Bag clamping and conveying device for powder packaging bags
By designing a bag clamping and conveying device, which uses a swing seat and a rotary transmission mechanism to clamp the bag opening, the problem of bag opening deviation and tilting during the conveying process of powder packaging bags is solved, and stable clamping and accurate folding of the bag opening are achieved.
Patent Information
- Application Number
- CN202423295779.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-30
AI Technical Summary
During the powder packaging process, the sealed packaging bag may shift or tilt during transportation, resulting in inaccurate folding.
A bag clamping and conveying device for powder packaging bags was designed. The bag opening is clamped by a swing seat and a rotary transmission mechanism to ensure that the bag opening remains vertical during the conveying process. The stable clamping and conveying of the bag opening is achieved by using a swing force device and a synchronous linkage mechanism.
This ensures that the bag opening is vertical on the folding machine, improving the accuracy and stability of the folding, preventing the bag opening from shifting, and achieving efficient bag opening positioning and conveying.
Smart Images
Figure CN223631963U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to powder packing technical field especially, relates to a kind of powder packing bag's clamping bag conveying device. BACKGROUND
[0002] In powder packing technology, powder is filled into bag by packing machine and then conveyed to heat bonding machine by conveying belt for heat bonding, and heat bonding is mainly to seal the upper opening of the packing bag. The packing bag after heat bonding needs to be edge folded on edge folding machine, and since the packing bag after sealing may be inclined during conveying, the edge folding cannot be accurate every time if the bag opening is inclined during edge folding. SUMMARY
[0003] The utility model solves the technical problems that a kind of powder packing bag's clamping bag conveying device is provided, clamping bag conveying device can complete the clamping bag limiting of the upper bag opening of packing bag during the conveying of packing bag, to ensure that the bag opening of packing bag is in vertical state when entering bag edge folding machine, guarantee the accuracy of edge folding action.
[0004] To solve the above technical problems, the technical scheme of the utility model is as follows: a kind of powder packing bag's clamping bag conveying device, including rack, the rack is provided with mounting base, the mounting base is installed with the clamping conveying mechanism for clamping the bag opening of packing bag, the downstream of the clamping conveying mechanism on the rack is provided with the conveying roller line for supporting transport the packing bag, the clamping conveying mechanism includes first eccentric seat and second eccentric seat eccentrically installed on mounting base, the first eccentric seat and second eccentric seat are respectively installed first conveying frame and second conveying frame, the first conveying frame and second conveying frame are respectively installed with first conveyor pulley group and second conveyor pulley group, the first conveyor pulley group and second conveyor pulley group are respectively provided with first conveying belt and second conveying belt, the first driving wheel of first conveyor pulley group and the second driving wheel of second conveyor pulley group are respectively connected with rotary power device by rotary transmission mechanism, the first eccentric seat and second eccentric seat are driven by eccentric power device.
[0005] As a preferred solution, the first and second swing bases have the same structure, the first swing base comprises two swing rods and a first horizontal connecting beam, the upper ends of the swing rods are hinged to the mounting base, the two ends of the first horizontal connecting beam are connected to the lower ends of the two swing rods, the first and second conveying frames have the same structure, the first conveying frame comprises a conveying beam fixed to the first horizontal connecting beam, the first conveying pulley set comprises the first driving pulley and the first driven pulley and a plurality of intermediate conveying pulleys between the first driving pulley and the first driven pulley, the intermediate conveying pulleys are rotatably mounted on the conveying beam, the first driving pulley and the first driven pulley are rotatably mounted on the first driving pulley frame and the first driven pulley frame respectively, the first driving pulley frame and the second driving pulley frame are fixed to the first horizontal connecting beam and located at the two ends of the conveying beam, and the first conveying belt is installed between the first driving pulley and the first driven pulley.
[0006] As a preferred solution, the rotary power device is a rotary motor, the rotary motor is fixed to the mounting base, the rotary transmission mechanism comprises a driving gear and a driven gear rotatably mounted on the mounting base and mutually pinched, the driving gear is fixed to the output shaft of the rotary motor, the gear shaft of the driving gear and the wheel shaft of the first driving pulley are connected through a universal joint transmission shaft, and the gear shaft of the driven gear and the wheel shaft of the second driving pulley are also connected through a universal joint transmission shaft.
[0007] As a preferred solution, the swing power device comprises a swing cylinder, the swing cylinder is hinged between the swing rods of the first and second swing bases, and a synchronous connecting rod mechanism is arranged between the first and second swing bases.
