A cassette stacking system

Abstract

This invention belongs to the technical field of small box stacking devices and discloses a small box stacking system. The system includes a ring-shaped guide rail conveying device with a pallet outlet corresponding to the pallet inlet of the ring-shaped guide rail. A three- or four-box stacking device is installed on one side of the ring-shaped guide rail, and has a first small box inlet, a second small box inlet, and a small box outlet. A single-box pushing device has a small box outlet corresponding to the small box inlet of the three- or four-box stacking device. A two- or five-box stacking device is installed on the other side of the ring-shaped guide rail. This invention uses a pallet conveying device to push pallets onto the ring-shaped guide rail, utilizes the three- or four-box stacking device to achieve three- or four-box stacking, and utilizes the two- or five-box stacking device to achieve two- or five-box stacking. The boxes are then pushed onto the ring-shaped guide rail, which then sequentially conveys the small boxes to the output assembly, achieving two different stacking methods and placing the boxes on the pallet pad for easy packaging and improved automation efficiency.

Description

Technical Field

[0001] This invention belongs to the technical field of small box stacking devices, and specifically relates to a small box stacking system. Background Technology

[0002] In the daily packaging of small boxes (such as cigarette packs), the small boxes need to be stacked before the wrapping strip is applied. Currently, most factories still use manual stacking and wrapping for small boxes. The market lacks a way to place the small boxes on a pallet before wrapping to facilitate packaging and cannot meet the needs of two different stacking methods, resulting in low automation efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a small box stacking system to solve the above-mentioned problems existing in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A small box stacking system includes a ring rail conveyor, a two-five stacking device, a pallet conveyor, an output assembly, a single box pusher, a three-four stacking device, and a machine body. The ring rail conveyor, the pallet conveyor, the single box pusher, and the three-four stacking device are all mounted on the machine body.

[0006] The circular guide rail conveying device includes a circular guide rail driven by a drive chain. The two ends of the circular guide rail are respectively provided with a tray pad inlet and an output outlet. The middle of the circular guide rail is provided with a three- or four-stack small box inlet and a two- or five-stack small box inlet. The output assembly is installed at the output outlet of the circular guide rail conveying device to push the small boxes conveyed to the output outlet to the next process.

[0007] The pallet conveying device is provided with a conveying device inlet and a conveying device outlet, and the conveying device outlet of the pallet conveying device is correspondingly set with the pallet pad inlet of the annular guide rail, so as to push the pallet pad onto the annular guide rail through the pallet conveying device.

[0008] The three-to-four stacking device is installed on one side of the ring guide rail. The three-to-four stacking device is provided with a first small box inlet, a second small box inlet and a small box outlet. It is used to stack the small boxes that enter into it from the first small box inlet and the second small box inlet respectively, and push the stacked small boxes from its small box outlet to the tray pad at the small box inlet of the three-to-four stacking device.

[0009] The single-box pushing device is installed on one side of the circular guide rail. The single-box pushing device is provided with a small box outlet, and the small box outlet of the single-box pushing device is corresponding to the first small box inlet of the three-four stacking device, so as to push the small boxes transported in from the outside to the three-four stacking device for three-four stacking.

[0010] The two-to-five stacking device is installed on the other side of the annular guide rail, and is used to push the small boxes onto the tray pad at the entrance of the two-to-five stacked small boxes after stacking them in two-to-five.

[0011] As a preferred technical solution of the present invention, it further includes a pallet lateral pushing device and a pallet pushing device, wherein the pallet lateral pushing device is installed on the body of the pallet conveying device on one side; the pallet lateral pushing device is provided with a pushing device inlet and a pushing device outlet, and the pushing device outlet of the pallet lateral pushing device is correspondingly provided with the conveying device inlet of the pallet conveying device, so as to push the pallet pad into the pallet conveying device through the pallet lateral pushing device; the pallet pushing device includes a pallet pad storage box and a pallet pad belt conveyor installed on one side of the pallet pad storage box, wherein the output port of the pallet pad belt conveyor is correspondingly provided with the pushing device inlet of the pallet lateral pushing device, so as to convey the pallet pad stored in the pallet pad storage box into the pallet lateral pushing device through the pallet pad belt conveyor.

[0012] As a preferred technical solution of the present invention, the pallet lateral pushing device includes a lateral support, a lateral push plate, a lateral back plate, and a lateral drive mechanism. The lateral support is installed on the machine body; the pallet pad belt conveyor is installed on the side of the lateral support away from the annular guide rail; the lateral back plate is vertically arranged and installed on the other side of the lateral support; the pushing device outlet of the pallet lateral pushing device is located at one end of the lateral support; the pushing device inlet of the pallet lateral pushing device is located in the middle of the lateral support; and the lateral push plate is located at the other end of the lateral support. The lateral drive mechanism is installed on the lateral back plate and is connected to the lateral push plate for transmission, so as to drive the lateral push plate to reciprocate along both ends of the lateral support and push the pallet pad conveyed to the middle of the lateral support into the pallet conveying device.

[0013] As a preferred technical solution of the present invention, the pallet conveying device includes a conveying support mounted on the machine body. A material unloading chamber is installed on the top surface of the conveying support near the end of the annular guide rail. The inner bottom surface of the material unloading chamber is provided with a material unloading station for placing pallet pads. The end of the material unloading chamber near the annular guide rail is the conveying device outlet of the pallet conveying device. A linear push plate mechanism is installed on the conveying support at the other end of the material unloading chamber to push the pallet pads located at the material unloading station to the pallet pad inlet of the annular guide rail. A vertical feeding frame is connected to the upper end of the material unloading chamber. A vertical feeding channel is provided in the vertical feeding frame, located directly above the material unloading station. The conveying device inlet of the pallet conveying device is located on one side of the vertical feeding frame and is connected to the vertical feeding channel.

[0014] Above the unloading station is a vertical unloading channel installed on the upper part of the unloading silo, with the upper end of the vertical unloading channel corresponding to the lower end of the vertical loading channel; both sides of the vertical loading frame are provided with receiving and placing mechanisms installed on the upper part of the unloading silo. The receiving and placing mechanism includes a receiving and placing plate drive cylinder, a swing arm, a receiving and placing plate connecting shaft and an L-shaped receiving and placing plate. One end of each of the two L-shaped receiving and placing plates extends between the vertical loading channel and the vertical loading frame, so as to catch the pallet pad falling in the vertical loading channel through one end of the two L-shaped receiving and placing plates. The receiving plate connecting shaft is rotatably connected to the upper end of the unloading hopper, and the receiving plate connecting shaft is connected to the other end of the L-shaped receiving plate. The rotation of the receiving plate connecting shaft drives the two L-shaped receiving plates to rotate, so that the pallet pads caught by the two L-shaped receiving plates can fall into the vertical loading frame. The telescopic rod of the receiving plate drive cylinder is rotatably connected to one end of the swing arm, and the other end of the swing arm is fixedly connected to the receiving plate connecting shaft. The swing arm is controlled by the receiving plate drive cylinder to drive the receiving plate connecting shaft to rotate.

[0015] As a preferred technical solution of the present invention, a pallet pad baffle is installed between the vertical feeding frame and the unloading station. A discharge gap is provided between the pallet pad baffle and the inner bottom surface of the unloading hopper to facilitate the sliding of a pallet pad from the unloading station to the annular guide rail. The unloading station is provided with pallet pad baffles on both sides near the annular guide rail, and vertical support rods are installed at both ends of the pallet pad baffles on both sides of the unloading station. The linear push plate mechanism can pass through the two vertical support rods and push the pallet pad on the unloading station. A horizontal support plate is provided in the conveying support below the unloading station. The lower ends of all the vertical support rods are fixedly connected to the horizontal support plate, and each vertical support rod is slidably connected between the unloading hopper and the conveying support in the vertical direction.

