A precise counting device and method for pop-off caps

Abstract

The application discloses a precise counting device and method for zip-top lids, comprising a chute, a photoelectric sensor and a gland assembly, the gland assembly comprising a gland block, an optical axis, a spring and a pulse air source assembly; the bottom of the gland block is provided with a directional separation nozzle, when high-pressure gas delivered by the pulse air source assembly is sprayed from the directional separation nozzle, a pushing force towards the photoelectric sensor is applied to the zip-top lid to be counted, the zip-top lid is pushed into the counting area one by one for counting; and the reaction force generated by the gas spraying drives the gland block to move upwards along the optical axis, the spring is compressed, so that the knocking force separates the adjacent zip-top lids. In the technical solution, the directional separation nozzle is matched with the pulse air source to simultaneously realize the functions of "jet-propelled cover" and "reaction force knocking separation", effectively solve the problem of adjacent zip-top lid jamming, ensure that the zip-top lids pass through the counting area one by one, and significantly improve the counting accuracy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of easy-open lid production equipment, in particular to a device and method for realizing accurate counting of easy-open lids one by one in the production process of easy-open lids, which is suitable for the counting link of the automatic production line of various specifications of easy-open lids. BACKGROUND

[0002] Currently, the mainstream counting method on the easy-open lid production line relies on photoelectric sensors cooperating with a sliding chute conveying structure to realize counting. However, the outer edge of the easy-open lid is provided with a groove, and adjacent easy-open lids are easily stacked and clamped through the groove, resulting in multiple lids passing through the photoelectric sensor at the same time, and causing problems of missed counting and incorrect counting. At the same time, the traditional sliding chute only uses a simple limiting structure to ensure the balance of the movement of the easy-open lid, and it is difficult to solve the clamping problem of the lid body, and the counting stability is poor. Manual separation not only has low efficiency, but also increases the labor cost of production, and cannot meet the needs of high-speed production lines. With the expansion of the production scale and the improvement of the automation level of easy-open lids, the existing counting equipment has the problems of incomplete separation of the lid body and insufficient counting accuracy, which are increasingly prominent, and there is an urgent need for a technical solution that can realize stable conveying and accurate counting of easy-open lids to meet the efficient and accurate counting needs of the production line. SUMMARY

[0003] The present application aims to solve the problems of low counting accuracy and unstable conveying caused by the clamping of adjacent easy-open lids in the existing easy-open lid counting equipment, and provides an easy-open lid accurate counting device and method integrating three functions of "jetting to push the lid, counterforce knocking to separate, and elastic pressing to stabilize", so as to realize the passing of easy-open lids one by one through the counting area and significantly improve the counting accuracy and conveying stability.

[0004] To achieve the above-mentioned purpose, the present application provides an easy-open lid accurate counting device, the edge of the easy-open lid is provided with an annular groove, the easy-open lid accurate counting device comprises a rack, a sliding chute, a photoelectric sensor and a pressing lid assembly; the sliding chute is fixed on the rack and is used for bearing and conveying the easy-open lid; the photoelectric sensor is installed above the sliding chute and corresponds to the counting area, and is used for detecting the passing easy-open lid;

[0005] The pressing lid assembly comprises a pressing lid, an optical axis, a spring and a pulse air source assembly; the optical axis is vertically fixed on a mounting bracket, the pressing lid is provided with a through hole matched with the optical axis, and the pressing lid is sleeved on the optical axis through the through hole and can slide up and down along the optical axis; the spring is sleeved outside the optical axis and abuts against the mounting bracket and the top of the pressing lid at both ends, respectively, and is used for providing the pressing lid with downward elastic pressure, so that the bottom of the pressing lid is attached to the top of the easy-open lid, and elastic pressing is realized to stabilize;

[0006] The bottom of the pressure cover block is provided with a directional separation nozzle, the nozzle is inclined downward to the side of the photoelectric sensor, and the nozzle is located in front of the feeding end of the photoelectric sensor; the pulse gas source assembly comprises a high-pressure gas source and a gas path pipeline, one end of the gas path pipeline is connected with the high-pressure gas source, the other end penetrates through the pressure cover block and is communicated with the directional separation nozzle, and is used for conveying pulse high-pressure gas to the nozzle;

[0007] When the high-pressure gas conveyed by the pulse gas source assembly is sprayed from the directional separation nozzle, a pushing force towards the photoelectric sensor is applied to the zip-top to be counted, the zip-top is pushed into the counting area one by one for counting, and the reaction force generated by the gas spraying drives the pressure cover block to move upward along the optical axis, and the spring is compressed; when the pulse gas stops spraying, the reaction force disappears, the spring resets and pushes the pressure cover block to move downward, so that the zip-tops are knocked at a certain frequency, and the adjacent zip-tops are separated.

