Tray lifting conveyor with high positioning detection precision
By using light curtain sensors in the pallet lift conveyor instead of the traditional dot-shaped linear photoelectric sensor, the problem of low positioning detection accuracy caused by the hollow structure is solved, the detection accuracy is improved and the safety of the conveyor is enhanced.
Patent Information
- Application Number
- CN202323627894.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2033-12-29
AI Technical Summary
Traditional dot-shaped linear photoelectric sensors are difficult to accurately detect the position of the tray because light passes through the hollow structure at the bottom of the tray, resulting in low positioning detection accuracy.
Use light curtain sensor instead of dot-shaped linear photoelectric sensors, and detect the position of the tray through the first light curtain sensor, reduce the possibility of light passing through the hollow structure, and judge the intrusion of the tray and the discharge end through the processor to ensure that Conveyor safety.
It improves the accuracy of pallet positioning detection, and enhances the safety of the conveyor to prevent foreign objects from intrusion and interrupts the conveying process.
Smart Images
Figure CN222330866U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of pallet conveying, and in particular to a pallet lifting conveyor with high positioning detection accuracy. Background Art
[0002] Pallets are common components used to place items. Pallets include wooden pallets, metal pallets, etc. After the goods are loaded on the pallet, AGV or manual forklift, in conjunction with the lifting conveyor, will move the pallet to a higher conveyor line for transportation into the warehouse.
[0003] In order to facilitate the detection and positioning of the pallet, and then to facilitate the linkage control of the various actuators of the lifting conveyor, the conveying head of the lifting conveyor is equipped with a position sensor. The traditional position sensor uses a point-shaped linear photoelectric sensor, and the bottom of the pallet usually has a hollow structure to ensure structural strength and reduce its own weight. When ordinary point-shaped linear photoelectric sensors detect the position of the pallet, the light will pass through the hollow structure, making it impossible to accurately detect the position of the pallet. Utility Model Content
[0004] In order to improve the positioning detection accuracy of the pallet, the present application provides a pallet lifting conveyor with high positioning detection accuracy.
[0005] The present application provides a pallet lifting conveyor with high positioning detection accuracy, which adopts the following technical solution:
[0006] A pallet lifting conveyor with high positioning detection accuracy comprises two brackets arranged in parallel in the horizontal direction, a lifting mechanism is provided on the side of the two brackets away from each other, rollers are rotatably arranged on the brackets, and a driving mechanism for driving the rollers to rotate is provided on the brackets, a first light curtain sensor emitting part is provided at the feeding end of one of the brackets, and a first light curtain sensor receiving part is provided at the feeding end of the other bracket, and the first light curtain sensor receiving part is arranged opposite to the first light curtain sensor emitting part.
[0007] By adopting the above technical solution, the dot-shaped linear photoelectric sensor includes a single-point or multi-point detection form, and the light curtain sensor can detect the entire area that needs to be shielded. As long as part of the light in this area is blocked, the position of the pallet can be located. The use of a light curtain sensor instead of a dot-shaped linear photoelectric sensor can reduce the possibility that all light in the covered detection area completely passes through the hollow structure at the bottom of the pallet, thereby improving the positioning detection accuracy of the pallet.
[0008] Optionally, a mounting frame is provided on opposite sides of the two brackets, the first light curtain sensor emitting part is detachably mounted on one of the mounting frames, and the first light curtain sensor receiving part is detachably mounted on the other mounting frame.
[0009] By adopting the above technical solution, it is convenient to overhaul, maintain or replace the first light curtain sensor transmitting part and the first light curtain sensor receiving part.
[0010] Optionally, the first light curtain sensor transmitting part and the first light curtain sensor receiving part are both installed on a corresponding mounting frame through a mounting plate, the mounting frame is provided with a mounting hole, the mounting plate is provided with a transverse adjustment elongated hole corresponding to the mounting hole, and the transverse adjustment elongated hole is arranged along the width direction of the bracket.
