JP2504958Y2 - Micrometer - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a micrometer for measuring the size of the tightening portion of a beverage can.

[Prior Art] Generally, for canned beverages such as canned beer, as shown in FIG. 4, a can body B having a bottomed cylindrical shape is filled with contents and then a can lid B is tightened. . In this case, if the can main body A and the can lid B are not normally wound, the gas may escape from the inside of the can or the contents may leak, which deteriorates the quality of the beverage. . Therefore, by conventionally measuring the thickness T and the width W of the tightening portion C,
The quality of the tightening section is controlled.

By the way, when measuring the above dimensions of the winding tightening part,
Conventionally, a dedicated micrometer was used. This micrometer is configured to read the dimensions displayed on the knob by sandwiching the winding portion with a pair of measuring elements that can approach and separate from each other by rotating the knob.

In recent years, a micrometer equipped with a mechanism for outputting a measured value as a digital signal has been put on the market for the purpose of accurately and simply reading the dimension and performing computer processing of the measured dimension.

[Problems to be Solved by the Invention] However, since the above-described micrometer is equipped with a digital signal output mechanism, the weight of the micrometer is significantly increased, and the posture is not stable during measurement, resulting in an incorrect measurement. There was a problem that measured values could not be obtained.
In addition, since the knob is rotated to sandwich the measurement portion, there is a problem in that the measured value varies depending on the magnitude of the force that rotates the knob, which also reduces the reliability of the measured value.

The present invention has been made for the purpose of solving such a problem, and an object thereof is to provide a micrometer capable of greatly improving the reliability of measured values.

[Means for Solving the Problems] This invention provides a vertically elongated micrometer body with a grip portion at one end thereof, and at the other end thereof, a fixed contact member and a fixed contact member that can approach and separate from the fixed contact member. A movable contact that is movable in the longitudinal direction, a knob that moves the movable contact on the micrometer body, an elastic member that urges the movable contact toward the fixed contact, and a position of the movable contact. A sensor that detects the displacement of the movable contact and outputs an electrical signal, and a balance weight that is provided on the opposite side of the movable contact across the fixed contact are provided. Further, the movable contact is generated by the electrical signal input from the sensor. The display means for displaying the displacement of the child is provided separately from the micrometer body.

[Operation] In the micrometer having the above configuration, the object is measured by retracting the knob against the urging force of the elastic member and then sandwiching the object to be measured between the fixed contact and the movable contact. Is displayed by the display means. In particular, in the micrometer having the above structure, since the balance weight is provided on the side opposite to the side held by the hand, the weight balance is good and the micrometer is less likely to tilt during measurement. Moreover, since the object to be measured is clamped by the urging force of the elastic member, the force applied to the object to be measured is constant. Therefore, the measured value is constant regardless of the skill of the measurer, and the reliability of the inspection can be significantly improved.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a side view showing the micrometer of the embodiment.

Reference numeral 1 in FIG. 1 denotes a micrometer body. A grip portion 2 for a worker to grip is formed at an intermediate portion in the longitudinal direction of the micrometer body 1. Further, a measuring portion 3 having a larger diameter than the other end portion is formed at the tip portion of the micrometer body 1. A hollow part is formed inside the measuring part 3 and the grip part 2 along the axis, and a plunger (movable contactor) 4 slidable in the axial direction is inserted into the hollow part of the measuring part 3. . In addition, a position sensor (not shown) that detects the displacement of the plunger 4 and emits an electric signal is arranged inside the measurement unit 3, and this position sensor is connected to a cable 5 penetrating the inside of the grip unit 2. ing.
Display means (not shown) is connected to the cable 5,
The displacement of the plunger 4 is displayed by analog or digital display of the electric signal.

A knob 6 is attached to the measuring unit 3 so as to be slidable in the axial direction. The knob 6 is attached to the plunger 4 inside the measuring unit 3, whereby the
The plunger 4 can be slid by sliding the knob 6 by hand. On the other hand, an anvil (fixed contact) 7 is attached to the tip of the measuring unit 3 at a position facing the plunger 4, and the object to be measured is sandwiched between the anvil 7 and the plunger 4. There is. Also, the measuring unit 3
A spring (elastic member, not shown) for urging the plunger 4 toward the tip side is attached inside the.

Further, a balance weight (only shown in FIG. 1) 8 is attached to the most distal position of the measuring unit 3. The balance weight 8 is for relieving the weight of the micrometer from becoming uneven in front and back of the object to be measured, and is detachably attached so that its weight and shape can be appropriately changed. In the figure, reference numeral 9 is a coil spring for protecting the cable 5.

