阅读说明：本技术 一种临时交通护栏 (Interim traffic guardrail ) 是由 丁晓伟 陈锦华 黄旭芳 董建生 丰志和 胡理勇 丰根彩 胡建军 陈绍芬 徐建伦 于 2019-08-30 设计创作，主要内容包括：本发明公开了一种临时交通护栏,包括方形框架、设置于方形框架下方的支撑脚和设置在方形框架之中的竖向布置的若干栏杆,若干栏杆上设置有若干子板,若干子板排列于若干栏杆之上形成连续的折线形,折线形排列的子板之间的夹角为60-90度,子板与子板之间留出供风流通的排风通道,子板与栏杆连接位置的侧边由上至下设置供风流通的排风孔道。该临时交通护栏可以在若干子板上贴上或者画上所需的警示文字、标识、广告,多片子板可以拼合成更大更完整的立体面,保证警示、宣传的效果；依靠排风道,风在顺着板面导向夹角时,可以从夹角处的排风道流向后方,降低了子板所承受的风力,令临时交通护栏不容易被吹倒,提高了稳定性和安全性。(The invention discloses a temporary traffic guardrail, which comprises a square frame, supporting legs arranged below the square frame and a plurality of railings arranged in the square frame and vertically arranged, wherein a plurality of sub-boards are arranged on the plurality of railings and are arranged on the plurality of railings to form a continuous fold line shape, the included angle between the sub-boards arranged in the fold line shape is 60-90 degrees, an air exhaust channel for air circulation is reserved between the sub-boards, and an air exhaust channel for air circulation is arranged on the side edge of the connecting position of the sub-boards and the railings from top to bottom. The temporary traffic guardrail can be used for pasting or drawing required warning characters, marks and advertisements on a plurality of sub-boards, and a plurality of sub-boards can be spliced into a larger and more complete three-dimensional surface, so that the warning and propaganda effects are ensured; by means of the air exhaust duct, when wind is guided to the included angle along the board surface, the wind can flow to the rear part from the air exhaust duct at the included angle, the wind force borne by the daughter board is reduced, the temporary traffic guardrail is not easy to blow down, and the stability and the safety are improved.)

1. The utility model provides an interim traffic guardrail, includes square frame (1), sets up in supporting legs (2) of square frame (1) below and sets up a plurality of railing (3) of vertical arrangement among square frame (1), its characterized in that: a plurality of be provided with on railing (3) a plurality of daughter boards (4), a plurality of daughter boards (4) are arranged and are formed continuous dogleg shape on a plurality of railing (3), and the contained angle between daughter board (4) that the dogleg shape was arranged is 60-90 degrees, reserves air supply circulation's air exhaust passageway (5) between daughter board (4) and daughter board (4), and daughter board (4) and railing (3) hookup location's side sets up air supply circulation's air exhaust pore (6) from top to bottom.

2. A temporary traffic barrier according to claim 1, wherein: the auxiliary board (4) is of a single-piece structure, one side edge of each of the two auxiliary boards (4) is fixedly arranged on one rail (3), the position of the side edge adjacent to the rail (3) is provided with an air exhaust duct (6) from top to bottom, and the other side edge opposite to the side edge forms a gap with the auxiliary board (4) on the adjacent rail (3), namely an air exhaust channel (5).

3. A temporary traffic barrier according to claim 1, wherein: the daughter board (4) is the structure that the cross-section is V-arrangement, and the middle part of daughter board (4) is installed fixedly on railing (3), and this middle part sets up air exhaust pore (6) from top to bottom with the position that railing (3) are adjacent, and daughter board (4) on the both sides of daughter board (4) and adjacent railing (3) form the clearance, air exhaust passageway (5) promptly.

4. A temporary traffic barrier according to claim 1, 2 or 3, wherein: the sub-board (4) is arranged on the railing (3) through a fastener (7).

