Automatic cap feeding and screwing machine

Abstract

The invention discloses an automatic cap feeding and screwing machine which comprises a rack, a feeding conveying belt, a cap screwing mechanism, a rotating disc, a cap feeding mechanism, a cap pressing mechanism and a discharging conveying belt. A plurality of bottle clamping grooves penetrating through the upper end and the lower end of the rotating disc are formed in the side wall of the rotating disc, a feeding conveying belt and a discharging conveying belt which are used for conveying bottles are installed on the machine frame, the motion trails of the bottle clamping grooves sweep over the upper portion of the feeding conveying belt and the upper portion of the discharging conveying belt, and a supporting plate is installed on the machine frame and located below the rotating disc. The feeding conveying belt, the cap screwing mechanism, the rotating disc, the cap conveying mechanism, the cap pressing mechanism and the discharging conveying belt are matched, so that the device can achieve automatic conveying of caps and bottles, the bottles can be automatically covered with the caps, the caps can be automatically screwed, the automation degree of the device is high, and the production efficiency can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging, in particular to the technical field of automatic capping and screwing machines. Background Art

[0002] When bottled materials are produced, the bottle caps need to be tightened on the bottles to complete the production. At present, most of the bottle caps are tightened manually. Due to the large number of beverage bottles produced, manual tightening can easily cause arm soreness and affect subsequent work efficiency. After the bottle caps are tightened, the bottles need to be placed in the collection container by hand, which is more troublesome to operate. Therefore, a capping machine is needed. The capping machine is a machine that screws the caps on the target bottles. The traditional capping machine needs to be manually capped when in use, and the use effect is average.

[0003] Existing patent CN119797253A discloses a vertical capping machine with a capping function. The horizontal linear motor moves the vertical vacuum rubber plug to the top of the storage component. At this time, the vertical electric push rod extends, causing the limit arc plate to move downward, and the two auxiliary linear motors move synchronously to push the bottle cap to the bottom of the vertical vacuum rubber plug. At this time, the auxiliary electric push rod slowly contracts and the vertical electric push rod slowly extends, causing the vertical vacuum rubber plug to press against the bottle cap. The vertical vacuum rubber plug is then vacuumed to achieve suction and fixation of the bottle cap. The vertical electric push rod then contracts and resets, and the horizontal linear motor moves and resets, thereby achieving cap removal and capping. The mechanism structure for cap removal and capping is relatively complex, and the process of cap removal and capping is relatively cumbersome, which is not conducive to improving production efficiency.

[0004] Existing patent CN120039809A discloses an automatic capping device for juice filling, comprising a support base, a capping mechanism, a capping mechanism and an adjusting mechanism, wherein the support base is movably provided with two symmetrical limit bars, and the two limit bars are symmetrically fixedly connected to the upper surface of the support frame, the support frame is arranged on the inner side of the support base, and the support frame is movably provided with a capping mechanism for tightening the bottle cap of the canned juice, a cylinder is fixedly mounted on the upper surface of the support base, and the lower end of the cylinder is connected to the capping mechanism for pressing the bottle cap of the canned juice, the capping mechanism is connected to the capping mechanism through the adjusting mechanism, and the capping mechanism is fixedly connected to the lower surface of the support frame through a fixing bar, for adjusting the position of the capping mechanism so as to facilitate capping of canned juice bottles of different shapes; the entire mechanism structure is relatively complex, and the capping process is also relatively complex, which is not conducive to improving production efficiency. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems in the prior art and to provide an automatic capping and capping machine, which can enable the device to automatically deliver caps, apply caps and screw caps, with a high degree of automation and improved production efficiency.

