CN115624699A - Automatic locking device of tower crane cat ladder safety belt - Google Patents
Automatic locking device of tower crane cat ladder safety belt Download PDFInfo
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- CN115624699A CN115624699A CN202211110583.4A CN202211110583A CN115624699A CN 115624699 A CN115624699 A CN 115624699A CN 202211110583 A CN202211110583 A CN 202211110583A CN 115624699 A CN115624699 A CN 115624699A
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B35/00—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion
- A62B35/0006—Harnesses; Accessories therefor
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B1/00—Devices for lowering persons from buildings or the like
- A62B1/06—Devices for lowering persons from buildings or the like by making use of rope-lowering devices
- A62B1/16—Life-saving ropes or belts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
- F16F15/067—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Ladders (AREA)
- Emergency Lowering Means (AREA)
Abstract
The invention relates to the technical field of safety, in particular to an automatic locking device for a tower crane ladder stand safety belt, which comprises a U-shaped sliding rail, a fixing mechanism, a sliding block and a safety belt; the two U-shaped sliding rails are parallel to each other, and the fixing mechanism comprises a supporting frame and a falling protector; the two ends of the support frame are respectively arranged on the corresponding U-shaped slide rails, two falling protectors are arranged on the support frame, safety ropes capable of automatically retracting are arranged at the bottoms of the falling protectors, each U-shaped slide rail is provided with a sliding block in a sliding manner, the safety ropes are connected with the tops of the sliding blocks, each sliding block is provided with a mounting groove, and a locking mechanism is arranged in each mounting groove; be provided with the joint piece on the safety belt, locking mechanism is provided with the arc that is used for with the joint piece fixed and colludes the claw including rotating the fixed block that sets up in the mounting groove, the one end of fixed block. This application is through the cooperation of safety hook, U-shaped slide rail and sliding block to can fix fast and dismantle, save the loaded down with trivial details nature when the cat ladder, improve the security of cat ladder.
Description
Technical Field
The invention relates to the technical field of safety, in particular to an automatic locking device for a safety belt of a tower crane ladder stand.
Background
The safety belt of the current tower crane ladder can be tied on the waist, the connected hook is hung above a body path, and after the body passes, the safety hook is taken off and then hung above, so that the safety belt slowly goes up.
However, due to the fact that operation is inconvenient, the situation that safety belts are not used may exist, an operator can grab the pedals on the vertical ladder stand by hands, and once the operator loses hands or climbs empty, serious casualty accidents are inevitably caused, and great threats are caused to safety construction.
The automatic locking device for the safety belt of the tower crane ladder stand is safe in protection and convenient to use, and the problems are solved better in safety when the safety belt is worn and the situation is out of order.
Disclosure of Invention
To the problem that prior art exists, provide a tower crane cat ladder safety belt automatic locking device, through the setting of safety hook, U-shaped slide rail and slip slider to reduce the in-process of staff climbing, exchange the problem of couple repeatedly, through clamping mechanism, can be when staff is tired, fix the sliding block, make the staff at the in-process of climbing, can have a rest, alleviate the fatigue of climbing.
In order to solve the problems of the prior art, the invention adopts the technical scheme that:
a tower crane ladder safety belt automatic locking device comprises a U-shaped sliding rail, a fixing mechanism, a sliding block and a safety belt;
the number of the U-shaped slide rails is two, the two U-shaped slide rails are arranged in a vertical state and are parallel to each other, a plurality of cross rods are arranged between the two U-shaped slide rails and are arranged in a horizontal state, and the cross rods are arranged at equal intervals along the length direction of the U-shaped slide rails;
the fixing mechanisms are arranged between the two U-shaped sliding rails at equal intervals, and each fixing mechanism comprises a supporting frame and a falling protector;
two ends of the supporting frame are respectively arranged on one side of the corresponding U-shaped sliding rail far away from the opening;
the two falling protectors are fixedly arranged at the center of the support frame in a vertical state, a safety rope capable of automatically retracting is arranged at the bottom of each falling protector, an inclined hole for the installation rope to pass through is formed in one side, close to each other, of each U-shaped slide rail, and the safety rope passes through the corresponding inclined hole and extends downwards along the length direction of the U-shaped slide rail;
two sliding blocks are arranged below each fixing mechanism, the two sliding blocks can be arranged on the corresponding U-shaped sliding rails in a sliding mode, and one end, far away from the falling protector, of each safety rope is arranged at the center of one end, close to the falling protector, of the corresponding sliding block;
one side of each sliding block, which is far away from the U-shaped sliding rail, is provided with a mounting groove, the mounting groove is arranged at one end of each sliding block, which is close to the mounting rope, and a locking mechanism is arranged in each mounting groove;
clamping blocks are arranged at two ends of the safety belt, and clamping interfaces are arranged on the clamping blocks;
locking mechanism is including rotating the fixed block that sets up in the mounting groove, and the one end of fixed block is provided with and is used for colluding the claw with the fixed arc of joint piece.
Preferably, the locking mechanism further comprises a pressing block and a torsion spring;
the pressing block is slidably arranged on the inner wall of one side, away from the installation rope, of the installation groove, and a space for the clamping block to be placed is formed between one side, facing the installation rope, of the pressing block and the installation groove;
the fixing block is V-shaped, rotating shafts are arranged on two sides of the corner of the fixing block, circular grooves are formed in the mounting groove along the inner walls of two sides of the length direction of the U-shaped sliding rail, the rotating shafts can be rotatably arranged in the corresponding circular grooves, the arc-shaped hook claws face the direction far away from the pressing block, and one ends of the fixing block far away from the arc-shaped hook claws are arranged between the pressing block and the inner wall of the bottom of the mounting groove;
the number of the torsional springs is two, the torsional springs are arranged on the corresponding rotating shafts, the inner walls of the two sides of the mounting groove in the length direction of the U-shaped sliding rail are provided with limiting blocks for fixing the torsional springs, one ends of the torsional springs are in contact with the corresponding limiting blocks, and the other ends of the torsional springs are arranged in the depressions of the fixing blocks;
one side of the pressing block close to the fixed block is provided with a rectangular avoiding port for avoiding the fixed block.
