Seedling root ball protection device

Abstract

This utility model discloses a seedling root ball protection device, belonging to the technical field of landscaping equipment. The device includes a support frame, a rotating arm, a first protective frame, and a second protective frame. The rotating arm rotatably connects the support frame, the first protective frame, and the second protective frame, allowing the protective frames to open and close. It also includes a fixing mechanism and a support mechanism. The fixing mechanism is located between the first and second protective frames and includes a first fixing block, a first spring, a connecting pad, a hook, and a limiting component. The limiting component includes a second fixing block and a limiting frame, with the hook engaging with the limiting frame to achieve elastic locking. The support mechanism is fixed to the inner wall of each frame and includes a protective shell, a support pad slidably connected within the protective shell, and a contact pad fixed to the support pad. This utility model solves the problems of poor buffering and loose wrapping in existing technologies, and has the advantages of convenient operation, reliable locking, good buffering and shock absorption, and effective protection of the root ball.

Description

Technical Field

[0001] This utility model relates to the field of landscaping equipment technology, and in particular to a seedling root ball protection device. Background Technology

[0002] In modern landscaping projects, the survival rate of transplanted seedlings is a key indicator of project quality, and the integrity of the root ball during the seedling uprooting process directly determines whether the seedlings can quickly recover and grow after transplanting. To protect the root system, the root ball usually needs to be wrapped and secured after uprooting to prevent it from loosening or disintegrating during handling and transportation.

[0003] However, current soil ball protection technologies mainly rely on tightly wrapped straw ropes, non-woven fabric wrapping, or the use of simple rigid frames (such as wooden boxes or iron cages) for loading. These traditional methods have significant structural defects in practical applications, the core problem being the lack of effective adaptive support and cushioning mechanisms. Specifically, because the excavated soil balls are often irregular in shape and vary in size, existing rigid protection devices typically only provide a fixed receiving space, making it difficult to conform to the uneven contours of the soil ball surface. This results in gaps between the soil ball and the inner wall of the device, or the formation of rigid hard contact points.

[0004] In this rigid contact or gap-filled fixing method, when seedlings experience hoisting swaying or the bumps of long-distance transportation, the external impact energy is directly transmitted to the fragile root ball, or causes the root ball to undergo rigid collisions and reciprocating displacement within the device. This continuous vibration and impact can easily cause the internal structure of the root ball to loosen, crack, or even completely disintegrate, thereby breaking the seedling's capillary root system and severely reducing the transplant survival rate. In addition, existing protective devices mostly use bolts or wires for rigid locking, which is cumbersome and time-consuming to operate, and it is difficult to maintain a constant fastening force during transportation vibrations, making it difficult to achieve continuous and stable wrapping of the root ball.

[0005] Therefore, this utility model proposes a seedling root ball protection device to address the shortcomings of existing technologies. Utility Model Content

[0006] In view of the problems existing in the seedling root ball protection device, such as the lack of an effective buffer and shock absorption structure, difficulty in adaptively fitting irregular root balls, susceptibility to root ball damage due to impact during transportation, and cumbersome locking and fixing methods with unstable wrapping, this utility model aims to provide a seedling root ball protection device with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a seedling root ball protection device, including: a support frame, a rotating arm rotatably connected to the top of the support frame, and a protective frame one and a protective frame two rotatably connected to the end of the rotating arm away from the support frame, respectively. The protective frame one and the protective frame two can close along the outer wall of the support frame to form a wrapping space by rotating the rotating arm.

[0008] The device also includes a fixing mechanism disposed between the outer wall of the first protective frame and the outer wall of the second protective frame, and a support mechanism fixedly connected to the inner walls of the support frame, the first protective frame, and the second protective frame.

[0009] The fixing mechanism includes a fixing block 1 fixedly connected to the outer wall of the first protective frame, a spring 1 fixedly connected to the fixing block 1, a connecting pad fixedly connected to the spring 1, and a hook fixedly connected to the connecting pad; the fixing mechanism also includes a limiting component fixedly connected to the outer wall of the second protective frame, the limiting component including a fixing block 2 fixedly connected to the outer wall of the second protective frame, and a limiting frame fixedly connected to the side of the fixing block 2 near the fixing block; the hook head of the hook passes through and engages with the inner hole edge of the limiting frame, and is elastically locked by the tension of the spring 1.

