Shoe measuring device

Abstract

A measuring device is disclosed which can be used in mass production of shoes. The device includes two parts: the first one is for measurement of the shoe width and girth having movable elements and the second one, which is mechanically connected with the first one, is positioned in a heel section of the shoe. The device also allows determining how tight movable elements fit to internal surface of the shoe. The first part is made in the form of a measuring head with movable cheeks and tongue placed on the toe rod, and the second part is in the form of a rod with a support roller. The mechanical connection between the parts is made in the form of a device angle measurement unit. The angle measurement unit is made using a single-turn absolute encoder. The technical result is in an increase of the accuracy of measurements.

Claims

1. A device for measuring a shoe, comprising a first part for measuring a width and a girth of the shoe with a mechanical connection with a second part, the second part being a heel part, the first part having at least two movable elements and means for measuring a tightness of a fit of the movable elements to an inner surface of the shoe, wherein the mechanical connection between the first and the second parts is made in a form of a unit for measuring an angle between rods of the first and the second parts, the first part is made in a form of a measuring head on the toe rod, the measuring head having movable cheeks and a tongue, and the second part is made in a form of the rod with a support roller.

2. The device according to claim 1, wherein the unit for measuring the angle is made as a single-turn absolute encoder positioned in a housing, with a free end of the toe rod being rigidly connected to a shaft of the encoder, and a heel rod having its free end rigidly connected with the encoder housing.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) To clarify the design features of the claimed technical solution, drawings are shown, where in

(2) FIG. 1 shows a general view of a measuring block;

(3) FIG. 2 is a diagram of the placement of the measuring device inside the shoe;

(4) FIG. 3 shows the design of the tongue drive;

(5) FIGS. 4A and 4B show the design of the drive for the cheeks of the measuring head;

(6) FIG. 5unit for measuring the angle of the device.

(7) In the drawings, the following notation is used:

(8) 1a handle, with a control and power unit located in it,

(9) 2unit measuring the angle of the device,

(10) 3heel unit,

(11) 4unit determining the width and girth of shoes,

(12) 5measuring head

(13) 6left cheek,

(14) 7right cheek,

(15) 8toe rod,

(16) 9encoder unit,

(17) 10button for recording of parameters

(18) 11start button for measuring the width,

(19) 12start button for measuring the girth,

(20) 13emergency stop button,

(21) 14reverse button

(22) 15arm rod

(23) 16heel rod,

(24) 17drive unit for cheeks,

(25) 18drive unit for tongue,

(26) 19tongue

(27) 20left arm of the toe rod,

(28) 21right arm of the toe rod,

(29) 22heel support roller,

(30) 23left tongue guide

(31) 24right tongue guide

(32) 25tongue stepper motor

(33) 26drive screw for tongue drive

(34) 27encoder rod,

(35) 28encoder housing,

(36) 29bearing

(37) 30front stepper motor for cheek drive,

(38) 31rear stepper motor for cheek drive,

(39) 32pin for fastening cheek to the drive screw of the front engine,

(40) 33pin for fastening cheek to the drive screw of the rear engine,

(41) 34worm wheel for transmission of front engine,

(42) 35worm wheel for transmission of rear engine,

(43) 36shaft of worm wheel for transmission of rear engine,

(44) 37shaft of worm wheel for transmission of front engine,

(45) 38, 40drive screw for transmission of front engine,

(46) 39, 41drive screw for front transmission of rear engine,

(47) 42, 43holes for pins.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

(48) The following is a detailed description of the proposed invention with reference to the drawings.

(49) The measuring head contains unit 4 determining the width and girth of shoes with moving elements and the heel unit 3 mechanically connected with the latter, as well as a means of determining the fit of the moving elements of the unit 4 determining the width and girth of the shoe of the inner surface of the shoe.

(50) The unit 4 determines the width and girth of the shoe made in the form placed on the toe rod 8 measuring head 5 with movable cheeks 6, 7 and tongue 19, and the heel unit 3in the form of a heel rod 16 with a heel support roller 22. The mechanical connection unit 4 with unit 3 in the form of unit 2 measuring the angle of the device.

(51) The unit 2 measuring the angle of the device (FIG. 1) contains the unit 9 of the encoder housed in the encoding housing 28 (FIG. 5), with elements of independent fastening of three rods: the arm rod 15 of the handle 1, the heel rod 16, the toe rod 8. The heel rod 16 is fixed rigidly only on the encoder housing 28. The toe rod 8 is rigidly mounted only on the encoder rod 27. The arm rod 15 is fully mounted on the bearing 29 and the rotation of the encoder rod 27 relative to its housing 28 is not affected. As part of unit 2 for measuring the angle of a device, a single-turn absolute encoder is used.

(52) The handle 1, placed on the rod 15, has an ergonomic body. Inside the body of the handle 1 is placed the power supply and control unit. The control buttons (10-14) are brought to the side surface of the handle 1 and, in the one shown in FIG. 1 example showing the implementation of the invention, are located from top to bottom: button 10 for recording of parameters, button 11 for start measuring width, button 12 for start measuring girth, button 13 for emergency stop, button 14 for reverse.