5. A temporary traffic barrier according to claim 4, wherein: the fastener (7) comprises an outer cylinder (71) and an inner clamping piece (72), the outer cylinder (71) is fixedly mounted on the railing (3), the outer cylinder (71) is provided with an inner cavity (711), the inner cavity (711) is provided with a first hole section (7111), a second hole section (7112) and a third hole section (7113) from the upper end of the outer cylinder (71) to the lower part, the diameter of the second hole section (7112) is smaller than that of the first hole section (7111) and the third hole section (7113), and the first hole section (7111) is provided with a first internal thread; the inner clamping piece (72) comprises a spiral part (721) and a pushing part (722), the spiral part (721) is provided with a through hole (7211) through which the pushing part (722) penetrates and axially slides, the pushing part (722) and the spiral part (721) are circumferentially positioned through a key groove structure, the periphery of the upper end of the spiral part (721) is provided with a ring of flange (7212), the whole periphery of the spiral part (721) is provided with a first external thread matched with the first internal thread, and the peripheral wall of the pushing part (722) is provided with a telescopic clamping piece (7221); when the inner clamping piece (72) and the outer cylinder (71) are installed in a matching mode, the spiral part (721) is rotated by holding the pushing part (722), so that the spiral part (721) is screwed into the first hole section (7111) in place, and the sub-plate (4) is clamped by the opposite surfaces of the flange (7212) and the outer cylinder (71); and then the pushing part (722) is pushed to the end part of the spiral part (721) which is submerged, and meanwhile, the clamping piece (7221) reaches the third hole section (7113) and is clamped at the step parts of the third hole section (7113) and the second hole section (7112), so that the locking of the inner clamping piece (72) and the outer cylinder (71) is completed.

6. A temporary traffic barrier according to claim 5, wherein: the inner clamping piece (72) further comprises a clamping ring (723), and when the spiral part (721) and the pushing part (722) are in the initial positions, the clamping ring (723) is detachably clamped on the pushing part (722) to prevent the pushing part (721) from being pushed.

7. A temporary traffic barrier according to claim 5, wherein: the upper end side of propelling part (722) is provided with to a position piece (7222), the upper end of spiral portion (721) is provided with to a position piece (7222) looks adaptation slot (7213) that targets in place, when propelling part (722) target in place, to a position piece (7222) and sink in to a position slot (7213) and contradict the tank bottom.

8. A temporary traffic barrier according to claim 5, wherein: the fastener (7) further comprises a dismounting piece (73), the inner cavity (711) further comprises a fourth hole section (7114), the fourth hole section (7114) is positioned below the third hole section (7113) and penetrates through the outer barrel (71) downwards, the diameter of the fourth hole section (7114) is larger than that of the third hole section (7113), and a second internal thread is arranged on the fourth hole section (7114); size looks adaptation of stripper (73) and fourth hole section (7114) and set up the second external thread with second internal thread looks adaptation in the periphery, stripper (73) are installed and are gone into fourth hole section (7114) when arriving to fourth hole section (7114), the tip setting of stripper (73) is used for inserting the instrument and carries out special-shaped groove (74) that stripper (73) are rotatory, joint (7221) have the first inclined plane (72211) that slides and retract when supplying the instrument to contradict towards the direction of fourth hole section (7114).

9. A temporary traffic barrier according to claim 8, wherein: the lower end of the pushing part (722) is further provided with an inserting section (7223) extending to a fourth hole section (7114), the peripheral wall of the inserting section (7223) is provided with a telescopic limiting piece (7224), the other end, opposite to the special-shaped groove (74), of the dismounting piece (73) is provided with an inserting groove (75) for the inserting section (7223) to be inserted into, the groove bottom of the inserting groove (75) is provided with a limiting empty groove (76) with a diameter larger than that of the inserting groove (75), and when the inserting section (7223) is inserted into the limiting empty groove (76) along the inserting groove (75) to a certain position, the limiting piece (7224) reaches the limiting empty groove (76) and is clamped at steps of the limiting empty groove (76) and the inserting groove (75); the limit empty groove (76) is communicated to the special-shaped groove (74), and the limit piece (7224) is provided with a second inclined surface (72241) for sliding and retracting when a tool collides towards the special-shaped groove (74).

