JP2007070083A - Hoisting method and device of block - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device which can eliminate the need of a manual work in installation of a wire to a block, be applicable in a wide range responding to blocks of various shapes while the shape of the block is not specified, and can stably hoist the block regardless of its shape. <P>SOLUTION: At least three elastic guide arms 7 radially spreading toward lower end and a tightening ring 10 thorough which the guide arms 7 pass are hung, and the tightening ring 10 is moved to reduce spaces between the guide arms 7. After at least two hanging wires 8 which are hung down from lower end parts of the guide arms 7 in a U-shape is hooked to a block B1, the block B1 is hoisted together with the guide arms 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a lifting method and apparatus for lifting a heavy block such as a wave-dissipating block using a crane or the like.

  Conventionally, when lifting a quadruped wave-dissipating block called Tetrahod (registered trademark), the method generally shown in FIG. 1 or FIG. 2 has been used.

  In the case of FIG. 1, a hanging wire 101 having suspension rings 101 a formed at both ends is hung on the wave-dissipating block 102 so as to pass through the tip of one leg part 102 a of the four legs of the wave-dissipating block 102. Then, the suspension rings 101a at both ends are positioned so as to overlap the peripheral surface of another leg portion 102b, and the suspension rings 103a at both ends of the strap wire 103 are lifted by passing the strap wires 103 through the suspension rings 101a at both ends. It is hung on the hook 105 at the lower end of 104 and lifted by the lifting wire 104.

  In the case of FIG. 2, the auxiliary wire 106 is also used and arranged on the peripheral surface of another leg portion 102b, and two suspension rings 106a at both ends and two suspension rings 101a at both ends of the suspension wire 101 are provided. The strap wire 107 is connected by the hanging metal fitting 107a, and is lifted by the lifting wire through the two strap wires 107 as in the case of FIG.

  However, in such a conventional method, the workability of attaching the wire to the wave-dissipating block is poor. Therefore, for the purpose of improvement, Patent Document 1 (Japanese Patent Application Laid-Open No. 8-333078) discloses as shown in FIG. A lifting device is disclosed.

  The suspension device includes a ring 3, left and right hinge plates 4, left and right hoisting arms 5, a contact plate 6, left and right suspension wires 7, parallel suspension fittings 8, and auxiliary wires 9. When the ring 3 is detachably fitted to the leg portion 2B standing upward from the wave-dissipating block 2 in a horizontal state from above, the ring 3 contacts the position of the third of the taper of the leg portion standing upward. The left and right short shafts 3A, 3A are projected outwardly from the left and right portions of the ring 3 in the horizontal direction. The left and right hinge plates 4 are composed of a plate 4A having a substantially triangular side surface, a vertically long hole 4B formed in the lower central portion of the plate, and a connecting hole 4C formed in the upper end portion of the plate. The upper ends of the left and right hoisting arms 5 are connected to the front lower side of the plate 4A by pins 4D parallel to the short axes 3A, 3A. The contact plate 6 is configured to abut on the front end surface 2C1 of one leg 2C of the other legs 2C in the wave-dissipating block 2, and the left and right portions of the contact plate 6 are connected to the pins 4D. The parallel pins 6A are connected to the lower end portions of the left and right undulation arms 5. A hook 6B having a reverse side J protrudes above the front surface of the abutting plate 6. The left and right suspension wires 7 are connected to the left and right connection holes 4C. The lower end is connected, and the upper end is connected to the parallel hanging bracket 8. The auxiliary wire 9 has an upper end connected to the front surface of the parallel hanging bracket 8 and a lower end formed with a ring 9A that engages with and disengages from the hook 6B of the contact plate.

However, according to this, although the workability of attaching the wire to the wave-dissipating block is slightly improved as compared with the case of FIG. 1 and FIG. 2, it still requires a lot of manual labor and There is no difference in having to go to reach the block. In addition, the cantilever type in which the wire is applied only to the tip of one leg portion of the wave-dissipating block is the same as in the case of FIG. 1 and FIG. There is a risk of falling. Furthermore, only the four-legged wave-dissipating block called tetrahod is targeted, and it is difficult to apply it to other-shaped wave-dissipating blocks, for example, a six-leg wave-dissipating block B1 as shown in FIG.
JP-A-8-333078

  The object of the present invention is that manual work is not required for attaching a wire to a block, the block shape is not specified, it can be widely applied to blocks of various shapes, and regardless of the block shape. It is to be able to lift stably.

