Safety guard for cigarette making machine
By adopting a normally open contact design and a dual detection mechanism on the ZJ17 cigarette machine, the problem of easy deformation of the interlocking switch has been solved, improving the safety of equipment operation and maintenance efficiency, ensuring the safety of operators, and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA TOBACCO SICHUAN IND CO LTD
- Filing Date
- 2025-06-17
- Publication Date
- 2026-06-19
Smart Images
Figure CN224369057U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of tobacco technology, and in particular to safety protection devices for cigarette rolling machines. Background Technology
[0002] In the cigarette production process of the tobacco industry, cigarette rolling machines play a crucial role. As a widely used high-speed cigarette production equipment, the safety and stability of the ZJ17 cigarette rolling machine directly affect production efficiency and the personal safety of operators.
[0003] The ZJ17 cigarette making machine is equipped with a front protective cover, and the interlocking switch of the front protective cover, as a key component to ensure the safe operation of the equipment, plays an important role in monitoring the closing status of the protective cover in real time. Its core function is to ensure that the equipment can only be started and operated when the protective cover is fully closed, thereby effectively preventing operators from coming into contact with the operating mechanical parts inside the equipment due to misoperation or other reasons, and avoiding mechanical injuries and various safety accidents caused by such actions.
[0004] In related technologies, the arc-shaped rail contact surface of the interlock switch on the front protective cover of cigarette machines is relatively narrow. During long-term operation or when subjected to external forces, it is prone to deformation. This deformation further affects the normal operation of the interlock switch, rendering its safety interlock function ineffective and posing a significant safety hazard. Utility Model Content
[0005] Therefore, it is necessary to provide a safety protection device for cigarette machines to address the safety hazards posed by the existing interlocking switches of the front protective cover.
[0006] A safety protection device for a cigarette rolling machine, the safety protection device for a cigarette rolling machine comprising:
[0007] A protective body having a receiving cavity and an opening communicating with the receiving cavity;
[0008] An interlocking switch is connected to the cavity wall of the receiving cavity; the interlocking switch is provided with at least one pair of normally open contacts;
[0009] A protective cover is rotatably connected to the protective body; when the protective cover is in the closed state, the protective cover fits against the protective body to seal the opening.
[0010] When the protective cover is in the open state, the normally open contact is in the open state, and the normally open contact extends out of the end face of the protective body facing the protective cover through the opening; when the protective cover is in the closed state, the protective cover presses against the normally open contact so that the normally open contact is in the closed state.
[0011] In one embodiment, the interlocking switch is further provided with a spring element connected to the side of the normally open contact away from the protective cover;
[0012] When the protective cover is in the open state, the elastic element drives the normally open contact to extend;
[0013] When the protective cover is in the closed state, the elastic element is in a compressed state.
[0014] In one embodiment, the cigarette machine safety protection device further includes an adjusting member and a fixed base; one end of the elastic member is connected to the fixed base, and the other end is connected to the normally open contact through the adjusting member;
[0015] By rotating the adjusting member, the force applied by the elastic member to the normally open contact can be adjusted.
[0016] In one embodiment, the cavity wall of the receiving cavity is configured with a mounting groove, and the interlocking switch is disposed in the mounting groove.
[0017] In one embodiment, the cigarette machine safety protection device further includes a first detection element, which is disposed on the side of the protective body facing the protective cover; the first detection element is used to detect whether the protective cover is in contact with the protective body.
[0018] In one embodiment, the first detection element is a reflective photoelectric sensor with a detection distance of 50mm-100mm and a response time of less than 1ms.
[0019] In one embodiment, the cigarette machine safety protection device further includes a second detection element, which is disposed on the side of the protective cover facing the protective body; the second detection element is used to detect whether the protective cover is in the closed state.
[0020] In one embodiment, the second detection element is a reflective photoelectric sensor with a detection distance of 50mm-100mm and a response time of less than 1ms.
[0021] In one embodiment, the cigarette machine safety protection device further includes an elastic buffer element disposed on the contact surface of one of the protective cover and the protective body for contact with the other.
[0022] In one embodiment, the cigarette machine safety protection device further includes a positioning groove and a positioning element for insertion into the positioning groove;
[0023] One of the positioning element and the positioning groove is disposed on the protective cover, and the other is disposed on the protective body.
