JP2786580B2 - Hitting motion practice machine - Google Patents

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 hits a ball while holding a hitting tool is placed, and a load measuring means for measuring the load center of the whole body or each of the right and left feet on the swing table. Control means for displaying a measurement result of the measurement means as a point-like mark in real time within a display range of the display means in a state in which the measurement result is associated with a position of the swing table in a plan view. Hitting motion training machine.

[0002]

2. Description of the Related Art Such a ball hitting practice machine is used for practicing hitting motions such as golfing and batting. In practicing these hitting motions, the center of gravity accompanying the hitting motion is correctly shifted. It is known that whether or not it is performed is an important indicator for forming a correct hitting ball form. Therefore, in such a hitting ball training machine, the center of load of the whole body or each of the right and left feet on the swing table is measured, and the measurement result is represented as a dot-like mark, and the position of the swing table in plan view. In the display range of the display means in real time. When the user wants to practice in real time while checking the state (position) of the load center of the entire body or each of the left and right feet (for example, wants to stop at the top position in the swing motion and to know the moving state of the load center at that time) In this case, the display means may display the footprint of the subject in a state in which the footprint of the subject is associated with the position of the swing table in plan view, and the position of the load center of the entire body or the right and left feet with respect to the display position of the footprint may be determined. At first glance, it is possible to grasp the moving state of the center of load of the whole body or each of the right and left feet, which is very convenient. Therefore,
Conventionally, the weight of the subject is swung in the front-rear direction, the footprint and the position of the footprint on the swing table are detected from the movement locus of the load center of the right and left feet at that time, and the footprint is displayed on the display means. After that, a mark indicating the load center of the whole body or each of the right and left feet due to the swing motion or the like is displayed in real time (real time) (see Japanese Patent Application No. 4-71798 already proposed by the present applicant). .

[0003]

Therefore, in the above-described conventional hitting motion training machine, the footprint is detected by swinging the weight in the front-rear direction, so that a relatively accurate footprint can be detected. There is a problem that it takes time and effort to detect the footprint, and if the position of the foot is shifted due to continuous swing operation or the like, the above-mentioned footprint detection has to be performed again every time the foot is displaced. Therefore, improvement has been desired. The present invention has been made in view of the above circumstances, and its purpose is to easily detect the position of the foot at that time even when performing a swing motion or the like while freely changing the position or stance where the subject stands. It is an object of the present invention to provide a hitting motion training machine capable of performing a hitting motion.

[0004]

SUMMARY OF THE INVENTION A hitting ball practice machine according to the present invention measures a swing table on which a subject who hits a ball while holding a hitting tool is placed, and the center of load of the entire body or each of the right and left feet on the swing table. The load measuring means to be measured and the measurement result of the measuring means as a point-like mark, and in a state corresponding to the position of the swing table in plan view, real-time display within the display range of the display means. The first characteristic configuration is provided with instruction means for instructing the control means to create a footprint, and the control means instructs the footprint creation by the instruction means. As a result, the footprint of the subject and the position of the footprint on the swing table are detected based on the measurement results of the measurement means during the time set back from the designated time, and the footprint is detected by the swing. In a state of association with the positional relationship on the base, in that it is configured to display on the display means. The second characteristic configuration is that, when the control means is instructed to create the footprint, the load center is set in accordance with a hitting operation on the swing table based on a measurement result of the measuring means at the time of the instruction. The present invention is characterized in that the measurement result and the footprint are displayed in a state where the appearing subject existence range is obtained and the subject existence range corresponds to the display range of the display means.

[0005]

According to the first characteristic configuration of the present invention, the center of load of the whole body or each of the right and left feet is displayed in real time on the display means with a dot-like mark, and further, for example, a companion (or instructor) And the like operate the instructing means to give an instruction to create a footprint by the instructing means. Based on the data (moving locus) of the load center of each of the left and right feet before the set time from the instruction time, the footprint and the footprint of the subject are obtained. The position of the footprint on the swing table is detected, and the detected footprint is displayed on the display means. Second
According to the characteristic configuration, when an instruction to create a footprint is issued by the instruction means, the subject existence range in which the load center appears (that is, the left and right foot existence ranges on the swing table) based on the measurement result of the measurement means at that time. ) Is detected, and the subject existence range is enlarged and displayed so as to correspond to the display range of the display means, that is, the right and left footprints are displayed over or almost entirely within the display range of the display means.