[0016] A support plate lifting shaft is provided below the horizontal support plate, and both ends of the support plate lifting shaft are connected to the horizontal support plate through lifting seats. A first pull plate is slidably connected to the conveying support below the horizontal support plate. The first pull plate has an inclined lifting shaft height adjustment hole, and the middle part of the support plate lifting shaft is slidably connected in the lifting shaft height adjustment hole. A pull plate driving cylinder is also installed on the conveying support. The extension rod of the pull plate driving cylinder is connected to the first pull plate, so as to drive the first pull plate to slide on the conveying support through the pull plate driving cylinder, thereby causing the support plate lifting shaft to slide relative to the extension direction of the lifting shaft height adjustment hole.

[0017] As a preferred technical solution of the present invention, the annular guide rail conveying device further includes pallet pad limiting plates installed on both sides of the annular guide rail. The two pallet pad limiting plates are located between the pallet pad inlet and the outlet of the annular guide rail. The pallet pad limiting plate corresponding to the three- or four-stacked small box inlet has a first clearance opening in the middle, which facilitates the three- or four-stacked device to push the three- or four-stacked small boxes onto the pallet pad at the three- or four-stacked small box inlet through the first clearance opening. The pallet pad limiting plate corresponding to the two- or five-stacked small box inlet has a second clearance opening in the middle, which facilitates the two- or five-stacked device to push the two- or five-stacked small boxes onto the pallet pad at the two- or five-stacked small box inlet through the second clearance opening. A plurality of receiving plates for placing pallet pads are fixedly connected to the annular guide rail. Between the pallet pad inlet and the outlet, the receiving plates move between the two pallet pad limiting plates. A plurality of clamping devices are installed on the two pallet pad limiting plates between the outlet and the three- or four-stacked small box inlet or the two- or five-stacked small box inlet to prevent the small boxes conveyed on the annular guide rail from jumping.

[0018] As a preferred technical solution of the present invention, the single-box pushing device includes a single-box pushing base plate, a single-box pushing cylinder, and a single-box pushing plate. The single-box pushing base plate is fixed to the machine body, with the small box outlet of the single-box pushing base plate located at one end. The single-box pushing cylinder is installed at the other end of the single-box pushing base plate, and the telescopic rod of the single-box pushing cylinder is connected to the single-box pushing plate to control the single-box pushing plate to push the small box located at the small box outlet to the first small box inlet of the three-four stacking device. A first small box triggering sensor is installed at the small box outlet of the single-box pushing base plate on one side of the single-box pushing base plate, and a small box inlet is provided on the other side of the single-box pushing base plate corresponding to the first small box triggering sensor.

[0019] As a preferred embodiment of the present invention, the three-to-four stacking device includes a three-to-four stacking platform. One end of the three-to-four stacking platform is connected to a single-box pushing device and is provided with a first small box inlet for the three-to-four stacking device. The top surface of the three-to-four stacking platform has a recessed groove at one end. The structure is shaped like a box, and the depth of the sinking groove is the same as the thickness of a small box. The outlet of the small box of the three-four stacking device is located on the side of the three-four stacking platform near the annular guide rail. A three-four stacking push cylinder is installed on the other side of the three-four stacking platform. A three-four stacking push plate is connected to the telescopic rod of the three-four stacking push cylinder, and the lower end of the three-four stacking push plate is in contact with the top surface of the three-four stacking platform. Shape structure;

[0020] The other end of the three-four stacking platform is connected to a three-three stacking base. A three-three stacking channel is provided in the middle of the three-three stacking base. A lifting cylinder connected to the three-three stacking base is located below the three-three stacking channel. A three-three stacking lifting plate, serving as a small box receiving plate, is connected to the extension rod of the lifting cylinder. A second small box inlet for the three-four stacking device is provided at the end of the three-three stacking base away from the three-four stacking platform, allowing small boxes to slide from the second small box inlet onto the three-three stacking lifting plate within the three-three stacking channel. The three-three stacking channel has two sides... Each is equipped with a backflow prevention support assembly located above the 3x3 stacking lifting plate, so that each layer of small boxes stacked on the 3x3 stacking lifting plate can be lifted onto the backflow prevention support assembly by the lifting cylinder, and the 3x3 stacking can be completed on the backflow prevention support assembly; a 3x3 stacking push cylinder is installed between the 3x4 stacking platform and the 3x3 stacking base, and a 3x3 stacking push plate is connected to the telescopic rod of the 3x3 stacking push cylinder, so as to control the 3x3 stacking push plate to push the small boxes stacked on the backflow prevention support assembly onto the 3x4 stacking platform through the 3x3 stacking push cylinder;

[0021] The anti-return support assembly includes an anti-return support plate and a return spring. Support plate clearance slots are provided on both sides of the 3x3 stacking bases of the 3x3 stacking channel. Each support plate clearance slot contains an anti-return support plate. The sides of the two anti-return support plates closest to each other extend into the 3x3 stacking channel, and in their natural state, the distance between the two anti-return support plates is less than the width of the small box. The other sides of the two anti-return support plates pass through the support plate clearance slots and connect to the upper end of the return spring. The lower end of the return spring connects to the 3x3 stacking base. The bottom surface of one side of each anti-return support plate is a guide slope that facilitates the small box pushing the anti-return support plate to both sides of the 3x3 stacking base.

[0022] As a preferred technical solution of the present invention, the two-five stacking device includes a two-five stacking support, on which a first small box belt conveyor is installed. A box feeder is installed at the input end of the first small box belt conveyor to facilitate the sequential stacking of small boxes from top to bottom within the box feeder, and to allow the small boxes at the bottom of the box feeder to fall sequentially to the input end of the first small box belt conveyor. A single-five stacking base plate is provided at the output end of the first small box belt conveyor. A single-five box pushing cylinder and a second small box belt conveyor are respectively provided on both sides of the single-five stacking base plate. The upper end of the second small box belt conveyor is horizontally lower than the upper end of the single-five stacking base plate, so as to push the two layers of small boxes back and forth onto the second small box belt conveyor for stacking via the single-five box pushing cylinder. A two-five box pushing cylinder is installed on one side of the output end of the second small box belt conveyor, and the other side of the second small box belt conveyor opposite to the two-five box pushing cylinder is a two-five stacking small box inlet with an annular guide rail.

[0023] As a preferred technical solution of the present invention, the output assembly device includes an output assembly base, a support panel is installed on the upper end of the output assembly base, one end of the support panel is correspondingly set with the output outlet of the annular guide rail, so as to transport the small box at the output outlet to one end of the support panel through the annular guide rail; both sides of the support panel are vertically connected to mounting plates, and a pushing channel is provided in the middle of the support panel. The pushing channel vertically passes through the two mounting plates, and a motor-controlled conveyor belt is installed on the upper part of the two mounting plates. The two conveyor belts are higher than the pushing channel in the horizontal direction, and multiple small box scrapers are evenly installed between the two conveyor belts, so as to drive the small box scrapers to move through the two conveyor belts and scrape the small box located at one end of the support panel into the pushing channel in the middle of the support panel;

[0024] One end of the feeding channel is provided with an output channel connected to the support panel. An output feeding mechanism is installed on the output assembly base at the other end of the feeding channel to push the small box located in the feeding channel to the output channel. The output feeding mechanism includes two parallel feeding tracks, and a feeding slide is slidably connected between the two feeding tracks. The upper end of the feeding slide is connected to an output feeding plate through a feeding plate seat extending towards the feeding channel. The output feeding mechanism also includes an output feeding drive mechanism for driving the feeding slide to slide between the two feeding tracks. The output feeding drive mechanism is installed on the output assembly base.

