Screening device for double-cover metal packaging tin

Abstract

The utility model provides a screening device for a double-cover metal packaging tin. The screening device comprises a conveying assembly, a guiding unit and a screening assembly. The conveying assembly comprises a conveying belt and two protection strips, and the two protection strips are both arranged above the conveying belt. The guiding unit comprises two guiding assemblies, each guiding assembly comprises a bearing seat and a guiding plate, the bearing seats are detachably arranged on the conveying assembly, and the guiding plates are arranged at the tops of the bearing seats in a sliding mode. The screening assembly comprises a mounting frame, a floating plate and a screening plate. A screening channel is arranged in the mounting frame, the floating plate is arranged in the screening channel in a liftable mode, and the screening plate is arranged below the floating plate. According to the screening device for the double-cover metal packaging tin, whether the double covers of the semi-finished packaging tin are overlapped or not can be detected and screened, and workers can distinguish the semi-finished packaging tin conveniently.

Description

Technical Field

[0001] The utility model belongs to the field of packaging equipment, in particular to a screening device for double-cover metal packaging cans. Background Art

[0002] In the existing technology, metal packaging cans mainly include two types: two-piece cans and three-piece cans. Among them, three-piece cans are can-shaped packaging containers formed by stamping the can body, top cover and bottom cover from three metal sheets separately, and then assembling and crimping them after the can body, top cover and bottom cover are processed.

[0003] Since both the top cover and the bottom cover are thin sheet structures, during assembly and crimping, two overlapping can covers are often pressed onto the can body at the same time, which seriously affects the sealing effect of the three-piece can.

[0004] However, traditional double-cap detection solutions (such as using double-cap detectors to check for overlapping can lids) are not only expensive but also require testing before the lids are crimped onto the can body. When manufacturers directly purchase semi-finished cans (i.e., cans with lids already crimped onto one end of the can body) for product filling, traditional double-cap detection solutions are unable to detect whether the semi-finished cans have overlapping lids. This can result in cans with overlapping lids being shipped to subsequent filling equipment, resulting in unnecessary financial losses. Utility Model Content

[0005] In view of this, the present invention aims to provide a screening device for double-lid metal packaging cans to solve the above technical problems.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0007] A screening device for double-lid metal packaging cans, comprising:

[0008] A conveying assembly, the conveying assembly comprising a conveyor belt and two guard bars, wherein the length direction of the guard bars is parallel to the material conveying direction of the conveyor belt, the two guard bars are arranged above the conveyor belt, a material channel is formed between the two guard bars, and a receiving channel connected to the material channel is formed between each guard bar and the conveyor belt;

[0009] The guide unit includes two guide assemblies, which are arranged in a mirror-image manner on both sides of the material channel, and each guide assembly includes a bearing seat and a guide plate; the bearing seat is detachably arranged on the conveying assembly, and the guide plate is slidably arranged on the top of the bearing seat, the sliding direction of the guide plate is perpendicular to the material conveying direction of the conveyor belt, and one end of the guide plate is inserted into the material channel along the accommodating channel;

[0010] A screening assembly, comprising: a mounting frame, a floating plate and a screening plate; the mounting frame is detachably arranged on the protective strip, a screening channel is provided inside the mounting frame, and the screening channel is connected to the material channel; the floating plate is liftably arranged inside the screening channel, the screening plate is arranged below the floating plate, a connecting rod is provided at one end of the floating plate, and the bottom end of the connecting rod is hinged to the top surface of the screening plate, a receiving hole is provided at the other end of the floating plate, and a slidable guide rod is provided inside the receiving hole; the bottom end of the guide rod is hinged to the top surface of the screening plate, and a limiting plate is also provided at the top end of the guide rod, and the outer diameter of the limiting plate is larger than the inner diameter of the receiving hole.

