JP2849938B2 - Floor reaction force meter and pulse detection method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor reaction force meter, and more particularly, to a floor suitable for detecting a load in a gravitational direction and an amount of load fluctuation on an inclined surface or a dynamic condition. It relates to a reaction meter and a method for detecting a pulse.

[Prior Art] A limited relatively small surface is artificially inclined, and a sports training device, a special environment simulation device and the like using the inclined surface are used. In particular, in recent years, interest in health has increased, and training has been performed from the viewpoint of sports medicine.Therefore, the need for the floor reaction force meter to detect the position of the center of gravity not only on the horizontal surface but also on the inclined surface is required. Have been. In addition, in order to grasp the state of the body in consideration of the safety of the trainee performing training or the like, pulse measurement has been performed using a pulse sensor such as an ear-mounted type, a chest-mounted type, or a device wrapped around an arm.

[Problems to be Solved by the Invention] In such a floor reaction force meter, conventionally, only detection on a horizontal surface in a stationary state has been performed.
There has been no structure capable of effectively holding the upper plate and the lower plate against the force of sliding movement between the upper plate and the lower plate, that is, the movement in the direction perpendicular to the detection direction of the detection means.

In such a conventional apparatus, in the detection on an inclined surface, or on the surface under dynamic conditions in which the horizontal movement, the inclination angle, and the inclination direction are continuously changed and moving, the upper plate receiving the load and the detecting means are provided. Contact point may slide or the direction of action of the load may not match the direction of action of the detecting means.
Since the load was not properly transmitted to the detection means and accurate and stable detection was not possible, the conventional floor reaction force meter could not be used on an inclined surface. In addition, a conventional pulse sensor for detecting a pulse, which is one measure for grasping a physical condition, restricts exercise by means of a pulse sensor code or the like except for an expensive telemeter type.

Therefore, the present invention is intended to perform a wide range of detection by obtaining a device capable of detecting not only on a horizontal plane but also on an inclined surface or dynamic conditions, and to detect a pulse without restricting the movement of the trainee. It is assumed that.

[Means for Solving the Problems] To solve the above problems, the present invention is as follows.

A lower plate, an upper plate disposed above the lower plate, detection means disposed on one of the opposing plate surfaces between the upper plate and the lower plate, the lower plate and the upper A bearing member disposed on one of the opposing plate surfaces between the plates, and engaging with the bearing member disposed on another opposing plate surface opposite to the opposing plate surface on which the bearing member is disposed. And a shaft to be used.

[Example] The present invention will be described in more detail below based on the illustrated example.

1 and 2 are external perspective views showing an embodiment of the present invention. Two sets of a shaft and a bearing member are arranged at a predetermined interval on a vertical line passing through a center point of a lower plate. Are provided. 3 and 4 are sectional views showing the apparatus of the present invention, and FIG. 4 is an inclined view. FIG. 5 shows another embodiment of the present invention, which shows a state where the apparatus is tilted at a position provided on a gantry having one rotating shaft. FIG. 6 is another embodiment showing an inclined state of the present apparatus, which is provided on a gantry that includes two orthogonal rotation axes in the drawing and is capable of turning the surface back and forth and right and left. In the gantry shown in FIG. 6, a surface 12 can rotate around the axis 9, and a shaft 10 orthogonal to the axis 9 is provided on the same surface, and a surface 13 that rotates about the axis 10 is provided on the surface 12. Has been established. In addition, by simultaneously moving the surfaces 12 and 13 that rotate about the shafts 9 and 10, it is possible to incline not only in the front-back and left-right directions but also in the inclination direction. FIG. 7 shows an embodiment of the present invention in which arithmetic processing means are combined.

In the figure, reference numeral 1 denotes a lower plate.
Disposed above is the upper plate 2. Reference numeral 6 denotes a detecting means which is provided at several places on the surface of the lower plate 1 and is connected to a measuring instrument.

The detection means 6 is a conventional detection means, such as a beam-type load cell, which has a low natural frequency and easily detects noise due to vibration from other members, and is not suitable for measurement under dynamic conditions. A compression type high rigidity converter having a high frequency is used. Numeral 21 is an arithmetic processing means connected to the detecting means 6.

The detecting means 6 is provided in at least three places. The three
When the floor reaction force meter is a triangle, the three points are disposed near three vertices and are preferably disposed on vertices forming an isosceles triangle. In the case of a quadrangular floor reaction force meter, if the position of the center of gravity protrudes from the inside of the triangle in three places at the contact point between the detecting means 6 and the upper plate 2, a negative force is obtained if the force compressing the detecting means is positive. That is, a place where a force for lifting the upper surface plate 2 acts appears. Therefore, since the detection is impossible with the compression type detection means, the detection means 6 is set at the center point near the four corners on the lower plate 1 so that the detection area can be widest in the rectangular floor reaction force type of the embodiment. Four reference points are symmetrically arranged. The detection means 6 is appropriately arranged according to the shape of the floor reaction force meter so that the detection area can be widened even in other polygons, circles, and ellipses.

