JPH0685725B2 - Foot measuring device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foot measuring device for measuring a human foot shape, and designs and manufactures shoes conforming to a specific foot shape,
It is also used for accumulating basic data for manufacturing ready-made shoes, searching for shoes that fit a specific foot from a large number of ready-made shoes, and further modifying the ready-made shoes for a specific foot.

(Prior Art) In order to grasp the shape of a foot, a measurer, for example, a shoe fitter has hitherto directly applied a foot gauge, a scriber, a tape measure, a height gauge, etc. to the foot to measure the dimensions of each part. Since the measurement value is soft and differs depending on the magnitude of the measurement pressure, and requires skill in measurement, an automatic foot-type measuring instrument for contactlessly measuring the shape of the foot has recently been developed.

For example, place one foot of the person to be measured on a footrest that is fixed in a cantilever manner, move the displacement sensor in the length direction, width direction and height direction of this foot, or It is known that the distance to the foot is measured while rotating the above displacement sensor around, and calculation is performed based on this measured value and the displacement amount of the displacement sensor to obtain the contour and cross-sectional shape of the foot. ing.

(Problems to be Solved by the Invention) However, the known foot shape measuring device measures the left and right feet individually on one side, and uses one displacement sensor to change its position and direction. Since it is a measurement, it takes a long time to complete the measurement of both the left and right feet, and since the footrest is merely a foot rest and does not have a pressure distribution sensor, I could not know the ground contact shape. Moreover, while the contour of the foot changes due to the way the weight is applied, the known device lacks means for confirming the position of the center of gravity of the human body, resulting in poor reproducibility and measurement. There was a problem that the error was large.

This invention can measure the shape of both the left and right feet at the same time to shorten the required time, and can simultaneously detect the ground contact surface shape (body pressure distribution) of the sole of the foot at the same time as the measurement by the displacement sensor. It is an object of the present invention to provide a foot measuring device capable of reducing the measurement error by performing the above measurement while keeping the center of gravity of a person within a desired range.

(Means for Solving the Problem) The foot-type measuring device of the present invention is provided with left and right footrests above the bottom plate of the main body case via the left and right footrest frames, and from the bottom plate to the footrest. 3 for detecting the position of the center of gravity when the feet are placed on the left and right footrests between the members of
Place and interpose more than one load cell in a polygonal shape, and install a pressure distribution sensor on the upper surface of the footrest to detect the ground contact surface shape of the sole of the foot, and set the width between the bottom plate and the footrest frame. Direction-long front slide plate and rear slide plate are slidably supported back and forth, respectively, and two laser systems for detecting the left side of the left foot that face each other with the left footrest stand sandwiched on the rear slide plate. A displacement sensor and two laser displacement sensors for detecting the right side of the foot which face each other across the right footrest are provided so that they can be moved up and down, and the left footrest is straddled in the width direction on the front sliding plate. A dome-shaped guide rail and a right dome-shaped guide rail that straddles the right footrest in the width direction are provided, and the left dome-shaped guide rail and the right-side dome-shaped guide rail are respectively laser-displaced for the left dome. Sensor and a laser displacement sensor for the right dome are slidably mounted, and when the subject stands on the left and right footrests, the subject's position relative to the center of gravity of the polygon connecting the three or more load cells is measured. A center of gravity measuring device for calculating and displaying the deviation of the center of gravity on the basis of the outputs of the above-mentioned three or more load cells is provided, and the contour of the foot by the laser displacement sensor for side face detection described above while keeping the deviation within a predetermined range. , Foot length, foot width, 1st finger height, 5th finger height, instep height measurement, measurement of foot circumference with laser displacement sensor for dome and body pressure distribution measurement of sole with pressure distribution sensor It is characterized by having done.

The position where the load cell is interposed may be, for example, between the bottom plate and the lower end of the footrest frame or between the upper surface of the footrest frame and the lower surface of the footrest base. Further, the pressure distribution sensor used in the present invention may detect and display only a portion having a certain pressure or more in a large number of minute portions, and display the magnitude of the pressure of the minute portion in several stages. It may be a capacitance type or a current type. Further, the left and right dome-shaped guide rails can be formed to be rotatable around the vertical axis.

