JP2011174708A - Hardness measuring instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem with a conventional hardness measuring instrument, wherein a method for entrusting measurement to the Chemical Substance Evaluation Research Mechanism Foundation has been performed because a function for measuring the hardness of soft sponge or the like is insufficient, however, in this method, many days are taken until a measuring result is sent and cost is required. <P>SOLUTION: This hardness measuring instrument has a pressure-electric signal output circuit for displacing voltage by the pressure receiving corresponding to the hardness of matter to be measured and has a structure for converting the electric signal taken out of the electric signal output circuit to a digital signal to digitally display the same. Accordingly, an individual difference by measurement can be eliminated. Also, a battery is mounted in the measuring instrument as the power supply of the electric signal output circuit and an electric signal conversion circuit, so that the power supply from the outside becomes unnecessary. As a result, the measuring instrument is reduced in size and weight to be made handy so as to be carried by one hand and can easily perform not only downward measurement but also the measurement of a vertical surface or upward measurement. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a hardness measuring device having a pressure-electric signal output circuit that outputs the hardness of an object as an electric signal. More specifically, the present invention realizes a reduction in size and weight and is somewhat strong from a material with a fine repulsive force. The present invention relates to a hardness measurement apparatus having a mechanism that enables measurement even in measurement of repulsive material.

Several proposals have been made for a hardness meter that measures the repulsive force of an object. For example, JP-A-20
There is a “hardness meter” described in Japanese Patent Application No. 06-65564, but they are not sufficient for measuring the hardness of soft sponges, etc., and on-site measurements such as soft sponges that require accuracy are required. Trying to do it is not easy.

JP 2006-65564 A

The present invention solves such problems, and can measure the hardness of a relatively hard material from a material such as a soft sponge quickly and with high precision in a short time on site. A measuring device having a mechanism capable of displaying a measurement result digitally, which is small, light and easy to move, can be obtained.

In order to achieve the above object, the hardness detection device according to claim 1 of the present invention is configured such that the load cell 1 serving as the sensor portion is fixed to the mounting base 2 with the load cell mounting screw 3 and is centered on the load cell 1. Place the pressure detection transmission rod 4 with the pressure detection auxiliary plate 5 attached to the tip so as to overlap the line extending in the vertical direction of the load cell 1 from the load detection unit 1a positioned, and slide it without detaching from the line. The holder 6 is fixed to a holder 7, and the holder 7 is extended along the pressure detection transmission rod 4 to the mounting base 2. 2 (Fig. 2), these load cell 1,
A detection device comprising a mounting base 2, a load cell mounting screw 3, a pressure detection transmission rod 4, a pressure detection auxiliary plate 5, a holder 6, and a holder 7.

The hardness measuring device according to claim 2 moves the detecting device 8 within the measuring device main body 9 and protrudes the pressure detection auxiliary plate 5 and the pressure detection transmission rod 4 located at the tip thereof to the outside. Object 2
On the other hand, when the measurement is not performed, the pressure detection auxiliary plate 5 that is structurally mechanically weak against collision, drop, etc. and is expected to be deformed, as well as,
For the purpose of protecting the pressure detection transmission rod 4, it was possible to obtain a measuring device having a mechanism housed in the measuring device main body 9.

The hardness measuring apparatus according to claim 3 is a method for measuring the repulsive force of the object to be measured 25 having different hardness, and the pressure detection auxiliary plate 5 and the pressure detection transmission rod on the object to be measured 25. 4 is pushed a certain distance, the repulsive force is taken out as a pressure displacement, the pressure displacement is converted into an electrical signal, and the value is read, the pressure detection auxiliary plate 5 and the pressure detection from the measuring device body 9 It is necessary to make the distance at which the transmission rod 4 protrudes constant.
By providing a feed stopper 10 at the destination of the detection device 8 that moves inside, the detection device 8 is applied to the feed stopper 10, and the movement of the detection device 8 is stopped, the pressure detection auxiliary plate 5, and
The movement of the pressure detection transmission rod 4 also stops, the pressure detection auxiliary plate 5 and the distance from which the pressure detection transmission rod 4 protrudes can be set to a constant value, and the measurement device has a structure for measuring under the same conditions. I was able to.