[0025] Beneficial effects: In the working process, the present invention first pushes the pallet pad onto the circular guide rail via the pallet conveyor. Then, the single box pushing device and the three-four stacking device are used to stack the small boxes into three-four stacks and push them onto the pallet pad at the entrance of the three-four stacked small boxes on the circular guide rail. The two-five stacking device is used to stack the small boxes into two-five stacks and push them onto the pallet pad at the entrance of the two-five stacked small boxes on the circular guide rail. The circular guide rail then transports the three-four stacked small boxes and the two-five stacked small boxes to the output outlet in sequence. Then, the output assembly device pushes them to the next process. This invention realizes two different stacking methods of small boxes in one system and places the small boxes on the pallet pad, which is convenient for packaging and improves automation efficiency. Attached Figure Description

[0026] Figure 1 This is a system structure diagram of the present invention;

[0027] Figure 2 This is a schematic diagram of the combination of the pallet conveying device, the pallet lateral pushing device, and the pallet pushing device in this invention;

[0028] Figure 3 This is a three-dimensional schematic diagram of the pallet conveying device in this invention;

[0029] Figure 4 This is a side view of the pallet conveying device in this invention;

[0030] Figure 5 This is a schematic diagram of the receiving and placing mechanism in the pallet conveying device.

[0031] Figure 6 This is a schematic diagram of the structure of the annular guide rail conveying device in this invention;

[0032] Figure 7 This is a schematic diagram of the combination of the single-box pushing device and the three- or four-box stacking device in this invention;

[0033] Figure 8 This is a schematic diagram of the three- or four-stack device in this invention;

[0034] Figure 9 This is a partial structural schematic diagram of the three- or four-stack device in this invention;

[0035] Figure 10 This is a schematic diagram of the structure of the two-five stacking device in this invention;

[0036] Figure 11 This is a schematic diagram of the output assembly device in this invention.

[0037] In the diagram: 1- Circular guide rail conveyor; 101- Drive chain; 102- Circular guide rail; 103- Pallet pad inlet; 104- Output outlet; 105- Inlet for three- or four-stacked small boxes; 106- Inlet for two- or five-stacked small boxes; 107- Pallet pad limiting plate; 108- Receiving pallet; 109- Pressing device; 2- Two- or five-stacked device; 201- Two- or five-stacked support; 202- First small box belt conveyor; 203- Box feeder; 204- Single- or five-stacked bottom plate; 205- Single- or five-stacked box pusher cylinder; 206 - Second small box belt conveyor; 207- Second and fifth box pusher cylinder; 3- Pallet conveyor device; 301- Conveyor support; 302- Unloading bin; 303- Vertical loading frame; 304- Vertical unloading channel; 305- Receiving plate drive cylinder; 306- Swing arm; 307- Receiving plate connecting shaft; 308- L-shaped receiving plate; 309- Pallet pad baffle; 310- Vertical support rod; 312- Horizontal; 313- Lifting seat; 314- First pulling plate; 315- Pulling plate drive cylinder; 4- Pallet lateral push. Device; 401-Transverse support; 402-Transverse push plate; 403-Transverse back plate; 404-Transverse drive mechanism; 5-Plate pushing device; 501-Plate pad belt conveyor; 6-Output assembly; 601-Output assembly base; 602-Support panel; 603-Mounting plate; 604-Conveyor belt; 605-Small box scraper; 606-Output channel; 607-Pushing track; 608-Pushing slide; 609-Push plate seat; 610-Output pushing plate; 7-Single box pushing device; 701 - Single box push base plate; 702 Single box push cylinder; 703 Single box push plate; 704 First small box trigger sensing device; 8 Three-four stacking device; 801 Three-four stacking platform; 802 Sinking groove; 803 Three-four stacking push cylinder; 804 Three-four stacking push plate; 805 Three-three stacking base; 806 Lifting cylinder; 807 Three-three stacking lifting plate; 808 Three-three stacking pushing cylinder; 809 Three-three stacking push plate; 810 Anti-return support plate; 811 Return spring; 9 Body. Detailed Implementation

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0039] Example:

[0040] like Figures 1-11As shown, this embodiment provides a small box stacking system, including a ring rail conveying device 1, a two-five stacking device 2, a pallet conveying device 3, an output assembly device 6, a single box pushing device 7, a three-four stacking device 8, and a body 9. The ring rail conveying device 1, the pallet conveying device 3, the single box pushing device 7, and the three-four stacking device 8 are all installed on the body 9. The above structures are combined to form a small box stacking system to realize the stacking and conveying of small boxes.

[0041] Specifically, the annular guide rail conveying device 1 includes an annular guide rail 102 driven by a drive chain 101. The two ends of the annular guide rail 102 are respectively provided with a tray pad inlet 103 and an output outlet 104. The middle of the annular guide rail 102 is provided with a three-to-four stacked small box inlet 105 and a two-to-five stacked small box inlet 106. Thus, the annular guide rail 102 can be used to connect the entire system to realize the input and output of small boxes. The output assembly device 6 is installed at the output outlet 104 of the annular guide rail conveying device 1 to push the small boxes conveyed to the output outlet 104 to the next process, so as to realize the docking of this small box stacking system with the next process more efficiently and ensure work efficiency.

[0042] In more detail, the pallet conveying device 3 is provided with a conveying device inlet and a conveying device outlet, and the conveying device outlet of the pallet conveying device 3 is correspondingly set with the pallet pad inlet 103 of the annular guide rail 102, so as to push the pallet pad onto the annular guide rail 102 through the pallet conveying device 3. In practice, the pallet pad is pushed to the conveying device inlet of the pallet conveying device 3, and then the pallet conveying device 3 pushes the pallet pad onto the annular guide rail 102 as needed, so that the annular guide rail 102 can connect various parts according to the rhythm and ensure work efficiency.

[0043] Furthermore, the three-to-four stacking device 8 is installed on one side of the annular guide rail 102. The three-to-four stacking device 8 is equipped with a first small box inlet, a second small box inlet, and a small box outlet. It allows small boxes entering through the first and second small box inlets to be stacked in three-to-four fashion. The cooperation of the first and second small box inlets enables three-to-four stacking, and the stacked small boxes are pushed from their outlets onto a tray pad at the three-to-four stacking small box inlet 105, improving work efficiency and facilitating the three-to-four stacked transport of small boxes. Simultaneously, the single-box pushing device 7 is installed on one side of the annular guide rail 102. The single-box pushing device 7 has a small box outlet, which corresponds to the first small box inlet of the three-to-four stacking device 8. It pushes externally transported small boxes to the three-to-four stacking device 8 for three-to-four stacking, thus achieving automatic pushing of small boxes from the first small box inlet and ensuring work efficiency.

[0044] In more detail, the two-five stacking device 2 is installed on the other side of the annular guide rail 102, and is used to stack the small boxes in two-five order and push them onto the tray pad at the two-five stacking box inlet 106, thereby realizing the stacking and pushing of the small boxes in two-five order.