[0006]

According to the first characteristic configuration, the footprint is displayed based on the data of the center of load of each of the right and left feet before the point in time when the footprint is instructed from the instructing means. The footprint is easier to detect than the footprint detection method described above. Therefore, in such a hit ball motion training machine, even if the position where the subject stands or the stance is freely changed and a swing motion is performed, the position of the foot at that time can be easily detected. According to the second feature configuration, when an instruction to create a footprint is given by the instruction means, the left and right footprints are enlarged and displayed so as to be displayed over the entire or almost entire display area of the display means. The movement state of the whole or the center of load of the left and right feet becomes easy to see,
It has become possible to provide a hitting motion practice machine that is easier to practice.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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, 4 is a display device as a display means. The golf practice machine of the present embodiment processes the detection data of the load detection sensor D provided on the swing table 1 by the processing device 3 during the swing, displays the center of the load on the display device in real time, and displays the load or This is temporarily stored as time-series data of the load center, and is displayed after the end of the swing. Hereinafter, each device will be described.

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

A support 25 on which a ball 24 is placed when practicing swinging with a wood club or the like is mounted on the ball mounting table 2. On the swing table 1 side of the support 25, an iron club or the like is mounted. A marker 70 indicating a position at which a ball is directly mounted on the ball mounting table 2 during swing practice is drawn. A ball detection sensor 21 is provided on both sides of the support member 25 and the marker 70 across the club head passage, as a ball presence / absence detection means for detecting the presence / absence of the ball 24. The sphere detection sensor 21 functions as a reset switch when starting a new swing when the sphere 24 is placed on the support 25 or the marker 70, and the sphere detection sensor 21 is provided on the support 25 or the marker 7.
The point at which the ball 24 on 0 is hit by the club C and no longer on the support 25 is detected as an impact point, which is one of the characteristic points in the golf swing. On both sides of the support 25 and the marker 70 across the club head passage on the back swing side, a club detection sensor 22 for detecting the movement of the club C to the back swing side is provided.

The ball detecting sensor 21 and the club detecting sensor 2
Each of the reference numerals 2 includes a transmission type optical sensor. The arrangement of these sensors is such that the light emitting portion 21a of the ball detecting sensor 21 and the light emitting portion 22a of the club detecting sensor 22 are installed on the opposite side of the swing head 1 in the club head passage, and the club head of the light emitting portions 21a, 22a is provided. On the opposite side of the passage, 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 so as to face the respective light emitting portions 21a, 22a. The detection light emitted from the light emitting portion 21a of the ball detection sensor 21 is received by the light
b, the detection light is made to pass through the area where the sphere 24 above the support 25 and the marker 70 should exist, and when the sphere 24 is placed on the support 25,
When a ball is placed on the marker 70, the presence or absence of the ball 24 can be similarly detected. The projection path of the detection light of the club detection sensor 22 is set so as to be substantially parallel to the projection path of the detection light of the sphere detection sensor 21. Even when the sphere 24 is placed on the support 25, the marker 70 When putting a ball on top,
It is possible to reliably detect the passage of the club.
Drive circuits for the ball detection sensor 21 and the club detection sensor 22 are built in the control box 26.

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

Next, a process in which the arithmetic unit 31 calculates the load and the center of the load will be described. The subject holding the club C takes a stance by standing at the approximate center of the swing table 1 with the left and right feet resting on the two load detection tables 10 and 11, respectively. Taking the load detection table 10 on which the subject puts the left foot as an example, the outputs of the load cells 12, 13, 14, and 15 at the four corners of the load detection table 10 are previously adjusted by zero adjustment in the load converter 100, respectively. Since the loads have been offset, the total WL of the outputs W1, W2, W3, and W4 is the load on the left foot of the subject on the load detection table 10. That is, WL = W1 + W2 + W3 + W4 Further, at this time, depending on the relationship between the position where the load is applied and the installation positions of the four load cells 12 to 15, the load output of each load cell is different. You can find the center.

