Seedling raising device for garden trees

Abstract

The invention relates to the technical field of garden forest seedling raising, in particular to a garden forest seedling raising device which comprises a seedling raising box, a placement seat is fixedly connected in the seedling raising box, a seedling raising seat is arranged above the placement seat, a rotating frame is rotatably connected in the seedling raising box, and an adjusting seat is arranged on the rotating frame in a sliding fit mode. A material receiving mechanism is arranged on the adjusting seat in a sliding fit manner, a moving seat is arranged on the adjusting seat, a plurality of pressing plates are rotatably connected to the lower part of the moving seat, an automatic thinning mechanism is fixedly connected to the lower part of the moving seat, and a contact frame is arranged on one side of the automatic thinning mechanism in a sliding fit manner. According to the seedling thinning device, seedlings to be thinned can be clamped and moved upwards through the two seedling thinning clamping plates, so that automatic seedling thinning is achieved, the seedling thinning efficiency and accuracy are improved, the labor intensity and the labor cost are greatly reduced, meanwhile, damage to the seedlings is reduced, and the seedling raising quality is improved.

Description

Technical Field

[0001] This invention relates to the field of garden tree seedling cultivation technology, and in particular to a device for garden tree seedling cultivation. Background Technology

[0002] Landscape tree seedling cultivation refers to the process of cultivating seeds or seedlings into robust trees through scientific methods and techniques, providing high-quality plants for landscaping and forestry production.

[0003] The prior art publication CN120457922A provides a cultivation device for forest tree seedlings. The water collection tray facilitates the diversion and transportation of excess spray water or nutrient solution from each tray, avoiding waste. In addition, the tray is not only easy to adjust in height, but also can drive the ring-cutting component to intermittently cut the seedling roots that are excessively adhered to the inner wall of the cultivation cylinder. It can also drive the water collection tray to lift the soil layer and seedlings upward, making it easy to quickly and safely remove the seedlings after cultivation, avoiding damage to the seedlings during removal, and effectively improving the cultivation efficiency and work efficiency.

[0004] In existing technologies, forest seedling cultivation is carried out using cultivation tubes. However, when the seedlings reach a certain size, thinning is necessary. Current technologies are not suitable for automated thinning, requiring manual operation, which can lead to low efficiency. In large-scale seedling production, manual thinning is time-consuming and labor-intensive, making it difficult to meet the demands for rapid and efficient seedling cultivation.

[0005] In summary, the existing technology lacks a technique for automatic thinning of seedlings for garden trees. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of the prior art by proposing a seedling cultivation device for garden trees.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a seedling raising device for garden trees, comprising a seedling box, a placement seat fixedly connected inside the seedling box, a seedling seat above the placement seat, a rotating frame rotatably connected inside the seedling box, an adjusting seat slidably fitted on the rotating frame, a receiving mechanism slidably fitted on the adjusting seat, a movable seat on the adjusting seat, multiple pressure plates rotatably connected below the movable seat, an automatic thinning mechanism fixedly connected below the movable seat, and a contact frame slidably fitted on one side of the automatic thinning mechanism.

[0008] Preferably, a drain pipe is fixedly connected to the bottom of the placement seat, and the drain pipe is fixedly connected to the seedling box through it. The placement seat has multiple positioning holes.

[0009] Preferably, the bottom end of the seedling tray is provided with multiple positioning water guide pipes that are fixedly connected through it, and the positioning water guide pipes are movably connected to the positioning holes.

[0010] Preferably, a motor A is fixedly connected to the top of the rotating frame, the motor A is fixedly connected to the inner wall of the seedling box, a hydraulic rod is fixedly connected to the rotating frame, one end of the hydraulic rod is fixedly connected to the adjusting seat, an electric push rod A is fixedly connected through the adjusting seat, and the bottom end of the electric push rod A is fixedly connected to the movable seat.

