BUFFER STORAGE STATION, REPLENISHER, AND AUTOMATIC REPLENISHMENT SYSTEM

Abstract

Provided are a buffer storage station, a replenisher, and an automatic replenishment system. The buffer storage station includes a buffer storage shelf and a gate assembly. The buffer storage shelf is provided with an inclined buffer storage lane, and the buffer storage lane includes a collecting port located at a lower position. The gate assembly includes an upper gate plate member rotatably connected at the collecting port, and the upper gate plate member has an open position where the upper gate plate member allows the collecting port to be opened and a closed position where the upper gate plate member allows the collecting port to be closed. Since the buffer storage station is provided with an inclined buffer storage lane, the goods may slide downward along the inclined buffer storage lane by gravity and pass through the opened collecting port once the collecting port is opened so that the entire process of collecting goods becomes continuous and efficient. Therefore, not only the efficiency of collecting goods is improved, but also the safety becomes high since the goods do not need to be carried manually. The gate—push assembly of the replenisher can drive the upper gate plate member to be switched to the open position to open the collecting port so that the replenisher body can continuously collect goods from the buffer storage station. The automatic replenishment system includes a buffer storage station and a replenisher.

Description

TECHNICAL FIELD The present invention relates to the field of automatic replenishment technology, and in particular, to a buffer storage station, a replenisher, and an automatic replenishment system. BACKGROUND An automatic picking system is a system that directly picks goods from its storage shelf according to the information of an order and packs all the picked target goods for delivery out of the warehouse after the order is completed. The automatic picking system mainly includes a storage shelf and a picking mechanism. The automatic picking system needs to replenish goods onto the storage shelf regularly to respond to future order demands. In the related art, for a replenishment device used for replenishing goods onto the storage shelf, the goods are generally replenished manually onto the replenishment device first. The method of manually replenishing goods onto the replenishment device has the following shortcomings. A worker responsible for replenishing goods needs to stay around the device all the time to be prepared to replenish goods onto the replenishment device in time and needs to replenish the goods one by one. As a result, the time for getting the goods prepared becomes long, thereby affecting the efficiency of the automatic picking system in picking goods from the replenishment device. Since a large quantity of manpower is required during goods replenishment, injuries to workers or worse may occur, thereby resulting in poor safety. Further relevant technologies are discussed in the patent application publications: US 3 674 159 A, CN 103 158 991 B and US 6 971 833 B1. SUMMARY A first object of the present invention is to provide a buffer storage station. The buffer storage station is capable of storing a large number of goods, and the process of releasing the goods is not only continuous and efficient but also safe and reliable. A second object of the present invention is to provide a replenisher. The replenisher is capable of efficiently and safely collecting goods from a buffer storage station. A third object of the present invention is to provide an automatic replenishment system. A replenisher of the automatic replenishment system is capable of efficiently collecting goods from a buffer storage station, and the automatic replenishment system is safe and reliable. To achieve the above objects, the present invention adopts the following technical solutions. A buffer storage station is provided. The buffer storage station includes a buffer storage shelf and a gate assembly. The buffer storage shelf is provided with an inclined buffer storage lane. The buffer storage lane includes a collecting port located at a lower position. The gate assembly includes an upper gate plate member rotatably connected at the collecting port. The upper gate plate member has an open position where the upper gate plate member allows the collecting port to be opened and a closed position where the upper gate plate member allows the collecting port to be closed. Goods in the buffer storage lane may pass through the opened collecting port sequentially by gravity. Preferably, the buffer storage shelf includes a buffer storage bottom plate forming the bottom surface of the buffer storage lane. The included angle between the wide side of the buffer storage bottom plate and the horizontal line is an acute angle. Preferably, the buffer storage shelf is provided with multiple buffer storage lanes. The upper gate plate member is disposed at the collecting port of each buffer storage lane. At least part of the multiple upper gate plate members are capable of being switched to the open position simultaneously. Preferably, the gate assembly further includes a reset elastic member. The reset elastic member enables the upper gate plate member to have a tendency to be reset to the closed position. Preferably, the upper gate plate member includes a blocking portion and an abutment portion connected at an included angle. The blocking portion is used for blocking the collecting port. The gate assembly further includes a flipper. The flipper includes a push plate rotatably connected to the buffer storage shelf. The push plate abuts against the abutment portion. The reset elastic member is connected between the push plate and the buffer storage shelf. By applying a force to the push plate, the push plate rotates to enable the upper gate plate member to be switched from the closed position to the open position and to enable the reset elastic member to be compressed. Preferably, the flipper further includes a connecting rod and a rotating wheel. The connecting rod is connected to the push plate. The rotating wheel is rotatably connected to the connecting rod. The rotating wheel rollingly abuts against the abutment portion. Preferably, the buffer storage shelf is provided with multiple buffer storage lanes. An upper gate plate member is disposed at the collecting port of each buffer storage lane. Two rotating wheels are disposed. The two rotating wheels rollingly abut against the abutment portions of the two upper gate plate members adjacent to each other, respectively. A replenisher is provided. The replenisher is used for collecting goods from a buffer storage station described above and includes a replenisher body and a gate-push assembly. The replenisher body is provided with an inclined replenishment lane. The replenishment lane includes a receiving port at a higher position. The replenisher is movable to a replenishment position where the receiving port squarely faces the collecting port. The gate-push assembly is capable of driving the upper gate plate member to be switched from the closed position to the open position so that the receiving port is docked with the collecting port. Preferably, the gate assembly further includes a push plate which is rotatably connected to the buffer storage shelf and abuts against the upper gate plate member. The gate-push assembly includes a gate-push drive member and a push member. The gate-push drive member is drivingly connected to the push member and is used for driving the push member to perform linear motion. The push member is capable of pushing the push plate to rotate so that the upper gate plate member is switched from the closed position to the open position. Preferably, the replenisher body includes a lane bottom plate forming the bottom surface of the replenishment lane. The upper gate plate member in the open position is capable of overlapping the lane bottom plate. Preferably, the upper gate plate member includes a protrusion portion overlapping the lane bottom plate. The replenisher further includes an in-position detection member. The in-position detection member is disposed at an end of the lane bottom plate and is used for detecting the protrusion portion. Preferably, the gate-push assembly is capable of driving at least two upper gate plate members to be switched from the closed position to the open position simultaneously. Preferably, the replenisher body includes a lane bottom plate and two lane side plates. The lane bottom plate and the two lane side plates form the replenishment lane. At least one of the two lane side plates is movable to adjust the width of the replenishment lane and / or to align goods entering the replenishment lane. Preferably, the replenisher further includes a variable pitch drive member and / or a side plate detection member. The variable pitch drive member includes a variable pitch motor, a lead screw, and a nut block. The motor shaft of the variable pitch motor is drivingly connected to an end of the lead screw. The nut block is threadedly connected to the lead screw to form a lead screw-nut pair with the lead screw. The nut block is connected to the movable lane side plate. The side plate detection member is disposed on the replenisher body and is used for detecting the lane side plate reset to an initial position. An automatic replenishment system is provided. The automatic replenishment system includes the buffer storage station described above and the replenisher described above. The present invention has the following beneficial effects. The buffer storage station provided by the present invention includes a buffer storage shelf and a gate assembly. The buffer storage shelf is provided with an inclined buffer storage lane, and the buffer storage lane includes a collecting port located at a lower position. The gate assembly includes an upper gate plate member rotatably connected at the collecting port, and the upper gate plate member has an open position where the upper gate plate member allows the collecting port to be opened and a closed position where the upper gate plate member allows the collecting port to be closed. The goods in the buffer storage lane are capable of passing through the opened collecting port sequentially by gravity. Since the buffer storage station is provided with an inclined buffer storage lane, the goods may slide downward along the inclined buffer storage lane by gravity and pass through the opened collecting port once the collecting port is opened so that the entire process of collecting goods becomes continuous and efficient. Therefore, not only the efficiency of collecting goods is improved, but also the safety becomes high since the goods do not need to be carried manually. