JPH0639420A - Device for cleaning and maintaining roll in process line of strip - Google Patents

Abstract

PURPOSE:To efficiently remove foreign matters from the surface of a roll by bringing a doctor blade into contact with the roll and blowing the caught foreign matters to a sucking device with an ejecting air. CONSTITUTION:This is a doctor blade type roll cleaning and maintaining device by which the foreign matters attached to the surface of the roll in the process line of a strip 1 are removed. A protector 16 to protect the device from the overlapping of the strip 1 is provided on both sides of the device; the protector 16 corresponding to the side for catching foreign matters of the doctor blade 4 is used also as a header 6 for scavenging air; plural air ejecting nozzles to blow the foreign matters to the side are provided in the header 6; and the sucking device to suck the blown foreign matters is provided. Thus, the deterioration of surroundings and the generation of scratches on the surface of the strip due to rescattered foreign matters are prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll care process for removing foreign matters adhering to the roll surface such as a bridle roll device, a deflector roll device and a dancer roll device for winding and transporting a strip in a strip plate process line. It relates to the device.

[0002]

2. Description of the Related Art A method of removing foreign matter adhering to a roll surface of a bridle roll device, a deflector roll device, a dancer roll device, etc., for winding a strip and carrying it while controlling the tension in a strip process line. It is known that a long-sided scraper or a doctor blade is brought into contact with the roll surface along the roll axis direction on the roll surface.

Further, a holding arm for holding a doctor blade which comes into contact with the deflector roll is provided on a guide frame so as to be movable in the roll axial direction, and a method of scraping off the adhering foreign matter is greater than that of a rotating brush or a method of blowing gas. It is generally carried out from the standpoint that the scraping effect of the scraping is sure and that the scraped foreign matter is not scattered. Foreign matter scraped off by the scraper or doctor blade accumulates on the upper surface of the scraper or doctor blade depending on the mounting position of the scraper or doctor blade, the direction of the scraper, the direction of roll rotation, etc. It accumulates in the vicinity of the contact area and falls below the scraper and doctor blade. As a method of collecting and treating these foreign matters, (1) a foreign matter receiver is provided at the foreign matter falling position below the scraper and doctor blade, A method of periodically scraping out the foreign matter accumulated in the foreign matter receiver or sucking and removing it with a vacuum cleaner or the like. (2) Adjacent to the scraper, in parallel with it and facing the roll surface, A: A suction part made of a long magnet is provided to attract the magnet, or B: A large number of suction blowers are connected. Or, a method of installing and removing a suction part consisting of continuous suction holes (actual opening
1-105011). (3) A method of providing a local dust collecting hood that is opened close to the roll surface between a pair of doctor blades extending in the roll axis direction and facing each other and reciprocally slidable in the roll axis direction, and performing suction removal ( (Kaikai Sho 58-111103). (4) A cylinder provided with an opening parallel to the axis of the roll is placed close to the roll, for example, 5/100 to 10/100 mm, and foreign matter adhering to the roll surface is sharply formed at the tip of the opening. Gas that has come into contact with, separated and dropped into the cylinder is blown with gas (air etc.) from a gas blowing pipe connected to one end of the cylinder, or gas (air) is connected to one end of the cylinder with a suction pipe. There is a method of discharging the foreign matter in the cylinder by suctioning (Japanese Utility Model Publication No. 60-113116).

[0004]

However, the above-mentioned conventional method has the following problems. In the method of (1), (a) the structural space of the device is limited, and the strip is wound around most of the lower half peripheral surface of the roll, and the doctor blade is provided in contact with the lower half peripheral surface of the roll. It is impossible to install a foreign matter receiver that receives foreign matter that falls directly below the tip of the doctor blade, or when the roll shifts up and down or left and right like a bridle roll device or dancer roll device. Is difficult. (B) It is necessary to periodically remove the foreign matter accumulated in the foreign matter receiver, which requires a lot of man-hours for stopping and removing the strip plate process line.