Next, when the dimension of the tightening portion of the beverage can is measured with the above-described micrometer, the knob 6 is retracted against the urging force of the elastic member, and the space between the anvil 7 and the plunger 4 is covered. Position the object to be measured, that is, the tightening portion. Next, the hand holding the knob 6 is loosened and moved to the tip side, and the winding tightening portion is sandwiched by the force of only the elastic member. In this state, the plunger 4 is separated from the anvil 7 by the thickness of the winding tightening portion, for example, and the sensor detects the distance and emits an electric signal. This electric signal is input to the display means, and is displayed as analog or digital as the actual size of the separation distance. Needless to say, this data may be input to a computer or the like for systemization.

As described above, in the micrometer having the above-described structure, the balance weight 8 is provided on the side opposite to the side held by hand, so that the weight balance is good and the micrometer is less likely to tilt during measurement. Moreover, since the object to be measured is clamped by the urging force of the elastic member, the force applied to the object to be measured is constant. Therefore, the measured value is constant regardless of the skill of the measurer, and the reliability of the inspection can be significantly improved.

Further, as compared with the conventional micrometer configured to output a digital signal, the one according to the present embodiment has a simple configuration in which a sensor (for example, an electric probe capable of detecting 1/100 mm) is incorporated. The weight is significantly reduced, and the measurement work can be performed more easily and accurately.

Next, a test for comparing measurement accuracy and workability was performed using the micrometer of the present invention and a conventional manual micrometer, and the results are shown in the table. In this test
The thickness T of the wound portion was measured at 24 points per person by three persons A, B, and C.

As is clear from this table, the total average value of the measured values was 1.442 mm in the present invention and 1.4510 mm in the conventional technique, and it was confirmed that sufficient accuracy is maintained in the present invention. Regarding the variation in the measured values depending on the measurer, while there is some difference between the expert and the newcomer in the conventional technique, there is almost no difference in the present invention. Further, regarding the time required for the measurement, the present invention takes 1 minute and 15 seconds, while the conventional technique takes 2 minutes.
It was a minute, and it was confirmed that one measurement saved 45 seconds.

The present invention is not limited to the above embodiment, and various changes can be added.

[Effects of the Invention] As described above, in the micrometer of the present invention, the grip portion is provided at one end of the vertically long micrometer body, and the fixed contact is provided at the other end of the micrometer main body. A movable contact that is movable in the longitudinal direction is provided so that it can move closer to and away from the micrometer body, a knob that moves the movable contact, an elastic member that urges the movable contact toward the fixed contact, and a movable member. A sensor that detects the displacement of the position of the contactor and outputs an electric signal, and a balance weight that is provided on the opposite side of the movable contactor with the fixed contactor interposed between them are further provided with an electric signal that is input from the sensor. Since the display means for displaying the displacement of the movable contactor is provided separately from the micrometer body, the weight balance is good and the micrometer is less likely to tilt during measurement.
Further, since the force applied to the object to be measured is constant, the measured value is constant regardless of the skill of the measurer, and the reliability of the inspection can be greatly improved. Further, since the display means wp is provided separately, the weight is significantly reduced, and the measurement work can be performed more easily and accurately.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention.
Fig. 1 is a side view of the micrometer, and Fig. 2 is that of Fig. 1.
II direction arrow view, FIG. 3 is a III direction arrow view of FIG. 1, 4
The figure is a cross-sectional view showing a winding portion of a beverage can. 1 ... Micrometer body, 2 ... Grip, 4 ... Plunger (movable contact), 6 ... Knob, 7 ... Anvil (fixed contact), 8 ... Balance weight.

Claims (1)

(57) [Scope of utility model registration request] 1. A vertically long micrometer main body is provided with a grip portion at one end thereof, and at the other end thereof, a fixed contact and a movable movable member in the longitudinal direction so as to be able to approach and separate from the fixed contact. A contact is provided, and a knob for moving the movable contact, a resilient member for urging the movable contact toward the fixed contact, and an electric signal for detecting the displacement of the position of the movable contact are provided on the micrometer body. And a balance weight provided on the opposite side of the movable contact with the fixed contact interposed therebetween, and a display means for displaying the displacement of the movable contact by an electric signal input from the sensor. Is provided separately from the main body of the micrometer.