[0006] To achieve the above-mentioned purpose, the present invention proposes an automatic capping and capping machine, which includes a frame, a feeding conveyor belt, a capping mechanism, a rotating disk, a capping mechanism, a capping mechanism and a discharging conveyor belt. A rotating disk is rotatably installed on the frame, and the rotating disk is connected to a driving mechanism. The rotating disk is horizontally arranged, and a plurality of bottle clamping grooves are provided on the side wall of the rotating disk, which pass through the upper and lower ends of the rotating disk. A feeding conveyor belt and a discharging conveyor belt for conveying bottles are installed on the frame, and the movement trajectory of the bottle clamping groove sweeps over the feed conveyor belt and the discharging conveyor belt. The support plate is located below the rotating disk, and a capping mechanism is installed on the frame. The capping mechanism includes an electric clamping claw. The motion trajectory generated by the bottle being driven by the rotating disk passes directly below the electric clamping claw. The cap feeding mechanism is used to transport the caps. The discharging end of the cap feeding mechanism is connected to a cap discharging mechanism, which is installed on the frame. A cap pressing mechanism is provided above the cap discharging mechanism for pressing the cap in the cap discharging mechanism downward. The cap pressing mechanism is installed on the frame, and the motion trajectory generated by the bottle being driven by the rotating disk passes directly below the electric clamping claw.

[0007] Preferably, the bottle holding grooves are evenly distributed on the side walls of the rotating disk, the extension line of the bottle's movement trajectory on the feeding conveyor belt is perpendicular to and intersects with the central axis of the rotating disk, and the extension line of the bottle's movement trajectory on the discharging conveyor belt is perpendicular to and intersects with the central axis of the rotating disk.

[0008] Preferably, an arc-shaped bar is installed on the frame, which is concentric with the rotating disk. A bottle passing channel is formed between the arc-shaped bar and the side wall of the rotating disk. When the bottles are driven by the rotating disk, they pass through the bottle passing channel, and the support plate is located below the bottle passing channel.

[0009] Preferably, the capping mechanism includes a first cylinder, a servo motor and an electric clamping claw. The first cylinder is installed on the frame and is arranged vertically downward. The piston rod of the first cylinder is connected to a servo motor, and the servo motor is connected to an electric clamping claw.

[0010] Preferably, the capping mechanism includes a second cylinder and a pressing plate. The second cylinder is mounted on the frame and is arranged vertically downward. A pressing plate is fixed to the end of the piston rod of the second cylinder.

[0011] Preferably, the cover-out mechanism consists of a rectangular channel, an avoidance hole, a cover-out hole and an automatic rebound plate. The rectangular channel is installed on the frame, one end of the rectangular channel is connected to the discharge end of the cover-feeding mechanism, and the other end of the rectangular channel is closed. A avoidance hole for avoiding the cover-pressing mechanism is provided on the top wall of the rectangular channel, and a cover-out hole is provided on the bottom wall of the rectangular channel. The cover-out hole is located directly below the avoidance hole, and the cover-out hole allows the cover to pass through. The cover-out hole is tangent to the closed end of the rectangular channel, and the two side walls of the cover-out hole and the rectangular channel are tangent. An automatic rebound plate is installed at the bottom of the rectangular channel, and the automatic rebound plate presses against the cover surrounded by the cover-out hole.

[0012] Preferably, the cover feeding mechanism includes a discharge hopper, a belt elevator, a blocking plate, a first gear bar, a second gear bar, a guide cover and a conveying pipe. The belt elevator is inclined upward, and a discharge hopper is provided at the lower end of the belt elevator. A plurality of blocking plates are provided on the belt body of the belt elevator. The length direction of the blocking plate is perpendicular to the lifting direction of the belt elevator. The height of the blocking plate is greater than the thickness of the top wall of the cover, the height of the blocking plate is less than the height of the cover body, and the distance between the two ends of the blocking plate and the two sides of the belt conveyor is greater than the diameter of the cover. A guide cover is installed on the upper part, and the guide cover includes a first plate, a second plate, a third plate, a fourth plate and a guide assembly. The first plate is fixed to the belt elevator, and the upper end surface of the first plate and the upper end surface of the upper belt body of the belt elevator are located on the same plane. The second plate is located above the first plate, and the second plate is parallel to the first plate. The vertical distance between the second plate and the first plate is 1.1-1.5 times the height of the cover. The second plate spans the belt body of the belt elevator. The third plate and the first plate are connected between the second plate and the first plate. The fourth plate, the third plate and the fourth plate are all perpendicular to the first plate, the length direction of the third plate is parallel to the lifting direction of the belt elevator, the third plate is close to the side of the first plate close to the blocking plate, the gap between the third plate and the blocking plate is 1mm-3mm, the fourth plate is connected to the top of the third plate, the fourth plate is inclined downward from the top of the third plate, a guide assembly is provided between the first plate and the second plate, the guide assembly and the third plate form a guide channel, the end of the guide channel is connected to a conveying pipe, the end of the conveying pipe is connected There is a cover-out mechanism, a first gear bar is fixed on the belt elevator, the first gear bar is located between the upper belt surface of the belt elevator and the second plate body, the gap between the first gear bar and the belt surface of the belt elevator is less than the height of the cover, the first gear bar is inclined upward from the end away from the first plate body, a second gear bar is fixed on the belt elevator, the second gear bar is located in the middle of the belt elevator, the second gear bar is located above the upper belt surface of the belt elevator, the vertical distance between the second gear bar and the upper belt surface of the belt elevator is 1.1-1.2 times the height of the cover, and the second gear bar is set at an angle.

