TWI817288B - Sliding bearings and fishing machines equipped with sliding bearings - Google Patents

Abstract

[Problem] The present invention provides a sliding bearing that can easily calibrate a rotation axis, prevents eccentric wear, and achieves a long life, and a fishing machine equipped with the sliding bearing. [Solution] The sliding bearing of the present invention is provided with: a first member having a through hole, and a first concave spherical portion formed at one end of the through hole; and a second member having a through hole, and a first concave spherical portion formed at one end of the through hole. There is a second concave spherical portion, and the second concave spherical portion can be fixed to the first member in such a manner that the second concave spherical portion faces the first concave spherical portion of the first member; the ball bearing has a through hole in the axial direction, in The outer peripheral surface has a convex spherical portion corresponding to the first concave spherical portion and the second concave spherical portion; and a resin bushing has a shaft hole for the rotation shaft to pass through and is removably inserted into the ball bearing. Through round hole. The ball bearing is provided between the first member and the second member in a state where the convex spherical portion of the ball bearing is in sliding contact with the first concave spherical portion of the first member and the second concave spherical portion of the second member. Fasten between.

Description

Sliding bearings and fishing machines equipped with sliding bearings

Field of invention

The present invention relates to a sliding bearing in which a rotating shaft can reciprocate in the axial direction, and a fishing machine equipped with the sliding bearing.

Background of the invention

There is known a fishing machine for catching squid and other fish (for example, Patent Document 1), which is equipped with a rotating drum mounted on a boat to lower and winch the fishing line; a drive motor to drive the rotating drum; and a control mechanism. , control the rotation speed of the drive motor. The rotating drum of such a fishing machine is formed by, for example, a lattice structure in which a plurality of trusses are erected between two side plates arranged parallel to each other at both ends of the rotating shaft, and a plurality of rotating drums on which fishing lines can be wound. the outer perimeter of a truss.

Figure 8 schematically illustrates the structure of reeling in the fishing line in the squid fishing machine. Figure 9 schematically illustrates the manner in which the fishing line is reeled in the squid fishing machine. Figure 10 schematically shows the sliding bearing in the conventional squid fishing machine. Figure 11 schematically illustrates the lowering action of the rotating drum in the squid fishing machine, and Figure 12 illustrates the action of the fishing lines from multiple squid fishing machines.

As shown in FIG. 8 , the squid fishing machine 1 makes the rotating drum 3 connected to the rotating shaft 2 rotate forward and reverse to winch and lower the fishing line 5 wound around the rotating drum 3 . A sinking weight 7 is installed at the front end of the fishing line 5, and a plurality of fishing hooks 6 are installed in the middle section. In order to allow the fishing hook 6 to be released into the sea without being entangled (lowered), the fishing line 5 cannot be overlapped and wound around the rotating drum 3 as shown in Figure 9(B). The fishing line 5 must be wrapped as shown in Figure 9(A) ), it is very important to wind it evenly around the rotating drum 3 as shown in ).

Therefore, most squid fishing machines are equipped with a "reciprocating function" (level-wind function). By simultaneously performing the movement of rotating the rotating drum 3 to raise and lower the fishing line 5, and the movement of reciprocating the rotating drum 3 left and right so as not to wind the fishing line 5 at the same position, "reciprocation" can be obtained. Motor function". As shown in Figure 10, the bearing used to obtain this "reciprocating motion function" is not a general support bearing, but a sliding bearing 4 made of resin that can slide in the axial direction.

However, such sliding bearing 4 will inevitably generate friction in its structure, and when friction occurs, the sliding of the rotating shaft 2 will deteriorate, which may cause problems. As shown in Figure 11, the squid fishing machine 1 is configured to use the power of an electric motor to hoist the fishing line when hoisting. Although the motor is reversely rotated when lowering, in order to prevent accidents, the motor When the one-way clutch inside is actuated, the drum will be in an idling state and will be lowered only by the weight of the sinking weight 7 attached to the front end of the fishing line 5. Therefore, if the sliding of the rotating shaft 2 becomes worse, the fishing line 5 will not be able to descend, or will descend slowly.

