jaw group 12a makes way for the bag taking suction cup of the bag taking device to take the bag up and down.

[0081] When the first matching bearing 14 moves from the lowest end of the second vertical guide section 152 to the lowest end of the inclined guide section 151, the second transmission member moves from the fifth position to the first position, and the transmission rack 26 moves up, and the third matching bearing 35 moves backward, so that the bottom of the swing rod 34 moves backward and the top of the swing rod 34 moves forward. Under the action of the second return spring, the transmission bearing 33 moves forward, so that the third transmission member drives the pre-opening suction cup 13 to move forward from the avoidance position to the pre-bag opening position, so as to cooperate with the suction cup of the bag taking device to realize the action of pre-opening the bag mouth.

[0082] Based on the above structure, the specific bag opening process of the zipper opening device of the embodiment of the present disclosure is as follows:

[0083] When the second transmission member moves upward from the fifth position to the first position, the transmission rack 26 moves upward and the third matching bearing 35 moves backward, so that the bottom of the swing rod 34 moves backward and the top of the swing rod 34 moves forward. Under the action of the second reset spring, the transmission bearing 33 moves forward, so that the third transmission member drives the pre-opening suction cup 13 to move forward from the avoidance position to the pre-bag opening position, and then the bag taking device moves upward to fit with the pre-opening suction cup 13. After the pre-opening suction cup 13 sucks the bag opening at the upper end, the bag taking device moves downward, specifically to the position of the clamping jaw seat 122 of the fixed clamping jaw group 12b, so that the bag opening of the zipper bag is opened a small opening with the suction cup, thereby realizing the pre-bag opening process.

[0084] The second transmission member moves upward from the first position to the second position. In the process of moving upward from the first position to the second position, the first matching bearing 14 cooperates with the inclined guide section 151 of the first guide groove to enable the entire first matching structure to move forward from the bag-out position to the bag-in position. When the second transmission member is at the second position, the first matching structure moves to the bag-in position. At the same time, the clamping jaw structure as a whole moves into the front end of the bag taken out by the bag-taking device to move the movable clamping jaw group 12a and the fixed clamping jaw group 12b into place. At this time, one of the swinging claw 120 and the fixed claw 121 is an inner claw, that is, it extends into the bag opening, and the other is an outer claw, that is, it is located outside the bag. Optionally, as Figure 3 and Figure 4 As shown, the swing claw 120 is an outer claw located outside the packaging bag, and the fixed claw 121 is an inner claw that can extend into the packaging bag; or, as shown in Figure 1 and Figure 2 As shown, the swing claw 120 is an inner clamping claw that can extend into the packaging bag, and the fixed claw 121 is an outer clamping claw located outside the packaging bag, depending on the specific situation.

[0085] Then, the second transmission member continues to move upward, that is, from the second position to the third position. At this time, the first matching bearing 14 is located in the first vertical guide section 150 and moves upward in the first vertical guide section 150. Under the restriction of the first assembly plate 16 and the limit rod 202, the overall position of the first matching structure is fixed, and the second matching bearing begins to cooperate with the guide slope of the second matching plate 19 to push the second matching plate 19 to move forward. Since the push rod 201 is fixedly connected to the second matching plate 19, the push rod 201 also moves forward. A spring mounting rod 203 is installed between the push rod 201 and the second assembly plate 21, and the compression spring thereon is not drawn in the figure. When the push rod 201 is pushed forward, the second assembly plate 21 moves forward, and the bearing placed in the second guide groove 210 of the second assembly plate 21 drives the swing claw 120 to swing. When the swing claw 120 presses the fixed claw 121, the push rod 201 continues to move forward to further compress the compression spring placed on the spring mounting rod 203, thereby providing a clamping force between the swing claw 120 and the fixed claw 121, which is used to clamp the two ends of the bag.

[0086] After clamping the two ends of the bag mouth, the push plate 24 of the second transmission member hits the bearing behind the clamping claw seat 122 of the movable clamping claw group 12a, and the second transmission member continues to move upward, that is, from the third position to the fourth position, to push the clamping claw seat 122 of the movable clamping claw group 12a upward, thereby realizing the action of unzipping the zipper. After completion, the second transmission member is driven by the first transmission member and the drive motor 11 to return to the lower end and wait until the bag taking device has finished supplying bags to take out the next bag.

[0087] It should be understood that when the clamping jaw seat 122 of the movable clamping jaw group 12a is pushed upward, the adapter seat 20 and the third transmission member will also move upward together, and at the same time, the pre-opening suction cup 13 will also move upward together.

[0088] The disclosed embodiment also provides a packaging machine, comprising a frame, a bag taking device and a zipper opening device as described above, wherein the bag taking device and the zipper opening device are both fixed on the frame, wherein the bag taking device is provided with a suction cup, and the suction cup can cooperate with the aforementioned pre-open suction cup 13 and the clamping claw structure, which will not be described in detail here, and please refer to the aforementioned content for details.

