JP6511159B2 - Clamping device for variant block - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a clamp device that grips a deformed block when installing or relocating the deformed block used for wave absorption and the like.

  Conventionally, in addition to blocks such as rectangular parallelepipeds and cubes for revetment and wave dissipating, specially shaped concrete blocks such as tetrapod blocks called tetrapods (trade name) are used for structures such as breakwaters. This irregularly shaped block is usually constructed as a breakwater revetment structure by sequentially stacking it on the seabed or mound, or by appropriately arranging it in front of a breakwater or revetment.

  By the way, many of the odd-shaped blocks are not stacked up casually, and in order to prevent the falling of the odd-shaped blocks due to striking waves etc., it is possible to install them so that the legs of adjacent plural adjacent odd-shaped blocks are entangled with each other. It has been demanded. And when stacking up the variant blocks, there is an attitude or arrangement attitude of the variant blocks in which the legs are intertwined with each other, and the variant blocks stored on the ground are suspended so that they become the installation attitude. Will be placed.

  In addition, removal and transfer work of installed variant blocks are also widely performed when the variant blocks are washed away and moved due to age deterioration or waves. These operations require a step of gripping the deformed block in water and moving it to an appropriate position.

  A clamping device is known in which three clamping arms are opened and closed by hydraulic pressure to grip and suspend the variant block for gripping the variant block on the ground or in the water. Japanese Patent Application Laid-Open No. 2-300092), Patent Document 2 (Japanese Utility Model Application Publication No. 63-136687), Patent Document 3 (Japanese Patent Application Laid-Open No. 6-286973) and the like are disclosed.

Unexamined-Japanese-Patent No. 2-300092 Japanese Utility Model Publication No. 63-136687 JP-A-6-286973 JP 10-279266 A JP, 2011-73863, A

  However, since the odd-shaped block is a heavy weight of several tens of tons and up to 80 tons and is a concrete block in which no reinforcing material such as rebar is used inside, the part held by the holding arm of the clamp device There was a problem of being easily damaged. Specifically, when the deformed block is clamped by the thin clamping arm of the clamp device, the weight of the block is concentrated on the contact surface with the clamping arm, causing abrasion damage or breakage of the deformed block. Due to the damage or breakage of this variant block, the clamping device has been substantially used for the new installation of variant blocks.

  From the above reasons, the devices of Patent Document 1 and Patent Document 3 aim to eliminate the danger of putting a block on a block installed on the seabed etc. The application is limited to the removal device used for the work of hanging and holding the block and removing it.

  On the other hand, there is known a clamp device using a protective pad at a contact point of the holding claw with the object to be held for preventing damage to the object to be held and slippage. As these devices, for example, in Patent Document 4 (Japanese Patent Application Laid-Open No. 10-279266), a rubber plate is used as an anti-slip material on the inner surface side of the clamp, and in Patent Document 5 (Japanese Patent Application Laid-Open No. 2011-73863) At the lower end portion of the gripping claws, a non-slip pad is provided which is coated with a rubber on the surface of an unevenness formed by bolts in order to avoid damage to the object to be gripped.

  However, the devices of Patent Document 4 and Patent Document 5 can grip even a simple rubber plate or a pad having a surface coated with rubber because the object to be gripped is a relatively lightweight material In the case of using for a heavy load, there is a problem that a sufficient anti-slip can not be secured or the pad itself which is weak to the shear force is broken.

  Therefore, an object of the present invention is to solve the above-mentioned problems, and to securely hold the deformed block without damaging the deformed block and without damaging the deformed block to be gripped. It is possible to provide a clamping device that can be applied to new installation of deformed blocks.

  In order to solve the above technical problems, the present invention provides a clamp device of a modified block having the following configuration.

The clamp device according to the present invention is provided with a hanger member suspended by a cargo handling device , a support body positioned below the hanger member, and a support body extending downward from the support body so as to be openable and closable on an outer peripheral portion of the support body. And a plurality of clamping arms capable of clamping the oddly shaped block, the tip end portion of the clamping arm is provided with a mounting hole opened by the clamping side of the irregularly shaped block, and the mounting hole has a surface that contacts the irregularly shaped block is the mounting hole And a contact pad protruding from the bottom.

