JPH0571947A - Simple object inspection device and object inspection method - Google Patents

Abstract

PURPOSE:To enable a shape regarding a sample single part to be identified by simulating a supply state of the operation force and a function inspection of the sample to be performed in a short time without incorporating the sample which is used while the operation force is being applied to into a structure which is related to an actual usage state for a simple object inspection device. CONSTITUTION:A sample-placing means 11 for placing a sample 19 and a press means 12 for applying an operation force P to the sample 19 are provided. Further, a force-detection means 13 which detects a reaction state from the sample 19 and then outputs a force-detection signal SP and a control means 14 which controls I/O of at least the press means 12 and the force-detection means 13 are provided.

Description

Detailed Description of the Invention

[Table of Contents] Industrial Application Field of the Prior Art (FIG. 11) Problem to be Solved by the Invention (FIG. 12) Means for Solving the Problem (FIGS. 1 and 2) Action Embodiment (1) First Description of Embodiment 1 (FIGS. 3 and 4) (2) Description of Second Embodiment (FIGS. 5 to 8) (3) Description of Third Embodiment (FIGS. 9 and 10)

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple object inspection device and an object inspection method.
The present invention relates to an apparatus and a method for identifying a shape of a reversible sample such as a leaf spring or a platen of a printing machine, which is actually used, by a single item.

In recent years, printing equipment such as a thermal printer using a thermal paper as a recording medium has been used. According to this, the thermal printing process is performed on the thermal paper inserted between the platen and the thermal head. By the way, the shape of the platen, which influences the quality of the thermal printing, is different between a state in which no acting force is applied and a state in which the acting force is applied.

Therefore, the quality of a sample such as a platen or a leaf spring used in a thermal printer is judged based on its appearance shape inspection and function inspection. However, although the external shape inspection of the platen can be performed on a single item (component), the functional inspection must be performed by attaching the platen to the printer, and the inspection cannot be performed in a short time on the individual platen.

Therefore, without incorporating a sample such as a platen to be used in a state in which an acting force is applied to a component according to an actual use state, the supply state of the acting force is simulated to identify the shape of the sample single piece. There is a demand for an apparatus and method capable of performing the above-mentioned test and performing a functional test of the sample in a short time.

[0006]

2. Description of the Related Art FIGS. 11 and 12 are explanatory views according to a conventional example. 11 (a) to 11 (d) are explanatory views of an object inspection method according to a conventional example.

A sample having a different shape between the state in which the acting force F is not applied as shown in FIG. 11A and the state in which the acting force F is applied as shown in FIG. An object inspection method for inspecting the quality of the platen 1 used in the printer is performed based on an appearance shape inspection and a function inspection.

The platen 1 has a drum shape in an axial cross section as shown in FIG. 11 (a). As shown in FIG. 12, the thermal paper 6 inserted between the thermal head 2 and the platen 1 of the thermal printer is made to face the predetermined mounting position of the heating resistor to prevent the scrape or jam state. Is.

Here, the rubbed state means that the end portion of the thermal paper 6 abnormally hits the sample guide mechanism and becomes crumpled due to scratches or the like, and the jam state means that the rugged state develops and the surface of the thermal paper 6 is broken. Means that it bends.

FIG. 11 (d) shows a flowchart for inspecting the platen according to the conventional example. In FIG. 11 (d),
First, in step P1, the external shape of the platen 1 in the state where the acting force F is not applied is inspected (external shape inspection). At this time, for example, the platen 1 in the state in which the acting force F is not applied is hit with the reference shape ruler 3 as shown in FIG. 11 (c), and the gap or the like is visually inspected or the image processing apparatus using the laser beam. Image processing is performed by, and the defective product is extracted.

Next, in step P2, the function of the platen 1 with the acting force F applied thereto is inspected (function inspection). Here, for example, as shown in FIG. 12, the platen 1 is attached to a printer together with other components, and the thermal head 2 is actually driven via the print control device 5 to print the thermal paper 6, and In addition to the print evaluation based on the result, it is determined whether or not the platen 1 is optimum.

As a result, the quality of the platen 1 is judged based on the appearance shape inspection and the function inspection.

[0013]

By the way, according to the conventional example, as shown in the problem of FIG. 12, the platen 1 which has passed the appearance shape inspection is attached to the printer and pressure (action) is applied via the leaf spring 7. Force) F presses the thermal head 2 toward the platen. In this state, the platen 1
Functional tests are performed.

For this reason, the external shape inspection of the platen 1 can be performed on a single item (component), but the functional inspection must actually attach the platen 1 to the printer, and the functional inspection can be performed on the platen single item for a short time. Cannot be done (see Figure 12).

Even if the appearance shape inspection is passed (passed), the function test of the platen 1 actually attached to the printer does not always pass. This means that even if the platen shape is a normal platen shape that has passed the appearance shape inspection, the platen shape is different between the actual use state in which the acting force F is applied and the appearance state in which the acting force F is not applied. This is because the platen shape also changes due to subtle changes in the acting force F of the leaf spring 7 and the degree of rotation of the platen.

This is largely due to variations in the composition of the rubber inside the platen, etc., depending on the accessory components, but it is difficult to check this only by visual inspection. The quality of the platen is limited to the secondary shape recognition based on the print evaluation of the thermal paper 6.

