JP6553364B2 - Receiving ship - Google Patents

Description

  The present invention relates to a technique for exploring foreign matter contained in accumulated earth and sand.

  An example of the work procedure when dredged soil is used as landfill material is as follows. Is pumped from the bottom to the bottom of the water. However, foreign matter (cement lumps, wood chips, metal pieces, dust, etc.) may be mixed in the clay, and since the clay containing foreign matter is not suitable for use as a landfill material, it is dropped from the earth transportation vessel It is necessary to check for the presence of foreign matter in the dredged material before starting. In the past, a worker had plunged a rod from the periphery of a cargo ship ship's hold to search for foreign objects, but with this method, it was only possible to search within the reach of the rod, and the rod was plunged obliquely downward Therefore, it is difficult to accurately grasp the position of the foreign matter. In the case of the earth transportation ship which drops the clay by opening and closing the bottom of the hold disclosed in Patent Documents 1 and 2, etc., the bottom of the hold has a sloped portion from the weir side to the central part. It is difficult to judge the existence or the position.

JP-A-7-69278 JP-A-11-109687

  Therefore, the present invention provides a technology capable of searching for foreign matter contained in deposited sediment.

The present invention provides a receiving part for receiving an earth ship having a hold where sand and sand dredged from the bottom of the water are released and the upper part is released, a holding body, and the holding body is positioned above the receiving part. A first moving mechanism for supporting the holding body and moving the holding body horizontally at a position above the receiving portion, and held by the holding body so as to be vertically movable with respect to the holding body A search device for foreign matter contained in the earth and sand, comprising a plurality of bars and a plurality of bars that descend by their own weight from a height that does not contact the earth and sand deposited on the previous earth transport ship and penetrate into the earth and sand. Provide a receiving ship with .

  According to the present invention, it is possible to search for foreign substances contained in the accumulated earth and sand.

FIG. The figure which shows the state which installed the portal structure 2 and the holding body 3 on the receiving ship 1. FIG. FIG. FIG. 6 is a view showing a third moving mechanism 41. FIG. The figure which shows the horizontal movement of the holding body 3. FIG. The figure which shows the horizontal movement of the Y-axis direction of the holding body. The figure which shows the modification of the lower end of the stick | rod 4. FIG.

Embodiment
An exemplary embodiment of the present invention will be described.
FIG. 1 is a diagram showing a search device 100. As shown in FIG. The exploration device 100 includes a receiving ship 1, a portal structure 2, and a holding body 3. FIG. 2 is a view showing a state in which the portal structure 2 and the holding body 3 are installed on the receiving ship 1. In the illustrated receiving ship 1, the upper right is the stern and the lower left is the bow. In the coordinate system used in the following description, the horizontal coordinate axis parallel to the center line of the receiving ship 1 is the X axis, the horizontal coordinate axis perpendicular to the X axis is the Y axis, and the vertical coordinate axis is the Z axis. And Therefore, the XY plane is a horizontal plane. Further, the direction from the stern to the bow is taken as the + X direction, the direction from the starboard to the port is taken as the + Y direction, and the upward direction is taken as the + Z direction.

  The receiving ship 1 is anchored at a position adjacent to the planned reclamation area, and receives the earth transportation vessel in the receiving unit 11 provided at the center of the hull. The receiving portion 11 is formed in a U-shape in which the bow side is opened in a plan view, and the earth transportation boat enters the receiving portion 11 from the bow side of the receiving vessel. The bottom of the receiving unit 11 is not provided, and the clay loaded on the earth transportation vessel is dropped on the bottom of the water below the receiving unit 11. The dumped clay is pumped to the bottom of the planned water area by a pump provided to the receiving vessel 1.

