JPH0619438Y2 - Lifting drive device for spat of barge - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a spat lifting / lowering drive device for a barge used to form a work platform for various work equipment such as a pile driver on a river or sea. Is.

(Prior art and its problems) The spat in this type of barge is raised when the barge is towed and lowered when the barge is moored to the working position, so that the lower end ground plate is in the subsea ground. Although the pedestal is fixed at a predetermined level by pushing it into the space, the conventional spat lifting drive device in this type of berth was installed on the floor surface of the pier, so this spat lifting drive device was installed. As a result, the pile driver running on the floor of the pedestal could not approach the four corners of the pedestal where the spat lifting drive was installed.

(Means for Solving the Problems) In order to solve the above conventional problems, the present invention provides
The cylinder unit installed in the pontoon allows the elevator to be driven up and down between a lower limit position, which is substantially flush with the pontoon floor surface, and an upper limit position, which floats above the floor surface. A hole and a spat locking means for locking the spat penetrating the spat up-and-down through hole are provided, and a spat locking means for locking the spat inside the ship below the lower limit position of the lifting body is also provided. , A rack gear portion is provided on the side surface of each of the sputs that can be added and split freely along the lengthwise direction, and the both spat locking means drive the locking pieces that can be engaged with and disengaged from the rack gear parts. The present invention proposes a spat lifting / lowering drive device for a pontoon, which is composed of a drive source for driving the spat.

(Operation of the invention) When the spat is lowered to fix the pontoon, only the locking pieces of the spat locking means on the pontoon side are engaged with the rack gear section on the spat side to fix the spat to the pontoon. In this state, the elevating body is levitated to the upper limit position by the cylinder unit, and then the engaging piece of the elevating body side spat engaging means is engaged with the spat side rack gear part, and the pallet side spat member is engaged. The engaging piece in the stopping means is disengaged from the rack gear portion on the spat side, and in this state, the lifting body is lowered to the lower limit position by the cylinder unit, so that the spat is lowered by the lifting stroke of the lifting body. Hereinafter, by repeating the above operation, the spat can be intermittently lowered by unit stroke, and the grounding plate at the lower end can be pushed into the water bottom ground. Of course, as the spat descends, the individual spats are sequentially added to the upper end of the spat to extend the spat upward.

When the spat is lowered by a predetermined stroke as described above to fix the pontoon, the elevating body is positioned at the lower limit position where it is substantially flush with the floor surface of the pontoon, and at least the spat locking means on the pontoon side is used. The spat is fixed to the pontoon, but at this time, the length of the single spat that is added to the uppermost end of the spat is set so that the upper end of the spat does not protrude beyond the floor surface of the pontoon. Coupled with the fact that the body does not project above the floor surface of the pontoon, it is possible to move the pile driver etc. on the pontoon just above the place where the spat lifting drive device is installed, if necessary.

In addition, if it is attempted to raise and lower the elevating body only within the pontoon,
Although the lifting stroke of the lifting body is very small due to the presence of the lifting drive cylinder unit, as described above, the lifting body is moved between the lower limit position where it is substantially flush with the platform surface and the upper limit position above it. By elevating the space between the elevating body and the elevating body, a long cylinder unit can be used by effectively utilizing the space in the berth. In other words, the unit lifting stroke of the spat can be increased.

When raising the spat, the elevating body may be raised and lowered while alternately operating the spat locking means on the elevating body side and the spat locking means on the pontoon side in the reverse order of the above.

(Embodiment) An embodiment of the present invention will be described below with reference to the attached exemplary drawings.

In FIGS. 1 and 2, (1) is a pontoon, and a spat lifting drive device (2) according to the present invention is provided at a corner portion thereof. (3) is a spat, which is a bottommost spat (5) having a grounding board (4) at the lower end, and a plurality of intermediate spats that are removably sequentially added to the upper end side of this spat (5). It is composed of (6) and a single shortest upper end spat (7). In addition, in FIG. 1, the spat (3) before being lowered (or immediately after being raised) was connected to the bottom end spat unit (5) with all the intermediate spats unit (6) and the top end spat unit (7). Although it is shown in the state, actually, as the spat (3) is lowered (or raised), the intermediate spat single body (6) and the uppermost end spat single body (7) are sequentially added (or sequentially removed). You can do it.

