Barrel cover collecting device matched with collecting frame and collecting method

By designing a combination of the conveying part, the lifting part, the feeding part and the transverse movement part, and utilizing the guiding and supporting function of the protective parts, the automatic collection of the barrel lids is realized, which solves the problem that the existing device requires manual operation and special collection frames, improves space utilization and reduces costs.

CN120793566APending Publication Date: 2025-10-17TAIYUAN FORTUCKY LOGISTICS EQUIP TECH CO LTD
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Patent Information

Application Number
CN202511027385.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-24
Publication Date
2025-10-17

AI Technical Summary

Technical Problem

Existing barrel cover collecting devices require manual operation and use a special collecting frame, resulting in low space utilization and high cost.

Method used

It adopts the combination of conveying part, lifting part, feeding part, transverse moving part and protective part. Through the guiding and supporting function of protective parts, the barrel cover can be stably dropped into the common collection frame. The position of protective parts is adjusted by giving way and replacing parts to realize automatic collection.

Benefits of technology

The practicability of the barrel cover collecting device is improved, the dependence on a special collecting frame is reduced, the space utilization rate of the collecting frame is increased, and the cost is reduced.

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Abstract

The invention relates to a barrel cover collecting device matched with a collecting frame and a collecting method, and relates to the technical field of transfer equipment. A lifting part; a feeding part; the transverse moving part is connected with the feeding part and used for driving the conveying part, the lifting part and the feeding part to move in the horizontal linear direction, and the driving moving direction of the transverse moving part is perpendicular to the driving moving direction of the feeding part; the protection part is located at the end, close to the collecting frame, of the conveying part and comprises a first protection piece and a second protection piece, and in the initial state, the first protection piece and the second protection piece are located on the two sides of the conveying direction of the conveying part correspondingly; the receding part is arranged between the first protection part and the second protection part and used for driving the second protection part to rotate; and the transposition part is arranged on the conveying part, connected with the receding part and used for driving the receding part, the first protection piece and the second protection piece to conduct transposition rotation. The practicability of the barrel cover collecting device can be improved.
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Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transfer equipment, and in particular to a bucket cover collecting device adapted to a collecting frame. BACKGROUND

[0002] A material bucket and a matching bucket cover are a common container combination. In the process of warehouse storage and circulation, the bucket cover needs to be taken off the material bucket, and then the two are classified and collected for circulation.

[0003] In the traditional operation mode, a worker needs to put several bucket covers into a collecting frame one by one. In order to facilitate access, the bucket covers are usually placed vertically. Therefore, the worker usually needs to support the bucket covers placed in the collecting frame to prevent the bucket covers from tipping over.

[0004] In actual collection, some manufacturers use specially designed collecting frames. These specially designed collecting frames are provided with a plurality of support plates to form independent placement spaces, so that the bucket covers can be directly placed and the risk of tipping over of the bucket covers is avoided.

[0005] In the above technical solution, the support plates compress the space in the collecting frame, reducing the number of bucket covers placed, and the cost of the specially designed collecting frame is high, resulting in poor practicability of the current bucket cover transfer and collection device. SUMMARY

[0006] In order to improve the practicability of the bucket cover transfer and collection device, the present application provides a bucket cover collecting device adapted to a collecting frame and a collecting method.

[0007] In a first aspect, the present application provides a bucket cover collecting device adapted to a collecting frame, which adopts the following technical solution: A bucket cover collecting device adapted to a collecting frame, comprising: a conveying part for receiving a bucket cover and transporting the bucket cover into a collecting frame; a lifting part connected with the conveying part and used to drive the conveying part to move in a vertical direction; a feeding part connected with the lifting part and used to drive the conveying part and the lifting part to move in a horizontal linear direction; a transverse moving part connected with the feeding part and used to drive the conveying part, the lifting part and the feeding part to move in a horizontal linear direction, the driving moving direction of the transverse moving part being perpendicular to the driving moving direction of the feeding part; a protection part located at one end of the conveying part close to the collecting frame, the protection part comprising a first protection member and a second protection member, and in an initial state, the first protection member and the second protection member are located on both sides of the conveying direction of the conveying part, respectively; a yielding part arranged between the first protection member and the second protection member and used to drive the second protection member to rotate; The switching part is arranged on the conveying part, and is connected with the giving part and used for driving the giving part, the first protection piece and the second protection piece to rotate.

