JPH0243458B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a purse seine fishing machine.

[Technical background]

In purse seine fishing in Japan, the size of the net is large compared to the size of the vessel, so when the net is narrowed down during purse seine operation as shown in Figure 7a, the result is as shown in Figure 7b. The boat will be inside the net that has been turned, and if the net is lifted from the side of the boat as shown in Figure 7c, the net will get caught in the net, the bottom of the ship, or the propulsion device, so the net lifting device should be installed at the stern. It is essential that If the net lifting machine is fixed at a position suitable for lifting nets at the stern of the boat, it will get in the way when casting the net.
It is necessary to move the stern horizontally between port and starboard. Additionally, as the netting progresses, the angle of incidence of the float, where the most tension is applied, on the netting machine usually changes by more than 90 degrees, as shown in Figure 8. For this purpose, it is essential for the net lifting machine to have a turning function, and even when the net lifting machine is housed on the side opposite to the working side during net casting, it is possible to turn the net lifting machine so as to shorten the length occupied between the port and starboard sides. desirable.

Once the net has been hoisted by the net hauler, the side hoisting of the fish net is carried out using the side hauler. However, it takes a lot of human power to load the net onto the side hauler, and it is easy to lift the fish net from the side. It is desired to be able to transition to frying.

In addition, in purse seine nets are added to the float net and the sinker net to create a net that surrounds a school of fish, but when fishing for schools of fish attached to the seabed or schools of fish in deep water, a large number of constrictors are used. It is necessary to increase the hem depth of the net, and when lifting the net, the float net and sinker net are shorter than the fishnet, so it is necessary to slip them appropriately and raise the fishnet with the floater net and sinker net aligned. .

[Conventional technology and its issues]

The following methods are used to raise nets in purse seine fishing.

(a) First, as seen in Japanese Patent Publication No. 50-33956 and Japanese Patent Publication No. 59-12250, a plurality of drive rollers are cantilever supported on a common support end member, and adjacent drive rollers are A device has been proposed in which the rotational directions of the rollers are opposite to each other and the fishing net is guided in a meandering manner between these driving rollers to haul the net. However, since this type of device does not have horizontal movement and turning functions, it cannot be installed at the stern and must be installed midway along the side of the ship, making it unsuitable for Japan's purse-net fishing method. It is something. As mentioned in the technical background above, the net size of Japan's purse seine fisheries is large compared to the vessel size. Therefore, as the hoisting process progresses, the boat is pulled inside the net. This means that
When the net is lifted, the net is caught on the bottom of the ship or the propulsion machine.In addition, installing such a net lifting machine midway on the side is limited by the length of the side hauler, which reduces the efficiency of net lifting work. is significantly inhibited. Furthermore, since the structure does not allow rotation, the angle of the net lifting machine is fixed, making it impossible to perform operations corresponding to the net lifting load.

(b) As shown in Fig. 9, net hauler-based net hoisting means has a large slip rate when hoisting the net.
Small tears in the net fabric tend to occur, and it is not possible to adjust the net lifting speed between the float and the body net. For this reason, there are problems such as the need for manual stepping.

(c) Since the net lifting means shown in Figure 10 lifts the net by sandwiching the net fabric, it is not only impossible to adjust the lifting speed of the fish net, float net, and sinker net, but also when the net volume becomes large, the net is lifted. The force is not transmitted to the net material and the speed of lifting the net decreases. In addition, the net fabric is often twisted during hoisting.

(d) With the net lifting means shown in Figure 11, in order to improve the net lifting force, it is necessary to lift the machine with a powerful boom, which raises the center of gravity of the ship and raises the net lifting force. There is a serious problem that the point of application of force is at a high place, the hull tends to tilt, and operation in rough weather is dangerous. In addition, there are problems in that the net lifting force on the float side is insufficient and the net lifting speed between the float, the body net, and the sinker cannot be adjusted. The purpose of the present invention was to solve the problems of the prior art by simple and rational means, and to make it possible to adjust the net lifting speed between the float side and the sink side. To provide a net lifting machine capable of preventing small tears in the net fabric by applying uniform tension to the net fabric and uniformly hoisting the net fabric.

