JPH054318B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a rope winding and unwinding device, and more particularly, to a rope winding and unwinding device, which unwinds a rope wound around a winch drum via a pulley block, and The present invention relates to a rope winding and rewinding device for rewinding ropes, and in particular to improvements in this type of device suitable for installation on board a vessel such as a purse seiner.

[Background of the invention]

Prior to explaining the present invention, conventional type (ground-mounted type)
The overall operating system when carrying out cargo handling work using a rope hoisting and unwinding device will be explained based on Fig. 8. In the figure, 1 is a winch, 2 is
1 is a winch drum that winds the wire rope 6 and winds up and unwinds the rope 6; 3 is a brake handle that brakes the winch 1; 4 is a column that has a pulley block 5 at its tip and supports the wire rope 6 at an intermediate position. , 7 indicates a hook attached to the tip of the wire rope 6 to lift the load 8. When lifting the load 8 using this device, the force of the load 8 acts on the wire rope 6 and the rope 6 is lifted.
wire rope 6 is kept under tension.
are wound up into the winch drum 2 in an orderly manner.

However, at the time of reversing (rewinding) the winch drum 2 that suspends the load 8, initially,
The wire rope 6 is kept under tension by the braking operation of the brake handle 3, and therefore the wire rope 6 is wound around the winch drum 2.
is normally unwound, but if the load 8 reaches the ground as shown by 8', unless the reverse operation of the winch drum 2 is stopped immediately, the wire rope 6 will As shown by reference numeral 6', it becomes loose and is wound around the winch drum 2 in a disorderly manner. However, this random winding phenomenon is particularly likely to occur when the load 8 is out of sight because the winch drum 2 cannot be stopped in reverse at an appropriate time. However, if the winding and rewinding operations are repeated while the above-mentioned irregularly wound state is maintained, the loosened wire rope 6' gets caught in the irregularly wound part of the winch drum 2, resulting in a reversely wound state, and the unwinding becomes impossible. There was a risk that the operation would turn into a winding operation and cause an accident.

By the way, the danger of a wire rope being wound up in a disorderly manner in a winch drum is when one load (net) is hoisted and rewound using multiple winches, as in the case of marine fishing. This raises particularly important issues. To explain one example of purse seine fishing, Figure 9 shows the conventional type (onboard type).
Purse seiner (main ship) by rope hoisting and unwinding device
FIG. 2 is an explanatory diagram of the overall operating system when loading the catch of one fish onto another purse seine boat (transfer boat). In Figure 9, S ₁ is the main vessel of the purse seine boat, S ₂ is the transfer vessel of the purse seine boat, and S 2 is the main vessel of the purse seine boat.
A is a winch drum that is installed on the ship S ₁ and winds up and rewinds the wire rope 6A that is attached to the tip fulcrum F of the triangular thigh net 9. 4A is installed on the ship S ₁ like the winch drum 2A, and has a pulley at the tip. A column with block 5A is shown. 2B is a winch drum that is installed on the transfer ship S ₂ and winds up and unwinds the wire rope 6B attached to the fulcrum F of the triangular net 9; 4B is the winch drum 2B
Similarly, it is a prop installed on the transfer ship S ₂ and equipped with a pulley block 5B at the tip. 10 is a support wire for the triangular net 9 that scoops up the catch H from the water;
Reference numeral 11 denotes a winch drum that supports the support column 4B with a wire rope 12.

In the above configuration, after catching the catch H with the purse seine, the purse seine is retracted by the vessel _S1 ,
After collecting the catch H between the main vessel S ₁ and the transfer vessel S ₂ ,
The main ship S ₁ and the transfer ship S ₂ were connected with a rope, and while the distance between the two ships S ₁ and S ₂ was narrowed, the triangular thigh net 9
The operation of scooping up the catch H by the triangular girdle net 9 and dropping the catch H scooped up by the triangular girdle net 9 into the hold of the transfer ship _S2 is repeated.

