JP2009137739A - Auxiliary tool for slinging work - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively prevent wire ropes from being close to a lifted cargo center when performing a slinging work to enable the safe and efficient slinging work. <P>SOLUTION: This auxiliary tool 21 is provided with two mutually parallel arms 22 and a connecting member 23 for connecting the two arms 22. The connecting member 23 is constituted of a pair of member pieces 24 connected by a hinge at a center part. The slinging work is performed by mounting the auxiliary tool 21 on an upper surface of the lifted cargo by aligning to the lifted cargo center C. When a cargo is lifted and the wire ropes 2 are stretched, both the right and left side arms 22 prevent the right and left wire ropes 2 from being close to the lifted cargo center C side, and thereby a center of gravity of the lifted cargo 1 can be rightly suspended. When the connecting member 23 is folded into a chevron-shape (reverse chevron-shape) at the hinge-connected part 25 in stretched states of the wire ropes 2 just before or just after dynamic lift off of the lifted cargo, the auxiliary tool 21 can be extracted in a lifted cargo width direction and can be easily removed. A work for preventing the wire ropes 2 from being close to the center can be extremely easily and efficiently performed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention mainly relates to a slinging aid for preventing a wire rope (hanging wire rope) from being near the center when a long slung load is slung with a wire.

As shown in FIG. 11, for example, when a long suspended load 1 is hung with a wire, in general, the wire rope 2 is hung on both sides sandwiching the longitudinal center (suspended load center) C of the suspended load 1 (under the suspended load 1). ) And hook the retaining ring portions at both ends of each wire rope 2 on the hook 3 of the crane. The suspended load 1 in the illustrated example is a suspended load obtained by bundling a plurality of steel pipes with a bundling hoop 1a.
In this case, the center position between the two wire ropes 2 needs to coincide with the suspended load center C, and when lifting, it is necessary to balance so that the lifting force by both wire ropes 2 acts correctly on the center of gravity of the suspended load. . Reference numeral 4 denotes a tree (crest) on which a suspended load is placed.
However, in the case of a mere long suspended load 1 as shown in the figure, when tension is generated in the wire rope 2 during lifting, the wire rope 2 is easily shifted to the suspended load center C side as indicated by an arrow, and both wire ropes The center between the two is disengaged from the suspended load center, and the left and right balance of the suspended load is lost and becomes unstable.
Therefore, the slinging worker usually works with both hands and one leg until the wire rope is stretched so that the wire rope 2 does not slip. However, when the hoist and sling are performed by one person, the hoist operation is performed. Work is not only efficient, but also unsafe work.

As shown in FIG. 12, in order to improve such a problem near the center of the wire rope, a U-shaped metal fitting 5b is provided in one end and a U-shaped metal fitting 5b is provided in the outer cylinder 7 provided with a spring 6 in one end. A wire staking jig provided with a screw 10 that slidably fits the inner cylinder 8 provided with an outer cylinder 7 and an inner cylinder 8 that detachably engage with each other to form an extendable rod-like body 9. There is a tool 11.
When wire staking work is performed using the staking jig 11, the U-shaped metal fittings 5 a and 5 b at both ends of the rod-like body 9 are applied to the left and right wire ropes 2, and the left and right wire ropes 2 are moved inward. It is to prevent. Further, the length of the entire jig is adjusted by causing the inner cylinder 8 receiving the reaction force of the spring 6 to appear and retract and engage with the screw 10.
Japanese Utility Model Publication No. 5-24676

