An automatic can lid detection device

Abstract

The present invention discloses an automatic can lid detection device, belonging to the field of packaging detection. The automatic can lid detection device of the present invention includes a frame and a tab detection mechanism, a steering and positioning mechanism, and a lid taking mechanism provided on the frame; the tab detection mechanism includes a first sealing device, a first fixing device, a pressure applicator, and an opening device for pulling the tab on the can lid by pulling the pull ring on the can lid; the steering and positioning mechanism includes a positioning rod and a positioning seat for placing the can lid; the end of the positioning rod has a positioning block protruding towards the positioning seat; the positioning seat and the positioning rod are configured to be relatively rotatable, and during the relative rotation, the positioning block blocks or pushes against the pull ring of the can lid to achieve can lid positioning; the lid taking mechanism is used for taking and placing the lid; the automatic can lid detection device of the present invention can perform can lid tab detection, can also perform can lid pressure resistance and deformation detection, and at the same time can connect the actions during the detection process through mechanical linkage, has the function of can lid steering and positioning, and does not require manual can lid positioning, with high efficiency.

Description

Technical Field

[0001] The present invention relates to the field of packaging detection, and particularly to an automatic can lid detection device. Background Art

[0002] In the field of production and manufacturing of pop-top cans, generally, detection equipment is used to conduct relevant special detections on the can body, the can bottom, the can lid, etc., to ensure the stability and safety of the pop-top can packaging.

[0003] However, the automatic can lid detection equipment in the prior art has the following defects:

[0004] (1) Pop-top cans are widely used as packaging for beer, beverages, etc. A pop-top can includes a can body and a can lid. The can lid includes a lid body, a pull ring, a pull tab, a score line, and a rivet. The pull tab is connected to the lid body through the score line; when a consumer needs to drink the liquid in the can, pulling the pull ring can cause the pull tab to separate from the lid body at the score line; however, since pop-top cans are generally used for filling beer and carbonated beverages, and affected by transportation or temperature, the pressure inside the can body is likely to increase. When the pressure inside the can increases, when the consumer pulls the pull ring, due to the internal pressure, the pull ring and / or the pull tab are likely to fly off; when the pull tab flies up, it is likely to cut the consumer's eyes; when the pull ring flies up, it is likely to cause the connection between the pull ring and the pull tab to come off, resulting in the inability to smoothly pull the pull tab. There is no suitable detection equipment in the prior art that can be used to simulate the detection of whether the pull tab of the can lid is likely to cause the pull ring and / or the pull tab to fly off when the pressure inside the can increases.

[0005] (2) In addition, if the detection equipment is to simulate the process of manually pulling the pull tab, the operator needs to manually place the can lid on the detection station, and then precisely adjust the direction of the can lid so that the position of the pull ring on the can lid is close to the opening device on the detection equipment used to simulate manually pulling the pull ring, in order to ensure that the opening device can hook or connect to the pull ring; at this time, several operations such as placing the can lid and adjusting the can lid during the detection process need to be manually operated, and the detection process is troublesome and labor-consuming. Summary of the Invention

[0006] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide an automatic can lid detection device that can not only realize the detection of the can lid pull tab but also realize the can lid turning and positioning function before automatic can lid detection.

[0007] The purpose of the present invention is achieved by adopting the following technical solutions:

[0008] An automatic can lid detection device includes a frame and a pull tab detection mechanism, a turning and positioning mechanism, and a can lid picking mechanism provided on the frame;

[0009] The tab detection mechanism includes a first sealing device for cooperating with the can lid to form a pressurized chamber, a first fixing device for fixing the can lid to the first sealing device, a pressure applicator for pressurizing the pressurized chamber, and an opening device for pulling the pull ring on the can lid to open the tab on the can lid;

[0010] The steering and positioning mechanism includes a positioning rod and a positioning seat for placing the can lid; the end of the positioning rod has a positioning block protruding towards the positioning seat; the positioning seat and the positioning rod are configured to be relatively rotatable, and during the relative rotation, the positioning block abuts against the tab on the can lid to hold the can lid in the positioning position, or the positioning block pushes against the tab on the can lid to push the can lid to the positioning position;

[0011] The lid taking mechanism is used to pick up the can lid from the area to be inspected and send it to the steering and positioning mechanism, and then grab the can lid along a fixed route to the tab detection mechanism.

[0012] Further, it further includes a pressure-resistant deformation detection mechanism; the pressure-resistant deformation detection mechanism includes a second sealing device, a second fixing device, a pressure applicator, and a deformation measuring device; the second sealing device is used to place the can lid and cooperate with the can lid to form a pressurized chamber, the second fixing device is used to cooperate with the second sealing device to fix the can lid, the pressure applicator is used to pressurize the pressurized chamber, and the deformation measuring device is on the side away from the pressurized chamber, so as to measure the deformation of the can lid when pressurizing in the pressurized chamber.

[0013] Further, the deformation measuring device includes a probe mounting seat connected to the second fixing device and a micrometer connected to the probe mounting seat; the micrometer includes a micrometer head and a telescopic member, and the telescopic member is used to drive the micrometer head to move towards the direction close to the can lid, so that the micrometer head abuts against the can lid.

[0014] Further, both the first sealing device and the second sealing device include a sealing seat with a groove and a sealing gasket arranged on the sealing seat; both the first fixing device and the second fixing device include a gland cylinder and a gland connected to the gland cylinder;

[0015] When detection is required, the gland presses the can lid tightly with the sealing gasket to fix the can lid at the detection station, and forms the pressurized chamber between the can lid and the groove; a upper pressure plate and a connecting column are sequentially connected between the gland cylinder of the first fixing device and the gland, so as to leave a space between the upper pressure plate and the gland, and the space is used to provide an installation working space for the opening device.

[0016] Further, the lid taking mechanism includes a column, a lid taking assembly, a lifting assembly and a rotary driving device. The lid taking assembly includes a lid taking arm, a vacuum chuck disposed on the lid taking arm, and a vacuum generator for providing suction force to the vacuum chuck. When the vacuum generator is turned on, the vacuum chuck can suck the can lid.

