JP3456684B2 - Automatic inspection device for beverage bottle products sealed with PP cap - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to PP (pilfer-pro).
of packaging) The present invention relates to an automatic inspection device for beverage bottle products, in which a bottle product sampled from the production line side is used as a sample for a beverage bottle product sealed with a cap, and the PP cap winding inspection is automatically performed.

[0002]

2. Description of the Related Art Beverage bottle products such as soft drinks and drinks have their mouths sealed with the above-mentioned screw type PP cap to prevent tampering. This PP
The cap is formed by winding a drinking mouth of a bottle product (a threaded portion is formed on the outer periphery) with an aluminum thin plate, and as shown in FIG. 9, the PP cap 20 has a pressure-formed top portion. Squeezing portion 20a (which serves to seal the liner material put on the inner surface of the cap by biting into the end surface of the mouth of the bottle 21) and the thread portion 20b on the peripheral surface.
And a band portion 20c wrapped around the neck of the bottle 21 (if the PP cap is rotated when the cap is opened, the perforations made on the peripheral surface of this band will be cut and the cap can be removed)
And are formed.

By the way, as for the beverage bottle product, if the PP cap that seals the mouth is loose,
Since there is a risk of spilling the content of beverages during handling during transportation, beverage manufacturers sample beverage bottle products flowing through the production line for each lot of products, and perform PP cap tightening inspection on the sampled products. The data obtained from the inspection is fed back to the manufacturing department, and when necessary, the cap wrapping machine is readjusted to reflect it in production control and quality improvement of beverage bottle products.

In this case, as a tightening inspection item for judging the plugged state of the PP cap 20, the "narrowing depth" of the narrowing portion 20a (the portion from the top peripheral edge of the cap to the screw portion 20b) is described. (Step difference formed by drawing), and the dimension measurement inspection for measuring each dimension of the “screw depth” (depth of thread crests and troughs) of the threaded portion 20b, and “when the PP cap 20 is opened”. There is a torque measurement test that measures the "opening torque". Here, according to the management standard of the beverage manufacturer, the above-mentioned "narrowing depth" dimension D is 1.8 mm.
As described above, the “deepness” dimension d is specified to be 0.6 mm or more. In addition, regarding the cap dimension measurement inspection, in order to increase the reliability of the inspection data, P
The "narrowing depth" and "screw depth" are measured at two points A and B (see FIG. 9B) set at opposite positions on the circumference of the P cap 20, respectively. Regarding the measurement point of "depth", the position advanced by 360 ° from the start of the winding of the screw portion 20b is defined as point A, and 180 ° from here.
The management standard stipulates that the inspection should be performed with the returned position as point B.

Here, the conventional method for inspecting the tightening of the PP cap will be described. In the conventional inspection room, an inspector samples a plurality of bottle products flowing in the production line for each lot (withdrawing). I brought them back to the factory and inspected them one by one using the following method. That is, for the cap dimension measurement inspection, see FIG.
As shown by, adapters 23 and 2 corresponding to the "deepness" measurement and the "screw depth" measurement on the dial gauge 22.
4 using a dedicated measuring device, the dial gauge 22 touches the stepped portion of the narrowed portion 20a at the two measurement points A and B on the circumference of the PP cap 20 and the valley of the screw portion 20b as shown in the figure. Apply the needle 22a and visually read the pointer of the dial gauge in this state to measure the "narrowing depth" dimension D and the "screw depth" dimension d. After the data is recorded, statistical processing is performed to obtain various data such as average value, maximum value, minimum value, standard deviation, and defective rate of sampled bottle products to be inspected.

On the other hand, regarding the measurement of "opening torque",
A capping torque measuring machine for PP cap is commercially available (for example, a product MTP-40 manufactured by Shinpo Industry Co., Ltd.), and an inspector manually takes the bottles to be inspected to the capping torque measuring machine one by one. It is recommended to set and perform inspection work.

[0007]

By the way, the above-mentioned conventional PP cap tightening inspection method, in particular, the cap dimension measurement inspection method manually performed by an inspector one by one using a dial gauge, is Since the measured values vary greatly depending on the force of pressing the stylus of the dial gauge, sufficient reliability cannot be obtained for the measured data. In addition, since the bottled product is inspected manually one by one, the work efficiency is low. As a remedy for this, the PP cap winding inspection is automatically performed with inexpensive equipment investment.
Moreover, the advent of an automatic inspection device capable of performing with high accuracy is desired.

