JP4771033B2 - Seat laying hangers - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hanging tool provided in a sheet laying device that automatically lays underwater laying sheets such as sandproof sheets, water shielding sheets, and seeding sheets.
[0002]
[Prior art]
For example, as a sheet laying device for laying a sandproof sheet for preventing earth and sand from leaking through a foundation such as a landfill revetment or a breakwater, a device described in JP-A-9-165732 is known. This is provided with a hanging tool provided with two support units having a rotating shaft for detachably supporting a sheet roll in which a sandproof sheet is wound around a shaft member on a long body frame having a hanging metal fitting on the upper surface, Based on position information obtained by surveying means including GPS and an ultrasonic surveying system, the suspension tool is moved by a crane operation from a work ship, and a sandproof sheet is fed from the sheet roll. However, there is an advantage that a sandproof sheet can be laid reliably and easily on a sheet laying surface having a large water depth.
[0003]
By the way, according to the sheet laying apparatus described in the above publication, the sheet roll can be exchanged for the hanging tool by placing the sheet roll on a pair of roll support bases installed on the work boat and placing the sheet roll on the roll support base. On the other hand, the crane is operated by a crane, and the end flange of the shaft member of the sheet roll and the end flange of the rotation shaft of the support unit are combined and bolted (the publication [0025], [ [0026] column etc.). However, according to such an exchange method, since the work ship itself is shaken in addition to the swing of the suspension tool by the crane operation, the work of positioning the suspension tool with respect to the seat roll becomes quite difficult, and there are many problems in terms of safety. It was a place.
Therefore, recently, provided with pillars at both ends of the main body frame constituting the hanging tool, after placing the hanging tool on the work boat by the leg pillars, the seat roll is wound up by a chain block attached to the main body frame, The position was adjusted with respect to the fixed rotation axis.
[0004]
[Problems to be solved by the invention]
However, according to the use of the above chain block, if the chain block is fixed to the main body frame of the hanging tool and used as a fixing facility, it will rust early in the sea work. There was a restriction that the chain block had to be attached to the frame. In this case, the attachment of the chain block to the main body frame is not only a rather complicated work but also a high place work, and the role of the pedestal provided for the purpose of improving the workability and safety of seat roll replacement is precious. There was a problem of being wasted.
[0005]
On the other hand, when laying the sheet, the end of the sandproof sheet is pulled out from the sheet roll in advance, and the pulled-out end of the sandproof sheet is fixed to the fixing part (the top of the levee body and the rubble mound) on the upper side of the sheet However, according to the use of the hanging tool having the above-mentioned pedestal, the pedestal becomes an obstacle and the hanging tool cannot be brought too close to the fixed part, and the end of the sandproof sheet is considerably long. (5-6m) There was a restriction that it had to be pulled out. However, since the conventional hanging tool does not have a special means for forcibly rotating the rotating shaft, that is, the sheet roll, the end portion of the sandproof sheet must be drawn in advance on the work boat. When the drawer end is long, the drawer end of the sandproof sheet is greatly affected by the wind while moving the lifting tool to the fixed part by crane operation, and the fixing is extremely difficult. In addition, the safety is significantly impaired, and there is a problem that the construction is often interrupted.
[0006]
The present invention has been made in view of the above-described conventional problems, and the first problem is that a means for replacing the sheet roll can be equipped as a fixed facility, and therefore the sheet roll replacement can be performed. An object of the present invention is to provide a hanging tool for seat laying that contributes to improvement in workability and safety.
The second problem is that a means for replacing the sheet roll can be installed as a fixed facility, thereby contributing to improvement in workability and safety of sheet roll replacement, and supporting the sheet roll. An object of the present invention is to provide a sheet laying suspending device that is equipped with means for forcibly rotating a rotating shaft to contribute to improving workability and safety of fixing an end portion of an underwater laying sheet.
[0007]
[Means for Solving the Problems]
The hanging tool according to the present invention has a rotating shaft that detachably supports a sheet roll in which an underwater laying sheet is wound around a shaft member on a long body frame having a hanging metal fitting on the upper surface and leg posts on both ends. The basic configuration is to provide two supporting units.
