Novel photovoltaic module battery string automatic typesetting device
By combining a photovoltaic module glass transmission line, a battery string connection transmission line, a visual positioning component, and a rotating string suction mechanism, the compatibility issues of existing photovoltaic module layout machines have been resolved, enabling efficient battery string placement and improving the flexibility and capacity of the production line.
Patent Information
- Application Number
- CN202421693421.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-07-17
AI Technical Summary
Existing photovoltaic module layout machines lack flexibility and compatibility, making it difficult to adapt to string welding machines from different manufacturers. Their production cycle efficiency and precision are insufficient, failing to meet the demands of high-speed automated production.
It employs a photovoltaic module glass transmission line, a battery string splicing transmission line, a vision positioning component, a rotary string suction mechanism, and a battery string lateral movement mechanism to achieve precise positioning and movement of battery strings. It supports the docking of string welding machines from different manufacturers and ensures positioning accuracy through a CCD industrial camera.
It improves the flexibility and compatibility of the production line and the production cycle time, increases capacity, avoids wasted time due to uncoordinated movements, and ensures the precise placement of battery strings.
Smart Images

Figure CN223488663U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a novel automatic photovoltaic module cell string arrangement device and a photovoltaic automated production line. Background Art
[0002] Currently, with the development of the photovoltaic industry, the automation level of photovoltaic production lines is getting higher and higher, and the capacity requirements are getting larger and larger. It is necessary to connect with multiple front-end string welding machines in the industry, and high-speed layout machines that can meet the requirements of high-speed automated layout have become a rigid demand in the photovoltaic module industry.
[0003] The existing typesetting machines on photovoltaic production lines are generally designed for string welding machines from fixed manufacturers (pre-processing), and the receiving platform is fixed, lacking the necessary adaptability and compatibility. The typesetting mechanism also mostly uses robotic arms as the power components for handling, or uses rack and pinion gears to power the robotic arms, or uses synchronous pulleys and linear guides as the power mechanism for handling.
[0004] In summary, the existing technical approach and current status of typesetting machines have failed to adequately meet the overall requirements of production line flexibility, compatibility, speed, and efficiency improvement. With the continuous iteration of high-speed string welding machines and the significant increase in production capacity, the design concept and stringing power of typesetting machines also need further optimization and acceleration. Utility Model Content
[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a new type of automatic photovoltaic module cell string arrangement device, which solves the compatibility and docking problem of the string welding machine in the front process of the photovoltaic module arrangement machine, and greatly improves the production cycle of the production line and increases the production capacity while meeting the string arrangement accuracy.
[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:
[0007] A novel automatic photovoltaic module cell string arrangement device includes a photovoltaic module glass transmission line, a first cell string receiving transmission line, a visual positioning component, a second cell string receiving transmission line, a rotary string suction mechanism, and a cell string lateral movement mechanism.
[0008] The photovoltaic module glass transmission line is used to receive the photovoltaic module glass from the previous production line and transmit the photovoltaic module glass to the designated location.
[0009] The first battery string material transmission line and the second battery string material transmission line are respectively used to transport the completed battery strings to the corresponding battery string picking positions.
[0010] The visual positioning component is used to take pictures of the corners of the battery string at the battery string picking position and send the positioning coordinate information of the battery string to the battery string traversing mechanism.
[0011] The rotating suction mechanism is connected to the battery string transverse mechanism. The rotating suction mechanism is used to attract and rotate the battery strings at the battery string picking position, and the battery string transverse mechanism is used to drive the rotating suction mechanism to move.
[0012] Furthermore, the photovoltaic module glass transmission line includes a glass conveying motor, a drive shaft, a glass conveying drive wheel, a guide bar, and a glass conveying driven wheel. The drive shaft is connected to the motor shaft of the glass conveying motor. The glass conveying drive wheel is fixed on the drive shaft. The glass conveying drive wheel is connected to the glass conveying driven wheel via the guide bar. The guide bar is used to convey the photovoltaic module glass.
