JP2002104766A - Removing mechanism for heavy object hoist material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a winding wire extractable from a heavy object by a crane of short lift, by decreasing an extracting distance from the heavy object of the winding wire to shorten its extracting time. SOLUTION: A base end ring 14a and a tip end ring 14b are formed in both ends of a winding wire 14 wound to a heavy object 13, a first lower ring 11a and a first upper ring 11b are formed in a lower/upper end of a first wire 11. The first lower ring is engaged with the base end ring, the first upper ring is engaged with a hoist device 16. A second lower ring 12a and a second upper ring 12b are formed in a lower/upper end of a second wire 12, the second lower ring is engaged with the first lower ring through a lever 23. The second upper ring of a second hoist material applying tension is engaged with a wire engaging/disengaging means 19 provided in the hoist device, this wire engaging/ disengaging means automatically releases the second upper ring when tension to the second wire is released. The tip end ring is loosely fitted to the lever.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire, a cable, a chemical fiber rope, and a chain for lifting heavy objects such as tetrapods (trade name of Tetra Co., Ltd.) used for solidifying and protecting breakwaters and seawalls. The present invention relates to a mechanism for removing a heavy lifting material from a heavy load.

[0002]

2. Description of the Related Art Conventionally, a tetrapod made of concrete block is lifted by a lifting device 6 via a main wire 1 and a wrapping wire 4 as shown in FIGS. There is known a mechanism capable of automatically removing the wrapping wire 4 when it is lowered. In this wire removing mechanism, a lower ring 1a is formed at the lower end of the main wire 1, and an upper ring 1b is formed at the upper end. A proximal ring 4a is formed at the proximal end of the winding wire 4, and a distal ring 4b is formed at the distal end. The lifting device 6 includes a crane (not shown), a crane hook 7 suspended from the tip of a beam of the crane, and a wire disengagement hook disengaged from the crane hook 7 via a wire 8 for disengagement. Means 9. The wire engaging and disengaging means 9 includes a supporting shaft 9a attached to a lower end of the engaging and disengaging wire 8, an engaging and disengaging hook 9b having a center portion rotatably supported by the supporting shaft 9a and including a base 9c and a hook body 9d. And a weight 9e provided on a base 9c of the hook removal hook 9b.

The lower ring 1a of the main wire 1 is engaged with the base ring 4a of the winding wire 4 via a shackle 5, the upper ring 1b of the main wire 1 is engaged with a crane hook 7, and further wound. The distal end ring 4b of the wire 4 is configured to be able to engage with the hook body 9d of the hook 9b.
Further, the wire engaging and disengaging means 9 rotates the engaging and disengaging hook 9b about the support shaft 9a to raise the weight 9e, and the hook body 9d
When the tension is applied, the tip ring 4b of the wound wire 4 is engaged with the hook body 9d, and when the tension on the wound wire 4 is released, the weight 9e is lowered and the hook body 9d is lowered. The hook 9b engages with the support shaft 9a in the direction in which 9d rises.
, The tip ring 4b is detached from the tip of the hook body 9d and is automatically released.

In order to lift the tetrapod 3 using the wire removing mechanism configured as described above, first, the upper ring 1b of the main wire 1 is engaged with the crane hook 7,
In addition, the wire engaging / disengaging means 9 is suspended via the engaging / disengaging wire 8. At this time, the base ring 4 a of the winding wire 4 is engaged with the lower ring 1 a of the main wire 1 via the shackle 5. In this state, the crane hook 7 is located above the tetrapod 3 and the lower part of the winding wire 4 is
Operate the crane to land on the nearby ground. Next, the winding wire 4 is wound around the tetrapod 3 and a shackle 5
After that, the tip ring 4b is engaged with the hook main body 9d of the engaging / disengaging hook 9b. At this time, since a predetermined tension is applied to the wrapping wire 4, the tip ring 4b is held in a state of being engaged with the hook body 9d (FIG. 9). By operating the crane in this state and raising the crane hook 7, the tetrapod 3 can be lifted.

