Cap supply device and cap screwing machine

Abstract

The utility model provides a cap supplying device and a cap screwing machine, the cap supplying device comprises a seat frame, a material box, a conveying unit and a power unit, the conveying unit is vertically fixed on the seat frame, the material box is fixed at the bottom of the conveying unit, the bottom of the conveying unit extends into the material box, the material box is used for storing bottle caps, and the power unit is used for driving the conveying unit to rotate. The power unit is fixed to the conveying unit and used for driving the conveying unit to convey the bottle caps in the material box to the top of the conveying unit, and the top of the conveying unit is used for being in butt joint with the cap screwing machine body. According to the cap supply device, the seat frame is arranged, the conveying unit is vertically fixed to the seat frame, the top of the conveying unit is used for being in butt joint with the cap screwing machine body, and therefore the cap supply device independent of the cap screwing machine body is provided, the cap supply device can be integrally applied to other cap screwing machine bodies without tedious disassembly and assembly operation, and the cap supply device is convenient to use. And the height from the material box to the ground is reduced, so that the operation of workers is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of container packaging equipment, in particular to a cap supplying device and a capping machine. Background Art

[0002] The capping machine is a kind of equipment used in industries such as food and daily chemicals to seal bottle mouths. It is used to screw three-turn and four-turn bottle caps made of tinplate on the mouth of glass bottles. Capping machines with a high degree of automation usually need to be equipped with a matching cap supply mechanism (also called a cap transport mechanism), which is used to transport the bottle caps to be packaged to the pre-spin mechanism (also called a pre-sealing mechanism).

[0003] At present, the cap supply mechanism on many capping machines is directly fixed on the main body of the capping machine, such as the application number 201821731578.4, the patent name of a vacuum capping machine, and the application number 202210791740.6, the patent name of a capping device. As shown in the disclosed content, due to the high height of this cap supply mechanism, it is inconvenient for workers to replenish bottle caps, and it is also inconvenient to disassemble and assemble, so the cap supply mechanism is often only applicable to the capping machine. Each capping machine needs to be equipped with a set of cap supply mechanisms, resulting in a certain degree of idle waste. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a cap supplying device and a capping machine, which solves the problem that the cap supplying mechanism on the existing capping machine is directly fixed on the capping machine body, resulting in a high height and inconvenient disassembly and replenishment of bottle caps.

[0005] In order to solve the above technical problems, the technical solution used in the utility model is:

[0006] The utility model discloses a cap supply device, which is used for a capping machine, and comprises a frame, a material box, a conveying unit and a power unit. The conveying unit is vertically fixed on the frame, the material box is fixed on the bottom of the conveying unit, and the bottom of the conveying unit extends into the material box. The material box is used to store bottle caps. The power unit is fixed on the conveying unit and is used to drive the conveying unit to convey the bottle caps in the material box from the top of the conveying unit. The top of the conveying unit is used to dock with the main body of the capping machine.

[0007] Preferably, it further comprises a channel adjustment unit, wherein the channel adjustment unit is connected to the conveying unit and is used to adjust the width of the conveying channel of the conveying unit.

[0008] Further preferably, the channel adjustment unit includes a baffle, the conveying unit includes a conveying frame, the conveying channel is located on the conveying frame, one side of the conveying frame is provided with more than one adjustment rod at intervals along the conveying channel, and one end of the adjustment rod is axially movably connected to the conveying frame, and the other end is connected to the baffle, and the baffle is arranged on the conveying channel along the extension direction of the conveying channel.

[0009] Further preferably, a recovery channel is provided on the other side of the conveying frame, the inlet of the recovery channel is communicated with the conveying channel, and the outlet of the recovery channel is communicated with the material box;

[0010] A distance sensor and an air outlet pipe corresponding to the distance sensor are provided on the baffle plate, and both the distance sensor and the air outlet pipe face the inlet of the recovery channel. The distance sensor is also used to communicate with the control system of the capping machine, and the control system controls whether the air outlet pipe discharges air according to the data sent by the distance sensor.