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic view of an automatic warehouse according to the present invention; FIG. 2 is a schematic view of a replenishment device according to the present invention; FIG. 3 is a schematic view of a buffer storage station at a certain viewing angle according to the present invention; FIG. 4 is a side view of the buffer storage station according to the present invention; FIG. 5 is a schematic view of the buffer storage station at another viewing angle according to the present invention; FIG. 6 is a schematic view of an upper gate plate member of a gate assembly in a closed position according to the present invention; FIG. 7 is a schematic view of the upper gate plate member of the gate assembly in an open position according to the present invention; FIG. 8 is a schematic view of a gate assembly at a certain viewing angle according to the present invention; FIG. 9 is a schematic view of the gate assembly at another viewing angle according to the present invention; FIG. 10 is a schematic view of a buffer storage bottom plate and a buffer storage side plate according to the present invention; FIG. 11 is a schematic view of a gate assembly having two upper gate plate members capable of being opened and closed simultaneously at a certain viewing angle according to the present invention; FIG. 12 is a schematic view of the gate assembly having two upper gate plate members capable of being opened and closed simultaneously at another viewing angle according to the present invention; FIG. 13 is a schematic view of a replenishment device having two replenishers provided with a wide replenishment lane and a narrow replenishment lane respectively according to the present invention; FIG. 14 is a schematic view of the structure shown in FIG. 13 at another viewing angle; FIG. 15 is a schematic view of a replenishment device having two replenishers each provided with a wide replenishment lane according to the present invention; FIG. 16 is a schematic view of the structure shown in FIG. 15 at another viewing angle; FIG. 17 is a schematic view of a replenisher at a certain viewing angle according to the present invention; FIG. 18 is a schematic view of the replenisher at another viewing angle according to the present invention; FIG. 19 is a schematic view of the replenisher at yet another viewing angle according to the present invention; FIG. 20 is a schematic view of part of the structure of the replenisher according to the present invention; FIG. 21 is a schematic view of a drive assembly and a lower gate plate member according to the present invention; FIG. 22 is a top view of the structure shown in FIG. 21; FIG. 23 is a schematic view of the upper gate plate member in the open position overlapping a lane bottom plate of the replenishment lane according to the present invention; FIG. 24 is a schematic view of a protrusion portion of the upper gate plate member covering an in-position detection member according to the present invention; FIG. 25 is a schematic view of the lower gate plate member being adapted to narrow and wide lanes respectively according to the present invention; FIG. 26 is a schematic view of a goods detection member facing a storage lane and detecting the goods in the storage lane according to the present invention; FIG. 27 is a schematic view of an inventory counting device counting goods in the storage lane according to the present invention; FIG. 28 is a schematic view of the inventory counting device according to the present invention; FIG. 29 is an enlarged view of part A in FIG. 28; FIG. 30 is an enlarged diagram of part B in FIG. 28; FIG. 31 is a schematic view of the inventory counting device whose extension structure is not extended according to the present invention; and FIG. 32 is a schematic view of a track member according to the present invention. In the drawings: 100. buffer storage station; 110. buffer storage shelf; 111. buffer storage lane; 112. replenishment port; 113. collecting port; 114. front beam; 115. buffer storage bottom plate; 116. buffer storage side plate; 120. gate assembly; 121. upper gate plate member; 1211. blocking portion; 12111. protrusion portion; 1212. abutment portion; 122. flipper; 1221. push plate; 1222. connecting rod; 1223. rotating wheel; 123. reset elastic member; 124. hinge; 125. rotating shaft; 130. support frame; 200. replenisher; 210. replenisher body; 211. replenishment lane; 212. receiving port; 213. releasing port; 214. lane bottom plate; 215. lane side plate; 220. gate-push assembly; 221. gate-push drive member; 222. push member; 230. in-position detection member; 240. variable pitch drive member; 241. variable pitch motor; 242. lead screw; 243. nut block; 244. conveyor belt mechanism; 2441. driving pulley; 2442. driven pulley; 2443. conveyor belt; 245. connecting push plate; 250. variable pitch mounting bracket; 251. cross beam member; 252. side beam member; 260. side plate detection member; 270. lower gate plate member; 271. first portion; 272. second portion; 280. drive assembly; 281. drive component; 282. push-pull member; 2821. stud ball; 2822. reset elastic body; 2823. fixed plate; 283. mounting abutment member; 291. discharging detection member; 292. goods detection member; 293. limit block; 300. loading platform; 400. guide structure; 500. inventory counting device; 510. extendable structure; 511. limit slot; 520. inventory counting structure; 530. moving member; 540. telescopic drive member; 541. telescopic motor; 542. synchronous belt structure; 5421. driving wheel; 5422. synchronous belt; 5423. driven wheel; 550. track member; 551. first mounting plate; 552. track plate; 553. third mounting plate; 554. first side plate; 555. second side plate; 560. first support wheel; 570. second support wheel; 581. first hinge mount; 582. second hinge mount; 583. limit member; 584. second mounting plate; 10. automatic picking system; 11. storage lane; 12. goods; 101. lane entrance; 102. lane exit; 20. automatic replenishment system. DETAILED DESCRIPTION The present invention is further described hereinafter in detail in conjunction with drawings and embodiments. It is to be understood that the embodiments described here are intended to explain the present invention and not to limit the present invention. In addition, it is to be noted that for ease of description, only part, not all, of the structures related to the present invention are illustrated in the drawings. In the description of the present invention, the terms "joined", "connected", and "fixed" are to be understood in a broad sense unless otherwise expressly specified and limited. For example, the term "connected" may refer to "fixedly connected", "detachably connected", or "integrated"; may refer to "mechanically connected" or "electrically connected"; may refer to "connected directly", "connected indirectly through an intermediary"; or may refer to "the connection between two components" or "the interaction between the two components". For those of ordinary skill in the art, specific meanings of the preceding terms in the present invention may be construed based on specific situations. In the present invention, unless otherwise expressly specified and limited, when a first feature is described as "on" or "below" a second feature, the first feature and the second feature may be in direct contact or may be in contact via another feature between the two features instead of being in direct contact. Moreover, when a first feature is described as "on", "above", or "over" a second feature, the first feature is right on, above, or over the second feature, the first feature is obliquely on, above, or over the second feature, or the first feature is simply at a higher level than the second feature. When the first feature is described as "under", "below", or "underneath" the second feature, the first feature is right under, below, or underneath the second feature, the first feature is obliquely under, below, or underneath the second feature, or the first feature is simply at a lower level than the second feature. In the description of embodiments, orientations or position relations indicated by terms such as "upper", "lower", and "right" are based on the drawings. These orientations or position relations are intended only to facilitate description and simplify operations and not to indicate or imply that a device or element referred to must have such particular orientations or must be configured or operated in such particular orientations. Thus, these orientations or position relations are not to be construed as limiting the present invention. In addition, the terms "first" and "second" are merely used for descriptive purposes and have no special meanings. As shown in FIG. 1, the present invention discloses an automatic warehouse. The automatic warehouse includes an automatic picking system 10 and an automatic replenishment system 20. The automatic replenishment system 20 is capable of replenishing the automatic picking system 10 to ensure that the automatic picking system 10 has sufficient goods 12 to be packed according to the information of an order. The automatic picking system 10 includes a storage shelf and a picking mechanism. The storage shelf is a three-dimensional shelf for storing goods 12 in the automatic picking system 10. The storage shelf is provided with a storage lane 11. The storage lane 11 is inclined relative to the horizontal direction. The storage lane 11 includes a lane entrance 101 at a higher position and a lane exit 102 at a lower position. The goods 12 are put into the storage lane 11 from the lane entrance 101 and are capable of moving along the storage lane 11 to the lane exit 102. The goods 12 stay at the lane exit 102 until the goods 12 are picked by the picking mechanism of the automatic picking system 10. The structure of the picking mechanism is the related art and will not be described in detail here. It is to be noted that to increase the inventory amount, multiple storage lanes 11 are disposed side-by-side in the height direction of the storage shelf. Each storage lane 11 may store the same or different goods 12. The picking mechanism may move in the vertical direction to pick goods 12 from different storage lanes 11. In this manner, the automatic picking system 10 may efficiently complete the order. With continued reference to FIGS. 1 and 2, the automatic replenishment system 20 includes a buffer storage station 100 and a replenishment device. The buffer storage station 100 is located next to the storage shelf and is a small storage mechanism that is capable of temporarily storing part of the goods 12. The replenishment device moves to and is docked with the buffer storage station 100 and collects the goods 12 from the buffer storage station 100. Then the replenishment device moves to the storage shelf and puts the goods 12 into the storage lane 11 of the storage shelf from the lane entrance 101. It is to be noted that the height of the buffer storage station 100 is low so a worker responsible for replenishment just