Automatic sorting device and method for printing press

Abstract

The present invention provides an automatic sorting device and method for a printing press, comprising: a size screening unit; a light and heavy screening unit, the light and heavy screening unit being arranged on the side of the size screening unit; and a classification unit, the classification unit being arranged at the discharge end of the light and heavy screening unit; the light and heavy screening unit comprising: a light screening component; a heavy screening component, the heavy screening component being arranged at the bottom of the light screening component; and a lifting component, the lifting component being arranged at the discharge end of the light screening component. The present invention, through the coordination of the light screening component, the heavy screening component and the lifting component, pushes the material box to different paths for subsequent screening according to the weight of the material box, thereby achieving the effect of automatically screening the weight of the material box, and being able to divide the material box into two paths for transmission according to the weight of the material box, and accurately screening.

Description

Technical Field

[0001] The present invention relates to the technical field of printing sorting, and in particular to an automatic sorting device and method for a printing press. Background Art

[0002] A printing press is a machine for printing text and images. Modern printing presses are generally composed of mechanisms such as plate mounting, inking, embossing, and paper feeding. Its working principle is to first make the text and image to be printed into a printing plate, install it on the printing press, and then apply ink to the areas with text and images on the printing plate manually or by the printing press, and then transfer it directly or indirectly to paper or other printing materials, such as textiles, metal plates, plastics, leather, wood boards, glass and ceramics, so as to reproduce printed products identical to the printing plate. The invention and development of the printing press plays an important role in the dissemination of culture. Existing printing presses cannot sort the specifications and sizes of printed cardboards during the printing process.

[0003] After the boxes of products of different specifications are packed and exported according to customer needs, they need to be inspected and printed uniformly after passing the review. However, there are the following defects in actual operation:

[0004] 1. This solution cannot automatically screen the material boxes according to their size and weight, resulting in poor screening effect.

[0005] 2. This solution cannot unload light and heavy material boxes separately. Instead, light and heavy material boxes of different weights are dropped into the collection box at the same time. This may cause the light material box that drops into the material box first to be crushed by the heavy material box that drops in later. Summary of the Invention

[0006] The purpose of the present invention is to address the shortcomings of the existing technology and provide an automatic sorting device for a printing machine. The device first screens the material boxes by size and sends the material boxes of similar sizes after each screening level into the light and heavy screening area to prevent material boxes of different sizes from interfering with the screening of material boxes of different weights. The weight of the material boxes is then automatically screened, and the material boxes can be divided into two paths for transmission according to their weight. The screening is accurate and effectively prevents heavy material boxes from being stacked together during the subsequent unloading process, causing the material boxes at the bottom of the collection box to be crushed.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] Automatic sorting device for printing press, including:

[0009] size screening unit;

[0010] a light / heavy screening unit, the light / heavy screening unit being arranged on the side of the size screening unit; and

[0011] A classification unit, the classification unit being arranged at the discharge end of the light and heavy screening unit;

[0012] The light and heavy screening unit comprises:

[0013] Light screening components;

[0014] a heavy screening assembly, the heavy screening assembly being disposed below the light screening assembly; and

[0015] A lifting assembly, the lifting assembly being arranged at the discharge end of the light screening assembly;

[0016] After the material boxes are screened by size at the size screening unit, material boxes of similar sizes fall onto the lifting component in turn after passing through the light screening component. The lifting component automatically selects the light screening component and the heavy screening component according to the weight of the material boxes to perform light and heavy classification and enter the classification unit along two different paths. The classification unit uses different unloading methods for light and heavy material boxes to unload them.

[0017] As an improvement, the size screening unit includes: a frame;

[0018] a first conveyor belt, the first conveyor belt being rotatably connected to the upper portion of the frame;

[0019] A high guide plate and a low guide plate are sequentially provided on the upper part of the frame along the conveying direction of the first conveyor belt.

[0020] As an improvement, the light screening assembly includes:

[0021] load-bearing cabinet;

[0022] a first blanking plate connected to a side of the load-bearing cabinet;

[0023] a first push plate, the first push plate being slidably inserted into the interior of the load-bearing cabinet;

[0024] One end of the first push plate is inserted into the lifting assembly;

[0025] The first blanking plate is placed at an angle;

[0026] The upper portion of the carrying cabinet is rotatably connected to a second conveyor belt.

