JPH02182202A - Foot-form measuring device - Google Patents

Abstract

PURPOSE:To improve accuracy of the measurement of a foot-form by providing a bed plate on at least three load cells and fixing left and right feet placing beds on said bed plate while providing a center-of-gravity indicator, pressure distribution sensor and displacement sensor. CONSTITUTION:A bed plate 13 is provided on load cells 12a, 12b, 12c disposed polygonally. Left and right feet are simultaneously placed on a left and right feet placing bed 18 fixed to the bed plate 13, while a center-of-gravity indicator 3 for indicating the position of center of gravity of a measured person on the basis of outputs of the load cells is provided. A pressure distribution sensor 19 is provided on the left and right feet placing bed and various displacement sensors 36, 48, 54 are provided on the bed plate through front and rear slide plates 15, 16. The measured person can monitor said indicator 3 to maintain the position of center of gravity within a predetermined range, while measuring the ground contact shape of the sole by the pressure distribution sensor 19, the outer contour and foot-print of feet by the displacement sensors 36, 48, 54. Thus, errors due to the offset of center of gravity can be prevented to improve accuracy of the measurement.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a foot last measuring device for measuring the last of a human body, and is used to design and manufacture shoes that match the shape of the foot, or to manufacture a large number of shoes that match the shape of the foot. It is found in ready-made shoes and used to modify ready-made shoes.

(Prior art) In order to understand the shape of the foot, in the past, a measurer placed a shoe ivy, foot gauge, scriber, tape measure, hide gauge, etc. directly on the foot to measure the dimensions of each part. Since the foot is soft, the measured value varies depending on the amount of measurement pressure, and measurement requires skill, automatic foot shape measuring instruments have recently been developed to measure the shape of the foot without contact.

For example, one foot of the person to be measured is placed on a footrest fixed in a cantilevered manner, and the displacement sensor is moved in the length direction, width direction, and height direction of this foot, or There is a known device that measures the distance to the foot while rotating the above-mentioned displacement sensor around it, and calculates the contour and cross-sectional shape of the foot based on this measured value and the amount of movement of the displacement sensor. ing.

(Problem to be Solved by the Invention) However, the above-mentioned known foot shape measuring device measures the left and right feet individually, and also measures by changing the position and direction of one displacement sensor. Therefore, it takes a long time to complete the measurement of both the left and right feet, and the footrest is simply a place to rest the foot and is not equipped with a pressure distribution sensor, so the shape of the contact area of the sole of the foot is I couldn't know. What's more, depending on how you put your weight on your feet, some parts of your feet will swell and the contours will change.

Since the above-mentioned known device does not have any means for confirming the position of the center of gravity of the human body, there is a problem in that the measurement error becomes large.

This invention can reduce the time required by measuring the shape of both the left and right feet simultaneously, and can also detect the shape of the ground contact surface (body pressure distribution) of the sole at the same time as the measurement using the displacement sensor. An object of the present invention is to provide a foot shape measuring device that can perform the above measurements while keeping the center of gravity of a person within a desired range, thereby reducing measurement errors.

(Means for Solving the Problems) The foot shape measuring device of the present invention includes a base plate placed on the bottom of the main body case via three or more load cells arranged in a polygonal manner,
A front sliding plate and a rear sliding plate, which are long in the width direction, are supported on this plywood so that they can slide back and forth, and the left and right sides are supported so as to straddle these front sliding plates and rear sliding plates in the front and back direction. A footrest frame is fixed, and a pressure distribution sensor for detecting the shape of the contact surface of the sole is installed on the upper surface of the footrest fixed on the left and right footrest frames respectively, and a pressure distribution sensor is installed on the top of the footrest fixed on the left and right footrest frames, and a pressure distribution sensor is installed on the rear sliding plate. The two laser-type displacement sensors for detecting the side surface of the left foot, which are opposite to each other across the left footrest mentioned above, and the two laser-type displacement sensors for detecting the side surface of the right foot, which are opposite to each other with the right footrest mentioned above, can be raised and lowered. A left dome-shaped guide rail that straddles the left footrest in the width direction and a right dome-shaped guide rail that straddles the right footrest in the radial direction are provided on the front sliding plate - H, respectively, so as to be horizontally rotatable. A laser displacement sensor for the left dome and a laser displacement sensor for the right dome are slidably attached to the left dome-shaped guide rail and the right Be 13-shaped guide rail, respectively, and the dome-shaped A gate-shaped guide rail that straddles the left and right footrests in the width direction is fixed in front or behind the guide rail, and a laser-type displacement sensor for the upper left surface and a laser-type displacement sensor for the upper right surface are mounted on the upper horizontal part of this gate-shaped guide rail. When the subject stands on the left and right footrests, the offset of the subject's center of gravity with respect to the center of gravity of the polygon connecting the three or more load cells is determined by the above 3. A center of gravity indicator is provided that calculates and displays the results based on the outputs of more than one load cell, and while keeping the above deviation within a predetermined range, the displacement sensor measures the footprint of the foot, and the pressure distribution sensor measures the body pressure on the sole of the foot. It is characterized by making it possible to measure distribution.

