JP2553000B2 - 4-leg block removal device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete block removing device, and more particularly to a concrete block removing device for suspending and relocating atypical blocks installed for seawall protection and wave breaking. The present invention relates to a removal device that is preferably used.

[0002]

2. Description of the Related Art Conventionally, as an atypical block installed for seawall protection and wave-dissipating, for example, a tetrahedron having legs extending from the center of a tetrahedron toward the respective vertices. A concrete block called a pod (registered trademark) (hereinafter referred to as a four-legged block) is widely used.

The four-legged block is usually stacked on the seabed or mound to form a wave-dissipating structure, or is appropriately stacked on the front of a breakwater or a seawall to form a wave-dissipating seawall structure.

By the way, as a means for moving or removing a large amount of four-legged blocks used in such a structure, a method of hanging a crane using a sling rope has long been used. Although it is adopted, not only is the work of slinging the rope on the four-legged block troublesome, but the risk increases when diving work is involved, so for example, opening and closing the three holding arms by hydraulic pressure. There has been proposed a gripping machine (Japanese Utility Model Laid-Open No. 3-18084) in which a four-legged block is clamped.

In this gripping machine, three lower holding arms for holding a predetermined portion of a supporting leg portion other than a head leg portion of a four-leg block on an outer peripheral portion of a supporting frame suspended by a crane at equal intervals. At the same time, the lower holding arms are pivotally attached to the support frame through a pair of upper and lower link members, and the operation rod ends of the three hydraulic cylinders are pivotally attached to the support frame at their tail ends. The lower leg holding arms are connected to the upper ends of the lower leg arms and pivotally operate the lower leg arms about a pivot axis so that the support leg portions of the four-leg block are pinched from below. ing.

However, since the four-legged blocks that compose the wave-dissipating structure and the wave-dissipating revetment structure are intertwined with each other in various postures, the lower holding arms are adjacent to each other during removal work or the like. In many cases, it is not possible to insert it properly into the gap between the four-legged block, and then the target four-legged block will be clamped in an unstable posture, making it impossible to perform safe and reliable lifting and removal work. Problems may occur.

[0007]

In view of the above, according to the present invention, there is provided a support frame 4 attached to a cargo handling device such as a crane.
Three lower holding arms for holding a predetermined portion of the supporting leg other than the head leg of the leg block are arranged at equal intervals, and the lower holding arms are supported by a pair of upper and lower link members. The three-cylinder hydraulic cylinders, each of which is pivotally attached to the support frame, and whose tail ends are pivotally attached to the support frame, are connected to the upper ends of the lower holding arms of the four-leg block removing device. An upper holding arm for holding the head leg portion of the four-legged block is arranged between two adjacent lower holding arms arranged on the frame body, and the upper end portions of these three upper holding arms are arranged as described above. It is pivotally attached to the support frame, and the tail end of the hydraulic cylinder provided for each upper clamping arm is pivotally attached to the support frame, and the operation rod end is connected to the shoulder of each upper clamping arm, and the lower clamping is performed. Use a water jet on the lower end of the arm. By adopting a configuration in which a jet injection nozzle device is arranged, it is possible to safely and reliably perform lifting and removing work of four-legged blocks in various postures and intertwined with each other. Is.

[0008]

[Operation] In the removal device according to the present invention, in the case of a four-legged block having a good installation posture, the head leg portion is pinched only by the upper holding arm, or the head leg portion and other supporting leg portions are held by the upper holding portion. The operation is performed by operating the arm and the lower holding arm so as to appropriately hold and hang up and remove the work.

Further, in the case of a four-legged block in which the installation posture is bad and the two are intermeshed with each other, for example, a predetermined upper holding arm is engaged with its head leg portion, and the upper holding arm is substantially opposed to the upper holding arm. Inserting the lower clamping arm along the outside of the other support leg, clamping it in cooperation with the upper clamping arm, shaking it appropriately to correct the posture, and then either re-clipping it or suspending it and removing it. Is.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a four-legged block removing device according to the present invention will be described below in detail with reference to the accompanying drawings.

Referring to the accompanying drawings, a removing device 10 according to the present invention is intended to be suspended along an outer peripheral portion of a support frame 12 which is suspended by a cargo handling device (not shown) such as a crane via a hook member. The three upper clamping arms 14, 16 and 18 for clamping the head leg a of the four-leg block A and the lower part of the four-leg block A by abutting on predetermined positions of the remaining supporting legs b, c and d. 3 lower clamping arms 2 for clamping
It is basically configured by arranging 0, 22, and 24 respectively.

