JP3058779B2 - Writing state measuring method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing state measuring method and apparatus for quantitatively and objectively measuring the writing state of various writing instruments.

[0002]

2. Description of the Related Art In the field of writing instruments, various writing instruments have recently been developed and used in accordance with diversification of writing purposes.

[0003] With the diversification of such writing instruments, there has been a need to know the writing state of each writing instrument, for example, in order to develop a writing instrument having an optimum writing state for writing purposes.

A typical example of the writing state to be known is a writing friction force at the time of writing (a heavy writing felt by a hand,
Light writing, etc.), and the smoothness of writing (whether it can be written smoothly, is rough, or is tight, etc.).

Conventionally, in order to know such a writing state, an inspector actually writes the writing implement manually and judges the writing frictional force and the smoothness of the writing at the time of writing based on the sensitivity. I was

[0006] Such a conventional method is extremely qualitative and subjective, and cannot be used as a method for quantitatively and objectively ascertaining the written state.

[0007]

Therefore, conventionally, there has been proposed a method of measuring the dynamic friction coefficient of a writing instrument while the writing instrument is in contact with the rotating drum and writing in one direction is continued.

However, in this conventional method,
In order to measure only the dynamic friction coefficient of a writing instrument,
Only a part of the writing state described above can be grasped,
The writing state of the writing instrument cannot be truly grasped, and the measurement lacks precision.

[0009] The present invention has been made in view of these points, it is possible to quantitatively and objectively know the writing state of various writing instruments, and to measure the good writing state of each writing instrument By comparing the writing conditions, it is possible to accurately and easily elucidate defective components of a writing instrument, and also to measure a writing state that can be used for sampling inspection of a writing instrument production line, quality control, and the like. It is intended to provide a method and apparatus.

[0010]

According to a first aspect of the present invention, there is provided a method for measuring a writing state according to the present invention, which is applied to a writing implement during a writing operation in which a recording medium and a writing implement are relatively moved. Simultaneously measure each time-dependent pattern of the friction state and the vibration state to be performed, and observe the combined friction state and the vibration state obtained by the measurement to observe the writing friction force and the writing force during the writing operation of the writing implement .
It is characterized in that the writing state of the writing implement is measured by detecting a writing state composed of smoothness .

According to a second aspect of the present invention, in the writing state measuring method according to the first aspect, the frictional state applied to the writing instrument is measured by measuring a frictional force. The vibration state applied to the writing instrument is measured by measuring vibration acceleration and / or acoustic emission.

According to a third aspect of the present invention, there is provided the writing state measuring method according to the first or second aspect, wherein the measuring data is stored and the measured data is stored in accordance with a predetermined display condition. Is displayed.

According to a fourth aspect of the present invention, there is provided a writing state measuring device, wherein a writing operation applying means for performing a writing operation by moving the writing implement relative to a recording medium, and a friction state applied to the writing implement during the writing operation. a friction state measurement means for measuring, before
And a vibration state measuring means for measuring the vibration state to be imparted to the writing implement in serial writing operation, friction state and vibration conditions imparted to the writing implement in the writing operation by the friction state measuring means and the vibration state measurement means While simultaneously measuring each temporal pattern of, simultaneously observe the friction state and the vibration state obtained by the measurement, detect the writing state consisting of the writing friction force and the smoothness of writing during the writing operation of the writing instrument It is characterized by doing.

According to a fifth aspect of the present invention, there is provided the writing state measuring device according to the fourth aspect, wherein the friction state measuring means is formed by a minute load sensor for measuring a frictional force. The state measuring means is measured by a vibration acceleration sensor that measures vibration acceleration and / or an acoustic emission that forms acoustic emission.

According to a sixth aspect of the present invention, there is provided the writing state measuring device according to the fourth or fifth aspect, wherein the data storage means for storing the measured data, Data display means for displaying data in accordance with display conditions.

[0016]

By operating the writing state measuring device of the present invention in accordance with the writing state measuring method of the present invention, the writing state of various writing instruments can be quantitatively and objectively known.

That is, by simultaneously measuring the frictional state and the vibration state applied to the writing implement during the writing operation, the writing frictional force and the smoothness of the writing which are the main elements of the writing implement of the writing implement can be measured. .

