JP2550458B2 - Height measuring device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a height measuring device for measuring by contacting a cursor with a crown.

[0002]

2. Description of the Related Art An automatic height meter for measuring height by bringing a cursor into contact with the top of the head is provided with stop detecting means for detecting contact with the top of the head on the lower surface of the cursor. In some cases, the descent until contact with the head and the ascent (return) to the zero point position are repeated. As a means for detecting the stop of the cursor, a pressure sensor (JP-B-53-2583) is used.
No.), an optical sensor, a limit switch, and the like, and the stop position detecting means detects the end point of the change of the cursor with respect to the reference position to measure the height.

[0003]

However, the reference point (zero point) of the cursor is set to 2.2 m or more in accordance with the maximum height measurement, and when measuring a small child, the reference point (zero point) There is a drawback that the distance to the top of the head is long and it takes too long to stop the cursor and return to the reference position. Particularly in schools, hospitals, fitness clubs, and the like that measure a large number of people, it is desired to perform the measurement work efficiently and quickly, but there has been a problem that the number of measurements is large and the progress is difficult.

This drawback can be avoided by increasing the raising / lowering speed of the cursor. However, since the cursor vigorously hits the crown, not only does the person to be measured feel uncomfortable, but the head moves due to the pressure contact. It is easy to cause a measurement point error,
It cannot be adopted at all. The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a height measuring device that can quickly perform head contact and return of a cursor without causing discomfort to the person to be measured. .

[0005]

In order to achieve the above-mentioned object, in a height measuring device according to the present invention, a base on which a person to be measured is placed, a pillar standing upright from the base, and the pillar A cursor that goes up and down along the line, touches the top of the head and stops,
A moving means for moving the cursor along a support column, a position sensor for detecting a reference position of the cursor and a stop position on the top of the head, and an arithmetic processing unit for calculating a height from an output signal of the position sensor are provided. A height measuring device, comprising a distance sensor for detecting that the cursor approaches the top of the head, and a control means for controlling driving of the cursor moving means from an output signal from the distance sensor,
When the cursor descends, the cursor is moved quickly when the distance from the cursor to the top of the head is more than a predetermined distance, and slow when the distance is less than the predetermined distance. According to claim 2, in the height measuring device according to claim 1,
An ultrasonic sensor is used as the distance sensor and the position sensor is also used.

According to a third aspect of the present invention, in the height measuring apparatus according to the first aspect, the support column is a fixed support column fixed to a base,
The fixed column is composed of a movable column that moves in and out of the fixed column.

[0007]

[Operation] When the cursor descends, the arithmetic processing unit obtains the distance from the crown to the cursor based on the signal from the distance sensor provided on the cursor, and this distance information is preset.
When larger than the reference value which is, Rukoto move faster cursor the arithmetic processing unit is a <br/> cursor moving means
Reduces the time it takes for the cursor to descend to the top of the cursor.
When the value is smaller than the value , the arithmetic processing unit uses the cursor moving means to move the cursor slowly, and the cursor is measured.
Decelerate to the top of the fixed person.

[0008]

Embodiments of the present invention will now be described with reference to the drawings. 1 to 8 show a height and weight measuring apparatus which is an embodiment of the present invention, and FIG. 1 is an overall perspective view of the apparatus, and FIG.
3 is a diagram for explaining the guide structure of the electric cord of the same apparatus, FIG.
2 is an enlarged view of a main part around the pulley shown in FIG. 2, FIG. 4 is a partially enlarged view of FIG. 2, and FIG. 5 is a partially enlarged view of FIG. 6 is a sectional view taken along line VI-VI shown in FIG. 1, FIG. 7 is a sectional view taken along line VII-VII shown in FIG. 5, and FIG. 8 is a sectional view taken along line VIII-VIII shown in FIG. .