needs to stand on the ground and then put the goods 12 into the buffer storage station 100, thereby simplifying the operation. Moreover, the worker only needs to replenish the buffer storage station 100 if needed to meet the replenishment requirements of the automatic picking system 10. During replenishment, the worker also does not need to come into contact with the moving replenishment device. Therefore, the automatic replenishment system 20 is highly safe, efficient in replenishment, and reliable. As shown in FIGS. 3 to 9, the buffer storage station 100 includes a buffer storage shelf 110 and a gate assembly 120. The buffer storage shelf 110 is provided with an inclined buffer storage lane 111. The buffer storage lane 111 includes a replenishment port 112 at a higher position and a collecting port 113 located at a lower position. The gate assembly 120 includes an upper gate plate member 121 rotatably connected at the collecting port 113. The upper gate plate member 121 has an open position where the upper gate plate member 121 allows the collecting port 113 to be opened and a closed position where the upper gate plate member 121 allows the collecting port 113 to be closed. The worker puts goods 12 into the buffer storage shelf 110 from the replenishment port 112 at a higher position. The goods 12 slide along the buffer storage lane 111 inclined in the height direction to the collecting port 113 at a lower position and are ultimately blocked by the gate assembly 120 which is in the closed position. The goods 12 are continuously put into the replenishment port 112 until the buffer storage lane 111 is full of goods 12. When the replenishment device moves to the collecting port 113, the gate assembly 120 may be controlled to be switched from the closed position to the open position where the gate assembly 120 allows the collecting port 113 to be opened. The replenishment device may then collect the goods 12 from the opened collecting port 113. After the goods 12 at the lowest position is collected by the replenishment device, the goods 12 at higher positions in the buffer storage lane 111 slide downward by gravity and pass through the opened collecting port 113 sequentially so that the goods 12 in the buffer storage lane 111 may be collected one by one by the replenishment device. When the inventory of goods 12 in the buffer storage station 100 is insufficient, the worker continues to replenish the goods into the buffer storage station 100. Since the buffer storage station 100 is provided with an inclined buffer storage lane 111, the goods 12 may slide downward along the inclined buffer storage lane by gravity and pass through the opened collecting port 113 once the collecting port 113 is opened so that the entire process of collecting goods becomes continuous and efficient. Therefore, not only the efficiency of collecting goods is improved, but also the safety becomes high since the goods 12 do not need to be carried manually. Optionally, multiple buffer storage lanes 111 are disposed. The gate assembly 120 is disposed at the collecting port 113 of each buffer storage lane 111. Optionally, the multiple buffer storage lanes 111 are arranged in rows and columns, and the same or different goods 12 may be stored in each buffer storage lane 111. In some embodiments, as shown in FIG. 10, the buffer storage shelf 110 includes a buffer storage bottom plate 115 forming the bottom surface of the buffer storage lane 111. The included angle between the wide side of the buffer storage bottom plate 115 and the horizontal line is an acute angle. Through the above setting, the goods 12 may be tilted to one side in the width direction of the buffer storage bottom plate 115 when the goods 12 slide downward on the buffer storage bottom plate 115 so that the goods 12 may be aligned while moving in the buffer storage lane 111, thereby facilitating the subsequent accurate goods collecting by the replenishment device. Further, the buffer storage shelf 110 further includes a buffer storage side plate 116 disposed on one side of the buffer storage bottom plate 115. The buffer storage side plate 116 is disposed vertically, and the goods 12 may slide downward against the buffer storage side plate 116. Optionally, two buffer storage side plates 116 are disposed. In the width direction of the buffer storage bottom plate 115, the two buffer storage side plates 116 are disposed on both sides of the buffer storage bottom plate 115. A U-shaped buffer storage lane 111 with an open top is enclosed by the buffer storage bottom plate 115 and the two buffer storage side plates 116. With continued reference to FIGS. 3 to 5, the buffer storage shelf 110 further includes a support frame 130. The support frame 130 is used for supporting the buffer storage bottom plate 115 and the buffer storage side plate 116. In an embodiment, the support frame 130 includes crossbars and uprights. Multiple crossbars and multiple uprights are spliced together to form a cubic frame structure. In an embodiment, the support frame 130 further includes multiple lane plates. The multiple lane plates are cross-connected to from grids, and one set of a buffer storage bottom plate 115 and a buffer storage side plate 116 is mounted in each of the grids. In an embodiment, the support frame 130 further includes ground nails. The ground nails may stably fix the support frame 130 on the ground, thereby preventing the buffer storage station 100 from tipping over. In some embodiments, with continued reference to FIG. 6, the upper gate plate member 121 is basically an L-shaped structure. The upper gate plate member 121 includes a blocking portion 1211 and an abutment portion 1212 connected at an included angle. The blocking portion 1211 is used for blocking the collecting port 113. The abutment portion 1212 is used for bearing a support force to enable the upper gate plate member 121 to remain in the closed position. When the support force disappears, the upper gate plate member 121 loses support and is directly switched from the closed position to the open position. It is to be noted that an external force that causes the upper gate plate member 121 to lose support may come from the replenishment device or other power members. In an embodiment, the upper gate plate member 121 is rotatably connected at the collecting port 113. The upper gate plate member 121 further includes a hinge 124. One end of the hinge 124 is fixed to the abutment portion 1212, and the other end is fixed to the buffer storage shelf 110. Optionally, the buffer storage shelf 110 includes a front beam 114 disposed at the collecting port 113, and the other end of the hinge 124 is fixed on the front beam 114. Of course, in other embodiments, the upper gate plate member 121 may also be movably disposed at the collecting port 113, and the switch between the closed position and the open position may be achieved through the movement of the upper gate plate member 121. With continued reference to FIGS. 6 to 9, the gate assembly 120 further includes a flipper 122. The flipper 122 is used for supporting the upper gate plate member 121 and bearing an external force changing the support state of the upper gate plate member 121 to enable the upper gate plate member 121 to rotate and be opened. Optionally, the flipper 122 is rotatably connected to the buffer storage shelf 110, and the flipper 122 abuts against the abutment portion 1212. In some embodiments, the flipper 122 includes a push plate 1221. The push plate 1221 is rotatably connected to the buffer storage shelf 110. Optionally, a rotating shaft base is disposed on the front beam 114. The push plate 1221 is rotatably connected to the rotating shaft base through a rotating shaft 125. By applying a force to the push plate 1221, the push plate 1221 may rotate around the rotating shaft 125 to enable the upper gate plate member 121 to be switched from the closed position to the open position. It is to be noted that the force is applied in a direction represented by the arrow in FIG. 6. With continued reference to FIG. 6, the rotating shaft 125 is disposed at a lower position in the middle of the push plate 1221. The top of the push plate 1221 may support the abutment portion 1212 of the upper gate plate member 121. When a force is applied in the direction represented by the arrow in FIG. 6, the top of the push plate 1221 moves toward the front beam 114 so that the abutment portion 1212 loses support. The upper gate plate member 121 rotates in the counterclockwise direction by gravity and is switched from the state shown in FIG. 6 to the state shown in FIG. 7, thereby completing the switch from the closed position to the open position. After the replenishment device collects goods from the collecting port 113, to enable the upper gate plate member 121 to be automatically reset to the closed position and enable the upper gate plate member 121 to remain in the closed position in the absence of an external force, with continued reference to FIGS. 6 to 9, the gate assembly 120 further includes a reset elastic member 123. The reset elastic member 123 is disposed between the flipper 122 and the buffer storage shelf 110. The reset elastic member 123 enables the upper gate plate member 121 to have a tendency to be reset to the closed position. It is to be noted that during the process of applying a force to the push plate 1221 in the direction represented by the arrow in FIG. 6, the reset elastic member 123 is compressed and accumulates elastic potential energy. After the force on the push plate 1221 is withdrawn, under the action of the reset elastic member 123, the upper gate plate member 121 is reset from the state shown in FIG. 7 to the state shown in FIG. 6, thereby completing the switch from the open position to the closed position. To reduce the friction generated on the upper gate plate member 121 during the movement of the push plate 1221 to reduce the wear and tear of the upper gate plate member 121, the flipper 122 further includes a connecting rod 1222 and a rotating wheel 1223. The connecting rod 1222 is connected to the push plate 1221. The rotating wheel 1223 is rotatably connected to the connecting rod 1222. The rotating wheel 1223 rollingly abuts against the abutment portion 1212. In an embodiment, the reset elastic member 123 includes a coil spring. One end of the coil spring is fixed on the push plate 1221, and the other end of the coil spring is fixed on the front beam 114. Of course, in addition to the coil spring, the reset elastic member 123 may also be another elastic body such as a leaf spring. Since multiple buffer storage lanes 111 are disposed on the buffer shelf 110 and each buffer storage lane 111 is provided with an upper gate plate member 121 at the collecting port 113, during a replenishment process of the replenishment device, multiple collecting ports 113 may need to be opened for goods collecting. Therefore, multiple upper gate