Chain self-cleaning device and automatic glue sprayer comprising same

Abstract

The invention provides a chain self-cleaning device and an automatic glue sprayer comprising the same, relates to the technical field of automatic glue spraying equipment, and solves the technical problems that a chain cannot be self-cleaned and is easy to pollute, and materials are damaged. The chain self-cleaning device is arranged at one end or two ends of a chain conveying line and comprises a cleaning box and a cleaning brush, one end or two ends of the chain conveying line are provided with extending parts protruding downwards; the conveying chain sleeves the outer side of the extension part; the cleaning box covers the outer side of the extension part; the cleaning brush is arranged in an inner cavity of the cleaning box so as to clean the passing conveying chain; the automatic glue sprayer comprises an installation fixing plate, a conveying chain assembly, at least one sensor, at least one blocking assembly and a width adjusting assembly. The width of the conveying chain can be adjusted according to different PCB widths, manual work can be replaced for automatic feeding and discharging, step-by-step feeding and discharging and automatic cleaning of the chain can be achieved, and high-efficiency spraying work of the glue sprayer is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic glue spraying equipment, in particular to a chain self-cleaning device and an automatic glue spraying machine comprising the same. Background Art

[0002] With the continuous development of industrial modernization and the continuous improvement of people's living standards, various household appliances have entered the homes of the general public, greatly improving people's lifestyles. Household appliances have become an indispensable part of many families. But at the same time, there are higher requirements for the safety of electrical components. As an important electronic component, the printed circuit board (PCB) is the support of electronic components, so this requires the PCB board to have high safety, so a layer of glue is often applied on its surface after the PCB board is soldered.

[0003] Initially, the coating of PCB's three-proof glue or paint and other materials was done manually or semi-automatically, which had the problems of high labor intensity and low efficiency. Later, automatic coating was adopted. The automatic glue spraying machine uses online automatic spraying, which can not only reduce labor intensity, but also improve the quality and efficiency of spraying; it can also ensure the stability of the glue spraying, and ensure the thickness and width of the glue spraying.

[0004] The applicant has found that the prior art has at least the following technical problems: as the chain for loading and unloading materials in the glue spraying machine, its clean design is particularly important. If the chain is contaminated, the transmission will be stuck, which will affect the PCB board over time and cause material damage. Summary of the invention

[0005] The purpose of the present invention is to provide a chain self-cleaning device and an automatic glue spraying machine comprising the same, so as to solve the technical problems existing in the prior art that the chain cannot be self-cleaned, is easily contaminated, and causes material damage.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] In a first aspect, the present invention provides a chain self-cleaning device, which is arranged at one end or both ends of a chain conveyor line, and the chain self-cleaning device comprises a cleaning box and a cleaning brush; wherein:

[0008] One or both ends of the chain conveyor line are provided with an extension protruding downward;

[0009] The conveyor chain sleeve is arranged outside the extension portion;

[0010] The cleaning box cover is arranged outside the extension portion;

[0011] The cleaning brush is arranged in the inner cavity of the cleaning box to clean the conveying chain passing through.

[0012] The chain self-cleaning device provided by the present invention can realize automatic cleaning of the chain in the automatic glue spraying machine when it moves, avoiding the chain from contaminating the PCB board, not only prolonging the service life of the chain, but also preventing jamming after being contaminated, thereby ensuring the long-term stable, safe and efficient operation of the equipment.

[0013] As a further improvement of the present invention, the number of the cleaning brushes is two, which are arranged side by side along the length direction of the cleaning box.

[0014] As a further improvement of the present invention, the cleaning brush is formed by a plurality of bristles arranged in an array, and the specification of the cleaning brush in the vertical direction is larger than the width of the conveying chain.

[0015] As a further improvement of the present invention, a mounting portion is provided on the top of a side of the cleaning box away from the cleaning brush, for mounting the chain self-cleaning device on the chain conveying line.

[0016] In a second aspect, the present invention provides an automatic glue spraying machine, comprising a chain conveyor line and the chain self-cleaning device installed on the chain conveyor line.

[0017] As a further improvement of the present invention, the chain conveyor line includes a mounting plate, a conveying chain assembly, at least one sensor, and at least one blocking assembly; wherein:

[0018] The conveying chain assembly is mounted on the mounting fixing plate;

[0019] At least one of the sensors is disposed at intervals in different sections of the conveyor chain assembly to sense whether a PCB board is in place in different sections;

[0020] Each of the blocking components is arranged between two adjacent sections to separate the PCB boards located in different sections, thereby forming a step-by-step feeding structure.