[0013] Preferably, the belt elevator includes a cam, which is located between the discharge hopper and the second gear bar. The cam is located in the area surrounded by the belt body of the belt elevator. The cam is against the lower end surface of the upper belt body of the belt elevator. When the upper belt body of the belt elevator passes through the cam, the upper belt body bulges upward.

[0014] Preferably, a control device is further included, and the feeding conveyor belt, the capping mechanism, the driving mechanism, the capping mechanism, the capping mechanism and the discharging conveyor belt are all controlled by the control device.

[0015] Beneficial effects of the present invention: The present invention coordinates the feeding conveyor belt, the capping mechanism, the rotating disk, the capping mechanism, the capping mechanism and the discharging conveyor belt, so that the device can realize automatic conveying of caps and bottles, and the caps can be automatically covered on the bottles, and the caps can be automatically tightened, so that the degree of automation of the device is high, which can effectively improve production efficiency.

[0016] The features and advantages of the present invention will be described in detail through embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of the automatic capping and screwing machine of the present invention; Figure 2 This is a front view of the rotating disk and surrounding components of the automatic capping and capping machine of the present invention; Figure 3 It is a cross-sectional view of the capping mechanism and capping mechanism of the automatic capping and capping machine of the present invention; Figure 4 It is a cross-sectional view of the cap feeding mechanism of the automatic capping and capping machine of the present invention.

[0018] In the figure: 1-frame, 2-rotating disk, 3-capping mechanism, 4-capping mechanism, 5-capping mechanism, 6-capping mechanism, 7-guide cover, 11-feeding conveyor belt, 12-discharging conveyor belt, 20-bottle slot, 21-support plate, 22-arc bar, 31-first cylinder, 32-servo motor, 33-electric clamping claw, 41-second cylinder, 42-pressing plate, 51-rectangular channel, 52-automatic rebound plate, 60-discharging hopper, 61-belt elevator, 62-blocking plate, 63-cam, 65-first gear bar, 66-second gear bar, 71-first plate body, 72-second plate body, 73-third plate body, 74-fourth plate body, 75-guide assembly, 76-conveyor pipe. DETAILED DESCRIPTION

[0019] Example 1: See Figure 1 、 Figure 2The automatic capping and capping machine of the present invention includes a frame 1, a feeding conveyor belt 11, a capping mechanism 3, a rotating disk 2, a capping mechanism 6, a capping mechanism 4 and a discharging conveyor belt 12. A rotating disk 2 is rotatably installed on the frame 1, and the rotating disk 2 is connected to a driving mechanism. The rotating disk 2 is horizontally arranged, and a plurality of bottle clamping grooves 20 are provided on the side wall of the rotating disk 2, which pass through the upper and lower ends of the rotating disk 2. The feeding conveyor belt 11 and the discharging conveyor belt 12 for conveying bottles are installed on the frame 1. The movement trajectory of the bottle clamping groove 20 sweeps over the top of the feeding conveyor belt 11 and the top of the discharging conveyor belt 12. The frame 1 is equipped with a support plate 21. The support plate 21 is located below the rotating disk 2. A capping mechanism 3 is installed on the frame 1. The capping mechanism 3 includes an electric clamping claw 33. The motion trajectory generated by the bottle being driven by the rotating disk 2 passes directly below the electric clamping claw 33. The cap feeding mechanism 6 is used to transport the cap. The discharging end of the cap feeding mechanism 6 is connected to a cap discharging mechanism 5. The cap discharging mechanism 5 is installed on the frame 1. A cap pressing mechanism 4 is provided above the cap discharging mechanism 5 for pressing the cap in the cap discharging mechanism 5 downward. The cap pressing mechanism 4 is installed on the frame 1. The motion trajectory generated by the bottle being driven by the rotating disk 2 passes directly below the electric clamping claw 33.