[0011] By adopting the above technical solution, the first light curtain sensor emitting part and the first light curtain sensor receiving part can be moved and adjusted along the width direction of the bracket by adjusting the long strip hole laterally, so as to facilitate the adjustment of the installation distance between the first light curtain sensor emitting part and the first light curtain sensor receiving part, thereby improving the installation flexibility of the first light curtain sensor emitting part and the first light curtain sensor receiving part.
[0012] Optionally, the mounting plate is arranged in an L-shape, and a longitudinal adjustment strip hole is provided on a right-angle side of the mounting plate away from the transverse adjustment strip hole, and the longitudinal adjustment strip hole is arranged along the length direction of the bracket.
[0013] By adopting the above technical solution, the first light curtain sensor emitting part and the first light curtain sensor receiving part can be moved and adjusted along the length direction of the bracket by longitudinally adjusting the long hole, so as to facilitate relative calibration of the installation positions of the first light curtain sensor emitting part and the first light curtain sensor receiving part.
[0014] Optionally, a convex groove is provided on one side of the first light curtain sensor transmitting part and the first light curtain sensor receiving part close to the longitudinal adjustment elongated hole on the corresponding mounting plate, and the convex groove is arranged along the vertical direction.
[0015] By adopting the above technical solution, through the setting of the convex groove, after the head of the bolt is inserted into the convex groove from the upper end or the lower end of the convex groove, the bolt can slide along the length direction of the convex groove, thereby facilitating the movement and adjustment of the first light curtain sensor transmitting part and the first light curtain sensor receiving part in the vertical direction, and facilitating further relative calibration of the installation positions of the first light curtain sensor transmitting part and the first light curtain sensor receiving part.
[0016] Optionally, a second light curtain sensor emitting unit is provided at the discharge end of one of the brackets, and a second light curtain sensor receiving unit is provided at the discharge end of the other bracket, and the second light curtain sensor receiving unit is arranged opposite to the second light curtain sensor emitting unit.
[0017] By adopting the above technical solution, the second light curtain sensor transmitting part and the second light curtain sensor receiving part can determine whether there is a person or foreign object intruding into the discharging end of the bracket, thereby improving the safety of the lifting conveyor.
[0018] Optionally, it also includes a processor, which is communicatively connected to the first light curtain sensor transmitting unit, the first light curtain sensor receiving unit, the second light curtain sensor transmitting unit, the second light curtain sensor receiving unit and the driving mechanism respectively.
[0019] By adopting the above technical solution, by combining the light emission and reception information of the first light curtain sensor emitting unit and the first light curtain sensor receiving unit, the processor determines whether there is a pallet passing through the feeding end of the bracket. At the same time, by combining the light emission and reception information of the second light curtain sensor emitting unit and the second light curtain sensor receiving unit, the processor determines whether there is a person or foreign object intrusion at the discharging end of the bracket. When it is determined that there is a pallet being conveyed on the bracket and a person or foreign object intrusion occurs, a signal is sent to the driving mechanism. After receiving the signal, the driving mechanism stops driving the rollers, thereby blocking the conveying process of the pallet, thereby ensuring the safety of the use of the lifting conveyor.
[0020] In summary, the present application includes at least one of the following beneficial technical effects:
[0021] 1. By setting the first light curtain sensor transmitting part and the first light curtain sensor receiving part, the light curtain sensor is used instead of the point-shaped linear photoelectric sensor, which can reduce the possibility that all light in the covered detection area completely passes through the hollow structure at the bottom of the pallet, thereby improving the positioning detection accuracy of the pallet.
[0022] 2. Through the setting of the convex groove, after the head of the bolt is inserted into the convex groove from the upper end or the lower end of the convex groove, the bolt can slide along the length direction of the convex groove, thereby facilitating the movement and adjustment of the first light curtain sensor transmitting part and the first light curtain sensor receiving part in the vertical direction, and facilitating further relative calibration of the installation positions of the first light curtain sensor transmitting part and the first light curtain sensor receiving part.