[0008] By adopting the above technical scheme, the first protection piece and the second protection piece can play a guiding and supporting role during the process that the bucket cover enters the collecting frame from the conveying part, so that the bucket cover can stably fall into the collecting frame. When the first bucket cover falls into the collecting frame, the giving part is started to adjust the position of the second protection piece, so that the switching part can drive the second protection piece to rotate around the first protection piece, thereby facilitating the second protection piece to support and protect the bucket cover placed in the collecting frame, and the collecting device can be applied to common collecting frames, thereby improving the practicability of the bucket cover collecting device.

[0009] Optionally, the giving part comprises: The connecting piece is fixedly connected with the first protection piece at one end; The giving motor is installed at one end of the connecting piece close to the second protection piece, and the output shaft of the giving motor is arranged in parallel with the connecting piece and is perpendicular to the second protection piece.

[0010] Optionally, the switching part is a switching motor, which is arranged on the conveying part, and the output shaft of the switching motor is coaxially arranged with the first protection piece and is fixedly connected with the first protection piece. Optionally, the first protection piece and the second protection piece are both sleeved with an elastic buffer pad.

[0011] By adopting the above technical scheme, when the bucket cover slides between the first protection piece and the second protection piece, the elastic buffer pad tightly abuts against the bucket cover, so that the bucket cover slowly slides into the collecting frame, thereby playing a good protection role on the bucket cover and the collecting frame.

[0012] Optionally, the conveying part comprises: The conveying belt is horizontally arranged and connected with the lifting part, and the conveying belt is fixedly provided with a baffle on both sides; The conveying track is located on the side of the conveying belt close to the collecting frame, and is arranged to be inclined downward along the direction away from the conveying belt, and the conveying track is fixedly connected with the conveying belt.

[0013] Optionally, the transverse moving part comprises a guide rail and a driving vehicle running on the guide rail; the feeding part is a feeding cylinder, and the lifting part is a lifting cylinder.

[0014] In a second aspect, the application provides a bucket cover collecting method suitable for a collecting frame, which adopts the following technical scheme: A bucket cover collecting method suitable for a collecting frame comprises the following steps: S1, base point correction: after the collection frame is in place, the position of the collection frame is scanned and identified, and the conveying part is moved to the initial position of the single-row placement space; S2, preliminary placement: the bucket cover rolls from the conveying track to between the first protective piece and the second protective piece, and slides down into the collection frame; S3, space identification: the distance between the first protective piece and the side wall of the collection frame is detected, and when the detection result is not less than a first preset value, the following steps are continued to be executed; S4, let go of rotation: when the space identification is completed and the first preset value is met, the second protective piece is rotated downward by 90°; S5, change of position rotation: after the let go of rotation is completed, the first protective piece rotates by 90°, and the second protective piece rotates by 90° around the first protective piece; after the change of position rotation is completed, the second protective piece is located below the first protective piece, and the second protective piece and the first protective piece are located on the same side of the conveying part; S6, support rotation: after the change of position rotation is completed, the second protective piece is rotated by 90° toward the direction close to the bucket cover, and after the support rotation is completed, the second protective piece is located directly below the first protective piece; S7, horizontal displacement: after the support rotation is completed, the second protective piece, the first protective piece, and the conveying part are synchronously moved by a preset distance toward the direction close to the placed bucket cover; S8, secondary placement early stage: the conveying part is moved to a new placement position under the action of the horizontal displacement part, and in the movement process of the conveying part, the first protective piece is synchronously rotated by 90°, and the second protective piece is rotated by 90° around the first protective piece, so that the second protective piece continuously protects the bucket cover placed in step S1; S9, secondary placement: the bucket cover rolls from the conveying track to between the first protective piece and the second protective piece, and slides down into the collection frame at the new placement position; after the secondary placement is completed, steps S3-S9 are executed in a loop.

[0015] By adopting the above technical solution, in step S1, after determining that the collection frame is placed, the conveying part is moved to the initial position, which is convenient for the placement of the first bucket cover; in the collection process of the bucket cover, the space in the collection frame gradually decreases, therefore, in step S3, the distance between the first protective piece and the side wall of the collection frame is detected; in the case that the detection result is not less than the first preset value, it is indicated that the space for the position change of the second protective piece is sufficient, therefore, steps S4-S9 are executed in sequence. The horizontal displacement of step S7 is to make the bucket covers in the collection frame closely contact each other, which is beneficial to the space utilization of the collection frame.