When the crane is operated and the crane hook 7 is lowered so that the tetrapod 3 is located above the predetermined place, the tetrapod 3 lands at the predetermined place (FIG. 9). When the crane hook 7 is further lowered to loosen the main wire 1 and the wrapping wire 4, the hook 9b automatically rotates about the support shaft 9a by the gravity of the weight 9e, that is, the weight 9e is lowered and Since the hook body 9d rises, the tip ring 4b is automatically released from the tip of the hook body 9d and released (FIG. 10). When the main wire 1 is pulled up by raising the crane hook 7 in this state, the winding wire 4 slides in a direction to pass through the shackle 5 (FIG. 11). When the main wire 1 is further pulled up, the wound wire 4 can be pulled out from the tetrapod 3 after the wound wire 4 comes off from the shackle 5 (FIG. 12).

[0006]

However, in the above-described conventional wire removing mechanism, since the distance of pulling out the wound wire from the tetrapod is long, the time required for pulling out the wound wire is long, and the lifting height of the crane hook is high. There was a problem that becomes high. For this reason, there was a problem that the winding wire could not be pulled out from the tetrapod with a crane having a short head. Further, in the above-described conventional wire removing mechanism, since the wound wire is long, when the wound wire is pulled out from a heavy object, the probability that the wound wire is caught by a projection or the like increases, and the wound wire is pulled from the tetrapod. Friction resistance when pulling out increases. For this reason, there was also a problem that the wound wire was easily damaged. Further, in the above-described conventional wire removing mechanism, there is also a problem that the winding wire whose replacement frequency is high is long, so that the unit price of the winding wire is high and the maintenance cost is increased.

[0007] A first object of the present invention is to shorten the pulling distance of the wound hoisting material from the heavy object, thereby shortening the time required for pulling out the wound hoisting material. An object of the present invention is to provide a heavy lifting material removing mechanism capable of pulling out a wound lifting material from a heavy load. A second object of the present invention is to reduce the probability that the wound hoisting material is caught by a projection or the like when the wound hoisting material is pulled out from a heavy object by shortening the entire length of the wound hoisting material, Accordingly, it is an object of the present invention to provide a heavy lifting material detaching mechanism capable of reducing damage to the wound lifting material. A third object of the present invention is to provide a heavy lifting material detaching mechanism capable of shortening the overall length of a frequently-wound lifting material that is frequently replaced, thereby reducing maintenance costs. A fourth object of the present invention is to provide a heavy lifting material detaching mechanism capable of quickly fitting a tip ring of a wound lifting material wound around the heavy material to a lever when lifting the heavy material. It is in. A fifth object of the present invention is to provide a mechanism for removing a heavy lifting material, which can replace the second lifting material, the lever and the lever ring individually.

[0008]

The invention according to claim 1 is
As shown in FIG. 1, a base lifting ring 14 a and a distal end ring 14 b are formed at both ends, and a winding lifting material 14 wound around a heavy object 13, a first lower ring 11 a is formed at a lower end, and a first upper ring 11 b is formed at an upper end. Is formed, and the first lowering ring 11a is engaged with the base ring 14a and the first upper ring 11b is engaged with the lifting device 16.
And a second lowering 12a formed at the lower end and a second lowering 12a formed at the upper end.
A second lifting member 12 in which an upper ring 12b is formed and the second lower ring 12a is engaged with the first lower ring 11a via a lever 23; and a second upper member of the second lifting member 12 provided in the lifting device 16 and in tension. A lifting member engaging / disengaging means 19 for automatically releasing the second upper ring 12b when the ring 12b is engaged and the tension on the second lifting member 12 is released; hand,
This is a mechanism for removing a heavy lifting material, wherein the tip ring 14b is loosely fitted to the lever 23.

