WO2013083045A9

WO2013083045A9 - Fence column and fence system

Info

Publication number: WO2013083045A9
Application number: PCT/CN2012/085961
Authority: WO
Inventors: 徐律; 宋国华; 吴海
Original assignee: 张家港固耐特围栏系统有限公司
Priority date: 2011-12-07
Filing date: 2012-12-05
Publication date: 2014-08-21
Also published as: CN102493711A; WO2013083045A1; CN204186144U

Abstract

A fence column and a fence system. The fence column comprises a column body (110) extending along the vertical direction and a fastener (300) connected onto the column body (110). The column body (110) comprises a front wall face (112) connected to a fence sheet body (200), a rear wall face (113) opposite the front wall face (112), and a side wall face connected between the front wall face (112) and the rear wall face (113). The front end portion of the fastener (300) is positioningly connected onto the fence sheet body (200) and onto the front wall face (112) of the column body (110), while the rear end portion penetrates the fence sheet body (200) and the column body (110) and is fasteningly connected onto the rear wall face (113) of the column body (110). A portion of the rear wall face (113) is depressed towards the front wall face (112) to form a groove (115). The rear end portion of the fastener (300) is arranged in the groove (115) and does not exceed the notch of the groove (115). The fence column and the fence system reduce a protrusion on the rear side of the fence column, are difficult to climb, make difficult for tools to be inserted into the groove for vandalization, while also increase the strength of the column body, and reduce fastener costs.

Description

Fence column and fence system

Technical field

The invention relates to a fence column and a fence system for a safety fence, in particular to an anti-climbing fence column and a fence system.

Background technique

The protective fence in the prior art generally includes a plurality of fence posts, a plurality of fence pieces installed between adjacent pairs of fence posts, and the fence pieces are fixed between the pair of fence posts by fasteners or locking structures. The fence column usually consists of a column, a cover plate and a fastener. The column of the fence column plays a main supporting role. Generally, the column body can adopt a structure with a rectangular cross section, a trapezoidal shape, a work shape or a U shape, such as EP1564351B1. The rectangular structure and the U-shaped structure disclosed in FIGS. 1 and 2. At the front of the protective fence, the cover and the dense mesh are tightly combined, the ends of the fasteners are generally smooth and close to the surface of the cover, so that it is not easy to climb; and the rear of the protective fence, the entire body is exposed, for The end of the fixing cover and the fastener of the main body are exposed outside the cylinder. If climbing from the rear side of the protective fence, the protruding end of the fastener can be used as a force point, and the cylinder can be grasped and climbed easily. Prisons and other places need special attention to prevent people from escaping from inside the fence. Therefore, the protective fence should be able to effectively prevent climbing in both directions. In addition, the column with a rectangular cross section is easy to be gripped by the intruder due to the uniform width of the front and rear, so the anti-climbing effect is not good; the column structure with a U-shaped cross section, because the rear wall surface of the cylinder protrudes, Therefore, it is easy for an intruder to completely hold the fence column and apply force to climb, so the anti-climbing effect is not good.

Summary of the invention

It is an object of the present invention to provide an anti-climbing fence post and a fence system using the same.

The technical solution adopted by the invention is:

A fence post for fixedly mounting a fence sheet, the fence column comprising a longitudinally extending cylinder, a fastener attached to the cylinder, the cylinder comprising a fence body a front wall surface of the connection, a rear wall surface opposite to the front wall surface, a side wall surface connected between the front wall surface and the rear wall surface, and a front end portion of the fastener is positioned and connected to the fence piece and the column On the front wall surface of the body, the rear wall surface is partially recessed forward to form a groove, and the rear end portion of the fastener passes through the groove bottom of the groove.

Preferably, the rear end of the fastener is substantially flush with the notch of the groove, or the rear end of the fastener is located within the groove.

Preferably, the groove bottom of the groove is a flat surface.

Preferably, the fastener comprises a bolt and a nut.

