Adjusting mechanism and hard fence

Abstract

The utility model discloses an adjusting mechanism and a hard fence, and relates to the technical field of fence installation. Comprising a connecting plate, a fixed connecting cylinder arranged on the surface of the connecting plate, a movable connecting cylinder arranged on one side of the fixed connecting cylinder, a rotating column arranged on the inner side of the movable connecting cylinder, an extrusion block arranged at the end of the rotating column, a connecting rod piece arranged on the inner side of the rotating column, a hinge seat arranged at the end of the connecting rod piece and a fixed block arranged on the outer side of the hinge seat. The fence has the advantages that the positions of the movable connecting cylinders and the fixed connecting cylinders can be adjusted more flexibly through the connecting units, workers can connect the two adjacent fence bodies more conveniently, and the movable adjustable pressing plate type fixing is adopted; and the manufacturing deviation of the fence and the deviation of the ground prefabricated part fixing assembly can be flexibly adjusted, installation is not affected, and universality is high.

Description

Technical Field

[0001] The utility model relates to the technical field of fence installation, in particular to an adjustment mechanism and a hard fence. Background Art

[0002] Hard fence is a common safety device used to protect electrical equipment such as power plants and substations to ensure the safety of personnel and equipment; the materials of hard fence include insulated tube fence, insulated sheet fence, stainless steel fence, etc. These materials are hard, durable and have strong protective capabilities.

[0003] There are many disadvantages in the existing installation methods of hard fences. The placement installation method is easy to move when subjected to external force, which can only serve as a warning but not a real safety protection. The ground hole plug-in installation method is adopted, and the ground hole is not beautiful. The hole center distance requirement is high and cannot be adjusted. The fence cannot be installed if there is a slight deviation. Due to the certain gap between the fence column and the ground hole, the fence shakes slightly after installation, and adjacent fence pieces cannot be aligned. The overall appearance is not beautiful and standardized. There are many problems in the installation process of existing hard fences, and it is inconvenient for operators to use them. Utility Model Content

[0004] In view of the above-mentioned prior art problems, the present utility model is proposed.

[0005] The utility model aims to provide an adjustment mechanism, which aims to solve the problem that the existing hard fence has many disadvantages during installation and the operators are inconvenienced during the installation process.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: an adjusting mechanism, comprising a connecting unit, including a connecting plate, a fixed connecting cylinder arranged on the surface of the connecting plate, a movable connecting cylinder arranged on one side of the fixed connecting cylinder, a rotating column arranged on the inner side of the movable connecting cylinder, an extrusion block arranged at the end of the rotating column, a connecting rod arranged on the inner side of the rotating column, an articulated seat arranged at the end of the connecting rod, and a fixed block arranged on the outer side of the articulated seat.

[0007] As a preferred solution of the adjustment mechanism of the utility model, wherein: the rotating column includes a sliding frame arranged at its end, and a hinge plate arranged inside the rotating column;

[0008] The movable connection cylinder includes a connection sleeve arranged on its side wall;

[0009] The connecting sleeve is sleeved on the outside of the rotating column; the connecting sleeve rotates around the outer wall of the rotating column.

[0010] As a preferred solution of the adjustment mechanism of the utility model, wherein: the extrusion block includes a slider arranged on its side wall, and a first tension spring arranged at the end of the extrusion block;

[0011] The sliding frame includes a slide rail arranged on the inner wall thereof;

[0012] The slide block is matched with the slide rail; one end of the first tension spring is fixed to the inner wall of the slide frame.

[0013] As a preferred solution of the adjustment mechanism of the utility model, wherein: the connecting rod comprises a first rotating shaft arranged on both sides thereof, a protruding block arranged at one end of the connecting rod, a second rotating shaft arranged on both sides of the end of the connecting rod, and a torsion spring arranged outside the first rotating shaft;

[0014] The hinge plate is matched with the first rotating shaft; the first rotating shaft rotates inside the hinge plate.

[0015] As a preferred solution of the adjustment mechanism of the utility model, wherein: the connecting sleeve includes a limiting groove arranged inside it; the protruding block includes a limiting tooth arranged at its end; the limiting groove is matched with the limiting tooth.

[0016] As a preferred solution of the adjustment mechanism of the utility model, wherein: the fixing block includes a slot arranged inside the fixing block, and a slideway arranged on one side of the slot;

[0017] The hinge seat includes a second tension spring arranged at an end thereof;

[0018] The end of the second tension spring is fixed to the inner wall of the slideway; the hinge seat is adapted to the second rotating shaft.