The hardness measuring device according to claim 4 is a detection device that moves in the measuring device main body 9 by mounting the adjusting plate 12 between the feed stopper 10 in the measuring device main body 9 and the holder 7 of the detecting device 8. The holder 7 of the apparatus 8 hits the adjustment plate 12 mounted in front of the feed stopper 10, and the adjustment plate 1
2 is stopped in front of the feed stopper 10, so that the pressure detection auxiliary plate 5 interlocked with the holder 7 and the distance at which the pressure detection transmission rod 4 protrudes from the measuring device main body 9 to the outside is also adjusted. It is possible to measure a wide range of measurement objects, from soft materials to hard materials, by shortening the thickness and pushing a short distance even for hard objects that are difficult to push deeply. It was possible to make a measuring device.

The hardness measuring device according to claim 5 requires a power source for moving the detecting device 8 in the main body axial direction within the measuring device main body 9. In this apparatus, the power source is used as the measuring device main body 9. The gripping force of the hand holding the hand is obtained from the connecting rod 15, and the spring 16 is inserted into a portion where the connecting rod 15 is in contact with the detection device 8, and the impact when gripping and the thickness of the adjusting plate 12 are determined. It was possible to obtain a measuring apparatus having a mechanism for absorbing.

The hardness measurement device according to claim 6 performs measurement by causing the pressure detection auxiliary plate 5 and the pressure detection transmission rod 4 to protrude from the measurement device main body 9, but at the time of measurement, the pressure detection auxiliary plate 5 and It is required to make the distance for pushing the pressure detection transmission rod 4 into the object to be measured 25 constant and stable. Therefore, the pressure detection auxiliary plate 5 and the peripheral body from which the pressure detection transmission rod 4 protrudes are as follows. By making the plane perpendicular to the pressure detection transmission rod 4 and bringing the plane 14 into contact with the object to be measured 25, the surface where the plane 14 and the object to be measured 25 are in contact is the reference plane, that is, this plane is zero. As
The pressure detection auxiliary plate 5 and the pressure detection transmission rod 4 are pushed by a certain distance from the surface, and the repulsive force received at that time is transmitted from the pressure detection auxiliary plate 5 to the load cell 1 through the pressure detection transmission rod 3, and an electric signal is transmitted from the load cell 1. As a result, it is possible to eliminate individual differences due to measurement by converting the electrical signal into a hardness value and displaying it digitally, and therefore, accurate measurement is possible, and the measurement method is also Not only the measurement by the downward direction but also the measurement of the vertical plane or the measurement by the upward direction can be easily performed, and the measurement device can be obtained regardless of the measurement place and the measurement method.

The hardness measuring device according to claim 7 is a measuring device capable of performing stable measurement by holding the object to be measured 25 on the flat surface 14 with a fixing plate 21 and fixing the object to be measured, so that the object does not move. We were able to.
In addition, when it is difficult to press the measurement object 25 on the flat surface 14 with the fixing plate 21, it is possible to perform measurement by removing the fixing plate 21 and bringing only the flat surface 14 into contact with the measurement object 25.

The hardness measuring apparatus according to claim 8 is provided with a contact switch 24a at a position where the object to be measured comes into contact with the surface of the main body, and has a mechanism that is switched on when the object to be measured comes into contact with the surface of the main body during measurement. Thus, it was possible to provide a hardness measuring device characterized in that it was possible to make a circuit that did not forget to turn off the power.

The hardness measuring apparatus according to claim 9 is configured such that when the detecting device 8 reaches the feed stopper 10 and reaches a position where measurement can be started, the feed switch 24b is turned to a place where the feed switch 24b is turned on.
When the connecting rod lever 15b is gripped at the time of measurement, the feed switch 24b is turned on via the connecting rod 15, the pressure spring 16, and the detecting device 8, so that the detecting device 8 can measure the position. It was possible to obtain a measuring device characterized by a mechanism that switches on when reaching the position.
This circuit is a circuit that can be the same power switch as described above, and is a circuit that takes care not to forget to turn off the power. The contact switch 24a and the feed switch 24b are connected in series, and both switches are turned on. For the first time, it is possible to provide a circuit in which power is supplied to the load cell 1 and the control board 17 to start measurement.

In the hardness measuring apparatus according to the tenth aspect, although the extracted electric signal is a voltage proportional to the hardness, if it is displayed as it is, the hardness is not displayed. In view of this, it was possible to obtain a measuring device characterized by having a mechanism for converting the signal into the hardness value of the object 25 to be measured by the control board 17 and displaying it digitally.