[0027] As an improvement, the side portion of the load-bearing cabinet is rotatably connected to a first transfer shaft and a second transfer shaft in sequence along the same horizontal plane;

[0028] A first driving mechanism is rotatably connected to the side of the load-bearing cabinet and is located on the same vertical axis as the second adapter shaft;

[0029] The second conveyor belt is rotatably connected to the outside of the first transfer shaft via the first belt;

[0030] The first transfer shaft is rotatably connected to the outer side of the second transfer shaft via a third conveyor belt;

[0031] The second transfer shaft is rotatably connected to the driving end of the first driving mechanism via a second belt;

[0032] A fourth conveyor belt is sleeved on the outer side of the first driving mechanism and is used to convey the material boxes screened by the light screening assembly to the classification unit.

[0033] As an improvement, the re-screening component includes:

[0034] Frame;

[0035] a first wedge-shaped plate, the first wedge-shaped plate being slidably inserted into the sleeve frame;

[0036] a second push plate connected to a side portion of the first wedge-shaped plate for pushing out a weight on the lifting assembly;

[0037] a second drive mechanism connected to a side of the light screening assembly;

[0038] A propulsion mechanism is connected to one end of the second driving mechanism.

[0039] As an improvement, the propulsion mechanism is connected to a propulsion block on one side of the first wedge-shaped plate;

[0040] The side of the propulsion block is connected to a second wedge plate;

[0041] The inclined surface of the second wedge plate is rotatably connected to a guide wheel in contact with the first wedge plate.

[0042] As an improvement, the lifting assembly includes:

[0043] Lifting platform;

[0044] A second blanking plate, used for rotating the light material box out of the lifting platform, is rotatably connected to the discharge end of the lifting platform;

[0045] The interior of the lifting platform is provided with a horizontal guide rail and a longitudinal guide rail in sequence;

[0046] A second guide groove is provided inside the lifting platform;

[0047] A lifting block is slidably inserted into the second guide groove;

[0048] A preload spring is connected to the upper end of the lifting block and located inside the second guide groove;

[0049] The side of the lifting block is configured as an inclined surface;

[0050] A sleeve plate is provided on the lower outer side of the lifting platform;

[0051] A thrust spring is connected inside the sleeve and at the lower end of the lifting platform;

[0052] The lower end of the lifting block contacts the third blanking plate connected to the side of the sleeve plate.

[0053] As an improvement, the classification unit includes:

[0054] Lightly classified components;

[0055] A heavy classification component, wherein the heavy classification component and the light classification component form a continuous circulating track;

[0056] The light classification assembly includes: a conveyor frame;

[0057] A first collecting box for collecting the classified light material boxes is arranged on the side of the conveying frame;

[0058] The upper end of the conveyor frame is slidably connected to a transfer belt;

[0059] A first baffle is installed on the upper portion of the conveying frame and at the terminal end where the first collecting boxes are arranged.

[0060] As an improvement, the reclassification component includes:

[0061] Second collection box;

[0062] The second collecting box for collecting the classified heavy material boxes is connected to the transfer belt via a sliding plate;

[0063] A propulsion groove is provided inside the sliding plate;

[0064] The lower end of the conveyor frame is connected to a third driving mechanism;

[0065] A third push plate having a size matching that of the propulsion slot is provided on the side of the third driving mechanism.

[0066] Another object of the present invention is to address the deficiencies of the prior art and provide an automatic sorting method for a printing press, comprising the following steps:

[0067] Step 1: Size screening process: The material boxes are sequentially conveyed by the first conveyor belt through the high guide plate and the low guide plate to screen the material boxes by size, so that the material boxes of similar sizes enter the corresponding second conveyor belt and are transported to the lifting platform in sequence;

[0068] Step 2: Light and heavy material selection process: The lifting platform detects the weight of the material box. For light material boxes, the first push plate pushes them to the second unloading plate and then sends them to the transfer belt via the fourth conveyor belt. For heavy material boxes, the second push plate pushes them to the third unloading plate and finally sends them to the transfer belt via the third conveyor belt.

[0069] Step 3: Classification process: Classify the transfer belt according to different types of material boxes;

[0070] Step 4: Unloading process: For light material boxes, they fall directly into the first collection box. For heavy material boxes, they first slide along the sliding plate to the initial end of the second collection box, and then are pushed to the end of the second collection box by the third push plate.

