JP2015190167A - Grab bucket for dredging - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grab bucket for dredging of a simple structure that may be manufactured at low costs and efficiently discharges excess water regardless of whether the scooped amount fills the bucket capacity or not.SOLUTION: A grab bucket for dredging has drainage holes 15, 16, each with a lid, along the upper edge of a scoop plate 2 of bucket shells 1,1, so that the water inside the bucket shell 1 is discharged from the drain holes 15, 16 when scooping water bottom sediment. Furthermore, lids 19, 20 that rotate around the position below the lower edge of the drainage holes are fitted on the drainage holes 15, 16 on the inner side of the bucket shell, along with an angle controlling member that retains the lids in an erected position from the inner surface of the bucket shells 1, 1 when the lids are open. When the sediment scooped into the bucket shells reaches the position of the lids, the lids rotate in the direction to close the drainage holes due to the pressure of the sediment.

Description

  The present invention relates to a grab bucket for dredging that is used in harbors and rivers and effectively drains water that is scooped up together with sediment at the bottom of the dredging, that is, waste water.

  Generally, when there is a lot of surplus water to be scooped together with the earth and sand at the time of dredging, the load of earth and sand on the ship is reduced. In addition, if surplus water is discharged from the ship in order to increase the load on the ship, the surrounding sea area will be polluted.

  For this reason, conventionally, a sealed grab bucket is used as a means to reduce scooping up of surplus water during grab bucket dredging, and the water inside the bucket is filled by filling the inside of the bucket with scooped bottom sediment. What drained and earthed is known (for example, patent documents 1).

  In addition, in a sealed grab bucket, it is known that the upper surface of the earth and sand scooped up by the lid for sealing is compressed in the bucket, draining excess water, and increasing the mud content. (Patent Document 2).

  In addition, a grab bucket for dredging having a drainage opening with an open / close lid that discharges water scooped into the bucket together with earth and sand has been developed (Patent Documents 3 and 4).

JP 2013-57186 A JP 2011-84372 A JP 2013-28927 A JP 2005-325602 A

  All of the above-mentioned conventional grab buckets for baskets are hermetically sealed, and the production cost increases to add a mechanism for attaching and opening the lid, and a high degree of sealing is required to obtain a high sealing rate. There was a problem of requiring production technology.

  Further, the conventional grab bucket with a drainage port disclosed in Patent Documents 2 and 3 has a drainage port opening / closing lid, a support shaft on the upper side, and when the bucket is opened, it is vertical by its own weight. When the bucket is closed by operating on the side that hangs down, it closes the drain by moving to the drainage side by its own weight. The drainage port is closed, and the subsequent discharge of the remaining water is not made from the drainage port with this open / close lid. There were problems such as the need to provide a drain outlet.

  In addition, if the purpose of dredging work is to remove contaminated soil, floating mud, etc., the minimum required amount of dredged soil is required to reduce the burden of disposal of sediment after dredging. If the upper surface of the soil that has been scooped out does not reach the drainage port, it may be necessary to scoop up a lot of excess water if the drainage port is provided only at the top as in the past. As a result, there is a problem in that the mud content of the earth is lowered.

  In view of such conventional problems, the present invention can be manufactured at a low cost with a simple structure and does not satisfy the capacity of the bucket as a means for increasing the mud content of the pumped soil, instead of the conventional sealed grab bucket. The purpose of this invention is to provide a grab bucket for dredging that can effectively drain residual water in any case of scooping from a small amount of scooping up to full bucket capacity.

  The feature of the grab bucket for scissors according to the first aspect of the present invention for solving the above-mentioned conventional problem is that the scooping plate portion formed in an arc shape and a pair of side plates integrated on both side portions of the scooping plate portion A pair of bucket shells, each of which is supported to be openable and closable, have a drainage opening with an open / close lid on the upper edge side of the scooping plate portion of the bucket shell, In the grab bucket for dredging so that the water in the bucket shell is discharged from the drain port, the bucket shell is inside the bucket shell of the drain port, and the position is below the lower edge of the drain port. The opening / closing lid is pivotably attached, and when the opening / closing lid is in an open state, the opening / closing lid is provided with an angle regulating member that is kept standing from the inner surface of the bucket shell, and is scooped into the bucket shells. Sediment is that the lid by pressure 該土 sand by reaching said lid position has to be rotated to the side to close the drain port.