[0010] Furthermore, the support mechanism includes a protective shell fixedly connected to the inner wall, a support pad slidably connected inside the protective shell, and a contact pad fixedly connected to the side of the support pad away from the inner wall of the protective shell; a damper and a second spring are disposed inside the protective shell and between the support pad and the inner bottom wall of the protective shell; the fixed end of the damper is fixedly connected to the inner bottom wall of the protective shell, the telescopic end of the damper is fixedly connected to the support pad, and the second spring is sleeved on the outer periphery of the damper, together forming an adaptive buffer unit.

[0011] Preferably, the contact pad is made of rubber, and the outer surface of the contact pad facing the enclosing space is provided with an arc-shaped groove. The arc-shaped groove increases the contact area with the soil ball, making the force more uniform, reducing local pressure, and achieving a better flexible contact effect.

[0012] Preferably, the second spring is a compression spring, with one end of the second spring abutting against the inner bottom wall of the protective shell and the other end of the second spring abutting against the side surface of the support pad facing the inside of the protective shell. This abutting method allows the support pad to stably compress the second spring when compressed and provide a continuous elastic reaction force.

[0013] Preferably, the damper is a hydraulic damper. The damper provides buffering damping through the reciprocating motion of the telescopic end. The damping effect can effectively slow down the movement speed of the second spring, preventing the soil ball from being subjected to secondary impact due to the rapid rebound of the spring when encountering bumps, thus ensuring the stability of the support.

[0014] Preferably, there are two rotating arms, which are symmetrically arranged on both sides of the top of the support frame. One rotating arm is connected to the first protective frame, and the other rotating arm is connected to the second protective frame. This symmetrical layout ensures that the first and second protective frames move smoothly and are subjected to balanced forces during opening and closing, which is convenient for aligning the package.

[0015] Preferably, the outer surface of the connecting pad is provided with anti-slip texture to facilitate the operator to pull it, and the hook is integrally formed with the connecting pad to ensure the structural strength of the connection and the reliability of the pulling operation.

[0016] Preferably, the inner wall of the support frame is hemispherical. The inner wall shape formed by the closure of the first protective frame and the second protective frame together with the inner wall shape of the support frame constitute a complete spherical cavity. The cavity shape design aims to maximize the fit to the contour of the soil ball and achieve a seamless wrapping.

[0017] Preferably, the connecting pad is used by the operator to pull, thereby moving the hook and stretching the spring, so as to realize the quick engagement or unlocking of the hook and the limiting frame. The design eliminates the need for additional fixing tools and greatly improves the efficiency of loading and unloading the soil ball.

[0018] This utility model has the following beneficial effects:

[0019] 1. This utility model solves the problems of cumbersome locking operation, reliance on tools, and easy loosening during transportation of existing soil ball protection devices by setting a fixing mechanism consisting of a fixing block, spring, connecting pad, hook, and limiting component. It achieves the technical effects of convenient operation, fast locking, and continuous elastic locking through spring tension to prevent the wrapping from loosening.

[0020] 2. This utility model, through a support mechanism installed on the inner wall of the support frame and protective frame, which consists of a protective shell, damper, spring, support pad, and contact pad working in concert, solves the problem in the prior art where the protective device only provides rigid support, is difficult to adapt to irregular soil balls, and lacks buffering and shock absorption functions, resulting in the soil ball being easily damaged or tipped over during transportation. It achieves the technical effect of using springs to provide flexible adaptive fit and using dampers to absorb vibration and impact energy, realizing multi-point buffering support, and effectively protecting the structural integrity of the soil ball.

[0021] 3. This utility model, by using a support frame as the bottom support and setting two protective frames connected by rotating arms, forms an openable wrapping structure, which solves the problems of inconvenient operation and difficulty in alignment when loading heavy soil balls in the existing integral nesting device. It achieves the technical effect of large opening and closing angle, convenient soil ball loading and unloading process, and improved seedling lifting efficiency. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the seedling root ball protection device proposed in this utility model;

[0023] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0024] Figure 3 This is a schematic diagram of the protective shell of the seedling root ball protection device proposed in this utility model;

[0025] Figure 4 This is a schematic diagram of the support pad of the seedling soil ball protection device proposed in this utility model.