[0024] The aforementioned safety protection device for cigarette machines uses normally open contacts in its interlock switch. These contacts detect the closed state of the protective cover. Therefore, the circuit is only connected when the protective cover is closed, enabling the cigarette machine to start. This more reliably prevents accidental start-up when the protective cover is not properly closed, maximizing operator safety and preventing potential hazards from contact with internal moving parts. Furthermore, normally open contacts are open under normal conditions, reducing the probability of false triggering compared to normally closed contacts. Focusing on detecting the closed state of the protective cover makes the detection logic clearer and more intuitive; the machine can only start when the protective cover is fully closed, reducing abnormal operation caused by interlock switch malfunctions and improving the overall reliability of the equipment in terms of safety protection. When equipment malfunctions due to problems related to the protective cover, such as failure to start normally, the normally open contact logic that detects the closure of the protective cover makes it easier to locate the fault by checking whether the contacts are closed normally and whether the relevant circuits are conductive. Maintenance personnel can more quickly determine whether the problem is with the mechanical installation of the protective cover itself or with the electrical circuits, switch contacts, etc., thus enabling more efficient maintenance, reducing equipment downtime, and indirectly improving production efficiency. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the embodiments or exemplary embodiments of this application, the drawings used in the description of the embodiments or exemplary embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0026] Figure 1 This is a schematic diagram of the protective cover in the cigarette machine safety protection device provided in an embodiment of this application in the closed state.
[0027] Figure 2 for Figure 1 The diagram shows the protective cover of the cigarette machine safety device in the open state.
[0028] Figure 3 for Figure 2 The diagram shows the safety protection device for the cigarette machine from another perspective.
[0029] Figure 4 for Figure 3 The diagram shows the protective body and interlocking switch in the safety protection device of the cigarette machine.
[0030] Figure 5 for Figure 3 The diagram shows the protective cover of the cigarette machine safety device fully open.
[0031] Reference numerals: 100, protective body; 110, receiving cavity; 111, mounting groove; 120, opening; 130, first detection element; 200, interlocking switch; 210, normally open contact; 300, protective cover; 310, second detection element. Detailed Implementation
[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0033] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0034] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0036] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0037] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.
[0038] In the cigarette production process of the tobacco industry, cigarette rolling machines play a crucial role. As a widely used high-speed cigarette production equipment, the ZJ17 cigarette rolling machine's operational safety and stability directly affect production efficiency and the personal safety of operators. The ZJ17 cigarette rolling machine is equipped with a front protective cover, and the interlocking switch of the front protective cover, as a key component ensuring the safe operation of the equipment, bears the important responsibility of monitoring the closing status of the protective cover in real time. Its core function is to ensure that the equipment can only be started and operated when the protective cover is completely closed, thereby effectively preventing operators from coming into contact with the operating mechanical parts inside the equipment due to misoperation or other reasons, avoiding mechanical injuries and various safety accidents.
[0039] The inventors of this application have discovered that the existing ZJ17 cigarette machine front protective cover interlock switch has many problems that urgently need to be solved. First, from a structural perspective, the interlock switch has a large number of parts and an extremely complex overall structure. This not only makes its manufacturing and assembly process relatively cumbersome, but also increases the difficulty of locating and troubleshooting problems if a part malfunctions during daily use and maintenance.
[0040] Secondly, the interlock switch has certain design flaws. Its curved rail contact surface is relatively narrow, making it prone to deformation during long-term operation or under external forces. This deformation further affects the normal operation of the interlock switch, rendering its safety interlock function ineffective and leading to frequent failures. More seriously, each time the safety interlock switch fails, it needs to be replaced. However, due to its complex structure and the cumbersome connection and debugging processes, each replacement consumes a significant amount of time, undoubtedly hindering cigarette production and severely impacting normal production efficiency. Furthermore, once the interlock switch fails, a dangerous situation arises where opening the protective cover fails to stop the equipment in time. This poses a serious safety hazard to on-site operators, who are at risk of mechanical injury from contact with operating equipment parts, threatening their lives.
[0041] Based on this, one embodiment of this application provides a safety protection device for a cigarette machine, which can solve the above-mentioned technical problems. The safety protection device for a cigarette machine provided in one embodiment of this application will now be described in detail with reference to the accompanying drawings.
