JP2018186791A - Fish grabber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fish grabber that can grab a fish mouth by a simple operation.SOLUTION: A fish grabber includes a pair of grabbing teeth 2, 3 to be opened and closed in order to grab a fish mouth, and an operation member 4 capable of being moved between a first position and a second position. In the state where the operation member 4 is positioned in the first position, the pair of grabbing teeth 2, 3 is in an open state. In the state where the operation member 4 is positioned in the second position, the pair of grabbing teeth 2, 3 is in a closed state. A spring 7 is included in which a biasing direction is reversed by a halfway position between the first position and the second position in the operation member 4 as a boundary. In the first position side, the spring 7 applies the biasing force to the first position side for the operation member 4. In the second position side, the spring 7 applies the biasing force to the second position side for the operation member 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fish grasper for grasping a fish mouth.

  As a fish grasper for grasping the mouth of a fish that has been caught, for example, one disclosed in Patent Document 1 below is known. In the fish gripper, the spring urges the holding member in the opening direction, and grips the fish mouth by closing the holding member by gripping the grip portion of the holding member strongly against the urging force of the spring. be able to. And, by inserting a lock pin as a locking means, the closed state of the pinching member is maintained by the lock pin, and the pin is narrowed by the lock pin without having to hold the grip portion of the pinching member strongly by hand. The closed state of the holding member can be maintained. However, an operation of further inserting a lock pin in a state where the grip portion of the holding member is strongly held against the biasing force of the spring is necessary, and the operation is complicated.

  Similarly, the fish grabber described in Patent Document 2 below is configured so that the blade closes by gripping the rotating lever strongly against the biasing force of the spring. Then, when the lever is gripped against the urging force of the spring, the screw is rotated and screwed in, so that the closed state of the lever is maintained and the closed state of the blade can be maintained. However, also in this fish grabber, it is necessary to rotate and screw the screw in a state where the lever is firmly held against the biasing force of the spring, and the operation is complicated.

  On the other hand, in the fish grasper described in Patent Documents 3 and 4 below, the movable teeth are opened by pulling up the operation tool. In this fish grabber, the movable tooth is biased to the closing side by a spring, and the user pulls up the operation tool against the biasing force of the spring. Therefore, in order to maintain the movable tooth in the open state, the user needs to continue to pull up the operation tool against the biasing force of the spring. Since the fish you catch often go wild and do not open the mouth easily, it is not easy to grab the fish mouth with moving teeth instantly, but in such situations the user has a strong spring bias It is necessary to keep pulling the operation tool against this, and a great effort is required.

  Moreover, in the fish gripper described in Patent Document 5 below, a configuration is described in which a pair of holding members are opened by pushing the actuating member forward rather than pulling it backward. In this fish grabber, the operating member is urged rearward by a spring. Therefore, in order to maintain the holding member in the open state, it is necessary for the user to keep pushing the operating member against the biasing force of the spring, which is also accompanied by a great effort.

JP 2002-45098 A Japanese Utility Model Publication No. 5-78 JP 2008-283915 A JP 2010-4816 JP 2011-30539 A

  Therefore, an object of the present invention is to provide a fish gripper that can grip the mouth of a fish with a simple operation.

  The present invention has been made to solve the above-mentioned problems, and a fish grasper according to the present invention is a fish grasper for grasping a fish mouth, and at least one of them is a movable tooth and grasps the fish mouth. A pair of gripping teeth that open and close as much as possible and an operation member that can move between a first position and a second position, and the pair of gripping teeth are open when the operation member is located at the first position In the state where the operation member is located at the second position, the pair of gripping teeth are in the closed state, and the biasing direction is set at the middle position between the first position and the second position in the operation member. Is provided with a reversing spring, and on the first position side, the spring applies a biasing force to the operating member toward the first position side, and on the second position side, the spring is applied to the operating member in the second position. A biasing force to the side is applied.

  When changing the pair of gripping teeth from the open state to the closed state in the fish gripper having the above configuration, the user operates the operation member from the first position toward the second position. When the operating member is positioned on the first position side with respect to the midway position, the spring biases the operating member to the first position side. Therefore, the user operates the operation member to a midway position against the biasing force of the spring. When the operating member is positioned on the second position side beyond the midway position, the biasing direction of the spring is reversed, and the spring biases the operating member to the second position side. Therefore, when the operating member crosses the intermediate position to the second position side, the user does not need to operate the operating member with a strong force against the biasing force of the spring and move it to the second position side. There is no need to keep the operating member in the second position with a strong force. Conversely, when the pair of gripping teeth is opened from the closed state, the user operates the operation member from the second position toward the first position. Even in that case, the biasing direction of the spring is reversed at the middle position, so that the user operates the operation member against the biasing force of the spring up to the middle position. It is not necessary to move the first member to the first position by operating it with a strong force against the biasing force of the spring, and it is not necessary to keep the operating member in the first position with a strong force. In both cases of closing and opening the pair of gripping teeth, it is necessary for the user to operate the operating member to a midway position on his / her own intention. There is no need to close or open your gripping teeth.

  In particular, the spring is a torsion spring configured to change the opening angle between two arms, and the spring is disposed between two members that rotate relatively with the movement of the operation member, and Preferably, one arm is pivotally connected to one member and the second arm of the spring is pivotally connected to the other member. In this configuration, the spring can rotate with the connection portion between the first arm and one member as a fulcrum as the operation member moves, and the connection portion between the second arm and the other member. It can also rotate as a fulcrum. Therefore, the biasing direction can be easily reversed while rotating the spring at a midway position of the operation member.

  The pair of gripping teeth are provided at the front end, the operation member is located on the rear side with respect to the pair of gripping teeth, and the first position of the operation member is relatively on the front side and the second position. Is relatively on the rear side, and by pulling the operation member to the rear side, it is preferable that the operation member becomes the second position and the pair of gripping teeth are closed. As described above, when the pair of gripping teeth is closed by the operation of pulling the operating member rearward, the user's natural operation is compared with the configuration in which the pair of gripping teeth is closed by pressing the operating member forward. Closer to the senses and less uncomfortable. In addition, the pair of gripping teeth in the opened state does not start to close without permission by the biasing force of the spring, but the user starts to operate the operation member from the first position toward the second position. Since the gripping teeth begin to close, the intention of the user is surely reflected. That is, in a configuration in which the pair of gripping teeth is forcibly closed by the biasing force of the spring, the pair of gripping teeth is automatically closed by the biasing force of the spring when the user releases the hand from the operation member. . For this reason, for example, when the user's hand slips, the pair of gripping teeth may unexpectedly close and fail to grasp the fish mouth. On the other hand, since the pair of gripping teeth is closed by the user pulling the operation member to the rear side, the pair of gripping teeth can be closed based on the intention of the user, and the fish mouth Can be grasped reliably.

  In addition, a grip portion is provided on the rear side of the operation member. The operation member is operated by a finger holding portion that can be pulled by a finger that holds the grip portion, and a push operation by a finger that holds the grip portion. It is preferable to include a pushing portion that can perform the pulling operation, and a pulling operation and a pushing operation can be performed with a hand holding the holding portion, and a one-hand operation is sufficient.

  In particular, when the index finger of the hand holding the gripping part is pulled backward with the index finger of the hand holding the gripping part and the pushing part is pressed forward with the thumb of the hand gripping the gripping part, the index finger of the hand holding the gripping part Each of the pulling operation and the pressing operation can be easily performed with the thumb, and the operability is further improved.

  In addition, a transmission mechanism that interlocks the opening / closing operation of the pair of grip teeth and the movement operation of the operation member is provided, and in a state where the operation member is positioned at the second position, the pair of grip teeth is restricted from moving in the opening direction, It is preferable that the movement restriction of the pair of gripping teeth in the opening direction is canceled by operating the operating member toward the first position, and the fish mouth can be reliably held even if the fish goes wild.

