JPH078589A - Driving motion-practicing machine - Google Patents

Abstract

PURPOSE:To easily and precisely detect the position of feet of a testee during the driving motion of the testee by detecting the foot form of the testee and the position of the foot form on the basis of the measurement result of a load measuring means during driving motion, and displaying the two-dimensional orbits of the foot form and the load center on a display means in the state where they are conformed to the positional relation on a swing base. CONSTITUTION:A swing base 1 is formed of load detecting bases 10, 11 corresponding to left and right feet, the load detecting base 10 is supported in four corners by load cells 12, 13, 14, 15 as load detecting sensor D, and the load detecting base 11 is supported in four corners by load cells 16, 17, 18, 19. When a testee holding a club C swings it, the load added to the swing base 1 is shared by the load cells 12, 13, 14, 15, 16, 17, 18, 19 supporting the detecting bases 10, 11, and the load and load center of the testee and the load centers corresponding to the left and right feet of the testee are determined from their outputs. A control means displays the two-dimensional orbits of the foot form and the load center on a display means 4 in the state where they are conformed to the positional relation on the swing base 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swing table on which a subject who holds a ball hitting tool and hits a ball is placed, load measuring means for measuring the load centers of the left and right feet of the subject, and the measurement of the load measuring means. The present invention relates to a ball hitting practice machine provided with control means for outputting to the display means a two-dimensional locus of the load center of the whole body of the subject or the left and right feet of the subject based on the result.

[0002]

2. Description of the Related Art Such a ball hitting practice machine is used for practicing ball hitting motions such as golf and batting. It is known that in the practice of these ball hitting movements, whether or not the center of gravity moves correctly with the ball hitting movement is an important index for forming a correct ball hitting form. Therefore, in such a golf practice machine, a two-dimensional locus of the subject's foot shape and the load center of the subject's entire body or each of the left and right feet during the ball striking motion is displayed in a state associated with the positional relationship on the swing table. In the case of displaying on the means, conventionally, the foot shape of the subject and the position of the foot shape on the swing table are detected in advance before the start of the ball hitting motion. That is, for example, the body of the subject is rocked in the front-back direction, the movement locus of the load center corresponding to each of the left and right feet at that time is measured, and the foot shape of the subject and the swing of the foot shape are measured based on the movement locus. The position on the table was previously detected (see Japanese Patent Application No. 4-71798 already proposed by the applicant).

[0003]

Generally, when a measurement result (two-dimensional locus of the load center of the whole body of the subject or the left and right feet) of the subject during hitting motion is displayed, the positional relationship between the measurement result and the foot is displayed. Clarification makes it possible to analyze the movement of the center of gravity associated with a ball hitting motion more accurately. For this reason, conventionally, as described above, after measuring the foot shape of the subject and the position of the foot shape on the swing table in advance, the ball striking operation is performed, so that the foot position changes every time the foot position changes. Had to perform a ball hitting motion. By the way, in the practice of hitting motion, it is actually very difficult to perform hitting motion continuously without changing the position of the foot, and the position of the foot changes a little each time the hitting motion is performed. Is common. The present invention has been made in view of the above circumstances, and an object thereof is to easily change the position of the foot in the ball-striking motion even when performing the ball-hit motion by freely changing the position and stance of the subject. It is to provide a convenient ball hitting exercise machine that can be accurately detected.

[0004]

SUMMARY OF THE INVENTION A ball hitting practice machine according to the present invention comprises a swing table on which a subject who holds a ball hitting tool and hits a ball is placed, and a load measuring means for measuring the load centers of the left and right feet of the subject. A control means for outputting to the display means a two-dimensional locus of the load center of the whole body of the subject or each of the left and right feet during the ball striking operation based on the measurement result of the load measuring means, In the first characteristic configuration, the control means detects the foot shape of the subject and the position of the foot shape on the swing table based on the measurement result of the load measuring means during a ball striking motion, and the foot shape and the load center are detected. The two-dimensional locus of No. 1 is displayed on the display means in a state of being associated with the positional relationship on the swing table. In a second characteristic configuration, the control means extracts, as a reference position, a position on the swing base of a load center located closest to the toe side among load centers of the left and right feet of the subject during a ball hitting motion, and the reference It is configured to detect the foot shape and the position of the foot shape on the swing base based on the position.