[0023] 3. Through the arrangement of the second light curtain sensor transmitting part and the second light curtain sensor receiving part, it is possible to determine whether there is human or foreign matter intrusion at the discharging end of the bracket, thereby improving the safety of the lifting conveyor. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a schematic diagram of the overall structure of a pallet lifting conveyor with high positioning detection accuracy in an embodiment of the present application.
[0025] Figure 2 It is a schematic diagram of the structure of the mounting holes and the transverse adjustment strip holes in the embodiment of the present application.
[0026] Figure 3 It is a schematic diagram of the structure of the transversely adjustable elongated holes and convex grooves in the embodiment of the present application.
[0027] Figure 4It is a schematic diagram of a processor in an embodiment of the present application.
[0028] Explanation of the reference numerals: 1. bracket; 11. roller; 2. lifting mechanism; 3. driving mechanism; 4. first light curtain sensor emitting part; 41. convex groove; 5. first light curtain sensor receiving part; 6. mounting frame; 61. mounting plate; 611. transverse adjustment long hole; 612. longitudinal adjustment long hole; 62. mounting hole; 7. second light curtain sensor emitting part; 8. second light curtain sensor receiving part; 9. processor. DETAILED DESCRIPTION
[0029] The following is combined with Figure 1-4 , further details of this application are given.
[0030] The present application embodiment discloses a pallet lifting conveyor with high positioning detection accuracy. Figure 2 A pallet lifting conveyor with high positioning detection accuracy includes two brackets 1 arranged in parallel in the horizontal direction, a lifting mechanism 2 is provided on the side of the two brackets 1 away from each other, a roller 11 is rotatably provided on the bracket 1, the axial direction of the roller 11 is the same as the width direction of the bracket 1 and a plurality of rollers 11 are arranged in a straight line along the length direction of the bracket 1, and a driving mechanism 3 for driving the roller 11 to rotate is provided on the bracket 1.
[0031] When in use, the lifting conveyor is installed at the entrance end of the storage conveyor line, and after the corresponding bracket 1 is driven down to a certain height by the lifting mechanism 2, the manual forklift or AGV trolley carrying the pallet places the pallet on the roller 11. The driving mechanism 3 is started to drive the roller 11 to rotate, and the rotation of the roller 11 can drive the pallet to move toward the entrance conveyor line; at the same time, the corresponding bracket 1 can be driven upward by the lifting mechanism 2, so that the height of the roller 11 is consistent with the height of the storage conveyor line, so as to facilitate the transfer of the pallet from the lifting conveyor to the storage conveyor line.
[0032] Reference Figure 1 , a first light curtain sensor transmitting part 4 is installed at the feeding end of one bracket 1, and a first light curtain sensor receiving part 5 is installed at the feeding end of the other bracket 1, and the first light curtain sensor receiving part 5 is arranged opposite to the first light curtain sensor transmitting part 4. Since the point-shaped linear photoelectric sensor includes a single-point or multi-point detection form, and the light curtain sensor can detect the entire area that needs to be shielded, as long as a part of the light in the area is blocked, the position of the pallet can be located. Using a light curtain sensor instead of a point-shaped linear photoelectric sensor can reduce the possibility that all light in the covered detection area completely passes through the hollow structure at the bottom of the pallet, thereby improving the positioning detection accuracy of the pallet.
[0033] Reference Figure 1 and Figure 2In order to facilitate the inspection, maintenance or replacement of the first light curtain sensor emitting part 4 and the first light curtain sensor receiving part 5, a mounting frame 6 is fixed on the opposite sides of the two brackets 1, the first light curtain sensor emitting part 4 is detachably mounted on one side of the mounting frame 6, and the first light curtain sensor receiving part 5 is detachably mounted on the other side of the mounting frame 6.
