Logistics line intelligent ems trolley efficiency improving and energy saving system
By setting up EMS trolleys in parallel on a single-track transport line and optimizing movement commands using a PLC controller, the problem of low efficiency of EMS trolleys was solved, achieving efficient transportation and energy-saving effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- PRINX CHENGSHAN (SHANDONG) TIRE COMPANY LTD
- Filing Date
- 2024-02-02
- Publication Date
- 2026-05-12
AI Technical Summary
因厂房空间不足，EMS小车无法采用环形输送方式，导致双车单排单向输送效率低下，单车等待时间较长，降低了使用效率。
The first and second EMS trolleys are set up side by side on a single-track transport line, and their movement is controlled by a PLC controller. Specific movement instructions are issued according to the material calling station and the position of the trolley to optimize the material picking and transport path and reduce waiting time and walking distance.
It improves the transportation efficiency of EMS vehicles, reduces waiting time, and saves energy consumption.
Smart Images
Figure CN117735188B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of tire transportation technology, and specifically relates to an efficiency-improving and energy-saving system for intelligent EMS carts in logistics lines. Background Technology
[0002] Due to insufficient factory space, the EMS trolleys cannot use a circular conveyor system to deliver blanks; instead, a dual-trolley single-row unidirectional conveyor system is used. Currently, the material pick-up point of the single-track transport line is located at one end, resulting in low efficiency for the dual-trolley single-row unidirectional conveyor system, long waiting times for each trolley, and reduced overall utilization efficiency. Summary of the Invention
[0003] The purpose of this invention is to overcome the shortcomings of the above-mentioned technologies and provide an efficiency-enhancing and energy-saving system for intelligent EMS carts in logistics lines.
[0004] To address this, the present invention provides an efficiency-enhancing and energy-saving system for intelligent EMS carts in logistics lines, comprising a single-track transport line, on which a first EMS cart and a second EMS cart are arranged side-by-side in the transport direction. The first EMS cart is always located to one side of the second EMS cart. Multiple material calling stations are arranged below the single-track transport line. A gripping platform is located below the middle position of the single-track transport line, and a lifting platform is located to one side of the gripping platform. A tire blank transport platform is located to the higher side of the lifting platform. The system also includes a PLC controller for controlling the movement of the two EMS carts.
[0005] Furthermore, the PLC controller stores an instruction program used to execute the EMS trolley operation control method, including the following steps:
[0006] Obtain the sequence number of the material calling station and simultaneously obtain the current positions of the two EMS trolleys on the single-track transport line, which are respectively recorded as the first EMS trolley position and the second EMS trolley position. Issue specific movement instructions to the two EMS trolleys based on the first EMS trolley position, the second EMS trolley position, and the material calling station sequence number.
[0007] In one implementation, the movement instruction includes the following: when the material calling station makes a material call and both the material calling station and the two EMS trolleys are located on the same side, that is, both the material calling station and the two EMS trolleys are located on the left material calling station or both are located on the right material calling station, then the two EMS trolleys move to the other side simultaneously until the EMS trolley closer to the gripping platform when the material calling station makes a material call first gives up the position of the gripping platform, and then the EMS trolley farther away from the gripping platform when the material calling station makes a material call takes over the material and transports it.
[0008] In one implementation, the movement instruction includes selecting the EMS trolley located on the same side as the material calling station to pick up and transport materials when the material calling station is calling materials and the two EMS trolleys are located on opposite sides, i.e., the first EMS trolley is located at the material calling station on the left and the second EMS trolley is located at the material calling station on the right.
[0009] In one implementation, the movement instruction includes the following: when the material calling station calls for materials and the two EMS trolleys are located on the same side, the material calling station is located on the other side, that is, the material calling station is located on the left side and the two EMS trolleys are located on the right side, or the material calling station 5 is located on the right side and the two EMS trolleys are located on the left side, then the EMS trolley closer to the material calling station will pick up and transport the materials.
