JP2009197547A - Boom - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a boom which is of a simple structure and yet to allow a work vessel to quickly pass through. <P>SOLUTION: A series of at least two or more floats are made into sink-float floats 6, each of which has a buoyancy chamber 6b disposed therein. At both lateral ends of the buoyancy chamber 6b, communication holes 6c and 6d communicating with the outside are formed in such a way that one of the communication holes 6c and 6d is located on the upper end while the other of the same is located on the lower end. The sink-float floats 6 are thus arranged so that adjacent communication holes 6c and 6d are reverse to each other in vertical position. Adjacent communication holes 6c and 6d are connected to each other via a pipe 11. Among the series of sink-float floats 6, a sink-float float 6 located at an end of the series and having the lower end communication hole 6d connected to adjacent upper end communication hole 6c via the pipe 11 supplies and sucks air through the upper end communication hole 6c of the sink-float float 6. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a net for capturing drifting objects on the surface of water such as driftwood and dust, and protecting dam facilities such as levee bodies and gates and downstream environments from these drifting substances.

  The conventional netting field has a float part in which a plurality of barrel-shaped resin floats capable of enclosing air inside are connected in series in a lateral direction, and suspended over the entire length of the float part. It consists of a net that captures drifting objects such as garbage. A weight chain is attached to the lower end of the net to prevent it from rolling up due to waves or water flow.

  This net is moored at anchors installed on both sides of the dam lake, and the float is placed on the surface of the dam lake floating on the water surface. By capturing and blocking driftwood such as driftwood and dust that has flown from the upstream, damage to dam facilities and environmental damage in the downstream area due to drifting are prevented.

  In such a net place, a dedicated ship gate is provided so that a work ship such as a ship for collecting drifting objects can go back and forth between the upstream side and the downstream side of the net place. Passage gates are provided at one or more places in the net, and are equipped with doors that can be easily pushed open by work vessels. The doors are attached one by one to a pair of struts on the left and right sides of a U-shaped frame that floats on the water surface with a float installed, and a locking device is provided to prevent inadvertent opening. ing. The locking device can be easily unlocked by bringing the work ship into contact with the unlocking operation unit, and when the work ship is advanced as it is, the door can be pushed open to pass (for example, Patent Document 1). reference).

Another type is a net that allows a work ship to pass along a pair of guide members suspended in water by moving up and down a part of the net to which a floating float is attached. The field is also known (see, for example, Patent Document 2).
JP-A-2005-201001 (pages 6-8 and FIGS. 2 and 3) JP 2007-39950 A (pages 3 to 4 and FIGS. 1 and 4)

  However, since the structure of a net with a passing gate as described above is complicated, it takes time to manufacture and install the site.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a net that allows a work vessel to pass quickly while having a simple structure.

  In order to solve the above-mentioned problem, the net according to claim 1 is a floating object in which a plurality of floats are arranged at intervals in the horizontal direction and are floated on the water surface, and a weight is provided at the lower end. In a net field in which a net for catching is suspended, at least two or more continuous floats are made to float and sink, and a buoyancy body chamber is provided inside these floats. At both ends in the lateral direction of the buoyancy body chamber, communication holes communicating with the outside are arranged in a state where one is positioned at the upper end and the other is positioned at the lower end. And each floating float is arranged so that the position of the adjacent communication hole is upside down, the adjacent communication holes are connected by a pipe, located at the end of the continuous floating float, and In addition, air is supplied and sucked through the connection hole at the upper end of the float / float float connected to the communication hole adjacent to the communication hole at the lower end and the pipe.

  The network according to claim 1 is located at an end of the continuous floating float and the connection hole at the upper end of the floating float connected to the communication hole adjacent to the communication hole at the lower end by the pipe. When the air is sucked through, the buoyancy body chambers of the floating and floating floats that are in communication with each other have a negative pressure. Then, water flows in from the communication hole at the lower end of the floating float located on the opposite side of the floating float that sucks air, the buoyant body chamber of each floating float is filled with water, and each floating float is Loses buoyancy and sinks into the water. When sinking, water flows into the buoyancy body chamber through the communicating hole at the lower end, so that each floating float sinks in an inclined state with the communicating hole at the lower end down. As a result, in the buoyancy body chamber of the float / sink float inclined obliquely, the communication hole at the upper end is positioned at the uppermost position, so that air in the buoyancy body chamber can be discharged without remaining.