[0026] Legend:

[0027] 1. Support frame; 2. Rotating arm; 3. Protective frame one; 4. Protective frame two; 5. Fixing mechanism; 51. Fixing block one; 52. Spring one; 53. Connecting pad; 54. Hook; 55. Limiting component; 551. Fixing block two; 552. Limiting frame; 6. Supporting mechanism; 61. Protective shell; 62. Damper; 63. Spring two; 64. Support pad; 65. Contact pad. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] Example:

[0030] Reference Figures 1 to 4 This utility model provides a seedling root ball protection device, which aims to solve the problems of existing seedling root ball protection devices, such as loose wrapping, cumbersome operation leading to easy disintegration of the root ball, and lack of effective buffer support structure leading to root ball damage and reduced survival rate during seedling transplanting due to force imbalance or vibration.

[0031] The seedling root ball protection device includes a support frame 1. A rotating arm 2 is rotatably connected to the top of the support frame 1. A protective frame 3 and a protective frame 4 are rotatably connected to the end of the rotating arm 2 away from the support frame 1. The protective frame 3 and the protective frame 4 can close along the outer wall of the support frame 1 to form a wrapping space through the rotation of the rotating arm 2. A fixing mechanism 5 is connected between the outer wall of the protective frame 3 and the outer wall of the protective frame 4. The fixing mechanism 5 includes a fixing block 51 fixedly connected to the outer wall of the protective frame 3. A spring 52 is fixedly connected to one side of the fixing block 51. The spring 52 is located away from the outer wall of the protective frame 3. One end of the fixed block 51 is fixedly connected to a connecting pad 53, and the end of the connecting pad 53 away from the spring 52 is fixedly connected to a hook 54. The fixing mechanism 5 also includes a limiting component 55 fixedly connected to the outer wall of the second protective frame 4. The limiting component 55 includes a fixing block 551 fixedly connected to the outer wall of the second protective frame 4. A limiting frame 552 is fixedly connected to the side of the fixing block 551 near the fixing block 51. The hook head of the hook 54 passes through and engages with the inner hole edge of the limiting frame 552. The inner walls of the support frame 1, the first protective frame 3, and the second protective frame 4 are all fixedly connected to a support mechanism 6.

[0032] The support mechanism 6 includes a protective shell 61 fixedly connected to the inner wall. A support pad 64 is slidably connected inside the protective shell 61. A contact pad 65 is fixedly connected to the side of the support pad 64 away from the inner wall of the protective shell 61. A damper 62 and a second spring 63 are provided inside the protective shell 61 and between the support pad 64 and the inner bottom wall of the protective shell 61. The fixed end of the damper 62 is fixedly connected to the inner bottom wall of the protective shell 61, and the telescopic end of the damper 62 is fixedly connected to the support pad 64. The second spring 63 is sleeved on the outer periphery of the damper 62.

[0033] The fixing mechanism 5 is used to elastically lock and fix the first protective frame 3 and the second protective frame 4. The fixing mechanism 5 includes a fixing block 51 fixedly connected to the outer wall of the first protective frame 3. A spring 52 is fixedly connected to one side of the fixing block 51. A connecting pad 53 is fixedly connected to the end of the spring 52 away from the fixing block 51. A hook 54 is fixedly connected to the end of the connecting pad 53 away from the spring 52. The fixing mechanism 5 also includes a limiting component 55, which is fixedly connected to the outer wall of the second protective frame 4. The limiting component 55 includes components fixedly connected to the second protective frame 4. The second fixing block 551 on the outer wall is fixedly connected to the side of the first fixing block 51 with the limit frame 552; the outer surface of the connecting pad 53 is provided with anti-slip texture, and the hook 54 is integrally formed with the connecting pad 53; when the operator pulls the connecting pad 53, it drives the hook 54 to move and stretches the first spring 52 until the hook head of the hook 54 passes through and engages with the inner hole edge of the limit frame 552. After the connecting pad 53 is released, the contraction force of the first spring 52 pulls the first protective frame 3 and the second protective frame 4 tight and fixed through the hook 54 and the limit frame 552.

