JPS6317758Y2 - - Google Patents

Description

[Detailed description of the invention] Conventionally, the work of dropping towing objects such as observation instruments into the sea or storing them from the sea via ultra-long cables of several thousand meters on research ships etc. has been carried out by the following methods. However, each has the following drawbacks. In other words, (i) As shown in Fig. 1, the towed body P is
The means of dropping and recovering the towing body involves connecting the hook of a crane to the towing body as a preparation for hoisting the towing body from the sea surface, but this work involves a worker approaching the towing body using a tugboat, etc., and connecting it manually. This is very dangerous due to the shaking of the tugboat and the shaking of the towing body itself, and is also labor-intensive.

(ii) As shown in Figure 2, those towed and retrieved using the gear loft G or A frame on board the observation vessel are those that are towed as they are without any preparatory work for hook connection as described in (i). It can be lifted, but
The vibration of the ship causes the towing body to swing significantly, and when it is stowed on board, there is a risk that it may come into contact with the hull or various devices on the ship, damaging the towing body. Also,
In order to prevent such collisions, there is a method of supporting the towed object with auxiliary ropes, but this is a dangerous and labor-intensive operation similar to method (i).

(iii) As shown in Figure 3, it is difficult to time the pull-up well when pulling up the towing body from the sea surface onto the slipway S at the stern;
If this misalignment occurs, a large impact force will be applied to the towing body, so it cannot be applied to a towing body that has built-in parts that are vulnerable to impact forces, such as electronic equipment.

(iv) As shown in Figure 4, the method of lifting and recovering objects using a crane C with known dedicated lifting personnel L on board is less safe than methods (i), (ii), and (iii). Although it is expensive, the connection with the towing body is not reliable and requires skill to operate the crane.

Furthermore, the hook body suspended from the tip of the jib of the support ship's crane is lowered underwater along the power supply cable, and after the hook body fits into the socket of the underwater work vehicle, the hook body is lifted and the underwater work vehicle is moved. There are also known devices that are designed to be lifted up and recovered on board a support vessel, but this type of hoisting and recovery device not only requires a special cable for suspending the hook body in addition to the power supply cable, but also requires a special cable for suspending the hook body. Since the water falls along the power supply cable, there are problems such as damage to the power supply cable.

This invention was proposed in view of these circumstances, and aims to safely, quickly, and reliably drop and retrieve a towing body, which is towed underwater using an ultra-long towing cable of several thousand meters, on a mother ship even in rough weather. The purpose of this device is to provide a fully automatic, labor-saving, towing body towing, lifting and recovering device that is capable of carrying out operations. A swing crane is installed on the mother ship at a suitable distance from the towing winch, and the jib automatically expands and contracts in response to changes in cable tension. In the towing body towing and retrieving device for towing and recovering the towed body with minimal vertical and horizontal vibration, the upper end of the towed body is removably fixed to the rotational braking part of a hydraulic winch 18 attached to the tip of the jib of the crane. An upper frame 1 has a rotating device 3 attached to its lower end that rotates around a vertical axis in the opposite direction at the same angle in conjunction with the rotation, and the upper end is pivoted to the rotating device 3 via a vertical pin 5'. Suppressed rotation around the vertical pin is allowed through a pair of left and right fluid-moving type vibration suppression cylinders 8 which are suspended from the support, and a removable metal fitting 7 to be described later at the rear end of the lower part is pivoted through a horizontal pin 7'. When suspended, a lower frame 5 has a sheave 6 pivotally supported via a horizontal pin for guiding the towing cable to the towing winch 21 after the towing cable is routed around the front end thereof; The upper end of the lower frame is pivotally suspended by a horizontal pin 7', and has a hydraulic cylinder that opens and closes a pair of left and right fixed metal fittings 15, and the fixed metal fittings 15 open and close the cable end metal fitting 16 in conjunction with the contact with the towing body. A removable hardware incorporating automatic locking means for strangling and locking, and a guide sheave 10 attached to both sides of the lower frame 5 and pivoted to the lower part of the removable hardware 7 via a horizontal pin are connected to the towing cable. The above-mentioned removable hardware 7 should be in contact with each other.
It is characterized by comprising a pair of left and right hydraulic cylinders 9 that rotatably urge the horizontal pin 7'.

An embodiment of the present invention will be explained with reference to the drawings.
5A is a front view thereof, FIG. 5B is a front view showing a different embodiment of a part of FIG. 5A, and FIG.
7 is a sectional view taken along - in FIG. 6, and FIG. 8 is a partial side view of an observation ship on which the apparatus shown in FIG. 5 is mounted.

