Fishing net storage support system

Abstract

To provide a fishing net storage assistance system capable of reducing labor during a first net pulling-up process.SOLUTION: A fishing net storage assistance system for pulling up fishing nets from the sea and storing them in an organized manner on a net stand on a deck, comprises: a net pulling-up machine that is disposed at a stern portion of the deck for pulling up the fishing net from the sea; a net handling device that further lifts the fishing net pulled up by the net pulling-up machine into the air above the net stand set on the deck, turns its direction, and makes it hang down; a float processing device that guides the float side of the fishing net descending from the net handling device to the float region of the net stand; a sinker processing device that guides the sinker side of the fishing net descending from the net handling device to the sinker region of the net stand; and a net processing device that assists in the spreading of a net body portion when placing the net body portion of the fishing net descending from the net handling device into the net body region of the net stand.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a fishing net storage assistance system.

Background Art

[0002] Since ancient times, fishing has been carried out day and night to deliver fish to our dinner tables.

[0003] Among several fishing methods, for example, in purse seine fishing, a fleet is composed of a net boat (the main boat), a scout boat, a carrier boat, etc., the fish school is surrounded by a fishing net, and while the fishing net is being recovered onto the net boat, the range is gradually narrowed until finally a state is formed where a fish pen is formed by the fishing net between the net boat and the carrier boat, and the fish are recovered by putting a tamo (catch net). In the following description, the process of recovering most of the fishing net onto the net boat from the large-scale side and gradually narrowing the range is called the first hauling process, the process of recovering the fish-catching side of the fishing net using a side roller after the hauling process is called the second hauling process, and the state where a fish pen is formed by the fishing net is also referred to as the fish loading form.

[0004] In the first hauling process, an operation is performed to recover the fishing net that is hung and flowing down onto the net platform by using a hauling machine arranged at the stern or a net sorting machine arranged above the net platform.

[0005] Also, since it is necessary for the fishing net to be smoothly paid out during the next net casting, during recovery, guiding operations are performed by a plurality of crew members so that each part of the fishing net, for example, the float side, the body net part, and the sinker side, lands at appropriate positions on the net platform.

[0006] However, since this guiding operation of the fishing net is heavy labor, labor saving is desired.

[0007] Therefore, for example, as described in Patent Document 1 below, a net processing device for assisting the deployment of the body net part of a fishing net has been proposed.

Prior Art Documents

Patent Documents

[0008] [Patent Document 1] Japanese Patent Application Publication No. 04-183344 [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] However, such standalone machinery alone is still insufficient for achieving sufficient labor savings.

[0010] The present invention has been made in view of these circumstances, and provides a fishing net storage assistance system that can reduce labor in the first net hauling process. [Means for solving the problem]

[0011] To solve the above-mentioned conventional problems, the fishing net storage assistance system according to the present invention comprises: (1) a fishing net storage assistance system for retrieving a fishing net from the sea and storing it on a net stand on the deck, the system comprising: a net hauling machine positioned at the stern of the deck for retrieving the fishing net from the sea; a net handling device for further lifting the fishing net retrieved by the net hauling machine above a net stand set on the deck, changing its direction, and lowering it; a float handling device for guiding the float end of the fishing net descending from the net handling device into the float area of ​​the net stand; a sinker handling device for guiding the sinker end of the fishing net descending from the net handling device into the sinker area of ​​the net stand; and a net handling device for assisting in the deployment of the net body when positioning the net body of the fishing net descending from the net handling device into the net body area of ​​the net stand. The net hauling machine comprises a rotating drum with a substantially horizontal axis that has a substantially V-shaped annular groove on its circumferential surface and slides the fishing net along it while pulling it onto the ship, and a pair of guide rollers with a substantially vertical axis that are located upstream of the rotating drum to converge the fishing net, which has been cast out in an expansive manner toward the sea, to a width that can be wound up, wherein the pair of guide rollers consists of a sliding roller that guides the float side of the fishing net to the rotating drum and a guide roller that guides the sinker side, and the diameter of the lower half of the guide roller is expanded to a position where it substantially contacts a virtual plane that is normal to the axis of the rotating drum and cuts the V-shaped bottom of the annular groove I decided to do that.

[0012] Furthermore, the fishing net storage assistance system according to the present invention also has the following features. (2 )before The sinker area is an area set adjacent to the main net area on either the left or right side of the net platform, and the sinker processing device is provided in the form of a partition wall at the boundary between the sinker area and the main net area. ( 3The sinker processing device includes a sinker guide roller section that is movable along the partition-shaped device housing section, and the sinker guide roller section has a main roller that guides the sinker-side end of the sinker and a sub-roller that guides the net section closer to the float side than the sinker-side end, and the main roller is configured to rotate in the forward direction to guide the sinker-side end toward the sinker area, while the sub-roller is configured to rotate in the reverse direction to guide the net section toward the net area. ( 4 The net processing device comprises a net processing roller having friction surfaces on one and the other sides of a rotatable rod-shaped body that are oppositely threaded, and a support part that supports the net processing roller so as to contact the net portion of the fishing net hanging down from the net handling device, wherein the support part is a cantilevered arm with its base on the side of the hull on the float area side. ( 5 The vessel shall be equipped with a side-mounted fishing net winding device for tightening the fishing nets in accordance with the fish loading configuration. ( 6 The aforementioned side fishing net winding device comprises a side roller arranged along one side of the hull, and a fish-holding roller that rotates in contact with the rotating surface of the side roller. ( 7 The net handling device is designed to hoist the fishing net, which has been pulled up, onto the drum section of a net handling machine located at the tip of a crane device, and then lower it down. The drum section is composed of a left drum section and a right drum section, and each drum section is made capable of rotating at different speeds. Furthermore, in the net hauling machine according to the present invention, (8) a net hauling machine positioned at the stern of the deck and used to haul fishing nets out of the sea, comprising: a rotating drum having a substantially V-shaped annular groove on its circumferential surface and a substantially horizontal axis for hauling the fishing net onto the ship while sliding it in contact with it; and a pair of guide rollers having a substantially vertical axis provided upstream of the rotating drum to converge the fishing net, which has been cast out in an expansive manner toward the sea, to a width that can be wound up, wherein the pair of guide rollers consists of a sliding roller that guides the float side of the fishing net toward the rotating drum and a guide roller that guides the sinker side, and the diameter of the lower half of the guide roller is widened to a position where it substantially contacts a virtual plane that has the axis of the rotating drum as its normal and cuts the V-shaped bottom of the annular groove. [Effects of the Invention]