[0017] One end of the lid taking arm away from the vacuum chuck is slidably connected to the column. The lifting assembly includes a lifting driving device and a supporting block connected to the lifting drive. When the supporting block is driven to rise, it supports the lid taking arm to rise. When the supporting block descends, the lid taking arm slides down along the column under the action of its own weight.

[0018] The rotating shaft of the rotary driving device is connected to the column to drive the column to rotate, and further drive the lid taking arm to rotate to different positions for lid taking or lid placing.

[0019] Furthermore, it further includes at least one can lid placement bin. Each can lid placement bin includes at least three positioning rods connected to the frame, and a stack area of to-be-inspected can lids is formed between the positioning rods.

[0020] Further, the can lid placement bin further includes a lid seat disposed on the frame. The positioning rods are arranged on the lid seat, and the lid seat is used to support the can lid. An optoelectronic detection switch is also installed on the lid seat to detect whether a can lid is placed in the can lid placement bin.

[0021] Furthermore, several of the can lid placement bins, the steering and positioning mechanism, and the tab detector are arranged in sequence along the direction of the rotation arc of the lid taking arm.

[0022] Further, it further includes a lid discharging mechanism. The lid discharging mechanism includes a lid flipping driving device, a flipping block, a platform plate and a lid pushing assembly.

[0023] The lid flipping driving device is fixedly arranged on the frame. The flipping driving device has a rotating shaft, the rotating shaft is connected to the flipping block, and the bottom of the flipping block is connected to the platform plate. The groove of the sealing seat is a sealing through groove, and the platform plate has an installation through groove. The lid pushing assembly includes a lid pushing cylinder fixedly connected to the platform plate, and further includes a lid pushing block connected to the lid pushing cylinder. The lid pushing block passes through the installation through groove and the sealing through groove in sequence.

[0024] The lid flipping driving device is used to flip the platform plate, and the lid pushing assembly is used to cooperate with the lid flipping driving device to push the can lid out of the sealing device for lid discharging.

[0025] Furthermore, it also includes a discharge mechanism; the discharge mechanism includes a discharge bin arranged obliquely, an outlet baffle arranged in the discharge bin to divide the discharge bin into two discharge channels, a toggle cylinder arranged outside the discharge bin, a swing rod connected to the telescopic rod of the toggle cylinder, a swing shaft connected to the swing rod, and a toggle plate arranged in the discharge bin and connected to the other end of the swing shaft;

[0026] A cover inlet is provided on the top of the discharge bin, and the cover inlet is connected to the cover discharge mechanism; when the toggle cylinder extends or retracts, it drives the toggle plate to move left or right, so that the can cover is discharged to the right or left side of the outlet baffle.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] (1) A pull-tab detection mechanism is provided, which simulates the action of "when the internal pressure of the can package is high, the consumer pulls the pull ring to open the pull tab" through the cooperation of the sealing device, the fixing device and the opening device, so as to realize the pull-tab detection step of the can lid at the detection station;

[0029] (2) The automatic can lid inspection equipment is also provided with a steering positioning mechanism and a lid removal mechanism to cooperate with the pull-tab inspection mechanism so as to connect the inspection actions such as lid removal, lid direction adjustment, lid placement, fixing, pressurization, and opening, etc., without manual special lid adjustment operations, thereby effectively improving the inspection efficiency;

[0030] (3) The automatic can cover inspection device has a pressurizing function. Based on this structure, it is possible to perform a can cover pressure resistance deformation inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the automatic can cover detection equipment of the present invention;

[0032] Figure 2 It is a top view of the automatic can cover detection device of the present invention;

[0033] Figure 3 It is a partial structural schematic diagram of the automatic can cover detection equipment of the present invention (including a first sealing device, a second sealing device, and a cover removal mechanism);

[0034] Figure 4 It is a three-dimensional schematic diagram of a partial structure of the automatic can cover detection device of the present invention (including a first sealing device, a second sealing device, and a cover removal mechanism);

[0035] Figure 5 It is a partial structural schematic diagram of the automatic can cover detection equipment of the present invention;

[0036] Figure 6 It is a schematic diagram of the hook arm structure of the pull-tab detection mechanism of the present invention;

[0037] Figure 7 Schematic diagram of the tab detection mechanism of the present invention (the first sealing device is not shown);

[0038] Figure 8 Schematic diagram of the structure of the pressure-resistant deformation detection mechanism of the present invention (the second sealing device is not shown);

[0039] Figure 9 is Figure 8 cross-sectional view;

[0040] Figure 10 Schematic diagram of the structure of the steering positioning mechanism of the present invention;

[0041] Figure 11 Schematic diagram of the cooperation between the positioning rod and the positioning seat of the steering positioning mechanism of the present invention;

[0042] Figure 12 Schematic diagram of the positioning principle of the can lid by the steering positioning mechanism of the present invention;

[0043] Figure 13 Stereoscopic structure diagram of the lid taking mechanism of the present invention;

[0044] Figure 14 Side view of the lid taking mechanism of the present invention;

[0045] Figure 15 Stereoscopic structure diagram of the lid discharging mechanism of the present invention;

[0046] Figure 16 Internal structure diagram of the lid discharging mechanism of the present invention;

[0047] In the figure: 10, tab detection mechanism; 11, first sealing device; 13, opening device; 131, hook arm; 1311, hook portion; 132, pulling device; 133, pushing device; 20, steering and positioning mechanism; 21, positioning rod; 211, positioning block; 22, positioning seat; 23, first driving device; 24, second driving device; 30, lid taking mechanism; 31, column; 32, lid taking assembly; 321, lid taking arm; 3211, vacuum suction cup; 322, vacuum generator; 331, lifting driving device; 332, supporting block; 34, rotating driving device; 40, pressure-resistant deformation detection mechanism; 41, second sealing device; 43, deformation measuring device; 431, probe mounting seat; 432, micrometer; 50, can lid placement bin; 51, positioning rod; 52, lid seat; 60, lid discharging mechanism; 61, lid flipping driving device; 62, flipping block; 63, platform plate; 641, lid pushing cylinder; 642, lid pushing block; 70, discharging mechanism; 71, discharging bin; 72, outlet baffle; 73, toggling cylinder; 74, swing rod; 75, toggling plate; 811, sealing seat; 812, sealing gasket; 821, lid pressing cylinder; 822, upper pressing plate; 823, connecting column; 824, lid pressing block; 83, pressurizing chamber; 90, can lid. Detailed implementation manners

[0048] Next, in combination with the accompanying drawings and specific implementation manners, the present invention will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined with each other to form new embodiments.

