CN117985188A

CN117985188A - Anticreep formula fastening ware

Info

Publication number: CN117985188A
Application number: CN202410407973.0A
Authority: CN
Inventors: 张智鹏; 张俊义; 袁玉颖; 张诗涵
Original assignee: Taizhou Junpeng Special Equipment Co ltd
Current assignee: Taizhou Junpeng Special Equipment Co ltd
Priority date: 2024-04-07
Filing date: 2024-04-07
Publication date: 2024-05-07
Anticipated expiration: 2044-04-07

Abstract

The invention relates to the technical field of fastening devices, in particular to an anti-falling fastening device. Including the handle, the handle rigid coupling has the fixed column, the handle is provided with first through-hole and second through-hole, the handle with jointly around being equipped with the meshbelt between the fixed column, the meshbelt is followed the fixed column is kept away from one side of first through-hole passes, then the meshbelt passes first through-hole passes again the second through-hole, afterwards the meshbelt is followed the handle with pass between the fixed column, at last follow the fixed column is kept away from one side of first through-hole passes. According to the invention, the braid penetrates into the connection between the handle and the fixed column, when the braid is not stressed, the use length of the braid can be easily adjusted, when the braid is fixed, the position relationship among the handle, the fixed column and the braid is changed, the braid is tensioned, and when the braid is stressed, different parts of the braid are mutually extruded, so that the connection between the braid and the handle is tighter.

Description

Anticreep formula fastening ware

Technical Field

The invention relates to the technical field of fastening devices, in particular to an anti-falling fastening device.

Background

When the rolling ship is used for transporting goods (such as vehicles, etc.), the fastening devices are required to be used for fixing the goods, the fastening devices are provided with two hooks, when the fastening devices are used for fixing the goods, the hooks on one side are hung at the fixing positions of the goods, the hooks on the other side are hung on holes formed in the rolling ship, each piece of goods is fixed through a plurality of fastening devices arranged in the circumferential direction, so that the situation that the goods are shifted due to shaking in the sailing of the rolling ship and then the goods are prevented from being damaged due to impact is avoided, the conventional fastening devices are mostly ratchet-type fastening devices, when the fastening devices are used, the ratchet wheels are driven to drive the sleeves to rotate through repeatedly swinging the handles with the pawls, so that the sleeves can gradually tighten or loosen the webbing once, but the mode only can carry out small-section gathering on the webbing once, the efficiency is extremely low, thousands of fastening devices are required to be used for transporting and each piece of goods, the fastening devices are required to be used for three four fastening devices, the time is wasted, and the time wasted for unloading the rolling ship is greatly prolonged due to the fact that the fastening devices are thousands of fastening devices are used.

Disclosure of Invention

The present invention overcomes the shortcomings noted in the background above by providing an anti-slip tie-down.

The technical implementation scheme of the invention is as follows: the utility model provides an anticreep formula binding, is including the handle, the handle rotates and is connected with first connecting piece, first connecting piece is provided with first couple, the handle is close to one side rigid coupling of first connecting piece has the fixed column, the handle is close to one side of first connecting piece is provided with first through-hole and second through-hole, the handle with be equipped with the meshbelt jointly around between the fixed column, the handle is provided with symmetrical distribution's arch, symmetrical distribution the arch all with first connecting piece spacing cooperation, the meshbelt is followed the fixed column is kept away from one side of first through-hole, then the meshbelt passes the first through-hole passes again the second through-hole, afterwards the meshbelt follows the handle with pass between the fixed column, at last follow the fixed column is kept away from one side of first through-hole passes, the meshbelt is kept away from one end rigid coupling of handle has first axis of rotation, first axis of rotation is connected with the receiver, the receiver rotates and is connected with the second connecting piece, the second connecting piece is provided with the second couple.

Still further, the first hook and the second hook are both provided with a connecting hole, the diameter of the connecting hole of the first hook is larger than that of the first connecting piece, the diameter of the connecting hole of the second hook is larger than that of the second connecting piece, the first connecting piece passes through the connecting hole of the first hook, and the second connecting piece passes through the connecting hole of the second hook.

Still further, the handle is provided with two corners, the rotation junction of handle and first connecting piece is located the fixed column with the adjacent turning link of handle is kept away from the one side of first through-hole.

Still further, the handle, the first connecting piece, the first hook, the first rotating shaft, the storage box and the second hook are all metal pieces, and are soaked in PA (polyamide) materials.