[0010] This invention provides an intelligent EMS cart efficiency improvement and energy-saving system for logistics lines, which has the following beneficial effects: it reduces the waiting time of dual-car operation and improves the transportation efficiency of EMS carts; at the same time, it saves energy because the travel distance of EMS carts is reduced. Attached Figure Description
[0011] Figure 1 This is a partial structural diagram of the crawling platform of the present invention;
[0012] Figure 2 This is a schematic diagram showing the positions of each structure in this invention;
[0013] The markings in the diagram are: 1. Tire blank transport platform, 2. Lifting platform, 3. Grabbing platform, 4. First EMS trolley, 5. Material calling station, 6. Single track transport line, 7. Second EMS trolley. Detailed Implementation
[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.
[0015] like Figure 1As shown in Figure 2, this invention provides an efficiency-enhancing and energy-saving system for intelligent EMS carts in logistics lines, including a single-track transport line 6. A first EMS cart 4 and a second EMS cart 7 are arranged side-by-side on the single-track transport line 6 in the transport direction. The first EMS cart 4 is always located to the left of the second EMS cart 7. Multiple material calling stations 5 are arranged below the single-track transport line 6. A gripping platform 3 is located below the middle position of the single-track transport line 6. A lifting platform 2 is located on one side of the gripping platform 3. A tire blank transport table 1 is located on the higher side of the lifting platform 2. The tire blank is transported from the tire blank to the lifting platform 2 via a conveyor belt, and then transported to the gripping platform 3 via the conveyor belt of the lifting platform 2. Finally, the EMS cart moves to the top of the gripping platform 3 and grips the tire blank with a gripper, moving it to the material calling station 5 for material calling.
[0016] The present invention also includes a PLC controller, which stores an instruction program for executing the EMS trolley operation control method, specifically including the following steps:
[0017] Obtain the sequence number of the material calling station 5, and simultaneously obtain the current positions of the two EMS trolleys on the single-track transport line 6, which are respectively recorded as the first EMS trolley position 4 and the second EMS trolley position 7. Based on the first EMS trolley position 4, the second EMS trolley position 7 and the sequence number of the material calling station 5, issue specific movement commands to the two EMS trolleys to control their movement.
[0018] In the transportation direction of the single-track transport line 6, sequential numbering is performed from one end to the other, and the number corresponding to each material calling station 5 is the material calling station 5 sequence number.
[0019] In this embodiment, the seven material calling stations 5 are used as an example for specific explanation.
[0020] Using the grabbing platform 3 as the boundary, the 7 material calling stations 5 are divided into the left material calling station and the right material calling station;
[0021] Example 1: When material calling station 5 calls for material and both material calling station 5 and the two EMS trolleys are located on the same side (i.e., both material calling station 5 and the two EMS trolleys are located on the left or right side of the material calling station), the two EMS trolleys simultaneously move to the other side until the EMS trolley closer to the gripping platform 3 when material calling station 5 calls for material yields the position of the gripping platform 3 first, and then the EMS trolley farther away from the gripping platform 3 when material calling station 5 calls for material takes over and transports the material. For example, when material calling station 5 calls for material, the first EMS trolley 4 is located at material calling station 5, and the second EMS trolley 7 is located at material calling station 5. Then both EMS trolleys simultaneously move to the right until the second EMS trolley 7 yields the position of the gripping platform 3, the first EMS trolley 4 takes over the gripping platform 3, and then transports the material to material calling station 5.
[0022] Example 2: When material is requested at the material request station 5 and the two EMS carts are located on opposite sides (i.e., the first EMS cart 4 is located at the left material request station and the second EMS cart 7 is located at the right material request station), the EMS cart located on the same side as the material request station 5 is selected for material retrieval and transport. For example, when material is requested at the third material request station 5, the first EMS cart 4 is located at the second material request station 5 and the second EMS cart 7 is located at the fifth material request station 5. In this case, the first EMS cart 4 moves to the right to the gripping platform 3 to retrieve the material and then transports it to the third material request station 5.