[0045] In the operation of this invention, the pallet is first pushed onto the annular guide rail 102 by the pallet conveying device 3. Then, the single box pushing device 7 and the three-four stacking device 8 are used to stack the small boxes into three-four stacks and push them onto the pallet at the three-four stacked small box inlet 105 of the annular guide rail 102. The two-five stacking device 2 is used to stack the small boxes into two-five stacks and push them onto the pallet at the two-five stacked small box inlet 106 of the annular guide rail 102. The annular guide rail 102 then transports the three-four stacked small boxes and the two-five stacked small boxes to the output outlet 104 in sequence. Then, the output assembly device 6 pushes them to the next process. This invention realizes two different stacking methods of small boxes in one system and places the small boxes on the pallet, which is convenient for packaging and improves automation efficiency.

[0046] As a preferred embodiment of this invention, it should be further explained that the small box stacking system of the present invention also includes a pallet lateral pushing device 4 and a pallet pushing device 5. The pallet lateral pushing device 4 is installed on the body 9 on one side of the pallet conveying device 3 to ensure structural stability. The pallet lateral pushing device 4 is provided with a pushing device inlet and a pushing device outlet, and the pushing device outlet of the pallet lateral pushing device 4 is correspondingly set with the conveying device inlet of the pallet conveying device 3, so as to push the pallet pad into the pallet conveying device 3 through the pallet lateral pushing device 4. The pallet pushing device 5 includes a pallet pad storage box and a pallet pad belt conveyor 501 installed on one side of the pallet pad storage box. The output port of the pallet pad belt conveyor 501 is connected to the pushing device of the pallet lateral pushing device 4. The device inlet is designed to transport pallet pads stored in the pallet pad storage box to the pallet lateral pushing device 4 via the pallet pad belt conveyor 501. In practice, the operator can place the pallet pads stored in the pallet pushing device 5 onto the pallet pad belt conveyor 501. The pallet pad belt conveyor 501 transports the pallet pads to the pushing device inlet of the pallet lateral pushing device 4. A sensor can be installed at the pushing device inlet. When the sensor detects a pallet pad at the pushing device inlet, the pallet lateral pushing device 4 starts and pushes the pallet pad into the pallet conveying device 3, thus realizing the transport of the pallet pads without affecting the rhythm of the pallet conveying device 3 transporting the pallet pads to the annular guide rail 102. This ensures that the transport of the pallet pads can be perfectly coordinated with the annular guide rail 102, guaranteeing work efficiency.

[0047] As a preferred embodiment of this invention, it should be further explained that the pallet lateral pushing device 4 includes a lateral support 401, a lateral push plate 402, a lateral back plate 403, and a lateral drive mechanism 404. The lateral support 401 is mounted on the machine body 9 to ensure stability. The pallet pad belt conveyor 501 is mounted on the side of the lateral support 401 away from the annular guide rail 102, achieving a reasonable structural layout. The lateral back plate 403 is vertically arranged and mounted on the other side of the lateral support 401. The pushing device outlet of the pallet lateral pushing device 4 is located at one end of the lateral support 401, the pushing device inlet of the pallet lateral pushing device 4 is located in the middle of the lateral support 401, and the lateral push plate 402 is located at the other end of the lateral support 401, thereby facilitating... The transverse push plate 402 pushes the pallet pad in the middle of the transverse support 401 and pushes the pallet pad into the pallet conveying device 3 at the other end of the transverse support 401. The transverse drive mechanism 404 is installed on the transverse back plate 403 and is connected to the transverse push plate 402 for transmission. It is used to drive the transverse push plate 402 to move back and forth along both ends of the transverse support 401 and push the pallet pad conveyed to the middle of the transverse support 401 into the pallet conveying device 3. It should be noted that since the transverse push plate 402 makes a linear reciprocating motion, the transverse drive mechanism 404 can be an electric cylinder, an electric telescopic rod, or a gear rack controlled by a motor, etc., which can easily realize the control of the transverse push plate 402. This embodiment does not make specific limitations.

[0048] As a preferred embodiment of this invention, it should be further explained that the pallet conveying device 3 includes a conveying support 301 mounted on the machine body 9. A discharge chamber 302 is mounted on the top surface of the conveying support 301 near the annular guide rail 102. The inner bottom surface of the discharge chamber 302 is provided with a discharge station for placing pallet pads. The end of the discharge chamber 302 near the annular guide rail 102 is the conveying device outlet of the pallet conveying device 3. A linear pusher mechanism is mounted on the conveying support 301 at the other end of the discharge chamber 302 to push the pallet pads located at the discharge station to the pallet pad inlet 10 of the annular guide rail 102. At point 3, the linear pusher mechanism can be a linear guide rail, electric steel rod, or electric telescopic rod connected to the pusher plate, etc., without specific restrictions; the upper end of the unloading chamber 302 is connected to a vertical feeding frame 303, and a vertical feeding channel is set inside the vertical feeding frame 303 located directly above the unloading station. The inlet of the pallet conveying device 3 is located on one side of the vertical feeding frame 303 and is connected to the vertical feeding channel, so that pallet pads can be conveyed into the vertical feeding frame 303 through the inlet of the conveying device, thereby allowing the pallet pads to be stacked one by one. In this way, the pallet pads can be pushed onto the annular guide rail 102 one by one according to the setting of the pallet conveying device 3.

[0049] More specifically, a vertical unloading channel 304 is installed above the unloading station and mounted on the upper part of the unloading silo 302. The upper end of the vertical unloading channel 304 corresponds to the lower end of the vertical loading channel, which can restrain the pallet pad during its descent, thus ensuring a stable descent onto the unloading station. Both sides of the vertical loading frame 303 are equipped with receiving and placing mechanisms installed on the upper part of the unloading silo 302. These receiving and placing mechanisms include a receiving and placing plate drive cylinder 305, a swing arm 306, a receiving and placing plate connecting shaft 307, and L-shaped receiving and placing plates 308. One of the two L-shaped receiving and placing plates 308... Both ends extend to the space between the vertical feeding channel and the vertical feeding frame 303, used to catch the pallet pads falling from the vertical feeding channel through one end of the two L-shaped receiving plates 308. The L-shaped receiving plates 308 then buffer the pallet pads falling directly from the vertical feeding channel 304 between the vertical feeding channel and the vertical unloading channel 304, preventing damage to the equipment. The receiving plate connecting shaft 307 is rotatably connected to the upper end of the unloading hopper 302, and the receiving plate connecting shaft 307 is connected to the other end of the L-shaped receiving plate 308, used to connect the receiving plate... The rotation of the connecting shaft 307 drives the two L-shaped receiving plates 308 to rotate, thereby allowing the pallet pads caught by the two L-shaped receiving plates 308 to fall into the vertical feeding frame 303. The telescopic rod of the receiving plate drive cylinder 305 is rotatably connected to one end of the swing arm 306, and the other end of the swing arm 306 is fixedly connected to the receiving plate connecting shaft 307. This allows the receiving plate drive cylinder 305 to control the swing arm 306 to swing, thereby driving the receiving plate connecting shaft 307 to rotate. In practice, the receiving plate drive cylinder 305 controls the telescopic rod to extend and retract, thus enabling the swing arm 306 to rotate. The reciprocating swing of the swing arm 306 can drive the receiving plate connecting shaft 307 to rotate intermittently forward and backward, thereby driving the two L-shaped receiving plates 308 to move closer or further away from each other. When the two L-shaped receiving plates 308 are close to each other, they can prevent the pallet pad in the vertical feeding frame 303 from falling directly into the vertical unloading channel 304. When the two L-shaped receiving plates 308 are far apart from each other, they can control the pallet pad in the vertical feeding frame 303 to fall into the vertical unloading channel 304, ensuring the stability of the pallet pad's descent.

