JPH07267420A - Cleaning device for sheet conveying roller - Google Patents

Abstract

PURPOSE:To provide a cleaning device for a sheet conveying roller capable of efficiently cleaning the surface of the roller. CONSTITUTION:The deposits stuck on the surface of a sheet conveying roller 1 is cleaned by a cleaning section 2 in this cleaning device for the sheet conveying roller 1. The cleaning section 2 is provided with a scraper 3 removing the deposits, a sucking means 4 sucking the removed deposits, and a pressing means 5 capable of pressing the scraper 3 to the surface of the sheet conveying roller 1 with the pressing force controlled to a specific pressure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for removing deposits adhering to the surface of a sheet transporting roll for continuously transporting sheet-like substances such as paper, plastic and film.

[0002]

2. Description of the Related Art The surface of a sheet conveying roll is easily contaminated by dust carried by the sheet itself, dust directly attached from the periphery of the sheet conveying roll, dust generated from the sheet due to friction with the sheet conveying roll, and the like. . Contamination of the sheet conveyance rolls causes defects on the surface of the conveyed sheet-like material due to the dirt, and the sheet-like material is scrapped or the sheet-like material is broken, making it impossible to continue production. Becomes Therefore, once stains adhere to the surface of the sheet transport roll, it is necessary to stop production and remove the stains.

Conventionally, as such a cleaning device for a sheet conveying roll, the one disclosed in Japanese Patent Laid-Open No. 49-38836 is known. In this sheet conveying roll cleaning device, as shown in FIG.
An arm 33 is rotatably fixed to a traversing mechanism 32 that can move in the longitudinal direction of 1. A scraper 34 is fixed to the arm 33. The scraper 34 is moved in the longitudinal direction of the sheet transport roll 31 by the traverse mechanism 32 while the scraper 34 is in contact with the sheet transport roll 31, so that the peripheral surface of the sheet transport roll 31 is moved. Is cleaned.

Further, in the apparatus disclosed in Japanese Patent Laid-Open No. 55-27097, as shown in FIG. 6, the sheet is extended widely in the longitudinal direction of the sheet conveying roll 36, but in the conveying direction of the sheet-like material 37, although the field of use is different. The adhering material scraped off by the scraper 38 facing the downstream side extends widely in the longitudinal direction of the sheet transport roll 36 from the sheet-like material 37 and faces the downstream side in the sheet-like material transporting direction and to the upstream side of the scraper 38. It was sucked by the suction port 39 arranged.

In the sheet conveying roll cleaning device shown in FIG. 5, however, the adhered matter removed from the sheet conveying roll 31 falls on the floor surface or accumulates on the scraper 34, and the sheet is conveyed again. There is a problem that the cleaning device for the sheet conveying roll cannot be arranged above the center of the sheet conveying roll 31 because it adheres to the roll 31, and the cleaning is not sufficient.

Further, in the cleaning device shown in FIG. 6, since the scraper 38 has a width equal to or larger than the width of the sheet conveying roll 36 in the longitudinal direction, the entire blade edge does not contact uniformly, and the suction port 39 also exists. Since it has the same width as the scraper, it is not possible to give a uniform flow velocity to the whole. In addition, the removed deposits are often redeposited by scattering or static electricity.

In order to solve the above problems, the applicant of the present invention has previously made a proposal as shown in FIG. 7 (Japanese Patent Laid-Open No. 5-278887). In the proposed device, the cleaning unit 42 includes a scraper 43 that removes adhered substances.
And a suction means 44 for sucking the removed adhered matter, and a moving means 4 having a traverse frame 45 for moving the cleaning section 42 in the longitudinal direction of the sheet conveying roll 41.
6 is provided. In the proposed device, the scraper 43 can always be pressed against the surface of the sheet conveying roll 41 in an optimum posture, so that the attached matter can be scraped off reliably and effectively. The adhering matter scraped off can be efficiently sucked and removed by the suction means 44.
Furthermore, by moving the removing unit 42 along the transverse frame 45 along the longitudinal direction of the sheet transport roll 41, it is possible to reliably remove the deposit over the entire length of the sheet transport roll 41.