And the 1st invention for solving the 1st subject is a pair of suspensions of the above-mentioned basic composition. A pair which latches both ends of the suspension member hung on the sheet roll or its shaft member to the body frame. These cylinders are suspended in at least two pairs in the longitudinal direction of the main body frame. In the sheet laying hanger constructed in this way, a cylinder having excellent corrosion resistance is used for exchanging the sheet roll, so that it can be mounted on the hanger as a fixing facility.
Moreover, 2nd invention for solving a 2nd subject is a suspension tool of the said basic structure, A pair which latches the both ends of the suspension member hung on the said sheet roll or its shaft member to the main body frame. The cylinder is suspended in at least two pairs in the longitudinal direction of the main body frame, and further, one of the two support units is driven to rotate the rotation shaft in the support unit using a hydraulic motor as a drive source. Means is provided. In the suspension member for laying the sheet thus configured, in addition to the function and effect according to the first aspect of the invention, the rotation shaft can be rotated by the driving means so that the sandproof sheet can be arbitrarily fed out or rewound. A necessary amount of the underwater laying sheet can be fed out at a position above the fixing portion for fixing the end of the laying sheet, and the end can be fixed, and it is not necessary to pull out the end of the underwater laying sheet in advance on the work boat. As a result, not only the workability and safety of sheet roll replacement are improved, but also the workability and safety of fixing the end of the underwater laying sheet are improved.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
The overall configuration of the sheet laying apparatus targeted by the present invention is substantially the same as that described in Japanese Patent Laid-Open No. 9-165732, and as shown in FIG. 5, the shaft member 1 (FIG. 1) has a sandproof sheet. A work boat 7 equipped with a suspension 4 according to the present invention that rotatably supports a sheet roll 3 wound with 2 and a crane 6 that supports the suspension 4 suspended through a wire 5, and 4 A global positioning system (GPS) including a single satellite 8, a GPS mobile station 9 on the work ship 7 and a land-based GPS fixed station 10, two ultrasonic transmitters 11 provided on the suspension 4, and a work ship 7. And an ultrasonic surveying system including three ultrasonic receivers 12. In FIG. 5, 13 indicates a GPS receiving antenna, 14 indicates a wireless transmitting antenna, and 15 indicates a wireless receiving antenna.
[0009]
The seat laying device described above calculates the current position of the work ship 7 based on the GPS signal captured by the GPS mobile station 9 and also uses the current position of the work ship 7 based on the GPS signal transmitted from the GPS fixed station 10. Is provided with an arithmetic processing unit (not shown) having a function of correcting the above. This arithmetic processing unit also has a function of taking the ultrasonic signal transmitted from the ultrasonic transmitter 11 through the ultrasonic receiver 12 and calculating the relative distance between the work boat 7 and the hanging tool 4. Therefore, the position (absolute position) of the hanging tool 4 can be grasped from the calculation result of the calculation processing device. Since this arithmetic processing unit is described in detail in the above-mentioned Japanese Patent Application Laid-Open No. 9-165732, only the outline is described here.
The sheet laying device also includes a monitor that wraps the absolute position of the hanger 4 obtained by the arithmetic processing device on the cross-sectional shape of the sheet laying surface measured in advance and displays it in real time. While suspending the position of the hanging tool 4 on the monitor, the hanging tool 4 can be arbitrarily moved along the seat laying surface.
[0010]
As shown in FIGS. 1 to 4, the hanging tool 4 according to the present invention has a pair of hanging brackets 20 on which the hanging wire 5 of the crane 6 is hung on the upper surface and has leg columns 21 and 22 at both ends. A main body frame 23 of a scale, and a support unit 24 which is disposed at a portion of both ends of the main body frame 23 adjacent to the inner side of the both leg posts 21 and 22 and rotatably supports the shaft member 1 of the sheet roll 3. , 25.
[0011]
The main body frame 23 constituting the hanger 4 is made of H-shaped steel, and is arranged in a vertical posture so that the web stands upright, and a plurality of longitudinal positions are reinforced by reinforcing plates 26.
