A drawstring bag opening mechanism for a stringing machine

Abstract

The application discloses a handbag opening mechanism for a stringing machine, and has the technical scheme as follows: the technical scheme points of the handbag opening mechanism include a sucking disc assembly, a driving assembly and a compensation assembly; the sucking disc assembly is connected with the driving assembly and symmetrically arranged on both sides of a rack; the compensation assembly is arranged above the sucking disc assembly which sucks a bag surface to be folded, and is used for moving the sucking disc assembly downward when the driving assembly moves and expands the bag surface, so that the upper section of the folded bag surface is moved downward, the compensation of the height of the bag surface during punching is realized, the height difference between the hole positions on the bag surfaces on both sides is reduced, the chuck on the hand string can be aligned with the hole positions on the bag surfaces on both sides when the device strings, the smooth stringing is ensured, and the quality of the stringing is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of handbag stringing equipment, in particular to a handbag opening mechanism for a stringing machine. BACKGROUND

[0002] Gift bags and handbags are usually punched or buckled at the bag opening part to facilitate hand carrying and improve the firmness of hand carrying, so that the hand carrying string can be inserted into the bag body during the stringing process. For example, the buckle device of a stringing machine disclosed in patent No. (CN217073563U) or the punching mechanism disclosed in patent No. (CN216032773U), wherein in order to make the equipment more convenient to buckle or punch the two side bag surfaces, an opening mechanism is provided to unfold the bag opening, and the two side bag surfaces are pulled to the two sides by the suction cup and telescopic cylinder to achieve opening.

[0003] When the equipment processes such paper bags as shown in Figure 1 , the paper bag is first folded to look like Figure 2 , that is, the bag bottom is folded to one side, and the two side bag surfaces are folded bag surface 2 and reference bag surface 3 respectively. When the suction cup assembly 6 moves horizontally to the two sides by the same distance to pull the bag surface to the two sides, the reference bag surface 3 swings outward with point D as the center, and the folded bag surface 2 swings outward with point C as the center.

[0004] In this process, when the reference bag surface 3 swings outward, the suction cup assembly 6 will generate an upward pulling force on the reference bag surface 3, but since the center D is fixed by the clamping assembly, the reference bag surface 2 cannot be pulled upward, and at this time the reference bag surface 3 will generate a downward reaction force on the suction cup assembly 6, so that the suction position between the suction cup and the reference bag surface 3 will be relatively high, and under the condition that the punching position cannot be changed, the hole position A left on the reference bag surface 3 will be higher than the original punching position;

[0005] And point D is not fixed, at the same time, the pulling force of the folded bag surface 2 to the suction cup assembly 6 is less than the adsorption force of the suction cup assembly to the folded bag surface 2, so when the folded bag surface 2 is pulled upward by the suction cup assembly 6, the folding part between the folded bag surface 3 and the bag bottom of the folded bag surface 2 will be deformed due to the upward pulling force of the suction cup assembly 6, so that the position of point C will be pulled upward and become higher, which compensates for the height change of the original adsorption position on the folded bag surface, so that the adsorption position of the suction cup assembly 6 on the folded bag surface 2 remains unchanged or the change distance is less than the movement distance of the reference bag surface 3 and the suction cup adsorption position; Finally, the hole B height on the folded bag surface 2 will be lower than the hole A height on the reference bag surface 3 when the equipment punches holes on the bag surface, so that the hole positions on the two sides of the bag surface have a height difference, which causes the heights of the handle ropes on the two sides to be inconsistent after the paper bag is threaded, resulting in an unbalanced pressure on the hand during use and affecting the user's use; At the same time, it also causes the hole position height on the two sides of the bag surface to be inconsistent after unfolding due to the fact that the bag bottom is not clamped, which affects the success rate of threading the handle rope. SUMMARY

[0006] In order to solve the above problems, the present application provides a handbag opening mechanism for a threading machine, which can compensate for the height of the folded bag surface when the bag opening of the handbag is unfolded, thereby reducing the height difference between the hole positions on the two sides of the bag surface when the holes are punched or buckled.