[0011] More preferably, the seat frame is provided with an air source processor, and the air pipe extends to the inlet of the recovery channel after passing through the air source processor;

[0012] And / or, a stopper plate is provided at the lower end of the baffle, and a narrowing plate which fits the conveying channel is provided at the stopper plate of the conveying frame, and the narrowing plate is used to limit the number of bottle caps which can pass through at the same time.

[0013] Preferably, the conveying unit comprises a strip-shaped conveying frame and an annular conveying belt, the conveying frame is provided with rollers at the upper and lower ends respectively, the conveying frame is provided with magnetic plates between the rollers at both ends, the conveying belt is sleeved around the outer circumferences of the rollers at both ends and is tensioned, and the magnetic plates are in contact with the conveying belt;

[0014] A transition frame is provided on one side of the top of the conveying frame, and the transition frame is provided with a transition channel obliquely downward, one end of the transition channel is connected to the conveyor belt, and the other end is used to connect with the capping machine body; an arc-shaped guide plate is also provided on the other side of the top of the conveying frame, and the guide plate is used to guide the bottle caps to the transition channel.

[0015] Further preferably, the seat frame is provided with an adjustment component, and the adjustment component is connected to the conveying frame and is used to adjust the height of the conveying unit;

[0016] And / or, the conveying frame is laterally provided with a first cross bar and a second cross bar parallel to each other, the second cross bar is located below the first cross bar, and the seat frame is provided with an adjusting rod below the first cross bar, and the adjusting rod can reciprocate along its axial direction, and the upper end of the adjusting rod is vertically connected to the first cross bar; the seat frame is provided with two strip sliding grooves corresponding to the two ends of the second cross bar respectively, and the sliding grooves are parallel to the adjusting rod, and the two ends of the second cross bar are respectively inserted into the corresponding sliding grooves and are slidably connected to the sliding grooves.

[0017] Further preferably, the adjustment rod is a screw threadedly connected to the seat frame, and a hand wheel is provided at the lower end of the screw; the conveying frame includes a first longitudinal beam and a second longitudinal beam parallel to each other, the first longitudinal beam is provided with a first fixed ear plate and a second fixed ear plate, the second longitudinal beam is correspondingly provided with a third fixed ear plate and a fourth fixed ear plate, the two ends of the first cross bar are correspondingly connected to the first fixed ear plate and the third fixed ear plate, and the two ends of the second cross bar are correspondingly connected to the corresponding sliding grooves after passing through the second fixed ear plate and the fourth fixed ear plate;

[0018] And / or, the seat frame is respectively provided with sleeves on both sides of the adjusting rod, and a guide rod is provided in the sleeve which penetrates the adjusting rod along its axial direction and is slidably connected with the adjusting rod, the guide rod is parallel to the adjusting rod and the axes of the two are located in the same plane, and the two ends of the first cross bar correspondingly penetrate the first fixed ear plate and the third fixed ear plate and are respectively connected to the upper ends of the guide rods on the corresponding sides.

[0019] Further preferably, the power unit includes a drive motor and an electric control box, the electric control box is connected to the seat frame, the drive motor is arranged at the bottom of the conveying frame, the output shaft of the drive motor is transmission-connected to the roller located at the lower end of the conveying frame, and the drive motor is electrically connected to the electric control box.

[0020] In addition, a capping machine is also provided, comprising a main body, the main body being provided with a pre-sealing mechanism, the pre-sealing mechanism being used to cover the bottle cap to be packaged on the opening of the packaging bottle, and also comprising the above-mentioned cap supplying device and a slide with a downward inclined trajectory, the upper end of the slide being connected to the top of the cap supplying device, and the lower end of the slide being connected to the pre-sealing mechanism.

[0021] Compared with the prior art, the beneficial effects of the cover supply device described in the utility model are mainly reflected in:

[0022] The cap supply device of the utility model vertically fixes the conveying unit on the seat frame by arranging the seat frame, and the top of the conveying unit is used to dock with the capping machine body, thereby providing a cap supply device independent of the capping machine body, which can be applied to other capping machine bodies as a whole without complicated disassembly and assembly operations, and the bottom of the conveying unit extends into the material box, and the material box is fixed to the bottom of the conveying unit, which greatly reduces the height of the material box from the ground, making it more convenient for workers to replenish and check bottle caps, so it can solve the problem that the cap supply mechanism on the existing capping machine is directly fixed on the capping machine body, resulting in a high height and inconvenient disassembly and assembly and replenishment of bottle caps.

