Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
  • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
  • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
  • B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
  • B66C1/34—Crane hooks
  • B66C1/36—Crane hooks with means, e.g. spring-biased detents, for preventing inadvertent disengagement of loads

Definitions

• the present invention relates to an apparatus for removing a sling such as a wire rope, a resin fiber rope, a chain, a chain, or the like for lifting a heavy object from the heavy object.
• a sling such as a wire rope, a resin fiber rope, a chain, a chain, or the like for lifting a heavy object from the heavy object.
• the present applicant has provided an upper wire between a pace and a hook of a crane, and a lower wire whose base end is attached to the pace engages with a wire engaging portion of a heavy object
• a patent application was filed for a device for removing a heavy lifting material inserted into a mast with its ring at the tip of the base (Japanese Patent Application Laid-Open No. 7-255578).
• the base is composed of a pair of substantially rectangular plates, a pair of side plates arranged on both side edges of the plates for joining these plates at a predetermined interval, and a lower portion of the pair of plates.
• a lower block disposed at the center of the edge. T-shaped holes are formed in the center of the pair of plates so as to face each other, and the mast is erected on the lower block so as to protrude into the T-shaped holes.
• the slider which is slidably fitted to the mast, is pushed up by the first elastic body under no load so that the upper end thereof coincides with the upper end of the mast, and the slider lowering means overcomes the elastic force of the first elastic body. It is configured to lower the slider. Further, the hook means is configured to temporarily fix the slider in a state where the slider is lowered, and the mouth release means is configured to release the fixing of the slider. Further, the slider lowering means is inserted into the base so as to be able to move up and down, has a lower end protruding downward from the lower surface of the base, and has a sensor rod connected to the slider via a tension member.
• the upper wire is attached to the crane hook.
• the sensor port protruding downward from the lower surface of the base is pushed into the base, and the slider is moved to the first elasticity. Pile down to the elastic force of the body and descend.
• the locking means temporarily fixes the slider in a lowered state.
• the ring at the tip of the lower wire is fitted into the mast from the T-shaped hole.
• the elastic coefficient of the first elastic body that pushes up the ring also needs to be increased. For this reason, a large force is required to lower the slider. That is, the entire device must be piled on the elastic force of the first elastic body to have a self-weight capable of lowering the slider, and the weight of the device is more than necessary. There were also problems that increased.
• Another object of the present invention is to prevent the tip of the link lever from being released from the tip of the lever holder when lifting a heavy object, and to release the sling when the heavy object is lowered to a predetermined place. Easy and quick removal from heavy objects
• the object of the present invention is to provide a device for removing heavy lifting slings. Disclosure of the invention
• the invention according to claim 1 comprises a base 16 having a crane engaging portion 27 at the upper end of which a hook 26 a or a hook block of a crane 26 engages, A lever holder 17 whose center is pivotally attached to the first shaft 11 fixed to the base 16 below the joint 27, and a base fixed to the base 16 below the first shaft 11 Rotatably mounted on the second shaft 12, the tip of which is locked to the tip of the lever holder 17, and one end of which is hung on the hook or base 16 of the crane and engages with heavy objects 14.
• Heavy lifting device with release means 19 released from the tip Packaging is the removal apparatus.
• the hook 26a of the crane 26 is engaged with the crane engaging portion 27, and the sling is attached to the hook or base 16 of the crane.
• the base 16 is positioned directly above the weight 14, the sling 13 is engaged with the weight 14, and one end thereof is hung on the link lever 18, and then the end of the link lever is connected to the lever 14. Lock the tip of holder 17.
• the invention according to claim 2 is the invention according to claim 1, and furthermore, as shown in FIGS. 7 and 8, a link lever 18 is attached to the second shaft 12 so as to be rotatable. 8a, a bent portion 18b connected to the base and curved with a predetermined radius of curvature, a tip 18c that can be locked to the tip of the lever holder 17, a bent portion 18b, and a tip And a rod part 18d for connecting the other end of the link lever 18 to the link lever 18 so that the other end of the sling 13 engaged with the heavy object 14 is hooked on the link lever 18.
• the link lever 18 when the load of the heavy load 14 is much larger than the own weight of the link lever 18, the link lever 18 is released from the lever holder 17.
• the straight line L connecting the center point of the second shaft 12 and the limit action point P and the inside line of the rod 18 d If the angle formed is an obtuse angle, the link lever 18 rotates in a direction in which the rod portion 18 d shifts downward from the horizontal state, so that the other end of the sling 13 is separated from the link lever 18.