The present invention has been made in view of the above points. A first object of the present invention is to systematize a bottle bottle product sampled from a production line so that the PP cap winding inspection can be performed automatically and efficiently. The present invention is to provide an automatic inspection device, and the second purpose is P
Concerning dimensional measurement inspection of P cap, by making good use of the function of an inexpensive laser dimension measuring device, the "narrowing depth" and "screw depth" of PP cap can be contactlessly highly accurate and continuous in the same inspection process. The object is to provide a cap size measuring device capable of performing specific measurement.

[0009]

In order to achieve the first object, the automatic inspection apparatus according to the present invention uses a non-contact type in which the "narrowing depth" and "screw depth" of the PP cap are measured. Inspector body with an optical cap size measuring device for measuring on the inspection stage and a cap opening torque measuring device for measuring the "opening torque" of the PP cap on the inspection stage, and the bottle to be inspected from the production line side An introduction conveyor that aligns the products and supplies them to the inspection stage one by one, and a carry-out conveyor that discharges the inspected bottle products,
A handling device that transfers the bottle product to be inspected that has been carried into the inspection stage through the introduction conveyor to the cap size measuring device and the cap opening torque measuring device, a sequencer that controls the above devices in general, and the cap size measuring device and cap opening device. It shall be constructed in combination with a data processing means for totalizing and statistically processing the measurement data obtained by the plug torque measuring device.

According to the automatic inspection device having the above-mentioned structure, after the bottles to be inspected are sampled from the production line by a predetermined number for each lot, the bottles to be inspected are taken into the introduction conveyor, and then the cap dimension measuring device and the capping torque are measured one by one. Wrap-up inspection of each item such as "Throttle depth", "Screw depth" dimension measurement and "Opening torque" measurement of the PP cap that handed over to the device in order to seal the bottle, and then on the carry-out conveyor. It is possible to automatically perform a series of inspection work to be discharged, and the collection and statistical processing of measurement data obtained by each measuring device without resorting to manual work. In addition, in this automatic inspection device, in addition to the inspection mode in which the cap dimension measurement inspection and the opening torque measurement inspection are continuously performed, the inspection mode in which only the dimension measurement or the opening torque measurement is selected is selected. It is possible to

On the other hand, in order to achieve the above-mentioned second object,
The cap size measuring device of the present invention comprises a transmission type laser size measuring device and bottle moving means for axially moving the PP cap of the bottle to be inspected from a direction orthogonal to the laser optical path with respect to the measuring region of the measuring device. In the process of moving the cap measurement position of the bottle to be inspected along the axial direction by the bottle moving means, the creepage dimension of the PP cap of the bottle to be inspected is continuously detected by the laser dimension measuring device. The detected value and the cap movement amount are calculated and PP
The cap's “narrowing depth” and “screw depth” dimensions shall be configured to be measured in a non-contact manner.

Further, in the above cap size measuring apparatus, the bottle moving means has a turntable for mounting the bottle to be inspected in an upright posture, and the turntable is moved up and down to set the PP cap of the bottle product above it. The combination of a lifter that moves up and down with respect to the measurement area of the laser dimension measuring instrument, and with the bottle product to be inspected mounted on the turntable, combine the movement operation of the turntable and the lifter to combine the PP cap peripheral surface. There is a configuration in which the "narrowing depth" and "screw depth" are measured at the two measurement points set above.

By performing an inspection using such a cap size measuring device, the PP cap of the bottle product to be inspected is moved relative to the measurement area of the laser size measuring instrument, so that the PP capped in the bottle is sealed. Non-contact high precision for each dimension of "Throttle depth" and "Screw depth" of the cap,
In addition, continuous measurement is possible, improving the efficiency of inspection work and improving the reliability of measurement data.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings. First, FIG. 1 shows a system outline of the entire automatic inspection apparatus, and FIGS. 2 (a) and 2 (b) show the configuration of the actual machine. In each figure, 1 is a sample line for transporting beverage bottle products sampled for each lot from the production line, 2 is an inspection device main body, and 3 and 4 are branched from the sample line 1 and laid between them and the inspection device main body 2. Introducing conveyors and unloading conveyors 3a and 4a of the inspected bottle product (hereinafter referred to as "sample") are dampers as gates arranged at branch points between the conveyors 3 and 4 and the sample line 1. Further, in the inspection device main body 2, a cap dimension measuring device 6 of the PP cap 6, a capping torque measuring device 7, and a specimen cap size measuring device 6, a capping torque of the inspection stage 5 serving as a sample transport passage. The measuring device 7 is equipped with a handling device 8 for handing over. In addition, M1 to M5 shown in each part in the drawing of FIG. 1 are servo motors, SV1 to SV12 are cylinders (arrows next to each cylinder indicate the moving direction of the cylinder), and numbers are attached in the Δ mark. PH1 to PH23 are position sensors. Further, 9 is a programmable controller having a function as a sequencer for overall control of the entire system, an arithmetic function, and a transmission control function of measurement data, and 9a is a program creation of the programmable controller 9 and operation instructions and status display of an automatic inspection device. A programmable operation display (Programmable Operation Display) as a man-machine interface with a program memory for
Also called POD, which is the acronym for play. Less than,
Reference numeral 10 is a personal computer that collects and statistically processes measurement data. These devices are combined to construct an automatic inspection system.