Preferably, the nut is located in the groove and abuts against the groove bottom of the groove.

Preferably, the width of the notch of the groove is greater than the width of the groove bottom.

Preferably, the groove has a notch width of less than or equal to 50 mm in cross section of the cylinder.

Preferably, a pair of the side wall surfaces are disposed between the front wall surface and the rear wall surface, and a rear portion of the pair of the side wall surfaces gradually approaches from the front to the rear.

Preferably, the groove extends in the longitudinal direction of the cylinder.

Preferably, two or more grooves are formed on the rear wall surface, and the two or more grooves are laterally arranged side by side.

Preferably, the rear wall surface is provided with one of the grooves, and the groove is located at the center of the rear wall surface.

Preferably, the rear wall surface is provided with a plurality of the grooves, and the plurality of grooves are arranged on the column in the longitudinal direction.

Preferably, a plurality of said grooves are arranged in two or more rows laterally side by side on said rear wall surface.

Preferably, the fence column has a wall thickness of 0.5-5 mm.

Preferably, the column body is provided with an opening, and the front wall surface is divided by the opening into two side portions respectively connected to a pair of the side wall surfaces.

Preferably, the fence post further includes a cover plate fixedly coupled to a front wall surface of the cylinder and extending in a longitudinal direction, a rear end portion of the fastener passing through the cover plate and the The fence sheet is then fixedly attached to the rear wall of the cylinder.

Preferably, the cylinder is a hollow cylinder, and the cylinder is formed by a bending process.

A fence system comprising a plurality of fence posts and a fence sheet, the fence sheets being connected to the fence posts on both sides, the fence columns comprising columns extending in a longitudinal direction, connected to the fence a fastener on the cylinder, the pillar body comprising a front wall surface connected to the fence sheet body, a rear wall surface opposite to the front wall surface, and a side wall surface connected between the front wall surface and the rear wall surface, The front end portion of the fastener is positioned and connected to the front wall surface of the fence piece and the column body, wherein the rear wall surface is partially recessed forward to form a groove, and the fastener is The rear end portion passes through the groove bottom of the groove.

Preferably, the fastener passes through the fence piece and is positioned and connected to the rear wall surface of the cylinder.

Preferably, the groove bottom of the groove is a flat surface.

Preferably, the fastener comprises a bolt and a nut.

Preferably, the groove extends in the longitudinal direction of the cylinder.

Preferably, the fence column has a wall thickness of 0.5-5 mm.

Preferably, the fence post further includes a cover plate fixedly coupled to a front wall surface of the cylinder and extending in a longitudinal direction, a rear end portion of the fastener passing through the cover plate and the The fence piece is fixedly attached to the rear wall surface of the cylinder.

Preferably, the fence post further includes a cover plate fixedly connected to the front wall surface of the cylinder and extending in a longitudinal direction, and a rear end portion of the fastener passes through the cover plate and is fixedly connected On the rear wall surface of the cylinder, the fence piece is clamped and fixed between the cover plate and the cylinder.

Preferably, a plurality of first positioning members are longitudinally distributed on the front wall surface of the cylinder, and the cover plate is longitudinally distributed with a plurality of second portions respectively matched with the plurality of the first positioning members. The positioning member, one of the first positioning member and the second positioning member is positioned and connected to the other positioning member through the fence piece.

The advantages of the invention are:

1. The invention has a groove formed on the rear wall surface of the cylinder body, so that the ends of the fastener are all received in the groove, thereby reducing the protrusion on the back side of the fence column and reducing the climbing force point, so it is not easy to climb. climb;

2. The end of the fastener of the present invention is received in the groove, and the tool does not easily protrude into the groove for destruction, so the anti-destruction effect is better;

3, the groove structure can be increased, the strength of the column can be increased, and the length of the fastener connection can be shortened, so that shorter fasteners can be used for fixing, saving cost;

4. In addition, the rear portions of the pair of side wall surfaces of the present invention gradually close together. When the climber holds the cylinder, the contact area between the hand and the cylinder is small, the friction is small, and the hand is not easy to apply force, especially the column. The rear portion of the body is formed with a groove, which further reduces the contact area between the rear wall surface of the column and the hand, so that the column body is not easy to climb.