[0008] Further, the gas path pipeline of the pulse gas source assembly is provided with an electromagnetic valve, the electromagnetic valve is electrically connected with the photoelectric sensor, when the photoelectric sensor detects that the previous zip-top leaves the counting area, the electromagnetic valve controls the pulse gas source to spray gas, and the synchronization linkage of the gas spraying and the zip-top conveying is realized.

[0009] Further, two pressure cover blocks are included, the two pressure cover blocks are symmetrically arranged, the diameter of the directional separation nozzle is 0.8-1.2 mm, the bottom of each pressure cover block is provided with at least one directional separation nozzle, the directional separation nozzles correspond to the two sides of the center of the zip-top, and the distance between the center of the nozzle and the detection area of the photoelectric sensor is 5-8 mm, so that the gas pushing force can accurately act on the zip-top to be counted.

[0010] Further, the stiffness coefficient of the spring is 5-8 N / mm, and the pressure of the pressure cover block on the zip-top is 10-15 N in a natural state, so that the zip-top conveying is stable, and the zip-top movement is prevented from being hindered by excessive pressure.

[0011] Further, the feeding guide wheel mechanism and the discharging guide wheel mechanism are further included.

[0012] The feeding guide wheel mechanism comprises two first guide wheels and a first driving motor, the two first guide wheels are symmetrically mounted on the two sides of the chute, the wheel surface is in contact with the side surface of the zip-top, the first driving motor is in transmission connection with the first guide wheel, and the first driving motor is used for driving the first guide wheel to rotate, so that the zip-top is conveyed to the direction of the pressure cover assembly.

[0013] The discharging guide wheel mechanism comprises two second guide wheels and a second driving motor, the two second guide wheels are symmetrically mounted on the two sides of the chute and located behind the discharging end of the pressure cover assembly, the wheel surface is in contact with the side surface of the zip-top, the second driving motor is in transmission connection with the second guide wheel, and the second driving motor is used for driving the second guide wheel to rotate, so that the counted zip-top is conveyed out of the counting area.

[0014] Further, the wheel body material of the first guide wheel and the second guide wheel is polyurethane, the hardness is 60-70A, a ring-shaped groove is arranged in the middle of the wheel body, the width of the ring-shaped groove is 0.4mm, the depth is 0.5mm, the ring-shaped groove is attached to the side surface of the pull-ring cap, the friction is increased, and the pull-ring cap is prevented from being scratched.

[0015] To solve the above technical problems, the application also provides another technical scheme:

[0016] A pull-ring cap accurate counting method is realized based on any one of the above pull-ring cap accurate counting devices, and comprises the following steps:

[0017] The elastic gland: the gland block is attached to the top of the pull-ring cap at the bottom under the elastic pressure of the spring, and the pull-ring cap is elastically pressed;

[0018] The jetting pushes the cap and separates from the knocking: when the pull-ring cap is conveyed to below the directional separation nozzle, the pulse air source assembly conveys the pulse high-pressure gas to the nozzle, the gas is sprayed from the nozzle, and the pull-ring cap to be counted is moved to the direction of the photoelectric sensor; at the same time, the reaction force of the gas jet drives the gland block to slide upward, and the spring is compressed; after the pulse gas stops, the spring resets and drives the gland block to move downward, so that the pull-ring cap is knocked at a certain frequency, and the adjacent pull-ring caps are separated;

[0019] Accurate counting: the single pull-ring cap pushed by the photoelectric sensor passes through the counting area of the photoelectric sensor, the photoelectric sensor detects the pull-ring cap and completes the counting;

[0020] Cyclic execution: the above steps are repeated to realize the continuous and accurate counting of the pull-ring caps one by one.

[0021] Further, the pressure of the pulse high-pressure gas is 0.4-0.8MPa, the pulse frequency is 10-20Hz, and the pulse duration is 0.1-0.3s, so that the gas thrust can not only push the pull-ring cap to move, but also overcome the elastic downward pressure of the spring for a short time, and the gland block is reversely pushed to move away from the pull-ring cap.