In the above figure, 1 is connected at its upper end to the main shaft or drum of a hoisting winch 18 attached to the tip of a boom 19 of a crane mounted on the tail of the observation vessel, and a swing bearing 2 is attached at its lower end. The upper frame 1 is made up of a rotating frame 3 fixed to the frame 3, which is rotatable around a vertical axis.The upper frame 1 can be freely rotated around the axis of the winch 18 by freeing the hydraulic motor 25 of the hoisting winch 18. Rotate. Reference numeral 4 denotes a swing device that is built into the frame 1 and connected to a vertical shaft fixed to the swing frame 3 with a key, and rotates this in the opposite direction at the same angle in synchronization with the swing angle of the crane 22 around the vertical axis. , 5 is suspended from the rotating frame 3 by a suspension pin 5' in the X-X direction so as to be rotatable in the YZ vertical plane, and the lower end becomes two parallel frame plates, which will be described later. The lower frame 6 pivotally supports the sheave 6 and the removable hardware 7. The lower frame 6 is pivotally connected to the lower frame 5 through a shaft 6' and is attached to the towing body 23 via a cable clamp rod 16. A sheave 7 is used to guide the towing winch 21 which is placed separately in the towing winch 21. The upper end of the sheave 7 is pivotally suspended from the lower frame 5 by a suspension shaft 7'. A fixing hardware 15 for releasably fixing 16, a removable hardware having a position detection hardware 11 at the lower end for colliding with the towing body 23 and detecting its position; 8, both left and right ends of the revolving frame 3 and the lower frame; A pair of vibration suppression cylinders are connected via pins to eye plates protruding from both left and right ends of the lower frame 5, respectively, to suppress lateral vibration around the suspension pin 5' of the lower frame 5; 9 each has one end; is pivoted substantially above the sheave shaft 6' of the lower frame 5, and the other end is pivoted to an eye projecting above the suspension shaft 7' of the removable hardware 7, and is operated by supplying and discharging hydraulic pressure. A pair of guide cylinders for rotating the removable hardware 7 in the X-Z vertical plane around its suspension axis 7'; 10 are the lower portions of four parallel springs 12 each fixed to the upper part of the removable hardware 7; A guide roller is provided protrudingly on the perforated square position detection metal fitting 11 which is fixed to the cable 24 through a rod, and rolls in contact with the cable 24 to regulate the relative position of the detachable metal fitting 7 with respect to the cable 24 at a constant level. , 13
Both ends of the levers 14 are pivotally connected to the inner ends of two levers 14, each of which has its central fulcrum pivotally supported by an eye plate that protrudes laterally from both left and right ends of the removable hardware 7, and is used for supplying and discharging hydraulic pressure. Twist lever 14
By rotating lever 1 around its fulcrum,
A lock cylinder 15 fixes and releases a cable clamp rod 16 via a fixing metal fitting 15 (to be described later) at the other end of the lock cylinder 4. The lock cylinder 15 is slidable in the Y-Y direction while holding the towing cable 24 in the center of the detachable metal fitting 7. A pair of semi-circular abutment grooved fixing hardware 17 releasably clamp and fix the cable clamp rod 16 by expanding and contracting the mutual distance via a link as the lever 14 rotates; A retaining ring 18 is provided protruding from the upper end and is detachably clamped and fixed in the semicircular contact groove of the fixed hardware 15, and is attached to the tip of the tip boom 19 of the crane to connect the upper frame 1 according to the present invention. In addition, it is also used for hoisting and lowering for general cargo handling, and when a moment occurs in the removable hardware 7 due to vibration of the towing body, by applying a constant hydraulic pressure to the hydraulic motor 25 (described later), the hydraulic motor 25
The hoisting winch 20 serves as a brake and prevents the towing body from swinging, and both ends of the hoisting winch 20 are connected via pins between the tip boom 19 and the base boom of the crane, and are connected to the tip boom 19 by supplying and discharging hydraulic pressure. 21 is a cable towing winch mounted on the ship for winding the towing cable 24; 22 is a towing winch 2;
This is a crane established near No. 1.

In such a device, the operation of storing the towed body from the sea will be explained as follows.

(1) Attach this device to the hoisting winch 18 of the crane.

(2) The hydraulic motor 25, the vibration suppression cylinder 8, and the guide cylinder 9 are made free so that the device can be moved freely by external force.

(3) As shown in Figure 8, operate the crane and bring this device to the designated position behind the stern. At that time, the swing angle of the crane and the swing device 4 should be adjusted so that the sheave 6 always faces the direction of the towing winch 21.
synchronously control the turning angle of the same angle in the opposite direction.