  Particularly, the operation member constitutes a link mechanism, and the link mechanism is an approximate linear motion mechanism of a four-bar linkage mechanism, and the operation member performs an approximate linear motion between a first position and a second position. Preferably, the operation member can be operated more smoothly.

  As described above, since the biasing direction of the spring is reversed at a midway position between the first position and the second position in the operation member, the user can force the operation member to the first position or the second position with a strong force. There is no need to keep it in the position. Therefore, the fish mouth can be grasped by a simple operation.

The front view which shows the open state of the fish grasper in 1st embodiment of this invention. The front view which shows the halfway state of the fish grasper. The front view which shows the closed state of the fish grabber. The front view which shows the state which mounted the same fish grabber. The perspective view which shows the spring used for the fish grasper. The front view which shows the open state of the fish grasper in 2nd embodiment of this invention. The front view which shows the halfway state of the fish grasper. The front view which shows the closed state of the fish grabber. The principal part front view which shows the closed state of the fish grasper in 3rd embodiment of this invention. It is a principal part front view which shows the closed state of the same fish grabber, Comprising: The state in the middle of moving the operation member from the 2nd position to the 1st position side is shown. It is a principal part front view which shows the closed state of the same fish grabber, Comprising: The state in the middle of moving the operation member from the 2nd position to the 1st position side is shown. The front view which shows the open state of the fish grasper. The front view which shows the open state of the fish grasper in 4th embodiment of this invention. The front view which shows the closed state of the fish grabber.

<First embodiment>
Hereinafter, a fish grasper according to a first embodiment of the present invention will be described with reference to FIGS. The fish gripper in the present embodiment includes a main body 1, a pair of gripping teeth 2 and 3 for gripping a fish mouth, an operation member 4 provided to be movable with respect to the main body 1, and the main body 1 and the operation member 4. Are respectively provided with a swing cam 5 and a rear link 6 which are rotatably connected to each other, and a pair of gripping teeth 2 and 3 and a spring 7 which applies a biasing force to the operation member 4. The operation member 4 is operated to open and close the pair of gripping teeth 2 and 3, and the operation member 4 and the pair of gripping teeth 2 and 3 are interlocked by a transmission mechanism. In this embodiment, the transmission mechanism is It consists of a cam mechanism and a link mechanism.

  The fish gripper grips the mouth of the fish with a pair of gripping teeth 2 and 3 provided at the front end, and grips the lower jaw or upper jaw of the fish mouth with the pair of gripping teeth 2 and 3. 1 shows a state in which the pair of gripping teeth 2 and 3 are maximally opened, that is, an open state, FIG. 3 shows a state in which the pair of gripping teeth 2 and 3 are closed, that is, a closed state, and FIG. The boundary state when the urging direction of the spring 7 to be described later is reversed is shown in the middle state between.

  The fish grabber has a main body 1 that is long in the front-rear direction as a whole. A pair of gripping teeth 2 and 3 are provided at the front end of the main body 1 and a gripping part 12 is provided at the rear end. Yes. The longitudinal direction of the main body 1 is the front-rear direction, the side where the pair of gripping teeth 2 and 3 are located is the front side, and the side where the grip portion 12 is located is the rear side. In addition, the opening / closing direction of the pair of gripping teeth 2, 3 is the vertical direction, and the normal direction is the left-right direction with respect to the surface on which the pair of gripping teeth 2, 3 opens and closes. The pair of gripping teeth 2 and 3 may be movable teeth configured such that both of them are movable, but in the present embodiment, only one of them is a movable tooth and the other is configured as a fixed tooth that is not movable. That is, one gripping tooth is a movable tooth that is movable with respect to the main body 1, and the other gripping tooth is a fixed tooth that is fixed without being movable with respect to the main body 1. The following description will be made with the fixed tooth side as the upper side and the movable tooth side as the lower side.

<Upper gripping tooth 2>
An upper gripping tooth 2 that is a fixed tooth is provided at the upper part of the front end portion of the main body 1. The upper gripping teeth 2 may be configured separately from the main body 1 and attached to the main body 1 with screws or the like, or may be configured integrally with the main body 1 as one member. In this embodiment, the latter structure, that is, a structure formed integrally with the main body 1 is adopted. The upper gripping tooth 2 has a shape curved upward from the base end portion (rear end portion) to the front end portion 2a (front end portion), and the front end portion 2a faces downward.

<Main unit 1>
The main body 1 includes a main part located at the center in the front-rear direction, an upper gripping tooth 2 extending from the main part to the front side, and a gripping part 12 extending from the main part to the rear side. The main part includes a front main part 10 having a large vertical dimension and a rear main part 11 having a vertical dimension smaller than that of the front main part 10. The upper surface of the front main part 10 and the upper surface of the rear main part 11 are smoothly continuous in the front-rear direction without a step. On the other hand, the lower surface of the rear main portion 11 is positioned one step above the lower surface of the front main portion 10, and as a result, the rear main portion 11 has a smaller vertical dimension than the front main portion 10. ing. The grip portion 12 extends from the rear main portion 11 toward the rear side. The upper surface of the grip portion 12 and the upper surface of the rear main portion 11 are smoothly continuous in the front-rear direction without a step, while the lower surface of the grip portion 12 is positioned one step below the lower surface of the rear main portion 11. Therefore, the grip portion 12 has a larger vertical dimension than the rear main portion 11. The grip portion 12 is inclined so as to be on the lower side toward the rear side. Moreover, it has the shape curved from the front main part 10 to the holding | grip part 12 at the upper convex as a whole.

<Lower gripping tooth 3>
The lower gripping tooth 3 that is a movable tooth is configured to rotate up and down with the first rotation support shaft 20 located on the base end side as a fulcrum. The first rotation support shaft 20 is fixedly attached to the main body 1. The first rotation support shaft 20 is located in the vicinity of the front end portion of the front main portion 10. The first rotation support shaft 20 is along the left-right direction, and therefore, the lower gripping tooth 3 is rotated up and down within a predetermined angle range around the left-right axis. Of the entire lower gripping tooth 3, a portion extending to the front side of the first rotation support shaft 20 is referred to as a tooth main portion 30. The main tooth portion 30 of the lower gripping tooth 3 is vertically symmetrical with the upper gripping tooth 2 and is curved downward from the proximal end portion to the distal end portion 3a. 3a faces upward.

  The tip 2a of the upper gripping tooth 2 and the tip 3a of the lower gripping tooth 3 are closed when the pair of gripping teeth 2 and 3 are closed, that is, the lower gripping tooth 3 rotates upward. In the state, they face each other and contact each other. In the closed state, the upper gripping teeth 2 and the lower gripping teeth 3 are in contact with each other only at the tip portions 2a and 3a, and the other portions are in a separated state. The lower surface of the distal end portion 2a of the upper gripping tooth 2 and the upper surface of the distal end portion 3a of the lower gripping tooth 3 are both flat, and are in contact with each other as upper and lower surfaces. In the closed state, the first rotation support shaft 20 is positioned on the same line as the contact portion where the tip portion 2a of the upper gripping tooth 2 and the tip portion 3a of the lower gripping tooth 3 are in contact in a front view. However, the lower surface of the distal end portion 2a of the upper gripping tooth 2 and the upper surface of the distal end portion 3a of the lower gripping tooth 3 may be curved surfaces curved in the front-rear direction instead of being flat. In any case, in the front view in the closed state as shown in FIG. 3, the abutment portion between the tip portions 2 a and 3 a of the upper gripping tooth 2 and the lower gripping tooth 3 and the first rotation support shaft 20. When a straight line connecting the center is defined as a reference line 8, the tooth main portions 30 of the upper gripping tooth 2 and the lower gripping tooth 3 with respect to the reference line 8 are substantially symmetrical in the vertical direction. Note that a posture in which the reference line 8 is horizontal in the front-rear direction is defined as a reference posture. Protrusions project from the tip 2a of the upper gripping tooth 2 and the tip 3a of the lower gripping tooth 3 in the form of hooks toward the rear, respectively. The tip 3a of the side gripping tooth 3 has a shape that is easily caught on the jaw of the fish mouth. The lower gripping tooth 3 opens from the closed state toward the lower side, and its angle is, for example, 30 to 90 degrees.