The hardness measuring apparatus according to claim 11 is a power source for the load cell 1 and the control board 17.
Since the measuring device main body 9 is equipped with a battery 18 and is supplied with power from the battery 18,
An external power supply is not required, and thus a compact and lightweight hardness measuring device that can be carried with one hand has been achieved.

According to the hardness meter of the present invention, the following effects or advantages can be obtained.
1. It is possible to quickly and accurately measure the hardness of a relatively hard material from a material such as a soft sponge in a short time on site.
2. Since the battery as a power source is built in the measuring instrument body, the measuring device is small and lightweight, can be carried with one hand, and does not take up any place.
3. The measurement result obtained by the electrical signal output circuit is converted into a hardness value by the electrical signal conversion circuit, and the obtained value is displayed digitally, so there is no individual difference due to reading.
4 By inserting an adjusting plate between the feed stopper and holder of the measuring instrument body to shorten the distance pushed into the object to be measured, the hardness of the object to be measured made of a hard material can be measured.
5. A measurement apparatus capable of performing stable measurement can be obtained by sandwiching and fixing an object to be measured with a fixed plate on the plane of the measurement apparatus main body and performing measurement without moving.

The perspective view of the load cell 1. FIG. Sectional drawing of the detection apparatus 8. FIG. The perspective view of the inside and exterior which removed the cover of the measuring device 9. FIG.

1 and 2, the load cell 1 is mounted on the mounting base 2 and the load cell mounting screw 3
The pressure detection transmission rod 4 with the pressure detection auxiliary plate 5 attached to the tip is placed so as to overlap the line extending in the vertical direction of the load cell 1 from the load detection unit 1a located at the center of the load cell 1, The holder 6 is held by a holder 6 provided with a gap that can be slid without being removed from the line, and the holder 6 is fixed to a holder 7, and the holder 7 is attached to the pressure detection transmission rod 4. A part extending along the mounting base 2 and fixed to the mounting base 2 is defined as a detection device 8.

In FIG. 3, the connecting rod lever 15b of the measuring apparatus main body 9 has a connecting rod fulcrum 1 at the approximate center thereof.
When the connecting rod lever 15b is gripped by a part of the connecting rod 15 having 5a, the applied force is reversed by the connecting rod fulcrum 15a and directed forward, and is detected via the pressure spring 16. The detection device 8 is not rotated by the action of the detection device rotation stopper 26 transmitted to the rear portion of the device 8,
It will be a force to push forward.

In FIG. 3, when the above-described force is applied, the detection device 8 moves before being pushed through a space that can move back and forth without rattling in the measurement device main body 9, and eventually the detection device 8. Hits the feed stopper 10 and stops its movement.

At this time, the pressure detection auxiliary plate 5 and the pressure detection transmission rod 4 protrude from the front surface of the measuring device main body 9, but the protruding distance is the length of the holder 7, the position of the feed stopper 10, the pressure detection transmission rod. It is determined by the length of 4.
Here, by setting the length of the holder 7, the position of the feed stopper 10, and the length of the pressure detection transmission rod 4, the distance from which the pressure detection auxiliary plate 5 and the pressure detection transmission rod 4 protrude from the measuring device body 9 is constant. It can be.

Further, an adjustment plate 12 is mounted in front of the feed stopper 10 so that the feed stopper and the detection device 8
By inserting between the holders 7 and stopping the holder 7 by the thickness of the adjusting plate,
By shortening the distance that the pressure detection transmission rod 4 and the pressure detection auxiliary plate 5 that are linked to the holder 7 protrude, it is possible to measure even a hard object 25 that is difficult to insert deeply.
At that time, it is necessary to change the conversion rate that has been executed for the output voltage from the detection device 8. Therefore, when the changeover switch is attached to the outer surface of the measuring apparatus main body 9 and the adjustment plate 12 is slid, the adjustment plate 12 is switched or when the adjustment plate 12 is slid, the adjustment plate 1
2 is equipped with a switch that operates in conjunction with the control base 17 by turning the switch ON and OFF
Change the conversion rate.

