JP2008231687A - Bucket for sludge dredge and dredger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bucket for sludge dredge economically attainable by modifying merely the structure of a backhoe bucket and having good operability and high sludge sucking efficiency and a dredger using the bucket. <P>SOLUTION: The approximately half of the area of the opening part of the backhoe bucket 1 on the side mounted on an arm is covered by a fixed cover 24. A movable cover 26 is so installed on the backhoe bucket 1 along the guide parts 35 formed at the left and right edges of the opening part as to be slid by a hydraulic cylinder 27. The movable cover 26 can cover an extra opening part 25 by moving from the state in which it covers the fixed cover 24 when the hydraulic cylinder 27 is extended. A water discharge window 41 for discharging water during the excavating is formed in the fixed cover 24. A small cover 43 opening outward is installed to close and open the water discharge window 41. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a sludge dredge bucket used when dredging sludge accumulated on a water bottom such as the seabed, riverbed or lake bottom, and a dredger equipped with the bucket.

  Conventionally, as a sludge bucket used for dredging work, there is one using a clamshell bucket. This is a crane-type dredger mounted on a trolley, and the sludge is excavated by lowering the clamshell bucket suspended from the boom via a wire rope to the bottom of the water and closing the shell from the open state. It is taken into the bucket, and then the bucket is pulled up to turn the dredger, the shell is opened, and the sludge in the shell is discharged to a predetermined place.

However, since this crane-type dredger is expensive, a hydraulic excavator-type dredger that can be provided at a relatively low cost is also awarded. As an example, for example, Patent Document 1 discloses that a back cover that can be pivotally attached to the tip of an arm is attached to the back of the arm (the cab side surface) with a fixed lid that closes the opening of the backhoe bucket, There is a type in which a movable lid is attached to the tip so as to be rotatable, and this movable lid is pivotally opened and closed with respect to the backhoe bucket by a hydraulic cylinder attached to the back surface of the arm. The bucket of this Patent Document 1 excavates sludge at the bottom of the water by turning the arm or backhoe bucket, and then closes the backhoe bucket containing sludge by applying the opening of the backhoe bucket to the fixed lid. It is a structure that prevents the sludge from leaking from the backhoe bucket by closing the opening of the backhoe bucket by rotating the lid with a hydraulic cylinder.
JP 2005-330793 A

  However, the conventional sludge bucket using the backhoe bucket has a structure in which a fixed lid or a movable lid and a hydraulic cylinder are attached to the arm. In many cases, there is a problem that manufacturing takes time and cost.

  In addition, when dredging is performed, the dredging area is usually divided into curtains to prevent the sludge from diffusing into other water areas. There is a risk of colliding with the pollution prevention frame and damaging the fixed lid, the movable lid, or the hydraulic cylinder for rotating the movable lid or damaging the pollution prevention frame. In addition, there is a problem that the work cannot be performed with the arm close to the vicinity of the pollution prevention frame due to the presence of such a lid.

  In addition, if the opening of the backhoe bucket is faced upward and the opening is not leveled, sludge placed in the bucket may leak during the process of raising the bucket, turning, and discharging the soil. It is necessary to adjust the angle of the backhoe bucket at the same time, and it is necessary to always close the opening of the backhoe bucket with a fixed lid or movable lid. There is a problem that the sludge in the bucket easily leaks because it is difficult to maintain.

  Further, in the configuration in which the movable lid is rotated by the hydraulic cylinder, when the movable lid is rotated to the bucket opening side after the excavation operation and the opening is closed by the movable lid, with the rotation of the movable lid, There is a problem in that the water that is pushed by the movable lid and enters the bucket swallows the sludge in the bucket, the sludge in the bucket diffuses, and the efficiency of taking in the sludge deteriorates.

  In view of the problems of the prior art, the present invention can be economically realized only by modifying the structure of only the backhoe bucket, has good operability, and has good sludge intake efficiency, and a bag using the bucket. The purpose is to provide a machine.

In order to solve the above-described problem, the sludge bucket of claim 1 includes a fixed lid that covers an approximately half region on the attachment side to the arm of the opening portion of the backhoe bucket;
Guide portions provided on the left and right edges of the opening portion of the backhoe bucket,
Both ends are slidable along the left and right guide portions, and it is possible to cover the extra opening that is not covered by the fixed lid by moving the backhoe bucket from the state covering the fixed lid to the excavation claw side. A movable lid,
A hydraulic cylinder for moving the movable lid from the fixed lid between the extra openings;
A water discharge window provided on the fixed lid for discharging water during excavation;
It is characterized by comprising a small lid having an outer opening structure for closing and opening the water discharge window.