10. A temporary traffic barrier according to claim 9, wherein: the clamping pieces (7221) and the limiting pieces (7224) are uniformly arranged in two groups or three groups on the circumference.

Technical Field

The invention relates to the field of guardrails, in particular to a temporary traffic guardrail.

Background

The traffic guardrail plays an important role in urban traffic, and can separate lanes, or block roads to warn people or vehicles; the traffic order can be well normalized.

The temporary traffic guardrail is of a single-piece structure, is transported when needed and is arranged on a road for traffic obstruction; the temporary traffic guardrail with the single-chip structure is provided with a planar plate-shaped board structure on the surface of the guardrail, and is used for arranging warning characters, marks or advertisements and the like; however, because the temporary traffic guardrail single piece is not provided with peripheral structures for auxiliary fixation, and the plane plate-shaped plate is arranged to bear larger wind power when being blown by wind, the whole temporary traffic guardrail is easy to be blown over when the wind is strong, so that the normal use is influenced, and pedestrians can be injured by smashing; therefore, how to well resist wind and ensure the stable use of the temporary traffic guardrail with the plate-shaped cards is a problem which needs to be solved urgently.

Disclosure of Invention

The invention aims to provide a temporary traffic guardrail which can better bear strong wind through a mechanism of a composition board, has high stability, can set warning characters, marks, advertisements and the like by the composition board, and ensures the functionality of the temporary traffic guardrail.

The invention provides the following technical scheme: the utility model provides an interim traffic guardrail, includes square frame, set up in the supporting legs of square frame below and set up a plurality of railings of vertical arrangement among square frame, be provided with a plurality of daughter boards on a plurality of railings, a plurality of daughter boards are arranged and are formed continuous dogleg shape on a plurality of railings, the contained angle between the daughter board of dogleg shape range is 60-90 degrees, the passageway of airing exhaust of air feed circulation is left between daughter board and the daughter board, the side of daughter board and railing hookup location sets up the pore of airing exhaust of air feed circulation from top to bottom.

As an improvement, the sub-boards are of a single-piece structure, one side edge of each of the two sub-boards is arranged on a railing and fixed, the position of the side edge adjacent to the railing is provided with an air exhaust duct from top to bottom, and the other side edge opposite to the side edge forms a gap with the sub-boards on the adjacent railing, namely an air exhaust channel.

As an improvement, the daughter board is of a V-shaped structure, the middle of the daughter board is fixedly arranged on a railing, the middle of the daughter board is provided with an air exhaust duct from top to bottom adjacent to the railing, and gaps are formed between the two sides of the daughter board and the daughter board on the adjacent railing, namely an air exhaust channel.

As an improvement, the daughter board is mounted to the rail by fasteners.

As an improvement, the fastener comprises an outer barrel and an inner clamping piece, the outer barrel is fixedly arranged on the railing and is provided with an inner cavity, a first hole section, a second hole section and a third hole section are arranged in the inner cavity from the upper end of the outer barrel to the lower part, the diameter of the second hole section is smaller than that of the first hole section and that of the third hole section, and a first internal thread is arranged on the first hole section; the inner clamping piece comprises a spiral part and a pushing part, the spiral part is provided with a through hole for the pushing part to penetrate through and axially slide, the pushing part and the spiral part are circumferentially positioned through a key groove structure, a circle of flange is arranged on the periphery of the upper end of the spiral part, a first external thread matched with the first internal thread is arranged on the periphery of the whole spiral part, and a telescopic clamping piece is arranged on the peripheral wall of the pushing part; when the inner clamping piece and the outer cylinder are installed in a matched mode, the spiral part is rotated through the holding pushing part, so that the spiral part is screwed into the first hole section in place, and the daughter board is clamped by the opposite surfaces of the flanges and the outer cylinder; then, the pushing part is pushed to the end part of the spiral part, and meanwhile, the clamping piece reaches the third hole section and is clamped at the step parts of the third hole section and the second hole section, so that the inner clamping piece and the outer barrel are locked.

