JPH0725578A - Detaching device of heavy object lifting member - Google Patents

Abstract

PURPOSE:To automatically disconnect a lower part lifting member from a heavy object put down on a specified place, not to damage a tension material, to put down the heavy object of any shape on the specified place by lifting it and to eliminate engagement work of the tension member to a hook of a crane. CONSTITUTION:An upper part wire 28 is provided between a base 12 and a hook 31a of a crane 31, a lower part wire 32 the base end of which is installed on the base 12 is engaged with a lifting member engagement part 11a of a heavy object 11, and a ring 32a of its head end is fit in a mast 17 erected on the base 12. A slider 18 fit in the mast 17 free to slide is pushed down so that its upper end agrees with at least the upper end of the mast 17 by a first elastic body in the state of no load, and as a slider lowering means 33 surpasses elastic force of the first elastic body, the slider 18 is lowered. A locking means temporarily fixes the slider lowering means in the state where the slider 18 is lowered, and the locking means is released by a locking release means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for removing a lifting material such as a wire, a cable, a rope or a chain for lifting a heavy object from the heavy object.

[0002]

2. Description of the Related Art When a heavy object such as a construction material is hoisted by a crane using a hoisting material such as a wire and lowered to a predetermined place in construction work or civil engineering work, the wire engaged with the heavy object is usually It is manually removed. On the other hand, when a predetermined place is underwater and a worker cannot easily go to that place, such as when a new breakwater or seawall is constructed or renovated, the wire is a heavy object, for example, a net-like basket filled with stone material. And left in that place (for example, Japanese Patent Publication No.
22).

However, in the case of arranging a large number of heavy objects such as nets filled with stones on the beach or jetty in the above-mentioned construction, leaving the wires at a unit price of about 10,000 yen per heavy object costs the construction cost. The diver removes the wire in the sea to push it up, but due to weather conditions and the installation of heavy objects, the removal work is not easy and improvement is desired.

In order to solve these problems, the present applicant has proposed that an upper lifting material is provided between a base and a hook of a crane, and a lower lifting material whose base end is attached to the base is a heavy lifting material. The slider, which is engaged with the engaging portion and the ring at the tip thereof is fitted into the mast which is erected on the base, and the slider which is slidably fitted into the mast, has its upper end aligned with at least the upper end of the mast by the elastic body under no load condition. Thus, a patent application has been filed for a device for removing a heavy lifting material configured such that the slider lowering means overcomes the elastic force of the elastic body to lower the slider when the base is lifted up as described above (Japanese Patent Application Laid-Open No. Hei 3 (1998)). -73986).

In the case where the slider descending means is a weight suspended from the slider via a suspending material, the suspended heavy object lands at a predetermined place and the weight is placed on the heavy object. Is a predetermined distance,
All of the ring at the tip of the lower hoisting material that was fitted into the mast comes out of the mast. When the base is lifted by the crane in this state, the lower lifting material comes off from the lifting material engaging portion of the heavy object. As a result, it is possible to install a heavy load using a crane even in a place where workers cannot be placed for safety and hygiene.

A fixed pulley provided with a slider descending means on the base, a tension member having one end attached to the slider through the pulley, and a tension member engaged with a hook of a crane so that the other end of the tension member is detachable. With a releaser, if the other end of the tension member is detached from the releaser at a desired position before the heavy object lands, the heavy object is landed at a predetermined place and the base is placed on the heavy object. Before touching, all the rings at the tip of the lower lifting material come off the mast.

[0007]

However, in the above-described conventional removing device, since the suspension member and the tension member are relatively long and exposed, the suspension member and the tension member may be damaged. In addition, in the case of the removing device using the weight, in the case where the upper surface of the heavy object is not flat, such as a tetrapot, when the heavy object is lowered to a predetermined position, the weight may not be stably placed on the heavy object. There is also. Furthermore, in the removal device using the above-mentioned releaser, the tension member detached from the releaser in order to lower the heavy object to a predetermined place must be locked to the releaser when another heavy object is lifted. However, there was a relatively troublesome problem.

A first object of the present invention is to provide a heavy-weight lifting material capable of automatically removing a lower lifting material engaged with a heavy material from the heavy material when the heavy material is lowered to a predetermined place. To provide a removal device. A second object of the present invention is that a heavy object of any shape can be lifted and lowered to a predetermined place without damaging the tension member, and the work of locking the tension member to the hook of the crane is unnecessary. Another object of the present invention is to provide a device for removing a heavy lifting material.

[0009]

The structure of the present invention for achieving the above object will be described with reference to FIGS. 1, 2 and 7 corresponding to the embodiments. The present invention relates to the lifting material engaging portion 11a.
Is a device for removing the lower hoisting material 32 engaged with the heavy object 11 having the above. This removing device includes a base 12, an upper hoisting member 28 having a base end attached to the base 12 and a tip end capable of being locked to a hook 31a of a crane 31, and a mast 1 erected on the base 12.
7, the base end is attached to the base 12, and the tip is a mast 17
A lower hoisting material 32 that has a ring 32a having a size that can be fitted into the hoisting material, and that engages with the hoisting material engaging portion 11a of the heavy object 11.
A slider 18 vertically movable on the mast 17,
The first elastic body 21 that pushes up the slider 18 in the unloaded state so that the upper end of the slider 18 matches at least the upper end of the mast 17.
A slider lowering means 33 for lowering the slider 18 by overcoming the elastic force of the first elastic body 21, a locking means 43 for temporarily fixing the slider lowering means 33 in the lowered state of the slider 18, and a locking means 43. And a lock releasing means 55 for releasing.

[0010]

After the heavy object 11 hoisted by the crane 31 using the upper hoisting material 28, the base 12 and the lower hoisting material 32 is lowered to a predetermined place, the lock releasing means 55 is used.
Thus, when the lock means 43 is released, the slider lowering means 33 becomes inoperative. As a result, the slider 18 is pushed up to at least the upper end of the mast 17 by the elastic force of the first elastic body 21, so that the ring 32a at the tip of the lower hoisting material 32 fitted in the mast 17 comes off from the mast 17. When the base 12 is lifted by the crane 31 in this state, the lower hoisting material 32 comes out of the hoisting material engaging portion 11a of the heavy object 11 and disengages from the heavy object 11. If the lock releasing means 55 releases the lock means 43 before lowering the heavy load 11 to a predetermined place, the slider lowering means 3
3 becomes inoperative, but at this time the mast 17 has a heavy load 1
Since the ring 32a of the lower hoisting member 32 on which the load of 1 acts is fitted, the slider 18 is held in the lowered state. As a result, since the slider 18 is pushed up to the upper end of the mast 17 by the elastic force of the first elastic body 21 when the heavy object 11 is lowered to a predetermined position, the ring of the lower hoisting member 32 fitted in the mast 17 is pushed. 32a comes out of the mast 17.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 to 4, in this example, the heavy object 11 is a concrete block, and an inverted U-shaped wire engaging part 11a is fixed to the upper surface of the center of both end edges thereof. The lifting material removing device includes a base 12 having a large T-shaped hole 12a formed in the center thereof. The base 12 is a pair of plates 13 and 13 formed by cutting a steel plate into a substantially rectangular shape, and a pair of plates 13 and 13 arranged on both side edges of the plate 13 to join the plates 13 and 13 with a predetermined gap. Side plates 14 and 14 and a lower block 16 arranged at the center of the lower edge of the plate 13. The plates 13 and 13 are the side plates 14 and 14 and the lower block 16.
Are joined together by welding.

The large-diameter holes 12a, 12a having a substantially T-shape are formed in the centers of the pair of plates 13, 13 so as to face each other, and the through holes 13a, 13a is formed. In the center of the lower surface of the base 12, the insertion hole 1 is vertically provided toward the large diameter hole 12a.
2b is formed, and the lower portion of the cylindrical mast 17 is inserted and welded into the insertion hole 12b. The mast 17 is erected on the base 12 so as to project into the large diameter hole 12a. The mast 17 has a large diameter portion 17a at the bottom and a large diameter hole 12
and a small diameter portion 17b on the upper side facing a. The first elastic body 21 is loosely fitted to the mast 17, and the small diameter portion 17 of the mast 17 is
A plate-shaped slider 18 is slidably fitted into the small diameter portion 17a of a. A pair of guide portions 18a, 18a slidable between the pair of plates 13, 13 are provided on both ends of the slider 18, respectively.
A pair of stoppers 19 and 19 for preventing the slider 18 from coming off the mast 17 are fixed between 13 by a knock pin 23. The first elastic body 21 is a compression coil spring in this example. When the slider 18 is biased by the first elastic body 21 and the upper surface of the slider 18 slightly projects from the upper end of the mast 17, the guide portion 18a of the slider 18 contacts the stopper 19 (FIG. 2). . Further, flanges 24, 24 extending substantially horizontally across the lower portions of the large diameter holes 12a, 12a are welded to the surfaces of the pair of plates 13, 13 respectively, and are vertically attached to the lower surface center of the flange 24 and the surface of the plate 13, respectively. The pair of shackle holders 26, 26 are welded. Shackle holder 26
A mounting hole 26a into which the shackle 27 can be inserted is formed (FIGS. 1 and 4).