[0008] As a preferred solution, the synchronous connecting mechanism comprises a first curved arm, a second curved arm and a synchronous connecting rod, the first curved arm is arranged on the swing rod of the first swing base, the second curved arm is arranged on the swing rod of the second swing base, the synchronous connecting rod is hinged between the first curved arm and the second curved arm, the hinged point between the synchronous connecting rod and the first curved arm is a first hinged point, the hinged point between the synchronous connecting rod and the second curved arm is a second hinged point, the first hinged point is located above the swing center of the first swing base, the second hinged point is located below the swing center of the second swing base, and the line connecting the swing center of the first swing base and the first hinged point and the line connecting the swing center of the second swing base and the second hinged point are parallel to each other.
[0009] As a preferred solution, the first and second swing bases are further provided with a constraint structure for constraining the bag opening of the packaging bag.
[0010] As a preferred scheme, the constraint structure comprises a first constraint plate fixed on the first horizontal connecting beam and a second constraint plate fixed on the second horizontal connecting beam of the second deflection seat, and the first constraint plate and the second constraint plate cooperatively constrain the bag opening of the packaging bag.
[0011] As a preferred scheme, the first constraint plate and the second constraint plate are installed in the same way, the side surface of the first constraint plate is provided with a connecting plate, the connecting plate is provided with a strip-shaped hole, a connecting bolt is constrained in the strip-shaped hole, and the connecting plate is fixed with the first horizontal connecting beam through the connecting bolt.
[0012] After the above technical scheme is adopted, the effect of the utility model is that: since the bag clamping and conveying device of the powder packaging bag comprises a rack, the rack is provided with a mounting base, the mounting base is provided with a clamping and conveying mechanism for clamping the bag opening of the packaging bag, the downstream of the clamping and conveying mechanism on the rack is provided with a conveying roller line for supporting and conveying the packaging bag, the clamping and conveying mechanism comprises a first deflection seat and a second deflection seat which are deflectedly mounted on the mounting base, the first deflection seat and the second deflection seat are respectively provided with a first conveying frame and a second conveying frame, the first conveying frame and the second conveying frame are respectively provided with a first conveying pulley set and a second conveying pulley set which are rotatably mounted, the first conveying pulley set and the second conveying pulley set are respectively provided with a first conveying belt and a second conveying belt, the first driving wheel of the first conveying pulley set and the second driving wheel of the second conveying pulley set are respectively connected with a rotary power device through a rotary transmission mechanism, and the first deflection seat and the second deflection seat are driven by a deflection power device; first, the first deflection seat and the second deflection seat are deflected by the deflection power device, so that the powder packaging bag is conveniently entered, then the rotary power device and the rotary transmission mechanism drive the first driving wheel and the second driving wheel, so that the first conveying belt and the second conveying belt start to drive, then the first deflection seat and the second deflection seat are deflected to reset, so that the upper bag opening of the powder packaging bag is clamped and conveyed at the same time, the surface of the first conveying belt and the second conveying belt can make the upper bag opening flat; the bag clamping and conveying device can clamp and limit the upper bag opening of the packaging bag during the conveying of the packaging bag, so that the bag opening of the packaging bag is in a vertical state when entering the bag opening flanging machine, and the accuracy of the flanging action is ensured.
[0013] The first and second eccentric seats are identical in structure, the first eccentric seat comprises two eccentric rods and a first horizontal connecting beam, the upper ends of the eccentric rods are hinged to the mounting seat, the two ends of the first horizontal connecting beam are connected to the lower ends of the two eccentric rods, the first and second conveying frames are identical in structure, the first conveying frame comprises a conveying beam fixed to the first horizontal connecting beam, the first conveying pulley set comprises the first driving pulley and the first driven pulley and a plurality of intermediate conveying pulleys between the first driving pulley and the first driven pulley, the intermediate conveying pulleys are rotatably installed on the conveying beam, the first driving pulley and the first driven pulley are rotatably installed on the first driving pulley frame and the first driven pulley frame respectively, the first driving pulley frame and the first driven pulley frame are fixed to the first horizontal connecting beam and located at the two ends of the conveying beam, and the first conveying belt is installed between the first driving pulley and the first driven pulley; the first conveying pulley set is also synchronously eccentric when the first eccentric seat is eccentric, and the stable and accurate clamping and conveying of the powder packaging bag are ensured.