DRAWINGS

Figure 1 is a perspective exploded view of the fence column of the present invention;

Figure 2 is a cross-sectional view of the present invention;

Figure 3 is a cross-sectional view of the cylinder of the present invention;

Figure 4 is a perspective view 1 of the end cap of the present invention;

Figure 5 is a perspective view 2 of the end cap of the present invention;

Figure 6 is a perspective view of the cover of the present invention;

Figure 7 is a front elevational view of the cover of the present invention;

Figure 8 is a cross-sectional view of the cover of the present invention;

Figure 9 is a schematic view of the present invention when applied to a fence system;

Figure 10 is a cross-sectional view taken along line A-A of Figure 2;

Figure 11 is a longitudinal sectional view of a cylinder in another embodiment of the present invention;

12, 13, and 14 are cross-sectional views of a cylinder in still another embodiment of the present invention;

Of which: 100, fence column;

110, cylinder; 111, first positioning member; 112, front wall surface; 113, rear wall surface; 114, side wall surface; 115, groove; 116, side portion;

120, a cover plate; 121, a second positioning member; 122, a mounting hole; 123, a second notch; 124, a bent portion;

130, end cover; 131, shielding portion; 132, third positioning member; 133, first notch; 134, locking portion; 135, base surface; 136, protective sheet;

200, fence sheet;

300, fasteners; 301, bolts; 302, nuts.

detailed description

The invention will be described in detail below with reference to the accompanying drawings, wherein the "front" side in the specification refers to the upper part in FIG. 2, and the "rear" side in the specification refers to the lower part in FIG. 2, which is described in the specification. The "longitudinal direction" refers to the up and down direction in Fig. 1, and the "horizontal" direction in the specification refers to the left and right direction in Fig. 2, and the lateral direction is perpendicular to the longitudinal direction.

Referring to Figures 1 and 9, the present invention discloses a fence column and fence system having a plurality of fence units, each fence unit including two fence columns 100, between the two fence columns 100. And the fence sheet 200 for the enclosure extending in both the longitudinal direction and the lateral direction, the fence column is usually made of a metal material (such as a steel plate), and after the foundation construction, the lower end portion of the fence column 100 is placed in the foundation reserve. Fixed in the hole position.

The fence post 100 includes a longitudinally extending cylinder 110, a cover plate 120 fixedly coupled to the front wall surface 112 of the cylinder 110 and extending longitudinally, and a fixed connection to the upper end of the cylinder 110. The end cover 130 and the plurality of fasteners 300 are used for fixedly connecting the cover plate 120, the fence piece 200 and the end cover 130 to the cylinder 110.

Referring to Figures 2 and 3, the column 110 includes a front wall surface 112 connected to the cover plate 120, a rear wall surface 113 opposite the front wall surface 112, and a front wall surface 112 and a rear portion. The side wall surface 114 between the wall surfaces 113, the rear wall surface 113 may be a flat or curved surface or an irregular surface, the fastener 300 passes through the cylinder 110, and the front end portion is positioned and connected to the cover plate 120. Upper end portion is fastened to the rear wall surface 113. In general, the fence system is usually installed around the building or the enclosure as shown in Figures 2 and 9. The front portion of the column 110 is outward and the rear is inward. The fence system we usually see can usually be The intruder is prevented from entering the enclosure from the outside to the outside, and the less fence system considers that there may be a climber in the enclosure to climb over the fence from the inside of the yard, and the more common application places such as prisons.