Bolts 29 and 29, into which the base ends of the pair of upper wires 28 and 28 are fitted, are inserted into the through holes 13a and 13a formed in the pair of plates 13 and 13, respectively (FIGS. 2 and 3). A nut (not shown) is screwed into the bolt 29. The tip of the upper wire 28 is locked to the hook 31a of the crane 31 (FIG. 1). Further, the shackle 27 is fitted with the base end of the lower wire 32.
7 is loosely inserted into the mounting hole 26a of the shackle holder 26 (FIGS. 1 and 4). A ring 32a that can be fitted into the mast 17 is formed at the tip of the lower wire 32 (FIGS. 1 and 3). Further, a slider descending means 33 (FIGS. 1, 2, 3 and 5) for overcoming the elastic force of the first elastic body 21 to lower the slider 18 on the base 12 and the slider descending with the slider 18 lowered. Locking means 43 for temporarily fixing the means 33 and unlocking means 55 for releasing the locking means 43 are provided (FIGS. 2 to 4 and FIGS. 7 to 12).

As shown in detail in FIGS. 2, 3 and 5, the slider descending means 33 is inserted in the base 12 so as to be movable up and down, and the lower end thereof projects downward from the lower surface of the base 12.
A sensor rod 34 formed of a V-shaped steel plate, a movable pulley 41 rotatably attached to the sensor rod 34, and a base 1
2, a fixed pulley 42 rotatably attached to the base 2, and a tension member 36 having one end attached to the base 12 and the other end attached to the slider 18 and arranged via the movable pulley 41 and the constant pulley 42.
With. The sensor rod 34 includes a pair of legs 34a, 3
4a and a connecting portion 34b that connects the upper ends of these leg portions 34a, 34a. The lower ends of the pair of legs 34a, 34a project downward from the lower surface of the base 12 by the weight of the sensor rod 34 when the base 12 is lifted. Movable pulleys 41, 41 are attached to the centers of the pair of leg portions 34a, 34a, respectively, and a plate member 34c is stretched around the lower ends of the pair of leg portions 34a, 34a to form a bolt 34d and a nut 34.
It is fixed to the legs 34a, 34a by e (FIG. 4). A pair of constant pulleys 42, 42 are attached to the pair of plates 13, 13 on both sides of the large diameter portion 17a of the mast 17 protruding from the lower block 16, respectively. Tension 3
6 is a wire in this example, and when the leg portion 34a of the sensor rod 34 is pushed into the base 12, the slider 18
Are arranged so as to be lowered against the elastic force of the first elastic body 21. When the base 12 is lowered onto the heavy object 11, the leg portion 34a of the sensor rod 34 overcomes the elastic force of the first elastic body 21 by the own weight of the base 12 and pushes the base portion 12 into the base 12 to move the slider. It has a mass for lowering 18.

The locking means 43 is shown in FIG. 4, FIG. 7 and FIG.
As shown in detail in FIG. 12, the connecting portion 3 of the sensor rod 34
Locked member 4 which is integrally formed in the center of 4b and projects upward from the upper surface of base 12 to have a flat bar shape.
4 and a flexible bar 46 having a long hole 46a loosely fitted in the locked member 44 and formed in a flat bar shape extending in the width direction of the locked member 44. A box 47 having a lid 48 is attached to the upper surface of the base 12 by a bolt 49 (FIG. 4), and the locked member 44 is attached to the box 47.
Project inside. A roller 50 is provided on the upper end of the locked member 44.
Is rotatably mounted, and the width of the upper portion of the locked member 44 is narrower than that of the lower portion. The long hole 46a is a free bar 46
Is formed so as to extend in the longitudinal direction of the bar 46 at approximately the center of
The length is formed slightly longer than the width of the lower portion of the locked member 44.

A mounting hole 46b formed in a long hole extending in the longitudinal direction of the bar 46 and formed in a substantially horizontal direction is provided at the proximal end of the bar 46, and the bar 46 is fixed to a box 47. By inserting the pin 52 into the upper end of the J-shaped bracket 51 and the attachment hole 46b, the pin 52 is attached to the box 47 so as to be rotatable in the vertical plane and slidable in the longitudinal direction. When the swivel bar 46 reaches a predetermined angle, the locked member 44 is configured to be locked in the elongated hole 46a. In other words, the swivel bar 46 rotates around the pin 52 and moves in the longitudinal direction thereof, so that both widthwise end edges of the lower portion of the locked member 44 are locked to both end edges of the elongated hole 46a of the swivel bar 46. By doing so, the leg portion 3 of the sensor rod 34
4a is pushed into the base 12, that is, the slider 1
The locked member 44 is temporarily fixed in the lowered state of 8. An adjusting bolt 53 for adjusting the locking angle of the free bar 46 is screwed into the tip of the free bar 46, and the bolt 53 is fixed by a lock nut 54.

The lock releasing means 55 is, as shown in detail in FIGS. 7 and 9 to 12, the second elastic body 22 for urging the arm 57 in the direction of releasing the locked member 44 from the free bar 46, and the second elastic body 22 during operation. The arm 57 is held against the elastic force of the second elastic body 22, the locked member 44 is locked to the free bar 46, and the arm 57 is released at the time of non-operation to release the locked member 44 from the free bar 46. And an arm holder 58. The arm 57 is erected on the bottom surface of the box 47, and is rotatably attached to a bracket 59 fixed to the box 47 via a pin 61. The roller 50 faces the side edge of the arm 57. On one side surface of the lower end of the arm 57, a receiving portion 5 for receiving the tip of the adjusting bolt 53 of the universal bar 46.
7a is provided in a protruding manner, and a suction plate 62 is rotatably attached to the upper portion of the arm 57 via a pin 63. Second elastic body 2
2 is a tension coil spring in this example, and the bracket 5
It is stretched between the upper end of 1 and the upper end of the arm 57. The spring 22 urges the arm 57 to rotate in a direction to push up the tip of the free bar 46. The arm holder 58 is attached to the upper part of an inverted L-shaped bracket 64 fixed to the box 47 by a long bolt 66 and a cap nut 67 so as to face the suction plate 62, and a compression coil spring 68 is fitted into the long bolt 66. To be done. The arm holder 58 is configured to be movable in a direction approaching the bracket 64 against the elastic force of the compression coil spring 68. Further, an electromagnet (not shown) is built in the arm holder 58, and when the electromagnet is excited, it attracts the attracting plate 62 by its magnetic force, and when the electromagnet is demagnetized, the attracting plate 62 is armed by the elastic force of the second elastic body 22. It is designed to be separated from the holder 58. The side edge of the arm 57 facing the roller 50 is formed as an inclined surface 57b that approaches the locked member 44 as it goes downward.
b is adapted to rotate the arm 57 in a direction in which the suction plate 62 is brought into pressure contact with the arm holder 58 by contacting the roller 50 and lowering the roller 50.

As shown in detail in FIG. 8, the arm holder 58 is constructed so as to be remotely operated wirelessly by remote operation means 71. The remote control means 71 includes a transmitter 72 placed separately from the base 12 and a receiver 73 provided in the box 47. The transmitting device 72 has a switch operating panel 72a, a wireless transmitting section 72b electrically connected to the operating panel 72a, and a transmitting antenna 72c. The receiving device 73 includes a receiving antenna 73c and a wireless receiving unit 73a.
And a drive unit 73b that is electrically connected to the receiving unit 73a and controls the arm holder 58. By turning on and off a switch (not shown) provided on the switch operation panel 72a, the arm holder 58 is switched to an operating state or a non-operating state. That is, the wireless transmitter 72b
Transmits a control signal for the arm holder 58 from the transmitting antenna 72c by operating a switch on the switch operating panel 72a. The wireless receiver 73a receives the transmitted control signal via the receiving antenna 73c, and the driver 73b controls the arm holder 58 based on this received signal.

A method of using the heavy-weight lifting material removing device thus configured will be described with reference to FIGS. 2, 3 and 9 to 17. First, the base 12 is lifted by the crane 31 via the upper wire 28 (FIG. 2). At this time, the locked member 44 descends to the lowermost end as shown in FIG. 12, and the roller 50 of the locked member 44 rotates the arm 57 in the direction of the solid line arrow to move the suction plate 62 to the arm holder 58.
Since it is in pressure contact with the switch operation panel 72a, a switch (not shown) of the switch operation panel 72a is turned on, and the suction plate 62 is sucked by the arm holder 58 to prevent the arm 57 from rotating in the direction of the broken arrow. . The base 12 for engaging the lower wire 32 with the heavy object 11 to be lifted as shown in FIG.
Is lowered onto the heavy object 11, the leg portion 34a of the sensor rod 34 protruding downward from the lower surface of the base 12 is fixed to the base 12
When pushed in, the slider 18 moves down against the elastic force of the first elastic body 21. At this time, the locked member 44 moves up as shown in FIG. In this state, as shown in FIG. 13, the lower wire 32 is inserted through the wire engaging portion 11a of the heavy object 11, and then the ring 32a at the tip of the lower wire 32 is fitted into the mast 17.