Here, in order to make the pressure detection auxiliary plate 5 and the pressure detection transmission rod 4 pushed into the measurement object 25 constant and stable, the pressure detection auxiliary plate 5 and the pressure detection transmission rod 4 protrude. The surrounding main body is a plane perpendicular to the pressure detection transmission rod 4 and the plane 14 is brought into contact with the object to be measured 25, so that the surface contacting the plane 14 and the object to be measured 25 is a reference plane in measurement. That is, with this surface set to zero, the pressure detection auxiliary plate 5 and the pressure detection transmission rod 4 are pushed from that surface for a certain distance, and the repulsive force received at that time is transferred from the pressure detection auxiliary plate 5 to the load cell 1 via the pressure detection transmission rod 3. The load cell 1 takes it out as an electrical signal, converts the electrical signal into a hardness value, and displays it digitally, thereby eliminating individual differences due to measurement. Possible Made,

Then, the object to be measured 25 brought into contact with the flat surface 14 is slid by the slidable fixing plate mounting rod 22 to which the fixing plate 21 is attached, and the object to be measured 25 is pulled toward the flat surface 14 by the fixing plate 21 and fixed. Further, the fixing plate fixing rod set screw 23 is tightened to perform measurement while maintaining the state.

At this time, the contact switch 24a is pushed by the object to be measured 25 and is turned on.
When b is grasped, the feed switch 24b passes through the connecting rod lever 15, the pressure spring 16, and the detection device 8.
Will also turn ON. Only when both the contact switch 24a and the feed switch 24b are turned on, power is supplied to the load cell 1 and the control board 17 and measurement is performed.
However, when it is difficult to sandwich the object to be measured 25 between the flat surface 14 and the fixing plate 21, the fixing plate attaching rod set screw 23 is loosened, the fixing plate 21 and the fixing plate attaching rod 22 are removed, and the flat surface 1.
It is also possible to perform measurement by pressing 4.
The above is the form at the time of measurement.

In the standby mode in which the measurement is not performed, when the force for grasping the connecting rod lever 15b of the connecting rod 15 is gradually relaxed, the contact switch 24a,
Then, the feed switch 24b is turned off, the power is turned off, and the detection device 8 moves backward, and the pressure detection auxiliary plate 5 and the pressure detection transmission rod 4 are accommodated in the measuring device main body 9 in due course. The detection device 8 returns and stops at the stopper 11.
At this time, it is necessary to keep the tip of the pressure detection auxiliary plate 5 and the pressure detection transmission rod 4 housed in the measurement device main body 9 so that the tip of the measurement device main body 9 is not exposed to the outside regardless of the state of the measurement device main body 9. is there.

Therefore, as a method of retaining the stored pressure detection auxiliary plate 5 and the tip of the pressure detection transmission rod 4 so as not to go outside, first, the detection device return push spring 19 is placed in front of the detection device 8 and the measurement device. It is inserted between the main body 9 and the detection device 8 is pushed backward, or the detection device return pulling spring 20 is inserted between the detection device 8 and the measurement device main body 9 to pull the detection device 8 backward. There is either way.

As the load cell 1 to be used, a model in which the load cell load detecting portion 1a is threaded is used, and the load cell 1 and the pressure detection transmission rod 4 can be easily connected.

The analog signal voltage generated from the load cell 1 generates a voltage proportional to the hardness from 0 volt to a maximum of about 1 millivolt. If the voltage value from 0 volt to the maximum of about 1 millivolt is displayed as it is, the hardness of the analog signal voltage is It is necessary to convert the generated voltage from 0 volt generated there to a maximum of about 1 millivolt to the display as hardness, which is not displayed.
Therefore, the voltage generated from the load cell 1 is converted into a digital signal of hardness display by the electronic circuit of the control board 17 and displayed on the display panel on the upper surface of the control board 17, and the object to be measured is measured from the opening of the measuring device body 9. It can be displayed and read as a hardness of 25, and individual differences due to misreading can be eliminated by displaying digitally.

Next, the power source of the load cell 1 and the control board 17 is not a power source from the outside. Instead of using a power source from the outside, a battery 18 is provided in the measuring device main body 9 to supply a power source. ,
A handy device that can be carried with one hand has been realized, and it has become a measuring device that does not choose the person to measure, the measurement location, and the measurement direction.

