CN102081049A

CN102081049A - Inspection device

Info

Publication number: CN102081049A
Application number: CN2010105108122A
Authority: CN
Inventors: 天野正树; 三上正芳; 东冈幸广; 小岛俊
Original assignee: Ushio Denki KK
Current assignee: Ushio Denki KK
Priority date: 2009-11-27
Filing date: 2010-10-13
Publication date: 2011-06-01
Also published as: JP5110071B2; JP2011112519A; KR20110059521A; TW201129794A

Abstract

The invention provides an inspection device capable of performing a stable printing state inspection no matter what the observation object is.The inspection device is used for inspecting the printing state of words or figures printed on the outer surface of an object (X), which is characterized by comprising an illumination unit, an image recognition unit (2) and a controller (4).The illumination unit comprises an LED (1) and the LED (1) can be switched to emit homogeneous light of different colors on the outer surface of the object (X).The image recognition unit (2) is used for viewing the illuminated words or figures of the object.The controller (4) receives the image information from the image recognition unit and determines whether the printing state of the words or figures is qualified or not.

Description

Testing fixture

Technical field

The present invention relates to the testing fixture of object.Especially, the testing fixture that relates to the quality of the literal of judging the surface be printed in plastic molded article or figure.

Background technology

On the cap for brush of fibertip pens such as plastic molded article, for example ball pen, be printed with literal or the figure making sales company's title or be used to represent the character of pen.This printing is carried out mechanically, automatically and continuously by bedding and padding printing machine (being also referred to as pad printer usually).But, produce the literal of printing or figure sometimes and be not printed in clearly printing error such as printing such as preposition or part disappearance.In the past, as the method for finding this defective, people used magnifier etc. to check by visual.

And there is following method in the method as mechanically carrying out print inspection: the white light of the literal of printing or figure illumination incandescent lamp or fluorescent light etc. is utilized the camera recognition image, and with benchmark image relatively to judge defective.

But, for the former method, will inevitably check error owing to tired the generation, and, exist according to the examiner is different and check that there are problems such as deviation in benchmark.

And, for the latter's method, according to the kind difference of target object, existing problems aspect the inspection precision.Especially, in target object is under the situation of record with the cap for brush of pen, different according to the color combination of the color of the cap for brush self and literal or figure, existence is the problem of recognition image well, perhaps, at the cap for brush is under the situation of transparent object such as plastics, exists perspective to see the internal structure of the cap for brush and is identified as the problem of image etc.

No. the 3274186th, [patent documentation 1] Japan special permission

Summary of the invention

For the present invention, first, a kind of problem that produces can eliminate people's visualization time the, tired influence are provided or check the testing fixture of problem of the deviation and so on of benchmark, the second, provide the influence of kind of the literal of a kind of kind that can not checked object or printing or figure etc. and the testing fixture checked reliably.

In order to solve above-mentioned problem, testing fixture involved in the present invention is the device that is used to check the printing state of the literal of the outside surface that is printed in object or figure, it is characterized in that, this testing fixture comprises: lighting unit, comprise LED, this LED can switchably send the monochromatic light of different colours to the outside surface of object; Image identification unit is used to observe the literal or the figure of illuminated object; And controller, accept the image information of this image identification unit and judge the quality of the printing state of this literal or figure.

Further, testing fixture is characterised in that described object is the cap for brush or the body of record with pen.

The invention effect

Testing fixture involved in the present invention can be according to the color of the kind of object, particularly object, the monochromatic light that sends switched on one side this object thrown light on one side, therefore can check the printing state of literal or figure all the time reliably.Particularly under the situation that object is a record such as ball pen with the cap for brush of fibertip pen or body (part relative with the cap for brush), can be according to the glow color of the color settings lighting unit of this cap for brush or body.Therefore, not only be not subjected to the influence of color, and can solve the internal structure of the cap for brush or body well, particularly penetrated with rib in the location between the cap for brush and the body under the situation of the cap for brush and by the problem of image recognition.

Description of drawings

Fig. 1 illustrates the summary structure of testing fixture involved in the present invention.

Fig. 2 illustrates the summary structure of testing fixture involved in the present invention.

Fig. 3 illustrates the enlarged drawing of LED.

Fig. 4 illustrates the object of testing fixture involved in the present invention.

Description of symbols

2: camera; 3: worktable; 4: controller; 6: light-blocking member; 10: the illumination tube; 20: pillar; 101: sidewall; 102: sidewall; 103: upper wall.

Embodiment

Fig. 1 illustrates the summary structure of testing fixture of the cap for brush of an embodiment of testing fixture involved in the present invention, the colored ball pen of the plastics system that illustrates.Fig. 2 illustrates the constitutional diagram of observing the below from the arrow A of Fig. 1.The illumination tube 10 that integral body is box is held in pillar 20.At the inside surface of the inside surface of the sidewall 101 of illumination tube 10 and sidewall 102 LED 1 (1a, 1b, 1c, 1d) as lighting unit is installed.And, camera 2 (the UL-1460SE-C-GL type that Imaging Development System (イメ one ジ Application グデベロ Star プメ Application トシステ system) company makes) as image identification unit is installed at the inside surface of the upper wall 103 of illumination tube 10.Open wide with upper wall 103 opposed lower side, and be provided with the worktable 3 that is used to be maintained fixed as the cap for brush X of the colored ball pen of plastics system of object.LED 1a, LED 1b, LED 1c, LED 1d throw light on to object X, utilize camera 2 to observe the literal or the figure of the outside surface that is printed in object X.Utilize camera 2 observed image informations to be transfused to controller 4.Store reference pattern in the controller 4 in advance, observed image information and reference pattern are compared.In addition, on illumination tube 10, the light-blocking member 6 that is used to prevent external disturbance is installed.This light-blocking member 6 and nonessential is effective but suitably be provided with in the environment that has the external disturbance influence.And, also can be used as the parts that prevent the setting sun light-blocking member 6 be set.

Fig. 3 illustrates the enlarged drawing of LED.LED for example be the small LED of RGB in abutting connection with configured parts, and the Instruction Selection by controller 4 send for example red, blue, yellow light.The luminous point of LED is for example to be the little luminous point about φ 5mm, seems in appearance and can switch the light that sends 3 kinds of colors from same position.In addition, as long as not having obstacle aspect illumination and the space, also can not adopt the LED of RGB one, but the LED of versicolor light is sent in configuration arranged side by side respectively.

For LED 1, for example, sending red light as the color of the cap for brush of object under for green, blue, light blue, black, white situation, sending blue light under the color as the cap for brush of object is orange, red situation, is to send green light under the situation of pink colour in the color as the cap for brush of object.The switching of this glow color can automatically be switched by the color of detected object thing, still, also can the color according to object manually set glow color when arranging under situation about producing in batches.

Testing fixture of the present invention is to be effective especially under the situation of the cap for brush of plastic colored ball pen at object.This is because because this cap for brush is colored according to the color of ink and has transmittance under plastic situation, therefore can have an X-rayed and see inner rib structure.Therefore, this be because, the cap for brush why kind all use without exception under the situation that white light throws light on, camera is recognition image correctly.The present invention addresses this is that by utilizing suitable monochromatic light to throw light on according to the color of the cap for brush.

For the present invention, except the kind according to object makes the glow color variation of LED, also can make the luminous intensity variations of LED.Further, LED also can be provided with IR-LED or UV-LED except RGB in the lump.

And LED is provided with the position so long as can clearly observe as the literal that checks object or the position of figure and get final product, is not limited to illustrated position, and, can carry out the position adjustment according to the inspection object.But, object for the situation of the cap for brush of record with pen under since global shape for roughly cylinder and literal or graphic printing in curved outside surface, therefore, as shown in Figure 1, preferably throw light on from the both end sides of the length direction of the cap for brush.

And testing fixture optimizely select of the present invention is stated from pad printer.Can observe printing state while utilizing pad printer to print continuously.

Fig. 4 is the schematically illustrated figure that is used to illustrate the object of action effect of the present invention.Object is the plastic ball pen cap for brush, and surface printing has the literal of " ABC " outside.(a) state of the literal of observing printing is shown normally, the state of the rib of having observed the inside that is formed at the cap for brush (b) is shown, the part that printing word (c) is shown drops and the state of failing to observe fully.

That is, (a) be the situation of selecting the glow color of LED with the color-match of cap for brush ground, (b), (c) be not with the color-match ground of the cap for brush select LED glow color situation or make the turn white situation of coloured light of LED.

Claims

1. a testing fixture is used to check the literal of the outside surface that is printed in object or the printing state of figure, and described testing fixture is characterised in that,

Described testing fixture comprises:

Lighting unit comprises LED, and this LED can switchably send the monochromatic light of different colours to the outside surface of object;

Image identification unit is used to observe the literal or the figure of illuminated object; And

Controller is accepted the image information of this image identification unit and is judged the quality of the printing state of this literal or figure.

2. testing fixture according to claim 1 is characterized in that,

Described object is the cap for brush or the body of record with pen.