[0005]

According to the first characteristic configuration of the present invention, when a subject rides on a swing table and makes a ball hitting motion, the two-dimensional locus of the load center and the foot shape during the ball hitting motion are in a positional relationship on the swing table. Is displayed on the display means in a state associated with. Therefore, the foot shape and the position of the foot shape on the swing table can be detected without performing a special measurement such as swinging the body of the subject in the front-back direction to measure the foot position. . According to the second characteristic configuration, the position on the swing table of the load center located closest to the toe side among the load centers of the left and right feet of the subject during the hitting motion is extracted as the reference position, and based on the reference position. ,
The foot shape and the position of the foot shape on the swing table can be detected. So for golf swings,
Near the top position, the load center of the left foot moves to the most toe side of the left foot near the base of the left toe, and near the finish point the load center of the right foot moves to the base of the right toe that is the most toe side of the right foot. Therefore, by detecting the position on the swing table of the load center located closest to the toe side among the load centers of the left and right feet of the subject during the ball striking motion, the vicinity of the base of the left and right toes can be accurately detected. You will be able to do it.

[0006]

According to the first characteristic configuration, the foot shape and the position of the foot shape on the swing table can be detected without performing a special measurement. Therefore, the batting motion practice machine is more convenient. Came to be able to. According to the second characteristic configuration, it is possible to accurately detect the vicinity of the bases of the left and right toes, and thus it is possible to accurately detect the foot shape and the position of the foot shape on the swing table. Can be provided.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment in which the present invention is applied to a golf practice machine will be described below with reference to the drawings. 1 to 3,
1 is a swing table, 2 is a ball mounting table, 3 is a processing device, and 4 is a display device as a display means. During the swing, the golf training machine of the present embodiment processes the detection data of the load detection sensor D provided on the swing base 1 by the processing device 3 to display the load center on the display device in real time, and The time-series data centered on the load is temporarily stored and displayed after the swing is completed. Hereinafter, each device will be described.

The swing base 1 comprises two load detection bases 10 and 11 corresponding to the left and right feet respectively.
Is the four load cells 12, 1 as the load detection sensor D
The four corners are supported by 3, 14, and 15, and the load detection base 11 is supported by the four load cells 16, 17, 18, and 19 as the load detection sensor D at the four corners. On the swing table 1, the subject holding the club C swings. At this time, the load applied to the swing base 1 is the eight load cells 12, 13, 14, 15, 16, 17, 18, 1 supporting the two load detection bases 10, 11.
The load and the load center of the subject and the load centers corresponding to the left and right feet of the subject are obtained from these outputs as will be described later.

A support tool 25 for mounting the ball 24 when performing a swing practice with a wood club or the like is mounted on the ball mounting table 2, and the swing tool 1 side of the support tool 25 has an iron club or the like. A marker 70 indicating the position where the ball is directly placed on the ball placing table 2 when the swing is practiced is drawn. Then, a ball detection sensor 21 as a ball presence / absence detecting means for detecting the presence / absence of the ball 24 is provided on both sides of the support tool 25 and the marker 70 sandwiching the club head passage. The ball detection sensor 21 functions as a reset switch for starting a new swing when the ball 24 is placed on the support tool 25 or the marker 70, and also on the support tool 25 or the marker 7.
The time when the ball 24 on 0 is hit by the club C and disappears from the support 25 is detected as an impact point which is one of the characteristic points in the golf swing. A club detection sensor 22 for detecting the movement of the club C to the backswing side is provided on both sides of the support tool 25 and the marker 70 on both sides of the club head passage on the backswing side.