[0021] The automatic glue spraying machine of the present invention forms a step-by-step feeding structure by arranging a plurality of blocking elements and sensors on the chain conveyor line, and can control the PCB board to be automatically in place, thereby achieving stable and reliable supply.

[0022] As a further improvement of the present invention, the blocking assembly includes a fixing block, a mounting bracket 252, a moving cylinder, and a blocking element; wherein:

[0023] The mounting bracket 252 is fixed on the conveying chain assembly;

[0024] The moving cylinder and the fixing block are both fixed on the mounting bracket 252;

[0025] The middle portion of the blocking element is rotatably disposed on the fixing block;

[0026] One end of the blocking element is transmission-connected to the moving cylinder, and the other end is located above the conveying chain assembly; when the moving cylinder is started, it can drive the blocking element to rotate around the axis to block the PCB board located on the conveying chain assembly, thereby forming step-by-step feeding.

[0027] As a further improvement of the present invention, the conveying chain assembly includes two conveying chains arranged side by side; it also includes a width adjustment assembly located at the bottom of the mounting fixed plate and connected to one of the conveying chains, and the width of the chain conveying line can be adjusted through the width adjustment assembly.

[0028] As a further improvement of the present invention, the width adjustment assembly includes a width adjustment motion motor, a synchronous wheel, a synchronous belt, a lead screw, a linear bearing, a slider connecting plate, a slide rail, and a slider; wherein:

[0029] Both ends of the conveyor chain are connected to the slider through chain motion component mounting plates respectively;

[0030] The two sliding blocks are slidably connected to the two sliding rails respectively;

[0031] There are two screw rods, which are located inside the two slide rails;

[0032] The linear bearings are respectively connected to the two screw rods;

[0033] The linear bearing is installed at the bottom of the slider connecting plate, and the two ends are respectively connected to the two sliders;

[0034] The synchronous wheel is arranged at the ends of the two screw rods;

[0035] The synchronous belt is sleeved on the two synchronous wheels;

[0036] The width-adjusting motion motor is connected to one of the synchronous wheels.

[0037] As a further improvement of the present invention, a supporting transmission wheel is further arranged between the two synchronous wheels, and the synchronous belt is sleeved on the supporting transmission wheel.

[0038] The present invention provides a width adjustment component, thereby solving the problem of low efficiency of manual chain width adjustment when different PCB boards are replaced for production. The present invention can automatically adjust the chain width, improve operating efficiency, save manpower, reduce costs, and reduce the possibility of personal injury. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 It is a structural schematic diagram of a chain conveyor line in the automatic glue spraying machine of the present invention in a step-by-step feeding state;

[0041] Figure 2 It is a state diagram of a blocking component in a chain conveying line of an automatic glue spraying machine of the present invention when it is opened;

[0042] Figure 3 It is a structural schematic diagram of a chain transmission line in the automatic glue spraying machine of the present invention;

[0043] Figure 4 It is a schematic diagram of the structure of two conveyor chains in the chain conveyor line of the automatic glue spraying machine of the present invention;

[0044] Figure 5 It is a schematic diagram of the installation structure of the chain self-cleaning device of the present invention;

[0045] Figure 6 It is a top view of a width adjustment component in a chain conveyor line of an automatic glue spraying machine of the present invention;

[0046] Figure 7 It is a structural schematic diagram of a blocking component in a chain conveying line of an automatic glue spraying machine of the present invention;

[0047] Figure 8 It is a three-dimensional structural schematic diagram of a width adjustment component in a chain conveyor line of an automatic glue spraying machine of the present invention;

[0048] Fig. 9 It is a three-dimensional structural schematic diagram of the chain self-cleaning device of the present invention.

