JP3571326B2 - Glass bottle thickness measuring device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a thickness measuring apparatus for measuring the thickness of a glass bottle, and is particularly suitable for use in measuring the thickness of a sample bottle.
[0002]
[Prior art]
In recent years, ultra-light glass bottles having a small thickness have been actively used. Ultra-light glass bottles are not only preferable as packaging containers that are light in weight and easy for consumers to use, but also contribute to resource saving, reduction of CO2 emissions from transport trucks and prevention of global warming due to the small amount of glass used. . However, as the wall thickness becomes thinner, it is necessary to more strictly control the wall thickness during bottle molding. Generally, a molded glass bottle is subjected to a wall thickness inspection, and this inspection is performed by an automatic bottle inspection machine. The automatic bottle inspection machine emits radio waves from a probe that is close to the glass bottle, calculates the thickness of the glass bottle by measuring the amount of radio waves reflected back from the glass, and judges the quality. . By the way, in order to perform a strict inspection using an automatic bottle inspection machine, it is necessary to perform adjustment using a bottle (sample bottle) whose thickness is already known so that the pass / fail judgment is normally performed. In addition, it is necessary to confirm whether or not the pass / fail judgment has been correctly performed by measuring the wall thickness of the bottle (sample bottle) extracted at an appropriate ratio from the bottle after the inspection by the automatic bottle inspection machine is completed. .
[0003]
Conventionally, a dial thickness gauge has been used for measuring the thickness of a sample bottle. When measuring the thickness of a glass bottle with a dial thickness gauge, it is necessary to insert the measurement part of the dial thickness gauge from the mouth of the glass bottle into the interior. Unless the measurement is performed in a state where the axis of the bottle and the axis of the gauge are substantially parallel, an accurate wall thickness cannot be measured. When measuring a wide-mouthed bottle with a wide mouth, measurement can be performed with the axis of the bottle and the axis of the gauge almost parallel.For example, a bottle with a narrow mouth, such as a single-shoulder bottle, can be measured with a dial sensitivity gauge. Cannot be inserted through the mouth of the glass bottle, or even if it can be inserted inside, the axis of the bottle cannot be parallel to the axis of the gauge. In the case of such a narrow-mouthed bottle, the bottom of the bottle is broken, and a dial thickness gauge is inserted from there, and the thickness is measured.
[0004]
[Problems to be solved by the invention]
As described above, when measuring a glass bottle with a thin mouth, a complicated operation of breaking the bottom of the glass bottle is required, and the work efficiency is poor. Further, since the glass bottle whose bottom is broken cannot be put on an automatic bottle inspection machine as a sample bottle, it cannot be used for adjusting the quality of the automatic bottle inspection machine. Therefore, at present, adjustment of the pass / fail judgment of the automatic bottle inspection machine is not performed for glass bottles having a thin mouth.
[0005]
An object of the present invention is to make it possible to measure the wall thickness of a bottle having a thin mouth without breaking the bottom.
[0006]
[Means for Solving the Problems]
The present invention relates to a frame having a base portion 2, a support portion 3 erected from the base portion 2, and an overhang portion 4 extending laterally from the support portion 3,
A contact-type displacement sensor 5 fixed vertically to the tip of the overhang portion 4 with the sensor head 6 facing downward;
An inner head is fixed laterally from an intermediate portion of the support portion 3 to a lower side of the overhang portion 4, a distal end side is bent upward from the intermediate portion, and an inner head is directed upward to a distal end portion directly below the sensor head 6. 8, a support arm 7 provided with
A display unit 9 for displaying an amount of displacement of the sensor head 6,
The support arm 7 is inserted through the mouth of the glass bottle G to support the glass bottle G on the support arm 7, and the inner head 8 contacts the inner surface of the glass bottle G, and the sensor head 6 contacts the outer surface of the glass bottle G. The thickness of the glass bottle G is measured by reading the displacement amount of the sensor head 6 from the display unit 9 at that time.
[0007]
In the present invention, since the support arm has a rod shape, the support arm can be inserted into the bottle and supported by the support arm even if the bottle has a narrow mouth by appropriately selecting its thickness. Further, since the supporting arm is bent upward, as shown in FIG. 1, the glass bottle can be supported horizontally, and accurate wall thickness measurement can be performed.
[0008]
When the bending angle of the support arm (7) is 7 ° to 15 °, it is easy to set the glass bottle to the support arm for a wide range of shapes such as narrow-mouthed bottles and small bottles as well as wide-mouthed bottles. Thus, the glass bottle can be supported horizontally.
[0009]
It is preferable that the inner head makes point contact with the inner surface of the bottle, and such a shape is acceptable, but by making at least the top of the inner head spherical, the slip with the inner surface of the glass bottle is improved, and workability is good. It becomes. Also, the measurement accuracy is improved.
[0010]
The support arm 7 can be detachably attached to the column 3. By doing so, it is possible to measure various glass bottles by replacing them with a support arm having the optimal shape for the glass bottle. It becomes possible to measure with.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is an explanatory front view of a thickness measuring apparatus 1 according to an embodiment, and FIG. 2 is a front view showing a relationship between a sensor head 6 and an inner head 8.
[0012]
As shown in FIG. 1, the thickness measuring apparatus 1 has a substantially U-shape including a base 2, a column 3 erected from the base 2, and a projecting portion 4 horizontally extending horizontally from the column 3. Having a frame formed therein. A contact-type displacement sensor 5 (manufactured by Keyence, model AT3-010) is vertically fixed to the tip of the overhanging portion 4 with the sensor head 6 facing downward. The displacement sensor 5 is a well-known displacement sensor in which, when the sensor head 6 at the end moves from the reference position, the amount of movement is displayed in the display window 9a of the display unit 9 by a number in mm. A thin rod-shaped support arm 7 is detachably fixed to the lower side of the overhanging portion 4 with a screw 10 from the intermediate portion of the column 3 of the frame. The thickness (diameter) of the support arm is 16 mm on the proximal end side and 12 mm on the distal end side. The distal end side of the support arm 7 from the intermediate portion is bent upward. The bending angle is 11 °. Further, an inner head 8 is provided upward at the tip. The inner head 8 is an iron sphere, which is located immediately below the sensor head 6, and the lower end of the sensor head 6 contacts the top of the inner head 8 in a reference state (a state where the bottle is not set on the support arm 7). This state is the reference position of the sensor head (movement amount 0.00 mm).
[0013]
The glass bottle G is supported and set on the support arm 7 by inserting the support arm 7 through the mouth. At this time, the top of the inner head 8 is brought into contact with the inner surface of the glass bottle G. Since the sensor head 6 is urged downward by the bellows 6a, the lower end of the sensor head 6 comes into contact with the outer surface of the glass bottle G by the urging force. As shown in FIG. 2, since the displacement of the sensor head 6 at that time is the thickness of the glass bottle G, the thickness of the glass bottle G is actually measured by reading the displacement from the display unit 9. Can be.
[0014]
In the state shown in FIG. 1, by rotating the glass bottle G manually, the thickness of the entire circumference of the glass bottle can be measured. In addition, by moving the glass bottle in the axial direction, the thickness of the body of the glass bottle at an arbitrary position can be measured. When the outer surface of the inner head 8 is coated with a resin, the inner head is slid better with respect to the inner surface of the glass bottle, so that the operation of rotating and moving the glass bottle can be performed more easily. The measured thickness can be read directly into a personal computer. In this way, it is possible to automatically record the measured value and to automatically perform the pass / fail judgment.
[0015]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, even a bottle with a thin mouth part can measure wall thickness easily, without breaking a bottom part. In addition, since the quality of the glass bottle with a thin mouth can be adjusted for the quality judgment of the automatic bottle inspection machine, the thickness inspection by the automatic bottle inspection machine can be made more reliable.
[Brief description of the drawings]
FIG. 1 is an explanatory front view of a thickness measuring apparatus 1 according to an embodiment.
FIG. 2 is a front view showing a relationship between a sensor head 6 and an inner head 8;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Thickness measuring device 2 Base part 3 Support part 4 Projection part 5 Displacement sensor 6 Sensor head 7 Support arm 8 Inner head 9 Display part 10 Screw G glass bottle