Sphere detection sensor 21 and club detection sensor 2
Each of 2 is composed of a transmissive optical sensor. As for the arrangement of these sensors, the light emitting portion 21a of the ball detection sensor 21 and the light emitting portion 22a of the club detection sensor 22 are installed on the side of the club head passage opposite to the swing base 1, and the club heads of these light emitting portions 21a, 22a are arranged. A light receiving portion 21b of the ball detection sensor 21 and a light receiving portion 22b of the club detection sensor 22 are installed opposite to each other across the passage, facing the respective light emitting portions 21a, 22a. The detection light emitted from the light emitting portion 21a of the sphere detection sensor 21 is located on the light receiving portion 21 diagonally below.
Although it is projected toward b, this detection light passes through the region where the sphere 24 above the support tool 25 and the marker 70 should exist, and when the sphere 24 is placed on the support tool 25,
Even when the sphere is placed on the marker 70, the presence or absence of the sphere 24 can be similarly detected. The projection path of the detection light of the club detection sensor 22 is set to be substantially parallel to the projection path of the detection light of the sphere detection sensor 21, and even when the sphere 24 is placed on the support tool 25, the marker 70 is used. If you put a ball on top,
The passage of the club can be detected without fail.
The drive circuit for the ball detection sensor 21 and the club detection sensor 22 is built in the control box 26.

The processing device 3 includes a calculation device 31 for performing a calculation process for obtaining a load and a load center and a sequence control of the device, an I / O interface 32 for transferring various data, and a load and a load center measurement information. It comprises a storage device 33 for storing, an operation console 34 for selecting an operation mode of the device and inputting various comments, an external storage device 35 for storing measurement information and the like. The display device 4 comprises a graphic display device 4a and a plotter 4b. The graphic display device 4a has a two-dimensional locus of the load center of the entire body, left and right feet, and a two-dimensional locus of the load ratio of the whole body (time change). However, a two-dimensional locus (change with time) of the load ratio of the whole body is displayed on the plotter 4b.

Next, the process of calculating the load and the load center by the arithmetic unit 31 will be described. The test subject who holds the club C stands in a substantially center position on the swing table 1 while standing with the left and right feet on the two load detection tables 10 and 11, respectively. Taking the load detection table 10 on which the subject places his left foot as an example, the outputs of the load cells 12, 13, 14, 15 at the four corners of the load detection table 10 are adjusted in advance by zero adjustment in the load converter 100. Since the loads are canceled out, the total WL of the outputs W1, W2, W3, W4 becomes the load of the left foot of the subject on the load detection table 10. That is, WL = W1 + W2 + W3 + W4 Furthermore, at this time, since the shared output of each load cell differs depending on the relationship between the position where the load is applied and the installation position of the four load cells 12 to 15, the load applied to the load detection base 10 from these outputs. You can seek the center.

That is, regarding the left-right direction component X and the front-back direction component Y of the load center expressed with the load cell 12 in FIG. 1 as the origin, the four load cells 12 to 15 have the width a in the X direction and the width in the Y direction. In the case of being arranged at the four corners of the rectangular load detection base 10 of b, it can be obtained from X = (W2 + W3) × a / WL Y = (W3 + W4) × b / WL. In addition, the load cells 12, 13,
Even when the arrangements of 14 and 15 are not at the four corners of the rectangle, the load center can be obtained by performing the correction unique to the geometrical arrangement of the load cells. Further, if three or more load cells are provided, the center of load applied to the swing table 1 can be obtained. The load detection base 11 on which the subject places his right foot is also configured the same as the load measuring device 10, and the load center of the load applied to the load detection base 11 can be obtained in the same manner as above. That is, the load centers corresponding to the left and right feet of the subject can be obtained.