[0014] The rotating power device is a rotating motor, the rotating motor is fixed to the mounting seat, the rotating transmission mechanism comprises a driving gear and a driven gear which are rotatably installed on the mounting seat and are mutually clamped, the driving gear is fixed to the output shaft of the rotating motor, the gear shaft of the driving gear and the wheel shaft of the first driving pulley are connected through a universal joint transmission shaft, and the gear shaft of the driven gear and the wheel shaft of the second driving pulley are also connected through a universal joint transmission shaft; the rotating motor drives the driving gear to rotate and drives the driven gear to rotate, the first driving pulley and the second driving pulley can be effectively driven, the first driving pulley and the second driving pulley can also be effectively driven when they are eccentric through the universal joint transmission shaft, and the use effect is improved.
[0015] The eccentric power device comprises an eccentric cylinder, the eccentric cylinder is hinged between the eccentric rods of the first and second eccentric seats, and a synchronous connecting rod mechanism is arranged between the first and second eccentric seats; the extension and contraction of the eccentric cylinder enable the first and second eccentric seats to be synchronously eccentric, and the stable clamping and conveying of the powder packaging bag are ensured.
[0016] And since the synchronous connecting mechanism comprises a first curved arm, a second curved arm and a synchronous connecting rod, the first curved arm is arranged on the swing rod of the first swing seat, the second curved arm is arranged on the swing rod of the second swing seat, and the synchronous connecting rod is hinged between the first curved arm and the second curved arm, the hinge point between the synchronous connecting rod and the first curved arm is a first hinge point, the hinge point between the synchronous connecting rod and the second curved arm is a second hinge point, the first hinge point is located above the swing center of the first swing seat, the second hinge point is located below the swing center of the second swing seat, and the line connecting the swing center of the first swing seat and the first hinge point and the line connecting the swing center of the second swing seat and the second hinge point are parallel to each other; therefore, when the first swing seat swings outward, the first curved arm swings inward, and the second curved arm is driven to swing outward through the synchronous connecting rod, linkage is formed, and synchronous swinging is ensured.
[0017] And since the first swing seat and the second swing seat are further provided with a constraint structure for constraining the bag opening of the powder packaging bag, the bag opening clamping and conveying effect of the powder packaging bag is further improved.
[0018] And since the constraint structure comprises a first constraint plate fixed on the first horizontal connecting beam and a second constraint plate fixed on the second horizontal connecting beam of the second swing seat, and the first constraint plate and the second constraint plate cooperate to constrain the bag opening of the packaging bag, the contact area with the powder packaging bag is increased, and the flatness of the bag opening during clamping is improved.
[0019] And since the first constraint plate and the second constraint plate are installed in the same way, the side surface of the first constraint plate is provided with a connecting plate, a strip-shaped hole is arranged on the connecting plate, a connecting bolt is constrained in the strip-shaped hole, and the connecting plate is fixed with the first horizontal connecting beam through the connecting bolt; the installation positions of the first constraint plate and the second constraint plate can be adjusted along the extension direction of the strip-shaped hole through the strip-shaped hole, so that the distance between the first constraint plate and the second constraint plate is changed, and different packaging bags are adapted. BRIEF DESCRIPTION OF DRAWINGS
[0020] The utility model will be further explained in connection with the drawings and examples.
[0021] Figure 1 is the perspective view of the utility model embodiment;
[0022] Figure 2 is the structure schematic view of the utility model embodiment;
[0023] Figure 3 is the structure schematic view of the utility model embodiment A place;
[0024] Figure 4 is the structure schematic view of the first conveying frame and the second conveying frame of the utility model embodiment;
[0025] In the drawing: 1, frame; 2, mounting seat; 3, first deflection seat; 4, second deflection seat; 5, first conveying belt; 6, second conveying belt; 7, first driving wheel; 8, second driving wheel; 9, deflection rod; 10, first horizontal connecting beam; 11, conveying beam; 12, first driven wheel; 13, intermediate conveying wheel; 14, first driving wheel frame; 15, first driven wheel frame; 16, second horizontal connecting beam; 17, second driven wheel; 18, second driving wheel frame; 19, second driven wheel frame; 20, rotary motor; 21, driving gear; 22, driven gear; 23, deflection cylinder; 24, first curved arm; 25, second curved arm; 26, synchronous connecting rod; 27, first hinged point; 28, second hinged point; 29, first constraint plate; 30, second constraint plate; 31, connecting plate; 32, strip-shaped hole; 33, connecting bolt. DETAILED DESCRIPTION
[0026] The utility model will be described in further detail below through specific examples.