As shown in FIG. 2, each of the pedestals 21 and 22 has a fixed plate 27 fixed to both ends of the main body frame 23 and a pair of left and right extending from the fixed plate 27 in the opening direction. It consists of a leg piece 28 and a plurality of reinforcing beams 29 bridged between the pair of left and right leg pieces 28, and the whole is triangular.
[0012]
On the other hand, each of the support units 24 and 25 includes a support frame 30 that is fixed to the lower surface of the main body frame 23 so as to extend in a direction orthogonal to the lower surface of the main body frame 23, and is perpendicular to the lower surface of the support frame 30. A pair of left and right struts 31 that are lowered, a roller frame 33 that is disposed between the pair of struts 31 and is connected to the strut 31 via a joint portion 32, and the roller frame 33 A rotation shaft 35 rotatably supported by a plurality of rollers 34 arranged concentrically is provided. Each rotary shaft 35 can be detachably supported by attaching the end flange 1a of the shaft member 1 of the sheet roll 3 to a flange 35a provided at one end thereof and bolting. (FIG. 1).
[0013]
Two pairs of cylinders 40 and 41 are suspended from the main body frame 23 of the hanging tool 4 at a slightly shorter interval than the shaft member 1 of the sheet roll 3. As shown in FIG. 4, each pair of cylinders 40 and 41 is provided with a mounting pin with its rod 43 facing downward at both ends of a bracket 42 fixed to the upper surface of the main body frame 23 at right angles thereto. 44 is attached to the shaft. Thus, each mounting pin 44 extends in parallel with the axis of the rotary shaft 35, whereby each pair of cylinders 40, 41 is arranged so as to be relatively rotatable on both sides of the main body frame 23. Each pair of cylinders 40, 41 serves to suspend and support the sheet roll 3 or its shaft member 1, and the tip of each rod 44 is hung around the sheet roll 3 or its shaft member 1. A locking member 46 for locking the suspension belt (suspending member: may be replaced with a chain or wire) 45 so as to be detachable is fixed. More specifically, a bolt insertion hole (not shown) is formed at the tip of the locking member 46, and the bolts 47 passed through the bolt insertion hole are used to connect the eyes 45a at both ends of the suspension belt 45. Both ends of the passed U-shaped metal fitting 48 are connected. A switch valve 49 for supplying / discharging oil to / from each of the pair of cylinders 40, 41 is attached to one leg column 22 of the hanging tool 4 (FIG. 1). Is connected to a hydraulic pressure source.
[0014]
On the other hand, the left support unit 24 as viewed in FIG. 1 is provided with a drive device (drive means) 50 for rotating the rotation shaft 35. As shown well in FIGS. 1 and 2, the drive device 50 includes a hydraulic motor 52 provided on a bracket 51 fixed to the lower surface of a roller frame 33 constituting the support unit 24, and a rotating shaft in the support unit 24. 35, a large sprocket 53 fixed to the projecting end of the pedestal 21, a small sprocket 54 fixed to the output shaft end of the hydraulic motor 52, and a chain 55 wound around the sprockets 53 and 54. It is made up of. The hydraulic motor 52 can rotate in any direction left or right, and the rotation is transmitted to the rotating shaft 35 via both sprockets 53 and 54 and the chain 55, and the rotating shaft 35 also rotates arbitrarily left or right. It starts to rotate. Of course, the drive device 50 may employ a belt drive system, a gear drive system, or the like instead of the chain drive system described above.
[0015]
Here, at the winding end of the sandproof sheet 2 constituting the sheet roll 3, the end portion of the sandproof sheet 2 is fixed to a fixing portion (the top end of a bank body or a rubble mound) on the upper side of the sheet laying surface. A number of string-like bodies 16 (FIG. 1) are attached.
The hanging tool 4 includes an underwater camera, an ultrasonic sounding instrument that measures the distance between the hanging tool 4 and the seat laying surface, or a rotation amount detector that detects the amount of rotation of the rotating shaft 35. However, illustration of these is omitted.
