Packaging bag clamping and stretching device and packaging production line

Abstract

The utility model discloses a packaging bag clamping and stretching device and a packaging production line, the packaging bag clamping and stretching device comprises a synchronous opening and closing assembly and a clamping assembly, the synchronous opening and closing assembly comprises an opening and closing driving mechanism, a synchronous transmission mechanism and a plurality of movable parts, the movable parts are in transmission connection with the driving end of the opening and closing driving mechanism through the synchronous transmission mechanism, the opening and closing driving mechanism drives the movable parts to synchronously get close to each other or get away from each other through the synchronous transmission mechanism, the multiple clamping assemblies comprise clamping driving mechanisms and clamping jaws, the clamping driving mechanisms are arranged on the movable parts, and the clamping jaws are arranged on the clamping driving mechanisms. And the driving end of the clamping driving mechanism is in transmission connection with the clamping jaw so as to drive the clamping jaw to clamp or open. By means of the packaging bag clamping and stretching device, when follow-up sealing operation is carried out, the opening of the packaging bag can be stretched to be flat, the position of the opening of the packaging bag is kept accurate, and the problems that a sealing opening is wrinkled, and the sealing position is not ideal can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging equipment, in particular to a packaging bag clamping and stretching device and a packaging production line. Background Art

[0002] On the semiconductor packaging production line, most of the sealing of the bag mouth is done directly on the assembly line. Due to the characteristics of the packaging bag, the flatness and accuracy of the sealing position cannot be ensured during sealing. Direct sealing of the bag will lead to defects such as sealing wrinkles and unsatisfactory sealing position. Summary of the invention

[0003] In view of this, the first object of the utility model is to provide a packaging bag clamping and stretching device to stretch the packaging bag flat during the sealing operation to avoid problems such as sealing wrinkles and unsatisfactory sealing position.

[0004] Another object of the utility model is to provide a packaging production line including the packaging bag clamping and stretching device.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A packaging bag clamping and stretching device, comprising:

[0007] A synchronous opening and closing assembly, the synchronous opening and closing assembly comprising an opening and closing drive mechanism, a synchronous transmission mechanism and a plurality of movable parts, each of the movable parts being transmission-connected to a driving end of the opening and closing drive mechanism through the synchronous transmission mechanism, and the opening and closing drive mechanism driving each of the movable parts to synchronously approach or move away from each other through the synchronous transmission mechanism;

[0008] A plurality of clamping assemblies, wherein the clamping assemblies include a clamping drive mechanism and a clamping claw. The clamping drive mechanism is arranged on the movable part, and the driving end of the clamping drive mechanism is transmission-connected with the clamping claw to drive the clamping claw to clamp or open.

[0009] Optionally, the synchronous transmission mechanism includes a gear and a plurality of racks, the opening and closing drive mechanism is a rotary drive motor, the gear is arranged on the drive shaft of the rotary drive motor, the racks are arranged at intervals around the gear, and each rack is meshed with the gear, and the rack is connected to the movable part.

[0010] Optionally, a guide roller is provided between a side of the rack away from the gear and a mounting frame of the packaging bag clamping and stretching device, and the guide roller is in contact with a surface of the side of the rack away from the gear.

[0011] Optionally, the synchronous transmission mechanism includes a cam and multiple driving rods, the opening and closing driving mechanism is a rotary driving motor, the cam is arranged on the driving shaft of the rotary driving motor, the circumferential surface of the cam is the driving surface of the cam, the driving surface of the cam is formed by alternatingly connecting a plurality of convex surfaces and a plurality of concave surfaces, and each of the driving rods is evenly spaced around the circumference of the cam, one end of the driving rod is connected to the movable part, and the other end of the driving rod abuts against the driving surface of the cam.