[0071] The beneficial effects of the present invention are:

[0072] (1) The present invention uses a first conveyor belt to first bring the material box to the high guide plate, so that the material box that is higher or wider than the high guide plate is introduced into the second conveyor belt by the inclined high guide plate for subsequent light and heavy screening process, and the material box on the first high guide plate enters the low guide plate for secondary screening, thereby achieving the goal of first screening the material boxes by size and then sending the material boxes of similar sizes after each level of screening into the light and heavy screening area, preventing material boxes of different sizes from interfering with the light and heavy screening process.

[0073] (2) The present invention cooperates with a light screening component, a heavy screening component and a lifting component to push the material box to different paths for subsequent screening according to the weight of the material box, thereby achieving the effect of automatically screening the weight of the material box, dividing the material box into two paths for transmission according to the weight of the material box, and accurately screening.

[0074] (3) The present invention inserts the second push plate into the inside of the first push plate. The second push plate is always pressed against the third blanking plate under the action of the preload spring. When the heavy material box is on the lifting platform, the lifting platform compresses the thrust spring and moves downward, and the lifting block moves upward along the second guide groove lifting platform, so that the heavy material box can pass through the lifting block for transition before falling into the third blanking plate, thereby preventing the heavy material box from being broken.

[0075] (4) The present invention achieves the following conditions: when the heavy material box is pushed into the second collection box, the heavy material box first passes through the slide plate and then passes through the transfer belt obliquely downward to the second collection box. Then, the third drive is activated and pushes the medium material box through the push groove through the third push plate to the second collection groove away from the slide plate. This achieves the separation of the light material box from the heavy material box while preventing the heavy material boxes from being stacked together during the unloading process, causing the material box at the bottom of the collection box to be crushed.

[0076] (5) The present invention effectively reduces the floor space by using only one transfer belt to work during the sorting process of light material boxes and heavy material boxes.

[0077] (6) The present invention pre-screens material boxes of different sizes and then screens the material boxes by weight, thereby preventing the second push plate and the first push plate from pushing the material box at the same time and causing interference during the weight screening of the material box which is larger in size and heavier in weight on the lifting platform.

[0078] In summary, the present invention has the advantages of good screening effect and the ability to automatically screen material boxes according to their size and weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0080] Figure 2 This is a diagram showing the coordination relationship between the size screening unit and the light / heavy screening unit of the present invention;

[0081] Figure 3 This is a diagram showing the coordination relationship between the light screening component and the heavy screening component of the present invention;

[0082] Figure 4 This is a diagram showing the coordination relationship between the lifting assembly and the re-screening assembly of the present invention;

[0083] Figure 5 This is a structural schematic diagram of the lifting platform of the present invention after sinking after carrying a heavy object;

[0084] Figure 6 This is a schematic diagram of the internal structure of the lifting platform of the present invention;

[0085] Figure 7 This is a diagram showing the coordination relationship between the lifting block and the third blanking plate of the present invention;

[0086] Figure 8 A diagram showing the coordination relationship between the light classification component and the heavy classification component of the present invention;

[0087] Figure 9 A diagram showing the coordination relationship between the second collecting trough and the sliding plate of the present invention;

[0088] Figure 10 This is a diagram showing the coordination relationship between the third push plate and the push groove of the present invention;

[0089] Figure 11 It is a process flow chart of the present invention.

[0090] In the figure, 1, size screening unit; 2, light and heavy screening unit; 3, classification unit; 101, frame; 102, first conveyor belt; 1011, high guide plate; 1012, low guide plate; 21, light screening component; 22, heavy screening component; 23, lifting component; 211, carrying cabinet; 2111, second conveyor belt; 2112, first belt; 2113, first transfer shaft; 2114, third conveyor belt; 2115, second transfer shaft; 21151, transfer plate; 2116, second belt; 2117, first driving mechanism; 2118, fourth conveyor belt; 212, first blanking plate; 2121, first guide groove; 213, first push plate; 2131, guide rail; 221, sleeve frame; 2211, guide sleeve; 222, first wedge plate; 223, second Push plate; 224, second driving mechanism; 225, pushing mechanism; 2251, pushing block; 22511, second wedge plate; 22512, guide wheel; 2252, pushing plate; 231, lifting platform; 232, second blanking plate; 233, lifting block; 234, third blanking plate; 235, sleeve plate; 236, thrust spring; 2311, longitudinal guide rail; 2312, transverse guide rail; 2313, second guide groove; 2314, preload spring; 31, light classification component; 32, heavy classification component; 310, conveying rack; 3101, transfer belt; 3102, driving tooth; 311, first collection box; 312, first baffle plate; 321, second collection box; 322, sliding plate; 3221, pushing groove; 323, third driving mechanism; 324, third pushing plate. DETAILED DESCRIPTION