[0023] Example 3: When material calling station 5 calls for materials and the two EMS trolleys are located on the same side, if the material calling station 5 is located on the other side (i.e., the material calling station 5 is on the left and the two EMS trolleys are on the right), or if the material calling station 5 is on the right and the two EMS trolleys are on the left, then the EMS trolley closer to the material calling station 5 will pick up and transport the materials. For example, when material calling station 5 calls for materials, if the first EMS trolley 4 is located at material calling station 5 and the second EMS trolley 7 is located at material calling station 5, then the first EMS trolley 4 will move to the left to the gripping platform 3 to pick up the materials, and then move to the left again to material calling station 5 to transport the materials.
[0024] The applicable prerequisite for all of the above embodiments 1-3 is that the time interval between two consecutive material calls is greater than the movement cycle of the EMS trolley. The movement cycle is the time T required for the trolley to move from its current position at the time of material call to the time when the material is transported.
[0025] T = S1 / v +S2 / v +2t;
[0026] Where S1 is the distance between the trolley to be moved and the gripping platform 3, S2 is the distance between the gripping platform 3 and the material calling station 5, v is the moving speed of the trolley, and t is the time required for the EMS trolley to grip or place the tire blank.
[0027] It should be noted that if the time interval between two consecutive material requests is greater than the movement cycle of the EMS trolley, the EMS trolley that needs to transport materials due to the later material request can transport materials after the EMS trolley that needed to transport materials due to the previous material request has finished transporting materials. The two EMS trolleys do not conflict in their material transport time cycles. That is, when the EMS trolley that needs to transport materials due to the later material request needs to move, the EMS trolley that needed to transport materials due to the previous material request is stationary.
[0028] If the time interval between two consecutive material requests is less than the movement cycle of the EMS cart, meaning that when the EMS cart that needs to move due to the later material request needs to move, the EMS cart that needs to move due to the previous material request is already in motion, the movement paths of the two EMS carts may conflict. In this case, the following solution will be adopted:
[0029] Example 4: When both material calling stations 5 are located on the left side and both EMS trolleys are also located on the left side in two consecutive time calls, the second EMS trolley 7 moves to the right to make way for the gripping platform 3, so that the first EMS trolley 4 moves to the right to pick up the material and then moves to the left to transport the material to the material calling station 5 which is farther away from the gripping platform 3. Then the second EMS trolley 7 picks up the material and moves to the left to the material calling station 5 which is closer to the gripping platform 3. For example, the first EMS cart 4 is located at the second calling station 5, and the second EMS cart 7 is located at the third calling station 5. The first calling is at the third calling station 5, and the movement is carried out according to embodiment 1. During this process, the first calling station 5 calls again. Then, while the first EMS cart 4 is moving to the left to transport materials, the first EMS cart 4 moves to the left to the first calling station 5 to transport materials. Then the second EMS cart moves to the left to pick up materials and moves to the left to the third calling station 5 to transport materials.
[0030] Example 5: When both material calling stations 5 of two consecutive material calls are located at the right-hand material calling station and both EMS trolleys are also located at the right-hand side, the principle is the same as in Example 4.
[0031] Example 6: When two consecutive material calling stations 5 are both located on the left or right side, and two EMS trolleys are located on both sides, the EMS trolley on the same side as the material calling station 5 first picks up the material and transports it to the material calling station 5 that is farther away from the gripping platform 3. Then, the EMS trolley on a different side from the material calling station 5 picks up the material and transports it to the material calling station 5 that is closer to the gripping platform 3. For example, the first EMS trolley 4 is located at the second material calling station 5, the second EMS trolley 7 is located at the fifth material calling station 5, and the first material calling is at the third material calling station 5. In this case, the movement is performed according to Example 2. During this process, if the first material calling station 5 calls again, the first EMS trolley 4 is first moved to the right to pick up the material and then moved to the left to transport it to the first material calling station 5. Then, the second EMS trolley 7 is moved to the left to pick up the material and then moved to the left to transport it to the third material calling station 5.
