Simple blood sampling frame for primates

Abstract

The utility model discloses a simple blood sampling frame for primates in the field of auxiliary equipment for conventional physical examination of the primates, which comprises a lifting frame mounted on an iron fence, and a lifting mechanism, an extending cylinder, an arc-shaped sliding plate and a holding mechanism which are mounted on the lifting frame, the lifting frame can lift along the lifting frame; the extending cylinder is fixedly mounted on the lifting mechanism, ascends and descends along the lifting frame, and is used for placing arms of primates; the arc-shaped sliding plate is slidably connected to the extending cylinder, and the distance between the arc-shaped sliding plate and the iron fence can be adjusted; the holding mechanism is fixedly installed on the arc-shaped sliding plate and slides along the extending cylinder along with the arc-shaped sliding plate. The extending cylinder ascends and descends along the lifting frame so as to meet the requirements of primates with different heights; the arc-shaped sliding plate slides along the extending cylinder so as to meet the requirements of primates with different arm lengths; the holding mechanism is used for holding the primate during blood sampling, and exposure of arm blood vessels is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of auxiliary equipment for routine physical examination of primates, in particular to a simple blood sampling rack for primates. Background Art

[0002] Regular physical examinations of wild animals are an important measure to improve animal welfare. By establishing a health record of wild animals, including basic data such as weight, body temperature, biochemistry, and general parameters, it is helpful to effectively identify and promptly treat diseases when they occur.

[0003] In daily feeding and management, through positive reinforcement behavioral training, small and medium-sized primates can calmly and steadily cooperate with trainers or veterinarians to complete various examination items, including blood collection, without artificial forceful capture or chemical restraint, thereby reducing the risks brought by forced restraint stress or anesthesia and the impact of related operations on blood parameters.

[0004] Existing blood collection stands have the following shortcomings: the gripping part is often a horizontal bar, and small and medium-sized primates instinctively grip with their palms facing downward, which is not conducive to exposing the blood vessels in their arms; the gripping position cannot be flexibly adjusted according to the length of the primates' arms, etc.

[0005] Based on this, the utility model designs a simple primate blood sampling stand to solve the above problems. Utility Model Content

[0006] The utility model aims to provide a simple primate blood sampling stand to solve the above-mentioned problems that the gripping part of the existing blood sampling stand is often a horizontal bar, and small and medium-sized primates instinctively grasp with their palms facing downward, which is not conducive to the exposure of arm blood vessels; and the gripping position cannot be flexibly adjusted according to the length of the primate's arm.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A simple primate blood sampling stand comprises a lifting frame installed on the outside of an iron fence, and a lifting mechanism, an extension tube, a curved slide and a holding mechanism installed on the lifting frame, wherein the lifting mechanism is slidably connected to the lifting frame and can be lifted and lowered along the lifting frame; the extension tube is fixedly installed on the lifting mechanism and can be lifted and lowered along the lifting frame, and the extension tube is used to place the arm of a primate; the curved slide is slidably connected to the extension tube and can adjust the distance from the iron fence; the holding mechanism is fixedly installed on the curved slide and slides along the extension tube along with the curved slide;

[0009] The extending tube is raised and lowered along the lifting frame to meet the needs of primates of different heights; the arc-shaped slide plate slides along the extending tube to meet the needs of primates with different arm lengths; the holding mechanism is used for the primate to grasp when drawing blood, which is conducive to exposing the blood vessels in the arm.

[0010] As a further solution of the utility model: the extending tube is a cylindrical structure with both axial ends open, and the top is cut off to facilitate blood collection, second slide grooves are opened on both sides of the top of the extending tube, and the arc-shaped slide plate is an arc-shaped bent plate, and is slidably connected in the second slide groove through a slider, and the arc-shaped slide plate can also restrain the arms of primates.

[0011] As a further solution of the utility model: the holding mechanism includes a shell, a driving block, a driving spring, a holding rod and a fixing part, wherein: the shell is fixedly mounted on the top of the arc-shaped slide plate; the driving block is slidably connected in the shell, and is used to drive the holding rod; the holding rod is fixedly mounted on the driving block, and passes through a through hole provided on the arc-shaped slide plate, and extends out of the extending tube; the driving spring is fixedly mounted between the driving block and the inner wall of the shell, and is used to drive the driving block; the fixing part is sleeved on the holding rod and is located between the arc-shaped slide plate and the extending tube.