The contact pad may be made of an elastic material in which a reinforcing fiber member is embedded. In addition to rubber materials such as natural rubber and synthetic rubber, elastomer resins can be used as the elastic material.

  Further, the contact pad may be configured to be embedded in a state in which a metal rope obtained by twisting metal wires is used as the reinforcing fiber member and the metal ropes are erected.

  The metal ropes may be arranged in a grid at predetermined intervals.

  The contact pads may be arranged such that the fore-ends of the metal ropes are exposed on the surface of the contact pads.

  The contact pad may be configured to laminate a fabric made of a synthetic fiber material with a layer of the elastic material.

  An elastic member may be accommodated between the mounting hole and the contact pad.

A storage frame surrounding the periphery of the contact pad may be provided between the contact pad and the mounting hole.

  According to the present invention, since the tip end portion of the holding arm is provided with the buffer member, the deformed block can be held without being damaged. Here, since the contact pad protrudes from the inner surface of the sandwiching arm toward the deformed block and is in the direction along the surface at the attachment position, when the contact surface contacts the deformed block, There is no possibility that the clamping arm contacts the deformed block and damages it.

  In addition, since the contact pad is surrounded by the storage frame and is made of an elastic material such as synthetic rubber provided with a reinforcing fiber member inside, the contact pad is thickened and damage occurs when the irregular block is held And the like, while being resistant to shearing by the storage frame and the reinforcing fiber member embedded in the inside while holding it firmly without breaking even when holding a heavy profile block. Can.

  As the reinforcing fiber member, metal strands or synthetic resin fibers can be suitably used. Particularly preferably, by exposing the fore-end surface of the metal rope to the surface side, the friction with the deformed block can be increased, and the anti-slip effect can be increased.

  Therefore, even if the odd-shaped block is held, the risk of breakage or falling can be reduced, and it can be suitably used for installation work of the odd-shaped block.

It is a figure which shows typically the structure of the crane apparatus used with the clamp apparatus of the odd-shaped block concerning embodiment of this invention. It is a figure which shows the structure of the apparatus main body of the clamp apparatus of the odd-shaped block of FIG. It is a side view which shows typically the state which the clamping arm of the clamp apparatus of FIG. 2 opened. It is a top view which shows the structure of the clamp apparatus of FIG. 2 typically. It is a side view which shows typically the structure of the front-end | tip part of the clamping arm of the clamp apparatus of FIG. It is a front view which shows typically the structure of the front-end | tip part of the clamping arm of the clamp apparatus of FIG. It is a schematic diagram which shows the structure of a buffer member, (a) is the figure seen from the contact surface side, (b) is the figure seen from the side, (c) is sectional drawing in a CC line. It is an enlarged view which shows the structure of the universal hanger used for the clamp apparatus of FIG. It is a top view which shows the structure of the universal hanger of FIG. It is sectional drawing which shows the structure of the universal hanger of FIG. It is a side view which shows typically the structure of the front-end | tip part of the clamping arm concerning 2nd Embodiment. It is sectional drawing which shows typically the structure of the buffer member used for the clamp apparatus concerning 2nd Embodiment. It is a side view which shows typically the structure of the front-end | tip part of the clamping arm concerning 3rd Embodiment. It is sectional drawing which shows typically the structure of the buffer member used for the clamp apparatus concerning 3rd Embodiment. It is sectional drawing which shows typically an example of the structure which arrange | positions the buffer member used for a clamp apparatus so that advancing / retracting is possible in a mounting hole. It is sectional drawing which shows typically the modification of the structure which arrange | positions the buffer member used for a clamp apparatus at the front-end | tip part of a clamping arm.

  Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.

  The clamp device 1 of the odd-shaped block according to the present embodiment is used by being suspended from a crane 101 as an example of a cargo handling device installed on a boat as shown in FIG. In the harbor, etc., the block B (hereinafter sometimes simply referred to as a block) may be suspended by a clamp device 1 for repositioning or installation in a harbor or the like for revetment of the beach or the breakwater, wave attenuation, etc. Do.