[0019] As a preferred solution of the adjustment mechanism of the utility model, wherein: the fixed block passes through the rotating column and extends to its outside; the extrusion block is adapted to the slot; the hinge seat is adapted to the slide; and the hinge seat slides along the inside of the slide.

[0020] The beneficial effects of the adjustment mechanism of the utility model are: through the provided connection unit, the positions of the movable connection cylinder and the fixed connection cylinder can be adjusted more flexibly, which makes it easier for the staff to connect two adjacent groups of fences. The movable adjustable pressure plate type fixation is adopted, and the production deviation of the fence and the deviation of the ground prefabricated fixing assembly can be flexibly adjusted without affecting the installation, and the versatility is high.

[0021] Another object of the utility model is to provide a hard fence, which aims to solve the problem that the existing hard fence needs to open a hole in the ground during the installation process, which is unsightly and inconvenient during the installation process.

[0022] In order to solve the above technical problems, the utility model also provides the following technical solutions: a hard fence, which includes an adjustment mechanism; and a mounting ground; a fence body, including a fence board, and connecting columns arranged on both sides of the fence board;

[0023] A fixing bolt; an embedded unit, comprising a fixing plate, a threaded connection sleeve disposed on the surface of the fixing plate, and expansion bolts disposed on both sides of the threaded connection sleeve; a pre-connector;

[0024] The threaded connection sleeve and the connection plate are connected and fixed by the fixing bolts; and the embedded unit is arranged inside the installation ground.

[0025] As a preferred solution of the hard fence of the utility model, wherein: the connecting plate includes a waist hole arranged on its end surface;

[0026] The fixing bolt is threadably matched with the threaded connection sleeve; the fixing bolt passes through the waist hole and extends to the outside thereof; the fixing bolt presses the connecting plate onto the upper surface of the installation ground and fixes it.

[0027] As a preferred solution of the hard fence of the utility model, wherein: the connecting column is respectively adapted to the fixed connecting tube and the movable connecting tube; the connecting unit connects the bottoms of two adjacent groups of the fence bodies; and the pre-connecting piece connects the tops of two adjacent groups of the fence bodies.

[0028] The beneficial effects of the hard fence of the utility model are: after installation, the device is overall stable, safe and reliable, can play an effective safety protection role, the reserved fixing holes on the ground leave small marks, and are equipped with end covers of the same color as the ground. The overall appearance is consistent and beautiful, and a single bolt can be used for fixing during the installation process, which makes the operation simpler and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a structural schematic diagram of the utility model.

[0031] Figure 2 It is a schematic diagram of the connection structure between the fence body and the embedded unit in the utility model.

[0032] Figure 3It is a schematic diagram of the connection structure between the connection unit and the embedded unit in the utility model.

[0033] Figure 4 It is a schematic diagram of the connection unit structure in the utility model.

[0034] Figure 5 It is a partial cross-sectional view of the connection unit in the utility model.

[0035] Figure 6 For the utility model Figure 5 A is a partial enlarged view of the DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0039] Example 1

[0040] Reference Figure 1 to Figure 6 , is the first embodiment of the utility model, which provides an adjustment mechanism, including a connecting unit 200, including a connecting plate 201, a fixed connecting cylinder 202 arranged on the surface of the connecting plate 201, a movable connecting cylinder 203 arranged on one side of the fixed connecting cylinder 202, a rotating column 204 arranged on the inner side of the movable connecting cylinder 203, an extrusion block 205 arranged at the end of the rotating column 204, a connecting rod 207 arranged on the inner side of the rotating column 204, a hinge seat 206 arranged at the end of the connecting rod 207, and a fixed block 208 arranged on the outer side of the hinge seat 206.

[0041] Preferably, the connecting plate 201 is fixedly connected to the fixed connecting cylinder 202, and the interior of the fixed connecting cylinder 202 is a hollow structure, which can reduce the material used for the equipment; the fixed connecting cylinder 202 is arranged opposite to the movable connecting cylinder 203; the rotating column 204 is welded and fixed to the connecting plate 201; the movable connecting cylinder 203 rotates along the axial direction of the rotating column 204; the position between the fixed connecting cylinder 202 and the movable connecting cylinder 203 can be adjusted by rotating the movable connecting cylinder 203, so as to facilitate the connection between two adjacent groups of hard fences; the movement of the extrusion block 205 can push the fixed block 208 to move, and the fixed block 208 moves along the inner side of the extrusion block 205; the movement of the fixed block 208 drives the connecting rod 207 to move, so that the connecting rod 207 is hinged and rotated along the rotating column 204, and the connecting rod 207 rotates, so that the connecting rod 207 gradually moves away from the inner end of the movable connecting cylinder 203, thereby releasing the fixation between the movable connecting cylinder 203 and the rotating column 204.