The sludge bucket according to claim 2 is the sludge bucket according to claim 1,
The hydraulic cylinder has a structure covered with at least a protective part provided on the movable lid.

The sludge bucket according to claim 3 is the sludge bucket according to claim 1 or 2,
The small lid is attached to the fixed lid with the pivot side as the excavation claw side and the free end as the attachment side to the arm of the backhoe bucket,
The small lid may be covered with the movable lid in a state where the movable lid is pulled to open the extra opening.

The sludge bucket for claim 4 is a sludge bucket according to any one of claims 1 to 3,
A closing plate for closing a gap between the fixed lid and the movable lid is provided on the excavation claw side of the fixed lid.

  According to a fifth aspect of the present invention, a dredge machine has the sludge bucket according to any one of the first to fourth aspects.

  According to the first aspect of the present invention, the opening portion of the backhoe bucket is provided with the fixed lid that covers approximately half of the rear side of the opening portion (the attachment side to the arm of the bucket), and is not covered by the fixed lid. A movable lid is slidable in the front-rear direction by a hydraulic cylinder so that the extra opening can be opened and closed, and a water discharge window and an outer opening-type small lid that opens and closes this window are provided on the fixed lid. Therefore, when the bucket is rotated with the movable lid pulled to the rear side and the extra opening is opened, and the sludge is taken into the bucket from the extra opening, the water pressure in the bucket rises and the small lid moves outward. Open and sludge is efficiently taken into the bucket. In addition, since the movable lid is opened and closed by sliding, the sludge caused by the sludge of the sludge when closing the movable lid, such as a conventional movable lid that opens and closes by matching the movable lid to the opening of the bucket, There is no leak from inside the bucket. For this reason, according to the bucket of claim 1, the efficiency of taking sludge into the bucket during excavation is improved.

  In addition, when a fixed lid or a movable lid is attached to the arm, it is difficult to lift the bucket so that the opening of the bucket is horizontal due to the vertical movement of the arm. Because it is attached, the opening of the bucket can be leveled regardless of the posture of the arm, the operation for leveling the bucket is easy, and the operability is good, so it is taken into the bucket The sludge is less likely to leak and work efficiency is improved.

  Further, since the arm is not provided with a fixed lid, a movable lid, and a hydraulic cylinder for rotating the movable lid, the bucket of the present invention does not require modification of the arm, and can be provided at low cost only by modification of the bucket.

  Further, since the bucket according to claim 1 does not require a fixed lid or a movable lid attached to the arm and a hydraulic cylinder for rotating the bucket, the fixed lid, the movable lid attached to the arm, or the like as a conventional machine using a bucket. The possibility that the hydraulic cylinder collides with the pollution prevention frame in the water and is damaged or the possibility of damaging the pollution prevention frame is reduced, and the excavation work can be performed to the position where the arm is close to the pollution prevention frame. The range can be expanded.

  According to the invention of claim 2, in addition to the invention of claim 1, since the hydraulic cylinder that opens and closes the movable lid is covered by the protection portion, the cylinder can be protected from sludge, sand, and the like.

  According to a third aspect of the present invention, in the bucket with a lid for a bottle according to the first or second aspect, the small lid for opening and closing the water discharge window is a movable lid in a state in which the movable lid is pulled to open the extra opening. Because the water pressure on the front side of the opening that rises as the bucket and arm turn during sludge excavation is blocked by the movable lid and does not act on the small lid, As the water pressure in the bucket increases, the small lid easily opens and water is smoothly discharged from the water discharge window. For this reason, during excavation, sludge enters smoothly into the bucket from the extra opening, and the take-up efficiency is further improved.

  According to the fourth aspect of the present invention, since the closing plate for closing the gap between the fixed lid and the movable lid is provided on the excavation claw side of the fixed lid, that is, the front portion, sludge and water are movable with the fixed lid during excavation. It is prevented from flowing through the gap between the lid and the take-in efficiency is improved. Also, when closing the extra opening with the movable lid and pulling it up, this closing plate closes the gap between the movable lid and the fixed lid, so that the sludge in the bucket creates a gap between the movable lid and the fixed lid. This prevents leakage to the outside and improves work efficiency.