[0022] Further, after the photoelectric sensor detects the pull-ring cap, a counting signal is sent to the control system, the control system records the counting data in real time, and when the counting data is abnormal, an alarm prompt is sent, so that the staff can timely troubleshoot the fault.

[0023] Distinguishing from the prior art, the technical scheme comprises a chute, a photoelectric sensor and a gland assembly, the gland assembly comprises a gland block, an optical axis, a spring and a pulse gas source assembly; a directional separation jet hole is formed at the bottom of the gland block, when high-pressure gas delivered by the pulse gas source assembly is sprayed from the directional separation jet hole, a pushing force towards the photoelectric sensor is applied to the pull-tab cap to be counted, the pull-tab cap is pushed into the counting area one by one for counting; and the reaction force generated by the gas spraying drives the gland block to move upwards along the optical axis, and the spring is compressed; when the pulse gas stops spraying, the reaction force disappears, the spring resets to push the gland block to move downwards, knocking force is generated on the pull-tab cap, and the adjacent pull-tab caps are separated. In the technical scheme, the directional separation jet hole and the pulse gas source are matched to simultaneously realize the functions of "jetting to push the cap" and "reaction force knocking to separate", effectively solve the problem of the adjacent pull-tab caps being stuck, ensure that the pull-tab caps pass through the counting area one by one, and significantly improve the counting accuracy; and the spring and the optical axis structure of the gland assembly realize stable elastic gland, avoid the deviation of the pull-tab cap in the conveying process, and further ensure the counting accuracy.

[0024] The above invention content is only a summary of the technical scheme of the present application. In order to enable those skilled in the art to more clearly understand the technical scheme of the present application, and then can be implemented according to the content of the description and the drawings, and in order to let the above-mentioned purpose and other purposes, characteristics and advantages of the present application can be more easily understood, the following is described in combination with the specific embodiments of the present application and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0025] The drawings are only used to show the principles, implementation manners, applications, characteristics and effects of the specific embodiments and other related contents of the present application, and cannot be considered as a limitation of the present application.

[0026] In the drawings of the specification:

[0027] Figure 1 The structure schematic view of the pull-tab cap accurate counting device described in the specific embodiment;

[0028] Figure 2 The side view of the pull-tab cap accurate counting device described in the specific embodiment;

[0029] Figure 3 The front view schematic view of the pull-tab cap accurate counting device described in the specific embodiment;

[0030] Figure 4 The sectional view of the pull-tab cap accurate counting device described in the specific embodiment;

[0031] Figure 5 The sectional view of the pull-tab cap accurate counting device described in the specific embodiment; Figure 4 The local enlarged view of part A in the figure;

[0032] Figure 6The flow chart of the method for accurately counting the pull-tab caps is described in the detailed description;

[0033] The reference signs involved in the above-mentioned figures are explained as follows:

[0034] 1, rack; 2, sliding groove; 3, control cabinet; 4, counting component; 5, pull-tab cap; 41, photoelectric sensor; 42, mounting bracket; 43, second guide wheel; 44, first guide wheel; 45, pressing block;

[0035] 410, counting area; 411, transmitter; 412, receiver;

[0036] 421, height adjusting groove; 451, spring; 452, optical axis; 453, directional separation jet hole; DETAILED DESCRIPTION

[0037] In order to describe possible application scenarios, technical principles, specific schemes that can be implemented, purposes and effects that can be achieved, etc. of the present application, the following will be described in detail in combination with specific embodiments listed below and with the aid of the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical schemes of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0038] In this document, the term “embodiment” means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present application. The term “embodiment” appearing at various positions in the specification does not necessarily refer to the same embodiment, and does not particularly limit the independence or association between other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form a corresponding implementable technical scheme.

[0039] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the art to which the present application belongs; the use of related terms herein is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0040] In the description of the present application, the phrase “and / or” is a description of the logical relationship between the objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases: A exists, B exists, and A and B exist at the same time. In addition, the character “ / ” herein generally represents that the associated objects before and after are a “or” logical relationship.

[0041] In the present application, the phrases such as “first” and “second” are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary and secondary or order relationship between the entities or operations.

[0042] In the present application, the word "comprise", "contain", "have" or other similar forms of these words are used in the sense of "including" but not limited to, without excluding other elements or steps. In the present application, the word "comprise", "contain", "have" or other similar forms of these words are used in the sense of "including" but not limited to, without excluding other elements or steps. In the present application, the word "comprise", "contain", "have" or other similar forms of these words are used in the sense of "including" but not limited to, without excluding other elements or steps.