Preferably, the inner wall of the bottom of the mounting groove is also provided with a reset mechanism for resetting the button;
the reset mechanism comprises a support column, a connecting column, a first spring and a limiting ring;
the two support columns are arranged on the inner wall of the bottom of the mounting groove in a horizontal state and are arranged on two sides of the fixing block;
a first round hole is formed in one end, far away from the inner wall of the bottom of the mounting groove, of each supporting column, two first sliding grooves are formed in each first round hole, and the two first sliding grooves are arranged in a mirror image mode relative to the axis of each first round hole;
the outer wall of one end of each connecting column is provided with two first sliding strips corresponding to the first sliding grooves, the connecting columns can be arranged in the corresponding first round holes in a sliding manner, and the first sliding strips can be arranged in the corresponding first sliding grooves in a sliding manner;
one ends of the two connecting columns, which are far away from the supporting column, are arranged on the inner wall of the rectangular avoidance opening of the pressing block;
the two first springs are arranged in the corresponding first round holes, and two ends of each first spring respectively touch the inner wall of the bottom of the corresponding first round hole and the corresponding connecting column;
the spacing ring has two, and two spacing ring settings are kept away from the one end of mounting groove inner wall at the support column, and the center department of spacing ring is provided with the first perforation that only supplies the spliced pole to pass.
Preferably, the sliding block is further provided with a protection box for protecting the pressing block, the protection box is the same as the pressing block in shape, the opening of the protection box faces the direction away from the pressing block, and a sealing cover is hinged in the opening of the protection box.
Preferably, the one end of articulated is kept away from to sealed lid is provided with first magnet, is provided with the second magnet that first magnet corresponds on the protection box, and first magnet and second magnet inter attraction.
Preferably, a second round hole is further formed in one side, away from the U-shaped sliding rail, of each sliding block, and the second round hole is located at one end, away from the mounting groove;
each second round hole is internally provided with a limiting mechanism for fixing a sliding block;
the limiting mechanism comprises a rotating column, a limiting column, a second spring and a steel rope;
an annular sliding groove is formed in the edge of the top of the second round hole in the circumferential direction, an annular sliding block is arranged on the rotating column, the annular sliding block can be arranged in the annular sliding groove in a sliding mode, the rotating column extends into the second round hole, and the diameter of the rotating column is smaller than that of the second round hole;
third round holes are formed in the two sides of the sliding block along the length direction of the U-shaped sliding rail, a second through hole is formed in the inner wall of the bottom of each third round hole, and the second through holes are connected with the second round holes;
a plurality of limiting holes are arranged on two sides of each U-shaped slide rail along the length direction, the limiting holes are equidistantly arranged along the length direction of the U-shaped slide rail,
the axes of the third round hole and the limiting hole are positioned on the same horizontal plane;
the inner wall of each third round hole is provided with two second sliding grooves which are arranged in a mirror image mode relative to the axis of the third round hole;
two limiting columns are arranged, one end of each limiting column is provided with two second sliding strips opposite to the second sliding grooves, the limiting columns can be slidably arranged in the corresponding third round holes, and the second sliding strips can be slidably arranged in the corresponding second sliding grooves;
two second springs are arranged in the corresponding third round holes, and two ends of each second spring are respectively contacted with the corresponding limiting column and the inner wall of the bottom of each third round hole;
two steel ropes are arranged, one end of each steel rope is arranged at the center of one end, close to the corresponding third round hole, of the limiting column, and the other end of each steel rope penetrates through the second through hole to be connected with the outer wall of the rotating column;
and a space for avoiding the steel rope is formed between the rotating column and the inner wall of the second round hole.
Preferably, a ratchet wheel is further arranged at one end, away from the second round hole, of the rotating column in the circumferential direction, the ratchet wheel is located outside the sliding block, a mounting box is further arranged on the sliding block, the mounting box is arranged in a vertical state, and an opening of the mounting box faces the direction close to the rotating column;
a pawl is hinged inside the mounting box, and one end of the pawl, which is far away from the hinge, is abutted against the ratchet wheel;
one side of the pawl close to the ratchet wheel is also provided with a tension spring, one end of the tension spring, which is far away from the pawl, is arranged in the mounting box, and the tension spring pulls the abutting claw to move towards the direction close to the pawl.
Preferably, the center of the end, away from the second round hole, of the ratchet wheel is provided with a cylindrical protrusion, the outer wall of the cylindrical protrusion is provided with a plurality of anti-slip strips, the length direction of the anti-slip strips is the same as the axis direction of the cylindrical protrusion, and the anti-slip strips are arranged at equal intervals in the circumferential direction of the cylindrical protrusion.
Preferably, rectangular grooves are formed in two ends of the sliding block and communicated with the second round hole;
a limiting plate is arranged in each rectangular groove, and a third through hole for the limiting column to penetrate is formed in the center of each limiting plate.
Preferably, semicircular grooves are further formed in two sides of one end, close to the U-shaped sliding rail, of the sliding block, a plurality of idler wheels are arranged in the semicircular grooves in a rotating mode, the idler wheels are arranged along the length direction of the U-shaped sliding rail at equal intervals, and the idler wheels are attached to inner walls of two sides of the bottom of the U-shaped sliding rail.
Compared with the prior art, the beneficial effect of this application is:
1. this application is through the safety hook, the setting of U-shaped slide rail and slip slider, thereby reduce the in-process of staff's climbing, the problem of couple is exchanged repeatedly, and the cooperation through joint piece and fixed block, thereby make the staff can fix the safety belt by the one hand, thereby be convenient for operate, at the in-process that the staff dropped, the safety rope is fixed to what the safety hook can be timely, make the staff can't continue to weigh down, thereby guarantee the safety in the staff, through clamping mechanism, can be when the staff is tired, fix the sliding block, make the staff at the in-process of climbing, can have a rest, alleviate the fatigue of climbing.