[0011] Furthermore, the conveyor belt is provided with a plurality of anti-skid grooves, the length direction of the anti-skid grooves is perpendicular to the material conveying direction of the conveyor belt, and an anti-skid strip is provided inside each anti-skid groove.

[0012] Furthermore, a positioning hole is provided on the guide plate, and a positioning bolt is provided inside the positioning hole; a guide oblong hole for accommodating the positioning bolt is provided on the bearing seat, and the length direction of the guide oblong hole is perpendicular to the material conveying direction of the conveyor belt.

[0013] Furthermore, a guiding inclined surface is provided on the top of the guide plate, and a material guiding arc surface is provided on the side wall of the guide plate.

[0014] Furthermore, an avoidance hole is provided on the top surface of the mounting frame, and the inner diameter of the avoidance hole is larger than the outer diameter of the limiting piece.

[0015] Furthermore, the avoidance hole and the accommodating hole are both oblong holes, and the length directions of the avoidance hole and the accommodating hole are parallel to the material conveying direction of the conveyor belt.

[0016] Furthermore, an adjusting screw is provided on the top of the floating plate, and a mounting hole for accommodating the adjusting screw is provided on the top surface of the mounting frame; two locking nuts are provided on the adjusting screw, and the two locking nuts are respectively located on the upper and lower sides of the top surface of the mounting frame.

[0017] Furthermore, an arc-shaped guide piece is provided at one end of the screening plate close to the guide rod, and the arc center of the arc-shaped guide piece faces the floating plate.

[0018] Furthermore, an intercepting groove is provided on the bottom surface of the screening plate, and the length direction of the intercepting groove is perpendicular to the material conveying direction of the conveyor belt.

[0019] Furthermore, the screening plate is provided with a weight-reducing cutout.

[0020] Compared with the prior art, the screening device for double-lid metal packaging cans described in the present invention has the following advantages:

[0021] The present invention discloses a screening device for double-lid metal packaging cans, comprising a guide unit and a screening assembly on a conveyor assembly. During operation, a worker can place semi-finished cans vertically on a conveyor belt for transport. As the semi-finished cans pass through the guide unit, the guide plates in the two guide assemblies contact the sidewalls of the cans, thereby detecting their diameters and ensuring that cans with acceptable diameters enter the screening assembly. Because the number of lids already pressed onto a semi-finished can directly affects its height, when a semi-finished can with only one lid enters the screening assembly, the top of the can avoids contact with the screening plates. This allows qualified cans to exit the screening assembly perpendicular to the conveyor belt. When a semi-finished can with overlapping lids enters the screening assembly, the top of the can contacts the screening plates, causing them to tilt and rotate about the hinge point at the bottom of the connecting rod. At this point, the tilted screening plate blocks the top of the semi-finished cans, causing them to tip over on the conveyor belt and leave the screening assembly in an upside-down position. The subsequent filling process allows staff to determine whether the semi-finished cans have overlapping lids based on their position on the conveyor belt, thus avoiding filling unqualified cans. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 This is a schematic structural diagram of a screening device for double-lid metal packaging cans according to an embodiment of the present utility model;

[0024] Figure 2 This is an exploded view of the screening device for double-lid metal packaging cans according to an embodiment of the present utility model;

[0025] Figure 3 This is an exploded view of the guide unit according to an embodiment of the present utility model;

[0026] Figure 4 This is an exploded view of the screening assembly according to an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the bottom structure of the screening plate according to an embodiment of the present utility model;

[0028] Figure 6 This is a cross-sectional view of the screening device for double-lid metal packaging cans according to an embodiment of the present utility model (a qualified packaging can passes through the screening assembly);

[0029] Figure 7 This is a cross-sectional view of the screening device for double-lid metal packaging cans according to an embodiment of the present utility model (a state in which unqualified packaging cans pass through the screening assembly).