If the fishing line 5 cannot be lowered, or if the lowering speed is slowed down, problems will arise when the squid fishing boat performs coordinated control, that is, "sequential operation." "Sequential operation" means that in a fishing boat equipped with a plurality of squid fishing machines 1, the squid are continuously caught in order to prevent each other's fishing lines from getting entangled or to prevent the squid group from escaping. One of the techniques is to let the squid fishing machines 1 take turns to operate one at a time and stagger the hoisting/lowering movements at a certain time. This is a known operation method. Figure 12(A) shows the case where sequential operation is performed, and Figure 12(B) shows the case where sequential operation is not performed.

During this sequential operation, if there is a squid fishing machine 1 whose fishing line 5 drops slowly, the timing of the operation of the other squid fishing machines 1 will not be properly coordinated, and eventually the lines will get tangled together, or the other squid fishing machines 1 will become entangled. Waiting for the order to arrive and having to stop the whole thing. Especially when the threads become tangled, not only the work must be stopped, but also a huge amount of labor and time are required for repair. Therefore, measures to improve the friction of the sliding bearing 4 have been pursued in the past. Advanced technical documents patent documents

Patent Document 1: Japanese Invention Publication No. 2010-273646

Summary of the invention The problem to be solved by the invention

However, since the structural focus of the squid fishing machine 1 is to achieve reliability even under severe use conditions, it will not be equipped with a main frame with high precision, but will be simply made into a box-shaped frame. Therefore, regarding the original The installation position of the sliding bearing 4 requires high precision, and manual work is required to correct the installation position one by one.

Fig. 13 schematically illustrates a method for correcting distortion of the squid fishing machine frame, Fig. 14 schematically illustrates the gap of the resin bushing, and Fig. 15 schematically illustrates the relationship between the gap and the surface pressure of the resin bushing.

As shown in Figure 13, until now, the side surfaces of the box-shaped frame to which the sliding bearing 4 is fixed are sometimes not parallel due to distortion caused by welding deformation, etc., so the box shape must be corrected by tapping with a hammer, etc. The shape of the frame is used to center the sliding bearing 4.

However, it is very difficult to perform corrections in millimeter units and 1° units, and it is difficult to achieve perfect centering. Therefore, as shown in FIG. 14(A) , it may be used even if the angle is not suitable. In such a case, the rotation resistance of the rotating shaft 2 may become high. In order to avoid such a situation, conventionally, as shown in FIG. 14(B) , the inner diameter of the resin bushing provided on the inner periphery of the sliding bearing 4 has been enlarged.

However, as shown in Figure 15, if the inner diameter of the resin bushing is enlarged, not only will the resin bushing be prone to eccentric friction, but the surface pressure will become too high and may exceed the sliding capacity of the material of the resin bushing. Performance evaluation value (PV value), at this time, there will be the following problem: the resin bushing will continue to wear, and the life of the sliding bearing 4 will be significantly shortened.

In addition, the slidability evaluation value (PV value) is the product of P (surface pressure of the sliding surface) and V = (velocity of the sliding surface). The unit of PV value is "kgf/cm ²・m/min".

The present invention can solve the above-mentioned problems of the conventional technology, and aims to provide a sliding bearing that can easily align the rotation axis, prevent eccentric wear, and achieve a long life, and a fishing rod equipped with the sliding bearing. machine. means to solve problems

According to the present invention, a sliding bearing that supports the rotating shaft so as to be slidable in the axial direction includes: a first member having a through hole, and a first concave spherical portion formed at one end of the through hole; and a second member, It has a through hole, a second concave spherical portion is formed at one end of the through hole, and can be fixed to the first member in such a manner that the second concave spherical portion faces the first concave spherical portion of the first member; the ball The bearing has a through-hole in the axial direction and has a convex spherical portion corresponding to the first concave spherical portion and the second concave spherical portion on the outer peripheral surface; and a resin bushing has a shaft through which the rotation shaft is inserted. hole, which is removably inserted into the through hole of the ball bearing. The ball bearing is provided between the first member and the second member in a state where the convex spherical portion of the ball bearing is in sliding contact with the first concave spherical portion of the first member and the second concave spherical portion of the second member. Fasten between.