In order to prevent the fence system from being turned over from the enclosure site, the method of the present invention is such that the rear wall surface 113 has a portion on the side where the front wall surface is recessed to form a groove 115, and the remaining portion of the rear wall surface 113 forms the pillar 110. a rear end surface, the rear end portion of the fastener 300 is substantially flush with the groove of the groove 115, or the rear end portion of the fastener 300 is located in the groove 115, that is, The rear end portion of the fastener 300 does not exceed or slightly exceed the notch of the groove 115, so that the rear end surface of the fence post 100 is flat and has no protrusions, and it is difficult for the climber to find the climbing point, thereby Plays a role of anti-climbing; of course, the rear end of the fastener 300 does not exceed or slightly exceed the notch of the groove 115 is a most preferred way to ensure that the climber cannot focus on the fastener In the case of the end, the rear section of the fastener 300 allows a portion to extend out of the notch of the groove 115.

Referring to Figures 2, 9, and 11, the fastener 300 includes a bolt 301 and a nut 302. The bolt 301 passes through the cover 120 and the cylinder 110 in sequence, and is then tightened by a nut 302 located in the recess 115, and the nut 302 is abutted. The bottom of the groove of the groove 115 ensures the stable compression between the cover 120 and the column 110, thereby ensuring that the fence piece 200 is pressed and fixed, so as to ensure the rigidity of the nut 302 at the groove bottom of the groove 115. Force, designed to make the bottom of the groove flat.

Further, in order to achieve a better anti-climbing effect, it is difficult for the hand of the climber to grasp the cylinder 110, and the cross section of the cylinder 110 is preferably formed in the circumferential direction. A closed week, so that the climber's hand can't reach into the fence or the column, so it is not easy to apply force and climb. Alternatively, the front wall surface 112 of the cylinder 110 opposite to the cover 120 may also have an opening, and the cover 120 and the fence body 200 block the opening, and the remaining sides of the cylinder 110 form a circumferentially continuous outer peripheral surface. Preferably, a pair of the side wall surfaces 114 are disposed between the front wall surface 112 and the rear wall surface 113, and the rear portions of the pair of the side wall surfaces 114 are gradually approached from the front to the rear, so that when held by the hand When the cylinder 110 is biased, since the rear portions of the pair of the side wall surfaces 114 are gradually close together, the contact area between the cylinder 110 and the hand is small, and it is difficult to grasp and apply force to prevent climbing. effect.

Preferably, the width of the notch of the groove 115 is greater than the width of the groove bottom. Since the cylinder 110 is usually formed by bending a steel plate, the sides of the groove 115 are inclined to increase the strength of the cylinder 110.

In the cross section of the cylinder 110, the groove 115 has a notch width of 50 mm or less, which prevents the foot from protruding into the groove 115.

The groove 115 extends in the longitudinal direction of the cylinder 110, and the longitudinal direction here further includes a direction inclined to the longitudinal direction of the cylinder 110. One or more grooves 115 may be defined in the rear wall surface 113. When two or more grooves 115 are opened on the rear wall surface 113, the two or more grooves 115 are Horizontally side by side, as shown in Figures 12 and 13. When the rear wall surface 113 is provided with one of the grooves 115, the groove 115 is located at the center of the rear wall surface 113. When a plurality of the grooves 115 are defined in the rear wall surface 113, a plurality of the plurality of grooves 115 are arranged on the column 110 in the longitudinal direction. As shown in Figure 11. When a plurality of the grooves 115 are formed in the rear wall surface 113, a plurality of the grooves 115 may be divided into two or more rows and arranged side by side on the rear wall surface 113.

Preferably, the fence column 100 is made of a steel plate and has a wall thickness of 0.5-5 mm.

As shown in FIG. 1 and FIG. 2, in the embodiment, the column 110 is provided with an opening, and the front wall surface 112 is divided by the opening into two pieces respectively connected to the pair of the side wall surfaces 114. The side portion 116 defines a plurality of first positioning members 111 that cooperate with the cover plate 120. The first positioning member 111 is a socket.