From the measurement results, it is possible to recognize a writing state pattern characteristic of each writing implement, and it is possible to more appropriately determine the writing state.

More specifically, the writing state of each writing implement obtained by the method of the present invention is reproducible in itself, becomes unique data for each writing implement, and functions similarly to a human fingerprint or voiceprint. It is a pen mark for writing instruments. As described above, according to the present invention, it is possible to measure the pen mark of each writing instrument and store it.

Therefore, by comparing the measured data with the good writing condition of each writing implement, it is possible to accurately and easily clarify a defective component of the writing implement, and to further improve the production line of the writing implement. Sampling inspection, quality control, and the like.

By storing measurement data, time,
It is possible to document measurement data that goes beyond the space and to use it effectively.

[0022]

FIG. 1 to FIG. 16 show an embodiment of the present invention.

First, the principle of the present invention will be described with reference to FIGS.

FIG. 1 schematically shows a writing state measuring apparatus according to the present invention, and FIG. 2 shows a detecting section and a data processing section.

In FIG. 1, reference numeral 1 denotes a recording medium 2 such as paper.
Is a writing table fixedly held on the upper surface. In this embodiment, the writing table is movable in the horizontal direction on the paper and in the vertical direction on the paper. Recording medium 2 held on writing table 1
A ball 4 at the tip of a ballpoint pen 3 as an example of a writing implement is brought into contact with the upper surface of the writing tool with a predetermined writing pressure (for example, 100 g). At the time of measurement, the writing table 1 is moved together with the recording medium 2 so as to move relative to the ball-point pen 3, and the ball-point pen 3 is moved on the upper surface of the recording medium 2 in a zigzag manner to write.

In order to measure the writing state of the ballpoint pen 3 that performs such writing, various types of data are measured,
It is desirable to analyze with them.

Therefore, in the present embodiment, the ball pen 3 is formed so that at least the frictional state and the vibrational state during the writing operation can be measured.

The frictional state is measured by detecting a frictional force applied to the ballpoint pen 3 by the compression / tension type minute load sensor 5. This frictional force can be converted to a coefficient of friction,
The hand measures the weight and lightness felt by the writing instrument when writing.

As for the other vibration state, the ballpoint pen 3
In the horizontal direction and the vertical direction, vibration acceleration sensors 6H and 6V and / or an acoustic emission sensor (hereinafter, referred to as an AE sensor) 7H,
The voltage applied to the ballpoint pen 3 is used to measure the vibration acceleration or the vibration energy by applying 7V. Thus, a state other than the frictional force, that is, a state generally called writing quality and writing feeling (hard, stiff, smooth, caught, squeaky, etc.) is measured.

As shown in FIG. 1, the writing table 1 itself has horizontal and vertical vibration acceleration sensors 8H and 8V.
Further, the AE sensor 9 may be fixed and formed so as to measure the vibration acceleration and the vibration energy of the drive system for performing the relative movement between the ballpoint pen 3 and the recording medium 2 so as to be useful for the analysis of the writing state.

Next, the detection unit and the data processing unit in FIG. 2 will be described.

In FIG. 2, a minute load sensor 5 is provided for one friction state with respect to the ballpoint pen 3, and horizontal and vertical vibration acceleration sensors 6H and 6V are provided for the other vibration state. The writing table 1 itself has horizontal and vertical vibration acceleration sensors 8.
H, 8V and AE sensors 9 are provided. Further, a temperature sensor 10 and a humidity sensor 11 are provided to measure the measurement environment.

The data measured by the micro load sensor 5, the horizontal and vertical vibration acceleration sensors 6H, 6V, 8H, 8V and the AE sensor 9 are temporarily stored in a storage unit 13 such as a memory in the operation control unit 12. Display means 1 comprising an image display and / or a printer with contents stored according to predetermined display conditions.
4 is displayed.

More specifically, the value measured by the micro load sensor 5 is converted into appropriate digital data by the amplifier / converter 15. The measured values of the horizontal and vertical vibration acceleration sensors 6H, 6V, 8H, 8V are converted into appropriate digital data by the amplifier / converter 16 of four channels. The measurement value of the AE sensor 9 is converted into appropriate digital data via the measurement circuit 17.

