JPH07251118A - Profile adjusting device of blade coater - Google Patents

Abstract

PURPOSE:To scrupulously perform the profile adjustment of a film of a coating liquid in the width direction of a web. CONSTITUTION:On a web 2 wound around a backing roll 1 and transported, a blade 5 for scraping off an excess part 4a of a coating liquid 4 is arranged. On the back side of the blade 5, a profile adjusting member 9 is provided. Adjusting shafts 11 pushed and pulled by a pushing/pulling mechanism 18 are arranged in the width direction of the web, and engaged with the profile adjusting member 9. At the position between arrangement pitches of the adjusting shafts 11, finely adjusting shafts 19 are arranged, which are pushed and pulled to directly give bending displacement to the blade 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a profile adjusting device for a blade coater used for applying a coating liquid to a base paper produced in a paper manufacturing factory to apply coating.

[0002]

2. Description of the Related Art A base paper produced in a paper mill is rarely used as it is, and is often further processed to be a processed paper as a product suitable for a desired purpose. There are various types of processed paper, and one of them is coated paper (coated paper). Coated paper is manufactured by the operation of applying a coating liquid to the surface of the paper for the purpose of improving the surface properties of the paper, and a blade coater is one of the coating machines used for this operation.

As the above blade coater, there is a blade coater whose example is shown in FIGS. That is, the coating liquid 4 is supplied from below the backing roll 1 to the surface of the web 2 such as a base paper or film wound around the backing roll 1 by a coating liquid supply device 3 to supply the coating liquid 4. 4 of the surplus 4a at the downstream position of the backing roll 1
The blade 5 made of a thin steel plate disposed so as to contact with the web 2 and extending in the width direction of the web is scraped off to form a coating liquid film 4b having a required thickness on the surface of the web 2.

In addition, the blade coater has an upper end portion of a pressure frame 6 to which the blade 5 is attached in order to adjust the width profile of the coating liquid film 4b formed on the surface of the web 2. A profile adjusting device 7 is provided so as to face the back surface of the blade 5.

As shown in the enlarged view of FIG. 4, the profile adjusting device 7 has a web width direction (X direction) on the upper surface of the front end portion of the base frame 8 fixed to the upper end of the pressure frame 6.
The profile adjusting member 9 such as a solid bar or a tube extending in the direction (a solid bar is shown in the figure) is attached to the blade
The rear end of the profile adjusting member 9, the front end portion of the profile adjusting member 9 is engaged with the profile adjusting member 9, and the middle portion of the profile adjusting member 9 is attached to the shaft supporting portion 8a on the base frame 8 Adjustment shafts 11 slidably supported in the direction (Y direction) and extending in the front-rear direction are arranged at a constant pitch (for example, 50 to 100 mm) in the web width direction, and the rear end side of the adjustment shaft 11 is further arranged. A nut 13 having a cylindrical outer peripheral surface screwed to the threaded portion 11a, a dial 15 connected to a rear end surface of the nut 13 via a joint 14, and a restraint for restraining the position of the nut 13 in the front-rear direction. Member 16
And a support member 17 for supporting the dial 15 is provided for each adjustment shaft 11, and the nut 13 is rotated by operating each dial 15 to adjust as shown in FIG. By bending the displacement of the profile adjusting member 9 by pushing and pulling the shaft 11 in the front-back direction, each part of the blade 5 in the width direction can be arbitrarily deformed to freely adjust the width direction profile of the coating liquid film 4b. I am allowed to do so. In FIG. 4, 10 is a guide member for guiding the displacement of the profile adjusting member 9, and 12 is a guide member.
Indicates a stopper member for retaining.

[0006]

However, in the case of the profile adjusting device 7 used in the above blade coater, in order to further improve the accuracy of profile adjustment, the arrangement pitch of the adjusting shafts 11 is made small and the push-pull mechanism is used. It is conceivable to increase the number of 18 and give a fine displacement to the blade 5 through the profile adjusting member 9, but in that case, simply increasing the number increases the number of places that are not actually used, which is wasteful. Is. Further, particularly when the profile adjusting member 9 is a metallic solid bar,
When the arrangement pitch of the adjusting shafts 11 becomes small, the solid bar becomes rather difficult to bend, whereas when the pitch is increased so that the solid bar can be easily bent, there arises a contradictory problem that there are places where profile adjustment is not effective. Therefore, conventionally, when a solid bar is used as a profile adjusting member, waste is saved,
The reality is that the arrangement pitch of the adjusting shafts 11 is selected in consideration of fine adjustment and ease of bending. Therefore, there is a profile disorder that cannot be removed, and there is still room for improvement in profile adjustment accuracy. I have left.