[0013] According to the fishing net storage assistance system of the present invention, in a fishing net storage assistance system for lifting a fishing net from the sea and storing it while arranging it on a net stand on the deck, a net hoisting machine arranged at the stern part of the deck for lifting the fishing net from the sea, a net sorting device for further lifting the fishing net lifted by the net hoisting machine above the net stand set on the deck, changing the direction and lowering it, a float processing device for guiding the float side of the fishing net descending from the net sorting device to the float area of the net stand, a sinker processing device for guiding the sinker side of the fishing net descending from the net sorting device to the sinker area of the net stand, and a net processing device for assisting the deployment of the body net part when arranging the body net part of the fishing net descending from the net sorting device in the body net area of the net stand. Therefore, it is possible to provide a fishing net storage assistance system capable of achieving labor saving in the first net hoisting process. Furthermore, according to the net hauling machine of the present invention, a net hauling machine positioned at the stern of the deck and used to haul fishing nets from the sea comprises a rotating drum having a substantially V-shaped annular groove on its circumferential surface and a substantially horizontal axis for hauling the fishing net onto the ship while sliding it in contact with the drum, and a pair of guide rollers having a substantially vertical axis provided upstream of the rotating drum to converge the fishing net, which has been cast out in an expansive manner toward the sea, to a width that can be wound up. The pair of guide rollers consist of a sliding roller that guides the float side of the fishing net toward the rotating drum and a guide roller that guides the sinker side, and the diameter of the lower half of the guide roller is widened to a position where it substantially contacts a virtual plane that is normal to the axis of the rotating drum and cuts the V-shaped bottom of the annular groove, thereby providing a net hauling machine that can reduce labor in the first net hauling process.

Brief Description of the Drawings

[0014] [Figure 1] It is a plan view showing a fishing boat adopted with the fishing net storage assistance system according to this embodiment. [Figure 2] It is a plan view showing a fishing boat adopted with the fishing net storage assistance system according to this embodiment. [Figure 3] It is an explanatory view showing the configuration of the rear part of the deck as seen from the right side. [Figure 4] It is an explanatory view showing the configuration of the rear part of the deck when looking from the bow side towards the stern direction. [Figure 5] It is an explanatory view showing the configuration of the net hoisting machine. [Figure 6] It is an explanatory view showing the configuration of the sinker processing device. [Figure 7] It is an explanatory view showing the configuration of the sinker processing device. [Figure 8] It is an explanatory view showing the configuration of the roller part. [Figure 9] It is an explanatory view showing the configuration of the net processing device. [Figure 10] It is an explanatory view showing the configuration of the net processing device. [Figure 11] It is an explanatory view showing the configuration of the functional part. [Figure 12]This is an explanatory diagram showing the configuration of the fishing net winding section on the side of the ship. [Figure 13] This is an explanatory diagram showing the configuration of the fishing net winding section on the side of the ship. [Figure 14] This is an explanatory diagram showing the configuration of a modified net handling machine. [Figure 15] This is an explanatory diagram showing the configuration of the drive circuit section of the net handling machine. [Figure 16] This is the flow chart for the switching control process. [Modes for carrying out the invention]

[0015] The fishing net storage assistance system according to the present invention will be described below with reference to the drawings. Figure 1 is a plan view showing the configuration of a fishing vessel 10 equipped with the fishing net storage assistance system S according to this embodiment. In the following description, the right side of the drawing of the fishing vessel 10 shown in Figure 1(a) will be referred to as the bow side, the left side as the stern side, the area above the centerline P1 as the port side, and the area below as the starboard side. Also, the upper and lower parts of the fishing vessel 10 in the height direction will be referred to as up and down, respectively.

[0016] As shown in Figure 1(a), various fishing equipment is fitted out on the deck 11 of the fishing vessel 10. In particular, a stern fishing net winding section 12 is located around the net platform 15 in the area closer to the stern than the center of the hull, and a side fishing net winding section 13 is located on the starboard side, extending from the stern to the bow.

[0017] Figure 1(b) is an enlarged view of the area near the stern where the stern fishing net winding section 12 is located. As shown in Figure 1(b), the stern fishing net winding section 12 is composed of a net hoisting machine 16, a net handling device 17, a float handling device 18, a sinker handling device 19, and a net handling device 20, all arranged around the net platform 15.

[0018] Furthermore, as shown in Figure 2, the net platform 15 defines a float region 15a along the port side where the floats of the hoisted fishing net are placed, and a sinker region 15b along the starboard side where the sinkers are placed.

[0019] Furthermore, the area between the float region 15a and the sinker region 15b is designated as the net region 15c, where the net body of the fishing net is located, and the aforementioned sinker processing device 19 is positioned at the boundary between the net region 15c and the sinker region 15b.

[0020] To briefly explain the fishing net retrieval process with reference to the diagram, in the first net hauling process mentioned above, as shown in Figure 3, the fishing net M that was cast into the sea is pulled up by a net hauling machine 16 located at the stern (starboard stern in this embodiment), and then the net handling device 17 further lifts it to a position above the net platform 15.

[0021] The pulled-up fishing net M is redirected via the net handling machine 21 located at the tip of the net handling device 17, and then hangs down.

[0022] At this time, as shown in Figure 4, the fishing net M is unfolded from a converged state, the float section Ma is guided to the float region 15a by the float processing device 18, the sinker section Mb is guided to the sinker region 15b by the sinker processing device 19, and the main net section Mc is unfolded in the direction of the ship by the net processing device 20 and lands in the main net region 15c, where it is positioned and stored.

[0023] Then, once the majority of the fishing net M has been recovered by the main boat, the side-mounted fishing net winding unit 13 shown in Figure 1(a) is used to prepare the fishing net M for loading fish, and the fish catcher recovers the net and loads the fish (second net hauling process).