• the link lever 18 When the weight of the heavy object 14 is relatively small and the weight of the link lever 18 affects its rotation moment, the link lever 18 is released from the lever holder 17 to pull up the base 16 and When the part 18d moves from the upward state to the horizontal state, the line between the center point of the second shaft 12 and the center of gravity G of the link lever 18 and the inside line of the rod part 18d are formed. If the angle ⁇ is obtuse, the link lever Since the rod 18 rotates in a direction in which the rod portion 18 d shifts further downward from the horizontal state, the other end of the sling 13 is separated from the link lever 18.
• the invention according to claim 3 is the invention according to claim 1, and further, as shown in FIGS. 1 and 4, the release means 19 is provided on the base 16 so as to be able to move up and down, and the lever holder 17.
• a slider 31 that is engaged with the base end of the lever holder and urges the base end of the lever holder in the direction of pushing down, and a slider provided on the base 16 that engages with the slider 31 and temporarily lifts the slider.
• Locking means 3 2 for temporarily fixing the slider 3 1 and unlocking means 3 3 for releasing the temporary fixing of the slider 3 1, and the load of the heavy object 14 is applied to the link lever 18 via the sling 13.
• the hook 26a of the crane 26 is engaged with the crane engaging portion 27, and the sling 13 is attached to the hook or pace 16 of the crane.
• Hang one end if the base 16 is positioned directly above the heavy object 14 and the slider 31 is raised, the locking means 32 temporarily fixes the slider 31 in the raised state.
• the weight of the slider 31 is not applied to the base end of the damper 17, and the tip end of the lever holder 17 descends.
• the sling 13 is engaged with the heavy object 14, the other end is hooked on the link lever 18, and the end of the link lever is locked to the end of the lever holder 17.
• the invention according to claim 4 is the invention according to claim 3, and furthermore, as shown in FIGS. 1, 4 and 9, the pace 16 has the first plate 21 and the first plate 21 extending in the vertical direction.
• a fixed plate 24 provided horizontally extending or inclined between these plates, connecting the first and second plates, and having a through hole 24 a formed therein,
• a slider 31 is provided with a lifting rod 31a that is to play in the through hole 24a, and an engaging plate 31b that is provided integrally with the lifting rod on the upper part of the lifting rod and extends or tilts in the horizontal direction.
• the engagement plate 3 1b is configured to engage with the base end of the lever holder 17, and the load of the heavy object 14 is applied to the link lever 18 via the sling 13.
• the hook 26a of the crane 26 is engaged with the crane engaging portion 27, and the hook or base 16 of the crane is engaged. Hook one end of the sling 1 to 3.
• the locking means 33 temporarily fixes the lifting rod 3 1a in the raised state, so the lever The weight of the slider 31 is not applied to the base end of the holder 17, and the lever holder 17 rotates to a position where the end of the link lever 18 can be locked at the end thereof.
• the sling 13 is engaged with the heavy object 14, the other end is hooked on the link lever 18, and the end of the link lever is locked to the end of the lever holder 17.
• the invention according to claim 5 is the invention according to claim 3, and furthermore, as shown in FIGS. 1 and 4, the locking means 32 is fitted into the slider 31 so as to be vertically movable. It has a flexible bar 34 provided on the base 16 so as to be rotatable in a vertical plane in the fitted state and slidable in the longitudinal direction when the flexible bar 34 has a predetermined inclination angle.
• the slider 31 is configured to be locked to the edge of the engagement elongated hole 34a, and the unlocking means 33 is pivotally attached to the base 16 so as to contact the universal bar 34. It is characterized in that it is provided with an arm 36 for moving the movable bar 34 in a direction in which the slider 31 is released from the arm 34.
• the heavy lifting sling removal device when the slider 31 is raised, the slider is temporarily fixed by the swivel bar 34 in the raised state, and the arm 36 is rotated. As a result, when the movable bar 34 is moved in a predetermined direction, the temporary fixing of the slider 31 is promptly released. As a result, when the heavy object 14 is lifted, the tip of the link lever 18 can be prevented from being released from the tip of the lever holder 17. When the heavy object 14 is lowered to a predetermined place, the sling 1 3 can be easily and quickly removed from the heavy object 14.
• the invention according to claim 6 is the invention according to claim 3, and furthermore, as shown in FIGS.
• the locking means 32 causes the magnetic force to be applied when the slider 31 is raised.
• a first magnet 41 capable of releasing the slider 31 by holding and canceling the magnetic force, wherein the unlocking means 33 includes first switching means 51 for generating or extinguishing the magnetic force of the first magnet 41; And a remote control means 37 for controlling the first magnet 41 by remotely controlling the first switching means.