In FIG. 1, reference numeral 10 is a base on which a load cell, which is a load detecting means, is accommodated and on which a person to be measured can ride, and which is a long column 20 from the base 10.
And the cursor 30 attached to the column 20 can be moved up and down along the column 20. Figures 4 and 5
As shown in (1), on the lower surface of the cursor 30, there is provided an ultrasonic sensor unit 32 which is composed of an ultrasonic oscillator 32a and a receiver 32b, and is a detecting means for detecting the top position of the subject. The ultrasonic wave emitted from the ultrasonic oscillator 32a is reflected at the top of the subject and received by the receiver 32b. By measuring the time from the oscillation to the reception, the distance to the top of the cursor 30 is reduced. Is detected. Reference numerals 37 shown in FIGS. 2, 3, 4, 5, 7, and 8 are connected to the ultrasonic sensor unit 32 and
An electric cord led out inside, and the upper part is a pulley 36 described later.
After being wound around the support 20, the support 20
2 (see FIG. 2), and further connected to an electric cord 37a extending outside the support 20 via a connector (not shown). (Not shown). The electric cord 37a is an ordinary cord having a circular cross section whose surface is insulated, but the electric cord 37a has a copper foil pattern, which is an elongated conductive path, formed integrally between the flexible base film and the overlay film. It is composed of a thin and flexible printed board.

In FIGS. 4 and 5, reference numeral 33 is an abutment plate for the crown, which is swingably provided on the lower surface of the cursor 30. When the abutment plate 30 'comes into contact with the crown, it is slightly raised. When the slider 30b intrudes into the photo sensor 30a and the contact of the contact plate 31 with the crown is detected, the detection signal is calculated in the control unit 40 via the electric cords 37 and 37a. Input to a processing unit (not shown).

The support column 20 has a smaller diameter than the lower fixed support column 27 fixed to the base 10, is provided inside the fixed support column 27, and is movable so as to be vertically slidable with respect to the fixed support column 27. The height of the cursor 30 can be adjusted by vertically moving the movable support column 21 with respect to the fixed support column 27 in accordance with the height. That is, when measuring a short child, the movable support 21 is slid into the fixed support 27 so that the cursor 30 approaches the top of the head, and the descending amount of the cursor 30 during measurement is reduced in advance. Thus, the height can be measured efficiently in a short time.

As shown in FIG. 2, an upper roller 22 is provided at the upper end position of the movable column 21, and a lower roller 23 is provided at the lower end position thereof. An endless toothed belt 24 is provided between the rollers 22 and 23. And the driving force of the driving motor M is transmitted to the lower roller 23 via the gear mechanism 25. 2 and 6, reference numeral 25a denotes a speed reducer, and reference numerals 21a and 21b denote brackets for supporting the lower roller 23, the motor M, and the like, which are fixed to the lower end of the movable support 21. The toothed lifting belt 24 has a connecting plate 30c (see FIG. 5).
The cursor 30 is connected via the side plates 31, 31 of the cursor 30 facing the left and right (right and left when the body weight measuring device is viewed from the base side when viewed from the front side) of the movable column 21.
Includes a slide roller 28a supported by a roller shaft 28,
28 b are provided respectively, and these four slide rollers 28 a, 28 b are adapted to roll along vertically extending guide grooves 21 a, 21 a formed on the left and right side surfaces of the movable support column 21. Therefore, the cursor 30 is guided in the moving direction by one of the elevating belts 24, and is moved up and down along the movable support column 21 by the slide roller 28. Reference numeral 29 is a wheel removal prevention roller that prevents the slide roller 28 from falling out of the slide groove 21a.

The toothed lifting belt 24 extends vertically in parallel between the upper and lower rollers 22 and 23, and the belt 2 runs between the belts 24 and 24 which run in opposite directions.
A fixed rack 26 is provided which extends vertically in parallel with 4. In the illustrated example, the fixed rack 26 is formed of a highly rigid belt, and the side plates 31, 31 of the cursor 30 are provided between the fixed rack 26 and one of the toothed lifting belts 24.
Is engaged with the pinion gear 33 pivotally supported by the pinion gear. This pinion gear 33 is provided above the position of the cursor 30. As shown in FIGS. 7 and 8, brackets 39 are provided before and after the pinion gear 33 (front and rear when the height and weight measuring device is viewed from the base side in front). The pinion gear 33 is configured to accurately mesh with the teeth of the fixed rack 26 and the teeth of the elevating belt 24. For this reason, the pinion gear 33 slides, that is, rolls in the traveling direction of the elevating belt while rotating as the one elevating belt 24 travels. 7 and 8, an electric cord winding guide pulley 36 is coaxially integrated with the pinion gear 33, and an electric cord 37 extending from the sensor unit 32 is wound around the pulley 36. The electric cord 37 extending downward and extending downward is fixedly supported by the support member 38 at the lower end of the fixed support column 27 as described above. For this reason, the electric cord 37 between the support member 38 and the cursor 30 is maintained in a constant tension state without loosening. That elevation belt with the upper and lower travel of 24 the pinion gear 33 (pulley 36) is to roll along the fixed rack 26, the lift amount of H ₂ pinion gear 33 of the lift amount H ₁ of the lifting belt 24 (cursor 30) 1 / Since the number is 2, the pulley 36 also moves up and down as the cursor 30 moves up and down, and the electric cord 37 is kept in a constant tension state without slack.