[0013] Furthermore, a straightening mechanism is provided around the photovoltaic module glass transmission line, the straightening mechanism including an X-axis straightening component, a Y-axis straightening component and a front blocking component;
[0014] The X-axis alignment component includes an X-axis moving component, an X-axis mounting plate, and an alignment cylinder. The X-axis mounting plate is connected to the X-axis moving component, and the alignment cylinder is fixed on the X-axis mounting plate. An alignment wheel is provided on the piston rod of the alignment cylinder.
[0015] The Y-axis alignment component includes a Y-axis moving component and a Y-axis mounting plate. The Y-axis mounting plate is connected to the Y-axis moving component, and an alignment wheel is provided on the Y-axis mounting plate.
[0016] The front blocking assembly includes a blocking cylinder, on which a centering wheel is mounted, and the blocking cylinder is located on the side of the glass transport drive wheel.
[0017] Furthermore, both the X-axis movement component and the Y-axis movement component are linear modules.
[0018] Furthermore, the first battery series material transmission line and the second battery series material transmission line have the same structure. The first battery series material transmission line includes a belt transmission component and a belt line moving component. The belt transmission component is connected to the belt line moving component, and the belt line moving component drives the belt transmission component to move.
[0019] Furthermore, the belt transmission assembly includes a crossbeam, a main beam, a belt motor, a first driving pulley, a first driven pulley, a transmission shaft, a second driving pulley, a second driven pulley, a tensioning vertical plate, a tensioning horizontal plate, and a belt;
[0020] The two main beams are connected by several crossbeams, and each end of the main beam is provided with a second driven wheel;
[0021] The belt conveyor motor is connected to the crossbeam. The first driving wheel is fixed on the motor shaft of the belt conveyor motor. The first driving wheel is connected to the first driven wheel via a belt. The first driven wheel is fixed on the drive shaft. The two ends of the drive shaft are respectively fixed with second driving wheels. The tensioning plate is connected to the main beam. The two tensioning plates are connected by a tensioning cross plate. The drive shaft is rotatably connected to the tensioning plate.
[0022] The belt is connected to the second driving wheel and the second driven wheels at both ends of the main beam.
[0023] Furthermore, a pair of tensioning wheels for tensioning the belt are provided above the second drive wheel, and the tensioning wheels are fixed to the tensioning plate.
[0024] Furthermore, the visual positioning component includes a front positioning camera mechanism for the battery string and a rear positioning camera mechanism for the battery string. The front positioning camera mechanism is used to take pictures and position the front corners of the battery string, and the rear positioning camera mechanism is used to take pictures and position the rear corners of the battery string.
[0025] Furthermore, the battery string lateral movement mechanism is a linear module.
[0026] Furthermore, it also includes a battery string NG box for holding NG battery strings.
[0027] By adopting the above technical solution, this utility model has the following beneficial effects:
[0028] 1. This utility model uses two sets of movable battery stringing material transmission lines, which can be connected to stringing machines from different manufacturers. Even when the stringing spacing of the stringing machines is different, they can still be perfectly connected.
[0029] 2. This utility model adopts two sets of battery string connection transmission lines and two sets of battery string picking positions for dual-station waiting and picking, which can better coordinate the timing of string output and string placement of the string welding machine, and avoid the situation of uncoordinated actions and wasted time.
[0030] 3. This utility model is equipped with a battery string NG material box, which can centrally store the NG battery strings produced by the string welding machine. It can buffer multiple NG string materials, avoiding the impact of frequent handling of NG strings by operators on the overall production cycle of the equipment. Retrieving NG string materials does not affect the production cycle of the equipment.
