JPH0251575B2 - - 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 Japan's purse seine fishing industry, the mesh membrane is large relative 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 8 b, If the net is lifted from the side of the ship as shown in Figure 8c, the net will get caught on the bottom of the ship or the propulsion machine, so the net lifting machine should be installed at the stern of the ship. It is essential to do so.
If the net lifting machine is fixed and installed in the stern at 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 portboard. need to be moved. In addition, as the net hoist progresses, the angle of incidence of the float on the net hoist, which is subject to tension, is as shown in Figure 9.
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 hauler, the side hoisting of the fish net is carried out using the side hauler, but it takes a lot of manpower to load the net onto the side hauler, and it is easy to lift the net to the side. It is desired to be able to transition to frying.

In addition, in purse seine, the net is made by adding knots to the floaters and dippers to surround the school of fish, but when fishing for schools of fish attached to the seabed or schools of fish in deep water, a lot of knots are added to the bottom of the net. It is necessary to increase the depth, and when lifting the net, the floats and sinkers are shorter than the body net, so it is necessary to slip the net as appropriate and lift the fish net with the floats and sinkers aligned.

[Conventional technology]

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 the net lifting operation. Significantly inhibited.
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. 10 has a high slip rate and tends to cause small tears in the net fabric when hoisting the net, and the speed of hoisting the net 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 11 lifts the net by sandwiching the net fabric, not only is it not possible to adjust the speed of lifting the fish net, floats, and sinkers, but when the net volume increases, the net lifting force increases. It is not transmitted to the net fabric 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 12, 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 increases the net lifting force. The point of application of the force is at a high place, making the ship's hull prone to list, which poses serious problems that make operation in rough weather dangerous. In addition, there are problems in that the net lifting force on the float side is insufficient, and the speed of lifting the net between the float, the fish net, and the sinker cannot be adjusted.

As a means to solve these problems, the applicant has filed Japanese Patent Application No. 107008/1983
251831), we proposed the following seine net lifting machine for purse seine fishing. This net lifting machine is the 13th
As shown in the figure and FIG.
each having one end mounted on a common support end member 3,
In a net lifting machine in which the driving rollers 1 and 2 adjacent to each other are driven to rotate in opposite directions, a first guide roller 4 having a diameter smaller than that of the driving rollers 1 and 2 is moved from the driving roller 1 to lifting the net. On the upper side,
Parallel to this drive roller 1, it is freely rotatably attached to the support end member 3 which is common to the drive roller, and the mesh contact surface 3a of the support end member 3 is common to the rotational axis of each of the rollers 1 and 2. The net lifting mechanism is arranged so as to be orthogonal to the net lifting mechanism, and the net lifting direction line along the net contact surface 3a is configured such that the upper side A of the net lifting net is inclined downward with respect to the horizontal plane, and the net lifting mechanism is rotatably supported. A pedestal 6 supported by a swivel base 5 is arranged so as to be horizontally movable between the port and starboard sides of the stern.

However, this net lifting machine also has the following problems. That is, as shown in Fig. 14, when a large force is applied to the net fabric to be hoisted, in order to prevent the fabric from slipping, the winding angle of the fabric around the drive rollers 1 and 2 is set to be large. When the upper side of the net lifting machine is turned toward the bow direction, the net fabric gets entangled with the last drive roller 2. Specifically, in the figure, the net parts A and B get close to each other, and the part B becomes the final one. th drive roller 2
Continuous hoisting work may be interrupted, or
Or, a net breakage accident occurs.

[Purpose of the invention]

The present invention was developed in view of the above circumstances, and it solves the problems of the conventional technology by simple and rational means, and allows adjustment of the speed of lifting the net between the float and sink sides, and provides uniform net coverage. To provide a net lifting machine capable of preventing small tears in the net fabric by applying a certain tension and uniformly hoisting the net fabric.