[0027] As Figures 1 to 4 shown in the drawing, a bag clamping and conveying device for powder packaging bags comprises a frame 1, the frame 1 is provided with a mounting seat 2, the mounting seat 2 is installed with a clamping and conveying mechanism for clamping the bag opening of a packaging bag, the frame 1 is provided with a conveying roller line downstream of the clamping and conveying mechanism for supporting the transportation of the packaging bag, the clamping and conveying mechanism comprises a first deflection seat 3 and a second deflection seat 4 which are deflectionally mounted on the mounting seat 2, the first deflection seat 3 and the second deflection seat 4 are respectively installed with a first conveying frame and a second conveying frame, the first conveying frame and the second conveying frame are respectively rotatably installed with a first conveying belt 5 wheel set and a second conveying belt 6 wheel set, the first conveying belt 5 wheel set and the second conveying belt 6 wheel set are respectively provided with a first conveying belt 5 and a second conveying belt 6, the first driving wheel 7 of the first conveying belt 5 wheel set and the second driving wheel 8 of the second conveying belt 6 wheel set are respectively connected with a rotary power device through a rotary transmission mechanism, and the first deflection seat 3 and the second deflection seat 4 are driven by a deflection power device.
[0028] As Figure 2As shown, the first and second yawing seats 3 and 4 are identical in structure, the first yawing seat 3 comprises two yawing rods 9 and a first horizontal connecting beam 10, the upper ends of the yawing rods 9 are hinged to the mounting seat, the two ends of the first horizontal connecting beam 10 are connected to the lower ends of the two yawing rods 9, the first and second conveying frames are identical in structure, the first conveying frame comprises a conveying beam 11 fixed to the first horizontal connecting beam 10, the first conveying belt 5 wheel set comprises the first driving wheel 7 and the first driven wheel 12, and a plurality of intermediate conveying wheels 13 between the first driving wheel 7 and the driven wheel, the intermediate conveying wheels 13 are rotatably mounted on the conveying beam 11, the first driving wheel 7 and the first driven wheel 12 are rotatably mounted on the first driving wheel frame 14 and the first driven wheel frame 15 respectively, the first driving wheel frame 14 and the second driving wheel frame 18 are fixed to the first horizontal connecting beam 10 and located at the two ends of the conveying beam 11, and the first conveying belt 5 is installed between the first driving wheel 7 and the first driven wheel 12;
[0029] The second yawing seat 4 also has two yawing rods 9 and a second horizontal connecting beam 16, and the second conveying frame is provided with a conveying beam 11 mounted on the second horizontal connecting beam 16, the second conveying belt 6 wheel set comprises the second driving wheel 8 and the second driven wheel 17, and a plurality of intermediate conveying wheels 13 are also provided between the second driving wheel 8 and the second driven wheel 17 and mounted on the conveying beam 11, and the second driving wheel 8 and the second driven wheel 17 are also mounted on the second driving wheel frame 18 and the second driven wheel frame 19 respectively, and the second driving wheel frame 18 and the second driven wheel frame 19 are also located at the two ends of the conveying beam 11, and the second conveying belt 6 is located between the second driving wheel 8 and the second driven wheel 17; to ensure that the first conveying belt 5 wheel set also synchronously yaw when the first yawing seat 3 yaws, and the second yawing seat 4 and the second conveying belt 6 wheel set are also the same, to ensure the stability and accuracy of clamping and conveying the packaging bag of the powder material.
[0030] In the embodiment, the rotary power device is a rotary motor 20, the rotary motor 20 is fixed to the mounting seat 2, the rotary transmission mechanism comprises a driving gear 21 and a driven gear 22 which are mutually clamped and rotatably mounted on the mounting seat 2, the driving gear 21 is fixed to the output shaft of the rotary motor 20, the gear shaft of the driving gear 21 and the wheel shaft of the first driving wheel 7 are connected by a universal joint transmission shaft, and the gear shaft of the driven gear 22 and the wheel shaft of the second driving wheel 8 are also connected by a universal joint transmission shaft; first, the rotary motor 20 drives the driving gear 21 to rotate to drive the driven gear 22 to rotate, which can effectively drive the first driving wheel 7 and the second driving wheel 8, and through the universal joint transmission shaft, the first driving wheel 7 and the second driving wheel 8 can also be effectively driven when yawing, improving the use effect; the universal joint transmission shaft is a structure existing on the market, which is not shown in the drawing and will not be described in detail.