[0023] Compared with the prior art, the beneficial effects of the capping machine described in the utility model are mainly reflected in:

[0024] The capping machine of this embodiment adopts the cap supplying device of the aforementioned embodiment, which can facilitate manual replenishment of bottle caps into the material box, and when the main body fails, the cap supplying device and the main body can be quickly separated and docked, thereby realizing quick replacement of the main body, which can improve the utilization rate of the cap supplying device and the capping production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other purposes, features and advantages of the present invention will become more apparent through a more specific description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals in all the accompanying drawings indicate the same parts, and the drawings are not intentionally scaled to the actual size, but the focus is on illustrating the subject matter of the present invention.

[0026] Figure 1 A three-dimensional structure of a cover supply device provided in an embodiment of the utility model Figure 1 ;

[0027] Figure 2 A three-dimensional structure of a cover supply device provided in an embodiment of the utility model Figure 2 (Hide some structure);

[0028] Figure 3 A three-dimensional structure of a cover supply device provided in an embodiment of the utility model Figure 3 (Hide some structure);

[0029] Figure 4 A three-dimensional structural diagram of a capping machine provided by an embodiment of the utility model;

[0030] Description of the drawings: seat frame 1, material box 2, baffle 3, conveying frame 4, first longitudinal beam 401, second longitudinal beam 402, adjusting pull rod 5, seat plate 6, recovery channel 7, distance sensor 8, air outlet pipe 9, air source processor 10, stop cross plate 11, narrowing plate 12, strip through hole 13, conveyor belt 14, roller 15, magnetic plate 16, magnetic hole 17, transition frame 18, transition channel 180, guide plate 19, first cross bar 20, second cross bar 21, adjusting rod 22, sliding groove 23, hand wheel 24, sleeve 25, guide rod 26, drive motor 27, electric control box 28, first fixed ear plate 29, second fixed ear plate 30, third fixed ear plate 31, fourth fixed ear plate 32, cover supply device 100, main body 200, pre-sealing mechanism 300, slide 400. DETAILED DESCRIPTION

[0031] The technical scheme of the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the utility model and implement it, but the examples given are not intended to limit the utility model. In the present embodiments, it should be understood that the orientations or positional relationships indicated by terms such as "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the utility model.

[0032] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element and integrated therewith, or there may be an intermediate element at the same time. The terms "installed", "one end", "the other end" and similar expressions used in this utility model are for illustrative purposes only.

[0033] This embodiment provides a cover supply device, such as Figures 1 to 3 As shown, it includes a base frame 1, a material box 2, a conveying unit and a power unit. The conveying unit is vertically fixed on the base frame 1, the material box 2 is fixed at the bottom of the conveying unit, and the bottom of the conveying unit extends into the material box 2. The material box 2 is used to store bottle caps. The power unit is fixed on the conveying unit and is used to drive the conveying unit to convey the bottle caps in the material box 2 from the top of the conveying unit. The top of the conveying unit is used to dock with the main body of the capping machine.

[0034] The cap supply device of this embodiment is provided with a seat frame 1, and the conveying unit is vertically fixed on the seat frame 1. The top of the conveying unit is used to connect with the main body of the capping machine, thereby providing a cap supply device independent of the main body of the capping machine, which can be applied to other capping machine main bodies as a whole without complicated disassembly and assembly operations. The bottom of the conveying unit extends into the material box 2, and the material box 2 is fixed to the bottom of the conveying unit, which greatly reduces the height of the material box 2 from the ground, making it more convenient for workers to replenish and check bottle caps. Therefore, the problem that the cap supply mechanism on the existing capping machine is directly fixed on the main body of the capping machine, resulting in a high height and inconvenient disassembly and assembly and replenishment of bottle caps, can be solved.

