Paper cup conveying device of paper cup forming machine

Abstract

The invention discloses a paper cup conveying device of a paper cup forming machine, the paper cup conveying device comprises a plurality of vacuum tubes used for conveying formed paper cups and a conveying device used for collecting stacked formed paper cups, each vacuum tube is communicated with the conveying device through a pipeline connecting mechanism, and when the position of a forming device in a workshop needs to be adjusted, the vacuum tubes are connected with the conveying device through a pipeline connecting mechanism. The vacuum tube can be rotationally adjusted through a threaded structure without being detached, the time for detaching the vacuum tube is saved, the function of recognizing the number of formed paper cups through a traditional photoelectric sensor is achieved, the weight measuring function is further added, and under the condition that the number detected by the photoelectric sensor and the number detected by the forming paper cups are consistent, the detection efficiency is improved. When the paper cups are stacked, the stacked formed paper cups are placed to the connecting base for subsequent conveying only when the paper cups are stacked, and under the condition that the two paper cups are sleeved and the paper cups are damaged or notched, whether the weight meets the weight of the preset paper cup number or not can be judged through weight change, and complete control over the standard of the formed paper cups is achieved.

Description

Technical Field

[0001] The invention belongs to the field of paper cup forming equipment, and in particular relates to a paper cup conveying device of a paper cup forming machine. Background Art

[0002] Paper cup forming machine is a kind of mechanical equipment specially used for producing paper cups, which is widely used in food and beverage industry.

[0003] The paper cup forming machine includes a paper feeding device, a cutting device, a forming device and a conveying device. As for the conveying device, the formed paper cups are often transported from the forming device of the production line to the collection bin for stacking in sequence through several vacuum pipes relying on air pressure. The collection bin uses sensors to stack a preset number of formed paper cups, and then store them on the conveyor belt to enter the subsequent packaging stage.

[0004] When installing vacuum pipes, they are often installed according to the locations of the molding devices and conveying devices in the workshop. When adding molding devices or renovating the workshop to adjust the location of the molding devices in order to increase the work output, the installed vacuum pipes need to be dismantled and re-planned and installed according to the current location. This not only increases the time for renovation, but also affects the output, resulting in additional economic expenditure.

[0005] At the same time, for sensors that count when collecting formed paper cups, although the photoelectric counting method alone can maintain accurate measurement in most cases, it is unable to accurately determine the number of paper cups when the speed is too fast or when two paper cups are stacked together for transportation. At the same time, for broken paper cups, the number will be detected according to the standard paper cups and cannot be identified, which creates a burden on the subsequent packaging process and increases the breakage rate. Summary of the invention

[0006] In view of the above defects, the present invention provides a paper cup conveying device for a paper cup forming machine, comprising a plurality of vacuum tubes for conveying formed paper cups and a conveying device for collecting stacked formed paper cups, each of the vacuum tubes is connected to the conveying device through a pipeline connection mechanism, the pipeline connection mechanism comprises a steering tube for connecting at a bend and an adjusting tube for connecting with the conveying device, and a sensor for measuring the number of stored formed paper cups is installed at the adjusting tube;

[0007] The conveying device includes a retention mechanism, a connecting seat and a recovery bin which are sequentially connected from top to bottom. The retention mechanism includes a measuring mechanism which weighs, verifies and conveys the stacked formed paper cups after being conveyed by the vacuum tube. A conduit for conveying the formed paper cups conveyed by the measuring mechanism is installed at the connecting seat. A discharge mechanism for recovering the formed paper cups conveyed by the conduit is installed on the top of the recovery bin. A conveying mechanism for conveying the formed paper cups conveyed by the discharge mechanism is installed inside the recovery bin.

[0008] Furthermore, the cross-sections of the vacuum tube connection ends are inlaid with magnetic rings;

[0009] The regulating tube comprises a tube body and a connecting ring, wherein the connecting ring is threadedly connected to the threads at the bottom of the inner ring of the tube body through a threaded layer provided on the outer ring, and four limiting columns distributed in an equidistant annular array are installed at the bottom of the connecting ring;

[0010] A slot adapted to the magnetic ring is provided on the top of the tube body, an annular magnet layer is embedded in the slot, and a sensor for detecting the number of formed paper cups passing through is embedded in the inner wall of the tube body.