plate members 121 or multiple flippers 122 may be connected through a connecting member to meet the needs to synchronously open and synchronously close multiple collecting ports 113. In some embodiments, goods may need to be collected from two adjacent collecting ports 113. To improve the collecting efficiency, as shown in FIGS. 11 and 12, one end of the flipper 122 may simultaneously abut against the abutment portions 1212 of the two upper gate plate members 121 disposed adjacent to each other. In this manner, the two collecting ports 113 may be opened simultaneously with one flip of the flipper 122. In a specific embodiment, two rotating wheels 1223 are disposed, and the two rotating wheels 1223 rollingly abut against the abutment portions 1212 of the two upper gate plate members 121 adjacent to each other, respectively. It is to be noted that the number of connecting rods 1222 may be set to one or two according to requirements. If the number of connecting rods 1222 is set to one, the length of the connecting rod 1222 is relatively long, both ends of the connecting rod 1222 protrude relative to the push plate 1221, respectively, and the two rotating wheels 1223 are rotatably connected to the ends of the connecting rod 1222. If the number of connecting rods 1222 is set to two, the length of each connecting rod 1222 is relatively short, the two connecting rods 1222 protrude relative to the push plate 1221, respectively, and the two rotating wheels 1223 are rotatably connected to the two connecting rods 1222 in a one-to-one correspondence. As shown in FIGS. 2 and 13 to 16, the replenishment device includes a traveling mechanism, a loading platform 300, and a liftable replenisher 200. The replenishment device may move between the buffer storage station 100 and the storage shelf through the traveling mechanism. The specific structure of the traveling mechanism will not be described in detail here. The traveling mechanism may be implemented through the cooperation of a traveling body, a power component, and a track component. The power component drives the traveling body to move on the track component to enable the loading platform 300 and the replenisher 200 located on the traveling body to move synchronously. In addition, the traveling mechanism may also be other structures capable of outputting linear motion, such as a moving platform composed of a motor and a belt drive structure. With continued reference to FIG. 2, the travelling mechanism includes a guide structure 400 vertically disposed. Optionally, the guide structure 400 is a vertical guide track. The loading platform 300 is liftably disposed on the guide structure 400. The replenisher 200 is disposed on the loading platform 300 and is lifted synchronously with the loading platform 300. The lifting drive structure that drives the loading platform 300 to be lifted along the guide track will not be described in detail here, and the lifting drive structure may be any mechanism capable of outputting linear motion, such as a linear motor, the combination of a motor and a pinion and rack, or a cylinder. The replenisher 200 is the main structure for achieving the docking of the replenishment device with the buffer storage station 100 and the storage shelf and has both a goods collecting function and a replenishment function. Specifically, as shown in FIGS. 17 to 26, the replenisher 200 includes a replenisher body 210. The replenisher body 210 is provided with an inclined replenishment lane 211. The replenishment lane 211 includes a receiving port 212 at a higher position and a releasing port 213 at a lower position. The receiving port 212 is used for receiving the goods 12, and the releasing port 213 is used for releasing the goods 12. Driven by the loading platform 300, the replenisher 200 is capable of moving to the replenishment position where the receiving port 212 squarely faces the collecting port 113 of the buffer storage station 100. Specifically, the replenisher body 210 includes a lane bottom plate 214 and two lane side plates 215. The lane bottom plate 214 and the two lane side plates 215 form the replenishment lane 211. In the width direction of the lane bottom plate 214, the two lane side plates 215 are disposed on both sides of the lane bottom plate 214. A U-shaped replenishment lane 211 with an open top is enclosed by the lane bottom plate 214 and the two lane side plates 215 to stably protect the goods 12 and prevent the goods 12 from falling out of the replenishment lane 211. Optionally, the degree of inclination of the replenishment lane 211 and the degree of inclination of the buffer storage lane 111 of the buffer storage station 100 may be the same or different, and the degree of inclination of the two may be set flexibly according to requirements, as long as the goods 12 can smoothly enter the replenishment lane 211 from the buffer storage lane 111. To enable the collecting port 113 to be opened synchronously while the replenisher 200 is docked with the buffer storage station 100 to improve the efficiency in goods collecting, as shown in FIG. 18, the replenisher 200 further includes a gate-push assembly 220. The gate-push assembly 220 is capable of driving the upper gate plate member 121 to be switched from the closed position to the open position and enabling the receiving port 212 to be docked with the collecting port 113. That is, the gate-push assembly 220 is used for applying an external force to the flipper 122 in the direction represented by the arrow in FIG. 6 to enable the flipper 122 to rotate. The rotation of the flipper 122 withdraws the support of the upper gate plate member 121 and enables the upper gate plate member 121 to fold counterclockwise. In some embodiments, the gate-push assembly 220 includes a gate-push drive member 221 and a push member 222. The gate-push drive 221 is disposed on a side of the replenisher body 210 close to the buffer storage station 100. Optionally, the gate-push drive member 221 is disposed on the replenisher body 210. The gate-push drive member 221 is drivingly connected the push member 222 and is used for driving the push member 222 to perform linear motion. The push member 222 is used for applying a force to the flipper 122. Optionally, the gate-push drive member 221 is a linear motor; the push member 222 is a push rod, and the end of the push rod is provided with a cylindrical push block (not shown) for urging the push plate 1221. During goods collecting of the replenisher 200, the gate-push drive member 221 drives the push member 222 to move toward the flipper 122 to enable the push member 222 to be in contact with the push plate 1221 of the flipper 122. The push plate 1221 rotates around its rotating shaft 125 under the push of the push member 222 to enable the upper gate plate member 121 to be opened. The goods 12 in the buffer storage lane 111 pass through the collecting port 113 and the receiving port 212 by gravity and enter the replenishment lane 211, and subsequent goods 12 are replenished sequentially. After the to-be-replenished replenishment lane 211 is replenished with the goods 12, the force applied to the push plate 1221 is withdrawn, and the upper gate plate member 121 is reset to the closed position under the action of the reset elastic member 123 and waits for the next time to be opened. To improve the smoothness of the goods 12 entering the replenishment lane 211 from the buffer storage lane 111, as shown in FIG. 23, the upper gate plate member 121 in the open position overlaps the lane bottom plate 214 of the replenishment lane 211. Further, with continued reference to FIG. 18, the replenisher 200 further includes an in-position detection member 230. The in-position detection member 230 is disposed at an end of the lane bottom plate 214 and is used for detecting the upper gate plate member 121. Optionally, the in-position detection member 230 is an in-position sensor and may be a proximity switch. When the upper gate plate member 121 overlaps the lane bottom plate 214 of the replenishment lane 211, the in-position detection member 230 may send a confirmation signal confirming that the upper gate plate member 121 is opened. Optionally, as shown in FIG. 24, the upper gate plate member 121 includes a protrusion portion 12111. The protrusion portion 12111 cooperates with the in-position detection member 230. When the upper gate plate member 121 is in the open position, the protrusion portion 12111 just covers the in-position detection member 230. Further, optionally, a groove is disposed at the end of the lane bottom plate 214, and the in-position detection member 230 is disposed in the groove. The protrusion portion 12111 overlaps the groove so that the protrusion portion 12111 does not protrude relative to the lane bottom plate 214 and does not avoid affecting the smoothness of movement of the goods 12. Due to a variety of categories of goods 12 having different widths, to adjust the width of the replenishment lane 211 to enable the replenishment lane 211 to adapt to the goods 12 having different widths, with continued reference to FIGS. 13, 14, 17, and 18, at least one of the two lane side plates 215 included in the replenisher body 210 is movable to adjust the width of the replenishment lane 211. That is, in some embodiments, one of the two lane side plates 215 is fixed while the other is movable. The movable lane side plate 215 is capable of moving toward or away from the fixed lane side plate 215 to change the width of the replenishment lane 211 enclosed by the two lane side plates 215 and part of the lane bottom plate 214 located between the two lane side plates 215. In some parallel embodiments, the two lane side plates 215 may both be movable. That is, the two lane side plates 215 are capable of moving toward or away from each other to change the width of the replenishment lane 211 enclosed by the two lane side plates 215 and part of the lane bottom plate 214 located between the two lane side plates 215. To enable the lane side plate 215 to move, with continued reference to FIGS. 18 and 19, the replenisher 200 further includes a variable pitch drive member 240. The variable pitch drive member 240 is used for driving the lane side plate 215 to move. Optionally, the variable pitch drive member 240 includes a variable pitch motor 241, a lead screw 242, and a nut block 243. The motor shaft of the variable pitch motor 241 is drivingly connected to an end of the lead screw 242. The nut block 243 is threadedly connected to the lead screw 242 to form a lead screw-nut pair with the lead screw 242. The nut block 243 is connected to the movable lane side plate 215. Optionally, The nut block 243 is connected to the movable lane side plate 215 through a connecting push plate 245. When the variable pitch motor 241 works, the lead screw 242 may rotate around its central axis, and the nut block 243 may move in the axial direction of the lead screw 242, thereby driving