  The crane 101 is wound around a wire take-up reel 103, and the clamp device 1 is connected and suspended to a main wire 102 taken out of a main wheel 104 at the tip of the crane 101. The wire take-up reel 103 takes up and unwinds the main wire 102 by the drive device 106. By the winding and unwinding of the main wire 102, the hanging position of the clamp device 1 is determined, and the depth position of the clamp device 1 can be specified from the amount of extension of the main wire 102 and the like.

  The crane is provided with a secondary wire 102a configured to be operable independently of the main wire 102, and is arranged to be suspended from a secondary wheel 104a provided at the tip of the crane. The auxiliary wire 102a is used to adjust the inclination angle of the device main body 1 described later, and the inclination angle of the device main body 1 can be changed by changing the relative extension amount of the auxiliary wire 102a with respect to the main wire 102. It can be adjusted.

  The operation of the main wire 102 and the sub wire 102a is performed by operating the drive device 106 with an operation unit (not shown) provided on a vessel or the like.

  Further, a hydraulic hose 109 wound around a turn wheel 107 suspended from an intermediate portion of the crane is connected to the clamp device 1. The hydraulic hose 109 is wound around the hose reel 108, is drawn out according to the hanging position of the clamp device 1, and operates a hydraulic cylinder 7 of the clamp device 1 described later according to the operation of the hydraulic unit 110. In the present embodiment, as will be described later, the clamp device 1 is provided with three hydraulic cylinders 7, and the hydraulic cylinders 7 for driving them operate as one unit, but each hydraulic cylinder operates independently. The hydraulic unit 110 may be configured as three systems.

  The hydraulic unit 110 is provided on a ship or the like, and operates the hydraulic cylinder 7 of the clamp device 1 to operate the opening / closing operation of the clamping arm 4 described later. The configuration of the clamp device 1 will be described later.

  FIG. 2 to FIG. 4 are views showing the configuration of an apparatus main body of a clamp device of an odd-shaped block according to the present embodiment. As shown in FIG. 2, the apparatus main body 1 according to the present embodiment includes a universal hanger 2 as an example of a hanger member connected to a crane, a support body 3 fixed to the lower part of the universal hanger 2, It comprises three holding arms 4 provided along the outer peripheral portion of the support body 3 and for holding the block B to be held.

  The universal hanger 2 has a structure capable of arbitrarily changing the inclination angle and the pivot angle with respect to the support body 3 located below it. The mechanism for changing the tilt angle of the universal hanger 2 and turning will be described later.

  The support body 3 is located below the universal hanger 2 and has a cap portion 10 which is provided at the lower end and which is provided over the entire periphery of the top surface 12 and the top surface 12 and extends downward. There is. A bracket 5 for mounting the holding arm 4 is provided on the outer surface of the side wall 11 of the cap portion 10.

  In the cap portion 10, a region surrounded by the side wall is a storage space 13 into which the leg portion 112 of the block B is inserted. In the storage space 13, as shown in FIG. 2, when the block B is inclined in a state where the leg portion 112 of the block B is inserted and the holding arm 4 is closed and the leg base portion 111 of the block B is supported, It is preferable that the tip end of the portion 112 be sized to prevent the block B from falling off the side wall 11.

  Specifically, the length dimension of the holding arm 4, the diameter dimension of the cap portion 10, and the length dimension of the side wall 11 can be determined by the size of the block B in the range that can be held by the device body 1. Also, the storage space 13 may be configured to store the entire leg according to the size of the block B, not only the leg 112 of the block B, that is, the tip end portion of the leg.

  Further, hydraulic cylinders 7 are provided respectively on the brackets 8a provided in the cylinder attachment portion 8 located above the support body 3, and the cylinder rods of these hydraulic cylinders 7 are pivotally attached to the upper end of the holding arm 4 ing.

  Further, an accumulator (not shown) for each hydraulic cylinder 7 and the like is built in an intermediate portion 9 provided between the cylinder attachment portion 8 of the support body 3 and the cap portion 10.

  As shown in FIG. 4, in the holding arm 4, a pivot 6 provided at an intermediate portion is pivotally attached to a bracket 5 disposed at an interval of 120 degrees along the outer peripheral portion of the support body 3. A lower portion than the lower portion is provided to extend downward from the support body 3. A hydraulic cylinder 7 is connected to the upper end of each sandwiching arm 4, and the lower portion opens and closes as the hydraulic cylinder 7 expands and contracts.