Further, the width of the webbing is 30 mm-32 mm, and the thickness of the webbing is 3.0 mm-3.3 mm for increasing the tensile strength of the webbing.

Furthermore, the fixing column and the second connecting piece are metal pieces, and Dacromet is adopted for electroplating.

Still further still, still include the symmetric distribution's fixed shell, the symmetric distribution the fixed shell all rigid coupling in the receiver, the symmetric distribution the fixed shell all with first axis of rotation rotates to be connected, first axis of rotation with one of them be provided with the torsional spring between the fixed shell, first axis of rotation is located another one side rigid coupling in the fixed shell has the ratchet, another the fixed shell with joint rotation is connected with the second axis of rotation between the receiver, the second axis of rotation rigid coupling has the pawl, the pawl with ratchet limit fit, the pawl with be provided with the torsional spring between the receiver, be close to the ratchet the fixed shell sliding connection has the slide bar, through rack-and-pinion drive between the slide bar with the second axis of rotation.

Furthermore, a reduction gearbox is fixedly connected to the fixed shell far away from the ratchet wheel, a one-way wheel is commonly arranged between an output shaft of the reduction gearbox and the first rotating shaft, and a rotating handle is fixedly connected to an input shaft of the reduction gearbox.

Further, the reduction gearbox is a planetary gearbox for providing a higher torque and shock resistance than conventional gearboxes.

Furthermore, the rotating handle is snowflake-shaped, and the diameter of the circumscribing circle of the rotating handle is larger than that of the reduction gearbox, so that the force required by the rotation of the rotating handle is reduced.

The invention has the following advantages: according to the invention, the braid penetrates into the connection between the handle and the fixed column, when the braid is not stressed, the use length of the braid can be easily adjusted, when the braid is fixed, the position relationship among the handle, the fixed column and the braid is changed, the braid is tensioned, and when the braid is stressed, different parts of the braid are mutually extruded, so that the connection between the braid and the handle is tighter.

Through the one side perk that makes the handle keep away from first connecting piece, the handle is hugged closely the meshbelt when avoiding the meshbelt to take up and is led to inconveniently opening to make the meshbelt utilize specific mode of weaving to increase its pliability and wearability, the metalwork in this device adopts Dacromet to electroplate or adopts PA material to soak to mould simultaneously, thereby strengthens the corrosion resistance of metalwork.

When the roll-on-roll ship shakes by a large margin to shift cargoes, the first rotating shaft is utilized to roll the loosened webbing, so that the first hook and the second hook are prevented from falling off due to loosening, and damage to cargoes due to unstable fixation is avoided.

The first rotating shaft is further tightened by utilizing the reduction gearbox to strengthen the fixing effect of the device on cargoes, and meanwhile, the unidirectional wheels are arranged between the reduction gearbox and the first rotating shaft, so that the resistance of the first rotating shaft when the webbing is wound is reduced, and the loose webbing is wound more rapidly.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a partial schematic view of a perspective structure of a side of the handle of the present invention;

FIG. 3 is a partial schematic view of a three-dimensional structure of the pull handle and the fixing post of the present invention;

FIG. 4 is a partial schematic view of a perspective structure of a side of the storage box of the present invention;

FIG. 5 is a perspective view of a housing and a stationary housing of the present invention;

FIG. 6 is a plan view of the webbing of the present invention when it is tensioned;

FIG. 7 is a plan view of the webbing of the present invention as it is released;

FIG. 8 is a schematic perspective view of the components in the stationary housing adjacent to the ratchet wheel of the present invention.

Meaning of reference numerals in the drawings: 1: handle, 101: first via, 102: second through hole, 103: protrusion, 2: first connector, 3: first couple, 4: fixing column, 5: webbing, 6: first rotation axis, 7: storage box, 8: second connector, 9: second couple, 10: fixed shell, 11: ratchet wheel, 12: second rotation shaft, 13: pawl, 14: slide bar, 15: reduction gearbox, 16: unidirectional wheel, 17: the handle is rotated.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent. It is only stated that the terms of orientation such as up, down, left, right, front, back, inner, outer, etc. used in this document or the imminent present invention, are used only with reference to the drawings of the present invention, and are not meant to be limiting in any way.