That is, the left-right component X and the front-rear component Y of the load center expressed by the load cell 12 in FIG. 1 as the origin are represented by four load cells 12 to 15 having a width a in the X direction and a width Y in the Y direction. In the case of being disposed at the four corners of the rectangular load detection table 10 of b, it can be obtained from X = (W2 + W3) × a / WL Y = (W3 + W4) × b / WL. Note that the load cells 12, 13,
Even when the arrangement of 14 and 15 is not at the four corners of the rectangle, the center of load can be obtained by performing a correction unique to the geometric arrangement of the load cells. If three or more load cells are provided, the center of load applied to the swing table 1 can be obtained. The load detection table 11 on which the subject places the right foot is also configured in the same manner as the load measuring device 10, and the load center of the load applied to the load detection table 11 can be obtained in the same manner as described above. That is, the center of load corresponding to each of the right and left feet of the subject can be obtained.

For the load on both feet of the subject, that is, the entire body and the load center, the load applied to the load detecting
Let R be the load cell 16 as in the case of the left foot.
From the outputs W5 to W8 of １９19, WR = W5 + W6 + W7 + W8 The load WT of the whole body is obtained by WT = WL + WR, and the load center is the distance between the load center corresponding to the subject's left foot and the load center corresponding to the right foot. Assuming that L is on a line segment connecting the left and right load centers, it is located at a position WR × L / WT away from the load center corresponding to the left foot, and this may be calculated.

As shown in FIG. 3, eight load cells 12 to
Outputs W1 to W4 and W5 to W8 of 15 and 16 to 19
Is a load converter 100 having a measurement bridge circuit and an A / D converter. After compensating for the weight of the swing table 1 as described above, the load converter 100 is sampled at regular intervals to obtain a digital value. Then, the data is sequentially taken into the processing device 3 via the I / O interface 32. The load WT, the load center, and the load center corresponding to each of the left and right feet of the subject are obtained by the arithmetic unit 31 in the processing device 3 according to the above-described formula.

When the operator 34 instructs to create a footprint on the console 34, the arithmetic unit 31 calculates the load center data of the left and right feet before the set time from the instruction time.
The foot shape f of the subject and the position of the foot shape f on the swing table 1 are detected, the foot shape f is displayed on the graphic display device 4a of the display device 4, and the measurement results (the whole body or the load center of each of the left and right feet) are measured. ) As a dot mark (that is, as shown in FIGS. 9 and 10, the load centers of the right and left feet are displayed by marks 48, and the load centers of the entire body are displayed by marks 49). ) Is configured to be displayed.

The creation of the footprint f by the arithmetic unit 31 is as follows.
Of the load center data of the left and right feet before the set time is instructed from the time at which the footprint creation is instructed, the position of the load center located on the toe side on the swing table 1 is extracted as the reference position P ₀ , Based on the position P ₀ , the left and right footprints f are formed as described below.

Hereinafter, the reference position P₀Create a footprint f based on
The method of creating a footprint is described in FIG. 7 using the left foot as an example.
I will tell. The vertical width AL of the foot is independent of the subject's foot size
Initially set (approximately 300 mm),
Circle f₁(Larger ellipse) and f_Two(Small ellipse) and
Is formed. Note that the ellipse f in this embodiment is₁of
The major axis is (AL x 4/5) and the minor axis is (AL x 2/5)
Set and the ellipse f_TwoThe major axis is (AL x 3/5)
In addition, the minor axis is set to (AL × 3/10). Soshi
And the reference position P₀Ellipse at (AL × 3/10)
Circle f₁Center point P of ₁And set the center point P₁More (A
L × 3/10) ellipse f_TwoCenter point P of_TwoThe set
I do. However, in this embodiment, the center point P_TwoTo the center point P
₁To the inside of dx (about 10 mm)
This is to make the footprint f closer to the actual footprint.
It is not always necessary to shift. Note that the footprint f is a load
Is set in advance so as to be parallel to the longitudinal component Y of the center of gravity.
Is defined.