[0012] Optionally, the synchronous transmission mechanism includes a driving block and an L-shaped transmission arm, the opening and closing driving mechanism is a linear driving device, and the packaging bag clamping and stretching device also includes a mounting frame, each of the movable parts can be reciprocatingly slidably arranged on the mounting frame, a plurality of L-shaped transmission arms can be rotatably arranged on the mounting frame and each of the L-shaped transmission arms is circumferentially spaced around the driving block, the driving block is arranged at the driving end of the linear driving device, the driving block is circumferentially spaced with a first driving groove, the top of the movable part is provided with a second driving groove, and the two ends of the L-shaped transmission arm are respectively provided with a first spherical part and a second spherical part, the first spherical part can be rotatably and slidably arranged in the first driving groove, and the second spherical part can be rotatably and slidably arranged in the second driving groove.

[0013] Optionally, the clamping drive mechanism is a piston cylinder, the piston cylinder of each clamping assembly is connected to a drive source via an electromagnetic valve, and the electromagnetic valve is connected to each piston cylinder via a multi-way pipe to drive each piston cylinder to move synchronously.

[0014] Optionally, the clamping jaw includes a movable jaw and a fixed jaw, the movable jaw is connected to the driving end of the clamping drive mechanism, and the fixed jaw is provided with a pressure detection device for detecting the clamping force between the movable jaw and the fixed jaw, and the pressure detection device is communicatively connected to the controller of the packaging bag clamping and stretching device.

[0015] Optionally, one of the movable claw and the fixed claw is provided with a packaging bag detection device for detecting whether there is a packaging bag between the movable claw and the fixed claw, and the packaging bag detection device is communicatively connected to a controller of the packaging bag clamping and stretching device.

[0016] Optionally, the packaging bag clamping and stretching device also includes a position detection device, which includes a detector and a trigger member, the trigger member is arranged on the movable part, and the detector is arranged on a mounting frame of the packaging bag clamping and stretching device, and the detector is communicatively connected with a controller of the packaging bag clamping and stretching device, and the controller of the packaging bag clamping and stretching device is used to control the opening and closing drive mechanism to stop moving when the detector detects the trigger member.

[0017] A packaging production line, comprising the packaging bag clamping and stretching device as described in any one of the above items.

[0018] To achieve the above-mentioned purpose, the utility model provides a packaging bag clamping and stretching device, which includes a synchronous opening and closing component and a clamping component, wherein the synchronous opening and closing component includes an opening and closing drive mechanism, a synchronous transmission mechanism and a plurality of movable parts, each movable part is connected to the driving end of the opening and closing drive mechanism through the synchronous transmission mechanism, and the opening and closing drive mechanism drives the movable parts to approach or move away from each other synchronously through the synchronous transmission mechanism. The number and orientation distribution of the movable parts are designed accordingly according to the shape and size of the packaging bag. There are multiple clamping components, and the clamping components include a clamping drive mechanism and a clamping claw. The clamping drive mechanism is arranged on the movable part. One or more clamping drive mechanisms can be arranged on one movable part. The driving end of the clamping drive mechanism is connected to the clamping claw to drive the clamping claw to clamp or open.

[0019] When in use, first adjust and set the initial position and the terminal position of each movable part according to the size and shape of the packaging bag, and then the opening and closing drive mechanism makes each movable part reach the initial position first through the synchronous transmission mechanism according to the set value, so that the packaging bag clamping and stretching device as a whole descends or rises to the packaging bag position. At this time, the bag corners and / or edges of the packaging bag enter the clamping jaws, and the clamping drive mechanism drives the clamping jaws to clamp the bag corners and / or edges of the packaging bag. The opening and closing drive mechanism drives each movable part to move to the terminal position to stretch the packaging bag and flatten the bag opening of the packaging bag. In this way, when performing subsequent sealing operations, the position of the bag opening of the packaging bag is determined and flat, which can avoid problems such as sealing wrinkles and unsatisfactory sealing position.