[0020] The bottle holding grooves 20 are evenly distributed on the side walls of the rotating disk 2. The extension line of the bottle's motion trajectory on the feeding conveyor belt 11 is perpendicular to and intersects with the central axis of the rotating disk 2. The extension line of the bottle's motion trajectory on the discharging conveyor belt 12 is perpendicular to and intersects with the central axis of the rotating disk 2.

[0021] The frame 1 is provided with an arc-shaped bar 22 which is concentric with the rotating disk 2. A bottle-passing channel is formed between the arc-shaped bar 22 and the side wall of the rotating disk 2. When the bottles are driven by the rotating disk 2, they pass through the bottle-passing channel. The support plate 21 is located below the bottle-passing channel.

[0022] The system further comprises a control device, and the feeding conveyor belt 11, the capping mechanism 3, the driving mechanism, the cap feeding mechanism 6, the cap pressing mechanism 4 and the discharging conveyor belt 12 are all controlled by the control device.

[0023] Example 2: See Figure 2 The capping mechanism 3 includes a first cylinder 31, a servo motor 32 and an electric clamping claw 33. The first cylinder 31 is installed on the frame 1. The first cylinder 31 is set vertically downward. The piston rod of the first cylinder 31 is connected to a servo motor 32, and the servo motor 32 is connected to an electric clamping claw 33.

[0024] Example 3: See Figure 3The capping mechanism 4 includes a second cylinder 41 and a pressing plate 42. The second cylinder 41 is installed on the frame 1. The second cylinder 41 is set vertically downward. A pressing plate 42 is fixed to the end of the piston rod of the second cylinder 41.

[0025] The cover-discharging mechanism 5 consists of a rectangular channel 51, an avoidance hole, a cover-discharging hole and an automatic rebound plate 52. The rectangular channel 51 is installed on the frame 1. One end of the rectangular channel 51 is connected to the discharge end of the cover-feeding mechanism 6, and the other end of the rectangular channel 51 is closed. A avoidance hole for avoiding the cover-pressing mechanism 4 is provided on the top wall of the rectangular channel 51, and a cover-discharging hole is provided on the bottom wall of the rectangular channel 51. The cover-discharging hole is located directly below the avoidance hole. The cover-discharging hole allows the cover to pass through. The cover-discharging hole is tangent to the closed end of the rectangular channel 51, and the two side walls of the cover-discharging hole and the rectangular channel 51 are tangent. An automatic rebound plate 52 is installed at the bottom of the rectangular channel 51, and the automatic rebound plate 52 presses against the cover surrounded by the cover-discharging hole.

[0026] The automatic rebound plate 52 may be a plate body equipped with a torsion spring, or a plate body that is elastic itself.

[0027] Example 4: See Figure 4 The cover feeding mechanism 6 includes a discharge hopper 60, a belt elevator 61, a blocking plate 62, a first gear bar 65, a second gear bar 65, a guide cover 7 and a conveying pipe 76. The belt elevator 61 is inclined upward, and a discharge hopper 60 is provided at the lower end of the belt elevator 61. A plurality of blocking plates 62 are provided on the belt body of the belt elevator 61. The length direction of the blocking plate 62 is perpendicular to the lifting direction of the belt elevator 61. The height of the blocking plate 62 is greater than the thickness of the top wall of the cover, the height of the blocking plate 62 is less than the height of the cover body, and the distance between the two ends of the blocking plate 62 and the two sides of the belt conveyor is greater than the diameter of the cover.

