JP4917530B2 - Fall prevention device - Google Patents

Description

  The present invention provides a drop of transported material installed at the edge of a ship or at the edge of the land facing the waterside so as not to drop the transported material on the water when transporting the transported material such as dredged sand by a bucket on the water. The present invention relates to a prevention device.

  When dredging the sediment on the bottom of the sea, rivers, etc., a method is known in which the dredging target area is surrounded by a pollution prevention curtain, and the area enclosed by the pollution prevention curtain is dredged with a bucket (for example, Patent Document 1, 2). The earth and sand dredged by the bucket is taken up on the water, loaded on the mud of a transport ship arranged adjacent to the dredging target area, and then transferred to a predetermined processing site.

  In this method, since the pollution in water caused by the dredging work is blocked by the pollution prevention curtain, the dredging work can be performed without diffusing the pollution to the outside of the periphery. However, when dredged sand is lifted onto the water with a bucket and then loaded into the mud of a transport ship, the dredged sand in the bucket spills from the bucket. For this reason, when dredged dredged sand falls onto the water outside the area enclosed by the pollution control curtain, the dredged dredged sand causes pollution and diffuses to the outside of the surroundings. It was necessary.

  Here, it is also conceivable to install a surface plate that protrudes outward at the edge of the berth of the transport ship and to incline outwardly from the edge. According to this, dredged soil that spills from the bucket when loaded into the mud of the transport ship can be dropped into the area surrounded by the pollution prevention curtain along the inclined surface plate, so that pollution to the outside of the surroundings is possible. Can be prevented from spreading.

  However, in order to drop the dredged soil that falls from the bucket into the area surrounded by the pollution prevention curtain, such a surface plate must secure a certain length of protrusion from the edge of the installation place. As it is, it will be in the way when the carrier ship berths. Therefore, a new problem arises that it is necessary to remove the surface plate each time the carrier ship comes to berth. In addition, the draft of the transport ship changes depending on the load of dredged soil, and the transport ship moves up and down by waves and the like. Such vertical movement of the transport ship causes a new problem that the surface plate interferes with the float fixed to the upper end of the pollution prevention curtain and damages the peripheral equipment such as the surface plate and float. It was not suitable for conversion.

Such transport of transported materials such as dredged sand and stones by buckets on the water may be performed between the ships or between the ships and the land. In these cases, the same problem as described above occurs.
JP 2002-275932 A JP 2004-68268 A

  The purpose of the present invention is to install a transported object such as dredged sand with a bucket on the water so as not to drop the transported object on the water or on the edge facing the waterside of the land, It is an object of the present invention to provide a fall prevention device for a transported object that does not get in the way when a ship comes to berth and that does not damage peripheral facilities in response to the vertical movement of the ship.

In order to achieve the above object, the fall prevention device of the present invention is provided at the edge of the ship or at the edge of the land facing the waterside when the transfer article is transferred by the bucket on the water, and includes a surface plate. A fall prevention device for a transported object, wherein the surface plate is divided, the divided face plate is turned around a hinge member so that it can be folded, and the fall prevention device is installed at the edge. The divided surface plate is configured to be accommodated by being folded to the edge side of the installation place by a hinge member, and when the divided surface plate is projected outward from the edge of the installation location, the surface plate is A stopper is provided on the outside lower side of the edge of the installation place to prevent it from being inclined more than a predetermined angle.

  Here, when the divided surface plate is projected outward from the edge of the installation place, the side plate can be erected at both ends in the width direction at a position on the upper side of the surface plate. At this time, the side plate can be erected at a mounting angle in the width direction of more than 90 ° and not more than 135 ° so as to open on both sides of the surface plate in the width direction. In addition, the side plate can be erected with a mounting direction mounting angle of more than 0 ° and 45 ° or less so as to be narrower in the outward protruding direction with respect to the surface plate. A string-like body can also be connected to a position that becomes the front end in the protruding direction of the surface plate when the divided surface plate is protruded outward from the edge of the installation place.

According to the fall prevention device of the transfer of the present invention, when transferring the transfer material by a bucket with water, placed at the edge facing the waterside edge or land of the ship, transport material having a surface plate A fall prevention device, wherein the face plate is divided, the divided face plate is turned around a hinge member to be foldable, and the fall prevention device is divided when the fall prevention device is installed at the edge . The front plate is folded to the edge of the installation site by a hinge member so that it can be accommodated. Therefore, when the ship berths, the front plate is folded to the outer side of the installation site by folding it to the edge of the installation site. The projecting length is small, or there is no projecting so that it does not interfere with the berthing.