[0049] In the description of the invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "vertical", "top", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the invention and simplifying the description, 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 construed as a limitation of the invention.

[0050] In the description of the invention, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be fixedly connected, can be detachably connected, or integrally connected; it can be mechanically connected, can be electrically connected; it can be directly connected, or can be indirectly connected through an intermediate medium, or the internal communication of two elements.

[0051] As Figures 1 - 16As shown in the figure, this embodiment provides an automatic can lid detection device, including a device frame, and further including a tab detection mechanism 10, a steering and positioning mechanism 20, and a lid picking mechanism 30 provided on the frame; wherein, the tab detection mechanism 10 includes a first sealing device 11 for cooperating with the can lid 90 to form a pressurized chamber 83, a first fixing device for fixing the can lid 90 to the first sealing device 11, a pressure booster for pressurizing the pressurized chamber 83, and an opening device 13 for pulling the tab on the can lid 90 to open the can lid 90. The opening device 13 has a hook portion 1311 for hooking the tab; wherein, the steering and positioning mechanism 20 includes a positioning rod 21 and a positioning seat 22 for placing the can lid 90; the end of the positioning rod 21 has a positioning block 211 protruding towards the positioning seat 22; the positioning seat 22 and the positioning rod 21 are configured to be relatively rotatable. During the relative rotation, the positioning block 211 abuts against the tab on the can lid 90 to hold the can lid 90 in the positioning position, or the positioning block 211 pushes against the tab on the can lid 90 to turn the can lid 90 to the positioning position; wherein, the lid picking mechanism 30 is used to pick up the can lid 90 from the area to be inspected and send it to the steering and positioning mechanism 20, and then grab it to the tab detection mechanism 10 along a fixed route. Among them, the fixed route in this embodiment is a circular route with a fixed arc length. In some other embodiments, the fixed route can also be a fixed broken line route.

[0052] It should be noted that in this embodiment, the positioning of the can lid 90 refers to adjusting and rotating the direction towards which the end of the tab away from the rivet faces to a preset direction. At this time, the can lid 90 is in the positioning position. And how those skilled in the art make the lid picking mechanism 30 grab the can lid 90 to the tab detection mechanism 10 along a fixed route can generally be achieved by using a rotational driving device or a combination of multiple linear driving devices. Those skilled in the art can set the driving device of the lid picking mechanism 30 and operate the driving device according to actual needs to enable the lid picking mechanism 30 to grab the can lid 90 to the detection mechanism along a fixed route.

[0053] Preferably, the steering and positioning mechanism 20 further includes a first driving device 23 for driving the positioning rod 21 or the positioning seat 22 to rotate. In some other embodiments, two driving devices can also be provided to drive the positioning rod 21 and the positioning seat 22 to rotate respectively, as long as the positioning rod 21 and the positioning seat 22 can rotate relatively, so that during the relative rotation, the positioning rod 21 blocks or pushes against the tab of the can lid 90.

[0054] Preferably, the steering and positioning mechanism 20 further includes a second driving device 24. The first driving device 23 is used to drive the positioning rod 21 or the positioning seat 22 to rotate, and the second driving device 24 is used to drive the positioning seat 22 or the positioning rod 21 to move to facilitate lid placement. In this embodiment, the first driving device 23 is a single-phase motor disposed below the positioning seat 22 and connected to the positioning seat 22, and the second driving device 24 is a rotary cylinder connected to the frame to drive the positioning rod 21 to rotate. As Figure 10 shown, the rotation of the rotary cylinder can drive the positioning rod 21 to rotate around a horizontal rotation axis away from the positioning seat 22, without blocking the lid placing mechanism 30 from placing the lid on the positioning seat 22. When the lid placing action is completed, the rotary cylinder drives the positioning rod 21 to rotate in the direction approaching the positioning seat 22 until it reaches the position, and at this time, the single-phase motor drives the positioning seat 22 to rotate around a vertical rotation axis to position the can lid 90.

[0055] Preferably, to adapt to the detection of sample can lids 90 with different diameters, a matching positioning seat 22 needs to be replaced on the steering and positioning mechanism 20. The positioning seat 22 is convenient to replace. It can be quickly replaced after being picked up by hand, and it is connected to the first driving device 23 through a square flat position to transmit the rotational torque.

[0056] The working principle of the automatic can lid detection device in this embodiment is as follows:

[0057] Using a lid-taking mechanism 30 with the functions of sucking (or grasping) and releasing, the can lid 90 is grabbed or sucked from the area to be inspected to the steering and positioning mechanism 20; after the lid-taking mechanism 30 places the can lid 90 on the positioning seat 22, the positioning seat 22 rotates around its vertical central axis, while the positioning rod 21 does not rotate; during the relative rotation process, if the positioning block 211 touches the relatively protruding pull ring on the can lid 90, the can lid 90 is subjected to the frictional force between the can lid 90 and the positioning seat 22, and the can lid 90 continues to rotate with the positioning seat 22; when the positioning block 211 abuts against the pull ring, the pull ring is blocked by the positioning block 211, and the positioning block 211 blocks and holds the can lid 90 in the current position. At this time, the can lid 90 does not continue to rotate with the positioning seat 22, so that the direction in which the pull ring of the can lid 90 faces does not change, that is, the positioning of the can lid 90 is completed, and the orientation of the pull ring on the can lid 90 is stably fixed at that position without change; and since the relative position between the steering and positioning mechanism 20 and the tab detection mechanism 10 is determined, by using the lid-taking mechanism 30 to rotate along a fixed arc path to grab the can lid 90 from the steering positioning seat 22 to the tab detection mechanism 10, the orientation of the pull ring of the can lid 90 placed on the detection station of the tab detection mechanism 10 is only related to the setting of the steering and positioning mechanism 20. Those skilled in the art can set the specific parameters of the steering and positioning mechanism 20 (such as: the number of turns and the rotation angle of the positioning seat 22 or the positioning rod 21) according to the specific requirements of the detection, so as to make the pull ring of the can lid 90 placed on the detection station by the lid-taking mechanism 30 exactly face the hook part 1311 on the opening device 13.