  A follower portion 31 protrudes toward the rear side on the bottom surface of the main tooth portion 30 of the lower gripping tooth 3. The follower portion 31 protrudes substantially horizontally toward the rear side in the closed state as shown in FIG. 3, and is positioned substantially below the first rotation support shaft 20 in the closed state. The follower portion 31 has a cylindrical shape having an axis in the left-right direction, and therefore, the front end surface (rear end surface) is a peripheral surface having a center line along the left-right direction and rotating at a predetermined angle. Further, the lower gripping tooth 3 includes an extending arm portion 32 extending from the first rotating support shaft 20 toward the rear side. The extending arm portion 32 extends while curving so as to bulge upward from the first rotating support shaft 20 toward the rear side. Further, a stopper projection 33 projecting from the rear end portion of the extending arm portion 32 while being inclined downward and forward is provided.

  A second rotation support shaft 21 is provided at a position away from the first rotation support shaft 20 on the rear side and the lower side. Similarly to the first rotation support shaft 20, the second rotation support shaft 21 is attached and fixed to the main body 1 and has an axis in the left-right direction. A bulging portion 13 bulges downward from the front lower surface of the front main portion 10 of the main body 1, and a second rotating support shaft 21 is fixedly attached to the bulging portion 13. .

<Oscillating cam 5>
The swing cam 5 is rotatably supported on the second rotation support shaft 21. The swing cam 5 is a constituent member constituting a link mechanism, and functions as a first link. The swing cam 5 rotates within a predetermined angle range with the second rotation support shaft 21 as a fulcrum. The swing cam 5 includes a cam portion 50 and a link portion 51. In the closed state, the cam portion 50 is located on the front side, the link portion 51 is located on the rear side, and the cam portion 50 and the link portion 51 are located on the opposite sides of about 180 degrees.

  The cam portion 50 as a whole is a thin or thick plate with the left-right direction being the plate thickness direction, and the second pivotal support shaft 21 is the center of rotation of the cam at the front portion of the peripheral surface. A cam surface as a plate cam is formed. The follower portion 31 of the lower gripping tooth 3 comes into contact with the cam surface. Since the lower gripping teeth 3 are constantly urged in the opening direction by the spring 7, the follower portion 31 is always in contact with the cam surface. A straight line connecting the contact point between the cam surface and the follower part 31 and the first rotation support shaft 20 and a straight line connecting the contact point between the cam surface and the follower part 31 and the second rotation support shaft 21 are provided. The angle between them is a right angle or an angle close to a right angle, and is an angle such that the swing cam 5 does not substantially rotate due to the force of the follower portion 31 pushing the cam surface.

  The cam surface has a first cam surface 52 and a second cam surface 53 centered on the second rotation support shaft 21. The first cam surface 52 has a relatively small radius and is concave, and the second cam surface 53 has a relatively large radius and is convex. In the front view as shown in FIG. 3, the first cam surface 52 is positioned on the lower side of the second rotation support shaft 21, and the second cam surface 53 is positioned on the front side of the second rotation support shaft 21. The first cam surface 52 is a region in which the radius suddenly decreases with respect to the second cam surface 53, and the follower portion 31 is engaged in the open state as shown in FIG. Accordingly, the first cam surface 52 has a concave shape that engages with the follower portion 31 and the follower portion 31 has a convex shape that engages with the first cam surface 52. The follower portion 31 contacts the second cam surface 53 in the closed state as shown in FIG. The second cam surface 53 has a shape in which the radius gradually increases clockwise. In the boundary state as shown in FIG. 2, the follower portion 31 contacts the boundary portion between the first cam surface 52 and the second cam surface 53.

  A top portion 54 having a suddenly increased radius is formed on the second cam surface 53 in the clockwise advance side. In the open state as shown in FIG. 1, the distal end portion of the stopper projection 33 of the lower gripping tooth 3 faces the outer side in the radial direction of the apex portion 54 with a slight distance therebetween. When an external force acting on the lower gripping tooth 3 acts on the lower gripping tooth 3 in the open state as shown in FIG. 1, only the lower gripping tooth 3 rotates slightly clockwise with the first pivotal support shaft 20 as a fulcrum. However, when the tip of the stopper projection 33 of the lower gripping tooth 3 is brought into contact with the top 54 of the swing cam 5, if it is rotated at a slight angle, it is more than that of the lower gripping tooth 3. The rotation to the closing side is prevented. In the closed state as shown in FIG. 3, the tip end portion of the stopper projection 33 of the lower gripping tooth 3 abuts against the side surface of the swing cam 5 or confronts it through a slight gap.

  The link portion 51 of the swing cam 5 has a narrow width and extends radially outward from the second rotation support shaft 21. The link portion 51 extends toward the rear side in a state where the link portion 51 is slightly inclined with respect to the second rotation support shaft 21 in the closed state.

<Operation member 4>
The operation member 4 is rotatably connected to the swing cam 5 via the first connection support shaft 22. Specifically, the front end portion 2 a of the link portion 51 of the swing cam 5 and the front end portion of the operation member 4 are connected to each other via the first connection support shaft 22 so as to be rotatable. The first connecting support shaft 22 has a horizontal axis similar to the first rotating support shaft 20 and the second rotating support shaft 21. The operation member 4 is a constituent member that constitutes a link mechanism, and functions as a second link. In the open state as shown in FIG. 1, the operating member 4 is located at the first position, which is the frontmost position in the moving range, and in the closed state as shown in FIG. It is located at the second position which is the position of. The operation member 4 is movable back and forth between the first position and the second position with respect to the main body 1.

  The operation member 4 is L-shaped as a whole in a front view as shown in FIG. 3, and includes a connecting arm portion 40 extending in the front-rear direction and a rear end portion of the connecting arm portion 40. And an operating portion 41 that bends and extends substantially perpendicularly to the upper side with respect to the rear end portion of the portion 40. The connecting arm portion 40 is located on the lower side of the main body 1. The front end portion of the connecting arm portion 40 is rotatably connected to the tip end portion of the link portion 51 by the first connecting support shaft 22. Although not shown in the drawings, the front end portion of the connecting arm portion 40 is preferably bifurcated to the left and right, and the front end portion of the link portion 51 is located between the left and right sides. preferable.

  A finger ring portion 43 in which a finger hooking hole 42 is formed is provided under the operation portion 41 as a finger hooking portion. An index finger can be inserted into the finger hooking hole 42 of the finger ring portion 43, and the operation member 4 can be pulled and operated rearward. The finger hooking hole 42 is located below the rear main portion 11, so that the finger inserted into the finger hooking hole 42 does not interfere with the rear main portion 11. A lower portion of the finger ring portion 43, that is, a lower end portion of the operation portion 41 bulges below the connecting arm portion 40.

  An upper extending portion 44 is provided on the upper portion of the operation portion 41. The upward extending portion 44 extends from the upper portion of the finger ring portion 43 toward the upper side. The upper extending portion 44 has a tapered shape in which the dimension in the front-rear direction gradually decreases toward the upper side, but may extend upward with a constant dimension. The upper part of the operation part 41, that is, the upper part of the upper extension part 44 protrudes above the upper surface of the rear main part 11, and pushes the protrusion 45 of the operation part 41 protruding upward from the rear main part 11 to the front side. Can be operated. Specifically, the rear surface 45a of the protruding portion 45 can be pushed forward with the thumb, and in this embodiment, the rear surface 45a of the protruding portion 45 is configured as a pressing portion.