[0011] Preferably, the receiving mechanism includes a sliding frame, which is slidably coupled to an adjusting seat. A tension spring is fixedly connected to one side of the top of the sliding frame, and the other end of the tension spring is fixedly connected to the adjusting seat. A connecting rod assembly is rotatably connected to the top of the sliding frame, and the other end of the connecting rod assembly is rotatably connected to the adjusting seat. An adjusting wheel is fixedly connected to one end of the connecting rod assembly connected to the adjusting seat. A receiving seat is movably inserted into the bottom of the sliding frame.

[0012] Preferably, an adjusting rack is fixedly connected to one side of the movable seat, the adjusting rack meshes with the adjusting wheel for transmission, and a guide head is fixedly connected to the lower side of the movable seat.

[0013] Preferably, a worm gear is fixedly connected to one end of the pressure plate, a worm is engaged with one side of the worm gear, a universal joint is fixedly connected to the worm, the universal joint is rotatably connected to the movable seat, and a transmission wheel is fixedly connected to one end of the universal joint.

[0014] Preferably, the automatic thinning mechanism includes an electric push rod B, which is fixedly connected to a movable base. A movable frame is fixedly connected to the output end of the electric push rod B. Multiple transmission racks are fixedly connected to the movable frame, and the transmission racks mesh with transmission wheels. A motor B is fixedly connected to the lower side of the movable frame, and a U-shaped frame is fixedly connected to the output end of the motor B. Two thinning clamps are symmetrically arranged and slidably fitted on the lower side of the movable frame. A sliding groove is opened at the top of the thinning clamp, and the inner wall of the sliding groove is slidably fitted with one end of the U-shaped frame.

[0015] Preferably, one end of the contact frame is in movable contact with the thinning clamp, and the other end of the contact frame is fixedly connected to a spring A. The other end of spring A is fixedly connected to a movable frame. A plurality of transmission teeth are rotatably connected to one side of the contact frame. One end of each transmission tooth is fixedly connected to a spring B, and the other end of spring B is fixedly connected to the contact frame. A transmission shaft is provided on one side of the contact frame. A spiral groove is formed on the transmission shaft, and the spiral groove is slidably engaged with a guide head. The transmission shaft is rotatably connected to the movable frame through it. An incomplete ratchet is fixedly connected to the bottom end of the transmission shaft, and the incomplete ratchet is movably engaged with the transmission teeth for transmission.

[0016] Compared with the prior art, the present invention has the following beneficial effects: By setting up an automatic thinning mechanism, two thinning clamps can clamp and move the seedlings to be thinned upwards, thereby achieving automatic thinning. During the upward movement, the contact frame connected to spring A will continuously hit the thinning clamps, causing them to vibrate. This allows the soil around the seedling roots to separate and fall back into the seedling bed without affecting the cultivation of other seedlings. This not only improves the efficiency and accuracy of thinning but also significantly reduces labor intensity and labor costs, while reducing seedling damage and improving seedling quality. By setting multiple pressure plates, when the thinning clamp moves down to clamp the seedlings, it can drive the multiple pressure plates to rotate to form a conical sleeve structure, so that the bottom of the pressure plate presses on the root of the seedling to be thinned, avoiding pulling up other seedlings during thinning. This can effectively improve the accuracy and efficiency of automatic thinning, not only protecting the root system of other seedlings and reducing the risk of accidental clamping, but also increasing the reliability of operation, which helps to improve the overall seedling quality and management efficiency. By setting up a receiving mechanism, the receiving seat can be automatically moved below and away from the adjusting seat as it moves up and down, which facilitates the automatic receiving and placement of seedlings pulled up during thinning, further improving the efficiency of automatic thinning. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a seedling raising device for garden trees according to the present invention; Figure 2 This is a partial structural schematic diagram of a seedling cultivation device for garden trees according to the present invention; Figure 3 This is a partial sectional view of the structure of a placement seat and seedling seat for a garden tree seedling raising device according to the present invention; Figure 4 This is a schematic diagram of the rotating frame and other structures of a garden tree seedling raising device according to the present invention; Figure 5 This is a schematic diagram of the material receiving mechanism for a garden tree seedling cultivation device according to the present invention. Figure 6 This is a partial cross-sectional schematic diagram of the structure of a movable seat and other components of a seedling raising device for garden trees according to the present invention; Figure 7 This is a schematic diagram of a pressure plate structure for a seedling cultivation device for garden trees according to the present invention; Figure 8 This is a schematic diagram showing the structure of an automatic thinning mechanism for a garden tree seedling raising device according to the present invention; Figure 9 This is a schematic diagram of the contact frame structure for a seedling cultivation device for garden trees according to the present invention.