  The portal structure 2 includes a girder 21 and a support 22. The girder 21 has a Y-axis direction as a longitudinal direction, and both ends thereof are supported by a support 22. Parallel rails 13 extending in the X-axis direction are provided on the starboard and port sides of the deck 12. A wheel (not shown) corresponding to the rail 13 is provided at the lower end of the support column 22, and the portal structure 2 travels in the X-axis direction. A traverse rail 23 extending in the Y-axis direction is provided on the upper surface of the beam 21. A wheel 32 corresponding to the traversing rail 23 is provided at the bottom of the carriage 31 for suspending the holding body 3 (see FIG. 3), and the carriage 31 travels in the Y-axis direction. As power for driving the portal structure 2 and the carriage 31, any power such as traction by a winch or driving of a wheel by a motor may be used. The portal structure 2, the rails 13, and the carriage 31 constitute a first moving mechanism 20 having the same function as a club trolley type portal (bridge) crane. The first moving mechanism 20 supports the holding body 3 so as to position the holding body 3 above the area (the hold of the earth transportation ship) where the dredged soil is deposited, and moves the holding body 3 in the horizontal direction.

  FIG. 3 is a view showing the holding body 3. The holding body 3 includes a bottom plate 33 and a support column 34 standing at the center of the bottom plate 33. A second moving mechanism 35 is provided at the bottom of the carriage 31. The second moving mechanism 35 moves the holder 3 in the vertical direction (Z-axis direction) by moving the column 34 in the vertical direction (Z-axis direction). The second moving mechanism 35 is, for example, a hydraulic cylinder or an electric actuator. The holder 3 is provided with a fence 36 for preventing the worker from falling when the worker gets in.

  The holding body 3 is provided with a plurality of bars 4. The plurality of rods 4 are held by the holder 3 and are movable in the vertical direction with respect to the holder 3. The plurality of rods 4 are held by the holder 3 with different coordinates on the horizontal plane. The rod 4 is a member made of resin, metal or the like, and has a rigidity that does not cause bending when the lower end thereof collides with a foreign substance in the clay. In this example, although five rods 4 are provided on the starboard side and port side of the holding body 3 respectively, the number of the bars 4 provided on the holding body 3 may be any number. The intervals between the X direction and the Y direction of the plurality of bars 4 are preferably equal. It is desirable that the upper end of the rod 4 be processed to enhance the visibility of the upper end. For example, a portion about several cm from the upper end may be colored in a color different from that of the other portions, or a light emitting body such as a light emitting diode may be provided at the upper end.

  FIG. 4 is a diagram showing the third moving mechanism 41 (enlarged view of part A in FIG. 3). The holder 3 is provided with a third moving mechanism 41 for moving the rod 4 in the vertical direction. Specifically, a support 42 is provided on the upper surface of the bottom plate 33, and a small winch 43 is provided on the upper end of the support 42. One end of a rope 44 wound around a winch 43 is connected to the upper end of the rod 4, and the rod 4 is suspended by the rope 44 with the longitudinal direction as the vertical direction (Z-axis direction). When the winch 43 winds the rope 44, the rod 4 ascends, and when the winch 43 draws the rope 44, the rod 4 descends.

  FIG. 5 is a view showing the guide member 45 (an enlarged view of a portion B in FIG. 3). The holding body 3 is provided with a guide member 45 that guides the moving direction of the bar 4. Specifically, the guide member 45 is provided at the side end of the bottom plate 33 of the holder 3, and the rod 4 is passed through the space formed between the bottom plate 33 and the guide member 45. This space has a cross section slightly larger than the cross section of the rod 4 so that no frictional resistance occurs between the bottom plate 33 and the guide member 45 and the rod 4. Therefore, the rod 4 is movable in the vertical direction, and the swing of the rod 4 is suppressed.

  The holding body 3 is provided with a control device 5 for transmitting control signals to the first moving mechanism 20, the second moving mechanism 35 and the third moving mechanism 41. The control device 5 includes, for example, a keyboard for inputting the movement distance and instructing start or stop of movement, and the worker moving into the holding body 3 operates the control device 5 to operate the first movement mechanism 20 and the first movement mechanism 20 The second moving mechanism 35 and the third moving mechanism 41 are controlled.

