JPH0546273U - Otter board - Google Patents

Abstract

(57) [Summary] [Purpose] The spread width of the net opening of the dragnet can be adjusted appropriately by a simple operation according to the purpose of the fishery, the fuel consumption of the ship can be reduced, and the handling is easy. Provide a lightweight otter board. In an otter board 1 formed of a multi-leaf board member 2, at least the outermost board member of the multi-leaf board member 2 is formed of a flexible member 2a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lightweight otter board in which the expansion force of a dragnet can be freely adjusted by adjusting the expansion width of a board member.

[0002]

[Prior Art]

 Generally, the opening of the net of the dragnet is performed through a heavy and standard otter board. That is, an otter board is attached to the ends of the two warps pulled out from the ship, and both sleeve nets of the dragnet are connected to each otter board via an otter penent, a hand rope, and a net penetrator. ing. In order to adjust the spread width of the net mouth, it is necessary to change the angle of attack of water on the otter board and adjust the strength of the received water flow. For that purpose, fishing gear must be lifted and the bracket angle and otter board penents must be adjusted.

[0003]

[Problems to be solved by the device]

 However, the conventional otter board has a large shape and heavy weight, which makes it difficult to lift and lower the otter board to adjust the spread width of the net mouth. The adjustment work was also extremely difficult and required maturation.

The present invention has been made in view of these points, and it is possible to appropriately adjust the widening width of the net opening of the dragnet by a simple operation according to the purpose of the fishery, and reduce the fuel consumption of the ship. The purpose is to provide a lightweight otter board that can be handled and is easy to handle.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the otter board according to the present invention is an otter board formed by a multi-leaf board member, wherein at least the outermost board of the multi-leaf board members. The member is formed of a flexible member.

Further, the otter board according to the second aspect of the present invention is characterized in that the flexible member is formed so that the expansion width can be adjusted.

[0007]

[Action]

 According to the otter board of the present invention as set forth in claim 1, since at least the outermost board member of the multi-leaf board members is formed of a flexible member, the weight of the entire otter board is reduced.

According to the otter board of the present invention as set forth in claim 2, a board member made of a flexible member which is wound in a roll shape and accommodated is fed out by a required length, or an accordion curtain shape. Similarly, by stretching the board member for the required length and fixing the end of the board member to open and close it in a board shape, the strength of the received water flow is adjusted, and the net spreading force of the otter board as a whole is changed. As a result, the expansion width of the mesh opening of the dragnet is adjusted.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS.

1 to 4 show an embodiment of the present invention in which an otter board is formed in a multi-leaf structure.

The otter board 1 of this embodiment is formed in a compound leaf having two board members 2, 2 on the outer side and the inner side. Each board member 2, 2 is formed of two board members 2a, 2b, 2c, 2d, an upper part and a lower part, respectively. Of these, the inner board members 2c and 2d are made of light metal such as aluminum and are curved so that the inner surface is recessed, and the outer board members 2a and 2b are flexible such as canvas, cloth, sheets and the like. It is formed of a flexible member. More specifically, the otter board 1 is firmly fixed and connected by the pillar members 5a, 5b, 5c and 5d in which the stepping member 3 and the top plate 6 are arranged at the four corners. Two intermediate connecting members 4a and 4b are fixed in parallel to the horizontal direction at the intermediate height positions of the pillar members 5a, 5b, 5c and 5d. Intermediate blind members 4c and 4c, which are curved like the respective board members, are fixed between the widthwise end edges of the intermediate connecting members 4a and 4b. And four board members 2a, 2b, 2c and 2d are arranged on the upper and lower portions of each intermediate blind member 4c. The outer board members 2a, 2b made of a flexible material are arranged between the pillar members 5a, 5b so that the expansion width can be adjusted. Explaining one outer board member 2a, the outer front pillar member 5a is hollow, and a winding shaft 9 around which the outer board member 2a is wound is rotatably mounted inside. In addition, a long hole 7 is formed in the rear surface portion of the pillar member 5a as an unwinding opening for the outer board member 2a. The outer board member 2a is formed by fixing an end portion 8a of a flexible member of an appropriate size to an appropriate position of the winding shaft 9 and forming a loop portion of the other end portion 8b fed from the elongated hole 7. A rod-shaped fixture 10 serving as a stopper at the time of winding or opening / closing is inserted. This fixing tool 10 is longer than the long hole 7, and through holes 12 are formed in the upper and lower ends of the fixing tool 10 so that a locking tool 11 such as a bolt or a nut for fixing the outer board member 2a in an open / closed state is inserted. .. At the outer ends of the foot member 3, the top plate 6 and the intermediate connecting members 4a and 4b arranged horizontally, the outer board members 2a and 2b are projected outward and curved so as to bend. A U-shaped guide rail 13 is provided. The lateral wall 13a of each guide rail 13 is also provided with a through hole 12 through which a fastener 11 such as a bolt or a nut for fixing the fastener 10 inserted through the outer board member 2a is inserted at an appropriate interval. Has been drilled. Further, the stepping member 3 is curved forward at the front. A stopper 14 for blocking the rotation of the winding shaft 9 is provided on the upper portion of the pillar member 5a as required, and the widthwise central portion of the front end portions of the two intermediate connecting members 4a and 4b is provided. In this case, a warp connecting member 15 for connecting the warp fed from the ship is rotatable about a vertical axis.

