JPH0344040B2 - - Google Patents

Description

[Detailed description of the invention]

Since ancient times, rowing boats have been designed to move faster and more efficiently with less energy loss.
was installed on the outer end of the outrigger that protruded from the side of the boat, and the seat was a sliding seat. Boats and equipment were developed to minimize the width of the boat. This is currently considered the most efficient boat. In particular, boats other than the standard boats used in national athletic meet and high school championships, such as Natsuklufuoa and Schielfuoa, have no regulations regarding boat length, width, weight, etc., so they can be made freely. [Technical field to which the invention pertains] The present invention relates to the above-mentioned non-standard boat, and in particular, a rail is provided inside the boat in the longitudinal direction of the boat, a sliding seat is provided on the rail so as to be slidable, and This invention relates to an oar pivoting device for a sliding boat, in which the oar is pivoted by a roller lock to the end of an outrigger provided so as to protrude from the edge of the outrigger. [Prior Art] Conventionally, in the oar pivot device of this type of sliding boat, the outriggers were fixed and the rolling lock position was fixed, so the distance that the tip of the oar moved at one time, in other words, the distance that the oar tip moved at one time was fixed. The distance to row is short, and the rotational radius of the tip of the oar, or blade, is small, so the torque of rowing the oar per unit time is small, so the propulsive force and propulsion efficiency are correspondingly low, and the boat is propelled faster. There is a drawback that it cannot be done. [Object of the Invention] The present invention has been made to improve the above-mentioned drawbacks, and its purpose is to support the outrigger so that it can move in an arc, and to move the sliding seat back and forth in a straight line through the outrigger. By transmitting the reciprocating arc motion to the row lock, the distance of movement of the blade at the tip of the oar pivoted to the row lock is lengthened, and the radius of rotation of the rotational motion of the blade is lengthened, thereby propelling the boat faster. To provide a rotating outrigger oar pivot device for a sliding boat. [Configuration of the Invention] In order to achieve the above object, the device of the present invention has the following features:
As shown in FIGS. 3 to 3, a rail 4 is provided inside the boat 1 in the longitudinal direction of the boat, and a sliding seat 3 is provided on the rail 4 so as to be able to slide freely. In the oar pivot device for a sliding boat, the oar 2 is pivoted by a rotatable roller lock 10 at the end of an outrigger 9, which is provided at the end of the outrigger 9. A support part 8 is provided through which the fixed second shaft 7 protruding vertically upward is inserted and linked, and a roller lock 10 is rotatably received at one end outside of the support part 8. The other end, which is inward from the support part 8, curves downward along the inner wall of the boat 1 as it approaches the center of the boat 1, and further curves in the horizontal direction.
The other inner end is provided with a groove-shaped engagement portion 6 through which the first shaft 5 fixed to the lower part of the sliding sheet 3 and protruding vertically downward is inserted and slid. do. [Configuration of the Embodiment] Fig. 1 is a partially cut-away perspective view of a sliding boat equipped with the device of the present invention, and Fig. 2 is a front sectional view of an embodiment of the device of the present invention mounted on a sliding boat. FIG. 3 is a perspective view of the outrigger in the device of the present invention. First, to explain its structure, 1 is a boat, 4 is a rail provided inside the boat 1 in the longitudinal direction of the boat, 3 is a sliding seat provided on this rail 3 so that it can be slid freely, and 9 is an external part from the side of the boat. The outrigger 2 is an oar that is pivotally supported by a rotatable roller lock 10 provided at the end of the outrigger 9. In this embodiment, in such an oar pivot device for a sliding boat, the outrigger 9 is inserted into and linked with the second shaft 7 which projects vertically upward and has one end fixed to a proper position on the side wall of the boat 1. A support part 8 is provided, and the other end side inward from the support part 8 curves downward along the inner wall of the boat 1 as it approaches the center of the boat 1, and further curves in the horizontal direction. A groove-shaped engagement portion 6 is provided at the other inner end. In addition, a first shaft 5 fixed to the lower part of the sliding seat 3 and protruding vertically downward is connected to an outrigger 9.
A second shaft 7, which is inserted into the engaging portion 6 of the outrigger 9 and slid thereon, and whose one end is fixed to a proper position on the outer wall of the boat 1 and whose other end projects vertically upward, is inserted into the support portion 8 of the outrigger 9. collaborate. In the case of this embodiment, in the outrigger 9,
An engaging portion 6 provided at the other end inward from the support portion 8
The groove has a bifurcated shape that opens left and right, and the first shaft 5 is inserted into this bifurcated end, and one end has a bifurcated shape that opens vertically, and a roller lock 10 is inserted into this bifurcated end. It is being pinched. [Operation of Example] Next, the operation will be explained. First, the posture of the rower 11 at the beginning of rowing is as shown in the first diagram, with the upper body bent forward and the grip part of the oar 2