In the sliding bearing, the ball bearing is in a state where the convex spherical portion of the ball bearing is in sliding contact with the first concave spherical portion of the first member and the second concave spherical portion of the second member. Fasten between the 2nd members. The resin bushing is removably inserted into the through-hole of the ball bearing, whereby when the rotation axis is calibrated and centering is confirmed, the first member and the second member are locked together with bolts, for example. , can fix the movement between the convex spherical part of the ball bearing, the first concave spherical part of the first member and the second concave spherical part of the second member, can easily calibrate the rotation axis, and can prevent resin The eccentric friction of the bushing can achieve long service life.

The through hole of the ball bearing should preferably have a small diameter portion and a large diameter portion. The small diameter portion and the large diameter portion should be configured in a cylindrical shape and connected to each other. In addition, the outer circumferential surface of the resin bushing should have a through hole. The small diameter part and the large diameter part correspond to the small diameter part and the large diameter part respectively.

The resin bushing is preferably configured to be slidable in the axial direction with the rotation shaft inserted into the shaft hole.

According to the present invention, the fishing machine is equipped with: a rotating drum, which is wound with a fishing line and is attached to a rotating shaft so as to be able to rotate in the lowering and hoisting directions; and a driving motor to drive the rotating drum in the lowering and hoisting directions. ; a mobile driving mechanism to make the rotating shaft reciprocate in the axial direction; and a sliding bearing to support the rotating shaft so that the rotating shaft can slide in the axial direction. The sliding bearing is provided with: a first member having a through hole and a first concave spherical portion formed at one end of the through hole; and a second member having a through hole and a second concave spherical portion formed at one end of the through hole. , and can be fixed to the first member in such a manner that the second concave spherical portion faces the first concave spherical portion of the first member; the ball bearing has a through hole in the axial direction, and has an outer circumferential surface corresponding to the first concave spherical portion. a spherical portion and a convex spherical portion corresponding to the second concave spherical portion; and a resin bushing, which has a shaft hole for the rotation shaft to pass through and is removably inserted into the through hole of the ball bearing. The ball bearing is provided between the first member and the second member in a state where the convex spherical portion of the ball bearing is in sliding contact with the first concave spherical portion of the first member and the second concave spherical portion of the second member. Fasten between.

In the fishing machine, the through hole of the ball bearing of the sliding bearing should preferably have a small diameter part and a large diameter part. The small diameter part and the large diameter part are respectively configured in a cylindrical shape and connected to each other. In addition, the outer periphery of the resin bushing The surface should preferably have a small diameter part and a large diameter part respectively corresponding to the small diameter part and the large diameter part of the through-hole.

In the fishing machine, the resin bushing of the sliding bearing is preferably configured to be slidable in the axial direction with the rotating shaft inserted into the shaft hole. Invention effect

According to the present invention, in the sliding bearing, the ball bearing is in a state where the convex spherical portion of the ball bearing is in sliding contact with the first concave spherical portion of the first member and the second concave spherical portion of the second member. The first member and the second member are fastened. The resin bushing is removably inserted into the through-hole of the ball bearing, whereby when the rotation axis is calibrated and centering is confirmed, the first member and the second member are locked together with bolts, for example. , can fix the movement between the convex spherical part of the ball bearing, the first concave spherical part of the first member and the second concave spherical part of the second member, can easily calibrate the rotation axis, and can prevent resin The eccentric friction of the bushing can achieve long service life.

Form used to implement the invention

Hereinafter, embodiments of the sliding bearing and fishing machine of the present invention will be described with reference to the drawings.

FIG. 1 shows the overall structure of a squid fishing machine 100 as an embodiment of the present invention. (A) is a front view of the squid fishing machine 100, and (B) is a side view of the squid fishing machine 100. Figure 2 shows the internal structure of the squid fishing machine body 10, and Figure 3 shows the electrical structure of the squid fishing machine 100. Figure 4 shows the structure of the sliding bearing 40 in the squid fishing machine 100, and Figure 5 shows the assembly state and internal structure of the sliding bearing 40. Figure 6 schematically shows the use state of the sliding bearing 40. (A) in the same figure is the state before fixation, and (B) is the state after fixation.