Here, a detailed description of the structure of each part of the inspection apparatus main body 2 which is the main part of the system and the measurement operation will be described later. First, the introduction, measurement and unloading operations of the sample during the inspection of the entire system will be described. The flow of will be described.
First, when an inspection command is given from the operation display 9a, the damper 3a of the introduction conveyor 3 moves from the solid line position to the dotted line position by the sample introduction command from the programmable controller 9, and from the production line side via the sample line 1. The transported sample 11 is guided by the damper 3a and enters the introduction conveyor 3. Here, when a predetermined number of specimens 11 are aligned in a line and reach the position of the stopper 3b, the introduction conveyor 3 is temporarily stopped, the damper 3a is returned to the original position, and the predetermined number of samples taken from the sample line 1 are returned. The sample 11 is stocked on the introduction conveyor 3.

Next, in response to a carry-in command from the programmable controller 9, the introduction conveyor 3 is started, and then the specimens 11 are cut out one by one by the operation of the stopper 3b, and the pusher 3c arranged at the end position of the introduction conveyor 3 is pushed out. Is sent to the inspection stage 5 of the inspection device body 2.
Note that 3d and 3e provided at the corners of the transfer path are stoppers, and their moving point positions are set according to the size (bottle thickness) of the sample 11 so that the sample transfer operation can be performed smoothly. .

When the sample 11 is carried into the inspection stage 5, the handling device 8 moves forward from the illustrated standby position and the gripper 8a stops on the stage.
After grasping, move to the left and hand over to the cap dimension measuring device 6. It should be noted that the handling device 8 retreats and returns to the original position after passing the sample 11. Here, when the predetermined dimension measurement inspection (a method of the dimension measurement inspection will be described later) is completed for the PP cap capped in the bottle of the sample 11, the handling device 8 is advanced from the standby position again by the gripper 8b. Grab the specimen 11,
After moving to the left and passing it to the opening torque measuring devices 7 arranged in the subsequent stage, it returns to the original position. Then, when the opening torque measurement test of the sample 11 (the torque measurement test method will be described later) is completed, the handling device 8 again advances from the standby position, the gripper 8c grips the sample and moves to the left, and then further. The pusher 8d is operated to feed it to the left end corner of the stage 5, and the pusher mechanism 12 waiting at the corner is operated to carry it out to the carry-out conveyor 4 and align it on the conveyor. In this case, the main body of the inspection device can select the inspection mode in which the cap dimension measurement and the opening torque measurement are performed, the inspection mode in which only the cap dimension measurement is executed, and the inspection mode in which only the opening torque measurement is executed. If the inspection mode only measuring the cap dimension is selected here, the PP cap remains sealed, and therefore the damper 4a of the carry-out conveyor 4 is opened and then the pusher 13 is used from the right end of the conveyor. The sample 11 is sent out and returned to the sample line 1. On the other hand, when the inspection mode for opening torque measurement is selected,
Since the PP cap of the sample is opened, the sample 11 is not returned to the sample line 1 but is stocked on the carry-out conveyor 4 and removed by the inspector.

After the measurement data of each sample obtained by the cap size measuring device 6 and the cap opening torque measuring device 7 are stored in the memory section of the programmable controller 9,
Based on the output command, it is transmitted to the personal computer 10, where various data processing such as the average value, standard deviation, and defective rate of the measurement data corresponding to the number of sample samples is processed, and the result is displayed on the display and written in the floppy disk.
Then, this inspection result data is fed back to the production control department as quality control information.