[0042] When in use, under normal circumstances, the end of the connecting rod 207 is engaged with the movable connection cylinder 203, thereby fixing the position of the movable connection cylinder 203 and the fixed connection cylinder 202. When the position of the movable connection cylinder 203 needs to be adjusted, the extrusion block 205 is pressed to move, and the movement of the extrusion block 205 drives the fixed block 208 to move, so that the fixed block 208 moves along the inner wall of the extrusion block 205, and the extrusion block 205 moves upward to drive the hinge seat 206 to move, so that the hinge seat 206 drives the connecting rod 207 to rotate along the inside of the rotating column 204, so that the end of the connecting rod 207 gradually moves away from the movable connection cylinder 203, thereby making it easier for the staff to rotate the movable connection cylinder 203, so that the movable connection cylinder 203 can better adjust its position, thereby facilitating the operator to connect adjacent hard fences.

[0043] In summary, by cooperating between the set connecting piece 207 and the movable connecting cylinder 203, the position between the connecting piece 207 and the rotating column 204 can be better adjusted, thereby changing the position between the movable connecting cylinder 203 and the fixed connecting cylinder 202, which can be better suitable for the connection between two adjacent groups of hard fences, making the device more flexible to operate and more convenient for operators to use.

[0044] Example 2

[0045] Reference Figure 1 to Figure 6 , which is the second embodiment of the utility model, includes: the rotating column 204 includes a sliding frame 204a arranged at its end, and a hinge plate 204b arranged on the inner side of the rotating column 204; the movable connecting cylinder 203 includes a connecting sleeve 203a arranged on its side wall; the connecting sleeve 203a is sleeved on the outer side of the rotating column 204; the connecting sleeve 203a rotates around the outer wall of the rotating column 204.

[0046] Preferably, the sliding frame 204a is fixedly connected between the ends of the rotating column 204; the hinged plate 204b is fixedly connected between the inner walls of the rotating column 204; the connecting sleeve 203a is fixedly connected along the outer wall of the movable connecting tube 203, the connecting sleeve 203a is arranged on the outside of the rotating column 204, and the connecting sleeve 203a rotates along the outside of the rotating column 204.

[0047] Furthermore, the extrusion block 205 includes a slider 205a arranged on its side wall, and a first tension spring 205b arranged on the end of the extrusion block 205; the sliding frame 204a includes a slide rail 204a-1 arranged on its inner wall; the slider 205a is adapted to the slide rail 204a-1; one end of the first tension spring 205b is fixed between the inner wall of the sliding frame 204a.

[0048] Preferably, the slider 205a is welded and fixed to the extrusion block 205, and the extrusion block 205 is a trapezoidal structure; the extrusion block 205 is arranged on the inner side of the sliding frame 204a, and the slider 205a slides along the inner wall of the slide rail 204a-1; the first tension spring 205b is arranged to drive the extrusion block 205 to reset, and one end of the first tension spring 205b is connected to the end of the extrusion block 205, and the other end of the first tension spring 205b is connected to the inner wall of the sliding frame 204a.

[0049] Furthermore, the connecting rod member 207 includes a first rotating shaft 207a arranged on both sides thereof, a protruding block 207b arranged at one end of the connecting rod member 207, a second rotating shaft 207c arranged on both sides of the end of the connecting rod member 207, and a torsion spring 207d arranged on the outside of the first rotating shaft 207a; the hinge plate 204b is adapted to the first rotating shaft 207a; the first rotating shaft 207a rotates on the inner side of the hinge plate 204b.

[0050] Preferably, the first rotating shaft 207a is located inside the hinge plate 204b and rotates; so that the end movement of the second rotating shaft 207c can drive the connecting rod 207 to rotate along the axial direction of the first rotating shaft 207a, thereby causing the end of the protruding block 207b to flip and move; the torsion spring 207d can drive the connecting rod 207 to reset, so that the protruding block 207b can contact the inner side of the connecting sleeve 203a.

