JPH0786B2 - Rowing ergometer - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a rowing ergometer for measuring maximum oxygen uptake, which is an index of whole-body endurance, by boating exercise.

[Background Art] It is generally known that an index of whole body endurance can be obtained by measuring the maximum oxygen uptake amount as a cardiopulmonary function. The maximum oxygen uptake is obtained by continuing exercise while gradually increasing the load and measuring the oxygen uptake at the time when the cardiopulmonary function reaches the limit point.

Conventionally, a rowing ergometer has been provided as an apparatus for performing such measurement. This device is provided with a seat portion on which the measurer sits and an oar that the measurer holds with his / her hand so that the measurer can perform rowing exercises.
By the way, since the general measurer does not have strong muscle strength like a boat player, when performing rowing exercise, the muscle strength reaches the limit point before the cardiorespiratory function reaches the limit point. There is a problem that the maximum oxygen uptake cannot be measured because the rowing exercise cannot be continued. In order to solve this problem, the present inventor focused on the point that the exercise amount (work rate) and the oxygen intake amount have a correlation, and that the age and the maximum heart rate have a correlation. I applied for a measuring device first. The device disclosed in the previous application requires the measurement of the amount of exercise as described above, and by accurately measuring the amount of exercise, the accurate value of the maximum oxygen uptake is measured. However,
Generally, there is a problem in that an accurate measurement of the momentum requires a complicated and expensive device. Therefore, the present invention is a further improvement of the device disclosed in the previous application to allow accurate and easy measurement of momentum.

[Object of the Invention] The present invention has been made in view of the above points, and an object of the present invention is to accurately measure the amount of exercise when measuring the maximum oxygen intake of a measurer by boating exercise. It is to provide an inexpensive rowing ergometer that is easy to perform.

DISCLOSURE OF THE INVENTION (Structure) A rowing ergometer according to the present invention includes a base in which a tilt angle with respect to a horizontal plane can be freely set, a seat portion provided on the base so as to be movable in a tilt direction, and a seat. All equipped with a footrest attached to the base so that both feet of the measurer seated on the base can be placed, and a grip that can be grasped with both hands by the measurer so that it can be advanced and retracted from the housing connected to one end of the base in the tilt direction. , A pitch signal generating means for intermittently outputting a pitch signal by sound or light, a personal data input section for inputting the weight, age and sex of the measurer, and a measurer's rowing motion in response to the notification signal Exercise amount calculation means to calculate the exercise amount from the number of repetitions, pulse detection means to detect the pulse of the measurer, and the maximum oxygen uptake amount from the measurer's weight, age, sex, exercise amount and pulse rate. Calculation The oxygen intake amount calculating means, the seat moving range restricting means for restricting the moving range of the seat portion, and the all-advancing / retreating range restricting means for restricting the advancing / retreating range of the oar from the housing. It is connected so that its position can be adjusted in the forward / backward direction of the oar, and the footrest is attached to the base so that its position can be adjusted in the moving direction of the seat portion, without strengthening muscle strength. This makes it possible for the general public to measure the maximum oxygen uptake amount, and moreover, the exercise amount necessary for the measurement can be accurately and easily measured.

(Embodiment) As shown in FIG. 1, a long plate-shaped base 2 is provided on a support base 1 in the front-rear direction, and a seat portion 3 is mounted on the base 2 so as to be movable in the front-rear direction. ing. The base 2 is pivotally attached to the support base 1 at the front end so that the tilt angle with respect to the horizontal plane can be adjusted, and the rear end is supported by the lifting device 4. Therefore, the tilt angle of the base 2 in the front-back direction with respect to the horizontal plane is adjusted as the lifting device 4 moves up and down. The support 1 is connected to the load device 5 at the front end of the base 2, and the oar 6 projects forward and backward from the rear surface of the load device 5. The load device 5 is a device that applies a braking force to the all 6 when the all 6 is pulled out from the load device 5, and the braking force is adjustable. Details of each unit will be described below.