In the mechanism for removing a heavy object lifting material according to the first aspect of the present invention, after the heavy object 13 is lifted down to a predetermined place using the lifting device 16 and each of the lifting materials 11, 12, and 14, the first object is lifted. When the second lifting members 11 and 12 are loosened, the second upper ring 12b of the second lifting member 12 is automatically released from the lifting member engaging / disengaging means 19. When the first lifting member 11 is pulled up by the lifting device 16 in this state, the second lifting member 12 slides in a direction to pass through the inside of the tip ring 14b of the wound lifting member 14, and the first lifting member 11 is further pulled up. Then, after the second lifting member 12 has come off from the tip ring 14 b of the winding lifting member 14, the winding lifting member 14 is pulled out of the heavy object 13. As a result, the wound lifting material 1
4 can be shortened from the heavy load 13, and the entire length of the hoisting material 14 can be shortened.

The invention according to claim 2 is the invention according to claim 1, and further includes a first lifting member 11 as shown in FIG.
A lever hook 24 is attached to the first lower ring 11a, a lever ring 26 is attached to one end 23a of the lever 23, and the lever ring 26 is attached to the lever hook 24.
Characterized in that it is configured to be releasably locked to the vehicle. In the mechanism for removing a heavy lifting material according to the second aspect of the present invention, the distal end ring 14b of the wound lifting material 14 wound around the heavy load 13 is moved from the lever ring 26 side to the lever 23.
After loosely fitting on the lever, the lever ring 26 is locked to the lever hook 24, and the second upper ring 12 b of the second lifting member 12 is engaged with the lifting member engaging / disengaging means 19. Thus, the lifting operation of the heavy object 13 can be started. At this time, the distal end ring 14b of the wound lifting member 14 is loosely fitted to the lever 23 from the lever ring 26 side, so that the distal ring 14b of the wound lifting member 14 is
Can be loosely fitted quickly.

The invention according to claim 3 is the invention according to claim 1 or 2, wherein the lever ring 26 is detachably attached to one end 23a of the lever 23, as shown in FIGS. , The second lowering 12 of the second lifting member 12
a is removably attached to the other end 23b of the lever 23. In the mechanism for removing a heavy lifting material according to the third aspect, the second lowering ring 12a and the lever ring 26 of the second lifting material 12 can be removed from the lever 23, respectively.
2. The lever 23 and the lever ring 26 can be individually exchanged.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, in this embodiment, the weight 13 is a tetrapod (trade name of Tetra Corporation) made of a concrete block having legs 13a projecting from the center in all directions. A winding wire 14 is wound around the tetrapod 13, and the winding wire 14 is configured to be lifted by a lifting device 16 via the first and second wires 11 and 12. A proximal ring 14a is formed at the proximal end of the winding wire 14, and a distal ring 14b is formed at the distal end. A first lower ring 11a is formed at the lower end of the first wire 11, and a first upper ring 11b is formed at the upper end. Further, a second lower ring 12a is formed at a lower end of the second wire 12, and a second upper ring 12b is formed at an upper end.

The lifting device 16 is a crane (not shown)
And a crane hook 17 suspended from the tip of the crane beam, and wire disengaging means 19 suspended from the crane hook 17 via a disengagement wire 18.
And The wire engaging and disengaging means 19 includes a supporting shaft 19a attached to a lower end of the engaging and disengaging wire 18, an engaging and disengaging hook 19b including a base 19c and a hook main body 19d whose center is rotatably held by the supporting shaft 19a. It comprises a weight 19e provided on the base 19c of the hook removal hook 19b.

The first lower ring 11a of the first wire 11 is engaged with the proximal ring 14a of the wrapping wire 14, and the first upper ring 11b of the first wire 11 is
7 is engaged. A first shackle 21 is interposed between the first lower ring 11a and the base ring 14a. The second lowering 12 a of the second wire 12 is connected to the lever 23.
, The second upper ring 12b of the second wire 12 engages with the hook body 19d of the engaging / disengaging hook 19b, and furthermore, the lever 2
A distal end ring 14b of the wrapping wire 14 is loosely fitted in 3. A lever hook 24 is attached to the first lower ring 11 a via a second shackle 22, and a lever ring 26 is attached to one end 23 a of the lever 23. The lever ring 26 is configured to be detachably engaged with the lever hook 24.