[0024] Next, the configuration of each device constituting the stern fishing net winding section 12 will be explained. Figure 5 is an explanatory diagram showing the configuration of the net hauling machine 16. Figure 5(a) is an explanatory diagram showing the net hauling machine 16 as viewed from viewpoint Q1 in Figure 2, and Figure 5(b) is an explanatory diagram showing the net hauling machine 16 as viewed from viewpoint Q2.

[0025] As shown in Figure 5, the net hauling machine 16 consists of a base section 23 and a net hauling body section 24. The net hauling body section 24 is constructed by placing a rotating drum 26 between two side plates 25, 25, and is capable of hauling the fishing net M from the sea using power from a hydraulic motor 27.

[0026] Furthermore, the rotating drum 26 has an annular V-shaped groove (annular groove 29) formed therein, as shown in Figure 5(b).

[0027] Furthermore, guide roller sections 28 are provided near the seaward opening ends of the two side plates 25, 25 that constitute the main body of the net lifting unit 24, extending approximately vertically at a slight angle toward the sea surface, in order to converge the fishing net M, which is deployed in an expanded manner, to a width that can be wound up by the rotating drum 26.

[0028] The guide roller section 28 is composed of a sliding roller 30 that guides the float-side Ma and a guide roller 31 that guides the sinker-side Mb.

[0029] In particular, the guide roller 31 has a narrow diameter section 31a in its upper half and a wide diameter section 31b in its lower half. The diameter of this wide diameter section 31b is widened to the extent that it contacts the virtual plane P2 that cuts the V-shaped bottom of the annular groove 29.

[0030] Furthermore, with a net hauling machine 16 having such a configuration, the sinker Mb of the hauled fishing net M can be firmly guided to the bottom of the V-shaped groove of the annular groove 29, thereby preventing the fishing net M from twisting.

[0031] Furthermore, since the upper half of the guide roller 31 is a narrow-diameter section 31a, even if a large float is placed in the fishing net M, it can be lifted without any problems in the wide opening between the sliding roller 30 and the narrow-diameter section 31a.

[0032] As shown in Figure 3, the net handling device 17 consists of a crane device 17a and a net handling machine 21. The fishing net M, which has been lifted up by the net lifting machine 16, is further lifted to a position above the net stand 15, and then the direction is changed so that the fishing net M is lowered and sent out towards the net stand 15, thereby facilitating the placement and storage of the fishing net M.

[0033] As shown in Figures 1(b) and 4, the float processing device 18 consists of a travel base 18a, an arm section 18b, and a drum section 18c. Note that the float processing device 18 is omitted from the description in Figure 3.

[0034] The travel base 18a is a part for moving the float processing device 18 along a rail section 33 that is arranged at the port side end of the net platform 15 to extend in the bow-stern direction, and the arm section 18b is a support section for positioning the drum section 18c in the desired position.

[0035] Furthermore, the drum section 18c is the part that wraps the float section Ma of the fishing net M around and lowers it into the float area 15a, and in cooperation with the running base section 18a and the arm section 18b, the lowering position is adjusted to the desired position.

[0036] The sinker processing device 19 is a device for guiding the sinker portion Mb of the fishing net M descending from the net handling device 17 to the sinker region 15b of the net platform 15. As shown in Figures 1 and 2 in plan view and in Figure 4 in side view, it is installed as a partition wall at the boundary between the sinker region 15b and the main net region 15c.

[0037] As shown in Figures 6(a) and 6(b), the sinker processing device 19 consists of a device housing 35 and an internal mechanism 36.

[0038] The device housing 35 is the part that forms the exterior of the sinker processing device 19, and the stern-side 1 / 3 to 1 / 4 of the longitudinal direction is inclined to gradually become lower toward the stern. Furthermore, the sinker processing device 19 is hollow inside to accommodate the internal mechanism 36, and a roughly rectangular opening 35a is provided on the surface facing the sinker area 15b in the bow-side 2 / 3 to 3 / 4 of the longitudinal direction.

[0039] As shown in Figure 6(b), the internal mechanism 36 includes a rail 37, a moving body 38, and a drive mechanism 39.

[0040] The rail 37 is arranged inside the device housing 35 along the longitudinal direction of the device housing 35 and defines the range of movement of the movable body 38.

[0041] The movable body 38 is a part for guiding the sinker portion Mb of the fishing net M to the sinker region 15b, and is configured to be guided to a desired position in the sinker region 15b by moving along the rail 37.

[0042] The drive mechanism 39 is the part that moves the mobile body 38 along the rail 37.

[0043] Here, the configuration of the moving body 38 will be explained in detail with reference to Figures 7 and 8. Figure 7 is an explanatory diagram showing the cross-sectional structure of the sinker region 15b when viewed from the bow towards the stern.

[0044] As shown in Figure 7, the movable body 38 is composed of a movable base 40, an arm portion 41, and a roller portion 42.

[0045] The movable base 40 is a base for moving the movable body 38 along the rail 37.

[0046] The arm portion 41 is the part that moves the roller portion 42 together with the movable base portion 40. The arm portion 41 also has the role of supporting the roller portion 42 so that it can extend and retract from the device housing portion 35 through the opening 35a between the stored position shown by the dashed line and the usage position shown by the solid line in Figure 7.

[0047] The roller section 42 is a roller-shaped part located at the tip of the arm section 41, and is a part that guides the sinker section Mb of the fishing net M into the sinker region 15b.

[0048] Furthermore, the roller section 42 has the function of actively guiding the sinker-side end Md of the sinker-side Mb of the fishing net M into the sinker region 15b, while actively guiding the net section Me closer to the float side than the sinker-side end towards the main net region 15c so as not to enter the sinker region 15b as much as possible.

[0049] Figure 8 is an explanatory diagram showing the relationship between the roller section 42 and the sinker Mb of the fishing net M. As shown in Figure 8, the roller section 42 comprises a main roller 44 and a sub-roller 45. In this embodiment, although not limited thereto, the main roller 44 and the sub-roller 45 are arranged coaxially.