As shown in FIG. 2, the support base 1 is placed on the floor, is connected to the housing 50 of the load device 5 at the front end, and has the lifting device 4 at the rear end. A part of the front end of the support base 1 projects upward, and the base 2 is supported in a form in which a notch 21 provided at the front end of the base 2 is engaged with an engaging portion 11 formed at the upper end thereof. It is attached so as to be tiltable with respect to the table 1. A pair of rail grooves 22 that run in the front-rear direction are formed on both upper and lower surfaces of the base 2, and a seat portion 3 is disposed on the base 2 so as to be able to travel in the front-rear direction.
As shown in FIG. 3, the seat portion 3 is composed of a seat 31 on which a measurer sits and a runner 32 provided on the lower surface of the seat 31, and the runner 32 engages with each rail groove 22 of the base 2. It is equipped with a total of eight rollers 33 that travel in the same manner. That is, the seats 3 move in a straight line in the front-rear direction as the rollers 33 travel while engaging with the rail grooves 22. A pair of front and rear seat stoppers 23, 24 are provided at fixed positions on the side surface of the base 2 so as to be spaced apart in the front-rear direction and restrict the traveling of the runner 32.
The seat part 3 is movable only within the range of 24. A limit switch 25 having an actuator is arranged at a fixed position on the lower surface of the base 2 near the rear sheet stopper 23 so that the lower end of the roller 33 can come into contact with the runner 32. A contact output is obtained from the limit switch 25 at the position where the contact of the seat portion 3 is stopped and the movement of the seat portion 3 is stopped. The seat 31 is provided with a seat belt 34 that prevents the seating position of the measurer from shifting. Foot rests 7 are arranged on both sides of the front end of the base 2. As shown in FIG. 4, the footrest base 7 is fixed to the base 2 by a mounting screw 71 having threaded portions 72 at both ends and a pair of cap nuts 73. In order to adjust the mounting position of the stand 7 in the front-back direction,
A plurality of mounting holes 26 penetrating left and right are formed. That is, a through hole 74 penetrating left and right is formed in the foot rest 7, and the through hole 74 and the mounting hole 26 of the base 2 are arranged in a state where the foot rest 7 is arranged on both left and right side surfaces of the base 2. Insert the mounting screw 71, and insert the cap nuts 73 into the screw parts 72 provided on both ends of the mounting screw 71.
The footrest 7 can be fixed to any position in the front-rear direction of the base 2 by screwing. The footrest 7 is provided with a band 75 that prevents the toes of the measurer from being displaced from the footrest 7.

The rear end of the base 2 is supported on the lifting device 4 as described above. As shown in FIG. 5, the lifting device 4 connects a base 41 arranged at a fixed position on the floor, a pair of arms 42 whose lower ends are axially attached to the base 41, and upper ends of both arms 42. Lifting base 43 attached to the bottom of the base 2 and both arms 42
An adjusting screw 44 having both ends screwed into the upper and lower intermediate portions thereof is provided. Each arm 42 is a pair of upper and lower arm pieces 42, respectively.
a, 42b are connected via an intermediate connecting member 45, each arm element 42a, 42b and the intermediate connecting member 45 are axially attached, and the upper end of each upper arm element 42a is a lift table. It is pivotally attached to 43. The adjusting screw 44 has screw portions 44a and 44b at both ends which are reverse threads to each other, and is an intermediate connecting member of each arm 42.
The intermediate connecting member 45 is penetrated by being screwed into each of them.
With the above configuration, the space between the intermediate connecting members 45 expands and contracts as the adjusting screw 44 rotates, and the length of the diagonal line of the four-bar mechanism is adjusted.
The height position of 43 is adjusted. A worm wheel 46 is provided at one end of the adjusting screw 45 so as to rotate together, and a worm 47 that meshes with the worm wheel 46 is provided.
The elevating table 43 is configured to move up and down in accordance with the rotation of the motor 48 whose output shaft is. The motor 48 and the worm 47 are attached to the mounting plate 49. As shown in FIG. 5 (b), the upper surface of the lift table 43 has a bifurcated engagement portion 43 a.
Is formed, the engaging projection piece 35 provided on the lower surface of the rear end portion of the base 2 is engaged, and the engaging portion 43a and the engaging projection piece 3 are formed.
The base 2 is pivotally mounted by an engagement pin 36 that is inserted through the shaft 5, and the inclination angle of the base 2 with respect to the lift table 43 in the front-rear direction is adjusted. The lifting device 4 has a housing 40, and most of it is disposed inside the housing 40, but the lifting platform 43 is exposed from the housing 40 and is connected to the rear end of the base 2 as described above. . On the upper surface of the housing 40, there is provided an operation display section 80 for adjusting the tilt angle of the base 2 while seated on the seat section 3 and for displaying the measured maximum oxygen intake. A pulse sensor 81 for detecting the pulse of the measurer is provided near the operation display unit 80. In the housing 40, a calculation control circuit unit, which will be described later, is housed in order to calculate the data from the operation display unit 80 and the pulse sensor 81 to obtain the maximum oxygen uptake amount.