[0035] In a preferred embodiment, the cap supply device further comprises a channel adjusting unit, which is connected to the conveying unit and is used to adjust the width of the conveying channel of the conveying unit, so as to be suitable for the transmission of bottle caps with different diameters.

[0036] Further, such as Figure 2 As shown, the channel adjustment unit includes a baffle 3, and the conveying unit includes a conveying frame 4. The conveying channel is located on the conveying frame 4. One side of the conveying frame 4 is provided with one or more adjustment rods 5 at intervals along the conveying channel, and one end of the adjustment rod 5 is axially movably connected to the conveying frame 4, and the other end is connected to the baffle 3, and the baffle 3 is arranged on the conveying channel along the extension direction of the conveying channel. In this embodiment, the baffle 3 divides the conveying channel into two in the width direction. By axially adjusting the adjustment rod 5, the baffle 3 can be pulled to move, thereby changing the distance between the baffle 3 and one side of the conveying channel to adapt to the bottle cap of the corresponding diameter. Among them, the number of the adjustment rods 5 can be appropriately selected according to the length of the baffle 3 to ensure the consistency of the channel width. As an example, the adjustment rod 5 can be a threaded straight rod, and a seat plate 6 is correspondingly provided on the conveying frame 4. The threaded straight rod is threadedly connected to the seat plate 6, and the axial movement is achieved by rotating the threaded straight rod, thereby driving the baffle 3 to move.

[0037] A recovery channel 7 is provided on the other side of the conveying frame 4, the inlet of the recovery channel 7 is connected to the conveying channel, and the outlet of the recovery channel 7 is connected to the material box 2;

[0038] A distance sensor 8 and an air outlet pipe 9 corresponding to the distance sensor 8 are provided on the baffle 3. The distance sensor 8 and the air outlet pipe 9 both face the inlet of the recovery channel 7. The distance sensor 8 is also used to communicate with the control system of the capping machine. The control system controls whether the air outlet pipe 9 discharges air according to the data sent by the distance sensor 8.

[0039] The bottle cap has a relative flat surface and a concave surface. When the bottle cap is attached to the conveying channel, the distance sensor 8 can obtain the closest distance between it and the bottle cap. By judging the closest distance, it can be judged whether the flat surface of the bottle cap is in contact with the surface of the conveying channel. The control system is preset with the closest distance corresponding to this type of bottle cap. When the control system receives data from the distance sensor 8 and judges that it does not meet the preset closest distance value, it will control the air outlet pipe 9 to blow the bottle cap into the recovery channel 7 and then fall back into the material box 2 to achieve screening. More than two distance sensors 8 can be set along the conveying direction of the conveying channel, and the air outlet pipe 9 is also set accordingly, so as to improve the success rate of screening and reduce the probability of passing unqualified bottle caps. Furthermore, an air source processor 10 is set on the seat frame 1. After the air pipe passes through the air source processor 10, it extends to the inlet of the recovery channel 7. The air source processor 10 can filter impurities such as water and oil in the gas in the air pipe, thereby preventing the bottle cap from being contaminated by gas.

[0040] A stopper plate 11 is provided at the lower end of the baffle 3 to prevent the bottle caps in the material box 2 from being lifted and transported to the conveying channel on the same side as the adjusting rod 5. The conveying frame 4 is provided with a narrowing plate 12 that fits the conveying channel at the stopper plate 11. The narrowing plate 12 is used to limit the number of bottle caps that can pass through at the same time. The narrowing plate 12 can move along the width direction of the conveying channel to adjust the width of the channel opening to accommodate bottle caps of different diameters. As an example, specifically, the conveying frame 4 is provided with a strip through hole 13 (not shown in the figure), and the narrowing plate 12 is detachably connected to the conveying frame 4 through a bolt that passes through the strip through hole 13, thereby realizing the movement of the narrowing plate 12; the narrowing plate 12 is a right-angled trapezoid, and its hypotenuse is inverted on the conveying channel. Through its acute angle, a channel section that shrinks in the conveying direction can be formed, thereby playing the role of making the bottle caps queue up from the material box 2 to avoid congestion and disorder.