As an improvement, the inner clamping piece also comprises a clamping ring, and when the spiral part and the pushing part are in the initial positions, the clamping ring is detachably clamped on the pushing part to prevent the pushing part from pushing on the spiral part.

A temporary traffic barrier according to claim, wherein: the side of the upper end of the pushing portion is provided with a positioning block, the upper end of the spiral portion is provided with a positioning groove matched with the positioning block, and when the pushing portion is pushed to be positioned, the positioning block is immersed in the positioning groove and is abutted against the bottom of the groove.

As an improvement, the fastener further comprises a dismounting part, the inner cavity further comprises a fourth hole section, the fourth hole section is positioned below the third hole section and downwards penetrates through the outer barrel, the diameter of the fourth hole section is larger than that of the third hole section, and a second internal thread is arranged on the fourth hole section; the size looks adaptation of disassembling piece and fourth hole section and set up the second external thread with second internal thread looks adaptation in the periphery, and the disassembling piece is installed and is gone into the fourth hole section when target in place to the fourth hole section, and the tip setting of disassembling piece is used for inserting the special-shaped groove that the instrument carries out disassembling piece rotation, and the direction that joint spare orientation fourth hole section has the first inclined plane that carries out the retraction that slides when supplying the instrument to contradict.

As an improvement, the lower end of the pushing part is also provided with an insertion section extending to the fourth hole section, the peripheral wall of the insertion section is provided with a telescopic limiting piece, the other end of the dismounting part, which is opposite to the special-shaped groove, is provided with an insertion groove for the insertion section to insert, the bottom of the insertion groove is provided with a limiting empty groove with a diameter larger than that of the insertion groove, and when the insertion section is inserted into the limiting empty groove along the insertion groove in place, the limiting piece reaches the limiting empty groove and is clamped at the step of the limiting empty groove and the insertion groove; the limiting empty groove is communicated to the special-shaped groove, and the direction of the limiting part facing the special-shaped groove is provided with a second inclined surface for sliding and retracting when the tool is abutted.

As an improvement, the clamping pieces and the limiting pieces are evenly distributed in two groups or three groups on the circumference.

The invention has the beneficial effects that: through the arrangement of the plurality of broken line-shaped sub-boards, the temporary traffic guardrail can be used for pasting or drawing required warning characters, marks or advertisements on the plurality of sub-boards, and a plurality of sub-boards can be spliced into a larger and more complete solid surface to display the content on the sub-boards to the outside, so that the use function of the original whole flat plate can be realized, and the warning and propaganda effects can be ensured; on the other hand relies on the exhaust airway of rational arrangement, wind when the contained angle is leading along the face, can follow the exhaust airway flow direction rear that the contained angle was arranged to the contained angle department to the wind-force that the daughter board bore has been reduced, the zigzag form of daughter board arranges and adopts the contained angle of 60-90 degrees, it is better to the guiding nature of wind, the daughter board is littleer bears the stress of wind, thereby make interim traffic guardrail be difficult to blow down, perhaps can bear bigger wind, the stability of the interim traffic guardrail of band plate has been improved, it is safer to use.

Drawings

Fig. 1 is a schematic perspective view of a temporary traffic guardrail of the present invention.

FIG. 2 is a schematic cross-sectional view of a first embodiment of a balustrade and daughterboard arrangement of the present invention;

FIG. 3 is a schematic cross-sectional view of a second embodiment of a balustrade and daughterboard arrangement of the present invention;

FIG. 4 is a schematic view of an exploded construction of the fastener of the present invention;

FIG. 5 is a schematic view of the assembled construction of the fastener of the present invention;

FIG. 6 is a schematic view of the assembled end face of the fastener of the present invention;

fig. 7 is a schematic view of another end face of the fastener of the present invention shown in an assembled configuration.