Example 1: the anti-drop type fastening device comprises a handle 1, wherein the handle 1 consists of a folded plate at the middle part and baffle plates at the left side and the right side, the rear side of the handle 1 is rotationally connected with a C-shaped first connecting piece 2, the rear side of the first connecting piece 2 is provided with a first hook 3, the first hook 3 is provided with a connecting hole, the diameter of the connecting hole is larger than that of the first connecting piece 2, so that the device can adapt to torsion in all directions, the situation that the torsion of a braid 5 causes uneven stress to accelerate and damage is avoided, a fixed column 4 is fixedly connected between the two baffle plates of the handle 1, a first through hole 101 and a second through hole 102 are arranged at the rear side of the folded plate part of the handle 1, a braid 5 is wound between the handle 1 and the fixed column 4, the width of the braid is 30-32 mm, the thickness of the braid is 3.0-3.3 mm, the tensile property of the braid is used for increasing, the handle 1 is provided with two bulges 103 which are distributed left and right symmetrically, the bulges 103 are positioned on adjacent baffle plates on the handle 1, the two bulges 103 are in limit fit with the first connecting piece 2, the webbing 5 passes through the lower side of the fixed column 4, then the webbing 5 passes through the first through hole 101 and then passes through the second through hole 102, then the webbing 5 passes through between the handle 1 and the fixed column 4 and finally passes through the lower side of the fixed column 4, the webbing 5 wound on the lower side of the fixed column 4 is two layers at the moment, the webbing 5 of the outer layer is a tension part, when the webbing 5 of the outer layer is stressed, the webbing 5 of the outer layer is matched with the fixed column 4 to extrude the webbing 5 of the inner layer, so that the webbing 5 is prevented from falling off, the front end of the webbing 5 is fixedly connected with a first rotating shaft 6, the first rotating shaft 6 is rotationally connected with a storage box 7, the first rotating shaft 6 penetrates the left side and the right side of the storage box 7, the front side of the storage box 7 is rotationally connected with a C-shaped second connecting piece 8, the front side of the second connecting piece 8 is provided with a second hook 9, the second hook 9 is provided with a connecting hole, the diameter of the connecting hole is larger than that of the second connecting piece 8, the handle 1 is provided with two corners, the rotational connection part of the handle 1 and the first connecting piece 2 is positioned at one side of the connecting line between the adjacent corners of the fixed column 4 and the handle 1, which is far away from the first through hole 101, when the webbing 5 is tensioned, the corner of the rear side of the handle 1 is attached to the webbing 5, the part of the webbing 5 positioned between the corner of the rear side of the handle 1 and the storage box 7 is in a straight line with the first connecting piece 2, the part of the webbing 5 positioned between the corner of the rear side of the handle 1 and the fixed column 4 is at a certain angle with the first connecting piece 2, and the part that meshbelt 5 is located between handle 1 rear side corner and fixed column 4 is biased to be close to one side of handle 1 to make handle 1's pulling force to handle 1 make handle 1 rotate clockwise from left side view direction when meshbelt 5 operating condition, the front side perk of handle 1 for dismantle, avoid handle 1 laminating meshbelt 5 completely, unable pull handle 1 between handle 1 and the meshbelt 5 of staff's unable insertion during dismantlement, handle 1, first connecting piece 2, first couple 3, first pivot 6, receiver 7 and second couple 9 are the metalwork, and adopt the PA material to carry out the plastic-immersion, be used for reinforcing corrosion resistance and the wearability of above-mentioned part, fixed column 4 and second connecting piece 8 are the metalwork, and adopt dacromet to electroplate for reinforcing the corrosion resistance of above-mentioned part.