[0020] The utility model also provides a packaging production line, which includes the packaging bag clamping and stretching device as described above. Since the packaging bag clamping and stretching device has the above-mentioned technical effects, the packaging production line using the packaging bag clamping and stretching device should also have the above-mentioned technical effects, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of a packaging bag clamping and stretching device provided in one embodiment of the utility model;

[0023] Figure 2 A schematic diagram of the partial structure of a synchronous opening and closing component and a clamping component of a packaging bag clamping and stretching device provided by an embodiment of the utility model;

[0024] Figure 3 A partial front view of a synchronous opening and closing component and a clamping component of a packaging bag clamping and stretching device provided by an embodiment of the utility model;

[0025] Figure 4 A schematic structural diagram of a synchronous transmission mechanism of a packaging bag clamping and stretching device provided in another embodiment of the utility model;

[0026] Figure 5 A schematic structural diagram of a synchronous transmission mechanism of a packaging bag clamping and stretching device provided in yet another embodiment of the utility model;

[0027] Figure 6 A structural schematic diagram of a synchronous transmission mechanism of a packaging bag clamping and stretching device provided by another embodiment of the utility model in an open state;

[0028] Figure 7 This is a schematic structural diagram of a synchronous transmission mechanism of a packaging bag clamping and stretching device in a closed state provided by another embodiment of the utility model.

[0029] Figure 1-Figure 7 middle:

[0030] 1 is a mounting frame; 2 is a synchronous opening and closing assembly; 210 is an opening and closing driving mechanism; 220 is a gear rack mechanism; 221 is a gear; 222 is a rack; 220a is a cam-linkage mechanism; 221a is a cam; 222a is a driving rod; 220b is a wedge-shaped transmission mechanism; 221b is a wedge-shaped driving member; 222b is a wedge-shaped matching member; 220c is a swing arm driving mechanism; 221c is a driving block; 222c is an L-shaped transmission arm; 230 is a movable part; 240 is a guide roller; 3 is a clamping assembly; 310 is a clamping driving mechanism; 320 is a clamping claw; 321 is a fixed claw; 322 is a movable claw; 4 is a limiting guide mechanism; 410 is a guide rail slider; 420 is a limiting guide rail; 5 is a position detection device; 510 is a detector; 520 is a trigger. DETAILED DESCRIPTION

[0031] One of the cores of the utility model is to provide a packaging bag clamping and stretching device. The structural design of the packaging bag clamping and stretching device can stretch the packaging bag flat during the sealing operation to avoid problems such as sealing wrinkles and unsatisfactory sealing position.

[0032] Another core of the utility model is to provide a packaging production line based on the packaging bag clamping and stretching device.

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] See also Figures 1 to 3 , Figure 1 This is a schematic diagram of the structure of the packaging bag clamping and stretching device provided in an embodiment of the utility model. Figure 2 A schematic diagram of the partial structure of the synchronous opening and closing component and the clamping component of the packaging bag clamping and stretching device provided in an embodiment of the utility model, Figure 3 A partial front view of a synchronous opening and closing component and a clamping component of a packaging bag clamping and stretching device provided in an embodiment of the utility model.

[0035] The embodiment of the utility model provides a packaging bag clamping and stretching device, which is used for clamping and stretching the edge and / or bag opening of the packaging bag. The packaging bag clamping and stretching device comprises a synchronous opening and closing component 2 and a clamping component 3.

[0036] Among them, in order to facilitate the installation of the synchronous opening and closing component 2 and the clamping component 3, and to provide an installation position and support for the synchronous opening and closing component 2 and the clamping component 3, the packaging bag clamping and stretching device also includes a mounting frame 1, and the mounting frame 1 can adopt an integrated structure or a split structure to facilitate production and installation.