[0050] As a preferred embodiment of this invention, it should be further explained that a pallet baffle 309 is installed between the vertical feeding frame 303 and the unloading station. A discharge gap is provided between the pallet baffle 309 and the inner bottom surface of the unloading chamber 302 to facilitate the sliding of a pallet from the unloading station to the annular guide rail 102. Through the obstruction of the pallet baffle 309 and the cooperation of the linear pusher mechanism, one pallet can be pushed onto the annular guide rail 102 each time, thus achieving precise control of pallet feeding. Pallet baffles 309 are provided on both the side of the unloading station closest to the annular guide rail 102 and the other side, ensuring that the pallet can stably land at the unloading station and that the unloading process is efficient. Vertical support rods 310 are installed at both ends of the pallet pad baffles 309 on both sides of the workstation, and the linear push plate mechanism can pass between the two vertical support rods 310 and push the pallet pad on the unloading workstation to ensure smooth material pushing; a horizontal support plate 311 is provided in the conveyor support 301 below the unloading workstation, and the lower ends of all the vertical support rods 310 are fixedly connected to the horizontal support plate 311, and each vertical support rod 310 is slidably connected between the unloading chamber 302 and the conveyor support 301 in the vertical direction. Thus, by raising and lowering the horizontal support plate 311, the position of all the pallet pad baffles 309 can be adjusted, and the height of the pallet pad baffles 309 can be finely adjusted according to the actual situation to improve practicality.

[0051] More specifically, a support plate lifting shaft 312 is provided below the horizontal support plate 311. Both ends of the support plate lifting shaft 312 are connected to the horizontal support plate 311 via lifting seats 313, allowing the support plate lifting shaft 312 to move synchronously with the horizontal support plate 311. A first pull plate 314 is slidably connected to the conveying support 301 below the horizontal support plate 311. The first pull plate 314 has an inclined lifting shaft height adjustment hole. The middle part of the support plate lifting shaft 312 is slidably connected within the lifting shaft height adjustment hole, so that the lifting shaft 312 can be adjusted by changing the position of the lifting shaft height adjustment hole. The lifting of 12, in turn, drives the pallet pad baffle 309 to lift; the conveying support 301 is also equipped with a pull plate drive cylinder 315, the extension rod of the pull plate drive cylinder 315 is connected to the first pull plate 314, so as to drive the first pull plate 314 to slide on the conveying support 301 through the pull plate drive cylinder 315, thereby causing the support plate lifting shaft 312 to slide relative to the extension direction of the lifting shaft height adjustment hole. The sliding of the first pull plate 314 causes the support plate lifting shaft 312 to move within the lifting shaft height adjustment hole. Since the lifting shaft height adjustment hole is an inclined elongated hole, the height of the support plate lifting shaft 312 can be adjusted.

[0052] As a preferred embodiment of this invention, it should be further explained that the annular guide rail conveying device 1 also includes pallet pad limiting plates 107 installed on both sides of the annular guide rail 102. The two pallet pad limiting plates 107 are located between the pallet pad inlet 103 and the outlet 104 of the annular guide rail 102, which can limit the pallet pad on the annular guide rail 102, and also limit the small boxes on the pallet pad, making the transportation of the annular guide rail 102 more stable. In addition, the pallet pad limiting plate 107 corresponding to the three-four stacked small box inlet 105 has a first clearance opening in the middle, which facilitates the three-four stacking device 8 to push the three-four stacked small boxes through the first clearance opening onto the pallet pad at the three-four stacked small box inlet 105, and thus naturally combine with the three-four stacking device 8; the pallet pad limiting plate 107 corresponding to the two-five stacked small box inlet 106 has a second clearance opening in the middle. The clearance opening facilitates the pushing of the stacked small boxes from the 2-5 stacking device 2 onto the pallet pad at the 2-5 stacking small box inlet 106, thus naturally integrating them with the 2-5 stacking device 2. Multiple receiving plates 108 for placing the pallet pads are fixedly connected to the annular guide rail 102, making the pallet pads more stable during transport on the annular guide rail 102. Between the pallet pad inlet 103 and the outlet 104, the receiving plates 108 move between two pallet pad limiting plates 107 without affecting the transport on the annular guide rail 102. Multiple clamping devices 109 are installed on the two pallet pad limiting plates 107 between the outlet 104 and the 3-4 stacking small box inlet 105 or the 2-5 stacking small box inlet 106. These clamping devices 109 prevent the small boxes transported on the annular guide rail 102 from jumping. The clamping devices 109 can be the simplest limiting plates.

[0053] As a preferred embodiment of this invention, it should be further explained that the single-box pushing device 7 includes a single-box pushing base plate 701, a single-box pushing cylinder 702, and a single-box pushing plate 703. The single-box pushing base plate 701 is fixedly mounted on the machine body 9. The small box outlet of the single-box pushing base plate 701 is located at one end of it, and the single-box pushing cylinder 702 is mounted at the other end of the single-box pushing base plate 701. The telescopic rod of the single-box pushing cylinder 702 is connected to the single-box pushing plate 703, so as to control the single-box pushing plate 703 to push the small box located at the small box outlet to the first small box inlet of the three-four stacking device 8 through the single-box pushing cylinder 702. The structure is simple and practical. A first small box triggering sensor 704 is installed at the small box outlet of the single-box pushing base plate 701 on one side of the single-box pushing base plate 701. A small box inlet is provided on the other side of the single-box pushing base plate 701 corresponding to the first small box triggering sensor 704, which can easily realize the automatic pushing of small boxes.

[0054] As a preferred embodiment of this invention, it should be further noted that the three-to-four stacking device 8 includes a three-to-four stacking platform 801. One end of the three-to-four stacking platform 801 is connected to the single-box pushing device 7 and is provided with a first small box inlet of the three-to-four stacking device 8. The top surface of the three-to-four stacking platform 801 has a recessed groove 802 at one end. The structure is shaped such that the depth of the sinkhole 802 is the same as the thickness of a small box, allowing four layers of small boxes to be stacked on the three-to-four stacking platform 801. The top three layers each contain three small boxes, and the bottom layer of small boxes is placed within the sinkhole 802, forming a three-to-four stack of small boxes. The small box outlet of the three-to-four stacking device 8 is located on the side of the three-to-four stacking platform 801 near the annular guide rail 102. A three-to-four stacking push cylinder 803 is installed on the other side of the three-to-four stacking platform 801. A three-to-four stacking push plate 804 is connected to the telescopic rod of the three-to-four stacking push cylinder 803, and the lower end of the three-to-four stacking push plate 804 is in contact with the top surface of the three-to-four stacking platform 801. The structure allows three or four stacked small boxes to be pushed onto the annular guide rail 102.