<Back link 6>
The rear link 6 is rotatably connected to the operation member 4 via the second connection support shaft 23. Specifically, the lower end portion of the rear link 6 and the rear end portion of the connection arm portion 40 of the operation member 4 are connected to each other via the second connection support shaft 23 so as to be rotatable. The second connecting support shaft 23 has a horizontal axis. The operation portion 41 of the operation member 4 is a portion extended to the rear side of the second connecting support shaft 23. The rear link 6 is a constituent member that constitutes a link mechanism, and functions as a third link. The rear link 6 is rotatably connected to the main body 1 with the third rotation support shaft 24 as a fulcrum at the upper end portion thereof. The main body 1 is a constituent member constituting a link mechanism, and functions as a fourth link. The third rotation support shaft 24 is also attached and fixed to the main body 1 along the left-right direction. Specifically, the third rotation support shaft 24 is located in the vicinity of the rear end portion of the front main portion 10 of the main body 1, and It is located slightly below the moving support shaft 20. The rear link 6 rotates within a predetermined angle range so as to swing back and forth with the third rotation support shaft 24 as a fulcrum, and in the closed state as shown in FIG. In the open state as shown in FIG. In the closed state, the rear link 6 is inclined to the rear at a small angle with respect to the vertical posture along the vertical direction, and in the open state, the posture is inclined to the front side at a small angle with respect to the vertical posture along the vertical direction. It becomes.

<Four-link mechanism>
Thus, the first rotation support shaft 20, the second rotation support shaft 21, the third rotation support shaft 24, the first connection support shaft 22, and the second connection support shaft 23 are all in the left-right direction. The axes are parallel to each other. Accordingly, the main body 1, the lower gripping teeth 3, the swing cam 5, the rear link 6, and the operation member 4 are all relatively rotated on the same plane around the axis in the left-right direction. The main body 1, the swing cam 5, the rear link 6 and the operation member 4 constitute a four-bar linkage mechanism. The four-bar linkage mechanism is an approximate linear motion mechanism, and when the operation member 4 moves between the first position and the second position, the operation portion 41 of the operation member 4 performs approximate linear motion. The distance between the first rotation support shaft 20 and the first connection support shaft 22 is smaller than the distance between the second rotation support shaft 21 and the second connection support shaft 23. In order to link the opening / closing operation of the lower gripping tooth 3 and the moving operation of the operation member 4 by the four-bar linkage mechanism and the cam mechanism composed of the cam surface of the swing cam 5 and the follower portion 31. The transmission mechanism is configured.

<Spring 7>
A spring 7 is arranged between the lower gripping tooth 3 and the swing cam 5. As shown in FIG. 5, the spring 7 is a torsion spring and includes two arms 71 and 72 extending from the cylindrical portion 70, and an opening angle (arm angle) between the two arms 71 and 72 is set. It is a compression type spring that exerts the urging force of the spring 7 by making it small. That is, the direction in which the arm angle decreases is the compression direction. The urging force of the spring 7 acts in the extending direction of a straight line connecting the distal end portion 71a of the first arm 71 and the distal end portion 72a of the second arm 72. The first arm 71 extends in the tangential direction from one end of the cylindrical portion 70, the second arm 72 extends in the tangential direction from the other end of the cylindrical portion 70, and the respective distal end portions 71a and 72a are cylindrical portions. They are bent at substantially right angles in opposite directions toward the center line of 70. In this embodiment, the spring 7 is a right-handed type, but may be a left-handed type. The spring 7 is arranged so that the center line of the cylindrical portion 70 is in the left-right direction. Accordingly, the cylindrical portion 70 of the spring 7 and the first rotation support shaft 20 are in a substantially parallel relationship. The cylindrical portion 70 of the spring 7 is interposed between the main body 1 and the cam portion 50 of the swing cam 5.

  The arm angle of the spring 7 is 90 degrees to 180 degrees in the free state, and is 135 degrees in the present embodiment. In the closed state as shown in FIG. 3, the arm angle of the spring 7 is approximately 90 degrees, and in the open state as shown in FIG. 1, the arm angle of the spring 7 is approximately 100 degrees, both of which are in a compressed state. In the boundary state as shown in FIG. 2, the arm angle of the spring 7 is about 70 degrees, which is the smallest and most compressed state.

  In the closed state of FIG. 3, the first arm 71 extends forward and upward from the cylindrical portion 70, and its tip is bent to the far side in the left-right direction, and the second arm 72 is downward from the cylindrical portion 70. It extends to the front and the front, and its tip is bent to the front side in the left-right direction. The distal end portion 71a of the first arm 71 is inserted into a connecting hole 34 formed in the extending arm portion 32 of the lower gripping tooth 3 and can be turned around the connecting hole 34 as a fulcrum. The distal end portion 72 a of the second arm 72 is inserted into a connecting hole 55 formed in the cam portion 50 of the swing cam 5 and can be rotated with the connecting hole 55 as a fulcrum. More specifically, the connection hole 34 of the lower gripping tooth 3 is formed so as to penetrate along the left-right direction in the vicinity of the proximal end portion of the extending arm portion 32, that is, the first rotation support shaft 20. The connection hole 55 of the swing cam 5 is formed so as to penetrate along the left-right direction on a straight extension line connecting the second rotation support shaft 21 and the first connection support shaft 22. Accordingly, the connecting hole 55 of the swing cam 5, the second rotating support shaft 21, and the first connecting support shaft 22 are positioned in a straight line. Further, since the distal end portion 71a of the first arm 71 is rotatably supported by the connecting hole 34 of the lower gripping tooth 3, the spring 7 is lowered with the connecting hole 34 of the lower gripping tooth 3 as a fulcrum. It can rotate relative to the side gripping teeth 3. Similarly, since the distal end portion 72a of the second arm 72 is rotatably supported by the connection hole 55 of the swing cam 5, the spring 7 uses the connection hole 55 of the swing cam 5 as a supporting point. Is relatively rotatable.

  Since the spring 7 is disposed in a compressed state, the lower gripping tooth 3 is always urged in the opening direction regardless of the closed state or the open state. Therefore, the follower portion 31 of the lower gripping tooth 3 is always pressed against the cam surface of the swing cam 5 by the biasing force of the spring 7. On the other hand, the spring 7 also applies a rotational force to the swing cam 5. The spring 7 biases the swing cam 5 counterclockwise in the closed state shown in FIG. Accordingly, in the closed state, the operation member 4 is biased to the second position side by the spring 7 via the swing cam 5. In the open state shown in FIG. 1, the spring 7 urges the swing cam 5 clockwise. Accordingly, in the open state, the operation member 4 is biased to the first position side by the spring 7 via the swing cam 5. In the boundary state shown in FIG. 2, the distal end portion 71 a (connection hole 34) of the first arm 71, the distal end portion 72 a (connection hole 55) of the second arm 72, the second rotation support shaft 21, One connecting support shaft 22 is in a state of being aligned in a straight line. Therefore, in the boundary state, the spring 7 pushes the swing cam 5 toward the second rotation support shaft 21 and does not apply a rotational force to the swing cam 5. Therefore, in the boundary state, the operating member 4 is not biased by the spring 7 to either the first position side or the second position side. In this way, the direction in which the operating member 4 is urged from the spring 7 via the swing cam 5 is reversed with the boundary state of FIG.

