Whole vehicle packaging system for practical training new energy model vehicles in universities and colleges

Abstract

The utility model relates to the technical field of practical training teaching equipment manufacturing, in particular to a whole vehicle packaging system for practical training new energy model vehicles in universities and colleges. The rear industrial robot is arranged behind the packaged finished product conveying line and has the packaging box grabbing function, the new energy model vehicle whole-vehicle grabbing function and the packaging box packaging function. The whole new energy model car conveying line, the execution tool quick-change platform, the packaging box supply device and the packaging operation platform are all covered by the motion range of the rear industrial robot. The front industrial robot is arranged in front of the packaged finished product conveying line, and under the assistance of the front industrial robot, the finished new energy model vehicle packaged semi-finished products completed through the packaging operation platform sequentially flow to the banding machine and the labeling machine and continue to flow to the packaged finished product conveying line. Through the combination of field observation and actual operation, students can fully master the overall operation principle of the new energy model vehicle whole vehicle packaging line and understand the specific operation modes of the industrial robot, the banding machine, the labeling machine and other equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of practical training teaching equipment manufacturing, in particular to a whole vehicle packaging system for a new energy model vehicle for practical training in colleges and universities. Background Art

[0002] The rapid development of the new energy vehicle industry requires more specialized talent. However, the current training of automation professionals lacks relevant new energy vehicle production lines, resulting in weak practical operation skills among students. After entering the enterprise, they still need to undergo long-term training and instruction before they can be competent on the job, which in turn increases the burden on enterprises. To help students fully understand the general manufacturing process of new energy vehicle production lines and improve their hands-on skills, many universities and colleges in China have introduced new energy vehicle production line training programs into their actual teaching.

[0003] After the new energy vehicle model is assembled, it is packaged to help students gain a basic understanding of the new energy vehicle packaging production line. However, prior art lacks technical content related to practical training on new energy vehicle packaging systems. Therefore, a solution to this problem is urgently needed. Utility Model Content

[0004] Therefore, in view of the above-mentioned existing problems and defects, the designers of this utility model collected relevant information, conducted multi-faceted evaluations and considerations, and continuously experimented and modified the system after years of R&D experience by technicians engaged in this industry, which ultimately led to the emergence of a whole-vehicle packaging system for practical training of new energy model vehicles in colleges and universities.

[0005] In order to solve the above-mentioned technical problems, the present utility model relates to a whole vehicle packaging system for new energy model vehicles for practical training in colleges and universities, comprising a finished product packaging conveyor line, a whole vehicle packaging conveyor line for new energy model vehicles, a front industrial robot, a rear industrial robot, a quick-change platform for execution tools, a packaging box supply device, a packaging operation platform, a strapping machine and a labeling machine. The rear industrial robot is arranged at the rear of the finished product packaging conveyor line, and it has the packaging box grabbing function, the whole vehicle packaging function of new energy model vehicles and the packaging box sealing function. The whole vehicle packaging conveyor line for new energy model vehicles, the quick-change platform for execution tools, the packaging box supply device and the packaging operation platform are all covered by the motion range of the rear industrial robot. The front industrial robot is arranged in front of the finished product packaging conveyor line, and with its assistance, the semi-finished whole vehicle packaging of the new energy model vehicles completed through the packaging operation platform is sequentially transferred to the strapping machine and the labeling machine to form the finished product packaging of the whole vehicle of the new energy model vehicles, and then continues to be transferred to the finished product packaging conveyor line.

[0006] As a further improvement of the technical solution disclosed in the present invention, the packaging box supply device includes a carrying platform, a packaging box storage box, a support bracket, a packaging box limiting unit and a packaging box pushing unit. The support bracket is detachable to achieve fixation with the carrying platform. The packaging box storage box is stacked and fixed on the support bracket. The packaging box storage box has both an upper opening and a lower opening. The stacked packaging boxes are placed in the packaging box storage box through the upper opening and continue to fall through the lower opening until they fall onto the carrying platform. The packaging box pushing unit and the packaging box limiting unit both use the carrying platform as the installation base and are arranged to the right and left of the support bracket respectively. The packaging box on the bottom layer goes out of the support bracket due to the pushing force from the packaging box pushing unit and continues to move horizontally until its relative position is determined under the action of the packaging box limiting unit.

