CN2136049Y - Safety fall arrest device for working at heights - Google Patents

Abstract

A safety anti-falling device for high-altitude operation is characterized in that a cable winding wheel is pivoted in a shell seat, a main rope is wound on the cable winding wheel, a spring is arranged in a concave chamber on one side of the cable winding wheel to enable the cable winding wheel to automatically rewind, and an automatic locking mechanism is arranged in a concave chamber on the other side of the cable winding wheel and comprises: the rope winding device comprises a main ratchet wheel fixedly arranged on a rope winding wheel, a small buckling claw pivoted on the end face of the ratchet wheel, a driving ring pivoted on a ratchet wheel shaft collar, a linkage ring seat, a clamping block and the like, wherein the linkage ring seat is pivoted and sleeved on the periphery of the driving ring, the inner periphery of the ring part is provided with annular convex teeth, and the clamping block is pivoted on a shell seat corresponding to the ratchet wheel. The utility model discloses compromise the requirement of sensitivity and fastness, convenient to use, safe and reliable.

Description

The utility model relates to an anti-falling device, especially an anti-falling device that can be provided for workers working at high places to hang and use, so that they can avoid casualties caused by falling on the ground when they accidentally slip, and can immediately prevent the fall caused by the fall. The staff hanging in the air unloaded to facilitate first aid work.

At present, when working at high places such as high-rise buildings, construction of steel-frame houses, cleaning of the appearance of high-rise buildings, painting, etc., the staff are usually in a dangerous state without safety barriers around them, so if they accidentally make mistakes during the operation Any fall will cause serious bodily injury. It is common to hear incidents like this kind of work at heights, where people fall due to carelessness, resulting in casualties! How to prevent the recurrence of such tragic incidents, it is not enough to rely on the caution of operators, so it is necessary to develop anti-falling devices for the safety needs of such high-altitude operations.

The anti-falling device used in high places in the early days is quite simple. It just fixes a clasp at both ends of a predetermined length of rope. On a solid fixed object near the workplace, in case the operator accidentally slips and falls, the human body can be pulled by the rope to avoid injury caused by falling to the ground; but this simple design is only suitable for fixing in the workplace, and In occasions where the range of activities is small, if the operation must be performed within a large range (such as building a building), it cannot be applied. In addition, the device would hang a worker in mid-air if he lost his footing, so he had to be picked up quickly. However, for this kind of rope device, it is very troublesome to rescue the suspended staff safely and quickly. Usually, two or three people are required to work together to pull the suspended staff in mid-air from a high workplace. At the same time, this kind of rescue work is not only laborious but also dangerous, so the practicability of this kind of rope device is quite limited.

Another improved anti-dropping device is mainly provided with a resistance ring and a vane wheel in the cylinder body. The inner wall of the resistance ring is provided with two blocking blocks, and the vane wheel is provided with four protruding arms. The front end of the blade is a wedge-shaped notch that can be engaged with the blocking block of the resistance ring, and a cable coil is set on the protruding rotating shaft of the blade wheel, and a spring is set on the end of the rotating shaft to make the rotating shaft automatically rotate; , The rope can be tied to the staff. When the human body accidentally falls, the rope can be pulled by gravity to accelerate the rotation of the blade wheel, and the centrifugal force is used to throw the blade out and fix it with the blocking block to achieve the anti-fall effect.

Although this design is more practical than the above-mentioned previous ropes, there are still design shortcomings, that is: the protruding effect of the blade has no direction restriction, and it will protrude and block with the blocking block no matter it is forward rotation or reverse rotation. As a result, when the rope is retracted in reverse, unnecessary jamming occurs, and the rope cannot be automatically retracted. Therefore, when the rope is retracted, the speed of the rope must be specially controlled to make it slowly retracted, so that it is natural in use. It is inconvenient; moreover, its locking structure is formed by the retractable blades in the protruding arm and two blocking blocks. When the staff falls and pulls the rope, these protruding arms and blades will rotate rapidly, and the high-speed rotation The protruding blades under the action of centrifugal force will quickly hit the blocking block, resulting in locking and anti-dropping effects. In addition, the design of the blade installation is a long cantilever with less rigidity, so it is easy to bend and deform after several impacts Or broken, so that the sensitivity is affected, the safety is naturally worrying! In addition, this device will also cause the staff who lost their feet to be suspended in mid-air and must be rescued quickly; but this device is also quite cumbersome and inconvenient to handle because it has no unloading design.