  According to a second aspect of the present invention, in addition to the structure of the first aspect, the opening / closing lid is integrally provided with an extension portion whose front end is bent to the side opposite to the drain opening closing direction. is there.

  According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, a plurality of drain openings with the opening / closing lid are provided at different heights.

  According to a fourth aspect of the present invention, in addition to the structure according to any one of the first to third aspects, a vertical orientation that is raised on both sides of the opening / closing lid on the inner surfaces of the bucket shells on the left and right sides of the drainage port. Is provided with a partition wall.

  According to the present invention, the opening / closing lid is attached to the inside of the bucket shell of the drainage opening so as to be rotatable around a position below the lower edge of the drainage opening. When the lid is in an open state, an angle regulating member is provided for maintaining the state of rising from the inner surface of the bucket shell, and the earth and sand scooped up in the bucket shells reaches the open / close lid position, thereby causing pressure of the earth and sand. The opening / closing lid is pivoted to the side that closes the drainage port, so that the opening / closing lid always keeps rising from the inner surface of the bucket shell even when the bucket shell is closed. In order to receive the pressure of the earth and sand that moves along the inner surface when scooping up the earth and sand by the bucket shell at the back of the open / close lid What will be drain port is closed, sediment becomes the discharge of surplus water to reach the drain port is continued, effective Yomizu discharge is performed at sea.

  According to the present invention, as described in claim 2, the opening / closing lid is integrally provided with an extension portion whose front end is bent to the side opposite to the drain opening closing direction side, so that the earth and sand by the bucket shell is obtained. The soil that has reached the opening / closing lid position during scooping will be held, and the sediment pressure will act accurately in the closing direction of the opening / closing lid. Will be.

  As described in claim 3, the present invention is provided with a plurality of drainage openings with opening / closing lids at different heights, so that the upper surface of the scooped earth and sand reaches the lower side each time it reaches each drainage opening. Even if the earth and sand collected by thin layer dredging or finishing excavation is less than the capacity of the bucket, the excess drainage from the drainage outlet of the height corresponding to the top surface of Water will be discharged, and effective wastewater will be discharged according to the amount of scooping.

  According to the present invention, the bucket shell is scooped up by being provided with vertical partition walls raised on both sides of the opening / closing lid on the inner surfaces of the bucket shells on both the left and right sides of the drainage opening as described in claim 4. The earth and sand rising along the inner surface is restricted from moving in the bucket shell width direction by the partition wall, and when the drainage opening / closing lid is reached, the escape to the side of the opening / closing lid is restricted. In particular, even when the soft mud is scooped up, the earth and sand pressure acts on the open / close lid accurately.

It is a longitudinal cross-sectional view which shows the outline of one Example of the grab bucket for straws concerning this invention. It is the sectional view on the AA line in FIG. It is a partial expanded sectional view which shows the drain opening part of the grab bucket for straw shown in FIG. It is explanatory drawing which shows the operation | movement state of the grab bucket for dredging shown in FIG. 1, Comprising: (a) is the state which starts earth and sand scooping, (b) is the state which earth and sand reached the lower drainage in the middle of scooping (C) shows the scooping completion state. It is the elements on larger scale of the drain opening part in FIG.4 (b). It is a front view which shows the other example of this invention and shows the inner surface side of one bucket shell.

  Next, embodiments of the present invention will be described based on examples shown in the drawings.

  FIG. 1 shows an outline of a grab bucket for firewood according to the present invention. This bag grab bucket has a pair of bucket shells 1, 1. Each bucket shell 1 includes an arc-shaped scooping plate portion 2 that constitutes a bottom plate of the earth and sand gripping portion, and substantially fan-shaped side plates 3 and 3 integrated on both sides thereof.

  Each bucket shell 1 is supported so as to be rotatable about a support shaft 6 with respect to a lower frame 5 via brackets 4, 4 provided integrally on the upper edges of both side plates, and above the scooping plate portion 2. The lower ends of the suspension rods 7 and 7 are rotatably connected to both sides of the edge side rear surface, and the upper ends of the suspension rods 7 and 7 are rotatably connected to the upper frame 8.