[0007] As a further improvement to the technical solution disclosed in the present invention, the supporting platform is composed of a support frame and a supporting panel. The packaging box ejection unit includes a linear motion element, a sheet metal transmission component, an ejection plate, and a guide assembly. The ejection plate is placed flat on the supporting panel and, with the assistance of the guide assembly, performs a directionally directional displacement movement in the left and right directions, allowing the packaging box to be accurately pushed. The linear motion element uses the bottom wall of the supporting panel as a mounting base and transmits the driving force to the ejection plate with the help of the sheet metal transmission component. The supporting panel is provided with an escape notch that allows the sheet metal transmission component to freely perform translational movement.

[0008] As a further improvement of the technical solution disclosed in the present invention, the sheet metal transmission member is detachably fixedly connected to the ejection plate by means of screws. A plurality of mounting through holes are arranged in a rectangular array on the sheet metal transmission member.

[0009] As a further improvement to the technical solution disclosed in the present invention, the guide assembly is composed of a front guide bar and a rear guide bar that are detachably fixed to the load-bearing panel. Both the front guide bar and the rear guide bar are made of self-lubricating engineering plastics.

[0010] As a further improvement of the technical solution disclosed in the utility model, at least one weight-reducing hole is formed on the ejector plate.

[0011] As a further improvement to the technical solution disclosed in this utility model, the whole vehicle packaging system for new energy model vehicles used in practical training at universities and colleges also includes a visual inspection unit. This unit is used to capture images of the finished new energy model vehicles passing through the finished product packaging conveyor line. The visual inspection unit is integrated with the finished product packaging conveyor line.

[0012] As a further improvement of the technical solution disclosed in the utility model, the tool quick-change platform is also equipped with a packaging box vacuum suction cup and a new energy model car end clamp.

[0013] As a further improvement of the technical solution disclosed in the present utility model, the front industrial robot and the rear industrial robot are both multi-joint coordinate industrial robots.

[0014] As a further improvement of the technical solution disclosed in the utility model, the finished product packaging conveyor line and the new energy model car whole vehicle conveyor line are both selected as any one of a belt conveyor line, a plate chain conveyor line or a chain conveyor line.

[0015] The operating principle of the new energy model car whole vehicle packaging system for practical training in colleges and universities disclosed by the present invention is roughly as follows: with the help of the new energy model car whole vehicle conveyor line, the new energy model car whole vehicle model to be packaged is transferred to the packaging station; the rear industrial robot grabs the packaging box released by the packaging box supply device under the guidance of the terminal 3D vision system, and transfers it to the packaging operation platform for standby; the rear industrial robot moves again under the guidance of the terminal 3D vision system to grab the new energy model car whole vehicle model to be packaged, transfers it to the packaging box, and completes the sealing, so that the new energy model car whole vehicle packaging semi-finished product is formed; the front industrial robot grabs the new energy model car whole vehicle packaging semi-finished product under the guidance of the terminal 3D vision system, and sequentially transfers it to the strapping machine and the labeling machine, and completes the packaging box strapping operation and the label attaching operation respectively, and the new energy model car whole vehicle packaging finished product is formed; the front industrial robot moves again under the guidance of the terminal 3D vision system to grab the new energy model car whole vehicle packaging finished product, and transfers it to the packaging finished product conveyor line.

[0016] In practical applications, the whole vehicle packaging system for new energy model vehicles for practical training in colleges and universities disclosed in the present utility model can achieve at least the following beneficial technical effects, specifically:

[0017] 1) Through a combination of on-site observation and practical operation, students can fully grasp the overall operating principles of the new energy model car packaging line and understand the specific operating methods of industrial robots, strapping machines, labeling machines and other equipment;

[0018] 2) Through the rational layout and planning of the finished product packaging conveyor line, the new energy vehicle model vehicle conveyor line, the front industrial robot, the rear industrial robot, the packaging box supply device, the packaging operation platform, the strapping machine, and the labeling machine, the flow path of the new energy vehicle model and the packaging box are optimized, and the total length of the movement trajectory of the front industrial robot and the rear industrial robot during the single-piece packaging operation is shortened;

[0019] 3) The whole vehicle packaging system of the new energy model vehicle for practical training in colleges and universities has a relatively simple design form, is conducive to manufacturing implementation, and has a relatively low implementation cost, so it is suitable for students' practical training and teaching. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a three-dimensional schematic diagram of a whole vehicle packaging system for practical training of new energy model vehicles for colleges and universities disclosed in the utility model.

