JP2967580B2 - Arrangement structure of floor reaction force measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrangement structure of a floor reaction force measuring device used for gait analysis and balance function training of a subject such as a patient in orthopedic surgery and rehabilitation in the medical field.

[0002]

2. Description of the Related Art Conventionally, floor rehabilitation devices such as stroke and neurological diseases, or orthopedic diseases and sports medicine have been used as devices used to analyze the movements of patients and subjects, determine the effects of training, and determine treatment guidance. Force measurement devices are known. The floor reaction force measuring device is a device that detects a change in a load acting on both feet of the subject, a movement locus of the center of the load, and a fluctuation (sway) of the position of the center of gravity of the subject. FIG. 3 is a plan view showing a structural example of a conventional floor reaction force measuring device.

[0003] A floor reaction force measuring apparatus 100 shown in FIG. 3 includes a rectangular base (base plate) 101 and this base 1.
The floor reaction force measuring means (three-component force load cell) 102 is attached to the four corners of No. 01 in the plane direction and the vertical direction, and the platform 103 is mounted on the floor reaction force measuring means 102. .

Each of the floor reaction force measuring means 102 includes, among the loads acting on the step 103, two axes orthogonal to each other along the plane of the step 103 (hereinafter, these two axes are referred to as an X axis and a Y axis). An X-axis direction component force detector 102a and a Y-axis direction component force detector 102b for detecting a component force in the direction, and a component force in an axis perpendicular to the surface of the step 103 (hereinafter, referred to as a Z-axis). And a Z-axis direction component force detector 102c.

The floor reaction force measuring device 100
Each component force detector 102a, 10 of each floor reaction force measuring means 102
Based on the detection results from 2b and 102c and the information on the moment about each axis, weight distribution during driving, driving force and control force, transition of weight (in a standing state, the center of gravity is swayed), torsional force, and stride Information such as the walking speed, walking stability, and balance in a standing posture can be obtained.

Further, as schematically shown in FIGS. 4 (a) and 4 (b), a plurality of floor reaction force measuring devices 100 are arranged side by side, and the subject walks on the ground. Measurement was also performed.

[0007]

However, the conventional floor reaction force measuring device 100 is supported at four points by four supporting legs provided below the base 101. When it was attempted to ground the 100 at an uneven measurement place, it was very difficult to ground in a stable state. In addition, if the user intentionally tries to touch the ground in a place with irregularities, the setting values of various sensors and the like may have to be changed, and the operation is very complicated.

A conventional floor reaction force measuring device 100 is shown in FIG.
(A) When a subject walks on a plurality of lines in a row as shown in (a), the floor reaction force measurement device must be set so that both the left and right feet land in a straight line in the traveling direction and do not walk with a certain fixed step length. Since it is not possible to walk well on 100, the measurement is performed in a state different from a normal walking state, and there is a problem that accurate measurement cannot be performed. In the case where two or more rows are arranged as shown in FIG. 4B, the subject has to walk while stepping on the left and right floor reaction force measuring devices 100 with the left and right feet, and is not conscious of the stepping. There was a problem that accurate measurement could not be performed due to walking different from normal walking.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and is easy to ground without being affected by the shape of the grounding surface at the grounding place, and accurately performs measurement in a normal walking state. It is an object of the present invention to provide a floor reaction force measuring device that can perform the measurement.

[0010]

In order to solve the above-mentioned problems, the invention according to claim 1 is an arrangement structure of a floor reaction force measuring device.
The floor reaction force to measure the floor reaction force in the plane direction and the vertical direction
Force measuring means and a base supporting the floor reaction force measuring means
And a step installed on the floor reaction force measuring means.
It is configured so that the whole is substantially triangular in plan view,
Supports three points as a whole with support legs provided below the three corners
Multiple floor reaction force measurement devices
The feature is that they are all arranged.

According to the first aspect of the present invention, the whole is flat.
It is configured to be approximately triangular when viewed, and below the three corners
Floor supported by three points supported by the provided support legs
A plurality of reaction force measuring devices are arranged at intervals that allow for stride length.
Is placed. Therefore, for example, the floor
The subject walks alternately on the platform on the force measurement
If you measure the reaction force, you can usually measure the walking state.
If you walk in a conventional rectangular shape,
You will be able to walk closer to your condition
Reliable measurement is possible.

Here, as the floor reaction force measuring means, for example, a well-known load cell can be used. Any method may be used. In addition, the substantially triangular shape means not only a strict triangle but also, for example, a shape in which a corner of the triangle is chamfered, or
This means that each side of the triangle includes not only a straight line but also a wavy line, and any shape may be used as long as it looks like a triangle.

According to a second aspect of the present invention, there is provided the floor according to the first aspect.
In the arrangement structure of the reaction force measuring device, the floor reaction force measuring device
As a whole, it has a substantially right triangle shape in plan view.
It is characterized by.

According to the second aspect of the invention, the floor reaction force is measured.
Since the means is in the shape of a substantially right triangle in plan view,
When two are grounded side by side in a certain direction,
Can be arranged linearly as a square or rectangle.
Thus, efficient measurement can be performed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a floor reaction force measuring device according to the present invention will be described below in detail with reference to the drawings. FIG.
1A is a plan view of a floor reaction force measuring device 1 according to the present invention, and FIG.