[0037] The synchronous opening and closing component 2 includes an opening and closing drive mechanism 210, a synchronous transmission mechanism and a plurality of movable parts 230. Each movable part 230 is connected to the driving end of the opening and closing drive mechanism 210 through the synchronous transmission mechanism. The opening and closing drive mechanism 210 drives each movable part 230 to approach or move away from each other synchronously through the synchronous transmission mechanism. The number and orientation distribution of the movable parts 230 are designed accordingly according to the shape and size of the packaging bag. The opening and closing drive mechanism 210 can output rotational motion or linear reciprocating motion according to the structural design of the synchronous transmission mechanism. The clamping component 3 is provided with a plurality of clamping components 3, including a clamping drive mechanism 310 and a clamping claw 320. The clamping drive mechanism 310 is arranged on the movable part 230. One or more clamping drive mechanisms 310 can be arranged on a movable part 230. The driving end of the clamping drive mechanism 310 is connected to the clamping claw 320 to drive the clamping claw 320 to clamp or open.

[0038] It can be seen that compared with the prior art, when the packaging bag clamping and stretching device provided by the embodiment of the utility model is used, the initial position and the terminal position of each movable part 230 are first adjusted and set according to the size and shape of the packaging bag, and then the opening and closing drive mechanism 210 makes each movable part 230 reach the initial position first through the synchronous transmission mechanism according to the set value, so that the packaging bag clamping and stretching device as a whole is lowered or raised to the packaging bag position. At this time, the bag corner and / or edge of the packaging bag enters the clamping jaw 320, and the clamping drive mechanism 310 drives the clamping jaw 320 to clamp the bag corner and / or edge of the packaging bag, and the opening and closing drive mechanism 210 drives each movable part 230 to move to the terminal position to stretch the packaging bag and flatten the bag mouth of the packaging bag. In this way, when performing subsequent sealing operations, the position of the bag mouth of the packaging bag is determined and flat, which can avoid problems such as sealing wrinkles and unsatisfactory sealing position.

[0039] The synchronous transmission mechanism is used to synchronously transmit the output power of an opening and closing drive mechanism 210 to each movable part 230. The synchronous transmission mechanism can be implemented in a variety of ways, such as a gear rack mechanism 220. In one embodiment of the present utility model, Figure 2 and Figure 3 As shown, the synchronous transmission mechanism includes a gear 221 and multiple racks 222. The opening and closing drive mechanism 210 is a rotary drive motor. The gear 221 is arranged on the drive shaft of the rotary drive motor. The racks 222 are arranged at intervals around the gear 221, and each rack 222 is meshed with the gear 221. The racks 222 are connected to the movable part 230.

[0040] Specifically, in the above embodiment, the synchronous transmission mechanism includes a gear 221 and two racks 222. The two racks 222 are symmetrically distributed about the axis center of the gear 221. When the rack 222 is engaged with the gear 221, one end of the rack 222 is also connected to a movable part 230. In this way, when the gear 221 rotates, the two racks 222 can be synchronously driven to move in opposite directions relative to each other, so as to drive the two movable parts 230 to move closer to or away from each other.

[0041] Furthermore, in order to ensure the stability of the rack 222 during its movement, in the above embodiment, Figure 2 and Figure 3 As shown, a guide roller 240 is arranged between the side of the rack 222 away from the gear 221 and the mounting frame 1 of the packaging bag clamping and stretching device, and the guide roller 240 is in contact with the surface of the side of the rack 222 away from the gear 221, so that during the movement of the rack 222, the guide roller 240 can provide guiding support for the rack 222 to prevent the rack 222 from tilting or shaking.

[0042] Of course, the guiding support for the rack 222 can also be achieved in other ways. For example, a guiding groove can be set on the mounting frame 1 of the packaging bag clamping and stretching device, and one or more sliders can be set on the side of the rack 222 away from the rack 222. The slider is slidably set in the guiding groove. In order to reduce friction, a roller can be set on the surface where the slider contacts the guiding groove.