When the device is used, the second hook 9 is firstly hung on a hole on a deck, then the first hook 3 is hung at a fixed position of goods, then the braid 5 passes through the lower side of the fixed column 4, then the braid 5 passes through the upper side from the lower side of the first through hole 101, passes through the lower side from the upper side of the second through hole 102, then the braid 5 passes through between the handle 1 and the fixed column 4 and finally passes through the lower side of the fixed column 4, at the moment, the using part of the braid 5 presses the movable part of the braid 5 with the fixed column 4, the using length of the braid 5 is regulated and reserved for a certain length during winding, after the length regulation is finished, the handle 1 is turned by pulling, the handle 1 is turned clockwise around the turning joint of the handle 1 and the first connecting piece 2 from the left view direction, the fixed column 4 is driven to rotate when the handle 1 is turned, the handle 1 and the fixed column 4 are matched to pull the braid 5, and the webbing 5 is wound around the portion between the handle 1 and the fixing post 4 to be bent and pulled backward while bending, so that the length reserved for the webbing 5 is consumed, and the webbing 5 is tensioned, and when the middle portion of the inner side of the handle 1 is in contact with the webbing 5, the fixing is completed, and at this time, the tension of the webbing 5 to the handle 1 and the fixing post 4 is directed to the lower right side as shown in fig. 4, but the stress direction of the handle 1 and the fixing post 4 is located at the upper side of the rotational connection portion of the handle 1 and the first connecting piece 2, so that the tension of the webbing 5 to the handle 1 and the fixing post 4 can rotate clockwise from the left view direction, so that the handle 1 does not rotate counterclockwise to be released, and the larger the tension of the webbing 5 is, the larger the portion of the webbing 5 wound on the outer side of the fixing post 4 cooperates with the fixing post 4 to the portion of the webbing 5 to be tightly attached to the fixing post 4, the tighter the fixation.

When the use is completed, only the handle 1 needs to be rotated anticlockwise from the left view direction, and when the part of the webbing 5 between the adjacent corners on the fixing column 4 and the handle 1 is wound to the lower side from the upper side of the rotating connection part of the handle 1 and the first connecting piece 2, the pulling force of the webbing 5 on the handle 1 and the fixing column 4 faces to the upper right side shown in fig. 4, and the handle 1 and the fixing column 4 can be rotated anticlockwise under the pulling force generated by the webbing 5, so that the device is convenient to detach, and after the device is loosened, the first hook 3 and the second hook 9 are taken down from the hanging part.

Example 2: on the basis of embodiment 1, as shown in fig. 5 and 8, the device further comprises two fixing shells 10 which are symmetrically distributed left and right, the two fixing shells 10 are fixedly connected to the left side and the right side of the storage box 7 respectively, the two fixing shells 10 are rotationally connected with the first rotating shaft 6, the middle parts of the two fixing shells 10 penetrate through the first rotating shaft 6, a torsion spring is arranged between the first rotating shaft 6 and the left fixing shell 10 and used for enabling the first rotating shaft 6 to wind the webbing 5 on the first rotating shaft 6, the webbing 5 is wound on the first rotating shaft 6 and is stored in the storage box 7 at first time, so that the device is convenient to stack and take, inconvenience caused by winding mutually after the conventional plurality of webbing 5 are put together is avoided, a ratchet wheel 11 is fixedly connected to the right side of the first rotating shaft 6, the ratchet wheel 11 is positioned in the right fixing shell 10, a second rotating shaft 12 is rotationally connected between the right side fixing shell 10 and the storage box 7, the second rotating shaft 12 is fixedly connected to the ratchet wheel 13, the ratchet wheel 13 is in limit fit with the ratchet wheel 11, when the ratchet wheel 11 is in contact with the ratchet wheel 11, the ratchet wheel 11 can only rotates anticlockwise, the ratchet wheel 11 rotates from the left direction, the ratchet wheel 13 is separated from the storage box 13 from the storage box, and the ratchet wheel 11 is in sliding contact with the torsion spring, and the ratchet wheel 11 is in a sliding state, and the ratchet wheel is in a sliding state, and the front rod is connected with the ratchet wheel 11, and the ratchet wheel is in a sliding state, and the rotation rod is in a sliding state, and the front rod is in the state through the rotation, and is in the driving rod, and is in the driving 14, and is in sliding.

As shown in fig. 5, the left fixed shell 10 is fixedly connected with a reduction gearbox 15, the reduction gearbox 15 is a planetary gearbox and is used for providing higher torque and shock resistance than a traditional gearbox, a unidirectional wheel 16 is commonly arranged between an output shaft of the reduction gearbox 15 and the first rotating shaft 6, when the first rotating shaft 6 winds the webbing 5, the first rotating shaft 6 cannot drive the output shaft of the reduction gearbox 15 to rotate due to the action of the unidirectional wheel 16, so that the resistance born by the first rotating shaft 6 during rotation is reduced, the input shaft of the reduction gearbox 15 is fixedly connected with a rotating handle 17, the rotating handle 17 is of a snowflake type, and the diameter of a circumcircle of the rotating handle 17 is larger than that of the reduction gearbox 15 and is used for reducing the force required by the rotation of the rotating handle 17.