[0091] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0092] 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" and the like to indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot 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 one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0093] Example 1

[0094] like Figure 1-2 As shown, this embodiment provides an automatic sorting device for a printing press, comprising:

[0095] Size screening unit 1;

[0096] A light / heavy screening unit 2, which is disposed on the side of the size screening unit 1; and

[0097] A classification unit 3, which is provided at the discharge end of the light and heavy screening unit 2;

[0098] The light and heavy screening unit 2 includes:

[0099] Light screening component 21;

[0100] A heavy screening component 22, the heavy screening component 22 is provided at the lower portion of the light screening component 21; and

[0101] A lifting assembly 23, the lifting assembly 23 is provided at the discharge end of the light screening assembly 21;

[0102] After the material boxes are size-screened at the size screening unit 1, material boxes of similar sizes pass through the light screening component 21 and fall onto the lifting component 23 in sequence. The lifting component 23 automatically selects the light screening component 21 and the heavy screening component 22 according to the weight of the material boxes to perform light and heavy classification and enter the classification unit 3 along two different paths. The classification unit 3 uses different unloading methods for light and heavy material boxes to unload them.

[0103] As an improvement, Figure 1-2As shown, the size screening unit 1 includes: a frame 101;

[0104] A first conveyor belt 102 rotatably connected to an upper portion of the frame 101 ;

[0105] A driving motor is installed inside the first conveyor belt 102;

[0106] A high guide plate 1011 and a low guide plate 1012 are sequentially provided on the upper portion of the frame 101 along the conveying direction of the first conveyor belt 102 .

[0107] As an improvement, Figure 1-2 As shown, Figure 3-5 As shown, the light screening component 21 includes:

[0108] Carrier cabinet 211;

[0109] A first blanking plate 212 , the first blanking plate 212 being connected to a side of the carrying cabinet 211 ;

[0110] The upper end of the first blanking plate 212 is provided with a first guide groove 2121;

[0111] A first push plate 213 , which is slidably inserted into the carrying cabinet 211 ;

[0112] One end of the first push plate 213 is inserted into the lifting assembly 23;

[0113] The first blanking plate 212 is placed at an angle;

[0114] The upper portion of the carrying cabinet 211 is rotatably connected to a second conveyor belt 2111 .

[0115] Furthermore, the side of the carrying cabinet 211 is rotatably connected to a first transfer shaft 2113 and a second transfer shaft 2115 in sequence along the same horizontal plane;

[0116] A first driving mechanism 2117 is rotatably connected to the side of the carrier cabinet 211 and is located on the same vertical axis as the second adapter shaft 2115 ;

[0117] The first driving mechanism 2117 preferably adopts a motor;

[0118] The second conveyor belt 2111 is rotatably connected to the outside of the first transfer shaft 2113 via the first belt 2112;

[0119] The first transfer shaft 2113 is rotatably connected to the outer side of the second transfer shaft 2115 via the third conveyor belt 2114;

[0120] The second transfer shaft 2115 is rotatably connected to the driving end of the first driving mechanism 2117 via a second belt 2116;

[0121] The second transfer shaft 2115 and the conveying frame 310 are transitionally connected via a transfer plate 21151;

[0122] A fourth conveyor belt 2118 is provided on the outside of the first driving mechanism 2117 for conveying the material boxes screened by the light screening assembly 21 to the classification unit 3 .

[0123] As an improvement, Figure 3-6 As shown, the re-screening component 22 includes:

[0124] Frame 221;

[0125] A first wedge plate 222 slidably inserted into the sleeve frame 221 ;

[0126] A second push plate 223 for pushing out the weight on the lifting assembly 23 is connected to the side of the first wedge plate 222;

[0127] It should be noted that a return spring is installed between the first wedge plate 222 and the sleeve frame 221 to ensure that when the guide wheel 22512 is separated from the first wedge plate 222, the first wedge plate 222 can automatically drive the second push plate 223 to return to its original position under the action of the return spring. The return spring is not shown in the figure.