Therefore, according to the present invention, it is possible to remove the disturbance of the profile which could not be removed by the prior art, without increasing the number of the adjusting shafts and the push-pull mechanisms thereof, and by enabling the fine adjustment. West,
It is intended to make it possible to greatly improve accuracy.

[0008]

In order to solve the above-mentioned problems, the present invention provides a back surface of a blade arranged along the width direction of the web so as to scrape off an excess of the coating liquid applied to the surface of the web. On the side, a profile adjusting member is arranged along the blade, and the blade is subjected to bending displacement by pushing and pulling the profile adjusting member with a plurality of adjusting shafts provided at a required pitch in the web width direction. In the blade coater profile adjusting device thus configured, a fine adjustment shaft is provided at a position between the arrangement pitches of the respective adjustment shafts so as to be in direct contact with the back surface of the blade for adjustment by pushing.

A fine adjustment shaft may be arranged at a level between the fixed portion of the blade and the adjustment shaft.

Furthermore, it is preferable that the fine adjustment shaft is a screw shaft and that the fine adjustment shaft can be pushed and pulled by turning.

[0011]

When each of the adjusting shafts arranged in the web width direction is pushed and pulled, the profile adjusting member is bent and deformed, whereby each part of the blade in the width direction is arbitrarily deformed. Further, when the fine adjustment shaft between the adjustment shafts is pushed and pulled, the bending deformation is directly applied to the position between the portions where the bending deformation of the blade is applied. Therefore, the blade is finely deformed in the width direction.

Further, by disposing the fine adjustment shaft at a level between the blade fixing portion and the adjustment shaft, the whole apparatus can be compactly assembled.

Further, if the fine adjustment shaft is a screw shaft, the adjustment operation becomes easy.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show an embodiment of the present invention. As in FIGS. 3 to 5, the surplus portion 4a of the coating liquid 4 applied to the surface of the web 2 is scraped off. On the back side of the blade 5 arranged along the web width direction (X direction), a profile adjusting member 9 is arranged along the blade 5, and the adjusting shaft is arranged at a required pitch in the web width direction. In the profile adjusting device 7 of the blade coater in which the pushing and pulling mechanism 18 pushes and pulls 11 to give the bending displacement to the blade 5 via the profile adjusting member 9,
The pressure frame 6 of the blade 5 at the position between the arrangement pitches of
A fine adjustment shaft (screw shaft in this embodiment) 19 is arranged in the front-rear direction (Y direction) at a height level between the fixing portion and the adjustment shaft 11, and the tip of the fine adjustment shaft 19 is arranged. By directly threading a stepped portion 8b formed on the upper surface side of the base frame 8 into point contact with the back surface of the blade 5 and pushing and pulling the fine adjustment shaft 19 by a screwing operation.
The bending displacement is directly applied to.

In the embodiment, in order to arrange the fine adjustment shaft 19 at the height level between the adjustment shaft 11 and the blade fixing portion, the profile adjusting member 9, the nut 13 and the joint 1 are arranged.
The case where the stepped portion 8b of the base frame 8 formed due to the arrangement relationship such as 4 is screwed through is shown. However, in the case where the base frame 8 does not have the stepped portion 8b, the The fine adjustment shaft 19 may be screwed through the entire length in the front-rear direction.

When adjusting the widthwise profile of the coating liquid film 4b formed by applying the coating liquid 4 on the surface of the web 2, the push-pull operation of each adjustment shaft 11 and each fine adjustment shaft are performed. The push-pull operation of 19 is used together. That is, as in the conventional case, the adjustment shafts 11 arranged in the web width direction at a required pitch are pushed and pulled in the front-rear direction by rotating the nut 13 via the joint 14 by the operation of the dial 15, thereby adjusting the profile. Bending displacement is applied to the member 9 for arbitrary deformation of each portion in the width direction of the blade 5, and the fine adjustment shaft 19 located between the adjustment shafts 11 is pushed and pulled in the front-back direction by a screwing operation, The respective parts in the width direction of the blade 5 are directly deformed without the interposition of the profile adjusting member 9.

