1600 results about "Suspender belt" patented technology

A sling for use with a ballistic shield, wherein the sling may be fastened with a release buckle and tightened. Excess strap may be secured in a glide buckle and can be trimmed to fit. An optional security webbing loop adds stability against strap sliding. Ambidextrous buckles near the handle grip allow versatile connection and use. The shoulder strap hooks onto the lower strap, enhancing stability.

The invention discloses a hoisting tool for a steam turbine rotor, and belongs to the technical field of hoisting equipment, the hoisting tool for the steam turbine rotor comprises a cross beam and two groups of hoisting frames, the two groups of hoisting frames are symmetrically arranged on two sides of the cross beam, the hoisting frames are slidably connected to the cross beam, and hoisting parts are connected below the hoisting frames. Longitudinal beams are symmetrically and fixedly connected to the two ends of the cross beam, adjusting components are slidably connected to the tops of the longitudinal beams, auxiliary mooring ropes are hung at the bottoms of the longitudinal beams, and traction ropes are arranged at the tops of the longitudinal beams. The lifting belt is used for lifting the steam turbine rotor, compared with cable lifting, the lifting belt is more stable, stress of the lifting belt can be adjusted, accidents caused by uneven stress are avoided, meanwhile, the cable is assisted to lift the steam turbine rotor together, it is guaranteed that the steam turbine rotor is stably lifted, the steam turbine rotor is prevented from falling off when the lifting belt breaks down, and serious accidents are avoided.

The invention discloses a unit type curved surface curtain wall installation device and method, and relates to the technical field of curtain wall construction, and the unit type curved surface curtain wall installation device comprises a plurality of detection units which are respectively installed on each control point on a unit structure body and are used for detecting actual measurement coordinates of the corresponding control points; the fine adjustment mechanism is connected to the lower end of the hoisting belt of the crane and is used for finely adjusting the position of the unit structure body; the control module is electrically connected to the detection unit and the fine adjustment mechanism; wherein the control module is configured to obtain actual measurement coordinates of each control point fed back by the detection unit; comparing the actually measured coordinates of each control point with pre-stored theoretical coordinates in a BIM model to obtain a deviation value of each control point; performing overall pose analysis based on the deviation value to obtain a pose deviation of the unit structure body in the space; generating a movement control quantity corresponding to each control point based on the pose deviation; and sending a movement control instruction to the fine adjustment mechanism according to the movement control quantity. The installation method has the effect of improving the installation efficiency.

The invention discloses a high-pier large-span extra-large bridge suspended pouring beam hanging basket construction method, and belongs to the field of bridge engineering construction.The method comprises the following steps that hanging basket rails are installed, the precision is controlled, and a hanging basket comprising a double-channel-steel main truss, a manganese steel sling, an arc-shaped flow guide plate and a honeycomb formwork is assembled; grading pre-pressing is carried out according to the specified multiple of the design load, and the pre-camber of the template is corrected by adopting a BP neural network to ensure that the finished bridge linear error meets the requirement; a mechanical-hydraulic-electrical integrated intelligent control system is deployed, and the traveling speed and synchronism of the hanging basket are controlled through double-oil-cylinder driving, a 5G digital twin platform and an edge computing technology, so that rapid alarm is realized when the load is abnormal; segmental circulation construction is carried out, and when the environment wind speed reaches a set value, a hydraulic rail clamping device is automatically locked; a model is established by using ANSYS software, and simulation verification is performed on multiple types of key working conditions to ensure that the safety coefficient of the structure meets the specification requirement. The construction precision and safety are guaranteed, and the method adapts to complex environments.

The invention relates to the technical field of substations, and particularly discloses a box-type substation for new energy, which comprises a box-type substation, a plurality of fixing mechanisms for placing slings are mounted on two sides of the bottom of the box-type substation, and pushing mechanisms are arranged on the fixing mechanisms to push the slings out of the fixing mechanisms. The fixing mechanism comprises a hanging assembly installed on the box-type substation, a pressed assembly slidably arranged on the lower portion of the interior of the hanging assembly and a movable part slidably arranged on the upper portion of the interior of the hanging assembly, and the pressed assembly can jack up the movable part. According to the box-type transformer substation for the new energy, after the box-type transformer substation falls to the ground, the pressed assembly starts to reset and drives the movable part to reset due to extrusion of the hanging belt, the sliding cylinder starts to reset and pushes the hanging belt out of the hanging assembly due to blocking of the movable part, the hanging belt is automatically pushed out, and workers do not need to take down the hanging belt from each hanging point; therefore, the dismounting efficiency of the sling is improved, and the mounting effect of the box-type substation is improved.