As shown in Figure 1 , the squid fishing machine 100 of this embodiment is equipped with: a fishing machine body 10; a rotating shaft 20 that is freely rotatably attached to the fishing machine body 10; and a pair of rotating drums 30 that are mounted on the fishing machine body 10. Both sides are mounted on the rotating shaft 20; and a pair of sliding bearings 40 support the rotating shaft 20 so that the rotating shaft 20 can slide in the axial direction. A pair of fishing lines 50 is wound around each pair of rotating drums 30 , and a plurality of fishing hooks 60 are provided on each pair of fishing lines 50 . Moreover, a pair of sinking weights 70 are respectively provided at the lower ends of the pair of fishing lines 50 .

As shown in FIGS. 1 and 2 , the fishing machine body 10 is provided with: a casing 11; a drive motor 12 disposed inside the casing 11 to rotate the rotating shaft 20; and an electromagnetic clutch 13 to transmit the rotation of the drive motor 12. to the rotating shaft 20; the rotation detector (rotation detection component) 14 detects the rotation speed and direction of the rotating shaft 20 and the rotating drum 30; the control part 15 controls the drive motor 12 and the electromagnetic field according to the detection result of the rotation detector 14 The clutch 13; and the moving drive mechanism (reciprocating mechanism, level-wind mechanism) 16 make the rotating drum 30 reciprocate in the axial direction along with the rotating shaft 20.

As shown in FIG. 1(A) , an operation panel of the control unit 15 is mounted on the front surface of the casing 11 . The input unit 15 a of the control unit 15 , a display unit 15 b , a power switch, and the like are provided on the operation panel.

As shown in Figure 2, the drive motor 12 is disposed in the lower part of the housing 11. The driving force of the drive motor 12 is transmitted through the first transmission mechanism 17a composed of the engaged gears, the electromagnetic clutch 13, and the engagement of the gears. The second transmission mechanism 17b is configured to transmit the signal to the rotating shaft 20 . Moreover, the rotation detector 14 is connected to the drive shaft 19 through the third transmission mechanism 17c composed of a chain and a sprocket.

The electromagnetic clutch 13 is a clutch that performs ON and OFF transmission of power by electromagnetic force generated by energizing a coil, and various conventional structures can be used.

The rotation detector 14 is a rotary encoder that detects the rotation speed and rotation direction of the rotating shaft 20 and the rotating drum 30 .

As shown in FIG. 3 , the control unit 15 includes: an input unit 15a, which is composed of a keyboard or a liquid crystal touch panel; a display unit 15b, which is composed of a liquid crystal display or a liquid crystal touch panel; a CPU 15c; a ROM 15d; a RAM 15e; and a rotation unit. The speed calculation component 15f calculates the rotation speed of the rotation shaft 20 and the rotation drum 30 from the output signal of the rotation detector 14; the rotation direction determination component 15g determines whether the rotation direction of the rotation drum 30 is rotation from the output signal of the rotation detector 14. The drum 30 rotates in the hoisting direction (forward rotation) or the lowering direction (reverse rotation); the externally applied voltage variable calculation component 15h determines that the rotating drum 30 is rotating in the lowering direction by the rotation direction determining component 15g, based on From the rotational speed obtained by the rotational speed calculation component 15f, the variable of the externally applied voltage to the electromagnetic clutch 13 required to maintain the rotational speed at a predetermined rotational speed is calculated; the externally applied voltage adjustment component 15i, for the preset externally applied voltage The voltage is increased or decreased by the variable of the external voltage calculated by the external voltage variable calculation component 15h to adjust the external voltage; and the release distance calculation component 15j is used to calculate the distance of the fishing line per unit time.

The CPU 15c controls the entire operation of the fishing machine 100 while using the RAM 15e as a work area according to the control program stored in the ROM 15d.

The applied voltage variable calculation unit 15h is configured to calculate the applied voltage to the electromagnetic clutch 13 required to maintain the fishing line lowering speed at a predetermined value based on the obtained rotation speed when it is determined that the rotating drum 30 is reversely rotating. voltage variable. For example, the applied voltage variable calculation unit 15h calculates the product of the rotational speed obtained from the rotational speed calculation unit 15f and a predetermined constant corresponding to the rotational speed as the variable of the externally applied voltage to the electromagnetic clutch 13 .