  On the other hand, when air is supplied, the buoyancy body chambers of the floating and floating floats are filled with air, and the floating and floating floats obtain buoyancy and float on the water surface. When floating, air flows into the buoyancy body chamber through the communication hole at the upper end, so that each floating float floats in an inclined state with the communication hole at the upper end facing upward. As a result, in the buoyancy body chamber of the floating float that is inclined, the communication hole at the lower end is positioned at the lowest position, so that water in the buoyancy body chamber can be discharged without remaining.

  As described above, since air in and out of the buoyancy body chamber can be supplied and discharged without leaving air or water, the floating and floating of the floating and floating float can be quickly and reliably performed. In addition, since the hinged door and the slide gate are not provided as in the prior art, the structure is not complicated.

  In addition, with at least two or more continuous floats, the float type means that all the floats constituting the float are floated type, and the float type and fixed type (a type that always floats on the water surface). This means that it can be configured with two types of floats.

  The screen according to claim 2 is characterized in that a fixed auxiliary float is provided above each floating float.

  According to the net of claim 2, the floating float sinking in water is in a state where the communication hole at the upper end is located directly above when viewed from the side by the weight of the trapping net, in other words, the Although the communication hole is located directly below, the provision of the auxiliary float makes it easier to maintain this state. Therefore, it is possible to effectively prevent air and water from remaining in the buoyancy body chamber.

  The screen according to claim 3 is characterized in that the auxiliary float is provided on the side where the communication hole is arranged at the upper end from the lateral center of the float and sink float.

  According to the third aspect of the present invention, the submerged float is submerged in an inclined state with the upper communicating hole on the upper side and the lower communicating hole on the lower side. And water can be discharged smoothly.

  According to a fourth aspect of the present invention, the float of the float portion is composed of a floating float and a fixed fixed float, and the floating float and the fixed float are color-coded.

  According to the fourth aspect of the present invention, it is possible to easily confirm the location through which the work ship passes by color-coding the floating float and the fixed float.

  Since the net according to claim 1 can discharge water or air in the buoyancy body chamber without leaving it, the floating float can be smoothly and reliably suspended. As a result, it is possible to quickly pass the work boat. In addition, since the structure is simple, the manufacturing cost can be reduced, and the labor required for installation can be reduced.

  Since the net according to claim 2 can prevent water or air from remaining in the buoyancy body chamber more effectively, the effect of the net according to claim 1 is promoted.

  According to the third aspect of the present invention, the floating and floating floats can be quickly settled and lifted, and the work ship can be quickly bored.

  Although the net of claim 4 has a simple structure, it can promptly pass a work ship.

  DESCRIPTION OF EMBODIMENTS Embodiments of a network according to the present invention will be described below with reference to FIGS.

  FIG. 1 is a front view showing an outline of the installed state of the net place 1. The net place 1 is arranged so as to cross the dam lake D, and both ends are moored to anchors 2 installed on each shore, respectively. ing.

  As shown in FIG. 2, the network 1 mainly includes a float unit 7 in which a plurality of floats 5 (6) are arranged at predetermined intervals in the horizontal direction and are floated on the water surface, and the float unit 7. The catching net 8 (hereinafter also referred to as the lower catching net 8) for catching drifting objects such as driftwood and dust flowing from the upstream is suspended.

  Each float 5 (6) of the float portion 7 is formed in a barrel shape that is placed horizontally using a hard resin, that is, in a cylindrical shape with both ends closed, and at both ends in the horizontal direction, an upper portion and a lower portion. Each of the plate-like connecting pieces 5a (6a) is provided in a vertically oriented state.

  The floats 5 (6) are arranged at a predetermined interval in the horizontal direction between a pair of main ropes 3, 4 (upper main rope 3, lower main rope 4) arranged in parallel in the vertical direction. The rope 3 is connected with two upper connecting pieces 5a (6a) and the lower main rope 4 with two lower connecting pieces 5a (6a). And between each float 5 (6), in order to prevent that a drifting substance flows out to the downstream from the inside, the upper capture | acquisition net | network 9 is stretched.

  A lower capturing net 8 is attached to the lower main rope 4 of the float portion 7 having such a configuration at the upper end portion and is suspended. At the lower end of the lower catching net 8, a short weight chain 10 is attached laterally to a portion located below each float 5 (6). The upper capturing net 9 and the lower capturing net 8 are nets having a lattice-like mesh made of a chemical fiber such as polyester or polyethylene.