[0030] Description of reference numerals:

[0031] 1- conveyor belt; 11- protection strip; 12- anti-slip strip; 2- bearing seat; 21- guide oblong hole; 3- guide plate; 31- positioning bolt; 32- guide slope; 33- guide arc surface; 4- mounting frame; 41- avoidance hole; 42- mounting hole; 5- floating plate; 51- connecting rod; 52- receiving hole; 53- adjusting screw; 531- locking nut; 6- screening plate; 61- arc guide plate; 62- intercepting groove; 63- weight-reducing incision; 7- guide rod; 71- limiting plate; 8- semi-finished product packaging can. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0034] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0035] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0036] A screening device for double-cover metal packaging cans, the structure of which can be Figures 1-7 Schematic diagram. In this embodiment, the screening device for double-lid metal packaging cans includes: a conveying assembly, a guide unit, and a screening assembly, with both the guide unit and the screening assembly mounted on the conveying assembly. During use, the conveying assembly transports semi-finished packaging cans 8, the guide unit detects and screens the diameter of the semi-finished packaging cans 8, and the screening assembly detects and screens the height of the semi-finished packaging cans 8. This ensures that qualified semi-finished packaging cans 8 are delivered to subsequent equipment in an upright position, while semi-finished packaging cans 8 with overlapping double lids are delivered to subsequent equipment in an inverted position.

[0037] Specifically, in this embodiment, the conveyor assembly includes a conveyor belt 1 and two protective strips 11. The length of the protective strips 11 is parallel to the material conveying direction of the conveyor belt 1. Both protective strips 11 are positioned above the conveyor belt 1, forming a material channel between the two protective strips 11. Furthermore, a receiving channel connected to the material channel is formed between each protective strip 11 and the conveyor belt 1. During operation, a worker can place a semi-finished product packaging can 8 into the material channel and position it vertically on the conveyor belt 1. The movement of the conveyor belt 1 allows the semi-finished product packaging can 8 to move within the material channel.

[0038] The guiding unit includes two guiding components, such as Figure 2 As shown, two guide assemblies are arranged in mirror image on either side of the material channel, each comprising a bearing seat 2 and a guide plate 3. During assembly, the bearing seat 2 is removably attached to the conveyor assembly using bolts, and the guide plate 3 is slidably positioned atop the bearing seat 2. After assembly, the guide plate 3 should slide perpendicular to the material conveying direction of the conveyor belt 1, with one end of the guide plate 3 inserted into the material channel along the receiving channel.

[0039] Before use, since the guide plates 3 can slide, staff can adjust the positions of the two guide plates 3 according to actual needs, so that the distance between the two guide plates 3 matches the maximum diameter of qualified cans. When the semi-finished cans 8 pass through the guide unit with the movement of the conveyor belt, the guide plates 3 in the two guide assemblies will contact the side walls of the semi-finished cans 8. At this time, semi-finished cans 8 with diameters smaller than the maximum diameter of qualified cans will pass through the guide unit smoothly, while cans 8 with diameters larger than the maximum diameter of qualified cans will be intercepted outside the guide unit, thus completing the diameter detection and screening of the semi-finished cans 8 by the device.

[0040] Optionally, to enable the guide plate 3 to slide, as Figure 3As shown, in this embodiment, the guide plate 3 may be provided with a positioning hole, within which a positioning bolt 31 is installed. Accordingly, the support base 2 should be provided with a guide oblong hole 21, the length of which is perpendicular to the material conveying direction of the conveyor belt 1. During assembly, a worker can insert the positioning bolt 31 into the guide oblong hole 21 to facilitate sliding the guide plate 3 along the length of the guide oblong hole 21. After the guide plate 3 slides to a desired position, a worker can install a nut on the positioning bolt 31. By tightening the nut, the positioning bolt 31 is restricted in its position within the guide oblong hole 21, thereby preventing the guide plate 3 from sliding abnormally during use.