[0050] The main roller 44 is a roller that rotates in the forward direction indicated by the black arrow near the roller section 42 in Figure 7, and is a roller that actively guides the fishing net M it comes into contact with toward the sinker region 15b.

[0051] The auxiliary roller 45 is a roller that rotates in the reverse direction indicated by the white arrow, and is a roller that actively guides the fishing net M that it comes into contact with over the sinker processing device 19 and toward the main net area 15c, so as not to enter the sinker area 15b.

[0052] In this embodiment, as shown in Figure 8, the sub-roller 45 is configured to have the mesh portion Me in contact with the sub-roller 45 by using the sub-roller 45 while the sinker-side end Md of the sinker-side Mb is in contact with the main roller 44 which rotates in the forward direction.

[0053] With this configuration, the amount of netting Me flowing into the sinker region 15b can be reduced as much as possible, allowing for a more orderly storage of the fishing net M.

[0054] The configuration of the net processing device 20 is shown in Figures 9 to 11. Figure 9 is an explanatory diagram showing the external appearance of the net processing device 20 from a viewpoint looking from the bow towards the stern, Figure 10 is an explanatory diagram of the net processing device 20 in a plan view, and Figure 11 is an explanatory diagram showing the configuration of the functional unit 47 from a viewpoint looking from the starboard side towards the port side.

[0055] While net processing devices themselves have existed for some time, gate-type net processing devices, such as those described in Japanese Patent Publication No. 04-183344, can get in the way of work because they remain suspended over the net stand even when not in use. The net processing device 20 of the fishing net storage assistance system S according to this embodiment is distinctive in that it solves this problem.

[0056] As shown in Figures 9 and 10, the mesh processing device 20 consists of a support section 46 and a functional section 47.

[0057] The support section 46 is a part that supports the functional section 47 to position it in the desired location, and comprises a movable base 54, a vertical section 48 that extends in the vertical direction, and a horizontal section 49 that extends in the horizontal direction. The vertical section 48 is erected on the movable base 54, and the vertical section 48 and the horizontal section 49 are connected at approximately a right angle.

[0058] The movable base 54 is the part that moves the net processing device 20 in the bow-to-stern direction along the rail section 33 located on the port side.

[0059] Furthermore, a height adjustment cylinder 51 is provided via a link mechanism 50 on the inner corner side of the connecting portion between the vertical section 48 and the horizontal section 49. By extending and retracting the height adjustment cylinder 51, the vertical position of the functional section 47 can be adjusted while maintaining the horizontal position of the horizontal section 49.

[0060] Furthermore, a functional unit 47 is attached to the tip of the horizontal section 49 via a side-direction adjustment cylinder 52, and the side-direction position of the functional unit 47 can be adjusted by extending and retracting the side-direction adjustment cylinder 52.

[0061] Furthermore, a storage cylinder 53 is provided in the vertical section 48. This storage cylinder 53 is a cylinder for changing the posture between a working posture in which the horizontal section 49 and functional section 47 are extended in a direction perpendicular to the rail section 33, as shown in Figure 10(a), and a storage posture in which the horizontal section 49 and functional section 47 are extended substantially parallel to the rail section 33, as shown in Figure 10(b).

[0062] In other words, when the net processing device 20 is not in use, the functional unit 47 does not remain positioned on the net platform 15, but is configured to be moved to the side of the ship as needed. With this configuration, the net processing device 20 does not get in the way even when it is not in use.

[0063] Furthermore, this effect stems from the fact that the support section 46 is configured as a so-called cantilever arm, which dramatically improves work efficiency compared to the gate-type mesh processing device mentioned earlier.

[0064] The functional section 47 consists of a support rod 55, suspension rods 56, 56, and a mesh processing roller 57.

[0065] The support rod 55 functions as a pivot shaft for swinging the mesh processing roller 57 via the suspension rods 56, 56, and is arranged connected to the horizontal portion 49 of the support portion 46 in a direction extending from it.

[0066] The suspension rods 56, 56 are support members for swingably supporting the mesh processing roller 57.

[0067] The net processing roller 57 is a roller that contacts the body of the fishing net M Mc to spread the net in the direction of the ship's side. In this embodiment, when the net processing roller 57 is rotated along the downstream direction of the fishing net M, spiral friction bodies are formed on the left and right sides in a reverse screw shape (reverse spiral shape) with the approximate center of the longitudinal direction as the dividing line, so that the fishing net M spreads out to the left and right.

[0068] Furthermore, as shown in Figure 11, a swing cylinder 58 is interposed between the support rod 55 and the suspension rods 56, 56, allowing it to swing between a hanging position shown by a solid line and a protruding position shown by a dashed line, so that the lowered net section Mc can be stored in a web-like shape. In Figure 11, reference numeral 59a denotes a drive motor 59a for rotating the net processing roller 57, and 59b denotes a chain 59b for transmitting power from the drive motor 59a to the net processing roller 57.

[0069] As described above, the fishing net storage assistance system S according to this embodiment is equipped with the stern-side fishing net winding unit 12 described above, and in the first net hauling process, in which most of the fishing net is recovered onto the net boat from the main side and the range is gradually narrowed, the work can be carried out efficiently while saving labor.

[0070] Next, the side fishing net winding section 13 shown in Figure 1(a) will be described. As shown in Figure 12, the side fishing net winding section 13 is equipped with a side roller 60 and a fish tightening roller device 61.

[0071] The side roller 60 is a long, rod-shaped (log-shaped) roller positioned along the starboard side with its axis oriented from bow to stern. This side roller 60 is used during the second net-hauling process for loading fish and retrieving the fish-catching side of the fishing net M. As shown in Figure 12, the side roller 60 rotates in the winding direction, and the side roller 60 is used to assist in bringing the fishing net M, which is held by the operator 62, into contact with it as they pull it onto the ship.

[0072] As shown in Figures 12 and 13, the fish clamping roller device 61 consists of an arm portion 63 and a fish clamping roller 64.

[0073] The arm portion 63 has its base fixed to the hull side and functions as a support for supporting the fish clamping roller 64 located at the tip side so that it can move toward and away from the side roller 60 by two cylinders 65, 65.