[0018] The diagram shows the following components: 1. Seedling box; 2. Placement seat; 3. Seedling base; 4. Rotating frame; 5. Adjusting seat; 6. Receiving mechanism; 7. Moving seat; 8. Pressure plate; 9. Automatic thinning mechanism; 10. Contact frame; 201. Drainage pipe; 202. Positioning hole; 301. Positioning water guide pipe; 401. Motor A; 402. Hydraulic rod; 501. Electric push rod A; 601. Sliding frame; 602. Tension spring; 603. Linkage assembly; 604. Adjusting wheel; 605. Receiving seat. 701. Adjusting rack; 702. Guide head; 801. Worm gear; 802. Worm; 803. Universal joint; 804. Drive wheel; 901. Electric actuator B; 902. Moving frame; 903. Drive rack; 904. Motor B; 905. U-shaped frame; 906. Thinning clamp; 907. Slide groove; 1001. Spring A; 1002. Drive gear; 1003. Spring B; 1004. Drive shaft; 1005. Spiral groove; 1006. Incomplete ratchet. Detailed Implementation

[0019] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0020] like Figures 1-9 The device shown is for raising seedlings of garden trees and includes a seedling box 1, a placement seat 2 fixedly connected inside the seedling box 1, a seedling seat 3 above the placement seat 2, a rotating frame 4 rotatably connected inside the seedling box 1, an adjusting seat 5 slidably connected on the rotating frame 4, a receiving mechanism 6 slidably connected on the adjusting seat 5, a movable seat 7 on the adjusting seat 5, multiple pressure plates 8 rotatably connected below the movable seat 7, an automatic thinning mechanism 9 fixedly connected below the movable seat 7, and a contact frame 10 slidably connected to one side of the automatic thinning mechanism 9.

[0021] like Figure 3 As shown, a drain pipe 201 is fixedly connected to the bottom of the placement seat 2. The drain pipe 201 is fixedly connected to the seedling box 1 through the drain pipe 2. Multiple positioning holes 202 are provided on the placement seat 2.

[0022] like Figure 3 As shown, multiple positioning water guide pipes 301 are fixedly connected through the bottom of the seedling base 3, and the positioning water guide pipes 301 are movably inserted into the positioning holes 202.

[0023] like Figure 4 As shown, a motor A401 is fixedly connected to the top of the rotating frame 4. The motor A401 is fixedly connected to the inner wall of the seedling box 1. A hydraulic rod 402 is fixedly connected to the rotating frame 4. One end of the hydraulic rod 402 is fixedly connected to the adjusting seat 5. An electric actuator A501 is fixedly connected through the adjusting seat 5. The bottom end of the electric actuator A501 is fixedly connected to the movable seat 7. A camera is installed on the rotating frame 4.

[0024] like Figure 5 As shown, the receiving mechanism 6 includes a sliding frame 601, which is slidably fitted with an adjusting seat 5. A tension spring 602 is fixedly connected to one side of the top of the sliding frame 601, and the other end of the tension spring 602 is fixedly connected to the adjusting seat 5. A connecting rod assembly 603 is rotatably connected to the top of the sliding frame 601, and the other end of the connecting rod assembly 603 is rotatably connected to the adjusting seat 5. An adjusting wheel 604 is fixedly connected to one end of the connecting rod assembly 603 connected to the adjusting seat 5. A receiving seat 605 is movably inserted into the bottom of the sliding frame 601. When the electric actuator A501 drives the movable seat 7 to move downward, the adjusting rack 701 on the movable seat 7 will drive the adjusting wheel 604 to rotate, causing the adjusting wheel 604 to drive the connected connecting rod assembly 603 to rotate. This causes the connecting rod assembly 603, in conjunction with the tension spring 602, to move the sliding frame 601 and the receiving seat 605 to one side.

