JPS6214478B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a hydraulic trawl winch including:
It relates to a device that automatically removes nets when they become entangled with rocks on the ocean floor (commonly known as root anchors).

[Conventional technology]

When using a trawl winch, if the fishing net becomes entangled in the seine, abnormal tension will be created in the rope.
Not only can it damage ropes and nets, but it can also make the work itself impossible. In order to remove this anchorage, conventional methods involved manually operating a winch to repeatedly wind in ropes, nets, etc., or performing special maneuvers to remove the anchorage.

[Problem that the invention seeks to solve]

However, such conventional methods require enormous labor and are extremely inefficient. Therefore, there has been a demand for the development of a highly efficient removal device and method.

The present invention was made in response to such demands by providing a removal device that can automatically remove a root anchor without damaging ropes, nets, etc.

[Means for solving problems]

The features of the means according to the present invention include a hydraulic pump unit, a hydraulic motor connected to a winch drum rotated by hydraulic oil from the hydraulic pump unit, and a hydraulic motor that controls the rotational direction and speed of the hydraulic motor. control valve and
The winch drum is further provided with a rotation angle detector for detecting the rotation angle of the winch drum, and a detection signal of the rotation angle detector is fed back to the valve controller. , a hydraulic trawl winch incorporating a device that maintains the rotation of the winch drum within a certain range of forward and reverse directions; a hook detection device for detecting overpressure due to entanglement of a seine net on the hydraulic oil discharge pipe side of the hydraulic pump unit; and an automatic operation memory circuit in which a signal for repeatedly rotating the hydraulic motor in forward and reverse directions within a certain range is stored in advance, and this automatic operation memory circuit is connected to the valve controller. The automatic operation memory circuit is energized by the detection signal of the detection device, and the valve controller is operated.

[Effect]

Since the device of the present invention is constructed as described above, when the fishing net becomes entangled while carrying out seining work with the winch drum held at a fixed position, the tension of the rope increases. If the tension increases, a torque will inevitably act on the winch drum and the hydraulic motor connected thereto in the direction of rope unwinding (reverse rotation), causing the winch drum to rotate in that direction.

By the way, as mentioned above, the winch drum has a built-in device that detects the rotation angle of the winch drum and maintains the rotation of the winch drum within a fixed range of forward and reverse angles. When the winch drum rotates in the unwinding direction (reverse rotation), the winch drum is operated in the rope winding direction (normal rotation) by the operation of the above-mentioned device.

Then, the hydraulic fluid on the hydraulic motor side is pushed back through the discharge pipe of the hydraulic pump. In other words, the oil pressure in the discharge pipe increases due to the reverse flow.

When the pressure in the discharge pipe increases, an overpressure detection device provided in the discharge pipe is activated. In other words, the occurrence of a root in the fishing net is detected.

At the same time, the detection signal from the rooting detection device energizes an automatic operation memory circuit connected to a valve controller that operates a control valve that controls the rotational direction and speed of the hydraulic motor.

As mentioned above, this automatic operation memory circuit has previously stored signals that cause the hydraulic motor to perform unwinding and retracting operations, that is, a signal that causes the hydraulic motor to repeat forward and reverse rotation operations. Therefore, when this automatic operation memory circuit is energized, the valve controller and control valve are automatically switched and operated, and the hydraulic motor is operated in accordance with the previously memorized signals for unwinding and winding. Perform reverse alternating rotation operation.

As a result, the rope wound around the winch drum undergoes unwinding and winding operations, and by repeating these operations, the anchorage is automatically removed.

[Example] Next, the configuration and operation of the present device will be specifically explained based on an example.

First, in FIG. 1, A is a hydraulic pump unit, and B is a hydraulic trawl winch that is operated by hydraulic oil from the hydraulic pump unit A. The hydraulic pump unit A includes an electric motor 1, a hydraulic pump 2 driven by the electric motor, and a relief valve 3. 5 is an expansion tank. The hydraulic trawl winch B includes a control valve 6 for switching the flow rate control direction of hydraulic oil,
It consists of a hydraulic motor 7 and winch drums 8a and 8b rotated by the hydraulic motor 7. The winch drums 8a, 8b are connected to the hydraulic motor 7 via a gear device or the like, and have ropes 9a, 9b connected to the fishing net 13 wrapped around them. The control valve 6 is connected to an electro-hydraulic conversion type valve controller 10 for controlling it. This valve controller 10 is a type of servo mechanism that converts an electric signal input as a control signal for the control valve 6 into a hydraulic signal via a servo valve, an electromagnetic proportional valve, etc., and controls the control valve 6 via an actuator. Configured to operate and control.