As for the load and center of load of both legs of the subject, that is, the whole body, the load applied to the load detection base 11 is W.
If it is R, as in the case of the left foot above, the load cell 16
From the outputs W5 to W8 of ~ 19, WR = W5 + W6 + W7 + W8 The overall load WT is obtained by WT = WL + WR, and the load center is the distance between the load center corresponding to the left foot and the load center corresponding to the right foot of the subject. If it is L, it is located at a position WR × L / WT away from the load center corresponding to the left foot on the line segment connecting the left and right load centers, and this can be calculated.

As shown in FIG. 3, eight load cells 12 ...
Outputs W1 to W4 and W5 to W8 of 15 and 16 to 19
Is a load converter 100 equipped with a measurement bridge circuit and an A / D converter, and after compensating for the weight of the swing table 1 as described above, it is sampled at regular intervals and becomes a digital quantity. Then, it is sequentially loaded into the processing device 3 via the I / O interface 32. The load WT of the subject, the load center, and the load centers corresponding to the left and right feet are calculated by the arithmetic unit 31 in the processing device 3 according to the above-described formula. Then, the arithmetic unit 31 displays the obtained load centers corresponding to the entire body of the subject and each of the left and right feet on the graphic display device 4a of the display device 4 in real time, and the time series data of the load and the subject The time series data of the load center corresponding to each of the left and right feet and the load center corresponding to the entire body of the subject are stored in the storage device 33. Further, the arithmetic unit 31 divides the obtained loads corresponding to the whole body of the subject and each of the left and right feet by the weight value of the subject to obtain the load ratio, and the time series data of these load ratios is stored in the storage device. 33
Remember. The weight value of the subject is obtained by averaging the weight values of the entire body of the subject before the start of the swing.

Therefore, the arithmetic unit 31 functions as a load measuring unit M for measuring the load center of each of the left and right feet of the subject and also as a control unit for controlling the display of the display unit 4.

The time-series data is stored by the sphere detection sensor 21 after the sphere detection sensor 21 detects that the sphere 24 is placed on the support 25 or the marker 70 and resets the apparatus. The data up to the impact point for detecting that the ball 24 on the tool 25 or the marker 70 has been hit and lost is sequentially updated to the oldest data in the storage area of the storage device 33 having an appropriate storage capacity. The data is stored endlessly so that the data after the impact point is stored in another storage area having a storage capacity corresponding to a predetermined time width.

With these time-series data, the load center of each of the left and right feet of the subject at the time of address, the load center of the whole body of the subject, the load ratio of the left foot at the time of address,
The whole body of the subject at the swing start point, the load center corresponding to each of the left and right feet and the load ratio of the whole body of the subject, the load center and the load ratio of the whole body at the body turn start point, the load center of the whole body at the top position, Load ratio, right foot load ratio, whole body load center and load ratio at the swing-down point, whole body load center at the impact point, load ratio, and left foot load ratio, whole body load center and load at the finish point The ratio is also stored in the storage device 33. Each load center at the time of address is obtained by averaging the positions of the load centers before the swing start point detected as described later.

Next, a process in which the club detection sensor 22 and the arithmetic unit 31 detect the swing start point which is one of the characteristic points in the golf swing will be described. In the storage device 33, together with the above-mentioned load and load center data,
Information on whether or not the club detection sensor 22 has detected the passage of the club head is also stored in time series. Based on this stored information, the arithmetic unit 31 excludes the time of about 100 mS immediately before the impact point and sets the time when the first club detection sensor 22 detects the passage of the club head as the swing start point by tracing back the time from the impact point. To detect.

Next, a process in which the arithmetic unit 31 detects a body turn start point which is one of characteristic points in a golf swing will be described. Of the load and load center data obtained by the computing device 31 as described above and stored in the storage device 33, the time change of the load on the lower leg of the subject in the backswing direction shown in FIG. 4, that is, the present embodiment. Since the device configuration for a right-handed test subject is illustrated by way of example, when the load on the right foot changes with time, the search starts from the data corresponding to the swing start point indicated by point A in FIG. The position of B on the time axis is detected as the body turn start point.