Next, as shown in FIG. 14, a crane 31
When the heavy object 11 is hoisted via the upper wire 28, the base 12 and the lower wire 32, the locked member 44 is locked in the long hole 46a of the free bar 46 as shown in FIG. Does not fall. Next, when the heavy load 11 is lowered to the predetermined place G, the lower wire 32 is loosened as shown in FIG. If you turn off the switch in this state,
Since the arm holder 58 does not suck the suction plate 62,
The arm 57 rotates in the direction shown by the solid arrow in FIG. 9 by the elastic force of the second elastic body 22, and the inclined surface 57b of the arm 57 contacts the roller 50 (FIG. 10). At the same time, the arm 57 pushes up the tip of the swivel bar 46, so that the locked member 44 is released from the swivel bar 46, and the roller 50 begins to descend together with the locked member 44 by its own weight (FIG. 11). At this time, the roller 50 rotates the arm 57 in the direction of the broken line arrow while rolling on the inclined surface 57b of the arm 57, but the narrow portion of the upper portion of the locked member 44 is located in the elongated hole 46a of the free bar 46. Therefore, the long hole 46a of the free bar 46 does not engage with the locked member 44 in the middle of FIG.
Down to the position shown in FIG.
Is pressed against. Further, at the same time when the locked member 44 descends,
Since the slider 18 in the unloaded state rises due to the elastic force of the first elastic body 21, as shown in FIG.
The ring 32a of the item comes out of the mast and falls.

Further, as shown in FIG. 17, when a crane wire (not shown) is wound and the base 12 is lifted, the lower wire 32 comes out of the wire engaging portion 11a of the heavy object 11 and is pulled up together with the base 12. . In this way, the lower wire 32 can be automatically removed from the heavy object 11 that has been lowered to the predetermined place G.

Further, even if the heavy load 11 is lowered to a predetermined place G, the heavy load 11 can be lifted again to lower the heavy load 11 to another place without turning off the switch. Further, as shown in FIG. 14, when the switch is turned off with the heavy object 11 being lifted, the arm 57 is rotated by the elastic force of the second elastic body 22 in the direction indicated by the solid arrow in FIG. By pushing up, the locked member 44 is released from the free bar 46, and the locked member 44 descends (FIGS. 10 to 12). At this time, since the ring 32a of the lower wire 32 on which the load of the heavy object 11 acts is fitted in the mast 47, the slider 18 is held in the lowered state and the tension member 36 is loosened. As a result, when the heavy load 11 is lowered to a predetermined place G and the slider 18 is in a no-load state, the slider 18 is pushed up to the upper end of the mast 17 by the elastic force of the first elastic body 21 and is moved to the mast 17. The ring 32 a of the lower wire 32, which has been fitted, is removed from the mast 17.

18 and 19 show a second embodiment of the present invention. 18 and 19, the same reference numerals as those in the first embodiment denote the same parts. Free bar 86 of locking means 83
Is attached to a substantially U-shaped bracket 81 whose base end is fixed to the box 47 via a pin 82 so as to be rotatable and slidable in the longitudinal direction, and the arm 87 of the unlocking means 85 is substantially centered on the box 47. It is rotatably attached to a fixed substantially U-shaped bracket 88 via a pin 89. The tip of the arm 87 faces the lower surface of the tip of the free bar 86, and the operation rope 91 is attached to the base end of the arm 87.
An elongated hole 86a that can be loosely fitted in the locked member 84 is formed at substantially the center of the swivel bar 86.

A method of using the heavy-weight lifting material removing device configured as described above will be described. When the operation rope 91 is pulled in the direction of the solid line arrow in FIG. 18 with the heavy object being lifted or the heavy object being lowered to a predetermined place, the arm 8
Since the tip of 7 pushes up the tip of the swivel bar 86 as shown in FIG. 19, the locking of the elongated hole 86a of the swivel bar 86 to the locked member 84 is released, and the locked member 84 descends. Since the usage other than the above is the same as that of the first embodiment, the repeated description will be omitted.

20 to 22 show a third embodiment of the present invention. 20 to 22, the same reference numerals as those in the first embodiment denote the same parts. The lock means 103 includes a through hole 114a formed in a locked member 114 protruding into the box 47 attached to the upper surface of a base (not shown), and a lock pin 106 insertable into the through hole 114a.
The locked member 114 is provided integrally with the sensor rod 104, and protrudes upward from the upper end of the sensor rod 104. The lock pin 106 is slidably held by a pin holder 107 fixed to the box 47. The through hole 114a is the sensor rod 10 protruding from the lower end of the base.
The four leg portions 104a, 104a are formed in a position facing the lock pin 106 in a state where the four leg portions 104a, 104a are pushed into the base, that is, most of the locked member 114 projects into the box 47. The lock pin 106 has an insertion portion 106a inserted into the through hole 114a and a flange portion 106b formed at the rear end of the insertion portion 106a. A third elastic body 108 that urges the lock pin 106 to be pushed toward the locked member 114 is built in the pin holder 107. The third elastic body 108 is a compression coil spring in this example. 1
Reference numeral 04b designates the locked member 114 and the leg portions 104a, 104a.
Is a connecting portion for connecting the. The lock release means 105 has a through hole 114a through which the lock pin 106 inserted in the through hole 114a is inserted.
A guide hole 107a formed in the upper surface of the pin holder 107 extending in the longitudinal direction thereof, an operation pin 109 fixed to the lock pin 106 and protruding upward from the guide hole 107a, and an operation pin 109. And an operation bar 111 whose substantially center is locked. A locking hole 111a extending in the longitudinal direction is formed substantially at the center of the operation bar 111, and the locking hole 111a is loosely fitted in the operation pin 109. A base end of the operation bar 111 is rotatably attached to the box 47 via a pin 112, and an operation rope 113 is attached to a tip end of the operation bar 111.

A method of using the heavy-weight lifting material removing device configured as described above will be described. When the operation rope 113 is pulled in the direction of the solid arrow in FIG. 20 with the heavy object being lifted or the heavy object being lowered to a predetermined place, the operation bar 111 rotates about the pin 112 in the direction of the broken arrow. Then, since the locking hole 111a at the substantially center of the operation bar 111 is pulled out from the through hole 114a through the lock pin 106 via the operation pin 109 (FIG. 22), the locked member 114 descends. Since the usage other than the above is the same as that of the first embodiment, the repeated description will be omitted.

23 to 27 show a fourth embodiment of the present invention. 23 to 27, the same reference numerals as those used in the first embodiment denote the same parts. In this example, 4 on the upper surface of the heavy object 211
Four inverted U-shaped wire engaging parts 21 near each corner
1a is fixed (FIG. 25). The base 212 is a base frame 213 formed of H-shaped steel in a substantially rectangular frame shape, and a box-shaped base body 21 fixed to the center of the upper surface of the base frame 213.
4, a bar mounting base 215 having an inverted hat-shaped cross section, which is fixed to approximately the center of the lower surface of the base body 214, and to which a free bar 246 of a locking means 243 described later is mounted,
The fixed pulley 42 of the slider descending means 233 fixed to the lower surface of the
And a pulley mounting base 216 having a substantially U-shaped cross section. The base main body 214 is installed between two reinforcing members 213a and 213a fixed to the base main body 214 so as to be positioned in parallel to each other in the base frame 213. The two reinforcing members 213a and 213a are made of H-shaped steel.

A cylindrical mast 217 is erected at the center of the base body 214. The mast 217 is the base body 21.
4 has a large-diameter portion 217a inserted into the base 4 and welded to the base body 214, and a small-diameter portion 217b protruding above the base body 214. The first elastic body 2 is attached to the small diameter portion 217b.
After 21 is loosely fitted, a substantially frustoconical slider 218 is vertically movably fitted. A boss 218a is projectingly provided on the lower surface of the slider 218, and a long groove 217c extending in the vertical direction from the vicinity of the upper end of the small diameter portion 217b to the center is formed. A bolt 219 is screwed into the boss 218a, and its tip is loosely inserted into the long groove 217c (FIG. 24). The bolt 219 prevents the slider 218 from rotating with respect to the mast 217 and prevents the slider 218 from coming off the mast 217. The first elastic body 221 is a compression coil spring in this example. Further, a vertical hole 217d extending upward from the lower surface of the large diameter portion 217a of the mast 217 is formed.

On the base 212, slider lowering means 233 for lowering the slider 218 by overcoming the elastic force of the first elastic body 221, and locking means 243 for temporarily fixing the slider lowering means 233 in the lowered state of the slider 218.
And a lock releasing means 255 for releasing the lock means 243.
And are provided (FIGS. 23, 24, 26 and 2).
7). The slider lowering means 233 has a sensor rod 234 whose upper end is loosely inserted into the vertical hole 217d of the mast 217 and which passes through the bar mounting base 215 and the pulley mounting base 216 and whose lower end projects downward from the lower surface of the pulley mounting base 216;
4, a movable pulley 41 that is rotatably attached to the approximate center of 4, and a fixed pulley 42 that is rotatably attached to a pulley attachment base 216.
And a tension member 236 having one end attached to the pulley mount 216 and the other end attached to the slider 218 and arranged via the movable pulley 41 and the constant pulley 42.