The temperature and humidity detected by the temperature sensor 10 and the humidity sensor 11 are converted into appropriate digital data by amplifiers / converters 18 and 19, respectively, and displayed on the display means 14.

FIG. 3 shows a fully automated writing state measurement.

That is, the measurement unit on the left side of the broken line in FIG. 2 is input to the computer 21 via the IEEE bus 20, and necessary signal processing is performed by the computer 21. It is formed to display the measured writing state on the means. Further, a command is issued to a motor (not shown) or the like which is a drive system of the writing table 1 via the writing operation control system 23 so that the moving speed of the writing table 1 can be variably adjusted. Further, a command is issued to the heater and the humidifier (both not shown) via the temperature controller 24 and the humidity controller 25 so that the measurement environment can be variably adjusted.

Next, a specific embodiment of the present invention will be described with reference to FIGS.

FIG. 4 shows an embodiment of the writing state measuring apparatus according to the present invention.

In this embodiment, each component is a bed 3
1. On the right side of the bed 31, a support base 32 having columns 32a at the front and rear portions is fixed, and a lower end of a vertical rod 35 is pivotally attached to each column 32a with a horizontal rotation shaft 33. At the upper end of each vertical rod 35, a seesaw body 36 formed in a substantially rectangular frame shape with a rotating shaft 34 is pivotally supported at the longitudinal center. Further, tilt stoppers 39 are disposed on the left and right sides of the upper end of the vertical rod 35 so as to be able to freely move toward and away from each other. The swinging width is regulated within a predetermined width so that the vertical rod 35 is supported almost vertically. On the right side of the rotary shaft 34 of the seesaw body 36, a minute load sensor 37 is held and fixed at a position shown in the drawing by a base (not shown) fixed on the head 1. The central portion of the rotating shaft 34 is inserted and disposed through a minute gap in a hook-shaped detecting portion 38 protruding from one end of the minute load sensor 37. The swinging width of the vertical rod 35 caused by the tilt stopper 39 is such that the rotating shaft 34 moves beyond the width of the key-shaped detecting portion 38 of the minute load sensor 37 to apply a tensile load and a compressive load to the minute load sensor 37. The size can be provided. At the right end of the seesaw body 36, a screw rod 40 is provided to protrude in the horizontal direction, and a balance weight 41 is screwed to the screw rod 40. At the left end of the seesaw body 36, a writing implement holder 43 that can grasp various writing implements 42 is attached. The writing implement holder 43 is formed so that the writing implement 42 can be held at an arbitrary angle around the illustrated point A. Further, a vibration acceleration sensor or an AE sensor 44 (in this embodiment, a vibration acceleration sensor) is attached to the left end of the writing instrument holder 43, as shown in the drawing. One end of the vibration acceleration sensor 44 is formed so as to press a portion B corresponding to a position where the writing tool 42 is normally gripped by the writing tool 42 via a screw rod or the like. Seesaw body 36, screw rod 40, balance weight 4
1. The writing implement holder 43, the writing implement 42, and the vibration acceleration sensor 44 are integrally supported by the rotating shaft 34 and can swing about the rotating shaft 34 as if it were a seesaw. The vertical load applied to the writing point C, which is the tip of the writing implement 42, is equal to the balance weight 4
By selecting a position on one screw rod 40, it is possible to variably adjust. In addition, by configuring the writing tool 42 to be attachable and detachable to and from the writing tool holder 43 automatically, it is possible to perform an automatic sampling inspection of the writing tool 42 in the production line of the writing tool 42 and perform quality control.