In the above, the tip of the fine adjustment shaft 19 is in direct contact with the blade 5, and the fine adjustment shaft 19 is also provided.
Is located between the adjusting shafts 11 arranged in the web width direction, the portion between the portions of the blade 5 where the profile adjusting member 9 is bent and deformed can be easily bent and deformed. . Therefore, the adjustment shaft 11
Also, without adding the push-pull mechanism 18, it is possible to remove the disorder of the profile which could not be removed in the past. In particular, as described above, the fine adjustment shaft 1
Since the blade 5 can be directly bent and deformed by the blade 9, even if a metal solid bar is used as the profile adjusting member 9, there is an advantage that fine adjustment can be performed, and further, there is no adjustment shaft 11. Since the blade 5 can be easily bent at the position, the arrangement pitch of the adjustment shafts 11 can be increased to reduce the number of the adjustment shafts 11.

Further, in the present invention, since the amount of bending deformation of the blade 5 can be changed by pushing and pulling the fine adjustment shaft 19, this is utilized to apply the coating liquid clogging the tip of the blade 5. 4 can remove streaks due to dust, dust, etc. Further, by pushing and pulling the fine adjustment shaft 19, the natural frequency of the blade 5 can be changed, so that vibration that disturbs the coating state is generated. If it occurs in the blade 5, it is possible to make an adjustment to avoid it.

In the above embodiment, the fine adjustment shaft 19 is
Although the case where it is arranged at the height level between the adjusting shaft 11 and the blade fixing portion is shown, for example, it may be arranged at the same height level as the adjusting shaft 11 or at a height level higher than the adjusting shaft 11. You may However, in this case, a through hole may be provided in the profile adjusting member 9 or the fine adjustment shaft 19
Since it is necessary to separately provide a member for penetrating and supporting, it is convenient to configure as shown in the above embodiment in order to make the whole compact without complicating the structure. Further, in the embodiment, the case where the screw shaft which can be pushed and pulled by turning is used as the fine adjustment shaft 19, but for example, the position can be fixed by using a wedge or the like by directly pushing and pulling. Needless to say, the shaft may be used, and other various changes may be made without departing from the scope of the present invention.

[0021]

As described above, according to the profile adjusting device for a blade coater of the present invention, the adjusting pitches of the respective adjusting shafts are arranged so as to impart bending displacement to the blade via the profile adjusting member. Since the fine adjustment shaft is arranged so that it can be pushed and pulled directly in contact with the back surface of the blade, the position between the points where bending deformation is applied to the blade through the profile adjusting member by the operation of the adjustment shaft is adjusted. It can be bent directly by operation, which allows the blade to be finely adjusted in the width direction without adding an adjustment axis, and it is possible to remove the disturbance of the profile that could not be removed in the past, and It is possible to improve accuracy, and it is especially advantageous when a solid bar that does not easily bend is adopted as the profile adjustment member. Also, with the structure arranged at a position between the adjusting axis fine adjustment shaft and blade fixing portion,
The structure of the entire apparatus can be made compact without complicating, and further, by using the screw shaft as the fine adjustment shaft, the adjustment operation can be easily performed, which is an excellent effect.

[Brief description of drawings]

FIG. 1 is a sectional side view showing an embodiment of a profile adjusting device for a blade coater of the present invention.

FIG. 2 is a schematic view taken along the line II-II of FIG.

FIG. 3 is a schematic diagram showing an example of a blade coater.

FIG. 4 is a cross-sectional view of a profile adjusting device showing a part of FIG. 3 in an enlarged manner.

5 is an operation explanatory view showing a schematic plane of FIG. 4. FIG.

[Explanation of symbols]

 2 web 4 coating liquid 4a surplus 5 blade 9 profile adjusting member 11 adjusting shaft 19 fine adjusting shaft X web width direction

Front page continued (72) Inventor Takeo Nakazawa 1-1-1, Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Ltd. Tokyo No. 1 Factory

Claims (3)

[Claims] 1. A profile adjusting member is arranged along the blade on the back side of a blade arranged along the width direction of the web so as to scrape off the excess of the coating liquid applied to the surface of the web. A profile adjusting device for a blade coater in which a bending displacement is applied to the blade by pushing and pulling the profile adjusting member with a plurality of adjusting shafts provided at a required pitch in the width direction of the web. A profile adjusting device for a blade coater, characterized in that a fine adjustment shaft capable of directly contacting the back surface of the blade is provided at a position between the arrangement pitches of 1. 2. The profile adjusting device for a blade coater according to claim 1, wherein a fine adjustment shaft is arranged at a level between the fixed portion of the blade and the adjustment shaft. 3. The blade coater profile adjusting device according to claim 1, wherein the fine adjustment shaft is a screw shaft and the fine adjustment shaft can be pushed and pulled by being rotated.