The externally applied voltage adjustment component 15i applies an externally applied voltage to the electromagnetic clutch 13. The externally applied voltage is a variable of the externally applied voltage calculated by the externally applied voltage variable calculation component 15h. For a predetermined voltage setting used to drive the electromagnetic clutch 13 It is obtained by adding or subtracting the value (or winch force setting value).

The pay-out distance calculation unit 15j calculates the pay-out distance of the fishing line per unit time when the rotating drum rotates in the lowering direction based on the detection result of the rotation detector 14.

The control unit 15 controls: when the rotation direction determination unit 15g determines that the rotation drum 30 is rotating in the lowering direction and the rotation speed obtained from the rotation speed calculation unit 15f is less than a predetermined rotation speed, the drive motor 12 controls the rotation speed. The rotating drum 30 is driven in the lowering direction; and when the rotating speed of the rotating drum 30 is higher than a predetermined rotating speed, the driving motor 12 is stopped. In addition, the control unit 15 performs control: when it is determined that the rotating drum 30 is rotating in the lowering direction and the rotating speed of the rotating drum 30 is less than a predetermined rotating speed, the electromagnetic clutch 13 is connected; When the rotation speed is higher than the rotation speed, the electromagnetic clutch 13 is released.

In addition, the control unit 15 can automatically set the connecting torque of the electromagnetic clutch 13 to the connecting torque of the clutch assist operation mode. The setting of the connecting torque in the clutch assist operation mode can be automatically performed by the control unit 15 as will be described later, or it can be manually performed by the operator. When setting manually, while the drive motor 12 is rotated so that the rotating drum 30 rotates in the lowering direction, the connecting torque of the electromagnetic clutch 13 is gradually increased from zero, and the torque value when the rotating drum 30 starts to rotate is taken as The coupling torque for the clutch assist operation mode is set to the electromagnetic clutch 13 .

The movement drive mechanism 16 is a reciprocating mechanism and is configured to rotate the rotating shaft 20 while reciprocating in the axial direction. This moving drive mechanism 16 has a drive shaft 19 that is rotationally driven by the drive motor 12 through the first transmission mechanism 17a and the second transmission mechanism 17b and is provided parallel to the rotation shaft 20; a spiral groove 18a is provided in the drive shaft 19 The surface is formed to reciprocate relative to the axial direction of the driving shaft 19; and the tab member 18b is attached to the rotating shaft 20 of the rotating drum 30 and is attached to the rotating shaft 20 immovably in the axial direction of the rotating shaft 20. , is embedded in the spiral groove 18a and will be guided along the spiral groove 18a when the drive shaft 19 rotates. By adopting such a moving driving mechanism 16, the fishing line 50 can be prevented from being squeezed in one place (being rolled too thickly), and the fishing hooks 60 can also be prevented from being entangled with each other. In addition, by changing the diameter of the winding part, incorrect calculation of the length of the winding can be prevented.

As shown in FIGS. 1 and 2 , the rotating shaft 20 is configured to penetrate the housing 11 of the fishing machine body 10 . The rotating shaft 20 is supported by a pair of sliding bearings 40 so as to be slidable in the axial direction. At both ends of the rotating shaft 20, rotating drums 30 are respectively mounted.

In the present embodiment, the rotating drum 30 is a drum in which the winding portion around which the fishing line 50 is wound has a circular axial cross-sectional shape. The rotating drums 30 are rotated and driven in an appropriate direction by the fishing machine body 10, whereby the fishing line 50 can be hoisted or lowered. The fishing line 50 is equipped with a bait-attached fishing hook 60 like a branch hook or a connecting hook. Furthermore, a sinking weight 70 is attached to the front end of the fishing line 50 .

As shown in FIGS. 4 and 5 , each sliding bearing 40 includes a first member 41 , a second member 42 , a ball bearing 43 , and a resin bush 44 having a shaft hole 44 a through which the rotating shaft 20 is inserted.