[0034] Reference Figure 1-3 The first light curtain sensor transmitting part 4 and the first light curtain sensor receiving part 5 are both installed on the corresponding mounting frame 6 through the mounting plate 61. The mounting plate 61 is L-shaped, and a mounting hole 62 is provided on the mounting frame 6. A transverse adjustment strip hole 611 corresponding to the first mounting hole 62 is provided on one of the right-angled sides of the mounting plate 61, and the transverse adjustment strip hole 611 is arranged along the width direction of the bracket 1; a longitudinal adjustment strip hole 612 is provided on the other right-angled side of the mounting plate 61, and the longitudinal adjustment strip hole 612 is arranged along the length direction of the bracket 1.
[0035] When installing the first light curtain sensor emitting part 4 and the first light curtain sensor receiving part 5, the first light curtain sensor emitting part 4 and the first light curtain sensor receiving part 5 can be moved and adjusted along the width direction of the bracket 1 by adjusting the long hole 611 laterally, so as to adjust the installation distance between the first light curtain sensor emitting part 4 and the first light curtain sensor receiving part 5, thereby improving the installation flexibility of the first light curtain sensor emitting part 4 and the first light curtain sensor receiving part 5; the first light curtain sensor emitting part 4 and the first light curtain sensor receiving part 5 can be moved and adjusted along the length direction of the bracket 1 by adjusting the long hole 612 longitudinally, so as to relatively calibrate the installation positions of the first light curtain sensor emitting part 4 and the first light curtain sensor receiving part 5.
[0036] Reference Figure 1-3 , a convex groove 41 is provided on one side of the first light curtain sensor emitting part 4 and the first light curtain sensor receiving part 5 close to the longitudinal adjustment long strip hole 612 on the corresponding mounting plate 61, and the convex groove 41 is arranged along the vertical direction. In this way, after the head of the bolt used to fasten the mounting plate 61 and the first light curtain sensor emitting part 4 or the first light curtain sensor receiving part 5 is inserted into the convex groove 41 from the upper end or the lower end of the convex groove 41, the bolt can slide along the length direction of the convex groove 41, so as to facilitate the movement and adjustment of the first light curtain sensor emitting part 4 and the first light curtain sensor receiving part 5 in the vertical direction, and facilitate further relative calibration of the installation positions of the first light curtain sensor emitting part 4 and the first light curtain sensor receiving part 5.
[0037] Reference Figure 1 and Figure 4, a second light curtain sensor transmitter 7 is installed at the discharge end of one of the brackets 1, and a second light curtain sensor receiver 8 is installed at the discharge end of the other bracket 1, and the second light curtain sensor receiver 8 is arranged opposite to the second light curtain sensor transmitter 7. The pallet lifting conveyor also includes a processor 9, and the processor 9 is respectively connected to the first light curtain sensor transmitter 4, the first light curtain sensor receiver 5, the second light curtain sensor transmitter 7, the second light curtain sensor receiver 8 and the drive mechanism 3. In this way, by combining the light emission and reception information of the first light curtain sensor transmitter 4 and the first light curtain sensor receiver 5, the processor 9 determines whether there is a pallet passing through the feed end of the bracket 1. At the same time, by combining the light emission and reception information of the second light curtain sensor transmitter 7 and the second light curtain sensor receiver 8, the processor 9 determines whether there is a person or foreign object intrusion at the discharge end of the bracket 1. When it is determined that there is a pallet on the bracket 1 and a person or foreign object intrusion occurs, a signal is sent to the drive mechanism 3. After receiving the signal, the drive mechanism 3 stops driving the roller 11, thereby blocking the conveying process of the pallet, thereby ensuring the safety of the lifting conveyor.
[0038] The implementation principle of a pallet lifting conveyor with high positioning detection accuracy in the embodiment of the present application is as follows: when in use, the lifting conveyor is installed at the entrance end of the storage conveyor line, and after the corresponding bracket 1 is driven to a certain height by the lifting mechanism 2, the manual forklift or AGV trolley carrying the pallet places the pallet on the roller 11. The driving mechanism 3 is started to drive the roller 11 to rotate, and the rotation of the roller 11 can drive the pallet to move toward the entrance conveyor line; at the same time, the corresponding bracket 1 can be driven to move upward by the lifting mechanism 2, so that the height of the roller 11 is consistent with the height of the storage conveyor line, thereby facilitating the transfer of the pallet from the lifting conveyor to the storage conveyor line.