As a result, there is no abnormality in the mounting method of the platen 1, and despite the cause of the platen itself which has passed the appearance shape inspection, a large amount of wasted time is spent in the adjustment work of its accessory components. There is a problem.

A method of analyzing an object of the platen 1 in an actual use state by a three-dimensional image processing apparatus can be considered, but the apparatus is expensive and its handling is complicated. In addition, it takes a long time to analyze an image per platen part.

The present invention was created in view of the problems of the conventional example, and the working force is applied without incorporating a sample used in a state in which the working force is applied to the structure according to the actual use state. It is an object of the present invention to provide a simple object inspection device and an object inspection method capable of simulating the supply state of (1) to identify the shape of a single sample and performing a functional inspection of the sample in a short time.

[0020]

FIG. 1 is a principle diagram of a simple object inspection apparatus according to the present invention, and FIG. 2 (a)-(d).
3A and 3B respectively show principle diagrams of the object inspection method according to the present invention.

As shown in FIG. 1, the first simple object inspection apparatus of the present invention comprises a sample placing means 11 for placing a sample 19 thereon,
Pressurizing means 12 that applies an acting force F to the sample 19, force detecting means 13 that detects a reaction state from the sample 19 and outputs a force detection signal SP, at least the pressing means 12 and the force detecting means. Control means 1 for controlling input / output of 13
And 4 are provided.

Further, the second simple object inspection apparatus of the present invention, as shown in FIG.
Sample driving means 15 for driving the sample 19 is provided,
The control means 14 controls the input / output of the sample driving means 15.

Further, as shown in FIG. 1, the third simple object inspection apparatus of the present invention is the same as the first simple object inspection apparatus, except that two or more pressurizing means 12 are provided and the control means 14 is added thereto. It is characterized in that the input / output of the pressure means 12 is individually controlled.

The first to third simple object inspection apparatuses of the present invention are characterized in that a storage means 16 for storing reference data DR which is a reference for judging the sample 19 is provided.

Further, in the first to third simple object inspection apparatuses of the present invention, the state output means 17 for outputting the reaction state of the sample 19 is provided. Furthermore, in the first to third simple object inspection devices of the present invention,
The force detecting means 13 is composed of a plurality of force detecting elements PE1 to PEn as shown in FIG. 2C, and the force detecting means 13 is provided on the side facing the sample 19.

Further, in the first to third simple object inspection apparatuses of the present invention, as shown in FIG. 1, the pressing means 12, force detecting means 13, control means 14, sample driving means 15, storage means 16 and A storage battery 18 for driving the state output means 17 is provided.

The object inspection method of the present invention is shown in FIG.
The state in which the acting force F is applied as shown in FIG.
A method for recognizing the shape of the sample 19 under pressure, which has a different shape when the acting force F is not applied as shown in (a), as shown in the flowchart of FIG.
First, in step P1, the sample 19 in a stationary state or a driven state is
To the reaction data D1 based on the detection process and the judgment standard of the sample 19 in step P3. The above-described object is achieved by a comparison process with the reference data DR.

[0028]

[Operation] According to the first simple object inspection device of the present invention,
As shown in FIG. 1, the sample placing means 11, the pressing means 12, the force detecting means 13 and the control means 14 are provided.

For example, when the sample 19 such as a leaf spring is placed on the sample placing means 11, the acting force F is applied to the sample 19 by the pressurizing means 12 via the control means 14. Also,
The reaction state such as the repulsive force from the sample 19 is shown in FIG.
As shown in (c), it is composed of a plurality of force detection elements PE1 to PEn and is detected by the force detection means 13 provided on the side facing the sample 19, and the force detection signal SP is controlled by the force detection means 13. It is output to the means 14.

Therefore, the control means 14 reads out the reference data DR, which is the reference for judging the sample 19, from the storage means 16, compares the reference data DR with the reaction data D1 based on the force detection signal SP, and As a result, the reaction state of the sample 19 is displayed on the state output means 17 or is alarmed.

As a result, the sample 1 is not actually attached to a component such as a printer unlike the conventional example.
Similar to the appearance shape inspection of 9, it is possible to perform the function inspection in a short time and easily on a single sample product.

Further, according to the second simple object inspection apparatus of the present invention, as shown in FIG. 1, in the first simple object inspection apparatus, the sample driving means 15 is provided and the control means 14 is the sample driving means. It controls 15 inputs and outputs.

For example, when a sample 19 such as a platen of a thermal printer is placed on the sample placing means 11, the acting force F is applied to the sample 19 by the pressing means 12 via the control means 14.
Added to. At the same time, the sample 19 is driven by the sample driving means 15 via the control means 14. The driving state at this time is determined by the number of rotations suitable for the actual use state,
Is controlled to rotate.

The reaction state such as the repulsive force from the sample 19 is the same as that of the first simple object inspection apparatus, and the force detection means 1
3, the force detection signal SP is detected by the force detection means 1
3 to the control means 14.

Therefore, the control means 14 reads the reference data DR, which is the reference for judging the sample 19, from the storage means 16 as in the first simple object inspection device, and outputs the reference data DR and the force detection signal SP. The reaction data D1 based on this is compared, and as a result, the reaction state of the sample 19 is displayed on the state output means 17.