Reference numeral 46 in FIG. 6 is a disk axially mounted on the roller 23 for driving the elevating belt, and slits are formed at equal intervals on the peripheral edge of the disk 46. Photosensor sensing portions 47a and 47b are provided so as to sandwich the slit of the disk 46, and a rotary encoder 45, which is a distance sensor for detecting the amount of rotation of the disk 46, that is, the movement of the cursor 30, is constituted. The output of the rotary encoder 45 is
Is input to an arithmetic processing unit (not shown) in the control unit 40 via an electric cord 37a extending from the control unit 40. The arithmetic processing unit calculates the amount of movement of the cursor from the reference position, and based on this, the height is The calculated value is displayed on the display unit of the control unit 40.

The distance information from the cursor to the crown is sequentially input to the arithmetic processing unit from the ultrasonic sensor unit 32, and the arithmetic processing unit descends the cursor based on the distance information from the cursor to the crown. A reference value (10 cm) for switching the speed is preset and input. That is, when the cursor starts to descend from the reference point position on the column 27 for height measurement, the arithmetic processing unit uses the distance information input from the ultrasonic sensor unit 32 as a reference value (10c).
m), when the distance to the crown is equal to or greater than the reference value (10 cm), a signal for increasing the rotation speed of the drive motor M is output, while the distance to the crown is equal to the reference value (10c).
m) In the following cases, a signal for reducing the rotation speed of the drive motor M is output. Therefore, the cursor 30 rapidly descends to the vicinity of the parietal region, decelerates near the parietal region (at a position of 10 cm from the parietal region), the contact plate 30 'on the lower surface of the cursor slowly contacts the parietal region, and the rotary encoder 45, which is a distance sensor, stops. The descent of the cursor 30 is also stopped. Further, a reference point position (upper end position) of the cursor on the column 27 and a light receiving diode (not shown) corresponding to a light emitting diode (not shown) provided on the cursor 30 are located 10 cm below the reference point position. Each has a cursor 3 in the lowered position for height measurement.
When 0 returns to the original reference point position, 1 below the reference point position
The first light receiving diode at the 0 cm position is activated,
The drive speed of the motor M is switched. That is, the cursor rapidly rises up to 10 cm below the reference point position, the first light receiving diode receives light from the light emitting diode on the cursor side, and the up and down movement of the cursor is switched to a slow speed, When the second light receiving diode at the point position is activated, the raising of the cursor is stopped.
As described above, in this embodiment, since the cursor is moved down and up in a short time, the time required for measurement can be significantly reduced.

In the above embodiment, the rotation speed of the drive motor M for moving the cursor up and down is switched in two steps. However, the rotation speed of the motor M is constant,
A speed conversion mechanism (clutch) such as a gear mechanism may be provided in a rotation driving force transmission path between the motor M and the lower roller 23 to switch the rotation speed of the lower roller 23, that is, the vertical movement speed of the cursor.

FIG. 9 is a sectional view of the essential parts of the second embodiment of the present invention. Reference numeral 50 is a vertically extending screw rod, and a ball screw slide unit 51 in which the cursor 30 is connected and integrated is attached to the screw rod 50. Code 5
Reference numeral 2 denotes a screw rod extending parallel to the screw rod 50, and a ball screw slide unit 53 for supporting the pulley 36 for winding the electric cord is attached to the screw rod 52. The slide units 51 and 53 are also slidably attached to a vertically extending guide rod (not shown), and the rotation of the screw rods 50 and 52 causes the slide units 51 and 53 to move up and down along the screw rods 50 and 52. To do. The screw rods 50 and 52 are interlocked via the reduction gear mechanism 55, and the rotation speed of the screw rod 52 is set to 1/2 of the rotation speed of the screw rod 50. That is, the raising / lowering amount of the pulley 36 is set to 1/2 of the raising / lowering amount of the cursor 30, so that the electric cord 37 is not loosened.