[0042] See Figures 2 to 5 As shown, one embodiment of this application provides a safety protection device for a cigarette machine. The safety protection device includes a protective body 100, an interlock switch 200, and a protective cover 300. The protective body 100 has a receiving cavity 110 and an opening 120 communicating with the receiving cavity 110. The interlock switch 200 is connected to the cavity wall of the receiving cavity 110. The interlock switch 200 is provided with at least one pair of normally open contacts 210. The protective cover 300 is rotatably connected to the protective body 100. Figure 1 As shown, when the protective cover 300 is in the closed state, the protective cover 300 fits against the protective body 100 to seal the opening 120; as Figure 3 As shown, when the protective cover 300 is in the open state, the normally open contact 210 is in the open state, and the normally open contact 210 extends out of the protective body 100 toward the end face of the protective cover 300 through the opening 120; when the protective cover 300 is in the closed state, the protective cover 300 presses against the normally open contact 210 so that the normally open contact 210 is in the closed state.
[0043] Because the interlock switch 200 has normally open contacts 210, the closed state of the protective cover 300 is detected through these contacts. Therefore, the circuit is only connected when the protective cover 300 is closed, enabling the cigarette machine to start. This more reliably prevents accidental start-up of the equipment when the protective cover 300 is not properly closed, maximizing operator safety and preventing them from coming into contact with internal moving parts. Furthermore, the normally open contact 210 is open under normal conditions, reducing the probability of false triggering compared to normally closed contacts. Focusing on detecting the closed state of the protective cover 300 makes the detection logic clearer and more intuitive; the equipment can only start when the protective cover 300 is fully closed, reducing abnormal operation caused by malfunctions of the interlock switch 200 itself and improving the overall reliability of the equipment in terms of safety protection. When equipment malfunctions due to problems related to the protective cover 300, such as failure to start normally, the normally open contact 210 logic that detects the closure of the protective cover 300 makes it easier to locate the fault by detecting whether the contact is closed normally and whether the relevant circuits are conductive. Maintenance personnel can more quickly determine whether the problem is a mechanical installation issue with the protective cover 300 itself, or a problem with the electrical circuits, switch contacts, etc., thereby performing maintenance more efficiently, reducing equipment downtime, and indirectly improving production efficiency.
[0044] In some embodiments, the protective cover 300 and the protective body 100 can be connected by a hinge. The hinge typically consists of two metal blades and a central pivot. One metal blade is fixed to the protective body by screws or other connectors, while the other is fixed to the protective cover. The pivot allows the two blades to rotate relative to each other, thereby enabling the protective cover to open and close relative to the protective body. In other embodiments, the protective cover 300 and the protective body 100 can be connected by a pivot. This pivot connection is achieved by providing corresponding shaft holes on both the protective body and the protective cover, and then inserting a pivot into them, allowing the protective cover to rotate around the pivot. The pivot can be a solid metal shaft or a hollow tubular structure, depending on the required load-bearing capacity and structural design.
[0045] See Figures 2 to 5As shown, in one embodiment, the interlock switch 200 is further provided with an elastic element connected to the side of the normally open contact 210 away from the protective cover 300. When the protective cover 300 is in the open state, the elastic element drives the normally open contact 210 to extend; when the protective cover 300 is in the closed state, the elastic element is in the compressed state. When the protective cover 300 is in the open state, the elastic element can drive the normally open contact 210 to extend, ensuring that the contact can be stably in the open position in the initial state. This avoids the situation where the contact is mistakenly closed due to other external interference, slight displacement of components, etc., making the initial conditions for equipment start-up control clearer and more reliable, strictly following the logic that the contact only closes after the protective cover 300 is correctly closed, thus ensuring the safety of equipment start-up from the source. During equipment operation, it may be affected by various external factors such as vibration and airflow impact. The setting of the elastic element on the side of the normally open contact 210 away from the protective cover 300 allows the contact to rely on the support and reset function of the elastic element to always maintain the proper open or closed state, and will not easily change its state due to external interference. This enhances the anti-interference capability of the interlock switch 200 under complex working conditions and ensures the accuracy of its detection of the protective cover 300's status.