[0128] A second driving mechanism 224, the second driving mechanism 224 is connected to the side of the light screening assembly 21;

[0129] a propulsion mechanism 225 connected to one end of the second driving mechanism 224;

[0130] The second driving mechanism 224 is preferably a cylinder.

[0131] Furthermore, the propulsion mechanism 225 is located on one side of the first wedge plate 222 and is connected to a propulsion block 2251;

[0132] The side of the pushing block 2251 is connected to a second wedge plate 22511;

[0133] The outer sliding sleeve of the pushing block 2251 is provided with a guide sleeve 2211 connected to the side of the sleeve frame 221;

[0134] The pushing mechanism 225 is located on one side of the interior of the load-bearing cabinet 211 and is connected to a pushing plate 2252 ;

[0135] A guide rail 2131 is provided outside the pushing plate 2252 and between the inner walls of the carrying cabinet 211 ;

[0136] The inclined surface of the second wedge plate 22511 is rotatably connected to a guide wheel 22512 that contacts the first wedge plate 222 .

[0137] As an improvement, Figure 3-7 As shown, the lifting assembly 23 includes:

[0138] Lifting platform 231;

[0139] A second blanking plate 232 is used to rotate the light material box out of the lifting platform 231. The second blanking plate 232 is rotatably connected to the side discharge end of the lifting platform 231;

[0140] The lifting platform 231 is provided with a horizontal guide rail 2312 and a longitudinal guide rail 2311 in sequence on the upper part thereof;

[0141] A second guide groove 2313 is provided inside the lifting platform 231;

[0142] A lifting block 233 is slidably inserted into the second guide groove 2313;

[0143] A preload spring 2314 is connected to the upper end of the lifting block 233 and located inside the second guide groove 2313 ;

[0144] The side of the lifting block 233 is configured as an inclined surface;

[0145] A sleeve plate 235 is provided on the lower outer side of the lifting platform 231;

[0146] A thrust spring 236 is connected to the interior of the sleeve 235 and located at the lower end of the lifting platform 231;

[0147] The lower end of the lifting block 233 contacts the third blanking plate 234 connected to the side of the sleeve plate 235 .

[0148] As an improvement, Figure 8-9 As shown, the classification unit 3 includes:

[0149] Lightly classified components 31;

[0150] A heavy classification component 32, wherein the heavy classification component 32 and the light classification component 31 form a continuous circulating track;

[0151] The light classification component 31 includes: a conveyor frame 310;

[0152] A first collecting box 311 for collecting the classified light material boxes is arranged on the side of the conveying rack 310;

[0153] The upper end of the conveyor frame 310 is slidably connected to a transfer belt 3101;

[0154] The side of the transfer belt 3101 is engaged with a driving tooth 3102 for driving the transfer belt 3101 to circulate along the inside of the conveyor frame 310;

[0155] A first baffle plate 312 is installed on the upper portion of the conveying frame 310 and at the terminal end where the first collecting boxes 311 are arranged.

[0156] Further, such as Figure 10 As shown, the reclassification component 32 includes:

[0157] Second collection box 321;

[0158] The second collecting box 321 for collecting the classified heavy material boxes is connected to the transfer belt 3101 via a sliding plate 322;

[0159] The sliding plate 322 is provided with a pushing groove 3221 inside;

[0160] The lower end of the conveying frame 310 is connected to a third driving mechanism 323;

[0161] The side of the third driving mechanism 323 is provided with a third pushing plate 324 that matches the size of the pushing groove 3221;

[0162] The third driving mechanism 323 is preferably a cylinder.

[0163] It should be noted that, in the present invention, the corresponding material box can be pushed into the corresponding first collection box 311 or the second collection box 321 during the rotation of the transfer belt 3101 by using a signal scanning method in the prior art, that is, a classification code is affixed to the surface of the material box in advance, and when the material box reaches the corresponding classification code, the material box is pushed into the corresponding collection box by a pushing mechanism provided in the transfer belt 3101. The pushing mechanism is not shown in the figure of the present invention.