  In the lifting method of the present invention, at least three guide arms having elasticity that expands radially toward the lower end and a tightening ring penetrating these guide arms are suspended, and the tightening ring is moved to squeeze the guide arm. Thus, after hanging at least a pair of hanging wires suspended in a U shape from the lower end of the guiding arm on the block, the block is lifted together with the guiding arm.

The preferable form is as follows.
The upper ends of at least three induction arms are held by a common suspension holder, and the induction arm is suspended together with the suspension holder.

With the position fixing member fixed to the suspension holder applied to the block and the position of the guide arm fixed to the block, the guide arm is squeezed with a tightening ring and the hanging wire is hung on the block.
A hanging wire is supported on the lower end of the guide arm via a spring.

  The suspension device according to the present invention includes a suspension holder that is suspended by a suspension wire, at least three induction arms that are suspended from the suspension holder and that have elasticity that expands radially toward the lower end, and these induction arms are passed through. A clamping ring that can be suspended separately and at least a pair of hanging wires suspended in a U shape from the lower end of the induction arm, and by moving the clamping ring and squeezing the induction arm, The suspension wire is hung on the block, and then the block is lifted together with the guide arm.

The preferable form is as follows.
A hanging wire is supported on the lower end of the guide arm via a spring.
A position fixing member is suspended from the suspension holder. With this position fixing member applied to the block and the position of the induction arm fixed to the block, the induction arm is squeezed with a tightening ring to block the hanging wire. It is supposed to be hung on.
A hanging wire is wired along the guide arm and fixed to the hanging holder.

  The suspension holder is suspended from the main hook through the hanging wire by hanging the hanging wire on the main hook suspended from the crane. The suspension wire is suspended from the crane by the suspension wire. A tightening ring is suspended from the sub-hook by a suspension wire.

  The guide arm is detachably held on the suspension holder so that the number of guide arms held on the suspension holder can be changed.

  According to the present invention, at least two hanging arms suspended in a U shape from these guiding arms can be obtained by moving at least three guiding arms that expand radially toward the lower end by moving the tightening ring. It can be hung automatically on the block, and then the block can be lifted with just lifting the guide arm, eliminating the manual work of attaching the wire to the block and allowing the worker to go to the block. There is no need. In addition, since at least two hanging wires suspended in a U shape from the induction arm are hung on the block, the weight balance when suspended is good, and the risk of dropping is significantly reduced compared to the conventional case.

  If the position fixing member fixed to the suspension holder is applied to the block so that the position of the guide arm is fixed to the block, the position of the suspension wire relative to the block is inevitably determined. It can be easily hung on the block.

  If the hanging wire is supported on the lower end of the induction arm via a spring, the force applied to the hanging wire can be dispersed by the spring, and appropriate tension can be applied to the hanging wire so that it can be tightened to the block. It is possible to prevent separation after being hung.

  If the hanging wire is wired along the guide arm and fixed to the hanging holder, the U-shaped size and length of the hanging wire can be adjusted.

  A suspension holder is suspended from the suspension hook suspended from the crane by the first suspension wire, and the first suspension wire is suspended by the second suspension wire from the crane. If the tightening ring is suspended by a suspension wire on the pulley that moves along the rail, the suspension arm can be automatically hung on the block by operating the suspension wire from the crane to squeeze the guide arm. In addition, the block can be easily lifted.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  5 and 6 show the entire block lifting apparatus 1 according to the present invention, and the entire apparatus is used by being suspended by first and second two suspension wires 2 and 3 from a crane (not shown). It has become.

  The block lifting device 1 includes a ring-shaped suspension holder 5 suspended from a suspension hook 4 at the lower end of a first suspension wire 2, a position fixing member 6 suspended from the suspension holder 5, and the suspension holder 5. Three or more induction arms 7 that are vertically suspended with the upper end fixed to the inner peripheral surface of the member, and that radially expand toward the lower end around the position fixing member 6, and are wired along these induction arms 7. The suspension arm 8 is suspended from at least two hanging wires 8 suspended in a U shape from the lower end portion of the guide arm 7 and the pulley 9 at the lower end of the second suspension wire 3 so that all the guide arms 7 can penetrate. The fastening ring 10 is an inner diameter ring.

  The tightening ring 10 is suspended from the pulley 9 by a plurality of suspension wires 11 connected to at least three locations, but the suspension holder 5 is suspended from the suspension hook 4 using the suspension wire 8 as it is. .