[0041] In another preferred embodiment, the conveying unit includes a strip-shaped conveying frame 4 and an annular conveying belt 14, and rollers 15 (not shown in the figure) are respectively arranged at the upper and lower ends of the conveying frame 4, and a magnetic suction plate 16 is arranged between the rollers 15 at both ends of the conveying frame 4. The conveying belt 14 is sleeved on the outer periphery of the rollers 15 at both ends and is tensioned, and the magnetic suction plate 16 is in contact with the conveying belt 14; the function of the magnetic suction plate 16 is to magnetically suck the bottle caps onto the conveying belt 14. Specifically, the magnetic suction plate 16 is evenly spaced along the conveying direction of the conveying belt 14. A plurality of magnetic suction holes 17 are embedded in the magnetic suction holes 17. The magnets can form an uninterrupted magnetic field in the conveying direction, thereby ensuring that the bottle caps are magnetically sucked onto the conveying belt. The conveyor belt 14 moves continuously along the conveyor belt 14. It should be noted that the spacing between the magnetic holes 17 should not be too large. The spacing should be determined accordingly considering the magnetic field range of the magnet to ensure the continuity of the magnetic field; preferably, the bottom area of ​​the magnetic plate 16 extends into the material box 2, and the area where the magnetic plate 16 is located outside the material box 2 is the upper area. The upper area of ​​the magnetic plate 16 is provided with a row of magnetic holes 17 along the conveying direction of the conveyor belt 14, and the row of magnetic holes 17 is located on the side of the conveying channel of the conveyor belt 14. The bottom area of ​​the magnetic plate 16 is provided with multiple rows of magnetic holes 17 at intervals along the conveying direction of the conveyor belt 14, which can ensure that a sufficient number of bottle caps are provided for the upper area, thereby improving the conveying efficiency.

[0042] A transition frame 18 is provided on one side of the top of the conveyor frame 4, and the transition frame 18 is provided with a transition channel 180 inclined downward. One end of the transition channel 180 is connected to the conveyor belt 14, and the other end is used to connect with the capping machine body. An arc-shaped guide plate 19 is also provided on the other side of the top of the conveyor frame 4. The guide plate 19 is used to guide the bottle caps to the transition channel 180.

[0043] Furthermore, the base frame 1 is provided with an adjustment component, which is connected to the conveying frame 4 and is used to adjust the height of the conveying unit, so that the height of the transition frame 18 can be adjusted to meet the needs of different docking heights of the capping machine. For example, when packaging bottles of different heights, after the capping machine is adjusted in height, the cap supply device is adjusted in height accordingly to achieve smooth docking between the capping machine and the cap supply device.

[0044] Specifically, Figure 3As shown, the conveying frame 4 is transversely provided with a first crossbar 20 and a second crossbar 21 which are parallel to each other, and the second crossbar 21 is located below the first crossbar 20. The seat frame 1 is provided with an adjustment rod 22 below the first crossbar 20, and the adjustment rod 22 can reciprocate along its axial direction, and the upper end of the adjustment rod 22 is vertically connected to the first crossbar 20; the seat frame 1 is provided with two strip-shaped sliding grooves 23 corresponding to the two ends of the second crossbar 21, and the sliding grooves 23 are parallel to the adjustment rod 22, and the two ends of the second crossbar 21 are respectively inserted into the corresponding sliding grooves 23 and slidably connected to the sliding grooves 23. In this embodiment, when the adjustment rod 22 is axially adjusted, an external pulling force perpendicular to the first crossbar 20 will be applied to the first crossbar 20, and the two ends of the second crossbar 21 are slidably connected to the sliding grooves, so that the conveying frame 4 can be pulled up and down accordingly to achieve height adjustment. Preferably, the adjustment rod 22 and the sliding groove are both perpendicular to the horizontal plane, and the first crossbar 20 and the second crossbar 21 are both kept horizontal.