[0016] Optionally, in the step S3, when the detection result is not greater than a second preset value, the placement of the single row of bucket covers is completed; when the detection result is between the first preset value and the second preset value, steps S4-S7 are skipped, and the following steps are executed: S10, avoid rotation: after the preliminary placement is completed, the second protective part is rotated upward by 90°; S11, local placement: the conveying part is moved to a safe position away from the bucket cover under the action of the horizontal moving part, after the conveying part is moved to the safe position, the second protective part is rotated downward by 90°, so that the second protective part is arranged opposite to the first protective part; when the second protective part is rotated, the first protective part is rotated synchronously by 90°, and the second protective part is rotated by 90° around the first protective part, so that the second protective part is located directly below the first protective part; S12, local horizontal pushing: the second protective part, the first protective part and the conveying part are synchronously moved by a preset distance towards the direction close to the placed bucket cover; after the local horizontal pushing is completed, steps S8-S9 are executed.

[0017] By adopting the above technical scheme, in the collection process of the bucket cover, the space in the collection frame gradually decreases, when the detection result is between the first preset value and the second preset value, it indicates that the space in the collection frame cannot meet the position change of the second protective part, therefore, steps S10-S12 are adopted to collect the bucket cover; When the detection result is not greater than the second preset value, it indicates that the space of the single row in the collection frame is too small, at this time, the space of the row in the collection frame has completed the task of collecting the bucket cover.

[0018] In summary, the present application includes at least one of the following beneficial technical effects: By setting the protective part, the yielding part, the position changing part and the horizontal moving part, the bucket cover can be placed into a common collection frame, without the use of specially made collection frames, reducing the cost of warehouse process, at the same time, more bucket covers can be stored in the collection frame, improving the space utilization, thereby improving the practicality of the bucket cover collecting device. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic diagram of an embodiment of the present application; Figure 2 is a structural schematic diagram of an embodiment of the present application for displaying the protective part; Figure 3 is a structural schematic diagram of the second protective part located directly below the first protective part; Figure 4 is a structural schematic diagram of an embodiment of the present application for displaying the yielding motor; Figure 5 is a position schematic diagram of the second protective part rotated upward by 90°; Figure 6 is a partial schematic diagram of a safe position in step S11.

[0020] MARKING OF THE DRAWINGS: 1, conveying part; 11, conveying belt; 12, conveying track; 2, lifting part; 3, feeding part; 4, transverse moving part; 41, guide rail; 42, driving vehicle; 5, protection part; 51, first protection piece; 52, second protection piece; 6, yielding part; 61, connecting piece; 62, yielding motor; 7, transposition part. DETAILED DESCRIPTION

[0021] The following will be described in detail in combination with the accompanying drawings. Figures 1-6 The application is further described in detail.

[0022] The application discloses a bucket cover collecting device adapted to a collecting frame, which is used for transferring a bucket cover vertically adsorbed on a suction disc and sequentially collecting the bucket cover into the collecting frame.

[0023] Referring to Figures 1 to 5 A bucket cover collecting device adapted to a collecting frame comprises a conveying part 1, a lifting part 2, a feeding part 3 and a transverse moving part 4, wherein the conveying part 1 is used for receiving a bucket cover and transporting the bucket cover into the collecting frame; the lifting part 2 is connected with the conveying part 1 and is used for driving the conveying part 1 to move along a vertical direction; the feeding part 3 is connected with the lifting part 2 and is used for driving the conveying part 1 and the lifting part 2 to move along a horizontal linear direction; the transverse moving part 4 is connected with the feeding part 3 and is used for driving the conveying part 1, the lifting part 2 and the feeding part 3 to move along a horizontal linear direction, and the driving moving direction of the transverse moving part 4 is perpendicular to the driving moving direction of the feeding part 3.