[0034] Support mechanisms 6 are evenly distributed on the inner walls of support frame 1, protective frame 3, and protective frame 4 to provide flexible buffer support. Support mechanisms 6 include a protective shell 61 fixedly connected to the inner wall. A support pad 64 is slidably connected inside the protective shell 61. A contact pad 65 is fixedly connected to the side of the support pad 64 away from the inner wall of the protective shell 61, i.e., the side facing the enclosing space. The contact pad 65 is made of rubber and has an arc-shaped groove on its outer surface facing the enclosing space for gentle contact with the soil ball. A damper 62 and a spring 63 are disposed inside the protective shell 61, between the support pad 64 and the inner bottom wall of the protective shell 61. The damper 62 is a hydraulic damper. The fixed end of the damper 62 is fixedly connected to the inner bottom wall of the protective shell 61, and the telescopic end of the damper 62 is fixedly connected to the support pad 64. The damper 62 provides buffer damping through the reciprocating motion of the telescopic end to slow down the movement speed of the second spring 63. The second spring 63 is sleeved on the outer periphery of the damper 62. The second spring 63 is a compression spring. One end of the second spring 63 abuts against the inner bottom wall of the protective shell 61, and the other end of the second spring 63 abuts against the side surface of the support pad 64 facing the inside of the protective shell 61. When the second spring 63 is compressed, it generates an elastic reaction force, which is smoothly transmitted to the surface of the soil ball through the support pad 64 and the contact pad 65.

[0035] In a preferred embodiment, the contact pad 65 is made of rubber, and an arc-shaped groove is provided on the outer surface of the contact pad 65 facing the enclosing space. The arc-shaped groove design makes the contact pad 65 softer against the outer wall of the soil ball, increases the contact area, and disperses local pressure. The second spring 63 is a compression spring. One end of the second spring 63 abuts against the inner bottom wall of the protective shell 61, and the other end of the second spring 63 abuts against the side surface of the support pad 64 facing the inside of the protective shell 61. This abutment connection method simplifies the assembly process and facilitates maintenance and replacement. The damper 62 is a hydraulic damper. The damper 62 provides buffer damping through the reciprocating motion of the telescopic end to slow down the movement speed of the second spring 63 when it is compressed or extended, effectively preventing sudden changes in support force from causing impact damage to the soil ball structure. There are two rotating arms 2, which are symmetrically arranged on both sides of the top of the support frame 1. One of the rotating arms 2 is connected to the protective shell 64. The first frame 3 and the other rotating arm 2 are connected to the second protective frame 4. This symmetrical arrangement ensures that the first protective frame 3 and the second protective frame 4 open and close synchronously and smoothly, avoiding uneven force on one side. The outer surface of the connecting pad 53 is provided with anti-slip texture to provide sufficient friction when the operator pulls the connecting pad 53. The hook 54 is integrally formed with the connecting pad 53. This connection method ensures reliable transmission of the pulling action. The inner wall shape of the support frame 1 is hemispherical. The inner wall shape formed by the first protective frame 3 and the second protective frame 4 after closing together with the inner wall shape of the support frame 1 constitutes a complete spherical cavity. This cavity shape allows the device to conform to the natural shape of the soil ball to the greatest extent and achieve a tight wrap. The materials of the second fixing block 551 and the limiting frame 552 in the limiting component 55 are preferably high-strength engineering plastics or wear-resistant metals to ensure that the buckling part will not deform or fail under the long-term elastic tension of the spring 52.