[0016]
Hereinafter, a sheet laying method using the sheet laying device configured as described above will be described.
When attaching sheets, a plurality of sheet rolls 3 are prepared on the work boat 7 or a separately prepared trolley, and these sheet rolls 3 are placed and fixed on a pedestal (not shown) having a predetermined height. After the work boat 7 is towed and moored at the construction site, the lifting tool 4 is lifted by the crane 6 and the lifting tool 4 is positioned so that the main body frame 23 is positioned above one seat roll 3 on the pedestal. Is placed on the work boat 7 or the carriage, and after this placement, a hydraulic pressure source (not shown) is connected to the switching valve 48. Next, the suspension belt 45 is wound around the sheet roll 3, and the eyes 45 a at both ends thereof are locked to the locking members 46 of the pair of cylinders 40, 41 using the U-shaped metal fittings 48 and the bolts 47. At this time, each pair of cylinders 40 and 41 extends their rods 43, whereby it is possible to perform a locking operation directly from the floor, and a dangerous high-place operation becomes unnecessary. Next, the rods 43 of the pair of cylinders 40, 41 are shortened synchronously to lift the sheet roll 3, and the end flange 1a of the shaft member 1 is connected to the flange 35a of the rotating shaft 35 in the support units 24, 25. And both flanges 1a and 35a are bolted.
[0017]
When the attachment of the sheet roll 3 to the suspension 4 is completed, the rod 43 of each pair of cylinders 40 and 41 is extended, the bolt 47 is loosened, and the suspension belt 45 is pulled from the locking member 46 at the tip of each rod 43. Remove. Next, each rod 43 of the pair of cylinders 40 and 41 is shortened to the shortened end, and at this stage, the switching valve 49 is disconnected from the hydraulic power source, and the crane 4 is operated to fix the hanging tool 4 to the upper portion of the seat laying surface. Move to the vicinity of. Thereafter, the hydraulic motor 52 in the driving device 50 is operated, the rotation is transmitted to one rotating shaft 35, the sheet roll 3 is rotated, and the sandproof sheet 2 is fed out from the one end by a necessary length (5 to 6 m). . After that, the operator grasps the string-like body 16 hanging from the edge of the sand-proof sheet 2 by hand, and sequentially binds it to a locking bar installed in advance on the fixing portion. The fixing work of the part ends. That is, in the present embodiment, the end of the sand-proof sheet 2 is fed out for the required length by forcibly rotating the rotary shaft 35 in the vicinity of the fixed part, so that the end of the sand-proof sheet 2 is drawn on the work ship 7 in advance. Therefore, the end of the sandproof sheet 2 can be fixed efficiently and safely without being greatly affected by the wind as in the case where the hanger 4 is moved.
[0018]
Thereafter, the position of the suspension 4 is indexed by positioning means including the GPS 8, the ultrasonic oscillator 11 and the ultrasonic receiver 12, and the position of the suspension 4 is tracked on the monitor of the display while the suspension 4 is tracked. The tool 4 is moved at a constant speed along the sheet laying surface, and at the same time, the hydraulic motor 52 of the driving device 50 is operated to rotate the sheet roll 3 at a constant speed by the rotation of the rotating shaft 35. Thereby, the sandproof sheet 2 is gradually drawn out from the sheet roll 3 and is gradually laid on the sheet laying surface. At this time, the laying state is monitored by an underwater camera (not shown) provided on the hanger 4 and the distance between the hanger 4 and the seat laying surface is confirmed by an ultrasonic sounding instrument (not shown) provided on the hanger 4. If there is any abnormality, stop the work immediately.
