JP2010088968A - Blade exchange device for blade coater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blade exchange device for a blade coater which has a simple structure and is capable of simply changing the blade. <P>SOLUTION: The blade exchange device includes a blade loading box 23 for winding and housing the blade 6, an attaching means for attaching the blade loading box 23 to a moving means freely detachably, and a blade guide means 25 arranged on the lateral side of the blade clamp 7, wherein the blade loading box 23 is attached to the moving means through the attaching means in the exchange of the blade, the tip of the blade 6 is taken out to the blade guide means 25 from the blade loading boy 23 and the blade 6 is inserted and loaded into a blade inserting slit 10 through the blade guide means 25. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a blade replacement device for use in a blade coater, and more particularly to a blade replacement device for quickly and easily replacing the blade.

  Generally, coated paper such as printing paper, pressure-sensitive paper, and thermal paper used in catalogs and the like is produced by applying a predetermined thickness of paint on a web (base material) that is a base paper and then drying it. In this way, a machine for applying a paint to a web is called a coating machine.

  Conventionally, in such a coating machine, a blade coater is known as a coating machine that applies a predetermined thickness of paint onto a web after scraping off excessive paint with a blade after applying excessive paint once onto the web. It has been.

  FIG. 11 is a conceptual side view showing a conventional blade coater 1.

In this blade coater 1, a web 2, which is a base paper, is wound around a backing roll 3 and conveyed, and on the surface of the web 2 from a nozzle 4 a of a coating liquid supply device 4 disposed below the backing roll 1. The coating liquid 5 is supplied.
Then, after the coating liquid 5 is applied, the blades 6 are arranged in parallel to correspond to the axial direction of the backing roll 3 which is the width direction of the web 2 (perpendicular to the paper surface of FIG. 10). 6 is pressed against the coating surface of the web 2, and an excess of the applied coating liquid 5 is scraped off to form a coating liquid film having a required thickness on the surface of the web 2.

  The blade 6 is held by and fixed to a holder 8 disposed at the tip of a blade clamp 7, and the blade clamp 7 is disposed in parallel with the axis of the backing roll 3. It is fixed on the support beam 9. The support beam 9 is supported by a moving means such as a well-known support arm (not shown) that moves the blade 6 so as to approach or separate from the backing roll 3.

  On the other hand, in the blade coater 1 described above, it is necessary to periodically replace the blade 6 in accordance with the wear of the blade 6.

  When the blade 6 is replaced, as shown in FIG. 12, the operation of the backing roll 3 is temporarily stopped, and then the moving means (not shown) is operated to move the blade 6 from the backing roll 3 as indicated by the arrow A. Separate.

  Then, after releasing the clamping (fixing) of the blade 6 by the holder 8 of the blade clamp 7, the operator lifts the blade 6 as indicated by an arrow B, and removes the blade 6 from the blade insertion slit 10 of the holder 8. Remove and discard.

  Thus, after the blade 6 is taken out from the blade insertion slit 10 of the blade clamp 7 and discarded, the operator prepares a new blade 6 as shown in FIG. Is inserted into the blade insertion slit 10, and then the blade clamp 7 is operated to close the slit 10 with the holder 8, and the new blade 6 is held and fixed to the tip of the blade clamp 7. To do.

  Thereafter, the moving means (not shown) is actuated again to bring the blade 6 close to the backing roll 3 as indicated by the arrow D, thereby pressing the new blade 6 against the coating surface of the web 2 in the same manner as in FIG. The excess of the applied coating solution 5 is scraped off to form a coating solution film having a required thickness on the surface of the web 2.

  By the way, as described above, when replacing the blade of the blade coater 1, as shown in FIG. 13, the operator holds the new blade 6 in his hand and the blade insertion slit of the blade clamp 7 from above as indicated by the arrow C. 10 (actually about 2 mm gap) is inserted and inserted.

In this case, if the width of the blade 6 (length in the direction perpendicular to the paper surface in FIG. 13) is about 2 m, the operator can perform the above-described replacement work alone, but the blade 6 to be replaced can be replaced. When the width is about 3 to 5 m, two operators are required for the work.

Recently, the width of the web 2 exceeds 5 m, and the width of the web 2 is increased to 7 to 10 m. In this case, the width of the blade 6 to be replaced is about 7 to 10 m, and the number of operators required for the replacement work is 3 About 4 people are required.

  In this case, it is not only difficult and time-consuming to insert a blade 6 having a thickness of about 0.4 to 0.7 mm into a gap (blade insertion slit 10) having a width of about 2 mm in cooperation with a plurality of operators. The operation is also complicated, and the tip of the blade 6 is sharp, which causes a problem in work safety.

  Although there is an idea that the above-described blade replacement is performed by automation, the current situation is that it has not yet been realized because of the increase in cost and size of the apparatus, which may interfere with operation.

  In view of the circumstances described above, an object of the present invention is to provide a blade changer for a blade coater having a simple structure and capable of easily replacing a blade.