Reference numeral 4 denotes a shaft disposed on the surface of the lower plate 1. Reference numeral 3 denotes a bearing member that engages with the shaft 4. The shaft 4 and the bearing member 3 are positioned so that the upper plate 2 is positioned parallel to the upper surface of the lower plate 1 so that the load acting on the upper plate 2 acts vertically on each of the detecting means 6, and is maintained without sliding. It is arranged as follows.

Further, while one set of the shaft 4 and the bearing member 3 is a single support point, when a force acts obliquely or laterally in a direction different from the direction toward the support point, a rotational force is generated. In order to efficiently receive the rotational force, at least two sets of the shaft 4 and the bearing member 3 are arranged, and the upper plate 2 can be stably held when the set has a certain distance. Preferably shaft 4, bearing member 3
Are arranged on a line passing through the center point on the surface of the lower plate 1 so that the arrangement of the sets is not offset in one direction.

The shaft 4 may be provided on the lower surface of the upper plate 2 and the bearing member 3 may be provided on the upper surface of the lower plate 1.

The upper plate 2 is provided with the bearing member 3 on the lower surface, and a through hole 16 is provided at a position above the detecting means 6. The adjusting member 5 is provided in the through hole 16, and the adjusting member 5 is provided through the adjusting member 5. It is supported by the detection means 6.

Further, the detecting means 6 is adjusted by moving the adjusting member 5 up and down, because the slight inclination of the upper plate 2 and the degree of application of a load vary depending on the difference in height of each detecting means 6.

The adjusting member 5 is loosened by vibration or rattle occurs, so that a contact member 14 is provided on a side portion, and a tightening member 15 provided in a through hole 17 communicating from the side surface of the upper plate 2 to the side of the adjusting member 5. As a result, the contact member 14 is adjusted by the adjusting member 5
The adjustment member is pressed and fixed to the side of the adjustment member, so that the adjusting member is not loosened or rattled, so that the detecting means can always detect accurately.

Conventionally, when a load is applied vertically to the upper surface of the upper plate on a horizontal surface, the load comes into contact with the upper plate, and the load is detected by detection means provided at several places. However, as shown in FIG. 4, when the load W is applied on the inclined surface having the inclination angle θ, a force of a component force W × sin θ is applied in a direction parallel to the upper surface of the upper plate 2. Each contact point between the upper plate 2 and the detecting means 6 is displaced, the load cannot be transmitted to the detecting means 6 properly, and stable detection cannot be performed, and the conventional floor reaction force meter cannot detect the load on the inclined surface. Was. Further, even under dynamic conditions such as horizontal movement on a horizontal plane and reciprocating motion, each contact point slides, so that no detection was possible.

The apparatus according to the present application includes a shaft 4 vertically projecting from the upper surface of the lower plate 1 and a bearing member 3 embedded at a position on the lower surface of the upper plate 2 to be engaged with the shaft 4. The plate 1 can be moved up and down smoothly in a reciprocal manner. That is, even if a force of component force W × sin θ is applied to the upper plate 2, a set of the bearing member 3 and the shaft 4 is arranged so that the upper plate 2 does not move in a direction parallel to the plate surface. In contrast, only the parallel component W × sin θ of the load is absorbed, and the vertical component W × cos θ passes. More effectively, the bearing member 3 is selected from those having an extremely small friction coefficient, such as a rolling linear motion bearing. As a result, the load is transmitted to the detecting means 6 efficiently. Therefore, the gantry 7 for creating an arbitrary inclined surface
Is effectively detected on Also, under dynamic conditions,
Even on a gantry that moves horizontally, reciprocates, or moves continuously from one slope to another, slippage between the upper plate 2 and the detection means 6 is eliminated, and detection is performed.

The detection value obtained by the detection means 6 is calculated by the arithmetic processing means
Calculation processing is performed by 21.

In the apparatus according to the present invention, when the trainee is placed on the upper plate in a stationary state, the pulsation is transmitted from the sole of the trainee to the upper plate, and the pulsation is detected by the detecting means 6. FIG. 8 shows the detection results. The vertical axis indicates the amount of fluctuation, and the horizontal axis indicates time. Graph A shows the result of detection by a pulse pickup (ear-mounted pulse sensor) that detects a pulse by attaching it to the earlobe, and graph B shows the amount of change in the detected value by differentiating the detection result of graph A. Graph C shows the detection result by the present apparatus, and the value detected by the present apparatus is the total value of the detectors arranged in the floor reaction force meter, and the amount of fluctuation corresponds to 50 gf for one dot in the vertical direction. The graph D is a graph obtained by performing an averaging process by three-point averaging as one calculation means in order to clarify the graph C.

