JP2003105665A - Device for detecting thickness unevenness of inorganic staple fiber felt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for surely detecting the thickness unevenness of an inorganic staple fiber felt to enable the felt to be marked in the transverse direction. SOLUTION: This device has the following scheme and mechanism: there is provided a light source rectangularly to the moving direction of the inorganic staple fiber felt, the light source having a width greater than that of the felt, and the variations of the quantity of light directly transmitting through the felt are read to effect detection of the thickness unevenness of the felt, and there is also provided a marking device for directly marking marks at spots on the felt when the fact that the quantity of light is different from a set value is detected at the above spots.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a device for detecting and marking uneven thickness of inorganic short fiber felt.

[0002]

2. Description of the Related Art In the process of manufacturing an inorganic short fiber felt using a hard ceramic material such as carbon or silicon, the short fiber felt is apt to cause unevenness in thickness due to the large space inside. Since the felt with unevenness is treated as a defective product, a portion having a thickness smaller than a predetermined value was corrected in a post process. For this reason, conventionally, the felt before the inspection is wound into a roll is set and fixed on the unwind roll, and the light source between the unwind roll and the take-up roll is passed through the felt. We installed an inspection machine that received light at, converted the amount of light in the width direction of the felt into an oscilloscope as a volt value, and displayed an analog graph on the screen, and constantly monitored the volt value on the oscilloscope screen that was displayed as a reference. Marking was done by manual work at appropriate places on the felt when the bolt value outside the value was projected.

[0003]

However, in such an inspection method, the felt, which is the object to be inspected, is constantly moving, and the waveform of the bolt value displayed by the oscilloscope is always synchronized with the felt. Because the image is changing, the image generated at pinpoint (image with a bolt value outside the preset bolt value) is instantly erased, so pay close attention to the thickness unevenness at all times. Had to be monitored, which often resulted in the inconvenience of missing a specific location of the thickness unevenness. In addition, the oscilloscope screen is narrow relative to the felt width, and it is difficult to visually check the image that is instantaneously projected and accurately mark the defective portion in the felt width direction. I couldn't take my eyes off the image even once, and the eye inspection time was extremely limited due to eye fatigue, and a replacement personnel was required, and labor costs were not negligible. Further, when the moving speed of the inorganic short fiber felt was high, it was difficult to mark the defective portion in the width direction even though the marking could be made in the moving direction of the felt. The present invention is
In view of such a point, it is possible to reliably detect and mark the thickness unevenness of the inorganic short fiber felt, and in particular, the thickness unevenness of the inorganic short fiber felt that can also be applied in the width direction. It is intended to provide a detection device.

[0004]

In order to solve the above problems, the invention of claim 1 provides a light source having a felt width or more at right angles to the felt moving direction of the inorganic short fiber felt.
A marking device is provided that detects the unevenness of the felt thickness by a reading unit that reads the difference in the amount of light that directly passes through the felt, and if it detects that the amount of light is different from the set value, directly marks the felt detection location. It is a thickness unevenness detection device for inorganic short fiber felt.

According to a second aspect of the present invention, a light source having a felt width or more is provided at a right angle to the felt moving direction of the inorganic short fiber felt, and the light amount for detecting the felt thickness unevenness is read by reading the difference in the light amount directly passing through the felt. A detector is provided, the light intensity detector comprising a plurality of cameras and a divider;
The difference in the amount of light passing through the felt is detected by dividing the area through which the light source passes in the width direction into two or more by a divider, and the felt is detected when it is detected that the amount of light is different from the set value for each divided area. It is an inorganic short fiber felt thickness unevenness detection device characterized by being provided with a marking device for directly making a mark at a location.

According to a third aspect of the present invention, the felt is provided by providing a light source having a felt width or more at right angles to the felt moving direction of the inorganic short fiber felt, and reading the difference in the amount of light directly passing through the felt spun in the manufacturing line. Is provided with a plurality of cameras and a divider, and the difference in the amount of light passing through the felt is divided into two or more regions through which the light source passes in the width direction by the divider. Inorganic short fiber felt thickness unevenness detection, characterized by a marking device that directly marks the felt detection location when it detects that the amount of light differs from the set value for each divided area. It is a device.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is a process for producing a hard inorganic short fiber felt such as carbon or silicon. This inorganic short fiber felt is short fiber, and since the felt has a lot of internal space, thickness unevenness occurs. Although the thickness unevenness is easily detected and marking is performed, a preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic perspective view of an inorganic short fiber felt thickness unevenness inspection apparatus according to an embodiment of the present invention.
First, the inorganic short fiber felt A is conveyed by the belt conveyor 2 by driving the roller 1, and further conveyed to the belt conveyor 4 whose speed is synchronized with that of the conveyor 2. And
A predetermined gap portion is provided between the driven roller 1 and the roller 3, and a thickness spot detection device, which is a characteristic part of the present embodiment, is installed in the gap portion to inspect the thickness unevenness of the inorganic short fiber felt. To do. The configuration of this thickness spot detection device will be described.
The operation flow when detecting a defective part with thickness unevenness is as follows: a transmission output device that is a light source a Light receiving part (camera) b Defective light amount detection device c Area divider d Defective area marking device e
The data is taken in to the personal computer by the area divider d width direction position signal output device f length direction position signal output device g personal computer h. The detection of the felt thickness is thin when the light amount in the light receiving portion b is large, and is thick when the light amount in the light receiving portion b is small.