[0031] Further, the swing power device comprises a swing cylinder 23, which is hinged between the swing rod 9 of the first swing seat 3 and the swing rod 9 of the second swing seat 4, and a synchronous connecting rod 26 is arranged between the first swing seat 3 and the second swing seat 4; the swing cylinder 23 is extended and retracted to make the first swing seat 3 and the second swing seat 4 swing synchronously, thereby ensuring the stability of the clamped and conveyed powder packaging bag.
[0032] As shown in Figure 3 the synchronous connecting mechanism comprises a first curved arm 24, a second curved arm 25 and a synchronous connecting rod 26, the first curved arm 24 is arranged on the swing rod 9 of the first swing seat 3, the second curved arm 25 is arranged on the swing rod 9 of the second swing seat 4, and the synchronous connecting rod 26 is hinged between the first curved arm 24 and the second curved arm 25, the hinged point between the synchronous connecting rod 26 and the first curved arm 24 is a first hinged point 27, the hinged point between the synchronous connecting rod 26 and the second curved arm 25 is a second hinged point 28, the first hinged point 27 is located above the swing center of the first swing seat 3, the second hinged point 28 is located below the swing center of the second swing seat 4, and the line connecting the swing center of the first swing seat 3 and the first hinged point 27 is parallel to the line connecting the swing center of the second swing seat 4 and the second hinged point 28; therefore, when the first swing seat 3 swings outward, the first curved arm 24 will swing inward, and the second curved arm 25 will be driven to swing outward by the synchronous connecting rod 26, thereby forming linkage and ensuring synchronous swing.
[0033] As shown in Figure 2 the first swing seat 3 and the second swing seat 4 are further provided with a constraint structure for constraining the bag opening of the packaging bag; thereby further improving the clamping and conveying effect of the bag opening of the powder packaging bag.
[0034] Further, the constraint structure comprises a first constraint plate 29 fixed on the first horizontal connecting beam 10 and a second constraint plate 30 fixed on the second horizontal connecting beam 16 of the second swing seat 4, and the first constraint plate 29 and the second constraint plate 30 cooperate to constrain the bag opening of the packaging bag; thereby increasing the contact area with the powder packaging bag and improving the flatness of the bag opening during clamping.
[0035] The first constraint plate 29 and the second constraint plate 30 are installed in the same way, the side of the first constraint plate 29 is provided with a connecting plate 31, the connecting plate 31 is provided with a strip-shaped hole 32, a connecting bolt 33 is constrained in the strip-shaped hole 32, and the connecting plate 31 is fixed with the first horizontal connecting beam 10 through the connecting bolt 33; the second constraint plate 30 is also provided with a connecting plate 31, which is installed on the second horizontal connecting beam 16 through the strip-shaped hole 32, and the installation positions of the first constraint plate 29 and the second constraint plate 30 can be adjusted along the extending direction of the strip-shaped hole 32 through the strip-shaped hole 32, so that the distance between the first constraint plate 29 and the second constraint plate 30 is changed, and different packaging bags are adapted.
[0036] The working principle of the embodiment is as follows: first, the first swing seat 3 and the second swing seat 4 are driven to swing outward by the swing cylinder 23, then the driving gear 21 is driven to rotate by the rotating motor 20, the driven gear 22 is driven to rotate, the first driving wheel 7 and the second driving wheel 8 are driven by the universal joint transmission shaft, the first conveying belt 5 and the second conveying belt 6 are driven to convey, after the powder packaging bag is conveyed, the first swing seat 3 and the second swing seat 4 are driven to swing inward, the first constraint plate 29 and the second constraint plate 30 cooperate to constrain the bag opening of the packaging bag, and the packaging bag is conveyed to the downstream conveying roller line.
[0037] The above-described embodiment is only a description of the preferred embodiment of the utility model, and is not used as a limitation on the range of the utility model. On the basis of not departing from the design spirit of the utility model, various deformations and modifications of the technical scheme of the utility model are all within the protection range determined by the claims of the utility model.