By the way, the front end of the support base 1 is the housing of the load device 5.
It is connected to the lower part of the rear end of 50. Housing 50 for load device 5
As shown in FIG. 6, a plurality of fixing holes 51 arranged in the front-rear direction are formed in the lower rear end portion, and through holes 12 are formed in the support base 1 corresponding to the fixing holes 51. . The fixing hole 51 is a screw hole, and the fixing screw 13 is screwed into the fixing hole 51 through the through hole 12 in a state where the through hole 12 is matched with the desired fixing hole 51, thereby supporting the housing 50 against the support base. 1 can be fixed at any position in the front-rear direction. The load device 5 exerts a braking force on the oar 6 when pulling the oar 6, and as shown in FIG.
Inside the rack 6, a rack 61 is formed. A tension spring such as a coil spring is provided at the front end of the oar 6.
One end of 62 is connected and the other end of tension spring 62 is
Are connected in place. On the other hand, a grip 63 is formed at the rear end of the oar 6 so as to be orthogonal to the longitudinal direction of the oar 6. The rack 61 meshes with the pinion 52, and a pressing roller 55 is arranged on the lower surface of the oar 6 so as to face the pinion 52. The pressing roller 55 has a support arm 56 whose one end is axially attached to a support column 50a fixed in a fixed position in the housing 50.
The support arm 56 is rotatably provided at the other end of the support arm 56 and is biased by a pressing spring 57 to elastically contact the pressing roller 55 with the lower surface of the oar 6. In this way, the oar 6 is held between the pinion 52 and the pressing roller 55 so that the pinion 52 does not come off the rack 61. As shown in FIG. 8, the pinion 52 has an internal tooth that serves as a ratchet 53a, and is composed of a ratchet 53a and a claw 53b.
A flywheel 54 is connected to the pinion 52 via 53. The claw 53b that constitutes the ratchet mechanism 53 is the rotating shaft 54a of the flywheel 54.
The flywheel 54 rotates with the movement of the oar 6 when the oar 6 is pulled, and when the oar 6 is pushed, the engagement between the claw 53b and the ratchet 53a is released and the flywheel 54 rotates. Without doing so, the pinion 52 is designed to spin idle. At this time, the spring force of the tension spring 62 causes the oar 6 to return to its original position. That is, the load accompanying the rotation of the flywheel 54 acts only when the oar 6 is pulled. A braking device 58 that applies a braking force to the rotation of the flywheel 54 is provided on the upper portion of the housing 50. The braking device 58 has an operating shaft 58a provided with a threaded portion on its peripheral surface that is screwed into the housing 50 and is screwed into the housing 50.
And a brake shoe 58b provided at the lower end of the operation shaft 58a and capable of contacting the peripheral surface of the flywheel 54 in the housing 50, and a knob 58c provided at the upper end of the operation shaft 58a and protruding outward from the upper surface of the housing 50. Composed. Therefore, by rotating the knob 58c and adjusting the contact pressure of the brake shoe 58b against the flywheel 54, the flywheel 54c
The load can be adjusted by. As shown in FIG. 7, an all stopper 64 is projectingly provided on the side surface of the front end portion of the oar 6, and the all stopper 64 is formed on the side surface of the housing 50 before and after it is formed on the side surface of the housing 50, as shown in FIG. It is movable in the long guide groove 59. That is, the movement of the oar 6 in the front-rear direction is restricted within the length of the guide groove 59.