As a result, the functional inspection of the sample 19 such as the platen can be carried out in a short time on a single sample as in the first simple object inspection apparatus. Further, according to the third simple object inspection apparatus of the present invention, two or more pressurizing means 12 are provided as shown in FIG. 1, and the control means 14 individually controls the input and output of the pressurizing means 12. There is.

For example, the action force F is applied to the sample 19 such as a platen having a distribution of the maximum pressure value in actual use through the control means 14 by the pressurizing means 12 provided two or more times. .. At the same time, the rotation of the sample 19 is controlled by the rotation speed suitable for the actual use condition.

The reaction state such as the repulsive force from the sample 19 is the same as that of the first simple object inspection apparatus.
3, the force detection signal SP is detected by the force detection means 1
3 to the control means 14.

Therefore, the control means 14 reads the reference data DR, which is the reference for judging the sample 19, from the storage means 16 as in the case of the first and second simple object inspection devices, and the reference data DR and the force detection. Reaction data D1 based on signal SP
Are compared, and as a result, the reaction state of the sample 19 is displayed on the state output means 17.

As a result, as compared with the first and second simple object inspection apparatuses, it becomes possible to perform a functional inspection in a single sample in a short time according to the model in which the sample 19 such as a platen is used.

Further, according to the first to third simple object inspection devices, as shown in FIG. 1, the pressing means 12 and the force detecting means 1 are used.
3, the control means 14, the sample driving means 15, the storage means 16 and the state output means 17 are driven by the storage battery 18.

Therefore, the object inspection apparatus can be made compact and can be easily carried because it is portable. This alleviates the restrictions on the work place and work environment in which the functional inspection of the sample 19 is performed.

According to the object inspection method of the present invention, as shown in the flow chart of FIG.
In step P2, the reaction state with respect to the acting force F supplied to the sample 19 in the stationary state or the driven state is detected and processed in step P2, and thereafter, the reaction data D1 based on this is compared with the reference data DR of the sample 19. Has been done.

Therefore, the leaf spring having a different shape between the state in which the acting force F is applied as shown in FIG. 2B and the state in which the acting force F is not applied as shown in FIG. 2A. As in the conventional example, the shape of the sample 19 such as a platen or the like when actually used is not actually attached to a component such as a printer,
It is possible to identify the acting force F as a shape of a single sample simulating the acting force.

As a result, it becomes possible to perform a functional inspection suitable for the actual use condition in which the acting force F is applied to the platen shape apparently passed by the appearance shape inspection.

As a result, it becomes possible to eliminate the functional defects existing inside the sample 19 due to the compositional variations and the like at the stage of parts. As a result, the reliability of the sample 19 is improved, and a large amount of time is not spent on the adjustment work of its accessory components.

[0047]

Embodiments of the present invention will now be described with reference to the drawings. 3 to 10 are diagrams illustrating a simple object inspection device and an object inspection method according to an embodiment of the present invention.

(1) Description of the First Embodiment FIGS. 3 (a) and 3 (b) are explanatory views of a simple object inspection apparatus according to the first embodiment of the present invention. FIG. 3B shows an external side view thereof, and FIG. 4 shows an internal configuration thereof.

In FIG. 3A, a simple object inspection device for inspecting the function of the leaf spring 7 which is an example of the sample 19 comprises a frame section 10, a control mechanism section 20, a sample stand 21, a pressure sensor 23A and the like.

That is, the sample table 21 is the sample mounting means 11
This is an example in which a leaf spring 7 for fixing a thermal head in a thermal printer is placed as a sample 19. In addition, the sample table 21 includes the frame portion 10.
It is fixed to.

The pressure sensor 23A constitutes a part of the force detecting means 13, and detects the reaction state from the leaf spring 7 and outputs a force detection signal SP to the control mechanism section 20. Note that other configurations will be described in detail in FIG.

The control mechanism section 20 is an embodiment constituting the pressurizing means 12 and the control means 14, and the internal structure thereof will be described in detail with reference to FIG. A display unit 27A, a start switch 27B, and an operation panel 27C are attached to the side surface of the control mechanism unit 20. Further, the connecting rod 22A is pulled out from the other side surface and is engaged with the dummy plate 23C having the pressure sensor 23 built therein.

FIG. 4 shows the main structure of a simple object inspection apparatus according to each embodiment of the present invention. In FIG. 4, the control mechanism unit 2
0 is the sensor pressure adjustment unit 22B and the sensor pressure setting unit 22
From C, A / D converter 23B, MPU (microprocessor unit) 24, motor controller 25B, RAM (memory capable of writing and reading at any time) 26A, ROM (read-only memory) 26B, display unit 27A, start switch 27B, battery 28 Become.

That is, the sensor pressing force adjusting unit 22B and the sensor pressing force setting unit 22C constitute a part of the pressurizing means 22, and the sensor pressing force adjusting unit 22B includes the plate spring 7, the pressure sensor 23A, and the dummy. An acting force (hereinafter also referred to as a pressing force) F is applied via the plate 23C and the connecting rod 22A.

A pressure gauge or the like is used for the sensor pressure adjusting unit 22B, and the adjusting unit 22B is commonly used in the first to third embodiments of the present invention. Also, the sensor pressure setting unit 22C
Is for setting the acting force F, and is the third aspect of the present invention.
Used in the examples of.

