Blueberry weighing and packaging equipment with turnover type feeding structure and method

Abstract

The invention relates to the technical field of fruit packaging, in particular to blueberry weighing and packaging equipment with an overturning type feeding structure and a blueberry weighing and packaging method. A covering unit with covers stacked inside is arranged above the output end of the belt conveyor, a gap is reserved between every two adjacent covers, a lifting unit used for bearing packaging boxes and driving the packaging boxes to ascend and descend in the vertical direction is arranged below the covering unit, and the covering unit comprises two separation frames which move face to face or back to back in the horizontal direction. A separating plate is hinged to the separating frame, the end, facing the covers, of the separating plate is a separating end, and the separating frame can drive the separating plate to slide into a gap between the adjacent covers before the packaging box ascends and makes contact with the covers. The covering efficiency is improved, it is guaranteed that the cover can be smoothly clamped with the packaging box, and it is also guaranteed that the cover on the lowermost layer can be smoothly separated from the cover stacked in the covering unit after the packaging box is clamped.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fruit packaging, in particular to a blueberry weighing and packaging device with a turnover feeding structure and a method thereof. BACKGROUND

[0002] The weighing and packaging of boxed blueberries are generally completed by manual work, which is very labor-intensive and inefficient. Therefore, blueberry weighing and packaging devices have appeared on the market to automatically weigh and package boxed blueberries. The existing blueberry weighing and packaging device includes a feeding mechanism and a weighing mechanism. The feeding mechanism is located above the weighing mechanism and is used to feed the weighing mechanism. In the existing blueberry weighing and packaging device, the feeding mechanism and the weighing mechanism are designed to be relatively compact. The feeding mechanism is fixedly installed on the device rack, while the weighing mechanism needs to be frequently overhauled. When the weighing mechanism needs to be overhauled, the feeding mechanism needs to be manually disassembled, and then the weighing mechanism can be overhauled. This results in inconvenient on-site maintenance, complicated operation, and poor timeliness.

[0003] Chinese Patent No. CN115892552B discloses a turnover feeding mechanism of a blueberry weighing and packaging machine. The blueberry weighing and packaging machine includes a feeding mechanism and a weighing mechanism installed on a rack. The feeding mechanism is located above the weighing mechanism. The feeding rack of the feeding mechanism is rotatably installed on the rack through a rotating shaft extending in the left-right direction. The rotating shaft is rotatably installed on the rack and located behind the weighing mechanism. The rear end of the feeding rack is rotatably supported through a pushing shaft extending in the left-right direction. The pushing shaft is fixedly connected with the rotating shaft through a connecting piece. The rack is also provided with a driving mechanism. The driving mechanism drives the pushing shaft to swing back and forth around the axis of the rotating shaft, and the pushing shaft drives the feeding rack to turn back and forth around the rotating shaft.

[0004] Although the above-mentioned scheme facilitates the overhaul of the weighing mechanism and the feeding mechanism, the existing blueberries are packaged in boxes. However, according to the packaging method in the above-mentioned scheme, although the blueberries can be placed in the packaging box when weighing, the upper part of the packaging box still needs to be covered with a lid. A separate station needs to be set up for covering the lid. The covering unit is set up on the station. After weighing is completed, the covering unit for covering the lid needs to be repositioned when performing the covering operation. The working efficiency is low. If the existing covering unit is directly set up on the upper part of the weighing mechanism, the weighing mechanism needs to support the packaging box. When the covering unit covers the lid on the packaging box each time, the weighing mechanism will be squeezed, which reduces the service life of the weighing mechanism and affects the weighing accuracy of the weighing mechanism.

[0005] If the weighing mechanism and the cover unit are combined, the traditional cover unit needs to drive the cover to descend when covering the cover on the packaging box, and a plurality of covers are stacked in the cover unit, the adjacent covers are clamped with each other, the cover unit not only needs to strip the lowermost cover, but also needs to drive the lowermost cover to descend and cover on the packaging box, so that the structure of the packaging equipment is complex and large in size, and since the belt conveyor for conveying blueberries is arranged on one side of the cover unit, the related structure of the cover unit close to the belt conveyor also needs to avoid the output end of the belt conveyor to ensure that the belt conveyor can normally convey the blueberries into the packaging box. SUMMARY

[0006] In view of the above problems, the blueberry weighing and packaging equipment with the turnover feeding structure and the method are provided, the lifting unit is arranged to support the packaging box, the packaging box is lifted by the lifting unit when the weight of the blueberries reaches the rated weight, and the cover unit is directly arranged above the output end of the belt conveyor, so that the packaging box is in contact with the covers stacked in the cover unit, the two partition frames in the cover unit are inserted into the gap above the lowermost cover before the packaging box is in contact with the cover, the two partition frames provide support above the lowermost cover, so that the packaging box can be smoothly clamped with the cover, after the clamping is completed, the packaging box is gradually lowered by the lifting unit, and the separation plate rotates, the distance between the separation end of the separation plate and the horizontal end face of the partition frame in the vertical direction gradually increases, so that the lowermost cover can be gradually stripped, and when the cover provided with the cover is lowered to the lowest height, the packaging box provided with the cover is pushed down.