Detailed Description

The following detailed description of specific embodiments of the invention refers to the accompanying drawings.

Referring to fig. 1-7, one embodiment of the temporary traffic barrier of the present invention is shown. This embodiment includes square frame 1, set up in supporting legs 2 of square frame 1 below and set up a plurality of railings 3 of the vertical arrangement among square frame 1, be provided with a plurality of daughter boards 4 on a plurality of railings 3, a plurality of daughter boards 4 are arranged and are formed continuous broken line shape on a plurality of railings 3, the contained angle between the daughter board 4 of broken line shape range is 60-90 degrees, leave the passageway 5 of airing exhaust that the confession circulates between daughter board 4 and the daughter board 4, daughter board 4 sets up the pore 6 of airing exhaust that the confession circulates from top to bottom with the side of railing 3 hookup location.

When the invention is used, as shown in fig. 1, the square frame 1, the supporting feet 2 and the plurality of railings 3 can adopt a conventional structure, the square frame 1 and the plurality of railings 3 which are vertically arranged form a conventional fence shape, the supporting feet 2 can be symmetrically arranged on two sides of the lower part of the square frame 1 and are arranged into the supporting feet 2 which are vertical to the square frame 1 and have a left-right triangle structure, so that the structural firmness and the stability of the bottom are improved.

As shown in fig. 2 and 3, two embodiments are provided for the daughter board 4. In the first embodiment, the daughter boards 4 are single-piece cuboid structures, one side edges of the two daughter boards 4 are fixedly mounted on one rail 3 to form an included angle of 60-90 degrees, for example, the included angle of 90 degrees is shown in the embodiment of the figure, the positions of the daughter boards 4 adjacent to the rail 3 are provided with air exhaust ducts 6 from top to bottom, that is, the strip-shaped air exhaust ducts 6 from top to bottom are arranged as shown in fig. 1, so that good air exhaust can be realized in the length direction; when the temporary traffic guardrail is used, as shown in fig. 2, wind blows from right to left, the wind can be well guided to the air exhaust duct 6 when the daughter board 4 bears the wind, the wind flows to the left, the stress of the daughter board 4 bearing the wind is small, and the temporary traffic guardrail is not easy to blow down or can bear larger wind; when wind blows from left to right, the sub-boards 4 between the adjacent railings 3 form an included angle of 90 degrees, and the included angle 4 forms a gap, namely, the air exhaust channel 5 can allow the wind to flow to the right side.

In the second embodiment, the daughter board 4 is a structure with a V-shaped cross section, the middle part of the daughter board 4 is fixedly installed on a handrail 3, the air exhaust duct 6 is arranged at the position of the middle part adjacent to the handrail 3 from top to bottom, and gaps are formed between the two sides of the daughter board 4 and the daughter board 4 on the adjacent handrail 3, namely, the air exhaust channel 5. Namely, as shown in fig. 3, the lower sub-board 4 of the two embodiments can be directly welded with the railing 3 to be used as a whole, or can be fixed through the fastener 7, and can be fixed or detachable, so that different use requirements are facilitated. The difficulty of welding or fixing is higher in the first embodiment, and the requirement on limiting the angle of the daughter board 4 during processing and manufacturing of workers is higher; under the second kind of embodiment, through carrying out bending process to daughter board 4, form and confirm the shape, the staff's of being more convenient for fast weld or fixed.