[0025] like Figure 6 As shown, an adjusting rack 701 is fixedly connected to one side of the movable seat 7. The adjusting rack 701 is meshed with the adjusting wheel 604 for transmission. A guide head 702 is fixedly connected to the lower side of the movable seat 7.

[0026] like Figure 7 As shown, a worm gear 801 is fixedly connected to one end of the pressure plate 8. A worm 802 is meshed and driven on one side of the worm gear 801. A universal joint 803 is fixedly connected to the worm 802. The universal joint 803 is rotatably connected to the movable seat 7. A transmission wheel 804 is fixedly connected to one end of the universal joint 803. The electric actuator B901 drives the connected movable frame 902 to move downward. At this time, the transmission rack 903 on the movable frame 902 drives the transmission wheel 804 to rotate, so that the transmission wheel 804 drives the worm 802 connected to the universal joint 803 to rotate. This allows the worm 802 to drive the pressure plate 8 connected to the worm gear 801 to rotate, causing the multiple pressure plates 8 to move closer together.

[0027] like Figure 8As shown, the automatic thinning mechanism 9 includes an electric actuator B901, which is fixedly connected to a movable base 7. A movable frame 902 is fixedly connected to the output end of the electric actuator B901. Multiple transmission racks 903 are fixedly connected to the movable frame 902, and the transmission racks 903 mesh with transmission wheels 804 for transmission. A motor B904 is fixedly connected to the lower side of the movable frame 902, and a U-shaped frame 905 is fixedly connected to the output end of the motor B904. Two thinning clamps 906 are symmetrically arranged and slidably fitted on the lower side of the movable frame 902. A groove 907 is opened at the top of the thinning clamp 906, and the inner wall of the groove 907 is slidably fitted with one end of the U-shaped frame 905. The motor B904 drives the connected U-shaped frame 905 to rotate, causing the two ends of the U-shaped frame 905 to slide within the groove 907, thereby driving the two thinning clamps 906 to move closer together to clamp the seedlings.

[0028] By setting up an automatic thinning mechanism 9, two thinning clamps 906 can clamp and move the seedlings to be thinned upwards, thereby achieving automatic thinning. At the same time, during the upward movement, the contact frame 10 connected to the spring A1001 will continuously hit the thinning clamps 906, causing them to vibrate. This allows the soil around the seedling roots to separate and fall back into the seedling base 3 without affecting the cultivation of other seedlings. This not only improves the efficiency and accuracy of thinning but also significantly reduces labor intensity and labor costs, while reducing seedling damage and improving seedling quality.

[0029] like Figure 9 As shown, one end of the contact frame 10 is in movable contact with the thinning clamp 906, and the other end of the contact frame 10 is fixedly connected to a spring A1001. The other end of the spring A1001 is fixedly connected to the movable frame 902. Multiple transmission teeth 1002 are rotatably connected to one side of the contact frame 10. One end of the transmission teeth 1002 is fixedly connected to a spring B1003, and the other end of the spring B1003 is fixedly connected to the contact frame 10. A transmission shaft 1004 is provided on one side of the contact frame 10. A spiral groove 1005 is provided on the transmission shaft 1004. The spiral groove 1005 is slidably engaged with the guide head 702. The transmission shaft 1004 is rotatably connected to the movable frame 902. An incomplete ratchet 1006 is fixedly connected to the bottom end of the transmission shaft 1004. The incomplete ratchet 1006 is movably engaged with the transmission teeth 1002 for transmission. Under the action of the guide head 702, the drive shaft 1004 with the spiral groove 1005 rotates, causing the drive shaft 1004 to drive the connected incomplete ratchet 1006 to rotate. The incomplete ratchet 1006 then drives the contact frame 10 connected to the drive gear 1002 to move. When the incomplete ratchet 1006 disengages from the drive gear 1002, the contact frame 10 quickly resets under the action of the spring A1001, impacting the thinning clamp 906. The spring B1003 enables the drive gear 1002 to reset quickly.