The A / D converter 23B has a force detecting means 13
The force detection signal SP is converted from analog to digital, and the reaction data D1 is converted to M.
It is output to the PU 24. A / D converter 23B
Is provided for each of the piezo elements PE1 to PEn forming the force detection means 13, and outputs reaction data D1 in hexadecimal notation based on the detected voltages V1 to Vn output from the piezoelectric elements.

The MPU 24 is an embodiment of the control means 14, and includes a sensor pressure adjusting unit 22B and a sensor pressure setting unit 22.
C, A / D converter 23B, MPU 24, motor controller
The input / output of 25B, RAM26A, ROM26B and display 27A is controlled. For example, the MPU 24 identifies the operating state of the leaf spring 7 or the platen 1 according to the second embodiment based on the force detection signal SP (voltage V).

The motor controller 25B controls the drive of the motor 25A in the second embodiment. RA
M26A and ROM26B are examples of the storage means 16,
For example, the ROM 26B stores in advance reference data DR which is a reference for determining the pressurization state of the sample 19. Also,
The RAM 26A stores control data and the like related to the function inspection.

The display unit 27A is one embodiment of the state output means 17, and is used to warn of a judgment result of the pressurization state of the sample 19 and an abnormal state in which the maximum pressure distribution is displaced laterally from the central portion of the sample 19. is there. The activation switch 27B activates the inspection device.

The battery 28 is an embodiment of the storage battery 18, and includes a sensor pressure adjusting unit 22B and a sensor pressure setting unit 22.
C, A / D converter 23B, MPU 24, motor controller
25B, RAM26A, ROM26B, and the display part 27A are driven. For example, the battery 28 is a nickel-cadmium storage battery.

The pressure sensor 23A is composed of a plurality of force detecting elements PE1 to PEn, which are piezo elements, as an example of a plurality of force detecting elements PE1 to PEn on the dummy plate 23C, and as shown in FIG.
PEn is provided on the surface of the platen or the like facing the sample 19. The output characteristics of the piezo element are linear (straight line).
The characteristic is a linear function characteristic in which the force detection signal SP decreases when the repulsive force from the leaf spring 7 decreases, for example.

That is, the force detection signal SP of the portion where the repulsive force is weak against the pressing force F pressing the leaf spring 7 decreases, and the leaf spring 7 is evenly distributed by observing the distribution characteristics of these portions. It is possible to judge whether or not it has a repulsive force.

As a result, the positional displacement of the maximum pressure distribution of the pressure sensor 23A can be finely detected and the repulsive force from the leaf spring 7 can be accurately detected. In the second embodiment, M
In the PU 24, the degree of close contact between the sensor 23A and the platen can be confirmed.

As described above, according to the simple object inspection apparatus of the first embodiment of the present invention, as shown in FIGS. 3 and 4, the frame portion 10, the control mechanism portion 20, the sample table 21 and the pressure sensor 23A are used. The control mechanism unit 20 includes a sensor pressurizing force adjusting unit 22B, a sensor pressurizing force setting unit 22C, an A / D converter 23B, an MPU 24, a motor control unit 25B, and a RAM 26.
A, ROM 26B, display 27A, start switch 27B, and battery 28.

For example, the leaf spring 7 is placed on the sample table 21,
When the start switch 27B is turned "ON", the dummy plate 23C, the connecting rod 22A, the sensor pressing force adjusting unit 22 is passed through the MPU 24.
The acting force F is applied to the leaf spring 7 by B and the sensor pressing force setting unit 22C. The reaction state such as the repulsive force from the leaf spring 7 is detected by the pressure sensor 23A including a plurality of force detection elements PE1 to PEn, and the force detection signal SP is transmitted from the pressure sensor 23A through the A / D converter 23B. MPU24
Is output to.

Therefore, in the MPU 24, the reference data DR which is the judgment reference of the leaf spring 7 is read from the ROM 26B, and the reference data DR and the reaction data D1 based on the force detection signal SP are compared in the RAM 26A, and the result is obtained. The reaction state of the leaf spring 7 is displayed on the display unit 27A.

As a result, unlike the conventional example, the leaf spring 7 is not actually attached to a component such as a printer, but like the appearance shape inspection of the leaf spring 7, the functional inspection can be performed on a single sample in a short time. Is possible.

(2) Description of Second Embodiment FIG. 5 is an explanatory diagram of a simple object inspection apparatus according to the second embodiment of the present invention, and FIG. 6 is a supplementary explanatory diagram thereof. In FIG. 5, what is different from the first embodiment is that the platen 1 as an example of the sample 19 is simulated by the number of rotations during actual use and its function is inspected.

That is, as shown in FIG. 5, the motor 25A
Is a part of the sample driving means 15, and drives the platen 1 while the pressure sensor 23A is pressurized. The motor 25A is output controlled by the motor controller 25B based on the movement control data D2 output from the MPU 24. Further, as the power transmission means between the motor 25A and the platen 1, simple gear transmission or chain transmission is adopted.

Further, unlike the first embodiment, the sample table 21 is provided with a concave portion for receiving the shaft portion of the platen 1, and a partially open type is adopted for easy attachment and detachment. The rest of the configuration is the same as that of the first embodiment, and those having the same reference numerals have the same functions and will not be described.

FIGS. 6A and 6B are supplementary explanatory views of the simple object inspection apparatus according to the second embodiment of the present invention.
(A) has shown the state of the side surface which set the platen 1 in the said simple object inspection apparatus.

