JPH0452287Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a dredger, and particularly to a dredger that performs dredging work using a grab bucket.

[Prior Art] A dredger as shown in FIG. 9 is generally known as a dredger that uses a grab bucket as a dredging means.

This dredger uses a revolving crane type rope grab bucket for dredging. As shown in the figure, a base b is attached to the bow deck of a barge a, and a swing part d of a crane c is provided on the base b. A wire g is suspended from a pulley f provided at the tip of the boom e, and a grab bucket h is attached to the wire g.

There is also an example in which a construction machine, such as a backhoe, is used instead of the crane c. As shown in FIG. 10, a telescopic arm j is attached to the tip of a bucket hoe i, and a grab bucket h is provided at the lower end of this arm j.

[Problems to be solved by the invention] By the way, in the case of a dredger using a swinging crane, the area occupied by the swinging part d of the crane is large, and the turning radius of the swinging part d is also inevitably large.
Therefore, the overturning moment acting on the barge a becomes large, and the width and length of the barge a, that is, the barge a itself, becomes large in order to prevent the barge a from overturning. At the same time, manufacturing costs increase.

Furthermore, since the work is carried out by placing an earth and sand carrier (not shown) on the side of barge a, barge a has a large width, and a large space is required in the lateral direction relative to the forward direction of dredging work. I need. For this reason,
In narrow waterways such as rivers, dredging operations may be hindered, and other vessels may be unable to navigate during dredging operations. Furthermore, even when it is necessary to secure a waterway urgently, it is necessary to excavate a channel wider than necessary, which slows down the forward speed of dredging work. Furthermore, since the grab bucket h is only suspended by the rope g, there are problems such as the grab bucket h falling over or being insufficiently grasped due to irregularities on the bottom of the water, slopes, etc., resulting in a decrease in work efficiency.

In the case of a dredger using the backhoe i, the telescopic arm j is only mechanically extended and contracted by the operator, so the barge a may be damaged by waves, etc.
When the grab bucket is shaken, it may violently collide with the bottom of the water or rise suddenly when trying to grab dirt, etc. at the bottom of the water. For this reason, there was a problem that dredging work could not be carried out when barge a was shaking.

The present invention was developed in consideration of the above circumstances, and its purpose is to miniaturize the barge and place the earth and sand carrier at the stern of the barge to allow it to enter narrow rivers and other waterways and to be used for dredging in those waterways. work, and furthermore,
To provide a dredger that can increase the forward speed of dredging in emergencies and can efficiently dredge a wide area with one mooring.

[Means for Solving the Problems and Their Effects] In order to achieve the above object, the present invention includes a undulating arm provided on a barge so as to be able to rise and fall freely from this to the dredging work area, and a A dredging machine that is suspended so as to be tiltable left and right and extendable in the vertical direction, and when the arm is lowered, it extends into the dredging work area to excavate earth and sand, and when the arm is raised, it contracts and transports the dredged earth and sand onto a barge. a mobile hopper that is movably installed on the barge and receives the earth and sand from the dredging machine section; and a mobile hopper that is fixedly installed on the barge and receives the earth and sand at its earth and sand receiving position and at the rear of the stern part. comprising a guide means for guiding between earth and sand delivery positions to a carrier ship, and a hopper moving means for moving the hopper to an earth and sand receiving position and an earth and sand delivery position in synchronization with the raising and lowering of the hoisting arm, By reducing the overturning moment that acts on the barge during dredging work, the barge is made smaller, allowing it to work in narrow areas at a faster dredging speed and efficiently dredging a wide area with a single mooring. .

[Example] An example of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 to 3, on the deck of the barge 2 of the dredger 1, there is a luffing arm 3 that can be raised and lowered at its bow, and its base end is connected to a support stand 5 on the deck side with a pin 4. It is supported by a shaft. A gimbal 6 is pivotally supported at the tip of the arm 3 via a pin 7 so as to be tiltable in the longitudinal direction (longitudinal direction of the barge 2). The dredging machine part 8 is attached to this gimbal 6 by a pin 9 that can be tilted in the left and right direction (in the width direction of the barge 2).
is suspended through.

