JP2581964B2 - Grab ship moving equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Object of the Invention (1) Field of the Invention The present invention relates to a grab ship by driving a spat from the grab ship to the bottom of the water and winding the wire attached to the spat with a winch. The present invention relates to a grab ship moving device for moving a ship.

(2) Prior Art The conventional movement of the glove ship was performed by anchoring the ship on both the bow and stern positions on the left and right sides, and operating a wire or chain connecting the anchor to the hull. However, such a conventional mobile device occupies a wide sea area by wires or the like connecting an anchor, which hinders navigation of a ship passing nearby and takes time for anchoring work. Had an adverse effect.

For the above-mentioned reason, the grab ship is provided with a moving spat loosely fitted in a longitudinal hole formed in a substantially central portion of a hull of a hull and a fixing spat loosely fitted in a hole formed in a hole of the hull. A moving device for a grab ship has been proposed (see Japanese Patent Publication No. 49-20430).

According to this moving device, when the moving spat is driven into the water bottom and the other end of the wire having one end attached to the lower part of the moving spat is wound by a winch via the end of the hull, Can be moved while being guided by the moving spat through the long hole. After the hull is moved, both the moving spat and the fixing spat are driven into the bottom of the water to fix the hull, and a dredging operation using a grab is performed.

(3) Problems to be Solved by the Invention However, when the hull is shaken by wind waves when the grab boat equipped with the above-mentioned moving device is driven with the moving spat being driven into the water bottom, the moving spat fixed to the water bottom. And the long hole of the hull rubbed violently, and there was a fear that abrasion and distortion might occur in the sliding contact part.

The present invention has been made in view of the above-described circumstances, and it is possible to prevent damage to a sliding contact portion between a moving spat and a long hole of a hull, which is caused by shaking of the hull, and furthermore, the operation is smooth. It is an object of the present invention to provide a moving device for a grab ship that is easy to handle.

B. Configuration of the Invention (1) Means for Solving the Problems In order to achieve the above object, according to the invention of each claim, it is loosely fitted into a longitudinally extending elongated hole formed in a substantially central portion of a hull. Moving spat, a fixed spat loosely fitted to a portion provided at the rear of the hull, a crane that can rotate around a vertical axis with respect to the hull, and a grab suspended from this crane, In a moving device for a grab ship, comprising: a lifting device for raising and lowering each spat up and down to the bottom of the water; and a traction device for moving the spat in one direction along the long hole, the moving spat is slidable up and down. A buffer sleeve to be inserted into the elongated hole is fitted into the elongated hole. The buffer sleeve is vertically extended in the elongated hole, and both inner side surfaces of the elongated hole are connected to upper and lower ends of the sleeve body, respectively. Into it And a pair of upper and lower flanges having a diameter larger than that of the sleeve main body, which are slidably slidably back and forth. Further, on both sides of the upper end of the cushioning sleeve, guides provided along both sides of the long hole on the upper surface of the hull. Rollers capable of rolling on the rails are provided, and the upper surface of the guide rail is inclined upward in the direction of pulling the pulling device with respect to the moving spat. According to the invention of claim 2 in particular, the wire of the elevating device for raising and lowering the moving spat suspends the upper end of the moving spat via a pulley disposed above the moving spat, The pulley is arranged such that the wire between the pulley and the moving spat is inclined with respect to a vertical line, and the horizontal component of the tension of the wire on the moving spat is opposite to the pulling direction. .

(2) Action When the moving spat driven into the water bottom is slid along the long hole of the hull by the towing device, the hull moves by the reaction. At this time, even if the hull oscillates with respect to the moving spat due to the wind wave, the elongated hole and the moving spat do not directly rub against each other due to the buffer sleeve, thereby preventing abrasion or distortion from occurring in the sliding contact portion. .

Further, in particular, according to the above-described configuration of the cushioning sleeve, while the self-weight of the sleeve is naturally supported on the hull via the rollers and the guide rails, the side pressure acting on the long hole from the sleeve causes the upper and lower flange portions and the long hole to be in contact. It is stably and firmly supported on the hull side through each sliding contact portion with both side surfaces (that is, while securing a long vertical support span). Moreover, since the guide rails are inclined upward in the direction of towing of the towing device with respect to the moving spat, when the moving spat is pulled up from the water bottom after the hull using the towing device has been moved, the rollers are pulled out. The shock-absorbing sleeve supported by the guide rail is lowered by its own weight along the inclined surface of the rail, and the sleeve can be automatically returned to the original position.

