JP2996186B2 - Package inspection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for inspecting a synthetic fiber package (hereinafter simply referred to as "package"), and more particularly, to an apparatus for reliably preventing unnecessary yarn of a package from entering an inspection area. The present invention relates to a package inspection apparatus capable of performing accurate and accurate appearance inspection.

[0002]

2. Description of the Related Art As a package inspection apparatus for inspecting a package, a plurality of inspection stations are provided on a package transfer line, and between each station, the weight, fluff, diameter, shape, twill, and presence or absence of a bunch winding are automatically determined. What is inspected is known. The synthetic fiber is formed by, for example, assembling 36 pieces of synthetic fibers each having a length of several μm, and if the cut fibers are broken, fine fluff is generated on the surface of the package. In order to reliably detect the fine fluff, the fluff inspection station irradiates the package with a directional halogen lamp, images the reflected light by overexposure with a CCD camera, and determines the amount of the detected fluff in advance. It is determined whether or not the package is defective by comparing with the set reference amount.

[0003]

However, the bunch winding thread formed at the end of the paper tube of the package may be unraveled or loosened while being conveyed to the inspection device. When detecting fine fluff, it may cause erroneous detection. That is, as shown in FIGS. 5 and 6, the unwound or loosened bunch winding thread W enters the inspection area A of the imaging means 11 and the bunch winding thread W
In some cases, the fluff K is hidden or the bunch winding thread W is mistakenly recognized as the fluff K.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a method for inspecting the appearance of a package using an appearance inspection means such as an image pickup means. An object of the present invention is to provide a package inspection apparatus that can surely prevent an intrusion into an inspection area and always perform an accurate package appearance inspection.

[0005]

In order to achieve the above object, the invention according to claim 1 is directed to an appearance inspection of a package end face.
Inspection means and bunch winding part of the package
Air injection means for injecting air, wherein the air injection means
Evacuate the bunch winding yarn of the package outside the inspection area
While inspecting the package end face by the appearance inspection means
This is a package inspection device to be performed. According to the present invention, the appearance of the package end face is inspected by the appearance inspection means.
Inspection of bunch winding yarn of package with injected air
Because it is evacuated outside the area, the bunch winding causes
False inspection can be reliably prevented.

According to a second aspect of the present invention, in the inspection area,
On the inspection surface of a certain package, the air injection means
It is assumed that air injection is not performed . In this invention, the injected air directly hits the inspection surface of the package.
Package inspection with the injected air.
The condition of the inspection surface is not disturbed.

According to a third aspect of the present invention, the package is pivoted around an axis.
Rotating means for rotating the package
Rotate the cage in the direction opposite to the bunch winding direction.
The appearance while performing air injection by the air injection means
It is assumed that the appearance inspection is performed by the inspection means .
In this invention, the bunch winding yarn is blown off by air injection.
While being strongly wound on the winding tube.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited to the embodiments without departing from the spirit of the present invention.

The package inspection apparatus according to the present embodiment is for inspecting a synthetic fiber yarn package, and has a plurality of inspection stations S2 to S5 in a dark room 1 as shown in FIG. . A standby station S1 is provided before the first inspection station S2, and a payout station S6 is provided immediately after the fourth inspection station S5. Each package to be the inspection target package P is inserted in the tray T, respectively.
When the inspection at all stations S2 to S5 is completed,
The sheet is sent to the immediately succeeding station collectively by a feed plate (not shown) that can move freely in the vertical direction and the feed direction of the tray T. It is assumed that the package P on the tray T has a bunch winding thread W formed by winding the thread at the lower end of the winding tube several times.

In the three inspection stations S3 to S5 on the downstream side among the four inspection stations S2 to S5, a rotating means 2 for rotating the package P for each tray T about an axis is arranged. The rotating means 2 is fixed to three tray members 3 engaged with the tray T from below, a pulley 4 fixed to a rotating shaft of the tray member 3, one motor 5, and an output shaft of the motor 5. It has a pulley 6 and a drive belt 7 that transmits the rotation of the pulley 6 to the three pulleys 4.
With such a configuration, by driving the motor 5 to rotate, the packages P in the three inspection stations S3 to S5 can be simultaneously rotated around their axes.

The rotating means 2 is provided at the inspection station S
A holding member 8 for holding the upper end of the winding tube (paper tube) of the package P in 3 to S5 is provided. Three holding members 8
Is mounted on a single support rod 9 which can move up and down, and is rotatable in substantially the same direction as the rotation direction of the package P. By rotating the package P while pressing the upper end of the winding tube with the pressing member 8, accurate inspection can be performed by preventing the rotating package P from wobble while preventing the rotating package P from falling.

For example, the first in which the rotating means 2 is disposed
In the inspection station S2, the fuzz inspection of the lower end surface Pa serving as the inspection surface of the package P is performed as follows. The fluff inspection is performed on the upper end surface and the side surface of the package P as necessary. In the fluff inspection station, as shown in FIGS. 1 and 2,
A light source 10 for irradiating a predetermined range of the lower end surface Pa in the extension direction of the lower end surface Pa of the package P is provided. The light source 10 is a halogen lamp and emits strip-shaped light having a certain width.

An imaging means (appearance inspection means) 11 for imaging an area of a radius near the lower end face from an angle different from that of the light source 10 in the extension direction of the lower end face Pa of the package P is provided. The imaging means 11 is an area sensor composed of a CCD, and has light receiving elements arranged in, for example, 512 bits horizontally and 512 bits vertically. Further, the image pickup means 11 is provided with a light control means in a lens unit, so that exposure can be adjusted.

Further, in a direction in which the lower end surface Pa of the package P extends, an air jetting means 12 for jetting air from a different angle from the light source 10 and the imaging means 11 toward the bunch winding thread W formed on the winding tube. Is provided. In the present embodiment, the imaging unit 11 and the air ejection unit 12 are arranged so as to sandwich the light source 10 when viewed in plan. As shown in FIG. 2, the air injection by the air injection means 12 is locally performed in a tangential direction of the winding tube with respect to an injection target position H at a predetermined position at a lower end portion of the winding tube, and No injection is performed on the lower end surface Pa which is the inspection surface. This air injection prevents the unwound or loosened bunch winding thread W from entering the inspection area A of the imaging unit 11.

Further, the air injection by the air injection means 12 also contributes to removing dust and dirt attached to a portion other than the inspection area A on the lower end surface Pa of the package P. That is, by the rotation of the package by the rotation unit 2 and the air injection by the air injection unit 12, dust and dirt in a region of the package lower end surface Pa before entering the inspection region A are removed.

FIG. 4 shows a processing system. The drive circuit 18 that supplies the clock signal CLK to the imaging unit 11 gives an imaging timing at a predetermined interval set in advance. Imaging means 1
1 video signal VIDEO is supplied to A
/ D converter 14. The output of the A / D converter 14 is a memory (RAM) 15, a CPU 16, an I / O1
7 and the like. A plurality of images captured at a predetermined timing are stored in the memory 1 once.
5 and a predetermined image processing is performed.

With the above configuration, the air injection means 12
While the air is jetted to the jetting target position H and the light source 10 irradiates the lower end surface Pa of the package P, while rotating the package P about its axis,
1 is imaged.

The direction of rotation of the package P by the rotating means 2 is opposite to the direction in which the bunch winding thread W is wound around the winding tube. Further, the air injection by the air injection means 12 is set to be in the direction opposite to the tangential velocity direction at the injection target position H of the rotating winding tube. As described above, while the package P (the winding tube) is rotated in the direction opposite to the winding direction of the bunch winding yarn W, the air injection is performed in the direction opposite to the tangential velocity direction at the injection target position H due to the rotation. By doing so, the bunch winding thread W can be strongly wound on the winding tube while being blown off.

The computer analyzes the image data of the imaging area obtained by the imaging means 11 and
The amount of fluff K on the lower end surface Pa is detected. That is,
Based on the obtained image data of the imaging region, an inspection region A within a predetermined range on the lower end surface Pa of the package P excluding the winding tube and the bunch winding yarn W is specified. The image data is analyzed to detect the amount of fluff. The inspection area A is, as shown in FIG. 2, a portion of the lower end surface Pa, which is the inspection surface of the package P, on the side (right side) of the winding tube and the bunch winding thread W as viewed from the imaging unit 11. It is.
The detected amount of fluff is compared with the set amount, and if it is larger than the set amount, it is determined that the package is defective.

In the present embodiment, the bunch winding thread W is retracted out of the inspection area A of the image pickup means 11 by the injected air, and the loose bunch winding thread W and the unraveled bunch winding thread W are removed from the inspection area A. Since entry into A is prevented, fluff K in inspection area A can be accurately extracted from the captured image. In addition, since air is locally injected only to the bunch winding portion and is not injected onto the lower end surface Pa which is the inspection surface, the air directly injected on the fluff K on the lower end surface Pa of the package P is hit. This can prevent erroneous inspection due to disturbance of the fluff K.

At the remaining inspection stations, a weight inspection, a shape inspection of a bulge winding or a step winding, a traversing inspection, a dirt inspection, a bunch winding presence / absence inspection, and a diameter inspection are performed as required. In each inspection station, the imaging means and the light source are arranged at positions and angles that do not affect each other.

In this embodiment, an example in which the air injection means 12 is arranged at the fluff inspection station has been described. By arranging the means as required, it becomes possible to perform an accurate inspection by retreating unnecessary yarn of the package P from a predetermined range.

[0023]

The present invention is configured as described above.
The following effects are obtained. According to the first aspect of the present invention, the bunch winding yarn of the package is formed by the injected air.
Is prevented from entering the inspection area, and an accurate package appearance inspection can be performed. According to the second aspect of the present invention, the state of the inspection surface of the package is improved by the injected air.
Precise package appearance so you don't get upset
Inspection can be performed. According to the third aspect of the invention, the air
While blowing off the bunch winding yarn by injection, onto the winding tube
Package can be more securely because it can be wound strongly
Can be retracted out of the inspection area.
You.

[Brief description of the drawings]

FIG. 1 is a side view showing a fluff inspection station according to the present embodiment.

FIG. 2 is a plan view of the package of FIG. 1 as viewed from below.

FIG. 3 is a schematic side view showing the entire inspection apparatus.

FIG. 4 is a block diagram illustrating a processing system related to fluff inspection.

FIG. 5 is a plan view of a package showing a conventional problem as viewed from below.

FIG. 6 is a plan view of a package showing a conventional problem as viewed from below.

[Explanation of symbols]

A: inspection area, H: injection target position, K: fluff, P: package, Pa: lower end face of package, T: tray, W ...
Bunch winding (bunch winding yarn), 10: light source, 11: imaging means, 12: air injection means

Claims (3)

(57) [Claims] 1. An appearance inspection for performing an appearance inspection of an end face of a package.
Inspection means and blow air to the bunch winding part of the package
Air injection means, and the air injection means
External inspection while retracting the bunch winding yarn outside the inspection area
Inspection of the package end face
Package inspection equipment. 2. Inspection of a package in the inspection area
Air injection by the air injection means is not performed on the surface
The package inspection apparatus according to claim 1, wherein 3. A rotating hand for rotating a package around an axis.
A step, and bundling the package by the rotating means.
While rotating in the direction opposite to the winding direction,
Inspection by appearance inspection means while performing air injection by
3. The package inspection apparatus according to claim 1, wherein the package inspection is performed.