the lane side plate 215 to move. It is to be noted that, when only one lane side plate 215 needs to be driven to move, the lead screw 242 is a screw with a single rotation direction, and the number of nut blocks 243 is one. When two lane side plates 215 need to be driven to move, the lead screw 242 may be a double-thread screw having two thread segments with different rotational directions, and the number of nut blocks 243 is two. The two nut blocks 243 are threadedly connected to the thread segments with different rotation directions, respectively, and the two nut blocks 243 are connected to the two lane side plates 215 in a one-to-one correspondence. Further, the variable pitch drive member 240 further includes a conveyor belt mechanism 244. The variable pitch motor 241 is drivingly connected to the lead screw 242 through the conveyor belt mechanism 244. Specifically, the conveyor belt mechanism 244 includes a driving pulley 2441, a driven pulley 2442, and a conveyor belt 2443. The motor shaft of the variable pitch motor 241 is connected to the driving pulley 2441. The driving pulley 2441 is spaced apart from the driven pulley 2442. The driven pulley 2442 is sleeved on the lead screw 242. The conveyor belt 2443 is sleeved on the driving pulley 2441 and the driven pulley 2442. With continued reference to FIG. 18, the replenisher 200 further includes a variable pitch mounting bracket 250. Part of the structure of the variable pitch drive member 240 is mounted on the variable pitch mounting bracket 250. Optionally, the variable pitch mounting bracket 250 is an inverted U-shaped structure. The variable pitch mounting bracket 250 includes a cross beam member 251 and two side beam members 252 connected to both ends of the cross beam member 251, respectively. The cross beam member 251 is disposed above the two lane side panels 215 and stretches across the lane bottom plate 214. The bottom ends of the two side beam members 252 are connected to both sides of the lane bottom plate 214 in the width direction, respectively. In an embodiment, the variable pitch motor 241 is fixed below the lane bottom plate 214, the conveyor belt mechanism 244 is mounted on the fixed lane side plate 215, and the lead screw 242 is located below the cross beam member 251 and rotatably connected to the two side beam members 252. Of course, if both the lane side plates 215 are movable, the structure or the position of the variable pitch mounting bracket 250 may be adjusted so that the mounting of the variable pitch drive member 240 does not affect the movement of the lane side plates 215 and the movement of the goods 12 in the replenishment lane 211. Of course, in addition to the combination of a motor and a lead screw nut, the variable pitch drive member 240 may also be set according to requirements and may be configured as any other mechanism capable of outputting linear motion, such as the combination of a motor and a pinion and rack, a linear motor, or a cylinder. By setting the width of the replenishment lane 211 to be adjustable, the replenishment device may not only adapt to the goods 12 having different widths but also align the goods 12 entering the replenishment lane 211 by moving the lane side plate 215 to improve the orderliness of the movement of the goods 12 and lower the requirements for subsequent replenishment accuracy of the storage lane 11. It is to be noted that, after the collecting port 113 of the buffer storage station 100 is opened, the goods 12 in the buffer storage lane 111 smoothly enter the replenishment lane 211, and during this process, the goods 12 may be placed on the replenishment lane 211 disorderly. By moving the movable lane side plate 215, the lane side plate 215 presses the goods 12 to make the goods 12 orderly. After the goods 12 become orderly, the movable lane side plate 215 moves in the reverse direction at a small distance so that the width of the replenishment lane 211 becomes sufficient and does not affect the entry of the subsequent goods 12. Further, with continued reference to FIG. 17, the replenisher 200 further includes a side plate detection member 260. The side plate detection member 260 is disposed on the replenisher body 210 and is used for detecting the lane side plate 215 reset to an initial position. Optionally, the side plate detection member 260 may be a proximity switch or a photoelectric sensor. The movable lane side plate 215 has a zero position, that is, its initial position. The side plate detection member 260 belongs to a zero position detection mechanism and is capable of detecting whether the lane side plate 215 is located at the zero position. To achieve the docking of the replenisher 200 with the storage shelf, with continued reference to FIG. 17, the replenisher 200 further includes a lower gate plate member 270. The lower gate plate member 270 is movably disposed at the releasing port 213 and has a gate-open position where the lower gate plate member 270 allows the releasing port 213 to be opened and a gate-close position where the lower gate plate member 270 allows the releasing port 213 to be closed. When the lower gate plate member 270 is in the gate-close position, the goods 12 are limited in the replenishment lane 211 by the lower gate plate member 270. When the lower gate plate member 270 is in the gate-open position, the replenishment lane 211 may be in communication with the storage lane 11 of the storage shelf, and the goods 12 in the replenishment lane 211 may move into the storage lane 11. The widths of the storage lanes 11 of the storage shelf may be inconsistent. The storage lanes 11 may have multiple widths, such as two, three or more widths. Therefore, for ease of description, the storage lanes 11 are divided into narrow lanes and wide lanes. The narrow lane is the narrowest storage lane 11 among all storage lanes 11, and the wide lane is a storage lane 11 with a width greater than the width of the narrow lane. To achieve the docking with storage lanes 11 of different widths, in the width direction of the replenishment lane 211, the lower gate plate member 270 includes a first portion 271 and a second portion 272 connected to each other. In the length direction of the replenishment lane 211, an end of the first portion 271 facing away from the replenisher body 210 protrudes relative to an end of the second portion 272 facing away from the replenisher body 210. That is, the lower gate plate member 270 is divided into two sections in its width direction. Since the lengths of the two sections are different, a notch structure and a flange structure are formed. The flange structure is the portion where the first portion 271 protrudes relative to the second portion 272. The width of the flange structure (that is, the width of the first portion 271) is set to be less than or equal to the width (that is, the width of the narrow lane) of the storage lane 11 having the smallest width. Through the above setting, the flange structure may extend into any storage lane 11 to achieve the docking, and no matter whether the storage lane 11 is a narrow lane or a wide lane, the replenishment may proceed as normal. As shown in FIG. 25, before the replenisher 200 is docked with the storage lane 11 of the storage shelf, the position of the movable lane side plate 215 needs to be adjusted to enable the replenishment lane 211 to squarely face the first portion 271 (this step is generally completed synchronously while the replenisher 200 collects the goods from the buffer storage station 100, for example, while the goods 12 in the replenishment lane 211 are aligned) so that the goods 12 squarely face the first portion 271. If the replenisher 200 is docked with the narrow lane, the flange structure of the first portion 271 extends into the narrow lane to be docked with the narrow lane, and the goods 12 of a smaller width directly pass through the first portion 271 and enter the narrow lane. If the replenisher 200 needs to be docked with the wide lane of the storage lane 11, the first portion 271 may also be docked with the wide lane. When the goods 12 of a larger width pass through the lower gate plate member 270, part of the goods 12 passes through the first portion 271, and the remaining part of the goods 12 passes through the second portion 272. Since the notch structure is formed on the front side of the second portion 272, the goods 12 may need to move over the notch structure to enter the wide lane. However, with the flange structure overlapping the wide lane, the width of the notch formed at the notch structure is generally small, and the resulting small lack of support does not affect the normal sliding of the goods 12. It is to be noted that due to factors such as materials and manual installation, charging ports of the storage lanes 11 may not be horizontally aligned, and thus when the lower gate plate member 270 of the replenisher 200 is docked with a storage lane 11, the lower gate plate member 270 may not be in an ideal docking position with a very small distance. The reason why the front end of the lower gate plate member 270 is designed and the notch structure and the flange structure is to enable the lower gate plate member 270 to be docked with storage lanes 11 of different widths. By designing the flange structure of the lower gate plate member 270 according to the minimum lane width, when the lower gate plate member 270 is docked with the narrow lane, the replenishment may be performed stably; when the lower gate plate member 270 is docked with the wide lane, the normal docking may be achieved, and a small lack of support at the notch structure does not affect the normal sliding of the goods 12. Assuming that the above design is not adopted and only the flange structure with one width is disposed, if the width of the flange structure is designed according to the width of the narrow lane, the goods 12 may fall due to the large gap when the flange structure is docked with the wide lane; if the width of the flange structure is designed according to the width of the wide lane, the lower gate plate member 270 may not be fully opened due to the obstruction of the lane side plate 215 when the flange structure is docked with the narrow lane, thereby affecting the normal movement of the goods 12. In some embodiments, an ejection limit mechanism is disposed on the lane bottom plate 214. The ejection limit mechanism includes a movable limit block 293. An ejection port is disposed at an end of the lane bottom plate 214 close to the releasing port 213. The limit block 293 is movably disposed in the ejection port. The limit block 293 has a limit position protruding out of the lane bottom plate 214 and an avoidance position hidden in the lane bottom plate 214. The limit block 293 in the limit position may restrict the movement of the goods 12 along the inclined replenishment lane 211, and the limit block 293 in the avoidance position may release the restriction on