Support mechanism for the mouth of packaging bag

Abstract

The purpose of the present invention is to provide a supporting mechanism for the mouth of a packaging bag that can keep the mouth of the packaging bag in a vertical state. Two clamps are arranged on the frame below the material receiving port. A belt-shaped constraint area is formed between the two clamps and the mouth of the packaging bag is placed in the belt-shaped constraint area. The belt-shaped constraint area extends downstream and connects to the bag receiving end of the clamping and conveying mechanism. Blowing nozzles are arranged along the length direction of the two clamps. The blowing direction of the blowing nozzles is arranged upward. The blowing nozzles blow toward the mouth of the packaging bag above the two clamps to keep the mouth of the packaging bag in an upright state. In the above scheme, the bag body of the packaging bag is clamped between the two clamps, and the blowing nozzle blows toward the mouth of the bag above the clamps, so that the mouth of the bag above the clamps remains in an upright state, so that it can smoothly enter the downstream clamping and conveying mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of packaging machinery, and in particular to a supporting mechanism for a bag opening of a packaging bag. Background Art

[0002] After the packaging bag has completed the material loading or filling process at the loading position, it needs to be transferred to the downstream clamping mechanism. The clamping mechanism clamps the bag mouth and transfers the bag to the subsequent sewing mechanism, and the subsequent sewing process completes the sealing, labeling and other operations. In the process of transferring from the loading position to the clamping mechanism, the bag mouth needs to be kept in a vertical state at all times, so as to ensure that the bag mouth clamped by the clamping mechanism is in a vertical state. However, due to the soft nature of the packaging bag, the bag mouth of the packaging bag is naturally soft and collapsed. How to ensure that the bag mouth of the packaging bag is always in a vertical state during this process is a difficult problem that the industry needs to solve urgently. Summary of the invention

[0003] The object of the present invention is to provide a supporting mechanism for a bag opening of a packaging bag which can keep the bag opening of the packaging bag in a vertical state.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a supporting mechanism for the bag mouth of a packaging bag, two clamps are arranged on the frame below the material receiving port, a belt-shaped constraint area is formed between the two clamps and the bag mouth of the packaging bag is placed in the belt-shaped constraint area, the belt-shaped constraint area extends downstream and connects to the bag receiving end of the clamping and conveying mechanism, and blowing nozzles are arranged on the two clamps along their length directions, and the blowing direction of the blowing nozzles is arranged upwards, and the blowing nozzles blow toward the bag mouth of the packaging bag above the two clamps to keep the bag mouth of the packaging bag upright.

[0005] In the above scheme, the packaging bag body is clamped between two clamping plates, and the air blowing nozzle blows air toward the bag opening above the clamping plates, so that the bag opening above the clamping plates remains upright, thereby smoothly entering the downstream clamping and conveying mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 This is a schematic diagram of the overall structure of the support organization;

[0007] Figure 2 This is a bottom view of the supporting mechanism. DETAILED DESCRIPTION

[0008] like Figure 1-Figure 2As shown, a supporting mechanism for the bag mouth of a packaging bag is provided on a frame 10 below the material receiving port. A belt-shaped constraint area is formed between the two plywoods 21 and the bag mouth of the packaging bag is placed in the belt-shaped constraint area. The belt-shaped constraint area extends downstream and connects to the bag receiving end of the clamping and conveying mechanism. Blowing nozzles a are provided on the two plywoods 21 along their length direction. The blowing direction of the blowing nozzles a is arranged upward. The blowing nozzles a blow toward the bag mouth of the packaging bag above the two plywoods 21 to keep the bag mouth of the packaging bag upright. The bag body of the packaging bag is clamped between the two plywoods 21. The spacing between the two plywoods 21 is greater than the thickness of the packaging bag. That is to say, the packaging bag is free between the two plywoods 21. Due to the soft collapse characteristics of the packaging bag, the bag mouth has a tendency to collapse. Therefore, blowing nozzles a are provided on the two plywoods 21. The blowing nozzles a blow toward the bag mouth above the plywoods 21 so that the bag mouth above the plywoods 21 remains upright, thereby smoothly entering the downstream clamping and conveying mechanism.