  The float 5 (6) of the float portion 7 is composed of a fixed float 5 (also referred to as a fixed float 5) and a float-and-sink float 6 (also referred to as a float / float float 6). All except the float 6 are fixed floats 5.

  The fixed float 5 is filled with foamed polystyrene and is always floating on the water surface. On the other hand, the float / float float 6 has a buoyancy body chamber 6b inside (see FIG. 3), and the air is supplied to the buoyancy body chamber 6b, or the air is discharged and exchanged with water. It is possible. Air can be supplied and discharged through communication holes 6c and 6d provided at both lateral ends of the buoyancy body chamber 6b and communicating with the outside. One of the communication holes 6c and 6d is positioned at the upper end and the other is positioned at the lower end, and the communication holes 6c and 6d on both sides are disposed so as to be opposite in the vertical direction.

  Two such floating floats 6 are continuously arranged, and the positions of the adjacent communication holes 6c and 6d are arranged upside down. For the sake of convenience, the right side in the figure will be called the right floating float 6 and the left side will be called the left floating float 6.

  The right floating float 6 and the left floating float 6 are made of rubber, and the adjacent communicating holes 6c and 6d, that is, the communicating hole 6c at the upper end of the left floating float 6 and the communicating hole 6d at the lower end of the right floating float 6 are made of rubber. It is connected by a pipe 11 which is a flexible pipe. Air and water can be circulated between the buoyancy body chambers 6 b of the left and right floating and floating floats 6 through the pipe 11.

  A small fixed auxiliary float 12 is attached to the upper part of each of the left and right floating floats 6 using a pair of upper connecting pieces 6 a, and each auxiliary float 12 has a lateral center of the left and right floating floats 6. It is arranged on the communication hole 6c side at the upper end. The auxiliary float 12 contains foamed polystyrene as a buoyant body, and has a buoyancy that does not hinder the sinking of the left and right floating floats 6.

  By providing this auxiliary float 12, the left and right floating floats 6 that have been submerged in water are in a state in which the upper communicating hole 6c is located directly above when viewed from the side, in other words, the lower communicating hole 6d is located directly below. It becomes easy to hold the state. Further, the submerged left and right floating floats 6 are inclined obliquely with the upper communication hole 6c on the upper side and the lower communication hole 6d on the lower side, so that air and water in the buoyancy body chamber 6b are discharged. Can be done smoothly.

  Then, one end of a flexible air pipe 13 is connected to the communication hole 6 c at the upper end of the right floating and floating float 6. The other end of the air pipe 13 extends to the shore and is connected to an air pump 14 installed on the shore (see FIG. 1). The air pump 14 can switch between air supply and suction.

  Next, the operation of the net 1 will be described.

  FIG. 3 (a) shows a state in which the left and right floating floats 6 are filled with air in the buoyancy body chamber 6b and float on the water surface. When the air pump 14 is switched to the suction side and driven, the buoyancy body chamber 6b of the left and right floating floats 6 becomes negative pressure, and water flows into the buoyant body chamber 6b from the communication hole 6d at the lower end of the left floating float 6. The left floating float 6 loses buoyancy and sinks into the water (FIG. 3B).

  When sinking, water flows into the buoyancy body chamber 6b through the lower communicating hole 6d, so that the left floating float 6 sinks obliquely with the lower communicating hole 6d down. As a result, in the buoyancy body chamber 6b of the left floating / floating float 6 inclined obliquely, the communication hole 6c at the upper end is positioned at the uppermost position, so that air in the buoyancy body chamber 6b can be discharged without remaining. In addition, the auxiliary float 12 makes it easy to maintain the state in which the communication hole 6c at the upper end is located directly above, is not easily affected by waves or water flow, and the air is less likely to remain in the buoyancy body chamber 6b (FIG. 4 (a)). FIG. 4B shows an example in which the auxiliary float 12 is not provided. When the left floating float 6 is tilted due to strong waves, water flow, etc., the upper end communication hole 6c deviates from the position directly above, so that air remains at the upper end (shaded portion) in the buoyancy body chamber 6b. It becomes easy to do.