The length of the wrapping wire 14 is set to a length that makes one round when the wire 14 is wrapped around the tetrapod 13 or slightly longer than that (FIGS. 1 and 2). In this embodiment, the length of the second wire 12 is equal to the length of the second wire 12 (the second shackle 2).
2, including a lever hook 24, a lever ring 26 and a lever 23. ) And the wrapping wire 14 (including the first shackle 21) are suspended such that the lower end of the second wire 12 is located above the lower end of the wrapping wire 14. This turns the winding wire 14 into the tetrapod 1
This is to prevent the second wire 12 loosely inserted into the distal ring 14b from being pulled under the tetrapod 13 before coming out of the distal ring 14b when the wire is pulled out of the distal ring 3.
When the winding wire 14 is pulled out from the tetrapod 13, the second wire 12
If the second wire 12 (the second shackle 22, the lever hook 24, the lever ring 26, and the lever 23) can be prevented from sinking below the tetrapod 13 before the And the winding wire 14 (including the first shackle 21) is suspended, so that the lower end of the second wire 12 is substantially at the same level (almost the same height) as the lower end of the winding wire 14. May be set to the length of the second wire 12.

As shown in FIGS. 5 to 7, the lever 23 is bent in a substantially rectangular shape, and the other end 23b of the lever 23 is formed.
Is formed thicker than one end 23a. The other end 2 of the lever 23
A taper portion 23c is provided near 3b, and the lever 23 is formed so as to be gradually thicker from the center toward the other end 23b by the taper portion 23c. A first concave groove 23d into which a lever ring 26 can be inserted is provided at one end of the lever 23.
And a pair of first through holes 23 through which the first bolt 31a can be inserted.
e and 23e are formed. The other end 23b of the lever 23
A second concave groove 23f into which the second lowering 12a of the second wire 12 can be inserted, a pair of second through holes 23g, 23g into which the second bolt 32a can be inserted, and a head of the second bolt 32a. Possible bolt insertion hole 23h and second nut 32
A nut insertion recess 23i into which b can be inserted is formed.

With the lever ring 26 inserted into the first groove 23d, the first bolt 31a is inserted through the pair of first through holes 23e, 23e, and the first nut 31b is screwed into the end of the first bolt 31a. A lever ring 26 is detachably attached to one end 23 a of the lever 23. Second groove 2
In a state where the second lowering 12a of the second wire 12 is inserted into the pair 3f, the second bolt 3 is inserted into the pair of second through holes 23g, 23g.
The second lower ring 12a is detachably attached to the other end 23b of the lever 23 by inserting the 2a and screwing the second nut 32b to the end thereof. In addition, since the head of the second bolt 32a is inserted into the bolt insertion hole 23h and the second nut 32b is inserted into the nut insertion recess 23i, the tip ring 14b of the winding wire 14 loosely fitted to the lever 23.
When is moved from the lever 23 to the second wire 12, the tip ring 14b can be prevented from being caught on the head of the second bolt 32a or the second nut 32b.

Returning to FIG. 1, the wire engaging and disengaging means 19 rotates the engaging and disengaging hook 19b about the support shaft 19a, and the weight 19
e with the hook body 19d lowered and the second upper ring 1 of the tensioned second wire 12
2b is configured to be engageable with the hook body 19d, and is configured to maintain this engaged state. Further, when the tension on the second wire 12 is released, the wire engaging / disengaging means 19 automatically rotates the engaging / disengaging hook 19b about the support shaft 19a in a direction in which the weight 19e falls and the hook body 19d rises. The second upper ring 12b is connected to the hook body 19
It is configured to be released automatically from the tip of d.