  Next, the mechanism of foreign object search by the search apparatus 100 will be described. The clay of the ship is loaded with dredged soil. The clay may be contaminated with foreign matter (cement lumps, wood pieces, metal pieces, dust, etc.). Since the clay is mainly sludge (a mud consisting of organic matter deposited on the bottom of the water), when the rod 4 is lowered by the winch 43, the lower end of the rod 4 penetrates into the clay by its own weight. The penetration depth depends on the composition and condition of the clay, and the lower end may or may not reach the bottom of the hold, but when no foreign matter is mixed in the clay, the holding body 3 The depths at which the lower ends of the plurality of rods 4 held in are penetrated are substantially the same. In the present embodiment, the worker observes the height of the upper end of the rod 4, but when foreign matter is not mixed in the clay, the heights of the upper ends of the plurality of observed rods 4 become substantially the same. . On the other hand, when foreign matter is mixed in the clay, when the lower end of the rod 4 strikes the foreign matter, the height of the upper end of the rod 4 is higher than the height of the upper ends of the other rods 4 Therefore, it can be determined that there is a possibility that foreign matter is present at the position of the rod 4. In the following description, when the lower end of a certain rod 4 abuts against a foreign object, the height of the upper end of the rod 4 becomes higher than the height of the upper end of the other rods 4, which is called "high stop".

Next, the procedure of the foreign substance search by the search device 100 will be described.
FIG. 6 is a view showing the horizontal movement of the holder 3. The figure is a plan view showing a state where the earth transportation vessel 6 is made to approach the receiving portion 11 of the receiving vessel 1, and the upper side of the figure is the stern side of the receiving vessel 1. The earth-handling ship 6 includes a hold 61 whose upper portion is opened, and the dredged clay is loaded on the hold 61. The upper left corner of the hold 61 of the cargo ship 6 is defined as the initial position of the holder 3, and the coordinates on the horizontal surface of the holder 3 are represented by the movement distance in the X axis direction and Y axis direction with respect to the initial position. Moreover, a unique number (1 to 10 in this example) is assigned to each bar 4 in advance. The coordinates of the foreign matter are represented by a combination of the coordinates of the holder 3 on the horizontal plane and the number of the rod 4 stopped high.

  When the earth moving ship 6 enters the receiving unit 11 of the receiving ship 1, the holder 3 is horizontally moved to the initial position by the first moving mechanism 20. Next, the holding body 3 is lowered by the second moving mechanism 35 at the initial position. The height to which the holding body 3 is lowered is such a height that the bottom plate 33 of the holding body 3 does not contact the clay. Next, all the bars 4 are lowered by the third moving mechanism 41. If the descent of the bar 4 stops, the presence or absence of the bar 4 stopped at a high level is visually checked, and if there is a bar 4 stopped at a high level, the coordinates of the bar 4 are recorded. Next, the rod 4 is raised by the third moving mechanism 41, and the holder 3 is horizontally moved to the next searching position by the first moving mechanism 20.

  FIG. 7 is a diagram illustrating horizontal movement of the holding body 3 in the Y-axis direction. White circles indicate the bars 4 before horizontal movement, and black circles indicate the bars 4 after horizontal movement. The distance d is the distance between the bars 4 in the Y-axis direction. The example of FIG. 7A is an example in which the holder 3 is horizontally moved by a distance 2 d in the + Y direction. The example shown in FIG. 7B is an example in which the holder 3 is horizontally moved by a distance d / 2 in the + Y direction. In this case, the search is performed at twice the density in the Y-axis direction as compared to the example of FIG. 7A.

  When the holder 3 is moved horizontally, the rod 4 is lowered again to conduct a search. The search and the horizontal movement are repeated along the route shown in FIG. When the search of the entire hold 61 is completed, the second moving mechanism 35 raises the holder, and the first moving mechanism 20 horizontally moves the holder to the initial position. In addition, the initial position of the holding body 3, the path | route of horizontal movement, and the distance moved horizontally at once are not limited to this example.