In this example, the sensor rod 234 is one vertically extending flat bar which is held by the slide bearings 223 and 224 mounted on the bar mount 215 and the pulley mount 216 so as to be vertically movable. Mounting base 21
A rectangular plate 2 is provided at the lower end protruding downward from the lower surface of 6
34a is welded horizontally. The movable pulley 41 is 2 in this example.
The sensor rod 234 is attached to each of the wide sides of the sensor rod 234 (FIG. 24). The number of fixed pulleys 42 is two in this example, and the sensor rod 2 is mounted on the pulley mount 216.
It is attached so as to be located on both sides of 34. The tension member 236 is two wires in this example, and is arranged so that the slider 218 is lowered against the elastic force of the first elastic body 221 when the upper portion of the sensor rod 234 is pushed into the vertical hole 217d. To be done. The tension member 236 is loosely inserted into the pipe 237 which is vertically fixed and fixed in the base body 214 (FIGS. 23, 26 and 27).

A rod receiving member 238, with which the lower end of the sensor rod 234 can come into contact, projects below the base 212 and is attached to the base 212 so as to be vertically movable. The rod receiving member 238 is formed by bending a steel plate in this example,
Two reinforcing members 2 so as to cover the lower surface of the pulley mount 216.
It is attached between 13a and 213a. Rod receiving member 2
Four bosses 238a extending in the vertical direction are respectively fixed to the four corners of the No. 38, and these bosses 238a are attached to the two recesses 213b, 213b of the two reinforcing members 213a, 213a so as to extend in the vertical direction. It is loosely fitted to the four shafts 213c. Shaft 2
A compression coil spring 239, which biases the boss 238a in a downward direction, is loosely fitted in the 13c. When the base 212 is lowered onto the heavy object 211, the base 212 holds the sensor rod 234 via the rod receiving member 238.
It has a mass that overcomes the elastic force of the first elastic body 221 by its own weight and pushes it into the vertical hole 217d to lower the slider 218. The upper portion of the shaft 213c is formed to have a large diameter by a predetermined length, and the upper surface of the boss 238a loosely fitted to the shaft 213c has a large diameter portion 21 of the shaft 213c.
By contacting the stepped portion at the lower end of 3d, the rod receiving portion 2
38 and the base 212 can be prevented from approaching each other by a predetermined distance or more.

The locking means 243 is composed of the sensor rod 234.
The flexible bar 246 is formed in a flat bar shape having a long hole 246a loosely fitted therein and extending in the width direction of the sensor rod 234 in a loosely fitted state. The long hole 246a is a free bar 2
The bar 246 is formed substantially in the center of the bar 246 so as to extend in the longitudinal direction of the bar 246, and the length thereof is slightly longer than the width of the sensor rod 234. This bar 24 is attached to the base end of the swivel bar 246.
6, a mounting hole 246b formed in a long hole extending in the longitudinal direction and opened in a substantially horizontal direction is provided.
Is attached to the bar mount 215 so as to be rotatable in the vertical plane and slidable in the longitudinal direction by inserting the pin 252 into the upper end of the bracket 251 standing on the bar mount 215 and the mounting hole 246b. (FIGS. 23, 26 and 27). The sensor rod 234 is configured to be locked in the elongated hole 246a when the swivel bar 246 reaches a predetermined angle. In other words, the swivel bar 246 rotates about the pin 252 and moves in the longitudinal direction thereof so that the swivel bar 246 moves.
The both ends of the sensor rod 234 in the width direction are locked to the both ends of the elongated hole 246a of the sensor rod 234.
Is pushed into the vertical hole 217d, that is, the slider 21
The sensor rod 234 is temporarily fixed in the lowered state of 8.

The lock releasing means 255 moves the free bar 246 in a direction to release the sensor rod 234 from the free bar 246.
Is provided with two substantially L-shaped arms 257 and 257 for rotating. These arms 257 and 257 are attached to the bar mount 2
Each of them is pivotally mounted on the other 15 so as to face each other, and is rotatable in a vertical plane orthogonal to the vertical plane in which the free bar 246 rotates. The arms 257 and 257 have vertical portions 257a and 2
57a and horizontal portions 257b and 257b, respectively, and the vertical portions 257a and 257a extend upward along both outer surfaces of the base body 214, and the horizontal portions 257b and 257 are provided.
b extends so as to go under the tip of the free bar 246 (FIG. 24). Operation ropes 261 and 261 are attached to the upper ends of the vertical portions 257a and 257a, respectively, and a tension coil spring 258 is stretched between the upper ends of the vertical portions 257a and 257a. The spring 258 is inserted into a pipe 259 which extends horizontally in the base body 214 and is fixed to the bar mounting base 215 in a direction in which the vertical portions 257a and 257a are brought closer to each other, that is, the horizontal portions 257b and 257b are separated from the free bar 246. Energize upward.

Four inverted U-shaped shackle holders 226 are fixed to the upper surface of the base frame 213 near both ends of the two reinforcing members 213a and 213a. The four upper wires 2 are attached to these holders 226 via shackles 27.
The base ends of the 28 are attached, and the tip of the upper wire 228 is locked to the hook 31 a of the crane 31. Further, four U-shaped shackle holders 229 are fixed to the lower surface of the base frame 213 near the four corners, respectively.
Four inverted U-shaped wire guides 227 are fixed near the four corners on the upper surface of the base frame 213.
4 through the shackle 27 to the shackle holder 229.
The base ends of the lower wires 232 of the book are attached respectively, and the ring 232a formed at the distal end of the lower wire 232 includes a wire engaging portion 211a of the heavy object 211 and a wire guide tool 22.
7 and then is inserted into the mast 217 (FIG. 23,
26 and 27).

A method of using the heavy-weight lifting material removing device configured as described above will be described. As shown in FIGS. 23 and 24, when the base 212 is lowered onto the heavy object 211 in order to engage the lower wire 232 with the heavy object 211 to be lifted, first, the rod receiving member 238 comes into contact with the upper surface of the heavy object 211, The base 212 is further lowered and the rod receiving member 2
It stops when approaching 38 to a predetermined distance. At this time, the sensor rod 234 whose lower end is in contact with the rod receiving member 238 is pushed up relative to the mast 217, and the upper portion of the sensor rod 234 is positioned at the vertical hole 21 of the mast 217.
7d, that is, the moving pulley 41 is attached to the sensor rod 2
Since it moves upward together with 34 with respect to the mast 217, the other end of the tension member 236 pulls the slider 218 downward. As a result, the slider 218 moves the first elastic body 2
It descends against the elastic force of 21. In this state, after inserting the ring 232a at the tip of the lower wire 232 into the wire engaging portion 211a of the heavy object 211 and the wire guide 227,
Fit into the mast 217 (FIG. 25).

Next, as shown in FIGS. 25 and 26, when the heavy object 211 is lifted by the crane 31 via the upper wire 228, the base 212 and the lower wire 232.
The base 212 rises while the rod receiving member 238 is in contact with the upper surface of the heavy object 211. As the base 212 rises, the shaft 213c attached to the recess 213b of the reinforcing member 213a also rises, and the boss 2 of the rod receiving member 238 is lifted.
When 38a reaches the lower end of the shaft 213c, the rod receiving member 238 separates from the heavy object 211 and rises together with the base 212. At this time, since the sensor rod 234 is locked in the long hole 246a of the free bar 246, the mast 21
7 is kept pressed into the vertical hole 217d. As a result, the rod receiving member 238 separates from the lower end of the sensor rod 234.

Next, when the heavy object 211 is lowered to a predetermined place, the lower wire 232 is loosened. At this time, the base 212 is kept in a state of being lifted by the crane 31 so that the rod receiving member 238 does not contact the heavy object 211.
In this state, if one of the operating ropes 261 and 261 is pulled in the direction of the solid arrow in FIG.
The horizontal portion 257b of the above pushes up the lower end surface of the free end bar 246 so that the sensor rod 234 is released from the free end bar 246. The sensor rod 234 descends due to its own weight and the elastic force of the first elastic body to come into contact with the rod receiving member 238, and at the same time, the slider 218 that has become unloaded due to the landing of the heavy object 211 has the elastic force of the first elastic body 221. (Fig. 27), the ring 2 of the lower wire 232.
32a falls out of the mast 217 and falls. Further, when a crane wire (not shown) is wound up and the base 212 is lifted, the lower wire 232 comes off from the wire guide 227 and the wire engaging portion 211a of the heavy object 211 and the base 2
Raised with 12.

In the first embodiment described above, the lifting material removing device of the present invention is applied to civil engineering and construction work, but the device of the present invention is not limited to this, and a place where a heavy object is installed. It can also be applied when there is a safety or hygiene problem for the worker to go to. Further, in the above-mentioned first and fourth embodiments, an example of wires is shown as the upper hoisting members 28, 228, the lower hoisting members 32, 232, and the tension members 36, 236, but not limited to wires, cables, ropes, chains, etc. You may use. In addition, in the first embodiment, the pair of plates 13 and 13 made of steel plates are replaced by the pair of side plates 14 and 1.
Although the base 12 is formed by joining the base 4 and the lower block 16 by welding, the base may be integrally formed of cast steel or cast iron.