In order to solve the above-described problems, in the present invention, a backing roll around which a web is wound, a blade clamp that fixes a blade that is inserted into a blade insertion slit, and a blade clamp that supports the blade clamp and supports the blade roll. And a moving means for separating and contacting the blade, and after applying the coating liquid on the surface of the web wound around the backing roll, the coating liquid applied by pressing the blade onto the web surface In the blade coater that scrapes off the surplus, a blade loading box for winding and accommodating the blade, an attachment means for detachably attaching the blade loading box to the moving means, and a side of the blade clamp Blade guide means, and when moving the blade, the blade loading box is moved through the attachment means. Mounted on stage, the out lumping from the blade loading boxes the tip of the blade to the blade guide means, and the blade through the blade guide means so as to fit inserted loaded on the blade fitted in the slit.

  According to the blade coater of the blade coater described above, when replacing the blade, the blade loading box is attached to the moving means via the attaching means, and then the operator pushes out the blade wound and accommodated in the blade loading box, and the blade guide means is Since the blade is inserted into the blade insertion slit, even an operator can easily insert the blade into the narrow blade insertion slit (a gap of about 2 mm in width). Even blades can be easily replaced in a short time. Further, since a blade loading box for winding and accommodating the blade is prepared and the blade loading box is attached to the moving means via the attaching means, the structure is simple and can be provided at low cost.

  Hereinafter, an embodiment of a blade changer for a blade coater according to the present invention will be described in detail.

  FIG. 1 is a conceptual side view of a blade coater 21 equipped with a blade changer 20 (hereinafter simply referred to as “replacement device”) of the blade coater according to the present invention, particularly when the blade is separated from the backing roll 3. Indicates posture. In FIG. 1, the same parts as those in FIGS. 11 to 13 are denoted by the same reference numerals.

  The blade exchanging device 20 includes a blade clamp 7 fixed on a support beam 9 as shown in FIG. 1 and a fragmentary sectional view of FIG. Moving means 22 that moves so as to be separated from and attached to the blade 3, a blade loading box 23 in which the long blade 6 is wound and accommodated, and a blade loading box mounting means for detachably attaching the blade loading box 23 to the moving means 22 24 and blade guide means 25 disposed on the side of the blade clamp 7.

  Among these, as shown in FIG. 1, the moving means 22 for moving the blade clamp 7 so as to be in contact with and away from the backing roll 3 is a pair of opposed ones supported so as to be rotatable about the central axis P. As shown in FIG. 2, the first arm 26 and a pair of second arms that are rotatably supported at the tip of the first arm 26 via a bearing 27 and arranged to face each other. The beam 9, which comprises an arm 28 and fixes and supports the blade clamp 7, is passed between the pair of second arms 28 and fixed in position.

  Further, the above-described bearing 27 for rotatably supporting the second arm 28 on the first arm 26 is inserted into the center of the bearing 27 for guiding the long blade 6 wound and accommodated in the blade loading box 23. A hole 29 is formed.

  The first arm 26 described above is for bringing the blade 6 into and out of contact with the coating surface of the web 2 shown in FIG. 1, and the second arm 28 adjusts the pressure contact posture of the blade 6 with respect to the coating surface. Is.

On the other hand, as shown in FIG. 2, the above-described blade loading box 23 is a polygonal box body whose bottom surface is closed and whose top surface 23a is open, and a long blade 6 is wound around the bottom surface inside. Has been housed once.

The tip 6a of the blade 6 accommodated in the blade loading box 23 is taken out of the blade loading box 23 as shown in FIG. 2 and FIG. 4 shown in section GG in FIG. It is positioned in the opening 23b and has a posture capable of being pushed out toward the blade insertion hole 29 shown in FIG.

Further, a blade drop prevention arm 30 having a U-shaped cross section is provided across the upper surface 23a of the blade loading box 23 shown in FIG. 2 so as to straddle the upper surface 23a. Is fixed to the side of the blade loading box 23 by a pair of thumb screws 31.

On the other hand, the blade loading box mounting means 24 for detachably mounting the above-described blade loading box 23 to the moving means 22 is projected from the side of the first arm 26 as shown in FIGS. A pair of mounting bosses 32 having female screws formed thereon and a butterfly screw 33 threadedly engaged with the mounting bosses 32 are formed on a mounting plate 34 constituting the side of the blade loading box 23 shown in FIG. After inserting the pair of U-shaped grooves 35 into the thumbscrews 33 screwed into the mounting bosses 32, the blade loading box 23 is tightened with the first arm of the moving means 22. 26 is detachably mounted.

  As apparent from FIGS. 2 and 3, the blade 9 pushed through the plate insertion hole 29 is placed on the beam 9 at a position facing the blade insertion hole 29 that guides the long blade 6. A blade guide means 25 for smoothly guiding the tip 6a of the blade into the blade insertion slit 10 of the blade clamp 7 is provided.

  As shown in FIG. 2, the blade guide means 25 is composed of a pair of guide walls 40 and 41 that are opposed to each other and are formed in a substantially Y shape when viewed from the top surface. Located on the insertion hole 29 side, the narrow side 43 faces the blade insertion slit 10 of the blade clamp 7.