2. This application is through the cooperation according to pressing block, torsional spring and fixed block to the realization can be quick fix the joint piece, can guarantee through canceling release mechanical system according to the pressing block under usual state, keep keeping away from the direction of fixed block always, thereby avoid according to the in-process of pressing the pressing block at the contact fixed block, lead to fixed block and joint piece separately.
3. This application is through the setting through protection box and sealed lid to further protect according to the briquetting, when not using, first magnet and second magnet can make sealed lid and the laminating of protection box each other, under the condition of no human factor, can guarantee to press the briquetting can not influenced by the external world.
4. This application is through rotatory rotation post, thereby control two spacing posts, make spacing post can carry out round trip movement along the third round hole axis, through spacing hole on the U-shaped slide rail, the ratchet, the second spring, the mounting box, the cooperation of pawl, restrict rotation post, when the staff need have a rest, only need to lift the pawl, under the effect of second spring, spacing post can stretch into corresponding spacing downthehole, thereby fix the sliding block, when continuing the climbing, the pawl can not produce the prevention to the ratchet, make the staff can the one-hand completion operation, thereby improve the security in the staff.
5. This application is through being provided with the gyro wheel on the sliding block, and a plurality of gyro wheels slide along U-shaped slide rail bottom both sides inner wall, make the gliding process of sliding block on the U-shaped slide rail more smooth and easy.
Drawings
FIG. 1 is a perspective view of an automatic locking device for a safety belt of a tower crane ladder;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a perspective view of a safety belt in an automatic locking device for a tower crane ladder safety belt;
FIG. 4 is a front view of a hidden safety belt in an automatic locking device for a tower crane ladder safety belt;
FIG. 5 is a perspective view of a sliding block, a locking mechanism, a resetting mechanism, a limiting mechanism and a mounting box in the automatic locking device for the safety belt of the tower crane ladder stand;
fig. 6 is a perspective view of the sealing cover of fig. 5 in an opened state;
FIG. 7 is a front view of a sliding block, a locking mechanism, a resetting mechanism, a limiting mechanism and a mounting box in the automatic locking device for the safety belt of the tower crane ladder stand;
FIG. 8 is a plan sectional view taken along the line B-B in FIG. 7;
FIG. 9 is a perspective view of a sliding block in the automatic locking device for the safety belt of the tower crane ladder stand;
FIG. 10 is a perspective view of a locking mechanism in the automatic locking device for the safety belt of the tower crane ladder stand;
FIG. 11 is an exploded perspective view of a resetting mechanism in an automatic locking device for a tower crane ladder safety belt;
FIG. 12 is a perspective view of a limiting mechanism in the automatic locking device for the safety belt of the tower crane ladder stand;
fig. 13 is a perspective view of a mounting box, a tension spring and a pawl in the automatic locking device for the safety belt of the tower crane ladder stand.
The reference numbers in the figures are:
1-a U-shaped slide rail; 11-a cross-bar; 12-inclined holes; 13-a limiting hole;
2-a fixing mechanism; 21-a support frame; 22-a safety catch; 221-safety cord;
3-a sliding block; 31-mounting grooves; 311-circular grooves; 312-a stop block; 32-a protective box; 321-a second magnet; 33-a sealing cover; 331-a first magnet; 34-a second circular hole; 341-annular chute; 35-third round hole; 351-a second chute; 36-a second perforation; 37-a rectangular groove; 371-limiting plate; 372-third perforation; 38-semicircular groove; 381-rollers;
4-a safety belt; 41-a clamping block; 42-card interface;
5-a locking mechanism; 51-fixing block; 511-arc hook claw; 512-a rotating shaft; 52-pressing block; 521-rectangular dodging port; 53-torsion spring;
6-a reset mechanism; 61-support column; 611 — a first circular aperture; 612-a first runner; 62-connecting column; 621-a first slider; 63-a first spring; 64-a limit ring; 641-first perforation;
7-a limiting mechanism; 71-rotating the column; 711-annular slide block; 712-a ratchet; 713-cylindrical protrusion; 714-anti-slip strips; 72-a limit post; 721-a second runner; 73-a second spring; 74-steel cord;
8-mounting a box; 81-pawl; 82-tension spring.
Detailed Description
For a better understanding of the features and technical solutions of the present invention, as well as the specific objects and functions attained by the present invention, reference is made to the accompanying drawings and detailed description of the invention.
Referring to fig. 1 to 13, an automatic locking device for a safety belt of a tower crane ladder stand comprises a U-shaped sliding rail 1, a fixing mechanism 2, a sliding block 3 and a safety belt 4;
the number of the U-shaped slide rails 1 is two, the two U-shaped slide rails 1 are arranged in a vertical state, the two U-shaped slide rails 1 are parallel to each other, a plurality of cross rods 11 are arranged between the two U-shaped slide rails 1, the cross rods 11 are arranged in a horizontal state, and the cross rods 11 are arranged at equal intervals along the length direction of the U-shaped slide rails 1;
the number of the fixing mechanisms 2 is multiple, the fixing mechanisms 2 are arranged between the two U-shaped sliding rails 1 at equal intervals, and each fixing mechanism 2 comprises a supporting frame 21 and a falling protector 22;
two ends of the supporting frame 21 are respectively arranged at one side of the corresponding U-shaped slide rail 1 away from the opening;
the number of the falling protectors 22 is two, the two falling protectors 22 are fixedly arranged at the center of the support frame 21 in a vertical state, a safety rope 221 capable of automatically retracting is arranged at the bottom of each falling protector 22, an inclined hole 12 for allowing an installation rope to pass through is formed in one side, close to each other, of each U-shaped slide rail 1, and the safety rope 221 passes through the corresponding inclined hole 12 and extends downwards along the length direction of the U-shaped slide rail 1;
two sliding blocks 3 are arranged below each fixing mechanism 2, the two sliding blocks 3 can be arranged on the corresponding U-shaped sliding rails 1 in a sliding manner, and one end, far away from the falling protector 22, of each safety rope 221 is arranged at the center of one end, close to the falling protector 22, of the corresponding sliding block 3;
one side of each sliding block 3, which is far away from the U-shaped sliding rail 1, is provided with a mounting groove 31, the mounting groove 31 is arranged at one end of each sliding block 3, which is close to the mounting rope, and a locking mechanism 5 is arranged in each mounting groove 31;
the two ends of the safety belt 4 are provided with clamping blocks 41, and clamping interfaces 42 are arranged on the clamping blocks 41;
the locking mechanism 5 comprises a fixing block 51 which can be rotatably arranged in the mounting groove 31, and one end of the fixing block 51 is provided with an arc-shaped hook 511 which is used for fixing the clamping block 41.