Next, the structures of the cap size measuring device 6 and the cap opening torque measuring device 7 mounted on the above-described inspection device body 2 will be described with reference to FIGS. 3 to 5. First, as shown in FIG. 3, along the path of the inspection stage 5 laid inside the inspection device main body 2, the cap dimension measuring device 6 and the cap opening torque measuring device 7 are provided side by side in a line.

The cap size measuring device 6 is shown in FIG.
A turntable 6a for mounting the sample 11 in an upright posture, a servomotor 6b (M3) for rotating the turntable 6a, a ball screw 6c for carrying the turntable 6a and moving up and down as shown in FIG. A lifter 6e composed of a servomotor 6d (M4) constitutes a bottle lifting mechanism, and a transmission type laser dimension measuring instrument 14 is installed on the top of the lifter 6e. In the laser dimension measuring device 14, the light projecting portion 14a and the light receiving portion 14b are horizontally opposed to each other with a measurement region (scanning surface region of the laser light 14c) therebetween.
In addition, the measurement area is arranged directly above the turntable 6a.

With this structure, as described with reference to FIG. 1, the specimen 11 is placed on the turntable 6a from the inspection stage 5 by operating the handling device 8, and the lifter 6e is moved up in this state. Moves up and P
The P cap 20 enters the measurement area of the laser dimension measuring device 14 in the vertical direction, and the posture for measuring the creepage dimension of the PP cap 20 is ready.

On the other hand, as shown in FIG. 5, the unplugging torque measuring device 7 connects the torque detector / rotation angle detector 7b directly to the torque driver incorporated in the torque measuring head 7a, and at the lower end on the same axis. Is equipped with an air cap chuck 7c for gripping the PP cap 20 of the specimen 11 from above. The measuring head 7a is a servomotor 7d.
A clamper 7f that moves up and down along a column (ball screw) 7e by (M5) and grips the specimen 11 placed in an upright posture from both sides at the torque measurement position defined on the inspection stage 5 facing the measurement head 7a. Will be configured.

With this structure, the sample 11 placed at the measurement position of the inspection stage 5 is fixedly supported by the clamper 7f, and the measurement head 7a is lowered from the standby position above.
The PP chuck 2 of the specimen 11 by the cap chuck 7c
When the torque driver is rotated while holding 0, the opening torque is applied to the PP cap to open the cap, and the torque with respect to the rotation angle of the cap is detected during the opening process.

Next, a method for measuring the PP cap size of the sample 11 performed by the above-described cap size measuring device 6 will be described with reference to FIGS. First, the operation principle of the laser dimension measuring device 14 mounted on the cap dimension measuring device 6 is shown in FIG. That is, the laser light emitted from the semiconductor laser built in the light projecting portion 14a is reflected by the polygon mirror and the reflecting mirror, becomes a parallel light beam by the collimator lens, and is received by the light receiving portion 1.
The light is emitted toward 4b, and the specimen 11 placed in the measurement region is scanned and then collected by the light receiving lens and converted into an electric signal according to the brightness. Then, this electric signal is input to the calculation unit, where the length of time in which a shadow is generated is calculated to measure the outer diameter dimension of the sample 11.

On the other hand, FIGS. 6 (a) and 6 (b) are schematic diagrams showing a state in which the PP cap of a beverage bottle product is measured by using the laser size measuring device 14 as described above. The light receiving portion 14b of 6 (b) detects the edges E1 and E2 and measures the distance X from the fixed point (edge E1) to the peripheral surface of the PP cap 20. Then, the specimen 11 mounted on the turntable 6a in the standing posture is moved upward by giving position data to the lifter 6e, and the PP cap 2 is moved as shown in FIG. 6C.
While the sample 11 is further moved upward from the laser touch position Y1 where the top surface of 0 approaches the measurement area (laser light scanning area) of the laser measuring device, the range of Y1 and Y2 (narrowing portion) Measurement range of "narrowing depth" including stepped portion of 20a), and Y3 and Y4 range (measurement range of "screw depth" including one pitch of the threaded portion 20)
In the above, the distance X described above is continuously detected, and the detection signal and the moving distance (obtained by counting the number of pulses of the servo motor (digital pulse motor) 6d of the lifter 6e) are calculated by the arithmetic unit 14d of the measuring device 14, Or, by directly inputting to the programmable controller 9 shown in FIG. 1 to calculate the rate of change of the distance X with respect to the moving distance of the sample, and the maximum value (thread crest) and minimum value (thread trough), PP
The creepage dimension of the cap 20, that is, the “narrowing depth” D and the “screw depth” d of the PP cap 20 can be obtained.