The cover plate 120 includes a longitudinally extending body, and the body has a portion protruding toward one side to form a longitudinally extending bent portion 124, and the body further has a plurality of protrusions protruding from the body. The second positioning member 121, the curved portion 124 and the second positioning member 121 are integrally formed on the body, and the strength of the cover 120 can be increased by the curved portion 124. The curved portion 124 is formed by bending or punching. The second positioning member 121 is formed by bending after being bent, or is formed by bending after punching.

As shown in Figures 6 and 7, the second positioning member 121 is a protrusion. Preferably, the protrusion has a barb structure. As shown in FIG. 10, the second positioning member 121 of the barb structure is inserted into the first positioning member 111, because the outer diameter of the barb root is larger than the first positioning member 111. The caliber so that when it is caught in the first positioning member 111, it can hook the front wall surface 112 of the cylinder 110 on the inside and is not easily loosened. Through the second positioning member of the barb structure, the self-joining between the cover 120 and the cylinder 110 can be realized, that is, without connecting by fasteners. However, more often, it is necessary to connect by fasteners. As shown in FIG. 2, the fastener 300 passes through the curved portion 124 of the cover plate 120 and ends with the column. The body 110 is connected. In this embodiment, the curved portion 124 is convex forward. Therefore, after being fastened by the fastener 300, the two side edges of the cover 120 are directly pressed against the cylinder 110, so the cover 120 The side edge locking force is very large, preventing foreign matter from being inserted between the cover and the cylinder for damage.

Referring to FIG. 4 and FIG. 5, the end cover 130 includes a base surface 135, a shielding portion 131 bent from the base surface 135 toward one side, and the shielding portion from the base surface 135 to the shielding portion. The locking portion 134 is bent in the direction of the same side. The shielding portion 131 and the locking portion 134 are integrally formed on the base surface 135 by bending and punching. A first notch 133 is defined in the edge of the shielding portion 131, and a second notch 123 is defined in the cover plate 120. When the end cover 130 is fixed on the column 110, the shielding portion 131 is The edge is opposite the end of the cover plate 120, and the first notch 133 and the second notch 123 are joined together to form a positioning hole through which the fastener 300 can pass, and the fastener 300 is worn. After the positioning hole and the locking portion 134 are described, the end is locked and fixed on the rear wall surface of the cylinder 110. Since the edge of the shielding portion 131 just abuts against the end portion of the cover 120 to form a flat surface, it is not easily warped or broken.

The two sides of the shielding portion 131 are bent toward the locking portion 134 to form a protective piece 136. The protective piece 136 has a third positioning member 132 coupled to the first positioning member 111. The third positioning member 132 is a positioning protrusion that can be inserted into the first positioning member 111. The position of the end cap 130 in the longitudinal direction can be fixed by the third positioning member 132, preventing the end cap from slipping when installed or subjected to a destructive force. The base surface 135 of the end cover 130 encloses the upper end portion of the cylinder 110, and the locking portion 134 is inserted into the hollow end of the cylinder 110, and the locking portion 134 and the groove are The bottom of the groove of 115 is opposite. Therefore, the end cover 130 is fixed very safely, and the fixing point is hidden inside the cylinder and is not easily broken.