The staff puts into corresponding mounting groove 31 with the joint piece 41 at safety belt 4 both ends, afterwards, the regulation can pivoted fixed block 51, make the arc collude the claw 511 and set up in joint mouth 42, thereby make the fixed setting of joint piece 41 in mounting groove 31, the staff climbs along horizontal pole 11 upwards afterwards, safety belt 4 drives two sliding blocks 3 and slides along U-shaped slide rail 1, safety rope 221 is under the traction of safety hook 22, thereby make safety rope 221 retract into corresponding safety hook 22, thereby make safety rope 221 can keep tight state, when the staff drops, sliding block 3 can be along the quick slider of U-shaped slide rail 1, at this moment, locking system in the safety hook 22 can lock safety rope 221, thereby avoid the staff to continue the tenesmus, when the staff climbs support frame 21 department, the staff adjusts fixed block 51, take out joint piece 41 from mounting groove 31, the higher position sliding block 3 of change, thereby continue to climb upwards, cooperation through joint piece 41 and fixed block 51, thereby make the staff can fix sooner.
Referring to fig. 8 to 10, the locking mechanism 5 further includes a pressing block 52 and a torsion spring 53;
the pressing block 52 can be slidably arranged on the inner wall of one side of the installation groove 31 far away from the installation rope, and a space for the clamping block 41 to be placed is formed between one side of the pressing block 52 facing the installation rope and the installation groove 31;
the fixing block 51 is in a V shape, two sides of the corner of the fixing block 51 are provided with rotating shafts 512, two side inner walls of the installation groove 31 along the length direction of the U-shaped slide rail 1 are provided with circular grooves 311, the rotating shafts 512 can be rotatably arranged in the corresponding circular grooves 311, the arc-shaped hook claw 511 faces the direction far away from the pressing block 52, and one end of the fixing block 51 far away from the arc-shaped hook claw 511 is arranged between the pressing block 52 and the inner wall of the bottom of the installation groove 31;
two torsion springs 53 are provided, the torsion springs 53 are arranged on the corresponding rotating shafts 512, the inner walls of the mounting groove 31 at two sides along the length direction of the U-shaped slide rail 1 are provided with limit blocks 312 for fixing the torsion springs 53, one ends of the torsion springs 53 contact the corresponding limit blocks 312, and the other ends of the torsion springs 53 are arranged in the depressions of the fixing blocks 51;
one side of the pressing block 52 close to the fixed block 51 is provided with a rectangular avoiding opening 521 for avoiding the fixed block 51.
Under the action of the torsion spring 53, the arc-shaped hook 511 of the fixed block 51 contacts the inner wall of the mounting groove 31 in a state of pushing the pressing block 52, when the clamping block 41 needs to be fixed, a worker pushes the pressing block 52, the pressing block 52 presses one end, far away from the arc-shaped hook 511, of the fixed block 51, the fixed block 51 can rotate along the rotating shaft 512, the arc-shaped hook 511 moves towards the direction close to the pressing block 52, a rectangular avoidance opening 521 for avoiding the fixed block 51 is formed in the pressing block 52, so that the arc-shaped hook 511 can avoid the clamping block 41 to be inserted, the clamping block 41 is inserted into the space between the pressing block 52 and the mounting groove 31, the worker loosens the pressing block 52, the fixed block 51 can move towards the clamping opening 42 of the clamping block 41 under the action of the torsion spring 53, the arc-shaped hook is arranged in the clamping opening 42, so that the clamping block 41 is fixed, two ends of the safety belt 4 can be arranged on the corresponding sliding blocks 3, and the worker can complete the fixing work with one hand through the arrangement of the pressing block 52, the worker, the safety of the replacement can be improved, the replacement efficiency can be improved, and the replacement efficiency can be improved.
Referring to fig. 8, 10 and 11, the inner wall of the bottom of the mounting groove 31 is further provided with a reset mechanism 6 for resetting the button;
the reset mechanism 6 comprises a support column 61, a connecting column 62, a first spring 63 and a limiting ring 64;
two support columns 61 are arranged, the two support columns 61 are horizontally arranged on the inner wall of the bottom of the mounting groove 31, and the two support columns 61 are arranged on two sides of the fixing block 51;
one end of each supporting column 61, which is far away from the inner wall of the bottom of the mounting groove 31, is provided with a first round hole 611, two first sliding grooves 612 are arranged in each first round hole 611, and the two first sliding grooves 612 are arranged in a mirror image manner relative to the axis of the first round hole 611;
two connecting columns 62 are provided, two first sliding strips 621 corresponding to the first sliding grooves 612 are arranged on the outer wall of one end of each connecting column 62, the connecting columns 62 can be slidably arranged in the corresponding first round holes 611, and the first sliding strips 621 can be slidably arranged in the corresponding first sliding grooves 612;
one ends of the two connecting columns 62 far away from the supporting column 61 are arranged on the inner wall of the rectangular avoiding opening 521 of the pressing block 52;
two first springs 63 are provided, the first springs 63 are arranged in the corresponding first round holes 611, and two ends of each first spring 63 respectively touch the inner wall of the bottom of the corresponding first round hole 611 and the corresponding connecting column 62;
the number of the limiting rings 64 is two, the two limiting rings 64 are disposed at one end of the supporting column 61 far away from the inner wall of the mounting groove 31, and the center of the limiting ring 64 is provided with a first through hole 641 for only the connecting column 62 to pass through.