12 is engaged with the wire rope by the U-shaped metal fittings 5a and 5b at both ends of the rod-like body 9, but the U-shaped fittings 5a and 5b at both ends of the rod-like body 9 are easily shaken. The operation of engaging the thin wire rope 2 is not always easy and the workability is not good.
In addition, the U-shaped metal fittings 5a and 5b at both ends of the slinging jig 11 are likely to come off even when engaged with the wire rope when the wire rope is loose. Therefore, the engagement is maintained until the wire rope is stretched. It seems that some kind of treatment is required, and workability is not good in that respect.
Further, when removing the slinging jig 11 after the wire rope is stretched, the screw 10 is loosened and the inner cylinder 8 is further pushed in and removed. At that time, the wire rope is stretched and the inner cylinder 8 has the spring 6 attached thereto. Since the reaction force is acting, it is considered that a considerably large pushing force is required to push the inner cylinder 8 against the reaction force of the spring 6. In that respect, workability is not good.
In addition, when the slinging jig 11 is used only on one side in the width direction of the suspended load 1 (when it is used only between the left and right wire ropes 2 on the front side of the paper in FIG. 11), stable center deviation prevention is possible. There are also things you can't do. On the other hand, when used on both sides in the width direction of the suspended load 1, in order to engage the rod-shaped slinging jig 11 with the wire rope 2, the operator is on the opposite side of the suspended load 1 (the back side of the page in FIG. 11). Since there are many cases where it is necessary to go around, the workability is not good in this respect.

  The present invention was made in order to eliminate the above-described conventional drawbacks, and mainly when a long slinging load is hung by wire, it can effectively prevent the wire rope from being near the center, and can be safely hung. An object of the present invention is to provide a slinging assisting tool that is easy to work when using the slinging assisting tool and that can efficiently perform a wire slinging operation.

  The staking aid of the present invention that solves the above problems includes two arms that are parallel to each other and a connecting member that connects the two arms, and the connecting member is generally foldable into a mountain shape. It consists of a pair of member piece hingedly connected in the center part.

  Claim 2 is the auxiliary tool for slinging according to claim 1, wherein the wire rope detachment preventing protrusions for preventing the wire ropes arranged on the outer sides of both arms from coming off the arms are provided at both ends of each arm. It is provided.

  According to a third aspect of the present invention, in the sling assisting tool according to the first or second aspect, when a compressive force in the longitudinal direction of the connecting member is applied to the connecting member by the stretched wire rope, the connecting member is folded into a mountain shape at the hinge connecting portion. Folding prevention means is provided to prevent this.

  According to a fourth aspect of the present invention, in the sling assisting tool according to any one of the first to third aspects, a connecting member length adjusting means for adjusting a horizontal length of the connecting member is provided.

  According to a fifth aspect of the present invention, in the auxiliary tool for slinging according to the fourth aspect, each member piece of the connecting member includes a cylindrical body and a rod that is slidably fitted into the cylindrical body, and forms an extendable rod-shaped body. An engagement means for detachably engaging the cylindrical body and the rod is provided.

  A sixth aspect of the present invention relates to the sling support tool according to the fourth aspect, wherein the connecting member is hinged at one end to the middle position of each member piece and the other end is hinged to each other, and the four-joint link together with a part of each member piece. A pair of isometric links, and a vertical rod attached to the hinge connecting portion of the links through the hinge connecting portions of the member pieces, the vertical rod and the hinge connecting portions of the member pieces being connected to each other Engagement means for releasably engaging is provided.

The sling support tool of the present invention is placed on the top surface of the load in accordance with the load center (longitudinal direction center of the load), and two wire ropes are hung on the outer sides of the left and right arms of the sling support tool. Hang the wire rope on the crane hook, etc., and pull up both wire ropes, both wire ropes slightly approach the suspended load center side as the tension is applied, but they hit the outer surfaces of the left and right arms. Therefore, the left and right wire ropes can be prevented from approaching the suspended load center.
As a work to prevent the wire rope center from being slung in this slinging work, it is only necessary to place a slinging aid on the hanging load center, so the work can be done very easily and quickly, and the workability is extremely high. It is good.
Further, if the length of the arm is sufficiently longer than the width of the suspended load (horizontal dimension in the direction orthogonal to the longitudinal direction of the suspended load), there is almost no possibility that the wire rope will come off the arm.