In FIG. 6 (a), in order to simulate the actual use state of the platen 1, a thermal paper (which may be ordinary paper) 6 is inserted between the dummy plate 23C and the platen 1.
Perform the functional inspection. In the actual use state of the platen 1, the thermal head 2 is pressed by the pressing force F toward the platen 1 via the plate spring 7 as shown in FIG.

FIG. 6B shows the contents of the memory table of the ROM 26B. In FIG. 6 (b), the basic pressure pattern PR constitutes the content of the reference data DR read from the ROM 26B. In the basic pressure pattern PR, the maximum pressure value related to the pressing force F is distributed in the central portion thereof. Further, the reference data DR serves as a criterion for judging the quality of the platen 1, and is stored in the ROM 26B.

In this way, according to the simple object inspection apparatus according to the second embodiment of the present invention, as shown in FIG.
The simple object inspection apparatus according to the embodiment is provided with a motor 25A and a motor control unit 25B, and the MPU 24 operates the motor control unit.
It controls the input / output of 25B.

For example, when the platen 1 of the thermal printer is placed on the sample table 21, the dummy plate 23C, the connecting rod 22A, the sensor pressing force adjusting unit 22B and the sensor pressing force setting unit 22C act via the MPU 24. F is added to platen 1. In addition, the platen 1 is driven by the motor control unit 25B via the MPU 24. The driving state at this time is controlled to rotate while the platen 1 is supplying the thermal paper 6 at a rotation speed suitable for the actual use state.

The reaction state such as the repulsive force from the platen 1 is detected by the pressure sensor 23A as in the first embodiment, and the force detection signal SP is output from the sensor 23A to MP.
It is output to U24.

Therefore, in the MPU 24, as in the first embodiment, the reference data DR which is the determination reference of the platen 1 is read from the ROM 26B, and the reference data DR and the reaction data D1 based on the force detection signal SP are obtained. As a result of comparison, the reaction state of the platen 1 is displayed on the display unit 27A.

As a result, the first functional inspection of the platen 1 is performed.
It becomes possible to perform the sample in a short time as in the case of the above example. Next, an object inspection method according to the second embodiment of the present invention will be described while supplementing the operation of the apparatus.

FIG. 7 is a flowchart for inspecting the platen shape according to the second embodiment of the present invention, and FIG. 8 is a supplementary explanatory view thereof. For example, in the case of simulating the platen 1 by the rotational speed at the time of actual use and inspecting its function, first, in FIG. 7, it is determined in step P1 whether or not the device is activated. The determination of the start execution at this time is made by the MPU 24. For example, the start switch 27B
Is turned on to activate the device (YES), the process proceeds to step P2. If it is not activated (NO), the activation execution command from the user or the like is waited for.

Next, in step P2, the feeding process of the thermal paper 6 is executed. At this time, when the motor 21A controls the output of the motor 21A based on the movement control data D2 from the MPU 24, the platen 1 is driven. As a result, the thermal paper 6 is Dutch-rolled between the dummy plate 23C and the platen 1, and the thermal paper 6 is moved and supplied.

Then, in step P3, the pressure information is read. At this time, the dummy plate is formed by the pressure sensor 23A including n piezoelectric elements PE1 to PEn as shown in FIG.
The pressurized state of 23C is detected, and its force detection signal SP, for example, its detection voltages V1 to V5 are plural A / D converters.
It is output to 23B.

The reaction data D from each A / D converter 23B in the hexadecimal system based on each detection voltage V1 to Vn.
1 is output to the MPU 24, and its data D1 is the RAM 26
Temporarily stored in A.

Thereafter, in step P4, the thermal paper feeding process is stopped. At this time, the motor 21A is stopped by the motor controller 25B based on the movement control data D2 from the MPU 24, and the supply of the thermal paper 6 is stopped.

Next, in step P5, the basic pressure pattern P
R is compared with the acquired pattern based on the reaction data D1. At this time, the basic pressure pattern PR as shown in FIG. 6B is read from the ROM 26B, and the acquired pattern based on the reaction data D1 is developed on the memory area of the RAM 26A. Depending on the shape of the platen 1, the reaction data D1 may be obtained as the acquisition pattern, which results in pressure failure (hereinafter referred to as pressure NG) patterns P1 to P3 as shown in FIG.

Here, in FIG. 8, the pressure NG pattern P1 has a distribution in which the maximum value of the pressure has a slack distribution, and the maximum value of the pressure is on both sides due to the composition variation of the central portion L / 2 of the platen 1 having the length L. It is distributed in.

In the pressure NG pattern P2, the maximum pressure value is concentrated and distributed in the central portion.
The maximum pressure value is extremely distributed in the central part due to the compositional variations on both sides of.

Further, in the pressure NG pattern P3, the maximum pressure values are evenly distributed, and the drum shape of the platen 1 is lost. In any case, the thermal paper 6 supplied by the platen 1 easily causes a jam or a scraped state.

Then, in step P6, the platen shape pass / fail judgment process is performed. At this time, if it is determined that the platen shape is acceptable (YES), the process proceeds to step P7.
Further, when the rejection of the platen shape is determined (NO), the process proceeds to step P8.