When the staff promoted to press briquetting 52, press briquetting 52 and promote spliced pole 62, spliced pole 62 extrusion corresponds spring, when the staff loosens and presses briquetting 52, first spring 63 produces elastic force, it removes towards the direction of keeping away from mounting groove 31 bottom inner wall to promote spliced pole 62, spacing ring 64 can avoid spliced pole 62 to be released first round hole 611 by the elastic force of first spring 63, under the elastic force of first spring 63, promote to press briquetting 52 to reset, make it under the condition that does not promote to press briquetting 52, press briquetting 52 can remain throughout in the position that does not contact fixed block 51.
Referring to fig. 5 to 8, the sliding block 3 is further provided with a protection box 32 for protecting the pressing block 52, the shape of the protection box 32 is the same as that of the pressing block 52, the opening of the protection box 32 faces a direction away from the pressing block 52, and a sealing cover 33 is further hinged in the opening of the protection box 32.
When the installation belt needs to be fixed, a worker can operate the pressing block 52 by opening the sealing cover 33, and after the fixing is completed, the sealing cover 33 and the protection box 32 are arranged, so that the pressing block 52 is protected, the phenomenon that the pressing block 52 is mistakenly touched by the outside to cause the clamping block 41 to be loosened and the worker falls off the cross rod 11 is avoided,
referring to fig. 6, a first magnet 331 is disposed at one end of the sealing cover 33 away from the hinge, a second magnet 321 corresponding to the first magnet 331 is disposed on the protection box 32, and the first magnet 331 and the second magnet 321 attract each other.
The first magnet 331 and the second magnet 321 attract each other, so that the attraction between the sealing cover 33 and the protection box 32 is improved, the sealing cover 33 is prevented from being opened due to external factors, and the protection of the pressing block 52 is further improved.
As shown in fig. 5 to 12, a second circular hole 34 is further formed on one side of each sliding block 3 away from the U-shaped sliding rail 1, and the second circular hole 34 is located at one end away from the mounting groove 31;
a limiting mechanism 7 for fixing the sliding block 3 is arranged in each second round hole 34;
the limiting mechanism 7 comprises a rotating column 71, a limiting column 72, a second spring 73 and a steel rope 74;
an annular sliding groove 341 is formed in the top edge of the second circular hole 34 along the circumferential direction, an annular sliding block 711 is arranged on the rotating column 71, the annular sliding block 711 is slidably arranged in the annular sliding groove 341, the rotating column 71 extends into the second circular hole 34, and the diameter of the rotating column 71 is smaller than that of the second circular hole 34;
third circular holes 35 are formed in two sides of the sliding block 3 along the length direction of the U-shaped sliding rail 1, a second through hole 36 is formed in the inner wall of the bottom of each third circular hole 35, and the second through holes 36 are connected with the second circular holes 34;
a plurality of limiting holes 13 are arranged at two sides of each U-shaped slide rail 1 along the length direction, the limiting holes 13 are arranged at equal intervals along the length direction of the U-shaped slide rail 1,
the third round hole 35 and the axis of the limiting hole 13 are in the same horizontal plane;
the inner wall of each third round hole 35 is provided with two second sliding grooves 351, and the two second sliding grooves 351 are arranged in a mirror image mode relative to the axis of the third round hole 35;
two limiting columns 72 are provided, two second sliding strips 721 corresponding to the second sliding grooves 351 are arranged at one end of each limiting column 72, the limiting columns 72 can be slidably arranged in the corresponding third round holes 35, and the second sliding strips 721 can be slidably arranged in the corresponding second sliding grooves 351;
two second springs 73 are arranged, the two second springs 73 are arranged in the corresponding third circular holes 35, and two ends of each second spring 73 are respectively contacted with the corresponding limiting column 72 and the inner wall of the bottom of each third circular hole 35;
two steel ropes 74 are arranged, one end of each steel rope 74 is arranged at the center of one end, close to the corresponding third round hole 35, of the limiting column 72, and the other end of each steel rope 74 penetrates through the second through hole 36 to be connected with the outer wall of the rotating column 71;
a space for escaping the wire rope 74 is formed between the rotary post 71 and the inner wall of the second circular hole 34.
When in the process of climbing, the rotating column 71 rotates, the plurality of steel ropes 74 are driven to move, a space for avoiding the steel ropes 74 is formed between the rotating column 71 and the second round hole 34, so that the limiting column 72 moves along the axis direction of the second round hole 34, the second sliding strip 721 and the second sliding groove 351 are arranged, the stability of the limiting column 72 can be realized, the limiting column 72 extrudes the second spring 73, the second spring 73 generates elastic force, the limiting column 72 retracts into the second round hole 34, the influence on the sliding block 3 is avoided when the sliding block 3 is in the process, when a rest is needed, the rotating column 71 is rotated by a worker, the annular sliding block 711 slides along the annular sliding groove 341, the elastic force of the second spring 73 pushes the limiting column 72 to move towards the direction far away from the second round hole 34, the limiting columns 72 at two ends of the sliding block 3 are inserted into the corresponding limiting holes 13, so that the position of the sliding block 3 is fixed, the worker can rest, and the fatigue caused by long-time climbing is relieved.