[0164] It is also necessary to add that Figure 5 As shown, in the present invention, a gap is provided between the upper end of the second push plate 223 and the lower end of the first push plate 213, and the size of the gap is adapted to the size of the material box screened by the corresponding size screening unit 1. That is, the larger the material box screened by the corresponding size screening unit 1, the larger the gap between the upper end of the second push plate 223 and the lower end of the first push plate 213. This effectively prevents the material box from being stuck between the second push plate 223 and the first push plate 213 when the second push plate 223 and the first push plate 213 are pushing the material box for light and heavy screening.

[0165] It should be noted that, when in use, the first drive mechanism 2117 and the second drive mechanism 224 are activated. Figure 5 、 Figure 8As shown, the first driving mechanism 2117 drives the fourth conveyor belt 2118 to rotate and simultaneously drives the second transfer shaft 2115 to rotate through the second belt 2116, the second transfer shaft 2115 drives the third conveyor belt 2114 to rotate, the third conveyor belt 2114 passes through the first transfer shaft 2113 and drives the second conveyor belt 2111 to rotate via the first belt 2112; Figure 3-4 As shown, the second driving mechanism 224 drives the pushing plate 2252 to reciprocate along the guide rail 2131 through the pushing mechanism 225, and the pushing plate 2252 drives the first pushing plate 213 to reciprocate along the longitudinal guide rail 2311. At the same time, the pushing mechanism 225 also drives the second wedge plate 22511 to move through the pushing block 2251. The second wedge plate 22511 pushes the first wedge plate 222 to reciprocate along the sleeve frame 221 through the guide wheel 22512. The first wedge plate 222 pushes the second pushing plate 223 to reciprocate along the transverse guide rail 2312.

[0166] The material boxes are sequentially placed at the feed end of the first conveyor belt 102. The first conveyor belt 102 first brings the material boxes to the high guide plate 1011, so that the material boxes that are higher or wider than the high guide plate 1011 are guided by the inclined high guide plate 1011 to the second conveyor belt 2111 for subsequent light and heavy screening process, while the material boxes on the first high guide plate 1011 enter the low guide plate 1012 for secondary screening. The present invention can be provided with a plurality of guide plates for screening material boxes. In this embodiment, only the high guide plate 1011 and the low guide plate 1012 are used for explanation, thereby achieving the goal of first screening the material boxes by size and sending the material boxes of similar size after each screening stage into the light and heavy screening area, thereby preventing material boxes of different sizes from interfering with the light and heavy screening process.

[0167] The material box after size screening enters the second conveyor belt 2111 and is transferred to the first blanking plate 212 by the second conveyor belt 2111 and finally slides onto the lifting platform 231. For light material boxes, such as Figure 3-4 、 Figure 6 、 Figure 8 As shown, due to the light weight of the material box, the lifting platform 231 compresses the thrust spring 236 downward for a shorter distance, and the lifting platform 231 sinks for a shorter distance. At this time, the light material box is pushed onto the second unloading plate 232 by the reciprocating first push plate 213 and slides along the second unloading plate 232 to the fourth conveyor belt 2118. The fourth conveyor belt 2118 sends the light material box to the transfer belt 3101 for classification. For heavy material boxes, such as Figure 4-8 As shown, when the heavy material box slides from the first blanking plate 212 to the lifting platform 231, the heavy material box compresses the thrust spring 236 downward by a large distance through the lifting platform 231. Figure 5, so that the upper end of the material box is lower than the first push plate 213 and the lower end of the material box is lower than the upper end of the second push plate 223, so that the material box is pushed out from the lifting platform 231 by the second push plate 223 and slides along the lifting block 233 and the third blanking plate 234 to the third conveyor belt 2114, and then the heavy material box is brought to the transfer plate 21151 by the third conveyor belt 2114 and slides along the transfer plate 21151 to the transfer belt 3101, thereby achieving the effect of automatically screening the light and heavy material boxes, and being able to divide the material boxes into two paths for transmission according to their light and heavy weights, and achieving the effect of accurate screening;

[0168] In addition, when screening heavy material boxes, such as Figure 5-7 As shown, in order to prevent the heavy material box from falling from the lifting platform 231 to the third blanking plate 234 and being damaged, the present invention inserts a lifting block 233 inside the first push plate 213. The lifting block 233 is always pressed against the third blanking plate 234 under the action of the pre-tightening spring 2314. When the heavy material box is on the lifting platform 231, the lifting platform 231 compresses the thrust spring 236 and moves downward, and the lifting block 233 moves upward along the second guide groove 2313 of the lifting platform 231, so that the heavy material box can pass through the lifting block 233 for transition before falling into the third blanking plate 234, thereby preventing the heavy material box from being damaged.