• the slider 31 when the slider 31 is raised, the slider is temporarily fixed by the magnetic force of the first magnet 41 in the raised state. As a result, when the heavy object 14 is lifted, the tip of the link lever 18 can be prevented from being released from the tip of the lever holder 17.
• the magnetic force of the first magnet 41 is turned off by remotely operating the first switching means 51 with the remote operation means 37.
• the temporary fixing of the slider 31 is released. As a result, the slider 31 descends, and the end of the link lever 18 is released from the end of the lever holder 17, so that the sling 13 can be quickly removed from the heavy object 14.
• the invention according to claim 7 is the invention according to claim 5, and furthermore, as shown in FIG. 1 and FIG. 4, the arm 36 is magnetically actuated while the universal bar 34 is locked to the slider 31.
• the universal bar 34 becomes the slider 31.
• the slider rises while maintaining the locked state, so that the slider is temporarily fixed by the free bar 34 at the highest position.
• the second switching means 52 is remotely operated by the remote control means 37 to eliminate the magnetic force of the second magnet 42
• the arm 36 rotates due to the elastic force of the elastic body 61, so that the universal arm 3 4 moves in a predetermined direction, and slider 3 1 moves freely. Released from. As a result, the slider 31 descends quickly.
• the invention according to claim 8 is the invention according to claim 1, and furthermore, as shown in FIG. 1, a handle 48 that can be gripped by an operator is protruded from the tip of the lever holder 17. It is characterized by.
• the tip of link lever 18 can be engaged with the tip of 17.
• FIG. 1 is a cross-sectional view taken along the line AA of FIG. 8 showing the removal device of the heavy lifting sling according to the first embodiment of the present invention.
• FIG. 2 is a cross-sectional view corresponding to FIG. 1 showing a state in which the sling is wound around a concrete pillar, the ring is fitted into the link lever, and the end of the link lever is rotated upward.
• FIG. 3 is a cross-sectional view corresponding to FIG. 1, showing a state in which the tip of a link lever is locked to the tip of a lever holder.
• FIG. 4 is a cross-sectional view corresponding to Fig. 1 showing a state in which a concrete pillar is lifted.
• Fig. 5 is a slider made of an elastic body when the concrete pillar lands at a predetermined location and the magnetic force of the second magnet is extinguished.
• FIG. 2 is a cross-sectional view corresponding to FIG. 1 and showing a state where is released from the universal bar.
• FIG. 6 is a cross-sectional view corresponding to FIG. 1 showing a state in which the slider is released from the free bar by the elastic body when the concrete pillar lands on a predetermined place to eliminate the magnetic force of the second magnet.
• Fig. 7 corresponds to Fig. 1 showing the state in which the slider is lowered by erasing the magnetic force of the first magnet, the end of the lever holder is raised by the engagement plate, and the end of the link lever is released from the end of the lever holder.
• FIG. 8 is an enlarged view of part B of Fig. 7.
• FIG. 9 is a cross-sectional view taken along the line C-C of FIG.
• FIG. 10 is a configuration diagram of remote control means for remotely controlling the first and second magnets.
• FIG. 11 is a perspective view showing a state where a concrete column is lifted by the device.
• FIG. 12 is a cross-sectional view corresponding to FIG. 1 showing a device for removing a heavy lifting sling according to the second embodiment of the present invention.
• FIG. 13 is a cross-sectional view corresponding to FIG. 12 showing a state in which the tip of the link lever is locked to the tip of the lever holder after the ring of the sling is fitted into the link lever.
• FIG. 14 is a front view showing a state where the concrete block is lifted by the removing device.
• FIG. 15 is a perspective view corresponding to FIG. 11 showing the third embodiment of the present invention.
• FIG. 16 is a cross-sectional view of a principal part showing a state where the tip of the link lever is locked to the tip of the lever holder according to the fourth embodiment of the present invention.
• FIG. 17 is a cross-sectional view of a principal part showing a state where the slider according to the fifth embodiment of the present invention is lowered, the locking pin pushes down the arm, and the tip of the arm contacts the second magnet.
• the removing device 10 of the sling 13 for lifting the heavy object 14 is substantially composed of a base 16 and a pair of first shafts 11 fixed to the base.
• a pair of lever holders 17 and 17 each having a center pivotally attached thereto, and a pair of link levers attached to the pair of second shafts 12 fixed to the base 16 such that the base ends thereof are rotatable.
• 18, 18 and release means 19 for releasing the tip of the link lever from the tip of the lever holder 17.
• the heavy object 14 is a concrete pillar in this embodiment.
• the sling 13 is a concept including a resin fiber rope such as a nylon rope, a chain, a chain, and the like, in addition to a wire rope.