Referring to Figures 12, 13 and 14, a cross-sectional view of the fence post in the other three embodiments of the fence post of the present invention, as shown in Figures 12 and 13, the rear wall 113 of the cylinder 110 of the fence post 100 There are two grooves 115, and the fasteners 300 are respectively disposed through the corresponding grooves 115. In order to ensure the reliable force of the fasteners 300 in the grooves 115, the groove bottoms of the respective grooves 115 are flat with nuts. The end surface of the 302 is stably abutted, and the corresponding rear wall surface 113 is provided with a plurality of grooves 115. In order to strengthen the strength of the entire column 110, the groove 115 may also be disposed on the side wall surfaces 114 on both sides, in particular, 12 and 13, in order to better position and connect the fence sheet 200, the fence sheets 200 can be brought closer to each other so that the fasteners 300 on both sides can pass through the corresponding fence sheets 200, that is, The bolts 301 are sequentially fastened through the cover 120, the fence body 200 and the column 110, and then fastened by the twisting nut 302; in some embodiments, the two adjacent fence pieces 200 may be partially overlapped and fixed. , that is, the bolt 301 sequentially passes through the overlapping portions of the two fence sheets and is fixed. On the cylinder. Further, the corresponding side edges 116 can be appropriately extended toward each other, even if the bolt 301 passes through the cover 120, the fence piece 200, the corresponding side portion 116 and the column 110 in turn, and then through the twist nut 302. Fasten. In the preferred embodiment, the fence piece 200 is clamped between the cover 120 and the cylinder 110 by the first positioning member 111 and the second positioning member 121, so that the fastener 300 only needs to pass through the cover plate. The 120 and the cylinder 110, without the need to pass through the fence sheet 200, can also achieve a good fixing effect.

The invention also discloses a fence system using the fence column in any one of the above embodiments, which comprises a plurality of fence posts 100 and a plurality of fence sheets 200, and two sides of the fence sheet 200 are correspondingly connected and mounted on the adjacent fence posts 100. (As illustrated in Fig. 9), the number of fence posts 100 and fence sheets 200 is selected by the user as needed.

Claims

1. A fence post for fixedly mounting a fence sheet, the fence column comprising a longitudinally extending cylinder, a fastener attached to the cylinder, the cylinder comprising a fence body a front wall surface of the connection, a rear wall surface opposite to the front wall surface, a side wall surface connected between the front wall surface and the rear wall surface, and a front end portion of the fastener is positioned and connected to the fence piece and the column The front wall surface of the body is characterized in that: the rear wall surface is partially recessed toward the front to form a groove, and the rear end portion of the fastener passes through the groove bottom of the groove.

2. A fence post according to claim 1 wherein said rear end portion of said fastener is substantially flush with the notch of said groove or the rear end of said fastener Located within the groove as described.

3. A fence post according to claim 1, wherein the groove bottom of the groove is a flat surface.

4. A fence post according to claim 1 wherein said fastener comprises a bolt and a nut.

5. A fence post according to claim 4, wherein said nut is located in said recess and abuts against the bottom of said groove.

6. A fence post according to claim 1 wherein the width of the notch of the groove is greater than the width of the groove bottom.

7. A fence post according to claim 1, wherein said groove has a notch width of less than or equal to 50 mm in cross section of said cylinder.

8. A fence post according to claim 1, wherein a pair of said side wall faces are disposed between said front wall surface and said rear wall surface, and a rear portion of said pair of said side wall faces gradually extends from front to back near.

9. A fence post according to claim 1 wherein said recess extends longitudinally of said cylinder.

10. A fence post according to claim 9, wherein said rear wall surface is provided with two or more said grooves, and said two or more grooves are laterally arranged side by side.

11. A fence post according to claim 9, wherein said rear wall surface is provided with said one groove, and said groove is located at the center of said rear wall surface.

12. A fence post according to claim 1, wherein said rear wall surface is provided with a plurality of said grooves, and said plurality of said grooves are arranged longitudinally on said cylinder .

13. A fence post according to claim 12, wherein a plurality of said grooves are arranged in two or more rows laterally side by side on said rear wall surface.

14. A fence post according to claim 1 wherein said fence post has a wall thickness of between 0.5 and 5 mm.

15. A fence post according to claim 1, wherein said cylinder is provided with an opening, said front wall surface being divided by said opening into two sides respectively connected to a pair of said side wall faces Edge.