[0012] As a further solution of the utility model: a first sliding groove and a fixed groove are provided on the extending tube, the first sliding groove is for the holding rod to slide along the extending tube, the fixed groove is located above the first sliding groove and is provided with a plurality of the fixed grooves, the fixed grooves match the fixing parts, and the fixing parts are inserted into the fixing grooves to fix the holding mechanism moved into place for use by the corresponding primates.

[0013] As a further solution of the utility model: the holding mechanism also includes a pull rod, a pull ring, a limit block and a protective cover, wherein: the pull rod is fixedly mounted on the end of the driving block away from the holding rod, and is inserted in the driving spring; the pull ring is fixedly mounted on the end of the pull rod extending out of the outer shell, and is used to drive the pull rod; the limit block is fixedly mounted on the end of the holding rod and is located at the lower end of the extending tube, and the limit block is used to prevent the holding rod from detaching from the extending tube; the protective cover is covered on the holding rod to prevent damage to the palm of the primate.

[0014] As a further solution of the utility model: a lifting cavity and a lifting slot are opened in the lifting frame, the lifting slot is vertically connected with the lifting cavity, and the lifting slot is respectively located at the end close to the iron fence and the end away from the iron fence; a rack is provided on the side of the lifting frame away from the iron fence.

[0015] As a further solution of the utility model: the lifting mechanism includes a lifting slider, a bracket, a screw, a rotating shaft and a turntable, wherein: the lifting slider is slidably connected in the lifting cavity, and the lifting slider is used to carry the bracket; the bracket is used to carry the extending tube, and the lifting slider drives the extending tube to lift and lower along the lifting frame through the bracket; the screw is threadedly connected in the lifting slider and is located in the lifting groove; one end of the rotating shaft is fixedly connected to the screw, and the other end is fixedly connected to the turntable.

[0016] As a further solution of the utility model: the lifting mechanism also includes a fixed block and a tooth groove, wherein: the fixed block is rotatably connected to the rotating shaft, and the side of the fixed block close to the lifting frame is provided with a tooth groove corresponding to and matching the rack; the turntable drives the screw rod to screw into the lifting slider through the rotating shaft to drive the fixed block close to the lifting frame, and the rack is inserted into the tooth groove, the lifting slider is fixed to the lifting frame, and the lifting mechanism and the height of the extension tube are fixed, and the outer side of the iron fence is covered with an isolation net.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The turntable in the utility model can drive the screw to spirally leave the lifting slider through the rotating shaft, and drive the rack to leave the tooth groove at the same time, so as to facilitate the subsequent flexible change of the height of the lifting slider, and then drive the extension tube to rise and fall along the lifting frame through the bracket to meet the needs of primates of different heights; when the height of the extension tube is adjusted to the right position, the turntable drives the screw to spirally push into the lifting slider through the rotating shaft, and drives the rack to engage with the tooth groove to fix the lifting slider in the lifting cavity, so as to fix the height of the extension tube and prevent the sudden change of the height of the extension tube from affecting the blood collection of the primate.

[0019] The extending tube in the utility model is a cylindrical structure with both axial ends open and the top cut off, which is convenient for collecting blood from the arm of the primate placed in the extending tube; the arcuate slide plate is an arcuate bent plate, and is slidably connected to the second slide groove through the slider, which can not only restrain the primate's arm, but also can be adjusted for primates with different arm lengths.

[0020] The setting of the holding rod in the utility model enables the primate placed on the extending tube to grasp it so that the blood vessels in the arm are exposed; the driving spring can drive the holding rod to move in the direction of the extending tube through the driving block, so that the fixing piece is inserted into the fixing groove, and the holding mechanism moved into place is fixed to provide grasping for the primate with the corresponding arm length; the setting of the first sliding groove allows the holding rod to slide along the extending tube, which is convenient for adjustment according to the primates with different arm lengths. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0022] Figure 2 It is a partial three-dimensional structural schematic diagram of the utility model;

[0023] Figure 3 It is a partial structural schematic diagram of the utility model;

[0024] Figure 4 It is a structural schematic diagram of another viewing angle in the utility model.

