A continuous liquor packaging method using an upturned lid packaging box

Abstract

The present application relates to a kind of continuous liquor packaging work method using flip-top packaging box, comprising the following steps: (1) liquor box distance transmission;(2) liquor box is embedded in liquor box positioning transmission mechanism after distance separation two sides;(3) liquor box is opened by following opening mechanism;(4) liquor bottle conveyor belt drives liquor bottle movement;(5) liquor bottle is grabbed into box mechanism and is rotated and placed into liquor box (6) following buckle;(7) finished product output.In the step of opening and closing liquor box, following mechanism is used to move synchronously with liquor box, and opening and closing are carried out, effectively protect liquor box structure, effectively avoid the problem of box body damage caused by mechanical action, and the original liquor box positioning transmission mechanism is used, accurate positioning in liquor box transmission is guaranteed, so that opening, bottle, closing mechanism can be accurately matched with the positioning of liquor box, accurate transmission is realized, accurate opening and closing are realized, packaging quality is guaranteed, liquor box damage is avoided, and processing efficiency is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of automation equipment, and relates to a liquor packaging process, in particular to a continuous liquor packaging method using an upturned lid packaging box. BACKGROUND

[0002] With the continuous improvement of the performance of automation equipment, the production line capacity of the liquor production industry is continuously improved, and the speed of the production line has been greatly improved. The demand for automated packaging equipment is increasing. There are various packaging boxes for wine, among which the flip-top packaging box has a folding structure in the box cover. The packaging machine needs to open the box cover, load the bottle, buckle the cover, and insert the tongue. The paper box itself is delicate but fragile. The existing equipment sets a fixed point station on the continuous conveying line of the wine box to perform a series of actions such as fixed-point opening, bottle loading, and cover buckling. During the process, the wine box is continuously conveyed, and the cooperation precision of the fixed-point mechanical hand and the wine box is difficult to accurately cooperate, especially in the opening and buckling process steps, which can easily cause the box body wound to be crushed by the tongue, causing the package to be damaged. SUMMARY

[0003] The present application aims to overcome the shortcomings of the prior art and provide a continuous liquor packaging method using an upturned lid packaging box, which is designed scientifically, has a reasonable structure, and is safe and reliable.

[0004] The present application solves the technical problem by adopting the following technical scheme:

[0005] A continuous liquor packaging method using an upturned lid packaging box, characterized by comprising the following steps:

[0006] (1) wine box input, the wine box conveying belt drives the wine box to move, and after being separated by a double screw mechanism at a certain distance, the wine box continues to convey along the wine box conveying belt;

[0007] (2) after being separated at a certain distance, the wine box is inserted between the guards of the wine box positioning conveying mechanism on both sides, and the guards on the front and back sides and the wine box conveying belt at the bottom jointly push the wine box to move;

[0008] (3) the wine box passes through the follow-up opening mechanism to open the box cover;

[0009] (4) wine bottle input, the wine bottle conveying belt drives the wine bottle to move, and the wine bottle is separated at equal intervals by a double screw distance bottle separation feeding mechanism;

[0010] (5) the wine bottle grabbing into the box mechanism grabs the wine bottle after being separated at equal intervals from the wine bottle conveying belt, lifts the wine bottle upwards and synchronously rotates and moves until it moves downwards to the position above the wine box conveying belt, and then puts the wine bottle into the wine box;

[0011] (6) The wine box after being loaded into the wine bottle moves through the automatic capping mechanism to tighten the box cover;

[0012] (7) Product detection and output.

[0013] Moreover, in step (1), clamping belts are installed on both sides of the wine box conveying belt before the wine boxes are separated at a fixed distance. The clamping belts limit the passing of the wine boxes by clamping or loosening.

[0014] Moreover, in step (3), the automatic uncapping mechanism uses a rotary conveying mechanism to move the uncapping suction disc. The uncapping suction disc has the same speed as the wine box conveying speed, and the uncapping suction disc and the wine box are relatively stationary in the conveying direction. Only vertical relative motion exists between the uncapping suction disc and the wine box. After the box cover is opened, the uncapping mechanism rotates to continue processing the next wine box on the wine box input belt.