[0051] Furthermore, the connecting sleeve 203a includes a limiting groove 203a-1 arranged inside thereof; the protruding block 207b includes a limiting tooth 207b-1 arranged at an end thereof; the limiting groove 203a-1 is adapted to the limiting tooth 207b-1.

[0052] Preferably, the limiting groove 203a-1 and the limiting tooth 207b-1 are adapted to each other; the setting of the limiting groove 203a-1 and the limiting tooth 207a-1 can better fix the position between the connecting rod 207 and the movable connecting cylinder 203, thereby fixing the position between the movable connecting cylinder 203 and the connecting plate 201.

[0053] Furthermore, the fixed block 208 includes a slot 208a arranged inside it, and a slide 208b arranged on one side of the slot 208a; the hinge seat 206 includes a second tension spring 206a arranged at its end; the end of the second tension spring 206a is fixed to the inner wall of the slide 208b; the hinge seat 206 is adapted to the second rotating shaft 207c.

[0054] Preferably, the fixed block 208 passes through the rotating column 204 and extends to the outside, the slot 208a cooperates with the extrusion block 205, the slide 208b cooperates with the hinge seat 206, the hinge seat 206 slides along the inside of the slide 208b, and the hinge seat 206 is hinged and rotated with the second rotating shaft 207c. The movement of the fixed block 208 drives the hinge seat 206 to move, and the movement of the fixed block 208 drives the connecting rod 207 to flip, and the connecting rod 207 flips while driving the hinge seat 206 to move, so that the hinge seat 206 can move along the inner wall of the slide 208b.

[0055] Furthermore, the fixing block 208 penetrates the rotating column 204 and extends to the outside thereof; the extrusion block 205 is matched with the slot 208a; the hinge seat 206 is matched with the slideway 208b; and the hinge seat 206 slides along the inside of the slideway 208b.

[0056] Preferably, the fixed block 208 slides along the inside of the rotating column 204, and the movement of the rotating column 204 drives the connecting rod 207 to flip along the axial direction of the hinge plate 204b. The fixed block 208 flips and drives the connecting rod 207 to flip at the same time, so that the connecting rod 207 squeezes the hinge seat 206 during the movement, so that the hinge seat 206 moves to the inside of the slide 208b, and the limiting tooth 207b-1 can cooperate with the limiting groove 203a-1, so that the position between the connecting rod 207 and the movable connecting cylinder 203 is fixed.

[0057] During use, when the operator needs to adjust the position of the movable connecting cylinder 203 to facilitate the connection of two sets of adjacent fences, the operator presses the extrusion block 205, so that the sliders 205a set on both sides of the extrusion block 205 slide along the inside of the slide rail 204a-1, and the ends of the extrusion block 205 are inserted into the inner side of the slot 208a. As the extrusion block 205 continues to go deeper, the fixed block 208 is gradually lifted up, and the movement of the fixed block 208 drives the hinge seat 206 to move. During the movement, the hinge seat 206 drives the connecting rod 207 to move, so that the second rotating shaft 207c rotates along the axial direction of the hinge seat 206. As the hinge seat 206 moves, the connecting rod 207 rotates along the direction of the axial hole opened in the hinge plate 204b; during the flipping process of the connecting rod 207, the protruding block 207b is driven to move. When the connecting rod 207 flips, the second rotating shaft 207c squeezes the hinge seat to one side. The connecting seat 206 makes the hinged seat 206 slide along the track inside the slideway 208b; as the connecting rod 207 rotates, the limiting tooth 207b-1 moves away from the limiting groove 203a-1, and as the connecting rod 207 rotates; the first rotating shaft 207a gradually compresses the torsion spring 207d, and the movable connecting cylinder 203 is rotated at this time, and the movable connecting cylinder 203 is rotated to a suitable position, and then the hand pressing the extrusion block 205 is released, and under the action of the first tension spring 205b and the torsion spring 207d rebound force, the extrusion block 205 and the connecting rod 207 are driven to reset; the first rotating shaft 207a drives the protruding block 207b to flip, so that the limiting tooth 207b-1 cooperates with the limiting groove 203a-1, thereby fixing the position between the movable connecting cylinder 203 and the connecting rod 207, thereby ensuring that the position between the movable connecting cylinder 203 and the connecting plate 201 is fixed, which is more convenient for operators to install adjacent fences.