  The tip end portion 14 of the holding arm 4 is bent inward so as to support the block B from the lower side, and as shown in FIGS. 5 and 6, the inner holding surface 14a of the tip portion holds each holding arm 4 are provided with three buffer members 15 of different sizes so as to project from the inner surface 14a. The cushioning member 15 has a contact pad 18 having an elastically deformable contact surface 16 in contact with the surface of the block when clamping the block B to prevent damage to the surface of the block by the clamping arm. The buffer member 15 is disposed such that the contact surface 16 of the contact pad 18 is in a direction substantially along the surface 14 a of the tip end of the holding arm 4.

  By providing a plurality of independent cushioning members 15 in one holding arm 4, each cushioning member bends independently according to the surface shape of the block, so it easily conforms to the shape of the block and a larger contact area can be obtained. It can be secured. Thereby, concentration of load on the block can be reduced, and damage to the block and the cushioning member 15 can be reduced.

  FIG. 7 shows the configuration of the buffer member. Although the buffer member of FIG. 7 shows the largest one provided on the upper side of the tip end of the holding arm, the buffer members 15 of other sizes also have the same basic configuration. As shown in FIGS. 7A and 7B, the buffer member 15 defines an outer shape, and is filled with a metal storage frame 17 surrounding the periphery of the contact pad 18 and the inside of the storage frame 17. And a contact pad 18 disposed on the

  As shown in FIG. 7C, the storage frame 17 is formed of an annularly shaped metal provided with a storage frame bottom surface 17b and side walls 17s provided around the storage frame bottom surface 17b. In the present embodiment, the storage frame 17 uses stainless steel having a thickness of 16 mm, but the metal material to be used and the thickness dimension can be appropriately designed according to the design specification of the clamp device 1. Further, the outer dimensions of the storage frame may be appropriately determined in accordance with the width of the tip end portion 14 of the holding arm.

  The contact pad 18 provided inside the storage frame is a synthetic rubber as an example of an elastic material reinforced with a metal rope 19 and is disposed so as to project from the upper end of the side wall of the storage frame 17. In the present embodiment, the amount of protrusion from the upper end of the storage frame 17 to the contact surface 16 is 20 mm, but this is not a limitation, and pressing deformation of the contact pad 18 due to contact with the block B described later At this time, the surface of the block may not be in contact with the storage frame 17 as well.

  The contact pads 18 are arranged in a grid at predetermined intervals in a state where the metal ropes 19 are erected from the bottom surface of the bottomed container-like mounting fitting 21, and the synthetic rubber filler 20 is filled between the metal ropes 19. Created by

  The mounting fitting 21 has an outer shape that can be fitted into the internal space of the storage frame 17, and in the present embodiment, the mounting fitting 21 is partitioned by a reinforcing wall 21a provided at a central portion.

  The fore-end surface of the metal rope 19 is exposed to the contact surface 16 of the buffer member 15 and abuts on the surface of the block B when the block B is held. The ratio of the fore-end surface of the metal rope 19 to the entire contact surface is preferably about 30 to 70%.

  In the present embodiment, a stainless steel rope is used as the metal rope 19 from the viewpoint of corrosion prevention in the sea. In this embodiment, although the thing of rope diameter 10mm is used, it is not limited to this, According to the specification of a clamp device, it can choose suitably. Also, as described later, in order to ensure appropriate elastic deformation in the thickness direction, thin strands are used as the strands used for the metal rope 19, and the twist structure thereof is 7 × 37 or 7 × 19. It is preferable to However, the present invention is not limited to this, and can be appropriately selected according to the size of the buffer member 15, the weight of the block B, and the like.

  As described above, the universal hanger 2 is configured to be capable of changing the inclination angle and the pivot angle of the clamp device 1. Hereinafter, the configuration of the universal hanger will be described.

  8 to 10 are enlarged views showing the configuration of the universal hanger of the clamp device. In these figures, a three-dimensional coordinate axis is defined in the figure in order to clarify the tilt axis and the pivot axis, and the directions of the tilt angle and pivot angle by the universal hanger will be described below along the coordinate axis.