[0011] Furthermore, the retention mechanism comprises a top plate, a middle plate and a bottom plate connected in sequence from top to bottom, a plurality of steering grooves corresponding to the conduits are opened on the top of the top plate, the interior of each steering groove is hinged to the measuring mechanism through a hinged rod, and the hinged rod is driven by a steering motor installed at the bottom of the top plate;

[0012] The inner wall of the middle plate is fixed with a mounting bar for supporting the top plate, and the front of the middle plate is installed with a plurality of display panels corresponding to the steering slots and a brake switch for controlling the steering motor;

[0013] The bottom plate is fixed to the bottom of the middle plate and is provided with a plurality of drop openings respectively corresponding to the turning grooves.

[0014] Furthermore, the measuring mechanism includes a weighing panel and a steering ring. The steering ring is fixed to the hinged rod through a hinged seat at the rear end. The weighing panel is installed in a placement groove opened inside the steering ring. An electromagnetic coil is installed at the bottom end of the inner ring of the placement groove. An annular electromagnet adapted to the electromagnetic coil is inlaid at the bottom end of the placement groove. A limit ring is fixed to the top of the placement groove for limiting the weighing panel.

[0015] Furthermore, each of the unloading mechanisms corresponds to the corresponding conduit at the top, and each unloading mechanism is installed inside the recovery bin. The upper surface of the recovery bin is provided with a plurality of unloading ports for each unloading mechanism to rotate, and the inner wall of each unloading port is fixed with a rubber brush strip for filling the gap between the unloading mechanism and the unloading mechanism.

[0016] Furthermore, each of the unloading mechanisms includes a transmission shaft, the front and rear ends of the transmission shaft are respectively connected to bearings embedded in the inner wall of the recovery bin, and the rear end of the transmission shaft passes through the back of the recovery bin and is connected to the driving mechanism, a triangular prism is fixed to the outer ring of the transmission shaft, the three faces of the triangular prism are all concave surfaces for placing stacked formed paper cups, and the three edges of the triangular prism are fixed with an outward wing adapted to the concave surface.

[0017] Furthermore, a partition is fixed on the inner wall of the recovery bin, a conveying channel for a conveying mechanism to pass through is opened in the middle of the partition, the conveying mechanism is a belt conveyor, a conveying belt of the belt conveyor and the conveying channel are on the same horizontal plane, and a through opening I and a through opening II for the conveying belt to pass through are respectively opened on the right side and bottom surface of the recovery bin;

[0018] The inner wall of the recovery bin is movably connected with a set of converging side panels, the right ends of the two converging side panels are respectively in contact with the inner wall of the through opening I, and one side of the through opening I is converging into a narrow opening by the through opening I.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. Compared with traditional vacuum tubes, when the position of the molding device in the workshop needs to be adjusted and the direction of the vacuum tube also needs to be adjusted accordingly, there is no need to disassemble it. The threaded structure can be used for rotation adjustment, which saves the time of disassembling the vacuum tube and ensures normal production capacity;

[0021] 2. In addition to the traditional photoelectric sensor function of identifying the number of formed paper cups, the function of weight measurement is also added. When the numbers detected by the two are consistent, the stacked formed paper cups will be placed on the connecting seat for subsequent transportation. In the case of two paper cups being set together, or paper cups being damaged or notched, the change in weight can be used to determine whether the weight meets the preset number of paper cups, thus achieving complete control of the standards for formed paper cups;

[0022] 3. The gradually converging side panels are set to converge the loosely stacked formed paper cups during the sliding process, ensuring that they will not fall during transportation on the subsequent conveyor belt. At the same time, it is convenient for subsequent manual observation of the standard length to determine the number of formed paper cups. At the same time, the converging width can be adjusted in real time according to the preset stacking quantity, which has good adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a stereogram of the present invention.

[0024] Figure 2 It is a schematic diagram of the structure of the regulating tube in the present invention.

[0025] Figure 3 It is a structural schematic diagram of the truncated state of the retention mechanism in the present invention.

[0026] Figure 4 It is a schematic diagram of the structure of the measuring mechanism in the present invention.