[0007] In order to solve the problems in the prior art, the blueberry weighing and packaging equipment with the turnover feeding structure is provided, which comprises a belt conveyor for conveying blueberries and a packaging box arranged at the output end of the belt conveyor, a cover unit with covers stacked inside is arranged above the output end of the belt conveyor, there is a gap between the adjacent covers, a lifting unit is arranged below the cover unit to support the packaging box and drive the packaging box to ascend and descend in the vertical direction, the cover unit comprises two partition frames moving towards or away from each other in the horizontal direction, a separation plate is hinged to the partition frame, one end of the separation plate facing the cover is a separation end, before the packaging box ascends and contacts the cover, the partition frame can drive the separation plate to slide into the gap between the adjacent covers, the distance between the separation end and the horizontal end face of the partition frame in the vertical direction is zero, and after the packaging box is covered, the distance between the separation end and the horizontal end face of the partition frame in the vertical direction gradually increases.

[0008] Preferably, an inclined rod is fixedly arranged at the end of the separation plate away from the cover, the extension direction of the inclined rod forms an acute angle with the horizontal end face of the separation frame, and a pushing unit is arranged on one side of the inclined rod to push the inclined rod to rotate around the hinge between the separation plate and the separation frame.

[0009] Preferably, the pushing unit comprises a pushing frame arranged on the separation frame to move in the horizontal direction, and a roller is arranged at the end of the pushing frame facing the inclined rod to roll with the inclined rod.

[0010] Preferably, a spring is arranged between the inclined rod and the separation frame to keep the vertical distance between the separation end and the horizontal end face of the separation frame to be zero.

[0011] Preferably, the cover closing unit comprises a placing bin for placing the cover, the covers arranged in the placing bin are stacked in the vertical direction, a transmission belt is arranged on the side wall of the placing bin to rotate in the vertical direction, and separation blocks are uniformly distributed on the transmission belt, and the separation blocks on the side of the transmission belt facing the covers are sequentially inserted into the gaps between adjacent two covers in the vertical direction.

[0012] Preferably, the cover closing unit further comprises a driving unit for driving the two separation frames to move towards or away from each other, the driving unit comprises a second screw rod arranged to rotate horizontally, the second screw rod has two threads with opposite screw directions, and the two separation frames are threadedly connected with the two threads, respectively.

[0013] Preferably, the lifting unit comprises a weighing plate for receiving the packaging box.

[0014] Preferably, a lifting block is fixedly arranged at the lower part of the weighing plate, a support ring capable of providing support to the edge of the packaging box is sleeved on the periphery of the lifting block, the support ring is movable along the height direction of the lifting block, and when the support ring provides support to the edge of the packaging box, the bottom of the packaging box is out of contact with the weighing plate.

[0015] Preferably, a lifting unit is arranged on one side of the lifting block to drive the lifting block to move in the vertical direction, and the support ring moves synchronously with the lifting block when the lifting block moves in the vertical direction.

[0016] The application also relates to a blueberry weighing and packaging method with a turnover feeding structure, and the method adopts a blueberry weighing and packaging device with a turnover feeding structure. S1, placing the packaging box on the lifting unit, and feeding the blueberries into the packaging box through the belt conveyor, and stopping the belt conveyor when the blueberries in the packaging box reach the rated weight; S2, the lifting unit drives the packaging box to ascend and contact the lowermost cover in the cover closing unit, and the two separation frames in the cover closing unit slide into the gap above the cover to provide support for the cover; S3, the lifting unit continues to lift the packaging box, the packaging box is clamped with the cover, then the separation plate rotates, the lowermost cover is separated from the cover accumulated in the cover closing unit, and the lifting unit drives the packaging box to descend while the cover is separated, and the packaging box with the cover is lowered to the lowest position and discharged from the output end of the belt conveyor.