[0074] The fish clamping roller 64 is a roller that rotates while being pressed against the rotating surface of the side roller 60, thereby lifting the fishing net M that is held between the side roller 60 and the fish clamping roller 64.

[0075] In the second net-hauling process, several workers 62 line up along the side rollers 60 and manually haul in the fishing net M. However, the fishing net storage assistance system S according to this embodiment is equipped with a side fishing net winding unit 13, which dramatically reduces the labor required of the workers 62 in this second net-hauling process.

[0076] [Variation] As described above, the fishing net storage assistance system S according to this embodiment achieves labor savings in the first net hauling process by including a net hauling machine 16, a net handling device 17, a float processing device 18, a sinker processing device 19, and a net processing device 20.

[0077] In particular, the twisting that occurs in the fishing net M during retrieval hinders the smooth organization and storage of the fishing net M on the net stand 15, and conventionally, it was necessary to assign workers to untangle the net.

[0078] In this regard, the fishing net storage assistance system S according to this embodiment is equipped with a guide roller section 28 with a characteristic structure on the net hauling machine 16, which suppresses the occurrence of twisting and greatly contributes to labor saving.

[0079] However, even in a fishing net storage support system S equipped with such a net hauling machine 16, there was still room to try further toning suppression.

[0080] Therefore, in this modified example, a net handling machine equipped with a twist suppression mechanism and a fishing net storage assistance system equipped with the same net handling machine will be described. Specifically, the fishing net storage assistance system S2 according to the modified example has the same configuration as the fishing net storage assistance system S described above, but differs in that the net handling machine is equipped with a twist suppression mechanism.

[0081] Figure 14 is an explanatory diagram showing a modified example of the net handling machine 70 of the fishing net storage auxiliary system S2. Figure 14(a) shows the external appearance of the net handling machine 70, and Figure 14(b) shows the internal structure of the net handling machine 70 with a portion cut out.

[0082] As shown in Figures 14(a) and 14(b), the net handling machine 70 consists of a shaft support 71, a drum shaft 72, a drum section 73, and a suspension connecting section 74.

[0083] The shaft support 71 is a support member that functions as a bearing for the drum shaft 72, which is the rotation axis of the drum section 73. The shaft support 71 comprises a left plate section 71L and a right plate section 71R, and the drum shaft 72 is arranged across both of these.

[0084] Furthermore, the left plate portion 71L and the right plate portion 71R of the shaft support 71 are equipped with a hydraulic motor 75L for the left drum and a hydraulic motor 75R for the right drum, respectively, so that one of the left drum section 73L and the right drum section 73R of the drum section 73, which will be described later, can be rotated faster than the other.

[0085] The drum shaft 72 is the shaft for rotating the drum portion 73 between the gaps in the shaft support 71, that is, between the left plate portion 71L and the right plate portion 71R.

[0086] The drum section 73 is rotated by a hydraulic motor mounted on the shaft support 71 and is the part that feeds the swung fishing net M downward. In particular, the drum section 73 according to this modified example comprises a roughly bowl-shaped left drum section 73L and a right drum section 73R, which are inserted onto the drum shaft 72 so that they can rotate independently.

[0087] As shown in Figure 14(b), internal gears 76 are formed on the inner circumferential surfaces of the arm-shaped edges of the left drum segment 73L and the right drum segment 73R. Drive gears 77, which are located on the drive shafts of the left drum hydraulic motor 75L and the right drum hydraulic motor 75R, respectively, are meshed with these internal gears 76. The left drum segment 73L and the right drum segment 73R can rotate at different rotational speeds depending on the drive speed of the left drum hydraulic motor 75L and the right drum segment 73R, respectively, as shown by the white arrows in Figure 14(a).

[0088] The suspension connection section 74 is the part that connects to the tip of the crane device 17a to suspend the net handling machine 70. In the front view shown in Figures 14(a) and 14(b), it is roughly arched, and each end is connected to the upper part of the left plate section 71L and the right plate section 71R.

[0089] Next, the hydraulic circuit for driving the net handling machine 70 will be described. Among the hydraulic circuits that drive hydraulic mechanism components at various locations on the ship, the fishing net storage auxiliary system S2 according to this modified example is equipped with a net handling machine drive circuit 110 for driving the net handling machine 70. Figure 15 is a hydraulic circuit diagram showing an excerpt of the configuration of the net handling machine drive circuit 110 related to driving the net handling machine 70.

[0090] As shown in Figure 15, the net handling machine drive circuit 110 comprises a main circuit 111 and a sub-circuit 112.

[0091] The main circuit section 111 is a circuit for supplying hydraulic fluid evenly to both the left drum hydraulic motor 75L and the right drum hydraulic motor 75R. The main circuit section 111 is also a circuit for adjusting the rotation speed and switching between forward and reverse rotation.

[0092] Specifically, the main circuit section 111 includes a main flow rate adjustment section 115, a counterbalancing section 116, a distribution section 117, and a hydraulic motor section 118.

[0093] The main flow rate adjustment unit 115 is the part that switches the supply and stop of hydraulic fluid from the pressure line P, and switches the direction of supply, thereby driving and stopping the hydraulic motor 75L for the left drum and the hydraulic motor 75R for the right drum, and switching between forward and reverse rotation.

[0094] The main flow rate adjustment unit 115 is equipped with a manual switching valve 120, which can be switched between three states by operating the operating lever 121: a parallel communication state in which hydraulic pressure from the first port, which is the pressure inlet, is output to the third port; a closed state in which hydraulic pressure from the first port is not output to either port; and a cross-communication state in which hydraulic pressure from the first port is output to the fourth port. The second port is a port for hydraulic pressure return connected to the tank line T. In this modified example, the operating lever 121 is connected to a separate hydraulic system and can be operated remotely.

[0095] Furthermore, the manual switching valve 120 allows for adjustment of the oil supply amount by operating the operating lever 121.

[0096] The operating lever 121 is also equipped with a switching position detection means 121a that can detect whether the switching position of the operating lever 121 is at least in a closed state. This switching position detection means 121a is electrically connected to a control unit (not shown), and whether or not the manual switching valve 120 is in a closed state is referenced by the control unit in the switching control of the flow path switching unit 127, which will be described later.