[0030] Working principle: When it is necessary to cultivate seedlings of garden trees, first place the seedling tray 3 containing seeds and soil into the seedling box 1. At this time, align the positioning water guide tube 301 at the bottom of the seedling tray 3 with the positioning hole 202 and insert it to fix it. When the seedlings grow to a certain height, usually about 5-10 cm, depending on the plant species, observe their spacing and growth. If the density between seedlings is too high, it will affect their healthy growth, thus requiring thinning. First, the camera on the rotating frame 4 is used to collect and analyze the image on the seedling tray 3 to determine the position to be thinned. Then, the motor A401 is used to drive the connected rotating frame 4 to rotate, and then the hydraulic rod 402 is used to drive the adjusting seat 5 to move to the appropriate position. Then, the electric actuator A501 drives the moving seat 7 to move down. At this time, the adjusting rack 701 on the moving seat 7 will drive the adjusting wheel 604 to rotate, so that the adjusting wheel 604 drives the connected linkage 603 to rotate, so that the linkage 603, together with the tension spring 602, drives the sliding frame 601 and the receiving seat 605 to move to one side. Then, when multiple pressing plates 8 are inserted around the seedlings to be thinned, the electric push rod B901 drives the connected moving frame 902 to move down. At this time, the transmission rack 903 on the moving frame 902 will drive the transmission wheel 804 to rotate, so that the transmission wheel 804 drives the worm gear 802 connected to the universal joint 803 to rotate, so that the worm gear 802 can drive the pressing plate 8 connected to the worm wheel 801 to rotate, so that multiple pressing plates 8 come closer to each other, so that the bottom of the pressing plate 8 presses on the roots of the seedlings to be thinned. Then, as the moving frame 902 continues to move downward, the two thinning clamps 906 will move to both sides of the seedling to be thinned. Then, the motor B904 drives the connected U-shaped frame 905 to rotate, so that the two ends of the U-shaped frame 905 slide in the sliding groove 907, thereby driving the two thinning clamps 906 to move closer to each other to clamp the seedling. Then, when the electric push rod B901 drives the connected moving frame 902 to move upward, it will pull up the clamped seedling. At this time, the pressure plate 8 can prevent the roots of the pulled seedling from pulling up other seedlings. At this time, under the action of the guide head 702, the drive shaft 1004 with the spiral groove 1005 will rotate, so that the drive shaft 1004 can drive the connected incomplete ratchet 1006 to rotate, so that the incomplete ratchet 1006 can drive the contact frame 10 connected to the drive gear 1002 to move. Then, when the incomplete ratchet 1006 disengages from the drive gear 1002, under the action of the spring A1001, the contact frame 10 will quickly reset and hit the thinning clamp 906, so that the seedling held by the thinning clamp 906 will vibrate, so that the soil attached to the roots of the seedling can fall back onto the seedling base 3. Then, the electric push rod A501 drives the moving seat 7 to move upward. At this time, the adjusting rack 701 on the moving seat 7 will drive the adjusting wheel 604 to rotate, so that the adjusting wheel 604 drives the connected linkage group 603 to rotate, so that the linkage group 603 drives the receiving seat 605 on the sliding frame 601 to move below the automatic thinning mechanism 9. Then, the motor B904 drives the connected U-shaped frame 905 to rotate in the opposite direction, thereby driving the two thinning clamps 906 to separate, so that the pulled seedlings can fall into the receiving seat 605 for collection.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A seedling raising device for garden trees, comprising a seedling box (1), characterized in that: The seedling box (1) is fixedly connected to a placement seat (2), and a seedling seat (3) is provided above the placement seat (2). The seedling box (1) is rotatably connected to a rotating frame (4), and an adjusting seat (5) is slidably fitted on the rotating frame (4). A receiving mechanism (6) is slidably fitted on the adjusting seat (5). A movable seat (7) is provided on the adjusting seat (5). Multiple pressure plates (8) are rotatably connected below the movable seat (7). An automatic thinning mechanism (9) is fixedly connected below the movable seat (7). A contact frame (10) is slidably fitted on one side of the automatic thinning mechanism (9).