Before the device is used, the webbing 5 is wound on the first rotating shaft 6 and is retracted into the storage box 7, when the device is used, the second hook 9 is firstly hung on a hole on the deck, then the first hook 3 is hung on a fixed position of goods, then the sliding rod 14 is pulled forwards, the sliding rod 14 drives the second rotating shaft 12 to rotate anticlockwise from the left view direction through the rack and pinion, the second rotating shaft 12 drives the pressing pawl 13 to rotate and further store force of an adjacent torsion spring, meanwhile, the pressing pawl 13 presses adjacent teeth on the ratchet 11, the ratchet 11 rotates anticlockwise from the left view direction, then the pawl 13 is separated from the ratchet 11, then the webbing 5 is pulled out of the storage box 7, in the pulling process, the webbing 5 drives the first rotating shaft 6 to rotate clockwise from the left view direction, the adjacent torsion spring stores force when the first rotating shaft 6 rotates, after the pulled webbing 5 reaches a proper length, the webbing 5 is wound between the webbing 1 and the fixed column 4, and then the device is fixed according to the fixing method.

When the pulling force of the webbing 5 is required to be increased, the rotating handle 17 rotates anticlockwise from the left view direction, the rotating handle 17 decelerates through the reduction gearbox 15 to drive the one-way wheel 16 to rotate anticlockwise from the left view direction, the one-way wheel 16 drives the first rotating shaft 6 to rotate and enable the adjacent torsion spring to store force, the first rotating shaft 6 winds the webbing 5 on the rotating handle, the ratchet wheel 11 is driven to rotate by the first rotating shaft 6, teeth on the ratchet wheel 11 squeeze the pawl 13 when rotating, the pawl 13 enables the adjacent torsion spring to store force and drive the second rotating shaft 12 to rotate, the second rotating shaft 12 drives the sliding rod 14 to move forwards through the gear rack, after the pulling force is adjusted, the pawl 13 drives the second rotating shaft 12 to reset under the action of the adjacent torsion spring and drives the sliding rod 14 to reset, and meanwhile the pawl 13 locks the ratchet wheel 11 again to rotate clockwise from the left view direction, and the first rotating shaft 6 is prevented from rotating clockwise.

When the fixed goods of this device leads to the aversion greatly because of the roll-on ship range of rocking, the goods removes the tighter of this device by being pulled of opposite side, the goods removes this device of opposite side and relaxes, the first axis of rotation 6 on this device of relaxation this moment is anticlockwise rotated from left side view direction under the effect of adjacent torsional spring, when first axis of rotation 6 rotates, because of being provided with the one-way wheel 16 between first axis of rotation 6 and the reducing gear box 15, so can not receive the resistance of reducing gear box 15 when first axis of rotation 6 rotates, tighten up the meshbelt 5 of relaxation, thereby avoid first couple 3 or second couple 9 to lead to droing because of meshbelt 5 is lax.

When this device is rocked because of the barreled ship and is led to further becoming tight, the meshbelt 5 is because of receiving the pulling force grow and produce vertical deformation and become longer, the pulling force that the meshbelt 5 produced becomes big simultaneously, if directly pull handle 1 dismantles this moment and can lead to handle 1 fast rotation, can lead to dismantling workman's hand injury when handle 1 fast rotates, consequently, need first with the pulling force of meshbelt 5 to dismantle partly, thereby avoid the workman to be injured, therefore when dismantling in this state, need pull sliding rod 14 forward earlier, but pawl 13 is blocked because of by ratchet 11, so can't be through pulling sliding rod 14 transmission pawl 13 contact to ratchet 11's spacing, at this moment from left side view direction anticlockwise rotation handle 17, rotate 17 transmission ratchet 11 anticlockwise rotation from left side view direction, make ratchet 11 with the separation of squeezing out of pawl 13, pawl 13 loses ratchet 11's spacing, pull sliding rod 14 in order to keep pawl 13 and ratchet 11 separation, so 5 receive great pulling force, so 5 pulls first rotation axis of rotation 6, simultaneously, the portion of meshbelt 5 winding on first rotation axis 6 is played in order to reduce 5 pull degree, conveniently pull rod 14 is dismantled, make things convenient for this device to dismantle the adjacent ratchet wheel 14 and reset, when the device is reset, and the effect is released to ratchet 11 is reset to ratchet 14, and is reset to the limit for the next device.