• the base 16 is made up of the first and second steel plates formed by cutting 2 Plates 21 and 22 and upper plates 23 and 23 provided to extend horizontally at the top and center of the first and second plates to join these plates at a predetermined interval. And a fixing plate 24 (FIGS. 1 and 9).
• a crane engaging portion 27 with which the hook 26 a of the crane 26 is engaged.
• a sling 1 engaging with the concrete pillar 14 is provided.
• a sling hook 28 is provided on which one end of the hook 3 is hung.
• the sling hook 28 includes a first pin 28a fixed to the base 16 and a sling hook 28b having an upper end loosely fitted to the first pin and a lower end to which one end of the sling 13 is hung. Have. Both the crane engaging portion 27 and the first pin 28a are formed of a columnar steel material. A through hole 24a is formed at the center of the fixing plate 24.
• the pair of first shafts 1 1, 1 1 1 are fixed to the base 16 between the aperture plate 23 and the fixing plate 24 at predetermined horizontal intervals.
• the pair of lever holders 17 and 17 are pivotally attached to the first shafts 11 and 11 so that the distal end is heavier than the proximal end, that is, the distal end is lowered under no load. More specifically, the pair of laser holders 17, 17 are pivotally fitted into the pair of first shafts 11, 11, respectively, from the center in the longitudinal direction to the base end. The ends of the lever holders 17 and 17 are configured to protrude leftward and rightward of the first and second plates 21 and 22, respectively. In addition, at the tips of the pair of lever holders 17, 17, 17, elongated insertion holes 17 a, 17 a extending in the longitudinal direction of the lever holder are formed respectively (see FIG.
• the pair of second shafts 12 and 12 are fixed to the pace 16 near the sling hook 28 at predetermined intervals in the horizontal direction (FIG. 1).
• a pair of link levers 18, 18 are formed in a substantially J-shape, respectively, and these tips are rotated upward to insert long slots 17 a, 1 at the tips of the pair of lever holders 17, 17.
• the tip of the link lever is configured to be locked to the tip of the lever holder (Figs. 3 and 4).
• a ring 13 a formed at the other end of the sling 13 is fitted into the link lever 18.
• the releasing means 19 includes a slider 31 provided on the pace 16 so as to be able to move up and down, a locking means 32 for engaging with the slider and temporarily fixing the slider in a raised state, and a temporary movement of the slider.
• Lock release means 3 for releasing the fixation.
• the slider 31 is composed of a lifting rod 31a that is inserted into the through hole 24a of the fixing plate 24, and an engaging plate 3lb which is provided integrally with the lifting rod above the lifting rod and extends in the horizontal direction. And a weight 31c attached to the lower end of the lifting rod (FIGS. 1 and 9).
• the engagement plate 3 lb is configured to engage with the base ends of the pair of lever holders 17 and 17 when the slider 31 a is lowered to push down the base end of the lever holder (see FIG. 7). ).
• the locking means 32 includes a free bar 34 having an engagement long hole 34a which is loosely fitted to the slider 31 so as to be vertically movable, and a pair of first and second magnetic poles holding the slider 31 in a raised state.
• One magnet 41, 41 is provided (FIGS. 1 and 9).
• the universal bar 34 is formed of a flat bar, and is provided on the base 16 so as to be rotatable in a vertical plane and slidable in the longitudinal direction while being loosely fitted to the elevating rod 31a. Further, the engaging long hole 34a is formed at the center of the universal bar 34, and its length is formed slightly longer than the width of the lifting rod 31a.
• One end of the swivel bar 34 is placed near the base end of the arm 36 described later or kept slightly floating from the arm, and the other end of the swivel bar 34 is at a pace 1 above the fixed plate 24. It is idled between a pair of second pins 34 b and 34 b fixed to 6.
• the lifting bar 31a is configured to be locked to the edge of the long engagement hole 34a. That is, the swivel bar 34 rotates around the lower second bin 34 b and moves in the longitudinal direction of the swivel bar, and the width of the elevating rod 31 a at both end edges of the engagement elongated hole 34 a.
• the lifting rod is configured to be temporarily fixed in the raised state.
• the pair of first magnets 41, 41 are constituted by electromagnets that generate a magnetic force when energized and disappear when stopped, and are attached to the lower surface of the fixed plate 24 in opposition to the weight 31c.
• the unlocking means 33 includes an arm 36 capable of moving the free bar 34 in the direction of releasing the slider 31 from the free bar 34, and a first switching means 5 for generating or extinguishing the magnetic force of the first magnet 41. 1 and the first switching means is operated
• a remote control means 37 for controlling the stone 41 is provided (FIGS. 1, 9 and 10).