In the first and fourth embodiments, the concrete block is used as the heavy object and the inverted U-shaped hook is used as the lifting member engaging portion. However, the heavy object is a columnar body such as a telephone pole. Alternatively, it may have a plurality of protrusions such as a tetrapot, and in these heavy objects, the entire peripheral surface of these heavy objects serves as a lifting material engaging portion, and the lower lifting material is wound around these peripheral surfaces. In the first and fourth embodiments, the movable pulley is attached to the sensor rod, the constant pulley is attached to the base, and the tension member having one end attached to the base is routed through the movable pulley and the constant pulley. Was attached to the slider, but if one end of the tension member is attached to the sensor rod, the other end is attached to the slider, and the tension member is routed through the constant pulley, the moving pulley becomes unnecessary. Further, in the first and fourth embodiments described above, in order to engage the lower wires 32, 232 with the heavy objects 11, 211 to be lifted, as shown in FIGS.
As shown in FIG.
Although it was placed above, if the heavy object is not flat, such as a tetrapot or a telephone pole, the base 12, 21
2 to the ground or the like near the heavy object and slide 18,
8 is lowered and locked, and in this state, the bases 12, 21
2 is lifted again by a crane and moved above the heavy object, so that the lower wires 32, 2 are attached to the heavy object.
By engaging 32, the ends of the wires 32, 232 can be fitted into the masts 17, 117.

In the first and second embodiments, the locked member is formed in the shape of a flat bar, but if the locked member can be locked in the long hole of the free bar, the locked member may be a round bar, a round pipe, or any other shaped member. You may form with. Further, although the through hole is formed in the locked member of the sensor rod in the third embodiment, it may be formed in the leg portion or the connecting portion of the sensor rod.
Furthermore, the masts 17 and 11 in the above-mentioned first to fourth embodiments
7, sliders 18, 118, elastic bodies 21, 22, 221
The shapes and structures of the above are examples, and are not limited to the above examples as long as they have equivalent functions.

[0041]

As described above, according to the present invention, the base is hoisted to the hook of the crane through the upper hoisting material, and the lower hoisting material having the base end attached to the base is engaged with the heavy material hoisting material. A slider provided on a mast which is engaged with the base and is vertically movable on a mast which is vertically installed on the mast. The tip of the lower hoisting member in a state where the slider is lowered by the slider lowering means by overcoming the elastic force of the first elastic body. The ring is inserted into the mast, the slider lowering means is temporarily fixed while the lock means is in the lowered state, and the lock releasing means releases the lock means. When the lock releasing means releases the lock means when lowered, the slider is lifted by the elastic force of the first elastic body and the ring of the lower hoisting member comes off the mast. As a result, the lower lifting material can be automatically removed from the heavy object by raising the base with a crane, which not only saves a great deal of labor, but also does not allow workers to be placed for safety and hygiene. It is possible to easily install heavy objects at places by using a crane.

Further, the slider lowering means is vertically movably inserted into the base, and the lower end of the sensor rod projects downward from the lower surface of the base, the movable pulley rotatably attached to the sensor rod, and the movable pulley. The fixed pulley attached and one end attached to the base and the other end attached to the slider, and arranged through the movable pulley and the constant pulley so as to lower the slider when the sensor rod is pushed into the base. If it is configured to have a tension member, the tension member is barely exposed and relatively short compared to the conventional weight removing device in which the suspension member and the tension member are relatively long and exposed. There is nothing to do.

In addition, in the case of a tetrapot such as one in which the upper surface of the heavy object is not flat, the present invention is not suitable for removing the heavy object, as compared with a conventional weight removing device that does not rest on the heavy object in a stable state. Any shape can be hoisted and lowered into place. Further, compared to a conventional releaser-based removal device in which a tension member that has been detached from a releaser must be re-engaged with the releaser in order to lift another heavy item when lowering a heavy item in place. The present invention eliminates such work. In particular, if the remote control means is used, a heavy object can be easily lowered to a distant place.

[Brief description of drawings]

FIG. 1 is a perspective view of essential parts showing a state in which a heavy object is hoisted by a crane via a device for removing a heavy object hoisting material according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG. 1 showing a state in which the slider lowering means of the removing device is deactivated and the slider is raised.

FIG. 3 is a cross-sectional view corresponding to FIG. 2, showing a state in which the slider lowering means is actuated to lower the slider.

FIG. 4 is a sectional view taken along line BB of FIG.

5 is a cross-sectional view taken along line CC of FIG.

6 is a cross-sectional view taken along the line DD of FIG.

7 is an enlarged perspective view of an E portion of FIG.

FIG. 8 is a configuration diagram of remote operation means for remotely operating the arm holder.

FIG. 9 is an enlarged sectional view of an E portion of FIG. 2, showing a state in which the swivel bar is locked to the locked member.

10 is a cross-sectional view corresponding to FIG. 9 showing a state in which the arm rotates in a direction to release the locking of the free bar to the locked member and immediately before the locked member descends.

FIG. 11 is a cross-sectional view corresponding to FIG. 9 showing a state where the locked member is descending.

FIG. 12 is a cross-sectional view corresponding to FIG. 9, showing a state in which the locked member is lowered to the lowermost end.

FIG. 13 is a main part front view showing a state in which the base is placed on a heavy object to be lifted from now on and the ring at the tip of the lower lifting material is fitted into the mast.

FIG. 14 is a front view corresponding to FIG. 13, showing a state in which the heavy object is lifted by a crane through a removing device.

FIG. 15 is a front view corresponding to FIG. 13, showing a state where the heavy object is landed on a predetermined place.

FIG. 16 is a front view corresponding to FIG. 13, showing a state in which the lock device is released by the lock release means, and the ring at the tip of the lower lifting material in which the slider is fitted in the mast is removed from the mast.

FIG. 17 is a front view corresponding to FIG. 13, showing a state in which the removal device is hoisted by a crane and the lower hoisting material is pulled out from the heavy material hoisting material engaging portion.

FIG. 18 is a perspective view corresponding to FIG. 7, showing a state in which the universal bar of the second embodiment of the present invention is locked to the locked member.

FIG. 19 is a perspective view corresponding to FIG. 19 showing a state immediately before the locked member is lowered by rotating the arm in a direction to release the locking of the free bar to the locked member.

FIG. 20 is a sectional view corresponding to FIG. 7, showing a state in which the lock pin of the third embodiment of the present invention is inserted into the through hole of the locked member.

21 is a cross-sectional view taken along the line FF of FIG.

22 is a sectional view corresponding to FIG. 21, showing a state in which the lock pin is pulled out from the through hole of the locked member.

FIG. 23 is a sectional view taken along the line GG of FIG. 24, showing a state where the slider lowering means of the fourth embodiment of the present invention is actuated to lower the slider.

FIG. 24 is a sectional view taken along line HH of FIG. 23.

FIG. 25 is a perspective view of essential parts showing a state in which a heavy load is lifted by a crane through the heavy load lifting material removing device.

FIG. 26 is a cross-sectional view corresponding to FIG. 23, showing a state where the heavy object is lifted by a crane via a removing device.

FIG. 27 is a cross-sectional view corresponding to FIG. 23, showing a state in which the lock device is released by the lock release means, and the ring at the tip of the lower lifting material in which the slider is fitted in the mast is removed from the mast.

[Explanation of symbols]

 11, 211 Heavy objects 11a, 211a Wire engaging part (lifting material engaging part) 12,212 Base 17,217 Mast 18,218 Slider 21,221 1st elastic body 22 2nd elastic body 28,228 Upper wire (upper part) Lifting material) 31 Crane 31a Hook 32,232 Lower wire (lower lifting material) 32a, 232a Ring 33, 233 Slider lowering means 34, 104, 234 Sensor rod 36, 236 Tension material 41 Moving pulley 42 Constant pulley 43, 83, 103 , 243 Locking means 44, 84 Locked member 46, 86, 246 Flexible bar 46a, 86a, 246a Long hole 55, 85, 105, 255 Lock releasing means 57, 87, 257 Arm 58 Arm holder 71 Remote operating means 106 Lock pin 108 third elastic body 114a through hole 38 rod receiving member

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] May 6, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

However, in the case of arranging a large number of heavy objects such as nets filled with stones on the beach or jetty in the above-mentioned construction, leaving the wires at a unit price of about 10,000 yen per heavy object costs the construction cost. Therefore pushes up, but divers have remove the wires in the sea, by the installation state of weather conditions and heavy, the removal operation is not easy, improvement has been desired.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0005

[Correction method] Change

[Correction content]

When the slider lowering means is a weight suspended on the slider via a suspending material, the suspended heavy object lands on a predetermined place, and the weight is mounted on the heavy object. Ri, further base when lowered by a predetermined distance, all the tips of the ring of the bottom hoisting member which has been fitted into the mast exit from the mast. When the base is lifted by the crane in this state, the lower lifting material comes off from the lifting material engaging portion of the heavy object. As a result, it is possible to install a heavy load using a crane even in a place where workers cannot be placed for safety and hygiene.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction content]