16. A fence post according to claim 1, wherein said fence post further comprises a cover plate fixedly coupled to a front wall surface of said cylinder and extending in a longitudinal direction, said fastener The rear end portion is fixedly coupled to the rear wall surface of the cylinder after passing through the cover plate and the fence sheet.

17. A fence post according to claim 1 wherein said cylinder is a hollow cylinder.

18. A fence post according to any one of claims 1 to 17, wherein the cylinder is formed by a bending process.

19. A fence system comprising a plurality of fence posts and a fence sheet, the fence sheets being connected to the fence posts on both sides, the fence columns comprising columns extending in a longitudinal direction, connected to the fence a fastener on the cylinder, the pillar body comprising a front wall surface connected to the fence sheet body, a rear wall surface opposite to the front wall surface, and a side wall surface connected between the front wall surface and the rear wall surface, The front end portion of the fastener is positioned and connected to the front wall surface of the fence piece and the column body, wherein the rear wall surface is partially recessed forward to form a groove, and the fastener is The rear end portion passes through the groove bottom of the groove.

20. A fence system according to claim 19, wherein said fastener passes through said fence body and is positioned and attached to a rear wall surface of said cylinder.

21. A fence system according to claim 19, wherein the rear end of the fastener is substantially flush with the notch of the groove or the rear of the fastener The ends are located within the grooves.

22. A fence system according to claim 19, wherein the groove bottom of the groove is planar.

23. A fence system according to claim 19 wherein said fasteners comprise bolts and nuts.

twenty four. A fence system according to claim 23, wherein said nut is located in said recess and abuts against the bottom of said groove.

25. A fence system according to claim 19, wherein the width of the notch of the groove is greater than the width of the groove bottom.

26. A fence system according to claim 19, wherein said groove has a notch width of less than or equal to 50 mm in cross section of said cylinder.

27. A fence system according to claim 19, wherein a pair of said side wall faces are disposed between said front wall surface and said rear wall surface, and a rear portion of said pair of said side wall faces gradually changes from front to back near.

28. A fence system according to claim 19 wherein said recess extends longitudinally of said cylinder.

29. A fence system according to claim 28, wherein said rear wall surface is provided with two or more said grooves, and said two or more grooves are laterally arranged side by side.

30. A fence system according to claim 28, wherein said rear wall surface is provided with said one groove, and said groove is located at the center of said rear wall surface.

31. A fence system according to claim 19, wherein said rear wall surface is provided with a plurality of said grooves, and said plurality of said grooves are arranged longitudinally on said cylinder .

32. A fence system according to claim 31, wherein a plurality of said grooves are arranged in two or more rows laterally side by side on said rear wall surface.

33. A fence system according to claim 19, wherein said fence column has a wall thickness of from 0.5 to 5 mm.

34 A fence system according to claim 19, wherein said cylinder is provided with an opening, said front wall surface being divided by said opening into two sides respectively connected to a pair of said side wall faces Edge.

35 A fence system according to claim 19, wherein said fence post further comprises a cover plate fixedly coupled to said front wall surface of said cylinder and extending longitudinally, said fastener The rear end portion is fixedly connected to the rear wall surface of the cylinder through the cover plate and the fence piece.

36 A fence system according to claim 19, wherein said fence post further comprises a cover plate fixedly coupled to said front wall surface of said cylinder and extending longitudinally, said fastener The rear end portion is fixedly connected to the rear wall surface of the cylinder through the cover plate, and the fence piece is clamped and fixed between the cover plate and the cylinder.

37. A fence system according to claim 36, wherein a plurality of first positioning members are longitudinally distributed on the front wall surface of the column, and the cover plates are longitudinally distributed with a plurality of respectively a plurality of the first positioning members are matched with the second positioning member, and one of the first positioning member and the second positioning member is positioned and connected to the other positioning member through the fence piece.

38. A fence system according to claim 19, wherein said cylinder is a hollow cylinder.

39. A fence system according to any one of claims 19 to 38, wherein the cylinder is formed by a bending process.