[0055] More specifically, the other end of the three-four stacking platform 801 is connected to a three-three stacking base 805. A three-three stacking channel is provided in the middle of the three-three stacking base 805. A lifting cylinder 806 connected to the three-three stacking base 805 is provided below the three-three stacking channel to ensure the stability of the lifting cylinder 806. A three-three stacking lifting plate 807, used as a small box receiving plate, is connected to the telescopic rod of the lifting cylinder 806. Preferably, the width of the three-three stacking lifting plate 807 is smaller than the width of the small box to accommodate it. A second small box inlet of the three-four stacking device 8 is provided at the end of the three-three stacking base 805 away from the three-four stacking platform 801, so that the small box can slide from the second small box inlet onto the three-three stacking lifting plate 807 in the three-three stacking channel, thereby conveying three small boxes, or one layer of small boxes, onto the three-three stacking lifting plate 807 each time. Both sides of the channel are equipped with anti-reverse support components located above the 3x3 stacking lifting plate 807, so that each layer of small boxes stacked on the 3x3 stacking lifting plate 807 can be lifted onto the anti-reverse support component by the lifting cylinder 806, and the 3x3 stacking is completed on the anti-reverse support component. That is, the small boxes can only be stacked one layer at a time on the anti-reverse support component without falling down, which makes it convenient to stack three layers of small boxes on the anti-reverse support component in sequence. A 3x3 stacking push cylinder 808 is installed between the 3x4 stacking platform 801 and the 3x3 stacking base 805. The telescopic rod of the 3x3 stacking push cylinder 808 is connected to a 3x3 stacking push plate 809, which is used to control the 3x3 stacking push plate 809 to push the small boxes stacked on the anti-reverse support component onto the 3x4 stacking platform 801, thereby realizing the 3x4 stacking of small boxes on the 3x4 stacking platform 801.

[0056] More specifically, the anti-return support assembly includes an anti-return support plate 810 and a return spring 811. Support plate clearance slots are provided on both sides of the 3x3 stacking channel's 3x3 stacking base 805, and each support plate clearance slot contains an anti-return support plate 810. The sides of the two anti-return support plates 810 closest to each other extend into the 3x3 stacking channel. In its natural state, the distance between the two anti-return support plates 810 is less than the width of the small box. Therefore, when the lifting cylinder 806 drives the 3x3 stacking lifting plate 807 to rise, the small box on the 3x3 stacking lifting plate 807 can push open the two anti-return support plates 810. Then, after the small box is positioned above the anti-return support plates 810, the 3x3 stack... As the lifting plate 807 descends, the small box can land on the two anti-return support plates 810. The other side of each of the two anti-return support plates 810 passes through the support plate clearance groove and is connected to the upper end of the return spring 811. The lower end of the return spring 811 is connected to the triple stacking base 805. The bottom surface of one side of each of the two anti-return support plates 810 is a guide slope that facilitates the small box to push the anti-return support plates 810 to both sides of the triple stacking base 805. When the small box pushes the two anti-return support plates 810 upwards, the two anti-return support plates 810 press against the return spring 811 outwards, causing the two anti-return support plates 810 to move away from each other, so that the small box can rise above the two anti-return support plates 810.

[0057] As a preferred embodiment of this example, it should be further explained that the two-five stacking device 2 includes a two-five stacking support 201, on which a first small box belt conveyor 202 is mounted. A box feeder 203 is installed at the input end of the first small box belt conveyor 202, facilitating the sequential stacking of small boxes from top to bottom within the box feeder 203. The small boxes at the lower end of the box feeder 203 fall sequentially to the input end of the first small box belt conveyor 202, and are then sequentially conveyed to its output end by the first small box belt conveyor 202. A single-five stacking base plate 204 is provided at the output end of the first small box belt conveyor 202, allowing for the sequential arrangement of small boxes on the single-five stacking base plate 204. A single-five box pushing cylinder 205 and a second small box belt conveyor 206 are respectively provided on both sides of the single-five stacking base plate 204. The upper end of 6 is horizontally lower than the upper end of the single-five stacking base plate 204. This allows the single-five pusher cylinder 205 to push two layers of small boxes forward and backward onto the second small box belt conveyor 206 for stacking. When five small boxes are arranged in sequence on the single-five stacking base plate 204, the single-five pusher cylinder 205 can push one layer of small boxes onto the second small box belt conveyor 206, and then push the next layer to achieve the stacking of two layers of small boxes. A two-five pusher cylinder 207 is installed on one side of the output end of the second small box belt conveyor 206. The other side of the second small box belt conveyor 206 opposite to the two-five pusher cylinder 207 is the two-five stacking small box inlet 106 of the annular guide rail 102. The two-five pusher cylinder 207 is used to push the two-five stacking small boxes to the two-five stacking small box inlet 106 of the annular guide rail 102.

[0058] As a preferred embodiment of this invention, it should be further explained that the output assembly device 6 includes an output assembly base 601, and a support panel 602 is mounted on the upper end of the output assembly base 601. One end of the support panel 602 is correspondingly arranged with the output outlet 104 of the annular guide rail 102, so as to facilitate the conveying of the small box at the output outlet 104 to one end of the support panel 602 via the annular guide rail 102. Mounting plates 603 are vertically connected to both sides of the support panel 602, and a material pushing channel is provided in the middle of the support panel 602. The feeding channel vertically penetrates the two mounting plates 603. Each of the two mounting plates 603 is equipped with a motor-controlled conveyor belt 604. The two conveyor belts 604 are higher than the feeding channel in the horizontal direction. Multiple small box scrapers 605 are evenly installed between the two conveyor belts 604. The scrapers 605 are moved by the two conveyor belts 604 to scrape the small boxes located at one end of the support panel 602 into the feeding channel in the middle of the support panel 602. Then, the annular guide rail 102 transports the small boxes at one end of the support panel 602 to the designated position.

[0059] More specifically, one end of the feeding channel is provided with an output channel 606 connected to the support panel 602, facilitating the scraping of small boxes by the small box scraper 605 into the output channel 606. An output feeding mechanism is installed on the output assembly base 601 at the other end of the feeding channel, used to push the small boxes located in the feeding channel into the output channel 606, and then push the small boxes out of the output channel 606. The output feeding mechanism includes two parallel feeding tracks 607, with a feeding slide 608 slidably connected between the two feeding tracks 607. The upper end of 608 is connected to an output pusher plate 610 via a pusher plate seat 609 extending towards the pusher channel. The output pusher mechanism also includes an output pusher drive mechanism for driving the pusher slide 608 to slide between two pusher tracks 607. The output pusher drive mechanism is mounted on the output assembly base 601. In practice, the output pusher drive mechanism drives the pusher slide 608 to slide between the two pusher tracks 607, thereby causing the pusher slide 608 to move the output pusher plate 610 via the pusher plate seat 609, pushing the small box out of the pusher channel. The structure is simple and stable. It should be noted that the output pusher drive mechanism can be an electric cylinder, an electric telescopic rod, or a gear and rack structure controlled by a motor, etc., and no specific limitation is made here.

[0060] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A small box stacking system, characterized in that, It includes a ring rail conveyor (1), a two-five stacking device (2), a pallet conveyor (3), an output assembly (6), a single box pusher (7), a three-four stacking device (8), and a body (9). The ring rail conveyor (1), the pallet conveyor (3), the single box pusher (7), and the three-four stacking device (8) are all installed on the body (9). The annular guide rail conveying device (1) includes an annular guide rail (102) driven by a drive chain (101). The two ends of the annular guide rail (102) are respectively provided with a tray pad inlet (103) and an output outlet (104). The middle part of the annular guide rail (102) is provided with a three-to-four stacked small box inlet (105) and a two-to-five stacked small box inlet (106). The output assembly device (6) is installed at the output outlet (104) of the annular guide rail conveying device (1) to push the small boxes conveyed to the output outlet (104) to the next process. The pallet conveying device (3) is provided with a conveying device inlet and a conveying device outlet, and the conveying device outlet of the pallet conveying device (3) is correspondingly provided with the pallet pad inlet (103) of the annular guide rail (102) so as to push the pallet pad onto the annular guide rail (102) through the pallet conveying device (3). The three-to-four stacking device (8) is installed on one side of the annular guide rail (102). The three-to-four stacking device (8) is provided with a first small box inlet, a second small box inlet and a small box outlet. The small boxes that enter from the first small box inlet and the second small box inlet respectively are stacked in three-to-four by the three-to-four stacking device (8), and the stacked small boxes are pushed from their small box outlets to the tray pad at the three-to-four stacked small box inlet (105). The single box pushing device (7) is installed on one side of the ring guide rail (102). The single box pushing device (7) is provided with a small box outlet, and the small box outlet of the single box pushing device (7) is corresponding to the first small box inlet of the three-four stacking device (8), so as to push the small box transported from the outside to the three-four stacking device (8) for three-four stacking through the single box pushing device (7). The two-five stacking device (2) is installed on the other side of the annular guide rail (102) to push the small boxes to the tray pad at the entrance (106) of the two-five stacked small boxes after stacking them in two-five.