<Use state>
Next, the use of the fish grabber will be described. In the open state as shown in FIG. 1, the operation member 4 is located at the first position which is the front position. The spring 7 biases the swing cam 5 clockwise, and the operation member 4 connected to the swing cam 5 is biased forward. Therefore, even if the operation member 4 is released, the operation member 4 remains in the first position and does not move to the second position side. Further, since the lower gripping teeth 3 are biased in the opening direction by the springs 7, even when the hand is released from the operation member 4, the pair of gripping teeth 2 and 3 are maintained in the open state. Yes. In such an open state, the grasping portion 12 is grasped with, for example, the right hand, the upper gripping teeth 2 are inserted into the mouth of the fish and positioned inside the lower jaw, and the lower gripping teeth 3 are positioned outside the lower jaw. .

  To close the pair of gripping teeth 2 and 3, when the grip portion 12 is gripped with the right hand, the index finger of the right hand is inserted into the finger-holding hole 42 and the operation member 4 is pulled forward. To do. That is, the operation member 4 is moved from the first position side toward the second position side. Until the operation member 4 is pulled from the first position in FIG. 1 to the middle position in FIG. 2, the swing cam 5 receives a clockwise biasing force by the spring 7, and the operation member 4 is in the first position side. Therefore, the operating member 4 is pulled from the first position to the middle position against the urging force of the spring 7. By pulling the operation member 4 from the first position to the middle position, the follower portion 31 is pushed by the cam surface of the swing cam 5, and the lower gripping tooth 3 is against the urging force of the spring 7 in the closing direction. It turns. As the operating member 4 moves from the first position to the middle position in this way, the swing cam 5 rotates counterclockwise, and the lower gripping tooth 3 rotates in the closing direction. Therefore, while the operation member 4 moves from the first position to the middle position, the distance between the connection hole 34 of the lower gripping tooth 3 and the connection hole 55 of the swing cam 5 gradually decreases, and the spring The arm angle of 7 gradually decreases, and the spring 7 is compressed. In addition, when the operating member 4 moves from the first position to the middle position, the lower gripping tooth 3 rotates in the closing direction beyond half of the allowable rotation range.

  When the operating member 4 is pulled and moved halfway, the boundary state shown in FIG. 2 is obtained. When the operation member 4 is slightly moved from the midway position to the second position side, the spring 7 starts to urge the swing cam 5 counterclockwise. Accordingly, it is not necessary to pull the operation member 4 beyond the midway position, the swing cam 5 is automatically rotated counterclockwise by the biasing force of the spring 7, and the operation member 4 is automatically moved to the rear side. Move to. Therefore, the user only needs to pull the operation member 4 from the first position to the middle position, and thereafter does not need to perform the pulling operation. However, the user may assist the movement of the operation member 4 to the second position side by pulling the operation member 4 with a light force.

  As the swing cam 5 rotates counterclockwise, the follower portion 31 slides on the second cam surface 53 of the swing cam 5, and the radius of the second cam surface 53 gradually increases. The lower gripping teeth 3 rotate in the closing direction against the urging force of the spring 7 to be in the closed state as shown in FIG. Further, when the swing cam 5 rotates counterclockwise, the operation member 4 automatically moves to the second position. Thus, by pulling the operating member 4 to the middle position, the pair of gripping teeth 2 and 3 are automatically closed, and the pair of gripping teeth 2 and 3 can pinch the lower jaw of the fish mouth.

  The closed state in FIG. 3 is a state in which, for example, the lower jaw of the fish mouth is grasped. Even if the lower gripping tooth 3 tries to rotate in the opening direction in the closed state, the follower portion 31 of the lower gripping tooth 3 moves the second cam surface 53 of the swing cam 5 over the second rotating support shaft 21. The follower portion 31 of the lower gripping tooth 3 and the second cam surface 53 of the swing cam 5 are in a state of being stretched with each other, and the lower gripping tooth 3 is opened. Cannot rotate in the direction. Therefore, even if the fish goes wild while holding the fish mouth, the lower gripping teeth 3 do not rotate and the pair of gripping teeth 2 and 3 remain closed. Therefore, the user does not need to keep pulling the operation member 4 and no locking means such as a lock pin is required. Further, since the swing cam 5 is given a counterclockwise rotational force by the spring 7, the operation member 4 is also biased to the second position side, and the operation member 4 is contrary to the user's intention. It will never move forward and will continue to be in the second position.

  When the fish gripper in the closed state is placed on a horizontal place as shown in FIG. 4, the placement surface 100 is grounded at two places on the front and rear. The ground contact point on the front side is the lower gripping tooth 3, and the ground contact point on the rear side is the rear end portion of the grip portion 12. When the ground surface is grounded at two places on the mounting surface 100, the fish gripper has a shape curved upward as a whole, and the operation member 4 is separated from the mounting surface 100 upward. Therefore, it is difficult for other members to hit the operation member 4, and the closed state is maintained.

  When shifting from the closed state of FIG. 3 to the open state of FIG. 1, that is, when releasing the fish from a state in which the fish mouth is gripped by the pair of gripping teeth 2, 3, The rear surface 45a of the protrusion 45 of the operation member 4 is pushed forward with the thumb. The operating member 4 is pushed and advanced from the second position to the middle position. During this time, the swing cam 5 receives a counterclockwise biasing force by the spring 7 and the operating member 4 is biased to the second position side. Therefore, the operating member 4 is pushed from the second position to the middle position against the urging force of the spring 7.

  By pushing the operating member 4 forward from the second position, the rotation restriction of the lower gripping tooth 3 is released, and the lower gripping tooth 3 is rotated in the opening direction by the biasing force of the spring 7. . Then, when the operating member 4 crosses the middle position to the front side, the spring 7 starts to urge the swing cam 5 clockwise, and thereafter the swing cam 5 automatically rotates clockwise to operate the operation member. 4 automatically reaches the first position. Also in this case, the operation member 4 may be lightly pressed with a thumb.

  In the open state of FIG. 1, the spring 7 applies a clockwise biasing force to the swing cam 5 and the operating member 4 is biased to the first position side. Therefore, even if the hand is released from the operation member 4, the operation member 4 continues to be positioned at the first position. Therefore, the user does not need to keep pushing the operating member 4 forward to maintain the open state, and can easily remove the pair of gripping teeth 2 and 3 from the fish mouth. Also, the pair of gripping teeth 2 and 3 can be left open as they are, and even when the upper gripping tooth 2 is inserted into the mouth of the next fish that has been picked up, it is not necessary to continue to push the operating member 4 forward. I can concentrate on my work.

  As described above, the biasing direction of the spring 7 is reversed from the first position side to the second position side at the midway position between the first position and the second position of the operation member 4. Therefore, it is not necessary for the user to move the operation member 4 against the urging force of the spring 7 in the entire section from the first position to the second position. Since the biasing direction of the spring 7 is reversed from the middle position and the force required for the operation is unnecessary or reduced, the operation can be performed easily. In addition, it is not necessary for the user to keep holding the operation member 4 at the first position or the second position against the biasing force of the spring 7, and the user can release his / her hand from the operation member 4. Thus, the user is released from holding the operation member 4 at the first position or the second position. Further, in order to open or close the pair of gripping teeth 2 and 3, the user needs to operate the operation member 4 to the middle position by his / her own intention. On the contrary, the spring 7 does not arbitrarily close or open the pair of gripping teeth 2 and 3, and the certainty of the operation is ensured. In particular, the effect is great in situations where the hands are wet and slippery at fishing sites or in dark conditions.

  Moreover, since the spring 7 is a torsion spring, it is easy to arrange between the relatively rotating members, and the urging direction can be smoothly reversed. In particular, since the tip 71a of the first arm 71 and the tip 72a of the second arm 72 of the spring 7 are rotatably connected to the lower gripping tooth 3 and the swing cam 5, respectively. However, the first arm 71 can be turned around the tip 71a of the first arm 71 and the tip 72a of the second arm 72 as a fulcrum, so that a smooth reversing operation is possible. Further, a spring 7 is interposed between the lower gripping tooth 3 which is a movable tooth and the swing cam 5, and the spring 7 biases the lower gripping tooth 3 in the opening direction. Therefore, the operating member 4 can be urged by one spring 7 and the lower gripping tooth 3 can be urged.