[0049] In the figure, 1, chain self-cleaning device; 11, cleaning box; 12, cleaning brush; 13, installation part; 2, chain transmission line; 21, extension part; 22, installation fixing plate; 23, conveying chain assembly; 231, conveying chain; 2311, installation block; 2312, front section driven teeth; 2313, front section moving chain teeth; 2314, chain guard; 2315, rear section moving chain teeth; 2316, rear section driven teeth; 2317, rear section chain; 2318, rear section moving motor; 2319, front section moving motor; 2310, front section chain; 232, chain moving assembly installation plate; 233, chain moving assembly fixing plate ; 24. Sensor; 241. Head end sensor; 242. End sensor; 243. Sensor mounting part; 25. Front section blocking assembly; 26. Rear section blocking assembly; 251. Fixing block; 252. Mounting bracket; 253. Rear section motion cylinder; 254. Front section motion cylinder; 255. Front section blocking element; 256. Rear section blocking element; 26. Width adjustment assembly; 261. Width adjustment motion motor; 262. Synchronous wheel; 263. Synchronous belt; 264. Screw; 265. Linear bearing; 266. Slider connecting plate; 267. Slide rail; 268. Slider; 269. Support transmission wheel; 3. Screw mounting plate seat. DETAILED DESCRIPTION

[0050] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0051] like Figure 1-Figure 5 , Fig. 9 As shown, the present invention provides a chain self-cleaning device 1, which is arranged at one end or both ends of a chain conveyor line 2. By being arranged at the end of the chain conveyor line 2, glue is prevented from entering the cleaning box 11 during spraying. The chain self-cleaning device 1 includes a cleaning box 11 and a cleaning brush 12; wherein:

[0052] One end or both ends of the chain conveyor line 2 are provided with a downwardly protruding extension 21; the extension 21 is provided to facilitate the insertion of the cleaning box 11, so that the conveying chain 231 can enter the cleaning box 11 and be brushed by the cleaning brush 12;

[0053] The conveying chain 231 is sleeved on the outside of the extension part 21;

[0054] The cleaning box 11 is covered on the outside of the extension portion 21;

[0055] The cleaning brush 12 is arranged in the inner cavity of the cleaning box 11 to clean the conveying chain 231 passing through.

[0056] It should be noted that a chain self-cleaning device 1 can be provided at one end of the chain conveyor line 2, so that the chain can be self-cleaned on one side. Of course, chain self-cleaning devices 1 can also be provided at both ends of the chain conveyor line 2, so that both sides of the chain can be cleaned. Of course, the best embodiment is to provide chain self-cleaning devices 1 at both ends of the chain conveyor chain. The following is a specific description taking the chain self-cleaning devices 1 provided at both ends as an example.

[0057] The chain self-cleaning device 1 provided by the present invention can realize automatic cleaning of the chain in the automatic glue spraying machine during movement, avoiding the chain from contaminating the PCB board, which not only increases the service life of the chain, but also prevents jamming after being contaminated, thereby ensuring the long-term stable, safe and efficient operation of the equipment.

[0058] As a further improvement of the present invention, there are two cleaning brushes 12 , which are arranged side by side along the length direction of the cleaning box 11 .

[0059] Through this structural arrangement, the conveying chain 231 entering the cleaning box 11 can achieve two-stage cleaning, further improving the cleaning effect.

[0060] In order to ensure the cleaning effect, the cleaning brush 12 is composed of a plurality of bristles arranged in an array. The specifications of the cleaning brush 12 in the vertical direction are greater than the width of the conveyor chain 231. Furthermore, considering the hardness of the conveyor chain 231 and the stickiness of the glue dripping on the conveyor chain 231, in this embodiment, the bristles of the cleaning brush 12 are installed inside the cleaning box 11 by screws and are in close contact with the conveyor chain. The bristles of the cleaning brush 12 can be made of hard materials such as fine steel wire.

[0061] Working principle: When the conveyor chain 231 undergoes a series of feeding and spraying movements, it will be cleaned in the cleaning box 11 component during operation, achieving an automatic cleaning effect, and it can be cleaned as long as the chain moves.

[0062] As a further improvement of the present invention, in order to facilitate installation and avoid interference of the chain self-cleaning component with other components and increase of occupied space, in the present invention, a mounting portion 13 is provided on the top of the side of the cleaning box 11 away from the cleaning brush 12, for installing the chain self-cleaning device 1 on the chain conveyor line 2.

[0063] The setting of the chain self-cleaning device 1 of the present invention can realize the self-cleaning of the conveyor chain 231, and there is no need to manually perform the glue and varnish removal operation of the conveyor chain 231, thereby avoiding the traditional manual operation. Due to the particularity of glue, it is a harmful substance and the odor is easy to emit. In the case of insufficient ventilation, personnel need to wear respiratory protection equipment to avoid contact with the skin and inhalation of gas to cause inconvenience in operation, and avoid the problem of easy human injury during long-term operation; and the glue is sticky, and labor protection gloves need to be worn during manual cleaning, which will also be inconvenient for long-term work.