[0097] The counterbalancing unit 116 is a part that suppresses the runaway operation of both hydraulic motors 75L and 75R caused by the fishing net M being hoisted around by the net handling machine 70 falling due to gravity.

[0098] The distribution section 117 includes a first port which is a pressure inlet, and second and third ports which are outlets, and is a part for evenly distributing the hydraulic fluid supplied from the first port to the second and third ports.

[0099] The first port of the distribution unit 117 is connected to the third port of the main flow rate adjustment unit 115 via the counterbalancing unit 116. The second port is connected to the first port of the hydraulic motor unit 118, and the third port is connected to the second port of the hydraulic motor unit 118.

[0100] The hydraulic motor section 118 consists of a hydraulic motor 75L for the left drum, located on the left side plate section 71L of the net handling machine 70, and a hydraulic motor 75R for the right drum, located on the right side plate section 71R.

[0101] The hydraulic motor unit 118 includes a first port connected to the forward rotation port 80a of the left drum hydraulic motor 75L, a second port connected to the forward rotation port 80a of the right drum hydraulic motor 75R, and a third port connected to the reverse rotation port 80b of both the left drum hydraulic motor 75L and the right drum hydraulic motor 75R. The third port is also connected to the fourth port of the main flow rate adjustment unit 115 via the counterbalance unit 116.

[0102] When the manual switching valve 120 of the main flow rate adjustment unit 115 is in parallel communication, hydraulic fluid is supplied to the hydraulic motor unit 118 from the first and second ports. As a result, hydraulic fluid is supplied from the forward rotation port 80a of the left drum hydraulic motor 75L and the right drum hydraulic motor 75R, and both hydraulic motors 75L and 75R rotate in the forward direction. Here, forward rotation refers to the winding rotation direction that lowers the fishing net M, which has been wrapped around the net handling machine 70, onto the net stand.

[0103] Furthermore, the hydraulic fluid discharged from both hydraulic motors 75L and 75R is discharged from the third port and returns to the tank line T via the counterbalancing unit 116 and the main flow rate adjustment unit 115.

[0104] On the other hand, when the manual switching valve 120 of the main flow rate adjustment unit 115 is in cross-communication state, hydraulic fluid is supplied to the hydraulic motor unit 118 from the third port. As a result, hydraulic fluid is supplied from the reverse port 80b of the left drum hydraulic motor 75L and the right drum hydraulic motor 75R, and both hydraulic motors 75L and 75R rotate in the reverse direction of the feed.

[0105] Furthermore, the hydraulic fluid discharged from the forward rotation ports 80a of both hydraulic motors 75L and 75R is discharged from the first and second ports of the hydraulic motor unit 118 and returned to the tank line T via the distribution unit 117, the counterbalancing unit 116, and the main flow rate adjustment unit 115.

[0106] The sub-circuit section 112 is a part that, as needed, supplies a predetermined amount of additional hydraulic fluid to either the hydraulic fluid supplied equally to the left drum hydraulic motor 75L and the right drum hydraulic motor 75R by the distribution section 117 of the main circuit section 111, thereby increasing the rotational speed of the hydraulic motor on the side to which the hydraulic fluid has been added.

[0107] Specifically, the sub-circuit section 112 includes a pressure reducing valve section 125, a sub-flow rate adjustment section 126, and a flow path switching section 127.

[0108] The pressure reducing valve section 125 is a component that reduces the hydraulic pressure of the hydraulic fluid supplied from the pressure line P to an appropriate hydraulic pressure that is commensurate with the additional flow rate. The pressure reducing valve section 125 is equipped with a first port which serves as a pressure inlet and a second port which serves as an outlet for the reduced-pressure hydraulic fluid. The first port is connected to the pressure line P, while the second port is connected to the first port of the auxiliary flow rate adjustment section 126.

[0109] The auxiliary flow rate adjustment unit 126 is a part for adjusting the amount of additional hydraulic fluid supplied, that is, for adjusting the degree of speed increase of the hydraulic motor that is being speed-increased. The auxiliary flow rate adjustment unit 126 is equipped with a first port, which is a hydraulic fluid inlet, and a second port, which is a hydraulic fluid outlet. The first port is connected to the second port of the pressure reducing valve unit 125, allowing it to receive hydraulic fluid that has been depressurized by the pressure reducing valve unit 125, and the second port is connected to the flow path switching unit 127, allowing the flow-adjusted hydraulic fluid to be supplied to the flow path switching unit 127.

[0110] The flow path switching unit 127 is a switching unit that determines whether to add additional hydraulic fluid to the left drum hydraulic motor 75L or the right drum hydraulic motor 75R, that is, which hydraulic motor to speed up, or to set a state where neither hydraulic motor speeds up.

[0111] The flow path switching section 127 includes a first port which serves as the inlet for the hydraulic fluid whose flow rate has been adjusted by the sub-flow rate adjustment section 126, a third port which is an additional hydraulic fluid outlet for speeding up the hydraulic motor 75L for the left drum, and a fourth port which is an additional hydraulic fluid outlet for speeding up the hydraulic motor 75R for the right drum. The second port is a drain port and is connected to the drain line Dr.

[0112] The third port is connected midway through the hydraulic piping that connects the second port of the distribution unit 117 and the first port of the hydraulic motor unit 118, forming a confluence unit 129a for the left drum. In addition to the hydraulic fluid discharged from the second port of the distribution unit 117, it supplies additional hydraulic fluid, enabling the left drum hydraulic motor 75L to increase speed when it is retracting and rotating in the forward direction.

[0113] Similarly, the fourth port is connected to the middle of the hydraulic piping that connects the third port of the distribution unit 117 and the second port of the hydraulic motor unit 118, forming a confluence unit 129b for the right drum. This supply additional hydraulic fluid in addition to the hydraulic fluid discharged from the third port of the distribution unit 117, enabling the hydraulic motor 75R for the right drum to increase speed when it is retracting and rotating in the forward direction.

