JPH07111328B2 - Cylindrical specimen diameter measuring device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an apparatus for measuring the diameter or circumference of a cylindrical object, and in particular, in a quality measuring apparatus for inspecting cigarettes, filter plugs, etc. The present invention relates to a diameter measuring device suitable for automating circumference measurement.

[Conventional technology]

Conventionally, the circumference of a cigarette, a filter rod, or the like is measured by an air micrometer method or a tape gauge method.

The air micrometer method detects an increase in back pressure of air passing through the gap between the nozzle and the sample when a sample is inserted into a cylindrical nozzle of a fixed diameter and a fixed amount of air is flown into the cylindrical nozzle, and the back pressure is detected. The circumference of the cigarette is calculated from the relationship between the gap and the gap.The tape gauge method wraps the tape with one end fixed on the sample and measures the circumference based on the displacement of the other end of the tape from the reference position. It is what you want.

[Problems to be solved by the invention]

However, according to the air micrometer method, the sample may be deformed due to the high air blowing pressure in the cylindrical nozzle, and in the case of cigarettes and filter plugs, the measured value depends on the air permeability of the wrapping paper. There is a problem that Further, when the standard winding diameter is changed due to the difference in the type of sample, there is a problem that the cylindrical nozzle must be replaced and the correction formula showing the relationship between the back pressure and the gap must be reset each time.

Further, according to the tape gauge method, there is a problem that the measurement accuracy depends on the hardness of the cigarette or the winding of the cigarette or the distortion of the wrapping paper, and the standard position of the tape needs to be adjusted for each different standard winding diameter. .

Further, there is a demand for a diameter measuring device suitable for automating the circumference measurement in the quality measuring device.

[Means for solving problems]

The diameter measuring device for a cylindrical specimen of the present invention made to solve the above-mentioned problems is a pair of rotating rollers that rotate by placing the cylindrical specimen in parallel with the rotation axis, and the cylindrical specimen, By a chute that rolls so that the axis of the cylindrical sample is parallel to the rotation axis of the rotating roller to supply the cylindrical sample onto the rotating roller, and the cylindrical sample mounted on the pair of rotating rollers. A light projecting unit that emits a light beam that is partially shielded, a light receiving unit that receives the light beam and outputs according to the amount of light received, and a light receiving unit that is parallel to the rotating shaft of the rotating roller near the upper surfaces of the pair of rotating rollers. And a pusher for ejecting a specimen that reciprocates in the direction, control for supplying the cylindrical specimen to the chute, control of rotation and stop of the pair of rotating rollers, and control of reciprocating movement of the pusher, and the pair of Rotating roller Therefore, for the cylindrical specimen to be rotated, the output of the light receiving unit when the cylindrical specimen shields a part of the light flux is detected at a plurality of rotation positions, and based on the detected output of the light receiving unit. A control unit for determining the diameters of the cylindrical specimen at a plurality of positions, the operation of supplying the cylindrical specimen onto the rotating roller via the chute by the control of the control unit, and the specimen on the rotating roller The operation of detecting the output of the light receiving section and the operation of discharging the cylindrical sample on the rotating roller by the pusher are performed.

[Work]

When a part of the light beam from the light projecting unit is shielded by a cylindrical sample such as a cigarette, the shielding amount changes according to the diameter of the sample, and the output of the light receiving unit changes according to the shielding amount. Then, the control unit obtains the diameter of the sample based on the output of the light receiving unit.

When the cylindrical sample is rotated by the rotating roller, the output of the light receiving unit is detected at a plurality of rotational positions of the cylindrical sample, and the diameters are obtained at the plural positions of the cylindrical sample.

Further, the cylindrical sample can be supplied onto the rotating roller simply by rolling it on the chute, and can be easily discharged by simply reciprocating the pusher in the direction parallel to the rotation axis of the rotating roller.

〔Example〕

FIG. 1 is a side view showing an embodiment of the diameter measuring device of the present invention, which is used in a cigarette quality measuring system.

FIG. 2 is a diagram showing the front surface and a sample weight measuring unit in the quality measuring system.

In the figure, 11 is a sample rotation roller having a pair of rollers whose central portion is constricted, 12 is a light projecting section that emits a parallel laser beam having a constant light amount wider than the sample, and 13 is a laser beam from the light projecting section 12. A light-receiving unit that receives light outputs a voltage according to the amount of light received.

Reference numeral 14 denotes a sample rotation roller motor that rotationally drives the sample rotation roller 11 via the timing belt 15. The pair of rollers of the sample rotation roller 11 are rotated in the same direction as indicated by arrows in FIG.

Reference numeral 16 is a pusher for discharging the sample placed on the sample rotation roller 11, 17 is a pusher cylinder for driving the pusher 16, and as will be described later, the pusher cylinder 17 causes the pusher 16 to move by compressed air supplied to the pusher 16 as shown in FIG. Drive in the left and right direction.

Reference numeral 21 is a supply drum having a plurality of grooves 21a formed around it, and 22 is a balance having a weighing table 22a. The sample A in the groove 21a is sequentially supplied to the weighing table 22a every time the supply drum 21 rotates by a certain angle. Then, the weight is measured.