[Means to solve the problem]

The structure of the present invention that solves the problems of the prior art is such that a plurality of net lifting drive rollers each having a length larger than a diameter are mounted in parallel on a common supporting end member at one end thereof, and the driving rollers adjacent to each other are mounted on a common supporting end member. In a net lifting machine in which the rollers are rotationally driven in the opposite direction, a guide roller having a smaller diameter than the driving roller,
The net is attached to the upper side of the drive roller, parallel to the drive roller, and freely rotatable to the support end member that is common to the drive roller, and the net contact surface that is the upper surface of the support end member is connected to each of the rollers. It is characterized in that it is arranged perpendicular to the central axis of the net, and that the net lifting direction line along the net contact surface is configured such that the upper side A of the net lifting net is inclined downward with respect to the horizontal plane. be.

〔Example〕

1 to 6 show embodiments of the invention.

Figure 1 is a front view of the net lifting machine itself, Figure 2 is a side view of the same as above, Figure 3 is a plan view of the rotating mechanism, Figures 4 to 6.
The figure is an explanatory diagram of the state of the net.

Reference numeral 1 denotes a guide rail laid on the stern plate of the hull 2 in a direction perpendicular to the longitudinal axis of the hull 2. A mount 3 is mounted on the guide rail 1 so as to be horizontally movable. ing. A protrusion 4 is provided on the lower surface of the pedestal 3, into which a screw 5 installed parallel to the guide rail 1 is screwed, and by forward and reverse rotation of the screw 5, the pedestal 3 is attached to the guide rail 1. It is constructed so that it can be moved back and forth.

On the pedestal 3, a swivel 6 is rotatably mounted to fit into a shaft tube (not shown) provided on the pedestal 3. And inside this swivel base 6, there is a third
A worm wheel 7 as shown in the figure is provided, and a worm gear 8 mounted on the upper side of the mount 3 is meshed with the worm wheel 7. A swing hydraulic motor 9 connected to the worm gear 8 causes the worm wheel 7 to become a worm gear. 8, and the swivel base 6 can further rotate.

10 is a supporting end member having a rectangular or elliptical planar shape and having a hollow structure inside;
One long side of the support end member 10, specifically, the lower part of the long side of the stern edge when the support end member 10 is in the state shown in FIG. support

As is clear from FIG. 2, the support end member 10 has an upper side A of the net that is rotated downward with respect to the horizontal plane along a net lifting direction line that is along the net contact surface 10a that is the upper surface of the support end member 10. It is installed on stand 6. A cylinder 12 is interposed between the lower surface of the other long side of the support end member 10 and the pedestal 3, and the cylinder 12 allows the support end member 10 to move around the pivot structure 11 as a fulcrum. It is constructed so that it can be tilted.

Reference numerals 13 and 14 refer to drive rollers for net hoisting, which are disposed at right angles to the net contacting surface 10a, which is the upper surface of the support end member 10, and along the net hoisting direction of the net; 15, a supporting roller; A guide roller for a freely rotating dip net 16 that is vertically installed on the upper side of the end member 10, and both rollers 13, 14, and 15 are each supported by the support end member 10 in a cantilevered structure. . The driving rollers 13 and 14 are friction promoting means for mainly hoisting the fish net portion, specifically roller portions 13a and 14a having a friction layer made of rubber or the like and a large number of locking grooves 18 on their surfaces. , the roller portions 13b and 14b do not have friction promoting means. Furthermore, the drive rollers 13 and 14 are configured to have a length greater than their diameter.

In this embodiment, a portion without a friction promoting means is provided, but the entire surface of the drive rollers 9 and 10 is made of a rubber layer with a hardness that provides an appropriate friction promoting means. Float nets and sink nets, which are subject to a large amount of tension during netting, may be made to slip more easily.

Further, the lower portions of the drive rollers 13 and 14 are fixed to a pair of gears (not shown) housed in the cavity of the support end member 10 by fitting knobs provided on the lower surface of the support end member 10. A gear (not shown) rotated by a hydraulic motor 19 meshes with one of the gears, and the drive roller 13,
14 are rotated in opposite directions, that is, in the direction of the arrow in FIG. The collar members 20 and 21, which prevent the float net 22 and the fish net from slipping upward during net-lifting operations, have a fixed structure and do not rotate together with the drive rollers 13 and 14.

Further, the guide roller 15 guides the dip net 16 and supplies it to the drive rollers 13 and 14, and is configured to have a smaller diameter than the drive rollers 13 and 14.

In the figure, reference numeral 23 denotes a valve box for operating the hydraulic motors 9, 10 and the cylinder 12.
A plurality of valves (not shown) which are switched and operated by an operating lever 24 are housed in the valve 3 . Further, illustrations of the hydraulic motors 9, 10 and the hydraulic conduit connecting the cylinder 12 and the valve are omitted.