[0169] When the light material box and the heavy material box enter the transfer belt 3101 for classification, the classification codes on the surface of the light material box are pushed into different first collection boxes 311 in turn for classification and the classification work is completed at the first baffle plate 312. The classification codes on the surface of the heavy material box are pushed into different second collection boxes 321 in turn. When the heavy material box is pushed into the second collection box 321, it first passes through the sliding plate 322 and transitions obliquely downward from the transfer belt 3101 to the second collection box 321. Then, the activated third driving mechanism 323 pushes the medium material box through the third pushing plate 324 through the pushing groove 3221 to the second collection box 321 away from the sliding plate 322. In this way, the light material box and the heavy material box are separated, and it is prevented that the heavy material boxes are stacked together during the unloading process, causing the material box at the bottom of the collection box to be crushed.

[0170] The present invention effectively reduces the occupied area by using only one transfer belt 3101 to work during the classification process of the light material box and the heavy material box.

[0171] Example 2

[0172] like Figure 11 As shown, the components identical or corresponding to those in the first embodiment are designated by the corresponding reference numerals in the first embodiment. For simplicity, only the differences from the first embodiment are described below. The second embodiment differs from the first embodiment in that:

[0173] The automatic sorting method for a printing press comprises the following steps:

[0174] Step 1: Size screening process: The material boxes are sequentially conveyed by the first conveyor belt 102 and passed through the high guide plate 1011 and the low guide plate 1012 to screen the material boxes by size, so that the material boxes of similar sizes enter the corresponding second conveyor belt 2111 and are transported to the lifting platform 231 in sequence;

[0175] Step 2: Light and heavy material selection process: The lifting platform 231 checks the weight of the material box. For light material boxes, the first push plate 213 pushes them onto the second unloading plate 232 and then sends them to the transfer belt 3101 via the fourth conveyor belt 2118. For heavy material boxes, the second push plate 223 pushes them onto the third unloading plate 234 and finally sends them to the transfer belt 3101 via the third conveyor belt 2114.

[0176] Step 3, classification process: Classify the transfer belt 3101 according to different types of material boxes;

[0177] Step 4, unloading process: For light material boxes, they fall directly into the first collection box 311, and for heavy material boxes, they first slide along the sliding plate 322 to the initial end of the second collection box 321, and then are pushed to the end of the second collection box 321 by the third pushing plate 324.

[0178] It should be noted that the present invention pre-screens material boxes of different sizes and then screens the material boxes by weight to prevent the second push plate 223 and the first push plate 213 from pushing the material box at the same time and causing interference during the weight screening of material boxes with larger appearance and heavier weight on the lifting platform 231.

[0179] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Automatic sorting device for printing press, characterized in that: include: size screening unit; A light and heavy screening unit, the light and heavy screening unit being arranged on the side of the size screening unit; as well as A classification unit, the classification unit being arranged at the discharge end of the light and heavy screening unit; The light and heavy screening unit comprises: Light screening components; a heavy screening assembly, the heavy screening assembly being disposed below the light screening assembly; and A lifting assembly, the lifting assembly being arranged at the discharge end of the light screening assembly; After the material boxes are screened by size at the size screening unit, the material boxes of similar sizes pass through the light screening component and fall onto the lifting component in sequence. The lifting component automatically selects the light screening component and the heavy screening component according to the weight of the material boxes to perform light and heavy classification. The boxes then enter the classification unit along two different paths. The classification unit uses different unloading methods for light and heavy material boxes respectively. The lifting assembly comprises: Lifting platform; A second blanking plate, used for rotating the light material box out of the lifting platform, is rotatably connected to the discharge end of the lifting platform; The interior of the lifting platform is provided with a horizontal guide rail and a longitudinal guide rail in sequence; A second guide groove is provided inside the lifting platform; A lifting block is slidably inserted into the second guide groove; A preload spring is connected to the upper end of the lifting block and located inside the second guide groove; The side of the lifting block is configured as an inclined surface; A sleeve plate is provided on the lower outer side of the lifting platform; A thrust spring is connected inside the sleeve and at the lower end of the lifting platform; The lower end of the lifting block is in contact with the third blanking plate connected to the side of the sleeve plate; The classification unit includes: Lightly classified components; A heavy classification component, wherein the heavy classification component and the light classification component form a continuous circulating track; The light classification assembly includes: a conveyor frame; A first collecting box for collecting the classified light material boxes is arranged on the side of the conveying frame; The upper end of the conveyor frame is slidably connected to a transfer belt; A first baffle is installed on the upper portion of the conveying frame and at the terminal end where the first collecting boxes are arranged; The reclassification components include: Second collection box; The second collecting box for collecting the classified heavy material boxes is connected to the transfer belt via a sliding plate; A propulsion groove is provided inside the sliding plate; The lower end of the conveyor frame is connected to a third driving mechanism; A third push plate having a size matching that of the propulsion slot is provided on the side of the third driving mechanism.