The operation of the above-configured wire removing mechanism will be described with reference to FIGS. To lift the tetrapod 13, first attach the crane hook 17
The first upper ring 11b of the wire 11 is engaged, and the wire engagement / disconnection means 19 is suspended via the engagement / disconnection wire 18. At this time, the base ring 14 a of the winding wire 14 is engaged with the first lower ring 11 a of the first wire 11 via the first shackle 21. In this state, the crane is operated so that the crane hook 17 is located above the tetrapod 13 and the winding wire 14 lands on the ground near the tetrapod 13. Next, the winding wire 14 is wound around the tetrapod 13, and the second lowering 12a of the second wire 12 is formed.
Ring for lever 26 attached to lever 23 via lever 23
After loosely inserted into the tip ring 14b of the winding wire 14,
The first wire 11 engages with a lever hook 24 attached to the first lower ring 11 a via the second shackle 22. At this time, the tip ring 14b is held in a state of being loosely fitted to the lever 23. Further, the second upper ring 12b of the second wire 12 is engaged with the hook body 19d of the hook 19b.
Engages. At this time, since a predetermined tension is applied to the second wire 12, the second upper ring 12b is held in a state of being engaged with the hook body 19d (FIG. 1). By operating the crane in this state and raising the crane hook 17, the tetrapod 13 can be lifted. Thus, the preparation for lifting the tetrapod 13 by a relatively simple operation is completed, and the lifting operation of the tetrapod 13 can be started.

When the crane is operated to lift the tetrapod 13 above the predetermined location and lower the crane hook 17, the tetrapod 13 lands at the predetermined location (FIG. 1). When the crane hook 17 is further lowered to loosen the first and second wires 11 and 12, the hook 19b is automatically rotated about the support shaft 19a by the gravity of the weight 19e, that is, the weight 19e is lowered. Also, since the hook body 19d rises, the second upper ring 12b
Is automatically released from the tip of the hook body 19d and released (FIG. 2). When the first wire 11 is pulled up by raising the crane hook 17 in this state, the second wire 12 slides in a direction to pass through the inside of the distal end ring 14b of the winding wire 14 (FIG. 3). When the first wire 11 is further pulled up, the second wire 11
After the wire 12 comes off from the tip ring 14b of the winding wire 14 (FIG. 4), the winding wire 14 is
Drawn from.

As a result, the pulling distance of the winding wire 14 from the tetrapod 13 can be shortened, so that the pulling time of the winding wire 14 can be shortened. 1
4 can be withdrawn. Further, since the winding wire 14 can be shortened, the winding wire 14 is
The probability of being caught on the protrusion between the ground 3 and the ground is reduced, and the frictional resistance when the winding wire 14 is pulled out from the tetrapod 13 is reduced, so that damage to the winding wire 14 can be reduced. On the other hand, since the entire length of the wrapping wire 14, which is frequently replaced, can be shortened, the unit price of the wrapping wire 14 is reduced, and thus the maintenance cost can be reduced.

In the above embodiment, a wire is used as the lifting member. However, a cable, a chemical fiber rope, a chain, or another lifting member may be used. In the above embodiment, the first upper ring of the first wire is engaged with the hook of the crane. However, the first upper ring of the first wire may be engaged with the support shaft of the wire engaging and disengaging means. In the above embodiment, the concrete block is made of a tetrapod made of a concrete block as a heavy object. However, a cubic or rectangular concrete block, a fish reef, a caisson (submersible box), a metal or concrete structure, or other It may be heavy. Here, the heavy object includes a small heavy object in addition to a large heavy object. In the above embodiment, one tetrapod is lifted by the lifting device. However, two or three or more heavy objects such as tetrapods may be lifted at the same time.