[0114] Furthermore, the flow path switching section 127 is equipped with a switching valve 127a, which can be switched between three states: a parallel communication state in which hydraulic pressure from the first port is output to the third port; a closed state in which hydraulic pressure from the first port is not output to either port; and a cross-communication state in which hydraulic pressure from the first port is output to the fourth port.

[0115] Furthermore, this switching valve 127a employs a solenoid valve and is electrically connected to a control unit (not shown), allowing the switching to be controlled by the control unit. For example, in the fishing net storage assistance system S2 according to this modified example, the switching of the switching valve 127a is achieved by an operator operating a predetermined operating unit to input to the control unit a speed-up stop instruction to close the switching valve 127a and prevent speed-up of either hydraulic motor, a left motor speed-up instruction to open the switching valve 127a in parallel and increase the speed of the left drum hydraulic motor 75L, and a right motor speed-up instruction to open the switching valve 127a in cross-connection and increase the speed of the right drum hydraulic motor 75R.

[0116] Here, the control process for the switching valve 127a will be explained with reference to Figure 16. Figure 16 is a flowchart showing the switching control process for the switching valve 127a in the control unit. In the fishing net storage assistance system S2 according to this modified example, various processes are implemented in the control unit, such as the main process for coordinating various processes and the process when an operator operates each piece of equipment. However, here we will explain the switching control process for the switching valve 127a, which is executed as one of the subroutines, and will omit explanations of other processes.

[0117] In the switching control process, the control unit refers to the input from the operator's control unit and determines whether or not there has been an instruction to increase or decrease speed (step S11). If it is determined that there has been an instruction to increase or decrease speed (step S11: Yes), the control unit executes the process of switching the switching valve 127a to the closed state (step S12), and returns the process to the address before the branch, such as the main routine. On the other hand, if it is determined that there has been no instruction to increase speed (step S11: No), the control unit moves the process to step S13.

[0118] In step S13, the control unit refers to the switching position detection means 121a and determines whether the switching position of the operating lever 121 is in the closed position, that is, whether the manual switching valve 120 is in the closed state. If it is determined that the manual switching valve 120 is in the closed state (step S13: Yes), the control unit returns the process to the address before the branch. On the other hand, if it is determined that the manual switching valve 120 is not in the closed state (step S13: No), the control unit moves the process to step S14.

[0119] In step S14, the control unit refers to the input from the operator's control unit and determines whether or not there was a left motor speed increase instruction. If it is determined that there was a left motor speed increase instruction (step S14: Yes), the control unit executes the process of switching the switching valve 127a to the parallel communication state (step S15) and returns the process to the address before the branch. On the other hand, if it is determined that there was no left motor speed increase instruction (step S14: No), the control unit moves the process to step S16.

[0120] In step S16, the control unit refers to the input from the operator's control unit and determines whether or not there was a command to increase the speed of the right motor. If it is determined that there was a command to increase the speed of the right motor (step S16: Yes), the control unit executes the process of switching the switching valve 127a to the cross-communication state (step S17) and returns the process to the address before the branch. On the other hand, if it is determined that there was no command to increase the speed of the right motor (step S16: No), the control unit returns the process to the address before the branch.

[0121] Next, the operation of the net handling machine 70 and the net handling machine drive circuit 110, which are configured in this way, will be explained with reference to Figure 15.

[0122] When the operator sets the manual switching valve 120 of the main circuit section 111 to a parallel connection state, both hydraulic motors 75L and 75R rotate in the forward direction when closed, stop when closed, and reverse direction when cross-connected.

[0123] Furthermore, the manual switching valve 120 allows for adjustment of the discharge oil volume by operating the operating lever 121, and the rotation speed of both hydraulic motors 75L and 75R can be adjusted to the desired speed.

[0124] Furthermore, if no additional hydraulic fluid is supplied from the sub-circuit section 112, that is, if the flow path switching section 127 (switching valve 127a) is set to the closed state, the distribution section 117 of the main circuit section 111 will supply hydraulic fluid equally to both hydraulic motors 75L and 75R, so that both drum sections 73L and 73R can rotate together at almost the same speed.

[0125] If twisting occurs in the fishing net M, an attempt is made to eliminate the twist by creating a speed difference between the two drum sections 73L and 73R.

[0126] In other words, if you want to increase the speed of the drum section 73L while adjusting the difference in speed using the sub-flow adjustment unit 126, setting the flow path switching unit 127 to the parallel communication state will supply additional hydraulic fluid to the left drum hydraulic motor 75L, thereby increasing the rotational speed of the left drum hydraulic motor 75L. As a result, in the drum section 73 of the net handling machine 70, the left drum section 73L can be rotated faster than the right drum section 73R.

[0127] Furthermore, if the speed of the right drum section 73R is to be increased, the switching state of the flow path switching section 127 will be set to the cross-communication state, which will supply additional hydraulic fluid to the right drum hydraulic motor 75R, thereby increasing the rotational speed of the right drum hydraulic motor 75R. As a result, in the drum section 73 of the net handling machine 70, the right drum section 73R can be rotated faster than the left drum section 73L.

[0128] In this way, by utilizing the movement associated with the supply of hydraulic fluid from the speed-increasing hydraulic fluid confluence section 129, such as the left drum confluence section 129a and the right drum confluence section 129b, the operator can eliminate twisting in the fishing net M, and further reduce labor by storing the fishing net M while maintaining a speed difference that prevents twisting.

[0129] Furthermore, in the fishing net storage assistance system S2, the switching position detection means 121a and the switching valve 127a are electrically connected to the control unit, and the control unit performs the switching control processing as described above. As a result, even when hydraulic fluid is not supplied to each hydraulic motor in the main circuit unit 111, hydraulic fluid is supplied from the sub-circuit unit 112, preventing the left drum split 73L or the right drum split 73R from rotating.