(Function) When the person being measured stands with his left foot on the left footrest and his right foot on the right footrest, the center of gravity will shift depending on the inclination of the person's body, and the position of the center of gravity will be the center of gravity. Since it is displayed on the display, the person to be measured can control his/her own posture to keep the center of gravity within a predetermined range while looking at the display on the center of gravity display while measuring the last of the foot.

When the person to be measured stands on the left and right footrests as described above, the pressure distribution sensors installed on the left and right footrests detect the magnitude of the ground pressure for each of the many minute parts of the soles of the feet. , the part of the detected value exceeding the set value is plotted by the pressure sensor, and a figure such as a contour line one-color distribution is plotted via the connected arithmetic unit and plotter (see the shaded area S in Figure 8).
is output as

Additionally, when the side detection laser displacement sensor on the rear sliding plate is activated, the rear sliding plate moves forward from the rear (heel side) at a predetermined speed, and the left and right pairs of rear sliding plates move forward at a predetermined speed. A side-detection laser displacement sensor traverses a predetermined range up and down to measure the horizontal distance to the foot. For example, only the shortest distance detected during the upward stroke and the shortest distance detected during the downward stroke of the laser displacement sensor for side surface detection may be stored by setting, and this and the moving distance of the rear sliding plate may be stored. By using the outer contour of the foot A
(See Figure 8) is required. That is, with the forward stroke of the rear sliding plate, the distance between this displacement sensor and the outer surface of the left foot is measured by the outer side of the laser displacement sensor for detecting the side surface of the left foot, and the outer contour is determined from the result. The distance to the inner surface of the left foot is measured by the inner sensor facing the displacement sensor, and the inner contour is determined from the results. By combining the outer and inner contours, the outer contour of the entire left foot is obtained. Similarly, the outer contour A of the right foot is obtained by a set of laser displacement sensors for side surface detection on the right side. Then, the left and right outer contours are output as figures as necessary. Further, foot length, foot width, etc. are calculated from the data on the outer contour.

It should be noted that the amount of protrusion toward the side of the foot is at its maximum slightly above the ground surface, and empirically, the height of the part where the maximum protrusion exists is higher on the heel side than on the toe side. Therefore, the upper and lower 1-rubber widths of the side surface detection sensor type displacement sensor are changed to two or more levels, such that it is larger on the rear side (heel side) and smaller on the front side (toe side). Therefore, the time required for measurement can be shortened.

In the backward stroke of the rear sliding plate, the traverse movement of the displacement sensor is omitted, the displacement sensor is moved backward at high speed, and the vertical traverse is performed only within the range set by experience, thereby increasing the instep height h (see Figure 10). can be measured. Also, among the inner and outer ball points L-B, B2 (maximum protrusion point in the width direction) of the outer contour A obtained by the forward stroke, a vertical traverse is performed at the inner ball points 1 to B□, and the above-mentioned The height of the inner ball point can be detected. Furthermore, the lateral malleolus end C (10th
) and the tip position of the medial malleolus end D (see FIG. 9) can be detected, and the heights c and d thereof can be measured.