[0028] In order to ensure that the lid with its opening facing the belt body of the belt elevator 61 will not fall during the lifting process, the height of the blocking plate 62 must meet the following conditions: the lower projection of the center of gravity of the lid with its opening facing the belt body of the belt elevator 61 is located outside the blocking plate 62; the lower projection of the center of gravity of the lid with its opening facing away from the belt body of the belt elevator 61 falls on the blocking plate 62.

[0029] A guide cover 7 is installed on the upper part of the belt elevator 61. The guide cover 7 includes a first plate 71, a second plate 72, a third plate 73, a fourth plate 74 and a guide assembly 75. The first plate 71 is fixed to the belt elevator 61. The upper end surface of the first plate 71 and the upper end surface of the upper belt body of the belt elevator 61 are located on the same plane. The second plate 72 is located above the first plate 71. The second plate 72 is parallel to the first plate 71. The vertical distance between the second plate 72 and the first plate 71 is 1.1-1.5 times the height of the cover. The second plate 72 spans the belt body of the belt elevator 61. The third plate 73 is connected between the second plate 72 and the first plate 71. And the fourth plate body 74, the third plate body 73 and the fourth plate body 74 are both perpendicular to the first plate body 71, the length direction of the third plate body 73 is parallel to the lifting direction of the belt elevator 61, the third plate body 73 is close to the side of the blocking plate 62 close to the first plate body 71, and the gap between the third plate body 73 and the blocking plate 62 is 1mm-3mm. The fourth plate body 74 is connected to the top of the third plate body 73, and the fourth plate body 74 is inclined downward from the top of the third plate body 73. A guide assembly 75 is provided between the first plate body 71 and the second plate body 72, and the guide assembly 75 and the third plate body 73 form a guide channel. The end of the guide channel is connected to a conveying pipe 76, and the end of the conveying pipe 76 is connected to the cover mechanism 5.

[0030] A first bar 65 is fixed on the belt elevator 61, and the first bar 65 is located between the upper belt surface of the belt elevator 61 and the second plate 72. The gap between the first bar 65 and the belt surface of the belt elevator 61 is smaller than the height of the cover, and the first bar 65 is inclined upward from the end away from the first plate 71.

[0031] A second bar 65 is fixed on the belt elevator 61. The second bar 65 is located in the middle of the belt elevator 61. The second bar 65 is located above the upper belt surface of the belt elevator 61. The vertical distance between the second bar 65 and the upper belt surface of the belt elevator 61 is 1.1-1.2 times the height of the cover, and the second bar 65 is set at an angle.

[0032] In order to further ensure that the cover with the opening facing the belt body of the belt elevator 61 will not fall during the lifting process, the belt elevator 61 includes a cam 63, which is located between the discharge hopper 60 and the second gear bar 65. The cam 63 is located in the area surrounded by the belt body of the belt elevator 61. The cam 63 is against the lower end surface of the upper belt body of the belt elevator 61. When the upper belt body of the belt elevator 61 passes through the cam 63, the upper belt body protrudes upward.

[0033] Working process of the present invention: During the operation of the automatic capping and capping machine of the present invention, the bottle enters the bottle clamping groove 20 of the rotating disk 2 under the drive of the feeding conveyor belt 11. The rotating disk 2 drives the bottle to move. When the bottle moves to the bottom of the capping mechanism 5, the second cylinder 41 drives the pressing plate 42 to press down. The pressing plate presses the cap located below 42 out of the capping hole of the rectangular channel 51. The cap is pressed on the bottle mouth. During the pressing process, the automatic rebound plate 52 will be pushed open. After the capping is completed, the second cylinder 42 resets, and the automatic rebound plate 52 also resets. The conveying pipe 76 conveys the new cap into the rectangular channel 51. The bottle rotates The disc 2 continues to move driven by it. When the bottle moves to the bottom of the capping mechanism 3, the first cylinder 31 drives the servo motor 32 and the electric clamping claw 33 connected to the servo motor 32 to move downward until it moves to the position where the electric clamping claw 33 can clamp the lid on the bottle. The electric clamping claw 33 clamps the lid, and the servo motor 32 drives the electric clamping claw 33 to rotate. The electric clamping claw 33 tightens the bottle, and then the electric clamping claw 33 resets. The first cylinder 31 resets, and the rotating disc 2 continues to move with the bottle. When the bottle is moved to the discharge conveyor belt 12, the bottle will be taken away by the discharge conveyor belt 12.

