JP2013192507A - Double-bearing type reel for fishing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double-bearing type reel for fishing, capable of improving durability in addition by reducing a load acting on a bearing (ball bearing) while improving the free-rotating performance of a spool.SOLUTION: In a double-bearing type reel for fishing, a relational expression of 0.159≤φB/φA≤0.260 is established, wherein φA is the average diameter of a winding area S of a spool 5, and φB is the outer diameter of an outer ring 7a of a ball bearing 7. A relational expression of 0.694≤L1/L≤0.780 is also established, wherein L is the distance from an inner peripheral surface 32 of a winding drum portion 5b of the spool 5 on which a fishing line is wound to the central axis O of a spool shaft 5a, and L1 is the length of a thin rim 5d radially extending from the spool shaft 5a side to connect the outer peripheral surface of a spool shaft support portion 5c fixing the spool shaft 5a to the inner peripheral surface 32 of the winding drum portion 5b.

Description

  The present invention relates to a fishing double-bearing type reel in which a fishing line is wound around a spool that is rotatably supported via a ball bearing between both side plates of the reel body, and in particular, reduces the rotational resistance of the spool during casting. The present invention relates to a double-bearing type reel for fishing.

  The double-bearing type reel for fishing generally has durability enough to handle normal fishing line winding and casting operations and free rotation performance of the spool (reduction of spool rotation resistance (hereinafter also referred to as cast resistance)). It is required that it can be maintained. In particular, high free-rotating performance is required for fishing that involves casting to accurately perform a throw operation at a point aimed at a light device.

  In relation to such free rotation, for example, in a fishing reel disclosed in Patent Document 1, a bearing and a bearing having a smaller diameter than the bearing are held in a concave bearing support portion formed in the reel body. By mounting an annular support having a predetermined wall thickness in an exchangeable manner, the spool shaft (spindle rotation shaft) can be rotatably supported via the bearing or the small-diameter bearing. The improvement of the free rotation performance is aimed at.

Japanese Patent No. 4356837

  In Patent Document 1, by using a small-diameter bearing, the frictional resistance during rotation inside the bearing is reduced, and the free rotation performance of the spool is improved. However, the frictional resistance is not the only factor that affects the free rotation performance of the spool. The moment of inertia of the spool also greatly affects the free rotation performance of the spool. In Patent Document 1, the moment of inertia of the spool is not considered in order to improve the free rotation performance of the spool. Even if the free rotation performance of the spool is improved, if the durability is neglected, the required performance that can sufficiently cope with the normal fishing line winding operation and casting operation as described above cannot be achieved.

  The present invention has been made paying attention to the above-described problems, and can improve the durability by reducing the load acting on the bearing (ball bearing) while improving the free rotation performance of the spool. An object is to provide a double bearing type reel for fishing.

  In order to achieve the above-described object, the invention according to claim 1 is a fish in which both ends of a spool shaft fixed to a spool around which a fishing line is wound are rotatably supported by a reel body via a ball bearing. A double-bearing type reel for fishing, wherein the average diameter of the spool winding region of the spool is φA, and the outer diameter of the outer ring of the ball bearing is φB, a relational expression of 0.159 ≦ φB / φA ≦ 0.260 It is characterized by that.

  According to the first aspect of the present invention, when the relational expression 0.159 ≦ φB / φA ≦ 0.260 is satisfied, that is, the outer diameter φB of the outer ring of the ball bearing with respect to the average diameter φA of the spool winding region of the spool. By keeping the ratio φB / φA within these ranges low (15.9% to 26%), the moment of inertia around the spool axis of the spool in consideration of the state that moisture is contained in the fishing line during actual fishing Since it can be reduced and the moment of inertia of the ball bearing can be reduced, the cast resistance can be extremely reduced and the free rotation performance of the spool can be greatly improved. It becomes possible.

  The invention according to claim 2 is the invention according to claim 1, wherein the distance from the inner peripheral surface of the spool body of the spool around which the fishing line is wound to the center axis of the spool shaft is L, The length of the thin rim extending in the radial direction from the spool shaft side so as to be connected from the outer peripheral surface of the spool shaft support portion that fixes the spool shaft of the spool to the inner peripheral surface of the winding drum portion is L1 Then, the relational expression of 0.694 ≦ L1 / L ≦ 0.780 is established.