That is, the upper holding arms 14, 1
Reference numerals 6 and 18 denote directions in which lower ends (tips) of the brackets 26, which are arranged at 120-degree intervals along the outer periphery of the support frame 12, are pivotally attached to each other via pivot shafts 28 so that their lower ends (tips) open and close. It is rotatably supported by.

The bracket 26 of the support frame 12 is also provided.
The tail ends of the hydraulic cylinders 30 are pivotally mounted above the mounting positions, and the operating rods 32 of these hydraulic cylinders 30 are attached.
The end of each of the shoulders 14 of the upper clamping arms 14, 16 and 18
a, 16a, 18a.

On the other hand, another bracket 34 is attached to the center of each of the brackets 26 on which the upper holding arms 14, 16, 18 of the support frame 12 are pivotally attached, and a pair of upper and lower brackets 34 are attached to the brackets 34, respectively. The link members 36 and 38 set to have substantially the same length are attached via pivots 40 and 40, and the upper ends of the lower holding arms 20, 22 and 24 are pivotally attached to the pair of link members 36 and 38, respectively. To do.

Each lower holding arm 20, 22, 24
The hydraulic cylinder 4 arranged in the same manner as above at the upper end of the
The end of the second operating rod 44 is pivotally attached.

Then, the pair of link members 36, 38
Is attached such that when the operating rod 44 of the hydraulic cylinder 42 is in the most contracted state (see FIG. 1), the tip of the link member 36 is oriented vertically upward and the link member 38 is oriented substantially horizontally. When the operating rod 44 is extended most and the lower holding arms 20, 22, 24 are moved downward, the tip of the link member 36 is rotated in the direction away from the support frame 12 and the tip of the link member 38 is moved. The four-legged block A is rotated in a direction approaching the support frame body 12, whereby the lower holding arms 20, 22, 24 are moved downward while the tips (holding portions) are moved in the center direction. The base portions (center portions) of the support legs b, c, and d are configured to be sandwiched from three sides (see FIG. 2).

In the present embodiment, the power unit of each hydraulic cylinder 30, 42 is housed inside the support frame 12 and only the control cable 46 is led out, but the power unit itself is provided outside. It goes without saying that the configuration can also be adopted.

A water jet injection nozzle device 48 is preferably arranged at the tip of each of the lower holding arms 20, 22, 24 so that the water jet direction is directed inward. 48 water supply pipes are connected to an external high pressure water supply device (not shown).

Further, at the center of the bottom portion of the support frame 12, a storage portion 50 for detecting the position of the head leg a of the four-leg block A is formed, and the television camera device 5 is provided in this storage portion 50.
2 and an acoustic sounding device 54, a detecting means is housed and arranged. However, in the housing part 50, an appropriate heating device is provided as a means for eliminating the image pickup lens of the television camera device 52 due to a temperature difference or the like. (Not shown) is preferably provided.

When the four-leg block A is suspended and removed by using the removing device 10 according to the present invention having the above-mentioned structure, the hanging hook of the crane device on land or on the ship is hung on the bracket on the top of the support frame 12. And the position of the head leg a of the four-leg block A is detected by the TV camera device 52 and the acoustic sounding device 54, and then the removal device 10 is positioned and a control signal is sent from the control mechanism to the power unit via the control cable 46. By sending, each clamping arm 14, 1
6, 18, 20, 22, and 24 are appropriately operated to perform a lifting operation for removing the four-legged block A.

In this case, as shown in FIG. 3, in the case of a four-legged block having a good installation posture, the head leg a of this four-legged block A is only clamped by the upper clamping arms 14, 16, 18. Although it can be hung up and removed by using, the procedure is as follows for a four-legged block with a bad installation posture as shown in FIG.

That is, in this case, a predetermined upper holding arm, for example, the tip of the upper holding arm 14 is engaged with the head leg portion a of the four-leg block A, and the upper holding arm 14 is engaged.
While moving the lower holding arms 24 and 26 on the side substantially opposite to the lower holding arms 24 and 26 downward along the outer sides of the other support legs c and d, if necessary, high-pressure water is jetted from the water jet jet nozzle device 48. After removing the soil in the vicinity of the support leg by inserting it with the upper clamping arm 14, the crane is lifted by a crane while adjusting the posture and balance while appropriately rocking in the state of being clamped in cooperation with the upper clamping arm 14, or it is lifted and removed as it is. All you have to do is work.