As shown in fig. 2, 5, 6, 7 and 13, one end of the rotating column 71 away from the second circular hole 34 is further provided with a ratchet 712 along a circumferential direction, the ratchet 712 is located outside the sliding block 3, the sliding block 3 is further provided with a mounting box 8, the mounting box 8 is arranged in a vertical state, and an opening of the mounting box 8 faces a direction close to the rotating column 71;
a pawl 81 is hinged inside the mounting box 8, and one end, far away from the hinge, of the pawl 81 abuts against a ratchet 712;
a tension spring 82 is further arranged on one side of the pawl 81 close to the ratchet wheel 712, one end of the tension spring 82 far away from the pawl 81 is arranged in the mounting box 8, and the tension spring 82 pulls the abutting claw to move towards the direction close to the pawl 81.
When the rotating column 71 pulls the limiting column 72 to retract into the third round hole 35, then the tension spring 82 pulls the pawl 81, the collision claw contacts with the ratchet 712, so that the rotating column 71 cannot rotate, the rotating column 71 is fixed, when the limiting column 72 needs to extend, only the pawl 81 needs to be pulled, the collision claw moves towards the direction away from the ratchet 712, under the action of the second spring 73, the rotating column 71 rotates, the limiting column 72 extends into the corresponding limiting hole 13, and therefore the sliding block 3 is fixed.
Referring to fig. 5, 6, 7 and 12, a cylindrical protrusion 713 is disposed at a center of an end of the ratchet 712 far away from the second circular hole 34, a plurality of anti-slip strips 714 are disposed on an outer wall of the cylindrical protrusion 713, a length direction of the anti-slip strips 714 is the same as an axial direction of the cylindrical protrusion 713, and the anti-slip strips 714 are equidistantly disposed along a circumferential direction of the cylindrical protrusion 713.
Thereby through cylindrical protrusion 713 be convenient for the staff to rotate rotary column 71, through the setting of antislip strip 714 to improve staff's hand and cylindrical protrusion 713's frictional force, thereby can be more convenient rotate rotary column 71.
As shown in fig. 5 to 9, rectangular grooves 37 are provided at both ends of the sliding block 3, and the rectangular grooves 37 communicate with the second circular holes 34;
each rectangular groove 37 is provided with a limiting plate 371, and the center of the limiting plate 371 is provided with a third through hole 372 for the limiting column 72 to pass through.
Through being provided with limiting plate 371, avoid under the effect of second spring 73 elastic force, spacing post 72 is released second round hole 34 to third perforation 372 can carry out the secondary spacing to spacing post 72, thereby further stability of spacing post 72 of improvement.
Referring to fig. 1, 5 and 6, the two sides of one end of the sliding block 3 close to the U-shaped sliding rail 1 are further provided with a semicircular groove 38311, a plurality of rollers 381 are rotatably arranged in the semicircular groove 38311, the rollers 381 are equidistantly arranged along the length direction of the U-shaped sliding rail 1, and the rollers 381 are attached to the inner walls of the two sides of the bottom of the U-shaped sliding rail 1.
Through being provided with gyro wheel 381, a plurality of gyro wheels 381 slide along U-shaped slide rail 1 bottom both sides inner wall, and when sliding block 3 slided along U-shaped slide rail 1, gyro wheel 381 can assist sliding block 3's slip, reduces the frictional force between sliding block 3 and the U-shaped slide rail 1, makes sliding block 3 gliding process on U-shaped slide rail 1 more smooth and easy.
The above examples, which are intended to represent only one or more embodiments of the present invention, are described in greater detail and with greater particularity, and are not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An automatic locking device for a safety belt of a tower crane ladder stand is characterized by comprising a U-shaped sliding rail (1), a fixing mechanism (2), a sliding block (3) and a safety belt (4);
the number of the U-shaped sliding rails (1) is two, the two U-shaped sliding rails (1) are arranged in a vertical state, the two U-shaped sliding rails (1) are parallel to each other, a plurality of cross rods (11) are arranged between the two U-shaped sliding rails (1), the cross rods (11) are arranged in a horizontal state, and the cross rods (11) are arranged at equal intervals along the length direction of the U-shaped sliding rails (1);
the number of the fixing mechanisms (2) is multiple, the fixing mechanisms (2) are arranged between the two U-shaped sliding rails (1) at equal intervals, and each fixing mechanism (2) comprises a supporting frame (21) and a falling protector (22);
two ends of the supporting frame (21) are respectively arranged at one side of the corresponding U-shaped sliding rail (1) far away from the opening;
the number of the falling protectors (22) is two, the two falling protectors (22) are fixedly arranged at the center of the support frame (21) in a vertical state, a safety rope (221) capable of automatically retracting is arranged at the bottom of each falling protector (22), an inclined hole (12) for the installation rope to pass through is formed in one side, close to each other, of each U-shaped slide rail (1), and the safety rope (221) passes through the corresponding inclined hole (12) and extends downwards along the length direction of the U-shaped slide rail (1);
two sliding blocks (3) are arranged below each fixing mechanism (2), the two sliding blocks (3) can be arranged on the corresponding U-shaped sliding rails (1) in a sliding mode, and one end, far away from the falling protector (22), of each safety rope (221) is arranged at the center of one end, close to the falling protector (22), of the corresponding sliding block (3);
one side of each sliding block (3) far away from the U-shaped sliding rail (1) is provided with a mounting groove (31), the mounting groove (31) is arranged at one end of each sliding block (3) close to the mounting rope, and a locking mechanism (5) is arranged in each mounting groove (31);
clamping blocks (41) are arranged at two ends of the safety belt (4), and clamping interfaces (42) are arranged on the clamping blocks (41);
locking mechanism (5) are including can rotating fixed block (51) of setting in mounting groove (31), and the one end of fixed block (51) is provided with and is used for colluding claw (511) with the fixed arc of joint piece (41).