  According to the second aspect of the invention, the same effect as that of the first aspect of the invention can be obtained, and from the fishing line by satisfying the relational expression of 0.694 ≦ L1 / L ≦ 0.780. When the spool receives the shock, the shock is mitigated by the deformation of the rim, so that a large impact force is hardly transmitted to the ball bearing, and the durability of the ball bearing can be improved. In particular, when the outer diameter of the outer ring of the ball bearing is reduced, the ball (roller) diameter of the ball bearing is also reduced and the durability is reduced (the period during which smooth rotation can be sustained is shortened). Solvable.

  According to a third aspect of the invention, in the invention of the first or second aspect, the winding is performed from an outer peripheral surface of a spool shaft support portion that fixes the spool shaft of the spool around which the fishing line is wound. The thin rim extending in the radial direction from the spool shaft side so as to be connected to the inner peripheral surface of the body portion is provided with a concave groove or a through hole.

  According to the third aspect of the invention, the same effect as that of the first or second aspect of the invention can be obtained, and the rigidity of the rim is lowered due to the presence of the concave groove or through hole. The rim is easily deformed. Therefore, when the spool receives an impact from the fishing line, the impact can be reduced by the deformation of the rim, and the transmission of the impact force to the ball bearing can be suppressed. Therefore, the durability of the ball bearing can be improved.

  The invention according to claim 4 is the invention according to claim 3, wherein at least a part of the concave groove or the through hole provided in the rim is a connection region between the winding drum portion and the rim. It is provided in.

  According to the fourth aspect of the present invention, the same effect as that of the third aspect of the invention can be obtained, and the connection (joining) region between the winding drum portion and the rim that tends to have high rigidity (general) Is a so-called R-shaped connection region having a predetermined curvature that increases the wall thickness), and is provided with a concave groove or through-hole. When the spool receives an impact from the fishing line, the impact can be sufficiently mitigated by the deformation of the rim, and the transmission of the impact force to the ball bearing can be further suppressed.

  According to the fishing double bearing type reel of the present invention, it is possible to improve the durability by reducing the load acting on the bearing (ball bearing) while improving the free rotation performance of the spool.

It is sectional drawing which shows roughly the internal structure of the double bearing type reel for fishing which concerns on the 1st Embodiment of this invention. (A) is a front view of the spool which has the spool axis | shaft of the double bearing type reel for fishing of FIG. 1, (b) is a side view of the spool of (a). FIG. 3 is a cross-sectional view of the spool of FIG. 2 (a cross-sectional view when the spool is cut along a plane extending in the axial direction of the spool shaft and extending in a radial direction perpendicular to the spool shaft (a plane including the axis of the spool shaft)); . The front view of the spool which has the spool axis | shaft of the double bearing type reel for fishing which concerns on the 2nd Embodiment of this invention, (b) is a side view of the spool of (a), (c) is A part of (a). It is an expanded sectional view. Sectional drawing corresponding to FIG. 3 of the spool which has the spool shaft of the double bearing type reel for fishing which concerns on the 3rd Embodiment of this invention, (b) is a front view of the spool of (a). Sectional drawing corresponding to FIG. 3 of the spool which has a spool shaft of the double bearing type reel for fishing which concerns on the 4th Embodiment of this invention, (b) is a front view of the spool of (a).