[0022] Figure 2 The utility model is a three-dimensional schematic diagram of a tool quick-changing platform in a whole vehicle packaging system for practical training of new energy model vehicles in colleges and universities disclosed in the utility model from one perspective.

[0023] Figure 3 It is a stereoscopic schematic diagram from another perspective of the execution tool quick-change platform in the whole vehicle packaging system of the new energy model vehicle for practical training in colleges and universities disclosed by the utility model.

[0024] Figure 4 The utility model is a three-dimensional schematic diagram of a packaging box supply device in a whole vehicle packaging system of a new energy model vehicle for practical training in colleges and universities disclosed by the utility model.

[0025] Figure 5 yes Figure 4 Top view of .

[0026] Figure 6 yes Figure 5 AA cross-sectional view.

[0027] Figure 7 The utility model is a three-dimensional schematic diagram of a packaging box ejecting unit in a whole vehicle packaging system for a new energy model vehicle for practical training in colleges and universities disclosed in the utility model.

[0028] Figure 8 This is a schematic diagram of the state after the support bracket, the packaging box limiting unit and the guide component are assembled relative to the carrying platform in the whole vehicle packaging system of the new energy model vehicle for practical training in colleges and universities disclosed by the utility model.

[0029] Figure 9 It is a three-dimensional schematic diagram of a visual inspection unit in a whole vehicle packaging system for practical training of new energy model vehicles in colleges and universities disclosed in the utility model.

[0030] 1- Finished product conveyor line; 2- New energy model car complete vehicle conveyor line; 3- Front industrial robot; 4- Rear industrial robot; 5- Quick-change platform for execution tools; 51- Vacuum suction cup for packaging box; 52- End gripper for new energy model car complete vehicle; 6- Packing box supply device; 61- Loading platform; 611- Support frame; 612- Loading panel; 6121- Avoidance gap; 62- Packing box storage box; 63- Support frame; 64- Packing box limit unit; 641- Front limiter; 642-rear limiter; 643-side limiter; 65-packaging box ejection unit; 651-cylinder; 652-sheet metal transmission part; 653-ejection plate; 6531-weight reduction hole; 654-guide assembly; 6541-front guide bar; 6542-rear guide bar; 655-screw; 7-packaging operation platform; 8-belting machine; 9-labeling machine; 10-visual inspection unit; 101-cantilever frame; 102-high-speed CCD camera. DETAILED DESCRIPTION

[0031] In the description of the present invention, it should be understood that the terms "left", "right", "up", "down", "front", "back", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They 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 direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0032] The following is a further detailed description of the present invention in conjunction with specific embodiments. Figure 1 The three-dimensional schematic diagram of the whole vehicle packaging system for new energy model vehicles for practical training in colleges and universities disclosed in the present invention is shown. It can be seen that it is mainly composed of a finished product packaging conveyor line 1, a whole vehicle new energy model vehicle conveyor line 2, a front industrial robot 3, a rear industrial robot 4, an execution tool quick-change platform 5, a packaging box supply device 6, a packaging operation platform 7, a strapping machine 8 and a labeling machine 9. Among them, the rear industrial robot 4 is arranged at the rear of the finished product packaging conveyor line 1, and it has the functions of grabbing the packaging box, grabbing the whole vehicle new energy model vehicle and sealing the packaging box. Figure 2 、 3As shown in the figure, the execution tool quick-change platform 5 is equipped with a packaging box vacuum suction cup 51 and a new energy model car end clamp 52. The new energy model car end clamp 52 is used to grab the new energy model car, while the packaging box vacuum suction cup 51 is used to grab and seal the packaging box. The new energy model car conveyor line 2, the execution tool quick-change platform 5, the packaging box supply device 6 and the packaging operation platform 7 are all covered by the motion range of the rear industrial robot 4. The front industrial robot 3 is arranged in front of the packaging finished product conveyor line 1, and with its assistance, the new energy model car complete vehicle packaging semi-finished product completed through the packaging operation platform is sequentially transferred to the strapping machine 8 and the labeling machine 9 to form the new energy model car complete vehicle packaging finished product, and then continues to flow to the packaging finished product conveyor line 1. Both the front industrial robot 3 and the rear industrial robot 4 are multi-joint coordinate industrial robots that can perform various complex operations and have excellent flexibility, accuracy and efficiency. Both the finished product packaging conveyor line 1 and the new energy model vehicle complete vehicle conveyor line 2 can be selected from a belt conveyor, a plate chain conveyor, or a chain conveyor. In practical training, through a combination of on-site observation and hands-on operation, students can fully grasp the overall operating principles of the new energy model vehicle complete vehicle packaging line and understand the specific operation of equipment such as industrial robots, strapping machines, and labeling machines.