[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 having a length larger than a diameter are mounted in parallel on a common support end member at one end thereof, and the drive rollers adjacent to each other are driven to rotate in opposite directions. In the net machine,
A first guide roller having a smaller diameter than the drive roller is mounted on the upper side of the drive roller, parallel to the drive roller, and rotatably attached to the support end member common to the drive roller. The net contacting surface of the support end member is disposed so as to be common and orthogonal to the rotational axis of each of the rollers, and the net lifting direction line along this net contacting surface is with respect to a horizontal plane, with the upper side A of the net lifting net facing downward. It is configured to be inclined, and furthermore, two intersection points of the respective center axes of the first drive roller and the last drive roller from the upper side of the net lifting member and a plane including the net contact surface of the support end member are formed. At any point on the lower side of the net hoisting line than the connecting straight line and the straight line orthogonal to both straight lines of the central axis of the first drive roller, the axis or its extension line includes the net contacting surface of the support end member. A second guide roller is provided so as to intersect with the plane and is freely rotatable and has approximately the same length as or longer than the drive roller, and is supported on a swivel base that rotatably supports the net lifting mechanism. A feature of this ship is that the pedestal supporting the pedestal is horizontally movable between the port and starboard sides of the stern.

[Example] Figures 1 to 7 show examples of the present 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, Figure 4 is a plan view of the supporting end member, and Figures 5 to 7 are It is an explanatory diagram of a network state.

11 is located on the stern deck of the hull 12.
A guide rail 13 is installed in a direction perpendicular to the longitudinal axis of 2.
is mounted so that it can move horizontally. This frame 13
A protrusion 14 is provided on the lower surface, into which a screw rod 15 installed parallel to the guide rail 11 is screwed, and by forward and reverse rotation of the screw rod 15, the pedestal 13 reciprocates along the guide rail 11. It is designed to be moved.

A swivel base 16 is rotatably mounted on the pedestal 13 and is structured to fit into a shaft tube (not shown) provided thereon. And inside this swivel base 16,
A worm wheel 17 as shown in FIG. 3 is provided, and a worm gear 18 mounted on the upper side of the pedestal 13 is meshed with the worm wheel 17. is rotated via a worm gear 18, and the swivel base 16 is also rotatable.

Reference numeral 20 denotes a supporting end member having a rectangular or elliptical planar shape and a hollow structure inside, and one long side of the supporting end member 20, specifically, the supporting end member 20 The lower part of the long side of the stern edge in the state shown in the figure is cantilever-supported on the upper end of the swivel base 16.

As is clear from FIG. 2, the support end member 20 is placed on the swivel base 16 so that the net lifting direction line along the net contact surface 20a of the support end member 20 is directed downward with respect to the horizontal plane. It is provided. The lower surface of the other long side of the support end member 20 and the pedestal 13
A cylinder 22 is interposed between the support end member 20 and the support end member 20, and the support end member 20 is configured to be tiltable using the shaft support structure 21 as a fulcrum.

Reference numerals 23 and 24 denote driving rollers for net hoisting, which are disposed perpendicularly to the net contacting surface 20a of the supporting end member 20 and along the net hoisting direction line of the net; This is the first guide roller of a freely rotating dipstick rope 26 which is vertically disposed on the upper side of the net hauling net, and both rollers 23, 24, 25 are supported by the support end member 20 in a cantilevered manner. The drive rollers 23 and 24 are friction promoting means for mainly controlling the body part, specifically, the roller part 23 has a friction layer made of rubber or the like and a large number of locking grooves 18 on its surface.
a, 24a, and roller portions 23b, 24b having no friction promoting means. Further, the driving rollers 23 and 24 are configured to have a length larger than a diameter.

Further, the lower portions of the drive rollers 23 and 24 are fixedly fitted to a pair of gears (not shown) housed in the cavity of the support end member 20, and are fixed to a pair of gears (not shown) provided on the lower surface of the support end member 20. A gear (not shown) rotated by the hydraulic motor 29 meshes with one of the gears, and the drive roller 2 is rotated through the two gears.
3 and 24 are rotated in opposite directions, that is, in the direction of the arrow in FIG. 30, 31
The jaw members 30 and 31, which prevent the float rope 32 and the fishnet from slipping upward during net-hauling work, have a fixed structure and do not rotate together with the drive rollers 23 and 24.

