JPH0155182B2 - - Google Patents

Description

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

[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 purse seine operation is carried out to tighten the hem of the net as shown in Figure 9 a, the result is as shown in Figure 9 b. The boat will be inside the turned net, and if the net is lifted from the side of the boat as shown in Figure 9c, the net and the bottom of the boat will get caught in the propulsion device, so the net lifting device should be installed at the stern. is essential. If the net lifting machine is fixed and installed at the stern in a position suitable for lifting the net, it will get in the way when casting the net, so when casting the net, it should be installed horizontally between the port and starboard sides of the stern so that it can be stored on the side opposite to the working port. need to be moved. Also, as the net hoist progresses, the angle of incidence on the float, where the tension is most applied, to the net hoist is as shown in Figure 7.
Normally, the angle changes by more than 90 degrees, so in order to always raise nets under the same conditions, it is essential for the net hauler to have a swivel function. It is desirable to rotate the net hauler so as to shorten the length occupied by the net.

Once the net has been hoisted by the net-lifting machine, 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, a constriction is placed in the float net and sink net for the body net to create a net that surrounds a school of fish. It is necessary to increase the depth of the hem of the net, and when lifting the net, since the float net and sink net are shorter than the fish net, it is necessary to slip them appropriately and raise the fish net, float net, and sink net in alignment. be.

[Conventional technology]

Pursenet fishing methods include the following:

(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 size of Japan's purse seine fisheries is large compared to the size of the vessels. Therefore, as the hoisting process progresses, the boat is pulled inside the net. This puts the net in a position where it 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 rollers. The efficiency of net lifting work is significantly hindered. Furthermore, since the structure does not allow rotation, the net lifting angle is fixed, making it impossible to perform operations corresponding to the net lifting load.

(b) Net hoisting means using a net hauler as shown in Fig. 11 has a high slip rate and tends to cause small tears in the net during hoisting, and the speed of hoisting between the float and the fish net is high. cannot be adjusted. For this reason, there are problems such as the need for manual stepping.

(c) Since the net lifting means shown in Figure 12 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.

(d) With the net lifting means shown in Figure 13, 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 vessel and increases the net lifting force. The point of action is at a high place, and the hull is prone to list, which poses serious problems that make operation in rough weather dangerous. Further, there are problems such as the net lifting force on the float side being insufficient and the speed of lifting the net between the float, the body net, and the sinker cannot be adjusted.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and it solves the problems of the prior art by simple and rational means, and sets the net lifting direction on the float side of the purse seine to the closest point with respect to the net lifting direction line. In addition to adjusting and maintaining the angle in a good condition, it is possible to adjust the net lifting speed between the float side and the sink side, prevent small tears in the net fabric by applying uniform tension to the net fabric, and enable uniform lifting of the net fabric. Our goal is to provide a net-lifting machine.

[Structure of the invention]

The configuration of the present invention that solves the problems of the prior art is as follows:
A plurality of drive rollers for hoisting nets each having a length larger than a diameter are mounted in parallel and on a common supporting end member at one end, and the drive rollers adjacent to each other are driven to rotate in opposite directions. In the net lifting machine, a guide roller is provided on the upper side of the drive roller, in parallel with the drive roller, and in a support end member common to the drive roller, so as to be freely rotatable. The mesh contacting surface configured to be configured to be commonly orthogonal to the central axis of each of the rollers, and the axis of the rotating shaft for raising and lowering the supporting end member is parallel to the mesh contacting surface of the supporting end member. The configuration conditions include the axis of the rotating shaft, the respective center axes of the first and second drive rollers from the upper side of the net lifting roller, and the net contact surface of the support end member. Due to the configuration condition that the net lifting direction connecting the two intersections with the plane is not parallel, the upper side of the supporting end member for lifting the net is inclined downward.

[Embodiment] (Figs. 1 to 3) Figs. 1 to 3 show a first embodiment of the present invention. FIG. 1 is a front view of the net lifting machine itself, and FIGS. 2 and 3 are plan views, respectively.

Reference numeral 1 denotes a guide rail laid on the stern deck of the hull 2 in a direction perpendicular to the longitudinal axis of the hull 2, and a mount 3 is mounted on the guide rail 1 so as to be horizontally movable. There is. A protrusion 4 is provided on the lower surface of this pedestal 3, and a screw rod 5 installed parallel to the guide rail 1 is screwed into this.By forward and reverse rotation of this screw 5, the pedestal 3 is moved to the guide rail. It is configured to be able to reciprocate along 1.

On the pedestal 3, a swivel 6 is rotatably mounted to fit into a shaft tube (not shown) provided on the pedestal 3. Although not particularly shown, a worm wheel is provided inside the swivel base 6, and a worm gear mounted on the upper side of the pedestal 3 is meshed with the worm wheel. The worm wheel is rotated by the hydraulic motor 7 via a worm gear, and the swivel base 6 can also be rotated.