[0015] Moreover, in step (6), the automatic capping mechanism uses a rotary conveying mechanism to move the capping pressure head. The capping pressure head has the same speed as the wine box conveying speed, and the capping pressure head and the wine box are relatively stationary in the conveying direction. Only vertical relative motion exists between the capping pressure head and the wine box. After the box cover is pressed and tightened, the uncapping mechanism rotates to queue and wait for the next wine box on the wine box input belt.

[0016] Moreover, the conveying directions of the wine box conveying belt and the wine bottle conveying belt are opposite, and the total amount of feeding per unit of time is the same. The moving speeds of the wine bottle grabbing and box positioning conveying mechanisms are the same, and the running directions are opposite.

[0017] Moreover, the automatic uncapping mechanism includes a layer plate, an axle, an uncapping chain, a stand, a guide block, a suction disc, and an uncapping ring track. The upper and lower layer plates are spaced apart and correspondingly arranged. Two vertical axles are installed on the lateral sides between the upper and lower layer plates. Chain wheels are installed on the upper and lower sides of the axles. Uncapping chains are installed on the upper and lower axles. The upper and lower uncapping chains rotate synchronously. A plurality of stands are installed on the outer periphery between the upper and lower layer plates. The upper and lower ends of the stands are fixed to the chain links of the uncapping chains through connecting plates. Guide blocks are slidably installed on the stands. Suction disc fixing rods are installed on the front lower ends of the guide blocks. Suction discs are installed on the lower ends of the suction disc fixing rods. An uncapping ring track is fixed between the upper and lower layer plates. The ring track has a downward concave arc at the uncapping station. The rear ends of the guide blocks are slidably supported in the uncapping ring track.

[0018] Moreover, the follow-up buckle cover mechanism comprises a rack, a first track, a second track, a tongue pressing assembly, a tongue pressing block, a buckle pressing assembly, a buckle pressing head, a servo motor and a limiting plate, the second track and the first track are installed in the rack in an upper-lower interval, the first track and the second track are both annular tracks, a plurality of tongue pressing assemblies are movably installed in the first track in a limiting mode, and the lower end of each tongue pressing assembly is fixedly connected with a tongue pressing block; a plurality of buckle pressing assemblies are movably installed in the second track in a limiting mode, and the lower end of each buckle pressing assembly is fixedly connected with a buckle pressing head; the buckle pressing assembly and the tongue pressing assembly are one-to-one corresponding and synchronously movable; the servo motor is installed at the upper end of the rack and drives the buckle pressing assembly and the tongue pressing assembly to synchronously move along the respective tracks; and a limiting plate is installed at the lower part of one side of the rack and used for limiting the box cover of the wine box.

[0019] Moreover, the wine box positioning and conveying mechanism comprises a wine box conveying frame, wine box driving chains, a guard plate support, a guard plate, a stop block and a stop rod, the wine box conveying frame is a long strip-shaped mechanism arranged at one side of the wine box conveying belt, the wine box conveying frame is parallel to the wine box conveying belt, two parallel and interval wine box driving chains are arranged in the wine box conveying frame and synchronously movable, a plurality of guard plate supports are uniformly and interval installed on the wine box driving chains, the upper and lower ends of the guard plate support are respectively fixedly connected with corresponding chain links of the upper and lower wine box driving chains, a guard plate is fixedly connected with the middle part of the guard plate support and extends in a cantilever mode, a stop block is fixedly connected with the middle part of the chain link between adjacent guard plate supports, and a limiting step is arranged on the stop block; and a stop rod is transversely fixedly connected with the upper and lower sides between the guard plates, and the two ends of the stop rod extend to the outer sides of the stop blocks and can abut against the limiting steps of the stop blocks.

[0020] The advantages and positive effects of the present application are as follows:

[0021] The whole design of the technical solution is reasonable, the follow-up type mechanism which synchronously moves with the wine box is adopted in the steps of opening the wine box and buckling the cover of the wine box, the wine box is opened and buckled, the structure of the wine box is effectively protected, the problem that the mechanical action causes damage to the box body is effectively avoided, the unique wine box positioning and conveying mechanism is adopted, the accuracy in conveying the wine box is ensured, the opening and buckling mechanism can accurately cooperate with the positioning of the wine box, accurate conveying and opening and buckling are realized, the packaging quality is ensured, the wine box is prevented from being damaged, and the processing efficiency is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a process step schematic diagram.

[0023] Figure 2 It is an opening mechanism structure schematic diagram.