According to the method (2) A, (a) non-magnetic foreign matter (for example, the rubber release layer of a paper-container rubber roll, non-magnetic metal powder or non-magnetic metal oxide powder) cannot be adsorbed and removed. (B) When foreign matter adsorbed on the magnet accumulates on the magnet to a certain extent or more, the adsorbing force of the magnet becomes weak and some of them may fall again. Therefore, the device is removed periodically and adsorbed on the magnet. If it is necessary to remove foreign matter and only one set of equipment can be installed for one roll due to the restrictions on the installation space, the process line of the strip is stopped or foreign matter is accumulated on the roll. The occurrence of flaws on the surface of the strip due to the transfer of foreign matter to the surface of the strip must be allowed within a certain period (time). This problem is fatal when the strip plate process line is of a completely continuous type, particularly in terms of a reduction in equipment productivity and a reduction in product acceptance rate.

In order to avoid the above problem (b), a method may be considered in which a plurality of devices are installed as far as the installation space allows, and the devices are alternately removed to remove foreign matter adsorbed and deposited on the magnets and then installed. However, especially in the case of a roll device such as a bridle roll device or a dancer roll device having a large bending circumference ratio of a strip to one roll, or when a plurality of rolls are arranged close to each other, the installation space is reduced. Even if it could be installed without it, the equipment cost, the number of man-hours for the work of mounting and removing the device or cleaning the magnet,
There are major problems in terms of workability and safety.

In the method B, the problems of the above A can be avoided, but (a) the shape, size, and arrangement of the suction holes are required for uniformly and surely sucking the foreign matter from the entire axial direction of the roll. Structure of the suction chamber surrounding the suction hole It is quite difficult to design equipment such as setting suction pressure. (B) Foreign matter is likely to adhere to and accumulate in the suction hole, the suction chamber, or the suction cylinder, and it may be necessary to periodically remove the accumulated foreign matter. Similar to (A) and (B) of A above. There is a great risk of problems.

In the method disclosed in (3), (a) in order to ensure the suction and removal effect, the foreign matter separated from the roll is dispersed in the circumferential direction of the roll surface by a pair of facing doctor blades. Is required, a device for sliding the dust collection hood back and forth in the roll axis direction is required, and the device itself is complicated, and space is required for installation. Foreign matter separated from the roll surface by the doctor blade jumps over the doctor blade at a position not covered by the dust collection hood, and may fly over the doctor blade, causing it to get on the strip surface again and cause surface defects. There are some problems.

In the method disclosed in (4), the opening of the cylindrical body having a gas blowing pipe or a gas suction pipe connected to one end thereof is arranged close to the roll. It has the same function as a doctor blade for scraping, and also has the function of receiving and removing foreign matter scraped off by the cylinder body, which makes it possible to make the entire device compact and has the advantage that it is difficult to be restricted by the installation space. Although it is an excellent method, the following drawbacks are pointed out. (B) Even if the tip of the opening is formed at an acute angle without placing the opening of the cylindrical body in contact with the roll and arranging it close to the roll, it is the same as a doctor blade that completely scrapes off foreign matter adhering to the roll surface. It is difficult to expect the action, and there is a possibility that the once-peeled foreign matter may get caught in the gap between the outer surface of the tip of the cylindrical body and the roll surface and scratch the roll surface.

Further, it is difficult to set the roll surface considering that it is a curved surface, and even if the setting is successful, it is appropriate considering the abrasion due to foreign matter attached to the roll on the outer surface of the tip end of the cylindrical opening. It is difficult to maintain and manage a large gap value. (B) In order to ensure the scraping action of foreign matter on the roll surface by the tip of the opening of the cylinder, it is important to process and maintain the tip of the opening at an acute angle, but at least for that purpose It is necessary to impart wear resistance to the tip of the opening of the tubular body, the entire tubular body is formed of a special expensive material, or complicated heat treatment is required after processing the opening,
The manufacturing cost of the cylindrical body is more expensive than the manufacturing cost of the doctor blade and the like. (C) In order to prevent the foreign matter separated from the roll from being scattered, to be surely sucked from the opening of the cylinder, and to prevent the foreign matter from adhering to and depositing on the opening of the cylinder or the bottom of the cylinder, It is necessary to maintain the negative pressure over the entire length of the part and to make the gas flow velocity inside the opening and inside the cylinder considerably high, but it is difficult to satisfy the above conditions with the method of blowing gas from one end of the cylinder, The higher the gas flow velocity inside, the lower the negative pressure in the opening, but in some cases, the positive pressure may become positive. In the method of sucking gas from one end of the cylindrical body, in order to satisfy the above condition, it is sufficient to reduce the width of the opening and the inner diameter of the cylindrical body. Foreign matter scraped from the surface of the roll that rotates at high speed at the tip may be splashed over the cylinder without being attracted to the opening due to the elasticity of the tip of the cylinder or the elasticity of the adhered foreign matter itself. is there. On the other hand, if the width of the opening is increased, in order to increase the gas flow velocity on the wall surface of the opening over the entire length of the opening, gas suction means (vacuum pump, etc.)
It is necessary to increase the capacity, and the equipment cost and operating cost will be high.