Further, a recording medium 45 made of writing paper or the like is used.
Is arranged on the upper surface of the writing table 17 by an appropriate method so that the writing line 46 at the writing point C of the writing instrument 42 is contained in the recording medium 45. A slider 48 of a linear motion system (linear ball slide) is fixed to the lower surface of the writing table 17. The slider piece 48 is slidably mounted on the base piece 49 so that the writing table 17 can reciprocate linearly in the direction of arrow d. The left end of the base piece 49 is a bearing member 54,
54 is fixed to a ball nut 50 which is screwed with a ball screw 51 which is pivotally supported in the front-rear direction of the bed 31. The right end of the base piece 49 is fixed to a support block 52 which has wheels 53, 53 at front and rear ends, respectively, and is movable in the front-rear direction. The ball screw 51 is driven to rotate by a speed change motor 55 provided at the rear end. Thereby, the recording medium 45, the writing table 47, the slider piece 48 and the base piece 49 of the linear motion system, the ball nut 5
0, support block 52, wheels 53, etc.
The rotation of the ball screw 51 by the rotational drive of
Is formed so as to be movable in the direction of.

A connecting shaft 56 attached to the left end of the writing table 47 and a connecting shaft 59 attached to a rotary plate 58 driven by a speed change motor 57 attached to the left end of the bed 31 are connected. They are connected by a rod 60. Both ends of the connecting rod 60 have a so-called universal joint structure. Therefore, regardless of the movement of the writing table 47 in the direction of the arrow e by the speed change motor 55, the rotation of the speed change motor 57 via the rotary plate 58 is transmitted to the writing table 47 via the connecting rod 60, so that the writing table 47 is transmitted. 47 can be converted into a reciprocating motion in the direction of arrow d.

The above-described writing condition measuring apparatus of the present embodiment is of a desktop type and small in size, and it is easy to install the entire apparatus in a temperature and humidity adjustment environment and control environmental conditions.

Next, a description will be given of a method of measuring the writing state of an arbitrary writing instrument using the apparatus of this embodiment.

First, the vertical rod 35 is firmly and tightly held from both sides by the two tilt stoppers 39 so that the central portion of the rotating shaft 34 fits into the hook-shaped detecting portion 38 of the minute load sensor 37. This is because, if an excessive force is applied to the key-shaped detection unit 38 of the micro load sensor 37 having only a delicate load capability due to an unexpected operation during the operation of setting the writing instrument 42 or the like, there is a possibility of breakage. . Next, an arbitrary writing tool 42 is inserted into the writing tool holder 43 and fixed with a screw rod forming a part of the vibration acceleration sensor 44. At this time, the writing angle θ of the writing implement 42 with respect to the recording medium 45 is
The desired angle is set by rotating the writing holder 43 about the point A in the figure. Next, the recording medium 45 is set at a predetermined position on the upper surface of the writing table 47. Next, the writing load applied to the writing implement 42 is adjusted by moving the balance weight 41 on the screw rod 40.

After the above operation is completed, the holding of both the tilt stoppers 39 to the vertical rod 35 is released, that is, a gap is provided between the vertical stopper 35 and the vertical rod 35, and the rotary shaft 34 is set in a free state. This leaves only the support of the hook-shaped detection portion 38 protruding from the left end of the micro load sensor 44.

Next, the speed change motor 55 and the speed change motor 5
By driving 7, the writing table 47 starts reciprocating movement in the direction of arrow d and movement in the direction of arrow e (either one of the ea direction or the eb direction).

As a result, a zigzag writing line 51 is written on the recording medium 45 as shown in FIG.

At this time, for example, when the writing table 47 moves in the da direction, the recording medium 45 pushes the rotating shaft 34 in the fa direction together with the seesaw body 36 via the writing point C, The key-shaped detection unit 38 of the sensor 37
It will receive a compressive load. On the other hand, the writing table 47 is db
When moving in the direction, a tensile load is applied. In any case, a minute load (writing resistance, frictional force) in the direction parallel to the recording medium by writing can be delicately sensed.

At this time, since the seesaw body and the writing instrument 42 are supported by the pinpoint support mechanism using the rotating shafts 33 and 34 at the upper and lower portions of the vertical rod 35, disturbance load can be minimized. Obviously, it is possible to enable a sensitive sensing of the frictional force of writing.

