Sheet feeding system and process based on sheet middle arching separation

Abstract

The invention discloses a sheet feeding system and process based on middle arching separation of sheets, the feeding system comprises a material table, a plurality of auxiliary material rods and a jacking mechanism, a layering module is formed on each auxiliary material rod, a plurality of layering tooth grooves are formed in the layering module, and the jacking mechanism is arranged on the material table. The inner side walls of the auxiliary material rods, the layered tooth grooves and the top face of the material table form a feeding area, and pre-layered material grooves are formed between the layered tooth grooves and the inner side walls of the auxiliary material rods. The sheet feeding system further comprises a brush base and a brush which is in layering cooperation with the pre-layering trough. On the one hand, the sheets are driven to be stacked and staggered on the basis of airflow, so that the stacked sheets are bent downwards from the side edges to form pre-layering and then are cooperatively layered through a brush under horizontal dislocation, and the layering rate of the sheets is effectively increased; on the other hand, on the basis that the sheets are kept arched in the middle and layered on the side edges from pre-layering and ascend to the layering troughs step by step, the sheets can be kept mutually separated in the continuous jacking process, and accurate and rapid sheet-by-sheet taking is facilitated.

Description

Technical Field

[0001] The present invention belongs to the field of feeding equipment, and particularly relates to a sheet feeding system based on the arching separation in the middle of the sheet, and also relates to a sheet feeding process. Background Art

[0002] Currently, during the boxing process of the screen, it is usually necessary to place separator paper between every two adjacent screens to form protection.

[0003] However, in the feeding mechanism for paper-like materials, in order to solve the problem of adhesion between papers due to static electricity during material taking, so as to achieve the separation of papers from each other and enable piece-by-piece feeding, there is a Chinese patent with the publication number CN222729052U. The disclosed pre-separation mechanism adopts a conductive brush and a blowing device. The bristles of the conductive brush are made of conductive fibers. During the process of material taking and placing, the bristles of the conductive brush contact the side edge of the kraft paper. The side of the blowing device facing the kraft paper has a sawtooth structure, and a plurality of air outlets are arranged on the sawtooth structure. When the second sheet feeding bin jacks up the stacked kraft paper, or when the material taking mechanism moves upward after picking up the kraft paper, the side edge of the kraft paper contacts the conductive brush, thereby eliminating the influence of static electricity on the kraft paper. At the same time, air is blown through the air outlets on the sawtooth structure of the blowing device to layer the adjacent kraft papers, facilitating the pre-separation of the kraft papers and convenient for the material taking mechanism to pick up the kraft papers. The sawtooth structure is inclined, and when arranged oppositely, the distance between two by two is narrow at the top and wide at the bottom. The air outlets cooperate with the sawtooth structure, which can more effectively separate the adjacent kraft papers.

[0004] However, in the actual production process, the existing technology has the following defects: 1. When the horizontally stacked sheets are jacked up for feeding and enter the sawtooth structure, affected by factors such as the jacking rate or static electricity adsorption, it is easy to occur that adjacent sheets attract each other and get stuck in the same sawtooth groove of the sawtooth structure. And under the resistance of the side walls of the sawtooth groove against the side edges of multiple sheets, the separation difficulty between the sheets is further increased, resulting in a low layering rate. 2. As the sheets continue to be jacked up in the sawtooth structure, only the sides of the sheets can be layered, while the middle area of the sheets is still prone to adhesion, and it is easy to cause material taking failure or bring out the lower sheets when taking materials from the top layer. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an improved sheet feeding system based on the arching separation in the middle of the sheet.

[0006] At the same time, the present invention also provides a sheet feeding process.