2. The small box stacking system according to claim 1, characterized in that, It also includes a pallet lateral pushing device (4) and a pallet pushing device (5). The pallet lateral pushing device (4) is installed on the body (9) on one side of the pallet conveying device (3). The pallet lateral pushing device (4) is provided with a pushing device inlet and a pushing device outlet. The pushing device outlet of the pallet lateral pushing device (4) is correspondingly set with the conveying device inlet of the pallet conveying device (3) so as to push the pallet pad into the pallet conveying device (3) through the pallet lateral pushing device (4). The pallet pushing device (5) includes a pallet pad storage box and a pallet pad belt conveyor (501) installed on one side of the pallet pad storage box. The output port of the pallet pad belt conveyor (501) is correspondingly set with the pushing device inlet of the pallet lateral pushing device (4) so ​​as to convey the pallet pad stored in the pallet pad storage box into the pallet lateral pushing device (4) through the pallet pad belt conveyor (501).

3. The small box stacking system according to claim 2, characterized in that, The pallet lateral pushing device (4) includes a lateral support (401), a lateral push plate (402), a lateral back plate (403), and a lateral drive mechanism (404). The lateral support (401) is mounted on the machine body (9). The pallet pad belt conveyor (501) is mounted on the side of the lateral support (401) away from the annular guide rail (102). The lateral back plate (403) is vertically arranged and mounted on the other side of the lateral support (401). The pushing device outlet of the pallet lateral pushing device (4) is located on one side of the lateral support (401). At one end, the inlet of the pallet lateral pushing device (4) is located in the middle of the lateral support (401), and the lateral push plate (402) is located at the other end of the lateral support (401); the lateral drive mechanism (404) is installed on the lateral back plate (403) and is connected to the lateral push plate (402) for transmission, so as to drive the lateral push plate (402) to move back and forth along both ends of the lateral support (401) through the lateral drive mechanism (404) and push the pallet pad conveyed to the middle of the lateral support (401) into the pallet conveying device (3).

4. A small box stacking system according to any one of claims 1-3, characterized in that, The pallet conveying device (3) includes a conveying support (301) mounted on the machine body (9). A discharge chamber (302) is installed on the top surface of the conveying support (301) near one end of the annular guide rail (102). The inner bottom surface of the discharge chamber (302) is provided with a discharge station for placing pallet pads. One end of the discharge chamber (302) near the annular guide rail (102) is the conveying outlet of the pallet conveying device (3). The other end of the discharge chamber (302) is located on the conveying support (301). A linear pusher mechanism is installed to push the pallet pad located at the unloading station to the pallet pad inlet (103) of the circular guide rail (102) via the linear pusher mechanism; the upper end of the unloading warehouse (302) is connected to a vertical feeding frame (303), and a vertical feeding channel located directly above the unloading station is provided in the vertical feeding frame (303); the conveying device inlet of the pallet conveying device (3) is located on one side of the vertical feeding frame (303) and is connected to the vertical feeding channel; Above the unloading station is a vertical unloading channel (304) installed on the upper part of the unloading silo (302), with the upper end of the vertical unloading channel (304) corresponding to the lower end of the vertical loading channel; both sides of the vertical loading frame (303) are provided with receiving and placing mechanisms installed on the upper part of the unloading silo (302), the receiving and placing mechanism includes a receiving and placing plate drive cylinder (305), a swing arm (306), a receiving and placing plate connecting shaft (307) and an L-shaped receiving and placing plate (308), one end of each of the two L-shaped receiving and placing plates (308) extends between the vertical loading channel and the vertical loading frame (303) to catch the pallet pad falling in the vertical loading channel through one end of the two L-shaped receiving and placing plates (308); the receiving and placing plate connecting shaft The shaft (307) is rotatably connected to the upper end of the unloading hopper (302), and the receiving plate connecting shaft (307) is connected to the other end of the L-shaped receiving plate (308). The rotation of the receiving plate connecting shaft (307) drives the two L-shaped receiving plates (308) to rotate, thereby allowing the pallet pads caught by the two L-shaped receiving plates (308) to fall into the vertical loading frame (303). The telescopic rod of the receiving plate driving cylinder (305) is rotatably connected to one end of the swing arm (306), and the other end of the swing arm (306) is fixedly connected to the receiving plate connecting shaft (307). The receiving plate driving cylinder (305) controls the swing of the swing arm (306) to drive the receiving plate connecting shaft (307) to rotate.

5. A small box stacking system according to claim 4, characterized in that, A pallet pad baffle (309) is installed between the vertical feeding frame (303) and the unloading station. A discharge gap is provided between the pallet pad baffle (309) and the inner bottom surface of the unloading hopper (302) to facilitate the sliding of a pallet pad from the unloading station to the annular guide rail (102). The unloading station is provided with pallet pad baffles (309) on both the side near the annular guide rail (102) and the other side. Vertical supports are installed at both ends of the pallet pad baffles (309) on both sides of the unloading station. The support rod (310) and the linear push plate mechanism can pass through the two vertical support rods (310) and push the pallet pad on the unloading station; a horizontal support plate (311) is provided in the conveying support (301) below the unloading station, the lower ends of all the vertical support rods (310) are fixedly connected to the horizontal support plate (311), and each vertical support rod (310) is slidably connected between the unloading chamber (302) and the conveying support (301) in the vertical direction; A support plate lifting shaft (312) is provided below the horizontal support plate (311). The two ends of the support plate lifting shaft (312) are connected to the horizontal support plate (311) through a lifting seat (313). A first pull plate (314) is slidably connected to the conveying support (301) below the horizontal support plate (311). The first pull plate (314) has an inclined lifting shaft height adjustment hole. The middle part of the support plate lifting shaft (312) is slidably connected in the lifting shaft height adjustment hole. A pull plate driving cylinder (315) is also installed on the conveying support (301). The telescopic rod of the pull plate driving cylinder (315) is connected to the first pull plate (314) to drive the first pull plate (314) to slide on the conveying support (301) through the pull plate driving cylinder (315), thereby causing the support plate lifting shaft (312) to slide relative to the lifting shaft height adjustment hole along the extension direction of the lifting shaft height adjustment hole.