Hereinafter, embodiments of a dual bearing reel for fishing according to the present invention will be specifically described with reference to the drawings.
1 to 3 show a first embodiment of the present invention. As shown in FIG. 1, a reel body 1 of a dual bearing reel for fishing according to the present embodiment includes left and right frames 2a and 2b and left and right covers 3a and 3b covering the frames 2a and 2b. Side plates 1A and 1B are provided. Between both side plates 1A and 1B (left and right frames 2a and 2b), a spool shaft 5a is rotatably supported via two ball bearings 7 and 7 (same ball bearings in this embodiment) on both sides as bearings. A spool 5 around which a fishing line is wound is integrally mounted on the spool shaft 5a. As shown in FIGS. 1 to 3, the spool 5 includes a winding drum portion 5b around which the fishing line is wound, and a spool winding region S extending along the radial direction from the winding drum portion 5b together with the winding drum portion 5b. A spool so as to connect the flange portion 5e to be formed, a cylindrical spool shaft support portion 5c through which the spool shaft 5a is inserted in a non-rotating state, and the spool shaft support portion 5c and the winding drum portion 5b. And a thin rim 5d extending in the radial direction from the shaft support portion 5c. As shown in FIG. 3, each ball bearing 7 includes an outer ring 7a fixed to the reel body 1, an inner ring 7b fitted to the outer periphery of the spool shaft 5a, an outer ring 7a and an inner ring 7b. A plurality of ball-shaped rolling elements (rollers) 7c that are supported so as to be able to roll between each other.

  As shown in FIG. 1, a pinion gear 8 that is movable along the axial direction of the spool shaft 5a is attached to the end of the spool shaft 5a that protrudes from the right frame 2b. The pinion gear 8 is engaged with the spool shaft 5a by a known clutch mechanism 10 and engaged with the spool shaft 5a (power transmission state; see FIG. 1) and the spool shaft 5a. It is moved between the disengaged position (power cut-off state) where the state is released. The pinion gear 8 is engaged with a drive gear 15 that is rotatably attached to a handle shaft 12 that is rotatably supported on the right side plate 1B via a bearing 12a. When the handle 13 provided at the distal end is rotated, the spool shaft 5a is rotationally driven through the handle shaft 12, the drive gear 15, and the pinion gear 8 made of brass, for example, and the spool 5 is rotated accordingly. The The drive gear 15 is rotatably mounted with a desired braking force applied to the handle shaft 12 by the drag mechanism 20.

  A level wind mechanism 17 is installed between the left and right side plates 1A and 1B on the front side of the spool 5. The level wind mechanism 17 includes a fishing line guide body 17a for inserting and guiding the fishing line. The fishing line guide body 17a is engaged with a worm shaft 17d that is rotationally driven via a gear 17b provided at the base end portion of the handle shaft 12 and an input gear 17c supported by the right frame 2b. Is rotated, the worm shaft 17d is rotationally driven through the gear 17b and the input gear 17c, and the fishing line guide body 17a engaged therewith is reciprocated between the left and right side plates 1A, 1B. Accordingly, when the handle 13 is rotated, the spool 5 is rotationally driven as described above, so that the fishing line is evenly wound around the spool 5 via the synchronously driven fishing line guide body 17a.

  In the double-bearing type reel for fishing according to the present embodiment, the spool shaft 5a around the spool shaft 5a (the central axis O of the spool shaft 5a) around the state where moisture is contained in the fishing line during actual fishing is taken into consideration. A device for improving the free rotation performance of the spool 5 is provided by reducing the moment of inertia (the moment of inertia in a state where moisture is contained in the fishing line during actual fishing). Specifically, as shown in FIG. 3, when the average diameter of the spool region S of the spool 5 is φA and the outer diameter of the outer ring 7a of the ball bearing 7 is φB, 0.159 ≦ φB / φA ≦ 0. .. 260 so that the relational expression is established. The “moment of inertia when water is contained in the fishing line during actual fishing” means the moment of inertia of the spool itself and the moment of inertia of the wet fishing line, and does not take into account the fishing line. In this case, the smaller the outer diameter of the fishing line winding body portion 5b, the smaller the moment of inertia. However, the inventor has conducted a number of experiments to determine whether the spool itself and a spool around which a fishing line containing moisture is wound. Then I found that the evaluation was the opposite.

  Here, the thread winding region S of the spool 5 is a concave region (a region indicated by hatching on the lower side of FIG. 3) where the fishing line between the outer peripheral surface 30 of the winding body 5 b and the flange portion 5 e can be wound. ). The average diameter φA of the spool winding region S of the spool 5 is equal to the diameter φC of the outer peripheral surface 30 of the winding drum portion 5b when the outer peripheral surface 30 of the general winding drum portion 5b is parallel to the spool shaft 5a. It is obtained by an average value with the diameter φD of the maximum outer peripheral portion 34 which is the maximum outer diameter portion of the flange portion 5e. Note that when the outer peripheral surface 30 of the winding drum portion 5b has a complicated shape (a shape that is not parallel to the spool shaft 5a), the fishing line when the spool 5 is cut at an arbitrary plane passing through the spool shaft 5a is wound. The average diameter φA of the spool region S of the spool 5 by a value twice as large as the dimension from the centroid G to the spool axis O in the cross-sectional shape of the rotated portion (cross-sectional portion shown by hatching in the lower side of FIG. 3) Can be defined.