[0036] The implementation principle of this application embodiment is as follows: The seedling root ball protection device is designed with "opening and closing wrapping plus elastic locking plus buffer support" as its core design logic. The support frame 1 serves as the overall load-bearing foundation. The top is rotatably connected to the first protective frame 3 and the second protective frame 4 through the rotating arm 2, forming an openable and closable root ball wrapping structure. The fixing mechanism 5 is assembled between the first protective frame 3 and the second protective frame 4 to achieve locking and fixation. The support mechanism 6 is evenly distributed on the inner walls of the support frame 1, the first protective frame 3, and the second protective frame 4, forming an integrated protection system of "all-round wrapping + multi-point buffering". The first protective frame 3 and the second protective frame 4 are opened and closed by the rotation of the rotating arm 2 to adapt to the wrapping needs of root balls of different sizes. The fixing mechanism 5 quickly locks the two protective frames through the cooperation of the first spring 52, the hook 54, and the limit frame 552 to ensure the wrapping is stable. The support mechanism 6 provides flexible support and buffering with the synergistic effect of the damper 62 and the second spring 63 to prevent the root ball from tipping over due to unbalanced force. The various structures work together to solve the problems of traditional soil ball protection devices, such as loose wrapping, cumbersome operation, and easy soil ball disintegration. Furthermore, the buffer design reduces the risk of damage during transplanting, thereby improving the survival rate and ease of operation of transplanted seedlings.

[0037] First, place the root ball of the seedling inside the support frame 1, so that the support frame 1 covers the lower half of the root ball. Since the top of the support frame 1 is rotatably connected to two rotating arms 2, with one end of one rotating arm 2 rotatably connected to the bottom of the protective frame 3 and the other end of the other rotating arm 2 rotatably connected to the bottom of the protective frame 4, the rotation of these two rotating arms 2 allows the protective frames 3 and 4 to rotate around the outer wall of the support frame 1 until the protective frames 3 and 4 completely cover the upper half of the root ball. Next, because one end of spring 52 is fixedly connected to the outer wall of fixing block 51, and fixing block 51 is fixedly connected to the outer wall of protective frame 3, and the other end of spring 52 is also fixedly connected to a connecting pad 53, and the other end of connecting pad 53 is fixedly connected to a hook 54, the limiting component 55 includes a limiting frame 552, one end of which is fixedly connected to the side of fixing block 2 551 near fixing block 1 51, and fixing block 2 551 is fixedly connected to the outer wall of protective frame 4. The operator can pull the connecting pad 53, causing the hook 54 to move along with it. During this process, the spring 52 will be stretched synchronously until the outer wall of the hook 54 is engaged with the outer wall of the limiting frame 552. At this point, the force on the connecting pad 53 is released, and the spring 52 will release its contraction elasticity. Through the transmission of the fixing block 51, the connecting pad 53, the hook 54, the limiting frame 552, and the fixing block 551, the protective frame 3 and the protective frame 4 are kept in the state of wrapping the soil ball. This completes the operation of protecting the soil ball. When it is necessary to remove the soil ball, the operator only needs to pull the connecting pad 53 again, and the spring 52 will be stretched again until the outer wall of the hook 54 is disengaged from the outer wall of the limiting frame 552. At this point, the force on the connecting pad 53 is released, and the spring 52 begins to naturally contract and recover. Then, through the opposite rotation of the two rotating arms 2, the protective frame 3 and the protective frame 4 rotate around the outer wall of the support frame 1 and open. Finally, the soil ball of the seedling can be easily removed from the inside of the support frame 1.