For example, when the acquired pattern based on the reaction data D1 corresponds to the pressure NG patterns P1 to P3, the platen shape is determined to be rejected. In addition, in the case of other acquisition patterns that are close to the reference pressure pattern PR, the platen shape is determined to be acceptable.

As a result, the MPU 24 can recognize the close contact state between the platen 1 and the dummy plate 23C. It should be noted that the platen acceptance display is given in step P7.
At this time, the platen acceptance display is performed by digital display or the like via the display unit 27A. Further, in step P8, the platen (failed) NG is displayed. At this time, an alarm device such as a buzzer may be interlocked with the digital display.

In this way, according to the object inspection method of the second embodiment of the present invention, as shown in the flowchart of FIG. 7, the acting force F supplied to the platen 1 in the sheet feeding state in step P2 is processed. In step P3, the reaction state with respect to is read out, and thereafter, in step P5, the acquisition pattern relating to the reaction data D1 based on this is compared with the reference pressure pattern PR relating to the reference data DR of the platen 1.

Therefore, the platen 1 having a different shape between the state in which the acting force F is applied as shown in FIG. 2B and the state in which the acting force F is not applied as shown in FIG. 2A.
It is possible to identify the actual shape of the platen as a single platen model simulating the acting force F without actually mounting it on the thermal printer as in the conventional example.

As a result, it becomes possible to perform a functional inspection suitable for the actual use condition in which the acting force F is applied to the platen shape apparently passed by the appearance shape inspection.

As a result, it becomes possible to eliminate the functional defects due to the compositional variation existing inside the platen 1 at the stage of parts. This makes platen 1
Reliability is improved, and it is possible to avoid spending a lot of dead time in the adjustment work of the accessory components as in the conventional example.

(3) Description of Third Embodiment FIGS. 9A and 9B are explanatory views of a simple object inspection apparatus according to a third embodiment of the present invention, and FIG. FIG. 9B is a main configuration diagram thereof, and FIG. 9B is a pressure distribution relationship diagram of a reference pressure pattern and an acquisition pattern related to pass / fail determination, respectively.

In FIG. 9A, the difference from the first and second embodiments is that in the third embodiment, two pressing force adjusting parts 22B for adjusting the pressure applied to the dummy plate 23C are used. First and second pressure gauges 221 and 222 are provided.

That is, the first and second pressure gauges 221,
The numeral 222 constitutes a part of the pressurizing means 22 and variably adjusts the pressing force F applied to the dummy plate 23C.
Further, the MPU 24 detects the thermal paper 6 based on the force detection signal SP.
The first and second pressure gauges 221 while identifying the supply state of
, 222 output control.

Further, the sensor pressing force setting section 22C includes the first and second
The acting force F of the second pressure gauges 221 and 222 is set. Since the other components and functions are the same as those in the first and second embodiments, description thereof will be omitted.

Further, in the relationship diagram between the reference pressure pattern and the acquisition pattern PX in FIG. 9B, the vertical axis represents the pressure distribution P [kg] and the horizontal axis represents the pressing position L of the platen 1. In the characteristic curve, the solid line shows the pressure distribution of the reference pressure pattern PR, and the broken line shows the pressure distribution of the acquisition pattern PX based on the reaction data D1.

Further, Pmax is the maximum pressure value and is located at the central portion L / 2 of the platen 1 in the reference pressure pattern PR. It should be noted that ± L1 is a threshold value that indicates an allowable range in which the maximum pressure value Pmax can exist, and is, for example, the boundary of the shaving occurrence position. Therefore, the central portion L / of the platen 1
If the pressure maximum value Pmax of the acquired pattern PX based on the reaction data D1 exists within the range of 2 to ± L1, the functional test of the platen 1 is passed.

Thus, according to the simple object inspection apparatus of the third embodiment of the present invention, the first object as shown in FIG.
9A, the first and second pressure gauges 221 and 222 are provided to identify the supply state of the thermal paper 6 based on the force detection signal SP. While the MPU 24 is the first and second pressure gauges 221, 2
22 outputs are controlled individually.

For example, the acting force F is applied to the platen 1 by the two or more first and second pressure gauges 221 and 222 provided through the MPU 24 for the platen 1 in which the maximum pressure value is distributed in actual use. Added. At the same time, the platen 1 is rotationally controlled by the rotational speed suitable for the actual use state.

The reaction state such as the repulsive force from the platen 1 is the same as in the first and second embodiments.
And the force detection signal SP is output from the sensor 23A to the MPU 24.

Therefore, in the MPU 24, as in the first and second embodiments, the reference data DR which is the determination reference of the platen 1 is read from the ROM 26B, and the reference pressure pattern PR and the reaction data relating to the reference data DR are read. The acquisition pattern PX based on D1 is compared, and as a result, for example, when the position where the scrape has occurred is exceeded, the failure of the platen 1 is displayed on the display unit 27A.

As a result, as compared with the first and second embodiments, the shape recognition can be performed in consideration of the allowable range of the maximum pressure value Pmax, and the functional inspection according to the model in which the platen 1 is used is performed as a sample. It becomes possible to carry out a single product in a short time.

Next, an object inspection method according to the third embodiment of the present invention will be described while supplementing the operation of the apparatus. FIG. 10 shows a processing flowchart of the platen shape inspection according to the third embodiment of the present invention.

