Automatic bag opening mechanism

Abstract

An automatic bag opening mechanism comprises a rack (10), a workbench and suction cup linkage mechanisms arranged on the two sides of the workbench, each suction cup linkage mechanism comprises two oppositely-arranged negative pressure suction cups (20) and a first power device (30), and further comprises two oppositely-arranged pressing block mechanism sets used for clamping a bag. And the linkage mechanism (50) is used for connecting the negative pressure sucking disc (20) and the pressing block mechanism group. The suction cups are arranged in a staggered mode, the problem that the suction force needed for bag opening is large is solved, the bevel edge linkage plate structure is adopted, the problems that debugging is difficult and the structure is complex are solved, and the design that the pressing blocks with the openings in the two sides are additionally arranged is adopted, so that the technical problem that bags are prone to being separated from the suction cups is solved.

Description

Technical Field

[0001] The utility model relates to the field of packaging, in particular to the structural design of a packaging bag opening mechanism during the bag filling process. Background Art

[0002] In current automatic bag opening equipment, suction cups are generally used to absorb the two sides of the bag, and then the suction cups are manipulated to achieve the bag opening function. The existing bag opening mechanism has the following problems, such as: the bag is not fixed when the bag mouth is facing upward, and if the bag is heavy, the bag will fall off the suction cup; during the suction cup pressure opening process, the inner wall of the bag is also in a negative pressure state, and a large suction force is required to open the bag; and most of the current bag opening equipment uses a connecting rod to drive the bag suction and bag pressing mechanisms to move simultaneously. This mechanism is difficult to debug, and the debugging effects of batch production are also very different. Summary of the invention

[0003] The utility model adopts the design of adding clamping devices on both sides of the bag and adopting a wedge block linkage mechanism to solve the technical problems in the prior art such as the bag is easy to separate from the suction cup during transfer, large suction force is required to open the bag, and the structure is complex and difficult to debug.

[0004] The automatic bag opening mechanism designed by the utility model to solve the above-mentioned technical problems includes a frame, a workbench arranged in the middle of the frame and a suction cup linkage mechanism arranged on both sides of the workbench, the suction cup linkage mechanism includes two negative pressure suction cups arranged opposite to each other and a first power device for controlling the movement of the two negative pressure suction cups, and also includes two groups of pressing block mechanism groups arranged opposite to each other for clamping the bag, and further includes a linkage mechanism connecting the negative pressure suction cup and the pressing block mechanism group, each of the pressing block mechanism groups includes two pressing block mechanisms straddling both sides of the negative pressure suction cup, each pressing block mechanism includes a pressing block and a second power device for driving the movement thereof, and also includes a guide rail arranged on the frame and a guide rail seat matched therewith, the pressing block and the second power device are arranged on the guide rail seat, and the pressing block mechanism group also includes a pressing block fastening piece for fastening the pressing blocks of the two pressing block mechanisms arranged opposite to each other in the two groups of pressing block mechanism groups.

[0005] The linkage mechanism includes a linkage plate fixedly connected to the negative pressure suction cup and a tension spring connecting two pressure block mechanisms, wherein at least one side of the linkage plate is a bevel, and the guide rail seat on the side corresponding to the bevel contacts the bevel of the linkage plate through a contact component. Alternatively, both sides of the linkage plate are bevels, and the guide rail seats in the pressure block mechanisms on both sides contact the two bevels of the linkage plate through contact components, and the contact components are rolling bearings.

[0006] The suction cup centers of the two oppositely arranged negative pressure suction cups are eccentrically staggered, and the first power device is a guide cylinder.

[0007] The utility model adopts the method of staggered setting of suction cups to solve the problem that greater suction force is needed to open the bag, adopts the structure of beveled edge linkage plates to solve the problems of difficult debugging and complex structure, and adopts the design of adding opening pressure blocks on both sides to solve the technical problem that the bag is easy to fall off the suction cup. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a three-dimensional schematic diagram of the automatic bag opening mechanism of the utility model. DETAILED DESCRIPTION

[0009] Combined with Figure 1 The specific embodiments of the present utility model are described.