[0058] In some other embodiments, the principle of using the steering and positioning mechanism 20 to position the can lid 90 is as follows: the positioning seat 22 does not rotate, while the positioning rod 21 rotates around the vertical central axis of the positioning seat 22, then the positioning block 211 on the positioning rod 21 will push the can lid 90, driving the can lid 90 to rotate relative to the positioning seat 22 as well. When the positioning rod 21 stops rotating, the can lid 90 stops at the positioning position.

[0059] The automatic can lid inspection equipment has the following advantages: (1) by setting a sealing device, a pressurized chamber 83 can be formed in cooperation with the can lid 90; and by cooperating with the sealing device through a fixing device, the can lid 90 can be fixed at the inspection station; on this basis, by cooperating with the opening device 13 to pull the pull ring, it can simulate the opening of the pull tab by hand; through the above-mentioned setting, it can simulate the situation that when the internal pressure of the can package is relatively large, the consumer pulls the pull ring to open the pull tab; it can realize the sampling inspection of the can lid 90, monitor whether the pull ring and / or pull tab will fly off when being pulled due to the internal pressure, so as to detect the connection reliability of the can lid 90 pull ring, pull tab and can lid 90 body under the action of internal pressure; (2) by the steering positioning mechanism 20 , the cooperation between the cover removing mechanism 30 and the pull-tab detection mechanism 10 can, in a reliable and practical manner, rotate the can cover 90 placed in any direction to the pull-tab orientation that meets the test requirements, and can ensure that the pull-tab on the can cover 90 sent to the pull-tab detection station can be quickly and correctly pulled up by the hook portion 1311 of the opening device 13; so that the detection actions such as removing the cover, adjusting the direction of the can cover 90, placing the cover, fixing, pressurizing, and opening can be connected. Even if the pull-tab orientation of the can cover 90 sucked by the cover removing mechanism 30 is inconsistent each time, there is no need to manually perform special can cover 90 adjustment operations, which effectively improves the detection efficiency; (3) The automatic can cover detection equipment has a pressurizing function. Based on this structure, the pressure deformation detection of the can cover 90 can be performed.

[0060] Preferably, in order to integrate multiple detection functions on one device and improve detection efficiency, the automatic can lid detection device of this embodiment also includes a pressure-resistant deformation detection mechanism 40 . The pressure-resistant deformation detection mechanism 40 of this embodiment is arranged next to the pull-tab detection mechanism 10 .

[0061] Specifically, the pressure-resistant deformation detection mechanism 40 includes a second sealing device 41, a second fixing device, a pressurizer and a deformation measuring device 43; the second sealing device 41 is used to place the tank cover 90 and to cooperate with the tank cover 90 to form a pressurized chamber 83, the second fixing device is used to cooperate with the second sealing device 41 to fix the tank cover 90, the pressurizer is used to pressurize the pressurized chamber 83, and the deformation measuring device 43 abuts against the side of the tank cover 90 away from the pressurized chamber 83, thereby measuring the deformation of the tank cover 90 when the pressurized chamber 83 is pressurized.

[0062] Preferably, the deformation measuring device 43 includes a probe mounting seat 431 connected to the second fixing device and a micrometer 432 connected to the probe mounting seat 431; the micrometer 432 includes a micrometer head and a telescopic member, and the telescopic member is used to drive the micrometer head to move toward the direction close to the tank cover 90 so that the micrometer head abuts against the tank cover 90. In some other embodiments, the deformation measuring device 43 can be a grating ruler measurement component.

[0063] Preferably, both the first sealing device 11 and the second sealing device 41 include a sealing seat 811 with a groove and a sealing gasket 812 provided on the sealing seat 811; both the first fixing device and the second fixing device include a gland cylinder 821 and a gland 824 connected to the gland cylinder 821; when detection is required, the gland 824 presses the can lid 90 against the sealing gasket 812 to fix the can lid 90 to the detection station and form a pressurized chamber 83 between the can lid 90 and the groove; the gland cylinder 821 of the first fixing device is connected to the gland 824 through a connecting column 823 to leave a gap between the upper pressing plate 822 and the gland 824, and the gap is used to provide an installation working space for the opening device 13. In some other embodiments, a sealing cylinder is provided at the bottom of the sealing seat 811, and the sealing cylinder pushes the sealing seat 811 to move in a direction close to the gland 824 to realize the pressing of the gland 824 and the sealing seat 811 to seal the pressurized chamber 83. For the testing of sample can lids 90 with different diameters, in this embodiment, it is realized by replacing the sealing seat 811 and the gland 824. The sealing seat 811 can be directly taken out by hand, and the gland 824 is tightly attracted by a magnet through a positioning groove, and the replacement of the fixture is very convenient and fast.

[0064] Preferably, the pressure-resistant deformation detection mechanism 40 further includes a pressure sensor and a controller. The pressure sensor is used to sense the air pressure in the pressurized chamber 83 and send the air pressure value to the controller; the controller is used to receive the signal sent by the pressure sensor and issue an instruction to continue pressurizing or stop pressurizing the pressure booster according to the received air pressure value; the pressure booster is adapted to pressurize or stop pressurizing according to the instruction issued by the pressure booster. Among them, the pressure sensor can be arranged in the pressurized chamber 83, in the pressurizing pipeline or on the pressure booster.