  In addition, when the divided surface plate is protruded outward from the edge of the installation location, a stopper is provided to prevent the surface plate from being inclined more than a predetermined angle outside the edge of the installation location. The transferred material that falls from the bucket while maintaining a predetermined inclination angle can be dropped into a predetermined region along the surface plate. Therefore, if this predetermined area is an enclosed area that is separated from the outside of the periphery, it is possible to prevent the spread of the contamination to the outside of the periphery caused by the dropped transported material.

  In addition, when the ship moves up and down and the surface plate interferes with other ships and peripheral equipment, the surface plate rotates upward (on the edge side of the installation location) around the hinge member. . As described above, since the surface plate is configured to be able to cope with the vertical movement of the ship, it is possible to prevent the surface plate, the ship and the peripheral equipment from being damaged.

  The fall prevention device of the transferred article of the present invention will be described based on an embodiment in which dredged sand is transferred to a transport ship.

  As illustrated in FIGS. 1 to 4, the fall prevention device 1 (hereinafter referred to as the fall prevention device 1) of the present invention has an upper frame 2 and a lower frame 3 that are formed in a triangular prism shape. The upper surface plate 4 and the lower surface plate 5 are fixed to the upper frame body 2 and the lower frame body 3 by fixing bolts 9a, respectively. As the upper surface plate 4 and the lower surface plate 5, for example, a plywood or the like is used. A fixing means 9 such as a fixing bolt is provided on the bottom surface portion of the upper frame body 2, and the fall preventing device 1 allows the fall prevention device 1 to have an edge on the shore side of the transport ship 16 (such as a soil ship or a trolley). It is detachably fixed to.

  The upper frame body 2 and the lower frame body 3 are connected by a hinge member 6, and the upper surface plate 4 and the lower surface plate 5 are illustrated in FIG. 1 when folded around the hinge member 6. As a result, the two are opposed to each other. On the other hand, when the lower frame 3 is rotated around the hinge member 6 and the lower surface plate 5 is projected outward from the edge of the installation place of the fall prevention device 1, as illustrated in FIG. The upper surface plate 4 and the lower surface plate 5 are inclined to the outside lower side of the edge portion.

  At this time, one side of the lower frame 3 abuts on the heel side, so that the lower surface plate 5 is prevented from inclining by a predetermined angle D or more below the edge of the installation location. That is, here, the lower frame 3 functions as a stopper that prevents the lower surface plate 5 from being inclined at a predetermined angle D or more. The predetermined angle D is set, for example, in a range of 30 ° to 60 ° with about 45 ° as a center.

  On the lower surface plate 5, a rope or a wire such as a rope or a wire is provided via a locking portion 3 a at a position that becomes a tip in the protruding direction when protruding outside the edge of the place where the fall prevention device 1 is installed. One end of the body 8 is connected. This string-like body 8 is used when the lower surface plate 5 is folded to the edge side of the installation place.

  As described above, the fall prevention device 1 has the upper surface plate 4 and the lower surface plate 5 that are divided in the protruding direction with respect to the edge portion of the installation place, and is outside the edge portion of the installation place by the hinge member 6. The lower surface plate 5 that protrudes downward is rotated on the edge side, but is not rotated more than a predetermined angle D on the outer lower side (opposite edge side) of the edge. In this embodiment, the surface plate is divided into two parts of the upper surface plate 4 and the lower surface plate 5, but the surface plate divided into three or more parts is folded and accommodated on the edge side of the installation place by the hinge member 6. You may comprise.

  Next, the usage method of the fall prevention apparatus 1 is demonstrated.

  In the dredging operation, as illustrated in FIG. 6, the dredging target area is surrounded by the pollution prevention curtain 15 so that the water pollution caused by the dredging work is not diffused outside the periphery of the pollution prevention curtain 15. A float 14 is fixed to the upper end of the pollution prevention curtain 15. The work ship 11 and the transport ship 16 are arranged adjacent to the float 14.

  Then, the earth and sand in the area surrounded by the pollution prevention curtain 15 is dredged by the grab bucket 13 by operating the crane 12 of the work boat 11. The earth and sand trapped in the grab bucket 13 is lifted to the water, transferred from the area surrounded by the pollution prevention curtain 15 to the outside of the area, and loaded on the mud 17 of the transport ship 16.

  Therefore, first, as illustrated in FIGS. 1 and 2, the upper frame 2 is fixed to a predetermined position by the fixing means 9 on the edge of the ship 16 on the shore side. At this time, it is preferable to prevent the fall prevention device 1 (lower frame 3) from projecting outward from the edge of the installation location, or to minimize the projection amount.