For example, as in the second embodiment, when the platen 1 is simulated by the rotational speed during actual use and its function is inspected, first, in FIG. 10, step P1 is performed.
Then, it is determined whether or not the device is to be activated. The determination of the start execution at this time is made by the MPU 24 as in the second embodiment, and when the apparatus is started (YES), the step P is executed.
Move to 2. When it is not activated (NO), the activation execution instruction of the user or the like is waited.

Next, in step P2, the feeding process of the thermal paper 6 is executed. At this time, when the motor 21A controls the output of the motor 21A based on the movement control data D2 from the MPU 24, the platen 1 is driven. As a result, the thermal paper 6 is Dutch-rolled between the dummy plate 23C and the platen 1, and the thermal paper 6 is moved and supplied.

Then, in step P3, pressure information is read. At this time, the pressing force F based on the design value when pressing the thermal head or the like on the platen 1 is set in advance via the sensor pressing force setting unit 22C. This makes M
A predetermined acting force F is applied to the dummy plate through the PU 24, the sensor pressure setting unit 22C, and the first and second pressure gauges 221, 222.
23C, and the acting force F is variably adjusted as necessary. The MPU 24 controls the outputs of the first and second pressure gauges 221, 222 while identifying the supply state of the thermal paper 6 based on the force detection signal SP.

The reaction data D from each A / D converter 23B in the hexadecimal system based on each detection voltage V1 to Vn.
1 is output to the MPU 24, and its data D1 is the RAM 26
Temporarily stored in A.

Thereafter, in step P4, the thermal paper feeding process is stopped. At this time, the motor 21A is stopped by the motor controller 25B based on the movement control data D2 from the MPU 24, and the supply of the thermal paper 6 is stopped.

Next, at step P5, it is judged whether or not the maximum pressure value Pmax of the obtained pattern PX based on the reaction data D1 is within ± L1 with reference to the central portion L / 2 of the reference pressure pattern PR. To do. At this time, FIG.
If the maximum pressure value Pmax is within the range of ± L1 (absolute value) as shown in (YES), the process proceeds to step P6. If the maximum pressure value Pmax is outside the range of ± L1 (NO), the process proceeds to step P7.

Here, the comparison processing of the basic pressure pattern PR and the acquisition pattern PX based on the reaction data D1 is performed. At this time, the basic pressure pattern PR as shown in FIG. 6B is read from the ROM 26B, and the acquisition pattern PX based on the reaction data D1 is developed on the memory area of the RAM 26A. Note that depending on the shape of the platen 1, FIG.
The reaction data D1 in which the maximum pressure value Pmax is distributed at the slack occurrence position as shown in (b) is obtained.

As a result, the MPU 24 can recognize the close contact state between the platen 1 and the dummy plate 23C. In addition, in step P6, a platen acceptance display is displayed.
At this time, the platen acceptance display is performed by digital display or the like via the display unit 27A as in the second embodiment. Further, in step P7, the platen (fail) NG display is displayed. At this time, an alarm device such as a buzzer may be interlocked with the digital display as in the second embodiment.

As described above, according to the object inspection method of the third embodiment of the present invention, as shown in the flowchart of FIG. 10, the acting force F applied to the platen 1 in the sheet feeding state in step P2 is applied. The reaction state is step P3
In step P5, the distribution position of the maximum pressure value Pmax of the acquisition pattern PX and the distribution position of the maximum pressure value Pmax of the reference pressure pattern PR are compared in step P5.

Therefore, the platen 1 having a different shape between the state in which the acting force F is applied as shown in FIG. 2B and the state in which the acting force F is not applied as shown in FIG. 2A.
It is possible to identify the actual shape of the platen as a single platen shape simulating the pressing force F based on the design value without actually mounting the shape on the thermal printer as in the conventional example.

As a result, similar to the second embodiment, the platen shape apparently passed by the appearance shape inspection is
It is possible to perform a functional test suitable for the actual use state to which the acting force F is applied.

As a result, similarly to the second embodiment, it becomes possible to eliminate functional defects due to compositional variations and the like existing inside the platen 1 at the stage of parts. As a result, the reliability of the platen 1 is improved, and it is possible to avoid spending a lot of dead time in the adjustment work of the accessory components of the platen 1 as in the conventional example.

According to the first to third embodiments, FIG.
As shown in FIG. 5, the sensor pressure adjusting unit 22B, the sensor pressure setting unit 22C, the pressure sensor 23A, the A / D converter 23B, M
PU24, motor control unit 25B, RAM26A, ROM26B
The display unit 27A and the like are driven by the battery 28.

Therefore, the object inspection apparatus can be made compact, and its portability can be obtained, so that it can be easily carried. As a result, the restrictions on the working place and working environment in which the functional inspection of the sample 19 such as the leaf spring 7 and the platen 1 is performed are relaxed.

[0121]

As described above, according to the first simple object inspection apparatus of the present invention, the sample placing means, the pressing means, the force detecting means, the storing means, the state outputting means and the control means are provided. A force detection signal is output from the force detection means to the control means.