The invention discloses a deformation monitoring and early warning device of an insulating soft sling based on sensor monitoring, which comprises a soft quality inspection sling, a flexible sensor module and a connector, and is characterized in that the flexible sensor module is arranged on one side of the soft quality inspection sling; the flexible sensor module comprises a first detection fiber bragg grating, a second detection fiber bragg grating, a composite coating, an insulating sleeve, reinforcing ribs, a glue storage groove and a protective mounting sleeve, and the reinforcing ribs are arranged on the upper and lower sides of the first detection fiber bragg grating and the second detection fiber bragg grating. According to the deformation monitoring and early warning device for the insulating soft sling based on sensor monitoring, a first detection fiber bragg grating and a second detection fiber bragg grating are used for detecting the deformation quantity generated when the soft sling works, and the detected data are uploaded to system terminal equipment through a mediator; in other words, a worker can check the working state of the soft quality repair sling through the system terminal device, and the intelligent level of the soft quality repair sling is further improved.

The invention belongs to the technical field of conveying equipment and discloses a scissor lift which comprises a driving assembly, a lifting device, pressure detection assemblies, a lower connecting piece, a lifting belt, a drag chain and an upper connecting piece, the multiple pressure detection assemblies are installed at the bottom of the lower connecting piece, and the bottom of the lifting device is in transmission connection in the lower connecting piece. The top of the lifting device is in transmission connection in the upper connecting piece, the upper end of the upper connecting piece is connected with the connecting frame, the driving assembly is installed above the upper connecting piece, the other end of the driving assembly is connected with the hanging belts, the hanging belts are arranged in pairs, the bottoms of the hanging belts are installed below the lifting device, and the drag chains are arranged in pairs and installed between the lower connecting piece and the upper connecting piece. The drag chain is arranged outside the lifting device. The problems that in the prior art, due to the fact that hydraulic transmission is adopted by a shear fork type elevator, the maintenance cost is high, and the resource cost is high are solved. The application range and practicability are improved, and the use cost is reduced.

The utility model belongs to the technical field of transportation packaging bags, and particularly relates to an anti-expansion liquid bag for a container, which comprises a bag body made of a PE (polyethylene) film, the bag body is cuboid, and the anti-expansion liquid bag is characterized in that a sleeve made of PP (polypropylene) cloth is sleeved on the outer side of the bag body along the front-back direction, more than two waist hoops are coaxially arranged on the sleeve, and the inner perimeter of each waist hoop is smaller than the outer perimeter of the bag body; the left side and the right side of the sleeve are respectively and fixedly provided with more than two hanging belts, each hanging belt is provided with a free section upwards extending out of the sleeve, and the length of each free section is larger than the width of the bag body. The waist hoop can play a role in tightening the bag body, the hanging belt can be fixed on a container hanging ring on one side opposite to the hanging belt in a crossed mode, and when liquid in the bag body surges left and right in the transportation process, the hanging belt can pull the bag body in the direction opposite to the surging direction of the liquid, so that the bag body is prevented from shaking left and right by a large margin; the impact force on the side wall of the container is greatly reduced, so that the container expansion is effectively prevented.

Holder which features the following: a fastening arrangement (10) designed for fastening to a mounting piece (50); a support unit (20) rotatably arranged on the fastening arrangement (10) and having a chamber (21), wherein the chamber (21) is accessible from the outside or from the environment; a pin (30) that can be inserted into the chamber (21), the pin (30) having a pin tip (31) and a connecting point (32) spaced apart from the pin tip (31); and a cord winding device (40) arranged within the support unit (20), wherein the cord winding device (40) has a cord (41) extending into the chamber (21), with one end of the cord (41) being attached to the connection point (32) of the pin (30), wherein the cord winding device (40) provides an unwound configuration enabling a user to handle the pin (30) outside the chamber (21), and wherein the cord winding device (40) provides a coiled configuration in which a restoring or coiling force acts on the cord (41) and the pin is positioned inside the chamber.