[0064] like Figure 1-Figure 9 As shown, the present invention provides an automatic glue spraying machine, including a chain conveying line 2 and a chain self-cleaning device 1 installed on the chain conveying line 2.

[0065] The chain self-cleaning device 1 is arranged at both ends of the chain conveying line 2, so as to realize self-cleaning of both ends of the conveying chain 231, and also prevent glue from entering the cleaning box 11 during spraying.

[0066] As a further improvement of the present invention, the chain conveyor line 2 includes a mounting plate 22, a conveying chain assembly 23, at least one sensor 24, and at least one blocking assembly; wherein:

[0067] The conveyor chain assembly 23 is mounted on the mounting plate 22; the mounting plate 22 is a part that connects the components to the frame, and has various threaded holes for mounting and fixing the components;

[0068] At least one sensor 24 is arranged at intervals in different sections of the conveyor chain assembly 23 to sense whether a PCB board is in place in different sections;

[0069] Each blocking assembly is arranged between two adjacent sections to separate the PCB boards located in different sections, thereby forming a step-by-step feeding structure.

[0070] In this embodiment, if Figure 1-Figure 9 As shown, there are three sensors 24, which are respectively installed at the head end, middle section and end of the conveying chain assembly 23, namely the head end sensor 241, the middle section sensor 24 and the end sensor 242; each sensor 24 is fixed to the aluminum profile of the conveying chain assembly 23 through a sensor mounting part 243.

[0071] There are two blocking components, namely a front blocking component 25 and a rear blocking component. The front blocking component 25 is installed between the first section and the second section, and the rear blocking component is installed between the second section and the third section; the head end sensor 241 is installed in the first section, the middle section sensor 24 is installed in the second section, and the end sensor 242 is installed in the third section.

[0072] The automatic glue spraying machine of the present invention forms a step-by-step feeding structure by arranging a plurality of blocking elements and sensors 24 on the chain conveyor line 2, and can control the PCB board to be automatically in place, thereby achieving stable and reliable supply.

[0073] As a further improvement of the present invention, Figure 7 As shown, the blocking assembly includes a fixing block 251, a mounting bracket 252, a moving cylinder, and a blocking element; wherein:

[0074] The mounting bracket 252 is fixed on the conveying chain assembly 23;

[0075] The moving cylinder and the fixing block 251 are both fixed on the mounting bracket 252, and the mounting bracket 252 is fixed on the aluminum profile;

[0076] The middle part of the blocking element is rotatably arranged on the fixed block 251, that is, the fixed end of the blocking element is fixed on the fixed block 251, and the movable end of the blocking element is installed on the moving cylinder, and the lifting and lowering action is realized by the telescopic movement of the cylinder. As the main element of the step-by-step feeding of the glue spraying machine, it mainly separates the PCB board according to the working area and the non-working area to ensure that there will be no wrong spraying when the glue spraying machine is working. When the PCB board passes by the sensor 24, after the sensor 24 receives the signal, it controls the movement of the moving cylinder, and the blocking element connected to it can realize the lifting or falling action according to the situation.

[0077] Between the blocking element of the front blocking assembly 25 and the blocking element of the rear blocking assembly is the spraying area of ​​the glue spraying machine.

[0078] One end of the blocking element is transmission-connected to the moving cylinder, and the other end is located above the conveying chain assembly 23; when the moving cylinder is started, it can drive the blocking element to rotate around the axis to block the PCB board located on the conveying chain assembly 23, thereby forming step-by-step feeding.

[0079] In this embodiment, there are two blocking components. The front blocking component 25 includes a fixed block 251, a mounting bracket 252, a front moving cylinder 254, and a front blocking element 255; the rear blocking component includes a fixed block 251, a mounting bracket 252, a rear moving cylinder 253, and a rear blocking element 256.

[0080] The front blocking assembly 25 and the rear blocking assembly are mounted on an aluminum profile, and a plurality of mounting holes are punched on the aluminum profile.