[0008]

However, in the apparatus as proposed above, there remains a problem that it is difficult to press the scraper 43 to the surface of the sheet conveying roll 41 with a target contact pressure with high accuracy. There is. Therefore, it may be difficult to completely remove the deposits on the surface of the high-precision roll such as a metal roll having a surface roughness of about 0.2S.

The present invention focuses on the above problems,
It is an object of the present invention to provide a cleaning device for a sheet conveying roll, which can press a scraper onto the surface of the sheet conveying roll with a target contact pressure with high accuracy and can clean the surface appropriately even with a high precision roll having a small surface roughness. To aim.

[0010]

A cleaning device for a sheet conveying roll according to the present invention, which is directed to the above object, is a cleaning device for removing adhered matters adhering to the surface of a sheet conveying roll by a cleaning part. , A scraper for removing the adhered matter, and a suction means for sucking the removed adhered matter, and a contact pressure means capable of pressing the scraper on the surface of the sheet conveying roll with a contact pressure controlled to a predetermined pressure. It consists of the provided ones.

The pressure contact means has, for example, a rotary torque damper for controlling the contact pressure of the scraper with respect to the surface of the sheet conveying roll, that is, a torque damper capable of controlling the torque in the rotation direction (the rotation direction of the scraper) to a set torque. It is preferable that

Further, the scraper is held via a cushioning material, and by utilizing the elastic deformation of the cushioning material, it is possible to prevent an impact force from being applied when the scraper is brought into contact with the roll surface. Is desirable.

Further, it is desirable that the scraper support mechanism is constituted by a swinging mechanism that rotatably supports the scraper around the pins.

Further, it is desirable to provide a rotary actuator capable of rotating the scraper toward and away from the surface of the sheet conveying roll. By the rotating operation by the rotary actuator, the scraper can be moved toward and away from the roll surface separately from the contact pressure applying operation by the rotary torque damper.

[0015]

In the sheet conveying roll cleaning device as described above, the scraper is brought into pressure contact with the surface of the sheet conveying roll with a contact pressure controlled by the contact pressure means to a predetermined pressure, that is, a target optimum pressure. It The contact pressure of the scraper 3 can be adjusted to an optimum pressure according to, for example, the surface condition of the roll by adjusting or controlling the contact pressure means, so that the scraper can scrape off the adhered substances from the surface of the sheet conveying roll. It is done in the most efficient state. Therefore, it is possible to effectively remove the deposits attached to the extremely smooth surface such as the surface of the high precision roll. The adhering material scraped off by the scraper is sucked by the suction means, so that re-adhesion on the surface of the sheet conveying roll is prevented.

Further, by providing the rotary torque damper in the pressure contact means, the contact pressure of the scraper against the surface of the sheet conveying roll can be easily controlled to the optimum pressure by adjusting the pressure of the rotary torque damper.

Further, if the scraper is supported via the swinging mechanism, the scraper is always in an optimum posture with respect to the surface of the sheet conveying roll, and the entire blade edge of the scraper is uniformly pressed against the surface of the sheet conveying roll.

Further, by providing a rotary actuator for moving the scraper toward and away from the surface of the sheet conveying roll, the scraper can be advanced and retracted to the surface position of the sheet conveying roll promptly and accurately as needed.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. 1 to 4 show a sheet conveying roll cleaning device according to an embodiment of the present invention. In the figure, 1 indicates a sheet conveying roll. The cleaning unit 2 removes the deposits on the surface of the sheet transport roll 1. In the cleaning unit 2, the scraper 3 which is pressed against the surface of the sheet conveying roll 1 and removes the adhered matter by scraping, the suction means 4 for sucking the removed adhered matter, and the scraper 3 are controlled to a predetermined pressure. A pressing means 5 is provided which can press the surface of the sheet conveying roll 1 with the applied contact pressure.