On the other hand, when the writing instrument 42 writes between the writing medium 42 and the recording medium 45, the writing point C is set as a main expression point.
Various fine phenomena, for example, vibration, chatter, snagging, jagged phenomena, etc., are measured and collected in units of acceleration by the vibration acceleration sensor 44, for example, and sound energy, that is, AE (acoustic emission) units in other examples. Collect at

At this time, the vibration acceleration sensor 44 or the AE
The mounting position of the sensor 44 is, as illustrated, the writing implement 42.
It is desirable to install the device close to a portion that is normally gripped by a person. However, for example, an appropriate position G on the writing table 47 may be used. Also, a plurality of measurement points may be installed at the same time.

As described above, according to the present embodiment, the frictional force of writing is measured as a load, and the feeling, which can be called the sensitivity evaluation of writing feeling (writing quality), is measured and displayed simultaneously and plurally in the form of vibration acceleration or AE. , Can be recorded.

Next, the measurement result of the writing state measured as described above will be described.

A: Data characteristics based on the type of writing instrument will be described with reference to FIGS.

In this case, there are five types of writing implements: oil-based ballpoint pens, water-based ballpoint pens, pencils (HB), fountain pens, and oil-based felt-tip pens. The writing conditions were the same for each writing implement, the writing load was 100 gf, the writing angle was 65 °, and the writing speed was 0.3 m / min. 5 to 9, the upper portion shows the vibration acceleration characteristics, the lower portion shows the frictional force characteristics, the horizontal axis represents time, and one scale is 2 seconds.
The vertical axis indicates the vibration acceleration and the frictional force in units of 0.01 G and 10 g per scale.

The features of each figure are as follows.

In the case of an oil-based ballpoint pen (FIG. 5) The vibration acceleration is small. Although the written frictional force is small, it shows a pattern that is rounded in the convex direction during dynamic friction. Although the vibration acceleration was detected by the vibration acceleration sensor 44, the data detected by the AE sensor also showed characteristics that changed substantially similarly. The same applies to other measurement examples. The AE sensor is adjusted so that the frequency characteristic is adjusted to an appropriate value according to the purpose of measurement.

In the case of an aqueous ballpoint pen (FIG. 6), the vibration acceleration is large and the change density is large. The frictional force of writing is large, showing a pattern in which the central part is recessed during dynamic friction, and is close to a square wave.

In the case of a pencil (HB) (FIG. 7), the vibration acceleration is minimal. The frictional force of writing is small, and when switching from static friction to dynamic friction, a pattern having rising protrusions and falling protrusions is shown, respectively, and variation in frictional force is small.

In the case of a fountain pen (FIG. 8) The vibration acceleration is moderate. The written frictional force is large, shows a vertically long and short wave pattern, and the frictional force has a large variation.

In the case of an oil-based felt-tip pen (FIG. 9) The vibration acceleration is small. The frictional force of writing is almost the same as that of the water-based ballpoint pen.

The following can be understood from the above data.

First, patterns peculiar to various writing instruments are seen.

In addition, the sensory and responsive evaluation of a writing instrument that a person feels during normal use does not always match the measurement result measured by a measuring device under certain conditions. For example, when the frictional force between the writing of an oil-based ball-point pen and the writing of a fountain pen is compared under a certain writing load, the fountain pen is larger (although it can be said that it is an absolute evaluation). Many people think that fountain pens can be written lighter and smoother according to the responsive evaluation that is usually obtained when writing by hand, but this is originally the pen pressure (writing load) when a person writes with a fountain pen This is probably because the writing pressure is smaller than the writing pressure applied to the ballpoint pen, and as a result, the frictional force of writing is felt to be relatively small.

When analyzing the properties of a writing instrument, the properties of any writing instrument can be more clearly understood by combining the frictional force of the writing instrument and the vibration of the writing instrument and simultaneously performing observation and analysis.

For example, the property shown by the pencil in FIG. 7 is that the frictional force of writing is smaller than that of other writing tools, and the vibration received by the writing tool shows the minimum value among the above five writing tools. This is probably because the solid lubricity of the pencil in the solid core contributes to the reduction of writing friction and vibration.

For example, it can be understood by comparing and observing the data of the oil-based pen (FIG. 5) and the data of the pencil (FIG. 7) that the writing direction is reversed by making the writing line 46 a zigzag writing. Therefore, the characteristic shown at this time indicates a pattern when moving from static friction to dynamic friction and from dynamic friction to static friction when changing the writing direction in various writing tools. That is, in the case of the oil-based pen, when the writing method is reversed, the aspect gradually increases and decreases gradually, and the overall pattern has a rounded shape.