Further, as described with reference to FIG. 9, in order to set the measurement points of "narrowing depth" and "screw depth" at two points A and B on the circumference of the PP cap 20 as the management standard of the beverage maker. In addition, the following measures are taken. That is, for the sample 11, as shown in FIG. 6A, a neck A of the bottle 21 is preliminarily marked with an A point mark, and the A point mark is rotated by the rotation of the turntable 6a.
After detection by the position sensor PH13 shown in (1), the turntable 6a is rotated by a predetermined angle, and the side surface of the PP cap 20 corresponding to the point A mark is positioned so as to be parallel to the laser beam of the measuring instrument 14. By performing the measurement in this state according to the procedure described above, the “narrowing depth” and “screw depth” of the cap along the point A mark can be measured. And A
After the point dimension measurement is completed, the lifter 6e is returned to the origin position (measurement start position of the A point mark), and
If the turntable 6a is rotated by 180 ° here, the specimen 11 will face the point B opposite to the point A. Therefore, while keeping this orientation, the specimen 11 is moved up and moved by the same procedure as described above. By measuring the creepage dimension of the cap 20, the “narrowing depth” and “screw depth” at point B can be measured.

Next, a method of measuring the opening torque of the PP cap by the opening torque measuring device 7 will be described with reference to FIGS. 8 (a) and 8 (b). FIG. 8A is a schematic diagram showing a state in which the PP cap opening torque of the sample 11 is being measured, and the inspection stage 5
When the sample 11 is set at a predetermined measurement position above, the clamper 7f holds the bottle 21 of the sample 11 and
The measuring head moves downward from above, and the cap chuck 7c holds the PP cap 20. Then, when a measurement start command is given, the measurement operation is executed as described below. That is, the torque driver rotates at a slow speed to open the PP cap 20. Further, in the process of this opening operation, the detection data of the rotation angle and the torque are input from the torque detector / rotation angle detector 7b to the analyzer 7g attached to the measuring device. Here, in the analyzer 7g, as shown in FIG. 8B, a torque curve simulating the rotation angle and the torque change accompanying the opening of the PP cap 20 is displayed on the display, and # 1 on the torque curve is displayed. Programmable controller (Fig. 1) with each torque value as (torque when cap starts to slip), # 2 (torque when cap bridge breaks), # 3 (torque when cap band breaks) Output).
When the cap opening torque measurement is completed, the torque driver stops, and then the air cap chuck 7c
Is opened and separated from the sample 11, the measuring head 7a is elevated to the standby position. Also, open the clamper 7f and open the sample 1
Free 1

Incidentally, the above-described opening torque measuring device 7 is
For example, it can be carried out by adopting a product obtained by modifying the prototype "opening torque automatic measuring device" (model MTP-40) of Sympo Industry Co., Ltd. and incorporating it into the inspection device main body 2 as shown in FIG.

[0029]

As described above, the structure of the present invention has the following effects. 1) According to the constitution of claim 1, after taking inspected bottle products sampled by a predetermined number for each lot from the production line into the introducing conveyor, the cap dimension measuring device and the uncapping torque measuring device are individually fed Perform the tightening inspection of each item such as "Throttle depth", "Screw depth", and "Opening torque" of the PP caps that have been handed over in order and sealed the bottles, and then discharge to the carry-out conveyor. It is possible to improve the efficiency of inspection work by performing a series of inspection work as well as the totalization and statistical processing of the measurement data obtained by each measuring device fully automatically without resorting to manual work.

2) Further, in the dimension measuring and inspecting step of the PP cap, by using the cap dimension measuring device according to claims 2 and 3, the laser dimension measuring device which is less expensive than image processing systems such as CCD cameras and video sensors. By skillfully using the measurement function of, the non-contact and highly accurate and continuous measurement of each of the "narrowing depth" and "screw depth" of the PP cap sealed in the beverage bottle can be performed. Streamlining work,
The reliability of measurement data can be improved.

[Brief description of drawings]

FIG. 1 is a system schematic diagram of the entire automatic inspection apparatus according to an embodiment of the present invention.

2A and 2B are layout diagrams of the actual machine configuration of the automatic inspection device shown in FIG. 1, in which FIG. 2A is a plan view and FIG. 2B is a front view.

FIG. 3 is a structural layout diagram of main parts in the inspection apparatus body of FIG.

FIG. 4 is a detailed structural diagram of the cap dimension measuring device in FIG.

5 is a detailed structural diagram of the cap opening torque measuring device in FIG.