[0007] To achieve the above purpose, the solution adopted by the present invention is: A sheet feeding system based on the arching and separation of the middle part of the sheet, which includes a material table, auxiliary material rods, and a lifting mechanism. There are multiple auxiliary material rods, and each auxiliary material rod is formed with a layering module. The layering module is formed with multiple layering grooves in the feeding direction of the material table. The inner side walls of each auxiliary material rod, each layering groove, and the top surface of the material table constitute a feeding area. Among them, the layering grooves of each layering module are located above the inner side of the corresponding inner side wall of the auxiliary material rod, and a pre-layering material groove is formed between the layering groove and the inner side wall of the auxiliary material rod; the sheet feeding system also includes a brush holder fixed to any one or two auxiliary material rods, a brush installed on the brush holder and forming a layering cooperation with the pre-layering material groove, and an air flow layering device arranged in the pre-layering material groove. The pre-layering material groove includes a dislocation area and a pre-deformation area. The air flow layering device is arranged in the dislocation area and drives the sheets to be stacked and dislocated based on the air flow. The brush extends from the brush holder into the feeding area, and its inner end is located above the inner side of the pre-deformation area. During the lifting of the lifting mechanism, the stacked sheets enter the dislocation area to form a horizontal dislocation in the length and / or width direction, and the sheets entering the pre-deformation area from the dislocation area are bent downward from the side to form a pre-layering. When feeding, as the material table continues to lift, the sheets move upward from the pre-layering and are cooperated layer by layer by the brush to keep the middle part of the sheet arched and the side edges layered into the layering grooves formed by each layer of layering grooves. It should be particularly noted that in this application, based on the gradual horizontal dislocation and the downward bending of the side edges of the stacked sheets in the pre-layering material groove to form a pre-layering, with the lifting and the cooperation of the brush for layering, the sheets enter each layer of layering grooves with the side edges as the reference and the middle part relatively arched, thereby realizing the separation from the adjacent sheets. And during the lifting, the sheets are forced to touch each other from the middle to achieve a step-by-step rise. And when entering the corresponding layering groove, the lifting stops (if necessary, it can be lowered slightly), then the middle part of the sheet loses force and separates from each other under the action of its own tension, and the sheet automatically maintains alignment and layering while keeping the middle part arched.

[0008] According to a specific implementation and preferred aspect of the present invention, each layering module forms a slope from the bottom, and the top of the inner side wall of each auxiliary material rod forms an inclined surface, where the inclined surface intersects with the slope to form the pre-layering material groove. Here, by setting the inclined surface to meet the space requirement for the downward deformation of the side edge of the sheet during contact.

[0009] Preferably, the plane where the inner side wall of each auxiliary material rod is located intersects with the slope and divides the slope into a downhill slope and an uphill slope. Among them, a plurality of downhill slopes and the inclined surface form the dislocation area, and the pre-deformation area that gradually narrows from bottom to top is formed between a plurality of uphill slopes. Here, it is ensured that all sheets can form a downward bending of the side edges when entering the pre-deformation area, so as to improve the success rate of forming a pre-layering.

[0010] Preferably, the slope is an arc-shaped surface that arches downward; the lower end of the slope intersects with the upper end of the inclined surface, and the upper end is aligned with the bottom of each layered tooth groove. Here, the side of the sheet is pressed down while reducing friction, so as to reduce the difficulty of the side of the sheet rising through the slope and reduce the probability of material jamming.

[0011] Preferably, the brush is horizontally extended into the upper material area. Here, as the sheet material continues to be lifted, the brush can be accurately inserted between each adjacent two side sheets in the horizontal direction.

[0012] According to another specific implementation and preferred aspect of the present invention, in the orthographic projection in the length direction of the stratified tooth groove, the lower surface of the brush is connected to the upper wall of the pre-stratified material groove, and the upper surface is connected to the groove bottom of the stratified tooth groove located at the lowest layer. During pre-stratification, the sheet material adheres to the lower surface of the brush from the side, and as the corresponding sheet material continues to rise upward, the brush folds upward to avoid it and then resets and inserts it between it and the adjacent sheet material. Here, each layer of sheet material maintains the same change trend on the side and the middle part to enter the stratified tooth groove of the lowest layer from the pre-stratified material groove, ensuring the stability and reliability of the pre-stratification.

[0013] According to another specific implementation and preferred aspect of the present invention, the plurality of auxiliary feed rods are divided into at least three feed rod groups, one of which is a reference feed rod group, and the other feed rod groups are movable feed rod groups, and each movable feed rod group is relatively closed or opened with respect to the reference feed rod group to match the size of the sheet. Here, the feeding of sheets of various specifications and styles is flexibly applicable, and the position accuracy of the sheets is improved.