Retract the front sliding plate located on the toe side, and rotate the left and right dome-shaped guide rails to align the ball points B□ and B2 on the straight line connecting the inner and outer ball points B□ and B2 obtained by measuring the outer contour A. position, slide the left and right dome laser displacement sensors along the left and right dome-shaped guide rails, measure the radial distance from this displacement sensor to the foot, and measure the distance between the inner ball point B and the outer ball point. Knowing the cross-sectional shape on the line connecting B2, the foot circumference m (see Figure 9, Boergarth) is calculated from this.

In addition, the dome-shaped guide rail is formed by a semicircular part and a short vertical straight part that continues below it according to the thickness of the foot, and the laser displacement sensor for the dome is connected to the above straight part and semicircular part. The measurement accuracy can be improved by continuously sliding the ball points B□ and B2, and the above-mentioned laser displacement sensor for dome measures only the upper part of the ball points B□ and B2, and The foot circumference can be determined by adding the heights of ball points 1 to B1 and B2 measured by the displacement sensor. In addition, by stopping the above-mentioned dome-shaped guide rail on the in-step point E, fixing its direction in the width direction, and driving the dome laser displacement sensor, the circumference passing through the in-step point E can be determined. The instep girth n is calculated.

After the front sliding plate mentioned above reaches the front of the root, the front sliding plate starts moving forward to the original position, and the laser displacement sensors for the left and right upper surfaces are placed horizontally on the gate-shaped guide rail. The vertical distance to the foot is measured, thereby calculating the first toe height i and the fifth toe height j. In this case, the positions and heights of the highest points of the first and fifth fingers are detected by having the displacement sensor scan only a predetermined area on the inside of the toe and a predetermined area on the outside of the toe, which are set based on experience. However, this can shorten the detection time.

In addition, the above-mentioned sole contact surface S, outer contour A, foot length α, foot width b
, instep height h, foot circumference (pole gas) m, instep girth n, first toe height 1, and fifth toe height j. Omitted, and conversely, inner foot length, outer foot length, inner trot width b□, outer shoe width b
2. The heel width b3, etc. can be measured with a laser displacement sensor for side surface detection, and the waste girth t can be measured with a dome laser displacement sensor between the measurement positions of foot circumference m and instep gas n. Can be done. In addition, the dome-shaped guide rail is formed to be adjustable in height and tiltable to the left and right. For example, when measuring the instep girth, the dome-shaped guide rail can be tilted slightly toward the inside of the foot or the height can be changed. Therefore, 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, and 7 is a printer, which are located on the left and right sides of the measurement unit 1. When the person to be measured stands with his left and right feet on the footrest 18.18, the position of his center of gravity is displayed on the center of gravity display section 3 using, for example, a bar graph, and he can operate the touch panel according to the instructions on the display 5. As a result, the pressure distribution sensor 19 of the foot rest 18.
output from each sensor type displacement sensor 3 of the measurement unit 1.
6.48.54 operates to measure the dimensions of each part of the foot,
Calculated by the computer of the control unit 2, the outer contour A of the foot is output from the plotter 6, and each measured value is output from the printer 7.

In FIGS. 2 and 3, the main body case 1 of the measuring section 1
Load cells 12a, 12b, 12 are installed at three locations on the bottom plate 11 of 0 at the left and right of the rear (lower part in Figure 2) and at the center of the front.
The base plate 13 is placed through the load cells 12a, 12b, and 12c, and the load applied to each of these three load cells 12a, 12b, and 12c is
1la, 111b, and 1llc, the average value of the individual loads (sua+Wb
+Wc) /3=Wm is calculated, and the differences Wa-Wm, Wb-Wm, and UCWm between the individual loads and the average value are calculated, respectively, and the three radial scales 3 on the center of gravity display section 3 are calculated.
The above differences UaWm, Wb-un, for a, 3b, 3c,
'Jc-Wm is displayed as the distance from the center.

