Method for pedestrians to pass through line body friendly to equipment operation efficiency

Abstract

The invention discloses a method for pedestrians to pass through a line body friendly to equipment operation efficiency, which is realized by the following steps: 1) an automatic door passing through a passage is controlled by a servo motor, when the line body is in an automatic state, the automatic door is in a closed state, people cannot directly enter the passage, and a red light is always on; (2) when a pedestrian needs to pass, a passing request button is pressed down; and after the PLC connected with the passing button receives the pedestrian passing request, the station in front of the channel does not trigger the departure signal any more. The production efficiency is high. Pedestrians can be allowed to rapidly pass through the production line while rapid linkage vehicle transmission is guaranteed, and equipment problems in the line body are responded and processed. And the safety of passing people is ensured. When the channel is closed, people are prevented from mistakenly rushing through three modes of physical blocking, traffic light prompting and a safety scanner of the automatic door which is automatically opened and closed, and after the channel is opened, the skid and the people are prevented from entering other areas to cause safety accidents through the skid check block and the safety optical grating.

Description

Technical Field

[0001] The present invention relates to the technical field related to intelligent devices, and in particular to a pedestrian crossing line method that is friendly to device operation efficiency. Background Art

[0002] The degree of automation in automobile manufacturing welding workshops is getting higher and higher. The assembly of cover parts has been changed from manual assembly to automatic assembly by Bestfit robots, with an assembly automation rate of 100%. Taking a production line of Mercedes-Benz as an example, there are 15 workstations in the assembly line, including 8 assembly workstations and 7 parking spaces without process. During the production process, all workstations produce synchronously. After the process of each workstation is completed, it is ready for departure. When there is an empty space in front, the body transmission is started.

[0003] Since the fully automated assembly line has a total of 15 workstations and the production line is relatively long, a passage for manual passage must be reserved in the middle of the production line to facilitate quick response during equipment maintenance.

[0004] How to ensure the operating efficiency of the fully automatic assembly line, remind pedestrians to pass as quickly as possible, and effectively prevent pedestrians from mistakenly entering the safety zone, while setting up a reasonable manual passage to increase the speed of problem handling, is an important issue for the automated assembly line.

[0005] Usually, the pedestrian passage in the production line is set between two buffer storage areas. During the buffer body transmission gap, the green light of the passage is on and pedestrians can pass; when the buffer body is being transmitted, the red light is on and pedestrians are prohibited from passing. This kind of passage has three technical characteristics:

[0006] 1. The pedestrian passage should be located between the two buffer storage areas. The transmission rhythm of the storage area should be slightly faster than the process rhythm of the production line to avoid the loss of transmission efficiency caused by pedestrians passing through, which will affect the efficiency of the production line.

[0007] 2. The line itself determines the time that pedestrians can pass through. In each transmission cycle, time is reserved for pedestrians to pass through, that is, the beat of each transmission cycle is fixed. During this period, if the buffer is ready to start transmission but there are still pedestrians passing through, the buffer will start again after the pedestrians leave.

[0008] 3. The line transmission form must be a split transmission. That is, after one car completes the transmission and vacates a parking space, the next car starts the transmission, and pedestrians are allowed to pass in the gap between the two cars;

[0009] See also Figure 1 Due to the characteristics of the Bestfit automatic assembly line, the above-mentioned manual channel solution will affect the operation efficiency of the line:

[0010] 1. Bestfit's 7 buffers are evenly distributed in the middle of the entire line. There is no continuous buffer to resist small downtime losses. If pedestrians pass through and affect the transmission start-up, it will directly affect the operating efficiency of the entire line;

[0011] 2. The existing solution requires a split transmission, but since the split transmission is inefficient, Bestfit's transmission is a linkage transmission, which does not leave a fixed time for pedestrians to pass through;

[0012] 3. When the linked transmission is started, all transmission rollers will be temporarily merged into a safety zone. Once a pedestrian mistakenly enters the pedestrian passage and triggers the safety sensor, the entire production line will be stopped for safety. Many equipments are involved, resulting in a long downtime recovery time.