Reference numeral 23 is a discharge claw rotated by a motor (not shown), and 24 is a chute mounted on the sample rotation roller 11 from the weighing table 22a. When the discharge claw 23 makes one full rotation in the clockwise direction in FIG. 2, the weight measurement is completed. The sample A is lifted from the weighing platform 22a and discharged to the chute 24, and the sample A rolls on the chute 24 and is placed on the sample rotation roller 11.

FIG. 3A and FIG. 3B are plan views showing the sample rotation roller 11.

When the sample is not placed on the sample rotation roller 11, the laser beam B from the light projecting unit 12 is transmitted as shown in FIG.
Is projected to the light receiving portion 13 (not shown) side through the constricted portion 11a of the sample rotating roller 11, and there is nothing to block within the diameter d of the laser beam B, so that the light receiving portion 13 sets a predetermined constant value. The output voltage of is obtained.

Further, when the sample is placed on the sample rotation roller 11, the laser beam B having a diameter larger than that of the sample A is partially shielded by the sample A as shown in FIG. Output voltage is low. Therefore, the width at which the laser light flux B is shielded, that is, the diameter of the specimen A is obtained according to the output voltage of the light receiving unit 13.

The light projecting unit 12 and the light receiving unit 13 are used not only for measuring the diameter of the sample, but also as sensors for detecting the presence or absence of the sample on the sample rotation roller 11 based on the change in the amount of received light.

As the light projecting unit 12 and the light receiving unit 13, for example, a laser type discrimination sensor (LX-130) manufactured by Keyence Corporation can be used. In this case, the diameter d of the laser beam is 10 mm, the output voltage is 5 V when there is no light shielding, and 1 V when there is complete light shielding. According to the experimental example, the relationship between the output voltage E and the diameter D of the sample is D (mm) = 12.3146 (mm) -2.4171 (mm / V) x E (V) (1).

FIG. 4 is a block diagram of the embodiment. It should be noted that, for the sake of simplicity, the figure shows the specimen weight measuring unit in a different direction.

In the figure, reference numeral 18 denotes a control unit equipped with a microprocessor or the like, which outputs various control signals from the output port (O) and inputs the detection signal and the detection data from the input port (I) to measure the circumference of the sample and the sample. Control the supply and discharge of.

A controller 19 drives and controls the sample rotation roller motor 14, and receives a control signal output from the control unit 18 to drive and stop the sample rotation roller motor 14.

Reference numeral 25 denotes an on-balance sample detection sensor that detects the presence or absence of a sample on the balance 22a of the balance 22, and the detection signal is input to the control unit 18.

26 is a supply drum motor for rotationally driving the supply drum 21, 28
Is a discharge claw motor that rotationally drives the discharge claw 23. The supply drum motor 26 and the discharge claw motor 28 are driven and controlled by the controller 27 and the controller 29 based on the control signals output from the control unit 18, respectively.

Reference numeral 17a denotes a solenoid valve that supplies compressed air from the air head 40 to the pusher cylinder 17, and changes the supply direction of compressed air based on a control signal from the control unit 18 so that the pusher cylinder 17 is in the "ON" or "OFF" state. And pusher 16
Move back and forth. The pusher cylinder 17 moves the pusher 16 to the right in FIG. 1 when "ON", and moves to the left when "OFF".

Reference numeral 17b denotes a pusher detection switch for detecting the state of the pusher cylinder 17, which is "ON" when the pusher 16 is retracted to the pusher cylinder 17 side and is "OFF" when the pusher 16 is driven.

31 is a cylindrical reversing holder into which the sample discharged from the sample rotating roller 11 by the pusher 16 is inserted, 32 is a reversing holder cylinder that rotates the reversing holder 31 around a single point, and in the same figure, the reversing holder 31 is horizontal. When the sample A is in the position of, the sample A is inserted, and when it is rotated to the vertical position, the sample A drops downward and is discharged.

Reference numeral 32a is a solenoid valve that supplies compressed air from the air head 40 to the reversing holder cylinder 32. The reversing holder cylinder 32 is turned "ON" or "OFF" by changing the compressed air supply direction based on a control signal from the control unit 18. Then, the reversing holder 31 is reciprocally rotated. The reversing holder cylinder 32 rotates the reversing holder 31 from the vertical position to the horizontal position when "ON", and rotates from the horizontal position to the vertical position when "OFF".

Reference numeral 32b denotes a reversing holder detection switch for detecting the state of the reversing holder 31, which is "ON" when the reversing holder 31 is in the horizontal position and "OFF" when the reversing holder 31 is being rotated.

FIG. 5 is a flowchart showing the control of the control unit 18,
The process of measuring the circumference of the sample and discharging it will be described.

Before measuring the circumference, the control unit 18
When the pusher detection switch 17b and the reversing holder detection switch 32b are both "ON" while detecting the sample A on the weighing platform 22a with, the ejection claw motor 28 is driven via the controller 29, and the ejection claw 23 Is rotated to place the sample A on the sample rotation roller 11.