[0043] In another embodiment, the synchronous transmission mechanism adopts a cam-link mechanism 220a, such as Figure 4 As shown, the synchronous transmission mechanism includes a cam 221a and a plurality of driving rods 222a, the opening and closing driving mechanism 210 is a rotary driving motor, the cam 221a is arranged on the driving shaft of the rotary driving motor, the circumferential surface of the cam 221a is the driving surface of the cam 221a, the driving surface of the cam 221a is formed by alternating a plurality of convex curved surfaces and a plurality of concave curved surfaces, each driving rod 222a is evenly spaced around the circumference of the cam 221a, one end of the driving rod 222a is connected to the movable part 230, and the other end of the driving rod 222a abuts against the driving surface of the cam 221a, when the cam 221a rotates, the convex curved surface and the concave curved surface of the circumferential surface of the cam 221a alternately contact with the end structure of the driving rod 222a, through the cam 221a designed according to the distribution position of each movable part 230, each driving rod 222a can be simultaneously contacted and matched with each convex curved surface or each concave curved surface of the cam 221a, thereby realizing that each movable part 230 approaches or moves away from each other.

[0044] It can be foreseen that if the end of the driving rod 222a only abuts against the driving surface of the cam 221a, in order to enable the movable part 230 to be reset, it is also necessary to set a reset member between the movable part 230 and the mounting frame 1, so that when the cam 221a drives the various movable parts 230 to move away from each other to the end position through the driving rod 222a, as the cam 221a continues to rotate, the reset member will push the movable part 230 to reset. Of course, the reset of the movable part 230 is not limited to this method. An inverted T-shaped or trapezoidal limiting groove can also be set on the driving surface of the cam 221a, and a limiting slider that is adapted to the shape of the above-mentioned inverted T-shaped or trapezoidal limiting groove is set at the end of the driving rod 222a that contacts the cam 221a. The cam 221a and the driving rod 222a are slidably matched through the limiting groove and the limiting slider, so that the cam 221a and the driving rod 222a always maintain a matching relationship.

[0045] It should be noted that, in order to reduce the friction between the cam 221a and the driving rod 222a, a roller may be provided at the end where the driving rod 222a contacts the cam 221a to form rolling friction between the cam 221a and the driving rod 222a and reduce friction resistance.

[0046] like Figure 5As shown, in another embodiment of the utility model, the synchronous transmission mechanism adopts a wedge transmission mechanism 220b, including a wedge-shaped driving member 221b and a wedge-shaped matching member 222b, and the opening and closing driving mechanism 210 is a linear driving device, wherein the wedge-shaped driving member 221b is provided with a plurality of wedge-shaped driving surfaces arranged along the circumference of the wedge-shaped driving member 221b, one end of the wedge-shaped matching member 222b is provided with a wedge-shaped matching surface, and the other end of the wedge-shaped matching member 222b is connected to the movable part 230, and the wedge-shaped driving member 221b and the wedge-shaped matching member 222b are matched with each other through the wedge-shaped driving surface and the wedge-shaped matching surface, so as to convert the up and down linear reciprocating movement of the wedge-shaped driving member 221b into the horizontal linear reciprocating movement of the wedge-shaped matching member 222b, thereby realizing the mutual approach or distance between the movable parts 230.

[0047] In the above embodiment, in order to ensure that the wedge-shaped driving surface and the wedge-shaped mating surface are always in contact and cooperation, a reset member can be provided between the movable portion 230 and the mounting frame 1, and the elastic force generated by the reset member can be utilized to ensure that the wedge-shaped driving surface and the wedge-shaped mating surface are always in contact and cooperation. Alternatively, an inverted T-shaped or trapezoidal limiting groove can be provided on one of the wedge-shaped driving surface and the wedge-shaped mating surface, and a limiting slider that matches the shape of the above-mentioned limiting groove can be provided on the other of the wedge-shaped driving surface and the wedge-shaped mating surface, so as to achieve the constant contact and cooperation between the wedge-shaped driving surface and the wedge-shaped mating surface.