[0024] Figure 3 It is a buckle cover mechanism structure schematic diagram.

[0025] Figure 4It is a schematic view of the wine box positioning and conveying mechanism structure.

[0026] Figure 5 It is Figure 4 It is a partial enlarged view of E part in

[0027] Reference signs:

[0028] 101, layer plate; 102, wheel shaft; 103, cover opening chain; 104, guide block; 105, stand; 106, ring track; 107, suction cup fixing rod; 108, suction cup; 109, motor reducer;

[0029] 801, rack; 802, tongue pressing assembly; 803, first track; 804, cover pressing assembly; 805, second track; 806, servo motor; 807, limiting plate; 808, cover pressing head; 809, tongue pressing block;

[0030] 901, wine box conveying frame; 902, guard plate; 903, guard rail; 904, wine box driving chain; 905, stop block; 906, stop rod; 907, guard plate support. DETAILED DESCRIPTION

[0031] The application will be further described in conjunction with the drawings and specific embodiments, the following examples are only descriptive, not restrictive, and cannot limit the protection scope of the application.

[0032] For ease of description, in the embodiment, the opening end of the large bottom cover plate is taken as the front end of the mechanism, the relative position in the horizontal direction is described as the rear end, and the left and right sides are described as the transverse sides.

[0033] A continuous liquor packaging method using an upturned cover packaging box, comprising the following steps:

[0034] The wine boxes are input one by one into the wine box conveying belt, the friction between the wine box conveying belt and the bottom of the wine box drives the wine box to move, and the wine box continues to be conveyed along the wine box conveying belt after being separated at the same interval by the double screw mechanism. In order to prevent the wine boxes from being stacked too tightly and affecting the interval separation, clamping belts are installed on both sides of the wine box conveying belt before the interval separation, and the clamping belts limit the passage of the wine boxes by clamping or loosening the interval.

[0035] The wine boxes after interval separation are embedded between the guard plates of the wine box positioning and conveying mechanism, and the guard plates on the front and back sides and the wine box conveying belt on the bottom jointly push the wine boxes to move, and the wine box positioning and conveying mechanism can further accurately control the position of the wine boxes during conveying.

[0036] The wine box is opened by a following opening cover mechanism. The following opening cover mechanism uses a rotary conveying mechanism to drive the opening cover suction cup to move. The opening cover suction cup and the wine box have the same conveying speed. The opening cover suction cup and the wine box are relatively static in the conveying direction. There is only vertical relative motion between the opening cover suction cup and the wine box. After the box cover is opened, the opening cover mechanism rotates to continue processing the next wine box on the input belt.

[0037] The wine bottle is input. The wine bottle enters the wine bottle conveying belt. After being separated by the double-screw fixed-distance bottle separation feeding mechanism, the wine bottle continues to move by relying on the friction between the bottom of the wine bottle and the wine bottle conveying belt.

[0038] The wine bottle grabbing and boxing mechanism grabs the wine bottle from the wine bottle conveying belt, then lifts the wine bottle and rotates, reaches the wine bottle conveying belt, and then lowers the gripper to put the wine bottle into the corresponding opened wine box. The conveying direction of the wine bottle conveying belt is opposite to that of the wine bottle conveying belt. The moving speed of the wine bottle grabbing and boxing mechanism and the wine box positioning and conveying mechanism is the same, and the running direction is opposite.

[0039] After the wine bottle is loaded, the wine box continues to be conveyed, and the box cover is buckled by a following buckling cover mechanism. The following buckling cover mechanism uses a rotary conveying mechanism to drive the buckling cover pressure head to move. The buckling cover pressure head and the wine box have the same conveying speed. The buckling cover pressure head and the wine box are relatively static in the conveying direction. There is only vertical relative motion between the buckling cover pressure head and the wine box. After the box cover is buckled, the opening cover mechanism rotates to continue processing the next wine box on the input belt.

[0040] Output. The finished product is detected and enters the finished product output belt. The unqualified product is shunted to the unqualified product channel and waits for manual processing.