[0019]
When the entire amount of the sandproof sheet 2 of the sheet roll 3 is thus laid, the lifting tool 4 is pulled up to the sea, and the lifting tool 4 is placed on the work boat 7 or the trolley. First, a hydraulic pressure source (not shown) is connected to the switching valve 49, and then each rod 43 of the pair of cylinders 40, 41 is extended, and the locking member 46 at the tip of the rod 43 is hung on the sheet roll 3. The both ends of the suspended belt 45 are locked. Next, the rods 43 of the pair of cylinders 40 and 41 are shortened, and the operation of the pair of cylinders 40 and 41 is stopped when the suspension belt 45 comes into contact with the empty shaft member 1 from the lower side and is tensioned. In this state, the bolt that joins the flange 35 a of each rotating shaft 35 and the end flange 1 a of the shaft member 1 is removed, and the shaft member 1 is separated from the rotating shaft 35. After the separation, the rods 43 of the pair of cylinders 40 and 41 are extended to the extended ends so that the shaft member 1 is placed on the pedestal, and then the bolts 47 at the ends of the rods 43 are loosened to loosen the locking members 46. Then, the suspension belt 45 is removed, and thereafter the suspension tool 4 is moved to the position where the new sheet roll 3 is placed, or the new sheet roll 3 is carried into the lower side of the suspension tool 4, and the suspension tool 4 is subjected to the procedure described above. The new sheet roll 3 is supported on the next and the next sheet is laid.
[0020]
In the above-described embodiment, two pairs of cylinders 40 and 41 are mounted on the main body frame 23 of the hanging tool 4, and the driving device 50 that rotationally drives the rotating shaft 35 is provided on one support unit 24. The present invention may be configured to include only one of the cylinders 40 and 41 and the driving device 50. However, when only the cylinders 40 and 41 are provided, it is desirable to provide a braking means for braking the rotation of the rotating shaft 35.
[0021]
【The invention's effect】
As described above in detail, according to the first invention, since the cylinder having excellent corrosion resistance is equipped as a fixing facility used for replacement of the sheet roll, the installation and removal work of the facility becomes unnecessary, and the seat The workability and safety of roll exchange are significantly improved.
Further, according to the second invention, in addition to the function and effect according to the first invention, since the drive means for forcibly rotating the rotation shaft is equipped, the end portion of the underwater laying sheet is fixed to the fixing portion. The necessary amount can be paid out in the vicinity of, so that it is not greatly affected by the wind, and the workability and safety of fixing the end of the underwater laying sheet are remarkably improved. Further, since this drive means uses a hydraulic motor as a drive source, its structure is simple and its operation can be stably maintained over a long period of time .
[Brief description of the drawings]
FIG. 1 is a side view showing an overall structure of a hanging tool for laying a sheet according to the present invention.
FIG. 2 is a front view showing the overall structure of the present hanging tool.
FIG. 3 is a front view showing a structure of a support unit constituting the present hanging tool.
FIG. 4 is a front view showing a mounting structure of a cylinder constituting the present hanging tool.
FIG. 5 is a perspective view schematically showing an overall structure of a sheet laying apparatus to which a hanging tool according to the present invention is applied.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Shaft member 2 Sand prevention sheet 3 Sheet roll 4 Suspension tool 7 Work ship 20 Suspension metal fittings 21 and 22 Leg pillar 23 Main body frame 24 and 25 Support unit 35 Rotating shaft 40 and 41 Cylinder 45 Suspension belt (suspending member)
50 Driving device (driving means)
52 Hydraulic motor

Claims (2)

Two support units having a rotating shaft for detachably supporting a sheet roll having an underwater laying sheet wound around a shaft member are provided on a long body frame having a hanging metal fitting on the upper surface and pedestals at both ends. In the hanging tool for sheet laying
At least two pairs of cylinders for locking both ends of the seat roll or the suspension member hung on the shaft member are suspended on the main body frame in the longitudinal direction of the main body frame. Hanging tool. Two support units having a rotating shaft for detachably supporting a sheet roll having an underwater laying sheet wound around a shaft member are provided on a long body frame having a hanging metal fitting on the upper surface and pedestals at both ends. In the hanging tool for sheet laying
At least two pairs of cylinders that engage both ends of the suspension member hung on the sheet roll or its shaft member are suspended from the main body frame in at least two pairs in the longitudinal direction of the main body frame. One of them is provided with a driving means for rotationally driving a rotary shaft in the support unit using a hydraulic motor as a drive source.

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