[0031] 4. This utility model uses a CCD industrial camera to position the battery string, ensuring the accuracy of material picking and string placement. Attached Figure Description
[0032] Figure 1 This is a front view of a novel automatic photovoltaic module cell string arrangement device according to the present invention;
[0033] Figure 2 This is a schematic diagram of the photovoltaic module glass transmission line and the conditioning mechanism of this utility model;
[0034] Figure 3 This is a schematic diagram of the structure of the photovoltaic module glass transmission line of this utility model;
[0035] Figure 4 This is a schematic diagram of the Y-axis alignment component of this utility model;
[0036] Figure 5 This is a schematic diagram of the X-axis alignment component of this utility model;
[0037] Figure 6 This is a schematic diagram of the structure of the first battery string connection transmission line and the first battery string picking position of this utility model;
[0038] Figure 7 This is a schematic diagram of the structure of the belt conveyor assembly of this utility model;
[0039] Figure 8 for Figure 7 A magnified view of a portion of the image;
[0040] Figure 9 This is a schematic diagram of the structure of the first battery string feeding position and the second battery string feeding position of this utility model;
[0041] Figure 10 This is a schematic diagram of the structure of the visual positioning component of this utility model;
[0042] Figure 11 This is a schematic diagram of the rotating suction string mechanism and the battery string transverse movement mechanism of this utility model;
[0043] Figure 12 This is a schematic diagram of the rotating suction and stringing mechanism of this utility model. DETAILED DESCRIPTION
[0044] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.
[0045] like Figure 1 As shown in the figure, this embodiment provides a novel automatic photovoltaic module cell string arrangement device, which includes a photovoltaic module glass transmission line 1, a first cell string receiving transmission line 2, a visual positioning component, a second cell string receiving transmission line 4, a rotary string suction mechanism 6, and a cell string lateral movement mechanism 7.
[0046] The photovoltaic module glass transport line 1 connects to the upstream production line, receiving the photovoltaic module glass from the upstream production line and transporting it to its designated position. Once in place, the photovoltaic glass is aligned using a aligning mechanism arranged around the photovoltaic module glass transport line 1. After alignment, it awaits the adsorption of the battery strings.
[0047] The first battery string connection conveyor line 2 and the second battery string connection conveyor line 4 on both sides are used for receiving and conveying battery strings. They can move in the Y-axis direction to achieve precise docking and feeding of the two output ports of the string welding machine, and to receive the completed battery strings. The battery string connection conveyor lines on both sides not only correspond to the two output ports of the string welding machine, but can also move and adjust their positions in the Y-axis direction. The first battery string connection conveyor line 2 and the second battery string connection conveyor line 4 transport the battery strings to the corresponding first battery string picking positions 51 and 52, which can further shorten the cycle time.
[0048] A visual positioning component is set on each of the left and right sides to photograph and locate the corners of the battery strings at the first battery string picking position 51 and the second battery string picking position 52, and send the positioning coordinate information of the battery strings to the battery string traversing mechanism 7. Figure 1 , 10 As shown, the visual positioning component includes a front positioning camera mechanism 31 and a rear positioning camera mechanism 32 for the battery string. When the battery string at the first battery string picking position 51 and the second battery string picking position 52 is transferred to the correct position, the front positioning camera mechanism 31 takes a picture of the front corner of the battery string for positioning, and the rear positioning camera mechanism 32 takes a picture of the rear corner of the battery string for positioning.
[0049] The rotary suction mechanism 6 is connected to the battery string traversing mechanism 7. The rotary suction mechanism 6 is used to attract and rotate the battery strings on the first battery string picking position 51 and the second battery string picking position 52. The battery string traversing mechanism 7 is used to drive the rotary suction mechanism 6 to move in the Y-axis direction. The battery string traversing mechanism 7 adopts a linear module to precisely move the rotary suction mechanism 6 above the battery string. Then, the rotary suction mechanism 6 descends, and the battery string comes into contact with the suction cups of the rotary suction mechanism 6. At this time, the vacuum generator is turned on to start the vacuuming action until the vacuum threshold is met and the battery string is firmly attracted. After the vacuum threshold is established, the rotary suction mechanism 6 rises, raising the entire battery string to the set height.
[0050] The battery string, raised to a set height, remains in a vacuum adsorption state. The battery string lateral movement mechanism 7 moves the battery string above the properly aligned photovoltaic module glass, which is placed on the photovoltaic module glass transmission line 1. During the movement of the vacuum-adsorbed battery string along the Y-axis, the rotating adsorption mechanism 6 rotates the entire battery string 90°. After rotation, the rotating adsorption mechanism 6 lowers the battery string to the predetermined placement position on the photovoltaic module glass, breaks the vacuum, and leaves the entire battery string on the module glass.