[0013] In view of the above three reasons, the existing pedestrian passage form is difficult to meet the needs of Bestfit's fully automatic production line. Summary of the invention

[0014] The purpose of the present invention is to provide a pedestrian walking line method that is friendly to equipment operation efficiency and can effectively solve the problems existing in the background technology.

[0015] In order to solve the problems existing in the background technology, it is achieved through the following steps:

[0016] 1. The automatic door of the passage is controlled by a servo motor. When the line is in the automatic state, the automatic door is in the closed state, people cannot enter the passage directly, and the red light is always on;

[0017] 2. When a pedestrian needs to pass through, he presses the pass request button; after the PLC connected to the pass button receives the pedestrian's pass request, the station in front of the passage no longer triggers the departure signal;

[0018] 3. In the automatic state, when the PLC meets all the following conditions, the safety channel switches to the pedestrian release state:

[0019] ① The pedestrian makes a request to cross;

[0020] ②The light barrier does not detect the vehicle body passing;

[0021] ③ There is no departure signal at the workstation before the channel, and the roller bed motor is not in the starting state;

[0022] ④ The slide of the next station in the channel has an arrival signal, but the motor of the roller bed is not in the starting state;

[0023] 4. When the safety channel switches to the pedestrian release state, the following functions are triggered at the same time:

[0024] ① The safety block of the slide is raised to prevent the slide from entering the channel due to the failure of the roller bed motor, causing a safety accident;

[0025] ② The channel itself is designated as an independent safety zone. The front and rear workstations can continue automated production, but the front workstation cannot send vehicles into the safety zone;

[0026] ③ Shield the scanner in the channel;

[0027] ④ Activate the light barrier on the safety fence to prevent people from entering the line from the fence opening above the rolling bed. If someone enters the line, a safety emergency stop will be triggered immediately;

[0028] ⑤ The station light and channel indicator light switch to green to remind employees that they can enter the channel;

[0029] ⑥Servo motor controls the automatic door to open;

[0030] ⑦ Trigger the channel bell to remind people to pass quickly;

[0031] 5. After passing through, the personnel press the reset button to confirm that everyone has passed through the channel. After pressing the reset button, the scanner is activated to detect whether there are still pedestrians in the channel;

[0032] ① If there is still someone in the passage when the reset button is pressed, the reset will be automatically canceled and the safety passage will remain open;

[0033] ② If there is no one in the channel when the reset button is pressed, the equipment completes the reset, the servo motor controls the automatic door to close again, the green light switches to a steady red light, the bell stops, the line body safety zone switches back to the automatic production state, and normal vehicle transmission resumes;

[0034] 6. When the line is in non-automatic state, the red light switches to green, and the servo motor controls the automatic door to open and remain open.

[0035] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0036] 1. Production efficiency is the priority. While ensuring fast linkage and vehicle transfer, it allows pedestrians to quickly pass through the production line and respond to and handle equipment problems in the line;

[0037] 2. Ensure the safety of passers-by. When the passage is closed, the physical barrier of the automatic door that opens and closes automatically, the traffic light prompt, and the safety scanner ensure that people will not enter by mistake. When the passage is opened, the sled block and safety grating prevent the sled and people from entering other areas and causing safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0039] Figure 1 It is a structural schematic diagram of the background technology part of the present invention;

[0040] Figure 2 It is a flow chart of the technical solution in the present invention;

[0041] Figure 3 It is the safety zone before personnel enter in the present invention;

[0042] Figure 4 It is a control schematic diagram of the technical solution in the present invention;

[0043] Figure 5 It is a safe area for people to pass through in the present invention. DETAILED DESCRIPTION

[0044] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0045] See also Figure 2 This specific implementation method is implemented by adopting the following technical solution, which is implemented by the following steps:

[0046] 1. The automatic door of the passage is controlled by a servo motor. When the line is in the automatic state, the automatic door is in the closed state, and personnel cannot directly enter the passage. The red light is always on (see Figure 3 );

[0047] 2. When a pedestrian needs to pass through, he presses the pass request button; after the PLC connected to the pass button receives the pedestrian's pass request, the station in front of the passage no longer triggers the departure signal;

[0048] 3. In the automatic state, when the PLC meets all the following conditions, the safety channel switches to the pedestrian release state:

[0049] ① The pedestrian makes a request to cross;

[0050] ②The light barrier does not detect the vehicle body passing;

[0051] ③ There is no departure signal at the workstation before the channel, and the roller bed motor is not in the starting state;

[0052] ④ The slide of the next station in the channel has an arrival signal, but the motor of the roller bed is not in the starting state;

[0053] 4. When the safety channel switches to the pedestrian release state, the following functions are triggered at the same time:

[0054] ① The safety block of the slide is raised to prevent the slide from entering the channel due to the failure of the roller bed motor, causing a safety accident;

[0055] ② The channel itself is designated as an independent safety zone. The front and rear workstations can continue automated production, but the front workstation cannot send vehicles into the safety zone;

[0056] ③ Shield the scanner in the channel;

[0057] ④ Activate the light barrier on the safety fence to prevent people from entering the line from the fence opening above the rolling bed. If someone enters the line, a safety emergency stop will be triggered immediately;

[0058] ⑤ The station light and channel indicator light switch to green to remind employees that they can enter the channel;

[0059] ⑥Servo motor controls the automatic door to open;

[0060] ⑦ Trigger the channel bell to remind people to pass quickly (see Figure 4 );

[0061] 5. After passing through, the personnel press the reset button to confirm that everyone has passed through the channel. After pressing the reset button, the scanner is activated to detect whether there are still pedestrians in the channel;

[0062] ① If there is still someone in the passage when the reset button is pressed, the reset will be automatically canceled and the safety passage will remain open;

[0063] ② If there is no one in the channel when the reset button is pressed, the equipment completes the reset, the servo motor controls the automatic door to close again, the green light switches to a steady red light, the bell stops, the line body safety zone switches back to the automatic production state, and normal vehicle transmission resumes (see Figure 5 );

[0064] 6. When the line is in non-automatic state, the red light switches to green, and the servo motor controls the automatic door to open and remain open.

[0065] 7. The scanner is a sick scanner.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pedestrian walking line method that is friendly to equipment operation efficiency, characterized in that It is achieved through the following steps: 1). The automatic door of the passage is controlled by a servo motor. When the line is in the automatic state, the automatic door is in the closed state, and personnel cannot directly enter the passage. The red light is always on; 2). When a pedestrian needs to pass through, he presses the pass request button; after the PLC connected to the pass button receives the pedestrian's pass request, the station in front of the passage no longer triggers the departure signal; 3). In the automatic state, when the PLC meets all the following conditions, the safety channel switches to the pedestrian release state: ① The pedestrian makes a request to cross; ②The light barrier does not detect the vehicle body passing; ③ There is no departure signal at the workstation before the channel, and the roller bed motor is not in the starting state; ④ The slide of the next station in the channel has an arrival signal, but the motor of the roller bed is not in the starting state; 4). When the safety channel switches to the pedestrian release state, the following functions are triggered at the same time: ① The safety block of the slide is raised to prevent the slide from entering the channel due to the failure of the roller bed motor, causing a safety accident; ② The channel itself is designated as an independent safety zone. The front and rear workstations can continue automated production, but the front workstation cannot send vehicles into the safety zone; ③ Shield the scanner in the channel; ④ Activate the light barrier on the safety fence to prevent people from entering the line from the fence opening above the rolling bed. If someone enters the line, a safety emergency stop will be triggered immediately; ⑤ The station light and channel indicator light switch to green to remind employees that they can enter the channel; ⑥Servo motor controls the automatic door to open; ⑦ Trigger the channel bell to remind people to pass quickly; 5). After passing through, the personnel press the reset button to confirm that everyone has passed through the channel. After pressing the reset button, the scanner is activated to detect whether there are still pedestrians in the channel; If there is still someone in the passage when the reset button is pressed, the reset is automatically canceled and the safety passage remains open; ② If there is no one in the channel when the reset button is pressed, the equipment completes the reset, the servo motor controls the automatic door to close again, the green light switches to a steady red light, the bell stops, the line body safety zone switches back to the automatic production state, and normal vehicle transmission resumes; 6). When the line is in non-automatic state, the red light switches to green, and the servo motor controls the automatic door to open and remain open.

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