[0009] Preferably, an air distribution pipe 22 is provided on the upper end surface of the clamping plate 21, the length direction of the air distribution pipe 22 is consistent with the length direction of the strip-shaped constraint area, holes are evenly spaced along the length direction of the air distribution pipe 22 to form a blowing nozzle a, and an air inlet joint 23 is provided on the air distribution pipe 22. The gas enters the air distribution pipe 22 from the air inlet joint 23, is evenly distributed in the air distribution pipe 22, and is ejected from the blowing nozzles a evenly spaced thereon, so that the bag mouth is evenly stressed in the width direction and always maintains an upright state.

[0010] Furthermore, the direction of the air curtain sprayed from the blowing nozzle a is obliquely upward, and the air curtains on both sides intersect at the edge of the bag mouth and the intersection line is coplanar with the center line of the strip-shaped constraint area. The gas sprayed from a row of blowing nozzles a forms an air curtain, which blows obliquely from bottom to top toward the bag mouth. Even if the bag mouth partially collapses, it will be blown up by the air curtain. The air curtains on both sides intersect at the center line of the strip-shaped constraint area, ensuring that the gas impact on both sides of the bag mouth is equal, and then the bag mouth can be kept upright and located at the center line of the strip-shaped constraint area, so that the bag mouth can smoothly enter the downstream clamping and conveying mechanism, thereby improving production efficiency.

[0011] In order to meet the needs of packaging bags of different specifications, a suspension arm 11 is cantilevered downward from the frame 10, a connecting plate 24 is connected to the outer side of the clamping plate 21, a connecting shaft 241 is provided on the connecting plate 24, and the connecting shaft 241 is inserted into the sleeve 12 provided at the lower end of the suspension arm 11 to form a rotational fit. The upper end of the connecting rod 13 is hinged to the frame 10, and the lower end is rotated with the short shaft 242 fixed on the connecting plate 24 through a fisheye bearing. Through the setting of the connecting rod 13, the clamping plate 21 always remains in a flat state, thereby ensuring that the direction of the air curtain sprayed from the blowing nozzle a is obliquely upward, and the axis core of the short shaft 242 is arranged parallel to the rod length direction of the connecting shaft 241.

[0012] When the packaging bag is clamped by the bag clamping mechanism, the two clamping plates 21 need to be in a position to avoid the packaging bag. A rotating shaft 31 is fixed on the upper end of the suspension arm 11. The axis direction of the rotating shaft 31 is consistent with the length direction of the air distribution pipe 22. The cylinder body of the cylinder 32 is hinged to the frame 10, and the piston rod is hinged to the connecting arm 33 fixed on the rotating shaft 31 through a fisheye bearing. The axis core of the hinge shaft is consistent with the axis core of the rotating shaft 31. The cylinder 32 drives the rotating shaft 31 to rotate and drive the clamping plates 21 to move away from each other to the avoidance position to avoid the packaging bag. After the loading is completed, the cylinder 32 drives the rotating shaft 31 to rotate and drive the clamping plates 21 to move away from each other to the supporting position. At this time, the clamping plates 21 clamp the bag body below the bag opening, and the blowing nozzle a blows air to the bag opening.

[0013] Specifically, the connecting arm 33 is in a herringbone shape as a whole, wherein two suspension ends are respectively hinged to the piston rod of the cylinder 32 and a rotating shaft 31, and the other suspension end is hinged to one end of the connecting rod 34, and the other end of the connecting rod 34 is hinged to another rotating shaft 31, and the axis core of each hinge axis is consistent with the axis core of the rotating shaft 31. In this way, only one cylinder 32 is required to realize the swinging action of the two hanging arms 11, and the cost is low.

[0014] The inner side surfaces of the two clamping plates 21 are corrugated surfaces. The corrugated surfaces have a large friction force, which can effectively prevent the bag body of the packaging bag from sliding and improve the stability of clamping the bag body.