  Next, when performing the dredging operation, as illustrated in FIGS. 3 and 4, the lower surface plate 5 is projected outward from the edge of the installation place, and the upper surface plate 4 and the lower surface plate 5 are Inclined outward and downward from the edge. Here, for example, the upper surface plate 4 and the lower surface plate 5 are installed at an angle D of about 45 °. In this way, the front end of the lower surface plate 5 in the protruding direction is positioned above the area surrounded by the pollution prevention curtain 15, for example, inside the inner peripheral edge of the float 14. The other end of the string-like body 8 is held on the edge side of the transport ship 16.

  Next, as illustrated in FIGS. 5 and 6, the area surrounded by the pollution prevention curtain 15 is dredged by the grab bucket 13, and the grab bucket 13 is moved above the fall prevention device 1 so that dredged soil is removed from the transport ship 16. Load it in the mud. After the dredged sand is loaded on the mud 17, the grab bucket 13 is returned to the area surrounded by the pollution prevention curtain 15 so as to move above the fall prevention device 1. In this way, the grab bucket 13 is moved over the fall prevention device 1 to perform the dredging operation.

  At this time, the dredged sand S inside the grab bucket 13 falls down on the upper surface plate 4 and the lower surface plate 5, but the upper surface plate 4 is fixed at an inclination of a predetermined angle D by the upper frame 2. The lower surface plate 5 is not inclined more than the predetermined angle D by the lower frame 3 to the lower outside of the edge of the installation place. Therefore, the dredged sand S falling from the grab bucket 13 falls along the upper surface plate 4 and the lower surface plate 5 into the region surrounded by the pollution prevention curtain 15. As a result, it is possible to prevent the diffusion of the contamination to the surrounding outside by the dredged soil S that has fallen from the grab bucket 13.

  The upper surface plate 4 and the lower surface plate 5 are replaced with new ones according to the degree of dirt, the degree of damage, or the like. This replacement can be easily performed by the fixing bolt 9a.

  The draft of the transport ship 16 changes depending on the loading amount of dredged soil and moves up and down by waves and the like. Thus, when the transport ship 16 moves up and down and the lower surface plate 5 (lower frame 3) interferes with the float 14, the lower surface plate 5 (lower frame 3) is centered on the hinge member 6. Can be turned to the edge side of the installation place. Thus, since the lower surface plate 5 (lower frame 3) can be adapted to the vertical movement of the transport ship 16, damage to peripheral equipment such as the lower surface plate 5, the lower frame 3 and the float 14 is caused. Can be prevented.

  Moreover, when bringing the transport ship 16 to the shore, by pulling the other end portion of the string-like body 8 from above the transport ship 16, the lower surface plate 5 is placed on the edge side of the installation place as illustrated in FIGS. Rotate to fold and house. Thereby, the protrusion length to the edge part outer side of the installation place of the lower surface board 5 is small, or there is no protrusion, and it does not become a hindrance to berthing. Therefore, it is not necessary to remove the fall prevention device 1 each time the transport ship 16 is brought into berth.

  The lower frame 3 may be formed in a planar shape as illustrated in FIG. 7, and in this case, the stopper 7 protrudes from the planar lower frame 3. When the stopper 7 protrudes the lower surface plate 5 outward from the edge of the installation place, the stopper 7 contacts the shore side of the transport ship 16, and the lower surface plate 5 has a predetermined lower side outside the edge. Inclination beyond the angle D is prevented. Further, when the lower surface plate 5 is projected outward from the edge of the installation place, the other end of the string-like body 8 is fixed to the edge side of the transport ship 16 and the string-like body 8 is tensioned. Thus, the stopper 7 can be functioned.

  As illustrated in FIGS. 8 and 9, side plates 10 a can be erected at both ends in the width direction of the upper surface plate 4. When this side plate 10a is erected at a width direction mounting angle S1 of more than 90 ° and not more than 135 ° so as to open on both sides in the width direction with respect to the upper surface plate 4, the dredged sand S that has fallen from the grab bucket 13 is It becomes easy to collect on the face plate 4 and the lower surface plate 5. The width direction attachment angle S1 may be 90 °.

  Further, at both ends in the width direction of the upper surface plate 4, as illustrated in FIGS. 10 and 11, the upper surface plate 4 may be provided with portions 4 a protruding in the triangular width direction, and the side plate 10 b may be erected. it can. When the side plate 10b is erected at a projection direction mounting angle S2 of more than 0 ° and 45 ° or less so as to be narrower in the outward projection direction with respect to the upper surface plate 4, the side plate 10b is placed on the upper surface plate 4 and the lower surface plate 5. The collected dredged sand S can be easily dropped into the region surrounded by the pollution prevention curtain 15 without being scattered. This protrusion direction attachment angle S2 may be 0 °.

