CN217650320U

CN217650320U - Turnover mechanism and weighing and printing system thereof

Info

Publication number: CN217650320U
Application number: CN202121970862.9U
Authority: CN
Inventors: 邹大鹏; 邝军; 夏文明; 刘伟; 伍智林; 孙晗
Original assignee: Guangzhou Jinxiang Intelligent Package Machinery Co ltd; Guangdong University of Technology
Current assignee: Guangzhou Jinxiang Intelligent Package Machinery Co ltd; Guangdong University of Technology
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2022-10-25
Anticipated expiration: 2031-08-20

Abstract

The utility model relates to the technical field of equipment manufacturing, in particular to a turnover mechanism and a weighing and printing system thereof, wherein the weighing and printing system comprises a transmission device, a weighing and checking device and a printing and labeling device; the weighing and testing equipment is used for weighing and testing the product to obtain product information; the printing and labeling equipment is used for printing labels of product information and attaching the labels to the surfaces of products; the turnover mechanism, the weighing and testing equipment and the printing and labeling equipment are connected in sequence through the transmission equipment to form a production line; the conveying device is used for conveying products. The utility model provides high tilting mechanism's occupation of land space utilization to combine the printing system of weighing, realize the automated production of product, thereby improved the competitiveness of work efficiency and product.

Description

Turnover mechanism and weighing and printing system thereof

Technical Field

The utility model relates to an equipment manufacturing technical field especially relates to a tilting mechanism and printing system weighs thereof.

Background

With the development of science and technology and the progress of society, many enterprises have adopted automatic production lines to carry out production, the automatic production relates to all industries of society, and the application of automation in all industries greatly improves the competitiveness of product price. In order to maintain the competitive power of product price, the automatic production line must continuously absorb high technology to meet the production demand.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a tilting mechanism and printing system weighs thereof realizes high-speed real-time product processing, transmission, weighs and prints the integration function.

A turnover mechanism comprises a turnover rack, wherein conveying line supporting seats are arranged on two sides of the turnover rack, a pair of fixing columns which are oppositely arranged is arranged in the middle of the turnover rack, turnover equipment is connected between the pair of fixing columns and used for turning over products, and the turnover equipment comprises a turnover roller, a turnover roller supporting seat, a driving roller and a turnover rod;

the two ends of the overturning roller are connected between the pair of fixed columns through the overturning roller supporting seat, the overturning roller supporting seat is provided with a through hole, the overturning roller penetrates through the through hole and is rotatably connected to the overturning roller supporting seat, the overturning roller supporting seats are arranged on the overturning roller at equal intervals, the two ends of the overturning roller supporting seat are respectively and rotatably connected with the driving roller, the other end of the driving roller is respectively and rotatably connected with the transmission line supporting seat, the driving roller positioned on any side of the overturning roller is connected with an input transmission line, and the driving roller positioned on the other side of the overturning roller is connected with an output transmission line;

and the adjacent driving rollers on the same side are provided with turnover rods, and the turnover rods turn over or reset towards the driving rollers on the other side by taking the turnover rollers as axes under the action of power so as to turn over the product.

Preferably, one end of the turning rod, which is close to the turning roller, is provided with a guide part, an included angle is formed between the guide part and the turning rod, and the included angle is 80-100 degrees.

Preferably, the two sides of the turnover rack are respectively provided with a restraint plate, and the restraint plates are arranged on the outer side of the conveying line supporting seat.

The weighing and printing system using the turnover mechanism is characterized by comprising a conveying device, a weighing and testing device and a printing and labeling device;

the weighing and testing equipment is used for weighing and testing the product to obtain product information; the printing and labeling equipment is used for printing labels of product information and attaching the labels to the surfaces of products;

the weighing and testing equipment, the turnover mechanism and the printing and labeling equipment are connected in sequence through the transmission equipment to form a production line; the conveying device is used for conveying products.

Preferably, the weighing and testing equipment comprises a weighing bracket, and the weighing bracket is provided with a first bracket and a second bracket which are arranged in a staggered manner;

the first support is sequentially provided with a buffer conveyor belt, a weighing conveyor belt and an eliminating conveyor belt, a weighing sensor is arranged below the weighing conveyor belt and used for monitoring the weight of products above the weighing conveyor belt in real time and outputting the data, eliminating components are arranged on two sides of the eliminating conveyor belt and used for eliminating unqualified products for weighing, and the buffer conveyor belt, the weighing conveyor belt and the eliminating conveyor belt are respectively provided with a speed regulating motor;

the second support mounting has control electronic box and three-colour warning light, the control electronic box controls respectively the buffer conveyer belt, the conveyer belt of weighing and the buncher drive of rejecting the conveyer belt, the three-colour warning light is used for indicateing the production situation of production line.