Therefore, the control means compares the reference data of the sample such as a leaf spring with the reaction data based on the force detection signal, and as a result, the reaction state of the sample is displayed on the state output means, or Is alerted. With this,
It is possible to perform functional tests such as repulsive force in a short time and easily on a single sample as in the appearance shape inspection of the sample without actually mounting the sample on a component such as a printer unlike the conventional example. Becomes

Further, according to the second simple object inspection apparatus of the present invention, the first simple object inspection apparatus is provided with the sample driving means, and its input / output is controlled by the control means. Therefore, the control means, similar to the first simple object inspection apparatus, compares the reference data of the sample such as the platen with the reaction data based on the force detection signal, and as a result, the reaction state of the sample is displayed on the state output means. To be done. As a result, it becomes possible to easily perform a functional test of a sample such as a platen in a short time and in a single sample under the conditions suitable for the actual use state.

Further, according to the third simple object inspection apparatus of the present invention, the input and output of the two or more pressurizing means are individually controlled by the control means. For this reason, it becomes possible to easily perform a function test according to the model in which a sample such as a platen is used in a single sample in a short time.

According to the first to third simple object inspection devices, the pressing means, the force detecting means, the control means, the sample driving means, the storing means and the state outputting means are driven by the storage battery. For this reason, the object inspection device can be made compact, and its portability can be obtained, so that it is easy to carry. This alleviates the restrictions on the work place and work environment for inspecting the sample.

Further, according to the object inspection method of the present invention, the reaction state with respect to the acting force applied to the sample in the stationary state or the driven state is detected, and thereafter the reaction data and the reference data of the sample based on this are processed. It is being compared.

Therefore, the shape of a sample such as a leaf spring or a platen having a different shape when the acting force is applied is different from the shape when the acting force is not applied, as in the conventional example. Without actually attaching it to
It is possible to identify the shape as a shape of a single sample simulating the acting force.

As a result, it becomes possible to eliminate the functional defects due to the compositional variations and the like existing inside the sample at the stage of parts. This greatly contributes to the provision of a high-quality and highly reliable simple object inspection device.

[Brief description of drawings]

FIG. 1 is a principle diagram of a simple object inspection device according to the present invention.

FIG. 2 is a principle diagram of an object inspection method according to the present invention.

FIG. 3 is an explanatory diagram of a simple object inspection device according to a first embodiment of the present invention.

FIG. 4 is a main configuration diagram of a simple object inspection device according to each embodiment of the present invention.

FIG. 5 is an explanatory diagram of a simple object inspection device according to a second embodiment of the present invention.

FIG. 6 is a supplementary explanatory diagram of the simple object inspection device according to the second embodiment of the present invention.

FIG. 7 is a flowchart for inspecting the platen shape according to the second embodiment of the present invention.

FIG. 8 is a supplementary explanatory diagram of a processing flowchart according to the second embodiment of the present invention.

FIG. 9 is an explanatory diagram of a simple object inspection device according to a third embodiment of the present invention.

FIG. 10 is a flowchart for inspecting the platen shape according to the third embodiment of the present invention.

FIG. 11 is an explanatory diagram of an object inspection method according to a conventional example.

FIG. 12 is an assembly diagram of a platen illustrating a problem in the conventional example.

[Explanation of symbols]

 11 ... Sample mounting means, 12 ... Pressurizing means, 13 ... Force detecting means, 14 ... Control means, 15 ... Sample driving means, 16 ... Storage means, 17 ... Status output means, 18 ... Storage battery, PE1 to PEn ... Plural Force detection element, F ... acting force, D1 ... reaction data, D2 ... movement control data, DR ... reference data, SP ... force detection signal.

Claims (8)

[Claims] 1. A sample placing means (11) for placing a sample (19), a pressurizing means (12) for applying an acting force (F) to the sample (19), and A force detection means (13) for detecting a reaction state and outputting a force detection signal (SP), and a control means (14) for controlling input / output of at least the pressurizing means (12) and the force detection means (13).
A simple object inspection device comprising: 2. The simple object inspection apparatus according to claim 1, wherein the sample driving means (15) drives the sample (19).
Is provided, and the control means (14) controls the sample driving means (1
A simple object inspection device characterized by controlling input / output of 5). 3. The simple object inspection apparatus according to claim 1, wherein two or more pressurizing means (12) are provided, and the control means (14) individually controls input and output of the pressurizing means (12). A simple object inspection device characterized by: 4. The simple object inspection apparatus according to claim 1, 2, or 3, further comprising a storage means (16) for storing reference data (DR) which is a reference for judging the sample (19). Simple object inspection device. 5. The simple object inspection apparatus according to claim 1, 2 or 3, further comprising a state output means (17) for outputting a reaction state of the sample (19). 6. The simple object inspection apparatus according to claim 1, 2, or 3, wherein the force detecting means (13) comprises a plurality of force detecting elements (PE1 to PEn), and the force detecting means (13).
Is provided on the side opposite to the sample (19). 7. The simple object inspection apparatus according to claim 1, 2, or 3, wherein the pressing means (12) and force detecting means (1).
3), a control means (14), a sample drive means (15), a storage means (16) and a storage battery (18) for driving a state output means (17) are provided, a simple object inspection apparatus characterized by the above. 8. A method for inspecting the shape of a sample (19) under pressure, the shape being different between the state in which the acting force (F) is applied and the state in which the acting force (F) is not applied, The action force (F) is supplied to the sample (19) in the stationary state or the driven state, the reaction state is detected from the sample (19), the reaction data (D1) based on the detection process, and the sample Reference data (DR) that is the criterion for (19)
An object inspection method characterized by performing a comparison process with