(Function) When the person to be measured stands with the left foot on the left footrest and the right foot on the right footrest, the center of gravity moves according to the inclination of the body of the person to be measured, and the position of the center of gravity is the center of gravity. Since it is displayed on the display unit of the measuring instrument, the person to be measured can keep his or her center of gravity within a predetermined range by controlling his / her posture while observing the display of the center of gravity measuring instrument during the measurement of the foot shape.

As described above, when the person to be measured stands on the left and right footrests, the pressure distribution sensor installed on the left and right footrests detects the magnitude of the ground contact pressure for each of the minute parts of the sole of the foot. A portion of the detected value exceeding the set value is output as a contour line, a color distribution, or another figure (see the shaded portion S in FIG. 8) via the arithmetic unit and the plotter that are connected in advance to the pressure sensor.

Further, when the laser type displacement sensor for detecting the side surface on the rear sliding plate is operated, the distance from the displacement sensor to the surface of the foot is measured. Then, by moving the rear sliding plate forward at a predetermined speed and reciprocating the displacement sensor up and down, the outer side surface and the inner side surface of the foot are scanned. For example, the rear sliding plate is moved forward from the rear part (the heel of the foot) at a predetermined speed, and two sets of left and right side surface laser detection displacement sensors on the rear sliding plate are moved up and down within a predetermined range at a constant distance. It is traversed (refraction line V in FIG. 7) and the horizontal distance to the foot is measured. Then, only the shortest distance detected during the ascending stroke and the shortest distance detected during the descending stroke of the side surface detection laser displacement sensor are stored by setting, respectively, and by using this and the moving distance of the rear sliding plate, , The outer contour A of the foot (see FIG. 8) is determined. That is, the forward stroke of the rear sliding plate measures the distance between the displacement sensor and the outer surface of the left foot by the outer one of the laser displacement sensor for detecting the side surface of the left foot, and from the result, the outer contour with respect to the center line of the foot is determined. Sought,
The distance from the inner surface of the left foot is measured by the inner sensor opposed to the outer displacement sensor, the inner contour is obtained from the result, and the outer contour of the entire left foot is obtained by matching the outer contour and the inner contour. . Similarly, the outer contour A of the right foot can be obtained by the pair of right side laser detecting displacement sensors. Then, the left and right outer contours are output as a graphic as required. Further, from the data of the outer contour A, the foot length l, the foot width b, etc. are calculated.
It is empirical that the amount of protrusion to the side of the foot is maximum slightly above the ground contact surface, and the height of the part where the maximum protrusion is present is higher on the heel side than on the toe side. The lateral traverse width of the laser displacement sensor for side surface detection is changed in two or more steps so that it is larger on the rear side (heel side) and smaller on the front side (toe side), and measurement is required. The time can be shortened.

In the backward stroke of the rear sliding plate, the traverse motion of the displacement sensor is omitted and the rearward slide plate is moved backward at a high speed, and the traverse in the vertical direction or the front-back direction (see the refraction line H in FIG. 7) is performed only within the range set by experience. Then, the first finger height i, the fifth finger height j, and the instep height h (see FIG. 10) can be measured based on the point where the foot is no longer detected.
Also, of the ballpoint B ₁ inside and outside of the outer profile A obtained in forward stroke, B ₂ (maximum projection point in the width direction), the upper and lower traverse inside the ball point B _1, said inner The height of the ball point can be detected. Furthermore, the tip positions of the outer fruit end C (see FIG. 10) and the inner fruit end D (see FIG. 9) can be detected, and their heights c and d can be measured. In the forward stroke of the rear sliding plate, all the measurement values obtained by the scanning of the side surface detection laser type displacement sensor can be stored, and in this case, the necessary data can be retrieved from the stored data. To obtain the above-mentioned outer contour A, output this as a figure, and further, foot length 1, foot width b, first finger height i, fifth
The finger height j, the instep height h, etc. can be obtained.

