A conveying belt device capable of unfolding the vacuum packaging bag

Abstract

The application discloses a conveying belt device capable of unfolding the buckle hand of a vacuum packaging bag, which comprises a conveying belt frame, the conveying belt frame is connected with a conveying line, shaft rollers are arranged at the front and back of the conveying belt frame respectively, a conveying belt is arranged around the front and back shaft rollers, the shaft rollers drive the conveying belt to move around the front and back shaft rollers and convey the vacuum packaging body on the conveying belt, retractable lifting arms are arranged on the two sides of the conveying belt frame respectively, a vacuum packaging body moving position sensor is arranged on the conveying belt frame, when the sensor detects that the vacuum packaging body is arranged between the two lifting arms during the conveying process of the vacuum packaging body along with the conveying belt, the lifting arms are extended to lift the vacuum packaging body and then are retracted to lower the vacuum packaging body, during the lifting and lowering process, the buckle hand at the lower end surface of the vacuum packaging body which is still in contact with the conveying belt is unfolded and taken out to the front end of the vacuum packaging body by the rubbing of the conveying belt.

Description

Technical Field

[0001] This invention relates to a conveyor belt device that allows the handle of a vacuum-packed bag to be opened by hand. Background Technology

[0002] In the vacuum packaging of granular materials (such as rice and soybeans) in bags with buckles, one end of the buckle is at the bottom during the filling process. During filling, the bag-stacking mechanism impacts the bottom end to quickly get the material into the bag. After sealing, the bag falls down and the buckle is pressed under the vacuum packaging bag and conveyed forward. Because the buckle pressed under the vacuum packaging bag has natural forward elasticity, if the buckle is not straightened in time, it will spring open and get stuck in the gap between the conveyors when it is conveyed between two sections of the conveyor, preventing it from continuing to be conveyed forward. At the same time, if the buckle is not straightened, it will also cause the height of the two ends of the bag stack to be inconsistent when entering the boxing or wrapping stage, making it impossible to box or wrap.

[0003] Therefore, how to improve the existing vacuum packaging conveyor system where the handles are folded down and pressed down by the packaging, and how to address the issues that prevent the bags from being conveyed and successfully packed due to gaps between the conveyor belts and inconsistent heights at both ends of the bag stack caused by the folded-down handles, are problems we need to solve. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a conveyor belt device that can untangle the handle of a vacuum packaging bag. The vacuum packaging bag is lifted horizontally and the moving conveyor belt flips and untangles the handle folded under the packaging until it is in front, thus preventing the handle from getting stuck in the gap at the connection of the conveyor equipment.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] A conveyor belt device for unscrewing the handle of a vacuum packaging bag includes a conveyor belt frame connected to a conveyor line. Rollers are positioned at the front and rear of the conveyor belt frame, and a conveyor belt surrounds the rollers. The rollers drive the conveyor belt to move around the rollers, conveying vacuum packaging bags placed on the conveyor belt. The handle of the vacuum packaging bag is folded and pressed against the lower end of the bag. The conveyor belt frame has telescopic lifting arms on both sides of the conveyor belt. A vacuum packaging bag movement position sensor is installed on the conveyor belt frame. During the conveyor belt's movement, when the sensor detects that the bag is positioned between the two lifting arms, the lifting arms extend to lift the bag and then retract. During this lifting and lowering process, while the folded handle of the bag is still in contact with the conveyor belt, the moving conveyor belt straightens the handle and brings it to the front end of the bag.

[0007] A further embodiment of the solution is as follows: the lifting arm includes a telescopic cylinder fixedly mounted on the conveyor belt frame. The front end of the telescopic arm of the telescopic cylinder is connected to a guardrail plate, and the lower end of the guardrail plate is connected to an extended support plate. The lower end face of the support plate is close to the surface of the conveyor belt. The thickness of the support plate is at least 20mm, and the extension length of the support plate is at least 30mm. The upper end face of the support plate is a slope that slopes downward from the inside to the outside. The lifting arm extends and inserts the slope of the support plate from the lower end face of the vacuum packaging bag to lift the vacuum packaging bag.

[0008] A further aspect of the solution is that the length of the guardrail is greater than or equal to the length of the vacuum packaging bag, and the vacuum packaging bag movement position sensor is located at the exit point where the vacuum packaging bag moves out of the two guardrails.

[0009] A further aspect of the solution is that the angle between the downward-sloping surface of the upper end face of the pallet and the surface of the transmission belt is 118 to 140 degrees.

[0010] A further aspect of the solution is that the included angle is 130 degrees.