In the figure, the direction of the fluctuation amount of the pulse pickup and the detection value of the present apparatus is opposite, but the timing of the peak of the detection result of the pulse pickup coincides with the peak of the detection result of the present apparatus. According to 21, a pulse and a heart rate can be measured by capturing a detection point at which the amount of variation overlaps the threshold from the setting of the threshold and performing arithmetic processing on the relationship with time.

The contact member 14 is made of a soft material such as resin, copper, and aluminum.

Although the floor reaction force meter of the present embodiment is rectangular, it may be implemented in a polygonal shape, a circular shape, or an elliptical shape.

[Effects of the Invention] As described above in detail, the present invention provides various inclined surfaces such as front-rear, left-right, and oblique directions on a gantry for producing inclined surfaces or other devices, or during horizontal movement or when the inclination angle and the inclination direction are continuous. Even under dynamic conditions that change and move, the floor reaction force type upper plate and the detector do not slip, and the load can be efficiently transmitted to the detector and used for accurate detection.

In addition, the trainee can easily detect the pulse simply by mounting on the apparatus without adding a pulse sensor to the body, and does not feel uncomfortable in appearance.

[Brief description of the drawings]

1 and 2 are perspective views showing the appearance of an embodiment of the present invention, FIGS. 3 and 4 are sectional views showing the apparatus of the present invention, and FIG. 5 is a gantry having one rotating shaft. FIG. 6 shows another embodiment showing an inclined state of a device disposed on a table, which includes two orthogonal rotation axes in a plane, and the plane is mounted on a gantry capable of turning back and forth and right and left. FIG. 7 is an external view showing an embodiment of the present invention, showing an inclined state of the present apparatus to be installed, and FIG. 8 is a detection result measured by a trainee mounted on a static state. is there. 1: Lower plate, 2: Upper plate 3: Bearing member, 4: Shaft 5: Adjusting member, 6: Detector 7: Stand, 8, 9, 10: Axis 11: Floor reaction force meter, 12, 13: Surface 14 : Contact member, 15: Fastening member 16: Through hole 1, 17: Through hole 21: Operation processing means, 22: Output display means

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-55077 (JP, A) JP-A-55-78934 (JP, A) JP-A-55-16677 (JP, A) 79472 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) A63B 69/00 A63B 24/00

Claims (10)

(57) [Claims] 1. A lower plate, an upper plate disposed above the lower plate, detection means disposed on one of opposing plate surfaces between the upper plate and the lower plate, A bearing member disposed on one of the opposing plate surfaces between the lower plate and the upper plate, and the bearing member disposed on another opposing plate surface facing the opposing plate surface on which the bearing member is disposed. A floor reaction force meter comprising a bearing member and a shaft engaged with the shaft member. 2. A lower plate, an upper plate disposed above the lower plate, detection means disposed on one of opposing plate surfaces between the upper plate and the lower plate, A bearing member disposed on one of the opposing plate surfaces between the lower plate and the upper plate, and the bearing member disposed on another opposing plate surface facing the opposing plate surface on which the bearing member is disposed. A pulse detection method, comprising: a shaft engaged with a bearing member; and an arithmetic processing means for arithmetically processing a detection value detected by the detection means, wherein a pulse is detected from a fluctuation amount of the detection value. 3. The combination of a shaft and a bearing member is at least two.
The floor reaction force meter according to claim 1, wherein the floor reaction force meter is provided as a set. 4. The floor reaction force meter according to claim 1, wherein the bearing member is a rolling type linear bearing. 5. The floor reaction force meter according to claim 1, wherein said detecting means comprises at least three detecting means. 6. The floor reaction force meter according to claim 1, wherein the detecting means is a compression type load transducer. 7. A through-hole is provided at a position where one of the detecting means of the upper plate and the lower plate is not provided and which engages with the detecting means, and an adjusting member is provided at the through-hole. The floor reaction force meter according to claim 1, wherein the floor reaction force is measured. 8. A through-hole 1 provided at a position where one of the detecting means of the upper plate and the lower plate is not provided and which engages with the detecting means, and a plate provided in the through-hole 1. An adjusting member, a through-hole 2 communicating from the side of the plate where the adjusting member is provided to the side of the adjusting member, and a contact member provided on the side of the adjusting member; The floor reaction force meter according to claim 1, further comprising a fastening member disposed in the through hole (2). 9. The floor reaction force meter according to claim 1, wherein the floor reaction force meter is provided on a gantry having at least one rotation axis parallel to the load surface of the upper plate. 10. The floor reaction force meter according to claim 1, wherein the two rotation axes are orthogonal to each other, and are disposed on a gantry having a surface which can be turned back and forth and left and right.