[0051] After the two sets of battery strings are completely placed, the photovoltaic module glass transmission line 1 starts the fixed-distance forward mode, moving the photovoltaic module glass and battery strings as a whole to the position where the next set of battery strings needs to be placed.
[0052] Then, the rotating suction mechanism 6 rises and continues to pick up and place battery strings on the first battery string picking position 4 and the second battery string picking position 5, and the photovoltaic module glass transmission line 1 moves a certain distance. This continues until all 12 battery strings on the photovoltaic module glass are placed.
[0053] Finally, the organizing mechanism and barriers are opened, and the photovoltaic module glass transmission line 1 transports the arranged photovoltaic module glass and battery strings as a whole to the next process.
[0054] This completes the process of placing 12 or a predetermined number of battery strings on the glass of a photovoltaic module.
[0055] like Figure 2 , 3 As shown, the photovoltaic module glass transport line 1 in this embodiment includes a glass transport motor 11, a drive shaft 12, a glass transport drive wheel 13, a guide bar 14, and a glass transport driven wheel 15. The drive shaft 12 is connected to the motor shaft of the glass transport motor 11. The glass transport drive wheel 13 is fixed on the drive shaft 12, and the glass transport drive wheel 13 is connected to the glass transport driven wheel 15 via the guide bar 14. The glass transport motor 11 drives the glass transport drive wheel 13 to rotate, and the glass transport drive wheel 13 drives the glass transport driven wheel 15 to rotate via the guide bar 14. A cover is installed on the outer periphery of the glass transport driven wheel 15, and the shaft of the glass transport driven wheel 15 is fixed on the cover. Finally, the photovoltaic module glass is transported via the guide bar 14.
[0056] like Figure 2 , 4 As shown in Figure 5, the alignment mechanism in this embodiment includes an X-axis alignment component 81, a Y-axis alignment component 82, and a front blocking component.
[0057] The X-axis alignment assembly 81 includes an X-axis moving assembly 85, an X-axis mounting plate 87, and an alignment cylinder 84. The X-axis mounting plate 87 is connected to the X-axis moving assembly 85, and the alignment cylinder 84 is fixed on the X-axis mounting plate 87. An alignment wheel 83 is provided on the piston rod of the alignment cylinder 84.
[0058] The Y-axis alignment component 82 includes a Y-axis moving component 86 and a Y-axis mounting plate 89. The Y-axis mounting plate 89 is connected to the Y-axis moving component 86, and an alignment wheel 83 is provided on the Y-axis mounting plate 89.
[0059] The front blocking assembly includes a blocking cylinder 88, on which a return wheel 83 is provided. The blocking cylinder 88 is located on the side wall of the housing of the glass transport drive wheel 13.
[0060] Both the X-axis moving component 85 and the Y-axis moving component 86 are linear modules.
[0061] During alignment, the blocking cylinder 88 extends its upper alignment wheel 83 to block one side of the photovoltaic module glass in the X-axis direction. Simultaneously, the alignment cylinder 84 on the X-axis moving assembly 85 extends its upper alignment wheel 83, which then presses the other side of the photovoltaic module glass in the X-axis direction. At the same time, the two sets of Y-axis moving assemblies 86 drive the alignment wheel 83 to press both sides of the photovoltaic module glass in the Y-axis direction, thereby achieving alignment. After the battery strings on the photovoltaic module glass are placed, the blocking cylinder 88 retracts its upper alignment wheel 83 to allow the photovoltaic module glass and battery strings to enter the next process.
[0062] like Figure 6 As shown, the first battery string connection transmission line 2 and the second battery string connection transmission line 4 in this embodiment have the same structure. The first battery string connection transmission line 2 includes a belt transmission assembly and a belt line moving assembly 205. The belt transmission assembly is connected to the belt line moving assembly 205. The belt line moving assembly 205 drives the belt transmission assembly to move, thereby docking with the first battery string picking position 51. Figure 9 As shown, the structure of the first battery string picking position 51 and the second battery string picking position 52 is the same as that of the belt conveyor assembly.
[0063] like Figure 7 , 8 As shown, the belt conveyor assembly in this embodiment includes a crossbeam 21, a main beam 22, a belt motor 23, a first driving wheel 24, a first driven wheel 25, a transmission shaft 26, a second driving wheel 27, a second driven wheel 28, a tensioning vertical plate 29, a tensioning horizontal plate 201, and a belt 202.