  The universal hanger 2 includes a hanger 30 connected to the main wire 102 of the crane 101, a joint 31 connected to the hanger 30, and a swivel device 32 connected to the joint 31. The suspension fitting 30 is formed in an annular shape in the upper portion to connect with the main wire 102, and is connected to the upper side of the joint 31 by a bolt 33 extending in the Y-axis direction. Thereby, as shown by the arrow 93 of FIG. 10, the hanger 30 can rotate around the Y axis.

  As shown in FIGS. 9 and 10, the joint 31 has a U-shaped cross section whose lower side is open, and the upper side is connected to the hanging bracket 30. On the upper surface of the joint 31, a rib 34 for connecting to the hanging bracket 30 is provided along the X direction, and the hanging bracket 30 is connected so as to sandwich the rib 34.

  The swivel device 32 is fixed to the leg portion 35 of the joint 31 by the connecting shaft 36 along the X-axis direction, and can rotate around the X-axis with respect to the joint 31 as shown by the arrow 92 in FIG. ing.

  Further, the swivel device 32 supports the support shaft 3a located at the upper end of the support body 3 so as to be pivotable about the Z-axis. The swivel device 32 is formed in an annular shape, has a cylindrical collar 39 in which a connecting shaft is inserted, and is provided with a through hole 37 extending in the Z-axis direction at the center. The support shaft 3 a is inserted into the through hole 37, and the support shaft 3 a is supported by the connecting shaft 36. Further, the connecting shaft 36 is provided with two thrust bearings 38 so as to sandwich the connecting shaft 36 from above and below, and engages with a collar 39 extrapolated to the connecting shaft 36. Further, bearings 39a are provided on the upper and lower sides of the thrust bearing via spacers 39d, and a collar 39 and a split collar 39b are connected to the outer ring and the inner ring of the bearing 39a, respectively. The split collar 39b fits in an annular groove provided at the upper end of the support shaft 3a to prevent the support shaft 3a from coming off. On the upper and lower sides of the collar 39, pressing plates 39c for preventing the bearing 39a from falling off are provided.

  A swing motor 40 is provided in the swivel device 32 as a power source for rotating the support shaft 3a. A drive gear 40a is provided on the rotation shaft of the swing motor 40, and the drive shaft 40a is rotated by the drive of the swing motor 40 by a drive chain 40c wound around a drive gear 40b provided on the support shaft 3a.

  In addition, the apparatus main body 1 concerning this embodiment is the state which the leg part 112 is not inserted in the storage space 13, as shown in FIG. 2, in the state suspended from the cargo handling apparatus, ie, the leg of block B is lower. Even in the case of holding the block B in the direction facing the direction, the falling can be prevented. As shown in FIG. 2, when the leg portion 112 of the block B is not inserted into the storage space 13, the block base portion 111 of the block B is disposed to approach the lower end of the side wall 11 of the cap portion 10. Even when the block B is inclined when it is lifted, the inclination of the block is limited by contacting the lower end of the side wall 11 extending in the hanging state. Thereby, the fall of the block B can be prevented.

  That is, the apparatus main body according to the present embodiment inserts the leg 112 into the storage space 13 when the leg 112 of the block is upward, and when the leg 112 of the block is downward, the leg base portion By holding the block in such a way that it approaches the lower end of the side wall 11, it is possible to prevent the dropped block from being held in any orientation.

  When suspending the block B using the clamp device 1 of the block according to the present embodiment of the above configuration, the clamp device 1 is connected to the main wire 102 of a crane provided on a barge or the like, and a display device After the position of the apparatus main body 1 and the leg portion 112 of the block B are detected from the feeding amount of the main wire 102, the leg portion 112 is operated so as to be accommodated in the storage space 13. In addition, the swingable swivel is pivoted so that the holding arms 4 provided at intervals of 120 degrees are positioned between the landing legs of the block, and the turning angle of the holding arms 4 is adjusted.

  When the block 112 is mounted not in the vertical direction but in an inclined state, and it is difficult to insert the end of the leg 112 into the storage space 13 of the cap, the universal joint 2 described above The angle of the clamp device 1 can be adjusted. When the angle adjustment is performed, the auxiliary wire 102a is connected to any of the tilting hangers 22 provided on the respective holding arms 4, and the amount of extension of the auxiliary wire 102a is manipulated.