[0043] In the present application, the word "comprise", "contain", "have" or other similar forms of these words are used in the sense of "including" but not limited to, without excluding other elements or steps. In the present application, the word "comprise", "contain", "have" or other similar forms of these words are used in the sense of "including" but not limited to, without excluding other elements or steps. In the present application, the word "comprise", "contain", "have" or other similar forms of these words are used in the sense of "including" but not limited to, without excluding other elements or steps.

[0044] In the present application, the word "comprise", "contain", "have" or other similar forms of these words are used in the sense of "including" but not limited to, without excluding other elements or steps. In the present application, the word "comprise", "contain", "have" or other similar forms of these words are used in the sense of "including" but not limited to, without excluding other elements or steps. In the present application, the word "comprise", "contain", "have" or other similar forms of these words are used in the sense of "including" but not limited to, without excluding other elements or steps.

[0045] Unless otherwise expressly specified or limited, the terms "mount", "connect", "connect", "fix", "set", and the like used in the description of the embodiments of the present application should be interpreted in a broad sense. For example, the "connection" can be fixed connection, or detachable connection, or integral setting; it can be mechanical connection, or electrical connection, or communication connection; it can be direct connection, or indirect connection through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0046] Please refer to Figures 1 to 5This embodiment provides a precise counting device for easy-open lids, used to accurately count the number of easy-open lids 5 produced. This precise counting device for easy-open lids incorporates three main functional designs: air-push lid pushing, reaction force knocking separation, and elastic pressure stabilization. Therefore, it can effectively separate the easily-open lids 5 that are locked together, and count them one by one through the counting area 410, improving the counting accuracy of the easy-open lids 5.

[0047] like Figure 1 As shown, in this embodiment, the easy-open lid precise counting device includes a frame 1, a slide 2, a photoelectric sensor 41, a lid pressing assembly, a feeding guide wheel mechanism, and a discharging guide wheel mechanism. A control cabinet 3 is located on the side of the frame 1, containing a control circuit and a counting circuit connected to the photoelectric sensor. The frame 1 and slide 2 are existing technologies, only used for basic support and not detailed. The slide 2 is horizontally positioned and fixed to the frame 1, used to transport easy-open lids for counting. The photoelectric sensor 41 and the lid pressing assembly form a counting component 4. The photoelectric sensor 41 is installed in the counting area 410 above the slide 2 to detect easy-open lids; the photoelectric sensor 41 is mounted on a mounting bracket 42, which spans the slide 2 and is fixed to the frame 1, thus positioning the photoelectric sensor 41 above the slide 2. In this embodiment, the core improved component is the lid pressing assembly, which, in conjunction with the feeding / discharging guide wheel mechanism, achieves precise counting. Figure 3 As shown, to accommodate easy-open lids of different sizes, the mounting bracket 42 is provided with a height adjustment groove 421. The photoelectric sensor 41 is mounted on both sides within the height adjustment groove 421 using fasteners. The height adjustment groove 421 is vertically oriented and has oblong holes, thus allowing adjustment of the mounting height of the photoelectric sensor 41. Figure 5 As shown, the bottom of the photoelectric sensor 41 is provided with a transmitter 411 and a receiver 412. The transmitter 411 is used to emit infrared light. When an easy-open cover passes under the photoelectric sensor 41, the infrared light is reflected and thus received by the receiver 412. Therefore, counting is achieved based on the number of pulses received by the receiver 412.

[0048] Combination Figure 1 , Figure 2 and Figure 3As shown, the cover assembly includes a cover block 45, an optical shaft 452, a spring 451 and a pulse gas source assembly. The optical shaft 452 is vertically fixed on the mounting bracket 42, and the optical shaft 452 can be provided with two or more, in this embodiment, two cover blocks 45 are provided, each cover block 45 is provided with two optical shafts 452, and the two optical shafts 452 are located in front of the feed end and behind the discharge end of the photoelectric sensor 41 respectively. The side of the cover block 45 facing the pull-tab (i.e. the bottom of the cover block 45) is provided with a circular arc matching the shape of the pull-tab. The cover block 45 is provided with a through hole matching the optical shaft 452, which is sleeved on the optical shaft 452 and can slide up and down; the spring 451 is sleeved on the outside of the optical shaft 452, and the two ends are respectively abutted against the mounting bracket 42 and the top of the cover block 45. Figure 4 and Figure 5 As shown, the bottom of the cover block 45 is provided with a directional separation nozzle 453 (inclined downward to the photoelectric sensor 41), and the nozzle is connected to the pulse gas source assembly through a gas pipeline. When the high-pressure gas delivered by the pulse gas source assembly is sprayed from the directional separation nozzle 453, a pushing force towards the photoelectric sensor 41 is applied to the pull-tab to be counted, which pushes the pull-tab into the counting area 410 one by one for counting; and the reaction force generated by the gas injection drives the cover block 45 to move upward along the optical shaft 452, and the spring 451 is compressed; when the pulse gas stops spraying, the reaction force disappears, and the spring 451 resets to push the cover block 45 to move downward, thereby knocking the pull-tab at a certain frequency to separate the adjacent pull-tabs.