  The outer diameter φB of the outer ring 7a of the ball bearing 7 is the same as that of the outer ring 7a of each ball bearing 7 when the ball bearings 7 on both sides of the spool shaft 5a have the same diameter as in the present embodiment. Although it is the diameter φB, it is not always necessary to use the same one, and it may be different, and in that case, it is defined by the average value of the outer diameters of the outer rings of these two ball bearings 7. When a plurality of ball bearings 7 that support the spool shaft 5a are arranged on one side of the spool shaft 5a, the clearance between the respective ball bearings 7 and the spool shaft 5a is taken into consideration, and the spool shaft 5a It is defined by the outer diameter of the outer ring of the ball bearing 7 that is substantially functioning with respect to support.

  In addition, in the double bearing type reel for fishing according to the present embodiment, a device for improving the durability of the ball bearing 7 is also provided. Specifically, as shown in FIG. 3, the distance from the inner peripheral surface 32 of the winding body 5b of the spool 5 around which the fishing line is wound to the center axis O of the spool shaft 5a (the winding body radius). L, a thin rim 5d extending in the radial direction from the spool shaft 5a side so as to be connected from the outer peripheral surface of the spool shaft support portion 5c for fixing the spool shaft 5a of the spool 5 to the inner peripheral surface 32 of the winding drum portion 5b. The dimension relationship is set so that the relational expression of 0.694 ≦ L1 / L ≦ 0.780 is established when the length (rim height) of L is L1.

  Thus, in this embodiment, by satisfying the relational expression of 0.159 ≦ φB / φA ≦ 0.260, that is, the outer diameter of the outer ring 7a of the ball bearing 7 with respect to the average diameter φA of the spooling region S of the spool 5. By keeping the ratio of φB φB / φA within these ranges (15.9% or more and 26% or less), the spool 5 around the spool shaft 5a of the spool 5 in consideration of the state in which moisture is contained in the fishing line during actual fishing. Since the moment of inertia can be reduced and the moment of inertia of the ball bearing 7 can also be reduced, the cast resistance can be made extremely small, and the free rotation performance of the spool 5 can be greatly improved. Casting can be performed. When the inner peripheral surface 32 of the winding drum portion 5b is formed in a complicated shape that is not parallel to the spool shaft, the L and L1 are defined by the portion of the inner peripheral surface 32 that is closest to the rim 5d. .

  The present inventors have conducted experiments that demonstrate such effects. Table 1 below shows data results of an evaluation experiment in which cast resistance was compared between the present invention and a conventional example. In this experiment, four conventional examples (conventional examples 1 to 4 having different ratios φB / φA) and four examples of the present invention satisfying the relational expression 0.159 ≦ φB / φA ≦ 0.260 (ratio φB / Invention Examples 1 to 4) having different φA were compared in terms of cast resistance. The cast resistance is evaluated in five stages. Evaluation 1 in Table 1 has the highest cast resistance, evaluation 5 in Table 1 has the lowest cast resistance, and gradually (or step by step) from Evaluation 5 to Evaluation 1. ) Means that the cast resistance will increase. Specifically, as a criterion for each evaluation value, evaluation 1 uses a lure with a heavy weight and cast resistance is at a level that does not bother the operation, and evaluation 2 uses a lure with a medium weight to cast The resistance is at a level that does not bother you during operation. Evaluation 3 uses a lure with a medium weight, and the cast resistance does not bother you when you repeat the throwing operation until the fishing line is sufficiently wet. Evaluation 4 is a level that uses a lure with a light weight, and cast resistance does not become an operational problem even when the fishing line is sufficiently wet. Evaluation 5 uses a lure with an ultra-light weight and the fishing line is The standard was such that the cast resistance was not an operational problem even in a sufficiently wet condition.