[0017] The beneficial effects of the present application compared with the prior art are: 1, the lifting unit is provided, so that the lifting unit supports the packaging box, when the weight of the blueberry reaches the rated weight, the lifting unit drives the packaging box to rise, and the cover closing unit is directly arranged above the output end of the belt conveyor, so that the rising packaging box contacts the cover accumulated in the cover closing unit, the two separation frames in the cover closing unit are inserted into the gap above the lowermost cover before the packaging box contacts the cover, the two separation frames provide support above the lowermost cover, so that the packaging box can be smoothly clamped with the cover, after clamping, the lifting unit drives the packaging box to gradually descend, and the separation plate rotates, the distance between the separation end of the separation plate and the horizontal end face of the separation frame in the vertical direction gradually increases, so that the lowermost cover can be gradually stripped, when the packaging box with the cover on the upper part thereof is lowered to the lowest height, the packaging box with the cover is pushed down. The cover closing unit is directly arranged above the output end of the belt conveyor, so that the packaging box only needs to be positioned once, the closing efficiency is improved, and the cover can be smoothly clamped with the packaging box, and the lowermost cover can be smoothly separated from the cover accumulated in the cover closing unit after clamping with the packaging box.

[0018] 2, by setting the supporting ring, the edge of the packaging box is supported by the supporting ring when clamping, and the packaging box and the weighing plate are in a separated state, so when the cover is covered on the packaging box, the extrusion force received by the packaging box is supported by the supporting ring, and the packaging box does not produce extrusion force on the weighing plate, thereby prolonging the service life of the weighing plate and ensuring the weighing accuracy of the weighing plate. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a perspective view of a blueberry weighing and packaging equipment with a turnover type feeding structure.

[0020] Figure 2 is a sectional perspective view of the blueberry weighing and packaging equipment with a turnover type feeding structure when the packaging box is lifted and clamped with the cover.

[0021] Figure 3 is a perspective view of a blueberry weighing and packaging equipment with a turnover type feeding structure. Figure 2 is a partial enlarged view of A in the embodiment.

[0022] Figure 4 is a blueberry weighing and packaging equipment with a turnover feeding structure of the present invention Figure 2 is a partial enlarged view of B in the above figure.

[0023] Figure 5 is a cross-sectional view of the blueberry weighing and packaging equipment with a turnover feeding structure of the present invention when the packaging box placed in the equipment receives the blueberries Figure 1 .

[0024] Figure 6 is a partial enlarged view of C in the above figure. Figure 5

[0025] Figure 7 is a cross-sectional view of the blueberry weighing and packaging equipment with a turnover feeding structure of the present invention when the packaging box placed in the equipment receives the blueberries Figure 1 .

[0026] Figure 8 is a partial enlarged view of D in the above figure. Figure 7

[0027] Figure 9 is a cross-sectional view of the blueberry weighing and packaging equipment with a turnover feeding structure of the present invention when the packaging box placed in the equipment receives the blueberries Figure 2 .

[0028] Figure 10 is a partial enlarged view of E in the above figure. Figure 9

[0029] Figure 11 is a partial enlarged view of F in the above figure. Figure 9

[0030] Figure 12 is a cross-sectional view of the blueberry weighing and packaging equipment with a turnover feeding structure of the present invention when the packaging box placed in the equipment receives the blueberries

[0031] Figure 13 is a partial enlarged view of G in the above figure. Figure 12

[0032] The figure is marked as: ​​​​​1, packing box; 11, cover; 2, belt conveyor; 3, covering unit; 31, partition frame; 32, separation plate; 33, pushing unit; 331, roller; 332, pushing frame; 333, first rotary driver; 334, first screw rod; 34, inclined rod; 35, spring; 36, placing bin; 37, transmission belt; 371, partition block; 38, driving unit; 381, second screw rod; 382, second rotary driver; 4, lifting unit; 41, weighing plate; 42, supporting ring; 43, lifting block; 44, lifting unit; 441, third rotary driver; 442, third screw rod; 443, extension ear. DETAILED DESCRIPTION

[0033] In order to further understand the features, technical means and specific purposes and functions of the present application, the present application will be described in further detail below in conjunction with the drawings and specific embodiments.

[0034] Reference Figures 1-3 , Figure 5 , Figure 6 and Figure 8 : A blueberry weighing and packing device with a turnover feeding structure, comprising a belt conveyor 2 for conveying blueberries and a packing box 1 arranged at the output end of the belt conveyor 2; a covering unit 3 with covers 11 stacked inside is arranged above the output end of the belt conveyor 2, there are gaps between adjacent covers 11, a lifting unit 4 is arranged below the covering unit 3 for receiving the packing box 1 and driving the packing box 1 to move vertically, the covering unit 3 comprises two partition frames 31 moving towards or away from each other in the horizontal direction, a separation plate 32 is hinged to the partition frame 31, one end of the separation plate 32 facing the cover 11 is a separation end, before the packing box 1 rises and contacts the cover 11, the partition frame 31 can drive the separation plate 32 to slide into the gap between adjacent covers 11, the distance between the separation end and the horizontal end face of the partition frame 31 in the vertical direction is zero, after the packing box 1 is covered with the cover 11, the distance between the separation end and the horizontal end face of the partition frame 31 in the vertical direction gradually increases.