[0058] In summary, the positions of the movable connecting cylinder and the fixed connecting cylinder can be adjusted more flexibly through the setting of the connecting unit, which makes it easier for the staff to connect the two adjacent groups of fences. The movable adjustable pressure plate type fixation is adopted, and the production deviation of the fence and the deviation of the ground prefabricated fixing component can be flexibly adjusted without affecting the installation, and the versatility is high.

[0059] Example 3

[0060] Reference Figure 1 to Figure 4 , which is the third embodiment of the utility model, and this embodiment further provides a hard fence, including, an installation ground M; a fence body 100, including a fence plate 101, and connecting columns 102 arranged on both sides of the fence plate 101; fixing bolts 400; an embedded unit 500, including a fixing plate 501, a threaded connection sleeve 502 arranged on the surface of the fixing plate 501, and expansion bolts 503 arranged on both sides of the threaded connection sleeve 502; a pre-connector 600; the threaded connection sleeve 502 and the connecting plate 201 are connected and fixed by fixing bolts 400; the embedded unit 500 is arranged inside the installation ground M.

[0061] Preferably, there are multiple groups of fence bodies 100, and adjacent fence bodies 100 are connected by means of set connection units 200; the set embedded units 500 are installed on the inner side of the installation ground M by pouring; the structure of the pre-connector 600 is the same as that of the connection unit 200, and the pre-connector 600 can connect the top of the hard fence; during the installation of the fence, the installation is convenient, and each group of fixing points only needs one bolt to be tightened and fixed.

[0062] Furthermore, the connecting plate 201 includes a waist hole 201a arranged on its end face; the fixing bolt 400 is threadedly matched with the threaded connecting sleeve 502; the fixing bolt 400 passes through the waist hole 201a and extends to its outside; the fixing bolt 400 presses the above-mentioned connecting plate 201 to the upper surface of the installation ground M and fixes it.

[0063] Preferably, the waist hole 201a is arranged above the position of the threaded connection sleeve 502, and the fixed connection tube 202 and the movable connection tube 203 are respectively arranged on both sides of two adjacent groups of hard fence connecting columns 102; a set of connection units 200 can connect the two groups of hard fences; the connecting plate 201 is placed on the upper surface of the installation ground M, and then it can be threadedly connected between the fixing bolt 400 and the threaded connection sleeve 502, and the connecting plate 201 can be pressed against the upper surface of the installation ground M.

[0064] Furthermore, the connecting column 102 is respectively adapted to the fixed connecting tube 202 and the movable connecting tube 203; the connecting unit 200 connects the bottoms of two adjacent groups of fence bodies 100; and the pre-connecting part 600 connects the tops of two adjacent groups of fence bodies 100.

[0065] Preferably, by setting a fixed connecting tube 202 to be sleeved on the inner side of a group of hard fence connecting columns 102, and a movable connecting tube 203 to be sleeved on the inner side of another group of hard fence connecting columns 102, a group of connecting units 200 can connect two groups of hard fences, and the set pre-connecting parts 600 connect the tops of adjacent hard fences, so that the hard fences can be stably installed on the upper surface of the installation ground M; the set embedded unit 500 has a small mark on the ground reserved fixing hole and is equipped with an end cover of the same color as the ground, which is consistent and beautiful as a whole; the reserved fixing hole is provided with an arc-top cover that is basically flush with the ground, which can effectively protect the thread.

[0066] When in use, the connecting plate 201 is placed at a position corresponding to the installation ground M and the embedded unit 500, and then the fixing bolt 400 is used to penetrate the waist hole 201a and the threaded connection sleeve 502 for threaded connection, so that the connecting plate 201 can be pressed against the upper surface of the installation ground M through the threaded cooperation between the set fixing bolt 400 and the threaded connection sleeve 502; then, by adjusting the position of 203, it can be better suitable for the connection and fixation of two adjacent groups of hard fences; then, in the process of installing the hard fences, the connecting columns 102 on one side of the two adjacent groups of hard fences can be respectively sleeved on the outside of the fixed connection tube 202 and the movable connection tube 203, and then the tops of the adjacent hard fences are connected through the set pre-connecting parts 600; then, multiple groups of hard fences can be connected, thereby achieving a better protective effect.

[0067] In summary, after installation, the device is overall stable, safe and reliable, and can play an effective safety protection role. The reserved fixing holes on the ground leave small marks, and are equipped with end covers of the same color as the ground. The overall look is consistent and beautiful. At the same time, a single bolt can be used for fixing during the installation process, and the operation is simpler and more convenient.