Preferably, the weigh test apparatus further comprises an activation detector comprising one or more of a photo trigger detector, a time interval trigger detector, a weight threshold detector and a program trigger detector.

Preferably, the rejecting assembly comprises a signal transceiver, a rejecting cylinder, a rejecting push plate and a rejecting collecting box, the signal receiver is electrically connected with the rejecting cylinder and the weighing sensor, and the signal transceiver is used for receiving a signal of an unqualified product sent by the weighing sensor and sending a starting signal to the rejecting cylinder; the rejecting cylinder and the rejecting push plate are arranged on one side of the rejecting conveyor belt, the rejecting collecting box is arranged on the other side of the rejecting conveyor belt, the rejecting push plate is driven by the rejecting cylinder to push unqualified products on the rejecting conveyor belt, the moving direction of the rejecting push plate is perpendicular to the transmission direction of the rejecting conveyor belt, the opening of the rejecting collecting box faces the rejecting push plate, and the rejecting collecting box is used for collecting weighed unqualified products.

Preferably, the printing and labeling device comprises a printer frame, a labeling conveyor belt and a universal adjusting seat are arranged above the printer frame, the universal adjusting seat is arranged on one side of the labeling conveyor belt and comprises a connecting plate, and a printing and labeling assembly is fixedly mounted on the connecting plate;

the printing and labeling assembly comprises a unrolling device, a printing engine, a guide piece and a base paper rolling device, wherein the unrolling device is used for outputting label paper, the printing engine is used for printing labels, the guide piece is used for peeling the labels from the label paper, and the base paper rolling device is used for collecting the base paper; the uncoiler, the printing engine, the guide piece and the base paper coiler are detachably connected with the connecting plate;

the printing engine is arranged right above the labeling conveyor belt, a receiver is arranged in the printing engine, and the receiver is used for receiving weighing information of qualified products.

Preferably, the universal adjusting seat comprises a connecting rod, an upper fixing plate, a lower fixing plate and a pair of fixing columns arranged between the upper fixing plate and the lower fixing plate, and the upper fixing plate, the lower fixing plate and the fixing columns are connected with the connecting plate through the connecting rod;

adjusting screw rods penetrate through the middle parts of the upper fixing plate and the lower fixing plate and are used for adjusting the distance between the upper fixing plate and the lower fixing plate and the included angle of the universal adjusting seat relative to the labeling conveying belt, adjusting hand wheels are arranged at the top ends of the pair of fixing columns, and the adjusting screw rods are connected with the middle shafts of the adjusting hand wheels.

Compared with the prior art, the technical scheme has the following beneficial effects: the occupied space utilization rate of the turnover mechanism is improved, and the automatic production of products is realized by combining the weighing and printing system, so that the working efficiency and the competitiveness of the products are improved.

Drawings

Fig. 1 is a schematic structural view of the turnover mechanism of the present invention;

fig. 2 is a schematic top view of the turnover mechanism of the present invention;

fig. 3 is a schematic structural view of the turning bar and the guide bar of the turnover mechanism of the present invention;

fig. 4 is a schematic structural view of a weighing and testing device of the weighing and printing system of the present invention;

fig. 5 is a schematic structural diagram of a printing and labeling device of the weighing and printing system of the present invention;

fig. 6 is a schematic structural diagram of the turnover mechanism and the weighing and printing system thereof;

in the drawings: the device comprises a weighing bracket 10, a buffer conveyor belt 11, a weighing conveyor belt 12, a removing conveyor belt 13, a removing component 14, a control electronic box 15, a three-color warning lamp 16, a connecting plate 22, a printer frame 21, a turnover frame 31, a conveyor line supporting seat 32, a fixing column 33, a first bracket 101, a second bracket 102, a weighing sensor 121, a removing cylinder 141, a removing push plate 142, a removing collecting box 143, a labeling conveyor belt 201, a fixing rod 202, a unreeling device 231, a printing engine 232, a guide member 233, a bottom paper winder 234, an upper fixing plate 241, a lower fixing plate 242, a fixing column 243, an adjusting screw 244, an adjusting hand wheel 245, a turnover roller 341, a turnover roller supporting seat 342, a driving roller 343, a turnover rod 344, a guiding part 345, a limiting plate 346 and an included angle A between the guiding part and the turnover rod.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

As shown in fig. 1, a turnover mechanism includes a turnover rack 31, two sides of the turnover rack 31 are provided with conveyor line supporting seats 32, a pair of oppositely arranged fixed columns 33 is arranged in the middle of the turnover rack 31, a turnover device is connected between the pair of fixed columns 33, and the turnover device includes a turnover roller 341, a turnover roller supporting seat 342, a driving roller 343 and a turnover rod 344;

the two ends of the turning roller 341 are connected between the pair of fixed columns 33 through the turning roller supporting base 342, the turning roller supporting base 342 is provided with a through hole, the turning roller 341 is rotatably connected to the turning roller supporting base 342 through the through hole, the turning roller supporting bases 342 are arranged on the turning roller 341 at equal intervals, the two ends of the turning roller supporting base 342 are respectively rotatably connected with the driving rollers 343, the other ends of the driving rollers 343 are respectively rotatably connected with the conveying line supporting base 342, the driving rollers 343 on any one side of the turning roller 341 are connected with an input conveying line, and the driving rollers 343 on the other side of the turning roller 341 are connected with an output conveying line;

the turning rods 344 are arranged between the adjacent driving rollers 343 on the same side, and the turning rods 344 turn or reset towards the driving roller 343 on the other side by taking the turning roller 341 as an axis under the action of power so as to turn the product.

The transmission line supporting seats 32 are arranged on two sides of the overturning rack 31, the transmission line supporting seat 32 on one side is connected with an input transmission line, the transmission line supporting seat 32 on the other side is connected with an output transmission line, the interiors of the transmission line supporting seats 32 are respectively in transmission connection with the input transmission line and the output transmission line, a pair of fixing columns 33 are arranged in the middle of the overturning rack 31, the overturning rollers 341 are rotatably connected to the fixing columns 33 through holes of a plurality of overturning roller supporting seats 342 arranged at intervals, and the installation and the rotating stability of the overturning rollers 341 are guaranteed; the two ends of the turning roll supporting seat 342 are respectively connected with the transmission rolls 343, the two ends of the transmission rolls 343 are respectively supported by the turning roll supporting seat 342 and the conveying line supporting seat 32, and the transmission rolls 343 are respectively driven by the power of the input conveying line and the power of the output conveying line to rotate by connecting the conveying line supporting seat 32, so that the different rotating speeds of the transmission rolls 343 on the two sides of the turning roll supporting seat 342 can be realized; in addition, the two sides of the turning roller 341 are connected with symmetrical turning rods 344, the turning rods 344 are arranged in a crossed manner with the driving rollers 343 and do not interfere with each other, the turning rods 344 adjacent to the same side rotate towards the driving rollers 343 on the other side by taking the turning roller 341 as an axis under the action of power, so that the turning rods 344 and the driving rollers 343 respectively rotate along the vertical direction without interfering with each other, the space utilization rate of the turning equipment is improved, and meanwhile, the automation of the turning equipment is realized, and the working efficiency is improved.

To explain further, the transmission chain is arranged in the transmission line supporting seat 32 connected with the input transmission line and the output transmission line respectively, and the transmission chain is connected with the transmission roller 343, so that the transmission roller 343 rotates under the action of power to realize the transmission of the product; and the rotating speed of the driving roller 343 at both ends of the turning roller supporting base 342 is respectively connected with the conveying speed v of the connected input conveying line ₁ And a transfer speed v of the output transfer line ₂ Related to; in addition, since the plurality of turnover rods 344 are symmetrically connected to the turnover rollers 341, the rotation speed of the turnover rods 344 is equal to that of the turnover rollers 341.

More specifically, as shown in fig. 2, a guiding portion 345 is disposed at one end of the turning rod 344 close to the turning roller 341, and an included angle a is formed between the guiding portion 345 and the turning rod 344, and the included angle a is 80-100 °. The guiding part 345 and the turning rod 344 support the products together, so that the products are driven to turn 90 degrees from one side connected with the input conveying line, and the turned products fall back to one side of the output conveying line, so that the products are prevented from sliding, falling and misplacing in the rotating process of the turning roller 341; the guide portion 345 is angled at an angle of 80 deg. -100 deg., preferably 90 deg., to the tipping bar 344, taking into account the size and weight of the various products.

To be further described, the two sides of the turnover frame 31 are respectively provided with a constraint plate 346, and the constraint plates 346 are arranged outside the conveyor line supporting seat 32. The constraining plate 346 is simple in shape, and is used for correcting misalignment, constraining and guiding products, limiting the movement of the products to ensure that the products enter the reversing bar 344 from the product input conveying line according to normal postures, and enter the product output conveying line after being reversed, so that the product reversing process is completed, and the production efficiency is ensured.

Further, the turnover mechanism further comprises a weighing and printing system, and is characterized in that the weighing and printing system comprises a transmission device, a weighing and testing device and a printing and labeling device;

In a further description, the weighing and testing device comprises a weighing bracket 10, wherein the weighing bracket is provided with a first bracket 101 and a second bracket 102 which are arranged in a staggered manner;

the first support 101 is sequentially provided with a buffer conveyor belt 11, a weighing conveyor belt 12 and a rejection conveyor belt 13, a weighing sensor 121 is arranged below the weighing conveyor belt 12, the weighing sensor 121 is used for monitoring the weight of products above the weighing conveyor belt 12 in real time and outputting the data, rejection components 14 are arranged on two sides of the rejection conveyor belt 13, the rejection components 14 are used for rejecting unqualified products for weighing, and the buffer conveyor belt 11, the weighing conveyor belt 12 and the rejection conveyor belt 13 are respectively provided with a speed regulating motor;

second support 102 installs control electronic box 15 and three-colour warning light 16, control electronic box 15 controls respectively buffer conveyer belt 11, weighing conveyer belt 12 and the buncher drive of rejecting conveyer belt 13, three-colour warning light 16 is used for indicateing the production situation of production line.

The first support 101 is used for placing the buffer conveyor belt 11, the weighing conveyor belt 12 and the rejecting conveyor belt 13 to convey products, the second support 102 is provided with the control electronic box, and the first support 101 and the second support 102 which are arranged in a staggered manner are provided with the three-color warning lamp 16 to prompt the production condition of the production line, so that an operator can conveniently observe and supervise the production condition of the products from each part, the adjustment is convenient in time, and the production efficiency is improved; set up buffering conveyer belt 11 through control electronic box 15, conveyer belt 12 weighs and reject different transmission speed between the conveyer belt 13, avoid appearing the too close condition of distance between the product, lead to weighing on the conveyer belt a plurality of products and weigh and lead to follow-up rejection to make mistakes, and conveyer belt 12 of weighing realizes the function of weighing, through adjusting the conveying speed of product on the different conveyer belts, can realize the long interval of a plurality of products of same batch and weigh the back output, improve the check weighing accuracy of product.

By way of further illustration, the weigh testing apparatus further comprises an activation detector comprising one or more of a photo trigger detector, a time interval trigger detector, a weight threshold detector, and a program trigger detector.

The start detection principle of the weighing and testing device has the following four principles: (1) photoelectric trigger detection; (2) triggering detection at a time interval; (3) detecting a weight threshold; (4) the program triggers detection.

(1) And photoelectric trigger detection, namely, using a photoelectric trigger detector, and triggering a weighing signal immediately to detect the weight of a product when a photoelectric sensor at the head and the tail of a set area detects the product. The arrangement of the photoelectric sensors at the head and the tail of the region is respectively set according to the length, the width and the height of different products, usually two photoelectric sensors at the head and the tail are arranged, and 1-2 photoelectric sensors in the height can be added for products with larger height.

(2) Time interval triggers the detection, uses time interval to trigger the detector, is applicable to high-speed stable measurement usually, and when the product motion was quick, directly started the detection of weighing according to the beat interval of product this moment, record weighing data and quantity record, photoelectric sensor was only as judgement volume and count volume this moment, does not regard as the controlled variable that starts the weighing, when both mismatch, reports the mistake and corrects.

(3) The weight threshold detection uses the weight threshold detector, is suitable for the products difficult to detect photoelectrically, adopt to set for an initial threshold at this moment, weigh constantly, reach certain degree when measuring the weight, record weighing data and quantity record immediately, photoelectric sensor is only as judgement volume and count quantity at this moment, not as the control volume that starts weighing, when the two mismatch, report the mistake and correct.

(4) And the program trigger detection is realized by using a program trigger detector, so that the method is suitable for repeatedly measuring the same product and the like in a small batch and debugging state, and the detection is realized by program trigger.

In another preferred embodiment, the weighing conveyer belt is further provided with a temperature detection device and a quantity counting device. The temperature detection device comprises a temperature detection sensor and is used for feeding back temperature measurement information when the product is weighed; the quantity counting device comprises a photoelectric trigger detector for counting the quantity of the products passing through the weighing conveyer belt.

To illustrate further, the rejecting assembly 14 includes a signal transceiver, a rejecting cylinder 141, a rejecting push plate 142 and a rejecting and collecting box 143, the signal transceiver is electrically connected to the rejecting cylinder 141 and the weighing sensor 121, the signal transceiver is configured to receive a signal of a defective product from the weighing sensor 121 and is configured to send a start signal to the rejecting cylinder; the removing cylinder 141 and the removing push plate 142 are arranged on one side of the removing conveyor belt 13, the removing collecting box 143 is arranged on the other side of the removing conveyor belt 13, the removing push plate 142 is driven by the removing cylinder 141 to push the unqualified products on the removing conveyor belt 13, the moving direction of the removing push plate 141 is perpendicular to the transmission direction of the removing conveyor belt 13, the opening of the removing collecting box 143 faces the removing push plate 142, and the removing collecting box 143 is used for collecting weighed unqualified products.

When the signal transceiver receives an unqualified product signal sent by the weighing sensor 121, the rejecting cylinder 141 drives the rejecting push plate 142 to push the unqualified product conveyed to the rejecting conveyor belt 13 into the rejecting collection box 143; in addition, the surface of the product can not be damaged by adopting a pushing mode, and the product can accurately fall into the removing and collecting box 143.

Further, the printing and labeling device comprises a printer frame 21, a labeling conveyor belt 201 and a universal adjusting seat are arranged above the printer frame 21, the universal adjusting seat is arranged on one side of the labeling conveyor belt, the universal adjusting seat comprises a connecting plate 22, and a printing and labeling assembly is fixedly mounted on the connecting plate 22;

the printing and labeling assembly comprises a unrolling device 231, a printing engine 232, a guide piece 233 and a base paper rolling device 234, wherein the unrolling device 231 is used for outputting label paper, the printing engine 232 is used for printing labels, the guide piece 233 is used for peeling the labels from the label paper, and the base paper rolling device 234 is used for collecting the base paper; the unwinder 231, the print engine 232, the guide 233, and the base paper winder 234 are detachably connected to the connection plate 22;

the printing engine 232 is arranged right above the labeling conveyor belt 201, and a receiver is arranged inside the printing engine 232 and used for receiving weighing information of qualified products.

The unrolling device 231, the printing engine 232, the guide member 233 and the base paper rolling device 234 of the embodiment are detachably connected with the connecting body 22, so that a client can freely replace components according to different requirements, the maintenance time of equipment failure can be reduced, replacement can be rapidly carried out as long as spare parts are provided, and after-sales personnel are not needed to arrive at the scene immediately; secondly, print engine 232 arranges directly over subsides mark conveyer belt 201, adjusts the position of print engine 232 for pasting the product on the mark conveyer belt through universal adjustment seat, makes print engine 232 receive product information at the receiver when, can carry out quick accurate mark to the product, improves production efficiency.

More specifically, the universal adjusting seat includes a connecting rod 202, an upper fixing plate 241, a lower fixing plate 242, and a pair of fixing posts 243 disposed between the upper fixing plate 241 and the lower fixing plate 242, wherein the upper fixing plate 241, the lower fixing plate 242, and the fixing posts 243 are connected to the connecting plate 22 through the connecting rod 202;

an adjusting screw 244 penetrates through the middle parts of the upper fixing plate 241 and the lower fixing plate 242, the adjusting screw 244 is used for adjusting the distance between the upper fixing plate 241 and the lower fixing plate 242 and the rotating included angle of the universal adjusting seat relative to the labeling conveyor belt 201, adjusting hand wheels 245 are arranged at the top ends of a pair of fixing columns 243, and the adjusting screw 244 is connected to the middle shafts of the adjusting hand wheels 245.

Can adjust through adjusting screw 244 distance between upper fixed plate 241 and the bottom plate 242 to and universal adjustment seat is for pasting mark conveyer belt 201 pivoted contained angle, realize linking body 22 vertical direction reciprocate with control of controlling inclination, and then to fixed connection at the height and the slope control of the printing labeling equipment of connecting plate 22, further carry out accurate subsides mark to the product better, improve production efficiency.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and is not to be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will realize other embodiments of the present invention without inventive efforts, and such equivalent modifications or substitutions are included within the scope of the present invention as defined in the appended claims.