2. The automatic locking device for the safety belt of the ladder stand of the tower crane as claimed in claim 1, wherein the locking mechanism (5) further comprises a pressing block (52) and a torsion spring (53);
the inner wall of one side, far away from the installation rope, of the installation groove (31) can be slidably arranged on the pressing block (52), and a space for placing the clamping block (41) is formed between one side, facing the installation rope, of the pressing block (52) and the installation groove (31);
the fixing block (51) is V-shaped, rotating shafts (512) are arranged on two sides of the corners of the fixing block (51), circular grooves (311) are formed in the mounting groove (31) along the inner walls of two sides of the U-shaped sliding rail (1) in the length direction, the rotating shafts (512) can be rotatably arranged in the corresponding circular grooves (311), the arc-shaped hook claws (511) face the direction far away from the pressing block (52), and one ends, far away from the arc-shaped hook claws (511), of the fixing block (51) are arranged between the pressing block (52) and the inner wall of the bottom of the mounting groove (31);
two torsion springs (53) are arranged, the torsion springs (53) are arranged on the corresponding rotating shafts (512), the inner walls of two sides of the mounting groove (31) along the length direction of the U-shaped sliding rail (1) are provided with limiting blocks (312) for fixing the torsion springs (53), one ends of the torsion springs (53) are in contact with the corresponding limiting blocks (312), and the other ends of the torsion springs (53) are arranged in the depressions of the fixing blocks (51);
one side of the pressing block (52) close to the fixed block (51) is provided with a rectangular avoidance opening (521) for avoiding the fixed block (51).
3. The automatic locking device for the safety belt of the ladder stand of the tower crane as claimed in claim 2, wherein a reset mechanism (6) for resetting the button is further arranged on the inner wall of the bottom of the mounting groove (31);
the reset mechanism (6) comprises a support column (61), a connecting column (62), a first spring (63) and a limiting ring (64);
two support columns (61) are arranged, the two support columns (61) are horizontally arranged on the inner wall of the bottom of the mounting groove (31), and the two support columns (61) are arranged on two sides of the fixing block (51);
one end, far away from the inner wall of the bottom of the mounting groove (31), of each supporting column (61) is provided with a first round hole (611), two first sliding grooves (612) are formed in each first round hole (611), and the two first sliding grooves (612) are arranged in a mirror image mode relative to the axis of the first round hole (611);
the number of the connecting columns (62) is two, two first sliding strips (621) corresponding to the first sliding grooves (612) are arranged on the outer wall of one end of each connecting column (62), the connecting columns (62) can be arranged in the corresponding first round holes (611) in a sliding mode, and the first sliding strips (621) can be arranged in the corresponding first sliding grooves (612) in a sliding mode;
one ends of the two connecting columns (62) far away from the supporting column (61) are arranged on the inner wall of a rectangular avoiding opening (521) of the pressing block (52);
two first springs (63) are arranged, the first springs (63) are arranged in the corresponding first round holes (611), and two ends of each first spring (63) respectively touch the inner wall of the bottom of the corresponding first round hole (611) and the corresponding connecting column (62);
the limiting rings (64) are two, the two limiting rings (64) are arranged at one end, far away from the inner wall of the mounting groove (31), of the supporting column (61), and a first through hole (641) only allowing the connecting column (62) to penetrate is formed in the center of each limiting ring (64).
4. The automatic locking device for the safety belt of the ladder of the tower crane as claimed in claim 3, wherein the sliding block (3) is further provided with a protection box (32) for protecting the pressing block (52), the protection box (32) is the same as the pressing block (52) in shape, the opening of the protection box (32) faces the direction away from the pressing block (52), and a sealing cover (33) is hinged in the opening of the protection box (32).
5. The automatic locking device for the safety belt of the ladder stand of the tower crane as claimed in claim 4, wherein one end, away from the hinge joint, of the sealing cover (33) is provided with a first magnet (331), the protection box (32) is provided with a second magnet (321) corresponding to the first magnet (331), and the first magnet (331) and the second magnet (321) attract each other.
6. The automatic locking device for the safety belt of the ladder stand of the tower crane as claimed in claim 1, wherein a second round hole (34) is further formed in one side, away from the U-shaped sliding rail (1), of each sliding block (3), and the second round hole (34) is located at one end, away from the mounting groove (31);
a limiting mechanism (7) used for fixing the sliding block (3) is arranged in each second round hole (34);
the limiting mechanism (7) comprises a rotating column (71), a limiting column (72), a second spring (73) and a steel rope (74);
an annular sliding groove (341) is formed in the edge of the top of the second round hole (34) in the circumferential direction, an annular sliding block (711) is arranged on the rotating column (71), the annular sliding block (711) is arranged in the annular sliding groove (341) in a sliding mode, the rotating column (71) extends into the second round hole (34), and the diameter of the rotating column (71) is smaller than that of the second round hole (34);
third round holes (35) are formed in the two sides of the sliding block (3) along the length direction of the U-shaped sliding rail (1), a second through hole (36) is formed in the inner wall of the bottom of each third round hole (35), and the second through holes (36) are connected with the second round holes (34);
a plurality of limiting holes (13) are arranged at two sides of each U-shaped sliding rail (1) along the length direction, the limiting holes (13) are arranged at equal intervals along the length direction of the U-shaped sliding rail (1),
the third round hole (35) and the axis of the limiting hole (13) are in the same horizontal plane;
the inner wall of each third round hole (35) is provided with two second sliding grooves (351), and the two second sliding grooves (351) are arranged in a mirror image mode relative to the axis of the third round hole (35);
two limiting columns (72) are provided, two second sliding strips (721) corresponding to the second sliding grooves (351) are arranged at one end of each limiting column (72), the limiting columns (72) can be arranged in the corresponding third round holes (35) in a sliding mode, and the second sliding strips (721) can be arranged in the corresponding second sliding grooves (351) in a sliding mode;
two second springs (73) are arranged in the corresponding third round holes (35), and two ends of each second spring (73) are respectively contacted with the corresponding limiting column (72) and the inner wall of the bottom of each third round hole (35);
two steel ropes (74) are arranged, one end of each steel rope (74) is arranged at the center of one end, close to the corresponding third round hole (35), of the limiting column (72), and the other end of each steel rope (74) penetrates through the second through hole (36) to be connected with the outer wall of the corresponding rotating column (71);
a space for avoiding the steel rope (74) is formed between the rotating column (71) and the inner wall of the second round hole (34).