  That is, as shown in FIGS. 7 and 8, each hanging wire 8 is suspended in a U shape from the lower ends of the two guide arms 7 so as to extend between the lower ends of the two guide arms 7. At the same time, the U-shaped wiring stopper 12 is used for wiring along the inner side surfaces of the two guide arms 7. At that time, the hanging wire 8 is supported via a spring 13 at the lower end portion of the guiding arm 7 in order to mainly give the guiding arm 7 elasticity in the horizontal direction. Then, the midway of the hanging wire 8 is detachably fixed to the inner surface of the suspension holder 5 together with the upper end portion of the guide arm 7 to which the hanging wire 8 is wired by, for example, bolting using a U-shaped bolt 14 as shown in FIG. From there, the suspension holder 5 is further extended upward and hung on the suspension hook 4.

  Note that, when the suspension holder 5 is suspended from the suspension hook 4, the suspension wire 8 may be suspended using another suspension wire 15 as shown in FIG.

  The guide arm 7 can be added when the length becomes insufficient. Further, the spring 13 can be adjusted in the vertical mounting position with respect to the guide arm 7.

  At least three guide arms 7 are suspended from the suspension holder 5, but four or more guide arms 7 can be suspended, that is, the number of suspension arms 7 can be changed. The suspension holder 5 is provided with a spare bolting portion for bolting the upper end portion of the guide arm 7. In FIG. 10, six guide arms 7 are suspended, two of them are suspended in a U shape, and a total of three suspension wires 8 are suspended from three directions on a block. It is a top view when it is set as a form.

  As shown in FIGS. 5 and 7, the position fixing member 6 is obtained by fixing a contact plate 6 b to the lower ends of a plurality of hanging rods 6 a, and the upper ends of these hanging rods 6 a are connected to the inner surface of the ring-shaped suspension holder 5. It is fixed to the suspension holder 5 by bolting. At that time, as shown in FIGS. 7 to 9, the hanging rod 6a is provided with multiple stop holes 16 for bolt tightening so that the height of the contact plate 6b can be adjusted. A protective pad made of rubber or leather may be attached to the lower surface of the contact plate 6b.

  Each guide arm 7 is in the form of a leaf spring and hangs from the upper end fixed to the suspension holder 5 while gently curving. The guide arm 7 as a whole passes through the tightening ring 10 as it is, and then reaches the lower end. The outer diameters of the tightening ring 10 are much larger than the outer diameter of the tightening ring 10.

  The inner peripheral surface 10 a of the tightening ring 10 has an arc cross section to reduce friction with the guide arm 7, and when the tightening ring 10 is moved downward, the guide arm 7 that radially expands is connected to the tightening ring 10. It gradually shrinks as you move. The vertical movement of the tightening ring 10 is performed by operating the second suspension wire 3 in FIGS. 5 and 6. At this time, the pulley 9 at the lower end of the suspension wire 3 moves along the first suspension wire 2. Move up and down.

  Next, an example of use when lifting the wave-dissipating block B1 as shown in FIG. 4 will be described. In this case, the number of the guide arms 7 that are suspended is six, and the suspension wires 8 are suspended in a U-shape from two of them, and the number of the suspension wires 8 is three.

  As shown in FIG. 12, when the crane is operated to position the block lifting device 1 directly above the wave-dissipating block B1, the first suspension wire 2 is operated to lower the position fixing member 6 together with the suspension holder 5. Then, the lower end of the contact plate 6b is applied to the wave-dissipating block B1. As a result, the height of the guide arm 7 with respect to the wave-dissipating block B1 is fixed, and the three hanging wires 8 hung from the two guide arms 7 in a U-shape are connected to the three legs of the wave-dissipating block B1. It corresponds to each part.

  In this state, as shown in FIG. 14, when the second suspension wire 3 is operated to lower the tightening ring 10, the six guide arms 7 are sunk and their lower ends approach each other. And as shown in FIG. 16, the three hanging wires 8 hung in U shape move to each of the three leg parts of the wave-dissipating block B1.

  As shown in FIG. 17, when the first suspension wire 2 is pulled up and the suspension holder 5 and the six induction arms 7 are lifted together with the suspension hook 4 at the lower end, the six induction arms 7 are further deflated. At the same time, since the three hanging wires 8 hung in the U shape also rise, they are in a state of being fastened to each of the three legs of the wave-dissipating block B1. FIG. 18 is a plan view of this state.

  In this state, as shown in FIG. 19, when both the first and second suspension wires 2 and 3 are pulled up, the wave-dissipating block B1 has three suspension wires 8 fastened to the three legs. Can be lifted in a stable state.