The spat elevating / lowering device (2) is provided on the elevating body (9), which is elevatingly driven by a pair of cylinder units (8) as shown in FIGS. 3 to 6. It is composed of a pair of left and right spat locking means (10) and a spat locking means (11) provided on the side of the pier (1).

As shown in FIG. 3, the lifting body (9) is located at a lower limit position L that is substantially flush with the pedestal floor surface (12), and as shown in FIG. Between the ascending end position H, which has risen a distance,
It is driven up and down by the cylinder unit (8) and has a spat up-and-down through hole (13) in the center thereof.
The cylinder unit (8) has a cylinder body (8
The lower end of a) is pivotally supported by a support shaft (15) on a bracket (14) attached to the bottom of the ship (1), and the piston rod (8b)
The upper end of is supported by a support shaft (17) on a bracket (16) mounted in the elevating body (9). Below the lifting / lowering body (9) at the lower limit position L, the lifting / lowering body (1) is
A spat up-and-down through hole (18) that penetrates vertically is provided concentrically with the spat up-and-down through hole (13) of (9).

The spat locking means (10) of the elevating body (9) and the spat locking means (11) on the side of the ship have the same structure, and can move in a horizontal direction at right angles to the vertical spat (3). The locking piece (19) (20) and the cylinder unit (21) (22) as a drive source for moving the locking piece (19) (20) back and forth. The spat locking means (11) on the) side is arranged near the upper end of the spat lift through hole (18).

Individual spats (5) to (7) constituting the spat (3)
Is a cylindrical steel pipe with rack gears (23) attached to the left and right outer surfaces along the lengthwise direction, and the spat locking means (10) of the lifting body (9) and the barge (1) side. Spat locking means
The locking pieces (19) and (20) in (11) are the rack gear (23)
It is configured to be detachable from. Also, as shown in FIGS. 7 and 8 at the upper end of the lowest-end spat unit (5), the upper end of the intermediate spat unit (6), and the lower end of the uppermost end spat unit (7).
As shown in the figure, a connecting flange (25) with the same outer diameter as the single spat is attached via a small-diameter cylindrical body (24),
As shown in FIG. 6, the connection flanges (25) are overlapped with each other, and bolt holes are provided in the connection flange (25).
The connecting flanges (25) are bolted to each other by using the (26) so that the spats can be added concentrically to each other. Incidentally, (27) is a reinforcing rib plate for improving the attachment strength of the connecting flange (25), and (28) is a hanging eye plate fixed to the inside of the small-diameter cylindrical body (24).

When towing the pontoon (1) or the like, as shown in FIG. 3, only the lowermost end spat (5) is set on the spat lifting drive device (2). At this time, the lifting body (9) is at the lower limit position L.
The bottom end spat alone (5) and the lifting body (9) do not project above the berth floor surface (12).

When lowering the spat (3),
The locking piece (20) of 1) is moved forward by the cylinder unit (22) to engage with the rack gear part (23), and the bottom end spat simple substance (5) is fixed to the ship (1). As shown in Fig. 6, lift the lifting body (9) by the cylinder unit (8) to the ascending limit position H, and suspend the intermediate spat (6) into the lifting pad (9) spat lift through hole (13). , The intermediate spat simple substance (6) is connected to the upper end of the lowermost spat simple substance (5).
In such a state, as shown in the drawing, the locking piece (19) in the spat locking means (10) of the lifting body (9) is moved forward by the cylinder unit (21) and engaged with the rack gear part (23). By doing so, the spat (3) is fixed to the lifting body (9). Then, after the locking piece (20) in the spat locking means (11) on the side of the pier (1) is moved backward by the cylinder unit (22) and disengaged from the rack gear portion (23), the cylinder unit (8 ) To lower the lifting body (9) to the lower limit position L shown in FIG. 3, the spat (3) can be lowered by the lifting stroke of the lifting body (9). When the lifting / lowering body (9) descends to the lower limit position L, the spat (3) is fixed to the ship (1) by the spat locking means (11) on the side of the ship (1).