The invention provides a hanging basket steel plate sling limiting device, and relates to the technical field of continuous beam cantilever casting auxiliary tools, the hanging basket steel plate sling limiting device comprises a steel plate sling, a clamping plate, a working pin and a limiting assembly; the limiting assembly comprises a placing plate, a supporting plate and fixing plates, the supporting plate is arranged at the lower end of the placing plate, fixing assemblies for connecting the supporting plate and the clamping plates are arranged in the supporting plate, the two fixing plates are symmetrically arranged, connecting pipes are connected to the outer sides of the fixing plates, and the ends, away from the fixing plates, of the connecting pipes are connected with moving plates which are connected with fixing rods; an inner rod is elastically arranged in the fixing rod, one end of the inner rod extends out of the fixing rod and is fixedly provided with a limiting plate, through holes for the limiting plate to penetrate through are correspondingly formed in the clamping plate and the fixing plate, and a control assembly for controlling the connecting pipe to move in the direction perpendicular to the fixing plate is arranged on the fixing plate. The invention solves the problems that the sling is not positioned in the middle of a working pin, so that the distribution of load on the sling is influenced, the deflection of a hanging system is further caused, and local overload or uneven stress is caused.

A vibration damping device for reducing vibration of an elevator rope includes a displacement amplifier arranged around a region from a first portion of the elevator rope drawn and a second portion of the elevator rope drawn from an opposite side of one or more sheaves in parallel with the first portion. The displacement amplifier is configured to amplify a displacement of each of the first portion and the second portion of the elevator rope. The device also includes a limiting member that controls displacement amplification performed by the displacement amplifier such that the displacement of the first portion or the second portion amplified by the displacement amplifier does not become greater than a first displacement, which is a displacement of the elevator rope by which the elevator rope is not allowed to return to an equilibrium position of the vibration.

The invention provides a method for determining a hoisting belt for hoisting a tripod, which comprises a tripod and a hoisting belt, the tripod comprises a front support rod and a rear pull rod, the tripod is arranged on a crane revolving platform, and the bearing capacity and the length of the hoisting belt are calculated, and the method comprises the following specific steps: S1, presetting the front support rod mounting position and the rear pull rod mounting position of the revolving platform; the front support rod is provided with a lower lifting lug and a mounting hole; the rear pull rod is provided with a lifting belt mounting hole and an assembly hole; s2, confirming the mounting position parameters of a front supporting rod and a rear pulling rod; s3, parameters between the lower lifting lug and the mounting hole are determined, and the length of the lifting belt is obtained; s4, confirming parameters of the rear pull rod; s5, determining parameters between the suspender and the front support rod and the rear pull rod, obtaining the suspender bearing capacity, and calculating the suspender bearing capacity and length conveniently and accurately.

The invention relates to the technical field of lifting appliances, in particular to a double-point unloading lifting appliance tool for blades of a wind driven generator, which is characterized in that adjusting frames are arranged at two ends of a longitudinal beam, a flat lifting belt is connected between the two adjusting frames, and the flat lifting belt supports the blades of the wind driven generator from bottom to top; a flexible airbag is fixedly adhered to the lower surface of the lifting plate, an annular plate is fixed to the upper surface of the lifting plate, and a communication port is formed in the surface of the lifting plate; a negative pressure cylinder is arranged on the peripheral side of the flexible air bag, and a sealing piston matched with the negative pressure cylinder is installed in an inner cavity of the negative pressure cylinder in a sliding mode. The device has the beneficial effects that a lifting plate is arranged below a longitudinal beam, a lifting disc is vertically installed in an inner cavity of an annular plate in a sliding mode, an inner cavity of a flexible air bag is inflated, the flexible air bag expands and presses down and tightly presses a fan blade, a negative pressure cylinder is adsorbed to the surface of the fan blade, and the fan blade is positioned in the horizontal direction; the device can effectively prevent the fan blade from shaking under the influence of airflow in the air, and the hoisting stability is improved.

The invention provides a vertical adjusting device for a hanging basket sling in bridge cantilever construction. The vertical adjusting device comprises a hanging basket body, an adjusting master control platform, a sling, an adjusting control assembly, a temporary locking assembly, a measuring assembly and an auxiliary supporting assembly. One end of the hanging basket body is installed on a bridge, the other end of the hanging basket body is overhung to the outer side of the bridge, the adjusting master control platform is installed at the other end of the hanging basket body, and the lower end of the sling is connected with the hanging basket body. The adjusting control assembly, the temporary locking assembly, the measuring assembly and the auxiliary supporting assembly are installed in the adjusting main control platform, and the hanging belt penetrates through the adjusting main control platform and is vertically and adjustably arranged through the adjusting control assembly; the temporary locking assembly is temporarily clamped on the hanging belt, a plurality of holes are formed in the hanging belt at equal intervals, the auxiliary supporting assembly can vertically penetrate through the hanging belt through one hole, and the measuring assembly is in movable contact with the hanging belt. The invention relates to the technical field of bridge construction, and can solve the problems of insufficient precision and low efficiency of manual adjustment of a hanging basket sling in the prior art.