While the present disclosure has been shown and described with reference to certain exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents. The scope of the disclosure should, therefore, not be limited to the above-described embodiments, but should be determined not only by the following claims, but also by the equivalents of the following claims.

Claims

1. The utility model provides an anticreep formula tie-down ware, its characterized in that, including handle (1), handle (1) rotation is connected with first connecting piece (2), first connecting piece (2) are provided with first couple (3), handle (1) is close to one side rigid coupling of first connecting piece (2) has fixed column (4), handle (1) is close to one side of first connecting piece (2) is provided with first through-hole (101) and second through-hole (102), handle (1) with jointly around being equipped with meshbelt (5) between fixed column (4), handle (1) are provided with symmetrical distribution's arch (103), symmetrical distribution protruding (103) all with first connecting piece (2) spacing cooperation, meshbelt (5) follow fixed column (4) keep away from one side of first through-hole (101) is passed, then meshbelt (5) pass first through-hole (101) are passed again second through-hole (102), then handle (1) with one side (4) are kept away from between fixed column (1) and fixed column (4) are passed in the fixed column (6) is kept away from to one side fixed column (4), the first rotating shaft (6) is rotationally connected with the storage box (7), the storage box (7) is rotationally connected with the second connecting piece (8), and the second connecting piece (8) is provided with the second hook (9).

2. The anti-drop-out fastening device according to claim 1, characterized in that the first hook (3) and the second hook (9) are both provided with connecting holes, the diameter of the connecting holes of the first hook (3) is larger than that of the first connecting piece (2), the diameter of the connecting holes of the second hook (9) is larger than that of the second connecting piece (8), the first connecting piece (2) passes through the connecting holes of the first hook (3), and the second connecting piece (8) passes through the connecting holes of the second hook (9).

3. The anti-drop-out fastening device according to claim 1, wherein the handle (1) is provided with two corners, and the rotational connection of the handle (1) and the first connecting piece (2) is located at a side of the connecting line between the adjacent corners of the fixing column (4) and the handle (1) away from the first through hole (101).

4. A fastening device according to claim 3, wherein the handle (1), the first connecting piece (2), the first hook (3), the first rotating shaft (6), the storage box (7) and the second hook (9) are all made of metal, and are impregnated with PA material.

5. The anti-drop-out tie-down according to claim 1, wherein the webbing (5) has a width of 30-32 mm, and the webbing (5) has a thickness of 3.0-3.3 mm for increasing the tensile strength of the webbing (5).

6. The anti-drop-out tie-down according to claim 2, characterized in that the fixing post (4) and the second connecting piece (8) are both metal pieces and are galvanised with dacromet.

7. The anti-drop fastening device according to claim 1, further comprising a symmetrically distributed fixing shell (10), wherein the symmetrically distributed fixing shell (10) is fixedly connected to the accommodating box (7), the symmetrically distributed fixing shell (10) is rotationally connected with the first rotating shaft (6), a torsion spring is arranged between the first rotating shaft (6) and one of the fixing shells (10), a ratchet wheel (11) is fixedly connected to one side of the first rotating shaft (6) located in the other fixing shell (10), a second rotating shaft (12) is jointly rotationally connected between the other fixing shell (10) and the accommodating box (7), a pawl (13) is fixedly connected to the second rotating shaft (12), the pawl (13) is in limit fit with the ratchet wheel (11), a torsion spring is arranged between the pawl (13) and the accommodating box (7), a sliding rod (14) is slidingly connected to the fixing shell (10) close to the ratchet wheel (11), and a second rotating shaft (12) is fixedly connected to one side of the other fixing shell (10) through a rack.

8. The anti-drop fastening device according to claim 7, characterized in that the fixed shell (10) far away from the ratchet wheel (11) is fixedly connected with a reduction gearbox (15), a unidirectional wheel (16) is jointly arranged between an output shaft of the reduction gearbox (15) and the first rotating shaft (6), and an input shaft of the reduction gearbox (15) is fixedly connected with a rotating handle (17).

9. A drop-out prevention tie-down according to claim 8, wherein the reduction gearbox (15) is a planetary gearbox for providing a higher torque and impact resistance than a conventional gearbox.

10. The anti-drop-out type fastening device according to claim 8, wherein the rotating handle (17) is snowflake-shaped, and the diameter of the circumcircle of the rotating handle (17) is larger than the diameter of the reduction gearbox (15), so as to reduce the force required by the rotation of the rotating handle (17).