Following type bag opening mechanism of packaging machine

Abstract

The utility model discloses a packing machine following type bag opening mechanism which comprises an installation seat and a lifting plate, a vertical air cylinder a is installed on the upper side of the installation seat, the lifting plate is located under the installation seat, a piston rod of the air cylinder a drives the lifting plate to move, a horizontal cross beam is fixedly installed on the side face of the lifting plate, and two L-shaped swing arms are installed on the side face of the cross beam in a hinged mode. The cross beam is of a long-strip-plate-shaped structure, an L-shaped transmission arm is hinged to the side face of the cross beam, a pin column a is fixedly installed at the front end of the transmission arm, a clamping groove is formed in the inner end of the swing arm, and the clamping groove is connected with the pin column a; a long-strip-shaped hole is formed in the rear end of the transmission arm, an air cylinder b is installed on the side face of the cross beam, and a pin column b is installed on a piston rod in the front of the air cylinder b and connected with the long-strip-shaped hole in a sliding mode. The mechanism is simple in structure, convenient to manufacture and debug and low in failure rate.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging machinery, in particular to a follow-up bag opening mechanism for a packaging machine. Background Art

[0002] Current bag-feeding packaging machines typically open the bag mouth only after the bag reaches the loading position, allowing for further loading. This results in a long pause during loading. Follow-up bag opening mechanisms, however, open the bag while it's moving along the conveyor line, even before the bag reaches the filling position. Debugging the bag-opening mechanism of existing horizontal bag-feeding packaging machines is complex (for example, see Chinese Invention Patent Publication No. CN113428442A). Debugging requires finding the appropriate cam and rocker, then adjusting the rocker's chute length to adjust the bag opening size. Furthermore, the complex structure can lead to a high failure rate. Utility Model Content

[0003] The purpose of the present utility model is to provide a follow-up bag opening mechanism for a packaging machine to solve the problems raised in the above background technology.

[0004] The lifting plate is located just below the mounting base, and the piston rod of cylinder a drives the lifting plate to move. The lifting plate is located just below the mounting base, and the piston rod of cylinder a drives the lifting plate to move. The side of the lifting plate is fixedly mounted with a horizontal crossbeam, and the side of the crossbeam is hingedly mounted with two L-shaped swing arms, the two swing arms are arranged opposite to each other and have a circular hole at one end of the outer side. The swing arm is fixedly mounted with a vertically extending cross bar on the side at the corner, and the front end side of the cross bar is fixedly connected with a shift fork. The two shift forks are V-shaped. The cross beam is a long plate-shaped structure and is hingedly connected to the L-shaped transmission arm at the side. The front end of the transmission arm is fixedly mounted with a pin a, and the inner end of the swing arm is provided with a slot, which is connected to the pin a. The rear end of the transmission arm is provided with a long hole, and a cylinder b is mounted on the side of the cross beam. The front piston rod of the cylinder b is equipped with a pin b, and the pin b is slidably connected to the long hole.

[0005] Preferably, the lifting plate is rectangular and has vertical guide rods fixedly connected to the upper sides of both ends. The guide rods pass through the mounting seat and are slidably connected thereto.

[0006] Preferably, a notch is provided on the upper side of the crossbeam, and the notch is located below the pin a.

[0007] Compared with the existing technology, the present invention has the following advantages: the bag opening mechanism uses cylinder B to push the transmission arm to flip, and the transmission arm cooperates with the tension spring to control the flipping of the swing arm, thereby enabling the two shift forks to achieve the opening and closing action. The two shift forks are inserted from top to bottom into the bag opening and then opened to open the bag. The mechanism has a simple structure, is easy to manufacture and debug, and has a low failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0009] Figure 2 This is a schematic diagram of the installation structure of the utility model.