The first member 41 has a through hole 41a, and a first concave spherical portion 41b is formed at one end of the through hole 41a. The first member 41 is preferably made of rigid metal (for example, iron, stainless steel, copper, etc.).

The second member 42 has a through hole 42a, and a second concave spherical portion 42b is formed at one end of the through hole 42a. The second member 42 is configured such that the second concave spherical portion 42 b faces the first concave spherical portion 41 b of the first member 41 and is fixed to the first member 41 . In addition, the second member 42 is preferably formed of a rigid metal (for example, iron, stainless steel, copper, etc.).

The ball bearing 43 has a convex spherical portion 43a on the outer peripheral surface and an axial through-hole 43b in the center. The convex spherical portion 43a is formed to correspond to the first concave spherical portion 41b of the first member 41 and the second concave spherical portion 42b of the second member 42. In this embodiment, the through hole 43b has a small diameter portion 43b ₁ and a large diameter portion 43b ₂ , and the small diameter portion and the large diameter portion are respectively configured in a cylindrical shape and are connected to each other. In addition, the ball bearing 43 is preferably made of a rigid metal (for example, iron, stainless steel, copper, etc.).

The resin bushing 44 is detachably inserted into the through hole 43b of the ball bearing 43. The outer peripheral surface of the resin bush 44 has a small diameter portion 44b 1 and a large diameter portion 44b ₂ respectively corresponding to the small diameter portion 43b ₁ and the large diameter portion 43b ₂ of the through hole 43b of the ball bearing ₄₃ . The resin bushing 44 should be made of a material with high wear resistance. However, due to the material of the rotating shaft 20, the size of the load, the rotation speed, etc., the most suitable resin material will be different, so it is necessary to select one that suits the conditions. Material.

The difference in surface pressure between the rotating shaft 20 and the resin bushing 44 caused by the different inner diameters of the resin bushing 44 is shown in FIG. 7 . Here, the rotating shaft 20 has a diameter of φ30mm and is made of SUS304. As shown in FIG. 7 , every 0.1 mm change in the inner diameter of the resin bushing 44 can improve the surface pressure by more than 10%. Therefore, it is fully expected that the present invention can extend the life of the product by reducing the inner diameter.

In this way, the sliding bearing 40 has a structure in which the outer peripheral surface of the ball bearing 43 is made into a spherical shape (the convex spherical portion 43a), and when the rotation shaft 20 is calibrated, at the time when the centering is confirmed, By locking the first member 41 and the second member 42 with bolts or the like, the ball bearing 43 is tightened and its movement is fixed. The ball bearing 43 is fixed by leaving a gap between the first member 41 and the second member 42 while the first member 41 and the second member 42 are in close contact with the ball bearing 43, and finally by tightening the bolts. The friction between the spherical surfaces is generated to fix it. Thereby, automatic calibration will not be performed when the squid fishing machine 100 is operated. The reason is that in the case of the squid fishing machine 100, since the device structure is very simple, there is no structure that can catch the rotating shaft 20 except the sliding bearing 40. If the sliding bearing 40 is allowed to move freely, the squid fishing machine 100 Otherwise, the rotation of the rotating drum 30 will be unstable (vibration will occur).

Since centering is possible in the sliding bearing 40, there is no need to ensure an excessively large clearance and a small appropriate clearance can be set. Therefore, a longer life of the sliding bearing 40 can be expected.

In addition, by making the centering work easier, it is expected that the work time will be shortened and the problem of different finishing methods by different operators can be eliminated. If the difference in finishing methods of each squid fishing machine 100 can be solved, it will also be possible. It is expected that the control accuracy during "sequential operation" can be improved.

In addition, among the conventional sliding bearings, the centering of the adjusted state when shipped from the factory is the most complete, but it is impossible to adjust again on the ship. In contrast, in the case of the sliding bearing 40 of the present invention, the adjustment will be completed. After the squid machine 100 is installed on the boat, when the box-shaped frame (casing 11) of the fishing machine body 10 is distorted, the misalignment of the sliding bearing 40 can be solved on site by loosening the bolts of the sliding bearing 40. Re-lock.