As shown in the enlarged views of main parts in FIGS. 4 and 5, this dredging machine section 8 has a guide frame 10 supported on a gimbal 6 by pins 9 so as to be tiltable in left and right directions. An elevating cylinder 12 is suspended within the guide frame 10 from its upper end by a pin 11. Further, near the lower end of a cylindrical telescopic arm 14 is fixed to the lower end of the rod 13 of the lifting cylinder 12. In this state, the elevating cylinder 12 is inserted into the telescopic arm 14,
As the cylinder 12 operates, the telescopic arm 14 surrounds the cylinder 12 and moves up and down. Inside the guide frames 15 and 16 located at the middle and lower ends of the guide frame 10, guide rollers are provided to guide the vertical movement of the telescoping arm 14 within the frame 10 and to support against external forces generated by excavation, etc. when the ship is rocking. 17 and 18 are provided. A plurality of these guide rollers 17 and 18 are provided so as to surround the telescoping arm 14 and equally support it from its outer periphery. At the lower end of the telescoping arm 14, a hydraulic grab bucket 19 is pivotally supported by a pin 20 so as to be tiltable in left and right directions, and an opening/closing cylinder 21 for opening and closing the grab bucket 19 is provided by connecting the pin 20 and bucket 19. .

At the tip of the hoisting arm 3, there is a hydraulic cylinder 22 for tilting back and forth, which tilts the guide frame 10 supported by the gimbal 6 back and forth. It is supported on a shaft. Further, a left-right tilting hydraulic cylinder 23 for tilting the guide frame 10 left and right is provided with one end being pivotally supported by the intermediate guide frame 15 and the other end being pivotally supported by the gimbal 6. Further, near the base end of the hoisting arm 3, a hoisting hydraulic cylinder 24 for raising and lowering the arm 3 is provided with one end being pivotally supported on the arm 3 and the other end being pivotally supported on the barge 2 side. Here, 25,2
6, 27, 28, 29, 30 are each hydraulic cylinder 2
These are support pins 2, 23, and 24. Further, 31 is a stopper that supports the turning limit of the undulating arm 3 when it is raised and prevents it from rolling backwards.

As a result of the above, the grab bucket 19 rises from the bottom floor S such as the bottom of the water due to the contraction of the telescopic arm 14,
It is configured to move onto the barge 2 by raising the erecting arm 3.

On the other hand, two rails 32a and 32b are provided on the deck of the barge 2, extending in the longitudinal direction of the barge 2 from the bow to the rear of the stern. Furthermore, the rails 32a, 32b have an upward slope toward the stern. These rails 32a, 32
On b, a hopper cart 34 carrying a mobile hopper 33 is mounted so as to be movable by wheels at its lower four corners. In addition, 35 is a rear support bracket of the hopper truck 34. Reference numeral 36 is a gate that, when opened, allows the earth and sand in the hopper 33 to be dropped downward.

Next, the hopper moving means will be explained. As shown in FIG. 6, there are a plurality of rope sheaves 37a, 37 on the upper side or on the barge 2 side near the middle part of the hoisting arm 3.
b are provided in parallel in the ship width direction. Furthermore, the same number of sheaves 38a and 38b are provided on the barge 2 side at the same positions as the sheaves 37a and 37b. In addition, these sheaves 37a, 37b, 38a,
38b are mounted symmetrically on both sides of the barge 2 and on both sides of the luffing arm 3. Further, inside the two rails 32a and 32b, there are two rope sheaves 39 with rotating shafts extending in the width direction of the ship near the support stand 5.
a and 39b are provided symmetrically. The sheave 3 is attached to the stern end of the rails 32a, 32b.
Similar to 9a and 39b, a rope sheave 40 has a rotating shaft in the ship width direction inside two rails 32a and 32b.
a and 40b are provided. Also, Hotsupa trolley 3
Two rope sheaves 41a and 41b having rotating shafts in the hanging direction are provided on both sides of the lower stern side of the vessel.

As mentioned above, one rope is stretched symmetrically on both sides of the sheaves arranged symmetrically on both sides of the barge 2, with one end on the barge 2 side and the other end on the hopper bogie 2 side.
It is fixed on the 4th side.