The front slide plate standing by at the toe side is retracted to the position of the inner ball point B ₁ obtained by the measurement of the outer contour A, and then this front slide plate is moved from the inner ball point B ₁ to the outer ball point B _1. until B ₂ is retracted by a constant pitch, that each retracting the laser displacement sensor dome on the left and right dome-shaped guide rail is fixed angular movement by measuring the radial distance to the foot, is stored, said from this data The cross-sectional shape on the line connecting the inner ball point B ₁ and the outer ball point B _{2 of} is calculated, and from this, the foot circumference m (see FIG. 8, ball girth) is calculated. Then, when the dome-shaped guide rail is formed so as to be horizontally rotatable around the vertical line,
Rotate this dome-shaped guide rail to position it on the straight line connecting the inner and outer ball points B ₁ and B ₂ , and slide the left and right dome laser displacement sensors along the left and right dome-shaped guide rails. Then, the radial distance to the foot is measured for each movement of the fixed angle, and the cross-sectional shape on the line connecting the ball points B ₁ and B ₂ is known. From this, the foot circumference m (see FIG. 7, ball girth) Is calculated. In addition,
A dome-shaped guide rail is formed by a semi-circular portion and a short vertical linear portion that follows it depending on the thickness of the foot, and the above dome laser displacement sensor continuously connects the linear portion and the semi-circular portion. It is possible to improve the measurement accuracy by sliding the dome, and the above-mentioned laser displacement sensor for a dome measures only the upper part of the ball points B ₁ and B ₂ , and the displacement sensor for the side surface detection is used. The foot circumference m can be obtained by adding the heights of the ball points B ₁ and B ₂ and the foot width b measured by. In addition, by stopping the dome-shaped guide rail above the instep point E and fixing its direction in the width direction, and driving the dome laser displacement sensor, the circumferential length passing through the instep point E is determined. Instep girth n of is calculated.

In addition, the above-mentioned sole contact surface S, outer contour A, foot length 1, foot width b, instep height h, foot circumference (ball girth) m, instep girth n, first finger height i, fifth finger A part of the height j, for example, the measurement of the ball height or the inner fruit end height d is omitted,
On the other hand, inner length, outer length, inner half leg width b ₁ , outer half leg width
b _2, a heel width b _3, etc. can be measured with a laser displacement sensor detection side, also measures the waist girth t a laser displacement sensor dome in the middle of the measurement position of the foot circumference m and instep girth n can do. In addition, the dome-shaped guide rail can be adjusted in height and can be tilted to the left and right. For example, when measuring an instep girth, the dome-shaped guide rail can be slightly tilted to the inside of the foot or its height can be changed. Therefore, the measurement accuracy can be improved.

(Example) In FIG. 1, 1 is a measurement unit, 2 is a control unit, 3 is a center of gravity display unit, 4 is a keyboard, 5 is a display with a touch panel, 6 is a plotter, 7 is a printer, and the left and right sides of the measurement unit 1 are shown. When the person to be measured stands on the foot rests 18 and 18 with his left and right feet, the position of the center of gravity is displayed on the center of gravity display unit 3 by, for example, a bar graph or the like, and the touch panel of the above display is displayed according to the instruction of the display 5. By operating the pressure distribution sensor 19 of the footrests 18, 18 of the measuring unit 1.
(See FIG. 2) is activated to detect the ground contact portion on the sole of the foot, the shape of the ground contact portion is output from the plotter 6, and the measuring unit 1
The laser displacement sensors 36 and 48 of FIG. 2 operate to measure the dimensions of each part of the foot, and the computer of the control unit 2 calculates them.
The outer contour A of the foot is output from the plotter 6, and each measured value is output from the printer 7.

2 and 3, the main body case 10 of the measuring unit 1
On the bottom plate 11 of the base plate via the load cells 12a, 12b, 1c at the left and right of the rear part (downward in FIG. 2) and the center of the front part in total.
13 are placed and these three load cells 12a, 12b, 12c
When the load applied to each of Wa, Wb, and Wc is set to the average value (Wa +
Wb + Wc) / 3 = Wm is calculated, and further the differences Wa-Wm, Wb-Wm, Wc-Wm between the individual load and the average value are calculated, and the three radial scales 3a, 3b on the gravity center display unit 3 are calculated. 3c above difference
Wa-Wm, Wb-Wm, Wc-Wm are displayed as the distance from the center. If load cells are installed at a total of four locations on the toe side and heel side of the left and right foot rests 18 and 18, respectively, the load on the left heel is Wa and the load on the right heel is upper. In Wb of the formula, and the average value of the load on the left and right toes is
Substituted for Wc respectively. In this case, compared with the case where the load cell is arranged on the bottom plate 11 of the main body case 10, the movement of the center of gravity due to the movement of the displacement sensor is not affected.