[0049] When the pull-tab precise counting device counts the pull-tab, the spring 451 provides an elastic downward pressure to the cover block 45, so that the bottom of the cover block 45 is attached to the top of the pull-tab, and the pull-tab is stably pressed in the chute 2 to avoid deviation during transportation. And the pulse gas source delivers high-pressure gas to the nozzle, and the gas is sprayed from the nozzle to apply a pushing force towards the photoelectric sensor 41 to the pull-tab to be counted, which pushes the pull-tab to enter the counting area 410 one by one, thereby improving the counting accuracy. Figure 4 and Figure 5As shown, the one-by-one separation type entering counting area 410 means that only one pop-up cap enters the counting area 410 at a time, and the pop-up cap is separated from the adjacent pop-up cap and is not attached together, thereby avoiding the interference of adjacent pop-up caps on counting and improving the counting accuracy. In this embodiment, the snap-fit pop-up cap can be separated in advance by repeatedly knocking the pop-up cap below by the pressing block 45 before the pop-up cap enters the counting area 410. Specifically, the reaction force generated by the gas injection of the directional separation nozzle 453 drives the pressing block 45 to move upward along the optical axis 452, and at this time, the spring 451 is compressed; after the pulse gas stops, the reaction force disappears, and the spring 451 resets to push the pressing block 45 to knock the pop-up cap downward. Therefore, the repeated knocking process can make the pressing block 45 knock the pop-up cap at the frequency of the pulse gas, thereby breaking the snap-fit state of the adjacent pop-up caps due to the edge groove and separating the cap body.

[0050] As shown in Figure 1 and Figure 2 The feeding guide wheel mechanism in the pop-up cap precise counting device includes two first guide wheels 44 symmetrically installed on both sides of the chute 2 (in front of the feeding end of the pressing assembly), the wheel surface is in contact with the side surface of the pop-up cap, and the first guide wheel 44 is connected to the first driving motor; the first driving motor drives the guide wheel to rotate, the pop-up cap is transported to the pressing assembly through friction, and the orderly entry of the cap body into the counting area 410 is ensured. Similarly to the feeding guide wheel mechanism, the discharging guide wheel mechanism includes two second guide wheels 43 symmetrically installed on both sides of the chute 2 (behind the discharging end of the pressing assembly), which are connected to the second driving motor; the motor drives the guide wheel to rotate, the counted pop-up cap is transported out of the counting area 410, and accumulation is avoided.

[0051] In this embodiment, the pop-up cap is driven to move to the pressing assembly by the first guide wheel 44 mechanism, and the pressing block 45 is attached to the top of the pop-up cap under the action of the spring 451 to stabilize the cap body; in the process of moving the pop-up cap, the pulse gas source pushes the pop-up cap to move to the photoelectric sensor 41, and at the same time, the reaction force drives the pressing block 45 to move upward, the spring 451 resets to knock and separate the adjacent snap-fit cap body; then each pop-up cap passes through the photoelectric sensor 41 one by one to complete counting; after counting, the second guide wheel 43 mechanism transports the counted pop-up cap out of the device, and the cycle is executed.

[0052] In this embodiment, the "jetting to push the cap + knocking to separate" linkage ensures that the pop-up cap passes through the counting area 410 one by one, avoids missed counting and miscounting caused by synchronous counting of multiple caps, and significantly improves the counting accuracy; and the elastic pressing cap cooperates with the guide wheel mechanism to limit the displacement of the pop-up cap, avoid deviation or lateral turning during transportation, and adapt to high-speed production lines. In this embodiment, the pressing block 45 simultaneously realizes the functions of pressing and separating the cap (i.e., knocking to separate the snap-fit pop-up cap), without the need for additional separation driving components, the pushing of the cap and the knocking are simultaneously realized by the pulse gas source, the complexity and cost of the equipment are reduced.