As described above, only the spat locking means (11) is fixed to the spat, and the lifting body (9) is levitated to the ascending limit position H,
Next, the spat (3) is moved up and down by repeating the operation of lowering the lifting body (9) to the lower limit position L with only the spat locking means (10) fixed. It can be lowered intermittently by stroke.
Of course, when the spat (3) is fixed to the ship (1) by the spat locking means (11), the intermediate spat alone may be used as necessary.
It is possible to extend the spat (3) to the required length by adding (6) or the top end spat alone (7).

In addition, when the lower end grounding plate (4) of the spat (3) is press-fitted into the water bottom ground, the force of pushing the spat by the cylinder unit (8) is necessary. , Spat locking means (10) for the lifting body (9) and pontoon
All of the spat locking means (11) on the (1) side are in a state where the spat is released from the spat, and the spat (3) extended to the required length by the addition of the single spat is lifted (9) and the pier (1). It can also be hung down to the bottom of the water by a crane via the spat lift through holes (13) (18).

When raising the spat (3), contrary to the operation of raising the descending spat, only the spat locking means (10) is fixed to the spat and the lifting body (9) is levitated to the ascent limit position H,
Next, the spat (3) is moved up and down by repeating the operation of lowering the lifting body (9) to the lower limit position L with only the spat locking means (11) fixed to the spat. It can be raised intermittently by strokes.
Of course, after the grounding board (4) of the spat (3) has floated from the bottom of the seabed, both the spat locking means (10) and (11) are released from the spat fixing state, and the spat (3) is lifted by the crane. Can also be raised.

(Effect of the Invention) As described above, according to the spat lifting drive device of the present invention,
When the spat is lowered to a predetermined depth or the spat is pulled up, there is no part that projects onto the floor surface of the pedestal because the lifting body only projects above the floor surface of the pedestal during the operation of raising and lowering the spat. , The length of the bottom end spat or the top end spat of the separable and separable spat should be set so that the top end of the spat does not protrude at all on the floor surface of the carrier or does not protrude so much that it interferes with work on the carrier. By simply setting the settings, it is possible to move the pile driver etc. freely even in the vicinity of the corner of the ship where the spat lifting drive is installed, and work can be performed efficiently.

Moreover, the unit lifting amount of the spat can be set to be relatively large, and the lifting and lowering work of the spat itself can be efficiently performed. Furthermore, as in the case of driving a pinion gear that meshes with a rack gear portion provided in a spat by a motor, a large braking means with a large braking force is not required, and the elevated spat does not have a spat locking means or an elevating body on the side of the ship. It is possible to securely and safely fix it by the spat locking means, and it is possible to make the entire device relatively compact.

[Brief description of drawings]

Fig. 1 is a side view of a corner of a ship showing a state before lowering the spat, Fig. 2 is a side view of a corner of the ship showing a state where the spat is lowered, and Fig. 3 shows a spat lifting drive device. FIG. 4 is a vertical cross-sectional side view of the apparatus, FIG. 6 is a horizontal cross-sectional view of the apparatus, FIG. 6 is a vertical side view of the apparatus in which the lifting body is raised, and FIG. FIG. 8 is a vertical cross-sectional side view, and FIG. 8 is a partial cross-sectional plan view of the spat connecting end portion. (1) …… Boat, (2) …… Spat lifting drive, (3) ……
Spat, (4) …… Grounding board, (5) …… Bottom end spat alone, (6) …… Intermediate spat alone, (7) …… Top end spat alone, (8) (21) (22) …… Cylinder unit, (9) …… elevator, (10) (11) …… Spat locking means, (12) …… Boat floor surface, (13) (18) …… Spat lifting through hole, (19) (20) …… Locking piece, (23) …… Rack gear, (25) …… Flange for connection.

Claims (1)

[Scope of utility model registration request] 1. A lift unit that is driven up and down by a cylinder unit arranged in a pontoon between a lower limit position which is substantially flush with the floor surface of the pedestal and an upper limit position which floats above the floor surface. In, provided with a spat up-and-down through hole and a spat locking means for locking the spat penetrating the spat up-and-down through hole,
Below the lower limit position of the lifting body, a spat locking means for locking the spat is also provided in the pontoon, and each spat that can be replenished and split is provided with a rack gear portion on its side surface along the length direction. At the same time, the both spat locking means is a spat lifting / lowering drive device for a pontoon, which comprises a locking piece that can be engaged with and disengaged from the rack gear section and a drive source for driving the locking piece.