Guide plates 14, 14 in the front-rear direction are erected in parallel on the left and right of the upper surface of the base plate 13, and a horizontal guide groove 14 provided on the opposing surface thereof.
A front sliding plate 15 and a rear sliding plate 16 are slidably supported on a and 14a (see FIG. 4). The left and right footrest frames 17, 17 are fixed so as to straddle the front sliding plate 15 and the rear sliding plate 16 in the front-rear direction. The footrest frame 17 is formed in a gate shape by a horizontal portion 17a in the front-rear direction and leg portions 17b, 17b at both front and rear ends thereof, and is fixed on the base plate 13 by the leg portions 17b. Then, the horizontal portion 17
A footrest 18 is fixed on a, and a pressure distribution sensor 19 is provided on the upper surface of the footrest 18. This pressure distribution sensor 19
Is a pressure-sensitive rubber sheet whose conductivity changes depending on pressure.One conductor is arranged in the front-back direction and one conductor is arranged in the width direction on the opposite side at intervals of 5 mm. The foot stand 18
When the person to be measured stands on the ground, a part of the ground contact surface of the sole with a predetermined pressure or more is detected, and this ground contact surface shape S (see FIG. 8) is detected.
Is drawn by the plotter 6 (see FIG. 1).

As shown in FIGS. 2 and 3, a first horizontal shaft 21, a second horizontal shaft 22, a third horizontal shaft 23, a fourth horizontal shaft 21 are provided between the rear portions of the front portion of the base plate 13.
The horizontal shafts 24 are respectively supported at positions lower than the guide grooves 14a. The first horizontal shaft 21 is driven by a first stepping motor 25 located at the front left end of the base plate 13 via a transmission means 25a, and the left and right gears 21 fixed to the first horizontal shaft 21 are driven.
a, 21a and left and right gears 23a, 2 fixed to the third horizontal shaft 23
The first toothed belt 26 is wound around 3a, the first toothed belt 26 is connected to the front sliding plate 15, and the front sliding plate 15 moves back and forth by the rotation of the first stepping motor 25. To do. On the other hand, the second horizontal shaft 22 is driven by the second stepping motor 27 located at the front right end of the base plate 13 via the transmission means 27a, and the left and right gears 22 fixed to the second horizontal shaft 22 are provided.
a, 22a and left and right gears 24a, 2 fixed to the fourth horizontal shaft 24
The second toothed belt 28 is wound around 4a, the second toothed belt 28 is connected to the rear sliding plate 16, and the rear sliding plate 16 moves back and forth by the rotation of the second stepping motor 27.

A fifth horizontal shaft 31 is supported in the width direction at the center of the upper surface of the rear sliding plate 16, and the fifth horizontal shaft 31 is driven by a third stepping motor 32 on the rear sliding plate 16 via a transmission means 32a. It An elevating plate 33 parallel to the rear sliding plate 16 is provided above the fifth horizontal shaft 31 so as to be movable up and down, and a downward rack 34 projecting from the lower surface of the elevating plate 33 (see FIG. 3, (See FIG. 4), the pinions fixed to both ends of the fifth horizontal shaft 31.
35 meshes with each other, and the lifting plate 33 moves up and down by the rotation of the third stepping motor 32. Then, two laser displacement sensors 36 for detecting the side surface of the left foot are provided on the left half of the lifting plate 33.
36, and two laser displacement sensors 36, 36 for detecting the right side of the foot are fixed to the right half so as to face each other.