[0089] It should be noted that the packaging machine is not limited to the aforementioned structures, but may also include other structures, such as packaging structures.

[0090] Those skilled in the art will readily appreciate other embodiments of the present application after considering the description and practicing the contents disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The description and embodiments are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the appended claims.

Claims

1. A zipper opening device for a packaging machine, characterized in that: The zipper opening device comprises a fixing plate fixedly connected to the frame of the packaging machine, and a zipper opening drive mechanism and a bag opening clamp mechanism installed on the fixing plate; wherein, The zipper opening drive mechanism includes a drive motor, a first transmission member and a second transmission member; the first transmission member is connected to the drive motor and is used to rotate under the drive of the drive motor; the second transmission member has a first position, a second position, a third position and a fourth position arranged in sequence in the up-down direction, the second transmission member is movably connected to the first transmission member, and is used to move in the up-down direction when the first transmission member rotates; The bag opening clamp mechanism includes a clamp structure and a first matching structure and a second matching structure matching with the second transmission member; the first matching structure and the second matching structure are both movably connected with the fixed plate; the first matching structure has a bag outlet position and a bag entry position relatively arranged in the front-to-back direction; the second matching structure has a clamping position and a clamping initial position relatively arranged in the front-to-back direction; the clamp structure includes an active clamp group movably connected with the first matching structure and a fixed clamp group fixedly connected with the first matching structure, the active clamp group and the fixed clamp group both include a swinging jaw and a fixed jaw, and the swinging jaws of the active clamp group and the fixed clamp group are movably connected with the second matching structure; wherein, When the second transmission member switches between the first position and the second position, it can push the first matching structure to switch between the bag-out position and the bag-in position, and drive the clamping claw structure to move in the front-rear direction; When the second transmission member switches between the second position and the third position, it can push the second matching structure to switch between the clamping position and the clamping initial position, and drive the swing claw to swing towards or away from the fixed claw; When the second transmission member is switched between the third position and the fourth position, it can push the movable clamping jaw group to move up and down in a direction close to or away from the fixed clamping jaw group.

2. The zipper opening device according to claim 1, characterized in that: The second transmission member includes a first matching bearing, and the first matching structure includes a first matching plate and a first assembly seat; The first matching plate has a first guide groove that is slidably matched with the first matching bearing, the first guide groove has a first vertical guide section and an inclined guide section arranged below the first vertical guide section, and the lower end of the inclined guide section is inclined in a direction away from the fixed plate; The first assembly seat is fixedly connected to the first matching plate and the fixed jaw group, and is movably connected to the movable jaw group and the fixed plate, and the movable jaw group can move up and down relative to the fixed jaw group under the push of the second transmission member; Wherein, when the second transmission member is in the first position, the first matching structure is in the pocketing position, and the first matching bearing is at the lowest end of the inclined guide section; When the first mating bearing moves from the lowest end of the inclined guide section to the lowest end of the first vertical guide section, the second transmission member moves from the first position to the second position, and the first mating plate moves forward in the direction away from the fixed plate under the cooperation of the first mating bearing and the inclined guide section, so as to drive the first assembly seat and the clamping claw structure to move forward in the direction away from the fixed plate, so that the first mating structure moves from the bag entry position to the bag exit position.

3. The zipper opening device according to claim 2, characterized in that: The first assembly seat includes a first assembly plate, fixed rods fixedly connected to the upper and lower ends of the first assembly plate, and a guide rod fixedly connected between the upper and lower fixed rods; the fixed jaw group and the movable jaw group also include a jaw seat; In the fixed jaw group and the movable jaw group: the swing jaw and the jaw seat are both hinged, and the fixed jaw and the jaw seat are both fixedly connected; and the jaw seat of the fixed jaw group is fixedly connected to the fixed rod at the lower end of the first assembly plate, and the jaw seat of the movable jaw group is movably connected to the guide rod, and the jaw seat of the movable jaw group can move up and down relative to the guide rod under the push of the second transmission member.

4. The zipper opening device according to claim 3, characterized in that: The guide rod is provided with a first return spring for ensuring that the clamping jaw seat of the movable clamping jaw group is always in the lower position.

5. The zipper opening device according to claim 4, characterized in that: The second transmission member further comprises a second matching bearing fixedly connected to the first matching bearing, and the second matching structure comprises a second matching plate, a pushing portion and a second assembly plate; The lower end surface of the second matching plate is a guiding inclined surface capable of slidingly contacting with the second matching bearing, and the rear end surface of the second matching plate is a vertical plane, and the angle between the guiding inclined surface and the vertical plane is an obtuse angle; The pushing portion is fixedly connected to the second matching plate; The second assembly plate is connected to the pushing portion, and the second assembly plate has a second guide groove extending in the up-down direction; The fixed jaw group and the swing jaw of the movable jaw group are both movably mounted on the second guide groove through a jaw bearing; Among them, when the second transmission member switches between the second position and the third position, the first matching bearing can slide in the first vertical guide section, and the second matching bearing can abut against the guide slope to push the second matching plate, the pushing part and the second assembly plate to move forward and backward, and make the swing claws of the fixed jaw group and the movable jaw group swing in the direction close to or away from the corresponding fixed jaw under the action of the second guide groove.