[0014] Preferably, there are three rod groups; the feeding system also includes a reference fence, and the rectangular sheet abuts against the reference rod group and the reference fence from two adjacent sides, and against two movable rod groups from the other two adjacent sides; the brush seat is fixedly connected to the reference rod group. Based on the rectangular profile of the sheet, with the two adjacent sides as the reference, by abutting or releasing the other two adjacent sides, fast and accurate positioning is achieved to improve feeding efficiency.

[0015] Specifically, an avoidance groove and two guide groove groups extending along the length directions of the adjacent two sides of the sheet are formed on the material table, wherein the reference material rod group passes through the material table upward from the avoidance groove, and the two movable material rod groups pass through the material table upward from the corresponding guide groove groups and are arranged to reciprocate along the corresponding guide groove groups.

[0016] Preferably, an auxiliary brush is fixedly provided on the reference fence, wherein the auxiliary brush extends into the upper material area and the inner end thereof is located above the outer side of the adjacent layering module. Here, after taking the material from the top layering tooth groove, the auxiliary brush forms a resistance against the side edge of the taken sheet again, so as to further reduce the probability of the sheet sticking.

[0017] According to another specific implementation and preferred aspect of the present invention, the air flow stratifier blows static eliminating air flow on one side of the misalignment area close to or away from the brush. Here, it is ensured that the sheet forms a misalignment from the side close to the brush to facilitate the brush to cooperate in stratification; at the same time, the static electricity on the surface of the sheet is eliminated based on the air flow, further preventing the sheets from sticking.

[0018] Preferably, the air flow stratifier includes air flow nozzles distributed on one side or opposite sides of the misalignment area, and the air flow nozzles can be adjusted and set in the vertical direction and the horizontal direction. Here, it is convenient to arbitrarily adjust the air flow direction according to the actual working conditions, with strong flexibility.

[0019] Another technical solution of the present invention is a sheet loading process, which adopts the above-mentioned sheet loading system based on the arching separation in the middle of the sheet, and includes the following steps: S1. Stack the sheets on the loading table, and keep the sides of the sheets against the inner walls of the respective auxiliary rods to form positioning. S2. First, the lifting mechanism lifts the loading table upward and drives the sheets to move upward along the inner walls of the respective auxiliary rods to the pre-stratification trough. Among them, based on the air flow, the sheets are driven to be misaligned in layers, so that the stacked sheets enter the misalignment area of the pre-stratification trough to form a horizontal misalignment in the length and / or width direction, and the sheets entering the pre-deformation area of the pre-stratification trough from the misalignment area of the pre-stratification trough are bent downward from the side to form pre-stratification; then keep the loading table lifted continuously, and the sheets move upward from the pre-stratification and are cooperated by the brush layer by layer to keep the middle of the sheets arched, the sides stratified, and rise step by step into the stratification trough composed of each layer of stratification teeth grooves. S3. Adsorb and transfer each sheet one by one by the manipulator from the position where the middle of the sheet in the uppermost stratification trough is arched.