Here, when the speed of the inorganic short fiber felt A in the X direction is set to 2 m / min and continuous inspection is performed, the transmission type output device a explained in the operation flow at the time of defect detection is
A floodlight 7 incorporating an inverter (not shown) having a variable light source output, a pair of platform 5 and a glass 6 on the upper center of the platform 5.
The amount of transmitted light is adjusted by the variable inverter according to the type and thickness of the inorganic short fiber felt A. This inverter is LSH-L40 from Taihei Trading Co., Ltd.
HLST-40 was used as the projector. Although the projector 7 of the transmitted light output device is arranged below the felt to be inspected in this embodiment, the projector 7 may be arranged above the felt A so that dust or the like is less likely to adhere thereto. Then, the light emitted from the projector 7 passes through the glass 6 and the felt and is processed by the light receiving section b which is the reading means and the defective light amount detection device c, which is two light receiving cameras 9-1 and 9-9. The transmitted light is received at -2, and the degree of the amount of the light is processed by the defective light amount detection device c to detect whether or not it is a defective portion. This light receiving camera 9-1,
9-2 is supported by a support 8 which can be adjusted up and down and left and right, and the light-receiving camera 9 uses two PENTAX model SMC Pentax FA, lens FA50m / m, and F2.8 macro L on the left and right. Of course, the number is not limited to two, and an appropriate number may be selected according to the detection area.

The defective light amount detecting device c includes two light receiving cameras 9
-1, 9-2 corresponds to the felt width direction, and it is a configuration that can be distinguished from the arbitrarily set light amount, and a configuration that can detect defective parts other than the preset thickness range with the controller. Has become. The inorganic short fiber felt A used in the test is a silicon carbide fiber having a thickness of 14 μm and a fiber length of 50 m /
It has a thickness of 3.0 m / m manufactured in m, and in this embodiment, the felt thickness 1.2 m / m or less is set as a defective product, and the set value of the controller that digitizes the light quantity is a value corresponding to it. However, in this example, Taihei Boshoku Co., Ltd. LS-30JR is used, and it is necessary to create a conversion table in advance for the relationship between the numerical value of the controller and the thickness of the felt. It was set to 30 corresponding to 1.2m / m.

The area division detecting device d is used to identify the position in the width direction of the felt where the signal generated by the defective light amount detecting device c is defective. The light receiving cameras 9-1, 9-
If two image sensors are divided into two areas and each image signal is divided into two areas, a total of four areas are held, the maximum value of the light amount of each divided area is held, and if it is determined that the defective portion is larger than the set value, it is defective. This is a configuration for outputting a signal for operating the area marking device e. Therefore, the width of this inorganic short fiber felt A to be inspected was set to 850 m / m,
The width was 212.5 m / m. Note that the area divider d of this embodiment uses Taihei Boeki Co., Ltd. product name VIDTEC and detects division as four divisions. The number may be appropriately selected, and it is preferable that the number of divisions is large. The defective area marking device e is a device that makes it possible to visually identify the area identified by the divider. An output signal of the defective portion is output every four divisions, but it is output as a defective portion. In case of failure, the corresponding marking device e out of the four defective area marking devices e operates.

The structure of the corresponding defective area marking device e is such that the hemp fiber powder is stored in the storage container 14 and
A servo motor 15 is provided on the side of 14a, and this servo motor 15 is driven by receiving the divided defective portion output signal from the area divider d, and a brush 17 is provided around a shaft 16 connected to the servo motor 15. When the motor 15 rotates, the powder B, which is attached and is always stocked in the upper part of the storage container 14 by the rotation of the brush 17, moves to CD, and the felt A is marked with the marking agent from the opening 18. A certain powder is dropped E and lightly entangled in the defective part for marking. Here, hemp fiber powder is used as the marking agent because the inorganic short fiber felt, which is a silicon carbide-based fiber, is often used in the combustion section. This is because even if it remains, it burns and disappears, and it is harmless, and other organic substances such as pulp scraps are preferable, but it may be appropriately selected depending on the use of the felt. In addition, since the area division is divided into four,
Although the number of marking devices e is four, the number of divisions and the number of marking devices are not necessarily the same.

When the defect occurrence data is taken into the personal computer h, it is combined with the recording of the width direction position signal output device f for recording the width direction area of the defect detection unit, and
By combining with the recording of the length direction position signal output device g for recording the area in the length direction and taking it into the personal computer h, the position of the defective portion in the length direction X and the width direction is specified and the recording of the personal computer h is performed. It is recorded on the medium. Here, the signal of the area in the width direction is taken out from the divider, and the sensor of the circular scale 11 and the encoder 12 is attached to the roller 10 for the purpose of specifying the length direction X at that time, and the signal of data acquisition to the personal computer h is sent. Output. The number of divisions in the width direction is divided into four equal parts, ie, the first area k, the second area l, the third area m, and the fourth area n from the front of the drawing.