  When the buoyancy body chamber 6b of the left floatation float 6 is filled with water, the water flows into the buoyancy body chamber 6b of the right floatation float 6 through the pipe 11 (FIG. 3C). Then, as with the left floating / floating float 6, the right floating / floating float 6 sinks in an inclined state, so that air in the buoyancy body chamber 6b is discharged without remaining from the upper communicating hole 6c. In addition, since the auxiliary float 12 is also provided on the upper part of the right floating and floating float 6, it is easy to maintain the state in which the communication hole 6c at the upper end is located directly above, and air hardly remains in the buoyancy body chamber 6b.

  Thus, when the inside of the buoyant body 6b of the right floating float 6 is filled with water, the left and right floating floats 6 are completely submerged (FIGS. 3C and 3D), as shown in FIG. As described above, the work ship 15 can pass over the left and right floating floats 6. The floating float 6 and the fixed floating float 5 are color-coded, so that it is possible to easily confirm the location where the work ship can pass. Thereby, it is not necessary to separately provide a mark or the like, and it is possible to avoid a complicated structure.

  After the work ship 15 passes, the air pump 14 is switched to the feeding side to supply air to the left and right floating floats 6. Air in the air pump 14 is supplied to the buoyant body chamber 6b from the upper communicating hole 6c of the right floating sink 6 through the air pipe 13, and accordingly, water in the buoyant body chamber 6b passes through the flexible tube 11 from the lower communicating hole 6d. It is pushed out into the buoyancy body chamber 6b of the left floating float 6.

  Since the right floating float 6 flows into the buoyancy body chamber 6b through the communication hole 6c at the upper end, it floats in an inclined state with the communication hole 6c at the upper end facing upward. At this time, in the buoyancy body chamber 6b of the right floating levitation float 6 in an inclined state, the communication hole 6d at the lower end is positioned at the lowermost position (the state as shown in FIG. 3C). Water is discharged without remaining. In addition, since the auxiliary float 12 can easily maintain the state where the communication hole 6d at the lower end is located directly below, water hardly remains in the buoyancy body chamber 6b.

  When the buoyancy body chamber 6 b of the right floatation float 6 is filled with air, air is supplied to the buoyancy body chamber 6 b of the left floatation float 6 through the pipe 11. If it does so, the water of the buoyancy body chamber 6b will be discharged | emitted outside from the communicating hole 6d of a lower end, and the buoyancy of the left levitation float 6 will increase and it will surface. At this time, the left floating and floating float 6 floats in an inclined state with the communication hole 6c at the upper end facing upward as in the right floating and floating float 6, so that the lower floating float 6 has a lower end in the buoyancy body chamber 6b of the inclined right floating and floating float 6. The communication hole 6d is positioned at the lowermost position, and the water in the buoyancy body chamber 6b is discharged without remaining (as shown in FIG. 3B). Moreover, the auxiliary float 12 makes it easy to maintain the state in which the communication hole 6d at the lower end is located directly below, and the water in the buoyancy body chamber 6b hardly remains. When the inside of the buoyancy body chamber 6b of the left float / float floater 6 is filled with air, the left and right float float floats 6 are completely floated on the water surface, and the passage of the work boat is closed.

  The net 1 of the above embodiment has the floating floats 6 at two locations, but the floating floats 6 can be used at more locations, or can be provided symmetrically as shown in FIG. 6 has a shape in which left and right floating floats 6 in FIG. 2 are arranged symmetrically. Therefore, only the two left and right floats 6 'will be described in order to avoid duplication of explanation. For the sake of convenience, the left side in the figure is represented as the left floating float 6 ', and the right side is represented as the right floating float 6'. 2 that are the same as or equivalent to those in FIG. 2 are denoted by the same reference numerals, and description thereof is omitted to avoid duplication.

  An auxiliary float 12 'is attached to the upper part of each of the left and right floating floats 6'. Then, a communication hole 6c ′ at the upper end of the right floating and floating float 6 ′ and a communication hole 6d ′ at the lower end of the left floating and floating float 6 ′ are connected by a pipe 11 ′, and air is connected to the communication hole 6c ′ at the upper end of the left floating and floating float 6 ′. One end of the pipe 13 'is connected. Since the other end of the air pipe 13 'is connected to the air pipe 13 connected to the right floating float 6, the four floating floats (left and right floating float 6, left and right) are connected by one air pump 14. The right floating and floating floats 6 ') can suck and supply air at the same time. Thus, by dividing a plurality of floating and floating floats into two systems, it becomes possible to perform a rapid floating and sinking operation as compared with a case where a single system is provided.

