Winding – tensioning – or guiding – Reeling device – Fishing rod reel
Reexamination Certificate
2000-10-20
2003-01-28
Jillions, John M. (Department: 3654)
Winding, tensioning, or guiding
Reeling device
Fishing rod reel
C242S303000, C242S320000, C242S321000
Reexamination Certificate
active
06511007
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a double-bearing type reel used mainly for fishing of large fishes such as marlin and the like.
The double-bearing type reel is designed so that a spool rotates idle when a tension exceeding a predetermined value acts on a fishing line wound round the spool. The reason is that the line should be prevented from breaking when the line is pulled strongly by a fish. Accordingly, the double-bearing type reel has a built-in drag mechanism. In a sense, the drag mechanism is a clutch mechanism for allowing rotation of the spool when a rotary torque exceeding a predetermined value acts on the spool.
In a most general construction as the drag mechanism of the double-bearing type reel, a friction ring is fixed to a side face of the spool or to a disk fixed to a rotary shaft of the spool. According to this construction, when the spool is moved in an axial direction, the friction ring is pressed against a brake shoe to adjust rotary torque for rotating the spool to be large.
Further, a double-bearing type reel having a built-in drag mechanism using a electromagnetic clutch has been developed as described in Japanese Utility Model Publication Sho 62-38536. As shown in
FIG. 16
, this double-bearing type reel has a disk
03
of electric conductive material rotated together with a spool
01
and a magnet
04
disposed near the disk
03
. Accordingly, when the spool
01
is rotated, eddy current occurs in the disk
03
to produce a magnetic field. This magnetic field enlarges rotary torque of the disk
03
, therefore functions as a brake. The drag mechanism of this construction has a characteristic that the eddy current becomes larger and the braking function becomes stronger as rotational speed of the spool is increased.
The drag mechanism having the friction ring pressed against the brake shoe as well as the drag mechanism of electromagnetic clutch type has a fault that tension acting on the line becomes large as the line wound round the spool becomes little, because even if the drag mechanism rotates the spool with a constant torque, the diameter of winding of the line becomes small and tension of the line becomes large as the line wound round the spool becomes little. For example, if the diameter of winding of the line becomes half, tension of the line must be twice in order to rotate the spool at the same torque, because rotary torque given to the spool by the line is in proportion to the product of the diameter of winding of the line and the tension of the line.
FIG. 24
shows the fact that reversal torque of a conventional double-bearing type reel having the friction ring fixed to a side face of the spool becomes large as the diameter of the winding of the line becomes small.
FIG. 24
is a graph showing change of tension acting on the line when the line is paid out from the spool at a constant speed. The abscissa shows time, namely amount of pay out of the line. It is clear that tension of the line becomes large abruptly when the line is pulled out long and the diameter of winding becomes small as the time lapses.
This means that the line becomes apt to be broken as the line is paid out long and the diameter of winding on the spool becomes small. If the drag mechanism is adjusted to make the spool rotate easily for preventing the line paid out long from breaking, tension of the line becomes very small when the long line is wound round the spool to make the diameter of winding large, and the line is pulled out long by a fish unnecessarily. If the drag mechanism is adjusted so that the line is not pulled out long, tension of the line becomes large and the line is apt to be broken when the diameter of winding becomes small.
A cause of the above-mentioned evil is that the line is wound round the rotary spool. In a reel such as a spinning reel in which the spool is fixed and the line is wound round the spool using a rotary line roll, such an evil does not occur, because the tension of the line is determined by a radius of rotation of the line roll. The radius of rotation of the line roll is always constant regardless of the diameter of winding of the line wound round the spool. Therefore, in the spinning reel, tension of the line can be adjusted to constant regardless of the diameter of winding on the spool. However, the spinning reel can not be used for fishing of a large fish such as marlin and the like, because tension acting on the line is so strong that it is impossible to wind the line round the spool using the line roll reasonably.
In the double-bearing type reel, the spool is rotated to wind the line round the spool directly, therefore the double-bearing type reel can be used for fishing that a strong tension acts on the line. Since the double-bearing type reel is used for fishing of a large fish such as marlin and the like, the line is used in the very critical condition. Namely, the line is used in a condition that the line is apt to be broken very easily. Further, in the double-bearing type reel, a very long line of some hundreds meter is used in order to weaken the large fish enough. Therefore, the diameter of winding of the line wounded round the spool changes largely.
The double-bearing type reel is used in a very severe condition that the line pulled by the large fish is apt to be broken suddenly and tension of the line changes largely in accordance with the diameter of winding on the spool. Therefore, in trolling of the large fish, it is the true state that percentage of fish finally drawn up on the ship to fish caught on fishhooks is very low, below scores of percents. The most important characteristic required for the double-bearing type reel is how the fish caught on the fishhook can be recovered on the ship.
In order to solve such a difficult problem, the present applicant has been developed a double-bearing type reel as described in Japanese Patent No. 2835583. According to this double-bearing type reel, the construction is very simple, change of tension of the line caused by change of the diameter of winding of the line wound round the spool is little, and it is possible to draw and recover the large fish effectively.
As shown in
FIGS. 17-20
, this double-bearing type reel has a spool
01
for winding up a line, and a drag mechanism
05
slipping to rotate (reverse) the spool when a predetermined tension acts on the line wound round the spool
01
.
The drag mechanism
05
has all of the following constitutions (a)-(e).
(a) The drag mechanism comprises an inner shaft
06
, an outer ring
07
, a plurality of rollers
08
arranged between the inner shaft
06
and the outer ring
07
so as to roll, and a torque adjusting section
09
for moving the inner shaft
06
and the outer ring
07
relatively in the axial direction.
(b) The outer ring
07
and the inner shaft
06
have tapered roll surfaces
010
for the rollers
08
, and between the tapered roll surfaces
010
are arranged the rollers
08
so as to roll. The roll surface
010
has a taper angle of &agr; (FIG.
21
).
(c) The roller
08
disposed between the roll surfaces
010
is inclined against rotary axis of the outer ring
07
and the inner shaft
06
. The inclination angle of the roller against the rotary axis of the outer ring
07
and the inner shaft
06
is set to &bgr; (FIG.
21
).
(d) The torque adjusting section
09
presses the outer ring
07
and the inner shaft
06
to move them relatively in the axial direction. By the relative movement of the outer ring
07
and the inner shaft
06
, slip torque between the outer ring
07
and the inner shaft
06
is adjusted so that when a tension exceeding a predetermined value acts on the line wound round the spool
01
, the outer ring
07
and the inner shaft
06
slip to each other and the spool
01
rotates to pay out the wound line.
(e) The torque adjusting section
09
comprises a pressing ring
026
pressing the outer ring
07
in the axial direction through a thrust bearing
025
, a ring spring
027
abutting against the pressing ring
026
to push it, a nut member
028
movable in the axial dir
Jillions John M.
Ken Matsuura Racing Service Co., Ltd.
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