That is, the electric signal input to the valve controller 10 is converted into a hydraulic signal, the port position and flow rate of the control valve 6 are controlled by the signal, and as a result, the rotational direction and speed of the hydraulic motor 7 are controlled. It is configured so that it can be done.

Next, the winch drum 8a wrapped with rope,
A device that detects the rotation angle of the winch drums 8b and feeds back this detection signal to the valve controller 10 to maintain the rotation of the winch drums 8a and 8b within a certain angle range, in other words, it keeps the length of the rope constant during seine netting. The rope holding device for holding the rope is a rotation angle detector 16 that has a potentiometer (variable resistor) attached to the rotating shaft of the winch drums 8a and 8b.
It is composed of That is, the rotation angle of the winch drums 8a and 8b is electrically detected, and the output voltage thereof is inputted to the electro-hydraulic conversion type valve controller 10 via the amplifier 11. To be more specific, ropes 9a, 9
b is displaced in either the unwinding or winding direction and the rotation of the winch drums 8a, 8b changes in either the forward or reverse direction, an output voltage corresponding to the change is input to the valve controller 10, and the control valve Activate 6. As a result, the hydraulic motor 7 is controlled to rotate in forward and reverse directions so that the winch drums 8a, 8b can always be maintained within a constant rotation angle range. That is, the rope is held at a constant length.

Next, when the fishing net 13 becomes entangled, the entrapment detector 4 is constructed by assembling a pressure switch on the discharge pipe side of the hydraulic pump 2, and detects excessive pressure generated on the discharge pipe side of the hydraulic pump 2. By doing so,
The system is designed to detect the root cause of this problem.

Reference numeral 12 receives a detection signal when it is transmitted by the pressure detector 4 comprising the pressure switch, and transmits an operation signal to an electro-hydraulic conversion type valve controller 10 that controls and operates the control valve 6. This is an automatic operation memory circuit for.

Note that this automatic operation memory circuit 12
The repeated signals for unwinding and winding a and 9b are generated and stored in advance by a combination of electrical equipment such as a power supply, a timer, and a relay, and is configured as a kind of memory circuit.

14 is a remote control transmitter for operating the valve controller 10 when manually operating the troll winch B. 15 is a switching circuit that selects each output of the automatic operation memory circuit 12 and the remote control transmitter 14 and inputs the selected output to the amplifier 11.

17 is a switch for inputting a detection signal from the rotation angle detector 16 to the amplifier 11;

Next, the operation of the device of the present invention will be explained. First, the switch 17 is closed and a device for maintaining the rotation angles of the winch drums 8a, 8b within a constant rotation angle range is operated to carry out seining.

In such a state, when a root entanglement occurs as shown in FIG. 2, the tension of the ropes 9a and 9b increases, causing the hydraulic motor 7 connected to the winch drums 8a and 8b to move in the unwinding direction (reverse rotation). rotational force is applied to it, and it rotates in that direction.

However, since the winch drums 8a and 8b are equipped with a device that maintains the above-mentioned rotation angle within a constant rotation angle range, the control valve 6 is actuated by the action of this device, and the winch drums 8a and 8b are The winch drums 8a and 8b are rotated in a direction opposite to that of the winch drums 8a and 8b in order to maintain the winch drums 8a and 8b within a constant rotation angle.

That is, the control valve 6 operates the winch drums 8a and 8b in the opposite direction, in other words, in the rope winding direction, and the hydraulic motor 7 is rotated in the unwinding direction by the tension of the ropes 9a and 9b due to the hook. . Then, the hydraulic oil of the hydraulic motor 7 is returned to the discharge pipe side of the hydraulic pump 2.
Therefore, the pressure on the discharge pipe side increases.