6. A small box stacking system according to claim 1, characterized in that, The annular guide rail conveying device (1) also includes pallet pad limiting plates (107) installed on both sides of the annular guide rail (102). The two pallet pad limiting plates (107) are located between the pallet pad inlet (103) and the outlet (104) of the annular guide rail (102). The pallet pad limiting plate (107) corresponding to the three-four stacked small box inlet (105) has a first clearance opening in the middle, which facilitates the three-four stacking device (8) to push the three-four stacked small boxes through the first clearance opening onto the pallet pad at the three-four stacked small box inlet (105). The pallet pad limiting plate (107) corresponding to the two-five stacked small box inlet (106) has a second clearance opening in the middle, which facilitates the two-five stacking device (2). The small boxes stacked in two-to-five configurations are pushed through the second clearance opening onto the pallet pad at the inlet (106) of the two-to-five stacked small boxes. Multiple receiving plates (108) for placing the pallet pads are fixedly connected to the annular guide rail (102). Between the pallet pad inlet (103) and the outlet (104), the receiving plates (108) move between two pallet pad limiting plates (107). Multiple clamping devices (109) are installed on the two pallet pad limiting plates (107) between the outlet (104) and the inlet (105) of the three-to-four stacked small boxes or the inlet (106) of the two-to-five stacked small boxes to prevent the small boxes conveyed on the annular guide rail (102) from jumping.

7. A small box stacking system according to claim 1, characterized in that, The single-box pushing device (7) includes a single-box pushing base plate (701), a single-box pushing cylinder (702), and a single-box pushing plate (703). The single-box pushing base plate (701) is fixedly installed on the machine body (9). The small box outlet of the single-box pushing base plate (701) is located at one end. The single-box pushing cylinder (702) is installed at the other end of the single-box pushing base plate (701), and the telescopic rod of the single-box pushing cylinder (702) is connected to the single-box pushing plate (703) to control the single-box pushing plate (703) to push the small box located at the small box outlet to the first small box inlet of the three-four stacking device (8) through the single-box pushing cylinder (702). The single-box push base plate (701) is equipped with a first small box triggering sensor (704) located on one side of the single-box push base plate (701) at the small box outlet, and a small box inlet is provided on the other side of the single-box push base plate (701) corresponding to the first small box triggering sensor (704).

8. A small box stacking system according to claim 1, characterized in that, The three-four stacking device (8) includes a three-four stacking platform (801). One end of the three-four stacking platform (801) is connected to the single box pushing device (7) and is provided with the first small box inlet of the three-four stacking device (8). The top surface of the three-four stacking platform (801) is a "-" shaped structure with a sinking groove (802) at one end, and the depth of the sinking groove (802) is the same as the thickness of a small box. The small box outlet of the three-four stacking device (8) is located on the side of the three-four stacking platform (801) close to the annular guide rail (102). A three-four stacking pushing cylinder (803) is installed on the other side of the three-four stacking platform (801). A three-four stacking push plate (804) is connected to the telescopic rod of the three-four stacking pushing cylinder (803), and the lower end of the three-four stacking push plate (804) is a "-" shaped structure that matches and contacts the top surface of the three-four stacking platform (801). The other end of the three-four stacking platform (801) is connected to a three-three stacking base (805). A three-three stacking channel is provided in the middle of the three-three stacking base (805). A lifting cylinder (806) connected to the three-three stacking base (805) is provided below the three-three stacking channel. A three-three stacking lifting plate (807) used as a small box receiving plate is connected to the telescopic rod of the lifting cylinder (806). The end of the three-three stacking base (805) away from the three-four stacking platform (801) is provided with a second small box inlet of the three-four stacking device (8) so that the small box can slide from the second small box inlet onto the three-three stacking lifting plate (807) in the three-three stacking channel. Both sides of the three-three stacking channel are provided with anti-return support components located above the three-three stacking lifting plate (807), so that each layer of small boxes stacked on the three-three stacking lifting plate (807) can be lifted onto the anti-return support component by the lifting cylinder (806), and the three-three stacking is completed on the anti-return support component; A three-three stacking push cylinder (808) is installed between the three-four stacking platform (801) and the three-three stacking base (805). A three-three stacking push plate (809) is connected to the telescopic rod of the three-three stacking push cylinder (808). The three-three stacking push plate (809) is controlled by the three-three stacking push cylinder (808) to push the small boxes stacked in three-three on the check support assembly onto the three-four stacking platform (801). The anti-return support assembly includes an anti-return support plate (810) and a return spring (811). Support plate clearance grooves are provided on both sides of the 3x3 stacking base (805) of the 3x3 stacking channel. An anti-return support plate (810) is provided in each support plate clearance groove. The side of the two anti-return support plates (810) that is close to each other extends into the 3x3 stacking channel. In the natural state, the distance between the two anti-return support plates (810) is less than the width of the small box. The other side of the two anti-return support plates (810) passes through the support plate clearance groove and is connected to the upper end of the return spring (811). The lower end of the return spring (811) is connected to the 3x3 stacking base (805). The bottom surface of one side of the two anti-return support plates (810) is a guide slope to facilitate the small box to push the anti-return support plates (810) to both sides of the 3x3 stacking base (805).

9. A small box stacking system according to claim 1, characterized in that, The two-five stacking device (2) includes a two-five stacking support (201), on which a first small box belt conveyor (202) is installed. A box feeder (203) is installed at the input end of the first small box belt conveyor (202) to facilitate the sequential stacking of small boxes from top to bottom within the box feeder (203), and to allow the small boxes at the lower end of the box feeder (203) to fall sequentially to the input end of the first small box belt conveyor (202). A single-five stacking base plate (204) is provided at the output end of the first small box belt conveyor (202), and a single-five box pushing cylinder (205) and a second small box are respectively provided on both sides of the single-five stacking base plate (204). A belt conveyor (206) is provided, and the upper end of the second small box belt conveyor (206) is horizontally lower than the upper end of the single five-stack base plate (204) in the horizontal direction. This is used to push two layers of small boxes back and forth onto the second small box belt conveyor (206) via the single five-push-box cylinder (205) and stack them on the second small box belt conveyor (206). A two-five-push-box cylinder (207) is installed on one side of the output end of the second small box belt conveyor (206), and the other side of the second small box belt conveyor (206) opposite to the two-five-push-box cylinder (207) is the two-five-stack small box inlet (106) of the annular guide rail (102).

10. A small box stacking system according to claim 1, characterized in that, The output assembly device (6) includes an output assembly base (601), and a support panel (602) is mounted on the upper end of the output assembly base (601). One end of the support panel (602) is correspondingly arranged with the output outlet (104) of the annular guide rail (102) so that the small box at the output outlet (104) can be transported to one end of the support panel (602) through the annular guide rail (102). Mounting plates (603) are vertically connected to both sides of the support panel (602), and a mounting plate (603) is provided in the middle of the support panel (602). The material pushing channel vertically penetrates two mounting plates (603). The upper part of the two mounting plates (603) is equipped with a motor-controlled conveyor belt (604). The two conveyor belts (604) are higher than the material pushing channel in the horizontal direction. Multiple small box scrapers (605) are evenly installed between the two conveyor belts (604) to drive the small box scrapers (605) to move and scrape the small box located at one end of the support panel (602) into the material pushing channel in the middle of the support panel (602). One end of the feeding channel is provided with an output channel (606) connected to the support panel (602). An output feeding mechanism is installed on the output assembly base (601) at the other end of the feeding channel to push the small box located in the feeding channel to the output channel (606). The output feeding mechanism includes two parallel feeding rails (607), and a feeding slide (608) is slidably connected between the two feeding rails (607). The upper end of the feeding slide (608) is connected to an output feeding plate (610) through a feeding plate seat (609) extending towards the feeding channel. The output feeding mechanism also includes an output feeding drive mechanism for driving the feeding slide (608) to slide between the two feeding rails (607). The output feeding drive mechanism is installed on the output assembly base (601).

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