Next, the process in which the arithmetic unit 31 detects the top position which is one of the characteristic points in the golf swing will be described. The component in the left-right direction, that is, the X direction, of the load-series time series data corresponding to the entire body of the subject, which is obtained by the arithmetic unit 31 as described above and stored in the storage device 33, is time-differentiated to obtain the load-center X-value. The time change of the moving speed in the direction is calculated. In the time change of the moving speed in the X direction illustrated in FIG. 5, the point F, which is traced back for a predetermined time from the data of the impact point detected by the sphere detection sensor 21 indicated by the point E in FIG. Point F indicating the reference point
The data is searched backward in the direction from, and the sign of the moving speed in the X direction first reverses from negative to positive, that is, the point G at which the direction of the moving speed in the X direction first reverses is set as the top position. To detect. The time interval from the point E indicating the impact point to the point F, which is the reference time point, is set as a top position because the direction of the moving speed may be in the backswing direction immediately before the impact point. In order to prevent detection, this time interval is preferably about 200 mS.

Next, a process in which the arithmetic unit 31 detects a swing-down point which is one of characteristic points in a golf swing will be described. Among the data obtained by the arithmetic unit 31 as described above and stored in the storage unit 33, the point indicating the top position obtained as described above in the time change 90 of the right foot load and the time change 91 of the left foot load shown in FIG. From H,
Up to a point I indicating the impact point detected by the ball detection sensor 21 corresponds to the downswing. During this downswing, within the time t from the point J, which indicates the time when the load on the left and right feet of the subject becomes equal, to the side where time elapses and t ′ to the side that goes back time, the foot on the upper hand side in the downswing direction. The rate of change of the load on the right foot, that is, the time differential value is calculated. It is suitable that both the time widths t and t'are about 50 mS. The point K indicating the time point when the absolute value of the change rate of the time change 90 of the right foot load becomes the minimum value is detected as the swing-down point.

Incidentally, 0.2 seconds after the impact point detected by the ball detection sensor 21 is detected as a finish point which is one of the characteristic points in the golf swing.

Further, the arithmetic unit 31 can be operated only during a ball hitting motion.
Measurement result of the load measuring means M (that is, for each of the left and right feet)
Based on the load center)
Detecting the position on the ing platform 1 and checking its foot shape and load center
Corresponds the two-dimensional trajectory to the positional relationship on the swing base 1.
Display on the graphic display device 4a in the digit state
Is configured. That is, the arithmetic unit 31 determines that the ball is hit.
Of the load centers of the left and right feet of the subject in
The position on the swing base 1 of the load center located on the toe side
Reference position P ₀As the reference position P₀Based on
Then, as shown below, it is configured to create the left and right foot shapes f.
Has been.

Hereinafter, the reference position P₀Create foot form f based on
The left foot is taken as an example to explain the method of creating a foot shape. leg
The vertical width AL of is set to the initial value regardless of the subject's foot size.
(About 300 mm), the foot shape f is an ellipse f₁(Big
Ellipse) and f₂More formed (smaller ellipse)
Has been. Note that the ellipse f in this embodiment is₁The major axis of (A
L × 4/5) and the minor axis is set to (AL × 2/5)
Cage, ellipse f₂The major axis of (AL x 3/5), the minor axis is
It is set to (AL x 3/10). And the reference position
Setting P₀Ellipse f at (AL × 3/10)₁in
Heart point P ₁And set the center point P₁More (AL × 3/1
Ellipse f at 0)₂Center point P of₂To set. However
However, in the present embodiment, the center point P₂Is the center point P₁Against d
It is provided by shifting it inside x (about 10 mm).
Is to bring the foot shape f closer to the actual foot shape.
It doesn't have to move. The foot shape f is in front of the center of the load.
It is set to be parallel to the backward component Y.