Specifically, the barge 2 side rope sheaves 38a, 3
One end 42e of the rope 42 is fixed to the barge 2 side near the outermost side of the rope 8b. Then, the rope sheaves 37a, 37b on the hoisting arm 3 side and the rope sheaves 38a, 38b on the barge 2 side are alternately stretched,
Two rails 32 from the innermost barge 2 side sheave
The sheaves 39a and 39b on the bow side of the ship a and 32b are spanned over. Furthermore, the bow side sheaves 40a, 40b
The sheave 41a of the hopper truck 34,
It is fixed to the eyepiece 43 via 41b. The hopper moving means is configured as described above.

In addition, the rope sheave 37a on the side of the hoisting arm 3,
The moving distance and the number of rope sheaves 37a and 37b (number of ropes) due to the up-and-down movement of the arm 3 of 37b are such that when the up-and-down arm 3 is up, the hopper cart 34 is located directly below the grab bucket 19, which is the soil receiving position, and when the up-and-down arm 3 is up and down. It is sometimes set to be located at the rearmost part of the stern as the earth and sand delivery position.

Further, on the deck of the barge 2, as shown in FIG.
a and 45b are attached. In addition, 46a, 46
b, 47a, 47b are anchors on the opposite shore or submarine anchors and mooring winches 44a, 44b, 45a, 45
This is a mooring rope that connects b. Further, on the deck, in the middle part, ship maneuvering winches 49a and 49b for pulling the earth and sand transport ship 48 are installed on both sides, ) Ship steering winches 50a and 50b are provided at the stern end of the ship for shifting the ship. Note that 51a, 51b, 52a, and 52b are ropes for ship maneuvering.

The above-mentioned undulation cylinder 24 and guide frame 10
A hydraulic adjustment mechanism (not shown) is provided between the guide frame 10 and a hydraulic cylinder 22 that tilts the arm 3 back and forth so that the guide frame 10 always remains vertical when the arm 3 is raised and lowered.

Next, we will discuss the effect.

When the main dredger arrives at its destination, for example barge 2
The mooring ropes 46a and 46b at the bow of the ship are moored to bollards on the opposite shore, and the mooring ropes 47a and 46b at the stern of the ship are moored to bollards on the opposite shore.
An anchor (not shown) connected to the tip of the mooring winches 44a, 44b, 45 is dropped onto the bottom floor S of the seabed etc. by a separate anchoring boat (not shown) or the like.
The barge 2 is moored by operating a and 45b. Then, as shown in FIGS. 7 and 8, the ropes 51a and 51b for maneuvering are connected to the earth and sand carrier 48 being towed by a tugboat (not shown) or the like. Next, the ship handling winches 49a and 49b are operated to bring the earth carrier 48 alongside the stern of the barge 2. At the same time, the ropes 52a and 52b for maneuvering the soil transport vessel 48 are attached to the earth transport vessel 48 in order to shift the soil transport vessel 48 in the width direction of the barge 2.
Intersect and connect. Incidentally, FIG. 8 shows a state in which the soil transport vessel 48 is shifted by operating the ship maneuvering winches 50a and 50b.

Next, dredging work will begin. First, when not working,
As shown by the imaginary lines in the figures and FIG. 4, the dredging machine section 8 fixed on the barge 2 is dropped into the dredging work area.

The hoisting cylinder 24 is contracted and the hoisting arm 3 is lowered into the dredging work area. At this time, guide frame 10
is always held vertically by the hydraulic adjustment mechanism. Next, the opening/closing cylinder 21 of the grab bucket 19 is contracted to open the grab bucket 19.
Then, extend the lifting cylinder 12 and extend the telescopic arm 1.
The grab bucket 19 at the lower end of No. 4 is dropped into the dredging work area of the bottom floor S. By extending the opening/closing cylinder 21 and closing the bucket 19 biting into the bottom floor S, earth and sand are grabbed and excavated.

Next, the lifting cylinder 12 is contracted and the bucket 1 is
Raise 9. Then, the hoisting cylinder 24 is extended, the hoisting arm 3 is erected, and the bucket 19 is moved onto the barge 2.