[0035] In the existing blueberry weighing and packaging equipment, the belt conveyor 2 mainly bears the conveying of blueberries, and the packaging box 1 is placed at the output end of the belt conveyor 2, so that the packaging box 1 receives the falling blueberries. When the weight of the blueberries in the packaging box 1 reaches the preset rated weight, the belt conveyor 2 stops conveying, and then the packaging box 1 containing the blueberries is pushed out, and the packaging box 1 without containing the blueberries is placed on the output end of the belt conveyor 2. The packaging box 1 containing the blueberries is discharged from the output end of the belt conveyor 2 and passes through the closing unit 3. The existing closing unit 3 has a complex structure, mainly including three processes of positioning, separating and closing the lid 11. First, the packaging box 1 containing the blueberries needs to stop moving when passing through the closing unit 3. The closing unit 3 first positions the packaging box 1, and then separates one lid 11 vertically stacked in the lowermost layer of the closing unit 3. Since the packaging box 1 and the lid 11 are respectively provided with buckles and slots for clamping, the special clamping unit is needed to clamp a circle around the lid 11, and then the separated lid 11 is lowered to the packaging box 1 to close the packaging box 1. However, this is low in efficiency. If the existing closing unit 3 is directly arranged above the output end of the belt conveyor 2, the special clamping unit cannot smoothly pass from the side of the output end of the belt conveyor 2 due to its large size during pressing of the lid 11. Conversely, if the special clamping unit is not used, the ordinary clamping unit cannot provide downward pressing force to the edge of the lid 11, resulting in that the buckle on the packaging box 1 cannot be clamped with the slot on the lid 11 when the lid 11 is closed with the packaging box 1.

[0036] In order to avoid the above situation, the mechanism of the existing blueberry weighing and packaging equipment is redesigned, so that the closing unit 3 can be directly arranged above the output end of the belt conveyor 2, so that the packaging box 1 containing the blueberries does not need to be positioned before the lid 11 is closed, which improves the speed of closing the lid 11 on the packaging box 1, and also ensures that the lid 11 can be stably closed with the packaging box 1. The specific structure and working process of the blueberry weighing and packaging equipment of the present application are as follows: Firstly, the packaging box 1 is pushed to the output end of the belt conveyor 2, the belt conveyor 2 delivers the blueberries into the packaging box 1, the packaging box 1 is supported by the lifting unit 4, the upper end of the lifting unit 4 is provided with a weighing plate 41, when the blueberries are poured into the packaging box 1 by the belt conveyor 2, the weighing plate 41 weighs the packaging box 1 containing the blueberries, when the weight of the blueberries contained by the packaging box 1 reaches the rated weight, the belt conveyor 2 stops running, and the lifting unit 4 starts and drives the packaging box 1 to rise, before the buckle on the packaging box 1 is clamped with the clamping groove on the cover 11, the two partition racks 31 drive the separation plates 32 to be inserted into the gap above the lowermost cover 11 in advance, that is, there is a gap between the lowermost cover 11 and the second-to-last cover 11, the two partition racks 31 are inserted into the gap respectively before the packaging box 1 is closed with the cover 11, so that the two partition racks 31 can provide support force for the lowermost cover 11, when the lifting unit 4 lifts the packaging box 1 to rise, the buckle on the packaging box 1 is clamped with the clamping groove on the cover 11, the packaging box 1 generates a vertical upward pushing force on the cover 11, and the two partition racks 31 inserted into the gap can provide support force for the cover 11, which ensures that the covers 11 stacked in the closing unit 3 will not be pushed upward, and ensures that the lowermost cover 11 can be smoothly clamped with the packaging box 1, since the lifting unit 4 only needs to provide driving force in the vertical direction for the packaging box 1, the size of the lifting unit 4 can be smaller than the horizontal cross-sectional size of the packaging box 1, which ensures that the lifting unit 4 will not interfere with the belt conveyor 2 when passing through the side of the output end of the belt conveyor 2. When the packaging box 1 is closed with the cover 11, the separation plate 32 rotates on the partition rack 31, the vertical distance between the separation end of the separation plate 32 and the horizontal end face of the partition rack 31 gradually increases, and at the same time the lifting unit 4 drives the packaging box 1 to descend. Under the action of the separation plate 32 and the partition rack 31, the gap between the lowermost cover 11 and the second-to-last cover 11 becomes larger and larger, until the lowermost cover 11 is smoothly separated from the second-to-last cover 11, so that the cover 11 provided on the packaging box 1 can be reset with the packaging box 1, when the packaging box 1 is lowered to the lowest height, the packaging box 1 with the cover 11 is pushed out, and the packaging box 1 without containing blueberries is pushed to the output end of the belt conveyor 2, and the cycle is repeated.