[0025] In the figure: 1. iron fence; 2. lifting frame; 21. lifting chamber; 22. lifting slot; 23. rack; 3. lifting mechanism; 31. lifting slider; 32. bracket; 33. screw; 34. rotating shaft; 35. turntable; 36. fixed block; 37. tooth groove; 4. extending cylinder; 41. first slide groove; 42. fixed groove; 43. second slide groove; 5. arc slide plate; 51. slider; 52. through hole; 6. holding mechanism; 61. shell; 62. driving block; 63. pull rod; 64. pull ring; 65. driving spring; 66. holding rod; 67. fixing piece; 68. limit block; 69. protective cover; 7. isolation net. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] This embodiment;

[0028] A simple primate blood collection stand, please refer to Figure 1-Figure 4 It includes a lifting frame 2 installed on the outside of an iron fence 1, and a lifting mechanism 3, an extending tube 4, an arc-shaped slide plate 5 and a holding mechanism 6 installed on the lifting frame 2. The outside of the iron fence 1 is covered with an isolation net 7.

[0029] In some examples, reference Figure 1-4 As shown, a lifting cavity 21 and a lifting slot 22 are provided in the lifting frame 2. The lifting slot 22 is vertically connected with the lifting cavity 21, and the lifting slot 22 is respectively located at the end close to the iron fence 1 and the end away from the iron fence 1; a rack 23 is provided on the side of the lifting frame 2 away from the iron fence 1.

[0030] Through the above technical scheme, in the utility model, the lifting groove 22 is designed to be located near the end of the iron fence 1, which makes it convenient for the primate's arm to pass through the iron fence 1 and the lifting frame 2 and enter the extended tube 4 for blood collection; the setting of the lifting chamber 21 makes it convenient for the lifting mechanism 3 to lift and lower along the lifting frame 2 and adjust the height of the extended tube 4 to meet the needs of primates of different heights.

[0031] In some examples, reference Figure 1-4 As shown, the lifting mechanism 3 is slidably connected to the lifting frame 2 and can be lifted and lowered along the lifting frame 2; the lifting mechanism 3 includes a lifting slider 31, a bracket 32, a screw 33, a rotating shaft 34 and a turntable 35, wherein: the lifting slider 31 is slidably connected in the lifting chamber 21, and the lifting slider 31 is used to carry the bracket 32; the bracket 32 ​​is used to carry the extending tube 4, and the lifting slider 31 drives the extending tube 4 to be lifted and lowered along the lifting frame 2 through the bracket 32; the screw 33 is threadedly connected in the lifting slider 31 and is located in the lifting slot 22; one end of the rotating shaft 34 is fixedly connected to the screw 33, and the other end is fixedly connected to the turntable 35.

[0032] In some examples, reference Figure 1-4 As shown, the lifting mechanism 3 also includes a fixed block 36 and a tooth groove 37, wherein: the fixed block 36 is rotatably connected to the rotating shaft 34, and the side of the fixed block 36 close to the lifting frame 2 is provided with a tooth groove 37 corresponding to and matching the rack 23; the turntable 35 drives the screw 33 to screw into the lifting slider 31 through the rotating shaft 34, so as to drive the fixed block 36 to approach the lifting frame 2, and make the rack 23 inserted into the tooth groove 37, so as to fix the lifting slider 31 to the lifting frame 2, thereby realizing the fixing of the lifting mechanism 3 and the height of the extension tube 4.

[0033] Through the above technical scheme, the turntable 35 in the utility model can drive the screw 33 to spirally leave the lifting slider 31 through the rotating shaft 34, and at the same time drive the rack 23 to leave the tooth groove 37, so as to facilitate the subsequent flexible change of the height of the lifting slider 31, and then drive the extending tube 4 to rise and fall along the lifting frame 2 through the bracket 32 ​​to meet the needs of primates of different heights; when the height of the extending tube 4 is adjusted to the right position, the turntable 35 drives the screw 33 to spirally push into the lifting slider 31 through the rotating shaft 34, and at the same time drives the rack 23 to engage with the tooth groove 37, fixing the lifting slider 31 to the lifting chamber 21, thereby fixing the height of the extending tube 4 and preventing the sudden change in the height of the extending tube 4 from affecting the collection of blood from primates.