Conventionally, an oscillograph inspection screen as shown in FIG. 4 is displayed, the inspection screen changes at any time along the flow of felt, and there is a peak value corresponding to a defective portion while observing this screen. In this case, marking is done manually, and the screen in Fig. 4 shows the screen where a defective part occurred in the third area m at 8.7 m from the start point. Marking. In this case, in the present embodiment, the area division detection device d detects that a defective portion has occurred in the third area m at 8.7 m, and the output signal is the third marking device e from the front. -3 is operated to drop E the powder from the opening 18 to the inorganic short fiber felt A to lightly entangle the defective portion for marking. In order to verify this, the third area m at 8.7 m of the inorganic short fiber felt A was further divided into 8 parts and actually measured with a thickness gauge, as shown in the graph of FIG. Compared with the oscillograph inspection screen shown in (1), it can be seen that although it is upside down, it is exactly similar to the oscillograph inspection screen.

As described above, in the present embodiment, the disadvantages of the conventional method of visually confirming the defective portion of the analog display by the oscilloscope and the manual marking method are eliminated, and the automatic identification of the defective portion and the automatic marking method of the defective portion are eliminated. Therefore, the defective part is accurately marked, and the area where the thickness unevenness occurs in the output part and the thickness gauge is 8
It is easy to divide the measured thickness value into accurate data and save it. Further, in this embodiment, the area divider d
However, if the defective area marking device e is associated with each of the defective light amount detection devices c (cameras), that is, four defective light amount detection devices corresponding to four cameras and defective light amount detection devices are used.
The area divider d may not be provided as long as the marking devices are connected.

[0016]

As described above, according to the present invention,
Accurate marking by automating the identification of thickness unevenness by the camera and marking of defective thickness portion in contrast to the conventional confirmation of thickness unevenness by analog display with an oscilloscope and manual marking of defective portion The result is that the labor cost can be saved, the defective area can be detected more accurately by dividing the area, and the productivity is further improved by incorporating the present invention into the production line. To do.

[Brief description of drawings]

FIG. 1 is a perspective view showing an entire embodiment of the present invention.

FIG. 2 is a side view / cross-sectional view of the marking device in FIG.

FIG. 3 is a front / sectional view of the marking device in FIG.

FIG. 4 is a screen of an oscilloscope in a defective portion.

FIG. 5 is a graph showing measured values of the thickness of area 3 in FIG.

[Explanation of symbols]

A ... Inorganic short fiber felt, B ... Stocked marking agent powder C ... Moving marking agent powder, D ... Marking agent powder before falling E ... Marking agent powder during falling, F ... Marking part a ... Transmission output Device (light source), b ... light receiving part, c ... defective light amount detecting device, d ... area divider, e ... defective area marking device, f ... width direction position signal output device, g ... length direction position signal output device, h ... PC 1 ... Roller, 2 ... Conveyor sheet, 3 ... Roller, 4
... conveyor sheet, 5 ... pan, 6 ... glass, 7 ... projector, 8 ... support, 9 ... light receiving camera, 10 ... roller,
11 ... Circle scale, 12 ... Encoder, 13 ... Support 14 ... Storage container, 15 ... Servo motor, 16 ... Shaft, 17
... brush, 18 ... opening,

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 2F065 AA30 AA49 BB13 BB15 BB23                       DD03 GG01 JJ03 JJ05 MM03                       QQ31 SS04 SS07                 3B154 AA14 AB23 BA53 BB47 BB51                       BB76 BB77 BC42 CA13 CA16                       CA23 CA34

Claims (3)

[Claims] 1. An inorganic short fiber felt is provided with a light source having a felt width or more at right angles to the felt moving direction, and a reading means for reading the difference in the amount of light passing directly through the felt detects the thickness unevenness of the felt, and the amount of light is set to a set value. An inorganic short fiber felt thickness unevenness detection device characterized by being provided with a marking device for directly marking a felt detection position when it is detected that 2. A light source having a felt width or more is provided at a right angle to the felt movement direction of the inorganic short fiber felt, and a light amount detector is provided to detect a difference in the amount of light passing directly through the felt, thereby detecting a thickness unevenness of the felt. The light amount detector comprises a plurality of cameras and a divider, and detects the difference in the amount of light passing through the felt by dividing the region through which the light source passes in the width direction into two or more by the divider, and detecting the light amount for each divided region. Inorganic short fiber felt thickness unevenness detection device characterized by being provided with a marking device for directly marking a felt detection position when it is detected that 3. A nonuniform thickness of felt is detected by providing a light source having a felt width or more at right angles to the felt moving direction of the inorganic short fiber felt and reading the difference in the amount of light directly passing through the felt spun in the production line. Is provided with a plurality of cameras and a divider, and the difference in the amount of light passing through the felt is detected by dividing the region through which the light source passes in the width direction into two or more by the divider. An inorganic short fiber felt thickness unevenness detecting device is characterized in that a marking device is provided for directly making a mark at a felt detection position when it is detected that the amount of light is different from a set value for each divided area.