When removing the sling support tool after the wire rope is stretched, fold the connecting member that connects the left and right arms into a mountain shape (reverse V shape) at the middle hinge connection, and then pull it out in the direction of the suspended load. And remove it.
In this case, the auxiliary tool folded in a mountain shape is completely separated from the wire rope and is not subjected to any force, so the auxiliary tool can be pulled out in the direction of the suspended load without requiring any special force. Is very simple, and the workability is also good in this respect. In addition, since the direction of the force applied when folding into a mountain shape is perpendicular (upward) to the compressive force in the longitudinal direction (horizontal direction) of the connecting member received from the stretched wire rope, no force is required for folding.
Moreover, when the auxiliary tool is placed on the upper surface of the suspended load, the left and right arms restrict the center of the wire rope on both sides in the suspended load width direction, so that stable center displacement prevention is possible. Moreover, since it is not necessary to turn to the opposite side of the suspended load width direction as an operation for regulating the side of the wire rope on both sides of the suspended load width direction, the workability is also good in this respect.

  As described above, if the length of the arm is made sufficiently longer than the width of the suspended load, there is almost no fear that the wire rope will come off from the arm. Providing the protrusion can prevent the wire rope from coming off from the arm without giving a particular margin to the length of the arm.

  As described above, the direction of the force applied when folding the slinging aid into a mountain shape is perpendicular to the compressive force in the longitudinal direction of the connecting member received from the stretched wire rope. There is basically no fear that the auxiliary tool will be folded by force, but if the folding prevention means is provided as in claim 3, the fear can be completely eliminated.

  When the connecting member length adjusting means for adjusting the length of the connecting member is provided as in the fourth aspect, it is possible to freely cope with an appropriate suspension span with respect to the entire length of the suspended load.

  According to the fifth or sixth aspect, the length of the connecting member can be easily and reliably adjusted with a simple configuration.

  Hereinafter, embodiments of the slinging aid of the present invention will be described with reference to FIGS.

FIG. 1 shows a slinging aid 21 according to an embodiment of the present invention, in which (A) is a plan view, (B) is a front view, and (C) is a left side view. FIG. 2 illustrates a situation where a wire slinging work is performed using the sling assisting tool 21 of FIG. 1, and before the slinging load 1 is lifted when the slinging assisting tool 21 is placed on the slinging load 1. FIG.
The sling assisting tool 21 includes two arms 22 that are parallel to each other and a linear connecting member 23 that connects the two arms 22. As shown in FIGS. 3, 4, etc., the connecting member 23 includes a pair of member pieces 24 that are hingedly connected at the center thereof so as to be foldable into a mountain shape (reverse V shape). The hinge connection is indicated by 25.
In the embodiment, a C-shaped steel (lightweight grooved steel with a lip) is used for the arm 22, and a square steel pipe is used for the member piece 24 of the connecting member 23. However, the material to be used is not limited to this, and can be appropriately selected.
The wire ropes 2 to prevent the wire ropes 2 arranged on the outer sides of the left and right arms 22 in FIG. 2 from coming off from the arms 22 at both ends of each arm 22 in the suspended load width direction (left and right direction in FIG. 5). A prevention protrusion 26 is provided. The protrusion 26 for preventing wire rope detachment in the illustrated example is obtained by welding and fixing both ends of a flat bar or bar steel curved in an arc shape to both ends of the arm 22.
A handle 27 is attached to one member piece 24 of the connecting member 23.

When staking work is performed using the above-described slinging aid 21, the slinging aid 21 is adjusted to a suspended load center (center in the longitudinal direction of the suspended load 1) C as shown by the solid lines in FIGS. 2 and 4. Place on top of suspended load.
Next, the two wire ropes 2 are hung on the suspended load 1 on the outer sides (the left and right outer sides in FIGS. 2 and 4) of the left and right arms 22 of the sling assisting tool 21 (under the suspended load). Multiply).
Next, each wire rope 2 is hung on the hook 3 of the crane. FIG. 2 shows the state at this stage, where the wire rope 2 is not tensioned and is loose.
Next, when the wire rope 2 is pulled up with the hook 3, both the wire ropes 2 slightly move toward the suspended load center C as the tension acts, but the contact with the outer surfaces of the left and right arms 22 is restricted, so The wire rope 2 can be prevented from approaching the suspended load center C.