According to the present embodiment, since the presence and the position of the foreign matter can be determined only by observing the heights of the upper ends of the plurality of rods 4, the foreign matter contained in the clay can be easily searched.
Further, since the plurality of bars 4 are held by the holding body 3 with the coordinates on the horizontal plane being different from each other, it is possible to easily determine the presence and position of foreign matter by comparing the heights of the upper ends of the plurality of bars 4. Can do.
In addition, even when there is a portion inclined at the bottom of the hold 61 of the earth moving ship 6 from the weir side toward the center, the presence or the position of the foreign matter can be easily determined.
Further, by horizontally moving the holding body 3 using the first moving mechanism 20, it is possible to search the entire hold 61 of the clay ship 6.

<Modification>
The above embodiment may be modified as follows. A plurality of modified examples may be combined.
<1>
The searching device 100 may be provided with recording means for recording the coordinates of the holder 3 or the rod 4 in the horizontal plane. For example, a computer is connected to the control device 5, and the computer adds the X coordinate and the Y coordinate input to the control device 5 to the coordinates of the origin with the initial position of the holder 3 as the origin and holds it after horizontal movement. Calculate body coordinates and record the calculated coordinates. Then, the worker inputs the number of the stopped rod 4 into the computer and records the number in association with the coordinates of the holder.

<2>
When the lower end of the plurality of bars 4 is inserted into the clay, the recording means described above is used when the position of one bar 4 in the vertical direction is higher than the position of the other bar 4 in the vertical direction. The coordinates of the bar 4 on the horizontal plane may be recorded. For example, the height of the upper end of the rod 4 may be automatically measured, and the computer may determine whether the height of the rod 4 is high based on the height, and may record the coordinates of the rod 4 determined to be high. . The determination of the high stop is made, for example, when the heights of the upper ends of a plurality of bars 4 are compared with each other, and the height of the upper end of a certain bar 4 exceeds the height of the upper end of another bar 4 by a predetermined value or more. The foreign matter may be determined to be present at the position of the rod 4. You may measure the height of the upper end of the stick | rod 4 using a satellite navigation system, an optical surveying instrument, etc.

<3>
The rod 4 may be powered down. For example, an electric actuator or the like may be provided instead of the winch 43 constituting the third moving mechanism 41 so as to forcibly push the rod 4 into the clay. According to this configuration, foreign matter can be probed even in the case of a clay having a property that the rod 4 is difficult to penetrate only by its own weight.

<4>
The holding body 3 holding a plurality of rods 4 may be provided on a quay near the planned landfill area. For example, the ship 6 is moored on a quay, and the holding body 3 is attached to the tip of an arm of a heavy machine (hydraulic excavator, aerial work vehicle, etc.) having a plurality of jointed arms. The second movement mechanism 35 may be used to search for foreign matter.
In addition, foreign matters such as waste may be buried in naturally accumulated sediment. For example, the present invention is suitable for exploring foreign matter in places where riverbeds are relatively flat, such as rivers, irrigation canals, and drainage canals in urban areas. That is, the present invention is not limited to the search for foreign substances contained in dredged soil, but can also be applied to the search for foreign substances contained in naturally deposited earth and sand.

<5>
The control device 5 may be provided on the deck 12 of the receiving ship 1. In this case, the operator may operate the control device 5 on the deck 12 and observe the position of the rod 4 from the deck 12. Further, instead of the operator operating the control device 5, the computer controls the first moving mechanism 20, the second moving mechanism 35, and the third moving mechanism 41 to maintain the holder according to the movement amount and the movement direction determined. You may make it move 3 and the stick 4.

<6>
A scale representing the distance in the longitudinal direction may be provided on the surface of the bar 4. The scale is preferably highly visible, such as, for example, a surface in which the surface of the bar 4 is painted with different colors for each predetermined length.

<7>
It is not essential to specify the bar 4 that has stopped at a high level, and only the coordinates of the holding body 3 may be specified. This is because the position of the foreign matter can be roughly specified by the coordinates of the holding body 3.