[0081] As a further improvement of the present invention, the conveyor chain assembly 23 includes two conveyor chains 231 arranged side by side; each conveyor chain 231 includes mounting blocks 2311 at both ends, front driven teeth 2312, front motion chain teeth 2313, chain guards 2314, rear motion chain teeth 2315, rear driven teeth 2316, rear chain 2317, front chain 2310, rear motion motor 2318, front motion motor 2319; wherein: the front driven teeth 2312 are connected by mounting blocks 2311 is fixed on the extension 21 of the front end of the aluminum profile; the rear section driven tooth 2316 is fixed on the extension 21 of the rear end of the aluminum profile through the mounting block 2311; the front section motion chain teeth 2313 and the rear section motion chain teeth 2315 are arranged in sequence; the front section chain 2310 is wound on the front section driven teeth 2312 and the front section motion chain teeth 2313, and the rear section chain 2317 is wound on the rear section driven teeth 2316 and the rear section motion chain teeth 2315; the chain guard 2314 is set on the top of the conveyor chain 231. The front section motion motor 2319 is fixed on the lower part of the aluminum profile by screws and is in transmission connection with the front section motion chain teeth 2313, and the rear section motion motor 2318 is installed on the lower part of the aluminum profile by screws and is in transmission connection with the rear section motion chain teeth 2315. The aluminum profile is provided with limit grooves for the front and rear chain 2317 so that the chain can move under the motion of the motion motor. The chain guard 2314 is fixed on the top of the aluminum profile by screws; the sensor 24 mounting plate is fixed on the back of the aluminum profile by screws; the mounting plate is fixed on the bottom of the aluminum profile by screws; and the front and rear driven teeth 2316 are fixed on the mounting block 2311 by screws.

[0082] The conveyor chain assembly 23 also includes a width adjustment assembly 26 located at the bottom of the mounting plate 22 and connected to one of the conveyor chains. The width of the chain conveyor line 2 can be adjusted by the width adjustment assembly 26 to accommodate the conveying of PCB boards of different specifications. The bottom of the other conveyor chain 231 is fixed to the mounting plate 22 through a chain motion assembly fixing plate 233. Specifically, the chain motion assembly mounting plate has mounting holes and is fixed to the mounting plate 22 by screws.

[0083] When the spraying action is completed, the rear-stage blocking element 256 is lifted, and the rear-stage motion motor 2318 works again to drive the rear-stage chain 2317 to rotate and transport the PCB board out of the equipment until the second PCB board passes the end sensor 242. The end sensor 242 then controls the rear-stage motion motor 2318 to stop moving and the rear-stage blocking element 256 to fall, completing a complete set of step-by-step feeding actions.

[0084] The movement principle of the front chain 2310: When the front motion motor 2319 receives the signal from the head end sensor 241 and the front blocking element 255 is lifted, the front motion motor 2319 responds and drives the front motion chain teeth 2313 connected thereto to rotate, and then drives the front chain 2310 to rotate to transport the PCB board. The front driven teeth 2312 are used to support the chain, and the chain guard 2314 protects the safety of personnel after misoperation during the chain rotation process, and can also protect the chain from glue splashing to a certain extent.

[0085] The movement principle of the rear section chain 2317 is composed of the rear section movement motor 2318, the rear section movement chain teeth 2315, the rear section chain 2317, the rear section driven teeth 2316, the mounting block 2311, the chain guard 2314, the chain movement component mounting plate, the chain movement component mounting plate 232, etc. The movement principle is the same as the front section chain 2310, the difference is that when the first PCB board reaches the rear section blocking element 256, the middle section sensor 24 installed at its detection position senses the arrival of the first PCB board, and will issue a command to the front section movement motor 2319 after 4-5 seconds to stop the movement, that is, the front section chain 2310 stops. At the same time, the front section movement cylinder 254 drives the front section blocking element 255 to fall to block the subsequent feeding action.