7. The automatic locking device for the safety belt of the ladder stand of the tower crane as claimed in claim 6, wherein a ratchet (712) is further arranged at one end, away from the second round hole (34), of the rotating column (71) along the circumferential direction, the ratchet (712) is positioned outside the sliding block (3), a mounting box (8) is further arranged on the sliding block (3), the mounting box (8) is arranged in a vertical state, and an opening of the mounting box (8) faces to a direction close to the rotating column (71);
a pawl (81) is hinged inside the mounting box (8), and one end, far away from the hinge, of the pawl (81) abuts against the ratchet (712);
one side of the pawl (81) close to the ratchet wheel (712) is further provided with a tension spring (82), one end, far away from the pawl (81), of the tension spring (82) is arranged in the mounting box (8), and the tension spring (82) pulls the abutting claw to move towards the direction close to the pawl (81).
8. The automatic locking device of the safety belt of the tower crane crawling ladder according to claim 7, wherein a cylindrical protrusion (713) is arranged at the center of one end, away from the second round hole (34), of the ratchet wheel (712), a plurality of anti-slip strips (714) are arranged on the outer wall of the cylindrical protrusion (713), the length direction of the anti-slip strips (714) is the same as the axial direction of the cylindrical protrusion (713), and the anti-slip strips (714) are arranged equidistantly along the circumferential direction of the cylindrical protrusion (713).
9. The automatic locking device for the safety belt of the ladder stand of the tower crane as claimed in claim 6, wherein rectangular grooves (37) are formed at two ends of the sliding block (3), and the rectangular grooves (37) are communicated with the second round hole (34);
each rectangular groove (37) is internally provided with a limiting plate (371), and the center of each limiting plate (371) is provided with a third through hole (372) for the limiting column (72) to pass through.
10. The automatic locking device for the safety belt of the ladder stand of the tower crane as claimed in claim 1, wherein semicircular grooves (38) (311) are further formed in two sides of one end, close to the U-shaped sliding rail (1), of the sliding block (3), a plurality of rollers (381) are rotatably arranged in the semicircular grooves (38) (311), the rollers (381) are equidistantly arranged along the length direction of the U-shaped sliding rail (1), and the rollers (381) are attached to inner walls of two sides of the bottom of the U-shaped sliding rail (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211110583.4A CN115624699B (en) | 2022-09-13 | 2022-09-13 | Automatic locking device for safety belt of tower crane cat ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211110583.4A CN115624699B (en) | 2022-09-13 | 2022-09-13 | Automatic locking device for safety belt of tower crane cat ladder |
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| Publication Number | Publication Date |
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| CN115624699A true CN115624699A (en) | 2023-01-20 |
| CN115624699B CN115624699B (en) | 2023-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211110583.4A Active CN115624699B (en) | 2022-09-13 | 2022-09-13 | Automatic locking device for safety belt of tower crane cat ladder |
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| CN (1) | CN115624699B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4130177A (en) * | 1977-07-15 | 1978-12-19 | Pandolph James E | Ladder climber's safety device |
| CN209778126U (en) * | 2019-04-23 | 2019-12-13 | 湖北亿涛建设有限公司 | Anti-falling straight ladder for tower crane climbing |
| CN211050766U (en) * | 2019-11-19 | 2020-07-21 | 广东电网有限责任公司东莞供电局 | Be applied to safe saddle of climbing of electric power distribution network construction |
| CN213062887U (en) * | 2020-08-05 | 2021-04-27 | 中铁十七局集团第二工程有限公司 | Civil engineering construction support protection device |
| CN112849072A (en) * | 2021-03-29 | 2021-05-28 | 台州科技职业学院 | Safety belt wearing monitoring system |
| CN215585294U (en) * | 2021-09-06 | 2022-01-21 | 北京紫竹慧建设服务股份有限公司 | Climbing anti-falling device |
| CN216258788U (en) * | 2021-04-29 | 2022-04-12 | 山西建筑工程集团有限公司 | Portable tower crane driver climbing auxiliary anti-falling device |
| CN217408004U (en) * | 2022-04-01 | 2022-09-13 | 常州市东晨车辆部件有限公司 | Foreign matter prevention safety belt lock catch |
-
2022
- 2022-09-13 CN CN202211110583.4A patent/CN115624699B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4130177A (en) * | 1977-07-15 | 1978-12-19 | Pandolph James E | Ladder climber's safety device |
| CN209778126U (en) * | 2019-04-23 | 2019-12-13 | 湖北亿涛建设有限公司 | Anti-falling straight ladder for tower crane climbing |
| CN211050766U (en) * | 2019-11-19 | 2020-07-21 | 广东电网有限责任公司东莞供电局 | Be applied to safe saddle of climbing of electric power distribution network construction |
| CN213062887U (en) * | 2020-08-05 | 2021-04-27 | 中铁十七局集团第二工程有限公司 | Civil engineering construction support protection device |
| CN112849072A (en) * | 2021-03-29 | 2021-05-28 | 台州科技职业学院 | Safety belt wearing monitoring system |
| CN216258788U (en) * | 2021-04-29 | 2022-04-12 | 山西建筑工程集团有限公司 | Portable tower crane driver climbing auxiliary anti-falling device |
| CN215585294U (en) * | 2021-09-06 | 2022-01-21 | 北京紫竹慧建设服务股份有限公司 | Climbing anti-falling device |
| CN217408004U (en) * | 2022-04-01 | 2022-09-13 | 常州市东晨车辆部件有限公司 | Foreign matter prevention safety belt lock catch |
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| CN115624699B (en) | 2023-07-25 |
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