[0053] In the embodiment, an electromagnetic valve is arranged on the gas path pipeline of the pulse gas source assembly, and the electromagnetic valve is electrically connected with the photoelectric sensor 41. When the photoelectric sensor 41 detects that the previous pop-up cap leaves the counting area 410, the electromagnetic valve controls the pulse gas source to spray gas, so as to realize the synchronous linkage of the gas spraying and the pop-up cap conveying. In the embodiment, the linkage of the electromagnetic valve and the photoelectric sensor 41 can be realized: when the photoelectric sensor 41 detects that the previous pop-up cap leaves the counting area 410, the electromagnetic valve is triggered to spray gas, so as to realize the synchronous control of “cap to spray”, and avoid the waste or delay of the gas.

[0054] In the above embodiment, two pressing blocks 45 are arranged, and the two pressing blocks 45 are symmetrically arranged. The diameter of the directional separation nozzle 453 is 0.8-1.2 mm. The bottom of each pressing block 45 is provided with at least one directional separation nozzle 453 corresponding to the two sides of the center of the pop-up cap. The distance between the center of the nozzle and the detection area of the photoelectric sensor 41 is 5-8 mm, so as to ensure that the gas thrust accurately acts on the pop-up cap to be counted. The stiffness coefficient of the spring 451 is 5-8 N / mm. In the natural state, the pressure of the pressing block 45 on the pop-up cap is 10-15 N, so as to ensure the stable conveying of the pop-up cap and avoid the hindering of the movement of the pop-up cap.

[0055] The stiffness coefficient of the spring 451 is 5-8 N / mm, so as to ensure that the pressing pressure is 10-15 N, which can stabilize the cap body and does not hinder the movement of the cap body.

[0056] The diameter of the nozzle is 0.8-1.2 mm, and the two nozzles are symmetrically distributed. The distance between the nozzles and the photoelectric sensor 41 is 5-8 mm, so as to ensure that the gas thrust accurately acts on the two sides of the center of the cap body and avoids the deviation of the thrust. The pressure of the pulse gas is 0.4-0.8 MPa, and the duration is 0.1-0.3 s, so as to push the cap body to move and avoid the overturning of the cap body due to the excessive thrust. The frequency of 10-20 Hz is suitable for the production line speed, so as to realize the synchronization of “one cap and one spray”. In the embodiment, the parameters are optimized, so that the pressing, spraying and knocking functions are matched, and the separation accuracy and the conveying stability are further improved, which is suitable for different specifications of pop-up caps (diameter 50-60 mm).

[0057] The wheel body of the first guide wheel 44 and the second guide wheel 43 is made of polyurethane, and the hardness is 60-70A. A ring groove is arranged in the middle of the wheel body. The width of the ring groove is 0.4 mm, and the depth is 0.5 mm. The ring groove is in contact with the side surface of the pop-up cap, so as to increase the friction and avoid scratching the pop-up cap.

[0058] The hardness of the guide wheel is polyurethane 60-70A, which has wear resistance and elasticity. The annular groove on the wheel surface is in contact with the side of the easy-open cap, which increases the friction and avoids scratching the cap. The second motor has a speed that is 10%-15% higher than that of the first motor, forming a "stable feeding and fast discharging" tension difference, which avoids the accumulation of the counted caps; the adjustable range is 50-100 rpm. In this embodiment, the material, structure and speed of the guide wheel mechanism are optimized to solve the problems of traditional guide wheels, such as slipping, scratching the cap and accumulation, and to improve the conveying efficiency and the integrity of the cap.

[0059] As Figure 6 In another embodiment, an accurate counting method for easy-open caps is provided, which is based on the accurate counting device for easy-open caps described in any of the above embodiments. The accurate counting method for easy-open caps comprises the following steps:

[0060] S501, cap feeding: the first guide wheel 44 mechanism drives the easy-open cap to move towards the cap pressing assembly;

[0061] S502, elastic cap pressing: the cap pressing block 45 is in contact with the top of the easy-open cap at the bottom under the elastic pressure of the spring 451, and the easy-open cap is elastically pressed;