[0007] To achieve the above object, the technical scheme adopted by the present application is as follows: a handbag opening mechanism for a threading machine, comprising a rack 5, characterized in that it comprises two groups of suction cup assemblies 6 symmetrically arranged on both sides of the rack 5:

[0008] The two groups of suction cup assemblies 6 respectively adsorb the folded bag surface 2 and the reference bag surface 3 of the paper bag;

[0009] A driving assembly 7 is connected with the two groups of suction cup assemblies 6, used to control the relative movement of the two groups of suction cup assemblies 6 in the horizontal direction, so as to unfold the two sides of the bag surface;

[0010] A compensation assembly 8 is arranged on the suction cup assembly 6 on one side of the folded bag surface 2, used to move the upper segment of the folded bag surface 2 downward when the suction cup assembly 6 unfolds the bag surface.

[0011] The present application further provides that the compensation assembly 8 comprises:

[0012] A connecting frame 81 is fixedly arranged on the driving assembly 7, and the suction cup assembly 6 is hingedly connected to the connecting frame 81 and can swing up and down.

[0013] The application is further provided with an elastic member 83 between the connecting frame 81 and the suction disc assembly 6, which is used to make the suction disc assembly 6 elastically reset after swinging downward.

[0014] The application is further provided with the compensation assembly 8, which comprises:

[0015] The sliding rail 12 is arranged between the suction disc assembly 6 and the driving assembly 7, which makes the suction disc assembly 6 elastically reset after sliding downward when the suction disc assembly 6 drives the two side bag surfaces to unfold.

[0016] The application is further provided with the suction disc assembly 6, which comprises:

[0017] The mounting rod 61 is hingedly arranged with the connecting frame 81, and a plurality of suction disc assemblies 62 are arranged on the mounting rod 61.

[0018] The application is further provided with a limiting member 9 between the connecting frame 81 and the suction disc assembly 6, which is used to limit the swinging stroke of the suction disc assembly 6.

[0019] The application is further provided with the limiting member 9, which comprises a first limiting block 91 arranged on the mounting rod 61 and a second limiting block 92 arranged on the connecting frame 81, and the first limiting block 91 and the second limiting block 92 abut against each other after the suction disc assembly 6 elastically resets.

[0020] The application is further provided with the driving assembly 7, which is two groups of air cylinders, and the output ends of the air cylinders are arranged in connection with the suction disc assembly 6.

[0021] The application is further provided with the suction disc assembly 62, which is a pneumatic suction disc connected with an external air source.

[0022] The application has the following beneficial effects:

[0023] Compared with the prior art, the application makes the suction disc assembly movably connected with the driving assembly through the compensation assembly, and when the bag surface of the handbag is unfolded outwardly by the suction disc, the downward pulling force of the folded bag surface on the suction disc is greater than the elastic force of the elastic member between the suction disc assembly and the driving assembly, so that the suction disc assembly is pulled downwardly and moved, thereby driving the upper segment of the folded bag surface to move downwardly, and when the device punches holes or buckles on the bag surface, the relative height of the hole B on the folded bag surface is increased, the height difference between the hole and the hole on the reference bag surface is reduced, the holes between the two side bag surfaces can be aligned, the clamping head of the handbag rope can be aligned with the hole and smoothly passes through when the device is threaded, the success rate of the handbag threading is improved, and the quality of the paper bag after threading is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structural schematic diagram of a handbag.

[0025] Figure 2 is Figure 1 is a data analysis diagram when the handbag is opened.

[0026] Figure 3 is a perspective structural diagram of embodiment 1.

[0027] Figure 4 is a connection schematic diagram of the connecting frame and the suction cup assembly of embodiment 1.

[0028] Figure 5 is a structural schematic diagram of embodiment 2.

[0029] Figure 6 is a cooperation schematic diagram of embodiment 1 and the upper buckle mechanism.

[0030] Figure 7 is a cooperation schematic diagram of embodiment 1 and the punching mechanism.