Further, the guide roller 24 guides the dipstick 26 and supplies it to the drive rollers 23 and 24, and is configured to have a smaller diameter than the drive rollers 23 and 24.

In the figure, 33 is a valve box for operating the hydraulic motors 19, 29 and cylinder 22, and this valve box 33 houses a plurality of valves (not shown) that are switched and operated by an operating lever 34. . Further, the illustration of the hydraulic conduit connecting the swing hydraulic motors 19, 29 and the cylinder 22 to the valve is omitted.

In the net lifting machine configured as described above, the present invention provides a first driving roller 23 and a second driving roller 2 from the upper side of the net lifting, as shown in FIG.
A direction line a connecting the two intersections of the respective central axes of No. 4 and the plane including the mesh contact surface 20a of the support end member 20;
-a, and at an appropriate position (indicated by diagonal lines) on the downstream side of the straight line c-c perpendicular to both straight lines of the central axis of the first drive roller 23, or an extension thereof. A second guide roller 37 having the same structure as the first guide roller 25 is provided so as to be freely rotatable so that the line intersects with a plane including the mesh contact surface of the support end member 20. The guide roller 37 is configured to have substantially the same length as the drive rollers 23 and 24, or longer than this. In this embodiment, the second guide roller 37 is connected to the first and second drive rollers 23 and 2 so as not to reduce the wrapping angle to the second drive roller 24.
4, and a direction line dd, which connects the net exit side of the second drive roller 24 and the net inlet of the net guide roller, are provided at a position where they are substantially perpendicular to each other.

[Explanation of action]

Next, the operation will be explained based on the above embodiment. Figure 5 shows a purse seine operation in a very normal state, and Figure 6 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. , FIG. 7 shows a purse seine operation when the catch is large or the net load is large during rough weather.

FIG. 5 shows that the float rope 32, the body net 36, and the ring-removed sinker rope 26 are taken in from between the drive roller 23 and the guide roller 25, and are wrapped around the drive rollers 23 and 24 in an S-shape. The net is moved from the upper side A of the net to the lower side B of the net, and after leaving the drive roller 24, the net is moved to the net sorting machine 35.
guide to ensure smooth fishing. As shown in FIG. 9, the swivel base 16 is rotated via the hydraulic motor 19 in order to adapt to the change in the angle of incidence on the float, and the float rope helps the friction between the drive rollers 23 and 24. Roller parts 23b, 24b without means
The cylinder 2 is designed to fit the roller portions 23a and 24a having friction promoting means.
2 to remove the support end member, that is, the drive roller 2.
3 and 24 to adjust the lifting speeds of the float line, body net, and sinker line, thereby achieving consistent lifting of nets.

In FIG. 6, the contact areas of the float rope, the fish net, and the sinker rope with respect to the drive rollers 23 and 24 are controlled to be small, and in FIG. 7, on the contrary, the contact areas are adjusted to be large.

In addition, as shown in FIG. 7, in order to increase the winding angle of the net fabric around the drive roller 24 in order to prevent the net fabric from slipping when a large force is applied to the net fabric to be lifted, Even if the upper side of the net is turned in the bow direction, the second guide roller 37 rationally prevents the net fabric from getting entangled with the second drive roller 24. In addition, in the case of casting nets, this net lifting machine is not necessary, and placing it in the position shown in Figure 5 will get in the way when casting the net, so the net lifting machine is moved horizontally on the guide rail 11, and the net lifting machine is moved horizontally on the guide rail 11. It is necessary to fix the net lifter in position A as shown in FIG.

〔Effect of the invention〕

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

(a) Since the net lifting machine can be moved horizontally in the port and starboard direction of the stern, the net lifting machine can be moved out of the net casting system when casting the net.

(b) Since the upper side of the supporting end member is inclined 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.

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

(d) Furthermore, the net lifting machine is rotated from the angle shown in Fig. 4 to the angle shown in Figs. By changing the net, you can create a net that matches the net load.