[0033] It should also be noted that, in this embodiment, by rationally arranging and planning the finished product packaging conveyor line 1, the new energy model vehicle conveyor line 2, the front industrial robot 3, the rear industrial robot 4, the packaging box supply device 6, the packaging operation platform 7, the strapping machine 8, and the labeling machine 9, the circulation path of the new energy vehicle model and the circulation path of the packaging box are optimized, and the total length of the motion trajectory of the front industrial robot 3 and the rear industrial robot 4 in the single-piece packaging operation process is shortened.

[0034] like Figure 4 、 5As shown in Figure 6, the packaging box supply device 6 is mainly composed of several parts, such as a carrying platform 61, a packaging box storage box 62, a supporting bracket 63, a packaging box limiting unit 64, and a packaging box pushing unit 65. Among them, the carrying platform 61 is composed of a support frame 611 and a carrying panel 612. The supporting bracket 63 adopts a detachable manner to achieve fixation with the carrying panel 612. The packaging box storage box 62 is accumulated and fixed on the supporting bracket 63. The packaging box storage box 62 has both an upper opening and a lower opening. The multi-layer stacked packaging boxes are smoothly placed in the packaging box storage box 62 through the upper opening, and continue to fall through the lower opening until they fall on the carrying panel 612. The packaging box pushing unit 65 and the packaging box limiting unit 64 both use the carrying panel 612 as the installation base, and are arranged on the right and left of the supporting bracket 63 respectively. The bottom layer of the packaging box is pushed out of the support frame 63 by the pushing force from the packaging box pushing unit 65, and continues to move horizontally until its relative position is determined by the packaging box limiting unit 64 (such as Figure 8 By adopting the above technical solution, on the one hand, under the premise that there are packaging boxes stored in the packaging box storage box 62, each time the packaging box pushing unit 65 performs a pushing action, a single packaging box is ejected from the packaging box storage box 62 and accurately stopped with the assistance of the packaging box limiting unit 64, which is conducive to the subsequent industrial robot 4 to smoothly and quickly perform the grasping operation on it; on the other hand, the traditional belt conveyor is abandoned. The packaging boxes are accumulated in batches in the packaging box storage box 62. In addition, the design of the packaging box supply device 6 is small, which is conducive to saving workshop space.

[0035] like Figure 7 As shown in , the packaging box ejection unit 65 is mainly composed of several parts such as a cylinder 651, a sheet metal transmission member 652, a ejection plate 653, a guide assembly 654 and a screw 655. The ejection plate 653 is placed flat on the bearing panel 612, and with the assistance of the guide assembly 654, it performs displacement movement in a direction along the left and right directions, so that the packaging box can be pushed accurately. The cylinder 651 uses the bottom wall of the bearing panel 612 as the installation base, and it uses the sheet metal transmission member 652 to transmit the driving force to the ejection plate 653. The sheet metal transmission member 652 uses a plurality of screws 655 to achieve a detachable fixed connection with the ejection plate 653. There are a plurality of mounting through holes in a rectangular array on the sheet metal transmission member 652. An avoidance gap 6121 (such as ) is provided on the bearing panel 612 for the sheet metal transmission member 652 to freely perform translational movement. Figure 8In practice, packages are accumulated in batches in a package storage box 62. When packages are needed to be supplied externally, the cylinder 651 is activated to drive the ejection plate 653 to move toward the bottom-most package. The ejection force causes the bottom-most package to move out of the support bracket 63 and, with the assistance of the package stopper 64, to stop precisely in place.