By the way, in the operation of the above-mentioned triangular tether net 9, first, the triangular tether net 9 is suspended into the water on the side of the transfer ship _S2 while loosening the wire ropes 6A and 6B by the cooperative unwinding operation of the winch drums 2A and 2B. Thereafter, the wire rope 6A is lifted by the cooperative hoisting operation of the winch drums 2A and 2B.
and 6B, scoop up the catch H with the triangular net 9, then further lift the tip fulcrum F of the triangular net 9, and drop the catch H by its own weight into the hold of the transfer vessel _S2. It's about getting into it.

However, the work of hoisting and unwinding the wire ropes 6A and 6B using the winch drums 2A and 2B described above is work at sea, unlike on land, and in particular, when the waves are high, the main ship _S1 and the transfer ship _S2 As the wire rope 6 is repeatedly oscillated by different rolling or pitching, loosening occurs between the pulley blocks 5A, 5B and the winch drums 2A, 2B.
There is a risk that the ropes A and 6B may be wound around the winch drums 2A and 2B in a disorderly manner, or the ropes 6A and 6B may become caught in the disorderly winding portions of the winch drums 2A and 2B, resulting in a reverse winding condition.

[Purpose of the invention]

The present invention has been made as a result of various trial production studies in consideration of the above points, and its purpose is to unwind the rope wound around the winch drum via the pulley block, In a rope winding and rewinding device that rewinds the rope that has been rewound, the rope rewinding operation can always be carried out smoothly. It is an object of the present invention to provide an improved rope hoisting and rewinding device suitable for use in so-called offshore work.

[Summary of the Invention] In order to achieve the above object, the present invention provides a rope winding and unwinding device that unwinds a rope wound around a winch drum via a pulley block, and winds up the unwound rope again. ,
During the rope winding operation in which the rope is wound onto the winch drum, the rope winding speed by the winch drum is set higher than the rope winding speed by the pulley block, and on the other hand, during the rope rewinding operation in which the rope is let out from the winch drum. The present invention is characterized in that it is equipped with a speed control mechanism that makes the rope unwinding speed by the pulley block higher than the rope unwinding speed by the winch drum.

[Embodiments of the invention]

Hereinafter, the present invention will be explained based on an embodiment shown in FIGS. 1 to 5. FIG. 1 is an explanatory diagram of the overall configuration of the rope winding and unwinding device according to the present invention, and FIG. FIG. 3 is a sectional view taken along line B-B in FIG. 2, FIG. 4 is a sectional view taken along line C-C in FIG. 2, and FIG. 5 is an operating system of the device of the present invention. 1 is a hydraulic circuit diagram showing the same parts as in the conventional rope hoisting and rewinding device shown in FIG. A winch drum for hoisting and rewinding, 3 a brake handle for braking the winch 1, 4 a column with a pulley block 5 at its tip and supporting a wire rope 6 at an intermediate position, 7 a wire rope 6 for hoisting a load 8; It shows the hook attached to the tip of the

FIG. 2 is an enlarged longitudinal sectional view of the pulley block 5;
Furthermore, in FIG. 3, which is a sectional view taken along line B-B in FIG. A hydraulic motor 15 for rotational driving is attached.
Further, a substantially gate-shaped roller guide leg 16 is welded to the housing member 13b at an upper inner side thereof, and both leg portions 1 of the gate-shaped roller guide leg 16 are welded to the housing member 13b.
A roller support fitting 17 is arranged with a small gap G between 6a and 16b, and a pair of left and right rope pressure rollers 18a and 18b are located below the roller support fitting 17 and are connected to the groove wheel 14. These rope pressure contact rollers 18a are mounted opposite to each other.
The wire rope 6 is clamped between the groove wheel 14 and the groove wheel 18b. 19a and 19b are screw holes drilled in a connecting member 16c that connects both legs 16a and 16b of the gate-shaped roller guide leg 16, and 20a and 20b are roller pressure adjustment screws that are screwed into the screw holes 19a and 19b, respectively. A bolt, 21 is an open-top rubber plate storage space formed above the roller support fitting 17, and 22 is a rubber plate storage space 2.
The rubber plate housed in 1, 23 indicates a reinforcing plate adhered to the upper surface of the rubber plate 22, and the reinforcing plate 23
By adjusting the threading of the bolts 20a, 20b that contact the
The pressure contact forces of a and 18b are adjusted. The outer periphery of the rope pressure roller 18a (and 18b) described above is formed in an arc shape, as shown in FIG.