[0037] The lifting unit 4 is arranged to support the packaging box 1, and when the weight of the blueberries reaches the rated weight, the lifting unit 4 drives the packaging box 1 to ascend, and the closing unit 3 is directly arranged above the output end of the belt conveyor 2, so that the ascending packaging box 1 is in contact with the caps 11 stacked in the closing unit 3, and the two partition frames 31 in the closing unit 3 are inserted into the gap above the lowermost cap 11 before the packaging box 1 is in contact with the cap 11, and the two partition frames 31 provide support above the lowermost cap 11, so that the packaging box 1 can be smoothly connected with the cap 11, and after the connection is completed, the lifting unit 4 drives the packaging box 1 to gradually descend, and the separation plate 32 rotates, the distance between the separation end of the separation plate 32 and the horizontal end face of the partition frame 31 in the vertical direction gradually increases, so that the lowermost cap 11 can be gradually stripped, and when the packaging box 1 with the cap 11 arranged thereon descends to the lowest height, the packaging box 1 with the cap 11 arranged thereon is pushed down. The closing unit 3 is directly arranged above the output end of the belt conveyor 2, so that the packaging box 1 only needs to be positioned once, the closing efficiency is improved, and the cap 11 can be smoothly connected with the packaging box 1, and the lowermost cap 11 can be smoothly separated from the caps 11 stacked in the closing unit 3 after being connected with the packaging box 1.

[0038] With reference to Figure 6 : The separation plate is obliquely fixed at one end away from the cap 11, and an inclined rod 34 is arranged at the end, and the angle between the extension direction of the inclined rod 34 and the horizontal end face of the partition frame 31 is an acute angle, and a pushing unit 33 is arranged at one side of the inclined rod 34 to push the inclined rod 34 to rotate around the hinge joint between the separation plate 32 and the partition frame 31.

[0039] Since the partition frame 31 needs to drive the separation plate 32 to be inserted into the gap between the adjacent caps 11, if the driver is directly arranged at the end of the separation plate 32, the driver will hinder the normal movement of the partition frame 31, in order to ensure that the separation plate 32 can be normally driven to rotate, the inclined rod 34 and the pushing unit 33 are arranged at the side of the separation plate 32 away from the cap 11, when the partition frame 31 is completely inserted into the gap between the two caps 11, the inclined rod 34 and the pushing unit 33 are located outside the closing unit 3, and when the pushing unit 33 pushes the inclined rod 34 to rotate, the separation plate 32 hinged to the partition frame 31 can be smoothly rotated.

[0040] With reference to Figure 6 and Figure 7 : The pushing unit 33 comprises a pushing frame 332 arranged on the partition frame 31 and moving in the horizontal direction, and a roller 331 rotatingly arranged at one end of the pushing frame 332 and rolling with the inclined rod 34.

[0041] The rolling wheel 331 is arranged on the pushing frame 332 and rolls with the inclined rod 34, so that the pushing rod can push the inclined rod 34 through the rolling wheel 331 when moving in the horizontal direction, and the pushing rod rotates around the hinge between the separation plate 32 and the partition frame 31, which reduces the abrasion of the inclined rod 34 when the pushing unit 33 pushes the inclined rod 34 to rotate. The pushing unit 33 further comprises a first screw rod 334 and a first rotary driver 333. The first screw rod 334 is arranged on the partition frame 31 and rotates in the horizontal direction. The first screw rod 334 horizontally penetrates the pushing frame 332 and is in threaded cooperation with the pushing frame 332. The first rotary driver 333 is arranged at the end of the first screw rod 334 and is used to drive the first screw rod 334 to rotate. The first rotary driver 333 is preferably a servo motor.

[0042] With reference to Figure 10 A spring 35 is arranged between the inclined rod 34 and the partition frame 31 to keep the vertical distance between the separation end and the horizontal end surface of the partition frame 31 to be zero.