• the base end of the arm 36 is rotatably mounted via a third pin 36 b on a first bracket 36 a mounted on a fixed plate 24, and the arm 36 is mounted on a fixed plate 24. (Fig. 1). In the center of the arm 36, a through hole 36c into which the lifting rod 31a is loosely inserted is formed.
• the first switching means 51 is an electromagnetic relay having a coil section 51a and a switch section 51b (FIG. 10).
• the switch portion 51 When the coil portion 51a of the first switching means 51 is energized, the switch portion 51 is turned on, a current flows through the first magnet 41, and the first magnet generates a magnetic force.
• the switch section 5 lb is turned off, so that no current flows to the first magnet 41 and the magnetic force of the first magnet disappears. Is done.
• the first switching means 51 is accommodated in a box 38 (FIG. 1) mounted on the upper plate 23.
• the remote control means 37 includes a transmitting device 43 placed separately from the base 16 and a receiving device 44 housed in the box 38 (FIGS. 1 and 10).
• the transmission device 43 has an operation panel 43a, a wireless transmission section 43b connected to the operation panel, and a transmission antenna 43c connected to an output section of the wireless transmission section.
• the receiving device 44 has a receiving antenna 44a, a wireless receiving unit 44b having an input unit connected to the receiving antenna, and a battery 44c.
• the operation panel 43a is provided with a switch (not shown) that can be operated by an operator, and the output part of the radio receiving part 44b is connected to the coil part 51a of the first switching means 51. .
• the battery 44c is directly connected to the radio receiving section 44b, and is connected to the pair of first magnets 41, 41 via the switch section 51b of the first switching means 51.
• a second magnet 42 is mounted on the fixed plate 24, and the upper surface of the second magnet is configured to be in contact with the lower surface of the tip of an arm 36 bent in a crank shape (FIG. 1).
• the second magnet 42 has a permanent magnet and an electromagnet (not shown) .When the magnet is not energized, the arm 36 is held by the magnetic force of the permanent magnet. It is configured to be The electromagnet of the second magnet 42 is connected to the battery 44c via the switch 52b of the second switching means 52 (FIG. 10).
• the second switching means 52 is a coil This is an electromagnetic relay having a section 52a and a switch section 52b, and the coil section 52a is connected to an output section of the radio receiving section 44b.
• the second switching means 52 is configured to be remotely controlled by the remote control means 37.
• the switch portion 52b When the coil portion 52a of the second switching means 52 is energized, the switch portion 52b is turned on and current flows to the electromagnet of the second magnet 42, and the permanent magnet of the second magnet and the magnetic force of the electromagnet are canceled. Together, the arms 36 are configured to be released.
• the switch portion 52b when the energization of the coil portion 52a of the second switching means 52 is stopped, the switch portion 52b is turned off, and no current flows to the electromagnet of the second magnet 42, and the magnetic force of the second magnet causes The arm 36 is configured to be held.
• the second switching means 52 is housed in a box 38 (FIG. 1).
• the arm 3 is released in a direction to release the slider 31 from the universal bar 34 when the magnetic force of the second magnet 42 disappears.
• An elastic body 61 that urges 6 is passed over (FIG. 1).
• the elastic body 61 is a tension coil spring in this embodiment.
• a through hole 21 a is formed in the first plate 21 so as to be located above the tip of the arm 36, and an operation rope 46 is attached to the tip of the arm 36.
• the rope 46 is routed to the outside of the base 16 through the through hole 21a, and is pulled when the elastic body 61 or the linear body 47 described below breaks. Used for emergency release of the slider 31 from the universal bar 34.
• the elastic body 61 may be a compression coil spring or rubber.
• the weight 31c of the slider 31 and the arm 36 are connected by a flexible linear body 47 (FIGS. 1 and 6).
• the linear body 47 is formed of a shape memory alloy, and extends linearly when tension is applied to both ends (FIG. 6), and becomes prone U-shaped when the tension at both ends is released. ( Figure 1). Further, the linear body 47 passes through the through hole 24 b formed in the fixing plate 24, and the length of the linear body 47 becomes smaller when the slider 31 descends to reach the lowermost end.
• the arm 36 is set so as to contact the upper surface of the second magnet 42 (FIG. 6).
• a handle 48 that can be gripped by an operator is protruded from the distal end surface of the lever holder 17 (FIG. 1).
• the link lever 18 has a base 18a rotatably mounted on the second shaft 12 and a predetermined A bent portion 18b that curves with a radius of curvature, a tip portion 18c that can be engaged with the tip of the lever holder 17, and a rod portion 18d that connects the bent portion 18b and the tip portion 18c.
• point P in FIG. 8 is the limit action point
• point G is the center of gravity of Linkreva-18.