As is clear from FIGS. 2 and 3, 8 is a supporting end member having an elongated oval shape in plan view and having a hollow structure inside, and a mesh contact surface 8a is formed on the upper surface of the supporting end member 8. has been done. And this mesh contact surface 8
perpendicular to a and the net lifting direction line a-a of the net
As shown in FIG. - configured to match a.

That is, the net hoisting direction line a-a extends from the center axis of the first drive roller 9 and the second drive roller 10 from the upper side of the net hoist, respectively, and the support end member. It is set by connecting two intersections with a plane including the mesh contact surface 8a of No. 8. Further, a guide roller 11 disposed on the upper side A of the support end member 8 for lifting the net is vertically disposed on the net contacting surface 8a so as to freely rotate. The guide roller 11 serves to guide the seine net 12 of the purse seine fishing gear. Further, the drive rollers 9 and 10 for the double lifting net are configured to have a length larger than a diameter.

Further, the driving rollers 9 and 10 are friction promoting means for mainly hoisting the fish net portion, in detail,
The roller parts 9a and 10a have a friction layer made of rubber or the like and a large number of locking grooves 13 formed on their surfaces, and roller upper parts 9b and 10b have no friction promoting means.

That is, the float net is shorter than the body net because the body net constituting the purse seine is sufficiently constricted to create a net that surrounds the school of fish. For this reason, it is necessary to delay lifting of the float net by the difference between the length of the fish net and the float net. For this reason, as mentioned above, the float net is connected to the roller upper part 9b which does not have a friction promoting means.
Guide it to 10b, slip it in this part, and balance it with lifting of the fishnet. In addition, as a method without a friction promoting means, use a metal surface with low friction,
Alternatively, a slip ring (not shown) that rotates freely relative to the drive roller may be fitted.

In addition, 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 having a hardness that becomes an appropriate friction promoting means, and the condensation causes a higher lift than the net fabric. Float nets and sink nets, which are subject to a large amount of tension when netting, may be made easier to slip.

Further, the lower portions of the drive rollers 9 and 10 are fitted and fixed to a pair of gears (not shown) housed in the cavity of the support end member 8.
A gear (not shown) rotated by a hydraulic motor 14 provided on the lower surface of the gear meshes with one of the gears, and the drive rollers 9 and 10 are moved in opposite directions, i.e., in the second and second gears. It is designed to be rotationally driven in the direction of the arrow in Figure 3.

Reference numerals 15 and 16 denote collar members that prevent the float net 17 and the fish net from slipping upward during net-lifting operations. These collar members 15 and 16 have a fixed structure and are the same as the drive rollers 9 and 10. It does not rotate.

Further, the guide roller 11 guides the dip net 12 and supplies it to the drive rollers 9 and 10, and is configured to have a smaller diameter than the drive rollers 9 and 10.

Next, the most important technical matters in the present invention will be explained.

(a) Reference numeral 18 denotes a rotating shaft that supports the supporting end member 8 on the swivel base 6 so that it can be raised and lowered.As is particularly clear from FIGS.
A configuration condition in which the central axis line bb of this rotating shaft 18 is not parallel to the net lifting direction line a-a, and both lines a-a and bb form an angle of, for example, about 45 degrees when viewed from a projection perspective. (b) As is clear from FIG. 1, the center axis bb of the rotating shaft 18 and the mesh contact surface 8a of the support end member 8
(c) When the above conditions a and b are satisfied, the upper side A of the support end member 8 is inclined downward; This is how it was done. The tilting means of the support end member 8, specifically, the mesh contacting surface 8a, is perpendicular to the central axis b-b of the rotating shaft 18, and on a line passing through the center of the rotating shaft 18, and Lower part of stand 6 and support end member 8
This is done by the expansion and contraction action of the groove 19 provided between the lower surface of the .

In the figure, 20 is a valve box for operating the hydraulic motors 7, 14 and the cylinder 19.
A plurality of valves (not shown) which are switched and operated by an operating lever 21 are housed within the valve 0 . Further, the hydraulic pipes connecting the hydraulic motors 7, 14 and the cylinder 19 to the valves are omitted from illustration because conventionally known means are sufficient.

[Effect]

Next, the operation of the first embodiment will be explained with reference to FIGS. 6 to 8. FIG. 6 shows purse seine operation in a very normal state, FIG. 7 shows a case where the float net 17 is in a substantially straight line with the sinker net 12, and FIG. 8 shows only the float net 17. This figure shows the purse seine operation when the net is close to the seine net 12 side.