Unlike the conventional jig 11 shown in FIG. 12, the work for preventing the wire rope center from being slung in this sling work is simply a slack assisting tool 21. Is only required to be placed in accordance with the hanging load center, so that the work can be performed very easily and quickly, and the workability is very good.
Further, if the length of the arm 22 is made sufficiently longer than the width of the suspended load 1 (the horizontal dimension in the direction orthogonal to the longitudinal direction of the suspended load, ie, W in FIG. 5), the wire as in the conventional jig 11 is used. Unlike the method that requires some kind of care to maintain the engagement between the U-shaped metal fitting 5a and the wire rope 2 until the rope is stretched, there is almost no possibility that the wire rope 2 is detached from the arm 22.

Next, when the wire rope 2 is further stretched, the suspended load 1 is lifted, but at a time immediately before the suspended load is lifted or slightly lifted (ground cutting), etc. (FIGS. 3 and 5 show this time point). Remove the auxiliary tool 21. In FIG. 5, reference numeral 13 denotes a member arranged at one place in the longitudinal direction of the suspended load between two bundled loads in order to stabilize the load form.
In this case, the connecting member 23 connecting the left and right arms 22 is folded into a mountain shape (inverted V shape) at the intermediate hinge connecting portion 25 (FIGS. 3 and 5 (B)), and then this is shown in FIG. Pull it out in the direction of the suspended load as shown in (c) and remove it.
In this case, the slinging tool 21 folded in a mountain shape is completely separated from the wire rope 2 and is not subjected to any force, and therefore the assisting tool 21 is pulled out in the suspended load width direction without requiring any force. It can be removed and is very easy to remove.
The direction of the force applied when the connecting member 23 is folded into a mountain shape (in the direction of arrow A in FIG. 4) is the compression in the connecting member longitudinal direction (in the direction of arrow B in FIG. 4) received from the wire rope 2 stretched by the connecting member 23. Since it is perpendicular to the force, it does not require any special force for folding.

FIG. 3 shows the stage where the suspended load 1 is grounded. In this state, a large tension acts on the wire rope 2, and the wire rope 2 is in close contact with the suspended load with a strong force. Never stop by. Therefore, it is possible to lift the suspended load 1 in a state where the centers of the left and right wire ropes 2 are correctly aligned with the suspended load center C, and a safe slinging operation can be performed.
Further, when the auxiliary tool 21 is placed on the upper surface of the suspended load 1, the left and right arms 22 regulate the center of the wire rope 2 on both sides in the suspended load width direction (in the right and left portions of the wire rope 2 in FIG. 5). Therefore, unlike a conventional jig 11 that acts only on one side in the suspended load width direction, one jig can be stably prevented from shifting toward the center.
Also, as a work for regulating the deviation of the wire rope on both sides of the suspended load width direction, it is necessary to turn to the opposite side of the suspended load width direction, unlike the conventional jig 11 which needs to be turned to the opposite side of the suspended load width direction. Since there is no, workability is also good in this respect.

Meanwhile, hanging as a balance a load well hanging method, as shown in FIG. 10 (b), there is a method of using the balance 15, when hanging a load using the balance 15, the hanging height H ₁ is the balance 15 Only extra height h is required.
In contrast, if the scheme can be subjected to the wire rope 2 directly crane hook 3 as rigging for aid 21 of the present invention (FIG. 10 (b)), hanging height H _2, the wire What is necessary is just to ensure the dimension only of the rope 2, and it can hold down low.

  In the above embodiment, the wire rope detachment preventing protrusion 26 is provided. However, when the arm 22 has a sufficient length, the wire rope detachment preventing protrusion 26 is not provided. It is possible to prevent the rope 2 from coming off the arm 22.

  FIG. 6 shows an embodiment in which a folding preventing means 29 is provided on the connecting member 23. In the vicinity of the hinge connecting portion 25 of the connecting member 23, the anti-folding means 29 is attached to the shaft 29 a fixed to one member piece 24 so that the base end of the hook 29 b can rotate, and the other member piece 24 has the hook 29 b of the hook 29 b. The locking pin 29c for hooking the tip locking portion is fixed.