When the operator does not give an instruction to create a footprint on the console 34, the arithmetic unit 31 sets a state where the existence range of the swing table 1 corresponds to the display range of the graphic display device 4a as shown in FIG. In other words, in a state where the outer circumference 50 of the swing table 1 in a plan view is displayed almost over the entire display range of the graphic display device 4a, the measurement results (the load center 49 of the whole body, the load center 48 of each of the left and right feet) are displayed. ) Is displayed (actual display), and as the footprint creation is instructed on the console 34, as shown in FIG. Existence range where the load center appears (that is,
The range of the left and right feet on the swing table 1)
A state in which the subject existence range corresponds to the display range of the graphic display device 4a (that is, the load center 4 of the left and right feet)
8 in a state where the width in the X direction is enlarged so as to be displayed over substantially the entire display range of the graphic display device 4a), and the measurement result (the load center 49 of the whole body, the load center of each of the left and right feet) is obtained. 48) and the footprint f are displayed (enlarged display).

In the figure, V indicates the width in the X direction of the load center 48 of the left and right feet before enlargement, and V 'indicates the width in the X direction of the load center 48 of the left and right feet after enlargement. FIG.
In the enlarged display of FIG. 10, in the present embodiment, X
In the direction and Y direction at the same set magnification (V '/ V),
The center of the load center of the right and left feet is the graphic display 4
It is displayed so as to be located at the center position 80 of the display range a. Therefore, the width in the X direction of the load center 48 of the left and right feet at the time of enlargement is always set to V ′.

Further, the arithmetic unit 31 stores, in the storage unit 33, the time series data of the load, the load center corresponding to each of the right and left feet of the subject, and the time center data corresponding to the entire body of the subject. At the same time, the load corresponding to the whole body of the subject and each of the right and left feet is divided by the subject's weight value to obtain a load ratio, and time-series data of the load ratio is stored in the storage device 33. 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 the entire body or each of the right and left feet on the swing table 1 and also functions as a control unit R for controlling the display of the display device 4. I do. Operation console 34
Functions as instruction means T for instructing the arithmetic unit 31 to create a footprint.

The above-mentioned time-series data is stored by the sphere detecting sensor 21 when the sphere detecting 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 with the oldest data in the storage area of the storage device 33 having an appropriate storage capacity. And the data after the impact point is stored in another storage area having a storage capacity corresponding to a predetermined time width.

Along with these time series data, the load center of the whole body and the left and right feet and the left and right feet at each characteristic point (address point, body turn start point, top position, swing down point, impact point, finish point). Each load ratio is also stored in the storage device 33. Each load center at the address point is obtained by averaging the positions of each load center 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 a swing starting point which is one of the characteristic points in the golf swing will be described. In the storage device 33, together with the data of the load and the load center,
Information as to whether or not the club detection sensor 22 has detected passage of the club head is also stored in chronological order. Based on the stored information, the arithmetic unit 31 sets the time when the first club detection sensor 22 detects the passage of the club head retroactively from the impact point, except for the time of about 100 ms immediately before the impact point, as the swing start point. To detect.

Next, a process in which the arithmetic unit 31 detects a body turn starting point which is one of the characteristic points in the golf swing will be described. Of the load and load center data obtained by the arithmetic unit 31 and stored in the storage device 33 as described above, the time change of the load on the lower leg of the subject in the backswing direction shown in FIG. FIG. 4 illustrates a device configuration for a right-handed subject, so that a search is started from the data corresponding to the swing start point indicated by point A in FIG. The position on the time axis of B is detected as the body turn start point.

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

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

It should be noted that 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.

Next, the operation of the apparatus in use will be described with reference to the flowchart of FIG. 8 and the display examples of FIGS. In the flowchart of FIG. 8, after the power switch (not shown) is turned on to start the apparatus, the operator sets the operation mode of the apparatus from the console 34 (step # 1), and proceeds to step # 2. 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 (for an ideal swing) and the load ratio, which are stored in the external storage device 35 in advance, are used as reference trajectory data, and the two-dimensional load center of the reference trajectory is used. The trajectory (movement trajectory) 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 of the load ratio of the reference trajectory (time change)
Is displayed on the plotter 4b together with the two-dimensional locus (time change) of the load ratio for the new swing. In the reference trajectory non-display mode, the data of the reference trajectory is not displayed, and only the display data related to the new swing is displayed.