Extend your arms forward while holding a, and bend your legs with the soles of your feet on the stretcher 12 as far as you can to position the sliding seat 3 in front of the rower 11. In this position, next, raise your upper body to the rear of the rower 11 and pull the oar 2 with your arms, and at the same time gradually stretch your legs while moving the sliding seat 3 to the rear of the rower 11, that is, towards the boat's direction of travel. 4 Slide the top. Finally, when your legs are fully extended and the oar 2 is brought close to your chest, return to the original position you started rowing. The boat 1 is propelled by each rower 11 repeating this series of actions simultaneously. In the case of the present invention, each time the sliding sheet 3 slides on the rule 4, the first shaft 5 moves together with the sliding sheet 3, and the engaging portion 6 linked to the first shaft 5 moves along with the second shaft 5. It performs a reciprocating arc movement around the axis 7. Therefore, the rolling lock 10, which is the center of rotation of the oar 2, also moves in a reciprocating arc around the second shaft 7. In other words, the reciprocating linear motion of the sliding seat 3 is transmitted to the low lock 10 as a reciprocating arcuate motion via the outrigger 9 supported on the second shaft 7. Since the circular movement direction of the row lock 10 is opposite to the circular movement direction of the grip portion 2a of the oar 2, the blade 2b at the tip of the oar 2 is
The distance traveled per rotation is longer than with conventional outrigger fixed systems. That is, in the outrigger rotation method of the present invention, the distance that can be rowed in one row is longer than in the conventional method, and the propulsion efficiency is improved accordingly. [Effects of Examples] In order to confirm this, the results of experiments conducted on the conventional method and the method of the present invention are shown in the first example.
Shown in Table and Table 2. Table 1 shows the results of 10 tests of the oar rowing torque per unit time with respect to the oar load torque for the conventional system, and Table 2 shows the oar load torque for the system of the present invention. This shows the results of measuring the torque of oar rowing per unit time for the same number of times. However, all of these torques represent components in the boat's traveling direction. Incidentally, to explain the equipment and method of this experiment, first, one end of the steel wire is fixed to the center of the blade 2b, the steel wire is pulled in the boat's traveling direction so that there is no slack, and the other end is connected to a torque meter. wrapped around a rotating drum fixed to the rotating shaft of
The output terminal of the torque meter and the input terminal of the pen recorder are connected with a communication cable, and the rotating shaft of the brake mechanism is fixed to the rotating shaft of the torque meter, and the brake mechanism is connected to the , 19 and 20 kg・m of load torque, respectively, to form an experimental device. This load torque corresponds to the mechanical resistance of water acting on the blades in the case of an actual rowing boat on water. However, in this experiment, the oars 2 were not immersed in water, and the boat 1, torque meter, and brake mechanism were fixed to the floor in the laboratory so that they would not move during the experiment. Furthermore, an experiment was conducted to measure the torque of rowing the oars for two types of outriggers: a conventional outrigger fixed type and an outrigger rotating type according to the present invention. Next, in the experimental method, as described above, the oar 2 with steel wire fixed to the blade is rowed by the rower 11 in exactly the same manner as when competing on water. As shown in the first figure, bend your upper body forward, extend your arms forward while grasping the grips 2a of the oars 2, and row the sliding seat 3 by fully bending your legs with the soles of your feet on the stretcher 12. Position it in front of hand 11. Next, in this position, raise your upper body to the rear of the rower 11 and pull the oar 2 with your arms, and at the same time gradually stretch your legs while moving the sliding seat 3 to the rear of the rower 11, that is, to the rail toward the boat's direction. 4 Slide the top. Finally, the experiment was completed by fully stretching the legs and bringing Oar 2 close to the chest. During this time, the steel wire fixed to the blade 2b is pulled in the opposite direction of the boat's movement as the blade moves, and a rotating drum fixed to the rotating shaft of the torque meter and around which the steel wire is wound is rotated. An electric signal corresponding to the torque generated in the torque meter is outputted to the pen recorder over time, and the recorded torque data for rowing the oar is read later, and the torque for rowing the oar per unit time, that is, per second, is calculated. calculate. The measurement results obtained by repeating the experiment 10 times under the same conditions as described above and the average value of the 10 measurement results under the same conditions are shown in Table 1 for the conventional outrigger fixing method, and for the present invention. Table 2 shows the outrigger rotation method of the above, and the average values are plotted on a graph for each of the conventional outrigger fixing method and the outrigger rotation method of the present invention, and the curves connected by curves are shown in Figure 4, respectively. , b.