[Explanation of action]

Next, the operation will be explained based on the above embodiment. Figure 4 shows a purse seine operation in a very normal state, and Figure 5 shows an extreme example of a purse seine operation when the ocean conditions are good, there is little net resistance, and the catch is small. , Figure 6 shows a purse seine operation when the catch is large or the net load is large during rough weather.

FIG. 4 shows that the float net 22, the fish net 26, and the dip net 16 from which the ring has been removed are taken in from between the drive roller 13 and the guide roller 17, and the drive roller 13,
14 in an S-shape to move the hoisted net from the upper side A of the support end member 10 to the lower side B of the hoisted net. Do the net. As shown in FIG. 8, the swivel table 6 is rotated via the hydraulic motor 9 in order to adapt to the change in the angle of incidence on the float, and the float net increases the friction between the drive rollers 13 and 14. The cylinder 12 is arranged so as to fit the roller parts 13b, 14b which do not have a means, and to fit the roller parts 13a, 14a which have a friction promoting means.
by operating the support end member, that is, the drive roller 13,
14 to adjust the lifting speed of the float net, the fish net, and the sink net, thereby achieving consistent lifting of the net.

In FIG. 5, the contact areas of the float net, the fish net, and the dip net with the drive rollers 13 and 14 are controlled to be small, and in FIG. 6, on the contrary, the contact areas are adjusted to be large. In addition, in the case of casting nets, this net lifting machine is not necessary, and placing it in the position shown in Figure 4 will get in the way when casting the net, so the fine net lifting machine is moved horizontally on the guide rail 1, and the net lifting machine is moved horizontally on the guide rail 1. It is necessary to fix the net lifter in position A as shown in FIG.

[Effects of the Invention] As described above, according to the configuration of the present invention, the following effects can be obtained.

(a) Since the upper side of the net-lifting net contact surface, which is the upper surface of the support end member, is inclined downward, the net-lifting direction line of the support end member can be adapted to the direction of the net sorting device, making it smooth and smooth. It is possible to reliably haul nets continuously.

(b) Support end members, specifically, because the drive roller is tiltable, float nets of different lengths,
By adjusting the lifting speed of the fish net and sedimer net, it is possible to create a balanced net that is adapted to the length.

[Brief explanation of drawings]

Fig. 1 is a front view of the net lifting machine of the present invention, Fig. 2 is a side view of the same as above, Fig. 3 is a plan view of the rotating mechanism of the rotating table, Figs. 4 to 6 are explanatory diagrams of the operating state of the net lifting machine, Figures 7a, b, and c are flow explanatory diagrams from the start of hoisting to the latter half of the net lifting state, Figure 8 is an explanatory diagram showing changes in the angle of incidence on the float, and Figures 9 to 11 are current diagrams. This is a commonly used purse net fishing machine. DESCRIPTION OF SYMBOLS 1... Guide rail, 2... Hull, 3... Frame, 4... Projection, 5... Screw rod, 6... Swivel base, 7... Worm wheel, 8... Worm gear, 9... Hydraulic motor, 10...
Support end member, 10a... Net contact surface, 11... Pivotal support structure, 12... Cylinder, 13, 14... Drive roller,
13a, 14a...Roller portion with friction promoting means,
13b, 14b... Roller portion without friction promoting means, 15... Guide roller, 16... Sediment net, 18... Locking groove, 19... Hydraulic motor, 20, 21... Flange member,
22...Float net, 23...Valve box, 24...Operation lever,
25... Net slicing machine, 26... Fish net.

Claims (1)

[Scope of Claims] 1 A plurality of drive rollers for lifting nets having a length larger than a diameter are mounted in parallel on a common supporting end member at one end thereof, and the drive rollers adjacent to each other rotate in opposite directions. In the net lifting machine configured to be driven, a guide roller having a smaller diameter than the driving roller is provided on the upper side of the driving roller, parallel to the driving roller, and on the supporting end member common to the driving roller. The net contacting surface, which is the upper surface of the support end member, is arranged to be perpendicular to the central axis of each roller, and the net lifting direction line along this net contacting surface is relative to the horizontal plane. , A net lifting machine for purse seine fishing, characterized in that the upper side A of the lifting net is configured to be inclined downward. 2 The angle of inclination of the mesh contact surface, which is the upper surface of the support end member, is
A purse seine fishing net lifting machine according to claim 1, which is configured to be able to change the angle over a range of 20 degrees or more.