At this time, the barge 2 side sheaves 38a, 38b and the hoisting arm 3 side sheaves 37a, 37b approach each other, and the rope 42 bends. As a result, the hopper truck 34 on the inclined rail 32 moves toward the bow side. When the undulating arm 3 rises to the position of the stopper 31, the hopper cart 34 moves to a position directly below the grab bucket 19, which serves as the earth and sand receiving position. Then, the bucket 19 is opened and the earth and sand are dropped into the hopper 33.

In order to excavate again, the luffing cylinder 24 is retracted and the luffing arm 3 is lowered into the dredging work area. At this time, the pairs of sheaves 37a, 37b, 38a,
38b is separated, the rope 42 stretched over the rail 32 is pulled, and the hopper truck 34 loaded with earth and sand moves toward the stern side. When the undulating arm 3 collapses to its limit, the hopper truck 34 moves to the rearmost position and is located directly below the earth and sand transport ship 48, which serves as the earth and sand delivery position. Note that this hopper truck 34 is pulled toward the stern by the weight of the dredging machine section 8 and the hoisting arm 3, and no other power is required. Then, the gate 36 at the bottom of the hopper 33 is opened and the soil is dropped into the soil transport vessel 48.

At this time, the soil transport ship 48 is shifted in the width direction of the barge 2 by operating the ship steering winches 50a and 50b so that the earth and sand dropped onto the soil transport ship 48 is not biased.
Drop the earth and sand evenly.

The dredging machine section 8 is tilted forward, backward, left and right by the action of the hydraulic cylinders 22 and 23, as shown by imaginary lines in FIGS. 4 and 5, and a wide area can be dredged by one mooring of the barge 2.

[Effects of the invention] In summary, the present invention provides the following excellent effects.

(1) When the dredging machinery section is in the prone position, the hopper truck moves to the rearmost part of the stern of the barge, and when the dredging machinery section is in the upright position, the hopper truck moves to the position directly below the grab bucket at the bow section, so that the hopper truck moves to the rearmost part of the stern of the barge. The fluctuation of the center of gravity is small, which reduces the overturning moment of the barge, making it possible to downsize the barge and reduce costs.

(2) Since the barge can be made smaller and the soil carrier is placed alongside the stern of the barge to load the soil, it is possible to move forward with a narrow dredging width, making it easier to enter narrow waterways such as rivers. Dredging work can now be carried out in the waterway, and in the event of an emergency such as a river overflowing, dredging can be carried out quickly to prevent disasters, and it is also effective in rescue, reconstruction, etc.

(3) The weight of the dredging machine and the hoisting arm moves the hopper truck toward the stern, and the weight of the hopper truck itself moves it toward the bow, which saves labor and eliminates the need for a special power device. Energy saving can be achieved.

(4) Since the center of gravity of the barge does not shift and the barge does not oscillate, dredging work becomes easier and work efficiency can be improved.

[Brief explanation of the drawing]

Figure 1 is a side view of the dredger of the present invention, Figure 2 is a plan view of Figure 1, Figure 3 is a front view of Figure 1, and Figures 4 and 5 are enlarged views of the main parts of Figure 1. Figure 6 is a schematic perspective view showing the hopper moving means, Figures 7 and 8 are plan views showing the soil carrier moored on the barge, and Figures 9 and 10 are side views showing the conventional example. It is a diagram. In the figure, 2 is a barge, 3 is a hoisting arm, 8 is a dredging machine part, 32 is a rail, 34 is a hopper cart, 37,
38 is a rope sheave.

Claims (1)

[Scope of utility model registration request] A hoisting arm is installed on the barge so that it can be raised and lowered toward the dredging work area, and the tip of the arm is suspended from the tip of the arm so that it can be tilted forward, backward, left, and right, and extendable and retractable in the vertical direction. a dredging machine section that extends to excavate earth and sand and contracts when the arm is raised to carry the dredged earth and sand onto the barge; and a mobile type that is movably provided on the barge and receives earth and sand from the dredging machine section. a hopper, a guide means that is fixedly installed on the barge and guides the movable hopper between its earth and sand receiving position and the earth and sand delivery position to the earth and sand carrier located at the rear of the stern, and a guide means that is synchronous with the raising and lowering of the hoisting arm. and hopper moving means for moving the hopper to an earth and sand receiving position and an earth and sand delivery position.