Next, the operation of the apparatus in use will be described based on the flowchart of FIG. 8 and the display examples of FIGS. 9 to 11. In the flowchart of FIG. 8, after the power switch (not shown) is turned on to activate the device, the operator sets the operation mode of the device from the console 34 (step # 1). There are two operation modes, a reference trajectory display mode and a reference trajectory non-display mode. In the reference trajectory display mode, the time series data of the load center and the load ratio for comparison (ideal swing) stored in advance in the external storage device 35 is used as reference trajectory data, and the two-dimensional load center of the reference trajectory is used. Locus (movement locus)
Is displayed on the graphic display device 4a together with the display data of the load center relating to the new swing, and the two-dimensional trajectory (time change) of the load ratio of the reference trajectory is also displayed together with the two-dimensional trajectory of the load ratio relating to the new swing (time change). It is displayed on the plotter 4b. In the reference trajectory non-display mode, the data of the reference trajectory is not displayed, but only the display data regarding a new swing is displayed.

When either one of these two modes is selected to complete the setting of the operation mode, it is determined in step # 2 whether the operation mode is set to the reference locus display mode. If the operation mode is set to the reference locus non-display mode, the process proceeds to step # 5 without doing anything. If the reference locus display mode is set, the reference locus 40 and the reference locus 40 on the reference locus 40 are set. 42 to 48 indicating respective characteristic points (address, swing start, body turn start, top, swing down, impact, and finish points) on the graphic display device 4a (step # 4), and step # Go to 5.

In step # 5, the ball detection sensor 21
It is determined whether or not the sphere 24 is placed on the support tool 25 or the marker 70 based on the detection information of 1., and if the sphere 24 is not on the support tool 25 or the marker 70, the load corresponding to the entire body is obtained. The center of load and the center of load corresponding to each of the left and right feet are displayed in real time, and the process returns to step # 5.
That is, the detection data of the load detection sensor D is fetched (step # 14), and as shown in the display example of FIG. 9, arithmetic processing is performed to determine the load center corresponding to the whole body and the load center corresponding to each of the left and right feet. Is calculated (step # 15) and displayed on the graphic display device 4a as the load center point 50 of the left and right feet and the load center point 51 of the whole body, and the ratio of the load of the left and right feet to the total load (that is, ,
WL / WT and WR / WT) are calculated and displayed in the display columns 52 provided at the left and right ends of the display screen of the graphic display device 4a as ratio display points 53 so that the larger the ratio value is, the higher the ratio is. ). In the display example of FIG. 9, the reference locus display mode is selected in step # 1. After performing this screen control, the console 34
It is judged whether or not the mode change switch of is pressed (step # 17), and if it is pressed, the process returns to step # 1 and the operation mode can be set, and if not pressed, the process proceeds to step # 5. Return.

In step # 5, the ball 24 is moved to the support 2
5 is placed on the marker 70 or the marker 70, the device is in a reset state, load data of a new swing is collected, the data is calculated, and the load center and the left and right feet corresponding to the whole body are collected. The collected data is stored in the storage device 3 while the load center etc. corresponding to each is displayed in real time.
Remember in 3. That is, the stored data such as the reference trajectory and the display on the graphic display device 4a are left as they are, and the stored data corresponding to the previous swing and the display on the graphic display device 4a are cleared (step # 6). Then, the detection data of the load detection sensor D is taken in (step # 7), and the load and the load center of the whole body, the load center corresponding to each of the left and right feet, and the ratio of the load of each of the left and right feet to the total load. Is calculated and stored in the storage device 33, and the calculation result is displayed on the graphic display device 4a as the load center point 50 of the left and right feet, the load center point 51 of the whole body, and the ratio display point 53 (step # 8 and # 9).