[0020] Due to the application of the above technical and equipment solutions, the present invention has the following advantages compared with the prior art: When the prior art stacks and lifts sheets and passes them through a serrated structure, affected by factors such as the lifting rate or electrostatic adsorption, it is easy for adjacent sheets to attract each other and get stuck in the same serration groove of the serrated structure. Moreover, under the resistance of the side walls of the serration groove against the sides of multiple sheets, the difficulty of separating the sheets is further increased, resulting in a low delamination rate. At the same time, as the sheets continue to be lifted in the serrated structure, only the sides of the sheets can be delaminated, while the middle area of the sheets is still prone to adhesion, which easily leads to picking failure or bringing out the lower sheets when picking from the top layer. However, the present application conducts an overall design on the structure of the sheet loading system based on the arching separation of the middle part of the sheet, skillfully solving the deficiencies and defects of the prior art. After adopting this sheet loading system, first, stack the sheets on the material table, and keep the sides of the sheets against the inner walls of the auxiliary material rods to form positioning. Secondly, the lifting mechanism lifts the material table upward and drives the sheets to move upward along the inner walls of the auxiliary material rods to the pre-delamination trough. Based on the airflow, the sheets are driven to be stacked and misaligned, so that the stacked sheets enter the misalignment area of the pre-delamination trough to form a horizontal misalignment in the length and / or width direction, and the sheets entering the pre-deformation area of the pre-delamination trough from the misalignment area of the pre-delamination trough bend downward from the sides to form pre-delamination. Then, keep the material table continuously lifted upward, and the sheets rise upward from the pre-delamination and are cooperated by the brush layer by layer to keep the middle part of the sheets arched, the sides delaminated, and rise step by step into the delamination trough composed of each layer of delamination teeth grooves. Finally, the manipulator adsorbs and transfers the sheets one by one from the delamination trough located at the top layer for loading. Therefore, compared with the prior art, on the one hand, based on the airflow, the sheets are driven to be stacked and misaligned, so as to keep the stacked sheets form a horizontal misalignment and then bend downward from the sides to form pre-delamination and be delaminated by the cooperation of the brush, reducing the probability of adjacent sheets sticking together and entering the delamination teeth grooves, and effectively improving the delamination rate of the sheets. On the other hand, based on the sheets keeping the middle part arched, the sides delaminated and rising step by step into each delamination trough from the pre-delamination, it is not only beneficial to keep the sheets separated from each other during continuous lifting, but also convenient for accurate and rapid picking of sheets one by one. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional structural schematic diagram of the sheet loading system based on the arching separation of the middle part of the sheet in this embodiment; Figure 2 is a front view schematic diagram of the sheet loading system based on the arching separation of the middle part of the sheet in this embodiment; Figure 3 is Figure 2 a top view schematic diagram of; Figure 4 is Figure 2 a partial enlarged structural schematic diagram of; Figure 5 is a schematic diagram of the process of the sheet entering the pre-delamination trough; Wherein: 1. Material platform; c0. Avoidance groove; c1. Guide groove group; 2. Auxiliary material rod; d. Linear motion driving mechanism; 20. Layering module; c2. Layering tooth groove; c3. Pre-layering material groove; c30. Dislocation area; c31. Pre-deformation area; m1. Slope surface; m2. Inclined surface; q. Loading area; 3. Lifting mechanism; 4. Brush seat; 5. Brush; 6. Reference fence; 60. Auxiliary brush; 7. Airflow layering device; 70. Airflow nozzle. Specific embodiments

[0022] To make the above objects, features, and advantages of the present application more apparent and understandable, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0024] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0025] In the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0026] In this application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the 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, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the horizontal height of the first feature is less than that of the second feature. It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0027] As Figures 1 to 5 shown, the sheet loading system based on the arching separation in the middle of the sheet of this embodiment includes a material table 1, an auxiliary material rod 2, a lifting mechanism 3, a brush seat 4 and a brush 5.

[0028] Specifically, the sheet of this embodiment is a rectangular sheet and is horizontally stacked on the material table 1; there are multiple auxiliary material rods 2, and the multiple auxiliary material rods 2 are divided into three material rod groups, and one of the three material rod groups is a reference material rod group corresponding to one side edge of the sheet, and the other two material rod groups are movable material rod groups corresponding to the adjacent two side edges of the sheet. The two movable material rod groups are relatively closed or opened with the reference material rod group as the reference to match the size of the sheet. That is to say, the reference material rod group includes two auxiliary material rods 2 spaced along one short side of the sheet, and one of the two movable material rod groups includes three auxiliary material rods 2 spaced along one long side of the sheet, and the other includes two auxiliary material rods 2 spaced along the other short side of the sheet.

[0029] An avoidance groove c0 is formed on the material table 1, and two guide groove groups c1 respectively extending along the length directions of the adjacent two side edges of the sheet. The reference material rod group passes through the material table 1 upward from the avoidance groove c0, and the two movable material rod groups respectively pass through the corresponding guide groove groups c1 upward and are reciprocatingly arranged along the corresponding guide groove groups c1. A linear motion driving mechanism d is respectively connected to the bottom of each movable material rod group, which is a conventional technology and will not be elaborated here.