In step # 2, the ball detection sensor 21
It is determined whether or not the ball 24 is placed on the support 25 or the marker 70 based on the detection information. If the ball 24 is not on the support 25 or the marker 70, the load corresponding to the entire body is determined. A real-time display of the load center corresponding to the center and each of the right and left feet is performed, and the process returns to step # 2. That is, the detection data of the load detection sensor D is fetched (step # 11), and arithmetic processing is performed to obtain a load center corresponding to the whole body and a load center corresponding to each of the left and right feet (step # 12), and to create a footprint. Is not instructed (step # 13), as shown in the display example of FIG. 9, the load center point 48 of the left and right feet and the load center point 49 of the whole body are respectively actually displayed on the graphic display device 4a (the outer periphery 50). Is displayed), and the ratio of the load of each of the left and right feet to the total load (that is, WL / WT and WR / W
T) is obtained and displayed as a ratio display point 62 in a display column 61 provided at both right and left ends of the display screen of the graphic display device 4a so that the larger the ratio value is, the higher the ratio value is.
14).

If creation of a footprint is instructed (step # 1)
3) The footprint f is detected based on the data of the load centers of the right and left feet before the set time (about 50 mS in this embodiment) from that time, and the footprint f is displayed in an enlarged display.
However, when the footprint f is displayed, if the operation mode is set to the reference trajectory display mode (step # 15), FIG.
As shown in FIG. 0, marks 42, 44, and 46 indicating each feature point (address point, top position, and impact point) on the reference trajectory 40, along with the reference trajectory 40 of the left and right feet and the reference trajectory 41 of the whole body. And marks 42 to 47 indicating respective characteristic points (address point, body turn start point, top position, swing-down point, impact point, and finish point) on the reference trajectory 41 are displayed in accordance with the position of the footprint f. If the operation mode is set to the reference trajectory non-display mode (step # 16) (step # 15), the display of those reference trajectories is not performed (step # 17).

After performing the screen control, it is determined whether or not the operation mode change switch of the console 34 is pressed (step # 18). If the switch is pressed, the process returns to step # 1 to set the operation mode. The state becomes possible, and if not pressed, the process returns to step # 2. The instructions for creating the footprint are
A companion (or instructor, etc.) is configured to operate the console 34, and the companion looks at the display and determines whether or not the display of the footprint f is correct (for example, the left and right feet). If it is determined that the display of the footprint f is incorrect if the load center 48 protrudes from the footprint f), an instruction to create a footprint (an instruction to rewrite the footprint) is output from the console 34. Note that the display example of FIG. 10 illustrates a case where the reference trajectory display mode is selected in step # 1.

In step # 2, the ball 24 is
5 or on the marker 70, the device is in a reset state, the load data of a new swing is collected, the data is calculated, the load center corresponding to the whole body, and the right and left feet The collected data is stored in the storage device 3 while displaying the corresponding load centers and the like in real time.
Go to 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 # 3). Then, the detection data of the load detection sensor D is taken in (step # 4), 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 in the storage device 33 and stored in the storage device 33, and the calculation result is displayed on the graphic display device 4a as the load center point 48 of the left and right feet, the load center point 49 of the whole body, and the ratio display point 62 (step #). 5 and # 6).

After this screen control, it is determined whether or not the swing has already been completed based on whether or not a predetermined time has elapsed from the impact point (step # 7). Return to position 4. When it is determined that the swing has already been completed after a predetermined time has elapsed from the impact point, as shown in FIG. 11, the movement locus 51 of the load center of the whole body and the left and right feet for the completed swing are respectively shown in FIG. Is displayed, and the characteristic points (address point, body turn start point, top position, swing down point, impact point, and Marks 53 to 58 indicating finish points are displayed, and marks 53 and 55 indicating respective characteristic points (address points, top positions, and impact points) are provided on the movement locus 52 of the load center corresponding to each of the left and right feet. , 57 (step #)
8). Note that FIG. 11 also shows a display example when the reference trajectory display mode is selected, as in FIG. 10, and the display of the ratio display point 62 in the display column 61 shows the state of the impact point. It is.