The invention provides a method for hoisting a tripod by using a sling, the tripod comprises a front support rod and a rear pull rod, the tripod is arranged on a crane revolving platform, the tripod is hoisted by using a hoisting device, the hoisting device comprises a front lifting hook, a rear lifting hook and the sling, and the method comprises the following specific steps: connecting the front support rod with the rear pull rod; one end of the sling is connected with the sling connecting position of the front support rod, and the other end of the sling is connected with the sling connecting position of the rear pull rod; the rear lifting hook runs to pull up the front supporting rod to be close to one side of the lifting belt, so that the lifting belt is in a straightened state; the front lifting hook and the rear lifting hook cooperatively operate to pull the front supporting rod to be close to one side of the front lifting hook, so that the rear pull rod is in a vertical state; the front lifting hook and the rear lifting hook operate together, and the front supporting rod and the rear pulling rod are moved to the position above the rotary platform; the front supporting rod and the rear pulling rod are connected with the corresponding positions of the rotary platform, and operation is convenient, safe and reliable.

The invention discloses a double-sling suspension system of a suspension grouting bridge fabrication machine, and belongs to the technical field of highway and railway bridge concrete construction. The lifting mechanism is positioned between the leveling carrying pole beam and the front upper cross beam and is in driving connection with the leveling carrying pole beam; the two sling carrying pole beams are arranged at the lower end of the leveling carrying pole beam at intervals and are arranged on the two sides of the lifting mechanism; the two hanging belts are arranged corresponding to the leveling carrying pole beam, one end of each hanging belt is connected with a hinge lug pin shaft of the hanging seat of the front lower cross beam, and the other end of each hanging belt sequentially penetrates through the middle of the front upper cross beam, the hanging belt carrying pole beam and the leveling carrying pole beam; and the two fine adjustment mechanisms are arranged corresponding to the two sling carrying pole beams, and the fine adjustment mechanisms are arranged between the sling carrying pole beams and the front upper cross beam. The lifting points are reduced to four, the adjusting efficiency of the bottom die is improved by 1 / 3, and the problems of large labor intensity, mutual restriction and poor stress of manual control due to multiple lifting points are solved.

The utility model discloses an automatic calcium powder weighing and bagging structure, and relates to the field of bagging structures. An automatic calcium powder weighing and bagging structure comprises a supporting frame and further comprises a discharging pipe communicated with the lower portion of the supporting frame, a supporting plate is fixedly connected to the discharging pipe, and a supporting rod is fixedly connected to the supporting plate; the supporting rod is rotationally connected with a second rotating rod, and the other end of the second rotating rod is slidably connected with a sliding rod. The second rotating rod is fixedly connected with a hook, and the sliding rod is fixedly connected with a clamping plate. The ton bag is used for receiving the calcium powder falling from the discharging pipe; the hook is used for connecting a sling of the ton bag; when the sliding rod slides to drive the clamping plate to clamp and seal the bag opening of the ton bag, the second rotating rod and the hook rotate, and the hanging belt of the ton bag is tensioned towards the inclined upper part of the outer side by the hook; the material receiving opening of the ton bag can be clamped and sealed, dust is prevented from escaping when calcium powder is added into the ton bag, and meanwhile a user can replace and place a stacking bag conveniently.

The invention relates to the technical field of packing scale equipment, and provides a special packing scale for powdery sodium cyanide and a control method thereof.The special packing scale comprises a feeding hopper and a vibration table which are distributed up and down, a connecting flange coaxially fixed to a discharging opening of the feeding hopper, and a receiving hopper which is coaxially connected to the connecting flange in a sleeving mode, and the outer wall of the receiving hopper is annularly provided with a driving gear and is driven by a motor on the feeding hopper; at least one concave cavity is formed in the side wall of the receiving hopper, a rod body is hinged in the concave cavity, a replaceable balancing weight is arranged at the free end of the rod body, when the receiving hopper rotates, the rod body is unfolded under the action of centrifugal force and knocks a ton bag sling, meanwhile, the vibration table acts on the bottom of a ton bag, and the vibration table and the receiving hopper cooperatively excite the standing wave effect of the ton bag. The rod body periodically knocks the sling under the action of centrifugal force, and the frequency can be adjusted through the balancing weight. When the knocking frequency is close to the inherent frequency of the ton bag, vibration of the hanging belt can be transmitted to the whole bag body, the resonance phenomenon is caused, the vibration table at the bottom is matched to excite the standing wave effect, and loosening and even distribution of materials are achieved.