[0024] The transverse moving part 4 comprises a guide rail 41 and a driving vehicle 42 running on the guide rail 41; the feeding part 3 is a feeding cylinder, and the lifting part 2 is a lifting cylinder, wherein the feeding cylinder is horizontally arranged on the driving vehicle 42, the length direction of the feeding cylinder is perpendicular to the driving direction of the driving vehicle 42, and the fixed end of the feeding cylinder is fixedly connected with the driving vehicle 42; the lifting cylinder is vertically arranged on the driving vehicle 42, and the fixed end of the lifting cylinder is fixedly connected with the movable end of the feeding cylinder.

[0025] The conveying part 1 comprises a conveying belt 11 and a conveying track 12, wherein the conveying belt 11 is horizontally arranged above the lifting cylinder and is fixedly connected with the movable end of the lifting cylinder, and the conveying belt 11 is fixedly provided with a baffle on both sides; the conveying track 12 is located on the side of the conveying belt 11 close to the collecting frame, the conveying track 12 is arranged to be inclined downward along the direction away from the conveying belt 11, and the conveying track 12 is fixedly connected with the conveying belt 11.

[0026] The bottom of the conveying track 12 is provided with a protection part 5, a letting part 6 and a transposition part 7, wherein the protection part 5 comprises a first protection piece 51 and a second protection piece 52, and in the initial state, the first protection piece 51 and the second protection piece 52 are respectively located on both sides of the conveying direction of the conveying part 1; the first protection piece 51 is horizontally arranged and located in the same plane as the conveying direction of the conveying track 12; and in the initial state, the second protection piece 52 is arranged in parallel with the first protection piece 51.

[0027] The first protection piece 51 and the second protection piece 52 are both sleeved with an elastic buffer pad layer.

[0028] The letting part 6 comprises a connecting piece 61 and a letting motor 62, wherein the connecting piece 61 is horizontally arranged between the first protection piece 51 and the second protection piece 52 and is perpendicular to the first protection piece 51; the letting motor 62 is installed at one end of the connecting piece 61 close to the second protection piece 52; the output shaft of the letting motor 62 is arranged in parallel with the connecting piece 61, and the output shaft of the letting motor 62 is arranged perpendicularly to the second protection piece 52; and the output shaft of the letting motor 62 is fixedly connected with the second protection piece 52.

[0029] The transposition part 7 comprises a transposition motor and a connecting rod, wherein the transposition motor is installed on the conveying track 12, and the output shaft of the transposition motor is coaxially arranged with the first protection piece 51; the connecting rod is coaxially arranged with the first protection piece 51 and is fixedly connected with the first protection piece 51 and the output shaft of the transposition motor.

[0030] The embodiment of the application discloses a bucket cover collecting method suitable for a collecting frame.

[0031] Referring to Figures 1 to 6 A bucket cover collecting method suitable for a collecting frame comprises the following steps: S1, base point alignment: after the collecting frame is in place, the position of the collecting frame is scanned and recognized, and the conveying part 1 is moved to the initial position of the single-row placement space; S2, preliminary placement: the bucket cover rolls from the conveying track 12 to the space between the first protection piece 51 and the second protection piece 52 and slides downward into the collecting frame; S3, space recognition: the distance between the first protection piece 51 and the side wall of the collecting frame is detected, and when the detection result is not less than a first preset value, the following step is continued to be executed; S4, letting rotation: when the space recognition is completed and the first preset value is met, the second protection piece 52 is rotated downward by 90°; S5, transposition rotation: after the letting rotation is completed, the first protection piece 51 rotates by 90°, and the second protection piece 52 rotates by 90° around the first protection piece 51; after the transposition rotation is completed, the second protection piece 52 is located below the first protection piece 51, and the second protection piece 52 is located on the same side of the conveying part 1 as the first protection piece 51; S6. Support rotation: After the transposition rotation is completed, the second protective member 52 rotates 90° toward the barrel cover. After the support rotation is completed, the second protective member 52 is located directly below the first protective member 51. S7, horizontal push shift: After the support rotation is completed, the second protective member 52, the first protective member 51, and the conveying part 1 are synchronously moved toward the direction close to the placed barrel cover by a preset distance; S8, early stage of secondary placement: the conveying unit 1 moves to a new placement position under the action of the transverse moving unit 4. During the movement of the conveying unit 1, the first protective member 51 rotates 90° synchronously, and the second protective member 52 rotates 90° around the first protective member 51, so that the second protective member 52 continues to protect the barrel cover placed in step S1; S9, secondary placement: the barrel cover rolls from the conveying track 12 to between the first protective member 51 and the second protective member 52, and slides downward to a new placement position in the collection frame; after the secondary placement is completed, steps S3 to S9 are executed in a loop.