On the other hand, in the case of the pencil, when the reversal occurs, when the kinetic friction changes to the static friction, the protrusion of the friction is not remarkable, but a prominent change can be observed when the static friction changes to the dynamic friction. What this data means is at the discretion of the observation observer, but in any case, the data obtained from such a measurement system is inherently characteristic of the writing instrument in question. Which is useful for analysis.

B: Data characteristics of the same type of writing implement when the material of the constituent parts is changed will be described with reference to FIGS. 10 and 11. FIG.

The type of writing implement in this case is an oil-based ballpoint pen. The writing conditions were the same for each writing implement, the writing load was 100 gf, the writing angle was 65 °, and the writing speed was 0.3 m / min. 10 and 11, the vibration acceleration characteristic is shown at the upper part, and the frictional force characteristic is shown at the lower part. The horizontal axis indicates time, one division is 2 seconds, and the vertical axis is the vibration acceleration and the frictional force. Is set to 0.01G and 1 scale
It is shown in units of 0 g.

The material of the oil-based ball-point pen in each figure is as follows.

In the oil-based ball-point pen shown in FIG. 10, the ball is a super hard ball and the ball holder is brass.

As for the material of the oil-based ball-point pen in FIG. 11, the ball is a carbide ball and the ball holder is stainless steel.

It has been said that in the case of general ball tops, the case of stainless steel chips is harder to write and lacks in smoothness as compared with brass or nickel silver chips. The stainless steel tip used in FIG. 11 has an improved hardness of writing.

The following can be understood from the above data.

It can be seen by comparing and observing the data of FIG. 10 and FIG. 11 that the frictional force of writing is equal to or slightly higher than that of stainless steel as a feature seen in the conventional brass insert derailleur. As a whole pattern, there is little variation in fine fluctuation of the rounded frictional force. Further, the vibration is small as compared with stainless steel.

On the other hand, the feature of the data of the stainless steel tip is that the effect of improving the smoothness is certainly expressed as a small writing friction force. However, in the case of minute fluctuations, there is a large variation as compared with brass products.

In terms of vibration, the absolute value is still inferior to that of brass. This seems to reflect the minute chattering coming from the hardness of the stainless tip.

When any person uses the two ball-point pens shown in FIGS. 10 and 11 and asks for their feeling of use, one person should use a stainless steel ball-point pen and the other person should use a brass pen. This may be due in part to the difference between the human hand feeling, for example, the frictional force of writing and the vibrational property.

In any case, the responsive and sensory evaluations and expressions expressed by humans are changed into objective and quantitative evaluations.
It would be of great significance to be able to interpret this from various angles.

C: Data characteristics when the recording medium is changed for the same writing instrument will be described with reference to FIGS.

The type of writing implement in this case is an aqueous ballpoint pen. The writing conditions were the same for each recording medium, writing load 100 gf, writing angle 65 °, writing speed 0.3 m /
Minutes. 12 and 13, the upper portion shows the vibration acceleration characteristic, the lower portion shows the frictional force characteristic, the horizontal axis represents time, one scale is 2 seconds, and the vertical axis represents vibration acceleration and frictional force. Are shown in units of 0.01 G and 10 g per scale.

The material of the recording medium in each figure is as follows.

The material of the recording medium of FIG. 12 is ordinary copy paper, and that of FIG. 13 is a polished, smooth high-grade paper.

As shown in FIGS. 12 and 13, according to the present embodiment, even when the same writing instrument is used, the difference in surface roughness and the difference in ink absorbency due to the difference in writing paper as a recording medium. In addition, the effect of writing on the frictional force and vibration can be observed and analyzed well.

D: FIG. 14 shows data characteristics when collecting, enlarging, and analyzing one measurement data at an arbitrary time.
FIG. 16 will be described.