[0041] See the attached Figure 2As shown, the following cover opening mechanism includes a layer plate 101, an axle 102, a cover opening chain 103, a column 105, a guide block 104, a suction cup 108, and a cover opening ring track 106. The upper and lower layer plates 101 are correspondingly arranged at intervals. Two vertical axles 102 are installed at intervals on the lateral sides between the upper and lower layer plates 101. Chain wheels are installed on the upper and lower sides of the axles 102. The cover opening chains 103 on the upper and lower sides are correspondingly installed on the axles 102 and rotate synchronously. A plurality of columns 105 are installed at intervals on the outer periphery between the upper and lower layer plates 101. The upper and lower ends of the columns 105 are fixedly connected to the links of the cover opening chains 103 through connecting plates. The guide blocks 104 are slidingly installed on the columns 105. The suction cup 108 fixing rod 107 is installed on the front lower end of the guide block 104. The upper end of the suction cup 108 fixing rod 107 is connected to an air pipe. The lower end of the suction cup 108 fixing rod 107 is installed with a suction cup 108. A cover opening ring track 106 is fixedly installed between the upper and lower layer plates 101. The ring track 106 is concave downward at the cover opening position. The rear end of the guide block 104 is slidingly and limitingly supported in the cover opening ring track 106. The column 105 moves with the cover opening chain 103, thereby driving the guide block 104 to move along the ring track 106.

[0042] Referring to the drawings Figure 3 As shown, the following cover opening mechanism includes a layer plate 101, an axle 102, a cover opening chain 103, a column 105, a guide block 104, a suction cup 108, and a cover opening ring track 106. The upper and lower layer plates 101 are correspondingly arranged at intervals. Two vertical axles 102 are installed at intervals on the lateral sides between the upper and lower layer plates 101. Chain wheels are installed on the upper and lower sides of the axles 102. The cover opening chains 103 on the upper and lower sides are correspondingly installed on the axles 102 and rotate synchronously. A plurality of columns 105 are installed at intervals on the outer periphery between the upper and lower layer plates 101. The upper and lower ends of the columns 105 are fixedly connected to the links of the cover opening chains 103 through connecting plates. The guide blocks 104 are slidingly installed on the columns 105. The suction cup 108 fixing rod 107 is installed on the front lower end of the guide block 104. The upper end of the suction cup 108 fixing rod 107 is connected to an air pipe. The lower end of the suction cup 108 fixing rod 107 is installed with a suction cup 108. A cover opening ring track 106 is fixedly installed between the upper and lower layer plates 101. The ring track 106 is concave downward at the cover opening position. The rear end of the guide block 104 is slidingly and limitingly supported in the cover opening ring track 106. The column 105 moves with the cover opening chain 103, thereby driving the guide block 104 to move along the ring track 106.

[0043] The driving structure in the rack 801 is similar to the driving mechanism of the follow-up cover opening mechanism. The rack 801 comprises upper and lower layers of layer plates 101, which are correspondingly arranged at intervals. Two vertically arranged wheel shafts 102 are installed at intervals on the lateral sides between the upper and lower layer plates 101. Chain wheels are installed on the upper and lower sides of the wheel shafts 102. The upper and lower wheel shafts 102 are correspondingly installed with cover opening chains 103, which rotate synchronously. A plurality of vertical columns 105 are installed at intervals on the outer periphery between the upper and lower layer plates 101. The upper and lower ends of the vertical columns 105 are respectively fixed to the links of the cover opening chains 103 through connecting plates. The same group of cover pressing assembly 804 and the tongue pressing assembly 802 are coaxially and slidingly sleeved on the same vertical column 105, so as to synchronously move with the vertical column 105. A limiting plate 807 is installed at the lower part of one side of the rack 801. The limiting plate 807 is used for limiting the box cover of the wine box. The wine box is guided to pass through the limiting plate 807. The tongue pressing block 809 cooperates with the limiting plate 807 to insert the tongue into the box body. Then, the cover pressing head 808 tightly buckles the box cover. The limiting plate 807 is parallelly arranged with the first track 803 above it. When the wine box is conveyed to pass through the position of the limiting plate 807 by the conveying mechanism, the conveying direction is parallel to the limiting plate 807. The limiting plate 807 comprises a limiting plate 807 support and a side plate. The height of the limiting plate 807 is the same as the height of the tongue. The length of the limiting plate 807 covers three stations. The three stations correspond to the entry of the tongue into the limiting plate 807, the abutment of the tongue pressing block 809 to the tongue, and the pressing of the tongue pressing block 809 to the tongue to form a right-angle crease, respectively. The fourth station separates the tongue from the limiting plate 807, and the cover pressing block is lowered at this time.