  Further, since the closed state is obtained by pulling the operation member 4 forward, it is close to the feeling of operating a general scissors, and natural operation becomes possible. In addition, since the operation member 4 can be operated with the hand holding the holding part 12, one-handed operation is possible. In addition, since the operation member 4 can be pulled with the index finger of the hand holding the grip portion 12 and the operation member 4 can be pushed with the thumb of the same hand, the operation member 4 can be operated smoothly and easily. Thus, the pair of gripping teeth 2 and 3 can be opened and closed.

  Further, when the operation member 4 is the input side and the lower gripping tooth 3 is the output side, and the operation member 4 is located at the second position, the lower gripping tooth 3 is rotated in the opening direction. It is regulated. That is, even when an external force in the opening direction acts on the lower gripping tooth 3 in the closed state, the follower portion 31 of the lower gripping tooth 3 supports the second cam surface 53 of the swing cam 5 on the second rotational support. By pushing toward the shaft 21 side, the lower gripping tooth 3 and the swing cam 5 are in a state of stretching each other, so that the lower gripping tooth 3 cannot rotate in the opening direction. Thus, unless the operation member 4 on the input side is operated, the lower gripping tooth 3 on the output side cannot rotate in the opening direction, and the rotation is restricted. Therefore, even if the fish goes wild, the pair of gripping teeth 2 and 3 reliably keeps holding the fish mouth. Only when the operation member 4 is operated toward the first position, the restriction of rotation of the lower gripping teeth 3 in the opening direction is released. That is, when the operation member 4 is operated toward the first position, the swing cam 5 is rotated clockwise, and when the swing cam 5 is rotated clockwise, the lower gripping tooth 3 is moved. It can be turned in the opening direction. For this reason, the lower gripping teeth 3 do not open without permission against the user's intention.

  In addition, since the operation member 4 is moved to the front side by the link mechanism, salting is less likely to occur compared to the conventional slide mechanism using a long hole, and the operation member 4 is smoothly and reliably moved. It becomes. In addition, since the link mechanism is an approximate linear motion mechanism and the operation unit 41 of the operation member 4 performs an approximate linear motion in the front-rear direction, the pulling operation and the push operation are performed linearly with the hand holding the grip unit 12. And the operation becomes even smoother.

<Second Embodiment>
In the first embodiment, the operation unit 41 of the operation member 4 is pressed with the thumb. However, the operation unit 41 may be pressed with another finger such as a middle finger. The fish gripper in 2nd embodiment is shown in FIGS. The description of the configuration common to the first embodiment is omitted. The fish gripper in the second embodiment has a different configuration of the operation unit 41 from the fish gripper of the first embodiment. 6 to 8 correspond to FIGS. 1 to 3, respectively. 6 to 8, the spring 7 is schematically shown. In the fish gripper in the second embodiment, the upper part of the operation part 41 does not protrude upward from the main body 1, and the entire operation part 41 is located below the rear main part 11 of the main body 1. A finger contact projection 46 is formed on the rear surface of the finger ring portion 43 so as to taper toward the rear side. The finger contact protrusion 46 is formed at the lower part of the rear surface of the finger ring portion 43, and the upper surface of the finger contact protrusion 46 and the rear surface of the finger ring portion 43 are pressed to perform a pressing operation with the finger of the hand holding the grip portion 12. It is configured as a part.

  In the closed state as shown in FIG. 8, with the index finger of the hand holding the holding part 12 in the finger hooking hole 42, the middle finger of the hand is placed on the rear surface of the finger ring part 43 and the upper surface of the finger contact projection 46. The operation unit 41 can be pushed and operated with the index finger and the middle finger in contact with each other. As described above, the shape of the operation unit 41 can be variously changed. Instead of providing the finger-holding hole 42 in the operation portion 41, for example, a trigger extending downward may be provided in the operation portion 41 so that the front surface of the trigger is configured as a finger-hanging portion and the rear surface of the trigger is configured as a pressing portion. Good. Further, in the configuration shown in FIGS. 6 to 8, the length of the rear link 6 is longer than the configuration shown in FIGS. 1 to 3. Thus, the locus | trajectory of the operation part 41 can be adjusted by changing the length of the back link 6 variously.

<Third embodiment>
9 to 12 show a fish grabber according to the third embodiment. 9 shows a state when the operation member 4 is located at the second position, FIG. 12 shows a state when the operation member 4 is located at the first position, and FIG. 10 shows the operation member 4. FIG. 11 shows a state where the operating member 4 is positioned between the first position and the second position, and FIG. 11 shows a state where the operation member 4 is positioned between the intermediate position and the first position. ing. The fish gripper of the third embodiment is different from the fish gripper of the first embodiment in the configuration of the lower gripping teeth 3, the swing cam 5, and the spring 7.

  In the third embodiment, a second follower portion 36 is formed at the distal end portion of the extending arm portion 32 of the lower gripping tooth 3. The cam portion 50 of the swing cam 5 extends in the radial direction as a whole from the second rotating support shaft 21 and enters between the follower portion 31 and the second follower portion 36 of the lower gripping tooth 3. It has a shape. The cam surface of the swing cam 5 is formed with a second cam surface 53 at the center in the circumferential direction, and a first cam surface 52 is formed in a counterclockwise position when viewed from the front centering on the second cam surface 53. A third cam surface 56 is formed at a clockwise position around the second cam surface 53 in a front view.

  The distal end portion 71a of the first arm 71 of the spring 7 and the distal end portion 72a of the second arm 72 are bent in the same direction and both face the back side in the left-right direction. The distal end portion 71 a of the first arm 71 of the spring 7 is inserted into a connecting hole 34 formed in the proximal end portion of the tooth main portion 30 of the lower gripping tooth 3, and the second arm 72 of the spring 7 is inserted. The distal end portion 72 a is inserted into a connection hole 55 formed in the vicinity of the third cam surface 56 of the swing cam 5. The connecting hole 55 of the swing cam 5, the second rotating support shaft 21, and the first connecting support shaft 22 are not positioned in a straight line, and the connecting hole 55 of the swing cam 5 is not connected to the second rotation shaft. The position is shifted counterclockwise in a front view with respect to a straight line extending between the moving support shaft 21 and the first connection support shaft 22. The spring 7 always urges the lower gripping teeth 3 in the closing direction.

  The operation of each part from the closed state in FIG. 9 to the open state in FIG. 12 will be described. In FIG. 9, the operation member 4 is located at the second position. The spring 7 urges the swing cam 5 counterclockwise. Therefore, the operation member 4 is urged to the second position side by the spring 7. The follower portion 31 of the lower gripping tooth 3 is in contact with the second cam surface 53 of the swing cam 5. Since the swing cam 5 is urged by the spring 7 to rotate counterclockwise, the follower portion 31 is pushed by the second cam surface 53 of the swing cam 5 and the lower gripping teeth 3 are closed. Is being energized. Even if an external force in the opening direction is applied to the lower gripping tooth 3, the follower portion 31 of the lower gripping tooth 3 causes the second cam surface 53 of the swing cam 5 to act as the second rotation support shaft 21. The follower portion 31 of the lower gripping tooth 3 and the second cam surface 53 of the swing cam 5 are stretched to each other, and the lower gripping tooth 3 opens in the opening direction. Can not rotate. That is, the lower gripping tooth 3 is in a state in which the rotation in the opening direction is restricted. The second follower portion 36 of the lower gripping tooth 3 is separated from the swing cam 5.