[0043] The two ends of the spring 35 are fixedly connected with the inclined rod 34 and the partition frame 31, respectively. When the inclined rod 34 is pushed and rotated by the pushing unit 33, the included angle between the inclined rod 34 and the horizontal end surface of the partition frame gradually increases, and the spring 35 arranged between the inclined rod 34 and the partition frame 31 is gradually stretched. When the lowermost cover 11 in the cover unit 3 is separated, the rolling wheel 331 moves away from the cover 11 under the driving of the pushing frame 332, and the spring 35 pulls the inclined rod 34 to rotate and reset.

[0044] With reference to Figure 2 And Figure 3 The cover unit 3 comprises a placing bin 36 for placing the covers 11. The covers 11 in the placing bin 36 are stacked in the vertical direction. A transmission belt 37 is arranged on the side wall of the placing bin 36 and rotates in the vertical direction. The transmission belt 37 is uniformly distributed with partition blocks 371. The partition blocks 371 on the side of the transmission belt 37 towards the covers 11 are sequentially inserted into the gaps between the adjacent two covers 11 in the vertical direction.

[0045] The placing bin 36 is a through structure, two transmission belts 37 are symmetrically arranged on the two sides of the placing bin 36, and the partition block 371 capable of extending into the gap between the adjacent two covers 11 is arranged on the transmission belt 37, so that the covers 11 stacked in the covering unit 3 can be sequentially received by the partition block 371. When the lowermost cover 11 is separated, the transmission belt 37 rotates, and the transmission belt 37 drives the stacked covers 11 to descend through the partition block 371. The distance of the stacked covers 11 driven by the transmission belt 37 to descend each time is constant, which ensures that the horizontal plane height of the partition frame 31 is consistent with the gap height above the lowermost cover 11 after the stacked covers 11 stop moving each time, thereby ensuring that the partition frame 31 can smoothly slide into the gap above the lowermost cover 11.

[0046] With reference to Figure 7 , Figure 9 and Figure 10 : The covering unit 3 further comprises a driving unit 38 for driving the two partition frames 31 to move towards or away from each other. The driving unit 38 comprises a second screw rod 381 horizontally arranged and provided with two threads with opposite screw directions. The two partition frames 31 are threadedly connected with the two threads, respectively.

[0047] The driving unit 38 further comprises a second rotary driver 382 arranged at the end of the second screw rod 381. The second rotary driver 382 is preferably a servo motor. The second rotary driver 382 drives the screw rod to rotate, and the second screw rod 381 is arranged to enable the two partition frames 31 to move towards or away from each other synchronously.

[0048] With reference to Figure 12 : The lifting unit 4 comprises a weighing plate 41 for receiving the packaging box 1.

[0049] When the blueberries are put into the packaging box 1, the weighing plate 41 weighs the blueberries in the packaging box 1 in real time.

[0050] With reference to Figure 12 : A lifting block 43 is fixedly arranged at the lower part of the weighing plate 41. A support ring 42 capable of providing support to the edge of the packaging box 1 is arranged around the lifting block 43. The support ring 42 is movable along the height direction of the lifting block 43. When the support ring 42 provides support to the edge of the packaging box 1, the bottom of the packaging box 1 is out of contact with the weighing plate 41.

[0051] When the packaging box 1 is used to contain blueberries, the supporting ring 42 is in the lowest position, at this time, the supporting ring 42 does not support the upper part of the packaging box 1, the packaging box 1 and the blueberries in the packaging box 1 are supported by the weighing plate 41, the weighing plate 41 weighs the total weight of the packaging box 1 containing the blueberries, when the total weight of the packaging box 1 containing the blueberries reaches the rated weight, the lifting unit 4 drives the packaging box 1 to rise, at this time, the supporting ring 42 arranged on the periphery of the lifting block 43 starts to rise relative to the lifting block 43, the lifting ring is driven by a hydraulic mode, when the lifting ring rises to the highest position, the lifting ring supports the edge of the packaging box 1, the bottom of the packaging box 1 is out of contact with the weighing plate 41, when the packaging box 1 and the cover 11 are clamped with each other, the separating frame 31 and the lifting ring extrude the packaging box 1 and the cover 11, at this time, the packaging box 1 does not extrude the weighing plate 41, which prolongs the service life of the weighing plate 41 and ensures the accuracy of the weighing plate 41 when weighing the blueberries.

[0052] With reference to Figure 4 And Figure 5 : A lifting unit 44 is arranged on one side of the lifting block 43 and used to drive the lifting block 43 to move in the vertical direction, when the lifting block 43 rises and falls in the vertical direction, the supporting ring 42 moves synchronously with the lifting block 43.

[0053] The lifting unit 44 comprises a third rotary driver 441, a third screw rod 442 and an extension ear 443, the extension ear 443 is horizontally fixedly arranged on the side wall of the lifting block 43, the third screw rod 442 penetrates through the extension ear 443 in the vertical direction and is threadedly matched with the extension ear 443, the third rotary driver 441 is arranged at the end of the third screw rod 442, the third rotary driver 441 is used to drive the third screw rod 442 to rotate, and the third rotary driver 441 is preferably a servo motor.

[0054] With reference to Figures 1-13 : The application also relates to a blueberry weighing and packaging method with a turnover feeding structure, which adopts the blueberry weighing and packaging equipment with the turnover feeding structure, and the specific process is as follows: S1, the packaging box 1 is placed on the lifting unit 4, the blueberries are put into the packaging box 1 through the belt conveyor 2, and the belt conveyor 2 stops running when the blueberries in the packaging box 1 reach the rated weight; S2, the lifting unit 4 drives the packaging box 1 to rise and contact the cover 11 in the lowermost layer of the cover unit 3, and the two separating frames in the cover unit 3 slide into the gap above the cover 11 and support the cover 11; S3, the lifting unit 4 continues to lift the packaging box 1, the packaging box 1 is clamped with the cover 11, and then the separation plate 32 rotates, so that the lowermost cover 11 is separated from the cover 11 stacked in the cover unit 3, and the lifting unit 4 drives the packaging box 1 to descend while the cover 11 is separated, and the packaging box 1 provided with the cover 11 descends to the lowest position and is discharged from the output end of the belt conveyor 2.

[0055] Working principle: first, the packaging box 1 is pushed to the output end of the belt conveyor 2, the belt conveyor 2 delivers blueberries into the packaging box 1, the packaging box 1 is supported by the lifting unit 4, the upper end of the lifting unit 4 is provided with a weighing plate 41, when the blueberries are poured into the packaging box 1 by the belt conveyor 2, the weighing plate 41 weighs the packaging box 1 containing the blueberries, when the weight of the blueberries contained in the packaging box 1 reaches the rated weight, the belt conveyor 2 stops running, and the lifting unit 4 starts and drives the packaging box 1 to rise, before the buckle on the packaging box 1 is clamped with the clamping groove on the cover 11, the two partition racks 31 drive the separation plate 32 to be inserted into the gap above the lowermost cover 11 in advance, that is, there is a gap between the lowermost cover 11 and the second last cover 11, the two partition racks 31 are inserted into the gap before the packaging box 1 is closed with the cover 11, so that the two partition racks 31 can provide support force for the lowermost cover 11, when the lifting unit 4 lifts the packaging box 1 upward, the buckle on the packaging box 1 is clamped with the clamping groove on the cover 11, the packaging box 1 generates a vertical upward pushing force on the cover 11, and the two partition racks 31 inserted into the gap can provide support force for the cover 11, which ensures that the cover 11 stacked in the cover unit 3 will not be pushed upward, and also ensures that the lowermost cover 11 can be smoothly clamped with the packaging box 1. Since the lifting unit 4 only needs to provide driving force in the vertical direction for the packaging box 1, the size of the lifting unit 4 can be smaller than the horizontal cross-sectional size of the packaging box 1, which ensures that the lifting unit 4 will not interfere with the belt conveyor 2 when passing through the output end of the belt conveyor 2. When the packaging box 1 is closed with the cover 11, the separation plate 32 rotates on the partition rack 31, the vertical distance between the separation end of the separation plate 32 and the horizontal end face of the partition rack 31 gradually increases, and at the same time the lifting unit 4 drives the packaging box 1 to descend. Under the action of the separation plate 32 and the partition rack 31, the gap between the lowermost cover 11 and the second last cover 11 becomes larger and larger, until the lowermost cover 11 is smoothly separated from the second last cover 11, so that the cover 11 provided on the packaging box 1 can be reset with the packaging box 1. When the packaging box 1 descends to the lowest height, the packaging box 1 with the cover 11 is pushed out, and the packaging box 1 without the blueberries is pushed to the output end of the belt conveyor 2, and the cycle is repeated.