• the limit action point P is set from the state where the other end of the sling 13 engaged with the heavy object 14 is hung on the link lever 18 and the end of the link lever is locked to the end of the lever holder 17.
• the link lever rotates around the second shaft 12 and the rod 18 d is rotated.
• the tip of the link lever 18 may be used before the base 16 is pulled up by the crane 26 or when the base 16 is pulled up.
• the straight line L connecting the center point of the second shaft 12 and the limit action point P and the inside line of the rod 18 d are If the angle formed is an obtuse angle, the link lever 18 rotates in a direction in which the rod portion 18 d moves downward from the horizontal state, so that the ring 13 a of the sling 13 is moved from the link lever 18.
• the crane 26 may be used to raise the pace 16 before or when the pace 16 is raised.
• the tip of the link lever 18 rotates downward about the second shaft 12.
• the straight line M connecting the center point of the second shaft 12 and the center of gravity G of the link lever 18 to the inside of the rod 18 d.
• the angle between the line and the line is an obtuse angle, the link lever 18 rotates in the direction in which the rod 18 d moves downward from the horizontal state, so that the ring 13 a of the sling 13 becomes a link lever. Exit from 1-18.
• the sling 13 is detached from the concrete pillar 14 and pulled up together with the base 16. In this way, the sling 13 can be automatically removed from the concrete pillar 14 that has been lowered to a predetermined place.
• the switch portion 52b of the second switching means 52 is turned on by remote control, the switch portion 52b is turned off by remote control, so that the linear member 47 Is extended and the tip of the arm 36 is pulled downward, so that the tip of the arm 36 is attracted to and held by the second magnet by the magnetic force of the second magnet 42, and the universal bar 34 is engaged with the slider 31. Stop (Fig. 7).
• FIGS. 12 to 14 show a second embodiment of the present invention.
• Figures 12 to 14 show The same reference numerals as those in the first embodiment denote the same parts.
• the detaching device 110 of the sling 13 is composed of a base 1 16 and a single lever holder which is pivotally mounted at a substantially central position to a single first shaft 11 fixed to this pace. 1 17 and a single link lever 1 18 with the base end pivotally attached to a single 2nd shaft 12 fixed to the base 1 16 Release means 1 19 for releasing from the tip of 1 17.
• the heavy object 114 in this embodiment is a concrete work having an inverted U-shaped sling engagement portion 114a on the upper surface.
• the base 1 16 includes a first plate 12 1 (FIG. 12) and a second plate 12 2 (FIG. 14) formed by cutting a steel sheet into substantially inverted triangles, respectively, and a first and a second plate.
• a fixed plate 124 provided at the center of the first and second plates in order to join the two plates at a predetermined interval, and a first and second plate at a predetermined interval
• a lower plate 123 is provided horizontally below the first and second plates for joining (FIGS. 12 and 13).
• a crane engaging portion 27 to which the hook 26a of the crane 26 is engaged via the upper ring 126 (FIGS. 12 to 14).
• One end of the sling is hooked on the hook 26a of the crane 26 (Fig. 14).
• a through hole 24 a is formed at the center of the fixing plate 24.
• the first shaft 11 is fixed to the base 116 between the crane engaging portion 27 and the fixed plate 124 to the right (FIGS. 12 and 13).
• the lever holder 117 is pivotally attached to the first shaft 11 so that the distal end side is heavier than the base end side, that is, the distal end is lowered under no load.
• a portion of the lever holder 117 near the base end from the center in the longitudinal direction is swingably fitted into the first shaft 11, and the distal end of the lever holder 117 is the first and second shafts. It is configured to protrude rightward from the plates 1 2 1 and 1 2 2.
• an insertion slot 11a extending in the longitudinal direction of the lever holder is formed at the tip of the lever holder 117 (FIGS. 12 and 13).
• the second shaft 12 is fixed to the lower end of a base 116 that tapers downward toward the left.
• the link levers 1 1 8 are formed in a substantially J-shape, By rotating this tip upward and inserting it into the slot for insertion 1 17 a at the tip of the lever holder 117, the tip of the link lever is locked to the tip of the lever holder. It is composed (Fig. 13). A ring 13a formed at the other end of the ring 13 is fitted into the link lever 118.
• the releasing means 1 19 comprises a slider 13 1 provided on the base 1 16 so as to be able to move up and down, a locking means 13 2 which engages with the slider and temporarily fixes the slider in a raised state, Lock release means 1 3 3 for releasing temporary fixation.
• the slider 13 1 is composed of a lifting rod 13 1 a that plays in the through hole 1 24 a of the fixed plate 12 4 and an engagement plate 13 provided integrally with the lifting rod at the upper part of the lifting rod. lb and a spring receiving member 13 1 c attached to the lower end of the lifting rod (FIGS. 12 and 13).