[0041] As an optional implementation of this embodiment, in order to facilitate the semi-finished packaging cans 8 on the conveyor belt 1 to smoothly enter between the two guide components, a material guide arc surface 33 can be provided on the side wall of the guide plate 3, so that the semi-finished packaging cans 8 can be guided by means of the material guide arc surface 33.

[0042] Since the number of can lids on the semi-finished packaging can 8 will directly affect the height of the semi-finished packaging can 8 (the more can lids pressed onto the semi-finished packaging can 8, the greater its height), in order to facilitate the screening of semi-finished packaging cans 8 with double-lid overlap, the screening assembly in this embodiment includes: a mounting frame 4, a floating plate 5 and a screening plate 6. Figure 1 、 Figure 2 and Figure 4 As shown, a screening channel is provided inside the mounting frame 4, a floating plate 5 is arranged inside the screening channel in a liftable manner, a screening plate 6 is arranged below the floating plate 5, a connecting rod 51 is provided at one end of the floating plate 5, and a receiving hole 52 is provided at the other end of the floating plate 5, a slidable guide rod 7 is provided inside the receiving hole 52, and a limiting piece 71 with an outer diameter larger than the inner diameter of the receiving hole 52 is provided at the top end of the guide rod 7.

[0043] During assembly, the staff can detachably install the mounting frame 4 on the protective strip 11 with bolts to connect the screening channel with the material channel, and the bottom ends of the connecting rod 51 and the guide rod 7 should be hinged to the top surface of the screening plate 6 respectively. During use, the staff can drive the floating plate 5 up and down according to the height of the qualified packaging cans, so that the distance between the screening plate 6 and the conveyor belt 1 matches the height of the qualified packaging cans. Figure 6 As shown in FIG, when a semi-finished packaging can 8 with only one can lid pressed on it passes through the screening assembly, the top of the semi-finished packaging can 8 does not come into contact with the screening plate 6, so that the semi-finished packaging can 8 leaves the screening assembly in a posture perpendicular to the conveyor belt 1. Figure 7As shown in FIG. 1 , when an unqualified semi-finished product packaging can 8 with double-cover overlap problem enters the screening assembly, the semi-finished product packaging can 8 becomes taller due to the double-cover overlap problem, so the top of the semi-finished product packaging can 8 will come into contact with the screening plate 6. At this time, the screening plate 6 will flip around the hinge point at the bottom end of the connecting rod 51 under the impact of the semi-finished product packaging can 8. When the screening plate 6 enters the screening assembly, the semi-finished product packaging can 8 will be tilted. Figure 7 In the tilted position shown, the screening plate 6 blocks the top of the semi-finished can 8. In this state, the conveying action of the conveyor belt 1 exerts a force on the bottom of the semi-finished can 8, causing it to topple over and eventually leave the screening assembly in a tilted position. Therefore, personnel near subsequent equipment can determine whether the semi-finished can 8 has a double-lid overlap problem based on its position on the conveyor belt 1, thereby preventing material from being filled into unqualified cans with double-lid overlap. Accordingly, when an unqualified can topples over, the screening plate 6 resets under the action of gravity, and the limiter 71 prevents the guide rod 7 from separating from the receiving hole 52 during the reset process, allowing the screening assembly to inspect and screen subsequent semi-finished cans 8.

[0044] To realize the lifting action of the floating plate 5, as shown in FIG. Figure 4 As shown, the top of the floating plate 5 may be provided with an adjustment screw 53, which is equipped with two locking nuts 531. A mounting hole 42 for accommodating the adjustment screw 53 is provided on the top surface of the mounting frame 4. During assembly, a worker inserts the adjustment screw 53 into the mounting hole 42 and positions the two locking nuts 531 on the upper and lower sides of the top surface of the mounting frame 4. When the height of the screening plate 6 needs to be adjusted, the worker loosens the two locking nuts 531 to allow the adjustment screw 53 to slide within the mounting hole 42, thereby raising or lowering the floating plate 5. Once the screening plate 6 is adjusted to the desired height, the worker tightens the two locking nuts 531 to prevent the adjustment screw 53 from sliding abnormally within the mounting hole 42.