Since an overpressure detecting entrapment detector 4 consisting of a pressure switch is incorporated on the discharge pipe side, occurrence of entrapment in the fishing net 13 is detected by the entrapment detector 4.

Since the detection signal from the root-lock detector 4 is connected to the automatic operation memory circuit 12 of the valve controller 10, it energizes the automatic operation memory circuit 12 of the valve controller 10.

Automatic operation memory circuit 12 of this valve controller 10
When the switch 17 is energized, a signal stored in advance in this circuit for operating the hydraulic motor 7 in forward and reverse rotation opens the switch 17 and the amplifier 11.
The signal is input to the valve controller 10 via the control valve 6, and the control valve 6 is operated.

As a result, the hydraulic motor 7 rotates the winch drums 8a, 8b in forward and reverse directions, winds out the ropes 9a, 9b once to several times in response to pre-stored signals, and repeats the winding. That is, since the winch drums 8a, 8b repeat unwinding and winding, the ropes 9a, 9b wound around the winch drums 8a, 8b
The ropes 9a and 9b also perform unwinding and winding operations.
The net connected to the net moves, and the anchorage comes off. After that, the automatic operation memory circuit 12 of the valve controller 10
The switch 17 is closed, and the device that maintains the rotation angle of the winch drums 8a, 8b within a constant rotation angle range is operated again, and then the winch drums are stopped.

If, in the above-mentioned unhooking operation, the anchorage does not come off and the net is towed again, the oil pressure will rise and the anchorage detector 4 will operate again, so the unwinding and entrainment will be carried out in the same way as above. and remove the roots. If the anchor is not released even after repeating such operations several times, it is possible to store in advance in the automatic operation memory circuit 12 of the valve controller 10 controls such as issuing a warning or stopping the vessel. good.

〔Effect of the invention〕

As described above, the present invention includes a valve controller that performs a control operation of the control valve, a device that maintains the position of the winch drum constant, a root trap detector, and a detection signal of the root trap detector. It is equipped with a valve control automatic operation memory circuit that allows the troll winch to continuously repeat the unwinding and winding of the trawl winch, which is energized by the trawl winch.
Its roots can be removed. Therefore, the labor required to operate the trawl winch and maneuver the ship can be significantly reduced, and damage to the ropes and nets can be prevented. In particular, since the removal work, that is, the work of unwinding and winding the rope, is performed repeatedly, the anchorage can be removed reliably.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the de-rooting device for a hydraulic trawl winch according to the present invention.
The hydraulic circuit diagram, FIG. 2, is an explanatory diagram showing the roots. A... Hydraulic pump unit, B... Troll winch, 1... Electric motor, 2... Hydraulic pump, 3... Relief valve, 4... Rooting detector, 6... Control valve, 7... Hydraulic motor, 8a, 8b... Winch drum, 9a , 9b... Rope, 10... Valve controller, 11... Amplifier, 12... Automatic operation memory circuit, 1
3...Fishing net, 14...Remote control transmitter, 15...Switching circuit, 16...Rotation angle detector, 17...Switch.

Claims (1)

[Claims] 1. A hydraulic pump unit, a hydraulic motor connected to a winch drum rotated by hydraulic oil from the hydraulic pump unit, and a control valve that controls the rotational direction and speed of the hydraulic motor.
The winch drum is further provided with a rotation angle detector for detecting the rotation angle of the winch drum, and a detection signal of the rotation angle detector is fed back to the valve controller. , a hydraulic trawl winch incorporating a device that maintains the rotation of the winch drum within a certain range of forward and reverse rotation, and a hook detection device for detecting overpressure due to entanglement of a seine net on the hydraulic oil discharge pipe side of the hydraulic pump unit. and an automatic operation memory circuit in which a signal for repeatedly rotating the hydraulic motor in forward and reverse directions within a certain range is stored in advance, and this automatic operation memory circuit is connected to the valve controller. An automatic root removal device for a hydraulic trawl winch, characterized in that an automatic operation memory circuit is energized by a detection signal from a detection device, and a valve control device is operated.