Guide plates 1 in the rear direction 1) on the left and right sides of the upper surface of the base plate 13
4.14 are erected in parallel, and horizontal guide grooves 14a, 14. A front sliding plate 15 and a rear sliding plate 16 are each slidably supported on a (see FIG. 4). Then, the left and right footrest frames 1 are arranged so as to straddle the front sliding plate 15 and the rear sliding plate 16 in the front-rear direction.
7.17 is fixed. This foot frame 17 includes a horizontal portion 17a in the front and rear direction and leg portions 17b, 17 at both front and rear ends thereof.
b, and is formed into a gate shape, and is fixed onto the base plate 13 by leg portions 17b. Then, the horizontal portion 17a
A footrest 18 is fixed on top, and a pressure distribution sensor 19 is provided on the upper surface of the footrest 18. This pressure distribution sensor 19 has a pressure-sensitive rubber sheet whose conductivity changes depending on the pressure, and has a large number of conductive wires in the front and back direction on one side and a number of conductive wires in the width direction on the other side, arranged at intervals of 5rrtr1, so that the pressure reaches a set value. When the person to be measured stands on the footrest 18, a portion of the contact surface of the sole of one foot with a pressure equal to or higher than a predetermined pressure is detected, and this contact surface shape S( (see FIG. 8) 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 2
3. The fourth horizontal shaft 24 is connected to the guide groove 14-
It is supported at a lower position than a.

The first horizontal shaft 21 is a first horizontal shaft located at the front left end of the base plate 13.
Left and right gears 21a are driven by a stepping motor 25 via a transmission means 25a and fixed to the first horizontal shaft 2.
, 21a and the left and right gears 2 fixed to the third horizontal shaft 23
A first toothed belt 26 is wound around 3a and 23a, and this first toothed belt 26 is connected to the front sliding plate 15,
The rotation of the first stepping motor 25 causes the front sliding plate 15 to move back and forth. On the other hand, the second horizontal axis 22 is
A second stepping motor 27 located at the front right end of the base plate 13 drives the left and right gears 22a, 22a and a fourth
The left and right gears 24a, 24a fixed to the horizontal shaft 24 have second
A toothed belt 28 is wound around, and this second toothed belt 28 is connected to the rear sliding plate 16, and the rotation of the second stepping motor 27 moves the rear sliding plate 16 back and forth.

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 this fifth horizontal shaft 31 is driven by a third stepping motor 32 on the rear sliding plate 16 via a transmission means 32a. be done. Above the fifth horizontal axis 31,
An elevating plate 33 parallel to the rear sliding plate 16 is provided so as to be movable up and down, and a downward rack 34 (see FIGS. 3 and 4) protruding from the left and right sides of the lower surface of the elevating plate 33 is connected to the fifth horizontal axis. 31
Pinions 35 fixed to both ends of the motor engage with each other, and the elevating plate 33 is moved up and down by the rotation of the third stepping motor 32. Two laser-type displacement sensors 36.36 for detecting the side surface of the left foot are mounted on the left half of the elevating plate 33, and two laser-type displacement sensors 36.36 for detecting the side surface of the right foot are mounted on the right half.
36 are fixed in a facing manner.

When the rear sliding plate 16 moves forward from the standby position shown in the figure, the rear sliding plate 16 is moved forward by the second stepping motor 27.
receives the output pulses from the control section 2 and rotates intermittently, moving forward by 1 nMn. However, the elevating plate 33 is
Driven by the stepping motor 32, the rear sliding plate 16 is controlled to move forward at the end of the upward and downward strokes, as it is repeatedly raised or lowered one step at a time.

Note that the lifting or lowering stroke of the elevating plate 33 is 8
It is set to an arbitrary size of 0 mm or less. The four side surface detection laser displacement sensors 36 on the elevating plate 33 emit a laser beam each time the elevating plate 33 or the rear sliding plate 16 moves, measure the distance to the foot, and measure the distance to the foot. The shortest distance in the stroke and the downward stroke is stored in the control unit 2, and the outer contour A of the foot is determined from this shortest distance and the amount of movement of the rear sliding plate 16, and the foot length Q, foot width, etc. are calculated. , can be obtained as an output from a plotter 6 or a printer, if necessary.

On the other hand, left and right dome-shaped guide rails 41, 41 are provided near the rear of the front sliding plate 15. As shown in FIG.
1a, and linear leg parts 41b, 41b continuing below the horizontal base part 4, which connects the leg parts 41b, 41b.
The center portion of 1c is connected to the front sliding plate 15 by a vertical shaft 42 so as to be horizontally rotatable. A rack 43 extending forward is swingably connected to one end of the horizontal base 41c, and a pinion 4 fixed to the shaft of the fourth stepping motor 44 on the front sliding plate 15 is connected to the rack 43.
4a are engaged with each other, and the rotation of the fourth stepping motor 44 rotates the dome-shaped guide rail 41 about the vertical shaft 42, so that the inclination angle of the horizontal base 41c with respect to the width direction can be adjusted.