  According to the invention of claim 5, it is possible to provide a dredger capable of obtaining the effects of claims 1 to 4.

  FIG. 1 is a side view showing an example of a dredger 2 equipped with a sludge bucket 1 according to an embodiment of the present invention. In this embodiment, a case where the dredger 2 is installed on the carriage 3 to constitute the dredger is shown. Reference numeral 4 denotes a turning body installed via a turning device 5 on the carriage 3. A driver's cab 6 and a power unit 7 are disposed on the revolving structure 4. Reference numeral 8 denotes a work front attached to the swing body 4. The work front 8 is pivoted to the swing body 4 by a boom cylinder 9 so that it can be raised and lowered, and is pivoted to the tip of the boom 10 by an arm cylinder 11. An arm 12, which is attached to the arm 12, a bucket cylinder 13 attached to the arm 12 for rotating the bucket 1 attached to the tip of the arm 12, and between the bucket cylinder 13 and the arm 12 and the bucket 1. It comprises an arm link 14 and a bucket link 15 for expanding the attached rotation angle. Reference numeral 16 denotes the bottom of the sea, such as the seabed, riverbed, or lake.

  In this embodiment, a configuration in which the turning body 4 is directly installed on the carriage 3 via the turning device 5 is shown. However, on the carriage 3 including the traveling body on which the turning device 5 is installed. It may be mounted on. In some cases, the left and right side frames of the traveling body are removed and the center frame is fixed on the carriage 3 to form a dredger. Also, in order to increase the reach depth of the sludge bucket 1, a recess is provided on the deck of the carriage 3, and the traveling body, the center frame, or the turning device 5 in this embodiment is installed in the recess. is there.

  2 is a plan view showing the sludge bucket 1, FIG. 3 is a sectional view taken along line EE, FIG. 4 is a sectional view taken along line FF in FIG. 3, FIG. 5 is a partially enlarged view of FIG. These drawings are partially enlarged views, and these drawings are shown during excavation, that is, with the movable lid opened. As shown in the figure, the sludge bucket 1 is configured based on a backhoe bucket. Reference numeral 17 denotes a bracket attached to the back surface of the bucket 1 on the opposite side (rear part) of the excavation claw 19 (this excavation claw side is the front). The bracket 17 has a pin 20 for connecting the bucket 1 to the arm 12. A pin hole 21 for inserting (see FIG. 1) and a pin hole 23 for inserting a pin 22 (see FIG. 1) for connecting the bucket link 15 are provided.

  Reference numeral 24 denotes a fixed lid that is fixed by welding or the like so as to cover approximately half of the rear side of the opening of the bucket 1, 25 is a surplus opening that is not covered by the fixed lid 24, and 26 is this surplus opening. A movable lid for opening and closing 25 and a hydraulic cylinder 27 for opening and closing the movable lid 26 are provided. Reference numeral 28 denotes a reinforcing frame provided on the left and right side plates 1a and 1a of the bucket 1, and supports the fixed lid 24 and the movable lid 26 to prevent these deformations.

  The movable lid 26 includes a main plate 29 and left and right sub-plates 30 as shown in FIGS. The main plate 29 includes a flat plate portion 29a, vertical plate portions 29b on both sides thereof, and a vertical plate portion 29c on the front end. The sub-plate 30 includes a flat plate portion 30a, a vertical plate portion 30b at the inner end thereof, a vertical plate portion 30c erected at an intermediate portion of the flat plate portion 30a, and a reinforcing plate welded to a corner portion of the vertical plate portion 30c and the flat plate portion 30a. Part 30d. The main plate 29 and the sub plate 30 are coupled by fastening the left and right vertical plate portions 29 b of the main plate 29 and the vertical plate portion 30 c of the sub plate 30 using bolts 31 and nuts 32. In this coupled state, a rectangular cylinder protection portion 33 for accommodating the hydraulic cylinder 27 is formed on both sides of the main plate 29. In addition, a gap 34 is formed between the fixed lid 24 and the flat plate portion 29 a of the main plate 29 so that the small lid 43 described later can be opened and closed.

  At the left and right edges of the opening of the bucket 1, a guide member 35 a attached to the upper surface of the fixed lid 24 and a guide member 35 b provided on the upper portion thereof constitute a guide portion 35 of the movable lid 26. And the edge part of the flat plate part 30a of the sub-plate 30 of the said movable cover 26 is engage | inserted between these guide members 35a and 35b so that sliding is possible in the front-back direction. Reference numeral 36 denotes a support member for supporting the movable lid fixed to the upper surface of the fixed lid 24.