[0086] As an optional embodiment of the present invention, Figure 3 , Figure 6 , Figure 8 As shown, the width adjustment component 26 includes a width adjustment motion motor 261, a synchronous wheel 262, a synchronous belt 263, a screw rod 264, a linear bearing 265, a slider connecting plate 266, a slide rail 267, and a slider 268; the width adjustment component 26 is mounted and fixed on the mounting plate 22; wherein:

[0087] The two ends of the conveyor chain 231 are connected to the plate on the top of the slider 268 through the chain motion assembly mounting plate 232;

[0088] The two sliders 268 are respectively slidably connected to the two slide rails 267 and can move on the slide rails 267;

[0089] There are two screw rods 264, which are located inside the two slide rails 267; both ends of the screw rod 264 are fixed to the mounting plate 22 through the screw rod 264 mounting plate seat, and can rotate in the screw rod 264 mounting plate seat; the screw rod 264 mounting plate seat is fixed to the mounting plate 22 by screws;

[0090] The linear bearing 265 is connected to the two screw rods 264 respectively;

[0091] A linear bearing 265 is installed at the bottom of the slider connecting plate 266, and the two ends are respectively connected to two sliders 268; when the lead screw rotates, the linear bearing 265 can complete the movement on the lead screw, converting the rotation of the lead screw into linear motion, and then driving the slider 268 to complete the movement;

[0092] The synchronous wheel 262 is arranged at the ends of the two screw rods 264;

[0093] The synchronous belt 263 is sleeved on the two synchronous wheels 262; when the width adjustment movement motor 261 moves, the synchronous belt 263 also moves, thereby driving the lead screw to rotate.

[0094] The width adjustment motion motor 261 is connected to one of the synchronous wheels 262. The width adjustment motion motor 261 mounting plate is fixed on the mounting fixing plate 22 by screws, and the width adjustment motion motor 261 is fixed on the width adjustment motion motor 261 mounting plate by screws.

[0095] As a further improvement of the present invention, a supporting transmission wheel 269 is further arranged between the two synchronous wheels 262 , and the synchronous belt 263 is sleeved on the supporting transmission wheel 269 .

[0096] Working principle: When switching PCB boards, the board width data must be input into the computer of the automatic glue spraying machine in advance. When the computer receives the data, it sends a command to the width adjustment motion motor 261 of the width adjustment component 26. The width adjustment motion motor 261 is installed on the mounting fixed plate 22 through the width adjustment motion motor 261 mounting plate. When the width adjustment motion motor 261 rotates to drive the synchronous belt 263 connected thereto to move, the lead screw 264 connected to the synchronous belt 263 also starts to move, and the lead screw drives the slider 268 to move, and the slider 268 is connected to the chain motion component mounting plate 232, thereby driving the entire conveyor line to move to achieve the effect of width adjustment.

[0097] The working principle of the automatic glue spraying machine of the present invention is as follows: when the unloading component of the PCB board automatic board inserting machine or the finished PCB board is manually placed on the conveying chain 231 of the glue spraying machine, the head end sensor 241 senses the arrival of materials and sends a command to the front section motion motor 2319 of the front section chain 2310 motion component, and the front section motion motor 2319 drives the front section chain 2310 to rotate. The PCB board will enter the interior of the equipment under the action of the front section chain 2310. When the PCB board reaches the position of the front section blocking component 25, the front section blocking element 255 in the front section blocking component 25 is controlled to lift (At this time, the front blocking element 255 is always in the lifted state), the middle section sensor 24 also synchronously transmits instructions to the rear section motion motor 2318 of the rear section chain 2317 motion assembly, and the rear section motion motor 2318 drives the rear section chain 2317 to rotate. Under the action of the rear section chain 2317, the PCB board will enter the rear section blocking assembly position (the area between the front section blocking element 255 and the rear section blocking element 256 is the glue spraying working area of ​​the glue sprayer), and at the same time, the second PCB board also enters the working area through the front section blocking element 255 under the action of the front section chain 2310. When the middle section sensor 24 installed at the rear section blocking assembly position senses that the first PCB board has arrived at the rear section blocking assembly position 4-5s (the current chain speed takes 4-5s to pass through one board), it transmits a feedback signal to the front section motion cylinder 254 of the front section blocking assembly 25, and the front section blocking element 255 falls, and the feeding stops (because this equipment uses two nozzles for spraying, so only two PCB boards are allowed to enter each time). The equipment enters the glue spraying operation. When the glue spraying is completed, that is, when the equipment program is completed, the rear section blocking element 256 is lifted, and at the same time, the rear section chain 2317 rotates to transport the PCB board after the glue spraying out of the equipment. When the second PCB board passes the middle section sensor 24, the rear section chain 2317 stops moving and the rear section blocking element 256 falls. During the rotation of the entire chain, the cleaning box components installed at the beginning and end will automatically clean the chain.