The inverted U-shaped part consisting of the semicircular part 41a and the leg part 41b of the dome-shaped guide rail 41 is made of two plates of the same shape at the front and back, and a winding power transmission body such as a toothed belt or chain is placed between them. (not shown) is connected to a sliding block 47 that is slidable on the semicircular portion 41a and leg portion 41b of the guide rail 41, and a dome laser displacement sensor 48 is connected to the sliding block 47. It is mounted and driven by a fifth stepping motor 49 fixed on the lower side 4-1c of the dome-shaped guide rail 41 through a transmission means 4.9a.

A gate-shaped guide rail 5 is located near the front of the front sliding plate 15 mentioned above.
1 is provided. As shown in FIG. 7, this gate-shaped guide rail 51 consists of a water portion 51a that is long in the width direction and leg portions 51b, 51b at both ends, and a horizontal base portion 51c that connects the lower ends of the leg portions 51b, 51b. It is fixed to the front sliding plate 15 via. The above-mentioned gate-shaped guide rail 51 is made of two plates of the same shape, front and back, and a transmission body (not shown) such as a toothed belt or chain arranged between the two plates is used for the left and right upper surfaces. Laser displacement sensor 54
．． 54 are respectively attached to the horizontal portion 51a via sliding blocks 55 and 55 which are slidable, and the transmission means 56 is driven by a sixth stepping motor 56 fixed on the horizontal base portion 51c of the gate-shaped guide rail 51. a.

The front sliding plate 15 is driven by the first stepping motor 25 and moves forward from the standby position shown in FIG. 2 to the set position. For example, when measuring the instep girth n, the front sliding plate 15 is moved until the dome-shaped guide rail 41 reaches the measuring position of the instep girth n, depending on the settings.
The fourth stepping motor 49 is driven to move the horizontal base 4.1c of the dome-shaped guide rail 41 in the direction of the footrest 18-.
1: align with the width direction of the foot (perpendicular to the reference line N in FIG. 8), and then drive the fifth stepping motor 49 to move the dome laser displacement sensor 48 to the dome-shaped guide rail 41. The distance to the foot is measured by sliding the foot along the foot at a pitch of 1 mm, and the instep girth is calculated from this. Note that when the foot is placed on the footrest 18 and the reference line N of the foot coincides with the front-rear direction of the footrest 18, the measurement is performed with the horizontal base 41c of the guide rail 41 facing in the width direction. . Also, when measuring Boergarth m,
By tilting the dome-shaped guide rail 41, the ball point B1. Then, the dome laser displacement sensor 48 is driven. In this embodiment, the straight leg parts 4, 1b are provided below the semicircular part 41a of the dome-shaped guide rail 4, so the inner and outer parts of the feet are scanned by the displacement sensor 48. When this happens, this displacement sensor 48 moves vertically. Therefore, the accuracy is improved compared to the case where there is no leg portion 4.1b and only the semicircular portion 41a is provided.

In addition, when measuring the first finger height j, the front sliding plate 15 is moved back by L nin above the first finger, and each time the front sliding plate 15 is moved back one step, the left and right upper surface laser displacement sensors 54 are 6th stepping motor 56 within a predetermined area on both sides of one finger.
It moves alternately to the left and right by the drive of
The vertical distance to the finger is measured, and the first finger height 1 and its position are calculated from the result. In addition, when measuring the fifth finger height J, similarly to the above, measure the vertical distance to the fifth finger in a predetermined area above the fifth finger, and based on the result, determine the fifth finger height J and its position. Calculate.