[0044] In order to avoid confusion in the drawings, only part of the tongue pressing assembly 802 and the cover pressing assembly 804 are shown in the drawings of the embodiment. In actual use, the tongue pressing assembly 802 and the cover pressing assembly 804 are correspondingly installed on each group of guide rods.

[0045] Referring to the drawings, Figure 4 , 5As shown, the wine box positioning and conveying mechanism comprises a wine box conveying frame 901, a wine box driving chain 904, a guard plate 902 support, a guard plate 902, a stop block 905 and a stop rod 906. The wine box conveying frame 901 is a long strip-shaped mechanism arranged on one side of the wine box input belt 1. The wine box conveying frame 901 is parallel to the wine box input belt 1. Two parallel and spaced wine box driving chains 904 are arranged in the wine box conveying frame 901 and move synchronously. A plurality of guard plate 902 supports are uniformly and spacedly arranged on the wine box driving chains 904. The upper and lower ends of the guard plate 902 support are fixedly connected to the corresponding chain links of the upper and lower wine box driving chains 904, respectively. The guard plate 902 is fixedly arranged on the middle part of the guard plate 902 support in a cantilevered manner. The guard plate 902 is a vertical plate structure. The interval between adjacent guard plates 902 matches the width of the wine box. The guard plate 902 clamps the wine box on the input and output sides during operation. A guardrail 903 is arranged on the other side of the wine box input belt 1. The guardrail 903 and the guard plate 902 jointly limit and support the wine box and fix the position of the wine box.

[0046] A stop block 905 is fixedly arranged in the middle part of the chain link between adjacent guard plate 902 supports. A limiting step is arranged on the stop block 905. A stop rod 906 is transversely fixedly arranged on the upper and lower sides between the guard plates 902. The two ends of the stop rod 906 extend to the outer sides of the stop block 905 and can abut against the limiting step of the stop block 905. The limiting steps on the upper and lower sides are symmetrically arranged. Through the cooperation of the stop rod 906 and the stop block 905, the shaking of the guard plate 902 caused by the shaking of the chain link in the chain transmission can be effectively eliminated, so as to ensure the accurate positioning and transmission of the wine box.

[0047] Although the embodiments of the present application and the drawings are disclosed for the purpose of illustration, those skilled in the art can understand that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present application and the appended claims. Therefore, the scope of the present application is not limited to the disclosed content of the embodiments and the drawings.

Claims

1. A continuous packaging method for liquor using a top-opening packaging box, characterized in that: Includes the following steps: (1) Wine box input: The wine box conveyor belt drives the wine box to move. After passing through the same distance between the fixed intervals of the twin screw mechanism, the wine box continues to be conveyed along the wine box conveyor belt. (2) After the fixed-distance separation, the two sides of the wine box are embedded between the protective plates of the wine box positioning and conveying mechanism. The protective plates on the front and rear sides and the wine box conveyor belt at the bottom work together to push the wine box to move. (3) The wine box opens its lid via a follow-up opening mechanism; (4) Bottle input: The bottle conveyor belt drives the bottles to move and they are distributed at equal intervals by the twin-screw fixed-distance bottle feeding mechanism. (5) The bottle grabbing and boxing mechanism grabs the bottles after they have been divided at equal intervals from the bottle conveyor belt, lifts the bottles up and rotates them synchronously until they are above the box conveyor belt and then moves them down to put them into the box. (6) After the wine box is filled with wine, it moves and the lid is fastened by a follow-up lid-fastening mechanism. The follow-up lid-fastening mechanism includes a frame (801), a first track (803), a second track (805), a folding tongue pressing assembly (802), a folding tongue pressing block (809), a lid-fastening pressing assembly (804), a lid-fastening pressing head (808), a servo motor (806), and a limiting plate (807). The frame (801) is equipped with a second track (805) and a first track (803) that are spaced apart vertically. Both the first track (803) and the second track (805) are circular tracks (106). Multiple folding tongue pressing assemblies are installed in the first track (803) for limiting movement. The component (802) has a folding tongue pressing component (802) with a folding tongue pressing block (809) fixedly installed at its lower end; multiple lid pressing components (804) are installed in the second track (805) for limiting movement, and a lid pressing head (808) is fixedly installed at the lower end of the lid pressing component (804); the lid pressing components (804) and the folding tongue pressing components (802) correspond to each other and move synchronously; a servo motor (806) is installed at the upper end of the frame (801) to drive the lid pressing components (804) and the folding tongue pressing components (802) to move synchronously along their respective tracks; a limiting plate (807) is installed on the lower part of one side of the frame (801) to limit the lid of the wine box; (7) Finished product inspection and output.