In the above embodiment, the relatively small tetrapod is lifted by using the winding wire and the first and second wires one by one (so-called slanting suspension). When a heavy object such as a heavy tetrapod is lifted, the winding wire, the first and second wires are each lifted using the same number of plural wires (for example, two wires, four wires, and six wires). Good (so-called butterfly hanging, etc.).
In the above-described embodiment, one end of the lever is attached to the second shackle via the lever ring and the lever hook. However, as shown in FIG. 8, one end of the lever 23 is attached directly to the second shackle 22. Is also good.

Further, in the above embodiment, as the wire engaging / disengaging means, the support shaft attached to the lower end of the engaging / disengaging wire,
Japanese Unexamined Patent Publication No. 2000-153 discloses an example in which a hook and a hook are provided at the center of the base and a hook and a main body, and a weight provided at the base of the hook and the hook.
A device disclosed in Japanese Patent Application Laid-Open No. 986 or Japanese Patent Application Laid-Open No. 7-25578 may be used. The former (JP-A-2000-1539)
No. 86), a first upper ring of a first wire is engaged with a base, a second upper ring of a second wire is fitted into a mast, and an upper end of a slider provided on the mast so as to be vertically movable. The slider is pushed up by the elastic body for the slider at least in a state of no load so that it coincides with at least the upper end of the mast, the slider lowering means lowers the slider, the locking means fixes the slider in the lowered state, and the unlocking means further moves the slider. It is a heavy lifting material removal device configured to release the fixing. In this device, a sensor rod inserted vertically into the base communicates with the slider via a tension member, a distal end of a handle pivotally attached to the base is locked to the sensor rod, and a base end is provided outside the base. Is provided. Also, the slider is lowered by raising the sensor rod when the handle is operated.

The latter (the device disclosed in JP-A-7-25578) has an upper wire provided between a base and a hook of a crane, a first upper ring of a first wire is attached to the base, and a second wire is provided. Is an apparatus for removing a heavy lifting material fitted into a mast erected on a base. In this device, the slider, which is slidably fitted to the mast, is pushed up by the first elastic body so that its upper end at least coincides with the upper end of the mast in a no-load state, and the slider lowering means is provided with an elasticity of the first elastic body. It is configured to overcome the force and lower the slider. Further, the slider lowering means is temporarily fixed while the locking means is lowered, and the lock releasing means releases the locking means.

[0026]

As described above, according to the present invention, the first lower ring of the first lifting member is engaged with the base ring of the wound lifting member, and the first upper ring is engaged with the lifting device. ,
The second lowering of the second lifting member engages with the first lowering via the lever, and the lifting member engaging / disengaging means with which the second upper ring of the tensioned second lifting member engages is connected to the second lifting member. When the tension is released, the second upper ring is automatically released, and the tip ring is loosely fitted on the lever. Therefore, when the heavy object is lowered to a predetermined place and the first and second lifting members are loosened, the second upper ring is loosened. (2) The second upper ring of the lifting member is automatically released from the lifting member engaging / disengaging means. In this state, when the first lifting member is pulled up by the lifting device, the second lifting member comes off the tip ring of the wound lifting member. After that, the wound lifting material is pulled out of the heavy object. As a result, the pulling distance of the wound lifting material from the heavy object can be shortened, so that the pulling time of the wound lifting material can be shortened, and the winding lifting material can be pulled out of the heavy object by the lifting device having a short lift. be able to. In addition, by shortening the entire length of the wrapped hoisting material, the probability of the wrapped hoisting material being caught on a projection or the like when the wrapped hoisting material is pulled out of a heavy object can be reduced. Can be reduced. On the other hand, the maintenance cost can be reduced by shortening the entire length of the wrapped lifting material that is frequently replaced.

Further, if a lever hook is attached to the first lowering of the first lifting member, a lever ring is attached to one end of the lever, and the lever ring is detachably engaged with the lever hook, the weight is increased. By loosely fitting the tip ring of the wound lifting material wound around the object from the lever ring side to the lever, the tip ring can be quickly loosely fitted to the lever. Further, if the lever ring is detachably attached to one end of the lever and the second lower ring of the second lifting member is detachably attached to the other end of the lever, the second lifting member can be removed.
Since the lower ring and the lever ring can be detached from the lever, the second lifting member, the lever and the lever ring can be individually replaced, and maintenance costs can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view showing a state immediately before lifting a tetrapod according to a first embodiment of the present invention using a lifting device and each wire and immediately after lowering the tetrapod to a predetermined place.