Therefore, the main purpose of the present utility model is to provide a safety anti-drop device for working at heights, which is more convenient and safe to use.

The second purpose of this utility model is to provide a safety anti-falling device for working at heights, which is additionally provided with an unloading mechanism, which can promptly unload the staff who are suspended from a height after falling, so as to facilitate Perform first aid.

The purpose of this utility model is achieved in the following manner:

A safety anti-drop device for working at heights, which mainly includes:

Shell seat, the top of which is fixed with a shackle;

The cable winding wheel is pivotally arranged in the middle of the above-mentioned shell seat freely rotatable, and a main rope is fixed and wound between the rings on both sides. Each is formed with an alcove;

The retracting spring is accommodated in the alcove on one side of the coiling wheel, one end of which is fixed, and the other end is connected to the coiling wheel; the utility model also includes

The automatic locking mechanism includes: a main ratchet, a small claw, a drive ring, a linkage ring seat, and a clamping block, etc.; the main ratchet is fixed in the alcove on the other side of the cable pulley, and the small claw is pivotally mounted on the main ratchet. On the end face of the ratchet, there is a drive pin protruding thereon; the drive ring is pivotally mounted on the collar of the main ratchet, which can rotate freely within a certain angle, and a return spring is arranged between it and the main ratchet. There is a driving groove, and the driving pin of the small buckle is accommodated in it; the movable ring seat is pivotally sleeved on the outer circumference of the driving ring, and a push-in receiving groove is protruded on it, and the side of the pushing-in receiving groove There is a shrapnel protruding from the side to make the interlocking ring seat automatically rotate. The inner peripheral edge of the interlocking ring seat is provided with annular protruding teeth; The push-in groove of the interlocking ring seat.

In this way, when the worker falls, due to the acceleration of gravity pulling the winding wheel and the main ratchet, the driving wheel will rotate relative to the main ratchet due to inertia, so as to push the small claw to buckle on the protruding teeth of the linkage ring seat , let the interlocking ring seat rotate, and then push it against the slot, that is, push the clamping block against the ratchet, and finally lock and fix the coiling wheel, so that the main rope can catch the falling person in time to avoid falling to the ground .

The utility model can also include a lifter, which is mainly provided with a reel pivotally in a shell chamber, a worm wheel is fixed on the reel shaft, a worm is engaged on the worm wheel, and a rotating rod is provided on the shaft of the worm. , and on the reel, there is fixedly wound a unloading rope, the outer end of the unloading rope is fixed with a hook, which is fastened to the shackle of the above-mentioned shell seat when in use, and the top of the shell chamber is fixed with a hook body, so that the hook is on the solid fixed object in the workplace. If the operator accidentally falls and falls and is suspended in mid-air by the above-mentioned main rope, the rotating rod can be pulled in time to rotate the reel and release the unloading. Descending the rope and unloading the staff for first aid work.

The end of the shrapnel of the interlocking ring seat of the automatic locking mechanism can form a fixed ring, which is fixed on the shell seat by a pillar, and an elastic arm is protruding from the fixed ring, and the end of the clamping block It is pivotally arranged on the pillar, and its end surface bears against the elastic arm of the linkage ring seat.

In order to achieve the above-mentioned purpose, the technical means and effects thereof adopted by the present utility model are now given a preferred embodiment and explained as follows in conjunction with the drawings.