[0065] Based on the above structure, the automatic can lid detection equipment can not only perform the tab detection, but also perform the "can lid 90 deformation tracking test", the "can lid 90 pressure resistance test" and the "engraving line qualification test".

[0066] First, the working principle of the automatic can lid detection equipment for performing the tab detection is as follows:

[0067] The lid-taking mechanism 30 is used to pick up the can lid 90 from the area to be inspected and send it to the steering and positioning mechanism 20. After the can lid 90 is steered and positioned by the steering and positioning mechanism 20, the lid-taking mechanism 30 picks up the can lid 90 from the steering and positioning mechanism 20 and sends it to the sealing gasket 812 of the first sealing device 11 at the inspection station of the tab detection mechanism 10. The capping cylinder 821 drives the capping 824 to move in the direction close to the sealing seat 811, so that the capping 824 presses the can lid 90 tightly onto the sealing gasket 812, forming a pressurized chamber 83 between the can lid 90 and the sealing seat 811. A pressurizer (such as an automatic air pump) is used to pressurize the pressurized chamber 83. After pressurizing the pressurized chamber 83, the hook portion 1311 of the opening device 13 is used to hook and pull the pull ring on the front of the can lid 90, and pull the tab on the can lid 90 in the direction away from the can lid 90 body; when the opening device 13 pulls the pull ring, it is monitored whether the pull ring and / or the tab fly off under the action of the pressure in the pressurized chamber 83; in the observation step, if the fly-off occurs, the can lid 90 is classified as a non-conforming product; if the fly-off does not occur, the can lid 90 is classified as a conforming product.

[0068] Second, the working principle of the automatic can lid detection equipment for the deformation tracking test of the can lid 90 is as follows:

[0069] The lid-taking mechanism 30 is used to grab the can lid 90 from the area to be inspected and place it on the sealing gasket 812 of the second sealing device 41. The capping cylinder 821 drives the capping 824 to move in the direction close to the sealing seat 811, so that the capping 824 presses the can lid 90 tightly onto the sealing gasket 812, forming a pressurized chamber 83 between the can lid 90 and the sealing seat 811. The telescopic cylinder in the micrometer 432 drives the micrometer head to extend, so that the micrometer head abuts against the can lid 90. A pressurizer (such as an automatic air pump) is used to pressurize the pressurized chamber 83, and the can lid 90 bulges under the action of the internal pressure. At this time, the micrometer head retracts under the push of the can lid 90, and the micrometer 432 monitors the deformation value of the can lid 90 and feeds it back to the controller for display, facilitating the operator's monitoring. Among them, the micrometer principle of the micrometer 432, or the connection data transmission principle between the micrometer 432 and the controller, is a conventional technical means in the art and will not be elaborated here.

[0070] Specifically, in the actual detection process, the automatic can lid detection equipment can simulate the situation where when the canned product is subjected to thermal sterilization, pressure is generated inside the can, the can lid 90 deforms, and normally after the can cools down, a vacuum is generated and the bottom of the can will return to its original shape. By installing a micrometer 432 in the middle, the deformation of the can lid 90 under different pressure states can be monitored, and the deformation of the can lid 90 during the start of pressurization, pressure relief, and vacuum pumping can be monitored.

[0071] Of course, on the basis of the above structure, the automatic can lid detection equipment can also perform the LengthTest test (pressurization detection with a set deformation amount, and measure the pressure value when the can lid 90 generates the set deformation amount).

[0072] Thirdly, the working principle of the automatic can lid detection device for the 90-pressure resistance test of the can lid is as follows:

[0073] The lid-taking mechanism 30 grabs the can lid 90 from the area to be inspected and places it on the gasket 812 of the second sealing device 41. The lid-pressing cylinder 821 drives the lid-pressing member 824 to move towards the sealing seat 811, so that the lid-pressing member 824 presses the can lid 90 tightly onto the gasket 812, forming a pressurizing chamber 83 between the can lid 90 and the sealing seat 811. A pressurizer (such as an automatic air pump) is used to continuously pressurize the pressurizing chamber 83 until the internal pressure rises to cause the deformation of the can lid 90. Since the space of the pressurizing chamber 83 will suddenly increase when the can lid 90 is deformed, the pressure value in the pressurizing chamber 83 will suddenly decrease. Since the pressure sensor transmits the pressure value in the pressurizing chamber 83 to the controller in real time, the controller analyzes the pressure value. When the pressure value suddenly decreases, it is determined that the pressure value is the maximum pressure resistance value of the can lid 90, and the maximum pressure resistance value is displayed on the controller, and the test terminates. Among them, how the pressure sensor obtains the pressure value, how the pressure sensor transmits data to the controller, and how the controller analyzes the data to determine the sudden change of the pressure value are all conventional technical means for those skilled in the art, which will not be elaborated here.

[0074] Fourthly, the working principle of the automatic can lid detection device for the "engraving line qualification test" is as follows: After fixing the can lid 90, a set pressure is applied to the pressurizing chamber 83. If the engraving line of the can lid 90 is damaged, the engraving line is unqualified; if the engraving line is not damaged, the engraving line is qualified.

[0075] It is worth mentioning that through the cooperation of the tab detection mechanism 10, the pressure-resistant deformation detection mechanism 40, the lid-taking mechanism 30, and the steering and positioning mechanism 20, the automatic can lid detection device can integrate multiple detection functions. At the same time, by using the cooperation of the lid-taking mechanism 30 and other detection mechanisms, the detection efficiency can be greatly improved.

[0076] Regarding the opening device 13, preferably, in order to better simulate the action of manually pulling the pull ring and better open the tab, the pulling part of the opening device 13 for connecting the pull ring to apply a pulling force needs to form a certain angle with the surface of the can lid 90, such as 20 degrees to 70 degrees, so as to facilitate using the opening device 13 to pull open the tab; the can lid tab detection device of this embodiment further includes a frame for fixing the relative positions of various components; the opening device 13 includes a hook arm 131 for hooking the pull ring, a pulling device 132 that is relatively inclined to the surface of the can lid 90 to facilitate providing an oblique pulling force, and an assisting pushing device 133 for assisting the pulling device 132 to pull the pull ring to open the tab.