[0032] Example 7: When two material calling stations 5 are located on opposite sides of each other in time, and two EMS carts are also located on opposite sides, the EMS cart that needs to transport material in the second call must wait for the EMS cart that transported material in the previous call to leave the gripping platform 3 before it can pick up and transport the material. For example, the first EMS cart 4 is located at the second material calling station 5, the second EMS cart 7 is located at the fifth material calling station 5, and the first material call is at the third material calling station 5. In this case, the movement is performed according to Example 2. During this process, if the sixth material calling station 5 calls again, the first EMS cart 4 is first moved to the right to pick up the material and then moved to the left to transport the material to the third material calling station 5. Then the second EMS cart 7 is moved to the left to pick up the material and then moved to the right to transport the material to the sixth material calling station 5.
[0033] Example 8: When two consecutive material calls occur at the same time, both material calling stations 5 are located at the left-hand material calling station, and both EMS carts are located at the right-hand material calling station. The first EMS cart 4 moves to the left to pick up the material and then moves to the left to transport it to the material calling station 5 further away from the gripping platform 3. The second EMS cart 7 moves to the left to pick up the material and then moves to the left to transport it to the material calling station 5 closer to the gripping platform 3. For example, if the first EMS cart is located at material calling station 5, the second EMS cart is located at material calling station 6, and the first material call is at material calling station 5, then the movement is performed as in Example 3. During this process, if material calling station 5 calls again, the first EMS cart 4 first moves to the left to pick up the material and then moves to the left to transport it to material calling station 5. Then, the second EMS cart 7 moves to the left to pick up the material and then moves to the left to transport it to material calling station 5.
[0034] Example 9: The principle is the same as in Example 8: when the two calling stations 5 of two consecutive time calls are both located at the right calling station and the two EMS trolleys are both located at the left calling station.
[0035] It should be noted that the principle followed by the problems solved in embodiments 4-9 is that when both material calling stations 5 are located on the left side, the first EMS trolley 4 prioritizes transporting materials to the material calling station 5 that is farther away from the gripping platform 3; when both material calling stations 5 are located on the right side, the second EMS trolley 7 prioritizes transporting materials to the material calling station 5 that is farther away from the gripping platform 3. This principle can avoid the defect that the second EMS trolley cannot reach the left side of the first EMS trolley due to the two EMS trolleys set up in parallel on the single track transport line 6, and is more reasonable.
[0036] To ensure the efficiency and continuity of material handling, the time interval between two consecutive material calls should be less than the movement cycle of the EMS trolley. Without affecting the movement paths of the two EMS trolleys, they should operate as simultaneously as possible. For example, in embodiment 8, while the first EMS trolley 4 is moving left to pick up material, when the second EMS trolley 7 calls again at the first material call station 5, it can begin moving left to the right side of the gripping station 5 to wait. After the first EMS trolley 4 has finished picking up material, the second EMS trolley 7 moves left to the gripping station 5 to pick up the material.
[0037] In the description of this invention, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0038] However, the above description is merely a specific embodiment of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of the present invention should still fall within the scope of the claims of the present invention.