[0064] The two main beams 22 are connected by several crossbeams 21, and the two ends of the main beams 22 are respectively provided with second driven wheels 28;
[0065] The belt-driven motor 23 is connected to the crossbeam 21. The first driving wheel 24 is fixed on the motor shaft of the belt-driven motor 23. The first driving wheel 24 is connected to the first driven wheel 25 through the ring belt 204. The first driven wheel 25 is fixed on the transmission shaft 26. The two ends of the transmission shaft 26 are respectively fixed with the second driving wheel 27. The tensioning plate 29 is connected to the main beam 22. The two tensioning plates 29 are connected through the tensioning cross plate 201. The transmission shaft 26 is rotatably connected to the tensioning plate 29.
[0066] The belt 202 is connected to the second driving wheel 27 and the second driven wheels 28 at both ends of the main beam 22. A pair of tensioning wheels 203 for tensioning the belt 202 are provided above the second driving wheel 27. The tensioning wheels 203 are fixed on the tensioning plate 29.
[0067] The belt motor 23 drives the first driven wheel 25 to rotate via the ring belt 204. The first driven wheel 25 drives the transmission shaft 26 to rotate. The transmission shaft 26 drives the two second driving wheels 27 to rotate. The second driving wheels 27 drive the second driven wheels 28 to rotate via the belt 202. The belt 202 transports the battery string.
[0068] The two main beams 22 of the belt conveyor assembly are fixed to the belt conveyor moving assembly 205. The belt conveyor moving assembly 205 is a linear module that can drive the belt conveyor assembly to move in the Y-axis direction, thereby enabling the belt conveyor assembly to dock with the first battery string picking position 51. The working principle of the second battery string receiving conveyor line 4 and the second battery string picking position 52 is the same.
[0069] like Figure 11 As shown, the battery string lateral movement mechanism 7 in this embodiment is a linear module. The rotating suction mechanism 6 is connected to the battery string lateral movement mechanism 7, and the rotating suction mechanism 6 is driven by the battery string lateral movement mechanism 7 to reciprocate in the Y-axis direction.
[0070] like Figure 12 As shown, the rotating suction assembly 6 includes a moving component 61 and a rotating suction component. The moving component 61 is a linear module that drives the rotating suction component to move up and down. The rotating suction component includes a rotating power device 621, a suction beam 622, and vacuum suction heads 623. The rotating power device 621 is connected to the moving component 61 via a bracket and can be a motor. The suction beam 622 is connected to the rotating power device 621 and is driven to rotate by the rotating power device 621. Several vacuum suction heads 623 are evenly fixed at the bottom of the suction beam 622 and are used to pick up the battery strings.
[0071] like Figure 1 , 6 As shown, this embodiment also includes a battery string NG material box 9, which is used to hold NG battery strings.
[0072] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A novel automatic photovoltaic module cell string arrangement device, characterized in that: It includes a photovoltaic module glass transmission line (1), a first battery string connection transmission line (2), a vision positioning component, a second battery string connection transmission line (4), a rotary string suction mechanism (6), and a battery string lateral movement mechanism (7). The photovoltaic module glass transmission line (1) is used to receive the photovoltaic module glass from the previous production line and transmit the photovoltaic module glass to the designated location. The first battery string connection transmission line (2) and the second battery string connection transmission line (4) are respectively used to transport the completed battery strings to the corresponding battery string picking positions. The visual positioning component is used to take pictures of the corners of the battery string at the battery string picking position and send the positioning coordinate information of the battery string to the battery string traversing mechanism (7). The rotating suction mechanism (6) is connected to the battery string transverse mechanism (7). The rotating suction mechanism (6) is used to adsorb and rotate the battery string at the battery string picking position. The battery string transverse mechanism (7) is used to drive the rotating suction mechanism (6) to move.