In the embodiment shown in FIG. 9 described above,
The screw rod 52 is driven independently without being linked with the screw rod 50, and the control unit 40 controls the rotation speed or the rotation amount of this motor to be 1/2 of the driving motor M of the screw rod 50. You may
In addition, in the first embodiment, the rotary encoder 45 integrally provided on the toothed roller 23 for driving the lifting belt.
Although the moving amount of the cursor 30 is obtained by the above, the moving amount of the cursor may be obtained from the distance to the parietal region obtained by the ultrasonic sensor 32 provided in the cursor 30. In this case, the rotary encoder 45 It becomes unnecessary.

[0019]

As is apparent from the above description, according to the height measuring device of the present invention, the arithmetic processing unit obtains the distance from the top of the head to the cursor based on the signal from the distance sensor provided on the cursor, This distance information is preset
When the value is smaller than the reference value , the arithmetic processing unit uses the cursor moving means to move the cursor quickly.When the value is smaller than the reference value , the arithmetic processing unit operates the cursor moving means to move the cursor. Before moving slowly. This will make the cursor
High-speed movement from the reference point position at the top of the column to the set position on the top of the column
Is possible. In other words, the time required during that time can be shortened.
That is, the measuring time is shortened, and particularly, many height measurements can be performed in a short time . Also, the pressure of the cursor on the top of the head
Since the contact strength is small, it does not cause discomfort to the person being measured.
Since there is no head movement due to pressure contact, measurement error can be reduced.
Wear. Furthermore, there is no unnecessary pressure on the top of the head, and the height is measured.
We may not give detailed support to infants who are not familiar with
There is an advantage that it can be measured easily.

[Brief description of drawings]

FIG. 1 is a perspective view of a height measuring device according to an embodiment of the present invention.

FIG. 2 is a view for explaining a moving means of a cursor and an electric cord guide pulley of the apparatus.

FIG. 3 is an enlarged view of a main part of the moving means.

FIG. 4 is an enlarged view of the moving means.

FIG. 5 is a diagram showing a relationship between a cursor and a movement amount of an electric cord guide pulley.

FIG. 6 is a cross-sectional view of the vicinity of a motor drive unit of the elevating belt.

7 is a sectional view taken along line VII-VII shown in FIG.

8 is a sectional view taken along the line VIII-VIII shown in FIG.

FIG. 9 is a cross-sectional view of the essential parts of the second embodiment of the present invention.

[Explanation of symbols]

 20 Supports 21 Movable Supports 21a Guide Rails 22 Upper Rollers 23 Lower Rollers 24 Elevating Belts with Teeth 25 Gear Mechanisms 26 Fixed Racks 27 Fixed Supports 28a, 28b Slide Rollers 30 Cursors 31 Side Plates 32 Ultrasonic Sensor Units 33 Pinion Gears 36 Electric cord winding guide pulley 37 Electric cord 40 Control unit with display unit 45 Rotary encoder as distance detecting means M Drive motor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuyuki Nagahori 1-243 Asahi Kitamoto City, Saitama Prefecture A & D Development and Technology Center (56) Reference JP-A-2-276402 (JP, JP, A) Japanese Unexamined Patent Publication No. 3-6603 (JP, A) Japanese Patent Publication No. 53-2583 (JP, B2) Actual Japanese Publication No. 3-27611 (JP, Y2)

Claims (3)

(57) [Claims] 1. A base on which a person to be measured is placed, a pillar standing upright from the base, a cursor that moves up and down along the pillar and comes into contact with the top of the head to stop, and the cursor along the pillar. A height measuring device comprising a moving means for moving, a position sensor for detecting a reference position of the cursor and a stop position at the top of the head, and an arithmetic processing unit for calculating a height from an output signal of the position sensor, The cursor is on the cursor
Distance sensor that measures the distance from the head to the crown of the person being measured
Is provided, and the arithmetic processing unit is
Compare the detected distance information with a preset reference value
However, when the cursor descends, the distance information is
When moving above, the cursor movement speed is high and
In the case below, the cursor movement speed is reduced so that
A height measuring device characterized by controlling a moving means . 2. The height measuring device according to claim 1, wherein the distance sensor is an ultrasonic sensor and also serves as a position sensor. 3. The height measuring apparatus according to claim 1, wherein the support column includes a fixed support column fixed to a base and a movable support column that is raised and lowered with respect to the fixed support column.