  Although not shown in the drawings, the lower frame 5 and the upper frame 8 are provided with a sheep, and an open / close operation wire rope 9 is wound around each of the upper and lower frames 5 and 8, and the matching end side passes through the upper frame 8. It is extended upward and is wound up and unwound by a winch (not shown) for opening and closing the crane.

  The upper frame 8 is suspended by a wire rope 10 for suspension operation. The wire rope 10 for suspension operation is wound up by a winch (not shown) for suspension operation of the crane, and the upper frame 8 is moved up and down by rewinding operation. It is designed to move.

  With the upper frame 8 suspended by the suspension operation wire rope 10, the opening / closing operation wire rope 9 is operated to bring the lower frame 5 closer to the upper frame 8 to close the bucket shells 1, 1. The bucket shells 1 and 1 are closed by moving the lower frame 5 away from the upper frame 8.

  In the scooping plate portion 2 of each bucket shell 1, a pair of drainage ports 15, 16 are formed through the inside and outside of the bucket shell at the upper end side when the shell is closed at the center portion in the horizontal direction. ing.

  An opening / closing lid joining frame 17 is fixed to the inner peripheral edge of each drainage port 15, 16 in the bucket shell, and brackets 18, 18 for supporting the opening / closing lid project from the lower side of the frame. Between the brackets 18, 18, the lower end sides of the opening / closing lids 19, 20 that open and close the drain ports 15, 16 are inserted, and are attached so that the upper end side can be turned up and down by the support shaft 21.

  Angle regulating members 22 and 23 project from the inner surface of the scooping plate portion below the mounting positions of the open / close lids 19 and 20. The angle regulating members 22 and 23 regulate the opening angle of the opening and closing lids 19 and 20 to an angle that rises substantially perpendicular to the inner surface of the bucket shell when the opening and closing lids 19 and 20 are open. Yes, when the open / close lids 19 and 20 are opened, the rear side abuts against the angle regulating members 22 and 23 so that the opening side angle is regulated.

  A packing 24 is fixed to the lid joining surface of the opening / closing lid joining frame 17, and the drainage ports 15, 16 are formed by joining the flat lid body portions 19 a, 20 a of the opening / closing lids 19, 20 to the packing 24. Is closed in a watertight state.

  The open / close lids 19 and 20 are integrally provided at the front ends of the main body portions 19a and 20a with extensions 19b and 20b bent at the front end side opposite to the drain opening closing direction side. The extended portions 19b and 20b have a shape in which the distal end side of the main body portions 19a and 20a is bent downward in a square shape, and increases the operating force on the mouth closing direction side by the scooped clay described later. Have a role.

  On both sides of the drainage ports 15, 16, vertical partition walls 25, 25 are integrally provided so as to sandwich the opening / closing lids 19, 20. The interval W between the partition walls 25 and 25 is an interval between which the opening and closing lids 19 and 20 have a gap that allows the opening and closing lids 19 and 20 to be vertically rotated. The ends of the opening and closing lids 19 and 20, that is, the ends of the extension portions 19 b and 20 b It is formed in the width | variety which is located between the partition 25 and 25 and is rotated.

  The dredged grab bucket configured as described above is lowered to the bottom of the water with both bucket shells 1 and 1 being opened as shown in FIG. At this time, the open / close lids 19 and 20 of the drainage ports 15 and 16 hang down substantially vertically due to a moment due to their own weight. From this state, as shown in FIG. 4B, the lower frame 5 is moved to the upper frame 8 side to operate both bucket shells 1 and 1 in the closing direction.

  With the closing operation of both bucket shells 1, 1, the leading edge of the scooping plate portion 2 enters the water bottom soil, and the soil is scooped into the bucket shells 1, 1. At this time, the bucket shells 1 and 1 gradually change the angle and the scooping plate portion 2 moves from the downward state to the horizontal state. Along with this movement, the lower sides of the open / close lids 19 and 20 hit the angle regulating members 22 and 23, and follow the angle change of the scooping plate portion 2 in a state where the scooping plate portion 2 stands up while maintaining a certain relative angle.