6. The zipper opening device according to claim 5, characterized in that: The pushing part includes a pushing rod and a limiting rod; The push rod is fixedly connected to the second matching plate and is connected to the second assembly plate via a spring mounting rod; The limiting rod is located on a side of the first assembly plate away from the fixed plate, and is fixedly connected to the fixed plate via a connecting rod and the pushing rod passing through the first assembly plate. The first assembly plate and the pushing rod can move in the front-rear direction relative to the connecting rod.

7. The zipper opening device according to claim 6, characterized in that: The movable jaw group and the swing jaw of the fixed jaw group are also correspondingly provided with return spring rods, and the return spring rods pass through the limit rod and the first assembly plate to be connected with the swing jaws; and / or The fixed claws of the movable claw group and the fixed claw group are inner claws that can extend into the packaging bag, and the swing claws are outer claws located outside the packaging bag.

8. The zipper opening device according to claim 7, characterized in that: The second transmission member further comprises a push plate fixedly connected to the first matching bearing, and a push plate bearing capable of matching with the push plate is arranged on the clamping jaw seat of the movable clamping jaw group; Wherein, when the second transmission member switches between the third position and the fourth position, the first matching bearing can slide in the first vertical guide section, the second matching bearing can contact the vertical plane, and the push plate can contact the bearing on the jaw seat of the movable jaw group and push the movable jaw group to move up and down in a direction close to or away from the fixed jaw group; Wherein, when the push plate contacts the bearing on the clamping jaw seat of the movable clamping jaw group, the fixed jaws and the swinging jaws of the movable clamping jaw group and the fixed clamping jaw group are in a clamping state.

9. The zipper opening device according to claim 8, characterized in that: The zipper opening device further comprises a transfer seat movably connected to the guide rod, the transfer seat can move up and down relative to the guide rod under the push of the second transmission member, and the transfer seat is fixedly connected to the clamping claw seat of the movable clamping claw group; The zipper opening device further includes a third transmission member, the third transmission member including a transmission rod extending in the front-to-back direction and a front transmission seat and a rear transmission seat respectively arranged at the front and rear ends of the transmission rod, the transmission rod is movably mounted on the adapter seat, the transmission rod can move relative to the adapter seat in the front-to-back direction, the front transmission seat is fixedly connected to a transmission bearing, the rear transmission seat is fixedly connected to a pre-opening suction cup, and a second return spring is arranged between the rear transmission seat and the adapter seat; The zipper opening device further comprises a swing rod, the swing rod is hinged to the fixed plate, and a third matching bearing is fixedly connected to the bottom of the swing rod; The first guide groove further comprises a second vertical guide section disposed at the lower end of the inclined guide section, and the pre-opening suction cup comprises an avoidance position and a pre-bag opening position; The first transmission member includes a transmission gear connected to the drive motor, and the second transmission member also includes a transmission rack and a transmission connection part, the transmission rack extends in the up-down direction and meshes with the transmission gear, and the transmission connection part is fixedly connected to the transmission rack, the first matching bearing, the second matching bearing and the push plate; The second transmission member also has a fifth position. When the second transmission member is in the fifth position, the first matching bearing is at the lowest end of the second vertical guide section, and the pre-opening suction cup is in the avoidance position, which is used to avoid the suction cup of the bag taking device, so that the suction cup of the bag taking device can move in the up and down directions to realize the bag taking process; when the second transmission member is in the first position, the first matching bearing is at the connection between the second vertical guide section and the inclined guide section, and the pre-opening suction cup is in the pre-bag opening position, and can cooperate with the suction cup of the bag taking device to realize pre-bag opening; Among them, when the first matching bearing moves from the lowest end of the inclined guide section to the lowest end of the second vertical guide section, the second transmission member moves from the first position to the fifth position, and the transmission rack moves downward and pushes the third matching bearing forward, so that the bottom of the swing rod moves forward, and the top of the swing rod moves backward and presses the transmission bearing to move backward, so that the third transmission member drives the pre-opening suction cup to move backward from the pre-bag opening position to the avoidance position.

10. A packaging machine, characterized in that: It comprises a frame, a bag taking device and a zipper opening device as described in any one of claims 1 to 9, wherein the bag taking device and the zipper opening device are both fixed on the frame, wherein the bag taking device is provided with a suction cup, and the suction cup can cooperate with the clamping claw structure.

Images