[0015] The rotating shaft 31, the cylinder 32 and the connecting arm 33 are all arranged on the mounting plate 41. The lower plate surface of the mounting plate 41 is fixed with a slider 42. The slider 42 forms a sliding fit with a guide rail 43 fixed on the frame 10. The length direction of the guide rail 43 is consistent with the length direction of the clamping plate 21. The whole set of mechanisms can move along the guide rail 43, so the clamping plate 21 is set very long, which is conducive to space layout.

Claims

1. A supporting mechanism for a packaging bag opening, characterized in that: Two clamping plates (21) are arranged on the frame (10) below the material receiving port, a strip-shaped constraint area is formed between the two clamping plates (21) and the bag mouth of the packaging bag is placed in the strip-shaped constraint area, the strip-shaped constraint area extends downstream and is connected to the bag receiving end of the clamping and conveying mechanism, and blowing nozzles (a) are arranged along the length direction of the two clamping plates (21), and the blowing direction of the blowing nozzles (a) is arranged upward, and the blowing nozzles (a) blow toward the bag mouth of the packaging bag above the two clamping plates (21) so that the bag mouth of the packaging bag remains in an upright state, and the direction of the air curtain sprayed by the blowing nozzles (a) is obliquely upward, and the air curtains on both sides intersect at the bag mouth near the edge of the bag mouth, and the intersection line is coplanar with the center line of the strip-shaped constraint area; An air distribution pipe (22) is provided on the upper end surface of the clamping plate (21), the length direction of the air distribution pipe (22) is consistent with the length direction of the strip-shaped restraining area, holes are evenly spaced along the length direction of the air distribution pipe (22) to form an air blowing nozzle (a), and an air inlet joint (23) is provided on the air distribution pipe (22).

2. The supporting mechanism for the bag opening of the packaging bag according to claim 1, characterized in that: A suspension arm (11) is cantilevered downwardly from the frame (10); a connecting plate (24) is connected to the outer side of the clamping plate (21); a connecting shaft (241) is provided on the connecting plate (24); the connecting shaft (241) is inserted into a sleeve (12) provided at the lower end of the suspension arm (11) to form a rotational fit; the upper end of the connecting rod (13) is hinged to the frame (10); the lower end is rotationally fitted with a short shaft (242) fixed on the connecting plate (24) through a fisheye bearing; the shaft core of the short shaft (242) is arranged parallel to the shaft core of the connecting shaft (241).

3. The supporting mechanism for the bag opening of the packaging bag according to claim 2, characterized in that: A rotating shaft (31) is fixed to the upper end of the boom (11), the axis direction of the rotating shaft (31) is consistent with the length direction of the air distribution pipe (22), the cylinder body of the cylinder (32) is hinged to the frame (10), the piston rod is hinged to the connecting arm (33) fixed to the rotating shaft (31) through a fisheye bearing, and the axis core of the hinge shaft is consistent with the axis core of the rotating shaft (31).

4. The supporting mechanism for the bag opening of the packaging bag according to claim 3, characterized in that: The connecting arm (33) is in a herringbone shape as a whole, wherein two suspension ends are respectively hinged to the piston rod of the cylinder (32) and a rotating shaft (31), and the other suspension end is hinged to one end of the connecting rod (34), and the other end of the connecting rod (34) is hinged to another rotating shaft (31), and the axis core of each hinge axis is consistent with the axis core of the rotating shaft (31).

5. The supporting mechanism for the bag opening of the packaging bag according to claim 1, characterized in that: The inner plate surfaces of the two clamping plates (21) are corrugated surfaces.

6. The supporting mechanism for the bag opening of the packaging bag according to claim 1, characterized in that: The rotating shaft (31), the cylinder (32) and the connecting arm (33) are all arranged on the mounting plate (41). A slider (42) is fixed to the lower plate surface of the mounting plate (41). The slider (42) and the guide rail (43) fixed on the frame (10) form a sliding fit. The length direction of the guide rail (43) is consistent with the length direction of the clamping plate (21).

Images