[0077] Specifically, such as Figure 6 、 7As shown, one end of the hook arm 131 is provided with a hook portion 1311 for hooking the pull ring, and the other end is hinged to the pulling device 132; the pulling device 132 has a pulling portion inclined relative to the can lid 90, and the pulling portion is adapted to pull the hook arm 131 so that the hook arm 131 moves away from the can lid 90 at an angle inclined relative to the can lid 90; the pulling device 132 is hinged to the frame, and the pushing device 133 is used to push the pulling device 132 so that the pulling device 132 rotates around the frame, and then the hook portion 1311 drives the pull ring to move away from the can lid 90 to open the tab on the can lid 90.

[0078] In this embodiment, the sealing device has a horizontally arranged placement area, and the fixing device is used to horizontally fix the can lid 90 to facilitate manual or robotic placement or removal of the can lid 90 to or from the placement area; and the pulling device 132 is inclined at an angle of 20 degrees to 70 degrees, such as 30 degrees or 45 degrees, to open the pull ring at an inclined angle. In addition, the other end of the telescopic cylinder body is hinged to the frame.

[0079] Preferably, the pulling device 132 includes a telescopic cylinder and a connecting member. The telescopic cylinder includes a body and a telescopic rod. The telescopic cylinder body is fixed to the frame. One end of the connecting member is hinged to the hook arm 131, and the other end is fixedly connected to the telescopic rod of the telescopic cylinder. The pushing device 133 is a pushing cylinder. The pushing cylinder body is fixed to the frame, and the telescopic rod of the pushing cylinder is used to push the connecting member along a direction parallel to the surface of the can lid 90. Since the telescopic cylinder is installed behind the hinge axis of the connecting member and the hook arm 131, the telescopic cylinder only exerts a pulling force during the process of pulling the pull ring and does not exert a horizontal or vertical force on the can lid 90.

[0080] Optionally, the hook portion 1311 is configured as a 90-degree bending structure.

[0081] Based on the above structure, the working principle of the opening device 13 in this embodiment is as follows:

[0082] The telescopic cylinder is activated, the telescopic rod retracts, pulling the hook arm 131 to move along the inclined angle, the hook portion 1311 moves in the horizontal direction, the hook portion 1311 inserts into the gap between the pull ring and the can lid 90 body, and at the same time, the hook portion 1311 also rises in the vertical direction to hook the pull ring; by using the telescopic cylinder, the pull ring can be pulled to rotate a certain angle around the rivet on the can lid 90; and since one end of the pull ring is hinged to the can lid 90, the other end is rotatably connected to the hook portion 1311, the other end of the hook arm 131 is hinged to the connecting member, the connecting member is fixedly connected to the telescopic cylinder, and the telescopic cylinder is hinged to the frame. When the pull ring rotates a certain angle, the pushing cylinder works, pushing the connecting member in the horizontal direction, which is equivalent to pushing a rod body (connecting member + telescopic cylinder) in a link system, which can drive the hook arm 131, and then drive the pull ring to rise, so as to realize lifting the pull ring upward by using the pushing cylinder to complete the opening of the tab.

[0083] The advantages of the above-mentioned opening device 13 are as follows: By the operation of the pulling device 132, it can simulate the action of first rotating the pull ring to a certain angle when a human hand holds the pull ring to open the tab; then, by the operation of the pushing device 133, it simulates the action of lifting the pull ring upward after rotating the pull ring, so that the score line at the connection between the tab and the lid 90 body cracks; through the combination of the two, the action of pulling open the pull ring is scientifically reproduced, so as to obtain the test result of the reliability of the tab.

[0084] Regarding the lid-taking mechanism 30, preferably, the lid-taking mechanism 30 includes a column 31, a lid-taking assembly 32, a lifting assembly, and a rotation driving device 34. The lid-taking assembly 32 includes a lid-taking arm 321, a vacuum chuck 3211 provided on the lid-taking arm 321, and a vacuum generator 322 for providing suction to the vacuum chuck 3211; when the vacuum generator 322 is turned on, the vacuum chuck 3211 can suck the lid 90; one end of the lid-taking arm 321 away from the vacuum chuck 3211 is slidably connected to the column 31. The lifting assembly includes a lifting driving device 331 and a supporting block 332 connected to the lifting drive; when the supporting block 332 is driven to rise, it supports the lid-taking arm 321 to rise; when the supporting block 332 descends, the lid-taking arm 321 slides down along the column 31 under the action of its own weight; the rotation axis of the rotation driving device 34 is connected to the column 31 to drive the column 31 to rotate, and then drive the lid-taking arm 321 to rotate to different positions for taking or placing the lid. In this embodiment, the lifting driving device 331 is a lifting cylinder, the rotation driving device 34 is a servo motor, and the vacuum generator 322 is a vacuum pump. In other embodiments, the rotation driving device 34 can be a rotary cylinder.

[0085] Specifically, the working principle of the lid-taking mechanism 30 in this embodiment is as follows:

[0086] The lifting cylinder is not directly connected to the lid-taking arm 321; when the lid needs to be taken, the vacuum generator 322 generates a vacuum, and the four evenly distributed vacuum chucks 3211 contact the lid 90 and suck the lid 90 tightly. The lifting cylinder retracts upward to drive the supporting block 332 to move upward. The supporting block 332 supports the lid-taking arm 321 to move to the upper limit position. The rotary cylinder drives the column 31 to rotate, and then drives the lid-taking arm 321 to rotate above the test station. The lifting cylinder extends downward, and the supporting block 332 disengages from the lid-taking arm 321. The supporting block 332 no longer supports the lid-taking arm 321. Under the action of gravity, the lid-taking arm 321 descends along the linear guide on the column 31. The vacuum chuck 3211 connected to the lid 90 touches the in-place sensor at the measurement station. The in-place sensor sends an in-place message to the controller, and the controller sends a stop suction instruction to the vacuum generator 322. The vacuum generator 322 cuts off the vacuum. The lifting cylinder retracts to drive the lid-taking arm 321 to rise to the upper limit position. The rotary cylinder rotates the lid-taking arm 321 above the lid-taking station.