[0023]

As described above, according to the removing device of the present invention, the four upper holding arms and the three lower holding arms are individually operated by the hydraulic operation mechanism provided separately, respectively.
Since the head leg and the supporting leg of the leg block can be sandwiched respectively, not only can the four-leg block be reliably hung and removed, but also the four legs that are in various postures and intertwined with each other. Even if it is a block, the lower clamping arms are adjacent to each other in cooperation with the water jet nozzle device 4
It has various advantages such as being able to be lifted or slid off in a state where it is properly inserted into the gap with the leg block and properly rectified, and thus the lifting and slinging work can be performed safely and efficiently. is there.

Although the preferred embodiment of the four-legged block removing device according to the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to this embodiment.
For example, it is possible to omit the head and leg position detecting means arranged at the bottom of the support frame to improve the durability by simplifying the structure, to change the curved state of the holding arm as appropriate, and to slide it at the tip. The spirit of the present invention, such as arranging a stop member so that the suspending work can be performed more safely, and further attaching the support frame to an arm member such as a crane device to streamline the suspending and removing work. It goes without saying that various design changes can be made without departing from the range.

[Brief description of drawings]

FIG. 1 is a schematic side view of a four-leg block removal device according to the present invention.

FIG. 2 is a partially omitted side view showing the relationship between the removal device shown in FIG. 1 and a four-legged block.

FIG. 3 is an explanatory diagram of a case where the removal device shown in FIG. 1 holds and hangs a four-legged block having a good posture.

FIG. 4 is an explanatory diagram of a case where the interlocking four-leg block is sandwiched and suspended by the removal device shown in FIG. 1.

[Explanation of symbols]

10 Removal Device, 12 Support Frame, 14 16
18 Upper Clamping Arm 20 22 24 Lower Clamping Arm, 26 Bracket, 28 Axis, 30 Hydraulic Cylinder, 32 Operation Rod, 34 Bracket, 36 38 Link Member, 40
Axis, 42 hydraulic cylinder, 44 operation rod, 46 control cable, 48 water jet injection nozzle device, 50 head and leg position detecting means storage part, 52 TV camera device, 54 acoustic sounding machine,

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hisao Kato 4-3778 Irifune-cho, Niigata City, Niigata Prefecture Niigata Machinery Maintenance Office, First Port Construction Bureau, Ministry of Transport (72) Inventor Yasuhiro Miyata 2 Nishishinjuku, Shinjuku-ku, Tokyo 7-1-1 Nihon Tetrapod Co., Ltd. (72) Inventor Toshio Kondo 2-2-8 Koraku, Bunkyo-ku, Tokyo Goyo Construction Co., Ltd. (72) Inventor Akira Fukuzawa 1-chome, Fukahori-cho, Nagasaki-shi, Nagasaki Prefecture No. 2 1 Sanritsu Nagasaki Kiko Co., Ltd. (56) References Opened 62-77189 (JP, U) Opened 58-102579 (JP, U) Opened Flat 3-18084 (JP, U) Opened 50-2078 (JP, U)

Claims (1)

(57) [Claims] 1. Three lower clamping arms for clamping a predetermined portion of a supporting leg portion other than a head leg portion of a four-leg block on an outer peripheral portion of a supporting frame attached to a cargo handling device such as a crane at equal intervals. And the lower holding arms are pivotally attached to the support frame via a pair of upper and lower link members, and the operation rod ends of the three hydraulic cylinders are also pivotally attached to the support frame at their tail ends. In a device for removing a four-leg block, which is formed by connecting each of the lower clamp arms to the upper end of each lower clamp arm, the head leg of the four-leg block is clamped between two adjacent lower clamp arms disposed on the support frame. Upper clamping arms for the upper holding arms are pivotally attached to the support frame, and the tail end of a hydraulic cylinder provided for each upper clamping arm is pivotally attached to the support frame. And clamp the operation rod end at each upper part Connected to the shoulder portion of the over arm, further removal device of four-legged blocks, characterized in that disposed in the lower portion of the water jet nozzle device of the lower clamping arm.