the goods 12. During replenishment, the limit block 293 of the ejection limit mechanism performs a repeating motion to replenish the goods 12 into the storage lane 11 one by one. It is to be noted that the power driving the limit block 293 to be switched between the limit position and the avoidance position may come from a power member capable of outputting linear motion, such as a micro-cylinder. Alternatively, a linkage structure may be disposed between the lower gate plate member 270 and the limit block 293. The linkage structure includes, but is not limited to, a connecting rod structure. When the lower gate plate member 270 is opened, the lower gate plate member 270 drives the limit block 293 to move from the limit position to the avoidance position through the linkage structure. When the lower gate plate member 270 is closed, the lower gate plate member 270 drives the limit block 293 to move from the avoidance position to the limit position through the linkage structure. With continued reference to FIGS. 20 to 22, to drive the lower gate plate member 270, the replenisher 200 further includes a drive assembly 280. The drive assembly 280 includes a drive component 281, a push-pull member 282, and a mounting abutment member 283. The drive component 281 has a telescopic end capable of extending and retracting. The telescopic end of the drive component 281 is connected to the push-pull member 282 and is capable of driving the push-pull member 282 to perform linear motion. The mounting abutment member 283 is disposed on the lower gate plate member 270. When the telescopic end of the drive component 281 extends, the push-pull member 282 pushes the mounting abutment member 283 to enable the lower gate plate member 270 to be switched from the gate-open position to the gate-close position. When the telescopic end of the drive component 281 retracts, the push-pull member 282 pulls the mounting abutment member 283 to enable the lower gate plate member 270 to be switched from the gate-close position to the gate-open position. It is to be noted that one end of the lower gate plate member 270 is rotatably connected to the end of the lane bottom plate 214 close to the releasing port 213 through a hinge member. The lower gate plate member 270 is switched between the gate-open position and the gate-close position by rotating. By driving the push-pull member 282 to perform linear motion through the drive component 281 to push and pull the mounting abutment member 283, the lower gate plate member 270 is capable of being switched between the gate-open position and the gate-close position. Such a linear drive method makes the structure of the drive assembly 280 become compact and occupy less space. The drive component 281 may be a mechanism capable of directly outputting linear motion, such as a cylinder or a linear motor, and may also be a combination of a power component capable of outputting rotational motion and a transmission component capable of converting rotational motion into linear motion, such as the combination of a motor and a pinion and rack or the combination of a motor and a lead screw nut. With continued reference to FIGS. 21 and 22, the push-pull member 282 includes a stud ball 2821. The stud ball 2821 is fixed on the telescopic end of the drive component 281 and abuts against the mounting abutment member 283. When the telescopic end of the drive component 281 extends, the stud ball 2821 moves linearly. It is to be noted that the stud ball 2821 is only used for pushing the mounting abutment member 283 to provide power for flipping the lower gate plate member 270 upward from the gate-open position and switching the lower gate plate member 270 to the gate-close position. When the telescopic end of the drive component 281 retracts, the stud ball 2821 retracts accordingly and is separated from the mounting abutment member 283. Therefore, during the retraction process of the stud ball 2821, the stud ball 2821 does not provide a pulling force for the mounting abutment member 283 and cannot drive the lower gate plate member 270 to be flipped back to the gate-open position. To enable the lower gate plate member 270 to be flipped back to the gate-open position, with continued reference to FIGS. 21 and 22, the push-pull member 282 further includes a reset elastic body 2822 and a fixed plate 2823. The fixed plate 2823 is fixed on the telescopic end of the drive component 281. The reset elastic body 2822 is connected between the mounting abutment member 283 and the fixed plate 2823 and is used for pushing or pulling back the mounting abutment member 283. It is to be noted that the reset elastic body 2822 plays a role in the process of pushing the lower gate plate member 270 to the gate-close position or pulling the lower gate plate member 270 back to the gate-open position. Moreover, when the lower gate plate member 270 is in the gate-open position shown in FIG. 21, the reset elastic body 2822 has a preload. When the lower gate plate member 270 is switched from the gate-open position shown in FIG. 21 to the gate-close position, the preload may first decrease and then increase. With the setting of the reset elastic body 2822, the lower gate plate member 270 may be driven to be opened or closed gently. During the process of driving the lower gate plate member 270 to be flipped upward to be closed and to be flipped downward to be opened, no great mechanical damage is caused to the hinge member that achieves the rotatable connection between the lower gate plate member 270 and the lane bottom plate 214, thereby improving the service life of the hinge member and reducing the cost. The drive assembly 280 drives the lower gate plate member 270 in a flexible and accurate manner, thereby lowering the likelihood of docking failures. Optionally, the reset elastic body 2822 is a tension spring. A first tension spring hole is disposed on the fixed plate 2823, and a second tension spring hole is disposed on the mounting abutment member 283. Both ends of the tension spring are hooked on the first tension spring hole and the second tension spring hole, respectively. When the lower gate plate member 270 is opened, the reset elastic body 2822 is capable of driving the lower gate plate member 270 to be flipped downward to be opened by pulling the mounting abutment member 283, thereby increasing the opening and closing speeds and improving the gate opening accuracy. Further, to prevent the lower gate plate member 270 from being opened excessively, a limit structure is disposed on the lower end of the lane bottom plate 214. When the lower gate plate member 270 is flipped downward to the state shown in FIG. 20, the limit structure may abut against the lower gate plate member 270, thereby preventing the lower gate plate member 270 from continuing to be flipped downward. Optionally, the limit structure may be a block structure or a columnar structure having a limiting effect, and the specific structure of the limit structure is not limited here. With continued reference to FIGS. 19 and 26, the replenisher 200 further includes a goods detection member 292. The goods detection member 292 is disposed on the lower gate plate member 270. When the lower gate plate member 270 is in the gate-close position, the goods detection member 292 faces the storage lane 11 and is used for detecting the inventory of goods 12 in the storage lane 11 to determine whether the storage lane 11 has replenishment requirements. Optionally, the goods detection member 292 is a distance measuring sensor. The distance measuring sensor is mounted on the mounting abutment member 283. When the lower gate plate member 270 is in the gate-close position, the distance measuring sensor is capable of emitting a detection light parallel to the direction of the storage lane 11, and the detection light is emitted into the storage lane 11. It is to be noted that, after the replenisher 200 arrives at a to-be-replenished storage lane 11 on the storage shelf, the situation of the goods 12 in the storage lane 11 needs to be detected by using the distance measuring sensor. The specific detecting manner is to measure whether goods 12 exist within a certain distance by using the distance measuring sensor. If no goods 12 exist, it may be confirmed that the storage lane 11 needs to be replenished. At this point, the lower gate plate member 270 is directly controlled to be opened to form a docking slide, and then replenishment directly starts, thereby ensuring the replenishment accuracy and reducing the probability of wrong replenishment. Moreover, such a design is clever, and no additional movement and positioning are required. If the detected distance is incorrect, for example, if the detected distance is very short, it means that the storage lane 11 is full of goods 12, and the information that the storage lane 11 needs to be replenished is incorrect. With continued reference to FIG. 17, the replenisher 200 further includes a discharging detection member 291. The discharging detection member 291 is disposed on the lower gate plate member 270. Optionally, the detection light emitted by the discharging detection member 291 is perpendicular to the movement direction of the goods 12. The discharging detection member 291 is used for detecting whether the goods 12 are retained at the lower gate plate member 270. Optionally, the discharging detection member 291 is disposed on the inner side of the lower gate plate member 270. The discharging detection member 291 is hidden on the inner side of the lower gate plate member 270 when lower gate plate member 270 is in the gate-close position, and the discharging detection member 291 is exposed when the lower gate plate member 270 is in the gate-open position. Optionally, the discharging detection member 291 is a photoelectric sensor. In addition, the discharging detection member 291 may also be used for counting the goods 12 passing through the lower gate plate member 270 so that the replenisher 200 may stop replenishment after the number of goods replenished to a certain storage lane 11 reaches a desired value and then move to the next replenishment position to replenish another storage lane 11 or return to the buffer storage station 100 to collect goods. With continued reference to FIGS. 13 to 16, at least two replenishers 200 are disposed side-by-side, and the replenishment lane 211 of each replenisher 200 is capable of storing the goods 12. With the setting of at least two replenishers 200, at least two replenishment lanes 211 may exist, thereby improving a goods capacity and replenishment efficiency. It is to be noted that the number of replenishers 200 may be set to two as shown in FIGS. 13 to 16, and may also be set to three, four or more according to requirements. Before the replenisher 200 replenishes a certain storage lane 11 of the storage shelf, the inventory of goods 12 in the storage lane 11 needs to be counted to determine