After this screen control, it is judged whether or not the swing has already ended depending on whether or not a predetermined time has passed from the impact point (step # 10), and if the predetermined time has not passed, step # Return to position 7. When it is judged that the swing has already ended after a predetermined time has passed from the impact point, as shown in FIG. 10, the movement locus 55 of the load center of the whole body and the left and right feet of the completed swing are shown. Moving trajectory 5 of the corresponding load center
6, 57, the load ratio locus 71 of the whole body, and the foot shape f are displayed (step # 11). In addition, on the movement locus 55 of the load center of the whole body, marks 59 to indicate each characteristic point (address, swing start, body turn start, top, swing down, impact, and finish points).
65 is displayed, and marks 58 indicating the load centers corresponding to the left and right feet of the subject at the time of address are displayed on the movement loci 56 and 57 of the load centers corresponding to the left and right feet, respectively.

Further, at the upper end of the display screen of the graphic display device 4a, an address left foot load ratio 66 showing the ratio of the left foot load to the subject's weight value at the address, and a ratio of the right foot load to the subject's weight value at the top position. And a top right foot load ratio 67 indicating the above, and an impact left foot load ratio 68 indicating the ratio of the left foot load to the weight value of the subject at the impact point are displayed (step # 11). Note that, similarly to FIG. 9, FIG. 10 also shows a display example when the reference trajectory display mode is selected, and the display of the ratio display point 53 in the display column 52 indicates the state of the impact point. There is.

Further, as shown in FIG. 11, when the reference locus display mode is selected, the data 71 of time change of the load ratio of the whole body and the data 72 of time change of load ratio of the reference locus data are selected. And are displayed on the plotter 4b so that the impact time points coincide with each other (step # 11). Then, on the display of the data 71 of the time change of the load ratio of the whole body, marks 60 to indicate each characteristic point (swing start, body turn start, top, swing down, impact, and finish). 65 is displayed, and the characteristic points (swing start, body turn start, top, swing down, impact, and finish points) are shown on the display of the time change data 72 of the load ratio of the reference trajectory data. The marks 43 to 48 are displayed. When the reference trajectory non-display mode is selected, only the data 71 of the time change of the load ratio of the whole body is displayed on the plotter 4b. Further, the display of the load center on the graphic display device 4a displays the data from the swing start point to the finish point, the data 71 of the time change of the load ratio of the graphic display device 4a and the time change of the load ratio on the plotter 4b. The data 71 and 72 are displayed so as to display data for a predetermined time before and after the impact point.

After that, when the measured load and load center data are not saved, the process returns to the position where the presence or absence of the sphere 24 is detected, and when saved, the measured data is transferred to the data saving area of the storage device 33 ( Steps # 12 and # 1
3) Return to the position of step # 5.