2. The continuous liquor packaging method using a flip-top packaging box according to claim 1, characterized in that: In step (1), clamping belts are installed on both sides of the wine box conveyor belt before the fixed-distance separation. The clamping belts restrict the passage of the wine boxes by clamping or loosening the spacing.

3. The continuous liquor packaging method using a flip-top packaging box according to claim 1, characterized in that: In step (3), the follow-up opening mechanism uses a rotary conveying mechanism to drive the opening suction cup to move. The opening suction cup and the wine box are conveyed at the same speed. The opening suction cup and the wine box are relatively stationary in the conveying direction. There is only vertical relative movement between the opening suction cup and the wine box. After the lid is opened, the opening mechanism rotates and continues to process the next wine box to be processed on the wine box input belt that corresponds to it.

4. The continuous liquor packaging method using a flip-top packaging box according to claim 1, characterized in that: In step (6), the follow-up capping mechanism uses a rotary conveyor to drive the capping head to move. The capping head and the wine box are conveyed at the same speed. The capping head and the wine box are relatively stationary in the conveying direction. There is only vertical relative movement between the capping head and the wine box. After the cap is pressed and fastened, the follow-up capping mechanism rotates and continues to process the next wine box to be processed on the wine box input belt that corresponds to it.

5. The continuous liquor packaging method using a flip-top packaging box according to claim 1, characterized in that: The conveyor belt for wine boxes and the conveyor belt for wine bottles move in opposite directions, but the total amount of material fed per unit time is the same; the wine bottle gripping and box-entry mechanism and the wine box positioning and conveying mechanism move at the same speed but in opposite directions.

6. The continuous liquor packaging method using a flip-top packaging box according to claim 1, characterized in that: The follow-up opening mechanism includes a shelf (101), axles (102), an opening chain (103), a column (105), a guide block (104), a suction cup (108), and an opening ring track (106). The upper and lower shelf plates (101) are arranged at intervals. Two vertically arranged axles (102) are installed at intervals on both sides of the horizontal axis between the upper and lower shelf plates (101). Sprockets are installed on both the upper and lower sides of the axles (102). The opening chains (103) are respectively installed on the upper and lower axles (102). The opening chains (103) of the upper and lower layers rotate synchronously. Multiple columns (105) are evenly distributed around the outer perimeter of the column (105). The upper and lower ends of the column (105) are fixed to the links of the opening chain (103) by connecting plates. Guide blocks (104) are slidably installed on the column (105). A suction cup (108) fixing rod (107) is installed at the lower front end of the guide block (104). A suction cup (108) is installed at the lower end of the suction cup (108) fixing rod (107). An opening ring track (106) is fixed between the upper and lower layers (101). The ring track (106) has a downward concave arc at the opening position. The rear end of the guide block (104) is slidably limited and supported in the opening ring track (106).

7. The continuous liquor packaging method using a flip-top packaging box according to claim 1, characterized in that: The wine box positioning and conveying mechanism includes a wine box conveyor frame (901), a wine box drive chain (904), a guard plate (902) bracket, a guard plate (902), a stop block (905), and a stop bar (906). The wine box conveyor frame (901) is a long strip-shaped mechanism set on one side of the wine box conveyor belt (1). The wine box conveyor frame (901) is parallel to the wine box conveyor belt (1). Inside the wine box conveyor frame (901), there are two parallel and synchronously moving wine box drive chains (904). Multiple guard plate (902) brackets are evenly spaced on the wine box drive chain (904). The upper and lower ends of the guard plate (902) bracket are respectively fixed to the corresponding links on the upper and lower wine box drive chains (904). A cantilevered guard plate (902) is fixed in the middle of the guard plate (902) bracket. A stop block (905) is fixed in the middle of the links between adjacent guard plate (902) brackets. A limiting step is made on the stop block (905). A stop bar (906) is horizontally fixed on the upper and lower sides between the guard plates (902). The two ends of the stop bar (906) extend to the two outer sides of the stop block (905) and can abut against the limiting step of the stop block (905).

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