the number of goods to be replenished. To enable the inventory counting of the goods 12 in the storage lane 11, as shown in FIGS. 13, 14, and 27 to 32, the replenishment device further includes an inventory counting device 500. The inventory counting device 500 includes an extendable structure 510 and an inventory counting structure 520. The extendable structure 510 is movably disposed relative to the replenisher 200. Optionally, the extendable structure 510 is movably disposed on the replenisher body 210 or movably disposed on the loading platform 300. The inventory counting structure 520 is disposed at an end of the extendable structure 510. With the movement of the extendable structure 510, the inventory counting structure 520 is capable of entering the storage lane 11 through the lane entrance 101 to count the inventory of the goods 12 in the storage lane 11. Compared to a laser inventory counting method in the related art in which a laser probe emits laser light at the lane entrance to count the inventory of the goods in the storage lane, the inventory counting structure 520 of the inventory counting device 500 provided by the present invention is capable of extending into the storage lane 11 through the lane entrance 101 to carry out detection at a relatively close distance, and thus the impact of the deformation of the storage lane 11 caused by various reasons on the detection may be reduced, that is, in the case of close-distance detection, the correctness of the detection of the target goods 12 may be effectively ensured, thereby improving the accuracy of the inventory counting and significantly reducing the rate of misjudgment. Compared to a manual inventory counting method, the inventory counting structure 520 of the inventory counting device 500 provided by the present invention extends into the storage lane 11 through the lane entrance 101 to perform inventory counting, and thus the goods 12 may be detected more efficiently and more accurately to derive the inventory data. It is to be noted that to obtain the inventory number n of the goods 12, the following parameters are known: 1. the length L of the storage lane 11; 2. the extension distance L1 of the extendable structure 510 when the inventory counting structure 520 detects the goods 12; 3. the length L2 of the goods 12 in the storage lane 11; 4. the distance L3 between the inventory counting structure 520 and the goods 12 when the inventory counting structure 520 detects the goods 12; 5. the distance L4 between the inventory counting structure 520 and the lane entrance 101 when the extendable structure 510 does not extend. Thus, n = (L − L1 + L4 − L3) / L2, and the number N of the goods 12 to be replenished into the lane is L / L2 − n. In an embodiment, the extendable structure 510 is an elongated rod. In an embodiment, the inventory counting structure 520 is one of a laser distance measuring sensor, an infrared distance measuring sensor, a micro switch or a pressure sensor. It is to be noted that the inventory counting structure 520 may also be set as other sensors according to requirements, as long as the inventory counting structure 520 is capable of detecting signals in a short distance. To drive the extendable structure 510 to move, the inventory counting device 500 further includes a telescopic drive member 540. The telescopic drive member 540 is drivingly connected to the extendable structure 510 and used for driving the extendable structure 510 to move in a direction substantially parallel to the extension direction of the storage lane 11. In some embodiments, the telescopic drive member 540 includes a telescopic motor 541 and a synchronous belt structure 542. The synchronous belt structure 542 includes a driving wheel 5421, a driven wheel 5423, and a synchronous belt 5422. The driving wheel 5421 and the driven wheel 5423 are spaced apart and rotatable. The synchronous belt 5422 is sleeved on the driving wheel 5421 and the driven wheel 5423. The motor shaft of the telescopic motor 541 is drivingly connected to the driving wheel 5421. The extendable structure 510 is connected to the synchronous belt 5422 of the synchronous belt structure 542. Of course, in other embodiments, the telescopic drive member 540 may also be other structures capable of outputting linear motion, such as a cylinder, a linear motor, or the combination of a motor and a pinion and rack. To achieve the fixation of the telescopic drive member 540, with continued reference to FIG. 28, the inventory counting device 500 further includes a track member 550 for supporting the extendable structure 510 and allowing the telescopic motor 541 and the synchronous belt structure 542 to be mounted thereon. The extendable structure 510 is movably disposed on the track member 550 and has an extended state in which the extendable structure 510 extends out of the track member 550 and a retracted state in which the extendable structure 510 retracts and overlaps the track member 550. Optionally, the track member 550 is fixed to a lateral side of the replenisher body 210 through multiple L-shaped second mounting plates 584. Optionally, the track member 550 is basically cubic. As shown in FIG. 32, the track member 550 includes a first side plate 554, a first mounting plate 551, a second side plate 555, and a track plate 552 that are connected sequentially. The first side plate 554 and the second side plate 555 are disposed opposite to each other, and the first mounting plate 551 and the track plate 552 are disposed opposite to each other. The height of the first side plate 554 is lower than the height of the second side plate 555 so that an opening is formed between the first side plate 554 and the track plate 552 to allow the synchronous belt structure 542 to be mounted in the space inside of the track member 550. Specifically, the telescopic motor 541 is fixed below the first mounting plate 551, the driving wheel 5421 and the driven wheel 5423 are both rotatably connected to the first mounting plate 551, and the extendable structure 510 is movably disposed on the upper surface of the track plate 552. To improve the movement accuracy of the extendable structure 510, as shown in FIG. 31, the inventory counting device 500 further includes a limit member 583. The limit member 583 is fixedly disposed relative to the replenisher 200. A limit slot 511 is disposed on one of the limit member 583 or the extendable structure 510, and a limit bump is disposed on the other one of the limit member 583 or the extendable structure 510. The limit bump is slidingly limited in the limit slot 511 to guide the extendable structure 510, thereby preventing the extendable structure 510 from swinging from side to side during movement. Optionally, with continued reference to FIG. 32, the track member 550 further includes a third mounting plate 553. The third mounting plate 553 is disposed above the track plate 552, and the limit member 583 is mounted on the third mounting plate 553. Further, optionally, the third mounting plate 553 is L-shaped. Optionally, the track member 550 is an integrally molded piece and is formed into the shape as shown in FIG. 32 by cutting and bending. To enable the extendable structure 510 to better adapt to possible deformations of the storage lane 11, with continued reference to FIG. 28, the inventory counting device 500 further includes a moving member 530 movable relative to the replenisher 200. An end of the extendable structure 510 facing away from the inventory counting structure 520 is rotatably connected to the moving member 530. In an embodiment, with continued reference to FIG. 29, one end of the moving member 530 is fixed to the synchronous belt 5422, and a first hinge mount 581 is formed on the other end of the moving member 530. A second hinge mount 582 is disposed on the end of the extendable structure 510. The first hinge mount 581 and the second hinge mount 582 are hinged through a hinge shaft. In an embodiment, one end of the moving member 530 is fixed to the synchronous belt 5422 through a synchronous belt platen. Through the above setting, the extendable structure 510 may swing up and down at a certain angle in response to possible deformations of the storage lane 11 after the extendable structure 510 extends into the storage lane 11. Therefore, the extendable structure 510 may better adapt to the deformations of the storage lane 11, and the detecting direction of the inventory counting structure 520 may always be a tangential direction parallel to the bottom surface of the storage lane 11, thereby better ensuring the correctness of the detection of targets. With continued reference to FIG. 30, the inventory counting device 500 further includes a first support wheel 560. The first support wheel 560 is rotatably connected to the extendable structure 510, and the first support wheel 560 is rollingly supported on the track plate 552 of the track member 550. By supporting the extendable structure 510 through the first support wheel 560, the stability of the movement of the extendable structure 510 may be improved. Optionally, multiple first support wheels 560 are disposed and are symmetrically arranged on both sides of the extendable structure 510. With continued reference to FIG. 30, the inventory counting device 500 further includes a second support wheel 570. The second support wheel 570 is rotatably connected to the inventory counting structure 520, and the second support wheel 570 is rollingly supported on the track plate 552 of the track member 550. By supporting the inventory counting structure 520 through the second support wheel 570, the inventory counting structure 520 may be supported at a height suitable for detection. With the cooperation of the first support wheel 560 and the second support wheel 570, the extendable structure 510 may remain straight and does not swing downward before the inventory counting structure 520 enters the storage lane 11. It is to be noted that the automatic warehouse further includes a control mechanism. The control mechanism may be a centralized or distributed controller. For example, the controller may be one separate single-chip microcomputer or may be composed of multiple distributed single-chip microcomputers. The single-chip microcomputer may run control programs to control the automatic picking system 10 and the automatic replenishment system 20 to implement their functions. Apparently, the preceding embodiments of the present invention are only illustrative of the present invention and are not intended to limit the implementations of the present invention. Those of ordinary skill in the art can make various apparent modifications, adaptations, and substitutions without departing from the scope of the present invention. All implementations cannot be and do not need to be exhausted here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention fall within the scope of the claims of the present invention.