As described in the first embodiment, the direction of the force applied when the connecting member 23 is folded in a mountain shape is perpendicular to the compressive force in the longitudinal direction (horizontal direction) of the connecting member received from the wire rope 2 stretched by the connecting member 23 (upward). Therefore, there is basically no possibility that the connecting member 23 is folded by the compressive force in the connecting member longitudinal direction received from the stretched wire rope.
However, when the anti-folding means 29 is provided as in this embodiment and the tip engaging portion of the hook 29b is hooked on the engaging pin 29c until the suspended load is grounded, the connecting member 23 becomes the hinge connecting portion. The possibility of being folded at 25 can be completely eliminated.

FIG. 7 shows a slinging aid 31 according to another embodiment of the present invention. This sling support tool 31 is obtained by connecting the left and right arms 22 with two connecting members 33A and 33B. The two connecting members 33 </ b> A and 33 </ b> B are in symmetrical positions across the longitudinal center of the arm 22. Moreover, the handle 37 of an Example is a thing which spanned the rod between the two connection members 33A and 33B. The other points are substantially the same as those of the embodiment of FIGS.
The structure of the slinging auxiliary tool 31 of this embodiment is suitable for application when the width of the suspended load (W dimension in FIG. 5) is wide.

FIG. 8 shows an embodiment of a slinging aid provided with connecting member length adjusting means for adjusting the length of the connecting member.
The connecting member 43 of the slinging auxiliary tool 41 of this embodiment includes a member 45 that is hinge-connected by the hinge connecting portion 25 and a rod 45 that is slidably fitted into the tube 45. In addition, there is provided engaging means for detachably engaging the cylindrical body 45 and the rod 46, which form an extendable rod-like body.
In this embodiment, as the engaging means, a plurality of pin holes 46 a are formed at intervals in the rod 46, a pin hole 45 a is formed at, for example, one location of the cylinder 45, and the rod 46 is inserted into the pin hole 45 a of the cylinder 45. An appropriate pin hole 46a is aligned, an engagement pin 48 is inserted, and the cylindrical body 45 and the rod 46 are engaged to fix the length.
The point that both member pieces 44 are connected by the hinge connecting portion 25 is the same as that in the above embodiment.
In addition, in FIG. 8, it has shown in the state folded in the mountain shape.

  The slinging support tool 41 of this embodiment can adjust the distance between the left and right arms 22 by adjusting the length of the connecting member 43, so that one slinging assisting tool 41 can cope with various hanging spans. .

FIG. 9 shows another embodiment of the slinging aid provided with the connecting member length adjusting means. The connecting member 53 in the slinging assisting tool 51 has two equal-length member pieces 54 hinge-connected by a hinge connecting portion 55, but links 61 are respectively connected to the intermediate positions of the member pieces 54 by hinge connecting portions 62. The other ends of both links 61 are hinge-connected to each other by a hinge connecting portion 63.
As a result, a four-bar link is formed by the upper portion and both links 61 in FIG.
Then, a rod 66 is welded and fixed perpendicularly to the upper surface of the frame body 63a constituting the hinge connecting portion 63 of the links 61, and the vertical rod 66 penetrates the frame body 55a constituting the hinge connecting portion 55 of the member pieces 54. The engaging means 67 is provided for releasably engaging the vertical rod 66 and the frame 55a of the hinge connecting portion 55 with each other.
The engaging means 67 has a pin hole 55b in the frame 55a, a plurality of pin holes 66a at intervals in the vertical rod 66, and an appropriately selected pin of the pin hole 55b of the frame 55a and the vertical rod 66. The holes 66a are aligned, and the engaging pins 68 are inserted to engage the frame body 55a and the vertical rod 66 to fix the length. A cross-sectional view of the hinge connecting portion 55 between the member pieces 54 is shown in FIG.

  In the staking aid 51 of this embodiment, the length of each member piece 54 does not change, but by changing the engagement position between the vertical rod 66 and the frame 55a of the hinge connecting portion 55, the two hinge connecting portions By adjusting the distance between 55 and 63, the distance between the arms 52 fixed to both ends of the member piece 54, that is, the length of the connecting member 51 in the horizontal direction can be adjusted, and the suspension span is appropriately handled. Length. Therefore, it is possible to deal with various hanging spans with one slinging aid 51.