[0087] Preferably, in order to ensure successful lid removal, a photoelectric switch is installed on the lid removal arm 321. During the process of sucking the lid, if the lid is not sucked, the photoelectric switch has no signal, and the photoelectric switch sends a "lid not sucked signal" to the controller, which controls the lifting cylinder to move for sucking the lid again.

[0088] It is worth mentioning that through the setting of the lid removal mechanism 30, it can automatically adapt to different heights of different workstations. At the same time, when the can lids 90 in the inspection area are stacked, the lid removal mechanism 30 can also automatically adapt to the stacking height of the can lids 90 for lid sucking operation; based on the structure of the lid removal mechanism 30, when storing the to-be-inspected can lids 90 in the inspection area, the can lids 90 can be stacked so that the inspection area can place the most can lids 90 with the smallest area.

[0089] Preferably, in order to facilitate batch inspection of the can lids 90, the automatic can lid inspection equipment of this embodiment further includes at least one can lid placement bin 50. Each can lid placement bin 50 includes at least three positioning rods 51 connected to the frame. A stacking area for the to-be-inspected can lids 90 is formed between the positioning rods 51. The to-be-inspected can lids 90 are stacked in the stacking area for the can lids 90, and the positioning rods 51 are used to limit the can lids 90 in the stacking area for the can lids 90. In this embodiment, each can lid placement bin 50 includes four positioning rods 51, and more than 50 can lids 90 can be stacked. Different diameter sample lids can quickly replace different sample lid placement bins.

[0090] Preferably, the can lid placement bin 50 further includes a lid seat 52 provided on the frame. The positioning rods 51 are arranged on the lid seat 52, and the lid seat 52 is used to support the can lids 90; a photoelectric detection switch is also installed on the lid seat 52 to detect whether there are can lids 90 in the can lid placement bin 50. If it is detected that there are no can lids 90 in this bin, a signal is sent to the controller. After analysis, the controller sends a signal to the lid removal mechanism 30 to move to the next can lid placement bin 50 for lid removal.

[0091] Preferably, several can lid placement bins 50, the steering and positioning mechanism 20, and the tab detection machine are arranged in sequence along the rotation arc direction of the lid removal arm 321, which is convenient for the lid removal arm 321 to pick up and place lids at different positions.

[0092] Preferably, the automatic can lid detection device further includes a lid discharging mechanism 60 for discharging the can lid 90 from the detection station after the detection of the can lid 90 is completed; the lid discharging mechanism 60 includes a flap driving device 61, a turning block 62, a platform plate 63 and a lid pushing assembly; the flap driving device 61 is fixedly arranged on the machine frame, the turning driving device has a rotating shaft, the rotating shaft is connected to the turning block 62, and the bottom of the turning block 62 is connected to the platform plate 63; the groove of the sealing seat 811 is a sealing through groove, the platform plate 63 has an installation through groove, the lid pushing assembly includes a lid pushing cylinder 641 fixedly connected to the platform plate, and further includes a lid pushing block 642 connected to the lid pushing cylinder 641, and the lid pushing block 642 sequentially passes through the installation through groove and the sealing through groove; the flap driving device 61 is used to turn the platform plate 63, and the lid pushing assembly is used to cooperate with the flap driving device 61 to push the can lid 90 out of the sealing device for lid discharging. The flap driving device 61 in this embodiment is a rotary cylinder.

[0093] Specifically, the working principle of the lid discharging mechanism 60 is as follows: the sealing seat 811 for placing the can lid 90 is arranged on the turnable platform plate 63. After the lid detection is completed, after turning a certain angle through the rotary cylinder, the lid pushing cylinder 641 pushes the lid pushing block 642 to extend, and pushes the can lid 90 away from the sealing seat 811 and drops it into the recovery tank, so as to facilitate the recovery of the detected can lid 90.

[0094] It is worth mentioning that the axis of the rotating shaft of the lid discharging mechanism 60 is located at the center line of the turning block 62, and the main body to be turned is the platform plate 63 and the sealing seat 811 which are connected to each other. At this time, the turnable platform plate 63 is located below the rotation axis of the rotary cylinder, generating eccentricity, so that when the capping cylinder 821 pushes the capping 824 to press the sealing seat 811, automatic centering can be realized, and automatic adaptation adjustment for pressing can be carried out, so that the capping 824 can press the can lid 90 vertically on the sealing seat 811.

[0095] Preferably, it further includes a discharging mechanism 70; the discharging mechanism 70 includes an inclined discharging bin 71, an outlet baffle 72 arranged in the discharging bin 71 to divide the discharging bin 71 into two discharging channels, a toggling cylinder 73 arranged outside the discharging bin 71, a swing rod 74 connected to the telescopic rod of the toggling cylinder 73, a swing shaft connected to the swing rod 74, and a toggling plate 75 arranged in the discharging bin 71 and connected to the other end of the swing shaft; the top of the discharging bin 71 is provided with a lid inlet, and the lid inlet is connected to the lid discharging mechanism 60; when the toggling cylinder 73 extends or retracts, it drives the toggling plate 75 to toggle left or right, so that the can lid 90 is discharged to the right or left side of the outlet baffle 72. By controlling the extension or retraction of the cylinder to drive the turning of the baffle, the tested lids can be divided into two channels of qualified and unqualified in the discharging channel, which is convenient for the operator to take samples of the unqualified ones for analysis.

[0096] The above embodiments are only the preferred embodiments of the present invention, and the scope of protection of the present invention cannot be limited thereby. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention fall within the scope of protection required by the present invention.