The cleaning unit 2 is connected to the air cylinder mechanism 11 and can move up and down by the operation of the air cylinder mechanism 11. The air cylinder mechanism 11 is fixed to the block body 11a. A guide rail 12 extending parallel to the sheet conveying roll 1 is inserted through the block body 11a. A screw 13 extending parallel to the guide rail 12 is screwed into the block body 11a. When the handle 14 is rotated, the screw 13 is rotated, and the block body 11a screwed to the screw 13 is moved in the direction of the solid line arrow in the figure. By the movement, the cleaning unit 2 connected to the cylinder mechanism 11 is also moved in the longitudinal direction of the sheet conveying roll 1.

The suction means 4 has a suction nozzle 6 having a suction port 6a which is open facing the scraper 3, a suction duct 7 connected to the suction nozzle 6, and a suction source (not shown) (for example, a blower or a factory). Vacuum source etc.).

The pressure contact means 5 is a rotary torque damper 5a.
In addition, a rotary actuator 5b is provided in the apparatus of this embodiment. The scraper 3 approaches and separates from the sheet conveying roll 1 by the rotation of the rotary actuator 5b. Further, when the scraper 3 is brought into contact with the surface of the sheet conveying roll 1, the rotary torque damper 5a controls the contact pressure to a predetermined value.

The end portion of the scraper 3 on the side opposite to the sheet conveying roll is connected to the inside of the holding portion 8 by a pin 10 as a support mechanism. Specifically, as shown in FIG. 3, the pin 10 is supported so as to be rotatable about a pin 10 as a center of rotation, that is, swingable in the longitudinal direction of the sheet conveying roll 1.

As shown in FIG. 4, rubber 16 is provided inside the holding portion 8 as a cushioning material, and the rubber 16 is elastically deformed when the scraper 3 is pressed against the surface of the sheet conveying roll 1. Is configured. Although the rubber 16 is used as the cushioning material in this embodiment, a felt or the like may be used instead of the rubber 16. Further, it is also possible to employ a mechanical cushioning member such as a leaf spring mechanism.

Reference numeral 15 is a support member for the duct, which is the support member 1.
The numeral 5 is fixed to the block body 11a and supports the suction duct 7.

In the apparatus of this embodiment, when the scraper 3 is pressed against the surface of the sheet conveying roll 1 by the rotation of the rotary actuator 5b, the force of the rotary actuator 5b is not directly transmitted to the scraper 3, but The scraper 3 is pressed against the surface of the roll 1 with a contact pressure controlled to a predetermined pressure by the rotary torque damper 5a. By adjusting the pressure (torque) by the rotary torque damper 5a, it is possible to accurately control the desired pressure, and the scraper 3 is brought into pressure contact with the surface of the sheet conveying roll 1 at an optimum contact pressure to remove the adhered matter on the surface. The scraping can be done reliably and effectively. Therefore, the apparatus of this embodiment can exhibit sufficient removal efficiency of deposits even for a roll having a very smooth surface such as a high precision roll.

The deposit scraped off by the scraper 3 from the surface of the sheet conveying roll 1 is sucked by the suction nozzle 6.
Is sucked from the suction port 6a and is discharged to the outside of the system through the suction duct 7. Therefore, it is possible to reliably prevent the once removed adhered matter from being reattached to the surface of the sheet conveying roll 1.

Further, since rubber 16 is provided as a cushioning material in the holding portion 8 for holding the end of the scraper 3 on the side opposite to the sheet conveying roll, the scraper 3 is pressed against the surface of the sheet conveying roll 1. At this time, the rubber 16 as a cushioning material is elastically deformed by the pressure from the end of the scraper 3 on the side opposite to the sheet conveying roll. Therefore, when the scraper 3 is pressed against the surface of the sheet conveying roll 1, it is possible to prevent the buffer force from being applied to the roll, and it is possible to press the tip of the scraper 3 more effectively.