[0046] Furthermore, when the protective cover 300 is closed, due to the presence of the elastic element, the force applied by the protective cover 300 will first act on the elastic element, causing it to gradually deform and buffer the impact force. This prevents the protective cover 300 from directly and rigidly colliding with the normally open contact 210, reducing damage to the contact caused by the instantaneous impact force. For example, it prevents problems such as contact deformation and accelerated wear, effectively extending the service life of the normally open contact 210 and reducing maintenance costs due to frequent replacements caused by contact damage. During the deformation process, the elastic element can make the contact between the normally open contact 210 and the corresponding contact component more stable and uniform in force distribution, avoiding excessive local pressure that leads to rapid local wear of the contact. This ensures that the contact can conduct with a more reasonable pressure across the entire contact surface, further improving the durability of the contact and helping to maintain the long-term stable operation of the interlocking switch 200.
[0047] See Figures 2 to 5 As shown, in one embodiment, the cigarette machine safety protection device further includes an adjusting member and a fixed base; one end of the elastic member is connected to the fixed base, and the other end is connected to the normally open contact 210 through the adjusting member; by rotating the adjusting member, the force applied by the elastic member to the normally open contact 210 can be adjusted.
[0048] By adjusting the force applied to the normally open contact 210 by the rotating adjusting component, the contact pressure between the normally open contact 210 and the corresponding contact component in the closed state can be precisely controlled. Appropriate contact pressure is crucial for ensuring good electrical conductivity. It avoids problems such as poor contact and unstable signal transmission due to insufficient pressure, which could affect the accurate judgment of the protective cover 300's status and subsequent normal startup. Conversely, it prevents excessive pressure from accelerating contact wear, further extending the contact's service life, and ensuring the long-term stable and reliable operation of the interlock switch 200. Different cigarette machine operating environments, operating frequencies, and manufacturing tolerances may result in variations in the optimal force required for the normally open contact 210. The adjustable structure allows this safety protection device to flexibly adapt to various actual working conditions. For example, in environments with significant vibration, the force can be appropriately increased to ensure the contact remains stably closed under vibration interference. Alternatively, for normally open contacts 210 and related mating components produced in different batches with slight dimensional differences, adjusting the force ensures good mechanical and electrical coordination, improving the device's versatility and compatibility.
[0049] During the installation and commissioning phase of the equipment or during subsequent regular maintenance, if problems such as insensitive closure or abnormal contact resistance are found in the normally open contact 210, maintenance personnel can easily fine-tune the force of the elastic element by rotating the adjustment component to quickly troubleshoot and solve the problem without replacing the entire elastic element or performing other complex operations. This greatly shortens maintenance time, improves the overall maintenance efficiency of the equipment, and reduces production losses caused by equipment downtime.
[0050] In some embodiments, the adjusting element can be in the form of a screw. One end of the screw is connected to the normally open contact 210 (the connection can be achieved through a threaded hole, nut, etc., to ensure the transmission of axial force), and the other end passes through a matching threaded hole on the fixed seat. The screw has a structure such as a knob or wrench slot for easy rotation. An elastic element (such as a spring) is sleeved on the screw, with one end abutting against the fixed seat and the other end abutting against the normally open contact 210 or a connecting component connected to the normally open contact 210. When the screw is rotated, depending on the direction of the thread (left-hand or right-hand), the screw will move axially along the threaded hole of the fixed seat. If the screw is screwed outward (away from the fixed seat), it will stretch the elastic element, increasing its elastic deformation, thereby increasing the force applied to the normally open contact 210; conversely, if the screw is screwed inward (closer to the fixed seat), it will compress the elastic element, decreasing its elastic deformation, and correspondingly decreasing the force applied to the normally open contact 210, thus achieving precise adjustment of the force applied to the elastic element.
[0051] In other embodiments, the adjusting member is a wedge-shaped block with an inclined surface. The wedge-shaped block is placed in a wedge-shaped groove of the fixed base and can slide relative to the groove. A positioning structure (such as a positioning pin engaging with a positioning hole) is provided in the sliding direction to fix the position of the wedge-shaped block. One end of the elastic member is connected to the fixed base, and the other end is connected to the normally open contact 210 through a slider. The slider contacts the inclined surface of the wedge-shaped block and can slide along the inclined surface. When the wedge-shaped block is pushed to slide along the wedge groove, the slider in contact with it will be displaced perpendicular to the surface of the wedge-shaped block due to the action of its inclined surface. When the wedge-shaped block slides away from the fixed base, it will lengthen the elastic member and increase the force on the normally open contact 210; conversely, when the wedge-shaped block slides closer to the fixed base, it will compress the elastic member and reduce the force on the normally open contact 210, thereby achieving adjustment of the force of the elastic member.