Claims (4)

A frame having a base part (2), a column part (3) erected from the base part (2), and an overhang part (4) extending laterally from the column part (3);
A contact displacement sensor (5) fixed vertically to the tip of the overhang portion (4) with the sensor head (6) facing downward;
The middle part of the support part (3) is laterally fixed from the middle part to the lower side of the overhang part (4), the tip side is bent upward from the middle part, and the tip directly below the sensor head (6). A support arm (7) provided with an inner head (8) facing upward at the part;
A display section (9) for displaying a displacement amount of the sensor head (6),
The support arm (7) is inserted through the mouth of the glass bottle (G) to support the glass bottle (G) on the support arm (7), and the inner head (8) is placed on the inner surface of the glass bottle (G). The thickness of the glass bottle (G) is read by contacting the sensor head (6) with the outer surface of the glass bottle (G) and reading the displacement of the sensor head (6) at that time from the display unit (9). An apparatus for measuring the thickness of glass bottles, characterized in that the thickness is measured. 2. The apparatus according to claim 1, wherein the bending angle of the support arm is 7 [deg.] To 15 [deg.]. 3. The apparatus according to claim 1, wherein the inner head has a spherical shape or a part of a spherical shape. 4. The apparatus according to claim 1, wherein said support arm (7) is detachable from said support (3).

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