[0030] In this example, a stratification module 20 is formed on each auxiliary material rod 2, and the stratification module 20 is formed with a plurality of stratification grooves c2 constituting a sawtooth structure in the loading direction of the material platform 1, and the inner side walls of each auxiliary material rod 2, each stratification groove c2 and the top surface of the material platform 1 constitute a loading area q, wherein the stratification groove c2 of each stratification module 20 is located above the inner side of the inner side wall of the corresponding auxiliary material rod 2, and a pre-stratification trough c3 is formed between the stratification groove c2 and the inner side wall of the auxiliary material rod 2, and the pre-stratification trough c3 includes a dislocation area c30 and a pre-deformation area c31, and during the jacking by the jacking mechanism 3, the stacked sheets enter the dislocation area c30 to form horizontal dislocation in the length and / or width direction, and the sheets entering the pre-deformation area c31 from the dislocation area c30 bend downward from the side to form a pre-stratification.

[0031] In some specific embodiments, each layering module 20 forms a slope m1 from the bottom, and the top of the inner side wall of each auxiliary material rod 2 forms a slope m2 whose extension direction intersects with the corresponding slope m1, wherein the slopes intersect with the slopes to form a pre-layering trough c3. Here, the inclined surface is provided to meet the space requirement for the side of the sheet to be pressed down and deformed in the collision.

[0032] For the convenience of implementation, the plane where the inner wall of each auxiliary material rod 2 is located intersects with the slope m1 and divides the slope into a downslope and an upslope, wherein a plurality of downslopes and the inclined surface m2 form a dislocation zone c30, and a plurality of upslopes form a pre-deformation zone c31 that gradually narrows from bottom to top. Here, it is ensured that all sheets can form a side downward bending when entering the pre-deformation zone to improve the success rate of forming pre-layers.

[0033] At the same time, the slope surface m1 is an arc-shaped surface that arches downward; the lower end of the slope surface intersects with the upper end of the inclined surface m2, and the upper end is aligned with the bottom of each layered tooth groove c2. Here, the side of the sheet is pressed down while reducing friction, so as to reduce the difficulty of the side of the sheet to rise through the slope and reduce the probability of material jamming.

[0034] In this example, the lifting mechanism 3 adopts screw transmission.

[0035] In this example, the brush holder 4 is fixed between the two auxiliary material rods 2 in the reference material rod group, and the brush 5 is installed on the brush holder 4 and forms a layered coordination with the pre-layered material trough c3, wherein the brush 5 extends from the brush holder 4 to the upper material area q and the inner end is located above the inner side of the pre-layered material trough c3. During the lifting of the lifting mechanism 3, the sheet entering the pre-deformation area from the dislocation area is bent downward from the short side to form a pre-layered layer, and as the material table 1 continues to lift, the sheet upward from the pre-layered layer and the brush 5 cooperates layer by layer to keep the middle part arched and the side part layered into the layered material trough formed by the layered tooth grooves c2 of each layer. In short, the sheet in the pre-layered material trough keeps the middle part fitted and the side parts bent downward and staggered; while the sheet in the layered material trough keeps the same arched shape and is arranged in layers in sequence.

[0036] In some specific embodiments, the brush 5 extends horizontally into the loading area q. Here, as the sheet is continuously lifted, the brush can accurately insert between every two adjacent side sheets in the horizontal direction.

[0037] Meanwhile, in the orthographic projection in the length direction of the layered tooth groove c2, the lower surface of the brush 5 is connected to the upper wall of the pre-layered material groove c3, and the upper surface is connected to the bottom of the layered tooth groove c2 at the lowermost layer. The pre-layered sheets are attached to the lower surface of the brush 5 from the side, and as the corresponding sheets continue to be lifted upward, the brush 5 folds upward to avoid and then resets and inserts between it and the adjacent sheet. Here, each layer of sheet maintains the same change trend on the side and in the middle and enters the layered tooth groove at the lowermost layer from the pre-layered material groove, ensuring the stability and reliability of pre-layered.

[0038] For the convenience of implementation, the loading system further includes a reference abutting grid 6 corresponding to the other long side of the sheet. The rectangular sheet abuts against the reference material rod group and the reference abutting grid 6 from the adjacent short side and long side, and abuts against the two movable material rod groups from the other adjacent short side and long side; the brush holder 4 is fixedly connected to the reference material rod group. Based on the rectangular contour of the sheet, with two adjacent sides as the reference, by abutting or releasing the other two adjacent sides, rapid and accurate positioning is achieved, improving the loading efficiency.