[0036] Combined with attachment Figure 4 、 7 As shown in 8, it can be clearly seen that the guide assembly 654 is composed of a front guide bar 6541 and a rear guide bar 6542 that are detachably fixed to the support panel 612. The front guide bar 6541 and the rear guide bar 6542 are both made of self-lubricating engineering plastics. The front and rear side walls of the ejection plate 653 are in contact with the front guide bar 6541 and the rear guide bar 6542, respectively. In actual application, the coordinated guidance of the front guide bar 6541 and the rear guide bar 6542 allows the ejection plate 653 to perform directionally translated motion due to the thrust. In addition, the front guide bar 6541 and the rear guide bar 6542 both have excellent self-lubricating properties, and no significant frictional heat is generated during the friction movement, which helps reduce the translational resistance of the ejection plate 653.

[0037] Furthermore, if Figure 7 As shown in , two weight-reducing holes 6531 are formed on the ejection plate 653. Under the premise of ensuring that the structural strength of the ejection plate 653 meets the design requirements, such a design is conducive to reducing the deadweight of the ejection plate 653, paving the way for further reducing its translational resistance.

[0038] In addition, by Figure 1 As shown in FIG, it can be clearly seen that the whole vehicle packaging system for new energy model vehicles for practical training in colleges and universities is further equipped with a visual inspection unit 10. The visual inspection unit 10 is used to capture images of the finished product packaging of the whole vehicle of the new energy model vehicle flowing through the finished product packaging conveyor line 1, and is mainly composed of a cantilever frame 101 and a high-speed CCD camera 102 (as shown in FIG. Figure 9 (As shown in ). A cantilever frame 101 is used to carry a high-speed CCD camera 102 and is positioned adjacent to the finished product package conveyor line 1. High-speed CCD camera 102 takes real-time images of the surface of finished new energy model vehicle packages as they are being circulated. High-speed CCD camera 102 also incorporates a built-in deep learning algorithm, enabling it to quickly and accurately detect minor surface defects in finished new energy model vehicle packages using optical character recognition (OCR).

[0039] The operating principle of the new energy model car whole vehicle packaging system for practical training in colleges and universities disclosed in the present invention is roughly as follows: with the help of the new energy model car whole vehicle conveyor line 2, the new energy model car whole vehicle model to be packaged is transferred to the packaging station; the rear industrial robot 4 grabs the packaging box released by the packaging box supply device 6 under the guidance of the terminal 3D vision system, and transfers it to the packaging operation platform 7 for standby; the rear industrial robot 4 moves again under the guidance of the terminal 3D vision system to grab the new energy model car whole vehicle model to be packaged, transfer it to the packaging box, and complete the sealing, so that the new energy model car whole vehicle packaging semi-finished product is formed; the front industrial robot 3 grabs the new energy model car whole vehicle packaging semi-finished product under the guidance of the terminal 3D vision system, and sequentially flows to the strapping machine 8 and the labeling machine 9, and completes the packaging box strapping operation and the label attaching operation respectively, and the new energy model car whole vehicle packaging finished product is formed; the front industrial robot 3 moves again under the guidance of the terminal 3D vision system to grab the new energy model car whole vehicle packaging finished product and transfer it to the packaging finished product conveyor line 1.