A brief description of the schema:

Fig. 1 is the schematic diagram of the device of the embodiment of the utility model.

Fig. 2 is a cross-sectional view of 2'-2' section line in Fig. 1; it shows the device situation of the automatic locking mechanism.

Fig. 3 is a cross-sectional view of 3'-3' section line in Fig. 1; it shows the device situation of the small claw of the automatic locking mechanism.

Fig. 4 is a sectional view of section line 4'-4' in Fig. 1; showing the internal device of the automatic locking mechanism.

Fig. 5 is a sectional view of section line 5'-5' in Fig. 1; it shows the internal device situation of the unloading device.

Fig. 6 is a schematic diagram of the structure of the fixing belt of the embodiment of the present invention.

Fig. 7 is a schematic diagram of the state of the automatic locking mechanism of the embodiment of the present invention in normal operation.

Fig. 8 is a schematic diagram of the action of the automatic locking mechanism of the embodiment of the present invention.

Please refer to Figures 1 and 2: the anti-falling device of the embodiment of the utility model mainly includes a shell seat 1, a coiling wheel 2, a retracting spring 3, an automatic locking mechanism 4, a release device 5, and a fixing belt 6; among them ,

The shell seat 1 is slightly inverted U-shaped, and its top is fixed with a shackle 11, so that the hook can be placed on the clasp 561 at the bottom of the unloader 5, or on a firm fixture in the workplace; Invert the middle of the U-shaped shell base 1, and use the main shaft 21 to pivot it on both sides of the shell base 1, so that the cable pulley 2 can rotate freely on the shell base 1, and an annular groove 23 is formed between the rings 22 on both sides A helical guide groove 24 is opened on the bottom ring surface of the container groove 23 for guiding the main rope 25 wound on the rope reel 2, and an alcove 26, 27 is formed at the axial ends of the rings 22 on both sides. ; wherein the outer end of the main rope 25 is fixed with a clasp 251, which can be used for hooking on the fixing belt 6 worn on the staff (as shown in Figure 6).

The retracting spring 3 is a volute spring, which is arranged in the alcove 26 on one side of the coiling wheel 2, and its inner end is fixed on the main shaft 21, and the other end is connected to the coiling wheel 21, so that the coiling wheel 2 can automatically return. roll.

Please refer to Fig. 2, 3, 4 again: the automatic locking mechanism 4 mainly includes: main ratchet 41, small buckle 42, driving ring 43, interlocking ring seat 44 and clamping block 45 etc.: wherein, main ratchet 41 is It is fixed (or integrally formed) in the alcove 27 on the other side of the cable wheel 2 (as shown in Figure 1); the end of the small claw 42 is pivoted on the ratchet 2 by the pillar 421 embedded in the end surface of the main ratchet 41. The outside of the front end is convexly provided with a buckle 422, while the two sides of the inner side are respectively convexly provided with a drive pin 423, and the drive pin 423 on the bottom is accommodated in the guide groove 411 on the main ratchet 41 to limit the action arc of the small claw 42 (such as Fig. 1, 3); The drive ring 43 is pivotally arranged on the collar of the main ratchet 41 and can rotate freely within a certain angle, and a return spring 431 is provided between it and the pillar 421, and a drive groove 432 is provided, and a small buckle The driving pin 423 of the pawl 42 is accommodated therein. When the winding wheel 2 is pulled to accelerate the rotation, the driving ring 43 and the main ratchet 41 can be relatively rotated by the action of inertial force, and the driving groove 432 can be used to push The driving pin 423 drives the buckle 422 to move outward; the interlocking ring seat 44 is movably pivoted on the main shaft 21, and its ring portion 441 is pivotally sleeved on the outer periphery of the driving ring 43 at the same time, and its ring portion 441 is protruding outward with a push-button The storage tank 442 pushes against the side of the storage tank 442 and protrudes with a shrapnel 443. The end of the shrapnel 443 forms a fixed ring 444, which is fixed on the shell base 1 by a pillar 445, so that the interlocking ring base 44 can automatically rotate; The ring 444 is extended with an elastic arm 446, and the inner periphery of the ring part 441 is provided with an annular protruding tooth 447. When the buckle part 422 of the small claw 42 is driven to move outward, it can be buckled on the annular protruding tooth 447. , and drive the entire interlocking ring seat 44 to rotate; the end of the clamping block 45 is pivotally arranged on the above-mentioned pillar 445, and is accommodated in the pushing-in groove 442 of the interlocking ring seat 44, and its front end corresponds to the main ratchet 41. The protruding tooth is formed with a locking protrusion 451, the end of which bears against the spring arm 446 of the interlocking ring seat 44. When the interlocking ring seat 44 is driven to rotate, it can be pushed against the holding groove 442 to push the locking block 45 Move, so that the clamping protrusion 451 is fixedly embedded on the main ratchet 41 to lock the cable pulley 2 .