[0039] Meanwhile, an auxiliary brush 60 extending along the long side direction of the sheet is also fixedly provided on the reference abutting grid 6. The auxiliary brush 60 extends into the loading area q, and its inner end is located above the outside of the adjacent layering module 20, and the inner end of the auxiliary brush 60 is located on the moving path of the sheet after material taking. Here, after taking the sheet from the top-layered tooth groove, the side of the taken sheet is further abutted by the auxiliary brush to further reduce the probability of sheet adhesion.

[0040] In addition, the loading system of this embodiment further includes an air flow layering device 7 arranged in the pre-layered material groove c3. The air flow layering device 7 is arranged in the dislocation area c30 and drives the sheets to be stacked and dislocated based on the air flow. It should be noted that when purging with air flow, the horizontal dislocation formed by the sheets is random, that is, it only needs the sheets to form a dislocation and enter the pre-deformation area based on the dislocation to form pre-layered.

[0041] In some specific embodiments, the air flow layering device 7 blows static electricity removing air flow on the side close to or far from the brush 5 in the dislocation area c30. Here, it is ensured that the sheets form a dislocation from the side close to the brush to facilitate the brush to cooperate in layering; meanwhile, the static electricity on the surface of the sheets is eliminated based on the air flow, further preventing the sheets from adhering.

[0042] Preferably, the airflow layering device 7 includes airflow nozzles 70 distributed on one side or two opposite sides of the dislocation area (or airflow nozzles can be provided on both sides to increase the probability of sheet dislocation), wherein the airflow nozzles 70 can be adjusted in the vertical direction and the horizontal direction. Here, it is convenient to adjust the airflow direction arbitrarily according to the actual working conditions, and the flexibility is strong.

[0043] Therefore, the sheet material loading process of this embodiment includes the following steps: S1, stacking the sheets on the material table, and keeping the side edges of the sheets against the inner side walls of each auxiliary material rod to form a positioning; S2, firstly, the lifting mechanism lifts the material table upward and drives the sheet to move upward along the inner side wall of each auxiliary material rod to the pre-layered material trough, wherein the sheet is stacked and dislocated based on the airflow, so that the stacked sheets enter the dislocation area of ​​the pre-layered material trough to form horizontal dislocation in length and / or width direction, and the sheets entering the pre-deformation area of ​​the pre-layered material trough from the dislocation area of ​​the pre-layered material trough are bent downward from the side to form pre-layered layers; then, the material table is kept lifted upward continuously, and the sheets move upward from the pre-layered layers and are layered on the sides in coordination with the brush layer by layer, so that the sheets keep the middle part arched, the sides layered, and rise step by step to the layered material trough formed by the layered tooth grooves of each layer; S3, the robot arm transfers the sheets one by one from the arched position in the middle of the sheet material in the uppermost layer trough.