Here, the operating system of the device of the present invention will be explained based on FIG. 5. In FIG. 5, 2 is a winch drum that winds a wire rope 6 and winds up and unwinds the rope 6; 7 is a winch drum that winds the wire rope 6; A hook 14 for lifting a load attached to the tip of the wire rope 6 indicates a groove wheel of a pulley block that supports the wire rope 6 at an intermediate position. 24 is a hydraulic motor that rotationally drives the winch drum 2; 15 is a hydraulic motor that rotationally drives the groove wheel 14 of the pulley block; both hydraulic motors 24 and 15 are connected in series.
One end side passage of the hydraulic motor 15 that rotationally drives the groove wheel 14 and the other end side bypass passage (here, the other end side bypass passage of the hydraulic motor 15 refers to the hydraulic motor 15 for driving the groove wheel of the pulley block and the winch drum drive A check valve 25 is connected between the hydraulic motor 24 for driving the hydraulic motor 15 and the other end. A flow rate regulating relief valve 26 is connected in parallel with the check valve 25 between the side bypass passage and the check valve 25 . In the figure, 27 is an oil tank, and 28 is a center bypass type oil switching valve.The apparatus of the present invention shown in the illustrated embodiment operates as follows.

Note that the hydraulic motor 1 makes the rewinding speed of the groove wheel 14 housed in the pulley block 5 faster than the maximum rewinding (feeding) speed of the winch drum 2.
5 and the groove wheel 14 are selected in advance.

Then, when rewinding the wire rope 6, the fifth
When oil flows in the direction of the solid arrow from the oil switching valve indicated by reference numeral 28 in the figure, this oil flows into the hydraulic motor 24 which rotationally drives the winch drum 2, and further into the hydraulic motor 15 which rotationally drives the groove wheel 14 of the pulley block. and returns to the oil tank 27. Also, at this time, a part of the oil that has passed through the winch drum driving hydraulic motor 24 flows through the bypass passage and flows through the flow rate adjustment relief valve 26, which is a one-way valve.
In order to prevent the wire rope 6 from being over-tensioned, the valve 26 is set such that the wire rope rewinding speed of the groove wheel 14 is slightly faster than the wire rope rewinding speed of the winch drum 2. The oil is then adjusted in flow rate and pressure at
The oil flowing out from the groove wheel drive hydraulic motor 15 is combined with the oil and returned to the oil tank 27. Therefore, the present invention is adopted in a ground-mounted rope hoisting and unwinding device to wind the wire rope 6. When the load is returned and the load is lowered, even after the load attached to the end of the wire rope 6 via the hook 7 reaches the ground, the winch drum 2 and the sheave 14 of the pulley block are connected to the winch drum. Speed <
Due to the relationship between groove wheel speed, when the wire rope 6 is unwinded, as in the conventional (ground-mounted) rope hoisting and unwinding device, the rope 6 becomes loose as shown by reference numeral 6' in Fig. 6. This can prevent the wire rope 6 from being randomly wound around the winch drum 2, or the rope 6 being caught in the randomly wound portion of the winch drum 2, resulting in a reverse winding state, and the unwinding operation being reversed. It is possible to prevent the danger of an accident caused by the winding operation.

Furthermore, when the present invention is adopted in a rope hoisting and unwinding device installed on a ship to unwind the wire rope 6 and pull down the load, even if the ship's hull repeatedly oscillates due to rolling or pitching, the winch drum 2 Since the relationship between the winch drum speed and the groove wheel speed is satisfied between the groove wheel 14 of the pulley block and the groove wheel speed, the wire rope 6 is wound randomly around the winch drum 2, as in the case of the above-mentioned ground-mounted rope hoisting and rewinding device. It is possible to prevent the danger of the rope 6 being caught in the winding portion of the winch drum 2, resulting in a reverse winding state, and the unwinding action becoming a winding action and causing an accident. can.

On the other hand, when the wire rope 6 is hoisted, when oil flows in the direction of the dotted arrow in FIG. 14, which is suspended from the hook 7 at the tip of the wire rope 6, has a large load on it, so most of the oil that exits the oil switching valve 28 flows into the check valve 25 side through the bypass passage, and then is a hydraulic motor 24 that rotationally drives the winch drum 2.
The oil flows through the oil tank 27 and returns to the oil tank 27.