Claims

1. A turnover mechanism is characterized in that: the turnover machine comprises a turnover rack, wherein conveying line supporting seats are arranged on two sides of the turnover rack, a pair of oppositely arranged fixing columns is arranged in the middle of the turnover rack, turnover equipment is connected between the pair of fixing columns and used for turning over products, and the turnover equipment comprises a turnover roller, a turnover roller supporting seat, a driving roller and a turnover rod;

the two ends of the overturning roller are connected between the pair of fixed columns through the overturning roller supporting seat, the overturning roller supporting seat is provided with a through hole, the overturning roller penetrates through the through hole and is rotatably connected to the overturning roller supporting seat, the overturning roller supporting seats are arranged on the overturning roller at equal intervals, the two ends of the overturning roller supporting seat are respectively rotatably connected with the driving rollers, the other ends of the driving rollers are respectively rotatably connected with the conveying line supporting seat, the driving rollers positioned on any one side of the overturning roller are connected with an input conveying line, and the driving rollers positioned on the other side of the overturning roller are connected with an output conveying line;

2. A turnover mechanism as set forth in claim 1 in which: one end of the turning bar, which is close to the turning roller, is provided with a guide part, an included angle A is arranged between the guide part and the turning bar, and the included angle A is 80-100 degrees.

3. A turnover mechanism as claimed in claim 2, in which each side of the turnover frame is further provided with a restraining plate, and the restraining plates are disposed outside the conveyor line supporting base.

4. A weighing and printing system using the turnover mechanism of any one of claims 1 to 3, wherein the weighing and printing system comprises a conveying device, a weighing and testing device and a printing and labeling device;

the weighing and testing equipment is used for weighing and testing the product to obtain product information; the printing and labeling equipment is used for printing a label of product information and attaching the label to the surface of a product;

5. The weighing and printing system of claim 4, wherein the weighing and checking device comprises a weighing bracket provided with a first bracket and a second bracket in a staggered high-low arrangement;

6. The weigh printing system of claim 5, wherein the weigh inspection apparatus further comprises an activation detector comprising one or more of a photo trigger detector, a time interval trigger detector, a weight threshold detector, and a program trigger detector.

7. The weighing and printing system of claim 5, wherein the rejecting assembly comprises a signal transceiver, a rejecting cylinder, a rejecting push plate and a rejecting and collecting box, the signal transceiver is electrically connected with the rejecting cylinder and the weighing sensor, and the signal transceiver is used for receiving a signal of a defective product sent by the weighing sensor and sending a starting signal to the rejecting cylinder; the rejecting cylinder and the rejecting push plate are arranged on one side of the rejecting conveyor belt, the rejecting collecting box is arranged on the other side of the rejecting conveyor belt, the rejecting push plate is driven by the rejecting cylinder to push unqualified products on the rejecting conveyor belt, the moving direction of the rejecting push plate is perpendicular to the transmission direction of the rejecting conveyor belt, the opening of the rejecting collecting box faces the rejecting push plate, and the rejecting collecting box is used for collecting weighed unqualified products.

8. The weighing and printing system according to claim 4, wherein the printing and labeling device comprises a printer frame, a labeling conveyor belt and a universal adjusting seat are arranged above the printer frame, the universal adjusting seat is arranged on one side of the labeling conveyor belt, the universal adjusting seat comprises a connecting plate, and a printing and labeling assembly is fixedly arranged on the connecting plate;

the printing and labeling assembly comprises a unwinder, a printing engine, a guide piece and a base paper winder, wherein the unwinder is used for outputting label paper, the printing engine is used for printing labels, the guide piece is used for peeling the labels from the label paper, and the base paper winder is used for collecting the base paper; the uncoiler, the printing engine, the guide piece and the base paper coiler are detachably connected with the connecting plate;

the printing engine is arranged right above the labeling conveyor belt, a receiver is arranged inside the printing engine, and the receiver is used for receiving weighing information of qualified products.

9. The weighing and printing system of claim 8, wherein the universal adjusting base comprises a connecting rod, an upper fixing plate, a lower fixing plate and a pair of fixing columns arranged between the upper fixing plate and the lower fixing plate, and the upper fixing plate, the lower fixing plate and the fixing columns are connected with the connecting plate through the connecting rod;