(4) When the cable 24 is wound around the towing winch 21, the towed body 23 is pulled up close to the sea surface.

(5) Activate a known overtension protection device (not shown). As a result, when the tension acting on the sheave 6 exceeds the set value, the hydraulic cylinder 20 of the crane contracts and the tip boom 19 moves downward to lower the tension on the cable 24, and when the tension falls below the set value, the hydraulic cylinder 20 extends. Then, the tip boom 19 moves upward so that a specified load is always applied to the cable 24.

(6) Once the towing body has been raised above the sea surface, the overtension protection device will be deactivated.

(7) When the guide cylinder 9 is contracted by supplying and discharging hydraulic pressure, the detachable hardware 7 rotates clockwise around the suspension shaft 7', and the guide roller 10 moves toward the cable 24.
If a constant hydraulic pressure is applied to the guide cylinder 9 thereafter, the guide roller 10 will always maintain a state of contact with the cable even if the towed body swings.

(8) When the cable 24 is further reeled in by the towing winch 21, the towing body 23 comes into contact with the position detection hardware 11, moves further upward against the force of the spring 12, and a limit switch (not shown) is activated, causing the towing winch to close. 21 stops.

(9) At this time, the retaining ring 17 of the cable clamp 16 will be located slightly above the fixed hardware 15.

(10) Operate the lock cylinder 13 and
5 to fix the cable clamp rod 16.

(11) Reverse the towing winch 21 and attach the cable 24
When loosened, the weight of the towing body will be supported by the detachable hardware.

(12) In this state, if a constant hydraulic pressure is applied to the vibration suppression cylinder 8 and the hoisting winch hydraulic motor 25, the vibration of the towed body can be suppressed to a minimum.

(13) Operate the crane and bring the towed body onto the ship. At this time, the swing device 4 swings in synchronization with the swing angle of the crane boom in the opposite direction so as to maintain the sheave 6 in a constant direction.

(14) If this device is removed from the crane after the towing body is stowed on board, the crane can be used for normal crane purposes.

Note that when dropping the towed body into the sea, this can be done in the reverse order to the above.

Retaining ring 1 of cable clamp rod 16
7 is the retaining ring groove 1 as shown in FIG. 5B.
7', a semicircular abutting member of the fixing hardware 15 may be provided with a projecting ridge that fits into the retaining ring groove 17'.

By dumping and storing the towed body through the operations described above, the following effects can be achieved.

That is, (1) the towing body can be thrown and recovered safely and reliably by simply operating the crane and the towing winch without requiring any human power to connect the towing body and the crane.

(2) Holding the towing body at the tip of the boom of the crane. By installing a steadying device on the attachment/detachment device itself, the swinging of the towing body during lifting and retrieval work is minimized to prevent contact accidents. be able to.

(3) By installing an overtension protection device, it is possible to reduce the impact force generated from the shaking of the ship and the towing body itself, and it is possible to prevent excessive loads from being applied to the device.

(4) If this device is removed, the crane can be used for general cargo handling, expanding the scope of use of the crane.

(5) The rotation device allows the lower frame to freely rotate in the direction of the cable so that no excessive force is applied to each part of the towed body throwing and recovery device when lifting the towed body, and once the towed body is After being fixed to the lifting and recovery device, the towing body automatically rotates in the opposite direction at the same angle in conjunction with the rotation of the crane, so that the towing body always points in the direction of the towing winch regardless of the rotation of the crane. Furthermore, by disconnecting the synchronizer as necessary, it is possible to manually direct the towed body in a desired direction.

(6) Since the towing winch is installed separately from the swing crane, it is possible to wind and unwind even long towing cables of several thousand meters without any problems.

(7) A rotary braking part of a hydraulic winch that exerts a braking force based on the fluid friction of oil, which rotates between the hydraulic winch, upper frame, and lower frame around the horizontal axis and around the vertical axis; By regulating only the speed without regulating the displacement through the oscillation suppression cylinder, the oscillation can be non-vibrationally minimized and the towing body can This enables safe, quick and smooth fully automatic dumping and recovery.