[0034] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. Automatic capping and screwing machine, characterized by: The invention comprises a frame (1), a feeding conveyor belt (11), a capping mechanism (3), a rotating disk (2), a capping mechanism (6), a capping mechanism (4) and a discharging conveyor belt (12). A rotating disk (2) is rotatably mounted on the frame (1). The rotating disk (2) is connected to a driving mechanism. The rotating disk (2) is arranged horizontally. A plurality of bottle-holding grooves (20) are provided on the side wall of the rotating disk (2) and pass through the upper and lower ends of the rotating disk (2). The feeding conveyor belt (11) and the discharging conveyor belt (12) for conveying bottles are mounted on the frame (1). The motion trajectory of the bottle-holding groove (20) sweeps over the feeding conveyor belt (11) and the discharging conveyor belt (12). A support plate (21) is mounted on the frame (1). The support plate ( 21) is located below the rotating disk (2), and a capping mechanism (3) is installed on the frame (1). The capping mechanism (3) includes an electric clamping claw (33). The motion trajectory generated by the bottle being driven by the rotating disk (2) passes directly below the electric clamping claw (33). The cap feeding mechanism (6) is used to transport the cap. The discharge end of the cap feeding mechanism (6) is connected to a cap discharging mechanism (5). The cap discharging mechanism (5) is installed on the frame (1). A cap pressing mechanism (4) for pressing the cap in the cap discharging mechanism (5) downward is provided above the cap discharging mechanism (5). The cap pressing mechanism (4) is installed on the frame (1). The motion trajectory generated by the bottle being driven by the rotating disk (2) passes directly below the electric clamping claw (33).

2. The automatic capping and screwing machine according to claim 1, characterized in that: The bottle holding grooves (20) are evenly distributed on the side wall of the rotating disk (2), the extension line of the movement trajectory of the bottle on the feeding conveyor belt (11) is perpendicular to and intersects with the central axis of the rotating disk (2), and the extension line of the movement trajectory of the bottle on the discharging conveyor belt (12) is perpendicular to and intersects with the central axis of the rotating disk (2).

3. The automatic capping and screwing machine according to claim 1, characterized in that: An arc-shaped bar (22) is mounted on the frame (1). The arc-shaped bar (22) is concentric with the rotating disk (2). A bottle-passing channel is formed between the arc-shaped bar (22) and the side wall of the rotating disk (2). When the bottles are driven by the rotating disk (2), they pass through the bottle-passing channel. The support plate (21) is located below the bottle-passing channel.

4. The automatic capping and screwing machine according to claim 1, characterized in that: The capping mechanism (3) comprises a first cylinder (31), a servo motor (32) and an electric clamping claw (33). The first cylinder (31) is mounted on the frame (1). The first cylinder (31) is arranged vertically downward. The piston rod of the first cylinder (31) is connected to a servo motor (32), and the servo motor (32) is connected to an electric clamping claw (33).

5. The automatic capping and screwing machine according to claim 1, characterized in that: The capping mechanism (4) comprises a second cylinder (41) and a pressing plate (42). The second cylinder (41) is mounted on the frame (1). The second cylinder (41) is arranged vertically downward. A pressing plate (42) is fixed to the end of the piston rod of the second cylinder (41).

6. The automatic capping and screwing machine according to claim 1, characterized in that: The cover discharging mechanism (5) is composed of a rectangular channel (51), an avoidance hole, a cover discharging hole and an automatic rebound plate (52). The rectangular channel (51) is installed on the frame (1). One end of the rectangular channel (51) is connected to the discharge end of the cover feeding mechanism (6), and the other end of the rectangular channel (51) is sealed. A avoidance hole for avoiding the cover pressing mechanism (4) is provided on the top wall of the rectangular channel (51). A cover discharging hole is provided on the bottom wall of the rectangular channel (51). The cover discharging hole is located directly below the avoidance hole. The cover discharging hole allows the cover to pass through. The cover discharging hole is tangent to the closed end of the rectangular channel (51). The cover discharging hole and the two side walls of the rectangular channel (51) are tangent. The bottom of the rectangular channel (51) is installed with an automatic rebound plate (52). The automatic rebound plate (52) presses against the cover surrounded by the cover discharging hole.