A fixed pulley provided with a slider descending means on the base, a tension member having one end attached to the slider through the pulley, and a tension member engaged with a hook of a crane so that the other end of the tension member is detachable. With a releaser, if the other end of the tension member is detached from the releaser at the desired position before the heavy load lands, the heavy load will land on the heavy load after landing in place. All the rings at the tip of the lower lifting material come out of the mast before the base contacts.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 to 12 , in this example, the heavy object 11 is a concrete block, and an inverted U-shaped wire engaging portion 11a is fixed to the upper surface of the center of both end edges thereof. The lifting material removing device includes a base 12 having a large T-shaped hole 12a formed in the center (FIGS. 1 to 1).
4) . The base 12 is a pair of plates 13 and 13 formed by cutting a steel plate into a substantially rectangular shape, and a pair of plates 13 and 13 arranged on both side edges of the plate 13 to join the plates 13 and 13 with a predetermined gap. Side plates 14, 14 of
Lower block 16 arranged at the center of the lower edge of the plate 13
Have and. The plates 13 and 13 are joined by welding via the side plates 14 and 14 and the lower block 16.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

[0013] through holes 13a formed in the pair of plates 13 and 13, bolts 29, 29 fitted to the base end of the pair of upper wires 28 and 28 to 13a are inserted respectively (FIGS. 2 and 3), A nut (not shown) is screwed into the bolt 29. The tip of the upper wire 28 is locked to the hook 31a of the crane 31 (FIG. 1). The base end of the lower wire 32 is fitted into the shackle 27, and the shackle 27 is loosely inserted into the mounting hole 26a of the shackle holder 26 (FIGS. 1 and 4). The mast 1 is attached to the tip of the lower wire 32.
The ring 32a which can be fitted in 7 is formed (FIGS. 1 and 3). In addition, the slider lowering means 33 for lowering the slider 18 by overcoming the elastic force of the first elastic body 21 on the base 12.
(FIG. 1, FIG. 2, FIG. 3 and FIG. 5), a lock means 43 for temporarily fixing the slider lowering means 33 in a lowered state of the slider 18 and a lock releasing means 55 for releasing the lock means 43 are provided. 2 to 4 and 7 to 1
2).

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

As shown in detail in FIGS. 2, 3 and 5, the slider descending means 33 is inserted in the base 12 so as to be movable up and down, and the lower end thereof projects downward from the lower surface of the base 12.
A sensor rod 34 formed of a V-shaped steel plate, a movable pulley 41 rotatably attached to the sensor rod 34, and a base 1
2, a fixed pulley 42 rotatably attached to the base 2, and a tension member 36 having one end attached to the base 12 and the other end attached to the slider 18 and arranged via the movable pulley 41 and the constant pulley 42.
With. The sensor rod 34 includes a pair of legs 34a, 3
Has a 4a, these legs 34a, and a connecting portion 34b for connecting the upper end of 34a. The lower ends of the pair of legs 34a, 34a project downward from the lower surface of the base 12 by the weight of the sensor rod 34 when the base 12 is lifted. The movable pulleys 41, 41 are attached to the centers of the pair of leg portions 34a, 34a, respectively, and a plate member 34c is stretched over the lower ends of the pair of leg portions 34a, 34a, and the leg portions 34a, 34a are fixed by bolts 34d and nuts 34e. 34a, respectively (FIG. 4). Between the pair of plates 13, 13 on both sides of the large diameter portion 17a of the mast 17 protruding from the lower block 16.
The fixed pulleys 42, 42 are attached respectively. The tension member 36 is a wire in this example, and when the leg portion 34 a of the sensor rod 34 is pushed into the base 12,
8 is arranged so as to be lowered against the elastic force of the first elastic body 21. The base 12 is a heavy load 11 based on the base 12.
When lowered, the leg portion 34a of the sensor rod 34 has a mass that pushes the leg portion 34a of the sensor rod 34 against the elastic force of the first elastic body 21 into the base 12 by the own weight of the base 12 to lower the slider 18.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

The locking means 43 is shown in FIG. 4, FIG. 7 and FIG.
As shown in detail in FIG. 12, the connecting portion 3 of the sensor rod 34
4b, a locked member 44 that is integrally provided upright in the center of the base 4 and protrudes upward from the upper surface of the base 12 and is formed in a flat bar shape; and a long hole 46a that is loosely fitted in the locked member 44. 44 and a free bar 46 formed in a flat bar shape extending in the width direction. A box 47 having a lid 48 is attached to the upper surface of the base 12 by a bolt 49 (FIG. 4), and the locked member 44 projects into the box 47. The roller 50 is rotatably attached to the upper end of the locked member 44, and the width of the upper portion of the locked member 44 is narrower than that of the lower portion. The long hole 46a is formed substantially in the center of the free bar 46 so as to extend in the longitudinal direction of the bar 46, and the length thereof is slightly longer than the width of the lower portion of the locked member 44.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction content]

The lock releasing means 55 is, as shown in detail in FIGS. 7 and 9 to 12, the second elastic body 22 for urging the arm 57 in the direction of releasing the locked member 44 from the free bar 46, and the second elastic body 22 during operation. to release the arm 57 to the locked member 44 when engaged locks and inoperative in adjustable bar 46 to hold the arm 57 against the elastic force of the second elastic member 22 adjustable bar 46
Arm holder 58 for releasing the locked member 44 from the. Is the arm 57 standing on the bottom of the box 47 ?
One in a bracket 59 which is secured to the box 47 pin 61
Is rotatably attached via. The roller 50 faces the side edge of the arm 57. A receiving portion 57a for receiving the tip of the adjusting bolt 53 of the adjustable bar 46 is provided on one side surface of the lower end of the arm 57, and the suction plate 6 is provided on the upper portion of the arm 57.
2 is rotatably attached via a pin 63. The second elastic body 22 is a tension coil spring in this example, and is stretched between the upper end of the bracket 51 and the upper end of the arm 57. The spring 22 urges the arm 57 to rotate in a direction to push up the tip of the free bar 46. The arm holder 58 is provided with a long bolt 66 on the upper portion of an inverted L-shaped bracket 64 fixed to the box 47 so as to face the suction plate 62.
And a cap nut 67, and a compression coil spring 68 is fitted into the long bolt 66. The arm holder 58 is configured to be movable in a direction approaching the bracket 64 against the elastic force of the compression coil spring 68. Further, an electromagnet (not shown) is built in the arm holder 58, and when the electromagnet is excited, it attracts the attracting plate 62 by its magnetic force, and when the electromagnet is demagnetized, the attracting plate 62 is armed by the elastic force of the second elastic body 22. It is designed to be separated from the holder 58. Arm 57
The side edge of the roller 50 that faces the roller 50 is formed as an inclined surface 57b that approaches the locked member 44 as it goes downward. The inclined surface 57b abuts the roller 50 and the roller 50 descends to cause the suction plate 62 to move to the arm holder. The arm 57 is rotated in a direction in which it is pressed against the arm 58.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

As shown in detail in FIG. 8, the arm holder 58 is constructed so as to be remotely operated wirelessly by remote operation means 71. Remote control means 71 comprises a transmitter 72 which is placed separately from the base 12, and a receiving apparatus 73 provided in the box 47. The transmitting device 72 has a switch operating panel 72a, a wireless transmitting section 72b electrically connected to the operating panel 72a, and a transmitting antenna 72c. The receiving device 73 includes a receiving antenna 73c and a wireless receiving unit 73a.
And a drive unit 73b that is electrically connected to the receiving unit 73a and controls the arm holder 58. By turning on and off a switch (not shown) provided on the switch operation panel 72a, the arm holder 58 is switched to an operating state or a non-operating state. That is, the wireless transmitter 72b
Transmits a control signal for the arm holder 58 from the transmitting antenna 72c by operating a switch on the switch operating panel 72a. The wireless receiver 73a receives the transmitted control signal via the receiving antenna 73c, and the driver 73b controls the arm holder 58 based on this received signal.

[Procedure Amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction content]

A method of using the heavy-weight lifting material removing device thus constructed will be described with reference to FIGS . 1 to 3 and 9 to 17. First, the base 12 is lifted by the crane 31 via the upper wire 28 ( FIGS. 1 and 2).
At this time, the locked member 44 descends to the lowermost end as shown in FIG. 12, and the roller 50 of the locked member 44 moves to the arm 5
Since the suction plate 62 is pressed against the arm holder 58 by rotating 7 in the direction of the solid line arrow, the switch (not shown) of the switch operation panel 72a is turned on and the suction plate 62 is sucked by the arm holder 58. The arm 57 is prevented from rotating in the direction of the broken arrow. As shown in FIG. 3, when the base 12 is lowered onto the heavy object 11 in order to engage the lower wire 32 with the heavy object 11 to be lifted, the leg portion 34a of the sensor rod 34 protruding downward from the lower surface of the base 12 becomes a base. 12, the slider 18 is pushed into the first elastic body 21.
Falls against the elastic force of. At this time, the locked member 44
Rises as shown in FIG. In this state, as shown in FIG. 13, the lower wire 32 is connected to the wire engaging portion 11 of the heavy object 11.
The ring 32 at the tip of the lower wire 32 is inserted through the
Insert a into the mast 17.