After or before the plurality of sub-boards 4 in the shape of broken lines are installed on the railing 3, workers can set warning characters, marks or advertisements required for pasting or drawing on the sub-boards; for the detachable daughter board 4, the daughter board 4 can be replaced to replace the content on the daughter board, so that the temporary traffic guardrail is more flexible to use, and different warning and propaganda function effects are ensured; and this interim traffic guardrail is difficult to be blown down, perhaps can bear bigger wind in other words, has improved the stability of taking the interim traffic guardrail of board, and it is safer to use.

As a modified embodiment, the fastening member 7 includes an outer cylinder 71 and an inner clamping member 72, the outer cylinder 71 is fixedly mounted on the balustrade 3, the outer cylinder 71 has an inner cavity 711, the inner cavity 711 is provided with a first hole section 7111, a second hole section 7112 and a third hole section 7113 from the upper end of the outer cylinder 71 to the lower part, the diameter of the second hole section 7112 is smaller than that of the first hole section 7111 and the third hole section 7113, and the first hole section 7111 is provided with a first internal thread; the inner clamping piece 72 comprises a spiral part 721 and a pushing part 722, the spiral part 721 is provided with a through hole 7211 through which the pushing part 722 penetrates and slides axially, the pushing part 722 and the spiral part 721 are positioned circumferentially through a key groove structure, the periphery of the upper end of the spiral part 721 is provided with a circle of flange 7212, the whole periphery of the spiral part 721 is provided with a first external thread matched with the first internal thread, and the peripheral wall of the pushing part 722 is provided with a telescopic clamping piece 7221; when the inner clamping piece 72 and the outer cylinder 71 are installed in a matching mode, the holding pushing portion 722 is used for rotating the spiral portion 721, so that the spiral portion 721 is screwed into the first hole section 7111 in place, and the sub-plate 4 is clamped by the opposite faces of the flanges 7212 and the outer cylinder 71; then, the locking of the inner snap piece 72 and the outer cylinder 71 is completed by pushing the pushing part 722 to the end of the screw part 721, and simultaneously the snap piece 7221 reaches the third hole section 7113 and is snapped at the steps of the third hole section 7113 and the second hole section 7112.

As shown in fig. 4 and 5, a structure of firmly locking the fastener 7, which is not easily broken, is provided. The outer cylinder 71 can be fixedly arranged on the railing 3 by welding, and the inner clamping piece 72 is used for installing the inner clamping piece 72 for fixing after the installation hole on the daughter board 4 is aligned with the inner cavity 711. The spiral part 721 adopts an integral cylindrical structure, the flange 7212 is a round of circular truncated cone on the outer side, the integral surface has no force application point, and a user holds the pushing part 722 by hand to drive the spiral part 721 to rotate; the pushing part 722 and the spiral part 721 are circumferentially positioned through a key groove structure, and two symmetrical groups of key groove structures can be arranged as shown in the figure to ensure that the stress is uniform when the whole is matched; the keyway structure may simultaneously guide the axial sliding movement of the pushing part 722 in the through hole 7211. The first step in the installation is that the pushing part 722 is held to drive the spiral part 721 to rotate, so that the first external thread is matched with the first internal thread, the spiral part 721 is integrally screwed into the first hole section 7111 until the rib 7212 abuts against the daughter board 4, and the daughter board 4 is clamped and fixed by the rib 7212 and the end part of the outer cylinder 71; the second step is to drive the pushing part 722 to push, so that the pushing part 722 reaches the third hole section 7113 through the second hole section 7112 until the clamping piece 7221 reaches the third hole section 7113 and extends out, the clamping piece can be clamped at the step formed by the third hole section 7113 and the second hole section 7112 due to different diameters, and meanwhile, the upper end of the pushing part 722 is submerged into the end part of the spiral part 721 to form a firm clamping structure; the overall length can be designed according to the thickness of the sub-board 4, and the clamping piece 7221 can be clamped tightly, and the upper end of the pushing part 722 is just inserted into the end part of the spiral part 721. Under the structure of such design, the upper end face has no force point of the spiral part 721, the spiral part 721 cannot be detached, the pushing part 722 which is immersed in the spiral part 721 is firmly clamped in the inner cavity 711, and the structure cannot be damaged by an external tool, so that a good locking function is achieved, and the screw cannot be easily damaged by an illegal person. The retractable snap-in member 7221 can be implemented by using the prior art, that is, by using a spring structure to cooperate with the block-shaped structure of the snap-in (as shown in fig. 4 and 5). If a non-detachable structure is adopted to fix the daughter board 4, the structure designed above can be directly adopted; and when needs adopt detachable structure to fix daughter board 4, make daughter board 4 later stage when can dismantling the change, can be at the further structure of the rear design of third hole section 7113 for relieve the locking of joint 7221.