2. The automatic sorting device for a printing press according to claim 1, characterized in that: The size screening unit includes: a frame; a first conveyor belt, the first conveyor belt being rotatably connected to the upper portion of the frame; A high guide plate and a low guide plate are sequentially provided on the upper part of the frame along the conveying direction of the first conveyor belt.

3. The automatic sorting device for a printing press according to claim 2, characterized in that: The light screening assembly comprises: load-bearing cabinet; a first blanking plate connected to a side of the load-bearing cabinet; a first push plate, the first push plate being slidably inserted into the interior of the load-bearing cabinet; One end of the first push plate is inserted into the lifting assembly; The first blanking plate is placed at an angle; The upper portion of the carrying cabinet is rotatably connected to a second conveyor belt.

4. The automatic sorting device for a printing press according to claim 3, characterized in that: The side portion of the load-bearing cabinet is rotatably connected to a first transfer shaft and a second transfer shaft in sequence along the same horizontal plane; A first driving mechanism is rotatably connected to the side of the load-bearing cabinet and is located on the same vertical axis as the second adapter shaft; The second conveyor belt is rotatably connected to the outside of the first transfer shaft via the first belt; The first transfer shaft is rotatably connected to the outer side of the second transfer shaft via a third conveyor belt; The second transfer shaft is rotatably connected to the driving end of the first driving mechanism via a second belt; A fourth conveyor belt is sleeved on the outer side of the first driving mechanism and is used to convey the material boxes screened by the light screening assembly to the classification unit.

5. The automatic sorting device for a printing press according to claim 4, characterized in that: The rescreening component includes: Frame; a first wedge-shaped plate, the first wedge-shaped plate being slidably inserted into the sleeve frame; a second push plate connected to a side portion of the first wedge-shaped plate for pushing out a weight on the lifting assembly; a second drive mechanism connected to a side of the light screening assembly; A propulsion mechanism is connected to one end of the second driving mechanism.

6. The automatic sorting device for a printing press according to claim 5, characterized in that: The propulsion mechanism is located on one side of the first wedge-shaped plate and is connected to a propulsion block; The side of the propulsion block is connected to a second wedge plate; The inclined surface of the second wedge plate is rotatably connected to a guide wheel in contact with the first wedge plate.

7. The sorting method for an automatic sorting device of a printing press according to claim 6, characterized in that: The following steps are involved: Step 1: Size screening process: The material boxes are sequentially conveyed by the first conveyor belt through the high guide plate and the low guide plate to screen the material boxes by size, so that the material boxes of similar sizes enter the corresponding second conveyor belt and are transported to the lifting platform in sequence; Step 2: Light and heavy material selection process: The lifting platform detects the weight of the material box. For light material boxes, the first push plate pushes them to the second unloading plate and then sends them to the transfer belt via the fourth conveyor belt. For heavy material boxes, the second push plate pushes them to the third unloading plate and finally sends them to the transfer belt via the third conveyor belt. Step 3: Classification process: Classify the transfer belt according to different types of material boxes; Step 4: Unloading process: For light material boxes, they fall directly into the first collection box. For heavy material boxes, they first slide along the sliding plate to the initial end of the second collection box, and then are pushed to the end of the second collection box by the third push plate.

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