On the other hand, as described above, the groove wheel driving hydraulic motor 15 cannot perform active rotational operation because most of the oil exiting the oil switching valve 28 flows into the check valve 25 side through the bypass passage. However, since the groove wheel 14, which is directly connected to the hydraulic motor 15, is drawn to the winch drum 2 via the wire rope 6, the hydraulic motor 15
is actually rotated in the winding direction of the winch drum 2 while generating a pump action, and the oil flowing out from the hydraulic motor 15 is then
The oil flowing out from the check valve 25 is combined and sent to the hydraulic motor 24 for driving the winch drum. Therefore, the present invention is adopted in a rope hoisting and rewinding device installed on the ground or on a ship. When hoisting a load by hoisting a wire rope 6, the relationship between the winch drum 2 and the groove wheel 14 of the pulley block is such that the winch drum speed > groove wheel speed. Similar to the rewind device,
The wire rope 6 is kept taut so that it is wrapped around the winch drum 2 in an orderly manner.

In the illustrated embodiment, as shown in FIG.
An example of a case where a roller support fitting 17 is arranged with a small gap G between both leg portions 16a and 16b of 6, and a pair of left and right rope pressure rollers 18a and 18b are mounted below the roller support fitting 17. However, by providing a plurality of rope pressure rollers facing the groove wheel 14 and holding the wire rope 6 in pressure contact, the pressure of the wire rope 6 against the groove wheel 14 is increased, and the groove wheel 14 is increased during rope winding and unwinding work. The anti-slip effect can be further improved. Moreover, the roller guide leg 16
If the roller support fitting 17 is arranged with a small gap G between the legs 16a and 16b of the roller support fitting 17, and a plurality of rope pressure rollers are attached below the roller support fitting 17, the roller support fitting 17 can be , swings like a seesaw within the above gap G, so that no matter how the wire rope 6 swings due to large rolling or pitching applied to the ship's hull during rope hoisting and unwinding operations at sea, any one of the ropes will The wire rope 6 can be securely clamped between the pressure roller and the grooved wheel 14.

In addition, in the illustrated embodiment, as shown in FIGS. 2 and 3, a rubber plate housing space 21 is located above the roller support fitting 17 and has an open top end.
A rubber plate 22 having a reinforcing plate 23 attached to the upper surface thereof is accommodated in the rubber plate accommodating cavity 21, and bolts 20a that contact the reinforcing plate 23,
The case has been described in which the pressing force of the rope pressing rollers 18a and 18b, which face the groove wheel 14 and clamping the rope wire 6, is adjusted by adjusting the threading of the groove wheel 20b. If the rubber plate 22 is used as the elastic member for adjusting the pressure force of the rollers 18a and 18b, the durability of the roller pressure adjustment means in the ocean can be improved. That is, it is possible to use a spring instead of the rubber plate 22 as a means for adjusting the pressure contact between the rollers 18a and 18b, but a rubber material is more resistant to salt damage than a metal spring material, and the elastic effect can be maintained for a long time. Since it can be maintained for a long period of time, the durability of the roller pressure adjustment means and the rope winding and unwinding device itself can be improved.

Furthermore, in the illustrated embodiment, as shown in FIG. If the outer peripheries of the rollers 18a and 18b are formed in an arc shape, the wire rope 6 comes into line contact with two points of the inclined inner wall of the groove wheel 14, and at the same time
During the rope winding and unwinding operation, the rope pressure contact rollers 18a, 18
The wire rope 6 can be securely clamped between the groove wheel 14 and the groove wheel 14.

FIG. 6 is an explanatory view of the overall configuration showing another embodiment of the device of the present invention, and FIG. 7 is an enlarged vertical cross-sectional view of section A' in FIG. 6. The same reference numerals as those in the first embodiment (FIGS. 1 to 5) indicate the same parts. Therefore, in the first embodiment, as shown in FIG. 1, the pulley block 5 is attached to the tip of the support column 4, but in the second embodiment, as shown in FIG. Insert a pulley block 5 in the middle of the pillar 4 so that
This second embodiment also has the same effects as the first embodiment. can be achieved.