[0011] A further provision of the solution is that the time interval between the extension of the lifting arm to lift the vacuum packaging bag and then its retraction is at least the time it takes for the conveyor belt to move a distance equal to the length of the buckle, or at least the time it takes for the conveyor belt to move a distance equal to 1.5 times the length of the buckle.

[0012] A further aspect of the solution is that the distance between the surface of the transmission belt and the surface of the transmission belt is 1mm to 2mm.

[0013] A further aspect of the solution is that inverted triangular spikes are provided at intervals in the transverse middle section of the transmission belt. These inverted triangular spikes are used to increase the friction on the surface of the transmission belt and hook onto the handle that is folded and pressed against the lower end of the vacuum packaging bag.

[0014] The beneficial effects of this invention are: simple structure, only adding lifting arms on both sides of the conveyor belt to lift the vacuum packaging bag horizontally, and using the moving conveyor belt to rub and flip the buckles pressed under the packaging until they are in front, avoiding the buckles from getting stuck in the gaps at the equipment connection, and at the same time, it will not cause the phenomenon of inconsistent height between the front and back when packing and stacking. Attached Figure Description

[0015] Figure 1 This is an isometric view of the structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the end side of the structure of the present invention;

[0017] Figure 3 This is an isometric view of the invention in use.

[0018] Figure 4 This is a schematic diagram of the end-side usage state of the present invention;

[0019] Figure 5 This is a diagram showing the gap between the latch and the conveyor belt, indicating that the latch has not been properly opened. Detailed Implementation

[0020] like Figure 5 As shown, if the handle 101 of the vacuum packaging bag 1 with the handle is not straightened in time, the handle will pop open and get stuck in the gap between the conveyors when it is transported between the two conveyors, making it impossible to continue to transport forward.

[0021] Therefore, a conveyor belt device that allows the handle of a vacuum-packed bag to be untied, such as... Figures 1 to 4 As shown, it includes a conveyor belt rack 2, a conveyor belt rack and a transmission line (such as...). Figure 5 (As shown) Connected, rollers 201 and 202 are respectively arranged at the front and rear of the conveyor belt frame 2. One of the rollers 201 and 202 is a motor-driven active roller. A conveyor belt 3 is arranged around the front and rear rollers 201 and 202. The rollers 201 and 202 drive the conveyor belt to move around the front and rear rollers 201 and 202, conveying vacuum packaging bags 1 placed on the conveyor belt 3. The vacuum packaging bag handle 101 is folded and pressed against the lower end face of the vacuum packaging bag. The conveyor belt frame 2 is provided with telescopic lifting arms 4 on both sides of the conveyor belt 3. Vacuum packaging bag moving arm is provided on the conveyor belt frame 2. The position sensor 5 is a photoelectric through-beam sensor. During the movement and transmission of the vacuum packaging bag 1 along the conveyor belt, when the position sensor detects that the vacuum packaging bag is positioned between the two lifting arms, the lifting arms extend to lift the vacuum packaging bag and then retract. During the lifting and lowering, the handle folded on the lower end of the vacuum packaging bag will naturally droop and remain attached to the conveyor belt 3. That is, when the handle 101 folded on the lower end of the vacuum packaging bag droops and is still in contact with the conveyor belt 3, the handle in contact with the conveyor belt will be straightened by the moving conveyor belt and brought out to the front end of the vacuum packaging bag.

[0022] In the embodiment: the lifting arm can have several structural forms. One is that it is held by two horizontal cylinders and then lifted by a vertical cylinder. This structure is relatively complex.

[0023] This embodiment uses a different structure, such as Figure 1As shown, the lifting arm includes a telescopic cylinder 6 fixedly mounted on the conveyor belt frame 2. The telescopic cylinder is fixed to the conveyor belt frame 2 by a Z-shaped bracket 7. The front end of the telescopic arm of the telescopic cylinder 6 is connected to a guardrail plate 8. The lower end of the guardrail plate 8 is connected to an extended support plate 9. The lower end surface of the support plate 9 is close to the surface of the conveyor belt 3, which is 1mm to 2mm away from the surface of the conveyor belt 3. The thickness of the support plate 9 is at least 20mm, and the extended length of the support plate is at least 30mm. The length of the guardrail plate 8 is greater than or equal to the length of the vacuum packaging bag 1. Therefore, in order to stabilize the guardrail plate 8, guide posts 11 are respectively provided on both sides of the telescopic cylinder 6 via guide sleeves 10 on the Z-shaped bracket 7. The guide posts 11 slide back and forth in the guide sleeves 10. The front end of the guide posts 11 is connected and fixed to the guardrail plate 8. The upper end surface of the support plate 9 is a slope 901 that slopes downward from the inside to the outside. The lifting arm extends and inserts the slope of the support plate 9 from the lower end surface of the vacuum packaging bag 1 to lift the vacuum packaging bag 1. The optimal thickness of pallet 9 is 20mm, and the optimal length of the extended pallet is 30mm. At this point, the height H of the vacuum packaging bag being lifted is 10mm.