The invention discloses hoisting equipment for steel structure installation, and relates to the technical field of steel structure hoisting, the hoisting equipment comprises a hoisting arm and a hydraulic device, the end, away from the hoisting arm, of the hydraulic device is provided with a telescopic clamping jaw, the hoisting arm is internally provided with a moving assembly, and the outer side of the hydraulic device is provided with an anti-falling assembly and a rebound assembly; according to the anti-falling device for the steel structure, locking claws on a follow-up disc are meshed with inner ring teeth of a locking disc, and the follow-up disc is matched with an annular disc, so that a hanging belt is rapidly locked, and therefore the anti-falling effect of the steel structure is achieved, large enough force is applied at the moment when the steel structure falls, a rotating shaft drives the annular disc to rapidly rotate, and the anti-falling effect of the steel structure is achieved. The follow-up disc and the locking disc are combined through centrifugal force, so that the sling is rapidly locked, the whole equipment has redundant protection of the sling, a steel structure can be effectively prevented from continuously falling, falling accidents are avoided, and the safety of constructors is guaranteed.

A styptic harness tourniquet used by hands for providing a first aid to stop external arterial bleeding from injured limbs. The harness consists of a casing with Velcro fastener, a sling, a buckle at one end of the casing and a base with fixator with strap, windlass rod attached to the sling. The casing has at least two layers, the buckle contains at least one hole, the base contains at least six holes, and the strap of the fixator contains at least one hole. The holes in the buckle and base have teeth on one side. The windlass rod contains at least 1 cm of a smooth surface and at least 1.5 cm of a ribbed surface at the edges. The harness increases the reliability of the structure and the efficiency of its operation.

The utility model discloses a high-altitude automatic hooking device of a lifting belt for wind power, which belongs to the technical field of mechanical manufacturing and comprises a beam body, a lifting mechanism is arranged on the beam body, and a traction rope is arranged at the output end of the lifting mechanism; the two hook mechanisms comprise connecting frames, the two connecting frames are connected with the two ends of the beam body respectively, penetrating grooves are formed in the connecting frames, driving assemblies are arranged on the connecting frames, the output ends of the driving assemblies are fixedly connected with telescopic shafts parallel to the ground, and the telescopic shafts penetrate through the side walls of the connecting frames and extend into the penetrating grooves; guide assemblies are arranged on the connecting frame, and the traction rope extends into the penetrating groove through any guide assembly. Rigid connecting rings are fixedly connected to the two ends of the hanging belt respectively, the bottom of the traction rope extends out of the penetrating groove and is fixedly connected with any rigid connecting ring, and the two telescopic shafts are slidably connected with the inner walls of the two rigid connecting rings respectively. According to the utility model, the high-altitude automatic hooking operation of the bag hanging belt can be completed, and the operation safety is greatly improved.

The hospital gown special for the ICU patient comprises a one-piece gown and sleeves arranged on the left side and the right side of the one-piece gown, the one-piece gown comprises a front part and a rear part connected with the front part, a trapezoidal neckline is arranged on the front part, and a first window and first covering cloth used for shielding the first window are arranged on the portions, on the two sides of the trapezoidal neckline, of the front part respectively. A hanging belt is formed between the trapezoidal neckline and the first window, and the hanging belt is formed by movably connecting two cloth belts. Due to the design of the trapezoidal neckline, the neckline is wider, and tracheal incision nursing is facilitated; the first window on the left side of the trapezoidal neckline is used for routing of an electrocardiograph monitoring lead wire, and the first window on the right side of the trapezoidal neckline is used for penetration of a puncture pipeline.