[0044] In summary, after adopting this sheet material loading system, first, stack the sheet materials on the material table, and keep the side edges of the sheet materials against the inner side walls of the auxiliary material rods to form positioning; second, the lifting mechanism lifts the material table upward and drives the sheet materials to move upward along the inner side walls of the auxiliary material rods to the pre-stratification trough. Based on the airflow, the sheet materials are stacked and misaligned, so that the stacked sheet materials enter the misalignment area of the pre-stratification trough to form a horizontal misalignment in the length and / or width direction, and the sheet materials entering the pre-deformation area of the pre-stratification trough from the misalignment area of the pre-stratification trough are bent downward from the side edges to form pre-stratification; then keep the material table continuously lifted upward, and the sheet materials move upward from the pre-stratification and are cooperated by the brush layer by layer to keep the sheet materials arched in the middle, stratified at the side edges and gradually rise to the stratification trough composed of each layer of stratification teeth grooves; finally, the manipulator adsorbs and transfers the sheet materials one by one from the stratification trough at the topmost layer for loading. Therefore, compared with the prior art, on the one hand, based on the airflow, the sheet materials are stacked and misaligned, so as to keep the stacked sheet materials form a horizontal misalignment and then are bent downward from the side edges to form pre-stratification and then are stratified by the cooperation of the brush, reducing the probability of adjacent sheet materials sticking together and entering the stratification teeth grooves, and effectively improving the stratification rate of the sheet materials; on the other hand, based on the fact that the sheet materials are arched in the middle, stratified at the side edges and gradually rise to each stratification trough from the pre-stratification, it is not only beneficial to keep the sheet materials separated from each other during continuous lifting, but also convenient for accurately and quickly picking up the sheet materials one by one; on the third hand, based on the pre-stratification trough formed between the slope surface and the inclined surface, it is convenient to meet the space requirement of the side edge downward pressing deformation of the sheet material during contact; on the fourth hand, based on the arc-shaped wall surface of the pre-stratification trough, while realizing the downward pressing and contacting of the side edge of the sheet material, the friction is reduced to reduce the difficulty of the side edge of the sheet material rising through the slope surface and reduce the probability of material jamming; on the fifth hand, during the process of gradually lifting the sheet materials, ensure that all sheet materials can form downward pressing and bending of the side edges when entering the pre-deformation area, so as to improve the success rate of forming pre-stratification; on the sixth hand, based on the layout of the upper and lower surfaces of the brush and the upper wall of the pre-stratification trough and the bottom of the stratification teeth groove at the lowermost layer, each layer of sheet material keeps the same change trend of the side edge and the middle part and enters the stratification teeth groove at the lowermost layer from the pre-stratification trough, ensuring the stability and reliability of the pre-stratification; on the seventh hand, it is flexibly applicable to the feeding of sheet materials of multiple specifications and styles, and improves the position accuracy of the sheet materials; on the eighth hand, based on the rectangular contour of the sheet material, taking two adjacent side edges as the reference, by abutting or releasing the other two adjacent side edges, rapid and accurate positioning is realized, and the loading efficiency is improved; on the ninth hand, after picking up the sheet material from the topmost layer of stratification teeth groove, the side edge of the picked-up sheet material is further contacted by the auxiliary brush to further reduce the probability of sheet material sticking; on the tenth hand, ensure that the sheet materials are misaligned from the side close to the brush to facilitate the cooperation of the brush for stratification; at the same time, based on the airflow, the static electricity on the surface of the sheet materials is eliminated, further preventing the sheet materials from sticking together.

[0045] The above embodiments are only used to illustrate the technical concept and features of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It should not be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A sheet feeding system based on the separation of the middle part of the sheet, which comprises a material platform, an auxiliary material rod, and a lifting mechanism, wherein there are multiple auxiliary material rods, each of which is formed with a layered module, and the layered module is formed with multiple layered tooth grooves in the feeding direction of the material platform, characterized in that: The inner side wall of each auxiliary material rod, each layering tooth groove and the top surface of the material table constitute a loading area, wherein the layering tooth groove of each layering module is located above the inner side of the corresponding inner side wall of the auxiliary material rod, and a pre-layering material trough is formed between the layering tooth groove and the inner side wall of the auxiliary material rod; the sheet material loading system also includes a brush holder fixed to any one or two auxiliary material rods, a brush installed on the brush holder and forming a layered coordination with the pre-layering material trough, and an airflow layering device arranged in the pre-layering material trough, wherein the pre-layering material trough includes a dislocation area and a pre-deformation area, and the airflow layering device is arranged In the dislocation zone and based on the airflow driving the stacked sheets to be dislocated, the brush extends from the brush seat into the upper material zone and the inner end is located above the inner side of the pre-deformation zone. During the lifting of the lifting mechanism, the stacked sheets enter the dislocation zone to form horizontal dislocation in length and / or width direction, and the sheets entering the pre-deformation zone from the dislocation zone are bent downward from the side to form pre-layers. During loading, with the continuous lifting of the material table, the sheets are moved upward from the pre-layer and the brush cooperates layer by layer to keep the middle arched and the sides layered into the layered material trough formed by the layered tooth grooves of each layer.

2. The sheet feeding system based on sheet middle arch separation according to claim 1 is characterized in that: Each stratification module forms a slope from the bottom, and the inner side wall top of each auxiliary material rod forms an inclined surface, wherein the inclined surface intersects with the slope to form the pre-stratification material trough.