[0034] In some examples, reference Figure 1-4As shown, the extending tube 4 is fixedly installed on the lifting mechanism 3 and is lifted and lowered along the lifting frame 2. The extending tube 4 is lifted and lowered along the lifting frame 2 to meet the needs of primates of different heights; the extending tube 4 is used to place the arms of primates; the extending tube 4 is a tubular structure with both ends of the axial direction open, and the top is cut off to facilitate blood collection, and second slide grooves 43 are provided on both sides of the top of the extending tube 4. The arc slide 5 is an arc bent plate, and is slidably connected in the second slide groove 43 through a slider 51. The arc slide 5 is slidably connected to the extending tube 4, and the distance from the iron fence 1 can be adjusted to meet the needs of primates with different arm lengths. The arc slide 5 can also restrain the primate's arms.

[0035] Through the above technical scheme, the extending tube 4 in the utility model is a cylindrical structure with both axial ends open and the top cut off, which is convenient for collecting blood from the arm of the primate placed in the extending tube 4; the arcuate slide plate 5 is an arcuate bent plate, and is slidably connected to the second slide groove 43 through the slider 51, which can not only restrain the primate's arm, but also can be adjusted for primates with different arm lengths.

[0036] In some examples, reference Figure 1-4 As shown, the holding mechanism 6 is fixedly mounted on the arc-shaped slide plate 5 and slides along the extending tube 4 along with the arc-shaped slide plate 5; the holding mechanism 6 is used for the primate to grasp when drawing blood, which is beneficial to the exposure of the blood vessels in the arm.

[0037] Through the above technical scheme, the holding mechanism 6 in the utility model can enable the primate placed on the extending tube 4 to grasp so that the blood vessels in the arm are exposed, which is convenient for the staff to collect blood and avoids the animal's instinctive grasping with the palm facing down, which is not conducive to the exposure of the blood vessels in the arm.

[0038] In some examples, reference Figure 1-4 As shown, the holding mechanism 6 includes a shell 61, a driving block 62, a driving spring 65, a holding rod 66 and a fixing member 67, wherein: the shell 61 is fixedly mounted on the top of the arc-shaped slide 5; the driving block 62 is slidably connected in the shell 61, and is used to drive the holding rod 66; the holding rod 66 is fixedly mounted on the driving block 62, and passes through the through hole 52 opened on the arc-shaped slide 5, and extends out of the protruding tube 4; the driving spring 65 is fixedly mounted between the driving block 62 and the inner wall of the shell 61, and is used to drive the driving block 62; the fixing member 67 is sleeved on the holding rod 66 and is located between the arc-shaped slide 5 and the protruding tube 4.

[0039] In some examples, reference Figure 1-4As shown, a first slide groove 41 and a fixed groove 42 are provided on the extending tube 4. The first slide groove 41 is for the holding rod 66 to slide along the extending tube 4. The fixed groove 42 is located above the first slide groove 41 and is provided with a plurality of fixed grooves 42. The fixed groove 42 matches with the fixing member 67. The fixing member 67 is inserted into the fixing groove 42 to fix the holding mechanism 6 moved into place for use by the corresponding primate.

[0040] Through the above technical scheme, the setting of the holding rod 66 in the utility model enables the primate placed on the extending tube 4 to grasp it, so that the blood vessels in the arm are exposed; the driving spring 65 can drive the holding rod 66 to move in the direction of the extending tube 4 through the driving block 62, so that the fixing member 67 is inserted into the fixing groove 42, and the holding mechanism 6 moved into place is fixed for the primate with the corresponding arm length to grasp it; the setting of the first sliding groove 41 can make the holding rod 66 slide along the extending tube 4, which is convenient for adjustment according to primates with different arm lengths.