  As shown in FIG. 2, the left and right hydraulic cylinders 27 that open and close the movable lid 26 are connected at their heads to a bracket 37 provided at the rear of the opening of the bucket by a pin 38, and the piston rod is connected to the movable lid 26. The sub-plate 30 is attached to a bracket 39 provided on the front end portion of the sub-plate 30 by a pin 40.

  Reference numeral 41 denotes a water discharge window provided on the fixed lid 24. The water discharge window 41 is formed in a region close to the width of the gap 34 in the formation portion of the gap 34 of the movable lid 26 toward the rear side of the fixed lid 24. The water discharge window 41 is closed and opened by a small lid 43 attached to the front edge portion of the front edge portion so as to be pivotable by a pivoting portion 42 so that the opening portion of the bucket 1 faces upward or obliquely. In the upward state, the small lid 43 closes the water discharge window 41 by its own weight and opens due to an increase in the water pressure in the bucket 1 during excavation. As shown in FIG. 2, the movable lid 26 is pulled backward by the contraction of the hydraulic cylinder 27 and the surplus opening 25 is opened, that is, the small lid 43 is covered with the movable lid 26 during excavation.

  2, 3, and 6, the reference numeral 44 is provided on the upper surface of the front portion of the fixed lid 24 by being fixed by a fixing tool such as a bolt 45 and a nut 46 or by welding, and between the fixed lid 24 and the movable lid 26. It is a closing plate that closes the gap 34.

  When excavating the bottom 16 using this dredger, as shown in FIG. 7, the hydraulic cylinder 27 is contracted and the extra opening 25 is opened, and the bucket 1 is moved to the arrow by the bucket cylinder 13. The excavation is performed while rotating as indicated by R and pulling the arm 12 toward the front side (the cab 6 side) by the arm cylinder 11.

  During the excavation, the sludge entering the bucket 1 as shown by the arrow A from the extra opening 25 raises the water pressure in the bucket 1, thereby opening the small lid 43 by the water pressure and discharging the water in the bucket 1 to discharge water. The bucket 1 is pushed out as shown by the arrow B, and the bucket 1 is filled with sludge. At the time of excavation, since the small lid 43 is covered by the movable lid 26, water pressure acting on the opening side surface of the bucket 1 as the bucket 1 rotates is received by the movable lid 26. Does not act, the small lid 43 is smoothly opened, the water in the bucket 1 is discharged from the water discharge window 41 to the arm 12 side, and sludge enters the bucket 1 smoothly.

  In addition, since the movable lid 26 is structured to be opened and closed by sliding, there is no tilt to the sludge in the bucket when the movable lid is closed, unlike a movable lid attached to a conventional arm. For this reason, according to the bucket 1 of this embodiment, the efficiency of taking sludge into the bucket during excavation is improved.

  During excavation by the bucket 1, the gap 34 between the fixed lid 24 and the movable lid 26 is closed by the vertical plate portion 29 c of the main plate 29 of the movable lid 26 and the closing plate 44 provided on the fixed lid 24. For this reason, the pressurizing action of the water pressure on the small lid 43 through the gap 34 is prevented, and sludge is prevented from being discharged to the outside by bypassing the gap 34, which contributes to improvement in the intake efficiency.

  After the excavation operation is finished, as shown in FIGS. 8 and 9, the boom 10, the arm 12, the hydraulic cylinder 27 is extended to close the surplus opening 25, and the opening of the bucket 1 is leveled. The bucket 1 is pulled up, and the working front 8 is swung by the operation of the swiveling device 5 and discharged to a predetermined place. Here, in the process of pulling up the bucket 1 of this embodiment, the bucket 1 is in a state in which the movable lid 26 closes the remaining opening 25 by operating the bucket cylinder 13 regardless of the posture of the boom 10 or the arm 12. In addition, the bucket 1 can be lifted while keeping the opening thereof horizontal, and sludge taken into the bucket is less likely to leak, thereby improving work efficiency. Further, the closing plate 44 prevents sludge from flowing out from the side of the surplus opening 25 to the gap 34 in a state where the surplus opening 25 is closed by the movable lid 26, and contributes to improvement of work efficiency. In addition, by preventing the sludge taken in the bucket 1 from leaking and flowing out, environmental pollution of the surroundings can be prevented.