In addition to the above problems, problems common to the above methods (1) to (4) are fluctuations in tension of the strip before and after the roll, breakage of the strip, and partial suspension of the roll driving device for transporting the strip. As a result, there is a high possibility that trouble may occur in which the strip plate is sucked by the inertial force in the apparatus and collides with the apparatus for collecting and removing the foreign matter separated from the doctor blade or the roll to damage them.

The present invention solves the problems of the conventional methods as described above, and is a thin plate process suitable for a bridle device, a deflector roll device, a dancer roll device, etc. for winding and transporting a strip in a strip process line. It is an object to provide a roll care device for a line.

[0013]

SUMMARY OF THE INVENTION The present invention is a scraper type or doctor blade type roll care device for removing foreign matters adhering to the surface of a roll in a strip plate process line, and both sides along the roll care device. In addition, a protector is provided to protect the care device from spillage of the strip, and a protector that opposes the foreign matter capturing side of the doctor blade is also used as a scavenging gas header. A roll care device for a strip plate process line, characterized in that it is provided with a plurality of nozzles for blowing away the foreign matter and a suction device for sucking the blown foreign matter is provided on the side surface.

The present invention is also characterized in that the scraper or the doctor knife, the scavenging gas header and the protector are held in a roll chock of a roll to be cared for.

[0015]

According to the present invention, the bridle roll device, the deflector roll device, the dancer roll device, etc., which is disposed at the work position of the process line of the strip and conveys the strip while winding the strip along the axial direction of the roll. Arrange the scraper type or doctor blade type roll care device in the shape of a long side with its tip edge contacting the roll surface,
A plurality of scavenging gas jet nozzles are provided in the longitudinal direction of the protector / scavenging gas header to scrape off the foreign matter adhering to the roll surface and blow the accumulated foreign matter to the other end of the roll. Since a suction device for sucking is provided, (1) foreign matter separated from the roll surface can be eliminated with a small flow rate of scavenging gas regardless of whether it is magnetic or non-magnetic.
(2) The removed foreign matter is sucked and collected by the suction hood so as not to be scattered to the surroundings, and (3) the foreign matter in the suctioned gas can be removed by providing the dust removing device connected to the hood through the duct.

Therefore, unlike the conventional method, since the foreign matter does not adhere to or deposit on the portion in the strip plate processing apparatus line in the middle of the foreign matter removing apparatus, (a) the foreign matter deposited by periodically stopping the line (B) It is not necessary to remove it, and it is easy even if it is impossible to install a doctor blade by contacting the lower half peripheral surface of the roll with the strip wrapped around most of the lower half peripheral surface of the roll. (C) The device configuration in the strip plate processing line is extremely simple, requires little space, and requires almost no maintenance.

Next, according to the present invention, since protectors are provided on both sides along the doctor blade type roll care device to prevent the strip from slipping in, the doctor blade is damaged due to the slipping in of the strip. It is possible to prevent damage or drop. Further, in the present invention, since the scraper or the doctor blade, the scavenging gas header, the protector and the like can be held in the roll chock of the roll that is provided so as to be vertically and horizontally shiftable from the work position, these device members can be used. Rolls can be easily shifted without the need to remove or install them, and it is easy to apply to bridle roll devices, dancer roll devices, etc., where rolls are normally shiftable. It does not hinder maintenance.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side view showing a schematic configuration of a main part of an embodiment in which the present invention is applied to a bridle roll device for controlling the tension of a strip 1 horizontally conveyed in the direction of the arrow, and FIG. FIG. FIG. 3 is a plan view. In the figure, 1 is a strip plate, and 2a to 2c are bridging roll device tension control unit rolls which rotate in the directions of the arrows, and each shaft end is connected to a drive motor (not shown) capable of controlling rotational torque. Denoted at 3a and 3b are the deflector rolls on the input and output sides of the bridle roll device.