By the way, in the first embodiment, the pulley block 5 is attached to the tip of the support column 4, and in the second embodiment, the case is illustrated in which the pulley block 5 is attached in the middle of the support column 4, but the pulley block 5 is not necessarily used by being attached to the support column 4, but it is used in a horizontally installed type (i.e., groove wheel 14 and rope pressure roller 18).
(a, 18b are arranged horizontally) and may be installed directly on the ship's side, and the rope may be hoisted and rewound by linking with a winch drum.

〔Effect of the invention〕

As described above, according to the present invention, the rope wound around the winch drum is unwound through the pulley block,
In the rope winding and rewinding device for rewinding the unwinded rope, the rope rewinding operation can always be performed smoothly, and in particular, the rope winding and rewinding operation can be performed by installing multiple winches on board the ship. It is possible to obtain an improved rope winding and rewinding device suitable for use in so-called offshore work.

[Brief explanation of the drawing]

1 to 5 show an embodiment of the rope hoisting and unwinding device according to the present invention, FIG. 1 is an explanatory diagram of its overall configuration, and FIG. 2 is a longitudinal section showing an enlarged view of part A in FIG. 1. A top view, Figure 3 is a BB sectional view of Figure 2,
FIG. 4 is a sectional view taken along the line C-C in FIG. 2, FIG. 5 is a hydraulic circuit diagram showing the operating system of the device of the present invention, and FIG. 6 is an explanatory diagram of the overall configuration showing another embodiment of the device of the present invention.
Fig. 7 is a vertical cross-sectional view showing an enlarged view of section A' in Fig. 6;
Figure 8 is an explanatory diagram of the overall operating system when carrying out cargo handling work using a conventional (ground-based) rope hoisting and rewinding device, and Figure 9 is a diagram of the same conventional (ship-mounted) rope hoisting and rewinding device. FIG. 2 is an explanatory diagram of the overall operating system when the catch of a purse seiner (main vessel) is loaded onto another purse seine vessel (transfer vessel). 2... Winch drum, 4... Support, 5... Pulley block, 6... Wire rope, 13a and 13b... Housing member, 14... Channel wheel, 1
5...Hydraulic motor, 16...Roller guide leg, 16
a and 16b... leg portion, 16c... connection member,
17...Roller support fittings, 18a and 18b...
...Rope pressure roller, 19a and 19b...Screw hole, 20a and 20b...Roller pressure adjustment bolt, 21...Rubber plate housing space, 22...Rubber plate, 23...Reinforcement plate, 24...Hydraulic motor , 25... Check valve, 26... Valve with flow rate adjustment relief, 27... Oil tank, 28...
Oil switching valve, 29 and 30...pulley block, G
……gap.

Claims (1)

[Scope of Claims] 1. In a rope winding and unwinding device that unwinds a rope wound around a winch drum via a pulley block and then winds up the unwound rope again, the rope is wound around the winch drum. During the rope winding operation, the rope winding speed by the winch drum is higher than the rope winding speed by the pulley block, and on the other hand, during the rope rewinding operation in which the rope is let out from the winch drum, the rope winding speed by the winch drum is set to be higher than the rope winding speed by the pulley block. A rope winding and rewinding device comprising a speed control mechanism that makes the rope rewinding speed by a pulley block higher than the unwinding speed. 2 In the invention described in claim 1,
The pulley block used in combination with the winch drum has a groove facing the pulley block,
A rope winding and rewinding device equipped with multiple rope pressure rollers that press the rope in the direction of the groove wheel. 3 In the invention described in claim 2,
A plurality of rope pressure rollers provided opposite to the grooved wheel of the pulley block are attached to a common roller support fitting, and the roller support fitting is connected to the pulley block member to which the support fitting is attached. A rope hoisting and rewinding device that allows for free swinging with a small gap between the rope and the rope. 4 In the invention set forth in claim 2 or 3, the rope pressing roller provided opposite to the grooved wheel of the pulley block is a rope winding roller using a rubber plate as an elastic member for adjusting the pressing force. Rewind device. 5. A rope winding and rewinding device according to any one of claims 2 to 4, in which the outer periphery of the rope pressure roller provided opposite to the grooved wheel of the pulley block is formed into an arc shape.