[0010] Depend on Figure 1 It can be seen that the automatic bag opening mechanism of the utility model includes a frame 10, a workbench arranged in the middle of the frame and a suction cup linkage mechanism arranged on both sides of the workbench, the suction cup linkage mechanism includes two negative pressure suction cups 20 arranged opposite to each other and a first power device 30 for controlling the movement of the above two negative pressure suction cups, and also includes two groups of pressing block mechanism groups arranged opposite to each other for clamping the bag, and further includes a linkage mechanism 50 connecting the negative pressure suction cup 20 and the pressing block mechanism group, each of the pressing block mechanism groups includes two pressing block mechanisms 40 spanning both sides of the negative pressure suction cup 20, each pressing block mechanism 40 includes a pressing block 41 and a second power device 42 driving the movement thereof, and also includes a guide rail 43 arranged on the frame 10 and a guide rail seat 44 matched therewith, and the pressing block 41 and the second power device 42 are arranged on the guide rail seat 44. In the utility model, when the bag 100 is delivered to the workbench by the bag delivery mechanism, the negative pressure suction cups 20 arranged oppositely move toward the bag and suck the two sides of the bag. At the same time, the pressing block mechanisms in the two groups of pressing block mechanism groups arranged oppositely move toward each other, thereby clamping the two sides of the bag opening, thereby ensuring that the bag is fixed and will not separate from the suction cups. The linkage mechanism mainly controls the linkage between the pressing block and the suction cup. When the suction cup retreats to both sides (opening the bag), the pressing block mechanisms on both sides move toward the suction cup to leave room for the bag opening to avoid tearing the packaging bag during the process of opening the bag opening. The pressing block mechanism group also includes a pressing block fastener 45 on the pressing blocks 41 of the two pressing block mechanisms 40 arranged oppositely in the two groups of pressing block mechanism groups. The pressing block fastener fastens the two pressing blocks arranged oppositely into one, so that the two can move synchronously, avoiding the occurrence of bag tearing caused by asynchronous movement.

[0011] Depend on Figure 1It can be seen that another invention focus of the utility model is the structural design of the linkage mechanism, the linkage mechanism 50 includes a linkage plate 51 fixedly connected to the negative pressure suction cup 20 and a tension spring 52 connecting two pressing block mechanisms 40, the linkage plate 51 has at least one side as a bevel, and the guide rail seat 44 on the side corresponding to the bevel is in contact with the bevel of the linkage plate 51 through the contact component 46. Or both sides of the linkage plate 51 are bevels, and the guide rail seats 44 in the pressing block mechanisms 40 on both sides are in contact with the two bevels of the linkage plate 51 through the contact component 46, and the contact component 46 is a rolling bearing. The movement rhythm of the negative pressure suction cup and the pressure block requires precise coordination. For this reason, the utility model is designed with an inclined plate control mechanism. When the suction cup retreats to both sides (opening the bag), the tension spring 52 pulls the guide seats 44 on both sides toward the middle (the direction of the suction cup). Due to the limitation of the bevel, its movement process is highly coordinated with the action of the suction cup. The slope of the bevel is designed according to the degree of opening of the packaging bag, thereby ensuring that the requirements of bag opening and closing and other actions are met.

[0012] Depend on Figure 1 It can be seen that in order to solve the problem of excessive negative pressure during bag opening, the centers of the two oppositely arranged negative pressure suction cups 20 are eccentrically offset, so as to avoid the problem that the two suction cups are arranged opposite to each other and cause difficulty in opening the bag, as well as excessive negative pressure in the bag. The first power device 30 is a guide cylinder, which not only solves the power drive problem, but also ensures the accuracy of the suction cup movement trajectory.

[0013] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An automatic bag opening mechanism, comprising a frame (10), a workbench arranged in the middle of the frame and a suction cup linkage mechanism arranged on both sides of the workbench, characterized in that: The suction cup linkage mechanism comprises two negative pressure suction cups (20) arranged opposite to each other and a first power device (30) for controlling the movement of the two negative pressure suction cups, and also comprises two groups of pressing block mechanism groups arranged opposite to each other for clamping the bag, and further comprises a linkage mechanism (50) connecting the negative pressure suction cups (20) and the pressing block mechanism group, each of the pressing block mechanism groups comprises two pressing block mechanisms (40) arranged on both sides of the negative pressure suction cup (20), each pressing block mechanism (40) comprises a pressing block (41) and a second power device (42) for driving the movement thereof, and also comprises a guide rail (43) arranged on the frame (10) and a guide rail seat (44) matched therewith, and the pressing block (41) and the second power device (42) are arranged on the guide rail seat (44).

2. The automatic bag opening mechanism according to claim 1, characterized in that: The pressing block mechanism group also includes a pressing block locking piece (45) for locking together pressing blocks (41) of two pressing block mechanisms (40) disposed opposite to each other in the two pressing block mechanism groups.

3. The automatic bag opening mechanism according to claim 1 or 2, characterized in that: The linkage mechanism (50) comprises a linkage plate (51) fixedly connected to the negative pressure suction cup (20) and a tension spring (52) connecting the two pressure block mechanisms (40); at least one side of the linkage plate (51) is a bevel, and the guide rail seat (44) on the side corresponding to the bevel contacts the bevel of the linkage plate (51) via a contact component (46).

4. The automatic bag opening mechanism according to claim 3, characterized in that: Both sides of the linkage plate (51) are beveled edges, and the guide rail seats (44) in the block pressing mechanisms (40) on both sides are in contact with the two beveled edges of the linkage plate (51) through contact components (46).

5. The automatic bag opening mechanism according to claim 3, characterized in that: The contact component (46) is a rolling bearing.

6. The automatic bag opening mechanism according to claim 1 or 2, characterized in that: The suction cup centers of the two negative pressure suction cups (20) arranged opposite to each other are arranged in a non-concentric and staggered manner.

7. The automatic bag opening mechanism according to claim 1 or 2, characterized in that: The first power device (30) is a guide cylinder.

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