[0010] In the figure: 1. Mounting base; 2. Cylinder a; 3. Lifting plate; 4. Crossbeam; 5. Cylinder b; 6. Transmission arm; 7. Long hole; 8. Swing arm; 9. Crossbar; 10. Shift fork. DETAILED DESCRIPTION

[0011] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0012] See also Figure 1-2 The utility model provides a technical solution: a follow-up bag opening mechanism for a packaging machine, comprising a mounting seat 1 and a lifting plate 3. A vertical cylinder a2 is installed on the upper side of the mounting seat 1. The lifting plate 3 is located directly below the mounting seat 1. The piston rod of the cylinder a2 drives the lifting plate 3 to move. The lifting plate 3 is rectangular and is fixedly connected to vertical guide rods on both ends of the upper side. The guide rods pass through the mounting seat 1 and are slidably connected thereto. A horizontal crossbeam 4 is fixedly installed on the side of the lifting plate 3. Two L-shaped swing arms 8 are hingedly installed on the side of the crossbeam 4. The two swing arms 8 are arranged opposite to each other and have a circular hole at one end of the outer side. The circular hole is used to connect a tension spring to reset the swing arm 8. A vertically extending cross bar 9 is fixedly installed on the side of the swing arm 8 at the corner. A shift fork 10 is fixedly connected to the front end side of the cross bar 9. The two shift forks 10 are V-shaped.

[0013] The crossbeam 4 is a long plate-like structure and is hinged to an L-shaped transmission arm 6 on the side. A pin a is fixedly installed at the front end of the transmission arm 6. A slot is provided at the inner end of the swing arm 8, which is connected to the pin a. A notch is provided on the upper side of the crossbeam 4, which is located below the pin a. A long hole 7 is provided at the rear end of the transmission arm 6. A cylinder b5 is installed on the side of the crossbeam 4. A pin b is installed on the front piston rod of the cylinder b5. The pin b is slidably connected to the long hole 7. The cylinder b5 pushes the transmission arm 6 to flip. The transmission arm 6 drives the two swing arms 8 to flip synchronously. The opening of the lower ends of the two forks 10 changes accordingly. When the two forks 10 are inserted into the packaging bag, the forks 10 flip outward to open the bag. When this mechanism is used, Figure 2 As shown, the linear module of the packaging machine ( Figure 2 The packaging machine is installed in a) and driven by a linear module to achieve horizontal follow-up movement. The packaging machine is equipped with a suction cup mechanism on both sides of the bag delivery ( Figure 2 b) is used to open the packaging bag.

[0014] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A follow-up bag opening mechanism for a packaging machine, comprising a mounting seat (1) and a lifting plate (3), wherein a vertical cylinder a (2) is mounted on the upper side of the mounting seat (1), and the lifting plate (3) is located directly below the mounting seat (1), and the piston rod of the cylinder a (2) drives the lifting plate (3) to move, characterized in that: A horizontal crossbeam (4) is fixedly installed on the side of the lifting plate (3), and two L-shaped swing arms (8) are hingedly installed on the side of the crossbeam (4). The two swing arms (8) are arranged opposite to each other and have a round hole at one end of the outer side. A vertically extending cross bar (9) is fixedly installed on the side of the swing arm (8) at the corner. A shift fork (10) is fixedly connected to the front side of the cross bar (9). The two shift forks (10) are V-shaped. The crossbeam (4) is a long plate-like structure and an L-shaped transmission arm (6) is hinged on the side. A pin a is fixedly installed on the front end of the transmission arm (6). A card slot is provided at the inner end of the swing arm (8), and the card slot is connected to the pin a. A long hole (7) is provided at the rear end of the transmission arm (6). A cylinder b (5) is installed on the side of the crossbeam (4). The front piston rod of the cylinder b (5) is installed with a pin b, and the pin b is slidably connected to the long hole (7).

2. The follow-up bag opening mechanism of the packaging machine according to claim 1, characterized in that: The lifting plate (3) is rectangular and has vertical guide rods fixedly connected to the upper sides of both ends. The guide rods pass through the mounting seat (1) and are slidably connected thereto.

3. The follow-up bag opening mechanism of the packaging machine according to claim 1, characterized in that: A notch is provided on the upper side of the crossbeam (4), and the notch is located below the pin a.

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