Please refer to Figs. 1 and 5 again: the unloading device 5 is mainly provided with a reel 52 pivotally in the shell chamber 51, and a worm wheel 53 is fixed on the reel shaft, and a worm 54 is engaged on the worm wheel 53, and the shaft portion of the worm 54 Outward extension is provided with rotating rod 55, and is fixedly installed on the reel 52 and is wound with a unloading drop rope 56, and the outer end of unloading drop rope 56 is fixedly provided with clasp 561, buckles and connects on aforementioned housing base 1 during use. On the shackle 11 of the shackle 11, and the top of the housing chamber 51 is fixed with a hook body 511, so that the hook is on a solid fixture in the workplace, so when the operator accidentally falls and falls, he is pulled by the main rope 25 and hangs in mid-air During middle time, just can pull rotating bar 55 in time and make reel 52 rotate and release unloading drop rope 56, can unload the staff member who stumbles quickly and easily like this and carry out emergency work in time; Wherein, rely on worm wheel 53 and worm screw 54 Due to the high reduction ratio and the self-locking characteristic of irreversible transmission, the unloading and lowering rope 56 will not automatically release the rope when it is loaded, so it is safe and more convenient to use.

Please refer to Figure 6: In order to achieve more firmness and safety in use of the embodiment of the utility model, and less hinder the movement of the staff's limbs, there is a special design of the fixing belt 6, which is mainly adjustable in length and can be buckled. The chest belt 61 and the waist belt 61, two connecting shoulder straps 63 connected between the chest belt 61 and the waist belt 62 front and back, and the buckle 64 located in the middle of the chest belt 61 back are formed; when in use, the chest belt 61 is wrapped On the chest, the waist belt 62 is buckled at the waist, and the connecting shoulder strap 63 is worn on the shoulder, so that the whole human body can be fastened firmly, and finally the clasp 251 of the main rope 25 is hooked on the clasp 64; The main rope 25 is tied to the back of the human body, so it will not hinder the work, and it is more convenient to use.

Please refer to Fig. 1, 7 again: when the embodiment of the utility model is in the normal use state, because the staff walks around in the workplace, because the walking speed is slow (the acceleration is also small), so the driving ring 43 of the automatic locking mechanism 4 is not enough The inertial force pushes the drive ring 43 to rotate relative to the main ratchet 41, so the small claw 42 remains in a retracted state, so that the coiling wheel 2, the drive ring 43 and the small claw 42 are rotated synchronously. Receive the effect of spring 3, main rope 25 will be able to do free expansion and contraction along with the walking of staff.