Claims

1. An automatic can lid detection device, characterized in that: It includes a frame and a tab detection mechanism, a steering and positioning mechanism, a lid picking mechanism, and a lid discharging mechanism provided on the frame; The tab detection mechanism includes a first sealing device for cooperating with the can lid to form a pressurized chamber, a first fixing device for fixing the can lid to the first sealing device, a pressure booster for pressurizing the pressurized chamber, and an opening device for pulling the pull ring on the can lid to open the tab on the can lid; the first sealing device includes a sealing seat with a groove and a sealing gasket provided on the sealing seat; the first fixing device includes a capping cylinder and a capping connected to the capping cylinder; when detection is required, the capping presses the can lid tightly between the capping and the sealing gasket to fix the can lid at the detection station and form the pressurized chamber between the can lid and the groove; The steering and positioning mechanism includes a positioning rod and a positioning seat for placing the can lid; the end of the positioning rod has a positioning block protruding towards the positioning seat; the positioning seat and the positioning rod are configured to be relatively rotatable, and during the relative rotation, the positioning block abuts against the tab on the can lid to hold the can lid in the positioning position, or the positioning block pushes against the tab on the can lid to push the can lid to the positioning position; The lid picking mechanism is used to pick up the can lid from the area to be inspected and send it to the steering and positioning mechanism, and then grab the can lid to the tab detection mechanism along a fixed route; The lid discharging mechanism includes a flip driving device, a flip block, a platform plate, and a lid pushing assembly; the flip driving device is fixedly arranged on the frame, the flip driving device has a rotating shaft, the rotating shaft is connected to the flip block, and the bottom of the flip block is connected to the platform plate; the groove of the sealing seat is a sealing through groove, the platform plate has an installation through groove, the lid pushing assembly includes a lid pushing cylinder fixedly connected to the platform plate, and further includes a lid pushing block connected to the lid pushing cylinder, and the lid pushing block sequentially passes through the installation through groove and the sealing through groove; the flip driving device is used to flip the platform plate, and the lid pushing assembly is used to cooperate with the flip driving device to push the can lid out of the first sealing device for lid discharging; The axis of the rotating shaft of the lid discharging mechanism is located at the center line of the flip block, and the main body to be flipped is the platform plate and the sealing seat connected to each other. At this time, the flipable platform plate is located below the rotating axis of the rotating cylinder, generating eccentricity, so that when the capping cylinder pushes the capping to press the sealing seat tightly, the platform plate and the sealing seat can achieve automatic centering and automatically adapt to adjust the pressing, so that the capping can press the can lid vertically on the sealing seat.

2. The automatic can lid detection device according to claim 1, characterized in that: It further includes a pressure and deformation detection mechanism; the pressure and deformation detection mechanism includes a second sealing device, a second fixing device, a pressure booster, and a deformation measuring device; the second sealing device is used to place the can lid and cooperate with the can lid to form a pressurized chamber, the second fixing device is used to cooperate with the second sealing device to fix the can lid, the pressure booster is used to pressurize the pressurized chamber, and the deformation measuring device is on the side away from the pressurized chamber, so as to measure the deformation of the can lid when pressurizing in the pressurized chamber.

3. The automatic can lid detection device according to claim 2, characterized in that: The deformation measuring device includes a probe mounting seat connected to the second fixing device and a micrometer connected to the probe mounting seat; the micrometer includes a micrometer head and a telescopic member, and the telescopic member is used to drive the micrometer head to move in a direction approaching the can lid so that the micrometer head abuts against the can lid.

4. The automatic can lid detection device according to claim 2 or 3, characterized in that: The second sealing device also includes a sealing seat having a groove and a sealing gasket provided on the sealing seat; the second fixing device also includes a capping cylinder and a capping connected to the capping cylinder; when detection is required, the capping and the sealing gasket press the can lid tightly to fix the can lid at the detection station and form the pressurized chamber between the can lid and the groove; A upper pressing plate and a connecting column are sequentially connected between the capping cylinder and the capping of the first fixing device to leave a gap between the upper pressing plate and the capping, and the gap is used to provide an installation working space for the opening device.

5. The automatic can lid detection device according to any one of claims 1-3, characterized in that: The can lid taking mechanism includes a column, a can lid taking assembly, a lifting assembly and a rotation driving device, the can lid taking assembly includes a can lid taking arm, a vacuum chuck provided on the can lid taking arm, and a vacuum generator for providing suction force to the vacuum chuck; when the vacuum generator is turned on, the vacuum chuck can suck the can lid; One end of the can lid taking arm away from the vacuum chuck is slidably connected to the column, and the lifting assembly includes a lifting driving device and a supporting block connected to the lifting driving; when the supporting block is driven to rise, it supports the can lid taking arm to rise; when the supporting block descends, the can lid taking arm slides down along the column under the action of its own weight; The rotation axis of the rotation driving device is connected to the column to drive the column to rotate, and further drive the can lid taking arm to rotate to different positions for taking or placing the can lid.

6. The automatic can lid detection device according to claim 5, characterized in that: It further includes at least one can lid placement bin, and each can lid placement bin includes at least three positioning rods connected to the frame, and a stacking area for to-be-inspected can lids is formed between the positioning rods.

7. The automatic can lid detection device according to claim 6, characterized in that: The can lid placement bin further includes a lid seat provided on the frame, the positioning rods are arranged on the lid seat, and the lid seat is used to support the can lid; a photoelectric detection switch is also installed on the lid seat for detecting whether a can lid is placed in the can lid placement bin.

8. The automatic can lid detection device according to claim 6, characterized in that: A plurality of the can lid placement bins, the steering positioning mechanism, and the tab detection machine are sequentially arranged along the rotation arc direction of the can lid taking arm.

9. The automatic can lid detection device according to claim 1, characterized in that: It further includes a blanking mechanism; the blanking mechanism includes an inclined blanking bin, an outlet baffle disposed in the blanking bin to divide the blanking bin into two discharge channels, a toggle cylinder disposed outside the blanking bin, a swing rod connected to the telescopic rod of the toggle cylinder, a swing shaft connected to the swing rod, and a toggle plate disposed in the blanking bin and connected to the other end of the swing shaft; The top of the blanking bin is provided with an inlet cover opening, and the inlet cover opening is connected to the cover discharging mechanism; when the toggle cylinder extends or retracts, it drives the toggle plate to toggle left or right, so that the can lids are discharged to the right or left side of the outlet baffle.

Images