The rear sliding plate 16 is driven by a second stepping motor 27 that rotates upon receiving an output pulse of the control unit 2 to move forward from a standby position shown in the drawing, and while the moving plate 33 moves forward a fixed distance, the lifting plate 33 moves to the third position. Driven by the stepping motor 32 to move up and down 1
Make a round trip. That is, the rear sliding plate 16 advances by 1 mm, then the elevating plate 33 rises within a predetermined height range, and after this rising, the rear sliding plate advances by 1 mm, and then the elevating plate 33 returns to its original height. Then, the laser displacement sensor 36 for side surface detection scans the inner and outer side surfaces of the foot along the refraction line V in FIG. The lifting or lowering stroke of the lifting plate 33 is set to an arbitrary size of 80 mm or less. Then, the four side surface detection laser displacement sensors 36 on the lift plate 33 emit laser light each time the lift plate 33 or the rear sliding plate 16 moves by 1 mm, and measure the distance to the foot. , The shortest distance in the ascending stroke and the descending stroke is stored in the control unit 2, and the outer contour A of the foot is calculated from the shortest distance and the movement amount of the rear sliding plate 16.
Is calculated, and the foot length l, foot width b, etc. are calculated, and obtained as the output of the plotter 6 or the printer 7 as required.

When the rear sliding plate 16 is located at the front, the one finger height i and the fifth finger height j are measured. That is, when measuring the height i of the first finger, the rear sliding plate 16 is moved forward and backward in the range where the first finger is present, and at the end of the forward stroke and the backward stroke, the side face detection laser displacement sensor 36, 36
When the side sensor 36 scans the first finger by raising the side sensor 36 in a zigzag shape along the refraction line H of FIG. 7 when the inner displacement sensor 36 no longer detects the first finger. The first finger height i is obtained by subtracting 1 mm from the height of. Also,
When the fifth finger height j is detected, the outer displacement sensor 36 similarly scans the fifth finger to detect the fifth finger height j. The required time can be shortened by performing the above-mentioned scanning only in a range above a certain height, for example, in a range of a height of 5 mm or more.

On the other hand, the left and right dome-shaped guide rails 41,
41 is provided. This dome-shaped guide rail 41 is
As shown in the figure, it is composed of an upper semi-circular portion 41a and linear leg portions 41b and 41b continuing to the lower portion, and the central portion of a horizontal base portion 41c connecting the leg portions 41b and 41b slides forward. It is connected to the plate 15 by a vertical shaft 42 so as to be horizontally rotatable. And
A rack 43 extending forward is swingably connected to one end of the horizontal base portion 41c, and a pinion fixed to the shaft of a fourth stepping motor 44 on the front sliding plate 15 is connected to the rack 43.
44a meshes with each other, and the rotation of the fourth stepping motor 44 causes the dome-shaped guide rail 41 to rotate with respect to the vertical shaft 42, so that the inclination angle of the horizontal base 41c with respect to the axial direction can be adjusted.

The semi-circular portion 41a and the leg portion 4 of the dome-shaped guide rail 41 described above.
The inverted U-shaped part consisting of 1b is made of two same-shaped plates in the front and rear, and a winding transmission body (not shown) such as a toothed belt or a chain arranged between them is a semicircle of the guide rail 41. It is connected to a sliding block 47 slidable with respect to the portion 41a and the leg portion 41b, and a dome laser displacement sensor 48 is attached to the sliding block 47, and on the lower side portion 41c of the dome-shaped guide rail 41. It is driven by the fixed fifth stepping motor 49 via the transmission means 49a.

The front sliding plate 15 is driven by the first stepping motor 25 to move forward from the standby position in FIG. 2 to the set position. For example, when measuring the instep girth n, the dome-shaped guide rail 41 is set to the instep girth n depending on the setting.
The front slide plate 15 is moved until it reaches the measurement position of, and the fourth stepping motor 49 is driven to drive the dome-shaped guide rail 41.
The horizontal base portion 41c of the above is aligned with the width direction of the foot on the footrest 18 (the direction perpendicular to the reference line N in FIG. 8), and then the fifth stepping motor 49 is driven to perform laser displacement for the dome. The sensor 48 is slid along the dome-shaped guide rail 41, and the distance to the foot is measured every time the sensor 48 moves a fixed angle, for example, 5 degrees, and the instep girth is calculated from this. When measuring the ball girth m, the dome-shaped guide rail 41 is tilted to be positioned on the line connecting the ball points B ₁ and B _2, and then the dome laser displacement sensor 48 is driven. In this embodiment, since the linear leg portion 41b is provided below the semicircular portion 41a of the dome-shaped guide rail 41, when the inner side portion and the outer side portion of the foot are scanned by the displacement sensor 48, The displacement sensor 48 moves vertically. Therefore, the measurement accuracy is improved as compared with the case where only the semicircular portion 41b is provided without the leg portion 41b.