DESCRIPTION OF SYMBOLS 1 Load cell 1a Load cell load detection part 2 Mounting stand 3 Load cell attachment screw 4 Pressure detection transmission rod 5 Pressure detection auxiliary plate 6 Holder 7 Holder 8 Detection device 9 Measuring device main body 10 Feed stopper 11 Return stopper 12 Adjustment plate 13 Adjustment plate fixing screw 14 plane 15 connecting rod 15a connecting rod fulcrum 15b connecting rod lever 16 pressure spring 17 control base 18 battery 19 detecting device return push spring 20 detecting device return pulling spring 21 fixing plate 22 fixing plate mounting rod 23 fixing plate mounting rod fixing screw 24a Contact switch 24b Feed switch 25 Object 26 Detecting device rotation stop

Claims (11)

The load cell 1 is fixed to the mounting base 2, and a pressure detection transmission rod 4 on which a pressure detection auxiliary plate 5 can be attached to the tip of the load cell 1 on a line extending in the vertical direction from the load detection portion 1 a of the load cell 1 6, and the holder 6 is fixed to the holder 7. Further, the holder 7 extends to the mounting base 2 along the pressure detection transmission rod 4 and is fixed to the mounting base 2. In the hardness measuring device constituted by the detection device according to claim 1, the detection device 8 is moved during measurement, and the pressure detection auxiliary plate 5 and the pressure detection transmission rod 4 are moved outside the measurement device main body 9. When the measurement is performed while projecting, the pressure detection auxiliary plate 5 and the pressure detection transmission rod 4 are housed in the measuring device main body 9 and the pressure detection auxiliary plate 5 and the pressure detection are performed. A measuring device having a structure for protecting the transmission rod 4. In the hardness measuring device constituted by the detection device according to claim 1, when moving the detection device 8 toward the outside of the measurement device main body 9 during measurement, the pressure detection auxiliary plate 5 and the pressure detection transmission rod 4
In order to make the distance protruding outside the measuring device main body 9 constant, the feed stopper 10
The movement of the detection device 8 is stopped by applying the detection device 8 to the feed stopper 10, and the protruding distance of the pressure detection auxiliary plate 5 and the pressure detection transmission rod 4 is set to a constant value. A measuring device characterized by that. The hardness measuring device according to claim 2 and claim 3, wherein an adjustment plate 12 is inserted between the feed stopper 10 in the measuring device main body 9 and the detecting device 8 to move the detecting device 8 during measurement. , I.e., by shortening the protruding distance of the pressure detection auxiliary plate 5 and the pressure detection transmission rod 4 to enable measurement even for a hard object 25 that is difficult to push deeply. Measuring device. The hardness measuring device according to claim 2, claim 3, and claim 4, wherein a hand holding the measuring device main body 9 is gripped as a power source for moving the detecting device 8 in the measuring device main body 9 in the axial direction of the main body. A mechanism is provided that obtains force from the connecting rod 15 and absorbs an impact when grasped by inserting a spring 16 into a portion where the connecting rod 15 and the detection device 8 are in contact with each other and the thickness of the adjusting plate 12. Measuring device characterized by that. In the hardness measuring device according to claim 2 and claim 3, the main body part that contacts the object to be measured 25 is a flat surface, and the pressure detection transmission rod 4 is vertically installed at the center of the flat surface 14, and at the time of measurement, A hardness measuring apparatus that measures the protruding pressure detection transmission rod 4 and the surrounding flat surface 14 in contact with an object 25 to be measured. In the hardness measuring device according to claim 6, from the measuring device main body 9, the flat plate 14, the pressure detection transmission rod 4, and the fixing plate 21 protruding further outward than the pressure detection auxiliary plate 5 are moved,
A hardness measuring apparatus characterized in that an object to be measured 25 is sandwiched between a flat surface 14 and fixed so as not to move. A hardness measuring apparatus comprising a contact switch on a surface of a main body, and having a mechanism for performing measurement by turning on the contact switch when an object to be measured contacts the main body of the measuring apparatus. 4. The hardness measuring device according to claim 2 and claim 3, further comprising a mechanism for performing measurement by turning on the feed switch 24b when the holder 8 reaches the foremost part and measurement is possible. Hardness measuring device characterized by that. In measuring the hardness of an object to be measured, it has a control board equipped with a function capable of converting an electric signal taken out from a load cell into a signal representing the hardness, and is a digital display. Measuring device. An apparatus for measuring the hardness of an object to be measured, characterized in that an external power supply is not required by supplying power to electrical components in the apparatus with a battery.

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