The doctor blade 4 extending in the longitudinal direction of the roll axis is fixed and held so that its tip edge portion contacts the roll surface in a direction opposite to the rotation direction of the roll. Reference numeral 5 represents a foreign matter scraped from the roll surface by the leading edge of the doctor blade, 6 represents a scavenging gas (air etc.) header / protector extending in the roll axial direction, and 7 represents a plurality of headers with a proper interval in the longitudinal direction of the header. Each of the technique tubes 8 is attached to the tip of each technique tube and blows away the foreign matter 5 accumulated at the tip of the doctor blade 4 toward the suction hood 9 provided at the side edge. It is a dust collection duct that sends foreign matter whose one end is sucked by the suction hood 9 to the bag filter 12 via the blower 11. And 16
Is a protector provided on the opposite side of the air header 6 with the doctor blade 4 interposed therebetween.

In the scavenging air injection nozzle 8, the injected air collides with the foreign matter 5 accumulated at the tip of the doctor blade 4, and blows it away in the direction of the suction hood 9 provided at the side end. In the above example, a plurality of technique tubes 7 extending above the tip of the doctor blade are provided at appropriate intervals in the longitudinal direction of the scavenging gas header 6, and the air injection nozzle 8 is provided at the tip of each technique tube 7. Although it was attached diagonally, the technique tube was omitted and the side view of FIG. 4 and FIG.
As shown in the plan view of FIG. 3, the jet air obliquely collides with the tip of the doctor blade 4 at an appropriate interval on the side surface of the scavenging gas header 6 on the doctor blade side, and the accumulated foreign matter 5 is directed toward the suction hood 9 at the side end. It is also possible to provide a plurality of air jet nozzles 8 oriented so as to blow toward each other. In this case, the overhanging cover 13 for preventing foreign matter from scattering is provided on the upper end of the doctor blade so that the blown foreign matter does not go over the upper end of the doctor blade 4 and reattach to the opposite roll peripheral surface.
May be provided.

Next, another embodiment of the present invention will be described with reference to FIGS. FIG. 6 is a side view, and FIG. 7 is a view on arrow AA in FIG. In a normal bridle roll machine,
In order to facilitate the passage of the strips, for example, a horizontal arrangement type bridle roll device as shown in FIG.
Except for the front and rear deflector rolls 3a and 3b whose roll top surface at the working position is located on the pass line P, and the intermediate tension control unit roll 2b, the tension control unit roll 2a,
A roll whose bottom surface is located below the pass line P in a normal working position (shown by a solid line) like 2c is, as shown by a chain double-dashed line in FIG.
The lower surface of the roll is lifted to a retracted position above the pass line P, and in this state, the strip is moved along the pass line P, that is, the front surface intermediate tension control unit roll 3b of the front and rear deflector rolls 3a and 3b. Tension control unit rolls 3a, 3 on the top surface and the retracted position (shown by the chain double-dashed line)
After passing through the bottom of c, the tension control unit rolls 3a, 3c are lowered to the working position (shown by the solid line) during normal operation, and the strip 1 is wrapped around each roll to control the tension, and the strips are arrowed. Transport in the direction of. 6 and 7, the doctor blade 4, the scavenging gas header / protector 6, the protector 16 and the suction hood 9 are supported on the roll chock 22 via the support metal 17. In this embodiment, as shown in FIG. 7, the dust collection duct 9 is divided into a movable duct 10a fixed to a suction hood and a ground-side fixed duct 10b, and a sliding sleeve 19 is attached to the tip of the fixed duct 10b on the side of the divided portion.
Is provided so as to be able to move forward and backward by the sleeve sliding drive means 21 (such as an air cylinder), and the duct flange 18 at the rear end of the movable duct 10a and the sleeve flange 20 at the front end of the sliding sleeve are brought into close contact with each other during the operation of the unit. When the rolls 2a and 2c are raised and lowered, the sliding sleeve 19 is retracted to separate the movable duct 10a from the sliding sleeve 19. According to the present embodiment configured as described above, the unit roll 2 is used for stripping work of the strip 1 inside the bridle device, maintenance work of the bridle device, and the like.
When moving up and down a and 2c, the doctor blade 4,
The above working time can be remarkably shortened without the need to remove or install the scavenging gas header / protector 6, the protector 16, the suction hood 9, and the like. Although the suction hood 9 is supported by the roll chocks 22 of the unit rolls 2a and 2c in the present embodiment, the present invention is not limited to this, and although not shown in the drawings, for example, a pedestal in which the suction hood 9 is provided on the ground side is used. It is possible to move forward and backward on the orbit,
Part of the dust collection duct 10 is configured to be expandable / contractible (for example, a bellows or inner and outer two cylinders and mutually slidable structure), and the suction hood is retracted to the retracted position when the unit rolls 2a and 2c are moved up and down. Alternatively, during normal operation, it may be advanced to the work position. Furthermore, the shift direction of the roll unit is not limited to the vertical direction, but may be any other direction such as the horizontal (horizontal) direction.