  Further, when a fixed lid or a movable lid is attached to the arm 12 as in the prior art, it is difficult to lift the bucket opening so that the opening of the bucket becomes horizontal due to the vertical movement of the arm 12, but in this embodiment, Since the fixed lid 24 and the movable lid 26 are attached to the bucket 1, the operation becomes easy.

  Further, since the arm 12 is not provided with a fixed lid, a movable lid, and a hydraulic cylinder for rotating the movable lid, the bucket according to the present invention does not require modification of the arm, and can be provided at a low cost only by modification of the bucket 1. .

  Further, since the bucket 1 of this embodiment does not require a fixed lid, a movable lid or a movable cylinder for rotating the movable lid attached to these arms, a fixed lid attached to the arm like a conventional machine using a bucket, The movable lid or hydraulic cylinder collides with an underwater pollution prevention frame (not shown) or the like, and the possibility of damaging the pollution prevention frame is reduced, and the arm 12 is excavated to a position close to the pollution prevention frame. The work can be performed, the excavation work range can be expanded, and the operation becomes easy.

  In this embodiment, since the hydraulic cylinder 27 for sliding the movable lid 26 is covered with the movable lid 26, the hydraulic cylinder 27 can be protected from sludge, sand, or water obstacles. Note that this protective part may be provided not only on the movable lid 26 but also on the fixed lid 24 side so that the tube portion of the hydraulic cylinder 27 is covered even when the hydraulic cylinder 27 is extended.

It is a side view which shows an example of the dredge provided with the bucket for sludge baskets of one embodiment of this invention. It is a top view which shows the bucket of this Embodiment in the state which opened the extra opening part by the movable cover. It is EE sectional drawing of FIG. It is FF sectional drawing of FIG. It is the elements on larger scale of FIG. FIG. 4 is a partially enlarged view of FIG. 3. It is sectional drawing explaining the effect | action of the bucket of this Embodiment. It is a top view which shows the bucket of this Embodiment in the state which closed the extra opening part with the movable lid. It is GG sectional drawing of FIG.

Explanation of symbols

1: Sludge bucket, 2: dredger, 3: truck, 4: turning body, 5: turning device, 6: cab, 7: power unit, 8: work front, 9: boom cylinder, 10: boom , 11: arm cylinder, 12: arm, 13: bucket cylinder, 14: arm link, 15: bucket link, 16: water bottom, 17: bracket, 19: excavation claw, 20, 22: pin, 21, 23: pin hole 24: fixed lid, 25: extra opening, 26: movable lid, 27: hydraulic cylinder, 28: reinforcing frame, 29: main plate, 30: sub-plate, 31: bolt, 32: nut, 33: protection unit, 34 : Gap, 35: Guide part, 36: Support member, 37: Bracket, 38: Pin, 39: Bracket, 40: Pin, 41: Water discharge window, 42: Pivoting part, 43: Small lid, 44: Blocking Board, 45: Bolt, 4 : Nut

Claims (5)

A fixed lid that covers about half of the area on the attachment side to the arm of the opening of the backhoe bucket;
Guide portions provided on the left and right edges of the opening portion of the backhoe bucket,
Both ends are slidable along the left and right guide parts, and the remaining opening that is not covered by the fixed lid is covered by the movement of the backhoe bucket from the state of covering the fixed lid to the excavation claw side. A movable lid,
A hydraulic cylinder for moving the movable lid from the fixed lid between the extra openings;
A water discharge window provided on the fixed lid for discharging water during excavation;
A sludge bucket, comprising a small lid having an outer opening structure for closing and opening the water discharge window. In the sludge bucket according to claim 1,
A sludge bucket, wherein the hydraulic cylinder has a structure covered with at least a protective part provided on the movable lid. In the sludge bucket according to claim 1 or 2,
The small lid is attached to the fixed lid with the pivot side as the excavation claw side and the free end as the attachment side to the arm of the backhoe bucket,
The small lid has a structure in which the small lid is covered with the movable lid when the movable lid is pulled to open the extra opening. In the sludge bucket for any one of claims 1 to 3,
A sledding bucket, wherein a closing plate for closing a gap between the fixed lid and the movable lid is provided on the excavation claw side of the fixed lid.   A dredge having the sludge bucket according to any one of claims 1 to 4.

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