With the above configuration, the measurer can sit on the seat 31 with his foot resting on the footrest 7 and grasp the grip 63 of the oar 6,
You can do rowing exercises. That is,
When the measurer pulls the oar 6 with his legs extended, the reaction force causes the seat 31 to move forward and bend his knees.
Then, while extending the legs, the seat 31 is moved backward, and at the same time, the oar 6 is returned to the front. Here, the load applied to the arm 6 can be adjusted because the load of the oar 6 can be adjusted by the load device 5, and the tilt angle of the base 2 can be adjusted by the lifting device 4 so that the load applied to the leg can be adjusted. It is possible. Also, as described above, the footrest 7
Of the load on the base 2 and the housing of the load device 5
The position of the support base 1 with respect to 50 is adjustable and these adjustments are performed as follows. That is, the footrest base 7 moves the seat 31 to a position where the seat 31 is locked by the rear seat stopper 23 with the measurer's legs extended, and is fixed to the base 2 at this position. Therefore, when the seat 31 moves, the seat 31 comes into contact with both seat stoppers 23 and 24 at the front and rear ends of the moving range.
The stroke of is a constant value regardless of the individual. Further, the support base 1 is fixed to the housing 50 at a position where the oar stopper 64 is locked at the rear end edge of the guide groove 59 in a state where the oar 6 is maximally pulled in the boating motion. Accordingly, the oar stoppers 64 contact the front and rear edges of the guide groove 59 at the front and rear ends of the moving range of the oar 6, so that the stroke of the oar 6 becomes a constant value without individual differences. As described above, since the strokes of the seat 31 and the oar 6 are adjusted by adjusting the positions of the footrest 7 and the support 1 at the start of measurement, the amount of movement (work) = load force × movement distance It became unnecessary to measure the movement distance when measuring, and it became easy to estimate the momentum. That is, the boating motion is performed at a predetermined pitch in accordance with the pitch sound and the like, and since the number of pitch sounds corresponds to the number of times of motion, the moving distance can be obtained by the product of the stroke and the number of times of motion. The amount of leg exercise is Wg × L ₁ × sin θ × N, where Wg is the weight, L _{1 is} the moving distance of the seat 31, θ is the angle of inclination of the base 2, and N is the number of pitch sound occurrences (number of exercises). When the momentum of the arm is represented by n, the number of rotations of the pinion 52 with respect to the stroke of the all 6 is n, the circumferential length of the flywheel 54 is S, and the frictional force between the braking device 58 and the flywheel 54 is F. , F × S × n ×
It is represented by N. Further, since the limit switch 25 is provided at the rear end position of the moving range of the seat 31, the seat 31
The limit switch 25
This can be easily known by detecting the presence or absence of the contact output. That is, the notification lamp 8 provided on the rear surface of the housing 50 of the load device 5 is made to blink in response to opening and closing of the limit switch 25, so that the pitcher and the notification lamp 8 blink. By exercising, the boating movement is surely performed according to the pitch sound.

The limit switch 25 is used for detecting the movement of the seat 31, but may be provided so as to detect the movement of the all 6. In addition, in the ergometer of the type that rides a bicycle,
If the number of rotations of the pedal is detected by an encoder and the like, and if the number of rotations is a constant value, it is notified to the measurer by a notification lamp or the like, so that the measurement can be performed accurately as in the present embodiment. is there.