Figures 6 to 8 show the float net 17, the body net 22, and the sinker net 12, which has been removed from the ring, placed on the driving roller 9.
The support end member 8
The net is transferred from the upper side A of the net to the lower side B of the net, and after exiting the drive roller 10, it is guided to the net handler 23 to smoothly lift the net. The angle θ (approximately 45° in this figure) formed between the net lifting direction line a-a and the net lifting direction of the float net 12, that is, the angle θ (approximately 45° in this figure), that is, the angle θ is Swivel base 6
The upper part 9 of the roller 9 does not have a friction promoting means for driving the rollers 9 and 10.
The cylinder 19 is operated to adjust the inclination of the support end members 8, that is, the drive rollers 9 and 10, so as to fit the roller portions 9a and 10a having friction promoting means, and the float net 17 , the lifting speeds of the fish net 22 and the dip net 12 are adjusted to ensure uniform lifting of the net. Also, ocean conditions,
The pivoting and tilting of the supporting end member 8 are adjusted according to the amount of fish entering. In addition, in the case of casting nets, this net lifting machine is not necessary, and placing it in the position shown in Figure 6 will get in the way when casting the net, so the 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.

[Embodiment] (Figures 4 and 5) A second embodiment of the present invention will be described with reference to Figures 4 and 5. FIG. 4 shows a front view of the net lifting machine, and FIG. 5 shows a plan view of the same.

In this second embodiment, the rotating shaft 18 is mounted on the swivel base 6 in a state in which the rotating shaft 18 is parallel to the net contacting surface 8a of the supporting end member 8 and is inclined so that the upper side A of the lifting net is downward. Other configuration requirements are:
Since this is the same as the first embodiment described above, detailed explanation will be omitted. However, the same configuration requirements as the first embodiment are as follows.
They are indicated using the same symbols. The operation of this second embodiment is the same as that of the first embodiment, so detailed description will be omitted.

〔Effect of the invention〕

As described above, the present invention has the following effects.

(a) Since the upper side of the supporting end member is tilted downward, the net lifting direction line of the supporting end member can be adapted to the direction of the net sorting device, and smooth and reliable net lifting can be achieved continuously. You can do it.

(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.

(c) The supporting end member is rotated by the net lifting machine with respect to the fish net to be lifted, so that the smoothness of the net lifting machine and the lifting net commensurate with the net lifting load can be achieved.

(d) Since the support end member equipped with drive rollers and guide rollers can be rotated, when the net has been lifted and the side hauler is used to lift the net from the side, the upper side of the net can be rotated toward the bow side. You can automatically place the net fabric on the side holer by simply
The manual work of passing the mesh around the side hauler is greatly reduced.

(e) Since the net lifting machine is located at the stern, it is possible to lay a long side hauler, and a large amount of net is caught on the side hauler, improving the efficiency of side hoisting.

[Brief explanation of drawings]

FIG. 1 is a front view of a net lifting machine according to the present invention, FIGS. 2 and 3 are a plan view of the same as above, FIG. Figures 6 to 8
Figure 9 is an explanatory diagram of the net lifting operation state, Figure 9 a, b, and c are flow diagrams from the start of hoisting to the latter half of the net lifting state, and Figure 10 is an explanatory diagram showing changes in the angle of incidence on the float. , FIG. 11 to FIG. 13 show a purse seine fishing net hauler currently in common use. 1... Guide rail, 2... Hull, 3... Frame,
4... protrusion, 5... screw rod, 6... swivel base, 7...
Hydraulic motor, 8... Support end member, 8a... Net contact surface, 9, 10... Drive roller, 9a, 10a...
Roller parts with friction promoting means, 9b, 10b...
Upper part of roller without friction promoting means, 11... Guide roller, 12... Sediment net, 13... Locking groove, 1
4... Hydraulic motor, 15, 16... Flange member, 17
... Float net, 18 ... Rotating shaft, 19 ... Cylinder, 20 ... Valve box, 21 ... Operation lever, 22 ...
...Mine net, 23...Net removal machine.

Claims (1)

[Scope of Claims] 1 (a) A plurality of net lifting drive rollers each having a length larger than a diameter are mounted parallel to each other and each end is pivoted on a common supporting end member, and the above-mentioned In a net lifting machine in which the drive roller is rotationally driven in the opposite direction, (b) a free net is attached on the upper side of the drive roller, parallel to the drive roller, and on a support end member common to the drive roller; A rotatable guide roller is provided, and the net contact surface formed on the support end member is configured to be commonly orthogonal to the central axis of each roller, (c) a rotation axis for raising and lowering the support end member axis and
The configuration condition that the supporting end member is parallel to the net contacting surface, the axis of the rotating shaft, and each of the first driving roller and the second driving roller from the upper side of the net lifting roller among the driving rollers. The upper side of the supporting end member is configured such that the net lifting direction connecting the two intersection points of the central axis and the plane including the net contact surface of the supporting end member is not parallel to each other, and the upper side of the supporting end member is inclined downward. A net lifting machine for purse seine fishing. 2. The net lifting machine for purse seine fishing according to claim 1, wherein the rotation axis is parallel to and horizontal to the net contacting surface of the support end member. 3. A net hauling machine for purse seine fishing according to claim 1, characterized in that the rotating shaft is parallel to the net contacting surface of the support end member and is inclined so that the upper side of the net is directed downward. .