Claims

1. A buffer storage station, with the characteristic that the buffer storage station includes: a buffer storage rack (110) equipped with an inclined buffer storage track (111), where the buffer storage lane (111) includes a collecting opening (113) located on is in a lower position; and a gate assembly (120) comprising an upper gate plate element (121) which is rotatably connected to the collecting opening (113), where the upper part gate plate element (121) has an open position where the upper gate plate element (121) makes it possible for the collecting opening (113) to be opened and closed where the upper gate plate element (121) allows the collecting opening (113) is closed; where goods (12) in the buffer storage lane (111) successively can pass through the opened collecting opening (113) by gravity, where the gate assembly (120) furthermore an elastic reset device (123) includes that it allows the upper gate plate organ (121) to have a tendency to be reset to the closed position, and where the upper gate plate element (121) is a locking part (1211) and includes a support section (1212) which are connected at an included angle, and where the blocking part (1211) serves to block the collecting opening (113); where the gate assembly (120) further includes a hinge part (122), where the hinge part (122) includes a push plate (1221), which is rotatably connected with the buffer storage rack (110), with the push plate (1221) against the support section (1212) is attached, and where the elastic reset device (123) is connected between the push plate (1221) and the buffer storage rack (110); by applying a force to the push plate (1221) rotates the push plate (1221) in order to enable it upper gate plate element (121) is switched from the closed position to the open position position and to enable the elastic reset device (123) to be compressed become.

2. The buffer storage station according to claim 1, where the buffer storage rack (110) a buffer storage base plate (115) which includes a bottom surface of the buffer forms a storage lane (111), and where an enclosed angle between a wide side of the buffer storage base plate (115) and a horizontal line forms an acute angle.

3. The buffer storage station according to claim 1, where the buffer storage rack (110) is equipped with multiple buffer storage lanes (111), with an upper one gate plate element (121) is placed at a collecting opening (113) of each of the number buffer storage lanes (111), and at least part of a number of upper gate plate elements (121) can be switched to the open position simultaneously.

4. The buffer storage station according to claim 1, where the hinge part (122) further comprises a connecting rod (1222) and a rotating wheel (1223), where the connecting rod (1222) is connected to the push plate (1221), and where the rotating wheel (1223) rotatably connected to the connecting rod (1222), and where the rotating wheel (1223) rolling against the support part (1212).

5. The buffer storage station according to claim 4, where the buffer storage rack (110) is equipped with multiple buffer storage lanes (111), with an upper one gate plate element (121) is placed at a collecting opening (113) of each of the number buffer storage tracks (111), where two rotating wheels (1223) are placed, and where the two rotating wheels (1223) rolling against the support parts (1212) of adjacent two upper gate plate elements (121) respectively abut.

6. A replenishment device marked for collecting goods from the buffer storage station pursuant to one of claims 1 to 5, and comprising: a backfill body (210) equipped with an inclined backfill track (211), where the replenishment lane (211) has a receiving opening (212) at a higher position includes, and where the replenishment device is movable to a replenishment position where the receiving opening (212) directly opposite is directed towards the group opening (113); and a gate push assembly (220), where the gate push assembly (220) in is capable of driving the upper gate plate element (121) in order to be switched from the closed position to the open position, so that the receiving opening (212) is coupled with the collective opening (113).

7. The supplementary device according to claim 6, where the gate assembly (120) furthermore includes a push plate (1221), which is rotatably connected to the buffer storage rack (110) and rests against the upper gate plate element (121); where the gate push assembly (220) a gate push drive device (221) and includes a push mechanism (222), whereby the gate push mechanism (221) is driveable connected to the push mechanism (222) and serves to drive the push mechanism (222) to perform a linear motion, and where the pushing device (222) is capable to push against the push plate (1221) in such a way that the upper gate plate body (121) is moved from the closed position to the open position.

8. The filling device according to claim 6, where the filling body (210) includes a runway base plate (214) which forms a base surface of the backfill runway (211), where the upper gate plate element (121) in the open position is able to the overlapping track base plate (214).

9. The supplementary device referred to in claim 8, where the upper part gate plate element (121) includes a protruding part (12111) that the track base plate (214) overlaps, with the filling device further having an in-position detection element (230) includes, and where the in-position detection element (230) is placed at one end of the track base plate (214) and serves to detect the protruding part (12111).

10. The supplementary device under claim 6, whereby the gate push assembly (220) is capable of at least two upper to drive gate plate elements (121) to simultaneously move from the closed position to the open position to be switched.

11. The filling device according to claim 6, where the filling body (210) comprising a track base plate (214) and two track side plates (215), where the The track base plate (214) and the two track side plates (215) form the backfill track (211), and where at least one of the two trackside plates (215) is movable to the width of to adjust the feed lane (211) and / or to align goods (12) which the enter the filling lane (211).

12. The topping device referred to in claim 11, where the topping device furthermore includes a variable pitch drive unit (240), where the drive unit (240) variable pitch motor (241) includes, a spindle (242) and a nut block (243), with a motor shaft of the variable pitch motor (241) driveable is connected to one end of the spindle (242), where the nut block (243) is threaded and connected to the spindle (242) in order to form a spindle nut pair to be formed with the spindle (242), and where the nut block (243) is connected to a movable track side plate (215); and / or where the supplementary device further includes a side plate detection element (260) includes, and where the side plate detection element (260) is on the filler body (210) placed and serves to detect a trackside plate (215) that has been put back to an initial position.

13. An automatic completion system, characterized by the fact that it automatically replenishment system includes: the buffer storage station according to one of claims 1 to 5; and the supplementary device according to one of claims 6 to 12. FIG.1 FIG.2

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