2. The novel automatic photovoltaic module cell string arrangement device according to claim 1, characterized in that: The photovoltaic module glass transmission line (1) includes a glass conveying motor (11), a drive shaft (12), a glass transport drive wheel (13), a guide bar (14), and a glass transport driven wheel (15). The drive shaft (12) is connected to the motor shaft of the glass conveying motor (11). The glass transport drive wheel (13) is fixed on the drive shaft (12). The glass transport drive wheel (13) is connected to the glass transport driven wheel (15) through the guide bar (14). The guide bar (14) is used to transport the photovoltaic module glass.
3. The novel automatic photovoltaic module cell string arrangement device according to claim 2, characterized in that: The photovoltaic module glass transmission line (1) is surrounded by a straightening mechanism, which includes an X-axis straightening component (81), a Y-axis straightening component (82), and a front blocking component; The X-axis alignment component (81) includes an X-axis moving component (85), an X-axis mounting plate (87), and an alignment cylinder (84). The X-axis mounting plate (87) is connected to the X-axis moving component (85), and the alignment cylinder (84) is fixed on the X-axis mounting plate (87). An alignment wheel (83) is provided on the piston rod of the alignment cylinder (84). The Y-axis alignment component (82) includes a Y-axis moving component (86) and a Y-axis mounting plate (89). The Y-axis mounting plate (89) is connected to the Y-axis moving component (86), and an alignment wheel (83) is provided on the Y-axis mounting plate (89). The front blocking assembly includes a blocking cylinder (88), on which a centering wheel (83) is provided, and the blocking cylinder (88) is located on the side of the glass transport drive wheel (13).
4. The novel automatic photovoltaic module cell string arrangement device according to claim 3, characterized in that: Both the X-axis moving component (85) and the Y-axis moving component (86) are linear modules.
5. The novel automatic photovoltaic module cell string arrangement device according to claim 1, characterized in that: The first battery series material transmission line (2) and the second battery series material transmission line (4) have the same structure. The first battery series material transmission line (2) includes a belt transmission component and a belt line moving component (205). The belt transmission component is connected to the belt line moving component (205), and the belt line moving component (205) drives the belt transmission component to move.
6. The novel automatic photovoltaic module cell string arrangement device according to claim 5, characterized in that: The belt transmission assembly includes a crossbeam (21), a main beam (22), a belt motor (23), a first driving wheel (24), a first driven wheel (25), a transmission shaft (26), a second driving wheel (27), a second driven wheel (28), a tensioning vertical plate (29), a tensioning horizontal plate (201), and a belt (202). The two main beams (22) are connected by a number of crossbeams (21), and the two ends of the main beams (22) are respectively provided with second driven wheels (28). The belt-driven motor (23) is connected to the crossbeam (21). The first driving wheel (24) is fixed on the motor shaft of the belt-driven motor (23). The first driving wheel (24) is connected to the first driven wheel (25) via a ring belt (204). The first driven wheel (25) is fixed on the drive shaft (26). The two ends of the drive shaft (26) are respectively fixed with second driving wheels (27). The tensioning plate (29) is connected to the main beam (22). The two tensioning plates (29) are connected by a tensioning cross plate (201). The drive shaft (26) is rotatably connected to the tensioning plate (29). The belt (202) is connected to the second driving wheel (27) and the second driven wheels (28) at both ends of the main beam (22) for transmission.
7. The novel automatic photovoltaic module cell string arrangement device according to claim 6, characterized in that: Above the second drive wheel (27) is a pair of tensioning wheels (203) for tensioning the belt (202), and the tensioning wheels (203) are fixed on the tensioning plate (29).
8. The novel automatic photovoltaic module cell string arrangement device according to claim 1, characterized in that: The visual positioning component includes a front positioning camera mechanism (31) for the battery string and a rear positioning camera mechanism (32) for the battery string. The front positioning camera mechanism is used to take pictures of the front corners of the battery string for positioning, and the rear positioning camera mechanism (32) is used to take pictures of the rear corners of the battery string for positioning.
9. The novel automatic photovoltaic module cell string arrangement device according to claim 1, characterized in that: The battery string lateral movement mechanism (7) is a linear module.
10. The novel automatic photovoltaic module cell string arrangement device according to claim 1, characterized in that: It also includes a battery string NG box (9) for holding NG battery strings.