• the engagement plate 3 1b is formed in a substantially inclined C-shape so that when the slider 13 1a descends, it engages with the base end of the lever holder 1 17 to push down the base end of the lever holder. (Fig. 12).
• the locking means 132 is provided with a free bar 134 having an engagement long hole 134a which is loosely fitted to the slider 1331 so as to be vertically movable (FIGS. 12 and 13).
• the swivel bar 13 34 is formed of a flat bar, and is provided on the base 116 so as to be rotatable in the vertical plane and slidable in the longitudinal direction in a state of being loosely fitted to the elevating bar 13 1 a.
• the engagement slot 13a is formed at the center of the universal bar 134, and its length is slightly longer than the width of the lifting bar 13a.
• One end of the universal bar 13 4 is placed near the base end of the arm 13 6 described later or is kept slightly floating from the arm, and the other end of the universal bar 13 4 is fixed plate 12 4 It is loosely inserted between a pair of second pins 34b, 34b fixed to the upper pace 116.
• the lifting rod 13 1 a is configured to be locked to the edge of the engagement slot 13 4 a. You.
• the lock releasing means 1 3 3 is composed of an arm 1 3 6 which can move the free bar 1 3 4 in the direction of releasing the slider 1 3 4 from the free bar 1 3 4 and a lock release spring 1 3 7 which lowers the slider. ( Figures 12 and 13).
• the base end of the arm 1 36 is rotatably mounted via a third pin 36 b on a first bracket 36 a mounted on a fixing plate 1 24, and the arm 1 36 is mounted on a fixing plate. 1 2 4 It is placed in an overlying position ( Figures 12 and 13).
• In the center of the arm 1336 there is formed a through hole 1336c into which the lifting rod 1311a is loosely inserted.
• the first plate 12 1 has a through hole 21 a formed above the tip of the arm 13 36, and an operating rope 46 is attached to the tip of the arm 13.
• the rope 46 is laid to the outside of the pace 116 through the mosquitoes 21a, and by pulling the rope 46, the slider 13 1 is released from the free bar 13 4 It has become.
• the unlocking spring 1337 is loosely fitted to the lifting rod 1311a, and is interposed between the fixed plate 124 and the spring receiving member 1311c.
• the reference numeral 1338 in FIGS. 12 and 13 denotes a compression coil spring for pressing the adjustable bar 1334 against the arm 1336.
• This spring 1338 is used to push the universal bar 13 4 into the arm 1 with a pressing force within a range that allows the universal bar 34 to rotate around the lower second pin 34b and move in the longitudinal direction of the universal bar. By pressing it against 36, it has a function to prevent the flexible bar 1 34 from jumping up due to vibration or impact.
• Reference numerals 1339 in FIGS. 12 and 13 denote stopper pins for preventing the engagement plate 13b from coming off the base end of the lever holder 117.
• the hook 26a of the crane 26 is engaged with the crane engaging portion 27 via the asphalt ring 126, and one end of the sling 13 is hung on the hook 26a (see Figs. 14 ) .
• the base 116 is positioned directly above the concrete block 114.
• the distal end of the link lever 1 18 is located below the base end (Fig. 12), and the handle 48 of the distal end of the lever holder 1 17 is gripped and the distal end of the lever holder 1 17 is lowered.
• the slider 13 1 engaging with the base end of the lever holder 1 17 rises.
• the slider 13 1 descends due to its own weight and the elastic force of the lock release spring 13 7, and the engagement plate 13 1 b pushes down the base end of the lever holder 11 17.
• the tip of the lever holder 117 rises, and the tip of the link lever 118 is released from the slot 111 for insertion and released, and the link lever 117 is released.
• the tip of 1 18 rotates downward, the ring 13 a of the sling 13 comes off the link lever 1 18 and separates.
• the sling 13 is disengaged from the sling engagement portion 114a of the concrete work 114 and pulled up together with the base 116.
• the sling 13 can be automatically removed from the concrete block 111 that has been dropped to a predetermined place.
• the arm 1336 rotates downward around the third pin 36b and lays on the fixed plate 124. a locks to the edge of the engagement slot 13a of the universal bar 1334.
• FIG. 15 shows a third embodiment of the present invention.
• the same reference numerals as those in FIG. 11 indicate the same parts.
• the upper part of the base 16 is assembled to the lower part of the hook pro- cess 227 of the crane 226. That is, the lower end of the connecting tool 228 suspended from the hook block 227 of the crane 226 is engaged with the upper part of the base 16. Except for the above, the configuration is the same as that of the first embodiment.