7. The automatic capping and screwing machine according to claim 1, characterized in that: The cover feeding mechanism (6) includes a discharge hopper (60), a belt elevator (61), a blocking plate (62), a first gear bar (65), a second gear bar (65), a guide cover (7) and a conveying pipe (76), wherein the belt elevator (61) is inclined upward, and a discharge hopper (60) is provided at the lower end of the belt elevator (61), and a plurality of blocking plates (62) are provided on the belt body of the belt elevator (61), wherein the length direction of the blocking plates (62) is perpendicular to the lifting direction of the belt elevator (61), the height of the blocking plates (62) is greater than the thickness of the top wall of the cover, the height of the blocking plates (62) is less than the height of the cover body, and the distance between the two ends of the blocking plates (62) and the two sides of the belt conveyor is The diameter of the cover is larger than that of the cover. A guide cover (7) is installed on the upper part of the belt elevator (61). The guide cover (7) includes a first plate (71), a second plate (72), a third plate (73), a fourth plate (74) and a guide assembly (75). The first plate (71) is fixed to the belt elevator (61). The upper end surface of the first plate (71) and the upper end surface of the upper belt of the belt elevator (61) are located on the same plane. The second plate (72) is located above the first plate (71). The second plate (72) is parallel to the first plate (71). The vertical distance between the second plate (72) and the first plate (71) is 1.1-1.5 times, the second plate (72) spans the belt of the belt elevator (61), the third plate (73) and the fourth plate (74) are connected between the second plate (72) and the first plate (71), the third plate (73) and the fourth plate (74) are both perpendicular to the first plate (71), the length direction of the third plate (73) is parallel to the lifting direction of the belt elevator (61), the third plate (73) is close to the side of the blocking plate (62) close to the first plate (71), the gap between the third plate (73) and the blocking plate (62) is 1mm-3mm, the fourth plate (74) is connected to the top of the third plate (73), the fourth plate (74) is inclined downward from the top of the third plate (73), a guide assembly (75) is provided between the first plate (71) and the second plate (72), the guide assembly (75) and the third plate (73) A guide channel is formed, the end of the guide channel is connected to a conveying pipe (76), and the end of the conveying pipe (76) is connected to a cover discharging mechanism (5). A first gear bar (65) is fixed on the belt elevator (61), and the first gear bar (65) is located between the upper belt surface of the belt elevator (61) and the second plate body (72). The gap between the first gear bar (65) and the belt surface of the belt elevator (61) is smaller than the height of the cover. The first gear bar (65) is inclined upward from the end away from the first plate body (71). A second gear bar (65) is fixed on the belt elevator (61), and the second gear bar (65) is located in the middle of the belt elevator (61). The second gear bar (65) is located above the upper belt surface of the belt elevator (61). The vertical distance between the second gear bar (65) and the upper belt surface of the belt elevator (61) is 1.1-1.2 times the height of the cover. The second gear bar (65) is inclined.

8. The automatic capping and screwing machine according to claim 7, characterized in that: The belt elevator (61) includes a cam (63), which is located between the discharge hopper (60) and the second gear bar (65). The cam (63) is located in the area surrounded by the belt body of the belt elevator (61). The cam (63) abuts against the lower end surface of the upper belt body of the belt elevator (61). When the upper belt body of the belt elevator (61) passes through the cam (63), the upper belt body protrudes upward.

9. The automatic capping and screwing machine according to any one of claims 1 to 8, characterized in that: The invention also includes a control device, wherein the feeding conveyor belt (11), the capping mechanism (3), the driving mechanism, the cap feeding mechanism (6), the cap pressing mechanism (4) and the discharging conveyor belt (12) are all controlled by the control device.

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