In short, according to the present invention, there is a towing winch attached to the mother ship that tows the towing body with an ultra-long towing cable via a metal fitting at the end of the cable, and a towing winch installed on the mother ship near the towing winch at an appropriate distance. A towing body that is erected and has a revolving crane whose jib automatically extends and contracts in response to changes in cable tension, and the towing body is lifted and retrieved through the towing cable under a substantially constant tension with minimal vertical and horizontal vibrations. In the hoisting and recovery device, the upper end is removably fixed to a rotary brake part of a hydraulic winch 18 attached to the tip of the jib of the crane, and is rotated around the vertical axis at the same angle in the opposite direction in conjunction with the rotation of the crane. An upper frame 1 has a rotating rotating device 3 attached to its lower end, and a pair of left and right fluid-moving vibration suppressing cylinders 8 whose upper ends are pivotally suspended from the rotating device 3 via vertical pins 5'. A removable metal fitting 7, which will be described later, is pivotally suspended at the rear end of the lower part via a horizontal pin 7', and the above-mentioned metal fitting 7, which does not extend from the tip connecting metal fitting, is attached to the front end. A sheave 6 for guiding the towing cable to the towing winch 21 after being routed around the lower frame 5 is pivotally supported via a horizontal pin, and the upper end is pivotally suspended on the lower frame by a horizontal pin 7'. It has a hydraulic cylinder that opens and closes a pair of left and right fixed fittings 15, and the fixed fittings 15 move the cable tip fitting 1 in conjunction with the abutment of the towing body.
6, and a guide sheave 10 attached to both sides of the lower frame 5 and pivotally attached to the lower part of the detachable hardware 7 via a horizontal pin, the towing By providing a pair of left and right hydraulic cylinders 9 that rotatably bias the detachable hardware 7 around the horizontal pin 7' so as to contact the cable, the towing body can be safely and reliably thrown and recovered. The present invention is extremely useful industrially because it provides a towing body towing and recovery device that can perform the following operations.

[Brief explanation of drawings]

1 to 4 are explanatory diagrams showing known towing body towing and recovery means, FIG. 5A is a front view showing an embodiment of the device of the present invention, and FIG. 5B is an illustration of FIG. 5A. 6 is a side view of FIG. 5, FIG. 7 is a sectional view taken along - in FIG. 6, and FIG. 8 is a ship equipped with the device of the present invention. Partial side view of 9
The figure is a plan view of FIG. 1...Upper frame, 2...Swivel bearing, 3...
Swivel frame, 4... Swivel device, 5... Lower frame, 5'... Suspension pin, 6... Sheave, 6'...
Shaft, 7...Removable hardware, 7'...Suspension shaft, 8...Sway suppression cylinder, 9...Guide cylinder, 10...
...Guide roller, 11...Position detection hardware, 12...
...Spring, 13...Lock cylinder, 14...
...Lever, 15...Fixing hardware, 16...Cable clamp rod, 17...Retaining ring, 18...
Hoisting winch, 19... Tip boom, 20...
Hydraulic cylinder, 21... Towing winch, 22...
... Crane, 23 ... Towing body, 24 ... Cable, 25 ... Hydraulic motor.

Claims (1)

[Scope of utility model registration request] A towing winch attached to the mother ship to tow the towing body with an ultra-long towing cable via a cable end connecting metal fitting, and a towing winch installed on the mother ship at an appropriate distance near the towing winch and responding to changes in cable tension. In the towing body towing and recovering device, the towing body is tossed and recovered via the towing cable under a substantially constant tension with a revolving crane whose jib automatically extends and retracts. Hydraulic winch 1 attached to the tip of the jib of the above crane
The upper frame 1 has a rotating device 3 attached to its lower end, which is removably fixed to the rotational brake part 8 and rotates around a vertical axis at the same angle and in the opposite direction in conjunction with the rotation of the crane; The rotation device 3 is pivotally suspended via a vertical pin 5', and restrained rotation around the vertical pin is allowed via a pair of left and right fluid-moving vibration suppressing cylinders 8. The removable metal fitting 7 is pivotally suspended via a horizontal pin 7', and a sheave 6 is provided for guiding the towing cable to the towing winch 21 after passing the towing cable extending from the tip connecting metal fitting around the front end. It has a lower frame 5 which is pivotally supported via a horizontal pin, and a hydraulic cylinder whose upper end is pivotally suspended from the lower frame by a horizontal pin 7' and which opens and closes a pair of left and right fixed hardware 15, which the towing body comes into contact with. A removable hardware has a built-in automatic locking means that clamps and locks the cable end hardware 16 with a fixed hardware 15 in conjunction with the above, and a horizontal pin is attached to each side of the lower frame 5 and is attached to the lower part of the removable hardware 7. and a pair of left and right hydraulic cylinders 9 for rotationally biasing the detachable metal fitting 7 around the horizontal pin 7' so that the guide sheave 10 pivotally attached thereto comes into contact with the towing cable. Features: Towing body throw-off and recovery device.