• the base 16 is always incorporated in the lower part of the crane hook 227 of the crane 226, so that there is no need to attach and detach the base 16 to and from the crane hook. Become. Operations other than those described above are substantially the same as those in the first embodiment, and a description thereof will not be repeated.
• FIG. 16 shows a fourth embodiment of the present invention.
• the same reference numerals as those in FIG. 1 indicate the same parts.
• a locking piece 317a extends downward from the tip of the lever holder 317, and the tip of the link lever 318 locks to the locking piece 317a. It is configured to Except for the above, the configuration is the same as that of the first embodiment.
• the locking piece 3 protruding from the lever holder 3 17 is used. Workability can be improved because it only needs to be locked to 17a. Operations other than those described above are substantially the same as those in the first embodiment, and a description thereof will not be repeated. 6198
• FIG. 17 shows a fifth embodiment of the present invention.
• the same symbols as those in FIG. 1 indicate the same parts.
• a locking pin 431d protrudes from the side surface of the elevating rod 31a of the slider 31.
• the locking pin 431d is protruded from the through hole 36c of the arm 36 so as to be able to contact the side edge in the width direction. Except for the above, the configuration is the same as that of the first embodiment.
• the lever holder is pivotally attached to the first shaft so that the distal end of the lever holder is heavier than the base end. If the lever holder is slidably and rotatably mounted on the end of the plate, the lever holder may be pivotally attached to the first shaft so that the distal end of the lever holder is lighter than the base end. The lever holder may be pivotally connected to the first shaft such that the distal end side and the proximal end side of the holder are balanced.
• the base end of the lever holder is slidably and rotatably attached to the end of the engagement plate
• the base extends in the longitudinal direction at the base end of the lever holder or the end of the engagement plate.
• An example is a structure in which a long hole is formed, and a pin that locks in the long hole is protruded from the end of the engagement plate or the base end of the lever holder.
• the lever holder is swingably mounted on the base via the first shaft, and the base is formed on the base end of the link lever which can be locked at the front end to the front end of the lever holder. It is rotatably mounted via the second shaft, and the release means is configured to lower the base end of the lever holder. Therefore, when a heavy load is applied to the link lever, the tip of the link lever is When the weight of the link lever is not applied to the link lever, the release means raises the tip of the lever holder. Thus, the tip of the link lever is released from the tip of the lever holder.
• the present invention provides a method of lifting heavy heavy objects in comparison with the conventional removal device, which has to be made larger than necessary according to the size of the lower wire ring. In addition, it is possible to secure the strength according to the load of the heavy object, and it is possible to minimize the necessary size.
• the link lever rotates in the direction in which the rod moves downward from the horizontal state, so that the other end of the sling is linked. Release from the lever.
• the link lever's own weight affects its rotational moment, if the angle /? Is obtuse, the link lever will move further downward from the horizontal state if the angle /? Is obtuse. The other end of the sling separates from the link lever.
• the lock means for temporarily fixing this slider in the raised state is provided on the base, and the lock release means releases the temporary fixation of the slider.
• the heavy object when a heavy object is lifted, the heavy object can be securely held, and in a state where the heavy object is lifted in advance, the temporary fixing of the slider is released by the lip releasing means, and the slider is lowered. By doing so, the sling can be automatically removed from the heavy object when the heavy object is lowered to a predetermined place.
• a lifting rod of the slider is allowed to play in a through hole formed in the fixing plate of the base, and an engagement plate provided on an upper part of the lifting rod is engaged with a base end of the lever holder. If a load is applied to the link lever by a heavy load via the sling, the state where the tip of the link lever is locked to the tip of the lever holder is maintained, and the link lever is connected to the link lever via the sling. When the load of the heavy object is not applied, the engaging plate raises the end of the lever holder by the weight of the lifting rod and the engaging plate, and releases the end of the link lever from the end of the lever holder.
• the heavy object when the heavy object is lifted, the heavy object can be securely held, and the temporary release of the slider is released by the hook releasing means in a state where the heavy object is lifted in advance, and the slider is lowered,
• the sling can be automatically removed from the heavy object when the heavy object is lowered to a predetermined place.
• the device for removing a heavy lifting sling according to the present invention can be used to remove the sling from a heavy lifting object when the lifting object is lowered to a predetermined place by engaging the sling.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Load-Engaging Elements For Cranes (AREA)

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Citations (5)

• 2002
  • 2002-02-25 JP JP2002048351A patent/JP4033687B2/ja not_active Expired - Fee Related
  • 2002-06-20 WO PCT/JP2002/006198 patent/WO2004000714A1/ja not_active Ceased

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