  When the lower gripping tooth 3 is opened from the state shown in FIG. 9, the operation member 4 is moved to the front side. FIG. 10 shows a state in which the operation member 4 is moved to the front side by a predetermined distance from the state of FIG. When the operating member 4 is pushed forward from the second position, the swing cam 5 rotates clockwise. Since the lower gripping tooth 3 is biased to the closing side by the spring 7, the second cam surface 53 of the swing cam 5 is separated from the follower portion 31. Accordingly, the rotation restriction of the lower gripping teeth 3 is released. However, since the spring 7 biases the lower gripping tooth 3 toward the closing side, the lower gripping tooth 3 maintains the closed state.

  The state of FIG. 10 is a state in which the operation member 4 is located at a midway position between the second position and the first position, and is a boundary state when the urging direction of the spring 7 is reversed. In FIG. 10, the spring 7 is in the most compressed state. The distal end portion 71a (connection hole 34) of the first arm 71, the distal end portion 72a (connection hole 55) of the second arm 72, and the second rotation support shaft 21 are positioned in a straight line. Therefore, in the boundary state, the spring 7 pushes the swing cam 5 toward the second rotation support shaft 21 and does not apply a rotational force to the swing cam 5. Therefore, in the boundary state, the operating member 4 is not biased by the spring 7 to either the first position side or the second position side. Even in the boundary state of FIG. 10, the second follower portion 36 of the lower gripping tooth 3 is separated from the swing cam 5. That is, the lower gripping teeth 3 and the swing cam 5 are completely separated from each other.

  The direction in which the operating member 4 is urged from the spring 7 via the swing cam 5 is reversed with the boundary state of FIG. That is, when the operating member 4 moves to the front side from the state of FIG. 10 and the swing cam 5 rotates clockwise, the spring 7 biases the swing cam 5 clockwise. As a result, the operation member 4 It will be biased toward the first position. When the rocking cam 5 rotates clockwise by a predetermined angle from the state shown in FIG. 10, the third cam surface 56 of the rocking cam 5 eventually falls below the second follower portion 36 of the lower gripping tooth 3 in the stopped state. Contact from the side. The state is shown in FIG. The state of FIG. 11 is a state in which the operating member 4 has moved to the first position side than the state of FIG. Since the oscillating cam 5 is urged clockwise by the spring 7, the urging force of the spring 7 causes the third cam surface 56 to push up the second follower portion 36 from the lower side, thereby lowering the gripping teeth on the lower side. 3 begins to open. The lower gripping tooth 3 is biased to the closing side from the first arm 71 of the spring 7, but the rotational force that the swing cam 5 pushes up the second follower portion 36 is larger. The lower gripping tooth 3 rotates counterclockwise around the first rotation support shaft 20 as a fulcrum.

  As the swing cam 5 is rotated clockwise by the biasing force of the spring 7, the second follower portion 36 is continuously pushed by the third cam surface 56, and the lower gripping teeth 3 are moved. Rotates counterclockwise. That is, the lower gripping tooth 3 rotates in the opening direction, and eventually becomes an open state as shown in FIG. In the state of FIG. 12, the operation member 4 is located at the first position, and the spring 7 biases the swing cam 5 in the clockwise direction. The spring 7 is biased toward the first position. Further, the follower portion 31 of the lower gripping tooth 3 is engaged with the first cam surface 52 of the swing cam 5, and the follower portion 31 is in contact with the first cam surface 52. Since the swing cam 5 is urged clockwise by the spring 7, the swing cam 5 tries to rotate clockwise. However, the second follower portion 36 is pushed up by the third cam surface 56 and the lower gripping teeth 3. Is trying to rotate counterclockwise. Therefore, the swing cam 5 is prevented from rotating by the lower gripping teeth 3 and cannot be rotated further clockwise.

  In the fish gripper in the third embodiment, the pair of gripping teeth 2 and 3 are maintained in the closed state even when the operation member 4 is moved from the second position to the position shown in FIG. Therefore, even if a hand accidentally touches the operation member 4 while the fish mouth is gripped and the operation member 4 is slightly pushed forward, the pair of gripping teeth 2 and 3 maintain the closed state. . Then, after the urging force of the spring 7 is reversed as shown in FIG. 11, the swing cam 5 starts to push the lower gripping tooth 3 to the open side.

  In addition, in the state of FIG.10 and FIG.11, since the rotation control of the lower gripping tooth 3 is cancelled | released, the lower gripping tooth 3 can be rotated in an opening direction. Therefore, when the opening side external force acts on the lower gripping tooth 3, the lower gripping tooth 3 rotates to the opening side, but the separation distance between the follower portion 31 and the second cam surface 53 is slight. When the follower portion 321 comes into contact with the second cam surface 53, the lower gripping tooth 3 cannot be rotated further to the opening side. Thus, although the lower gripping tooth 3 can be slightly rotated to the opening side, further rotation to the opening side is restricted by the swing cam 5.

<Fourth embodiment>
In addition, the transmission mechanism that links the opening / closing operation of the pair of gripping teeth 2 and 3 and the movement operation of the operation member 4 may be variously modified. In the above embodiment, the transmission mechanism includes a four-bar linkage mechanism and a cam mechanism. However, for example, a configuration including a rack and pinion as shown in FIGS. 13 and 14 may be used. 13 shows an open state corresponding to FIG. 1, and FIG. 14 shows a closed state corresponding to FIG.

  The main body 1 extends linearly along the front-rear direction. The lower gripping teeth 3 are formed in an L shape with the first rotation support shaft 20 as a bent portion, and are bent upward from the tooth main portion 30 extending forward and the rear end portion of the tooth main portion 30. And a drive arm portion 35 extending in the direction of the first rotation support shaft 20 provided in the vicinity of the bent portion. The drive arm portion 35 is shorter than the tooth main portion 30. The first rotation support shaft 20 is offset downward with respect to the center line of the pair of gripping teeth 2 and 3 in the closed state as shown in FIG. The pair of gripping teeth 2 and 3 are in a vertically symmetrical relationship with respect to the vertical center line (width direction center line) of the main body 1 in the closed state, and the tip portions 2a and 3a of the pair of gripping teeth 2 and 3 are Are located on the center line of the main body 1. The first rotation support shaft 20 is offset from the center line of the main body 1. Therefore, in the closed state, a component force toward the rear side acts on the distal end portion 3a of the lower gripping tooth 3, and the fish mouth can be pinched so as to be pulled toward the rear side.

  The front end portion of the drive link 80 is rotatably connected to the distal end portion of the drive arm portion 35 of the lower gripping tooth 3 via the first connection support shaft 22. The drive link 80 extends horizontally in the front-rear direction in the closed state as shown in FIG. The rear end portion of the drive link 80 is rotatably connected to the pinion gear 81 via the second connection support shaft 23. The pinion gear 81 is rotatably supported by the main body 1 by the second rotation support shaft 21. The second rotation spindle 21 is located on the center line of the main body 1. In the closed state of FIG. 14, the contact portion between the tip portions 2 a, 3 a of the pair of gripping teeth 2, 3, the first connection support shaft 22, the second connection support shaft 23, and the second rotation The support shafts 21 are arranged in a straight line in the front-rear direction and are located on the center line of the main body 1. In the closed state, a straight line connecting the first rotation support shaft 20 and the first connection support shaft 22 and a straight line connecting the first connection support shaft 22 and the second connection support shaft 23 are: It becomes a right angle relationship.