[0052] See Figures 2 to 5 As shown, in one embodiment, the cavity wall of the receiving cavity 110 is constructed with a mounting groove 111, and the interlocking switch 200 is disposed within the mounting groove 111. The mounting groove 111 provides a relatively enclosed mounting space for the interlocking switch 200, effectively preventing external dust, debris, and tobacco shreds and other contaminants from the production environment from entering the interior of the interlocking switch 200. If these foreign objects enter the switch, they may accumulate in critical parts such as contacts and mechanical transmission structures, leading to malfunctions such as poor contact and mechanical jamming, affecting the accurate detection of the opening and closing status of the protective cover 300 and the normal operation of the control function of the interlocking switch 200. Through the isolation provided by the mounting groove 111, the possibility of such external factors interfering with the normal operation of the interlocking switch 200 can be greatly reduced, improving its reliability and stability. In the working environment of a cigarette machine, there may be temperature changes, humidity fluctuations, and airflow impacts. The installation slot 111 makes the microenvironment of the interlock switch 200 relatively stable. The cavity wall can buffer the effects of temperature and humidity changes to a certain extent, reducing problems such as moisture or deformation of internal components of the interlock switch 200 caused by environmental factors, or the impact of excessively high or low temperatures on its electrical and mechanical performance. This helps to extend the service life of the interlock switch 200 and ensure its long-term stable operation.
[0053] The walls of the mounting slot 111 provide support and limit the interlock switch 200 from multiple directions, restricting its shaking and displacement during equipment operation. Especially when vibrations occur during cigarette machine operation or when operators apply external impacts such as switching the protective cover 300, the interlock switch 200 remains firmly held within the mounting slot 111, maintaining its normal working posture and coordination with other components. This ensures the integrity of its mechanical structure and the accuracy of the protective cover 300's status detection, guaranteeing the proper functioning of the equipment's safety interlock function. A stable installation position helps maintain the stability of the electrical connection lines of the interlock switch 200, reducing problems such as line pulling and loosening caused by the interlock switch 200's shaking and displacement. This ensures the reliability of the electrical connection, prevents signal interruptions and false signals due to poor line contact, and further enhances the stability and accuracy of the entire safety protection system in terms of electrical control.
[0054] See Figures 2 to 5 As shown, in one embodiment, the cigarette machine safety protection device further includes a first detection element 130, which is disposed on the side of the protective body 100 facing the protective cover 300. The first detection element 130 is used to detect whether the protective cover 300 is in contact with the protective body 100. By setting the first detection element 130 to detect whether the protective cover 300 is in contact with the protective body 100, a double confirmation mechanism is constructed. Even if the interlock switch 200 fails to accurately reflect the true state of the protective cover 300 due to certain faults (such as contact adhesion, mechanical structure jamming, etc.), the first detection element 130 can re-detect and judge from the perspective of fit. If it is detected that the protective cover 300 is not properly fitted, the corresponding safety measures can still be triggered to stop the equipment from running, further reducing the risk of operators accidentally coming into contact with dangerous parts inside the equipment due to the failure of the protective device, and greatly enhancing the reliability of safety protection.
[0055] For cigarette rolling machines, certain protected areas need to maintain a certain degree of airtightness to prevent dust, tobacco, and other impurities from entering the equipment and affecting the normal operation of various components. This also helps maintain stable internal temperature and humidity. The first detection component 130's inspection of the protective cover 300's fit ensures a tight seal between the cover 300 and the protective body 100, guaranteeing a good seal and reducing interference from external factors on the precision components inside the equipment. This helps improve the overall stability of the equipment's operation and reduces the failure rate caused by impurities entering or environmental fluctuations. When equipment malfunctions or safety-related anomalies occur, the fit status information of the protective cover 300 fed back by the first detection component 130 allows maintenance personnel to quickly determine whether a series of problems are caused by a poor fit of the protective cover 300, such as unexpected equipment shutdowns or abnormal noises during operation. This helps narrow down the scope of troubleshooting, more accurately pinpointing whether the problem lies with the installation of the protective cover 300 itself, mechanical structural deformation, or other related component malfunctions, thereby improving maintenance efficiency, reducing equipment downtime, and minimizing the impact on production.
[0056] See Figures 2 to 5 As shown, in one embodiment, the cigarette machine safety protection device further includes a second detection element 310, which is disposed on the side of the protective cover 300 facing the protective body 100; the second detection element 310 is used to detect whether the protective cover 300 is in a closed state.