  When the tip end of the leg 112 enters the storage space 13, the position change is performed while maintaining the orientation of the apparatus body 1 as it is, and the leg 112 is inserted to the back of the storage space 13. In that state, the hydraulic cylinder is operated to close the clamping arm 4 and clamp the block B. At this time, since the tip end of the holding arm 4 is bent along the outer shape of the root portion 111 of the block B, it is lower than the equatorial portion 113 of the leg portion 111 of the leg portion 112 inserted into the storage space 13. The contact surface 16 of the cushioning member 15 is in wide contact with the surface of the block B and supports the block B from the lower side.

  In this state, when the main wire 102 is wound up and the device body 1 is pulled up, the contact pad 18 of the buffer member 15 is deformed in the thickness direction by the holding force supporting the weight of the block B, and the surface of the block B is damaged. ease. As described above, since the contact pad 18 is configured such that the fore-end surface of the metal rope 19 is exposed to the contact surface 16 in the state of being erected in the thickness direction, the individual strands of the metal rope are the surface of the block B. Firmly prevent the block B from slipping. Further, since the contact pad 18 is housed inside the housing frame 17 and a sufficient thickness dimension is secured, the deformation in the shearing direction is suppressed because the contact pad 18 is surrounded by the side wall 17s of the housing frame 17 Damage due to shear force in the direction along the surface of the contact pad 18 is suppressed.

  Further, when the block B is suspended, the block B may be inclined depending on the nipping position of the nipping arm 4. At this time, since the leg 112 is stored in the storage space 13, the tip of the leg 112 abuts against the inside of the side wall, and the block B is supported by the holding arm 4 and the cap 10 to maintain balance. Dropout of the device B from the device body 1 is prevented. Further, since the contact is supported by the buffer member 15, abrasion damage and the like of the holding arm due to the displacement of the block can be suppressed.

Second Embodiment
A partially enlarged view of the clamp device according to the second embodiment is shown in FIG. The clamp device according to the present embodiment has the same configuration as the clamp device according to the first embodiment except for the configuration of the buffer member provided at the distal end portion of the sandwiching arm 4 and the mounting configuration thereof. The explanation will focus on points.

  The clamp apparatus concerning this embodiment has the attachment hole 42 for inserting the buffer member 41 in the front-end | tip part 14 of a clamping arm. The mounting hole 42 is sized to fit the storage frame 43 of the buffer member 41, and is fixed in the mounting hole 42 via the elastic member 42b fixed to the bottom surface 42a.

  The elastic member 42 b is made of an elastic material such as rubber, and is interposed between the storage frame 43 and the bottom surface 42 a of the mounting hole 42. The elastic member 42b is deformed when a pressure is applied to the buffer member 41 in accordance with the contact with the block B to allow the buffer member 41 to move into the mounting hole 42, and the block B is subjected to an excessive instantaneous load. Prevent it from being added.

  Similar to the first embodiment, the cushioning member 41 is configured such that the contact pad 44 made of synthetic rubber or the like protrudes into the upper end of the storage frame 43 in the storage frame 43 with a bottomed container shape. It is. The buffer member 41 according to the present embodiment has a larger thickness than the buffer member 41 used in the first embodiment because the buffer member 41 according to the present embodiment can be advanced and retracted in the mounting hole 42 as described above.

  The contact pad 44 used for the buffer member 41 of the present embodiment adopts a configuration in which a synthetic fiber fabric is embedded in a laminated state as shown in FIG. As the synthetic fibers, organic synthetic fibers, metal fibers, inorganic fibers, etc. can be widely used as long as they are high in tensile strength and elastic modulus that can achieve the purpose of preventing the damage of the contact pad 44 against heavy objects. For example, aramid fibers, Zylon (trade name), carbon fibers and the like can be suitably used. These synthetic fibers are in the form of a cloth and laminated in multiple layers with a synthetic rubber adhesive 45 to constitute a contact pad 44.