FIG. 2 is a view showing a state in which the first and second wires are loosened and the second
FIG. 2 is a front view corresponding to FIG. 1 and showing a state in which the upper ring is detached from the wire engaging / disengaging means.

FIG. 3 is a diagram showing a state in which a first wire is pulled up by a lifting device and a second wire is pulled up;
FIG. 2 is a front view corresponding to FIG. 1, showing a state in which the wire is sliding in a direction to pass through a distal end ring of the wound wire.

FIG. 4 further raises the first wire by a lifting device,
The front view corresponding to FIG. 1 which shows the state which the 2nd wire pulled out from the front-end ring of the winding wire.

FIG. 5 is an enlarged view of a main part showing a lever and wires around the lever.

FIG. 6 is a sectional view taken along line AA of FIG. 5;

FIG. 7 is a sectional view taken along line BB of FIG. 5;

FIG. 8 is a front view corresponding to FIG. 1 showing a second embodiment of the present invention.

FIG. 9 is a front view showing a state immediately before the tetrapod of the conventional example is lifted by using the lifting device and each wire and immediately after being lowered to a predetermined place.

10 is a front view corresponding to FIG. 9, showing a state in which the main wire and the winding wire are loosened and the winding upper ring of the winding wire is detached from the wire engaging / disengaging means.

FIG. 11 is a front view corresponding to FIG. 9, showing a state in which the main wire is pulled up by the lifting device and the wound wire is sliding in a direction to pass through the inside of the shackle.

FIG. 12 The main wire is further pulled up by a lifting device,
FIG. 10 is a front view corresponding to FIG. 9, showing a state in which the winding wire has come off the shackle.

[Explanation of symbols]

 11 1st wire (1st lifting material) 11a 1st lowering 11b 1st upper ring 12 2nd wire (2nd lifting material) 12a 2nd lowering 12b 2nd upperring 13 Tetrapod (heavy material) 14 Winding wire ( 14a Base end ring 14b Tip ring 16 Lifting device 19 Wire engaging / disengaging means (Hanging material engaging / disengaging means) 23 Lever 23a One end of lever 23b The other end of lever 24 Hook for lever 26 Ring for lever

Claims (3)

[Claims] 1. A proximal ring (14a) and a distal ring at both ends.
(14b) formed and wound around a heavy load (13); a first lifting ring (11a) formed at the lower end; and a first upper ring (11b) formed at the upper end. The lower ring (11a) is engaged with the base ring (14a) and the first upper ring (11b)
A first lifting member (11) that engages with the lifting device (16), a second lower ring (12a) is formed at the lower end, and a second upper ring (12b) is formed at the upper end. A second lifting member (12) engaged with the first lowering (11a) via a lever (23), and a second lifting member (12) provided on the lifting device (16) and being tensioned; 2 upper ring (12b) is engaged and the second
The lifting member engaging / disengaging means (1) for automatically releasing the second upper ring (12b) when the tension on the lifting member (12) is released.
9), wherein the tip ring (14b) is loosely fitted to the lever (23). 2. A first lowering (11) of a first lifting member (11).
A lever hook (24) is attached to a), a lever ring (26) is attached to one end (23a) of the lever (23), and the lever ring (26) is detached from the lever hook (24). 2. The heavy lifting material removing mechanism according to claim 1, wherein the mechanism is configured to be locked as much as possible. 3. A lever ring (26) is connected to one end of a lever (23).
The lever according to claim 1 or 2, wherein the second lifting member (12) is detachably attached to the other end (23b) of the lever (23). Heavy lifting material removal mechanism.