Furthermore, according to the above configuration of the invention of claim 2, when the roller is at the top of the guide rail, the horizontal component of the tension exerted on the spat by the wire suspending the moving spat is:
Since the direction opposite to the spat pulling direction of the pulling device is used, the tension can be used to assist the automatic return of the cushioning sleeve.

(3) Example Hereinafter, an example of the present invention will be described with reference to the drawings. As shown in FIG. 1 and FIG. 2, a crane 4 having a grab 3 suspended by a wire 2 is mounted on a front portion of the hull 1 of the grab ship. Operation 4 is performed.

A long hole 6 extending in the front-rear direction is formed vertically in the center of the hull 1, and a front end of the long hole 6 has a tower 7.
Is erected. The slot 8 has a bracket 8 at the upper end.
A moving spat 10 with a pulley 9 mounted thereon is loosely fitted thereto. A wire 11 having one end attached to the bracket 8 is wound around the pulley 9 and a pulley 12 provided on the top of the tower 7. Is wound around a winch 14 as a lifting device via a pulley 13 provided on the hull 1.

On the other hand, a fixing spat 19 having a pulley 18 attached to the upper end thereof via a bracket 17 is loosely fitted in a hole 16 formed in the base of a tower 15 standing upright at the rear part of the hull 1 so as to be vertically slidable. . After the wire 20 with one end attached to the bracket 17 is wound around the pulley 18 and the pulley 21 provided at the top of the tower 15,
It is wound around a winch 23 as a lifting device via a pulley 22 provided on the hull 1.

The moving spat 10 and the fixing spat 19 descend by gravity by rewinding the winches 14, 23, respectively.
A tapered portion formed at the lower end is driven into the water bottom to restrain the hull 1.

A pair of winches 24a, 24b as a traction device are provided on both sides of the rear of the hull 1, and two wires 25a, 25b having one ends attached near the lower end of the moving spat 10 are provided at the stern. The winches 24a and 24b are wound around pulleys 26 and 27, respectively.

As shown in FIGS. 3 to 5, a buffer sleeve 28 is loosely fitted in the long hole 6 formed in the hull 1 over the entire length in the vertical direction. The cushioning sleeve 28 includes a sleeve main body 28m formed in a cylindrical shape and extending vertically in the elongated hole 6, and substantially rectangular flange portions 28a and 28b respectively connected to upper and lower ends of the sleeve main body 28m. Each of the flange portions 28a, 28b is formed to have a larger diameter than the sleeve main body 28m, and is in sliding contact with both inner side surfaces of the long hole 6 with a slight gap. A pair of brackets 29 project from both sides of the upper flange 28a, and a pair of right and left guide rails laid along both sides of the elongated hole 6 on the upper surface of the hull 1 are provided on the bracket 29. It is rollingly engaged with 31 respectively. As is apparent from FIG. 5, the upper surface of the guide rail 31 is lower on the bow side with respect to the horizontal deck surface of the hull 1, that is, the winch as a traction device.
Towing direction of the moving spat 10 of 24a, 24b (first, second,
(Leftward in FIGS. 5 and 6).

Next, the operation of the embodiment of the present invention having the above-described configuration will be described.

As shown in FIG. 1, a normal dredging operation is performed in a state where both the moving spat 10 located at the front end of the long hole 6 and the fixing spat 19 located at the stern are driven into the water bottom to fix the hull 1. Will be

In order to move the hull 1, as shown in FIG. 6, the wire 20 is first wound up by the winch 23, and the fixing spat 19 is pulled up from the bottom of the water. Then, the lower part of the moving spat 10 is moved by the pair of winches 24a, 24b. The wires 25a and 25b bound to are pulled. Then, the moving spat 10 is guided by the long hole 6 integrally with the cushioning sleeve 28 and moves rearward, and the cushioning sleeve 28 is slightly raised by the roller 30 rolling on the inclined guide rail 31. And this moving spat
Due to the relative movement between the hull 1 and the hull 1, the hull 1 advances by the length of the long hole 6. At this time, the forward direction of the hull 1 can be controlled by adjusting the tension of the left and right wires 25a, 25b by providing a difference in the winding speed of the left and right winches 24a, 24b.