  The earth and sand that has been scooped into the bucket shells 1 and 1 from the leading edge of the scooping plate part 2 slides on the scooping plate part 2 and the drainage ports 15 and 16 are opened until reaching the lower opening / closing lid 19 position. The water above the earth and sand 30 in the bucket shells 1 and 1 flows out from the drainage ports 15 and 16.

  When the earth and sand 30 reaches the opening / closing lid 19 of the drain port 15 on the lower side, the earth and sand 30 pushes the lower surface of the earth and sand 30 to rotate the opening / closing lid 19 to the closing side. At this time, the earth and sand 30 rising along the inner surface of the scooping plate portion 2 rises by the movement of the scooping plate portion 2 in the direction of the both sides due to the presence of the partition walls 25 and 25. Even if it is soft earth and sand, the pushing force against the lower surface of the opening / closing lid 19 is transmitted without escaping to the left and right, and the opening / closing lid 19 is reliably rotated in the closing direction.

  Further, since the extension 19b at the tip of the opening / closing lid 19 is bent downward, the opening / closing lid 19 is in a state of holding the rising earth and sand, and even if it is soft earth and sand, the opening and closing is caused by the rising. The rotational moment in the closing direction of the lid 19 is increased, and the operation in the closing direction is appropriately performed.

  When the earth and sand 30 further rises after the lower drainage opening 15 is closed, the water on the earth and sand 30 is discharged from the upper drainage opening 16 as described above, and the earth and sand opens and closes the drainage opening 16. When the lid 20 is reached, the opening / closing lid 20 rotates to the drain opening closing side and closes the drain opening 16 in the same manner as the lower opening / closing lid 19 described above.

  In the above-described example, the case where the two drainage ports 15 and 16 are provided in each bucket shell 1 and 1 in a vertical row is shown, but in addition to this, two or more in the vertical direction are not shown. In addition, as shown in FIG. 6, it may be provided in a plurality of rows of two or more rows in the vertical direction. Also in these cases, the arrangement of the partition walls and the shape of the opening / closing lid are the same as described above.

  In the above-described example, the angle regulating members 22 and 23 of the opening and closing lids 19 and 20 are installed on the scooping plate portion 2 as separate bodies from the respective opening and closing lids. You may make it regulate a rotation angle by contact | abutting on the surface of the part 2. FIG.

DESCRIPTION OF SYMBOLS 1 Bucket shell 2 Scooping plate part 3 Side plate 4 Bracket 5 Lower frame 6 Support shaft 7 Hanging rod 8 Upper frame 9 Opening and closing operation wire rope 10 Hanging operation wire ropes 15 and 16 Drain opening 17 Opening and closing lid joint frame 18 Opening and closing lid support Brackets 19 and 20 Opening and closing lids 19a and 20a Main body portions 19b and 20b Extension portions 21 Support shafts 22 and 23 Angle restricting member 24 Packing 25 Bulkhead 30 Earth and sand

Claims (4)

A pair of bucket shells composed of an arcuate scooping plate portion and a pair of side plates integrated on both sides of the scooping plate portion are supported so as to be openable and closable, and the scooping plate of the bucket shell is In the grab bucket for dredging, which has a drain opening with an open / close lid on the upper edge side of the part, and water in the bucket shell is drained from the drain opening when scooping the bottom sediment.
The open / close lid is attached to the inside of the drain shell of the water drain opening so as to be rotatable around a position below the lower edge of the water drain opening, and the inner surface of the bucket shell is opened when the open / close lid is open. It is equipped with an angle regulating member that keeps it standing up from
The earth and sand picked up in the bucket shells reaches the opening / closing lid position, and the opening / closing lid is rotated to the side of closing the drainage port by the pressure of the earth and sand. Grab bucket.   The grab bucket for a bag according to claim 1, wherein the opening / closing lid is integrally provided with an extension portion whose front end is bent to the side opposite to the drain opening closing direction.   The dredging grab bucket according to claim 1, wherein the drainage opening with the opening / closing lid is provided with a plurality of drainage openings at different heights. The bag grab bucket according to any one of claims 1 to 3, further comprising vertical partition walls raised on both side portions of the opening / closing lid on inner surfaces of the bucket shells on both the left and right sides of the drain port.

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