  As can be seen from Table 1, in the four inventive examples satisfying the relational expression of 0.159 ≦ φB / φA ≦ 0.260 (present invention examples 1 to 4 with different ratios φB / φA), the cast resistance The evaluation values were 4 and 5, and a sufficient reduction in cast resistance was demonstrated. In particular, a good evaluation is obtained in a state where a light lure (including a worm) is used and the fishing line is wet. On the other hand, when the ratio φB / φA exceeded 0.260, the cast resistance suddenly increased (Evaluation 4 of Invention Example 1 → Evaluation 1 of Conventional Example 4). In this experiment, comparison between Comparative Example 1 and Invention Examples 1 to 4 was also performed. Comparative Example 1 in Table 1 is an example in which the ratio φB / φA is less than 0.159, and the cast resistance shows an intermediate value of evaluation 3, but the spool shaft 5a lacks rigidity and the spool 5 has runout. Occurred.

  Further, in the present embodiment, by satisfying the relational expression of 0.694 ≦ L1 / L ≦ 0.780, that is, from the inner peripheral surface 32 of the winding drum portion 5b of the spool 5 to the central axis O of the spool shaft 5a. By securing a large ratio L1 / L of the length L1 of the rim 5d to the distance L within the above range (69.4% to 78%), in other words, the ratio of the length L1 of the rim 5d is increased. By doing so, when the spool 5 receives an impact from the fishing line, the impact can be mitigated by the deformation of the rim 5d, so that a large impact force can hardly be transmitted to the ball bearing 7, and the durability of the ball bearing 7 can be improved. Can be improved. In particular, when the outer diameter of the outer ring of the ball bearing is reduced, the ball (roller) diameter of the ball bearing is also reduced and the durability is reduced (the period during which smooth rotation can be sustained is shortened). Solvable. Further, since the impact force on the ball bearing 7 is reduced, the effect of improving the durability of the entire reel can be obtained as a result.

  Further, when the hooking is performed in a state where the fishing line winding end with respect to the spool 5 is on the flange portion 5e side, or when the fishing line is aligned in a rooted state, a large load is applied to the spool 5 and the spool shaft 5a. . Specifically, a bending moment M (see FIG. 3) acts on the spool 5 and a large load is applied to the ball bearing 7. However, as in the present embodiment, the length L1 of the rim 5d is ensured and the bending moment is increased. By making the rim 5d easily deformed during the action of M, the instantaneous impact force can be reduced by the deformation of the rim 5d, and the load acting on the ball bearing 7 can be reduced. In particular, in the case of the present embodiment in which the average diameter φA of the spooling region S of the spool 5 is increased, the fishing line winding amount is small. Therefore, when a large fish is caught, all the fishing line may be pulled out. Since the drag does not function at all when the coupling end P (winding base point, see FIG. 3) is located on the outer peripheral side of the winding body 5b of the spool 5 (near the flange 5e), it is very large. A load may be suddenly applied, and the above configuration functions particularly effectively in such a case.

  The present inventor has also made other experimental data demonstrating such effects. Table 2 below shows data results of an evaluation experiment comparing durability with cast resistance. In this experiment, 13 examples of the present invention satisfying the relational expression of 0.159 ≦ φB / φA ≦ 0.260. The cast resistance and the durability were compared by changing the value of the ratio L1 / L between the present invention example 1a to the present invention example 4d having different ratios φB / φA. In this experiment, four types of examples of the present invention were compared. The four types a (Invention Examples 1a to 4a) are those in which L1 / L is a general type (corresponding to Inventive Examples 1 to 4 in Table 1 of the previous experiment), and the four types b (present examples) Invention Examples 1b to 4b) are of a type in which L1 / L is relatively large, and four types c (Invention Examples 1c to 4c) are of a type in which L1 / L is further increased. One type d (Invention Example 1d) is a type in which L1 / L is made larger than type c. In this case, the dimensional relationship is set so that the relational expression of 0.694 ≦ L1 / L ≦ 0.780 is established with respect to type b and type c. On the other hand, in type a, the value of ratio L1 / L was set to less than 0.694, and in type d, the value of ratio L1 / L was set to a value exceeding 0.780.