[0032] In step S1, after determining that the collection frame has been placed, the conveying unit 1 is moved to the initial position to facilitate the placement of the first bucket lid. During the collection process of the bucket lids, the space in the collection frame will gradually decrease. Therefore, in step S3, the distance between the first protective member 51 and the side wall of the collection frame is tested. If the test result is not less than a first preset value, it indicates that the space for the position change of the second protective member 52 is sufficient, and steps S4-S9 are executed in sequence. The purpose of the horizontal displacement in step S7 is to make the barrel covers in the collection frame close to each other, which is beneficial to the space utilization of the collection frame.

[0033] In step S3, when the detection result is not greater than the second preset value, the placement of the single row of barrel covers is completed; when the detection result is between the first preset value and the second preset value, steps S4 to S7 are skipped and the following steps are performed: S10, avoidance rotation: after the initial placement is completed, the second protective member 52 is rotated upward by 90°; S11. Partial placement: The conveying portion 1 is moved to a safe position away from the barrel cover under the action of the transverse moving portion 4. After the conveying portion 1 moves to the safe position, the second guard 52 rotates downward 90° so that the second guard 52 is directly opposite the first guard 51. After the second guard 52 completes its rotation, the first guard 51 synchronously rotates 90° and the second guard 52 rotates 90° around the first guard 51 so that the second guard 52 is directly below the first guard 51. S12, partial horizontal pushing: the second protective member 52, the first protective member 51, and the conveying part 1 are synchronously moved toward the direction close to the placed barrel cover by a preset distance; after the partial horizontal pushing is completed, step S8-step S9 are executed.

[0034] In the collecting process of the bucket cover, the space in the collecting frame gradually decreases, and when the detection result is between the first preset value and the second preset value, it is indicated that the space in the collecting frame cannot meet the position change of the second protection piece 52, and therefore the steps S10-S12 are adopted to collect the bucket cover; When the detection result is not greater than the second preset value, it is indicated that the space of the single row in the collecting frame is too small, and at this time the space of the row in the collecting frame has completed the task of collecting the bucket cover.

[0035] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A barrel cover collecting device adapted to a collecting frame, used for transporting barrel covers vertically adsorbed on suction cups and collecting the barrel covers into the collecting frame in sequence, characterized in that: include: A conveying portion (1) is used to receive the barrel cover and transport the barrel cover to a collection frame; A lifting portion (2) is connected to the conveying portion (1) and is used to drive the conveying portion (1) to move in a vertical direction; The feeding portion (3) is connected to the lifting portion (2) and is used to drive the conveying portion (1) and the lifting portion (2) to move along a horizontal straight line direction; A transverse moving portion (4) is connected to the feeding portion (3) and is used to drive the conveying portion (1), the lifting portion (2), and the feeding portion (3) to move in a horizontal straight line direction, wherein the driving moving direction of the transverse moving portion (4) is perpendicular to the driving moving direction of the feeding portion (3); The protection part (5) is located at one end of the conveying part (1) close to the collecting frame. The protection part (5) includes a first protection member (51) and a second protection member (52). In an initial state, the first protection member (51) and the second protection member (52) are respectively located on both sides of the conveying direction of the conveying part (1); A yielding portion (6) is provided between the first protective member (51) and the second protective member (52) and is used to drive the second protective member (52) to rotate; The transposition portion (7) is arranged on the conveying portion (1), is connected to the yielding portion (6), and is used to drive the yielding portion (6), the first protective member (51), and the second protective member (52) to perform transposition rotation. In the transposition state, the second protective member (52) rotates around the first protective member (51).

2. The barrel cover collecting device adapted for the collecting frame according to claim 1, characterized in that: The yield portion (6) includes: A connecting member (61), one end of the connecting member (61) is fixedly connected to the first protective member (51); The yielding motor (62) is mounted on one end of the connecting member (61) close to the second protective member (52), and the output shaft of the yielding motor (62) is arranged parallel to the connecting member (61), and the output shaft of the yielding motor (62) is perpendicular to the second protective member (52).