(Effects of the Invention) As described above, according to the present invention, the left and right footrests are provided on the base plate so that both the left and right feet can be placed at the same time, and the load cell is formed in a polygonal shape below the footrest. The center of gravity measuring device that indicates the position of the center of gravity of the person to be measured based on the output of this load cell is provided.The pressure distribution sensors are provided on the left and right footrests, and the front and rear sliding plates are placed on the base plate. Since various types of displacement sensors are provided, the person to be monitored monitors the center of gravity measuring device to keep the center of gravity position within a predetermined range, while maintaining the center of gravity position within the specified range. Other foot molds can be measured, and therefore errors due to the deviation of the center of gravity can be prevented and the measurement accuracy can be improved. Further, the pressure distribution sensor and the displacement sensor can be simultaneously measured, and the displacement sensor can be used for the side surfaces of the left and right feet.
Since there are 6 pieces for the dome of the left and right feet, a total of 6 pieces can be measured at the same time, the time required for the measurement is shortened. The measurement accuracy can be further improved.

[Brief description of drawings]

FIG. 1 is an overall perspective view of an embodiment of the present invention, FIG. 2 is an internal plan view of the measuring unit 1, FIG. 3 is a sectional view taken along line III-III of FIG. 2, and FIG. 4 is of FIG. Sectional view taken along the line IV-IV, FIG. 5 is a front view of the dome-shaped guide rail portion, FIG. 6 is a plan view of FIG. 5, and FIG. 7 is an explanatory view of a scanning path by a laser displacement sensor for side surface detection. FIG. 8 is a rear view of the foot, FIG. 9 is an inner side view of the foot, and FIG. 10 is an outer side view of the foot. 1: Measuring unit, 2: Control unit, 3: Display of gravity center measuring device, 4: Keyboard, 5: Display, 6: Plotter, 7: Printer, 10:
Body case, 11: bottom plate, 12a, 12b, 12c: load cell, 13:
Base plate, 15: Front sliding plate, 16: Rear sliding plate, 17: Footrest frame, 18: Footrest base, 19: Pressure distribution sensor, 33: Lift plate, 36:
Laser displacement sensor for side detection, 41: Dome type guide rail, 48: Laser displacement sensor for dome.

Claims (1)

[Claims] 1. A left and right footrests are provided above a bottom plate of a main body case via left and right footrest frames, and a foot is placed on the left and right footrests between arbitrary members from the bottom plate to the footrests. Three or more load cells for detecting the position of the center of gravity when placed are arranged in a polygon and intervened, and a pressure distribution sensor for detecting the ground contact surface shape of the sole is installed on the upper surface of the footrest. , A front sliding plate and a rear sliding plate, which are long in the width direction, are slidably supported between the bottom plate and the footrest frame, respectively, and the left footrest is sandwiched on the rear sliding plate. The two laser displacement sensors for detecting the left side of the foot and the two laser displacement sensors for detecting the side of the right side that face each other with the right footrest stand sandwiched therebetween are provided so as to be able to move up and down. Left side across the width of the left foot stand on the board A dome-shaped guide rail and a right dome-shaped guide rail that straddles the right footrest in the width direction are provided, and the left dome-shaped guide rail and the right dome-shaped guide rail described above are respectively provided with a laser displacement sensor for the left dome and a laser for the right dome. The displacement sensor is slidably mounted, and when the subject stands on the left and right footrests, the deviation of the center of gravity of the subject with respect to the position of the center of gravity of the polygon connecting the three or more load cells is described above. A center of gravity measuring device that calculates and displays based on the output of three or more load cells is provided, and the contour of the foot, foot length, and foot width by the above-mentioned laser detection sensor for side face detection while keeping the above deviation within a predetermined range. , 1st finger height, 5th finger height, instep height measurement, measurement of foot circumference by laser displacement sensor for dome, and body pressure of sole by pressure distribution sensor Footprints measuring device being characterized in that to allow the fabric measurement.