[0057] If the first detection component 130 fails to function properly for some reason (such as obstruction or component failure), the second detection component 310 can re-detect and confirm the closed state of the protective cover 300 from another angle. As long as one detection mechanism determines that the protective cover 300 is not properly closed, the corresponding safety measures can be triggered in a timely manner to stop the equipment from operating. This greatly reduces the safety risks caused by the failure of a single detection method, enhances the reliability of the entire safety protection device, and comprehensively protects the safety of operators and the stable operation of the equipment.
[0058] Understandably, the programmable logic controller (PLC) and safety relay of the cigarette machine safety protection device, the output terminals of the interlock switch 200, the first detection element 130, and the second detection element 310 are respectively connected to the input terminals of the PLC. The PLC is configured to output a control signal allowing the equipment to start only when the normally open contact 210 of the interlock switch 200 is closed and both the first detection element 130 and the second detection element 310 output valid signals. The safety relay is connected between the output terminal of the PLC and the equipment control circuit, and is used to control the start and stop of the equipment according to the control signal. In some embodiments, the interlock switch 200 can be a ZK4236-11z-M20 model switch. At the same time, the original arc guide rail and rollers are eliminated, and the normally open contact 210 of the interlock switch 200 is directly pressed by the protective cover 300. After the adjustment, the installation and adjustment time of the ZJ17 cigarette machine interlock switch 200 was reduced from 29.1 minutes before the improvement to 4.6 minutes after the improvement. The significant reduction in installation and adjustment time has played a positive role in improving equipment operating efficiency and reducing costs.
[0059] See Figures 2 to 5 As shown, in one embodiment, both the first detection element 130 and the second detection element 310 are reflective photoelectric sensors with a detection distance of 50mm-100mm and a response time of less than 1ms. This distance range ensures that the sensor accurately detects whether the protective cover 300 is tightly attached to the protective body 100. It avoids false triggering due to excessive distance (e.g., misjudging attachment before the protective cover 300 is fully in place during normal closing) and also avoids ineffective detection due to excessive distance (e.g., a detection blind zone, preventing signal transmission even if the protective cover 300 is not attached). This allows for accurate judgment of the attachment status of the protective cover 300, improving the reliability of the safety protection device detection. Its response time of less than 1ms means that when the attachment status of the protective cover 300 changes, the sensor can capture this change almost instantly and send back the corresponding signal. In high-speed operating environments like cigarette machines, equipment states change rapidly, and any slight delay can lead to safety hazards not being detected and addressed in a timely manner. Such a rapid response speed ensures that the information on whether the protective cover 300 is in place is transmitted to the control system in the first instance, enabling the control system to react quickly, such as stopping the equipment operation in time or issuing corresponding alarm prompts, so as to maximize the safety of equipment operation and the personal safety of operators.
[0060] In one embodiment, the cigarette machine safety protection device further includes an elastic buffer, which is disposed on the contact surface of one of the protective cover and the protective body for contact with the other. During the opening and closing of the protective cover, a certain amount of impact force is inevitably generated, especially when the operator operates quickly or when the protective cover accidentally shakes due to vibration during equipment operation. This impact force may damage the protective cover, the protective body, and related connecting components (such as interlocking switches and detection devices). The elastic buffer can effectively absorb and buffer these impact forces, preventing deformation, wear, loosening, or even damage to components due to rigid collisions. For example, it prevents dents from appearing on the surface of the protective body and displacement of interlocking switch contacts due to vibration, thereby extending the service life of each component, reducing the frequency of repair or replacement due to component damage, and lowering equipment maintenance costs.
[0061] Without an elastic buffer, when the protective cover closes, impact forces or unstable fit may cause abnormal external interference to safety protection components such as interlock switches and detection devices, leading to false triggering or misjudgment (e.g., interlock switches closing prematurely due to vibration, detection devices misdetecting improper fit of the protective cover due to shaking). An elastic buffer reduces the impact of such abnormal external forces, allowing each safety protection component to accurately detect and judge the true state of the protective cover in a relatively stable environment. This ensures that the safety devices operate according to normal logic, avoids unnecessary equipment downtime or false alarms of safety risks, and improves the accuracy and reliability of the safety protection system. In one embodiment, the elastic buffer is disposed on the protective cover. In other embodiments, the elastic buffer may also be disposed on the protective body.