By the way, the maximum oxygen intake of the measurer is measured as follows. That is, the pulse sensor 81 pulled out from the operation display unit 80 is attached to the earlobe or the like to detect the pulse rate, and at least the weight, age, and sex data of the person to be measured is input from the personal data input unit 82. In addition to the personal data input section 82 as an input section, the operation display section 80 is provided with various operation functions for adjusting the inclination angle of the base 2 and adjusting the exercise pitch. Further, as a display function, there are provided a pulse display section 83, a load intensity display section 84, and a maximum oxygen intake display section 85 for displaying the values of pulse, load intensity, and maximum oxygen intake, respectively, and also generates a pitch sound. The pitch sound generating unit 86 is also provided on the operation display unit 80. The pulse is detected by the pulse sensor 81 and the value measured by the pulse measuring unit 87 is displayed on the pulse display unit 83, and at the same time, this value is stored in the storage unit 88, and the load intensity-pulse rate predicting unit.
Entered in 89. On the other hand, the load intensity calculation unit 91 based on the inclination angle of the base 2 measured by the base inclination measurement unit 90.
The load intensity is calculated in, and the load intensity is stored in the storage unit 88 and simultaneously displayed in the load intensity display unit 84. The load intensity is also input to the load intensity-pulse rate predicting unit 89, and a regression analysis of the pulse rate and the load intensity is performed to obtain a regression equation for obtaining the work rate for each individual pulse. The output of the load intensity-pulse estimation unit 89 is input to the base inclination calculation unit 92, the inclination angle of the base 2 is determined so as to obtain an appropriate load intensity, and this output and the output of the base inclination measurement unit 90 In the motor rotation speed calculation unit 93, the rotation speed of the motor 48 necessary for setting the inclination angle of the base 2 to a desired value is set. The motor 48 is controlled via the motor drive circuit 94 by this rotation speed. By the way, as described above, the storage unit 88 stores the weight, age, and sex data input from the personal data input unit 82, the pulse rate, and the load intensity, and based on these, the maximum oxygen uptake amount. The maximum oxygen intake amount is calculated in the calculation unit 95, and the value is displayed on the maximum oxygen intake amount display unit.

The maximum oxygen intake calculation unit 95 performs the following calculation. That is, it is experimentally known that exercise intensity (work rate) and oxygen uptake are in a proportional relationship as shown in FIG. 10, and the oxygen uptake at the limit point of cardiopulmonary function is the maximum oxygen uptake. Called the amount o ₂ max. Here, the oxygen uptake is the amount of oxygen ingested per unit time and unit weight, and the work rate is the work amount per unit time. Further, in FIG. 10, x indicates the limit point of the muscle strength of the arm in the conventional device. That is, in general, since the arm strength is weak with respect to the leg strength, the conventional device shows that the muscle strength of the arm reaches the limit point before reaching the limit point of the cardiopulmonary function. This point is as described in the background art section. On the other hand, in the present invention, as shown by a circle in FIG. 10, by measuring the oxygen uptake at each load intensity while gradually increasing the load, the conventional drawback is avoided by linearly predicting the maximum oxygen uptake. I am doing it. That is, FIG. 11 (a)
As described above, it is known that the work rate and the oxygen uptake amount have a correlation, and the relationship between the work rate and the oxygen uptake amount o ₂ is given as a regression equation as follows.

o ₂ = a × + b. Here, a and b are constants determined by regression analysis, and it is known that there is no individual difference. on the other hand,
As shown in FIG. 11 (b), it is known that the power rate is proportional to the pulse rate HR, and the power rate is expressed by the following equation with respect to the pulse rate HR.

= C * HR + d ... Here, c and d are constants. However, in the device of the present invention, the load intensity and the pulse are measured at a plurality of points while gradually increasing the load, and if the relationship is calculated in the load intensity-pulse predicting unit 89, the constants c and d can be determined. Of. Here, it goes without saying that the more the number of measurement points, the higher the reliability of the formula. Since the work rate is thus expressed as a function of pulse rate, the oxygen uptake eventually becomes a function of pulse rate as shown in FIG. 11 (c). That is, the oxygen intake amount o ₂ and the pulse rate HR are o ₂ = a ′ × HR + b ′. Here, since a and b are given in advance and c and d are determined by measurement, a 'and b'are uniquely determined as a' = a * c b '= ad * b. . On the other hand, the maximum value HRmax of the pulse rate is correlated with the age and the sex, and the maximum value of the pulse rate can be determined based on the age and the sex input from the personal data input unit 82. Therefore, if the maximum pulse rate HRmax is calculated from the age and sex, and this is substituted into the formula, the maximum oxygen uptake can be calculated.