[0045] The adjusting rod 22 is a screw threadedly connected to the seat frame 1, and a hand wheel 24 is provided at the lower end of the screw. The screw can be moved up and down by turning the hand wheel 24; the conveying frame 4 includes a first longitudinal beam 401 and a second longitudinal beam 402 parallel to each other, the first longitudinal beam 401 is provided with a first fixed ear plate 29 and a second fixed ear plate 30, and the second longitudinal beam 402 is correspondingly provided with a third fixed ear plate 31 and a fourth fixed ear plate 32, the two ends of the first cross bar 20 are correspondingly connected to the first fixed ear plate 29 and the third fixed ear plate 31, and the two ends of the second cross bar 21 are correspondingly passed through the second fixed ear plate 30 and the fourth fixed ear plate 32 and then slidably connected to the corresponding sliding groove 23.

[0046] The seat frame 1 is provided with sleeves 25 on both sides of the adjusting rod 22, and a guide rod 26 is provided in the sleeve 25, which penetrates along the axial direction and is slidably connected with the sleeve 25. The guide rod 26 is parallel to the adjusting rod 22 and the axes of the two are located in the same plane. The two ends of the first cross bar 20 pass through the first fixed ear plate 29 and the third fixed ear plate 31 respectively and are connected to the upper ends of the guide rods 26 on the corresponding sides. By providing the guide rods 26, it can be ensured that the first cross bar 20 moves stably under the drive of the adjusting rod 22 to avoid shaking and jamming.

[0047] Furthermore, the power unit includes a drive motor 27 and an electrical control box 28. The electrical control box 28 is connected to the seat frame 1. The drive motor 27 is arranged at the bottom of the conveying frame 4. The output shaft of the drive motor 27 is transmission-connected to the roller 15 located at the lower end of the conveying frame 4. The drive motor 27 is electrically connected to the electrical control box 28.

[0048] In addition, an embodiment of a capping machine is also provided, such as Figure 4As shown, it includes a main body 200, and the main body 200 is provided with a pre-sealing mechanism 300. The pre-sealing mechanism 300 is used to cover the bottle caps to be packaged on the opening of the packaging bottle, and also includes the above-mentioned cap supply device and a slide 400 with a downward inclined trajectory. The upper end of the slide 400 is docked with the top of the cap supply device, and the lower end of the slide 400 is connected to the pre-sealing mechanism 300. Among them, the structure of the main body 200 of the capping machine is the prior art, as shown in the application number 202210791740.6, and the patent name is a disclosed content of a capping device, which will not be repeated here. The capping machine of this embodiment adopts the cap supply device in the aforementioned embodiment, which can facilitate manual replenishment of bottle caps in the material box 2, and when the main body 200 fails, the cap supply device and the main body 200 can be quickly separated and docked, thereby realizing the quick replacement of the main body 200 of the capping machine, which can improve the utilization rate of the cap supply device and the capping production efficiency.

[0049] In this specification, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] In the description of this specification, the description with reference to the terms "preferred embodiment", "further embodiment", "other embodiments" or "specific example" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0051] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A cap supply device for a capping machine, characterized in that: It includes a base frame, a material box, a conveying unit and a power unit, wherein the conveying unit is vertically fixed on the base frame, the material box is fixed on the bottom of the conveying unit, and the bottom of the conveying unit extends into the material box, the material box is used to store bottle caps, the power unit is fixed on the conveying unit, and is used to drive the conveying unit to convey the bottle caps in the material box from the top of the conveying unit, and the top of the conveying unit is used to dock with the main body of the capping machine.

2. A cap supply device according to claim 1, characterized in that: It also includes a channel adjustment unit, which is connected to the conveying unit and is used to adjust the width of the conveying channel of the conveying unit.

3. A cap supply device according to claim 2, characterized in that: The channel adjustment unit includes a baffle, the conveying unit includes a conveying frame, the conveying channel is located on the conveying frame, one side of the conveying frame is provided with more than one adjustment rod at intervals along the conveying channel, and one end of the adjustment rod is axially movably connected to the conveying frame, and the other end is connected to the baffle, and the baffle is arranged on the conveying channel along the extension direction of the conveying channel.