Claims
1. A smart EMS (Electronic Material Handling) trolley system for a logistics line, comprising a single-track transport line, wherein a first EMS trolley and a second EMS trolley are arranged side-by-side on the single-track transport line in the transport direction, the first EMS trolley always being located to the left of the second EMS trolley, and multiple material calling stations are arranged below the single-track transport line, characterized in that, A gripping platform is set below the middle position of the single-track transport line, dividing the material calling station into a left-side and a right-side material calling station. A lifting platform is set on one side of the gripping platform, and a tire blank transport platform is set on the higher side of the lifting platform. It also includes a PLC controller, which is used to control the movement of the two EMS trolleys. The PLC controller stores an instruction program that executes the EMS trolley operation control method, including the following steps: Obtain the sequence number of the material calling station and simultaneously obtain the current positions of the two EMS trolleys on the single-track transport line, which are recorded as the first EMS trolley position and the second EMS trolley position, respectively. Issue specific movement instructions to the two EMS trolleys based on the first EMS trolley position, the second EMS trolley position and the material calling station sequence number. The movement command includes that when the material calling station makes a material call and both the material calling station and the two EMS trolleys are located on the same side, that is, both the material calling station and the two EMS trolleys are located on the left material calling station or both are located on the right material calling station, then the two EMS trolleys move to the other side at the same time until the EMS trolley closer to the grabbing platform when the material calling station makes a material call first gives up the position of the grabbing platform, and then the EMS trolley farther away from the grabbing platform when the material calling station makes a material call takes over the material and transports it. When a material calling station makes its first material call, and the EMS trolley, which is farther from the grabbing platform, picks up and transports the material, another material calling station makes a material call. At this time, both material calling stations are located on the left side of the material calling station, and both EMS trolleys are also located on the left side. Then, the second EMS trolley moves to the right to make way for the grabbing platform, allowing the first EMS trolley to move to the right to pick up the material and then move to the left to transport the material to the material calling station, which is farther from the grabbing platform. Then, the second EMS trolley picks up the material and moves to the left to the material calling station, which is closer to the grabbing platform.
2. The intelligent EMS cart system for logistics lines according to claim 1, characterized in that, The movement instructions include: when a material calling station makes a material call and the two EMS trolleys are located on opposite sides (i.e., the first EMS trolley is located at the left calling station and the second EMS trolley is located at the right calling station), the EMS trolley on the same side as the calling station is selected to pick up and transport the material; when a material calling station makes its first material call and the EMS trolley on the same side as the first calling station picks up and transports the material, and another material calling station makes a material call again, at which point both material calling stations are located on the left or right side and the two EMS trolleys are located on opposite sides, the EMS trolley on the same side as the calling station first picks up and transports the material to the calling station further away from the gripping platform, and then the EMS trolley on a different side picks up and transports the material to the calling station closer to the gripping platform.
3. The intelligent EMS cart system for logistics lines according to claim 1, characterized in that, The movement instructions include: when a material calling station makes a material call and the two EMS trolleys are located on opposite sides (i.e., the first EMS trolley is located on the left side of the material calling station and the second EMS trolley is located on the right side of the material calling station), the EMS trolley on the same side as the material calling station is selected to pick up and transport the material; when a material calling station makes its first material call and the EMS trolley on the same side as the first material calling station picks up and transports the material, and another material calling station makes a material call again, at which point the two material calling stations are located on opposite sides and the two EMS trolleys are also located on opposite sides, the EMS trolley that makes the second material call and needs to transport the material must wait for the EMS trolley that made the first material call and transport to leave the gripping platform before it picks up and transports the material.
4. The intelligent EMS cart system for logistics lines according to claim 1, characterized in that, The movement instructions include: when a material retrieval station makes a retrieval and two EMS trolleys are located on the same side, if the retrieval station is on the other side (i.e., the retrieval station is on the left and the two EMS trolleys are on the right), or vice versa, the EMS trolley closer to the retrieval station will pick up and transport the material; when a material retrieval station makes its first retrieval... When the EMS trolley closer to the original material call station picks up and transports the material, another material call station makes another material call. If both material call stations are located on the left and both EMS trolleys are located on the right, then the first EMS trolley moves to the left to pick up the material and transports it to the original material call station further away from the gripping platform. The second EMS trolley moves to the left to pick up the material and transports it to the original material call station closer to the gripping platform.