  Further, as illustrated in FIGS. 10 and 11, the side plate 10a having the width direction mounting angle S1 greater than 90 ° and not greater than 135 ° illustrated in FIGS. 8 and 9 has a protrusion direction mounting angle S2 of greater than 0 ° and not greater than 45 °. It is also possible to stand on the upper surface plate 4.

  In the embodiment, the scissors by the grab bucket 13 have been described as an example, but the present invention can also be applied to the scissors by the backhoe bucket. In addition to dredged material sand S, stones, gravel, various powders, granular materials and the like can be exemplified as the transferred material transferred by the bucket.

  The fall prevention device 1 of the present invention can also be used when transferring a transfer object by a bucket between a ship or between a ship and land. When transporting a transported object between ships, such as so-called settling, the fall prevention device 1 is installed at the edge of one ship (the ship with the higher vertical position). As a result, the transferred material that spills from the bucket can be dropped into the other ship to prevent it from falling onto the water and to prevent the diffusion of the contamination to the outside of the periphery. When the ship on which the fall prevention device 1 is installed comes to berth, as described above, the lower surface plate 5 is rotated and accommodated to the edge side of the installation location so that it does not get in the way. Moreover, since the lower surface plate 5 rotates to the edge side of the installation location even when the other ship interferes, it is possible to prevent damage to the lower surface plate 5 and the ship.

  When transferring a transported object between a ship and land (such as a quay), the fall prevention device 1 is installed on the higher one of the upper and lower positions. For example, when the vertical position of the land is higher than that of the ship, by installing the fall prevention device 1 at the edge facing the waterside of the land, the transferred material falling from the bucket can be dropped into the ship. . In addition, when the vertical position of the ship is higher than the land, by installing the fall prevention device 1 at the edge of the ship, the transferred material falling from the bucket can be dropped onto the land. In this way, it is possible to prevent the transferred object from falling onto the water and to prevent the diffusion of the contamination to the outside of the periphery. The point that the fall prevention device 1 does not get in the way when the ship comes to berth and the point that the surface plate, ship, and peripheral equipment can be prevented from being damaged are as described above.

It is a side view which illustrates the state which folded the lower surface board of the fall prevention apparatus of this invention. It is a front view of FIG. It is a side view which illustrates the state which opened the lower surface board of FIG. FIG. 4 is a front view of FIG. 3. It is a side view which illustrates the state of dredging work. It is a top view which illustrates the state of dredging work. It is a side view which illustrates another fall prevention device of the present invention. It is a front view which illustrates another fall prevention device of the present invention. It is AA sectional drawing of FIG. It is a front view of the fall prevention apparatus which shows the modification of the side plate of FIG. It is BB sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fall prevention apparatus 2 Upper frame 3 Lower frame 3a Locking part 4, 4a Upper surface plate 5 Lower surface plate 6 Hinge member 7 Stopper 8 String-like body 9 Fixing member 9a Fixing bolt 10a, 10b Side plate 11 Work ship 12 Crane 13 Grab bucket 14 Float 15 Anti-pollution curtain 16 Transport ship 17 Mud

Claims (5)

When transferring the transfer material by a bucket with water, placed at the edge facing the waterside edge or land of the ship, an anti-fall device of the transfer material having a surface plate, dividing the surface plate Then, the divided surface plate is turned around the hinge member so that it can be folded, and when the fall prevention device is installed on the edge, the divided surface plate is placed on the edge side of the installation place by the hinge member. When the divided surface plate is projected outward from the edge of the installation location, the surface plate is inclined more than a predetermined angle below the edge of the installation location. An apparatus for preventing a fall of a transported article, characterized in that a stopper is provided to prevent it.   The fall of the transported article according to claim 1, wherein side plates are erected at both ends in the width direction at a position on the upper side of the surface plate when the divided surface plate is projected outward from the edge of the installation place. Prevention device.   The fall prevention device for a transported article according to claim 2, wherein the side plate is erected at a width direction mounting angle of more than 90 ° and not more than 135 ° so as to open on both sides of the surface plate in the width direction.   The fall prevention device for transported objects according to claim 2 or 3, wherein the side plate is erected at a projection direction mounting angle of more than 0 ° and 45 ° or less so as to become narrower in the outward projection direction with respect to the surface plate.   The transfer according to any one of claims 1 to 4, wherein a string-like body is connected to a position that becomes a front end portion of the surface plate in the protruding direction when the divided surface plate is protruded outside the edge of the installation place. Anti-drop device.

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