FIGS. 14A to 14D are for the same data, and the type of writing instrument in this case is an aqueous ballpoint pen. The writing conditions were a writing load of 100 gf and a writing angle of 6
5 °, writing speed 0.3 m / min. 14a to 14d
In each of the figures, the vibration acceleration characteristic is shown in the upper part, the frictional force characteristic is shown in the lower part, the vertical axis shows the vibration acceleration and the frictional force in units of 0.01 G and 10 g, and the horizontal axis shows The time is shown and the scale is changed in each figure.

Sampling of this measurement data at an arbitrary time,
A series of operations for enlargement will be described.

The data examples from a to d in FIG. 14 are handwriting data with an aqueous ballpoint pen. For example, the measurement data shown in FIG. Since the collected data is digitized and stored in the Ogilon graph, the data can be processed and expressed by an appropriate operation. For example, each data shown from b to d in FIG.
The data displayed in FIG. 14A is displayed by increasing the time axis (horizontal axis) by a factor of 2, 4, and 10 times.

As a result, the measured values which seem to be merely scattered at first glance on the data shown in FIG. 14A can be analyzed by characterizing and observing the fluctuation of each characteristic by expanding the time axis. For example, it is possible to clarify a criterion of the possibility of improvement of the same writing instrument, and to utilize the same writing instrument.

As described above, in this embodiment, data once collected can be freely processed according to the purpose.

FIGS. 15A and 15B show another enlarged example.
Among the data measured under the same writing conditions as in the above measurement example using a water-soluble ballpoint pen having a thickness of 0.5 mm using a stainless steel tip, only the frictional force characteristics of writing are displayed, and the horizontal axis is one scale. A time of 0.2 seconds is shown, and the vertical axis shows a friction force of 4 g per scale. 15A shows the characteristics at the time of rising, and FIG. 15B shows the characteristics at the time of falling.

FIGS. 16A and 16B show still another enlarged example, in which an aqueous ballpoint pen having a thickness of 0.7 mm using a Ni-Si chip was written in exactly the same manner as in FIGS. Only characteristics are displayed.

As described above, the method and apparatus of the present invention are extremely useful for measuring writing conditions.

That is, the writing conditions (writing speed, writing angle, writing load, mounting of various writing tools, writing paper, underlay, temperature and humidity of the writing environment, etc.) of various writing tools can be changed according to the purpose of measurement. , And simultaneously measure and display on multiple channels. In addition, the measured value
A digital conversion function and a storage function (digital storage oscilloscope) are exhibited, and data processing, reproduction, display function, and the like after storage can be exhibited. In addition, by comparing the measured data with the good writing condition of each writing instrument, it is possible to accurately and easily clarify the defective component of the writing instrument, and to perform a sampling inspection on the writing instrument production line. And quality control.

The principle of the method and the apparatus of the present invention can be used in other industrial fields other than the measurement of the writing state. For example, it can be used very well in fields that require comparison of frictional force, friction coefficient, and vibration state.

The present invention is not limited to the above embodiment, but can be modified as needed.

[0099]

As described above, the writing state measuring method and apparatus according to the present invention are constructed and operated, so that the writing state of various writing instruments can be quantitatively and objectively known. By simultaneously measuring the friction state and the vibration state imparted to the writing implement during the writing operation, it is possible to measure the writing friction force and the smoothness of the writing, which are the main elements of the writing state of the writing implement, and the obtained results can be obtained. Based on the measurement results, it is possible to recognize the writing state pattern characteristic of each writing instrument, and to make a more appropriate judgment of the writing state, that is, to compare the measurement data with the good writing state of each writing instrument. Thereby, it is possible to accurately and easily clarify a defective component part in a writing instrument,
Sampling inspection and quality control of the writing instrument production line can be performed, and by storing measurement data, it is possible to document measurement data beyond time and space and to use it effectively. To play.

[Brief description of the drawings]

FIG. 1 is a configuration diagram schematically showing a writing state measuring device of the present invention.

FIG. 2 is a block diagram of a detection unit and a data processing unit;

FIG. 3 is a block diagram of a detection unit and a data processing unit for fully measuring the writing state;

FIG. 4 is a perspective view showing one embodiment of a writing state measuring device of the present invention.

FIG. 5 is a diagram showing vibration acceleration characteristics and frictional force characteristics of a writing instrument.