Further, by providing the scraper 3 with a swinging mechanism, the entire cutting edge of the scraper 3 is uniformly pressed against the surface of the sheet conveying roll 1. Therefore, scraper 3
The posture at the time of pressing is kept optimal, and the adhered matter from the sheet conveying roll 1 can be scraped off more efficiently.

Further, since the scraper 3 is moved toward and away from the surface of the sheet conveying roll 1 by the rotary actuator 5b, a predetermined pressing operation of the scraper 3 to the sheet conveying roll 1 can be performed quickly and reliably.

In the apparatus of the above embodiment, the scraper 3 is moved toward and away from the sheet conveying roll 1 by the rotary operation of the rotary actuator 5b. However, the cylinder mechanism 11 also having the function of approaching and separating the scraper 3 has this function. May be included.

[0032]

As described above, in the cleaning device for a sheet carrying roll of the present invention, the scraper is brought into pressure contact with the surface of the sheet carrying roll with a contact pressure controlled to a predetermined pressure with high accuracy. The pressure is optimally adjusted according to the surface condition of the roll, so that the deposit can be effectively scraped off.

Further, since the adhering material once scraped off is sucked by the suction means, it is possible to reliably prevent the adhering of the adhering material on the surface of the sheet conveying roll.

Further, since the contact pressure means has the rotary torque damper, the contact pressure of the scraper can be easily adjusted to the optimum pressure, and the optimum contact pressure of the scraper with the sheet conveying roll can be easily realized.

Further, by supporting the scraper through the cushioning material, when the scraper is pressed against the sheet conveying roll, the cushioning material is elastically deformed so that the impact force is alleviated and the scraper is more effective. It is possible to make pressure contact with the sheet conveying roll.

Further, by providing the scraper with a swinging mechanism which is rotatable in the longitudinal direction of the sheet conveying roll, the entire blade edge of the scraper is uniformly pressed against the surface of the sheet conveying roll. Therefore, the scraping efficiency of the adhering material by the scraper can be further improved.

Further, by bringing the scraper closer to and away from the surface of the sheet carrying roll by the rotary actuator, the scraper can be pressed onto the surface of the sheet carrying roll more quickly.

[Brief description of drawings]

FIG. 1 is a front view of a sheet transport roll cleaning device according to an exemplary embodiment of the present invention.

2 is a partially enlarged view of the device of FIG.

FIG. 3 is an enlarged front view of the scraper and its holding portion of the apparatus of FIG.

FIG. 4 is an enlarged vertical cross-sectional view of the scraper and the holding portion of FIG.

FIG. 5 is a front view of a conventional cleaning device.

FIG. 6 is a front view of another conventional cleaning device.

FIG. 7 is a front view of the cleaning device previously proposed by the applicant.

[Explanation of symbols]

 1 Sheet Conveying Roll 2 Cleaning Section 3 Scraper 4 Suction Means 5 Contacting Means 5a Rotary Torque Damper 5b Rotary Actuator 6 Suction Nozzle 6a Suction Port 7 Suction Duct 8 Holding Part 9 Rubber as a Buffer Material 10 Pins 11 Air Cylinder Mechanism 12 Guide Rails 13 screw 14 handle

Claims (5)

[Claims] 1. A cleaning device for removing adhering matter adhered to the surface of a sheet conveying roll by a cleaning section, wherein the cleaning section removes the adhering matter and suction means for sucking the removed adhering matter. And a contact pressure unit capable of pressing the scraper onto the surface of the sheet transfer roll at a contact pressure controlled to a predetermined pressure. 2. The cleaning device for a sheet carrying roll according to claim 1, wherein the pressure contact means has a rotary torque damper for controlling the contact pressure of the scraper with the surface of the sheet carrying roll. 3. The sheet conveying roll cleaning device according to claim 1, wherein the scraper is held via a cushioning material. 4. The cleaning device for a sheet conveying roll according to claim 1, wherein the scraper supporting mechanism is a swinging mechanism that rotatably supports the scraper around a pin. 5. The sheet transport cleaning device according to claim 1, further comprising a rotary actuator that rotates the scraper toward and away from the surface of the sheet transport roll.