[0041] In some examples, reference Figure 1-4 As shown, the holding mechanism 6 also includes a pull rod 63, a pull ring 64, a limit block 68 and a protective cover 69, wherein: the pull rod 63 is fixedly mounted on the end of the driving block 62 away from the holding rod 66, and is inserted in the driving spring 65; the pull ring 64 is fixedly mounted on the end of the pull rod 63 extending out of the outer shell 61, and is used to drive the pull rod 63; the limit block 68 is fixedly mounted on the end of the holding rod 66 and is located at the lower end of the extending tube 4, and the limit block 68 is used to prevent the holding rod 66 from detaching from the extending tube 4; the protective cover 69 is covered on the holding rod 66 to prevent injury to the palm of the primate.

[0042] Through the above technical scheme, the pull ring 64 in the utility model can drive the driving block 62 to slide in the opposite direction through the pull rod 63, and at the same time compress the driving spring 65 to drive the holding rod 66 to move in the opposite direction of the extending tube 4, so that the fixing part 67 is disengaged from the fixing groove 42, which is convenient for changing the position of the arc-shaped slide plate 5 and the holding mechanism 6 to meet the needs of primates with different arm lengths; the setting of the limit block 68 can prevent the holding rod 66 from being disengaged from the extending tube 4; the protective cover 69 can protect the palm of the primate.

[0043] The working principle of the utility model is as follows: when it is necessary to draw blood from primates of different heights, the rotating shaft 34 is driven to rotate by the rotating disk 35, and the rotating shaft 34 drives the screw 33 to spirally leave the lifting slider 31, and at the same time, drives the rack 23 to leave the tooth groove 37, and then changes the height of the lifting slider 31 to adjust the height of the extended tube 4. After the adjustment is in place, the rotating disk 35 is rotated in the opposite direction, and the rotating shaft 34 drives the screw 33 to be screwed into the lifting slider 31, and at the same time, drives the rack 23 to be inserted into the tooth groove 37, and fixes the lifting slider 31 into the lifting cavity 21 to fix the height of the extended tube 4.

[0044] When it is necessary to draw blood from primates with different arm lengths, first, pull the pull rod 63 through the pull ring 64, and the pull rod 63 drives the holding rod 66 to move in the opposite direction of the extending tube 4 through the driving block 62, and at the same time compresses the driving spring 65, driving the fixing part 67 to disengage from the fixing groove 42, and then the arc-shaped slide plate 5 and the holding mechanism 6 can be driven to slide along the extending tube 4. When adjusted to the right position, release the pull ring 64, and the driving spring 65 drives the holding rod 66 to move in the direction of the extending tube 4 through the driving block 62, and at the same time drives the fixing part 67 to be inserted into the fixing groove 42, so that the arc-shaped slide plate 5 and the holding mechanism 6 are fixed to the extending tube 4.

[0045] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A simple primate blood sampling stand, comprising a lifting frame (2) installed outside an iron fence (1), and a lifting mechanism (3), an extension tube (4), a curved slide plate (5) and a holding mechanism (6) installed on the lifting frame (2), characterized in that: The lifting mechanism (3) is slidably connected to the lifting frame (2) and can be lifted and lowered along the lifting frame (2); the extending tube (4) is fixedly mounted on the lifting mechanism (3) and can be lifted and lowered along the lifting frame (2), and the extending tube (4) is used to place the arm of the primate; the arc-shaped slide plate (5) is slidably connected to the extending tube (4) and can adjust the distance from the iron fence (1); the holding mechanism (6) is fixedly mounted on the arc-shaped slide plate (5) and can slide along the extending tube (4) along with the arc-shaped slide plate (5); The extending tube (4) is raised and lowered along the lifting frame (2) to meet the needs of primates of different heights; the arc-shaped slide plate (5) slides along the extending tube (4) to meet the needs of primates with different arm lengths; the holding mechanism (6) is used for the primate to grasp when drawing blood, which is conducive to exposing the blood vessels in the arm.

2. A simple primate blood sampling stand according to claim 1, characterized in that: The extending tube (4) is a cylindrical structure with both ends of the axial direction open, and the top is cut off to facilitate blood collection. Second slide grooves (43) are opened on both sides of the top of the extending tube (4). The arc-shaped slide plate (5) is an arc-shaped bent plate and is slidably connected in the second slide groove (43) through a slider (51). The arc-shaped slide plate (5) can also restrain the arm of the primate.