[0062] In one embodiment, the cigarette machine safety protection device further includes a positioning groove and a positioning element for interlocking with the positioning groove; one of the positioning element and the positioning groove is disposed on the protective cover, and the other is disposed on the protective body. During installation of the protective cover, the interlocking of the positioning groove and the positioning element provides accurate installation position guidance for the protective cover, ensuring that the protective cover is accurately installed into the predetermined position on the protective body each time. This is crucial for ensuring the relative positional relationship between the protective cover and the protective body, ensuring that safety-related components such as interlocking switches and detection elements are in the correct working position, guaranteeing that they can accurately detect and control the opening and closing state and fit of the protective cover, avoiding detection failures and inaccurate triggering due to installation position deviations, thereby ensuring the effective functioning of the entire safety protection device. In some embodiments, the positioning element can be disposed on the protective cover, and the positioning groove can be disposed on the protective body. In other embodiments, the positioning element can be disposed on the protective body, and the positioning groove can be disposed on the protective cover. The positioning element can be a positioning pin.
[0063] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0064] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A safety guard for a cigarette making machine, characterized in that, The safety protection device for the cigarette rolling machine includes: The protective body (100) has a receiving cavity (110) and an opening (120) communicating with the receiving cavity (110). An interlocking switch (200) is connected to the cavity wall of the receiving cavity (110); the interlocking switch (200) is provided with at least one pair of normally open contacts (210). A protective cover (300) is rotatably connected to the protective body (100); when the protective cover (300) is in the closed state, the protective cover (300) fits against the protective body (100) to close the opening (120). When the protective cover (300) is in the open state, the normally open contact (210) is in the open state, and the normally open contact (210) extends out of the protective body (100) through the opening (120) towards the end face of the protective cover (300); when the protective cover (300) is in the closed state, the protective cover (300) presses against the normally open contact (210) so that the normally open contact (210) is in the closed state.
2. The safety shield for a cigarette making machine of claim 1, wherein, The interlocking switch (200) is also provided with a spring element, which is connected to the side of the normally open contact (210) away from the protective cover (300); When the protective cover (300) is in the open state, the elastic element drives the normally open contact (210) to extend; When the protective cover (300) is in the closed state, the elastic element is in a compressed state.
3. The safety shield for a cigarette making machine of claim 2, wherein, The safety protection device for the cigarette machine also includes an adjusting component and a fixed base; one end of the elastic component is connected to the fixed base, and the other end is connected to the normally open contact (210) through the adjusting component; By rotating the adjusting member, the force exerted by the elastic member on the normally open contact (210) can be adjusted.
4. The safety protection device for a cigarette rolling machine according to claim 1, characterized in that, The cavity wall of the receiving cavity (110) is constructed with a mounting groove (111), and the interlocking switch (200) is disposed in the mounting groove (111).
5. The safety protection device for a cigarette rolling machine according to any one of claims 1 to 4, characterized in that, The safety protection device for the cigarette machine also includes a first detection element (130), which is disposed on the side of the protective body (100) facing the protective cover (300); the first detection element (130) is used to detect whether the protective cover (300) is attached to the protective body (100).
6. The safety shield for a cigarette making machine of claim 5, wherein, The first detection element (130) is a reflective photoelectric sensor with a detection distance of 50mm-100mm and a response time of less than 1ms.
7. A safety guard for a cigarette making machine according to any one of claims 1 to 4, wherein The safety protection device for the cigarette machine also includes a second detection element (310), which is disposed on the side of the protective cover (300) facing the protective body (100); the second detection element (310) is used to detect whether the protective cover (300) is in the closed state.
8. The safety shield for a cigarette making machine of claim 7, wherein, The second detection element (310) is a reflective photoelectric sensor with a detection distance of 50mm-100mm and a response time of less than 1ms.
9. A safety guard for a cigarette making machine according to any one of claims 1 to 4, wherein, The safety protection device for the cigarette machine also includes an elastic buffer, which is disposed on the contact surface of one of the protective cover (300) and the protective body (100) for fitting with the other.
10. The safety shield for a cigarette making machine according to any one of claims 1 to 4, wherein The cigarette machine safety protection device also includes a positioning groove and a positioning component for insertion into the positioning groove; One of the positioning element and the positioning groove is disposed on the protective cover (300), and the other is disposed on the protective body (100).