JPH084601Y2 - Strip dirt detector - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention detects stains on so-called strip surfaces such as steel strips, non-ferrous materials, synthetic resin materials, and composite material strips in a cold-rolled steel sheet production line. It relates to the device.

[Conventional technology]

For example, when cold-rolled steel strips are subjected to various surface treatments to produce high-value-added products, oils, dusts, dust, etc. adhering to the surface of the steel strips are picked up by pickling or washing with a cleaning line.
Rust is removed and the surface of the steel strip is cleaned before surface treatment. In this case, it is necessary to confirm whether the surface of the steel strip has been cleaned before applying the surface treatment. This confirmation is usually done by an operator pressing a cloth or paper against the steel strip with the tip of a piece of wood or the like. Was done by visually observing.

However, this method cannot be accurately detected because it is a manual work, and if the pressing force is too strong, the steel strip will be damaged, and conversely, if the pressing force is small, dirt will be overlooked. Furthermore, since it is manual work, there are always dangers and safety issues remain.

The applicant of the present application has previously filed an application for a device that solves these problems (Japanese Utility Model Publication No. 1-107961). This device presses a white cloth against a steel strip running on a production line with a pressure roll having a circular cross section to collect dirt, and the degree of dirt is detected by a detector.

This white cloth makes line contact with the steel strip due to the circular pressure roll. Therefore, this white cloth is intermittently sent out little by little in order to uniformly attach dirt to a certain range. This is because the detection by the detector can be accurately achieved by dispersing the dirt.

[Problems to be solved by the device]

The problem with the above-mentioned conventional technique is that it is necessary to intermittently send out a white cloth little by little in order to uniformly disperse and collect dirt. This feeding is achieved by inching the motor and the brake, but such a mechanism is likely to cause a failure and is not preferable in terms of maintenance.

In addition, it is assumed that the white cloth is sent out intermittently little by little to disperse the dirt, but since the white cloth and the steel strip basically make line contact, it is not possible to disperse the dirt uniformly. It is extremely difficult in practice. Therefore, the detection result by the detector becomes uncertain.

The present invention was devised in view of these problems, and is superior in terms of mechanism, and is capable of accurately detecting dirt on strips such as steel strips by enabling dirt to be dispersed evenly and collected. It is an object to provide a device capable of performing.

[Means for solving the problem]

As means for that purpose, the feeding mechanism 1, the pressing mechanism 2 and the detector 3 are configured as main constituent elements.

The feeding mechanism 1 feeds the belt-shaped belt B from the supply reel 4 at a constant length and winds it around the take-up reel 5. The pressing mechanism 2 has a pressing head 6 that is vertically movable and rotatable and presses the belt B sent from the supply reel 4 against the strip S. Further, the detector 3 detects the degree of dirt on the belt B, which has collected dirt on the strip S.

Then, the pressing head 6, the belt B and the strip S
The polygonal shape was used for the face-to-face contact.

The winding amount of the belt B, which is determined by the amount of upward movement of the pressing head 6, and the mounting position of the detector 3 were set so that the surface of the belt B on which the dirt was sampled was positioned to face the detector 3.

[Action]

 The operation of the present invention will be described with reference to FIG.

FIG. 3 shows a state in which the pressing head 6 is lowered and the belt B is pressed against the surface of the strip S.
When the belt B is pressed against the strip S, the dirt on the strip S adheres to the belt B and is collected. In this state, since the pressing head 6 is set to have a polygonal shape, the belt B and the strip S are in surface contact with each other, so that the dirt can be uniformly collected over a certain range.

After the dirt on the strip S is completely collected, the pressing head 6 moves up to the set position, and the belt B rotates the winding reel 5.
The belt B becomes tense as it is wound up. The winding amount of the belt B is determined by the amount of upward movement of the pressing head 6, and when the belt B is in a tensioned state, the dirt collecting surface of the belt B is set to be opposed to the dirt detector 3. . Therefore, the detection of dirt by the detector 3 is accurately achieved.

In addition, the dirt on the strip S is, as described above,
Since it is evenly sampled over a certain range,
The detection by the detector 3 is achieved more accurately.

〔Example〕

 1 to 5 show an embodiment of the present invention.

The apparatus of this embodiment travels on the rail 8 by the drive mechanism 7 so as to be movable back and forth in the axial direction of the strip S, collects dirt on the strip S, and then moves backward to perform detection by the detector 3. (See FIG. 1). Also, this device is provided on both sides of the strip S in order to collect dirt on both sides of the strip S (see FIG. 2).

In the present embodiment, the feeding mechanism 1 is realized by a supply reel 4, a feed cylinder 17, a moving clamp 9, a fixed clamp 10, a pressing head 6, a take-up reel 5, a motor 11, a constant torque transmitter 12, a guide roller 13 and the like. ing.