3. A simple primate blood sampling stand according to claim 2, characterized in that: The holding mechanism (6) comprises a housing (61), a driving block (62), a driving spring (65), a holding rod (66) and a fixing member (67), wherein: The housing (61) is fixedly mounted on the top of the arc-shaped slide plate (5); The driving block (62) is slidably connected in the housing (61) and is used to drive the holding rod (66); The holding rod (66) is fixedly mounted on the driving block (62), passes through a through hole (52) provided on the arc-shaped slide plate (5), and extends out of the extension tube (4); The driving spring (65) is fixedly installed between the driving block (62) and the inner wall of the housing (61), and is used to drive the driving block (62); The fixing member (67) is sleeved on the holding rod (66) and is located between the arc-shaped slide plate (5) and the extending tube (4).

4. A simple primate blood sampling stand according to claim 3, characterized in that: The extending tube (4) is provided with a first slide groove (41) and a fixed groove (42), wherein the first slide groove (41) allows the holding rod (66) to slide along the extending tube (4), and the fixed groove (42) is located above the first slide groove (41) and is provided with a plurality of fixed grooves (42), wherein the fixed groove (42) matches the fixing member (67), and the fixing member (67) is inserted into the fixing groove (42) to fix the holding mechanism (6) moved into place for use by the corresponding primate.

5. A simple primate blood sampling stand according to claim 4, characterized in that: The holding mechanism (6) further comprises a pull rod (63), a pull ring (64), a limit block (68) and a protective sleeve (69), wherein: The pull rod (63) is fixedly mounted on the end of the driving block (62) away from the holding rod (66), and is inserted into the driving spring (65); The pull ring (64) is fixedly mounted on the end of the pull rod (63) extending out of the housing (61), and is used to drive the pull rod (63); The limit block (68) is fixedly mounted on the end of the holding rod (66) and is located at the lower end of the extending tube (4), and the limit block (68) is used to prevent the holding rod (66) from being separated from the extending tube (4); The protective sleeve (69) covers the holding rod (66) to prevent the palm of the primate from being injured.

6. A simple primate blood sampling stand according to claim 5, characterized in that: The lifting frame (2) is provided with a lifting cavity (21) and a lifting slot (22), the lifting slot (22) vertically penetrates the lifting cavity (21), and the lifting slot (22) is respectively located at an end close to the iron fence (1) and an end away from the iron fence (1); a rack (23) is provided on the side of the lifting frame (2) away from the iron fence (1).

7. A simple primate blood sampling stand according to claim 6, characterized in that: The lifting mechanism (3) comprises a lifting slider (31), a bracket (32), a screw (33), a rotating shaft (34) and a rotating disk (35), wherein: The lifting slider (31) is slidably connected in the lifting cavity (21), and the lifting slider (31) is used to carry the bracket (32); The support (32) is used to carry the extending tube (4), and the lifting slider (31) drives the extending tube (4) to rise and fall along the lifting frame (2) through the support (32); The screw rod (33) is threadedly connected to the lifting slider (31) and is located in the lifting slot (22); One end of the rotating shaft (34) is fixedly connected to the screw rod (33), and the other end is fixedly connected to the rotating disk (35).

8. A simple primate blood sampling stand according to claim 7, characterized in that: The lifting mechanism (3) further comprises a fixing block (36) and a tooth groove (37), wherein: The fixing block (36) is rotatably connected to the rotating shaft (34), and a tooth groove (37) corresponding to and matching the rack (23) is provided on a side of the fixing block (36) close to the lifting frame (2); The rotating disk (35) drives the screw rod (33) to screw into the lifting slider (31) through the rotating shaft (34), so as to drive the fixing block (36) to approach the lifting frame (2), and to insert the rack (23) into the tooth groove (37), so as to fix the lifting slider (31) to the lifting frame (2), thereby achieving the fixing of the height of the lifting mechanism (3) and the extending cylinder (4); The outer side of the iron fence (1) is covered with an isolation net (7).

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