JPH0245906B2 - - Google Patents

Description

[Detailed description of the invention] Industrial applications The present invention relates to a variable load training device.

BACKGROUND ART Conventionally, various muscle strength training devices have been used to improve physical training. However, with this type of training device, there is a gap between the speed of the device, which is moved by the muscle strength of the trainee, and the load that this device applies to the trainee, as shown in straight lines a to c within the load curve in Fig. 1. As shown, there are various proportional relationships. That is, conventional exercise equipment for muscle training uses air pressure or hydraulic pressure as a power source for the equipment to provide exercises having the various proportional relationships described above.

Problems to be Solved by the Invention The present invention has been made in view of the above-mentioned problems. When the speed of the device operated by the muscle force exerted by the trainee is high, compared to when it is small, the speed is more than a linear proportional relationship. To provide a variable load training device that applies a large load to the above-mentioned trainee to provide more effective muscle training.

Means and Effects for Solving the Problems As a means to achieve the above object, a chair on which a trainee sits and an arm operated by the trainee with arm strength can be rotationally driven from the rotating shaft of the electromagnetic brake via a belt. At the same time, the rotary shafts of the chair and the operating arm are driven by an encoder via a belt, and at the same time, the voltage signal obtained by converting the output frequency signal of the encoder is set to have a predetermined proportional relationship, and the electric motor of the electromagnetic brake is controlled via a constant current circuit. The configuration is to add it to the child. When the trainee rotates the chair or the operating arm, the encoder detects a voltage signal corresponding to the rotation speed, and generates a torque or load on the motor according to the rotation speed. , which is characterized by improving the muscular strength of the trainee.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIGS. 2 and 3 are a side view showing the configuration of this embodiment and a perspective view showing the relationship between the mechanisms. In the figure, a DC motor 1 drives a pulley 6 attached to a shaft 5 of the pulley 4 via a pulley 2, a belt 3, and a pulley 4 attached to the shaft of the motor. A support rod 8 of an arm 7, which is held by both hands of the trainee, is fixed to the shaft 5. The pulley 6 drives a pulley 13 via a belt 9 and pulleys 11 and 12 rotatably attached to both ends of a shaft 10. The shaft 14 of the pulley 13 is fixed to the center of gravity of the seat 15 for the trainee. The shaft 10 is tightened to a fixed object 17 by bolts 18, 18' via a tightening member 16 fixed to the shaft. Further, the shaft 5 that drives the sitting chair 15 and has the support rod 8 of the arm 7 attached drives a pulley 21 via a pulley 19 and a belt 20 attached to the shaft, and the shaft of the pulley 21 is connected to a rotary shaft. - The encoder 22 is fixed.

On the other hand, the output of the rotary encoder 22 is applied via an amplifier 23 to a frequency-to-voltage converter 24, as shown in FIG. It is applied to a function generator (such as a broken line approximation linearizer or multiplier) 25 that outputs a small voltage value and outputs a larger voltage value for a large input voltage value. The output of the function generator 25 is applied via a constant current circuit 26 to the DC motor 1 on which an electromagnetic brake is applied.

Next, the operation will be explained.

When the trainee sits on the chair 15 and rotates the arm 7 in the direction of arrow 30, the pulley 6 moves in the direction of arrow 3.
Rotated in one direction. By the rotation of pulley 6,
The shaft 5 and pulley 21 are rotated, and the encoder 22 is rotated. As a result, a frequency proportional to the speed of rotation of the arm 7 is generated in the output of the encoder 22. This generated frequency signal is sent to the amplifier 23
A frequency-voltage converter 24 converts the frequency signal into a voltage signal and sends it out. This voltage signal is transmitted to the electromagnetic brake via a function generator 25 and a constant current circuit 26, as shown in FIG. is applied to the DC motor 1 to be acted upon. The DC motor 1 to which the electromagnetic brake is applied generates torque according to its current. DC motor 1 to which this generated electromagnetic brake is applied
The torque becomes a load on the person operating the arm 7. Note that since there is a linear proportional relationship between the electromagnetic brake drive current and the output torque, it is assumed that the electromagnetic brake drive current in FIG. 5 is the same as the output torque.

Furthermore, the generated torque depends on the characteristics of the function generator shown in FIG.
A smaller torque is generated, and a larger force is generated when the velocity of the muscle force is greater. That is, they correspond to curves b and c of the quadratic function shown in FIG. Furthermore, the shapes of the curves b and c can be freely adjusted by the function generator 25.

The apparatus shown in FIGS. 2 and 3 was designed to exercise muscle strength by horizontally rotating the chair 15, but
The device shown in Figure 6 is a device for training the abdominal and back muscles by bending and stretching the upper and lower body while sitting on a chair. In FIG. 7, reference numeral 41 denotes a rotation support member that rotates around a horizontally disposed support shaft 42 as a fulcrum. Reference numeral 43 denotes a rotating chair that rotates about a support shaft 44 arranged parallel to the support shaft 42 as a fulcrum. Pulleys 45 and 46 are fixed to both the support shafts 42 and 44, respectively. Pulleys 45 and 46 are electromagnetic brakes 4
The pulley 47a provided in 7 and the rotating chair 4
Belts 50a and 50b are hung between pulleys 48 and 49 disposed below 3. Although not shown in the drawings, a control signal is applied to the electromagnetic brake 47 in the same manner as in the previous embodiment. In the figure, 51
is a footrest for the ankles of both legs, and the rotation support member 4
1 and the rotating chair 43 are rotated as shown by the two-dot chain line in the figure.

Effects of the Invention As explained above, when a trainee performs muscular strength exercise, the present invention applies a smaller load when the speed of the device moved by the muscular strength is low, and a larger load when the speed is high. Since the structure is configured so that the load is applied to the trainee, the following effects are achieved. (1) Unlike the method in which the load is linearly proportional to the speed of the device, strength training is more efficient and the exercise effect can be enhanced. (2) Since an electromagnetic brake is used as the device control means, the response speed is fast. (3) By converting the reciprocating motion mechanism into rotational motion, the present invention can be applied to various training devices.

[Brief explanation of the drawing]

FIG. 1 is a load curve diagram showing the relationship between the speed of the device moved by the muscle strength of the trainee and the load applied by the device to the trainee; FIG. 2 is a side view showing the configuration of the embodiment of the present invention; FIG. 3 is a perspective view showing the relationship between the mechanisms of the embodiment of the present invention, FIG. 4 is a block diagram of the electrical means of the embodiment of the present invention, and FIG.
The figure is a characteristic curve diagram of a function generator, and FIG. 6 is a schematic diagram of a training device for bending and stretching the upper and lower body while sitting on a chair. 1...Motor controlled by electromagnetic brake, 7...
...Arm, 15...Chair, 22...Rotary
Encoder, 23... Amplifier, 25... Broken line approximation linearizer or multiplier, 26... Constant current circuit.

Claims (1)

[Claims] 1. A seating chair and arm for operating arm strength driven by an electromagnetic brake; an encoder that is engaged with a support rod of the arm and a drive shaft of the chair and generates a frequency signal according to the rotational speed of the shaft; means for converting the frequency signal of the encoder into a voltage signal; a function generator to which the voltage signal of the converting means is input and outputs a quadratic function output signal with respect to the input signal; A variable load training device comprising a constant current circuit into which an output signal is input and which drives the electromagnetic brake in accordance with the signal.