[0031] Reference signs: 2-folded bag surface; 3-reference bag surface; 5-machine frame; 6-suction cup assembly; 61-mounting rod; 62-suction cup; 7-driving assembly; 71-cylinder A; 72-cylinder B; 8-compensation assembly; 81-connecting frame; 82-rotating shaft; 83-elastic member; 9-limiting member; 91-first limiting block; 92-second limiting block; 12-sliding rail; 13-elastic member. DETAILED DESCRIPTION

[0032] The application will be further described in detail below in combination with the drawings.

[0033] Embodiment 1:

[0034] As shown in Figures 1-4 , Figure 6 , Figure 7 , the embodiment discloses a handbag opening mechanism for a stringing machine, which comprises cylinders A 71 and cylinders B 72 arranged on both sides of a machine frame 5, the output end of the cylinder A 71 is fixedly connected with a mounting rod 61, three suction cup assemblies 62 are arranged on the mounting rod 61, and the three suction cup assemblies 62 are used for adsorbing a reference bag surface 3 as shown in Figure 2 The output end of the cylinder B 72 is fixedly connected with a connecting frame 81, the connecting frame 81 is provided with a rotating shaft 82 with an elastic member 83, the mounting rod 61 is rotationally connected with the connecting frame 81 through the rotating shaft 82, so that the suction cup assembly 62 can swing up and down, as shown in Figure 4 The device clamps the reference bag surface 3 as shown in Figure 1When the paper bag reaches below the punching station or the buckle mechanism, cylinders A71 and B72 are activated, and their outputs drive the suction cup assembly 62 to move towards the center of the paper bag, allowing the suction cup assembly 62 to adhere to both sides of the bag. Then, the two cylinders retract. At this time, cylinder A71, being fixedly connected to the suction cup assembly 6, normally drives the reference bag surface 3 to rotate and unfold along the center D. Simultaneously, because the center D is held by the clamping assembly, the bag opening height of the reference bag surface 3 decreases as it unfolds outwards. Due to the mutual force between the reference bag surface 3 and the suction cup assembly 6, the reference bag surface 3 remains taut, and as the suction cup assembly 6 moves horizontally, its adsorption position on the reference bag surface gradually moves closer to the bag opening. Cylinder B72 and the suction cup assembly 6 are elastically hinged, so while driving the folded bag surface 2 to move and unfold, the paper bag's... The folded bag surface 2 exerts a counterforce on the suction cup assembly 6, causing the suction cup assembly 6 to swing downwards. This causes the upper section of the folded bag surface 2 to bend downwards. As the upper section of the folded bag surface 2 bends downwards, the height of the upper part of the bag surface decreases. This compensates for the problem of deformation and upward movement of the bag bottom and the folded part of the folded bag surface due to insufficient bag surface length during the pulling process. Therefore, the height of the hole B left on the folded bag surface 2 will be higher than the original height. After the two bag surfaces come close together to close the bag opening, the height difference between the holes on the two sides of the bag surface can be reduced. This allows the device to align with the holes when threading the rope, reducing the error between the handle rope and the clip, ensuring smooth rope threading, and improving the success rate of threading the rope on the bag. At the same time, it can also avoid the discomfort caused by the different height of the handle rope after threading due to the difference in the height of the holes on the two sides of the bag surface, which would result in different pressure on the user's palm when holding the handle rope.

[0035] like Figure 4 As shown, the suction cup assembly 62 is mounted on the mounting rod 61. A first limiting block 91 is provided between the mounting rod 61 and the connecting frame 81. The first limiting block 91 is fixedly connected to the mounting rod 61 and hinged to the connecting frame 81. A second limiting block 92 extends from the connecting frame 81 towards the limiting block 91 and abuts against the first limiting block 91. The second limiting block 92 and the first limiting block 91 can limit the upward swing stroke of the mounting rod 61, thereby ensuring that the suction surface of the suction cup assembly 62 remains parallel to the bag surface before the mounting rod 61 is suctioned by the elastic member 83.