  The contact pad 44 configured in this way can prevent the damage in the surface direction by the synthetic fiber layer 46 while securing the elasticity in the thickness direction by the synthetic rubber adhesive 45 and the synthetic fiber layer 46. Further, deformation in the direction along the surface is suppressed by the side wall of the storage frame 43, and breakage due to shear force in the direction along the surface of the contact pad 44 is suppressed. The contact pad 44 is pressed and compressed against the block B by the holding force of the holding arm at the time of gripping, the shape conforms to the block, the contact area increases, and the surface pressure decreases, thereby also functioning as a buffer member.

Third Embodiment
A partially enlarged view of the clamp device according to the third embodiment is shown in FIG. The clamp device according to the present embodiment has the same configuration as the clamp device according to the second embodiment except for the configuration of the buffer member provided at the distal end portion of the sandwiching arm 4. explain.

  The clamp device according to the present embodiment has a mounting hole 48 for inserting the buffer member 47 in the distal end portion 14 of the clamping arm. The mounting hole 48 is formed in a size that allows the buffer member 47 to be fitted, and is fixed in the mounting hole 48 via the adhesive 48 b made of an elastic material fixed to the bottom surface 48 a.

  The elastic member 48 b is made of an elastic material, and is interposed between the buffer member 47 and the bottom surface 48 a of the mounting hole 48. The elastic member is deformed when a pressure is applied to the buffer member 47 in accordance with the contact with the block B to allow the buffer member 47 to move into the mounting hole 48, and the block B receives an excessive instantaneous load. Prevent joining.

The buffer member 47 is composed of a mount 49 configured substantially the same as the opening of the mounting hole 48, and a contact pad 50 made of synthetic rubber or the like located on the upper surface of the mount 49. The buffer member 47 according to the present embodiment can be advanced and retracted into the mounting hole 48 as described above, and is mounted such that only the contact pad 50 protrudes from the opening of the mounting hole 48.

  The contact pads 50 used for the buffer member 47 of the present embodiment are arranged in a grid in a state where the metal ropes 51 are erected on the upper surface of the mount 49 as shown in FIG. It is made by filling a rubber filler 52. The fore-end surface of the metal rope 51 is exposed to the contact surface 53 of the contact pad 50 and abuts on the surface of the block B when the block B is held. The ratio of the fore-end surface of the metal rope 51 to the entire contact surface is preferably about 30 to 70%.

  Since the side wall 48s around the mounting hole 48 functions as a storage frame surrounding the buffer member 47 in this way, the deformation in the shear direction is suppressed and the surface of the contact pad 18 is covered with the side wall 48s. Damage due to shear forces along the direction is suppressed. Further, the contact pad 50 is deformed in the thickness direction and the damage on the surface of the block B is alleviated by the holding force for supporting the weight of the block B while securing the elastic modulus in the thickness direction by the filler 52 of synthetic rubber. Furthermore, since the contact pad 50 is configured such that the fore-end surface of the metal rope 51 is exposed to the contact surface 53 in a state of standing in the thickness direction, the individual strands of the metal rope firmly adhere to the surface of the block B. By sliding in, block B is prevented from slipping.

  As described above, according to the clamp device according to the present embodiment, since the tip end portion of the holding arm is provided with the buffer member, the block can be held without being damaged. In addition, since the cushioning member has a rubber contact pad and a reinforcing fiber member for reinforcing the contact pad embedded in the inside of the storage frame for determining the outer shape, it is resistant to shearing and is damaged even when the block is heavy. You can hold it firmly without letting it go.

  Moreover, since the holding | grip arm can change the inclination angle and turning angle arbitrarily by a universal lifting tool, it can be used suitably also for the installation operation | work which needs to specify and install the angle and direction of a block.

  The present invention is not limited to the above embodiment, and can be practiced in various other aspects. It is widely applicable if it is the composition which installs the contact pad reinforced with textiles so that it may project from the upper end of a storage frame inside the storage frame which constitutes an outer frame as a shock absorbing member. In addition, the contact pad is sufficient as long as it can ensure strength to the extent that breakage due to shear force can be prevented, and the form of the fibers embedded inside is not particularly limited in the above embodiment, and it is reinforced by a fiber reinforcing member It is widely applicable if it has the above configuration.

  Further, as shown in FIG. 15, as an example of the elastic member for attaching the buffer member 47 in the mounting hole so as to be able to move back and forth, a spring interposed between the bottom surface 48a of the mounting hole 48 and the mounting base 49 of the buffer member 47. It is also possible to use 55.