Further, in the above embodiments, the example in which the present invention is applied to the bridle roll device is described, but a roll device for a strip plate process line, such as a deflector roll or a dancer roll, for winding and transporting the strip plate is also applicable. It goes without saying that it can be appropriately modified and applied.

[0023]

The present invention has the following excellent effects. That is, a doctor blade in the form of a long piece along the axial direction of the roll surface of a bridle roll device, a deflector roll device, a dancer roll device, etc., which is arranged at the work position of the process line of the strip and conveys while winding the strip. In the roll surface adhered foreign matter removing device arranged by bringing the tip edge of the scraper into contact with the roll surface, when collecting and removing the foreign matter scraped off from the roll surface and accumulated on the doctor blade or the tip of the scraper, (1) A small amount of scavenging gas, regardless of magnetic or non-magnetic foreign matter, is easily blown off to one end in the longitudinal direction of the roll, and this is sucked by the suction hood and collected and discharged by the dust remover. It is possible to prevent the occurrence of flaws on the surface of the strip plate due to scattered foreign matter. (2) There is no need for foreign matter to adhere or accumulate in the equipment in the strip processing line, it is not necessary to periodically stop the line to remove the adhered and accumulated foreign matter, and the accumulated foreign matter exceeds the limit. There is no chance of spilling onto the roll surface again and secondary surface defects (push defects). (3) Due to tension fluctuations of the strips before and after the roll, breakage, abnormalities in some parts of the roll drive device, stoppage, etc., the strips stick over and the strip collides directly with the doctor blade device or scraper and is damaged. Accidents such as breakage or dropping can be prevented by the scavenging gas header and protector and protector provided before and after the doctor blade device and scraper.Therefore, due to the extension of the line stop time and the abnormality of the doctor blade device and scraper, the strip plate There is no fear that surface defects will increase. (4) Bridle roll device and other units The roll chock of the roll that can be shifted in any direction such as the width of the roll, the vertical direction, the horizontal direction, etc. Since it is supported, it is not necessary to remove or attach each element of the device of the present invention at the time of strip running work of the strip or maintenance of the roll device, and the time required for strip running work and maintenance can be drastically shortened. It contributes to the improvement of the operating rate of the line.

These effects are particularly great in a continuous processing line for continuously processing a strip or a completely continuous processing line.

[Brief description of drawings]

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

FIG. 2 is a view on arrow AA of FIG.

FIG. 3 is a plan view of FIG.

FIG. 4 is a side view showing another embodiment of the present invention.

FIG. 5 is a plan view showing another embodiment of the present invention.

FIG. 6 is a side view showing another embodiment of the present invention.

FIG. 7 is a view on arrow AA in FIG.

[Explanation of symbols]

 1 Strip 2 Bridle Roll Device 3 Deflector Roll 4 Doctor Blade 5 Foreign Material 6 Scavenging Gas Header 7 Support 8 Air Injection Nozzle 9 Suction Hood 10 Movable Dust Duct 11 Blower 12 Bag Filter Tower 13 Foreign Material Scatter Prevention Cover 16 Protector 18 Duct Flange 19 Sliding sleeve 20 Sleeve flange 21 Sleeve sliding drive means 22 Roll chock

Claims (2)

[Claims] 1. A scraper type or doctor blade type roll care device for removing foreign matter adhering to the surface of a roll in a strip plate process line, wherein the care device is provided on both sides along the roll care device. A protector that protects the plate from spillage is provided, and the protector that counters the foreign matter capturing side of the scraper or the doctor blade is also used as the scavenging gas header, and the protector and scavenging gas header has a plurality of nozzles that blow the foreign matter to the side surface. A roll care device for a process line of a strip, which is provided with a suction device for sucking foreign matter blown off to the side surface. 2. The roll maintenance device for a strip plate process line according to claim 1, wherein the scraper or the doctor blade, the scavenging gas header, and the protector are held in the roll chock of the roll to be cleaned.