[0048] In another embodiment of the present invention, Figure 6 and Figure 7 As shown, the synchronous transmission mechanism is a swing arm driving mechanism 222c, including a driving block 221c and an L-shaped transmission arm 222C, the opening and closing driving mechanism 210 is a linear driving device, and the packaging bag clamping and stretching device also includes a mounting frame 1, each movable part 230 can be reciprocatingly slidably arranged on the mounting frame 1, and a plurality of L-shaped transmission arms 222C can be rotatably arranged on the mounting frame 1 and each L-shaped transmission arm 222C is circumferentially spaced around the driving block 221c ( Figure 6 and Figure 7 Only one L-shaped transmission arm 222C is shown in the figure), the driving block 221c is arranged at the driving end of the linear driving device, the driving block 221c is provided with first driving grooves at circumferential intervals, the top of the movable part 230 is provided with a second driving groove, and the two ends of the L-shaped transmission arm 222C are respectively provided with a first spherical part and a second spherical part, the first spherical part is rotatably and slidably arranged in the first driving groove, and the second spherical part is rotatably and slidably arranged in the second driving groove.

[0049] When the movable parts 230 need to be separated from each other, such as Figure 6As shown, the opening and closing driving mechanism 210 drives the driving block 221c to descend, and the L-shaped transmission arm 222C rotates counterclockwise, the first spherical part rotates in the first driving groove and moves toward the notch of the first driving groove at the same time, and the second spherical part rotates in the second driving groove and moves toward the notch of the second driving groove at the same time, so as to push the movable part 230 away from the driving part, thereby realizing the mutual distance between the movable parts 230.

[0050] When the movable parts 230 need to be close to each other, such as Figure 7 As shown, the opening and closing driving mechanism 210 drives the driving block 221c to rise, and the L-shaped transmission arm 222C rotates clockwise, the first spherical part rotates in the first driving groove and moves toward the bottom of the first driving groove at the same time, and the second spherical part rotates in the second driving groove and moves toward the bottom of the second driving groove at the same time, so as to push the movable part 230 toward the driving part, thereby realizing the mutual approach of each movable part 230.

[0051] The above-mentioned linear drive device can be a piston cylinder, such as a pneumatic cylinder or a hydraulic cylinder, or a linear motor, or it can be composed of a rotary drive motor and a transmission mechanism, and the transmission mechanism is used to convert the rotational motion output by the rotary drive motor into linear reciprocating motion. The transmission mechanism includes but is not limited to a gear rack mechanism 220, a cam connecting rod mechanism 220a, a screw slider mechanism, etc.

[0052] Of course, it should be noted that the synchronous transmission mechanisms in the above-mentioned embodiments are only several preferred implementation schemes provided by the embodiments of the utility model, and are not actually limited to this. There are many other mechanisms that can realize the movable parts 230 approaching or moving away from each other, which are not listed one by one here.

[0053] In order to ensure that each clamping drive mechanism 310 clamps or releases synchronously, in an embodiment of the utility model, the clamping drive mechanism 310 is a piston cylinder, and the piston cylinder of each clamping assembly 3 is connected to the driving source through an electromagnetic valve, and the electromagnetic valve is connected to each piston cylinder through a multi-way pipe to drive each piston cylinder to move synchronously.

[0054] Specifically, Figure 1 and Figure 2 As shown, the clamping jaw 320 includes a movable jaw 322 and a fixed jaw 321. The movable jaw 322 is connected to the driving end of the clamping drive mechanism 310, and the fixed jaw 321 is arranged on the mounting frame 1. A pressure detection device for detecting the clamping force between the movable jaw 322 and the fixed jaw 321 is arranged on the fixed jaw 321. The pressure detection device is communicatively connected with the controller of the packaging bag clamping and stretching device to ensure that each clamping jaw 320 provides the same clamping force to avoid the bag mouth or edge of the packaging bag from detaching from the clamping jaw 320 during the process of stretching the packaging bag.

