JP2001343218A - Apparatus for measuring length of pestle for tableting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measuring apparatus which can automatically, highly accurately and efficiently measure a length of mallets for hammering locks having various shapes of end faces. SOLUTION: A laser displacement sensor is slidably set by a linear motor to a guide rail.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch used for tableting a tablet, and more particularly to a measuring device suitable for measuring the length of a punch having a special end face shape.

[0002]

2. Description of the Related Art It is necessary to measure the length of a tableting punch in order to control the standards of tablets to be tableted. Conventionally, a manual measuring device such as a micrometer or a dial gauge is used for such measurement. Have been. However, when a punch having a special end face shape used for tableting a tablet such as a donut-shaped tablet is to be measured, such a conventional manual measuring device uses an end face of the punch. There is a problem that the most convex portion or the most concave portion has to be measured at the one point or at most two points, and the actual situation is that the accuracy is naturally low and the measurement efficiency is low.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems and the actual situation, and even if a punch having a special end face shape is used, the length of the punch can be adjusted with high precision and efficiency. It is an object to provide a measuring device capable of measuring.

[0004]

The object of the present invention has been attained by the present invention in which a length measuring device for a tableting punch is constructed by mounting a laser displacement sensor on a guide rail so as to be slidable by a linear motor. Things.

Here, it is desirable that the laser displacement sensor further includes a graphic analog controller and data processing means, since it obtains a more accurate measurement result and has excellent reproducibility.

[0006]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic structural explanatory view of a tablet punch measuring device according to the present invention. In FIG. 1, reference numeral 10 denotes a laser displacement sensor which is slidably mounted on a guide rail 30 by the operation of a linear motor 20. Here, the driving force of the linear motor 20 is transmitted to the laser displacement sensor 10 via transmission means such as a worm gear, and the laser displacement sensor 10 slides along the guide rail 30 at a constant speed of, for example, 19 mm / s. In the case of a punch having a diameter of 9 mm, for example, 4,737 data can be obtained. Incidentally, the moving speed of the laser displacement sensor 10 is
Is appropriately controlled by setting the number of rotations.

[0008] A graphic analog controller 50 is connected to the laser displacement sensor 10 via an amplifier unit 40 via a line.
The analog signal obtained as the distance information to the tip surface of the punch is input to the graphic analog controller 50 via the amplifier unit 40.

Graphic analog controller 50
Converts the input analog signal into a digital signal at an interval of, for example, 100 μs (10,000 times / second), and displays the digital signal on the display unit 6 of the data processing computer 60 connected to the line.
0a is output and displayed as the end face shape of the punch as shown in FIG. The point to be measured is set as an area on the displayed end face shape of the punch, and the measurement position can be arbitrarily set by obtaining a peak value and a bottom value in the area. In addition, the data is output and displayed on the display unit 60a as a specific numerical value of the length of the punch by a comparison operation with the data of the standard punch previously measured and input by the data processing computer 60 by the data processing computer 60. .

In order to measure the length of a tableting punch using the measuring apparatus of the present invention according to this embodiment, as shown in FIG. 1, a laser displacement sensor sliding on a guide rail 30 is used. An appropriate number (three in the illustrated example) of the punches 70 are arranged within the moving range of ten, and the tail ends of the punches are aligned at a fixed distance from the guide rails 30. If the laser displacement sensor 10 is operated and slid by the linear motor 20 while operating, the distance information to each end face of the punch 70 can be sequentially obtained at a plurality of points, for example, at four points as shown in FIG. . In other words, the length of each punch can be measured at four points.

[0011]

According to the present invention, the length of the punch for tableting, which has been difficult in the past, can be automatically measured. As a result, even if the end face has a special shape, there is no camera shake unlike the manual method. ,
Measurement data can be obtained with high accuracy. In addition, since a plurality of punches can be continuously measured by the automatic sliding of the laser displacement sensor 10, extremely efficient measurement processing can be performed. Furthermore, by using the graphic analog controller 50 and the data processing computer 60 together, the measurement data can be obtained and processed at a plurality of points such as four points for one punch, so that the measurement results with higher accuracy can be obtained. Is obtained, and the diameter of the end face of the punch can be determined from the moving speed of the laser displacement sensor 10. Therefore, the use of the measurement apparatus of the present invention enables effective management of tablet standards.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating the configuration of a measurement apparatus according to the present invention.

FIG. 2 is an explanatory diagram showing a measurement example.

[Explanation of symbols]

 10: Laser displacement sensor 20: Linear motor 30: Guide rail 40: Amplifier unit 50: Graphic analog controller 60: Data processing computer 70: Tablet punch

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenji Takahashi 200-5, Motosanrizuka, Narita-shi, Chiba Pref. 103 F-term (reference) 2F065 AA22 FF09 FF11 GG06 JJ16 MM07 PP02 PP22 QQ03

Claims (2)

[Claims] 1. A tableting punch length measuring device, wherein a laser displacement sensor is slidably attached to a guide rail by a linear motor. 2. A tableting punch length measuring device, wherein the laser displacement sensor comprises a graphic analog controller and data processing means.