[0130] As described above, the fishing net storage assistance system S according to this embodiment is a fishing net storage assistance system for retrieving fishing nets from the sea and storing them on a net stand on the deck, and includes a net hauling machine positioned at the stern of the deck for retrieving fishing nets from the sea, a net handling device for further lifting the fishing nets hauled by the net hauling machine above a net stand set on the deck, changing their direction and letting them hang down, a float handling device for guiding the float end of the fishing net descending from the net handling device to the float area of ​​the net stand, a sinker handling device for guiding the sinker end of the fishing net descending from the net handling device to the sinker area of ​​the net stand, and a net handling device for assisting in the deployment of the net body when positioning the net body of the fishing net descending from the net handling device to the net body area of ​​the net stand, thereby providing a fishing net storage assistance system that can reduce labor in the first net hauling process.

[0131] Finally, the above-described embodiments are merely examples of the present invention, and the present invention is not limited to the embodiments described above. Therefore, it goes without saying that various modifications are possible depending on the design, etc., even in embodiments other than those described above, as long as they do not depart from the technical spirit of the present invention.

[0132] In this modified example, the fishing net storage assistance system S2 is equipped with a control unit to perform switching control processing, but it is not limited to this, and the fishing net storage assistance system S may also be equipped with a control unit to perform various processes.

[0133] Furthermore, in this case, the configuration of the control unit is not particularly limited; for example, it can be built using a PCL (Programmable Logic Controller), or it can be built using a computer equipped with a predetermined CPU, ROM, RAM, etc., and various processes can be executed as predetermined software. [Explanation of Symbols]

[0134] 11 Deck 12. Fishing net winding section on the stern side 13 Side fishing net winding section 15 Net stand 15a Float area 15b Shenzi area 15c Body net area 16 Net lifting machine 17 Net sorting device 17a Crane equipment 18. Float treatment device 19. Agglomerate Processing Device 20. Mesh processing device 21 Net sorting machine 28 Guide roller section 29 Annular groove 30 Gripping rollers 31 Guide rollers 31a Narrow diameter part 31b Large diameter part 35 Device housing section 35a opening 44 Main roller 45 Sub-roller 53 Retractable Cylinder 57 Mesh processing roller 58 Oscillating Cylinder 60 Side Rollers 61 Fish-holding roller device 64 Fish-holding roller M fishing net Ma Ukiko-kata Mb Shenzifang Mc body part Md sinker side end Me Amibe P2 Virtual Plane S Fishing net storage support system

Claims

1. In a fishing net storage assistance system for retrieving fishing nets from the sea and storing them neatly on a net stand on the deck, Located at the stern of the deck, it houses a net hauling machine for pulling fishing nets out of the sea, The net handling device, which lifts the fishing nets that have been pulled up by the net hauling machine, further raises them above the net platform set up on the deck, changes their direction, and lowers them down, A float processing device that guides the float side of the fishing net descending from the net handling device into the float area of ​​the net platform, A sinker processing device that guides the sinker portion of the fishing net descending from the net handling device into the sinker area of ​​the net platform, The system includes a net handling device that assists in unfolding the net portion of the fishing net as it descends from the net handling device and is positioned within the net area of ​​the net platform. The aforementioned net hauling machine is A rotating drum with a roughly V-shaped annular groove on its circumferential surface and a roughly horizontal axis for pulling fishing nets onto the ship while maintaining contact with them, It comprises a pair of guide rollers having an axis in a substantially vertical direction, located upstream of the rotating drum, in order to converge the fishing net, which has been deployed in an expansive manner toward the sea, to a width that can be wound up, The fishing net storage assistance system is characterized in that the pair of guide rollers consists of a sliding roller that guides the float side of the fishing net to the rotating drum and a guide roller that guides the sinker side, and the diameter of the lower half of the guide roller is widened to a position where it substantially contacts a virtual plane that is normal to the axis of the rotating drum and cuts the V-shaped bottom of the annular groove.

2. The fishing net storage assistance system according to claim 1, characterized in that the sinker area is an area set adjacent to the main net area on either the left or right side of the net platform, and the sinker processing device is provided in the form of a partition wall at the boundary between the sinker area and the main net area.

3. The sinker processing device includes a sinker guide roller section that is movable along the partition-shaped device housing section, The sinker guide roller section has a main roller that guides the sinker-side end of the sinker and a secondary roller that guides the net section closer to the float side than the sinker-side end. The fishing net storage assistance system according to claim 2, characterized in that the main roller is configured to rotate in the forward direction in which the sinker-side end is guided toward the sinker region, while the sub-roller is configured to rotate in the reverse direction in which the net portion is guided toward the body net region.

4. The aforementioned mesh processing apparatus is A mesh processing roller comprising a rotatable rod-shaped body with friction surfaces on one side and the other side having opposite threads, The net processing device includes a support that supports the net processing roller so that it contacts the net body portion of the fishing net that is suspended from the net processing device, The fishing net storage assistance system according to claim 1, characterized in that the support portion is a cantilever arm having its base on the side of the hull on the float area side.

5. The fishing net storage assistance system according to claim 1, characterized by being equipped with a side fishing net winding device for tightening the fishing net in the manner in which fish are loaded.

6. The aforementioned side fishing net winding device is, A side roller is positioned along one of the sides of the hull, The fishing net storage assistance system according to claim 5, further comprising a fish-binding roller that rotates in contact with the rotating surface of the side roller.

7. The aforementioned net handling device involves hoisting the fishing net onto the drum of a net handling machine installed at the tip of a crane device and then lowering it down. The fishing net storage assistance system according to claim 1, characterized in that the drum section is composed of a left drum section and a right drum section, and each drum section is capable of rotating at different speeds.

8. A net hauling machine positioned at the stern of the deck and used to haul fishing nets out of the sea, A rotating drum with a roughly V-shaped annular groove on its circumferential surface and a roughly horizontal axis for pulling fishing nets onto the ship while maintaining contact with them, It comprises a pair of guide rollers having an axis in a substantially vertical direction, located upstream of the rotating drum, in order to converge the fishing net, which has been deployed in an expansive manner toward the sea, to a width that can be wound up, The aforementioned pair of guide rollers consist of a sliding roller that guides the float side of the fishing net to the rotating drum and a guide roller that guides the sinker side, and the diameter of the lower half of the guide roller is widened to a position where it substantially contacts a virtual plane that is normal to the axis of the rotating drum and cuts through the V-shaped bottom of the annular groove.

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