[0027] Figure 5 It is a cross-sectional view of the recovery bin in the present invention in the front view direction.

[0028] Figure 6 It is a three-dimensional diagram of the feeding mechanism in the present invention.

[0029] Figure 7 It is a cross-sectional view of the recovery bin in the present invention when viewed from above.

[0030] Figure 8 It is a three-dimensional view of a straight tube-shaped catheter in the present invention.

[0031] Fig. 9 It is a three-dimensional view of the cylindrical catheter in the present invention.

[0032] In the figure: 1. retention mechanism; 101. top plate; 102. measuring mechanism; 1021. weighing panel; 1022. electromagnet; 1023. steering ring; 1024. placement slot; 1025. electromagnetic coil; 1026. limit stop ring; 103. steering slot; 104. hinged rod; 105. steering motor; 111. middle plate; 112. erection bar; 113. display panel; 114. brake switch; 121. bottom plate; 122. drop; 2. connection seat; 3. Recovery bin; 4. Conveying mechanism; 5. Vacuum tube; 6. Pipeline connection mechanism; 61. Steering tube; 62. Adjusting tube; 621. Tube body; 622. Connecting ring; 623. Limiting column; 624. Sensor; 625. Slot; 627. Threaded layer; 7. Converging side plate; 8. Partition plate; 9. Unloading mechanism; 91. Transmission shaft; 92. Triangular prism; 93. Concave surface; 94. Outward wings; 10. Unloading port; 11. Rubber brush strip; 12. Catheter; 13. Magnetic ring. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the present invention, the device of the present invention will be described more fully below with reference to the relevant drawings. Embodiments of the device are given in the drawings. However, the device can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Example

[0036] like Figure 1-2 As shown, this embodiment provides a paper cup conveying device of a paper cup forming machine, including a plurality of vacuum tubes 5 for conveying formed paper cups and a conveying device for collecting stacked formed paper cups. The vacuum tubes 5 are made of the same material as traditional vacuum pipes and are fixed to the ceiling of a workshop or a fixed frame by a positioning clip. The details are not repeated here. Each vacuum tube 5 is connected to the conveying device through a pipe connecting mechanism 6. The pipe connecting mechanism 6 includes a steering tube 61 (i.e., a U-shaped bending tube) for connecting at a bend and an adjusting tube 62 for connecting to the conveying device.

[0037] like Figure 3 As shown, the adjusting tube 62 includes a tube body 621 and a connecting ring 622. The connecting ring 622 is threadedly connected to the thread at the bottom of the inner circle of the tube body 621 through a thread layer 627 provided on the outer circle. Its function is that it can not only play the function of active connection, but also can be achieved by rotating when the direction of the vacuum tube 5 connected at the top needs to be adjusted according to the reconstruction of the workshop. It should be noted that although the height difference formed by rotating the thread 360° is very small, in order to be more precise, a rubber pad can be added between the thread layer 627 and the tube body 621 to adapt the height difference through the rebound and compression of the rubber. The bottom end of the connecting ring 622 is installed with four equidistant circular array distributed limiting posts 623 (same as the traditional paper cup conveying structure, so that the formed paper cup passes through the channel formed between the limiting posts 623, which has a good limiting effect);

[0038] A slot 625 adapted to the magnetic ring 13 is provided at the top of the tube body 621, and an annular magnet layer is embedded inside the slot 625. At the same time, the cross section of the connecting end of the vacuum tube 5 is embedded with the magnetic ring 13. The annular magnet layer and the magnetic ring 13 have opposite magnetic poles. When the pipelines are spliced, the two pipelines are easily connected by magnetic adsorption. The inner wall of the tube body 621 is embedded with a sensor 624 for detecting the number of formed paper cups passing through. The sensor 624 is a traditional photoelectric sensor that works by using the light beam between the transmitter and the receiver. When the formed paper cup passes through the sensor, it will block the light beam, thereby triggering the counting. It should be noted that the sensor 624 should be on the inner wall of the tube body 621 to prevent it from protruding and contacting the paper cup, causing the posture of the paper cup to change, resulting in transmission blockage.

[0039] The conveying device includes a retention mechanism 1, a connection seat 2 and a recovery bin 3 connected in sequence from top to bottom. The retention mechanism 1 includes a measuring mechanism 102 for weighing, verifying and conveying the stacked formed paper cups after conveying by the vacuum tube 5. The retention mechanism 1 includes a top plate 101, a middle plate 111 and a bottom plate 121 connected in sequence from top to bottom. The top of the top plate 101 is provided with a plurality of steering grooves 103 corresponding to the conduits 12 respectively. The interior of each steering groove 103 is hinged to the measuring mechanism 102 through a hinge rod 104. The hinge rod 104 is driven by a steering motor 105 installed at the bottom of the top plate 101.

[0040] The inner wall of the middle plate 111 is fixed with a mounting bar 112 for supporting the top plate 101, and the front of the middle plate 111 is installed with a plurality of display panels 113 corresponding to the steering slots 103 and a brake switch 114 for controlling the steering motor 105 (the steering motor 105 is a power-off holding type motor, that is, it has the function of automatic resetting, and its operating angle can be set to 90°, so that it controls the measuring mechanism 102 to hinge downward to complete the unloading operation). The display panel 113 digitally displays the information detected and output by the sensor 624, and the brake switch 114 includes a manual button and a counting controller. The manual button is convenient for the staff to manually press to stop the operation of the steering motor 105 here, and the counting controller is based on the preset number value and corresponds to the sensor at the same time. The counting controller automatically controls the steering motor 105 to operate after the value calculated by the sensor 624 and the measuring mechanism 102. For example, if the preset number of the counting controller is 10, the number detected by the sensor 624 is 10, and the value calculated by the measuring mechanism 102 is 10 (counting is performed by the set weight threshold), the counting controller automatically controls the steering motor 105 to operate. If the number detected by the sensor 624 is 10 and the value calculated by the measuring mechanism 102 is 9, the counting controller does not drive the steering motor 105 and issues an early warning at the same time. The early warning can be sent to the main control console through the flashing of the built-in LED bulb of the manual button, the broadcasting of the built-in speaker, and the built-in wireless transceiver module, etc., in order to remind the staff to identify the formed paper cups stacked here, among which there may be broken paper cups that do not meet the standards;

[0041] like Figure 4As shown, the measuring mechanism 102 includes a weighing panel 1021 and a steering ring 1023. The steering ring 1023 is fixed to the hinge rod 104 through a hinge seat at the rear end. The weighing panel 1021 is installed in a placement groove 1024 opened inside the steering ring 1023. An electromagnetic coil 1025 is installed at the bottom end of the inner ring of the placement groove 1024. An annular electromagnet 1022 adapted to the electromagnetic coil 1025 is inlaid at the bottom end of the placement groove 1024. A limit stop ring 1022 for limiting the position of the weighing panel 1021 is fixed at the top of the placement groove 1024. 026, its working principle is: the electromagnetic coil 1025 is used to quickly change the direction of the current, so that the electromagnet 1022 at the top is rhythmically shaken up and down, thereby shaking the formed paper cups stacked on the top, and shaking the formed paper cups with gaps or uneven stacks to make them neat, which is convenient for the neatness and stability of subsequent transportation. It should be noted that when the brake switch 114 controls the rotation motor 105 to work, the power supply of the electromagnetic coil 1025 is synchronously controlled to be disconnected (this can be achieved by receiving the electrical signal of the brake switch 114 through the installed controller);

[0042] The bottom plate 121 is fixed to the bottom of the middle plate 111 and is provided with a plurality of drop openings 122 corresponding to the turning grooves 103 , so as to facilitate the passage of the stacked formed paper cups meeting the standards that fall from the turning grooves 103 .

[0043] The connection seat 2 is provided with a conduit 12 for conveying the formed paper cups conveyed by the measuring mechanism 102. It should be noted that, Figure 8-9 As shown, the conduit 12 can be in a straight cylindrical shape or a round shape, with a notch on the front for easy observation, and the tube body is arc-shaped, and the stacked formed paper cups falling from the top of the edge slide to the corresponding unloading mechanism 9.

[0044] like Figure 5 As shown, a feeding mechanism 9 for recovering the formed paper cups transported by the conduit 12 is installed on the top of the recovery bin 3, and a plurality of feeding ports 10 for each feeding mechanism 9 to rotate are provided on the upper surface of the recovery bin 3. Each feeding mechanism 9 receives the stacked formed paper cups in correspondence with the conduit 12 corresponding to the top. Each feeding mechanism 9 is installed inside the recovery bin 3, and the stacked formed paper cups received at the top are transported downward by rotation, that is, transported to the conveying mechanism 4. A rubber brush strip 11 for filling the gap between the feeding port 10 and the feeding mechanism 9 is fixed on the inner wall of each feeding port 10, and its function is to fill the gap to prevent the paper cups from being stuck there, while not affecting the normal rotation of the feeding mechanism 9.

[0045] like Figure 6As shown, each unloading mechanism 9 includes a transmission shaft 91, and the front and rear ends of the transmission shaft 91 are respectively connected to the bearings embedded in the inner wall of the recycling bin 3, and the rear end of the transmission shaft 91 passes through the back of the recycling bin 3 and is connected to a driving mechanism, which can be a DC brushless motor, and the stacked formed paper cups received by the unloading mechanism 9 are dropped by rotating. It should be noted that the rotation cycle of the DC brushless motor is 120° once, and it is driven by an external timing control switch. The timing control switch here is respectively connected to the brake switch 114 corresponding to the top, and the timing trigger time can be set (in this embodiment, the timing control position 3S is used, that is, after the brake switch 114 controls the steering motor 105 to work, the electrical signal is transmitted to the timing control switch, and after 3S, the timing control switch controls the DC brushless motor to rotate);

[0046] A triangular prism 92 is fixed to the outer ring of the transmission shaft 91. The three faces of the triangular prism 92 are all concave surfaces 93 for placing stacked formed paper cups. The three edges of the triangular prism 92 are all fixed with an outward-spreading wing 94 that is adapted to the concave surface 93. It should also be noted that the stagnant state of the unloading mechanism 9 is that the two outward-spreading wings 94 are approximately parallel to the unloading port 10, that is, the two outward-spreading wings 94 are respectively in contact with the rubber brush strips 11 on both sides to ensure stable receiving operation.

[0047] A conveying mechanism 4 for conveying the formed paper cups transmitted by the unloading mechanism 9 is installed inside the recycling bin 3. A partition 8 is fixed to the inner wall of the recycling bin 3. A conveying channel for the conveying mechanism 4 to pass through is opened in the middle of the partition 8. The conveying mechanism 4 is a belt conveyor. The conveying belt of the belt conveyor and the conveying channel are on the same horizontal plane. The right side and bottom surface of the recycling bin 3 are respectively provided with a through hole I and a through hole II for the conveying belt to pass through. The surface of the belt should be provided with textures to increase the friction between the belt and the paper cups.

[0048] like Figure 7 As shown, the inner wall of the recovery bin 3 is movably connected with a set of gathering side panels 7 (the angle can be adjusted according to different stacking quantity requirements by means of an adjusting pin hinge, and the outer leakage end of the gathering side panels 7 is made of rubber material to prevent the lack of deformation ability from affecting the passage of the formed paper cups). The right ends of the two gathering side panels 7 are respectively in contact with the inner wall of the through-port I, and one side of the through-port I is gathered into a narrow opening by the through-port I. The purpose is that when the formed paper cups that have become loosely stacked during the falling process are conveyed through here, they are gradually integrated and aligned. When the quantity is consistent, the length formed should also be certain, which is convenient for subsequent observation by the staff.

[0049] It should be noted that the structure described in the present invention can be implemented in a variety of different forms and is not limited to the described embodiments. Any equivalent transformations made by ordinary technicians in this field using the contents of the present invention description and drawings, or directly or indirectly applied to other related technical fields, such as the loading and unloading of other items, are included in the protection scope of the present invention.

Claims

1. A paper cup conveying device for a paper cup forming machine, comprising a plurality of vacuum tubes for conveying formed paper cups and a conveying device for collecting stacked formed paper cups, characterized in that: Each of the vacuum tubes is connected to the conveying device through a pipeline connection mechanism, and the pipeline connection mechanism includes a steering tube for connecting at the bend and an adjustment tube for connecting with the conveying device, and a sensor for measuring the number of stored formed paper cups is installed at the adjustment tube; The conveying device includes a retention mechanism, a connecting seat and a recovery bin which are sequentially connected from top to bottom. The retention mechanism includes a measuring mechanism which weighs, verifies and conveys the stacked formed paper cups after being conveyed by the vacuum tube. A conduit for conveying the formed paper cups conveyed by the measuring mechanism is installed at the connecting seat. A discharge mechanism for recovering the formed paper cups conveyed by the conduit is installed on the top of the recovery bin. A conveying mechanism for conveying the formed paper cups conveyed by the discharge mechanism is installed inside the recovery bin.

2. A paper cup conveying device for a paper cup forming machine as claimed in claim 1, characterized in that: The cross sections of the vacuum tube connection ends are inlaid with magnetic rings; The regulating tube comprises a tube body and a connecting ring, wherein the connecting ring is threadedly connected to the threads at the bottom of the inner ring of the tube body through a threaded layer provided on the outer ring, and four limiting columns distributed in an equidistant annular array are installed at the bottom of the connecting ring; A slot adapted to the magnetic ring is provided on the top of the tube body, an annular magnet layer is embedded in the slot, and a sensor for detecting the number of formed paper cups passing through is embedded in the inner wall of the tube body.

3. A paper cup conveying device for a paper cup forming machine as claimed in claim 2, characterized in that: The retention mechanism comprises a top plate, a middle plate and a bottom plate connected in sequence from top to bottom, a plurality of steering grooves corresponding to the conduits are opened on the top of the top plate, the interior of each steering groove is hinged to the measuring mechanism through a hinged rod, and the hinged rod is driven by a steering motor installed at the bottom of the top plate; The inner wall of the middle plate is fixed with a mounting bar for supporting the top plate, and the front of the middle plate is installed with a plurality of display panels corresponding to the steering slots and a brake switch for controlling the steering motor; The bottom plate is fixed to the bottom of the middle plate and is provided with a plurality of drop openings respectively corresponding to the turning grooves.

4. A paper cup conveying device for a paper cup forming machine as claimed in claim 1, characterized in that: The measuring mechanism includes a weighing panel and a steering ring. The steering ring is fixed to the hinged rod through a hinged seat at the rear end. The weighing panel is installed in a placement groove opened inside the steering ring. An electromagnetic coil is installed at the bottom end of the inner ring of the placement groove. An annular electromagnet adapted to the electromagnetic coil is inlaid at the bottom end of the placement groove. A limit stop ring for limiting the weighing panel is fixed at the top of the placement groove.

5. The paper cup conveying device of the paper cup forming machine according to claim 1, characterized in that: Each of the unloading mechanisms corresponds to the corresponding conduit at the top, and each unloading mechanism is installed inside the recovery bin. The upper surface of the recovery bin is provided with a plurality of unloading ports for each unloading mechanism to rotate, and the inner wall of each unloading port is fixed with a rubber brush strip for filling the gap between the unloading mechanism and the unloading mechanism.

6. A paper cup conveying device for a paper cup forming machine as claimed in claim 5, characterized in that: Each of the unloading mechanisms includes a transmission shaft, the front and rear ends of the transmission shaft are respectively connected to bearings embedded in the inner wall of the recovery bin, and the rear end of the transmission shaft passes through the back of the recovery bin and is connected to the driving mechanism. A triangular prism is fixed to the outer ring of the transmission shaft, and the three faces of the triangular prism are all concave surfaces for placing stacked formed paper cups, and the three edges of the triangular prism are fixed with an outward wing adapted to the concave surface.

7. A paper cup conveying device for a paper cup forming machine as claimed in claim 1, characterized in that: A partition is fixed on the inner wall of the recovery bin, a conveying channel for a conveying mechanism to pass through is opened in the middle of the partition, the conveying mechanism is a belt conveyor, the conveying belt of the belt conveyor and the conveying channel are on the same horizontal plane, and a through opening I and a through opening II for the conveying belt to pass through are respectively opened on the right side and bottom surface of the recovery bin; The inner wall of the recovery bin is movably connected with a set of converging side panels, the right ends of the two converging side panels are respectively in contact with the inner wall of the through opening I, and one side of the through opening I is converging into a narrow opening by the through opening I.

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