As a modified embodiment, the inner clip 72 further includes a snap ring 723, and when the screw portion 721 and the pushing portion 722 are in the initial position, the snap ring 723 is detachably snapped on the pushing portion 722 to prevent the pushing portion 721 from being pushed.

As shown in fig. 4, the snap ring 723 may be implemented by using an existing elastic structure, and may be clamped at an upper end of the pushing portion 722 opposite to the spiral portion 721 through elastic deformation as shown in the figure, so that the pushing portion 722 cannot be pushed downward by the blocking of the snap ring 723, and may be protected by the snap member 7221 located in the through hole 7211, and the pushing portion 722 above may provide a better holding length for a user to rotate the spiral portion 721 into the first hole section 7111; after the screw portion 721 finishes the screwing operation, the snap ring 723 is taken down, the pushing portion 722 is pushed, and the clamping piece 7221 can smoothly reach the third hole section 7113 with the small diameter from the second hole section 7112 with the small diameter and then stretch out for limiting. Preferably, the snap ring 723 may be a wrench structure with a long end, and is clamped on the pushing portion 722 to limit the position, so that the pushing portion can be forced to rotate, and the spiral portion 721 is detached after being in place.

As a modified embodiment, the upper end side of the pushing part 722 is provided with a positioning block 7222, the upper end of the spiral part 721 is provided with a positioning groove 7213 matched with the positioning block 7222, and when the pushing part 722 is pushed to the position, the positioning block 7222 is sunk into the positioning groove 7213 and is abutted against the groove bottom.

As shown in fig. 4, 5 and 6, by designing the overall length, the positioning block 7222 is arranged to be matched with the positioning groove 7213 to limit the pushing position of the pushing part 722, and the clamping piece 7221 can be just clamped to the third hole section 7113, so that the pushing part 722 cannot continuously float downwards, and the overall stability and structural firmness are improved.

As a modified embodiment, the fastener 7 further includes a detaching member 73, the inner cavity 711 further includes a fourth hole section 7114, the fourth hole section 7114 is located below the third hole section 7113 and penetrates through the outer cylinder 71 downwards, the diameter of the fourth hole section 7114 is larger than that of the third hole section 7113, and the fourth hole section 7114 is provided with a second internal thread; the dismounting piece 73 is matched with the size of the fourth hole section 7114, a second external thread matched with the second internal thread is arranged on the outer periphery of the dismounting piece 73, the dismounting piece 73 is installed to the fourth hole section 7114 and is immersed into the fourth hole section 7114 when in place, the end part of the dismounting piece 73 is provided with a special-shaped groove 74 for inserting a tool to rotate the dismounting piece 73, and the clamping piece 7221 is provided with a first inclined surface 72211 for sliding and retracting when the tool is abutted against the fourth hole section 7114.