[0024] In this embodiment: the vacuum packaging bag movement position sensor 5 is installed at the exit where the vacuum packaging bag 1 moves out of the two guardrail plates 8.

[0025] Wherein: the angle α between the inclined surface 901 of the upper surface of the pallet, which slopes downward from the inside to the outside, and the surface of the transmission belt is 118 degrees to 140 degrees, with the optimal angle being 130 degrees.

[0026] To ensure that the handle is stably straightened (opened) and pulled out, the interval between the extension of the lifting arm to lift the vacuum packaging bag and then retracting it is at least the time it takes for the conveyor belt to move the handle a distance, or at least the time it takes for the conveyor belt to move the handle a distance of 1.5 times its length.

[0027] Furthermore, in order to ensure that the buckle is stably unhooked and pulled out, inverted triangular spikes 301 are provided at intervals in the transverse middle section of the transmission belt 3. The inverted triangular spikes 301 are used to increase the friction of the transmission belt surface and hook the buckle 101 that is folded and pressed against the lower end of the vacuum packaging bag.

[0028] The aforementioned conveyor belt device that can untangle the handles of vacuum packaging bags has a simple structure. It only adds lifting arms on both sides of the conveyor belt to lift the vacuum packaging bags horizontally. The moving conveyor belt then rubs and flips the handles folded under the packaging until they are in front, preventing the handles from getting stuck in the gaps at the equipment connection. At the same time, it does not cause inconsistent heights between the front and back when packing and stacking boxes.

Claims

1. A conveyor belt device for opening the handle of a vacuum packaging bag, comprising a conveyor belt frame connected to a conveyor line, rollers arranged at the front and rear of the conveyor belt frame, a conveyor belt surrounding the front and rear rollers, the rollers driving the conveyor belt to move around the front and rear rollers to convey vacuum packaging bags placed on the conveyor belt, the handle of the vacuum packaging bag being folded and pressed against the lower end face of the vacuum packaging bag, characterized in that, The conveyor belt frame is equipped with telescopic lifting arms on both sides of the conveyor belt. A vacuum packaging bag movement position sensor is installed on the conveyor belt frame. During the process of the vacuum packaging bag moving and being transported with the conveyor belt, when the vacuum packaging bag movement position sensor detects that the vacuum packaging bag is placed between the two lifting arms, the lifting arms extend to lift the vacuum packaging bag and then retract and lower it. During the lifting and lowering, when the buckle at the lower end of the vacuum packaging bag is folded down and still in contact with the conveyor belt, the moving conveyor belt straightens the buckle and brings it to the front end of the vacuum packaging bag. The lifting arm includes a telescopic cylinder fixedly mounted on the conveyor belt frame. The front end of the telescopic arm of the telescopic cylinder is connected to a guardrail plate, and the lower end of the guardrail plate is connected to an extended support plate. The lower end face of the support plate is close to the surface of the conveyor belt. The thickness of the support plate is at least 20 mm, and the extension length of the support plate is at least 30 mm. The upper end face of the support plate is a downward sloping surface from the inside to the outside. The lifting arm extends and inserts the sloping surface of the support plate into the lower end face of the vacuum packaging bag to lift the vacuum packaging bag. The time interval between the extension of the lifting arm to lift the vacuum packaging bag and its retraction is at least the time it takes for the conveyor belt to move the handle a distance equal to or at least 1.5 times the length of the conveyor belt to move the handle. Inverted triangular barbs are provided at intervals in the transverse middle section of the conveyor belt. The inverted triangular barbs are used to increase the friction of the conveyor belt surface and hook the handle that is folded and pressed against the lower end of the vacuum packaging bag.

2. The conveyor belt device for opening vacuum packaging bags by hand according to claim 1, characterized in that, The length of the guardrail is greater than or equal to the length of the vacuum packaging bag, and the vacuum packaging bag movement position sensor is set at the exit where the vacuum packaging bag moves out of the two guardrails.

3. The conveyor belt device for opening vacuum packaging bags by hand according to claim 1, characterized in that, The angle between the downward-sloping upper surface of the pallet and the surface of the transmission belt is 118 to 140 degrees.

4. The conveyor belt device for opening vacuum packaging bags by hand according to claim 3, characterized in that, The included angle is 130 degrees.

5. The conveyor belt device for opening vacuum packaging bags by hand according to claim 1, characterized in that, The distance from the surface of the transmission belt is 1mm to 2mm.

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