(Effects of the Invention) As described above, this invention provides a base plate on three or more load cells arranged in a polygonal arrangement, fixes the left and right footrests to this base plate, and places both the left and right feet at the same time. In addition, a center of gravity indicator is provided to indicate the position of the center of gravity of the subject based on the output of the load cell, and pressure distribution sensors are provided on the left and right footrests, and front and rear sliders are installed on the base plate. Since various displacement sensors are installed through the moving plate, the person being measured monitors the center of gravity indicator, and while maintaining the center of gravity within a predetermined range, the pressure distribution sensor measures the shape and displacement of the ground surface of the sole of the foot. The outer contour and other foot shapes can be measured by the sensor, and therefore errors caused by the center of gravity being shifted to one side can be prevented and measurement accuracy can be improved. In addition, measurements using pressure distribution sensors and displacement sensors can be performed at the same time, and there are four displacement sensors for the sides of the left and right feet, two for the domes of the left and right feet, and two for the upper surfaces of the left and right feet. Since there are two in total, eight in total, more parts can be measured at the same time, which reduces the time required for measurement, and further improves the accuracy of foot last measurement by selecting a large number of measurement points if desired. .

[Brief explanation of the drawing]

1 is an overall perspective view of an embodiment of the present invention, FIG. 2 is an internal plan view of the measurement unit 1, FIG. 3 is a sectional view taken along the line m-III in FIG. 2, and FIG. 5 is a front view of the dome-shaped guide rail section, and 6 is a front view of the dome-shaped guide rail section.
7 is a front view of the gate-shaped guide rail section, FIG. 8 is a sole view of the foot, FIG. 9 is an inside view of the foot, and FIG. 10 is an outside view of the foot. 1: Measuring section, 2: Control section, 3: Center of gravity display section, 4: Keyboard, 5: Display, 6: Plotter, 7: Printer, 10: Main body case, 11: Bottom plate, 1, 2 a, 1.2
b, 12c: Load cell, 13: Base plate, 15: Front sliding plate, 16: Rear sliding plate, 17: Foot frame, 18:
Footrest, 19: Pressure distribution sensor, 33: Elevating plate, 36
: Laser type displacement sensor for side detection, 41: Dome-shaped guide rail, 48: Laser type displacement sensor for tome, 5
1: Portal guide rail, 54: Laser displacement sensor for top surface. Patent applicant Toyogo 11 Industries Co., Ltd. Agent Patent attorney Yoshi 1) Ryo Tsukasa

Claims (1)

[Scope of Claims] [1] A base plate is placed on the bottom plate of the main body case via three or more load cells arranged in a polygonal manner, and a front sliding plate and a rear sliding plate that are long in the width direction are mounted on the base plate. The sliding plates are each supported so as to be slidable back and forth, and the left and right footrest frames are fixed so as to straddle these front and rear sliding plates in the front and back direction, and the left and right footrest frames are supported on the left and right footrest frames. A pressure distribution sensor for detecting the shape of the contact surface of the soles of the feet is installed on the top surface of each fixed footrest, and two left feet facing each other with the left footrest placed on the rear sliding plate are placed on the rear sliding plate. A laser-type displacement sensor for detecting the side surface and two laser-type displacement sensors for detecting the side surface of the right foot facing each other across the above-mentioned right footrest are provided so as to be movable up and down, and a left footrest is mounted on the above-mentioned front sliding plate. A left dome-shaped guide rail that straddles the width direction and a right dome-shaped guide rail that straddles the right footrest in the width direction are provided so that they can rotate freely horizontally, and a laser for the left dome is attached to the left dome-shaped guide rail and right dome-shaped guide rail, respectively. A type displacement sensor and a laser type displacement sensor for the right dome are slidably mounted, and a gate-shaped guide is mounted on the front sliding plate to cross the left and right footrests in the width direction in front or behind the dome-shaped guide rail. fix the rail,
A laser-type displacement sensor for the left upper surface and a laser-type displacement sensor for the right upper surface are each slidably attached to the upper horizontal part of this gate-shaped guide rail. A center of gravity indicator is provided that calculates and displays the deviation of the center of gravity of the subject with respect to the center of gravity position of a polygon connecting three or more load cells based on the outputs of the three or more load cells, and the deviation is determined by a predetermined value. A foot print measuring device characterized in that it is possible to measure the foot print using the displacement sensor described above and to measure the body pressure distribution of the sole using the pressure distribution sensor while maintaining the foot print within the range of .