  The operation member 4 includes a rack 47 that meshes with the pinion gear 81. The rack 47 is located below the pinion gear 81, and a roller 82 is disposed below the rack 47. The roller 82 is supported by the main body 1 and rotates around an axis in the left-right direction. The rack 47 is positioned so as to be sandwiched between the roller 82 and the pinion gear 81. The operation member 4 is supported by the main body 1 so as to be slidable in the front-rear direction, and linearly moves back and forth. A clearance hole 14 penetrating in the left-right direction is formed in the rear portion of the main body 1, and a finger hooking hole 42 is formed in the rear portion of the operation member 4. The finger hole 42 can move back and forth. Then, an index finger or the like can be inserted into the finger-holding hole 42 of the operation member 4 to perform both a rearward pulling operation and a frontward pressing operation. Further, for example, two fingers such as an index finger and a middle finger can be put in the finger hooking hole 42 and operated.

  The spring 7 is disposed between the pinion gear 81 and the main body 1. The distal end 71a of the first arm 71 of the spring 7 is inserted into the connecting hole 15 of the main body 1 and is rotatably supported by the main body 1. The distal end 72a of the second arm 72 of the spring 7 is pinion gear. The pinion gear 81 is rotatably supported by being inserted into the connection hole 83 at the peripheral edge of the pin 81. When the closed state in FIG. 13 is changed to the open state in FIG. 14, the operation member 4 is retracted from the first position in FIG. 13 to the second position in FIG. 14. As the operating member 4 moves backward, the pinion gear 81 rotates counterclockwise, and the spring 7 rotates clockwise around the tip 71a (the connection hole 15 of the main body 1) of the first arm 71. .

  In the closed state in FIG. 14, the drive link 80 is positioned horizontally on the center line of the main body 1, and the first connection support shaft 22, the second rotation support shaft 21, and the second connection support shaft. 23 are arranged in a straight line. That is, the drive link 80 becomes a dead center in the closed state. For this reason, even if an external force in the opening direction acts on the lower gripping teeth 3, the lower gripping teeth 3 do not rotate, and the rotation of the lower gripping teeth 3 is restricted. When the operating member 4 is advanced from this state, the pinion gear 81 rotates clockwise, the restriction of the lower gripping teeth 3 is released, and the lower gripping teeth 3 can be rotated in the opening direction. The spring 7 reverses the urging direction in the middle from the state of FIG. 10 to the state of FIG. Although not shown, the distal end portion 71a of the first arm 71 of the spring 7 (the coupling hole 15 of the main body 1), the distal end portion 72a of the second arm 72 (the coupling hole 83 of the pinion gear 81), and the second rotational support. The state when the shaft 21 is positioned in a straight line is a boundary state, and the biasing direction of the spring 7 is reversed with this state as a boundary. In the open state of FIG. 13, the spring 7 applies a clockwise urging force to the pinion gear 81, and the operation member 4 is urged forward. That is, the operation member 4 is biased toward the first position, and the lower gripping tooth 3 is biased in the opening direction via the drive link 80. On the other hand, in the closed state of FIG. 14, the spring 7 applies a counterclockwise urging force to the pinion gear 81, and the operation member 4 is urged rearward. That is, the operation member 4 is biased to the second position side. Although the rack and pinion mechanism is employed in FIGS. 13 and 14, a link mechanism may be employed instead, and various modifications are possible.

<Other embodiments>
The spring 7 may be various springs 7 other than the torsion spring, and may be, for example, a cylindrical coil spring that expands and compresses in the axial direction (centerline direction). In the above embodiment, the spring 7 is configured to bias the operation member 4 via the swing cam 5 and the pinion gear 81, but the spring 7 may be configured to directly bias the operation member 4. . The spring 7 preferably biases the operating member 4 toward the first position over the entire section from the first position to the middle position. For example, the biasing force is 0 at the first position. Also good. Further, it is preferable that the spring 7 urges the operation member 4 to the second position side over the entire section from the second position to the middle position. For example, the urging force is 0 at the second position. It may be.

  Further, the configuration for restricting the rotation of the lower gripping teeth 3 in the opening direction in the closed state can be changed as appropriate, and various configurations can be adopted, and the configuration is on the output side unless the operation member 4 on the input side is operated. Any structure that restricts the rotation of the lower gripping teeth 3 may be used. Furthermore, in the above-described embodiment, the lower gripping tooth 3 of the pair of gripping teeth 2 and 3 is the movable tooth and the upper gripping tooth 2 is the fixed tooth. Both gripping teeth 2 and 3 may be configured as movable teeth. Further, the operation of the movable tooth may be an operation such as a parallel movement instead of a rotation operation.

  The shape of the grip portion 12 may also be various. The grip portion 12 extends toward the rear side relative to the main body 1 or extends while being inclined rearward and downward. It may be a gun grip shape extending from the bottom to the bottom.

DESCRIPTION OF SYMBOLS 1 Main body 2 Upper gripping tooth 2a Tip part 3 Lower gripping tooth 3a Tip part 4 Operation member 5 Swing cam 6 Rear link 7 Spring 8 Reference line 10 Front main part 11 Rear main part 12 Gripping part 13 Swelling part 14 escape hole 15 connection hole 20 first rotation support shaft 21 second rotation support shaft 22 first connection support shaft 23 second connection support shaft 24 third rotation support shaft 30 tooth main portion 31 follower Part 32 extending arm part 33 stopper projection part 34 connecting hole 35 driving arm part 36 second follower part 40 connecting arm part 41 operation part 42 finger hooking hole 43 finger ring part (finger hooking part)
44 Upper extension part 45 Protrusion part 45a Rear surface (push part)
46 Finger contact protrusion 47 Rack 50 Cam part 51 Link part 52 First cam surface 53 Second cam surface 54 Top part 55 Connection hole 56 Third cam surface 70 Cylindrical part 71 First arm 71a Tip part 72 Second arm 72a Tip 80 Drive link 81 Pinion gear 82 Roller 83 Connection hole 100 Placement surface

Claims (6)

A fish grabber to grab the mouth of the fish,
At least one of which is a movable tooth and includes a pair of gripping teeth that open and close to grasp the fish mouth, and an operation member that can move between a first position and a second position, and the operation member is in the first position. In the state where the pair of gripping teeth are in the open state and the operation member is in the second position, the pair of gripping teeth are in the closed state,
A spring that reverses the urging direction at a midway position between the first position and the second position of the operating member; and on the first position side, the spring is located at the first position on the operating member; A fish grabber characterized in that a biasing force to the side is applied, and a spring applies a biasing force to the operation member toward the second position side on the second position side.   The spring is a torsion spring configured to change the opening angle between the two arms, and the spring is disposed between the two members that relatively rotate with the movement of the operation member, 2. The fish grabber according to claim 1, wherein the arm is rotatably connected to one member and the second arm of the spring is rotatably connected to the other member.   The pair of gripping teeth is provided at the front end portion, the operation member is located on the rear side with respect to the pair of gripping teeth, the first position of the operation member is relatively on the front side, and the second position is relatively 3. The fish grabber according to claim 1, wherein the fish gripper is located on the rear side, and when the operation member is pulled rearward, the operation member becomes the second position and the pair of gripping teeth are closed.   A grip portion is provided on the rear side of the operation member, and the operation member performs a push operation with a finger holding portion capable of performing a pulling operation with a finger of a hand gripping the grip portion and a finger of the hand gripping the grip portion. The fish grabber according to claim 3, further comprising a pusher that can be moved.   Provided with a transmission mechanism that interlocks the opening / closing operation of the pair of gripping teeth and the moving operation of the operation member, and the movement of the pair of gripping teeth in the opening direction is restricted when the operation member is located at the second position. The fish grabber according to any one of claims 1 to 4, wherein the movement restriction in the opening direction of the pair of grabbing teeth is released by operating toward the first position.   The transmission mechanism includes a link mechanism, the operation member is a member constituting the link mechanism, the link mechanism is an approximate linear motion mechanism of a four-bar linkage mechanism, and the operation member has a first position and a second position. 6. A fish grabber according to claim 5, wherein an approximate linear motion is performed between the two.

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