As described above, the squid fishing machine 100 of this embodiment is provided with the fishing machine body 10, the rotating shaft 20, a pair of rotating drums 30, and the rotating shaft 20 is supported so as to be slidable in the axial direction. 1 pair of sliding bearings 40. Each sliding bearing 40 has a first member 41, a second member 42, a ball bearing 43, and a resin bushing 44 having a shaft hole through which the rotating shaft 20 is inserted. The ball bearing 43 has a convex shape. The spherical portion 43a is in sliding contact with the first concave spherical portion 41b of the first member 41 and the second concave spherical portion 42b of the second member 42, and is fastened between the first member 41 and the second member 42. .

Thereby, when the rotation shaft 20 is calibrated and the centering is confirmed, the first member 41 and the second member 42 are locked to fix the convex spherical portion of the ball bearing 43 to the first member 41 and the second member 42 . 2. The movement between the first concave spherical portion 41b and the second concave spherical portion 42b of the member 42 makes it easy to calibrate the rotating shaft 20 and prevents eccentric wear of the resin bushing 44, thereby achieving long-term operation. longevity.

Furthermore, in the sliding bearing 40 of the above embodiment, the through hole 43b of the ball bearing 43 has the small diameter portion 43b ₁ and the large diameter portion 43b ₂ , and the resin bushing 44 has the small diameter portion 43b ₁ on the outer peripheral surface. and the large diameter portion 43b ₂ , but the present invention is not limited to this. For example, instead of providing a step in the through hole of the ball bearing, a flange portion may be provided on the outer periphery of one end of the resin bushing.

In the above embodiment, the example of the squid fishing machine 100 has been described, but the present invention is not limited to this. The present invention can also be applied to a fishing machine mounted on a boat for catching other fish.

The present invention is not limited to the above-described embodiments, but various design modifications are included in the technical scope within the scope of the invention described in the scope of the patent application. industrial availability

The present invention can be used in a fishing machine mounted on a boat and equipped with a rotating drum for lowering and hoisting the fishing line for harvesting squid and other fish.

1,100: Squid fishing machine 2, 20: Rotating shaft 3, 30: Rotating drum 4, 40: Sliding bearing 5, 50: Fishing line 6, 60: Fishing hook 7, 70: Sinking weight 10: Fishing machine body 11: Housing 12 : Drive motor 13: Electromagnetic clutch 14: Rotation detector 15: Control unit 15a: Input unit 15b: Display unit 15c: CPU 15d: ROM 15e: RAM 15f: Rotation speed calculation unit 15g: Rotation direction determination unit 15h: Externally applied voltage Variable calculation unit 15i: Externally applied voltage adjustment unit 15j: Release distance calculation unit 16: Moving drive mechanism 17a: First transmission mechanism 17b: Second transmission mechanism 17c: Chain 18a: Spiral groove 18b: Adjustment piece member 19: Drive shaft 41: First member 41a, 42a: Through hole 41b: First concave spherical portion 42: Second member 42b: Second concave spherical portion 43: Ball bearing 43a: Convex spherical portion 43b: Through hole 43b ₁ , 44b ₁ : Small diameter part 43b ₂ , 44b ₂ : Large diameter part 44: Resin bushing 44a: Shaft hole

[Fig. 1] (A) A front view and (B) a side view schematically showing the structure of a squid fishing machine according to an embodiment of the present invention. [Fig. 2] A front view schematically showing the internal structure of the squid fishing machine in Fig. 1. [Fig. 3] A block diagram schematically showing the electrical structure of the squid fishing machine in Fig. 1. [Fig. 4] An exploded perspective view schematically showing the structure of the sliding bearing in the squid fishing machine of Fig. 1. [Fig. [Fig. 5] A partial cross-sectional perspective view schematically showing the internal structure of the sliding bearing of Fig. 4 in an assembled state. [Fig. 6] A cross-sectional view schematically showing the use state of the sliding bearing in Fig. 4. (A) is the state before fixation, and (B) is the state after fixation. [Fig. 7] A diagram schematically showing the relationship between the inner diameter of a resin bushing and the surface pressure. [Fig. 8] A diagram schematically illustrating the structure of reeling in a fishing line in a squid fishing machine. [Fig. 9] A diagram schematically illustrating how the fishing line is wound up in this squid fishing machine. [Fig. 10] A cross-sectional view schematically showing the structure of a sliding bearing in a conventional squid fishing machine. [Fig. 11] A diagram schematically explaining the lowering operation of the rotating drum in the squid fishing machine. [Fig. 12] A diagram illustrating the movements of fishing lines from a plurality of squid fishing machines. [Fig. 13] A diagram schematically explaining the distortion correction method of the squid fishing machine frame. [Fig. 14] A diagram schematically explaining the gap of the resin bushing. [Fig. 15] A diagram schematically explaining the relationship between the gap and the surface pressure of the resin bushing.