BRIEF DESCRIPTION OF THE DRAWINGS The auxiliary | assistant tool for slinging of one Example of this invention is shown, (A) is a top view, (B) is a front view, (C) is a left view. FIG. 2 is a diagram illustrating a situation in which a wire staking operation is performed using the staking aid of FIG. 1, and is a diagram of a stage before the suspended load is lifted when the staking aid is placed on the suspended load. FIG. 3 is a view showing a state in which the slinging aid is folded immediately before or immediately after the suspended load is ground (to lift the load slightly). It is a figure which expands and demonstrates the state of FIG.2 and FIG.3. It is the figure seen from the suspended load longitudinal direction explaining the state of FIG. 2, FIG. The Example which provided the folding prevention means in the connection member is shown, and it is a figure of the hinge connection part vicinity of a connection member. The other Example of the auxiliary tool for slinging of this invention is shown, (A) is a top view, (B) is a front view, (C) is a left view. It is a figure which illustrates typically the connection member length adjustment means in the case of adjusting the length (corresponding to a suspension span) of the connection member in the auxiliary tool for slinging. It is a figure which illustrates typically the other example of the connection member length adjustment means in the case of adjusting the length (corresponding to a suspension span) of the connection member in the auxiliary tool for slinging. It is a figure explaining the advantages of the sling support tool of the present invention in comparison with a balance-type lifting tool, (a) using the sling support tool of the present invention, (b) using a balance-type lifting tool Indicates the case where It is a figure explaining the problem in the case of the conventional general wire staking work. It is explanatory drawing of the jig | tool for conventional staking.

Explanation of symbols

1 Suspended load 2 Wire rope 3 (Crane) hook 4 Jinki (cradle)
21, 31, 41, 51 Climbing auxiliary tool 22, 52 Arm 23, 33 </ b> A, 33 </ b> B, 43, 53 Connecting member 24, 34, 44, 54 Member piece 25, 55 Hinge connecting part 26 Protrusion part 27 for preventing the wire rope from coming off , 37 Handle 29 Folding prevention means 29a Shaft 29b Hook 29c Locking pin 45 Cylindrical body 46 Rod 45a, 46a Pin hole 48 Engaging pin 61 Link 62 Hinge connecting part 63 (between member piece and link) Hinge (between links) Connection part 63a Frame 55a of hinge connection part 63 Frame 55b of hinge connection part 55 Pin hole 66 (of frame 55a) Vertical rod 66a Pin hole 67 (of vertical rod) Engagement means 68 Engagement pin

Claims (6)

  The arm includes two arms that are parallel to each other and a connecting member that connects the two arms, and the connecting member is formed of a pair of member pieces that are hingedly connected to each other at a central portion so that the connecting member can be folded in a mountain shape. A sling aid characterized by.   2. The sling according to claim 1, wherein protrusions for preventing the wire rope from coming off from the arms are provided at both ends of each arm to prevent the wire ropes arranged on the outer sides of the arms from coming off the arms. Auxiliary tool.   The connecting member is provided with a folding preventing means for preventing the connecting member from being folded in a mountain shape at the hinge connecting portion when a compressive force in the longitudinal direction of the connecting member is applied to the connecting member. The auxiliary tool for slinging according to claim 1 or 2.   The auxiliary tool for slinging according to any one of claims 1 to 3, further comprising a connecting member length adjusting means for adjusting a horizontal length of the connecting member.   Each member piece of the connecting member includes a cylindrical body and a rod that is slidably fitted into the cylindrical body, and the cylindrical body and the rod that form an extendable rod-shaped body are detachably engaged with each other. 5. The sling assisting tool according to claim 4, further comprising an engaging means for allowing the sling.   The connecting member is provided with a pair of equal-length links, one end of which is hinge-connected to the middle position of each member piece and the other end is hinge-connected to form a four-bar link with a part of each member piece. It has a vertical rod that passes through the hinge connecting portions of the links and is attached to the hinge connecting portions of the links, and has an engaging means for detachably engaging the vertical rod and the hinge connecting portions of the member pieces. The auxiliary tool for slinging according to claim 4 characterized by the above-mentioned.

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