As shown in fig. 4, 5 and 7, as a further preferable structure, a detaching member 73 is provided to perform a detaching function of the fastener 7, so that the sub-board 4 can be replaced for use. A fourth hole section 7114 is further arranged at the lower end of the third hole section 7113, the disassembly piece 73 is screwed in place by matching a second external thread and a second internal thread, the disassembly piece 73 is integrally of a cylindrical structure, the surface has no force point, and the disassembly piece 73 needs to be clamped into the special-shaped groove 74 by a special-shaped block with a corresponding shape and a wrench, so that the disassembly piece can be screwed in and out; the special-shaped groove 74 can prevent an illegal person from being disassembled by a common tool, thereby achieving better effects of preventing disassembly and theft. After removing the detaching element 73, the worker may further use an annular tool to extend into the fourth hole segment 7114 to the third hole segment 7113 to abut against the first inclined surface 72211 to retract the snap-in element 7221, so as to unlock the pushing portion 722 and rotate the spiral portion 721 out by the force of the pushing portion 722 to complete the overall detachment. All need assorted instrument to cooperate and remove the locking and dismantle at whole dismantlement in-process, ordinary instrument can't be dismantled, has improved holistic locking theftproof effect.

As an improved specific embodiment, the lower end of the pushing part 722 is further provided with an insertion section 7223 extending to the fourth hole section 7114, the peripheral wall of the insertion section 7223 is provided with a telescopic limiting member 7224, the other end of the dismounting member 73 opposite to the special-shaped groove 74 is provided with an insertion groove 75 for inserting the insertion section 7223, the bottom of the insertion groove 75 is provided with a limiting empty groove 76 with a diameter larger than that of the insertion groove 75, when the insertion section 7223 is inserted into the limiting empty groove 76 along the insertion groove 75 to a certain position, the limiting member 7224 reaches the limiting empty groove 76 and is clamped at the steps of the limiting empty groove 76 and the insertion groove 75; the limiting empty slot 76 is connected to the shaped slot 74, and the limiting member 7224 has a second inclined surface 72241 facing the shaped slot 74 for sliding retraction when the tool is collided.

As shown in fig. 4, 5 and 7, on the basis of the detachable member 73, a structure of a limiting member 7224 is further provided (the structure of the limiting member 7224 can be implemented in a manner of the prior art by referring to the structure of the snap member 7221), and the insertion section 7223 is inserted into the insertion groove 75 to the limiting empty groove 76, so that the limiting member 7224 blocks the detachable member 73, and the locking effect on the detachable member 73 is achieved; for the step positions of the clamping piece 7221 clamped on the third hole section 7113 and the second hole section 7112 and the step positions of the limiting piece 7224 clamped on the limiting empty groove 76 and the insertion groove 75, the whole structure length can be finely processed, and the clamping piece and the limiting piece can be firmly clamped at the same time. When a wrong person wants to rotate the detaching member 73 by using some tool to engage the irregular groove 74, the detaching member 73 cannot be rotated because the lock of the stopper 7224 cannot be released, and thus the whole locking performance is better. For the shaped groove 74, a C-shaped groove structure as shown in fig. 7 can be selected, and by means of a matched C-shaped tool, the C-shaped tool extends into the shaped groove 74 to the limit empty groove 76 by the length thereof, and collides with the second inclined surface 72241 to retract the limit piece 7224, so that the lock of the pushing part 722 can be released, and the dismounting member 73 is rotated on the premise that the insertion tool is completed, so that the axial position of the limit piece 7224 is separated from the limit empty groove 76, and the dismounting member 73 is rotated continuously. The above structure thus further improves the locking effect and overall stability, making it difficult for a person without a mating tool to remove the fastener 7.

As a modified embodiment, the snap members 7221 and the limit members 7224 are arranged in two or three groups uniformly on the circumference.

As shown in fig. 4 and 5, when two groups of conditions are set and three groups of conditions are set, the stress of the whole body can be uniform by means of uniform setting, and the clamping firmness is good; it can also be structurally ensured that the shaped groove 74, e.g. a C-shaped groove, can abut against the stop 7224 for retraction after being inserted into the tool; if the limiting member 7224 is not located at the position of the C-shaped groove structure, the limiting member 7224 may be located at the projection position of the C-shaped groove structure for collision unlocking by rotating the dismounting member 73 within a small range.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.