A floor reaction force measuring device 1 shown in FIG. 1 is attached to a base 2 at three corners a, b, and c of the base 2 and detects a load in a direction perpendicular to the base 2 (Z-axis direction).
Z-axis reaction force measuring means (floor reaction force measuring means) 3, 3, 3,
Two X-axis reaction force measuring units (floor) each mounted near the center of the base 2 and detecting loads in two axial directions (X-axis direction and Y-axis direction) orthogonal to the base 2 in a horizontal direction. Reaction force measuring means) 4,4 and Y-axis reaction force measuring means (floor reaction force measuring means) 5,5, step 6 supported by these X-, Y-, and Z-axis reaction force measuring means 3, 4, 5 , Etc.,
The whole is substantially triangular in plan view.

The base 2 is formed, for example, in a planar shape and in a substantially triangular shape in a plan view, and support legs 31 for supporting the floor reaction force measuring device 1 at three points are provided below the three corners. The support legs 31 support the entire body at three points. Therefore, even where there are irregularities,
The floor reaction force measuring device can be grounded in a stable state, and the work can be performed easily without changing the set values of various measuring devices.

The step 6 is, for example, formed in a substantially triangular shape in plan view corresponding to the base 2 in a planar shape. And
The load when the subject rides thereon is transmitted to the X-axis, Y-axis, and Z-axis reaction force measuring means 3, 4, and 5.

The Z-axis reaction force measuring means 3, 3, 3
It is composed of a well-known load cell and the like, and has three corners a,
b and c are provided in a well-balanced manner.

The X-axis reaction force measuring means 4 and 4 and the Y-axis reaction force measuring means 5 and 5 are composed of, for example, a well-known load cell. The two X-axis reaction force measuring means 4 and 4 or the Y-axis reaction force measuring means 5 and 5 respectively measure the load in the X-axis direction and the Y-axis direction of the subject on the platform 6 by adding the measurement results. doing.

Next, a normal walking state measurement using the floor reaction force measuring device according to the present invention will be described. FIG. 2 is a plan view schematically showing an arrangement structure of the floor reaction force measuring device according to the present invention. When performing normal walking measurement using the floor reaction force measurement device 1, as shown in FIG. 2A, the measurement is performed in a state where a plurality of the floor reaction force measurement devices 1 are arranged in a fixed direction and grounded. In this case, the two floor reaction force measuring devices 1 are combined into a quadrangle and linearly arranged in a certain direction, so that the user can walk straight or walk with both feet as shown in FIG. 4 (a) or (b). Since it is not necessary to perform walking in an open state, the degree of freedom of walking is increased, and measurement can be performed in a state closer to normal walking. In addition, as shown in FIG. 2B, when a plurality of right-angled triangular floor reaction force measuring devices 11 are arranged in a certain direction, the measurement can be performed in a more efficient space.

The floor reaction force measuring means may measure the X-axis, Y-axis, and Z-axis separately as in the above embodiment, or may be a three-component reaction force measuring means or a two-component force. A configuration in which a plurality of axes are measured simultaneously, such as a reaction force measuring unit, may be used.

[0023]

According to the first aspect of the present invention, the whole is flat.
It is configured to have a substantially triangular shape in plan view, and the lower side of the three corners
The whole was supported by three points support by the support legs provided in
A plurality of floor reaction force measuring devices are arranged at intervals that can take a stride.
Because it is arranged, for example, the floor reaction force arranged in this way
The subject walks alternately on the step platform of the measuring device
If you measure the force, you can usually measure the walking state
If you walk in a conventional rectangular shape,
You will be able to walk closer to your condition
Reliable measurement is possible.

According to the second aspect of the present invention, the floor reaction force is measured.
As the device has a substantially right-angled triangular shape in plan view,
When arranging them in a certain direction and grounding multiple
Can be arranged linearly as a square or rectangle
And efficient measurement becomes possible.

[Brief description of the drawings]

FIG. 1 is a plan view (a) of a floor reaction force measuring device according to the present invention,
And a side view (b).

FIG. 2 is a plan view schematically showing a case where floor reaction force measuring devices according to the present invention are arranged.

FIG. 3 is a plan view showing a structural example of a conventional floor reaction force measuring device.

FIG. 4 is a plan view schematically showing an arrangement structure of a conventional floor reaction force measuring device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floor reaction force measurement device 2 Base 3 Z-axis reaction force measurement means (floor reaction force measurement means) 4 X-axis reaction force measurement means (floor reaction force measurement means) 5 Y-axis reaction force measurement means (floor reaction force measurement means) 6 Step 31 Support leg

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A61B 5/11

Claims (2)

(57) [Claims] 1. A floor reaction force in a plane direction and a vertical direction is measured.
A floor reaction force measuring means, and a base supporting the floor reaction force measuring means.
And a step installed on the floor reaction force measuring means.
The whole is configured to be substantially triangular in plan view.
The support legs provided below the corners support the whole body at three points.
Multiple floor reaction force measuring devices arranged at intervals that allow for stride length
Arrangement of the floor reaction force measuring device
Build. 2. The floor reaction force measuring device according to claim 1, wherein the whole is flat.
Characterized in that it has a substantially right triangular shape when viewed.
Item 2. An arrangement structure of the floor reaction force measuring device according to Item 1.