Next, the operation of this embodiment will be described.

The otter board 1 in the present embodiment changes the area of the board members 2a, 2b that receive the water flow by adjusting the expansion width of the outer board members 2a, 2b as the net expansion force adjusting means. I am trying to adjust the resistance of.

In the present embodiment, the net expansion force of the otter board 1 increases in proportion to the expansion area of the outer board members 2a, 2b, and is freely adjusted between the maximum value and the minimum value. It

Therefore, in this embodiment, first, the board members 2a, 2b on the outside of the otter board 1 are unwound from the elongated hole 7 of the fixed shaft 5a on the ship, and guided to the guide rail 13 to the required width. Then, the through hole 12 of the fixing tool 10 and the through hole 12 of the guide rail 13 are aligned with each other, and the connecting tool 11 such as a bolt and a nut is used to connect the upper and lower parts to each other and extend the same. Further, at this point, the winding shaft 9 is also prevented from rotating by the stopper 14 to prevent further feeding of the board members 2a and 2b. In this state, the otter board 1 is cast in water together with the dragnet 20 as shown in FIG.

During this operation, the warp 16 fed from the ship is fixed to the warp connector 15 at the feeding end, and the otter board 1 has the otter pen 17, the hand rope 18, and the net pen 19. The drag net 20 is connected via the like. Then, each otter board 1 opens the net mouth of the dragnet 20 by the net-opening force according to the spread width of the outer board members 2a and 2b.

As described above, in the present embodiment, by adjusting the spreading width of the board members 2a and 2b, it is possible to extremely easily and freely change the net expanding force. Moreover, since the weight of the otter board 1 as a whole can be reduced by using a flexible member for a part of the board members, it is easy to unload it on the ship, work is safe and easy, and fuel efficiency of the ship is good. Become.

It should be noted that the present invention is not limited to the above-mentioned embodiment, but can be modified as necessary. In addition to the outer board members 2a and 2b, the inner board members 2c and 2d may be formed of flexible members. Further, the adjustment of the expansion width of the board member made of a flexible member is not limited to that in the above-mentioned embodiment, and the expansion width of the board member may be adjusted by using an accordion curtain, for example.

[0019]

[Effect of the device]

 As described above, since the otter board of the present invention is constructed and operates, it is possible to change the reticulation force by using at least a part of the flexible board member whose expansion width is adjustable. At the same time, the otter board is lighter and easier to handle. Moreover, the expansion width of the net opening of the dragnet can be appropriately adjusted according to the purpose of the fishery by simply adjusting the expansion width of the board member, and the fuel consumption of the ship can be reduced.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing an embodiment of an otter board of the present invention.

FIG. 2 is a partially enlarged view showing the configuration of an outer board member of an embodiment of the otter board of the present invention.

FIG. 3 is a partially enlarged view showing a guide rail portion of one embodiment of the otter board of the present invention.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is an explanatory view showing an operating state using the otter board of the present invention.

[Explanation of symbols]

 1 Otter board 2a, 2b Outer board member 2c, 2d Inner board member 4a, 4b Intermediate connecting member 9 Winding shaft 10 Fixture 13 Guide rail

Claims (2)

[Scope of utility model registration request] 1. An otter board formed of a multi-leaf board member, wherein at least the outermost board member of the multi-leaf board member is formed of a flexible member. 2. The otter board according to claim 1, wherein the flexible member is formed so that a spreading width can be adjusted.