【table】

〔Effect of the invention〕

As described above, according to the present invention, the rail 4 is provided inside the boat 1 in the longitudinal direction of the boat, and the sliding seat 3 is provided on the rail 4 so as to be slidable and protrudes outward from the boat. In the oar pivot device for a sliding boat, in which the oar 2 is pivoted by a row lock 10 that is freely rotatable at the end of the outrigger 9 provided, as the rower 11 rows the oar, the oar pivot device provided at the tip of the outrigger 9 Because the row lock 10 moves in an arc in the opposite direction of the boat's movement, the distance the blade 2b moves during one row of the oar 2 is longer than in the conventional outrigger fixing system, and the radius of rotation of the blade becomes larger. Since the motion becomes closer to a linear motion, the propulsive force increases by the amount of torque for rowing the oars per unit time, and as a result, the boat can be propelled faster.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway perspective view of a sliding boat equipped with the device of the present invention, Fig. 2 is a front cross-sectional view of one embodiment of the device of the present invention attached to a sliding boat, and Fig. 3 is the device of the present invention. FIG. 4 is a perspective view of the outrigger shown in FIG. 4, which shows the average value of the measurement results of the oar rowing torque per unit time with respect to the oar load torque for the conventional method and the present invention method. 1...Boat, 2...Oar, 2a...Grip, 2
b...Blade, 3...Sliding sheet,
4...Rail, 5...First shaft, 6...Engagement part, 7
...Second axis, 8...Support, 9...Outrigger, 10...Rorokku, 11...Roarer, 12
...Stretchia.

Claims (1)

[Scope of Claims] 1. A rail 4 is provided inside the boat 1 in the longitudinal direction, and a sliding seat 3 is provided on the rail 4 so as to be freely slidable, and an outrigger 9 is provided so as to protrude outward from the gunwale. In an oar pivoting device for a sliding boat, in which an oar 2 is pivoted by a row lock 10 at the end of the outrigger 9, the outrigger 9 has a second shaft 7 which projects vertically upward and has one end fixed to a proper position on the outboard wall of the boat 1. A support part 8 for insertion and connection is provided, a roller lock 10 is rotatably provided at one end outside the support part 8, and the other end inside the support part 8 is attached to the boat. As it approaches the center of the boat 1, it curves downward along the inner wall of the boat 1, further curves in the horizontal direction, and at the other end of the inner side there is a vertically downward curve fixed to the lower part of the sliding seat 3. An outrigger rotary oar pivot device for a sliding boat, characterized in that a groove-shaped engagement portion 6 is provided through which a protruding first shaft 5 is inserted and slid.