  Next, the operation of the net 1 'is shown in FIG. Details are the same as those in FIG. FIG. 7A shows a state where the left and right floating floats 6 and the left and right floating floats 6 ′ are filled with air and float on the water surface. FIG. 7B shows a state where the air pump 14 is driven to suck air. When air is sucked, first, water flows in from the communication holes 6d and 6d 'at the lower ends of the left and right floating floats 6 and 6', and begins to sink. When the left floating float 6 and the right floating float 6 'are filled with water, water begins to flow into the right floating float 6 and the left floating float 6' through the pipes 11 and 11 '(FIG. 7C). When the inside of the right floating float 6 and the left floating float 6 'is filled with water, as shown in FIGS. 7D and 7E, all the floating floats are completely submerged in water.

  When floating, the air pump 14 is switched to the supply side and driven. Then, air is supplied through the air pipes 13 and 13 ', and the right and left floating floats 6 and 6' start to float. When the right floating float 6 and the left floating float 6 ′ are filled with air, the air is supplied to the left floating float 6 and the right floating float 6 ′ through the pipes 11, 11 ′ and starts to float. When the left and right floating floats 6 and the right floating and floating float 6 'are filled with air, all the floating and floating floats are completely floated on the water surface.

  Moreover, if the net fence concerning this invention arrange | positions the accumulation | aggregation fence in the downstream of an ups and downs float, the drifting object caught by the net field can be collected in one place. For example, in the case of the net 1 'in FIG. 6, as shown in FIG. 8 (a), both ends of the accumulation fence 15 are connected to the floating floats (the left and right floating floats 6 and the left and right floating floats 6'). Are connected to the network 1 ′. The accumulation fence 15 is a horizontally long net with a plurality of small fixed floats attached in the horizontal direction at a predetermined interval (not shown), and is installed on the water surface in a semicircular shape downstream of the net 1 '. Keep it. Then, when the floating float is submerged in water, the drifting substance (shaded portion) staying on the upstream side flows into the accumulation fence 15, so that the drifting substance can be collected and collected in one place (FIG. 8). (B)).

The front view which shows the outline | summary of the installation state of the drifting object capture fence embodiment concerning this invention. The elements on larger scale of the part in which the floating type main float in FIG. 1 is provided. FIGS. 3A to 3D are explanatory views showing a state in which a floating main float is submerged in water. FIG. 4A is a side view of the floating type main float. FIG. 4B is a side view of a floating main body without an auxiliary float. The top view which shows the state which the work ship has passed the drifting object capture fence which the main float of the ups and downs sank. The partial expanded front view which shows another embodiment of the flotation object trapping fence concerning this invention. Explanatory drawing which shows the state in which the floating type main float provided in the flotage capture fence of FIG. 6 sinks in water. Fig.8 (a) is a top view which shows the state which provided the fence for accumulation | aggregation | set in the drifting material capture fence concerning this invention. FIG.8 (b) is a top view which shows the state which accumulated the drifting material with the fence for accumulation.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Net place 5 Float 6 Float / float 6b Buoyant body chamber 6c Communication hole 6d Communication hole 7 Float part 8 Lower capture net 10 Chain (weight)
11 Piping

Claims (4)

In the net place where a plurality of floats are arranged at intervals in the horizontal direction and floated on the water surface, a weight is provided at the lower end and a catching net for capturing drifting objects is suspended,
At least two or more continuous floats are floated and suspended, and buoyant body chambers are provided inside these floated and floated floats. And arranged with the other positioned at the lower end, arranging the floating floats so that the positions of the adjacent communication holes are upside down, and connecting the adjacent communication holes with a pipe, Air is supplied and sucked through the connecting hole at the upper end of the floating float that is located at the end of the continuous floating float and the lower communicating hole is connected to the adjacent communicating hole by the pipe. A network characterized by that.   The mesh field according to claim 1, wherein a fixed auxiliary float is provided on an upper part of each floating float.   The net field according to claim 2, wherein the auxiliary float is provided on a side where the communication hole is arranged at an upper end from a lateral center of the float and sink float.   The float according to any one of claims 1 to 3, wherein the float of the float part is composed of the float and float and a fixed fixed float, and the float and float are color-coded. Aiba.

Images