[0045] Optionally, in order to ensure that the semi-finished product packaging cans 8 with double-cover overlap problems can be smoothly dumped inside the screening assembly, in this embodiment, a plurality of anti-skid grooves with a length direction perpendicular to the material conveying direction of the conveyor belt 1 can be provided on the conveyor belt 1, and an anti-skid strip 12 is provided inside each anti-skid groove, thereby increasing the friction resistance between the conveyor belt 1 and the bottom end of the semi-finished product packaging cans 8 with the help of the anti-skid strip 12. Figure 5 As shown, the device may also be provided with an intercepting groove 62 on the bottom surface of the screening plate 6, the length direction of which is perpendicular to the material conveying direction of the conveyor belt 1, so that the top of the unqualified semi-finished product packaging can 8 is stuck in the intercepting groove 62, thereby improving the blocking effect of the screening plate 6 on the top of the semi-finished product packaging can 8, and facilitating the cooperation with the movement of the conveyor belt 1 to cause the semi-finished product packaging can 8 to tip over.

[0046] In addition, the present device can be provided with an arc-shaped guide piece 61 on the end of the screening plate 6 near the guide rod 7, with the arc center facing the floating plate 5. This arc-shaped guide piece 61 reduces the difficulty of the semi-finished product packaging can 8 lifting the screening plate 6. At the same time, the present device can also be provided with a weight-reducing notch 63 on the screening plate 6 to reduce the weight of the screening plate 6 and further improve the movement sensitivity of the screening plate 6.

[0047] As another optional feature of this embodiment, to ensure that the semi-finished cans 8 land accurately on the conveyor belt 1 during the pouring process, a guide ramp 32 may be provided on the top of the guide plate 3. Because the two guide assemblies in this device are arranged in mirror image on either side of the material channel, the guide ramps 32 in each guide assembly form a V-shaped guide structure with an upward opening within the material channel. When the semi-finished cans 8 pour, the two guide ramps 32 guide the cans 8 during the pouring process, ensuring that the top of the semi-finished cans 8 land smoothly on the conveyor belt 1, facilitating their transport.

[0048] In actual operation, because packaging cans of different sizes have different height dimensions, to enhance the adaptability of this device, a relief hole 41 with an inner diameter larger than the outer diameter of the stopper 71 can be provided on the top surface of the mounting frame 4. This ensures that the top end of the guide rod 7 has sufficient upward travel when the screening plate 6 is turned. Furthermore, both the relief hole 41 and the receiving hole 52 in this device should be oblong, with their lengths parallel to the material conveying direction of the conveyor belt 1. This allows the guide rod 7 to slide along the length of the relief hole 41 during the movement of the screening plate 6, avoiding dead spots in the screening assembly.

[0049] The following describes the effects of the above scheme:

[0050] This embodiment provides a screening device for double-lid metal packaging cans. This device uses a guide unit to screen the diameter specifications of semi-finished packaging cans, ensuring that cans with qualified diameters enter the screening assembly. Furthermore, the device uses the screening assembly to detect whether semi-finished packaging cans have overlapping lids. This allows qualified semi-finished packaging cans to exit the screening assembly smoothly, perpendicular to the conveyor belt, while unqualified semi-finished packaging cans exit the screening assembly in an overturned position. This facilitates personnel's ability to determine whether a semi-finished packaging can has overlapping lids based on its position, preventing the filling of unqualified cans.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A screening device for double-lid metal packaging cans, characterized in that: include: A conveying assembly, the conveying assembly comprising a conveyor belt (1) and two protection strips (11), the length direction of the protection strips (11) being parallel to the material conveying direction of the conveyor belt (1), the two protection strips (11) being arranged above the conveyor belt (1), a material channel being formed between the two protection strips (11), and a receiving channel being formed between each protection strip (11) and the conveyor belt (1) and communicating with the material channel; A guide unit, the guide unit comprising two guide assemblies, the two guide assemblies being arranged in a mirror image on both sides of a material channel, and each guide assembly comprising a bearing seat (2) and a guide plate (3); the bearing seat (2) being detachably arranged on the conveying assembly, the guide plate (3) being slidably arranged on the top of the bearing seat (2), the sliding direction of the guide plate (3) being perpendicular to the material conveying direction of the conveyor belt (1), and one end of the guide plate (3) being inserted into the interior of the material channel along the accommodating channel; A screening assembly, comprising: a mounting frame (4), a floating plate (5) and a screening plate (6); the mounting frame (4) is detachably arranged on a protective strip (11); a screening channel is provided inside the mounting frame (4), and the screening channel is communicated with a material channel; the floating plate (5) is movably arranged inside the screening channel; the screening plate (6) is arranged below the floating plate (5); a connecting rod (51) is provided at one end of the floating plate (5), and the bottom end of the connecting rod (51) is hinged to the top surface of the screening plate (6); a slidable guide rod (7) is provided inside the accommodating hole (52); the bottom end of the guide rod (7) is hinged to the top surface of the screening plate (6); a limiting piece (71) is further provided at the top end of the guide rod (7), and the outer diameter of the limiting piece (71) is larger than the inner diameter of the accommodating hole (52).

2. The screening device for double-lid metal packaging cans according to claim 1, characterized in that: The conveyor belt (1) is provided with a plurality of anti-skid grooves, the length direction of the anti-skid grooves is perpendicular to the material conveying direction of the conveyor belt (1), and an anti-skid strip (12) is provided inside each anti-skid groove.

3. The screening device for double-lid metal packaging cans according to claim 1, characterized in that: The guide plate (3) is provided with a positioning hole, and a positioning bolt (31) is provided inside the positioning hole; the bearing seat (2) is provided with a guide oblong hole (21) for accommodating the positioning bolt (31), and the length direction of the guide oblong hole (21) is perpendicular to the material conveying direction of the conveyor belt (1).

4. The screening device for double-lid metal packaging cans according to claim 1, characterized in that: A guide slope (32) is provided on the top of the guide plate (3), and a material guiding arc surface (33) is provided on the side wall of the guide plate (3).

5. The screening device for double-lid metal packaging cans according to claim 1, characterized in that: A relief hole (41) is provided on the top surface of the mounting frame (4), and the inner diameter of the relief hole (41) is larger than the outer diameter of the limiting piece (71).

6. The screening device for double-lid metal packaging cans according to claim 5, characterized in that: The avoidance hole (41) and the accommodating hole (52) are both oblong holes, and the length directions of the avoidance hole (41) and the accommodating hole (52) are parallel to the material conveying direction of the conveyor belt (1).

7. The screening device for double-lid metal packaging cans according to claim 1, characterized in that: An adjusting screw (53) is provided on the top of the floating plate (5), and a mounting hole (42) for accommodating the adjusting screw (53) is provided on the top surface of the mounting frame (4); two locking nuts (531) are provided on the adjusting screw (53), and the two locking nuts (531) are respectively located on the upper and lower sides of the top surface of the mounting frame (4).

8. The screening device for double-lid metal packaging cans according to claim 1, characterized in that: An arc-shaped guide piece (61) is provided at one end of the screening plate (6) close to the guide rod (7), and the arc center of the arc-shaped guide piece (61) faces the floating plate (5).

9. The screening device for double-lid metal packaging cans according to claim 1, characterized in that: An intercepting groove (62) is provided on the bottom surface of the screening plate (6), and the length direction of the intercepting groove (62) is perpendicular to the material conveying direction of the conveyor belt (1).

10. The screening device for double-lid metal packaging cans according to claim 1, characterized in that: The screening plate (6) is provided with a weight-reducing cutout (63).

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