The invention relates to an aerial sling hook device and a single-blade dismounting method of a wind driven generator, and belongs to the field of wind power equipment hoisting, the aerial sling hook device comprises a single-blade sling, a sling fixing part and a first electric detacher are fixedly arranged below the single-blade sling, the sling fixing part is fixedly connected with one end of a sling, and the sling fixing part is fixedly connected with the other end of the sling. A first ring buckle is arranged at the other end of the hanging belt; the first electric detacher is detachably provided with a winder, the winder is provided with a pulling rope used for pulling the first buckle to be connected with the first electric detacher, one end of the pulling rope is perpendicular to the ground, and the other end of the pulling rope penetrates through the winder to be fixedly connected with the first buckle. The hanging device has the beneficial effects that one end of the hanging belt is connected to the hanging belt fixing part, the other end of the hanging belt is connected to the traction rope, the hanging belt is pulled through the traction rope in the air, the first ring buckle is hung on the first electric detacher, hanging of the hanging belt in the air is achieved, the construction efficiency is improved, and the construction cost is reduced.

A semi-automatic blanking machine assisting laser pipe cutting blanking comprises a lifting mechanism and a blanking mechanism, the lifting mechanism is composed of a plurality of lifting units arranged side by side, and each lifting unit comprises a material supporting turning plate used for supporting finished pipes. A height adjusting driving cylinder for controlling the vertical height of the material supporting turnover plate and a supporting chain turnover plate turnover driving cylinder for controlling the material supporting turnover plate to turn over are arranged at the bottom of the material supporting turnover plate, the blanking mechanism is composed of a plurality of blanking tables which are perpendicular to the blanking direction and are arranged side by side, and a hanging belt is arranged in the blanking direction of the finished pipes. The lifting mechanism with the adjustable height is adopted for supporting the finished pipes cut by the pipe cutting machine, then the finished pipes slowly descend to the discharging table and finally roll down to the lifting belts in the material receiving bin, and the problems of impact and gouges in the whole recovery process of the finished pipes are solved; the series-connection modular design is adopted, feeding of pipes of various lengths can be adapted only by adjusting the number of the modules, and the whole machine is simple in structure and high in economical efficiency.

A boat stabilizer having an upper harness for attachment to a vessel, the upper harness having an assembly control system for controlling attached wing assemblies, each wing assembly having a wing attached to the assembly control system and a wing mount attached to the wing and the assembly control system. The boat stabilizer may be further comprised of a controllable parasail comprising a parasail canopy, a plurality of parasail cords attached the parasail canopy, a parasail mount attached to the upper harness and the parasail cords, a parasail control rudder attached to each parasail cords, and yaw and pitch controllers, both of which are attached to the parasail control rudder. The assembly control system is configured to work in conjunction with the controllable parasail to provide the desired balance of vertical lift and forward propulsion to the attached vessel, while also providing directional control to the attached vessel.

The invention belongs to the technical field of pipeline hoisting, and particularly relates to a pipeline construction device which comprises a mounting plate, a winding cylinder and a folding assembly. A mounting lug is fixedly connected to the mounting plate, and the winding cylinder is located on one side of the mounting plate and rotationally connected with the mounting plate; a lifting sling is wound on the winding cylinder; a pair of supporting corbels is hinged to the mounting plate, and a first driving mechanism for driving the pair of supporting corbels to open and close is arranged on the mounting plate; one of the supporting corbels is provided with a sling hook and a limiting shaft; the folding assembly comprises a left side driving rod and a right side driving rod; a clamping assembly is arranged on the left side driving rod, and a pair of limiting rollers is rotationally connected to the right side driving rod. The supporting corbels are automatically opened and closed to support the pipeline, so that a heavy lifting belt is prevented from being manually threaded at the bottom of the unlimited pipeline; retracting and releasing of the lifting sling and locking / releasing of the hook are both completed through mechanical driving, and a worker only needs to insert the fixing shaft into the clamping assembly on the ground and thoroughly breaks away from a high-risk area.

A pulley system for assisting in the performance of exercises includes a first and a second belt member each having an attachment ring member on a first end and a handle on an opposing end, where the attachment ring members are configured for attachment to a horizontal bar and the first and second belt members are configured each for having a portion of the belt member and the belt member over-hanging the horizontal pullup bar. The pulley system further includes an arm support member having at least two pulley elements each interfacing with respective intermediate sections of the first and second belt members which are threaded through the at least two pulley elements and where the pulley system is configured for supporting a user under their arms using the arm support member while the user simultaneously grabs the overhanging handles for enabling the user to enhance a leg lifting exercise.