(53) Means for determining the fit of movable elements to the inner surface of the shoe is implemented in hardware in the control unit. The fit algorithm uses information on the increase in current in the power supply circuit of a stepper motor, which moves the movable element, depending on the size of the contact patch of the element and the pressure exerted by the movable element on the inner surface of the shoe.

(54) The heel unit 3 (FIG. 1) comprises a heel rod 16 and a heel support roller 22. The rod 16 is rigidly fixed to the encoder housing 28 by an upper part. In the lower part of the rod 16 is placed the heel support roller 22. The roller 22 is placed on an axis fixed in the lower part of the rod 16 and has the ability to freely rotate relative to the latter.

(55) If necessary, the heel rod 16 can easily be replaced by an analogue of a different length, for example, when measuring high-heel shoes of small sizessize 36 and smaller or when measuring low-heel shoes of large sizes (41 and above). The rod 16 can also be made with an adjustable length.

(56) The unit 4 determine the width and girth made in the form of a measuring head 5, which is mounted on the toe bar 8. The pivotal end of the toe rod 8 is attached to the unit 2 measuring the angle of the device, more precisely to the rod 27 of the encoder (FIG. 5).

(57) The measuring head 5 contains movable cheeks 6 and 7 with a drive unit 17 of the cheeks, a movable tongue 19 with a drive unit 18. The directions of movement of the cheeks 6, 7 and tongue 19 are shown by arrows in FIG. 1. The outer surface of the cheeks 6, 7 and the tongue 19 has a smooth streamlined shape that follows the shape of the shoe. The movement of the cheeks 6, 7 and the tongue 19 is carried out by engines 25, 30, 31 (FIGS. 3 and 4). As engines, Nema 11 stepper motors can be used.

(58) Moving the tongue 19 along the arms 20 and 21 is carried out by means of a helical gear. The drive screw 26 articulated with the shaft of the stepping motor 25 interacts with the nut of the drive screw (not shown in FIG. 3) placed in the movable tongue 19.

(59) The bottom view of the measuring head 5 (FIG. 4A and FIG. 4B) shows the design of the drive of the cheeks 6, 7. On the shafts of the engines 30, 31 are placed worm gears. The shafts 36, 37 of the wheels 34, 35 of the worm gears are hollow with an internal running thread. The hollow shaft performs the function of the threaded spindle nuts, the left side of the shaft having the left running thread, and the right side the right running thread. The running thread can be made directly in the shaft body or the internal cavity of the shaft can be equipped with appropriate screw nuts pressed inward. The threaded parts of the spindle screws 38, 39, 40, 41 of screw gears are placed in the corresponding threaded parts of hollow shafts 36, 37. The free ends of the spindle screws 38, 39 are fixed in the front and rear parts of the cheek 6 with pins 32 and 33 placed in the holes 42, 43 spindle screws 38, 39. Fastening the cheek 7 is carried out in a similar way. Fastening the cheeks using pins provides a slight gap in the joint, which allows for more accurate positioning of the front and back cheeks inside the shoe.

(60) The device works and is used as follows.

(61) Stage 1The operator, holding the handle 1, immerses the measuring block in the shoes (FIG. 2).

(62) Stage 2Pressing on the handle 1, the operator fixes the support heel roller 22 at the most protruding point of the heel. The measuring head 5 is positioned approximately at the widest point of the sock.

(63) Stage 3The operator presses the start button 11 of the width measurement. Engines 30 and 31 are turned on. The cheeks 6 and 7 move apart. The operator, by the handle 1, controls their position at the widest point of the toe. The shape of the cheeks repeats the shape of the surface of the shoe's shoe; therefore, the correct position of the measuring head 5 is visually visible.

(64) Stage 4The cheeks 6, 7 are moved apart until their cheek surfaces are completely in contact with the inside surface of the shoe. The pressure exerted by the cheeks on the surface of the shoe with full contact is about 1 kilogram-force per side. When the surface area of one cheek is about 3 cm2, the pressure is about 330 kilogram-force/cm2.At such pressures, the material of the shoes practically does not stretch. The pressure created leads to a peak load on the motors 30, 31. At the indicated calculated load, the interruption of the cheeks extension of about 1 kgf per side increases the current in the motor power supply circuit by about 10%. This serves as a signal for the control unit to form a command to stop the engines.

(65) Stage 5The operator presses the start button for measuring the girth and turns on the engine 25 (FIG. 3). Due to the chassis thread, the tongue 19 moves along the arms 20, 21 forward until it comes into contact with the lifting of shoes. The stop occurs at the command of the control unit, configured as described above in step 4.

(66) Stage 6after the shoes are filled from the inside, when the operator is visually controlled, the button 10 is pressed. When this button is pressed, the control unit records the total data: the number of steps each engine 25, 30, 31 has went, and the angle between the rods 8 and 16. This data sent for processing in the PC. The following values are uniquely determined from them: shoe size, width in the ball of the foot area, and girth in the ball of the foot area.

(67) Stage 7The operator presses the button 14. The working parts of the device return to their original position, the direction of rotation of all three engines is reversed. Interruption is also done by increasing the current when planting moving parts (cheeks and tongue) in the starting places.

(68) The use of a measuring head with three movable elements in conjunction with a unit measuring the angle of the drive improves the accuracy of measurement of footwear parameters.