6A and 6B are explanatory views of a measuring method of the cap dimension measuring apparatus shown in FIG. 4, in which FIG. 6A is a diagram schematically showing a measurement state of a sample, FIG. 6B is the same plan view, and FIG. The figure showing the relation between the "narrowing depth" and "screw depth" of the PP cap and the laser measurement position.

FIG. 7 is a measurement principle diagram of the laser dimension measuring device in FIG.

8A and 8B are explanatory views of a measuring method of the cap opening torque measuring device shown in FIG. 5, where FIG. 8A is a diagram schematically showing a measurement state of a sample, and FIG. 8B is an opening obtained by measurement. Torque curve diagram

9A and 9B are explanatory views of a conventional PP cap dimension measuring method, in which FIG. 9A is a measurement state diagram of “narrowing depth” and “screw depth”, and FIG. 9B is a top view of the PP cap.

[Explanation of symbols]

1 sample line 2 Inspection device body 3 Introduction conveyor 4 unloading conveyor 5 inspection stage 6 Cap size measuring device 6a turntable 6e lifter 7 Cap opening torque measuring device 8 Handling device 9 programmable controller 9a Programmable operation display 10 PC 11 samples (bottle products to be inspected) 14 Laser size measuring instrument 14a Projector 14b Light receiving part 14c laser light 20 PP cap 20a Narrowing part 20b screw part 20c band 21 bottles D "Throttle depth" dimension d "Thread depth" dimension

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eiji Otsuka 4-8 Konan, Minato-ku, Tokyo Fuji Electric Techno Engineering Co., Ltd. (72) Inventor Hiroshi Yamashita 4--8 Konan, Minato-ku, Tokyo Fuji Electric Techno Engineering Co., Ltd. (56) Reference JP-A-8-184416 (JP, A) JP-A-8-133393 (JP, A) JP-A-3-158707 (JP, A) JP-A 60-228933 (JP, A) JP-A-56-104207 (JP, A) JP-A-56-79205 (JP, A) Furukaihei 7-28099 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01B 11/00-11/30 B65B 57/00-57/20

Claims (3)

(57) [Claims] 1. An automatic inspecting device for obtaining quality control data by performing a tightening inspection of a PP cap having a mouth closed, for a beverage bottle product sampled from a production line. ], And an optical cap dimension measuring device for measuring each dimension of "screw depth" in a non-contact manner, and a cap opening torque measuring device for measuring the "opening torque" of the PP cap are provided on the inspection stage. The inspection device body, the introduction conveyor that aligns the inspected bottle products taken from the production line side and supplies them to the inspection stage one by one, the carry-out conveyor that discharges the inspected bottle products, and the inspection stage through the introduction conveyor. And a handling device for delivering the bottle product to be inspected to the cap dimension measuring device and cap opening torque measuring device, Sequencer for overall control of the apparatus,
And a cap dimension measuring device and a data processing means for totalizing and statistically processing the measurement data obtained by the cap opening torque measuring device are combined to construct a beverage bottle product sealed with a PP cap. Inspection device. 2. An automatic inspection device for obtaining quality control data by performing a tightening inspection of a PP cap having a drinking mouth sealed with respect to a beverage bottle product sampled from a production line, and a transmission type laser dimension measuring device, A bottle moving means for axially moving the PP cap of the bottle to be inspected from the direction orthogonal to the laser optical path with respect to the measurement region of the measuring instrument is provided, and the bottle moving means moves the cap measurement position of the bottle to be inspected to its axis. In the process of moving along the direction,
The surface dimension of the PP cap of the bottle to be inspected is continuously detected by the laser dimension measuring device, and the detected value and the cap movement amount are arithmetically processed to obtain the "narrowing depth" and "screw depth" of the PP cap. An automatic inspection device for beverage bottle products sealed with a PP cap, comprising a cap size measuring device for measuring each of the above dimensions in a non-contact manner in an inspection system. 3. The automatic inspection apparatus according to claim 2, wherein the bottle moving means has a turntable for mounting the bottle to be inspected in an upright posture, and the turntable is moved up and down to move the PP cap of the bottle product above it. It consists of a lifter that moves up and down with respect to the measurement area of the installed laser size measuring instrument. When the bottle product to be inspected is mounted on the turntable, the turntable and lifter are combined to move the PP cap circumference. An automatic inspection device for beverage bottle products sealed with a PP cap, characterized in that the "narrowing depth" and "screw depth" are measured at two measurement points set on the surface. .