4. A cap supply device according to claim 3, characterized in that: A recovery channel is provided on the other side of the conveying frame, the inlet of the recovery channel is communicated with the conveying channel, and the outlet of the recovery channel is communicated with the material box; A distance sensor and an air outlet pipe corresponding to the distance sensor are provided on the baffle plate, and both the distance sensor and the air outlet pipe face the inlet of the recovery channel. The distance sensor is also used to communicate with the control system of the capping machine, and the control system controls whether the air outlet pipe discharges air according to the data sent by the distance sensor.

5. A cap supply device according to claim 4, characterized in that: The seat frame is provided with an air source processor, and the air pipe extends to the inlet of the recovery channel after passing through the air source processor; And / or, a stopper plate is provided at the lower end of the baffle, and a narrowing plate which fits the conveying channel is provided at the stopper plate of the conveying frame, and the narrowing plate is used to limit the number of bottle caps which can pass through at the same time.

6. A cap supply device according to claim 1, characterized in that: The conveying unit includes a strip-shaped conveying frame and an annular conveying belt. The conveying frame is provided with rollers at the upper and lower ends respectively. The conveying frame is provided with magnetic plates between the rollers at both ends. The conveying belt is sleeved around the outer circumference of the rollers at both ends and is tensioned. The magnetic plates are in contact with the conveying belt. A transition frame is provided on one side of the top of the conveying frame, and the transition frame is provided with a transition channel obliquely downward, one end of the transition channel is connected to the conveyor belt, and the other end is used to connect with the capping machine body; an arc-shaped guide plate is also provided on the other side of the top of the conveying frame, and the guide plate is used to guide the bottle caps to the transition channel.

7. A cap supply device according to claim 6, characterized in that: The seat frame is provided with an adjustment component, which is connected to the conveying frame and is used to adjust the height of the conveying unit; And / or, the conveying frame is laterally provided with a first cross bar and a second cross bar parallel to each other, the second cross bar is located below the first cross bar, and the seat frame is provided with an adjusting rod below the first cross bar, and the adjusting rod can reciprocate along its axial direction, and the upper end of the adjusting rod is vertically connected to the first cross bar; the seat frame is provided with two strip sliding grooves corresponding to the two ends of the second cross bar respectively, and the sliding grooves are parallel to the adjusting rod, and the two ends of the second cross bar are respectively inserted into the corresponding sliding grooves and are slidably connected to the sliding grooves.

8. A cap supply device according to claim 7, characterized in that: The adjusting rod is a screw connected to the seat frame by thread, and a hand wheel is arranged at the lower end of the screw; the conveying frame comprises a first longitudinal beam and a second longitudinal beam parallel to each other, the first longitudinal beam is provided with a first fixed ear plate and a second fixed ear plate, the second longitudinal beam is correspondingly provided with a third fixed ear plate and a fourth fixed ear plate, the two ends of the first cross bar are correspondingly connected to the first fixed ear plate and the third fixed ear plate, and the two ends of the second cross bar are correspondingly connected to the corresponding sliding groove after passing through the second fixed ear plate and the fourth fixed ear plate; And / or, the seat frame is respectively provided with sleeves on both sides of the adjusting rod, and a guide rod is provided in the sleeve which penetrates the adjusting rod along its axial direction and is slidably connected with the adjusting rod, the guide rod is parallel to the adjusting rod and the axes of the two are located in the same plane, and the two ends of the first cross bar correspondingly penetrate the first fixed ear plate and the third fixed ear plate and are respectively connected to the upper ends of the guide rods on the corresponding sides.

9. A cap supply device according to claim 6, characterized in that: The power unit includes a drive motor and an electric control box, the electric control box is connected to the seat frame, the drive motor is arranged at the bottom of the conveying frame, the output shaft of the drive motor is transmission-connected to the roller located at the lower end of the conveying frame, and the drive motor is electrically connected to the electric control box.

10. A capping machine, comprising a main body, the main body being provided with a pre-sealing mechanism, the pre-sealing mechanism being used to cover the bottle cap to be packaged on the opening of the packaging bottle, characterized in that: It also includes the cover supply device according to any one of claims 1 to 9 and a slideway with a downward slanting trajectory, wherein the upper end of the slideway is connected to the top of the cover supply device, and the lower end of the slideway is connected to the pre-sealing mechanism.

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