  Further, in this embodiment, cast resistance was evaluated in five stages based on the same criteria as in the experiment of Table 1 above, and durability was also evaluated in five stages. Evaluation 1 in Table 2 has the lowest durability, Evaluation 5 in Table 2 has the highest durability, and the durability gradually decreases from Evaluation 5 to Evaluation 1 (or stepwise). . Specifically, as a reference for each evaluation value of durability, a judgment is made by a rotation feeling and a cast evaluation at the time of winding the handle after throwing 2000 with a lure. Is a level with a large cast resistance, evaluation 2 is a level that feels gorgeous and cast resistance during rotation, evaluation 3 is a level that feels a slight sensation during rotation and slightly feels cast resistance, evaluation 4 was evaluated on the basis of a level that was smooth during rotation but felt a faint sensation and hardly felt cast resistance, and rating 5 was a level where neither rotation feel nor cast resistance felt change.

  As can be seen from Table 2, regarding the cast resistance, all the inventive examples satisfy the relational expression of 0.159 ≦ φB / φA ≦ 0.260, so that the evaluation value is high (only evaluation values 4 and 5). In the present invention example (4d) of type d in which the ratio L1 / L exceeds 0.780, the evaluation is 1 contrary to the conventional trend. If the ratio of the rim 5d becomes too long, not only may there be a problem with the durability of the rim 5d, but also the outer diameter of the spool shaft 5a and the connecting portion between the rim 5d and the spool shaft 5a and the winding drum portion 5b. It can be seen from Table 3 below that it is difficult to obtain a sufficient thickness, and that a problem arises in durability other than the ball bearing 7. On the other hand, in the present invention examples (1a to 4a) of the type a having a ratio L1 / L of less than 0.694, the durability suddenly decreased (Evaluation 4 of Invention Example 1b → Evaluation 1 of Invention Example 4a).

  Table 3 below shows various dimensions of the examples in Tables 1 and 2. In Table 3, the outer diameter φD of the spool (see FIG. 3), the depth h of the winding drum portion 5b (see FIG. 3), the outer diameter φd of the spool shaft 5a (see FIG. 3), the spool shaft support portion 5c. Specific numerical values such as the wall thickness t2 (see FIG. 3) and the wall thickness t1 of the winding drum portion 5b are also shown.

  FIG. 4 shows a spool 5 having a spool shaft 5a of a dual bearing reel for fishing according to a second embodiment of the present invention. As shown in the figure, in the present embodiment, a plurality of through holes 50 are formed on the radially outer side of the rim 5d of the spool 5 with a predetermined angular interval along the circumferential direction thereof. Each of these through holes 50 extends in parallel with the axial direction of the spool shaft 5a, and a part thereof is located in a connection region 60 between the winding drum portion 5b and the rim 5d. In particular, in the present embodiment, the connection region 60 is formed as a so-called R-shaped region R having a predetermined curvature, and each through hole 50 penetrates the rim 5d so as to cut out a part of the region R. Yes.

  As described above, according to the present embodiment, the rigidity of the rim 5d can be lowered due to the presence of the through hole 50, so that the rim 5d can be easily deformed. Therefore, when the spool 5 receives an impact from the fishing line, the impact is reduced. Can be sufficiently relieved by deformation of the rim 5d, and transmission of impact force to the ball bearing 7 can be relieved. Therefore, the durability of the ball bearing 7 can be improved. In particular, in the present embodiment, since each through hole 50 penetrates the rim 5d so as to cut out a part of the R-shaped connection region R whose thickness is increased, the effect of reducing the rigidity is great. The effect is promoted. Further, the thinning effect on the outer peripheral side can contribute to a decrease in the moment of inertia of the spool 5 and can contribute to a reduction in cast resistance.