When the sample A is detected based on the output of the light receiving unit 13,
A control signal is output to the controller 19 to drive the sample rotation roller motor 14 to rotate the sample A on the sample rotation roller 11.

Next, the output voltage of the light receiving unit 13 is read, the read data is stored in the memory, and the index n indicating the number of sampled data is incremented.

Then, until the index n reaches a preset value N, the data is read and stored sequentially in the memory in a constant sampling period in the same manner as above.

When a fixed number (N) of data are stored in the memory as described above, a control signal is output to the controller 19 to stop the sample rotating roller motor 14.

When the sample rotation roller motor 14 is stopped, the pusher cylinder 17 is turned on, the pusher 16 is moved until the sample A on the sample rotation roller 11 is stored in the reversal holder 31, and the pusher cylinder 17 is turned off after a certain period of time. ", And pusher 16 back to its original position.

Next, the reversing holder cylinder 32 is turned “ON”, the reversing holder 31 is rotated to the vertical position, and the sample A is discharged downward,
After a certain period of time, turn the reversing holder cylinder 32 "OFF",
Rotate the reversal holder 31 to the horizontal position.

When the discharging operation is completed, a plurality of data stored in the memory are read out, the diameter is obtained by the above equation (1), and the circumference is further calculated. Further, the true cylinder of the sample A is evaluated based on the maximum value and the minimum value of the plurality of data, and the calculation result, the evaluation result, etc. are printed out to a printer (not shown).

As described above, the circumference of the sample can be measured by the non-contact method, and the measurement error does not occur due to the ventilation resistance of the cigarette, the filter plug, or the like, the hardness of the winding, or the like.

〔The invention's effect〕

As described above, according to the diameter measuring device for a cylindrical specimen of the present invention, a cylindrical specimen such as a cigarette is fed by a chute and supplied onto a pair of rotating rollers, and the specimen is rotated by this rotating roller, The amount of light such as a laser beam that is partially shielded by this rotating sample is detected at multiple rotational positions of the sample, and the diameter is obtained at multiple rotational positions based on the amount of light received according to this amount of light shielding, and then measured. Since the finished sample is ejected by a pusher that reciprocates in parallel with the rotation axis of the rotating roller, it is possible to perform contactless measurement on samples such as cigarettes, and to measure the hardness or distortion of the roll. Accurate measurement can be performed without being affected.

Further, since the diameters are measured at a plurality of positions, the average diameter or the average circumference can be obtained, so that not only accurate measured values can be obtained but also true cylinders can be evaluated.

Further, the sample need only be rolled on the chute and placed on the rotating roller, and since the sample can be discharged only by the reciprocating movement of the pusher, the supply of the sample by the chute, the measurement on the rotating roller, Since it is extremely easy to control a series of operations of discharging the sample from the rotating roller, it is possible to continuously measure a plurality of samples and it is easy to apply to automation.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the diameter measuring device of the present invention, FIG. 2 is a view showing the front of the device of the embodiment and a sample weight measuring section in the quality measuring system, and FIG. 3 is showing the embodiment. FIG. 4 is a plan view showing a sample rotating roller, FIG. 4 is a block diagram of an embodiment, and FIG. 5 is a flowchart showing control of a control unit in the embodiment. 11 …… Sample rotation roller, 12 …… Emitter, 13 …… Receiver,
14 …… Sample rotation roller motor, 15 …… Timing belt, 16 …… Pusher, 18 …… Control section.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-58-169013 (JP, A) JP-A-53-143356 (JP, A) Actual opening 57-152304 (JP, U) Actual opening 57- 61509 (JP, U)

Claims (1)

[Claims] 1. A pair of rotating rollers that rotate by placing a cylindrical specimen parallel to a rotation axis, and the cylindrical specimen such that the axis of the cylindrical specimen is parallel to the rotation axis of the rotating roller. A chute for feeding the cylindrical sample onto the rotating roller, a light projecting unit for emitting a light beam partially blocked by the cylindrical sample mounted on the pair of rotating rollers, and A light receiving unit that receives light and outputs according to the amount of received light, a pusher for ejecting a sample that reciprocates in the direction near the upper surfaces of the pair of rotating rollers in a direction parallel to the rotation axis of the rotating rollers, and the circle on the chute. The columnar specimen is controlled for supplying a columnar specimen, controlling the rotation and stop of the pair of rotating rollers, and controlling the reciprocating movement of the pusher, and for the columnar specimen rotated by the pair of rotating rollers. A control unit that detects the output of the light receiving unit when a part of the light flux is shielded at a plurality of rotational positions, and obtains the diameters of the cylindrical sample at a plurality of positions based on the detected output of the light receiving unit. The operation of supplying the columnar sample onto the rotating roller via the chute by the control of the control unit, the operation of detecting the output of the light receiving unit for the sample on the rotating roller, the operation by the pusher. A cylindrical specimen diameter measuring device, characterized in that a series of operations for discharging a cylindrical specimen on a rotating roller is performed.