[Procedure Amendment 11]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction content]

Next, as shown in FIG. 14, a crane 31
When the heavy object 11 is hoisted via the upper wire 28, the base 12 and the lower wire 32, the locked member 44 is locked in the long hole 46a of the free bar 46 as shown in FIG. Does not fall. Next, in FIG.
As shown, when the heavy object 11 is lowered to the predetermined place G, the lower wire 32 is loosened. If you turn off the switch in this state,
Since the arm holder 58 does not suck the suction plate 62,
The arm 57 rotates in the direction shown by the solid arrow in FIG. 9 by the elastic force of the second elastic body 22, and the inclined surface 57b of the arm 57 contacts the roller 50 (FIG. 10). At the same time, the arm 57 pushes up the tip of the swivel bar 46, so that the locked member 44 is released from the swivel bar 46, and the roller 50 begins to descend together with the locked member 44 by its own weight (FIG. 11). At this time, the roller 50 rotates the arm 57 in the direction of the broken line arrow while rolling on the inclined surface 57b of the arm 57, but the narrow portion of the upper portion of the locked member 44 is located in the elongated hole 46a of the free bar 46. Therefore, the long hole 46a of the free bar 46 does not engage with the locked member 44 in the middle of FIG.
Down to the position shown in FIG.
Is pressed against. Further, at the same time when the locked member 44 descends,
Since the slider 18 in the unloaded state rises due to the elastic force of the first elastic body 21, as shown in FIG.
The ring 32a of the item comes out of the mast and falls.

[Procedure Amendment 12]

[Document name to be amended] Statement

[Name of item to be corrected] 0025

[Correction method] Change

[Correction content]

20 to 22 show a third embodiment of the present invention. 20 to 22, the same reference numerals as those in the first embodiment denote the same parts. The lock means 103 includes a through hole 114a formed in a locked member 114 protruding into the box 47 attached to the upper surface of a base (not shown), and a lock pin 106 insertable into the through hole 114a.
The locked member 114 is provided integrally with the sensor rod 104, and protrudes upward from the upper end of the sensor rod 104. The lock pin 106 is slidably held by a pin holder 107 fixed to the box 47. The through hole 114a is the sensor rod 10 protruding from the lower end of the base.
The four leg portions 104a, 104a are formed in a position facing the lock pin 106 in a state where the four leg portions 104a, 104a are pushed into the base, that is, most of the locked member 114 projects into the box 47. The lock pin 106 has an insertion portion 106a inserted into the through hole 114a and a flange portion 106b formed at the rear end of the insertion portion 106a. A third elastic body 108 that urges the lock pin 106 to be pushed toward the locked member 114 is built in the pin holder 107. The third elastic body 108 is a compression coil spring in this example. 1
Reference numeral 04b designates the locked member 114 and the leg portions 104a, 104a.
Is a connecting portion for connecting the. The lock release means 105 has a through hole 114a through which the lock pin 106 inserted in the through hole 114a is inserted.
A guide hole 107a formed in the upper surface of the pin holder 107 extending in the longitudinal direction thereof, an operation pin 109 fixed to the lock pin 106 and protruding upward from the guide hole 107a, and an operation pin 109. And an operation bar 111 whose substantially center is locked. A locking hole 111a extending in the longitudinal direction is formed substantially in the center of the operation bar 111, and the locking hole 111a is loosely fitted in the operation pin 109. A base end of the operation bar 111 is rotatably attached to the box 47 via a pin 112, and an operation rope 113 is attached to a tip end of the operation bar 111.

[Procedure Amendment 13]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction content]

A method of using the heavy-weight lifting material removing device configured as described above will be described. When the operation rope 113 is pulled in the direction of the solid arrow in FIG. 20 with the heavy object being lifted or the heavy object being lowered to a predetermined place, the operation bar 111 rotates about the pin 112 in the direction of the broken arrow. and, (22) b Kkupin 106 in <br/> the withers withdrawing from hole 114a, the locked member 114 lowers. Since the usage other than the above is the same as that of the first embodiment, the repeated description will be omitted.

[Procedure Amendment 14]

[Document name to be amended] Statement

[Name of item to be corrected] 0027

[Correction method] Change

[Correction content]

23 to 27 show a fourth embodiment of the present invention. 23 to 27, the same reference numerals as those used in the first embodiment denote the same parts. In this example, 4 on the upper surface of the heavy object 211
Four inverted U-shaped wire engaging parts 21 near each corner
1a is fixed (FIG. 25). The base 212 is a base frame 213 formed of H-shaped steel in a substantially rectangular frame shape, and a box-shaped base body 21 fixed to the center of the upper surface of the base frame 213.
4, a cross-sectional <br/> Mengyaku hat bar mount 215 adjustable bar 246 of locking means 243 is attached to be fixed to the lower surface substantially center of the base body 214 will be described later, the bar mount 215
The fixed pulley 42 of the slider descending means 233 fixed to the lower surface of the
Is attached cross section and a U-shaped pulley mount 216. The base main body 214 is installed between two reinforcing members 213a and 213a fixed to the base main body 214 so as to be positioned in parallel to each other in the base frame 213. The two reinforcing members 213a and 213a are made of H-shaped steel.

[Procedure Amendment 15]

[Document name to be amended] Statement

[Name of item to be corrected] 0029

[Correction method] Change

[Correction content]

On the base 212, slider lowering means 233 for lowering the slider 218 by overcoming the elastic force of the first elastic body 221, and locking means 243 for temporarily fixing the slider lowering means 233 in the lowered state of the slider 218.
And a lock releasing means 255 for releasing the lock means 243.
And are provided (FIGS. 23, 24, 26 and 2).
7). The slider lowering means 233 has a sensor rod 234 whose upper end is loosely inserted into the vertical hole 217d of the mast 217 and which passes through the bar mounting base 215 and the pulley mounting base 216 and whose lower end projects downward from the lower surface of the pulley mounting base 216;
4, a movable pulley 41 that is rotatably attached to the approximate center of 4, and a fixed pulley 42 that is rotatably attached to a pulley attachment base 216.
When one end and a tension member 236 which is routed the other end attached to the pulley mount 216 through and movable pulley 41 and the fixed pulley 42 attached to the slider 218.

[Procedure Amendment 16]

[Document name to be amended] Statement

[Name of item to be corrected] 0030

[Correction method] Change

[Correction content]

In this example, the sensor rod 234 is one vertically extending flat bar which is held by the slide bearings 223 and 224 mounted on the bar mount 215 and the pulley mount 216 so as to be vertically movable. Mounting base 21
A rectangular plate 2 is provided at the lower end protruding downward from the lower surface of 6
34a is welded horizontally. The movable pulley 41 is 2 in this example.
The sensor rods 234 are attached to both sides of the sensor rod 234 which are parallel to each other and are approximately in the center (FIG. 24). There are two fixed pulleys 42 in this example, and they are mounted on the pulley mounts 216 so as to be located on both sides of the sensor rod 234. The tension member 236 is two wires in this example, and is arranged so that the slider 218 is lowered against the elastic force of the first elastic body 221 when the upper portion of the sensor rod 234 is pushed into the vertical hole 217d. To be done. The tension member 236 extends vertically in the base body 214 and is fixed to the pipe 2.
It is loosely inserted in 37 (FIGS. 23, 26 and 27).

[Procedure Amendment 17]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction content]

A rod receiving member 238, with which the lower end of the sensor rod 234 can come into contact, projects below the base 212 and is attached to the base 212 so as to be vertically movable. The rod receiving member 238 is formed by bending a steel plate in this example,
Two reinforcing members 2 so as to cover the lower surface of the pulley mount 216.
It is attached between 13a and 213a. Rod receiving member 2
Four bosses 238a extending in the vertical direction are respectively fixed to the four corners of the No. 38, and these bosses 238a are attached to the recesses 213b, 213b of the two reinforcing members 213a, 213a extending in the vertical direction. It is loosely fitted to the four shafts 213c. Shaft 2
A compression coil spring 239, which biases the boss 238a in a downward direction, is loosely fitted in the 13c. Base 212 when down the base 212 on the heavy 211, rod receiving push themselves into the vertical hole 217d of the sensor rod 234 through the member 238 by overcoming the resilient force of the first resilient body 221,
It has a mass for lowering the slider 218. Further, the upper portion of the shaft 213c is formed to have a large diameter by a predetermined length, and the upper surface of the boss 238a loosely fitted to the shaft 213c abuts on the stepped portion at the lower end of the large diameter portion 213d of the shaft 213c, so that the rod receiving portion 238 is It is possible to prevent the base 212 from approaching a predetermined distance or more.

[Procedure 18]

[Document name to be amended] Statement

[Correction target item name] 0033

[Correction method] Change

[Correction content]

The lock releasing means 255 moves the free bar 246 in a direction to release the sensor rod 234 from the free bar 246.
Is provided with two substantially L-shaped arms 257 and 257 for rotating. These arms 257 and 257 are attached to the bar mount 2
Each of them is pivotally mounted on the other 15 so as to face each other, and is rotatable in a vertical plane orthogonal to the vertical plane in which the free bar 246 rotates. The arms 257 and 257 have vertical portions 257a and 2
57a and horizontal portions 257b and 257b, respectively, and the vertical portions 257a and 257a extend upward along both outer surfaces of the base body 214, and the horizontal portions 257b and 257 are provided.
b extends so as to go under the tip of the free bar 246 (FIG. 24). Operation ropes 261 and 261 are attached to the upper ends of the vertical portions 257a and 257a, respectively, and a tension coil spring 258 is stretched between the upper ends of the vertical portions 257a and 257a. The spring 258 is inserted into a pipe 259 which extends horizontally in the base body 214 and is fixed to the bar mounting base 215 so that the vertical portions 257a and 257a are closer to each other , that is, the horizontal portions 257b and 257b are separated from the free bar 246. Energize upward.