[0036] In the above structure, the elastic element 83 can be a coil spring, which is set on the rotating shaft 82 to ensure the elastic swing between the connecting frame 81 and the mounting rod 61; at the same time, the elastic element 83 can also be a tension spring or a compression spring set between the connecting frame 81 and the mounting rod 61, and the elastic swing of the mounting rod 61 can be realized through the tension spring and the compression spring.

[0037] Example 2:

[0038] The connection structure between the cylinder and the suction cup assembly is the same as in Embodiment 1, with the only difference being the compensation component 8.

[0039] like Figure 5 As shown, the suction cup assembly 6 located on one side of the folded bag surface 2 is slidably connected to the cylinder 72 via a slide rail 12, allowing the suction cup assembly 6 to slide up and down. When the cylinder 72 drives the folded bag surface 2 to unfold outward via the suction cup assembly 6, the suction cup assembly 2 will drive the folded bag surface 2 to slide downward together due to the downward pulling force of the folded bag surface 2 on the suction cup assembly 6, thereby reducing the height of the upper section of the folded bag surface 2. This prevents the center C from rising due to deformation of the folded part during the unfolding process, thus reducing the height difference between the holes on both sides of the bag surface after punching. The elastic element 13 can reset and raise the suction cup assembly 6.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of the present invention should be included within the protection scope of the present invention.

Claims

1. A bag opening mechanism for a drawstring machine, comprising a frame (5), characterized in that, Including those symmetrically arranged on both sides of the frame (5): Two sets of suction cup components (6) adsorb the folded bag surface (2) and the reference bag surface (3) of the paper bag respectively; The drive component (7) is used to control the relative movement of the two sets of suction cup components (6) in the horizontal direction to realize the unfolding of the bag surface on both sides; A compensation component (8) is provided on the suction cup assembly (6) located on one side of the folded bag surface (2), which moves downward under the action of the folded bag surface (2) when it drives the folded bag surface (2) to unfold.

2. The bag opening mechanism for a rope threading machine according to claim 1, characterized in that, The compensation component (8) includes: The connecting frame (81) is fixedly mounted on the drive assembly (7), and the suction cup assembly (6) is hinged to the connecting frame (81) and can swing up and down.

3. The bag opening mechanism for a drawstring machine according to claim 2, characterized in that, An elastic element (83) is provided between the connecting frame (81) and the suction cup assembly (6), and the elastic element (83) is used to allow the suction cup assembly (6) to swing downward and elastically return to its original position.

4. The bag opening mechanism for a rope threading machine according to claim 1, characterized in that, The compensation component (8) includes: The slide rail (12) is located between the suction cup assembly (6) and the drive assembly (7). When the suction cup assembly (6) drives the two sides of the bag to unfold, the slide rail (12) causes the suction cup assembly (6) adsorbing the folded bag surface (2) to slide downward. An elastic element (13) is also provided between the suction cup assembly (6) and the drive assembly (7) to make the suction cup assembly (6) elastically reset.

5. A bag opening mechanism for a drawstring machine according to claim 3, characterized in that, The suction cup assembly (6) includes: The mounting rod (61) is hinged to the connecting frame (81), and a plurality of suction cups (62) are provided on the mounting rod (61).

6. A bag opening mechanism for a drawstring machine according to claim 5, characterized in that, A limiting member (9) is provided between the connecting frame (81) and the suction cup assembly (6), and the limiting member (9) is used to limit the swing stroke of the suction cup assembly (6).

7. A bag opening mechanism for a rope threading machine according to claim 6, characterized in that, The limiting component (9) includes a first limiting block (91) disposed on the mounting rod (61) and a second limiting block (92) disposed on the connecting frame (81). When the suction cup assembly (6) is elastically reset, the first limiting block (91) and the second limiting block (92) abut against each other.

8. A bag opening mechanism for a drawstring machine according to any one of claims 1-6, characterized in that, The drive assembly (7) consists of two sets of cylinders, and the output end of the cylinders is connected to the suction cup assembly (6).

9. A bag opening mechanism for a rope threading machine according to claim 5, characterized in that, The suction cup (62) is a pneumatic suction cup connected to an external air source.

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