[0068] It is important to note that the above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An adjustment mechanism, characterized in that: include, The connection unit (200) comprises a connection plate (201), a fixed connection cylinder (202) arranged on the surface of the connection plate (201), a movable connection cylinder (203) arranged on one side of the fixed connection cylinder (202), a rotating column (204) arranged on the inner side of the movable connection cylinder (203), an extrusion block (205) arranged at the end of the rotating column (204), a connecting rod (207) arranged on the inner side of the rotating column (204), an articulated seat (206) arranged at the end of the connecting rod (207), and a fixed block (208) arranged on the outer side of the articulated seat (206).

2. The adjustment mechanism according to claim 1, characterized in that: The rotating column (204) comprises a sliding frame (204a) arranged at an end thereof, and a hinge plate (204b) arranged inside the rotating column (204); The movable connection cylinder (203) comprises a connection sleeve (203a) arranged on a side wall thereof; The connecting sleeve (203a) is sleeved on the outside of the rotating column (204); the connecting sleeve (203a) rotates around the outer wall of the rotating column (204).

3. The adjustment mechanism according to claim 2, characterized in that: The extrusion block (205) comprises a slider (205a) arranged on a side wall thereof, and a first tension spring (205b) arranged at an end of the extrusion block (205); The sliding frame (204a) comprises a sliding rail (204a-1) arranged on the inner wall thereof; The sliding block (205a) is matched with the sliding rail (204a-1); one end of the first tension spring (205b) is fixed to the inner wall of the sliding frame (204a).

4. The adjustment mechanism according to claim 3, characterized in that: The connecting rod (207) comprises a first rotating shaft (207a) arranged on both sides thereof, a protruding block (207b) arranged at one end of the connecting rod (207), a second rotating shaft (207c) arranged on both sides of the end of the connecting rod (207), and a torsion spring (207d) arranged outside the first rotating shaft (207a); The hinge plate (204b) is adapted to the first rotating shaft (207a); the first rotating shaft (207a) rotates inside the hinge plate (204b).

5. The adjustment mechanism according to claim 4, characterized in that: The connecting sleeve (203a) comprises a limiting groove (203a-1) arranged inside the connecting sleeve; the protruding block (207b) comprises a limiting tooth (207b-1) arranged at an end thereof; and the limiting groove (203a-1) is adapted to the limiting tooth (207b-1).

6. The adjustment mechanism according to claim 4 or 5, characterized in that: The fixing block (208) comprises a slot (208a) arranged inside the fixing block, and a slideway (208b) arranged on one side of the slot (208a); The hinge seat (206) includes a second tension spring (206a) arranged at an end thereof; The end of the second tension spring (206a) is fixed to the inner wall of the slideway (208b); and the hinge seat (206) is adapted to the second rotating shaft (207c).

7. The adjustment mechanism according to claim 6, characterized in that: The fixing block (208) passes through the rotating column (204) and extends to the outside thereof; the extrusion block (205) is matched with the slot (208a); the hinge seat (206) is matched with the slideway (208b); and the hinge seat (206) slides along the inside of the slideway (208b).

8. A hard fence, characterized by: It comprises the adjustment mechanism according to any one of claims 1 to 7; and, a mounting ground (M); a fence body (100), comprising a fence plate (101), and connecting posts (102) arranged on both sides of the fence plate (101); A fixing bolt (400); a pre-buried unit (500), comprising a fixing plate (501), a threaded connection sleeve (502) disposed on the surface of the fixing plate (501), and expansion bolts (503) disposed on both sides of the threaded connection sleeve (502); a pre-connector (600); The threaded connection sleeve (502) and the connection plate (201) are connected and fixed via the fixing bolts (400); and the embedded unit (500) is arranged inside the installation ground (M).

9. The hard fence according to claim 8, characterized in that: The connecting plate (201) comprises a waist hole (201a) arranged on its end surface; The fixing bolt (400) is threadably matched with the threaded connection sleeve (502); the fixing bolt (400) passes through the waist hole (201a) and extends to the outside thereof; the fixing bolt (400) presses the connection plate (201) against the upper surface of the installation ground (M) to fix it.

10. The hard fence according to claim 9, characterized in that: The connecting column (102) is respectively adapted to the fixed connecting tube (202) and the movable connecting tube (203); the connecting unit (200) connects the bottoms of two adjacent groups of fence bodies (100); and the pre-connecting member (600) connects the tops of two adjacent groups of fence bodies (100).

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