Claims
1. A bag clamping and conveying device for powder packaging bags, comprising a frame, characterized in that: The rack is provided with a mounting base, a clamping conveying mechanism for clamping the bag opening of a packaging bag is mounted on the mounting base, a conveying roller line for supporting the transportation of the packaging bag is arranged downstream of the clamping conveying mechanism on the rack, the clamping conveying mechanism comprises a first deflection seat and a second deflection seat which are deflectedly mounted on the mounting base, the first deflection seat and the second deflection seat are respectively provided with a first conveying frame and a second conveying frame, the first conveying frame and the second conveying frame are respectively provided with a first conveying pulley set and a second conveying pulley set which are rotatably mounted, the first conveying pulley set and the second conveying pulley set are respectively provided with a first conveying belt and a second conveying belt, a first driving wheel of the first conveying pulley set and a second driving wheel of the second conveying pulley set are respectively connected with a rotary power device through a rotary transmission mechanism, and the first deflection seat and the second deflection seat are driven by a deflection power device.
2. A bag clamping and conveying device for powder packaging bags as claimed in claim 1, characterized in that: The first deflection seat and the second deflection seat are the same in structure, the first deflection seat comprises two deflection rods and a first horizontal connecting beam, the upper ends of the deflection rods are hinged to the mounting seat, the two ends of the first horizontal connecting beam are connected with the lower ends of the two deflection rods, the first conveying frame and the second conveying frame are the same in structure, the first conveying frame comprises a conveying beam which is fixed to the first horizontal connecting beam, the first conveying pulley set comprises the first driving wheel, a first driven wheel and a plurality of intermediate conveying wheels which are between the first driving wheel and the driven wheel, the intermediate conveying wheels are rotatably mounted on the conveying beam, the first driving wheel and the first driven wheel are rotatably mounted on a first driving wheel frame and a first driven wheel frame, the first driving wheel frame and the second driving wheel frame are fixed to the first horizontal connecting beam and located at the two ends of the conveying beam, and the first conveying belt is mounted between the first driving wheel and the first driven wheel.
3. A bag gripping and conveying device for powder packaging bags as claimed in claim 2, characterized in that: The rotary power device is a rotary motor which is fixed to the mounting base, the rotary transmission mechanism comprises a driving gear and a driven gear which are rotatably mounted on the mounting base and are mutually pinched, the driving gear is fixed to the output shaft of the rotary motor, the gear shaft of the driving gear and the wheel shaft of the first driving wheel are connected through a universal joint transmission shaft, and the gear shaft of the driven gear and the wheel shaft of the second driving wheel are also connected through a universal joint transmission shaft.
4. A bag gripping and conveying device for powder packaging bags as claimed in claim 3, characterized in that: The deflection power device comprises a deflection cylinder which is hinged between the deflection rods of the first deflection seat and the second deflection seat, and a synchronous connecting rod mechanism is arranged between the first deflection seat and the second deflection seat.
5. A bag gripping and conveying device for powder packaging bags as claimed in claim 4, characterized in that: The synchronous connecting rod mechanism comprises a first curved arm, a second curved arm and a synchronous connecting rod, the first curved arm is arranged on the swing rod of the first swing seat, the second curved arm is arranged on the swing rod of the second swing seat, and the synchronous connecting rod is hinged between the first curved arm and the second curved arm, the hinge point between the synchronous connecting rod and the first curved arm is a first hinge point, the hinge point between the synchronous connecting rod and the second curved arm is a second hinge point, the first hinge point is located above the swing center of the first swing seat, the second hinge point is located below the swing center of the second swing seat, and the line connecting the swing center of the first swing seat and the first hinge point and the line connecting the swing center of the second swing seat and the second hinge point are parallel to each other.
6. A bag gripping and conveying device for powder packaging bags as claimed in claim 5, characterized in that: The first swing seat and the second swing seat are further provided with a constraint structure for constraining the bag opening of the packaging bag.
7. A bag gripping and conveying device for powder packaging bags as claimed in claim 6, characterized in that: The constraint structure comprises a first constraint plate fixed on the first horizontal connecting beam and a second constraint plate fixed on the second horizontal connecting beam of the second swing seat, and the first constraint plate and the second constraint plate cooperate to constrain the bag opening of the packaging bag.
8. A bag gripping and conveying device for powder packaging bags as claimed in claim 7, characterized in that: The first constraint plate and the second constraint plate are installed in the same way, the side surface of the first constraint plate is provided with a connecting plate, the connecting plate is provided with a strip-shaped hole, a connecting bolt is constrained in the strip-shaped hole, and the connecting plate is fixed with the first horizontal connecting beam through the connecting bolt.