[Procedure Amendment 19]

[Document name to be amended] Statement

[Correction target item name] 0034

[Correction method] Change

[Correction content]

Four inverted U-shaped shackle holders 226 are fixed to the upper surface of the base frame 213 near both ends of the two reinforcing members 213a and 213a. The four upper wires 2 are attached to these holders 226 via shackles 27.
The base ends of the 28 are attached, and the tip of the upper wire 228 is locked to the hook 31 a of the crane 31. Also in each of the four cornering of the lower surface of the base frame 213 is secured four U-shaped shackle holders 229, respectively, in each of the four corners near the upper surface of the base frame 213 four inverted U
The character-shaped wire guides 227 are fixed to each other. The base ends of four lower wires 232 are attached to the shackle holder 229 via the shackles 27, and a ring 232a formed at the tip of the lower wire 232 is a wire engaging portion 211a of the heavy article 211 and a wire guide. After being inserted through the 227, it is fitted into the mast 217 (see FIGS. 23 and 2).
6 and FIG. 27).

[Procedure amendment 20]

[Document name to be amended] Statement

[Correction target item name] 0035

[Correction method] Change

[Correction content]

A method of using the heavy-weight lifting material removing device configured as described above will be described. As shown in FIGS. 23 and 24, when the base 212 is lowered onto the heavy object 211 in order to engage the lower wire 232 with the heavy object 211 to be lifted, first, the rod receiving member 238 comes into contact with the upper surface of the heavy object 211, The base 212 is further lowered and the rod receiving member 2
It stops when approaching 38 to a predetermined distance. At this time, the sensor rod 234 whose lower end is in contact with the upper surface of the rod receiving member 238 is pushed up relative to the mast 217, and the upper portion of the sensor rod 234 is pushed into the vertical hole 217d of the mast 217, that is, the movement. Since the pulley 41 moves upward together with the sensor rod 234 with respect to the mast 217, the other end of the tension member 236 moves toward the slider 218.
Pull downwards. As a result, the slider 218 moves down against the elastic force of the first elastic body 221. In this state, the ring 232a at the tip of the lower wire 232 is inserted into the wire engaging portion 211a of the heavy article 211 and the wire guide 227, and then fitted into the mast 217 (FIG. 25).

[Procedure correction 21]

[Document name to be amended] Statement

[Correction target item name] 0036

[Correction method] Change

[Correction content]

Next, as shown in FIGS. 25 and 26, when the heavy object 211 is lifted by the crane 31 via the upper wire 228, the base 212 and the lower wire 232.
The base 212 rises while the rod receiving member 238 is in contact with the upper surface of the heavy object 211. As the base 212 rises, the shaft 213c attached to the recess 213b of the reinforcing member 213a also rises, and the boss 2 of the rod receiving member 238 is lifted.
38a is reaches the lower end of the shaft 213c, the rod receiving member 238 is raised together with the base 212 away from the heavy 211. At this time, since the sensor rod 234 is locked in the long hole 246a of the free bar 246, the mast 21
7 is kept pressed into the vertical hole 217d. As a result, the rod receiving member 238 separates from the lower end of the sensor rod 234.

[Procedure correction 22]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

[Procedure amendment 23]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 12

[Correction method] Change

[Correction content]

[Fig. 12]

Claims (10)

[Claims] 1. A device for removing a lower hoisting material (32,232) engaged with a heavy object (11,211) having a hoisting material engaging part (11a, 211a) from the heavy object (11,211), the base (12,212) ), The base end is attached to the base (12, 212) and the tip is the crane.
An upper hoisting material (28,228) formed so as to be able to be locked to the hook (31a) of (31), a mast (17,217) standing on the base (12,212), and a base end of which is attached to the base (12,212). A ring (32a, 232a) of a size that can be fitted into the mast (17, 217) is formed at the tip, and the lifting material engaging portion (11a, 211a) of the heavy object (11, 211) is formed.
Lower lifting material (32,232) that engages with, and a slider provided on the mast (17,217) so as to be vertically movable.
(18,218), a first elastic body (21,221) that pushes up the slider (18,218) in an unloaded state so that the upper end thereof coincides with at least the upper end of the mast (17,217), and the first elastic body (21,221) Slider lowering means (33,233) for overcoming the elastic force of the slider to lower the slider (18,218), and a locking means (43) for temporarily fixing the slider lowering means (33,233) in the lowered state of the slider (18,218). , 83,1
03,243) and lock releasing means (55,85,105,255) for releasing the locking means (43,83,103,243), and a heavy lifting device removing device. 2. A mast (17,217) is formed in a cylindrical shape, a slider (18,218) is slidably fitted in the mast (17,217), and a first elastic body (21,221) is loosely fitted in the mast (17,217). The lifting device for heavy weight lifting material according to claim 1, which is a compressed coil spring. 3. A sensor rod (3) in which slider lowering means (33, 233) is vertically movably inserted into a base (12, 212) and a lower end thereof projects downward from a lower surface of the base (12, 212).
4,104,234) and a fixed pulley (4) rotatably attached to the base (12,212).
2), one end is attached to the sensor rod (34, 104, 234) and the other end is attached to the slider (18, 218)
The constant pulley so as to lower the slider (18,218) when the (34,104,234) is pushed into the base (12,212).
The device for removing a heavy object lifting material according to claim 1, further comprising a tension material (36, 236) arranged via the (42). 4. A sensor rod (3) in which slider lowering means (33, 233) is vertically movably inserted into a base (12, 212) and a lower end thereof projects downward from a lower surface of the base (12, 212).
4,104,234), a movable pulley (41) rotatably attached to the sensor rod (34,104,234), and a fixed pulley (4) rotatably attached to the base (12,212).
2), one end is attached to the base (12, 212) and the other end is a slider
(18,218) and the sensor rod (34,104,23
The tension member (36,236) arranged through the moving pulley (41) and the constant pulley (42) so as to lower the slider (18,218) when 4) is pushed into the base (12,212). The heavy-weight lifting material removing device according to claim 1, further comprising: 5. Locking means (43, 83) are integrally inserted in a sensor rod (34) which is vertically movably inserted into a base (12) and whose lower end projects downward from the lower surface of the base (12). The lock member (44, 84) provided above the upper surface of the base (12) and the elongated hole (46a, 86a) loosely fitted in the lock member (44, 84) are provided. In this state, the swivel bar (4) mounted on the base (12) so as to be rotatable in the vertical plane and slidable in the longitudinal direction.
6,86), and is configured such that the locked member (44, 84) is locked in the elongated hole (46a, 86a) when the swivel bar (46, 86) is at a predetermined angle, The unlocking means (55,85) releases the locked member (44,84) from the swivel bar (46,86) in the direction of the swivel bar (4
The heavy-weight lifting material removing device according to claim 1, further comprising an arm (57, 87) for rotating the 6,86). 6. A second elastic body (22) for urging the arm (57) in a direction of releasing the locked member (44) from the free bar (46) by the lock releasing means (55), and the second elastic body (22) at the time of operation. The arm (57) is held against the elastic force of the second elastic body (22) and the locked member is attached to the free bar (46).
The arm holder (58) according to claim 5, further comprising: an arm holder (58) that locks (44) and releases the arm (57) when not operating to release the locked member (44) from the free bar (46). Device for removing heavy lifting materials. 7. The arm holder (58) is configured to be remotely operated by remote control means (71), the remote control means (71) being placed separately from the base (12), A transmitter (72) that wirelessly transmits a control signal to control, and the arm holder that receives a control signal from the transmitter (72) provided on the base (12).
The device for removing a heavy lifting material according to claim 6, further comprising a receiving device (73) for controlling the (58). 8. A sensor rod (104) in which a locking means (103) is vertically movably inserted into a base (12) and a lower end of which projects downward from a lower surface of the base (12).
A through hole (114a) formed in, a lock pin (106) attached to the base (12) and insertable into the through hole (114a), the lock pin (106) in the through hole (114a) A third elastic body (108) for urging the lock pin (106) against the elastic force of the third elastic body (108). The heavy-weight lifting material removing device according to claim 1, further comprising an operating lever (111) for withdrawing from the (114a). 9. A rod receiving member (238), with which a lower end of the sensor rod (234) can come into contact, projects below the base (212) and is attached to the base (212) so as to be vertically movable.
Alternatively, the device for removing the heavy lifting material according to 4 above. 10. A long hole in which a locking means (243) is vertically movably inserted into a base (212) and a lower end of which is loosely fitted to a sensor rod (234) protruding downward from a lower surface of the base (212).
(246a), which is provided with a swivel bar (246) attached to the base (212) so as to be rotatable in the vertical plane and slidable in the longitudinal direction in the loosely fitted state. ) Is at a predetermined angle, the sensor rod (234) is configured to be locked in the elongated hole (246a), and the unlocking means (255) is provided from the swivel bar (246) to the sensor rod (234). 2. The heavy-weight lifting material removing device according to claim 1, further comprising an arm (257) for rotating the swivel bar (246) in a direction of releasing the lever.