The pressing mechanism 2 mainly includes a pressing head 6 and a pressing cylinder 14, and the pressing head 6 has a gear.
A rack 16 is provided which forms the gear 15 and meshes with the gear 15.

 The operation of the apparatus shown in this embodiment will be described below.

First, the pressing cylinder 14 is operated to lower the pressing head 6 and press the belt B onto the surface of the strip S (third part).
See figure). The pressing head 6 has a hexagonal shape (hexagonal column), and one surface thereof is set to press the strip S. Therefore, the belt B comes into surface contact with the strip S, and the strip S
It is possible to uniformly collect the dirt in a certain range.

After the dirt on the strip S is collected with the belt B, the pressing cylinder 14 is operated again to raise the pressing head 6 to the set position and the belt B is wound with the take-up reel 5 (see the imaginary line in FIG. 3). . At this time, the pressing head 6
Is rotated by the action of the gear 15 and the rack 16, and this rotation is for feeding the belt B smoothly. At this time, the take-up reel 5 is rotated by the motor 11 and the constant torque transmitter 12 such as a hysteresis clutch to maintain the belt B in a tensioned state. The surface of the belt B where the dirt is sampled is set so as to face the dirt detector 3 when the belt B is stretched. Therefore, the degree of dirt can be reliably detected by the detector 3. I can.

In the present embodiment, the belt B is made of cloth, and the detector 3 for detecting the difference in luminous intensity between the dirt-collecting surface and the non-dirt surface of the cloth belt B is used. However, the present invention is not limited to such means. For example, the belt B is made of a transparent tape and the detector 3 emits light, and an appropriate means such as detecting the degree of contamination by the transmittance of the light is adopted. obtain.

When the dirt detection is completed, the moving clamp 9 of the feeding mechanism 1 then grips the belt B at its upper limit position, and the feeding cylinder 17 lowers the belt B by a certain distance and moves the belt B of a certain length.
Is pulled out from the supply reel 4. In this supply reel 4,
Like the take-up reel 5, a motor 11 and a constant torque transmitter
12 is interlocked and rotates only when the torque from the moving clamp 9 acts. When the moving clamp 9 descends, the pressing head 6
Rotates and descends to press the belt B against the strip S again. At this time, the fixed clamp 10 located below the moving clamp 9 is open when the belt B is being fed, and grips and fixes the belt B when the feeding of the belt B is completed. Is.

Contamination of the strip S is detected by returning such a series of operations.

In this embodiment, a plurality of guide rollers 13 are provided so that the belt B can be fed smoothly.

[Effect of device]

As described above, according to the present invention, the pressing head is formed in a polygonal shape and the belt is brought into surface contact with the strip to collect the dirt, so that the dirt can be uniformly collected within a certain range, and thus the dirt can be detected more effectively. Can be achieved accurately.

As a result, unlike the prior art, it is not necessary to drive the motor or the brake to move the belt little by little in order to uniformly collect the dirt on the belt, and therefore, mechanical failure and the like are less, which is superior. There are many effects such as

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a front view thereof, FIG. 3 is a partially enlarged front view thereof, and FIGS. 4 and 5 are partially enlarged side views. Explanation of code 1: Sending mechanism, 2: Pressing mechanism, 3: Detector, 4: Supply reel,
5: Take-up reel, 6: Pressing head, 7: Drive mechanism, 8: Rail,
9: Moving clamp, 10: Fixed clamp, 11: Motor, 12: Constant torque transmitter, 13: Guide roller, 14: Push cylinder, 15: Gear, 16: Rack, 17: Feed cylinder, S: Strip, B: belt.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeru Ueki 1-chome, Mizushima Kawasaki-dori, Kurashiki City, Okayama Prefecture (no address) Inside the Mizushima Works, Kawasaki Steel Co., Ltd. (72) Yoshinari Hayashida Nishide-cho, Hyogo-ku, Kobe City 1-18 No. 1 in Kobe Funabuchi Industry Co., Ltd. (56) References

Claims (2)

[Scope of utility model registration request] 1. A feeding mechanism (1) for feeding a belt-shaped belt (B) of a certain length from a feeding reel (4) and winding it on a take-up reel (5), and the feeding reel which can be moved up and down and rotated freely. (4) a pressing mechanism (2) having a pressing head (6) for pressing the belt (B) sent out from the strip (S) onto the strip (S), and the dirt on the belt (B) from which dirt on the strip (S) has been collected And a detector (3) for detecting the degree of the above, wherein the pressing head (6) has a polygonal shape in order to bring the belt (B) into surface contact with the strip (S). 2. The winding amount and the detection of the belt (B), which is determined by the amount of upward movement of the pressing head (6) so that the surface of the belt (B) on which the dirt is sampled is positioned to face the detector (3). 2. The strip dirt detection device according to claim 1, wherein the mounting position of the container (3) is set.