<8>
FIG. 8 is a view showing a modification of the lower end of the rod 4. The rod 4A is an example in which the lower end is formed in a tapered shape. If the lower end of the rod 4 stays near the surface of the dredged soil because the dredged soil is hard, it is difficult to search for foreign matter. This makes it easier to search for foreign objects even when the clay is hard.
The rod 4B is an example in which the lower end is formed in a tapered shape. According to the rod 4B, the area of the lower end is larger than that of the rod 4 of uniform cross section, so that a wide range of exploration can be performed compared to the rod 4 in one penetration process. The rod 4B is suitable when the clay is soft.

  The rod 4C is an example in which the lower end is formed in a net shape. The rod 4B has a lower end area larger than that of the rod 4 and therefore is less likely to penetrate the clay, but according to the rod 4C, the particles and moisture of the clay pass through the mesh, so the lower end is smaller It becomes easy to penetrate the dredged soil. The size of the mesh is set to such an extent that the assumed foreign matter does not pass through the mesh.

  The rod 4C also has the following effects. After the lower end of the lowered rod 4 strikes the foreign object, if the rod 4 further descends while pushing the foreign object aside or if the rod 4 shakes laterally and passes by the side of the foreign object, the foreign object is found It may not be possible. On the other hand, since the lower end of the rod 4C is easily retained on the surface of the foreign matter due to its mesh-like shape compared to the rod 4, the foreign matter is easily detected because the lower end is not easily displaced from the foreign matter. Also, even if foreign matter passes through the mesh when rod 4C is penetrated into the clay, if foreign matter is caught in the mesh when pulling up rod 4C to a position higher than the water surface, foreign matter visually It will be possible to discover

  The rod 4D is an example in which the lower end is formed in a comb shape. According to the rod 4D, since the particles and moisture of the clay flow out laterally from between the teeth of the comb, the lower end is more likely to penetrate the clay compared to the rod 4B. The spacing between the teeth of the comb is set to such an extent that the assumed foreign matter does not get caught between the teeth. Further, since the lower end of the rod 4C is easily retained on the surface of the foreign matter due to its comb shape compared to the rod 4, the foreign matter is easily detected since the lower end is not easily displaced from the foreign matter.

  One of the rods 4, 4A, 4B, 4C, 4D may be selected and attached to the holder 3 in accordance with the properties of the clay. Further, attachments of the shapes of the rods 4A, 4B, 4C, 4D may be selected and attached to the lower end of the rod 4 in accordance with the properties of the clay. Alternatively, a plurality of types of rods 4C having different mesh sizes may be prepared, and the rods 4C may be selected according to the size of the foreign matter. Further, it is possible to prepare a plurality of types of rods 4D having different intervals of the comb teeth, and to select the rods 4D according to the size of the foreign matter.

100 exploration equipment, 1 receiving vessel, 11 receiving parts, 12 decks, 13 rails, 2 portals, 20 first moving mechanism, 21 girder, 22 columns, 23 traverse rails, 3 holders, 31 carts, 32 wheels, 33 bottom plate, 34 columns, 35 second movement mechanism, 36 fences, 4 bars, 41 third movement mechanism, 42 columns, 43 winches, 44 ropes, 45 guiding members, 5 control devices, 6 earth transportation vessels, 61 ship holds

Claims (1)

A receiving part for receiving an earth transport ship having a hold where the sand dredged from the bottom of the water is deposited and the upper part is released;
A holder, and a first moving mechanism for supporting the holder so that the holder is positioned above the receiving portion, and moving the holder horizontally at a position above the receiving portion; A plurality of bars that are held by the holding body and are movable in the vertical direction with respect to the holding body, and are lowered by their own weight from a height that does not contact the earth and sand accumulated on the earth ship, and are moved to the earth and sand. A receiving ship having a foreign object exploration device included in the earth and sand, comprising a plurality of penetrating bars.

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