[0062] S503, jetting to push the cap and knocking to separate: when the easy-open cap is conveyed to the position below the directional separation jet hole 453, the pulse gas source assembly delivers pulse high-pressure gas to the jet hole, the gas is sprayed from the jet hole, and the gas pushes the easy-open cap to be counted to move towards the photoelectric sensor 41; at the same time, the reaction force of the gas jet drives the cap pressing block 45 to slide upwards, and the spring 451 is compressed; after the pulse gas stops, the spring 451 resets and pushes the cap pressing block 45 to move downwards, so as to knock the easy-open cap at a certain frequency, and separate the adjacent engaged easy-open caps;

[0063] S504, accurate counting: the single easy-open cap pushed by the photoelectric sensor 41 passes through the counting area 410 of the photoelectric sensor 41 (one by one), and the photoelectric sensor 41 detects the easy-open cap and completes the counting;

[0064] S505, cap discharging: the second guide wheel 43 mechanism conveys the counted easy-open cap out of the device. The above steps S501-S505 are repeatedly executed to realize continuous and accurate counting.

[0065] In step S503, the pressure of the pulse high-pressure gas is 0.4-0.8 MPa, the pulse frequency is 10-20 Hz, and the pulse duration is 0.1-0.3 s, which ensures that the gas thrust can not only push the easy-open cap to move, but also overcome the elastic downward pressure of the spring 451 for a short time to push the cap pressing block 45 to move away from the easy-open cap.

[0066] The pull-ring accurate counting method further comprises: after the photoelectric sensor 41 detects the pull-ring, sending a counting signal to the control system, the control system recording counting data in real time, and when the counting data is abnormal, sending an alarm prompt, so as to facilitate the staff to timely troubleshoot the fault.

[0067] In this embodiment, abnormal alarm can be realized, the control system monitors the counting signal in real time, when “no counting for 2s continuously” (possible accumulation or interruption of conveying) or “2 times of counting in 1s” (possible clamping cover body passing) occurs, sound and light alarm is triggered, so as to facilitate the staff to quickly troubleshoot the fault and reduce the downtime of the production line.

[0068] Comprehensive effect: through intelligent linkage and alarm, the automation degree and reliability of the device are improved, and the cost of manual monitoring is reduced.

[0069] In the application of the aluminum pull-ring production line (diameter 52mm, 56mm, 60mm), based on the structure and parameters in the above embodiments, accurate counting with an error rate lower than 0.1% can be realized without manual intervention separation, which is suitable for high-speed production requirements.

[0070] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of the present application, the patent protection scope of the present application should not be limited. Any equivalent structure or equivalent flow replacement or modification based on the essential concept of the present application, using the content described in the specification and drawings, directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, etc., are all included in the patent protection scope of the present application.

Claims

1. A precise counting device for a pop-up lid, the edge of the pop-up lid being provided with an annular groove, characterized in that, The precise counting device of the pull-ring cap comprises a rack, a chute, a photoelectric sensor and a pressing cap assembly; the chute is fixed on the rack and used for bearing and conveying the pull-ring cap; a mounting bracket is horizontally arranged on the chute and fixed on the rack; the photoelectric sensor is arranged on the mounting bracket and corresponds to a counting area and is used for detecting the passing pull-ring cap; The pressing cap assembly comprises a pressing cap, an optical shaft, a spring and a pulse air source assembly; the optical shaft is vertically fixed on the mounting bracket; the pressing cap is provided with a through hole matched with the optical shaft; the pressing cap is sleeved on the optical shaft through the through hole and can slide up and down along the optical shaft; the spring is sleeved on the outer side of the optical shaft and abuts against the mounting bracket and the top of the pressing cap at two ends respectively and is used for providing the pressing cap with an elastic pressure downward so that the bottom of the pressing cap is attached to the top of the pull-ring cap and the elastic pressing cap is stable; The bottom of the pressing cap is provided with a directional separation jet hole which is inclined downward and faces the side of the photoelectric sensor and is located in front of the feeding end of the photoelectric sensor; the pulse air source assembly comprises a high-pressure air source and an air path pipeline; one end of the air path pipeline is connected with the high-pressure air source and the other end penetrates through the pressing cap and communicates with the directional separation jet hole and is used for conveying the pulse high-pressure gas to the jet hole; the pressure of the pulse high-pressure gas is 0.4-0.8 MPa; When the pulse high-pressure gas jetted from the directional separation jet hole, a pushing force towards the photoelectric sensor is applied to the pull-ring cap to be counted to push the pull-ring cap into the counting area one by one for counting; and the reaction force generated by the gas jet drives the pressing cap to move upward along the optical shaft and the spring is compressed; when the pulse high-pressure gas stops jetting, the reaction force disappears and the spring resets to push the pressing cap to move downward, thereby knocking the pull-ring cap at a certain frequency to separate the adjacent pull-ring caps.