Further, as shown in FIG. 12, when the reference trajectory display mode is selected, the data 63 of the time change of the load ratio of the whole body and the data 64 of the time change of the load ratio of the reference trajectory data. Are displayed on the plotter 4b so that the impact times coincide (step # 8). And, on the display of the data 63 of the time change of the load ratio of the whole body, marks 54 to 58 indicating each characteristic point (a body turn start point, a top position, a swing-down point, an impact point, and a finish point) are displayed. Marks 43 to 47 indicating the characteristic points (body turn start point, top position, swing down point, impact point, and finish point) are displayed on the display of the time change data 64 of the load ratio of the reference trajectory data. Is displayed. When the reference trajectory non-display mode is selected, only the data 63 of the time change of the load ratio of the whole body is displayed on the plotter 4b. The display of the center of load on the graphic display device 4a is performed by displaying data from the swing start point to the finish point using the plotter 4.
The display of the time change data 63 and 64 of the load ratio at b
It is configured to display data for a predetermined time before and after the impact point, respectively.

Thereafter, if the measured load and the data of the load center are not stored, the process returns to the position (step # 2) for detecting the presence or absence of the ball 24.
After transferring the measurement data to the data storage area of No. 3 (steps # 9 and # 10), the process returns to the position of step # 2.

[Other Embodiments] Other embodiments of the present invention will be listed below. In the above embodiment, the display is switched to the enlarged display in accordance with the instruction to create the footprint on the console 34. However, a display switching instruction means for instructing the enlarged display is separately provided,
The display may be switched separately from the instruction to create a footprint. In the above embodiment, the accompanying person operates the console 34 to instruct creation of a footprint. However, the instruction method of instructing creation of a footprint can be variously changed. For example, an instruction to create a footprint may be automatically output at every set time, or automatically after a predetermined time elapses after the operation mode is set (although it is not necessarily limited to the operation mode setting). An instruction to create a footprint may be output. Also, for example, the load center 48 of each of the left and right feet
Is the correct position for the position of the footprint f (within the proper range)
It is also possible to automatically output an instruction to create a footprint (an instruction to rewrite a footprint) if it is determined that the footprint is not appropriate. In the above embodiment, two load measuring tables are used.
Two or more of them may be provided, or a separate load detecting table for measuring the load of the entire body and the center of the load may be separately provided.
They may be arranged in one and two layers.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the structure shown in the attached drawings.

[Brief description of the drawings]

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

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

FIG. 3 is a block diagram of a golf practice 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;

FIG. 7 is an explanatory diagram illustrating creation of a footprint.

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

FIG. 9 is a display example according to an embodiment to which the present invention is applied.

FIG. 10 is a display example according to an embodiment to which the present invention is applied.

FIG. 11 is a display example according to an embodiment to which the present invention is applied.

FIG. 12 is a display example according to an embodiment to which the present invention is applied.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 swing table 4 display means C hitting tool M load measuring means R control means T indicating means

Claims (2)

(57) [Claims] 1. A swing table (1) on which a subject who hits a ball while holding a hitting tool (C) is placed, and a load measuring means for measuring a load center of the whole body or each of right and left feet on the swing table (1). (M) and a display unit (4) in a state where the measurement result of the measurement unit (M) is represented as a dot-like mark and is associated with the position of the swing table (1) in plan view. And a control means (R) for displaying in real time within the display range of (1), wherein the instruction means (T) for instructing the control means (R) to create a footprint is provided. The means (R) is configured to include, when a footprint is instructed by the instructing means (T), based on a measurement result of the measuring means (M) during a set time from the instructing time, based on a measurement result of the subject. Footprint and its position on the swing stand (1) A hit ball training machine configured to detect a position and display the footprint on the display means (4) in a state where the footprint is associated with a positional relationship on the swing table (1). 2. The control means (R), in response to an instruction to create the footprint, hits the ball on the swing table (1) based on a measurement result of the measuring means (M) at the time of the instruction. It is configured to obtain a subject existence range in which the load center appears along with the operation, and display the measurement result and the footprint in a state where the subject existence range corresponds to the display range of the display means (4). The hitting motion training machine according to claim 1.