JP3135877U - Anomaly detection device for male screws - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a male screw abnormality detecting device capable of inspecting a screw abnormality with a simple operation at low cost.
SOLUTION: A pair of opposing inspection parts 2 and 3 having a shape obtained by dividing a metal fitting with a normal female screw threadedly engaged with a normal male screw, and the inspection part are moved relative to each other so as to be separated from each other. And moving means 4 for moving the test screw to a close state to the male screw to be inspected, and measuring means 5 for measuring the distance between the two inspection parts.
[Selection] Figure 1

Description

  The present invention relates to an abnormality detection device for male screws.

  Various instruments are often formed by combining two or more parts and joining them with a fastening material, and representative examples of the fastening material include screws such as screws and bolts.

These screws hold the fastening strength by screwing the screw thread, but if there is an abnormality such as crushing in this screw thread, it becomes impossible to fasten or difficult to fasten, Even if it can be fastened, it may cause insufficient strength and lead to a major accident due to damage.
Naturally, it is ideal to eliminate this thread abnormality in the manufacturing process. However, it is inevitable that a very small number of abnormalities occur in a large number, and it is unavoidable to miss them. In view of this, most manufacturers are conducting strict inspections of thread anomalies in the final inspection process.
In order to inspect the abnormality of this screw, it is possible to make a judgment by taking a picture with a camera and observing the image, measuring the amount of reflected light such as laser light or changes in magnetic force, or measuring with a screw gauge. The inspection method is adopted. However, in these methods, since the screws are round bar-like, in order to inspect the outer periphery over 360 °, it is necessary to arrange a large number of inspection devices around the screw or to inspect while rotating the screw. In other words, the measurement of a single screw requires a lot of work time and labor, the cost is high, and it is not suitable for on-line measurement.

  The present invention has been made in view of the present situation, and an object of the present invention is to provide a male screw abnormality detecting device capable of inspecting a screw abnormality with a simple operation at low cost.

  The present invention achieves the above-described object, and a pair of opposing inspection parts having a shape obtained by dividing a metal fitting with a normal female screw threadedly engaged with normal male screws, and the inspection part relatively Anomaly detection of male screws, characterized by comprising moving means for moving from the separated position until the male screws to be inspected are brought into close contact with each other and measuring means for measuring the distance between the two inspection parts. Device.

  The moving means is preferably moved manually or by a driving force along a traveling path or a guide, and the measuring device measures the distance optically, electrically and mechanically and displays a numerical value. It is desirable to make it.

  According to the male screw abnormality detecting device of the present invention, it is possible to inspect the abnormality of the screw with a simple operation at low cost.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, the abnormality detection device for male screws of the present invention will be described.
In FIG. 1, reference numeral 1 denotes a male screw abnormality detection device 1 according to the present invention. The male screw abnormality detection device 1 mainly moves a pair of opposing inspection units 2 and 3 and the inspection unit relatively. The moving unit 4 moves from the separated position until the male screw to be inspected is brought into close contact with the measuring unit 5 and the measuring unit 5 that measures the distance between the inspection units 2 and 3.

  The inspection units 2 and 3 have a shape in which a metal fitting screwed with a normal female screw that is screwed with a normal male screw to be inspected is divided. For example, a normal female screw that is screwed with a normal male screw to be inspected However, the present invention is not limited to this. For example, in addition to dividing into half, the shape may be one-third opposite.

  The moving unit 4 is a moving unit that relatively moves the inspection units 2 and 3 and moves the inspection units 2 and 3 to a close state to the male screws to be inspected from the separated position. As a means for relatively moving the inspection units 2 and 3, one inspection unit 2 can be fixed and the other inspection unit 3 can be moved. It is also possible to make it. The moving means is provided with a traveling path, a guide, and the like so as to be accurately movable in a predetermined direction, and it is desirable that the moving means be moved along this by manual or a driving force such as a spring, gravity, and power.

  The measuring means 5 measures the distance between the two inspection parts 2 and 3. Of course, the interval between the two inspection units 2 and 3 may be directly measured, or a bar that is easy to measure may be attached to both the inspection units 2 and 3, and the interval between the bars may be measured. It is desirable to measure the distance between the two optically, for example, by using means that can measure the distance between eddy currents, microswitches, lasers, etc., and display the numerical value. It is possible to adopt a method.

  Either one of the inspection units 2 and 3 of the male screw abnormality detector of the present invention is fixed, and the male screw to be inspected is inserted so as to be screwed into the female screw of the inspection unit. 3 is moved along the road and brought into close contact with each other, and the interval between the inspection units 2 and 3 is detected. If the interval does not exist or is within an allowable range, the male screw to be inspected is determined to be a good product. If the interval at the time of inspection is outside the allowable range, the male threads to be inspected can be determined to be defective. It should be noted that both the inspection units 2 and 3 can be simultaneously moved toward the male screw and inspected, and can be separated from the male screw after the inspection. When this means is adopted, it is possible to inspect a plurality of male screws to be inspected by sequentially moving them by various moving means such as a turntable.

  It is the schematic which shows an example of the abnormality detection apparatus of the external thread of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Male screw abnormality detection device 2, 3 Inspection unit 4 Moving means 5 Measuring means

Claims (3)

  A pair of opposing inspection parts having a shape obtained by dividing a metal fitting with a normal female screw threadedly engaged with a normal male screw, and the inspection part are moved relative to each other to move the male screw to be inspected from the separated position. An anomaly detection device for male screws, characterized by comprising a moving means for moving until close contact and a measuring means for measuring the interval between the two inspection parts.   2. The male screw abnormality detecting device according to claim 1, wherein the moving means is moved manually or by a driving force along a traveling path or a guide.   The male screw abnormality detecting device according to claim 1, wherein the measuring device optically, electrically, and mechanically measures the interval and displays a numerical value.

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