[Advantages of the Invention] As described above, the present invention is such that the tilt angle with respect to the horizontal plane can be freely set, the seat portion disposed on the base so as to be movable in the tilt direction, and the seat portion is seated. A footrest attached to the base so that both feet of the measurer can be placed on it, and an oar equipped with a grip that can be moved forward and backward from the housing connected to one end of the base in the tilt direction and that the measurer can hold with both hands. Pitch signal generating means for intermittently outputting a pitch signal by light or light, a personal data input section for inputting the weight, age, and sex of the measurer, and when the measurer makes a rowing motion in response to the notification signal. The exercise amount measuring means for calculating the exercise amount from the number of repetitions, the pulse detecting means for detecting the pulse of the measurer, the oxygen for calculating the maximum oxygen uptake amount from the measurer's weight, age, sex, exercise amount and pulse rate Intake calculation means, Equipped with seat movement range regulation means for regulating the movement range of the seat part and oar advancement / retreat range regulation means for regulating the range of advance / retreat of the oar from the housing, and the position of the base can be adjusted with respect to the housing in the advance / retreat direction of the oar. The footrest is attached to the base so that the position of the footrest can be adjusted in the moving direction of the seat. By adjusting the position, it is possible to adjust the movement range of the seat part to a pre-regulated range, so that it is not necessary to measure the movement distance of the seat part, and the all-advance / retreat range restriction means regulates the all-advance range. As a result, there is an advantage that the momentum can be measured easily and accurately. Further, since it is not necessary to measure the moving distance in measuring the amount of exercise, the measuring device is simplified and the cost is reduced.

[Brief description of drawings]

FIG. 1 is an external perspective view showing an embodiment of the present invention, FIG. 2 is a partially cutaway perspective view of the same as above, and FIGS. , And a side view of the main part, and FIG. 4 is an exploded perspective view of the main part showing the periphery of the footrest.
5 (a) and 5 (b) are perspective views of a main part and a cross-sectional view of the main part showing the periphery of the lifting device, respectively, and FIG. 6 (a).
FIG. 7B is a perspective view of a main part showing a connecting portion between a support and a load device in the same as above, and FIGS. 7A and 7B are perspective views of a main part showing the load device in the same and a braking device. Sectional views, FIGS. 8 (a), (b), and (c) are side views showing the ratchet mechanism of the above, a detailed sectional view, and a sectional view of an essential part, and FIG. 9 is a block diagram of a circuit section used therein.
FIG. 10 and FIG. 11 are operation explanatory views for explaining the measurement principle of the same. 2 is base, 3 is seat, 6 is oar, 7 is footrest, 8
Is a notification lamp, 23 and 24 are seat stoppers, 25 is a limit switch, 59 is a guide groove, 63 is a grip, 64 is an all stopper, 81 is a pulse sensor, 82 is a personal data input section, 86 is a pitch sound generation section, and 95 is It is a maximum oxygen uptake calculation unit.

Claims (2)

[Claims] 1. A base on which a tilt angle with respect to a horizontal plane can be freely set, a seat portion provided on the base so as to be movable in the tilt direction, and both feet of a measurer seated on the seat portion are placed. As shown in the figure, the foot rest is attached to the base, the oar is equipped with a grip that can be moved forwards and backwards from the housing that is connected to one end of the base in the tilt direction, and the operator can hold it with both hands. Pitch signal generating means for automatically outputting, the personal data input section for inputting the weight, age, and sex of the measurer, and the amount of exercise from the number of repetitions when the measurer makes a rowing motion in response to the notification signal. Exercise amount measuring means for calculating, pulse detecting means for detecting the pulse of the measurer, oxygen intake calculating means for calculating the maximum oxygen intake from the weight, age, sex, exercise amount and pulse rate of the measurer, and a seat The moving range of the section The seat moving range restricting means and the all-advancing / retreating range restricting means for restricting an advancing / retreating range of the oar from the housing are provided, and the base is connected to the housing so that the position of the oar can be adjusted in the advancing / retreating direction of the oar. The rowing ergometer, wherein the footrest is attached to the base so that the position of the footrest can be adjusted in the moving direction of the seat. 2. A notifying means for transmitting a notifying signal when the seat reaches a predetermined position, the notifying means being provided at a predetermined position within a moving range of the seat. The rowing ergometer described in.