[0056] The above embodiments only express one or several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the protection scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A blueberry weighing and packaging device with a flip-type feeding structure, comprising a belt conveyor (2) for conveying blueberries and a packaging box (1) set at the output end of the belt conveyor (2). Its features are, Above the output end of the belt conveyor (2), there is a closing unit (3) with lids (11) stacked inside. There is a gap between adjacent lids (11). Below the closing unit (3), there is a lifting unit (4) that receives the packaging box (1) and drives the packaging box (1) to rise and fall in the vertical direction. The closing unit (3) includes two partitions (31) that move towards or away from each other in the horizontal direction. A partition plate (32) is hinged on the partition. The end of the partition plate (32) facing the lid (11) is the separation end. Before the packaging box (1) rises and contacts the lid (11), the partition (31) can drive the partition plate (32) to slide into the gap between adjacent lids (11). The distance between the separation end and the horizontal end face of the partition (31) in the vertical direction is zero. After the packaging box (1) is closed with the lid (11), the distance between the separation end and the horizontal end face of the partition (31) in the vertical direction gradually increases.

2. The blueberry weighing and packaging equipment with a flip-type feeding structure according to claim 1, characterized in that, An inclined rod (34) is fixedly installed at the end of the partition plate away from the cover (11). The angle between the extension direction of the inclined rod (34) and the horizontal end face of the partition frame (31) is an acute angle. A push unit (33) is provided on one side of the inclined rod (34) to push the inclined rod (34) to rotate around the hinge point between the partition plate (32) and the partition frame (31).

3. The blueberry weighing and packaging equipment with a flip-type feeding structure according to claim 2, characterized in that, The pushing unit (33) includes a pushing frame (332) that is moved horizontally on the partition frame (31), and a roller (331) that is rotatably disposed on the end of the pushing frame (332) facing the tilting rod (34) and rolls with the tilting rod (34).

4. A blueberry weighing and packaging device with a flip-type feeding structure according to claim 2, characterized in that, A spring (35) is provided between the tilting rod (34) and the separator (31) to keep the vertical distance between the separation end and the horizontal end face of the separator (31) zero.

5. A blueberry weighing and packaging device with a flip-type feeding structure according to claim 1, characterized in that, The closing unit (3) includes a placement chamber (36) for placing the lid (11). The lids (11) located in the placement chamber (36) are stacked vertically. A transmission belt (37) is rotatably arranged on the side wall of the placement chamber (36) in the vertical direction. Dividing blocks (371) are evenly distributed on the transmission belt (37). The dividing blocks (371) on the side of the transmission belt (37) facing the lid (11) are inserted into the gap between two adjacent lids (11) in the vertical direction.

6. A blueberry weighing and packaging device with a flip-type feeding structure according to claim 1, characterized in that, The cover unit (3) also includes a drive unit (38) for driving the two partitions (31) to move toward or away from each other. The drive unit (38) includes a second lead screw (381) that is horizontally rotatable. The second lead screw (381) has two threads with opposite helical directions. The two partitions (31) are respectively threaded into the two threads.

7. A blueberry weighing and packaging device with a flip-type feeding structure according to claim 1, characterized in that, The lifting unit (4) includes a weighing plate (41) for supporting the packaging box (1).

8. A blueberry weighing and packaging device with a flip-type feeding structure according to claim 7, characterized in that, A lifting block (43) is fixedly installed at the lower part of the weighing plate (41). A support ring (42) is sleeved around the lifting block (43) to provide support for the edge of the packaging box (1). The support ring (42) can move along the height direction of the lifting block (43). When the support ring (42) provides support for the edge of the packaging box (1), the bottom of the packaging box (1) is disengaged from the weighing plate (41).

9. A blueberry weighing and packaging device with a flip-type feeding structure according to claim 8, characterized in that, A lifting unit (44) is provided on one side of the lifting block (43) for driving the lifting block (43) to move in the vertical direction. When the lifting block (43) moves up and down in the vertical direction, the support ring (42) moves synchronously with the lifting block (43).

10. A method for weighing and packaging blueberries with a flip-feed structure, employing a blueberry weighing and packaging device with a flip-feed structure as described in any one of claims 1-9, characterized in that, The specific process is as follows: S1. Place the packaging box (1) on the lifting unit (4) and put the blueberries into the packaging box (1) by the belt conveyor (2). After the blueberries in the packaging box (1) reach the rated weight, the belt conveyor (2) stops running. S2, The lifting unit (4) drives the packaging box (1) to rise and contact the bottommost lid (11) in the closing unit (3). The two separation brackets in the closing unit (3) slide into the gap above the lid (11) and provide support for the lid (11). S3. The lifting unit (4) continues to lift the packaging box (1), and the packaging box (1) and the lid (11) are engaged. Then the separation plate (32) rotates, so that the bottom lid (11) is separated from the lid (11) piled in the closing unit (3). While the lid (11) is separated, the lifting unit (4) drives the packaging box (1) to descend. The packaging box (1) with the lid (11) is lowered to the lowest position and discharged from the output end of the belt conveyor (2).

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