(e) Since the support end member equipped with a drive roller and a guide roller 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. The net fabric can be automatically placed on the side hauler by simply moving the screen, and the manual work of passing the net fabric around the side hauler can be greatly reduced.

(f) The presence of the second guide roller can prevent the slack of the fabric past the last drive roller from becoming entangled with the last drive roller. In particular, as shown in Figure 7, when a large force is applied to the net fabric to be lifted, in order to prevent the fabric from slipping, the winding angle of the fabric to the drive roller is set large.
Even if the upper side of the net hauling net is turned toward the bow as shown in the figure, the effect is to move the netting away from the last driving roller as shown in FIG. Accidents such as broken nets can be reasonably prevented.

(g) 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 can be hung on the side hauler, improving the efficiency of side hoisting.

[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 swivel table, Fig. 4 is a plan view of the supporting end member, and Figs. Figure 7 is an explanatory diagram of the net lifting operation state, Figures 8 a, b, and c are flow diagrams from the start of hoisting to the latter half of the net lifting state, and Figure 9 is an explanatory diagram of the net lifting operation state.
The figure is an explanatory diagram showing changes in the angle of incidence on the float, No. 10.
Figures 1 to 12 are front views of a net hauling machine for purse seine fishing that is currently commonly used, Figure 13 is a front view of a net hauling machine that is the subject of improvement of the present invention, and Figure 14 is a plan view of the same. It is. 11... Guide rail, 12... Hull, 13...
Frame, 14...Protrusion, 15...Screw rod, 16...Swivel base, 17...Worm wheel, 18...Worm gear, 19...Hydraulic motor, 20...Support end member, 20a...Net contact surface, 21... Pivotal support structure, 22... Cylinder, 23, 24... Driving roller, 23a, 24a... Roller section with friction promoting means, 23b, 24b... Roller section without friction promoting means, 25... ...first guide roller, 26...
...Sink rope, 28...Latching groove, 29...Hydraulic motor, 30, 31...Jaw member, 32...Float rope, 3
3... Valve box, 34... Operating lever, 35... Net sorter, 36... Body net, 37... Second guide roller.

Claims (1)

[Claims] 1 (a) A plurality of drive rollers for lifting nets having a length larger than a diameter are mounted in parallel on a common support end member at one end thereof, and the drive rollers adjacent to each other are arranged in opposite directions. (b) A first guide roller having a smaller diameter than the driving roller is placed above the driving roller and parallel to the driving roller. , is freely rotatably attached to the supporting end member that is common to the drive roller; The net lifting direction line along the surface is configured such that the upper side A of lifting nets is inclined downward with respect to the horizontal plane, and (d) the first driving roller and the last driving roller from the upper side of lifting nets are The lift is higher than the straight line connecting the two intersections of the central axes of the driving rollers and the plane including the mesh contact surface of the support end member, and the straight line perpendicular to both straight lines of the central axis of the first driving roller. It is freely rotatable so that its axis or its extension line intersects the plane containing the mesh contact surface of the support end member at any point on the lower side of the screen, and is approximately the same length as the drive roller or longer than this. A second guide roller is provided, (e) the net lifting mechanism is supported on a swivel base that rotatably supports the swivel, and a pedestal supporting the swivel base is disposed so as to be horizontally movable between the port and starboard sides of the stern. A net lifting machine for purse seine fishing. 2. A net hauler for purse seine fishing according to claim 1, wherein the angle of inclination of the net contacting surface of the support end member can be varied within a range of 20 degrees or more. 3. There are two drive rollers, and the intersection of the axis of the second guide roller or its extension with a plane including the mesh contact surface of the support end member is an axis passing through the center of both drive shafts; A second guide roller is provided at an arbitrary location on the net contacting surface of the supporting end member on the lower side of the net hoisting side, which passes through the center of the first drive shaft and is surrounded by an axis perpendicular to the above axis. A purse seine fishing net lifting machine according to claim 1 or 2, characterized in that: