JPH0631693A - Slitter provided with defect inspecting device - Google Patents

Abstract

PURPOSE:To prevent a sheet from being wastefully cut and removed by inspecting a defective part of the sheet, and also cutting only a part removed of providing a defect along a width direction of the sheet, in the midst of rewinding the sheet cut by a slitter, without using a defect inspection exclusive use rewinder. CONSTITUTION:A defect inspecting device A formed of many detectors possible to detect a defective part over the total width of a sheet S is arranged in a part of the upstream from a cutter B for a slitter, to arrange label stickers C1 to C5 for sticking a label to the defective part of each cut sheet S1 to S5 in a part of the downstream from the cutter B, and each detector of constituting the defect inspecting device A is associated with each label sticker C1 to C5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slitter equipped with a defect inspection device capable of automatically inspecting a defect portion of a sheet while the sheet is being cut into a predetermined width and wound up. Is.

[0002]

2. Description of the Related Art Small strips, dirt and insects are attached to a manufactured strip-shaped sheet (typified by a plastic film).
Some sheets have various defects such as wrinkles, and even when this sheet is printed, the printed pattern may be misaligned or chipped. Conventionally, inspection of a sheet having such a defect portion has been performed by using a rewinder dedicated to the inspection. That is, while using the manufactured sheet as a raw sheet, while unwinding the sheet and rewinding it on the winding shaft, the sheet is passed through the front surface of the inspection plate and the defective portion is visually inspected by an inspector. Then, when a defective portion is detected, a mark such as a label is attached to this portion, the wound portion is once wound, the defective portion is cut off in a later step, and then the sheet from which the defective portion is cut is used as a raw sheet. A slit product was cut into a predetermined width by a slitter to obtain a rolled product.

As described above, the conventional method requires a dedicated rewinder for defect inspection and, at the same time, when a defect of the sheet is detected, this defect exists in a part in the width direction. In this case, since the defective portion was cut out over the entire width, the good portion was cut together with the defective portion, which was extremely uneconomical. On the other hand, the recent improvement in printing technology has increased its accuracy, and the defects in printing have decreased.In one original fabric, there are at most several defective parts, including defects in printing, In reality, it is rare that the defective portion extends over the entire width of the sheet. For this reason, the defect portion of the sheet may be visually inspected while the sheet is being wound while being cut in the slitter without using a rewinder for defect inspection. However, with this method, the defect detection (inspection) of the sheet is inaccurate, and at the same time, the winding speed of the slitter cannot be increased for visual inspection, and there is a problem that the winding efficiency decreases. is there.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned actual situation of inspecting manufactured sheets, the present invention is a method in which a sheet is cut and wound by a slitter without using a rewinder exclusively for defect inspection. In order to prevent the sheet from being unnecessarily cut, the defective portion of the sheet can be inspected and only the defective portion is cut along the width direction of the sheet. Is.

[0005]

Means for Solving the Problem The means adopted by the present invention for solving the problem is to cut a strip-shaped sheet unwound from an original roll into a predetermined width by a cutting device, In a slitter configured to be wound around each winding shaft, from a number of detectors capable of detecting a defect portion over the entire width of the sheet in a portion on the upstream side of the cutting device with reference to the flowing direction of the sheet. A defect inspection device is provided, and a marking means for marking a defect portion of each cut sheet is provided for each cut sheet at a portion downstream of the cutting device. In conjunction with a large number of detectors constituting the defect inspection device, the defect inspection device detects both the longitudinal direction and the widthwise position of the defect portion of the sheet to detect a cut sheet having the defect portion. Is that configured to apply a mark to the shortcomings portion by the mark with means.

[0006]

The defect inspection apparatus is arranged along the width direction of the sheet passing therethrough, and is provided with a large number of detectors, and each of the detectors detects a part set along the width direction. Is configured. When a defective portion of the sheet is detected by passing the sheet through the portion of the defect inspection device, only the marking means corresponding to the detector that has detected the defective portion operates to detect the defective portion. A mark is attached to the defect portion of the cut sheet, and the sheet is wound around the winding shaft as it is. That is, when the sheet has a defective portion only in a part in the width direction, only the cut sheet including the defective portion is marked, and the other cut sheets are marked as the existence of the defective portion. Absent. For this reason, among the many wound products wound with the cut sheet, only the wound product having the defect portion is marked and treated as a defective product.

[0007]

EXAMPLES The present invention will be described in more detail below with reference to examples. FIG. 1 is a diagram showing the principle of a slitter according to the present invention, FIG. 2 is a diagram showing the principle of detecting a defect portion of a sheet by the defect inspection apparatus A, and FIG. 3 is each of the cut sheets S _{1 to} S. _{FIG. 5} is a schematic view showing a state in which ₅ is divided into two winding shafts 12 and 13 and wound up. The strip-shaped sheet S unwound from the original roll R passes through the guide roll 1,
The part where the defect inspection apparatus A is provided is reached. The defect inspection device A is a device for detecting a defect portion of a sheet S that horizontally travels between a pair of guide rolls 2 and 3 arranged at a predetermined interval, and as shown in FIG. Further, it is arranged above the traveling sheet S along the width direction thereof. The defect inspection apparatus A has a number of detectors A _{1 to} A ₅ corresponding to the number of cut sheets S (five in the embodiment).
Each of the detectors A _{1 to} A ₅ detects a defect portion existing in each of the planned width portions S ′ _{1 to} S ′ ₅ of the sheet S by the later-described cutting device B. A camera device can be cited as one of the detectors, and a defect portion is detected by comparing an image of the sheet surface projected by the camera device with a regular image. Further, below the sheet S traveling on the pair of guide rolls 2 and 3, the lower illuminator 4 is provided.
And the seat S traveling along the relevant portion
The upper illuminator 5 to which the lower end portion of the defect inspection apparatus A is attached is arranged above.

The sheet S, which has been inspected by the defect inspection apparatus A for the presence or absence of a defect portion and which has passed through the portions of the guide rolls 2 and 3, enters the portion of the cutting device B through the guide roll 6. The cutting device B includes a lower blade roll 7 having an annular groove portion (not shown) and an upper blade roll 8 having a disc cutter (not shown) that enters the annular groove portion. The wound sheet S is cut by rotating the disc cutter of the upper blade roll 8. The strip-shaped sheet S unwound from the original roll R is
The cutting device B cuts the set width into a plurality of cut sheets S _{1 to} S ₅ , and at the same time, the ears E at both ends of the sheet S are cut off. The cut sheets S _{1 to} S ₅ thus cut into a plurality of pieces pass through the guide rolls 9 and 11 and are alternately wound around different winding shafts 12 and 13.

Between the lower blade roll 7 and the guide roll 9,
The first traveling path P ₁ on which the cut sheets S _1, S _3, S ₅ travel is defined, and the second traveling on which the cut sheets S _2, S ₄ travel between the lower blade roll 7 and the guide roll 11. It is the route P ₂ . As shown in FIGS. 1 and 3, the first
The travel path P ₁ is cut sheet S _1, S _3, S label sticking device C ₁ for applying labels in a portion shortcomings portion is present in the _5, C _3, C ₅ is disposed, respectively And the second
The travel path P ₂ is cut sheet S _2, labeling device for applying labels in a portion shortcomings of S ₄ are present C _2, C ₄ are disposed respectively. Each label sticking device C ₁ -C ₅ is adapted to interlock respectively with the detectors A ₁ to A ₅ constituting the defect inspection apparatus A.

In the above-mentioned slitter, each winding shaft 1
When the sheets 2 and 13 are driven and rotated, the sheet S is unwound from the original roll R, and when the sheet S passes through the portion of the defect inspection apparatus A, each detector A constituting the apparatus A is rotated. _{1 to} A ₅ according to each planned width portion S ′ _{1 of the} sheet S to be cut
Presence disadvantage of S _'5 is detected. And each detector A
_{When the} defective portion is detected by any one of _{1 to} A _5, the label sticking devices C _{1 to} C ₅ corresponding to the detector are activated after the set time has passed and include the defective portion. The label is attached only to the cut sheet, and the take-up shaft 1
It is wound around either 2 or 13.

In the slitter, the sheet width,
The cutting width or the number of cuts (the number of cut sheets obtained)
Therefore, correspondingly, if each of the detectors A _{1 to} A ₅ and each of the label applicators C _{1 to} C ₅ that compose the defect inspection apparatus A is configured to be movable, It is possible to cope with the change in the winding condition described above. The label applicators C _{1 to} C ₅ described above are an example of means for marking the defective portion of the cut sheet, and may be configured to eject an inkjet.

[0012]

In the slitter according to the present invention, a defect inspection device comprising a large number of detectors capable of detecting defect portions over the entire width of the sheet is arranged on the upstream side of the cutting device, and the downstream side of the defect inspection device. Each portion is provided with a marking means for marking a defective portion of each cut sheet, and each marking means and each detector constituting the defect inspection device are made to interlock with each other. Therefore, when the sheet is cut into a predetermined width and wound up, the defective portion of this sheet can be automatically inspected, and at the same time, when the defective portion is present only in a part of the width direction of the sheet, However, only the cut sheet having this defect is marked, and the other cut sheets are not marked. As a result, of the many wound products obtained by winding the cut sheet, only the wound product having a defective portion can be treated as a defective product, and when there is a defective portion in a part along the width direction, The sheet can be economically used because only the defective portion can be cut off. Further, during the winding of the sheet by the slitter, the defect portion of this sheet can be accurately inspected, so that the inspection accuracy of the sheet can be improved without lowering the winding efficiency, and it is exclusively for the conventionally used inspection. No need for a rewinder.

[Brief description of drawings]

FIG. 1 is a principle view of a slitter according to the present invention.

2 is a diagram showing a principle of detecting a defect portion of a sheet by the defect inspection apparatus A. FIG.

FIG. 3 is a view showing that each of the cut sheets S _{1 to} S ₅ has two winding shafts 12,
It is a schematic diagram which shows the state divided | segmented into 13 and wound up.

[Explanation of symbols]

A: Defect inspection device A _{1 to} A ₅ : Detector constituting defect inspection device B: Cutting device C _{1 to} C ₅ : Label sticker (marking means) R: Original roll 12, 13: Winding axis

Claims (1)

[Claims] 1. A slitter having a structure in which a belt-shaped sheet unwound from an original roll is cut into a predetermined width by a cutting device, and each cut sheet is wound around a winding shaft. Then, in the upstream side portion of the cutting device, a defect inspection device comprising a large number of detectors capable of detecting a defective portion over the entire width of the sheet is arranged, and in the downstream side portion of the cutting device. Marking means for marking a defect portion of each cut sheet is provided for each cut sheet, and each mark means and a large number of detectors constituting the defect inspection apparatus are linked to each other, The inspection device detects both the longitudinal direction and the widthwise position of the defect portion of the sheet, and marks only the cut sheet having the defect portion by the marking means. A slitter equipped with a defect inspection device characterized in that