  FIG. 5 shows a spool 5 having a spool shaft 5a of a double bearing type reel for fishing according to a third embodiment of the present invention. As illustrated, in the present embodiment, a concave groove 52 is provided in the rim 5 d of the spool 5. The groove 52 is directed toward the rim 5d in a direction perpendicular to the axial direction of the spool shaft 5 (a direction intersecting the axial direction of the spool shaft 5a) with the outer peripheral surface 30 of the winding drum portion 5b of the spool 5 as a base point. It extends to reach the rim 5d and is formed as an annular groove located at the center of the outer peripheral surface 30 of the winding drum portion 5b (the portion to which the rim 5d is connected). Even such a groove 52 can contribute to the deformation (decrease in rigidity) of the rim 5d. Therefore, when the spool 5 receives an impact from the fishing line, the impact is sufficiently mitigated by the deformation of the rim 5d. Therefore, transmission of impact force to the ball bearing 7 can be suppressed. Therefore, the durability of the ball bearing 7 can be improved. Further, the thinning effect on the outer peripheral side can contribute to a decrease in the moment of inertia of the spool 5 and can contribute to a reduction in cast resistance.

  FIG. 6 shows a spool 5 having a spool shaft 5a of a dual bearing reel for fishing according to a fourth embodiment of the present invention. As illustrated, the present embodiment is a combination of the second embodiment and the third embodiment, and the groove 52 in the third embodiment is an R-shaped connection between the winding body 5b and the rim 5d. A plurality of through-holes extending beyond the region and arranged radially outside the rim 5d at predetermined angular intervals along the circumferential direction, and predetermined along the circumferential direction at the center of the winding drum portion 5b A composite hole 52A formed as a plurality of grooves communicating with the through-holes arranged at an angular interval is provided. Therefore, the same effect as the second and third embodiments can be obtained.

  Table 4 below shows a comparison of the durability of the first to fourth embodiments described above (the durability of the ball bearing 7 associated with the above-described effects). As can be seen from Table 4, the second to fourth embodiments (Examples 2 to 4) in which the rim 5d is provided with a concave groove or through-hole are all concave grooves or through-holes in the rim 5d. The durability is improved as compared with the first embodiment (Example 1) in which is not provided. Since Table 4 is a comparison with the first embodiment (Example 1), the durability evaluation of the first embodiment (first example) is not shown in Table 4. The improvement in durability of the other second to third embodiments (examples) is indicated by ○ in Table 4.

  As mentioned above, although embodiment of this invention has been described, this invention is not limited to embodiment mentioned above, A various deformation | transformation can be implemented in the range which does not deviate from the summary. For example, the number, shape, and arrangement of the concave grooves and through holes described above are arbitrary. In the above-described embodiment, the spool and the spool shaft are configured as separate members, but they may be integrally formed.

DESCRIPTION OF SYMBOLS 1 Reel body 5 Spool 5a Spool shaft 5b Winding trunk | drum 5c Spool shaft support part 5d Rim 5e Flange part 7 Ball bearing 7a Outer ring 32 Inner peripheral surface 50 (52A) Through-hole 52 (52A) Concave groove S Thread winding area

Claims (4)

A double-bearing type fishing reel in which both ends of a spool shaft fixed to a spool around which a fishing line is wound are rotatably supported by a reel body via a ball bearing,
When the average diameter of the spool area of the spool is φA and the outer diameter of the outer ring of the ball bearing is φB,
0.159 ≦ φB / φA ≦ 0.260
A double-bearing type reel for fishing, characterized by the fact that L is the distance from the inner peripheral surface of the winding drum portion of the spool around which the fishing line is wound to the central axis of the spool shaft, and the winding is performed from the outer peripheral surface of the spool shaft support portion that fixes the spool shaft of the spool. When the length of the thin rim extending in the radial direction from the spool shaft side so as to be connected to the inner peripheral surface of the trunk portion is L1,
0.694 ≦ L1 / L ≦ 0.780
The fishing double-bearing type reel according to claim 1, wherein:   A thin rim extending in the radial direction from the spool shaft side so as to be connected from the outer peripheral surface of the spool shaft support portion for fixing the spool shaft of the spool around which the fishing line is wound to the inner peripheral surface of the winding drum portion The double-bearing type reel for fishing according to claim 1 or 2, wherein a concave groove or a through-hole is provided in the fishing rod.   The double bearing type for fishing according to claim 3, wherein at least a part of the concave groove or the through hole provided in the rim is provided in a connection region between the winding drum portion and the rim. reel.

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