  Also, as the attachment structure of the contact pad to the tip of the sandwiching arm, as shown in FIG. 16, on the surface 14a of the tip 14 of the sandwiching arm 4 other than fitting the contact pad into the recess provided in the sandwiching arm. The fixing member 60 may be provided so as to protrude and be fixed by being fitted into a recess 62 provided in the contact pad 61. At this time, both may be fixed together by using an adhesive or bolt fastening (not shown). The fixing member 60 inserted into the contact pad 60 reinforces the contact pad 61, suppresses deformation in the shear direction, and suppresses breakage due to shear force in the direction along the surface of the contact pad 18.

  Furthermore, for example, in each of the above-described embodiments, the tetrapod (trade name) is used as a block and the tip of the leg is held by being inserted into the cap, but the block used is particularly limited Depending on the shape of the block, it is possible to widely adopt a configuration for assisting the gripping by the clamp device.

In addition, the effect which each has can be exhibited by combining suitably the arbitrary embodiment in said various embodiment.
While the present invention has been fully described in connection with the preferred embodiments with reference to the accompanying drawings, various changes and modifications will be apparent to those skilled in the art. Such variations and modifications are to be understood as included within the scope of the present invention as set forth in the appended claims, unless they depart therefrom.

Reference Signs List 1 clamp device 2 flexible hanger 3 support body 3a support shaft 4 sandwiching arm 5 bracket 6 pivot shaft 7 hydraulic cylinder 8 cylinder mounting portion 8a bracket 9 middle portion 10 cap portion 11 side wall 12 top surface portion 13 storage space 14 tip portion 14, 41 47, 61 buffer member 16, 53 contact surface 17, 43 storage frame 17b storage frame bottom surface 17s storage frame side wall 18, 44, 50 contact pad 19, 51 metal rope 20, 52 filler 21 mounting bracket 21 mounting bracket 21a reinforcing wall 30 suspension bracket 31 Joint 32 Swivel device 33 Bolt 34 Rib 35 Leg 36 Connecting shaft 37 Through hole 38 Thrust bearing 39 Collar 39a Bearing 39b Split collar 39c Holding plate 39d Spacer 40 Slewing motor 40a, 40b Drive gear 40c Drive chain 42, 48 Mounting hole 42a, 48a Bottom surface 42b, 48b Elastic member 48s Side wall 45 Synthetic rubber adhesive 46 Synthetic fiber layer 49 Mounting base 55 Spring 60 Fixing member 62 Concave portion 100 Carrier 101 Crane 102 Main wire 102a Secondary wire 103 Wire take-up reel 104 Primary wheel 104a Secondary wheel 106 Drive device 107 Turn wheel 108 Hose reel 109 Hydraulic hose 110 Hydraulic unit 111 Leg base portion 112 Leg B Modified block

Claims (7)

A hanger member suspended by a cargo handling device, a support body positioned below the hanger member, and a support body extending downward from the support body, provided openably and closably on an outer peripheral portion of the support body, capable of holding an irregular block A plurality of clamping arms provided at the tip end of the clamping arms with mounting holes open at the side holding the deformed block, the contact pads are fitted in the mounting holes, and the side walls of the mounting holes are surrounded by the contact pads The clamp apparatus which is comprised as a storage frame, makes a contact pad project from the said attachment hole, and is contact | abutted to the said irregular block .   The clamp device according to claim 1, wherein the contact pad is made of an elastic material having a reinforcing fiber member embedded therein.   The clamp apparatus according to claim 2, wherein the contact pad is embedded in a state in which the metal rope obtained by twisting metal strands is used as the reinforcing fiber member and the metal ropes are erected.   The clamp apparatus according to claim 3, wherein the metal ropes are arranged in a grid at predetermined intervals.   The clamping device according to claim 3 or 4, wherein the contact pad is arranged such that the respective fore-ends of the metal ropes are exposed on the surface of the contact pad. The clamp device according to claim 1, wherein the contact pad is configured by laminating a fabric made of a synthetic fiber material . The clamp apparatus according to any one of claims 1 to 6, wherein an elastic member is accommodated between the mounting hole and the contact pad.

Images