[0055] In order to increase the stability of the clamping jaw 320 in clamping the packaging bag, an elastic rubber pad can be set on the contact surface between the movable claw 322 and the fixed claw 321 of the clamping jaw 320, or a convex structure or a wavy structure can be set to achieve biting of the bag opening or edge of the packaging bag, so as to prevent the edge or bag opening of the packaging bag from detaching from the clamping jaw 320 during the process of stretching the packaging bag.

[0056] To further optimize the above technical solution, in an embodiment of the utility model, one of the movable claw 322 and the fixed claw 321 is provided with a packaging bag detection device for detecting whether there is a packaging bag between the movable claw 322 and the fixed claw 321. The packaging bag detection device is communicatively connected with the controller of the packaging bag clamping and stretching device. During the clamping process, if the packaging bag detection device does not detect the packaging bag, the controller outputs an alarm signal. The above packaging bag detection device includes but is not limited to infrared sensors, ultrasonic sensors, etc.

[0057] In order to ensure the stable movement of the movable part 230, as Figure 2 and Figure 3 As shown, a limited position guide mechanism 4 is provided between the movable part 230 and the mounting frame 1, and the limited position guide mechanism 4 includes a limited position guide rail 420 and a guide rail slider 410, wherein the limited position guide rail 420 is provided on the mounting frame 1, and the movable part 230 is provided with a guide rail slider 410, and the guide rail slider 410 and the limited position guide rail 420 are slidably matched. Figure 2 and Figure 3 In the illustrated embodiment, limit rails 420 are arranged in parallel on both sides of the mounting frame 1 , guide rail sliders 410 are arranged on both sides of the two movable parts 230 , and the movable parts 230 are slidably matched with the two limit rails 420 through the two guide rail sliders 410 .

[0058] like Figure 2 and Figure 3 As shown, in an embodiment of the utility model, the packaging bag clamping and stretching device also includes a position detection device 5, the position detection device 5 includes a detector 510 and a trigger member 520, the trigger member 520 is arranged on the movable part 230, the detector 510 is arranged on the mounting frame 1 of the packaging bag clamping and stretching device, the detector 510 is communicatively connected with the controller of the packaging bag clamping and stretching device, the controller of the packaging bag clamping and stretching device is used to control the opening and closing drive mechanism 210 to stop the action when the detector 510 detects the trigger member 520. Specifically, two of the above-mentioned detectors 510 should be set, one of which is used to detect the initial position of each movable part 230 approaching each other, and the other is used to detect the terminal position of each movable part 230 moving away from each other. Since each movable part 230 moves synchronously, it is only necessary to set the position detection device 5 between one of the movable parts 230 and the mounting frame 1.

[0059] Based on the above-mentioned packaging bag clamping and stretching device, an embodiment of the utility model also provides a packaging production line, which includes the packaging bag clamping and stretching device as described in the above-mentioned embodiment. Since the packaging production line adopts the packaging bag clamping and stretching device in the above-mentioned embodiment, please refer to the above-mentioned embodiment for the technical effect of the packaging production line.

[0060] In the above packaging production line, the packaging bag clamping and stretching device is integrally mounted on a displaceable mechanism, such as a robotic arm, and the displaceable mechanism is used to drive the packaging bag clamping and stretching device to move closer to or away from the packaging bag to be sealed.

[0061] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0062] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A packaging bag clamping and stretching device, characterized in that: include: A synchronous opening and closing assembly, the synchronous opening and closing assembly comprising an opening and closing drive mechanism, a synchronous transmission mechanism and a plurality of movable parts, each of the movable parts being transmission-connected to a driving end of the opening and closing drive mechanism through the synchronous transmission mechanism, and the opening and closing drive mechanism driving each of the movable parts to synchronously approach or move away from each other through the synchronous transmission mechanism; A plurality of clamping assemblies, wherein the clamping assemblies include a clamping drive mechanism and a clamping claw. The clamping drive mechanism is arranged on the movable part, and the driving end of the clamping drive mechanism is transmission-connected with the clamping claw to drive the clamping claw to clamp or open.