FIG. 6 is a diagram showing vibration acceleration characteristics and frictional force characteristics of a writing instrument.

FIG. 7 is a diagram showing vibration acceleration characteristics and frictional force characteristics of a writing instrument.

FIG. 8 is a diagram showing vibration acceleration characteristics and frictional force characteristics of a writing instrument.

FIG. 9 is a diagram showing a vibration acceleration characteristic and a frictional force characteristic of a writing instrument.

FIG. 10 is a diagram showing vibration acceleration characteristics and frictional force characteristics of a writing instrument.

FIG. 11 is a diagram showing vibration acceleration characteristics and frictional force characteristics of a writing instrument.

FIG. 12 is a diagram showing vibration acceleration characteristics and frictional force characteristics of a writing instrument.

FIG. 13 is a diagram showing vibration acceleration characteristics and friction force characteristics of a writing instrument.

14A to 14D are diagrams showing vibration acceleration characteristics and frictional force characteristics of a writing instrument, where a is the current diagram, and b to d are the data displayed in a, and the respective time axes (horizontal axes). Twice,
Diagram displayed at 4x and 10x speedup

FIGS. 15A and 15B are diagrams illustrating vibration acceleration characteristics and frictional force characteristics of another enlarged writing instrument.

16A and 16B are diagrams showing vibration acceleration characteristics and frictional force characteristics of still another writing implement enlarged.

[Explanation of symbols]

 Reference Signs List 1,47 Writing table 2,45 Recording medium 3,42 Ballpoint pen, writing implement 5,37 Micro load sensor 6,8,44 Vibration acceleration sensor 7 AE sensor 12 Operation control means 13 Storage means 14 Display means 21 Computer

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Koichi Matsukawa 4-59-9 Kuramae, Taito-ku, Tokyo Auto Corporation (72) Inventor Atsushi Yamanaka 4-59-9 Kuramae, Taito-ku, Tokyo Auto (72) Inventor Kazunori Nakayama 4-5-9 Kuramae, Taito-ku, Tokyo Auto Corporation (56) References JP-A-63-102998 (JP, A) JP-A-60-69523 (JP) , A) Japanese Utility Model 3-70999 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B43L 13/00 B43K 1/00 G01H 17/00 G01L 5/00 G01N 19/00

Claims (6)

(57) [Claims] 1. A frictional state and a vibration state applied to a writing implement during a writing operation in which a recording medium and a writing implement are relatively moving are simultaneously measured, and each of the frictional state and the vibration state obtained by the measurement is measured over time. A writing state measuring method, comprising: observing a combination of patterns to detect a writing state comprising a writing friction force and a smoothness of writing during the writing operation of the writing instrument. 2. The friction state applied to the writing instrument is measured by measuring a frictional force, and the vibration state applied to the writing instrument is measured by measuring a vibration acceleration and / or an acoustic emission. The writing state measuring method according to claim 1, wherein: 3. The writing state measuring method according to claim 1, wherein the measurement data is stored and the measurement data is displayed according to a predetermined display condition. 4. A writing operation imparting means to perform a writing operation by the recording medium and moved relative to the writing instrument, and friction state measuring means for measuring the friction state applied to the writing instrument in the writing operation, during said writing operation and a vibration state measuring means for measuring the vibration state to be applied to the writing instrument, the time of the friction conditions and vibration conditions imparted to the writing implement in the writing operation by the friction state measuring means and the vibration state measurement means Simultaneously measuring the pattern, combining and observing the frictional state and the vibrational state obtained by the measurement, detecting the writing state composed of the writing frictional force and the smoothness of the writing during the writing operation of the writing implement, Writing state measuring device. 5. The friction state measuring means is formed by a minute load sensor for measuring a frictional force, and the vibration state measuring means is a vibration acceleration sensor for measuring a vibration acceleration and / or
5. The writing state measuring device according to claim 4, wherein the writing state measuring device is formed by acoustic emission that measures acoustic emission. 6. 6. The data storage device according to claim 4, further comprising data storage means for storing the measurement data, and data display means for displaying the measurement data according to predetermined display conditions. Writing condition measuring device.