2. The device for raising seedlings of garden trees according to claim 1, characterized in that: The bottom of the placement seat (2) is fixedly connected to a drain pipe (201), and the drain pipe (201) is fixedly connected to the seedling box (1). The placement seat (2) is provided with multiple positioning holes (202).

3. The device for raising seedlings of garden trees according to claim 2, characterized in that: The bottom end of the seedling base (3) is fixedly connected with multiple positioning water guide pipes (301), and the positioning water guide pipes (301) are movably inserted into the positioning holes (202).

4. The device for raising seedlings of garden trees according to claim 1, characterized in that: The top of the rotating frame (4) is fixedly connected to a motor A (401), the motor A (401) is fixedly connected to the inner wall of the seedling box (1), the rotating frame (4) is fixedly connected to a hydraulic rod (402), one end of the hydraulic rod (402) is fixedly connected to an adjusting seat (5), an electric push rod A (501) is fixedly connected through the adjusting seat (5), and the bottom end of the electric push rod A (501) is fixedly connected to a moving seat (7).

5. A seedling raising device for garden trees according to claim 1, characterized in that: The receiving mechanism (6) includes a sliding frame (601), which is slidably coupled to the adjusting seat (5). A tension spring (602) is fixedly connected to one side of the top of the sliding frame (601), and the other end of the tension spring (602) is fixedly connected to the adjusting seat (5). A connecting rod group (603) is rotatably connected to the top of the sliding frame (601), and the other end of the connecting rod group (603) is rotatably connected to the adjusting seat (5). An adjusting wheel (604) is fixedly connected to one end of the connecting rod group (603) connected to the adjusting seat (5). A receiving seat (605) is movably inserted into the bottom of the sliding frame (601).

6. The device for raising seedlings in gardens and forests according to claim 5, characterized in that: An adjusting rack (701) is fixedly connected to one side of the movable seat (7), and the adjusting rack (701) is meshed with the adjusting wheel (604) for transmission. A guide head (702) is fixedly connected to the lower side of the movable seat (7).

7. A seedling raising device for garden trees according to claim 6, characterized in that: One end of the pressure plate (8) is fixedly connected to a worm gear (801), and a worm (802) is meshed and driven on one side of the worm gear (801). A universal joint (803) is fixedly connected to the worm (802), and the universal joint (803) is rotatably connected to the movable seat (7). A transmission wheel (804) is fixedly connected to one end of the universal joint (803).

8. A seedling raising device for garden trees according to claim 7, characterized in that: The automatic thinning mechanism (9) includes an electric push rod B (901), which is fixedly connected to a movable seat (7). A movable frame (902) is fixedly connected to the output end of the electric push rod B (901). Multiple transmission racks (903) are fixedly connected to the movable frame (902). The transmission racks (903) mesh with the transmission wheel (804). A motor B (904) is fixedly connected to the lower side of the movable frame (902). A U-shaped frame (905) is fixedly connected to the output end of the motor B (904). Two thinning clamps (906) are symmetrically arranged and slidably fitted on the lower side of the movable frame (902). A groove (907) is opened at the top of the thinning clamp (906). The inner wall of the groove (907) is slidably fitted with one end of the U-shaped frame (905).

9. A seedling raising device for garden trees according to claim 8, characterized in that: One end of the contact frame (10) is in movable contact with the thinning clamp (906), and the other end of the contact frame (10) is fixedly connected to a spring A (1001). The other end of the spring A (1001) is fixedly connected to a movable frame (902). A plurality of transmission teeth (1002) are rotatably connected to one side of the contact frame (10). One end of the transmission teeth (1002) is fixedly connected to a spring B (1003), and the other end of the spring B (1003) is fixedly connected to the contact frame (10). The contact frame (10) is provided with a drive shaft (1004) on one side. The drive shaft (1004) has a spiral groove (1005) and is slidably engaged with the guide head (702). The drive shaft (1004) is rotatably connected to the moving frame (902). An incomplete ratchet (1006) is fixedly connected to the bottom end of the drive shaft (1004). The incomplete ratchet (1006) is movably engaged with the drive gear (1002) for transmission.

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