Please refer to Fig. 1 and 8 again: when the staff accidentally stumbles and falls from a high place during the operation, since the acceleration of gravity acts on the main rope 25 immediately, the rope winding wheel 2 and the main ratchet 41 will all be affected by the acceleration of gravity And speed up the rotation, at this time, the drive ring 43 cannot rotate with the main ratchet 41 in time due to the effect of inertial force, so a relative rotation will be produced between the main ratchet 41, so that the drive groove 432 pushes the drive pin 423 to move outwards, and then makes the drive ring 43 move outwards. The small claw 42 is fastened on the protruding tooth 447 of the interlocking ring seat 44, and the interlocking ring seat 44 is rotated, and then pushed against the receiving groove 442, that is, the locking block 45 is pushed against the main ratchet 41, and finally the When the coiling wheel 2 is locked and fixed, the main rope 25 can pull the fallen personnel in time to avoid falling to the ground; at this time, other workers only need to rotate the rotating rod 55 of the unloading device 5 to slowly release the unloading rope 56. out, then the staff who are suspended at a high place by the main rope 25 can be unloaded in time, so as to carry out first aid work.

It can be seen from the above description that the utility model has the following advantages different from the previous anti-falling devices:

(1) The action of the automatic locking mechanism is limited by direction, and it works only when it is turned forward, and it will not be locked when it is reversed to take in the rope, so the design is more reasonable and the use is more convenient.

(2) The inertial force is used as the driving force of self-locking, and another clamping block with a stronger structure is used to block the main ratchet to bear the gravity, so that the driving structure is separated from the load-bearing structure, so that both sensitivity and firmness can be considered dual security requirements.

(3) With the design of unloader, it is safer and more convenient to use.

In view of the above, the anti-falling device provided by the utility model is indeed an unprecedented innovation among similar products, and can achieve the expected creation and improvement purposes.

Claims (3)

1, the safe anti-fall device of a kind of high-rise working, it mainly comprises:

Shell block, its top is installed with shackle;

The volume cable pulley, free to rotate is hubbed in the middle of the above-mentioned shell block, and its both sides interannular sets firmly and is wound with a main rope, and its outer end is installed with clasp, and the end, axle center of its two side ring respectively is formed with alcove;

Furl spring, be located in the alcove of volume cable pulley one side, the one end is fixed, and his end is connected on the volume cable pulley; Of the present utility model being characterised in that: it also includes

Automatically locked mechanism comprises: main ratchet, little button pawl, driving ring, interlock ring seat and clamping block etc.; Wherein, main ratchet is installed in other the side alcove of volume cable pulley, and little button pawl pivot is located on this main ratchet end face, convexes with drive pin on it; Described driving ring is to be hubbed on freely to rotate in certain angle on the axle collar of this main ratchet, is provided with backspring on it and between main ratchet, and offers driver slot, and the drive pin of little button pawl is to be contained in wherein; Described interlock ring seat activity pivot is placed on the periphery of driving ring, convexes with the pushing and pressing tank on it, and the side of this pushing and pressing tank is other to have protruded out and make the interlock ring seat can automatic rotating shell fragment, and the ring portion inner peripheral of this interlock ring seat is provided with annular double wedge; The corresponding main ratchet of clamping block and being hubbed on the described shell block, and be located in the pushing and pressing tank of described interlock ring seat.

2, by the safe anti-fall device of the described high-rise working of claim 1, it is characterized in that: it also includes to unload and falls device, mainly be at the indoor rolling wheel that is pivoted with of shell, be installed with worm gear on this rolling wheel axle, bridle joint has worm screw on the worm gear, the axial region of worm screw stretches out and is provided with bull stick, and on rolling wheel, set firmly and be wound with one and unload and fall rope, unload the outer end that falls rope and be installed with clasp, link on the shackle of above-mentioned shell block, and top, shell chamber is installed with coupler body, and suspension hook is on the firm fixture in operation place.

3, by claim 1 or the safe anti-fall device of 2 described high-rise workings, it is characterized in that: the shell fragment end of the interlock ring seat of described automatic locked mechanism is formed with retainer ring, and the mat pillar is fixedly arranged on the shell block, also extend on the retainer ring and convex with elastic arm, and the end of described clamping block is hubbed on the pillar, and its terminal surface also holds on the elastic arm that is butted on described interlock ring seat.

Images