[0098] The present invention provides a width adjustment component 26, so as to solve the problem of low efficiency of manual adjustment of chain width when replacing different PCB boards for production. The chain width can be automatically adjusted, so as to improve operation efficiency, save manpower, reduce costs, and reduce the possibility of personal injury. The automatic glue spraying machine of the present invention can be used in combination with the unloading component of the automatic PCB board insertion machine.

[0099] The automatic glue spraying machine of the present invention realizes automation in the loading and unloading and cleaning processes, and greatly improves production efficiency; the sheet material transportation is stable and reliable, which can reduce labor costs and is less affected by temperature, labor efficiency, etc.

[0100] First of all, it should be explained here that “inward” refers to the direction toward the center of the accommodating space, and “outward” refers to the direction away from the center of the accommodating space.

[0101] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0102] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0103] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0104] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0105] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0106] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A chain self-cleaning device, characterized in that: The chain self-cleaning device is arranged at one or both ends of the chain conveyor line, and includes a cleaning box and a cleaning brush; wherein: One or both ends of the chain conveyor line are provided with an extension protruding downward; The conveyor chain sleeve is arranged outside the extension portion; The cleaning box cover is arranged outside the extension portion; The cleaning brush is arranged in the inner cavity of the cleaning box to clean the conveying chain passing through.

2. The chain self-cleaning device according to claim 1, characterized in that: The number of the cleaning brushes is two, and they are arranged side by side along the length direction of the cleaning box.

3. The chain self-cleaning device according to claim 2, characterized in that: The cleaning brush is formed by a plurality of bristles arranged in an array, and the specification of the cleaning brush in the vertical direction is larger than the width of the conveying chain.

4. The chain self-cleaning device according to claim 1, characterized in that: A mounting portion is provided on the top of one side of the cleaning box away from the cleaning brush, and is used to mount the chain self-cleaning device on the chain conveying line.

5. An automatic glue spraying machine, characterized in that: The invention comprises a chain conveying line and a chain self-cleaning device as claimed in any one of claims 1 to 4 installed on the chain conveying line.

6. The automatic glue spraying machine according to claim 5, characterized in that: The chain conveyor line includes a mounting plate, a conveying chain assembly, at least one sensor, and at least one blocking assembly; wherein: The conveyor chain assembly is mounted on the mounting fixing plate; At least one of the sensors is disposed at intervals in different sections of the conveyor chain assembly to sense whether a PCB board is in place in different sections; Each of the blocking components is arranged between two adjacent sections to separate the PCB boards located in different sections, thereby forming a step-by-step feeding structure.

7. The automatic glue spraying machine according to claim 6, characterized in that: The blocking assembly includes a fixed block, a mounting bracket 252, a moving cylinder, and a blocking element; wherein: The mounting bracket 252 is fixed on the conveying chain assembly; The moving cylinder and the fixing block are both fixed on the mounting bracket 252; The middle portion of the blocking element is rotatably disposed on the fixing block; One end of the blocking element is transmission-connected to the moving cylinder, and the other end is located above the conveying chain assembly; when the moving cylinder is started, it can drive the blocking element to rotate around the axis to block the PCB board located on the conveying chain assembly, thereby forming step-by-step feeding.

8. The automatic glue spraying machine according to claim 6, characterized in that: The conveyor chain assembly includes two conveyor chains arranged side by side; and also includes a width adjustment assembly located at the bottom of the mounting plate and connected to one of the conveyor chains, through which the width of the chain transmission line can be adjusted.

9. The automatic glue spraying machine according to claim 8, characterized in that: The width adjustment assembly includes a width adjustment motion motor, a synchronous wheel, a synchronous belt, a lead screw, a linear bearing, a slider connecting plate, a slide rail, and a slider; wherein: Both ends of the conveyor chain are connected to the slider through chain motion component mounting plates respectively; The two sliding blocks are slidably connected to the two sliding rails respectively; There are two screw rods, which are located inside the two slide rails; The linear bearings are respectively connected to the two screw rods; The linear bearing is installed at the bottom of the slider connecting plate, and the two ends are respectively connected to the two sliders; The synchronous wheel is arranged at the ends of the two screw rods; The synchronous belt is sleeved on the two synchronous wheels; The width adjustment motion motor is connected to one of the synchronous wheels.

10. The automatic glue spraying machine according to claim 9, characterized in that: A supporting transmission wheel is also arranged between the two synchronous wheels, and the synchronous belt is sleeved on the supporting transmission wheel.

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