[0039] The lifting conveyor can detect the entire area to be shielded by setting the first light curtain sensor transmitting part 4 and the first light curtain sensor receiving part 5. As long as part of the light in the area is blocked, the position of the pallet can be located. The use of light curtain sensors instead of point-shaped and linear photoelectric sensors can reduce the possibility that all light in the covered detection area completely passes through the hollow structure at the bottom of the pallet, thereby improving the positioning detection accuracy of the pallet.
[0040] In addition, by combining the light emission and reception information of the first light curtain sensor emitting unit 4 and the first light curtain sensor receiving unit 5, the processor 9 determines whether there is a pallet passing through the feeding end of the bracket 1. At the same time, by combining the light emission and reception information of the second light curtain sensor emitting unit 7 and the second light curtain sensor receiving unit 8, the processor 9 determines whether there is a person or foreign object intrusion at the discharging end of the bracket 1. When it is determined that there is a pallet being conveyed on the bracket 1 and a person or foreign object intrusion occurs, a signal is sent to the driving mechanism 3. After receiving the signal, the driving mechanism 3 stops driving the roller 11, thereby blocking the conveying process of the pallet, thereby ensuring the safety of the use of the lifting conveyor.
[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A pallet lifting conveyor with high positioning detection accuracy, characterized in that: The invention comprises two brackets (1) arranged in parallel in a horizontal direction, a lifting mechanism (2) being arranged on the side of the two brackets (1) away from each other, a roller (11) being rotatably arranged on the bracket (1), and a driving mechanism (3) for driving the roller (11) to rotate being arranged on the bracket (1), a first light curtain sensor transmitting part (4) being arranged at the feeding end of one of the brackets (1), and a first light curtain sensor receiving part (5) being arranged at the feeding end of the other bracket (1), and the first light curtain sensor receiving part (5) being arranged opposite to the first light curtain sensor transmitting part (4).
2. The pallet lifting conveyor with high positioning detection accuracy according to claim 1 is characterized in that: A mounting frame (6) is provided on the opposite side of the two brackets (1); the first light curtain sensor emitting part (4) is detachably mounted on one of the mounting frames (6); and the first light curtain sensor receiving part (5) is detachably mounted on the other mounting frame (6).
3. The pallet lifting conveyor with high positioning detection accuracy according to claim 2 is characterized in that: The first light curtain sensor transmitting part (4) and the first light curtain sensor receiving part (5) are both mounted on a corresponding mounting frame (6) via a mounting plate (61); the mounting frame (6) is provided with a mounting hole (62); the mounting plate (61) is provided with a transverse adjustment strip hole (611) corresponding to the mounting hole (62); the transverse adjustment strip hole (611) is arranged along the width direction of the bracket (1).
4. The pallet lifting conveyor with high positioning detection accuracy according to claim 3 is characterized in that: The mounting plate (61) is arranged in an L-shape, and a longitudinal adjustment strip hole (612) is provided on a right-angled side of the mounting plate (61) away from the transverse adjustment strip hole (611), and the longitudinal adjustment strip hole (612) is arranged along the length direction of the bracket (1).
5. The pallet lifting conveyor with high positioning detection accuracy according to claim 4, characterized in that: The first light curtain sensor transmitting part (4) and the first light curtain sensor receiving part (5) are provided with a convex groove (41) on one side close to the longitudinal adjustment elongated hole (612) on the corresponding mounting plate (61), and the convex groove (41) is arranged along the vertical direction.
6. The pallet lifting conveyor with high positioning detection accuracy according to claim 1, characterized in that: A second light curtain sensor emitting part (7) is provided at the discharge end of one of the brackets (1), and a second light curtain sensor receiving part (8) is provided at the discharge end of the other bracket (1), and the second light curtain sensor receiving part (8) is arranged opposite to the second light curtain sensor emitting part (7).