[0040] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A whole vehicle packaging system for new energy model vehicles for practical training in colleges and universities, characterized by: It includes a finished product conveyor line, a new energy model car whole vehicle conveyor line, a front industrial robot, a rear industrial robot, an execution tool quick-change platform, a packaging box supply device, a packaging operation platform, a strapping machine and a labeling machine; the rear industrial robot is arranged at the rear of the finished product conveyor line, and has the packaging box grabbing function, the new energy model car whole vehicle grabbing function and the packaging box sealing function; the new energy model car whole vehicle conveyor line, the execution tool quick-change platform, the packaging box supply device and the packaging operation platform are all covered by the motion range of the rear industrial robot; the front industrial robot is arranged in front of the finished product conveyor line, and with its assistance, the new energy model car whole vehicle packaging semi-finished product completed through the packaging operation platform is sequentially transferred to the strapping machine and the labeling machine to form the new energy model car whole vehicle packaging product, and continues to flow to the finished product conveyor line.

2. The whole vehicle packaging system for new energy model vehicles for practical training in colleges and universities according to claim 1 is characterized in that The packaging box supply device includes a carrying platform, a packaging box storage box, a supporting bracket, a packaging box limiting unit and a packaging box pushing unit; the supporting bracket is detachable to achieve fixation with the carrying platform; the packaging box storage box is accumulated and fixed on the supporting bracket; the packaging box storage box has both an upper opening and a lower opening; multiple layers of stacked packaging boxes are placed in the packaging box storage box through the upper opening, and continue to fall through the lower opening until they fall on the carrying platform; the packaging box pushing unit and the packaging box limiting unit both use the carrying platform as an installation base, and are respectively arranged to the right and left of the supporting bracket; the packaging box on the bottom layer goes out of the supporting bracket due to the pushing force from the packaging box pushing unit, and continues to move horizontally until its relative position is determined under the action of the packaging box limiting unit.

3. The whole vehicle packaging system for new energy model vehicles for practical training in colleges and universities according to claim 2 is characterized in that The supporting platform is composed of a support frame and a supporting panel; the packaging box ejection unit includes a linear motion element, a sheet metal transmission part, a ejection plate and a guide assembly; the ejection plate is placed flat on the supporting panel, and with the assistance of the guide assembly, it performs displacement movement in a directional manner along the left and right directions, so that the packaging box can be pushed accurately; the linear motion element uses the bottom wall of the supporting panel as the installation base, and it uses the sheet metal transmission part to transmit the driving force to the ejection plate; an avoidance gap is opened on the supporting panel for the sheet metal transmission part to freely perform translational movement.

4. The whole vehicle packaging system for new energy model vehicles for practical training in colleges and universities according to claim 3 is characterized in that The sheet metal transmission part is connected to the ejection plate in a detachable and fixed manner by means of screws; there are a plurality of mounting holes in a rectangular array on the sheet metal transmission part.

5. The whole vehicle packaging system for new energy model vehicles for practical training in colleges and universities according to claim 3 is characterized in that The guide assembly is composed of a front guide bar and a rear guide bar that are detachably fixed on the bearing panel; and the front guide bar and the rear guide bar are both self-lubricating engineering plastics.

6. The whole vehicle packaging system for new energy model vehicles for practical training in colleges and universities according to claim 3 is characterized in that At least one weight-reducing hole is formed on the ejector plate.

7. The whole vehicle packaging system for new energy model vehicles for practical training in colleges and universities according to any one of claims 1 to 6 is characterized in that , also includes a visual inspection unit; the visual inspection unit is used to capture images of the new energy model vehicle packaged products flowing through the packaged finished product conveyor line, and it is matched with the packaged finished product conveyor line.

8. The whole vehicle packaging system for new energy model vehicles for practical training in colleges and universities according to any one of claims 1 to 6 is characterized in that ,The execution tool quick change platform is also equipped with a packaging box vacuum suction cup and a new energy model vehicle end gripper.

9. The whole vehicle packaging system for new energy model vehicles for practical training in colleges and universities according to any one of claims 1 to 6 is characterized in that ,The front industrial robot and the rear industrial robot are both multi-joint coordinate industrial robots.

10. The whole vehicle packaging system for new energy model vehicles for practical training in colleges and universities according to any one of claims 1 to 6, characterized in that The packaged finished product conveyor line and the new energy model vehicle conveyor line are both selected as any one of a belt conveyor line, a plate chain conveyor line or a chain conveyor line.

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