2. The packaging bag clamping and stretching device according to claim 1, characterized in that: The synchronous transmission mechanism includes a gear and a plurality of racks. The opening and closing drive mechanism is a rotary drive motor. The gear is arranged on the drive shaft of the rotary drive motor. The racks are arranged at intervals around the gear and mesh with the gear. The racks are connected to the movable part.

3. The packaging bag clamping and stretching device according to claim 2, characterized in that: A guide roller is arranged between a side of the rack away from the gear and a mounting frame of the packaging bag clamping and stretching device, and the guide roller is in contact with a surface of the side of the rack away from the gear.

4. The packaging bag clamping and stretching device according to claim 1, characterized in that: The synchronous transmission mechanism includes a cam and multiple driving rods. The opening and closing driving mechanism is a rotary driving motor. The cam is arranged on the driving shaft of the rotary driving motor. The circumferential surface of the cam is the driving surface of the cam. The driving surface of the cam is formed by alternating multiple convex surfaces and multiple concave surfaces. The driving rods are evenly spaced around the circumference of the cam. One end of the driving rod is connected to the movable part, and the other end of the driving rod abuts against the driving surface of the cam.

5. The packaging bag clamping and stretching device according to claim 1, characterized in that: The synchronous transmission mechanism includes a driving block and an L-shaped transmission arm, the opening and closing driving mechanism is a linear driving device, and the packaging bag clamping and stretching device also includes a mounting frame, each of the movable parts can be reciprocatingly slidably arranged on the mounting frame, a plurality of L-shaped transmission arms can be rotatably arranged on the mounting frame and each of the L-shaped transmission arms is circumferentially spaced around the driving block, the driving block is arranged at the driving end of the linear driving device, the driving block is circumferentially spaced with a first driving groove, the top of the movable part is provided with a second driving groove, and the two ends of the L-shaped transmission arm are respectively provided with a first spherical part and a second spherical part, the first spherical part can be rotatably and slidably arranged in the first driving groove, and the second spherical part can be rotatably and slidably arranged in the second driving groove.

6. The packaging bag clamping and stretching device according to any one of claims 1 to 5, characterized in that: The clamping drive mechanism is a piston cylinder. The piston cylinder of each clamping assembly is connected to a drive source via an electromagnetic valve. The electromagnetic valve is connected to each piston cylinder via a multi-way pipe to drive each piston cylinder to move synchronously.

7. The packaging bag clamping and stretching device according to any one of claims 1 to 5, characterized in that: The clamping jaw includes a movable jaw and a fixed jaw, the movable jaw is connected to the driving end of the clamping drive mechanism, and the fixed jaw is provided with a pressure detection device for detecting the clamping force between the movable jaw and the fixed jaw, and the pressure detection device is communicatively connected to the controller of the packaging bag clamping and stretching device.

8. The packaging bag clamping and stretching device according to claim 7, characterized in that: One of the movable claw and the fixed claw is provided with a packaging bag detection device for detecting whether there is a packaging bag between the movable claw and the fixed claw, and the packaging bag detection device is communicatively connected with a controller of the packaging bag clamping and stretching device.

9. The packaging bag clamping and stretching device according to claim 1, characterized in that: The packaging bag clamping and stretching device also includes a position detection device, which includes a detector and a trigger member. The trigger member is arranged on the movable part, and the detector is arranged on a mounting frame of the packaging bag clamping and stretching device. The detector is communicatively connected with a controller of the packaging bag clamping and stretching device. The controller of the packaging bag clamping and stretching device is used to control the opening and closing drive mechanism to stop moving when the detector detects the trigger member.

10. A packaging production line, characterized in that: The packaging production line comprises the packaging bag clamping and stretching device as described in any one of claims 1-9.

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