40: Sliding bearing

41: 1st component

41a,42a:Through hole

41b: 1st concave spherical surface

42: 2nd component

42b: The second concave spherical surface

43:Ball bearing

43a: Convex spherical surface

43b:Through round hole

44b ₁ : small diameter part

44b ₂ : Large diameter part

44:Resin bushing

44a: Shaft hole

Claims (2)

A sliding bearing that supports the rotating shaft so that the rotating shaft can slide in the axial direction, characterized in that it is provided with: a first member having a through hole, and a first concave spherical portion is formed at one end of the through hole ; The second member has a through hole, a second concave spherical portion is formed at one end of the through hole, and the second concave spherical portion can face the first concave spherical portion of the first member; The ball bearing is fixed to the first member by a method; the ball bearing has a through hole in the axial direction, and has a convex spherical portion corresponding to the first concave spherical portion and the second concave spherical portion on the outer peripheral surface; and is made of resin. The bushing has a shaft hole through which the rotation shaft is inserted, and is removably inserted into the through hole of the ball bearing. The resin bushing is configured to support the rotation shaft so as to be slidable in the axial direction. a rotating shaft, and a gap is set so as to reduce the surface pressure between the rotating shaft and the resin bushing to bear a load; the ball bearing has a small diameter part and a large diameter part, and the through hole has a small diameter part and a large diameter part. The small diameter portion and the large diameter portion are each configured in a cylindrical shape and are connected to each other. The outer peripheral surface of the resin bushing has a small diameter portion and a small diameter portion respectively corresponding to the small diameter portion and the large diameter portion in front of the through hole. In the large-diameter portion, the ball bearing is in a state in which the front convex spherical portion of the ball bearing is in sliding contact with the first concave spherical portion in front of the first member and the second concave spherical portion in front of the second member. , fastened between the first member and the second member. A fishing machine, which is characterized in that: it is equipped with: a rotating drum, which is wound with a fishing line, is attached to a rotating shaft and can rotate in the lowering direction and the hoisting direction; a driving motor drives the rotating drum in the lowering direction or the hoisting direction. direction drive; moving the driving mechanism to make the aforementioned rotating shaft move back and forth in the axial direction; and sliding A bearing supports the rotating shaft so that the rotating shaft can slide in the axial direction, and the sliding bearing is provided with: a first member having a through hole, and a first concave spherical portion formed at one end of the through hole; The member has a through hole, a second concave spherical portion is formed at one end of the through hole, and can be fixed to the first member in such a manner that the second concave spherical portion faces the first concave spherical portion of the first member. The aforementioned first member; a ball bearing having a through-hole in the axial direction and a convex spherical portion corresponding to the aforementioned first concave spherical portion and the aforementioned second concave spherical portion on the outer peripheral surface; and a resin bushing, It has a shaft hole through which the rotation shaft is inserted, and the through hole is detachably inserted into the ball bearing. The resin bushing is configured to support the rotation shaft so that the rotation shaft can slide in the axial direction, The gap is set so as to reduce the surface pressure between the rotating shaft and the resin bushing to bear the load. The ball bearing has a small diameter part and a large diameter part, and the through hole has a small diameter part. The outer peripheral surface of the resin bushing has a small diameter portion and a large diameter portion respectively corresponding to the small diameter portion and the large diameter portion in front of the through hole. , the aforementioned ball bearing is in a state where the front convex spherical portion of the ball bearing is in sliding contact with the first concave spherical portion in front of the first member and the second concave spherical portion in front of the second member. The first member is fastened to the aforementioned second member.