When the hull 1 advances by the length of the long hole 6 in this way,
The fixing spat 19 is again driven into the bottom of the water, and then the winch 14 winds the wire 11 and pulls the moving spat 10 from the bottom. Then, the cushioning sleeve 28 supported by the guide rail 31 via the roller 30 acts on the guide rail 31 by the action of gravity.
, And automatically returns to the tip of the long hole 6.

Thus, the guide rail 31 in which the roller 30 is inclined forward and downward.
In the process of advancing from the uppermost portion (rear end portion) and automatically returning, the wire 11 for suspending the moving spat 10 from the tower 7 is used.
The portion between the pulley 12 and the spat 10 is inclined with respect to the vertical line as shown in FIG. 6, and the horizontal component of the tension of the wire 11 with respect to the moving spat 10 is determined by the winch 24a as a traction device. , 24b because the pulley 12 is arranged so as to face the opposite side to the towing direction (leftward in FIGS. 1, 2, 5, and 6) with respect to the moving spat 10, that is, toward the front of the ship.
This horizontal component acts in a direction that assists the moving spat 10 to advance, and the buffer sleeve 28 can smoothly advance integrally with the moving spat 10.

The moving spat 10 that has returned to the tip of the long hole 6 is driven into the water bottom again, and the hull 1 can move to a predetermined position by repeating the above cycle.

To change the direction of the hull 1,
In a state where 0 or only one of the fixing spats 19 is driven, the crane 4 may be turned by throwing the grab 3 into the bottom of the water. In this case, the hull 1 rotates in a predetermined direction around the moving spat 10 or the fixing spat 19 due to the reaction received from the water bottom by the rotation of the crane 4.

During the dredging operation, the hull 1 is shaken by the wind wave, and the movement of the hull 1 is further increased particularly when moving or turning when only the movement spat 10 is driven into the water bottom. At this time, the moving spat 10 and the long hole 6 formed in the hull 1 violently rub against each other, but the buffer sleeve 28 interposed between the moving spat 10 and the long hole 6 prevents direct sliding between the two. Is prevented. That is, the moving spat 10 is smoothly slid on the inner surface of the cushioning sleeve 28 to be protected from abrasion and deformation, and the long holes 6 are in sliding contact with the flanges 28a, 28b of the cushioning sleeve 28 having a larger diameter than the moving spat 10. This alleviates the stress concentration and prevents the damage.

As described above, the embodiments of the present invention have been described in detail. However, the present invention is not limited to the above embodiments, and various small design changes can be made without departing from the present invention described in the claims. It is possible to do.

For example, in addition to the wires 25a and 25b connected to the winches 24a and 24b from the lower part of the moving spat 10 via the rear part of the hull 1, a wire connected to the winch via the front part of the hull 1 is further mounted. Then, the moving spat 10 can be towed in both front and rear directions, and the hull 1 can be moved rearward.

C. Effects of the Invention As described above, according to the invention of each claim, the buffer sleeve through which the moving spat is vertically slidably inserted is fitted slidably in the longitudinal direction formed in the hull in the longitudinal direction. Therefore, even if the hull is shaken by the wind wave, the moving spat and the long hole are prevented from directly rubbing each other, so that the wear and damage of the sliding portion between the moving spat and the long hole can be effectively prevented.