3. The sheet feeding system based on sheet middle arch separation according to claim 2 is characterized in that: The plane where the inner wall of each auxiliary material rod is located intersects with the slope surface and divides the slope surface into a downslope surface and an upslope surface, wherein the dislocation area is formed between multiple downslope surfaces and the inclined surface, and a pre-deformation area that gradually narrows from bottom to top is formed between multiple upslope surfaces.

4. The sheet feeding system based on separation by arching in the middle of the sheet according to claim 2 or 3, characterized in that: The slope surface is an arc-shaped surface that arches downward; the lower end of the slope surface intersects with the upper end of the inclined surface, and the upper end is vertically aligned with the groove bottom of each layered tooth groove.

5. The sheet feeding system based on sheet middle arch separation according to claim 1, characterized in that: The brush is horizontally extended into the feeding area.

6. The sheet feeding system based on sheet middle arch separation according to claim 1, characterized in that: In the orthographic projection in the length direction of the stratified tooth groove, the lower surface of the brush is connected to the upper wall of the pre-stratified material groove, and the upper surface is connected to the bottom of the stratified tooth groove located at the lowest layer. The sheet adheres to the lower surface of the brush from the pre-stratification, and as the corresponding sheet continues to rise, the brush folds upward to avoid it and then returns to its original position and is inserted between it and the adjacent sheet.

7. The sheet feeding system based on sheet middle arch separation according to claim 1 is characterized in that: The plurality of auxiliary feed rods are divided into at least three feed rod groups, one of which is a reference feed rod group, and the other feed rod groups are movable feed rod groups. Each movable feed rod group is relatively retracted or opened with respect to the reference feed rod group to match the size of the sheet.

8. The sheet feeding system based on sheet middle arch separation according to claim 7 is characterized in that: There are three material rod groups; the feeding system also includes a reference guardrail, and the rectangular sheet abuts against the reference material rod group and the reference guardrail from two adjacent side edges, and abuts against two movable material rod groups from other adjacent side edges; the brush seat is fixedly connected to the reference material rod group.

9. The sheet feeding system based on separation by arching in the middle of the sheet according to claim 8, characterized in that: The material table is formed with an avoidance groove and two guide groove groups extending along the length directions of the adjacent two sides of the sheet, wherein the reference material rod group passes through the material table upward from the avoidance groove, and the two movable material rod groups pass through the material table upward from the corresponding guide groove groups respectively and are arranged to reciprocate along the corresponding guide groove groups.

10. The sheet feeding system based on separation by arching in the middle of the sheet according to claim 8, characterized in that: An auxiliary brush is also fixedly provided on the reference fence, wherein the auxiliary brush extends into the upper material area and the inner end portion is located above the outer side of the adjacent layered module.

11. The sheet feeding system based on sheet middle arch separation according to claim 1, characterized in that: The air flow stratifier blows a static-eliminating air flow on a side of the offset zone close to or far from the brush.

12. The sheet feeding system based on sheet middle arch separation according to claim 1, characterized in that: The air flow demultiplexer comprises air flow nozzles distributed on one side or two opposite sides of the offset zone, wherein the air flow nozzles can be adjusted in the vertical direction and the horizontal direction.

13. A sheet material feeding process, characterized in that: The sheet feeding system based on the sheet middle arch separation described in any one of claims 1 to 12 is adopted, and comprises the following steps: S1, stacking the sheets on the material table, and keeping the side edges of the sheets against the inner side walls of each auxiliary material rod to form a positioning; S2, firstly, the lifting mechanism lifts the material table upward and drives the sheet to move upward along the inner side wall of each auxiliary material rod to the pre-layered material trough, wherein the sheet is stacked and dislocated based on the airflow, so that the stacked sheets enter the dislocation area of ​​the pre-layered material trough to form horizontal dislocation in length and / or width direction, and the sheets entering the pre-deformation area of ​​the pre-layered material trough from the dislocation area of ​​the pre-layered material trough are bent downward from the side to form pre-layered layers; then, the material table is kept lifted upward continuously, and the sheets move upward from the pre-layered layers and are layered on the sides in coordination with the brush layer by layer, so that the sheets keep the middle part arched, the sides layered, and rise step by step to the layered material trough formed by the layered tooth grooves of each layer; S3. The robot arm absorbs and transfers the materials piece by piece from the raised position in the middle of the sheet in the uppermost layered trough.

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