[0038] As the soil ball is placed inside the support frame 1 and the protective frames 3 and 4 gradually close together, the support mechanism 6 starts working simultaneously: First, the outer wall of the contact pad 65 gently contacts the outer wall of the soil ball. The contact pad 65 is made of rubber, which provides initial positioning for subsequent support. Then, due to the pressure transmitted by the soil ball, the support pad 64 begins to slowly move along the inner wall of the protective shell 61 towards the inside of the protective shell 61. Since the second spring 63 is sleeved on the outside of the damper 62, the support pad 64 will simultaneously squeeze the damper 62 and the second spring 63 during the movement. At this time, the damper 62 will then slow down the movement speed of the second spring 63 through its own damping characteristics, preventing the second spring 63 from being quickly crushed. The compression causes a sudden change in the supporting force. Spring 63 undergoes compression deformation under the squeezing action, and generates a reaction force in the opposite direction to the movement of the support pad 64. Finally, the elastic reaction force generated by spring 63 is smoothly transmitted to the surface of the soil ball through the support pad 64. This not only keeps the soil ball in a stable supporting state inside the support frame 1, but also effectively prevents the soil ball from tipping over due to force imbalance when it is placed into the support frame 1 or subsequently removed from the support frame 1. This ensures that the soil ball remains intact throughout the entire operation. In addition, a portion of the outer wall of the protective shell 61 is fixedly connected to the inner wall of the protective frame 3 or the protective frame 4, while the outer wall of the other portion of the protective shell 61 is fixedly connected to the inner wall of the support frame 1.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A seedling root ball protection device, including a support frame (1) and a rotating arm (2) rotatably connected to the top of the support frame (1). The end of the rotating arm (2) away from the support frame (1) is rotatably connected to a first protective frame (3) and a second protective frame (4). The first protective frame (3) and the second protective frame (4) can close along the outer wall of the support frame (1) to form a wrapping space by rotating the rotating arm (2). Its features are, A fixing mechanism (5) is connected between the outer wall of the first protective frame (3) and the outer wall of the second protective frame (4). The fixing mechanism (5) includes a fixing block (51) fixedly connected to the outer wall of the first protective frame (3). A spring (52) is fixedly connected to one side of the fixing block (51). A connecting pad (53) is fixedly connected to the end of the spring (52) away from the fixing block (51). A hook (54) is fixedly connected to the end of the connecting pad (53) away from the spring (52).

2. The seedling root ball protection device according to claim 1, characterized in that, The fixing mechanism (5) further includes a limiting component (55) fixedly connected to the outer wall of the second protective frame (4). The limiting component (55) includes a fixing block two (551) fixedly connected to the outer wall of the second protective frame (4). A limiting frame (552) is fixedly connected to the side of the fixing block two (551) near the fixing block one (51). The hook head of the hook (54) passes through and engages with the inner hole edge of the limiting frame (552). The inner walls of the support frame (1), the first protective frame (3), and the second protective frame (4) are all fixedly connected to a support mechanism (6). The support mechanism (6) includes a protective shell (61) fixedly connected to the inner wall. A support pad (64) is slidably connected inside the protective shell (61). A contact pad (65) is fixedly connected to the side of the support pad (64) away from the inner wall of the protective shell (61). A damper (62) and a second spring (63) are provided inside the protective shell (61) and between the support pad (64) and the inner bottom wall of the protective shell (61). The fixed end of the damper (62) is fixedly connected to the inner bottom wall of the protective shell (61), and the telescopic end of the damper (62) is fixedly connected to the support pad (64). The second spring (63) is sleeved on the outer periphery of the damper (62).

3. The seedling root ball protection device according to claim 2, characterized in that, The contact pad (65) is made of rubber, and the outer surface of the contact pad (65) facing the enclosing space is provided with an arc-shaped groove.

4. The seedling root ball protection device according to claim 2, characterized in that, The second spring (63) is a compression spring. One end of the second spring (63) abuts against the inner bottom wall of the protective shell (61), and the other end of the second spring (63) abuts against the side surface of the support pad (64) facing the inside of the protective shell (61).

5. The seedling root ball protection device according to claim 2, characterized in that, The damper (62) is a hydraulic damper, which provides buffer damping through the reciprocating motion of the telescopic end to slow down the movement speed of the second spring (63).

6. The seedling root ball protection device according to claim 2, characterized in that, There are two rotating arms (2), which are symmetrically arranged on both sides of the top of the support frame (1). One of the rotating arms (2) is connected to the first protective frame (3), and the other rotating arm (2) is connected to the second protective frame (4).

7. The seedling root ball protection device according to claim 2, characterized in that, The outer surface of the connecting pad (53) is provided with anti-slip texture, and the hook (54) is integrally formed with the connecting pad (53).

8. The seedling root ball protection device according to claim 2, characterized in that, The inner wall of the support frame (1) is hemispherical. The inner wall shape formed by the first protective frame (3) and the second protective frame (4) after they are closed together together with the inner wall shape of the support frame (1) constitutes a complete spherical cavity.

9. The seedling root ball protection device according to claim 2, characterized in that, The connecting pad (53) is used by the operator to pull it to move the hook (54) and stretch the spring (52), thereby enabling the hook (54) to engage or disengage from the limiting frame (552).

Images