3. The barrel cover collecting device adapted for the collecting frame according to claim 2, characterized in that: The transposition part (7) is a transposition motor, which is arranged on the conveying part (1). The output shaft of the transposition motor is coaxially arranged with the first protective member (51) and is fixedly connected to the first protective member (51).

4. The barrel cover collecting device adapted for the collecting frame according to claim 3, characterized in that: The first protective member (51) and the second protective member (52) are both sleeved with elastic buffer layers.

5. The barrel cover collecting device adapted for the collecting frame according to claim 1, characterized in that: The conveying part (1) comprises: The conveyor belt (11) is horizontally arranged and connected to the lifting part (2), and baffles are fixedly arranged on both sides of the conveyor belt (11); The conveying track (12) is located on a side of the conveying belt (11) close to the collecting frame. The conveying track (12) is arranged to be inclined downward in a direction away from the conveying belt (11). The conveying track (12) is fixedly connected to the conveying belt (11).

6. The barrel cover collecting device adapted for the collecting frame according to claim 4, characterized in that: The transverse moving part (4) includes a guide rail (41) and a driving vehicle (42) running on the guide rail; the feeding part (3) is a feeding cylinder, and the lifting part (2) is a lifting cylinder.

7. A barrel cover collection method adapted for a collection frame, based on the barrel cover collection device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Base point calibration: After the collection frame is in place, the position of the collection frame is scanned and identified, and the conveying part (1) is moved to the initial position of the single-row placement space; S2, initial placement: the barrel cover rolls from the conveying track (12) to between the first protective member (51) and the second protective member (52), and slides downward into the collection frame; S3, space identification: detecting the distance between the first protective member (51) and the side wall of the collection frame, and when the detection result is not less than a first preset value, continuing to perform the following steps; S4, yielding rotation: when the space recognition is completed and the first preset value is met, the second protective member (52) is rotated downward by 90°; S5, transposition rotation: after the transposition rotation is completed, the first protective member (51) rotates 90 degrees, and the second protective member (52) rotates 90 degrees around the first protective member (51); after the transposition rotation is completed, the second protective member (52) is located below the first protective member (51), and the second protective member (52) and the first protective member (51) are located on the same side of the conveying portion (1); S6, support rotation: after the transposition rotation is completed, the second protective member (52) is rotated 90 degrees toward the direction close to the barrel cover. After the support rotation is completed, the second protective member (52) is located directly below the first protective member (51); S7, horizontal push shift: after the support rotation is completed, the second protective member (52), the first protective member (51), and the conveying portion (1) are synchronously moved a preset distance toward the direction close to the placed barrel cover; S8, early stage of secondary placement: the conveying part (1) moves to a new placement position under the action of the transverse moving part (4), and during the movement of the conveying part (1), the first protective member (51) synchronously rotates 90°, and the second protective member (52) rotates 90° around the first protective member (51), so that the second protective member (52) continuously protects the barrel cover placed in step S1; S9, secondary placement: the barrel cover rolls from the conveying track (12) to between the first protective member (51) and the second protective member (52), and slides downward to a new placement position in the collection frame; after the secondary placement is completed, steps S3 to S9 are executed in a loop.

8. The barrel lid collection method adapted for a collection frame according to claim 7, characterized in that: In step S3, when the detection result is not greater than the second preset value, the placement of the single-row barrel lids is completed; when the detection result is between the first preset value and the second preset value, steps S4 to S7 are skipped and the following steps are performed: S10, avoidance rotation: after the initial placement is completed, the second protective member (52) is rotated upward by 90°; S11, local placement: the conveying part (1) moves to a safe position away from the barrel cover under the action of the transverse moving part (4), and after the conveying part (1) moves to the safe position, the second protective member (52) rotates downward by 90 degrees, so that the second protective member (52) and the first protective member (51) are arranged opposite each other; when the second protective member (52) completes the rotation, the first protective member (51) rotates synchronously by 90 degrees, and the second protective member (52) rotates around the first protective member (51) by 90 degrees, so that the second protective member (52) is located directly below the first protective member (51); S12, partial horizontal pushing: the second protective member (52), the first protective member (51), and the conveying portion (1) are synchronously moved a preset distance toward the direction close to the placed barrel cover; after the partial horizontal pushing is completed, steps S8 to S9 are executed.