[Other Embodiments] Other embodiments of the present invention will be listed below. In the above embodiment, the vertical width and the lateral width of the foot are set in advance irrespective of the foot size of the subject, and the load located on the most toe side among the load centers of the left and right feet of the subject during the ball striking motion. the position of the swing table 1 of the center are extracted as the reference position P _0, on the basis of the reference position P _0, but so as to create a lateral footprint f, to create a forming method and footprint footprint f Dimension of each part (Vertical width A of the foot
L, the width of the foot) can be variously changed. For example,
The vertical width and the horizontal width of the foot can be adjusted to the console 3 each time the subject changes.
It may be possible to change it by inputting at 4. In the case of a golf swing, the weight center of the right foot moves and the body rotates to move the load center near the base of the left toe near the top position. At the finish point, the weight moves to the left and the body rotates. As a result, the load center moves to the vicinity of the base of the toe of the right foot, so that the load center at the top position of the right foot is the reference position P _{0 of the} right foot and the load center at the finish point of the left foot is the reference position P _{0 of the} left foot. Then, the foot shape f may be created. Further, the vertical width AL of the foot may be determined by the address point 58 and the reference position P ₀ described above. That is, for example, the vertical width AL of the foot may be set to be twice the width between the address point 58 and the reference position P ₀ . At this time, the vertical width AL of both feet is determined by the address point 58 of one of the feet and the reference position P _0.
Alternatively, the vertical widths AL of both feet may be determined by averaging the vertical widths of the left and right feet obtained from the address points 58 of the left and right feet and the reference position P _0. You can Further, the vertical width AL of the foot is determined by the address point 58 and the reference position P ₀ described above, and the foot shape f is created so that the address point 58 is located at a predetermined position of the foot shape (for example, the position of the arch). You can Further, the foot shape f may be created so that the foot shape f passes through the reference position P ₀ described above. That is, the foot shape f may be created with the reference position P ₀ as the tip of the foot. Further, the lateral width of the foot may be determined from the lateral width of the movement loci 56, 57 of the load center corresponding to the left and right feet, respectively. For example, the lateral width of the movement loci 56, 57 or a width obtained by multiplying the lateral width by a predetermined value may be set as the lateral width of the foot. Further, in the above embodiment,
The foot shape f is set to be parallel to the front-back direction component Y of the load center, but the foot direction (direction) is set to be the direction of the straight line connecting the address point 58 and the reference position P _0. May be. In the above-described embodiment, the plotter 4b shows the two-dimensional loci (movement loci) of the load center of the entire body, the left and right feet, and the load ratio of the whole body on the graphic display device 4a.
Although the time change of the load ratio of the entire body is displayed on the display, the two displays may be interchanged and displayed, and the time change of the load ratio of each of the left and right feet may be displayed on the plotter 4b as reference locus data. The load ratios of the left and right feet may be displayed together with the change over time, and the load ratios of the left and right feet may be compared and evaluated. In the above embodiment, the marks 58 indicating the load centers corresponding to the left and right feet of the subject at the time of address are displayed on the movement loci 56 and 57 of the load centers corresponding to the left and right feet, respectively. You may make it display the mark which shows the load center corresponding to a feature point.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a plan view of a golf training machine to which the present invention is applied.

FIG. 2 is a side view of a golf training machine to which the present invention is applied.

FIG. 3 is a block diagram of a golf training machine to which the present invention is applied.

FIG. 4 is a diagram showing detection of a body turn start point.

FIG. 5 is a diagram showing detection of a top position.

FIG. 6 is a diagram showing detection of a swing-down point.

[Figure 7] Footprint creation explanatory diagram

FIG. 8 is a flowchart according to an embodiment to which the present invention is applied.

FIG. 9 is a display example of a load center and the like according to an embodiment to which the present invention is applied.

FIG. 10 is a display example of foot shapes and the like according to an embodiment to which the present invention is applied.

FIG. 11 is a display example of a time change of a load ratio according to an embodiment to which the present invention is applied.

[Explanation of symbols]

 1 Swing Table 4 Display Means 31 Control Means C Hitting Tool M Load Measuring Means

Claims (2)

[Claims] 1. A swing table (1) on which a subject who holds a hitting ball (C) and hits is placed, a load measuring means (M) for measuring load centers of the left and right feet of the subject, and the load measurement. A hitting ball provided with a control means (31) for outputting to the display means (4) a two-dimensional locus of the load center of the whole body of the subject or each of the left and right feet during the hitting motion based on the measurement result of the means (M). An exercise training machine, wherein the control means (31) is based on a measurement result of the load measuring means (M) during a ball striking motion, and the foot shape of the subject and the position of the foot shape on the swing table (1). Is detected, and the foot shape and the two-dimensional locus of the load center are displayed on the display means (4) in a state of being associated with the positional relationship on the swing table (1). A ball hitting training machine. 2. The control means (31) uses, as a reference position, a position on the swing table (1) of a load center located closest to the toe side among load centers of the left and right feet of the subject during a ball hitting motion. 2. The ball hitting training machine according to claim 1, which is configured to be extracted and to detect the foot shape and the position of the foot shape on the swing table (1) based on the reference position.