  As shown in FIG. 12 and FIG. 13, the number of the suspension arms 8 is set to 6 and the suspension wires 8 are suspended in a U-shape from two of each, and the number of the suspension wires 8 is three. In this case, as shown in FIG. 20, the hanging wire 8 is hung on the tip of the three legs of the four-leg wave-dissipating block B2 called Tetrahod (registered trademark). Can be lifted in a state. Further, as shown in FIG. 21, the same wave-dissipating block B2 can be turned upside down with three hanging wires 8 fastened around the outer periphery of the three legs.

Furthermore, since the number of the guide arms 7 that can be suspended from the suspension holder 5 can be arbitrarily changed as described above, it can be adapted to blocks of various shapes.
Of course, the present invention can be applied not only to the wave-dissipating block but also to a block for other uses such as a revetment block.

It is a front view which shows an example of the prior art which lifts a 4-leg wave-dissipating block. It is a front view which shows another prior art example. It is a perspective view which shows the method described in patent document 1. FIG. It is a perspective view of a 6-leg wave-dissipating block. It is a whole perspective view of the block lifting apparatus which is an example of this invention. It is also a front view. It is sectional drawing of the principal part. It is an expanded sectional view of the part. FIG. It is a whole top view. It is an expanded sectional view of the modification which suspends a suspension holder. FIG. 5 is a front view of a state before a hanging wire is hung on a leg portion of the wave-dissipating block, showing a procedure for lifting the wave-dissipating block of FIG. 4 using the block lifting device of this example. FIG. It is a front view of the state where the induction arm was squeezed and the hanging wire was moved around the legs of the wave-dissipating block. It is a front view of the state where the induction arm was further squeezed and the hanging wire was hung on the leg portion of the wave-dissipating block. FIG. It is a front view of the state which fastened the hanging wire to the leg part of a wave-dissipating block. FIG. It is a front view of the state which lifted the wave-dissipating block. It is a front view at the time of lifting a 4-leg wave-dissipating block with the block lifting apparatus of this example. It is a front view at the time of hanging up with the four wave-dissipating blocks turned upside down.

Explanation of symbols

B1 and B2 Wave-dissipating block 1 Block lifting device 2 and 3 Suspension wire 4 Suspension hook 5 Suspension holder 6 Position fixing member 6a Suspension rod 6b Plate 7 Guide arm 8 Suspension wire 9 Pulley 10 Tightening ring 11 Suspension wire 12 Wiring stopper 13 Spring 14 U-shaped bolt 15 Suspended wire 16 Stop hole

Claims (10)

  The lower end of the guide arm is suspended by suspending at least three guide arms having elasticity that expands radially toward the lower end and a tightening ring that passes through the guide arms and moving the tightening ring to squeeze the guide arm. A method of lifting a block, wherein the block is lifted together with the guide arm after hanging at least two hanging wires hanging in a U shape from the section.   The method of lifting a block according to claim 1, wherein the upper ends of at least three guide arms are held by a common suspension holder, and the guide arms are suspended together with the suspension holder.   The position fixing member fixed to the suspension holder is applied to the block, and the position of the induction arm is fixed to the block, and the induction arm is squeezed with a tightening ring, and the hanging wire is hung on the block. The method for lifting a block according to claim 2.   The method of lifting a block according to claim 1, 2 or 3, wherein the hanging wire is supported on the lower end of the guide arm via a spring.   A suspension holder that is suspended by a suspension wire, at least three guide arms that are suspended from the suspension holder and have an elasticity that expands radially toward the lower end, and the guide arms are passed through and suspended separately. A fastening ring and at least two hanging wires suspended in a U-shape from the lower end of the guide arm are provided. By moving the fastening ring and squeezing the guide arm, the hanging wire is hung on the block. The block lifting device is characterized in that the block is lifted together with the guide arm.   6. The block lifting device according to claim 5, wherein the hanging wire is supported by a lower end portion of the guide arm via a spring.   A position fixing member is suspended from the suspension holder. With this position fixing member applied to the block and the position of the induction arm fixed to the block, the induction arm is squeezed with a tightening ring to block the hanging wire. The block lifting device according to claim 5 or 6, wherein the device is adapted to be hung.   The block lifting device according to claim 5, 6 or 7, wherein the hanging wire is wired along the guide arm and fixed to the suspension holder.   A suspension holder is suspended from a suspension hook that is suspended by a first suspension wire from the crane via the suspension wire, and the first suspension is suspended by a second suspension wire from the crane. 9. The block lifting apparatus according to claim 5, wherein a tightening ring is suspended by a suspension wire on a pulley that moves along the wire.   The block lifting device according to claim 5, 6, 7, 8, or 9, wherein the guide arm is detachably held by the suspension holder so that the number of the guide arms held by the suspension holder can be changed. .

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