Further, in particular, the buffer sleeve includes a sleeve body extending vertically in the elongated hole, and a sleeve body connected to upper and lower ends of the sleeve body so as to slidably contact front and rear inner surfaces of the elongated hole, respectively. A pair of upper and lower flange portions having a larger diameter than the upper end portion of the buffer sleeve, and rollers capable of rolling on guide rails provided along both sides of the long hole on the upper surface of the hull are provided respectively. So
The self-weight of the cushioning sleeve can be easily supported on the hull via the rollers and the guide rails, while the side pressure acting on the long hole from the sleeve is applied to the sliding contact portions between the upper and lower flange portions and both side surfaces of the long hole. Through (i.e., while securing a long vertical support span) the hull side can be stably and firmly supported. As a result, the cushion sleeve formed vertically long to stably insert and support the moving spat can be extended. Along the hole, it can be slid forward and backward in a stable posture and reasonably and lightly, which can contribute to the improvement of the durability of the sleeve itself. Since only the upper and lower flanges are used, the amount of processing on the sliding surface can be reduced compared to a structure in which the entire outer periphery of the sleeve is used as the sliding surface, which can contribute to cost reduction. Kill. Furthermore, since the upper surface of the guide rail is inclined upward in the direction in which the towing device moves with respect to the moving spat, when the moving spat is pulled up from the water bottom after the movement of the hull using the towing device is completed, the roller The cushioning sleeve supported by the guide rail via the lowering along the inclined surface of the rail by its own weight can automatically return the sleeve to its original position,
Since it is not necessary to use an actuator for the return operation, the structure can be simplified and the handling operation can be simplified.

According to the invention of claim 2, when the roller is at the uppermost portion of the guide rail, the horizontal component of the tension exerted by the wire hanging the moving spat on the spat is different from the spat pulling direction of the pulling device. Can be directed in the opposite direction to assist the automatic return of the buffer sleeve, so that the automatic return of the sleeve can be performed more smoothly and without difficulty.

[Brief description of the drawings]

1 is an overall side view of a glove ship equipped with a moving device according to one embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a sectional view taken along the line III-III of FIG. 1, FIG. Is a sectional view taken along line IV-IV of FIG. 3, FIG. 5 is a sectional view taken along line VV of FIG. 3, and FIG. 6 is an overall side view of the glove ship illustrating the operation of the present invention. DESCRIPTION OF SYMBOLS 1 ... Hull, 3 ... Grab, 4 ... Crane, 6 ... Slot, 10 ... Spat for movement, 11 ... Wire, 12 ... Pulley, 14, 23 ... Winch as lifting device, 19 …… Fitting spat, 24a, 24b …… Winch as traction device, 2
8 ... Buffer sleeve, 28a, 28b ... Flange, 28m ...
Sleeve body, 30 ... Roller, 31 ... Guide rail

Claims (2)

(57) [Claims] A moving spat (10) loosely fitted in a longitudinally extending slot (6) formed substantially in the center of a hull (1).
A fixing spat (19) loosely fitted to a portion provided at a rear portion of the hull (1); a crane (4) rotatable around a vertical axis with respect to the hull (1); (4) A grab (3) suspended from above and an elevating device (14, 23) for driving each of the spats (10, 19) up and down and driving them into the water bottom.
And a traction device (24a, 24b) for moving the moving spat (10) in one direction along the long hole (6), wherein the moving spat (10) is vertically slid. A buffer sleeve (28) movably inserted is fitted in the elongated hole (6), the buffer sleeve (28) includes a sleeve body (28m) extending vertically in the elongated hole (6), and the sleeve. A pair of upper and lower flanges having a diameter larger than that of the sleeve main body (28m), which are provided continuously at the upper and lower ends of the main body (28m), and slidably contact the inner surfaces of the long hole (6). 28a, 28b)
Rollers (30) that can roll on guide rails (31) provided along both sides of the long hole (6) on the upper surface of the hull (1) are provided on both sides of the upper end of the cushioning sleeve (28). ) Is provided, and the upper surface of the guide rail (31) is inclined upward in the direction of traction with respect to the moving spat (10) of the traction device (24a, 24b). Moving equipment. 2. A wire (11) of an elevating device (14) for raising and lowering the moving spat (10) is provided on the moving spat (10).
The upper end of the moving spat (10) is suspended via a pulley (12) disposed above the roller and the pulley is suspended when the roller (30) is at the top of the guide rail (31). The wire (11) between the (12) and the moving spat (10) is inclined with respect to the vertical line, and the horizontal component of the tension of the wire (11) on the moving spat (10) is opposite to the pulling direction. A grab boat moving device according to claim 1, characterized in that the pulley (12) is arranged so as to be oriented.