2. The precise counting device for a popper cap according to claim 1, wherein An electromagnetic valve is arranged on the air path pipeline of the pulse air source assembly; the electromagnetic valve is electrically connected with the photoelectric sensor; when the photoelectric sensor detects that the previous pull-ring cap leaves the counting area, the electromagnetic valve controls the pulse air source to jet the gas, thereby realizing the synchronous linkage of the gas jetting and the pull-ring cap conveying.

3. The popper accurate counting device of claim 1, wherein, Two pressing caps are arranged symmetrically; the diameter of the directional separation jet hole is 0.8-1.2 mm; at least one directional separation jet hole is arranged at the bottom of each pressing cap and corresponds to the two sides of the center of the pull-ring cap; the distance between the center of the jet hole and the detection area of the photoelectric sensor is 5-8 mm, thereby ensuring that the gas pushing force is accurately applied to the pull-ring cap to be counted.

4. The precise counting device for a popper cap according to claim 1, wherein The stiffness coefficient of the spring is 5-8 N / mm; in the natural state, the pressure of the pressing cap to the pull-ring cap is 10-15 N, thereby ensuring the stable conveying of the pull-ring cap and avoiding the excessive pressure to hinder the movement of the pull-ring cap.

5. The popper precision counting device of claim 1, wherein, The device further comprises an inlet guide wheel mechanism and an outlet guide wheel mechanism; The inlet guide wheel mechanism comprises two first guide wheels and a first driving motor; the two first guide wheels are symmetrically arranged on the two sides of the chute and the wheel surface is in contact with the side surface of the pull-ring cap; the first driving motor is in transmission connection with the first guide wheel and is used for driving the first guide wheel to rotate and conveying the pull-ring cap to the direction of the pressing cap assembly; The discharge guide wheel mechanism comprises two second guide wheels and a second driving motor, the two second guide wheels are symmetrically installed on both sides of the chute and located behind the discharge end of the gland assembly, the wheel surface is in contact with the side surface of the easy-open cap, the second driving motor is in transmission connection with the second guide wheel for driving the second guide wheel to rotate and conveying the counted easy-open cap out of the counting area.

6. The precise counting device for a popper cap according to claim 5, wherein The wheel body of the first guide wheel and the second guide wheel is made of polyurethane with a hardness of 60-70A, a ring-shaped groove is formed in the middle of the wheel body, the width of the ring-shaped groove is 0.4mm and the depth is 0.5mm, the ring-shaped groove is in close contact with the side surface of the easy-open cap, thereby increasing the friction and avoiding scratching the easy-open cap.

7. A method for accurate counting of a pop-up lid, implemented based on the pop-up lid accurate counting device according to any one of claims 1 to 6, characterized in that, The method comprises the following steps: Elastic gland: the bottom of the gland block is in close contact with the top of the easy-open cap under the elastic pressure of the spring, thereby forming elastic compression on the easy-open cap; Jetting and knocking separation: when the easy-open cap is conveyed to below the directional separation jetting hole, the pulse air source assembly conveys pulse high-pressure gas to the jetting hole, the gas is jetted from the jetting hole to push the easy-open cap to be counted to move in the direction of the photoelectric sensor; meanwhile, the reaction force of the gas jetting drives the gland block to slide upward and the spring is compressed; after the pulse high-pressure gas stops, the spring resets to push the gland block to move downward, thereby knocking the easy-open cap at a certain frequency to separate the adjacent engaged easy-open caps; Precise counting: the single easy-open cap pushed by moves through the counting area of the photoelectric sensor, the photoelectric sensor detects the easy-open cap and completes counting; Cyclic execution: the above steps are repeated to realize continuous and one-by-one precise counting of the easy-open caps.

8. The method of claim 7, wherein, The pulse frequency is 10-20Hz and the pulse duration is 0.1-0.3s, which ensures that the gas thrust can not only push the easy-open cap to move, but also overcome the elastic downward pressure of the spring for a short time to push the gland block to move in the direction away from the easy-open cap.

9. The method of claim 7, wherein, After the photoelectric sensor detects the easy-open cap, the counting signal is sent to the control system, the control system records the counting data in real time, and when the counting data is abnormal, an alarm prompt is sent to facilitate the staff to timely troubleshoot the fault.

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