  Next, the operation of the exchange device 20 having the above-described structure will be described, and the configuration will be described in more detail.

  As shown in FIG. 1 and FIG. 2, the operator inserts the blade insertion slit 10 formed in the holder 8 of the blade clamp 7 in the same manner as in the prior art during the blade replacement posture with the blade separated from the backing roll 3. Lift out the blade to be replaced from the inside and discard it.

Next, as shown in FIGS. 2 and 3, the blade loading box 23 in which the long blade 6 is wound and loaded is attached to a pair of mounting bosses 32 serving as blade loading box mounting means 24 via a thumbscrew 33. It is attached and fixed to the first arm 26.

When the blade loading box 23 is attached, as shown in FIG. 2, the tip 6a of the blade 6 accommodated in the blade loading box 23 can be pushed out toward the blade insertion hole 29 through the blade outlet 23b. Become posture.

Thereafter, when the operator pushes out the blade 6 wound and accommodated in the blade loading box 23 and pushes the tip 6a through the blade outlet 23a, the tip 6a of the blade 6 is as shown in FIG. Then, the blade enters the blade insertion hole 29 and then advances toward the blade guide means 25.

  As described above, when the tip 6a of the blade 6 enters the blade insertion hole 29 and advances toward the blade guide means 25, the tip 6a becomes substantially Y-shaped when viewed from above as shown in FIG. The wide portion 42 of the pair of guide walls 40, 41 is gradually guided into the narrow portion 43, whereby the tip 6 a of the blade 6 is fitted to the narrow blade formed on the holder 8 of the blade clamp 7. It is smoothly guided into the insertion slit 10.

  Thereafter, the operator continues the pushing operation of the blade 6 described above, and inserts the final end 6b of the blade 6 into the blade insertion slit 10 as shown in FIG. 7, and then operates the blade clamp 7. Then, the slit 10 is closed by the holder 8 and the new blade 6 is held and fixed to the tip of the blade clamp 7.

Then, the blade replacement box 23 is finished by removing the blade loading box 23 that has finally been emptied from the pair of mounting bosses 32 as the blade loading box mounting means 24 as shown in FIG.

  FIG. 9 shows a conceptual side view of the blade coater 21 in a state in which the blade replacement operation is thus completed.

  From the state where the blade replacement operation shown in FIG. 9 is completed, the first arm 26 of the moving means 22 is operated in the direction of the arrow H, whereby the new blade 6 that has been replaced is moved to the web as shown in FIG. 2 is pressed against the coating surface 2 and the excess of the applied coating liquid 5 is scraped off to form a coating liquid film having a required thickness on the surface of the web 2.

  Needless to say, when the blade 6 is replaced again, the above-described replacement operation may be repeated.

  Therefore, according to the blade exchange device 20 described above, the blade loading box 23 is attached to the first arm 26 of the moving means 22 via the attachment means 24 at the time of blade replacement, and is then wound and accommodated in the blade loading box 23. Since the operator pushes the tip 6a of the blade 6 and inserts it into the blade insertion slit 10 via the blade guide means 25, even one operator can easily fit the blade 6 into the narrow blade insertion slit 10. The long blade 6 can be easily replaced in a short time, and a blade loading box 23 in which the blade 6 is wound and accommodated is prepared. Since this blade loading box 23 is attached to the first arm 26 of the moving means 22 via the boss 32 of the attaching means 24. The entire structure of the location it is possible to provide a simple and low cost.

  The present invention is suitable for a blade coater of a blade coater having a simple structure and allowing an operator to easily replace the blade.

FIG. 1 is a conceptual side view of a blade coater equipped with a blade changer according to the present invention. 2 is a fragmentary sectional view taken along line E in FIG. 3 is a fragmentary sectional view taken along line F of FIG. 4 is a cross-sectional view of GG in FIG. FIG. 5 is a fragmentary sectional view showing the operation of the blade exchanging device according to the present invention. FIG. 6 is a fragmentary sectional view showing the operation of the blade changing device according to the present invention. FIG. 7 is a fragmentary sectional view showing the operation of the blade exchange device according to the present invention. FIG. 8 is a fragmentary sectional view showing the operation of the blade exchange device according to the present invention. FIG. 9 is a conceptual side view of the blade coater showing a state after blade replacement by the blade replacement device of the present invention. FIG. 10 is a conceptual side view of the blade coater showing a state after blade replacement by the blade replacement device of the present invention. FIG. 11 is a conceptual side view of a conventional blade coater. FIG. 12 is a conceptual side view of a blade coater showing conventional blade replacement work. FIG. 137 is a conceptual side view of a blade coater showing conventional blade replacement work.

Explanation of symbols

2 ... Web 3 ... Backing roll 6 ... Blade 6a ... Blade tip 7 ... Blade clamp 10 ... Blade insertion slit 20 ... Blade changer 21 ... Blade coater 22 ... Moving means 23 ... Blade loading box 23a ... Upper surface 23b ... Blade removal Port 24 ... Mounting means 25 ... Blade guide means 26 ... First arm 28 ... Second arm 29 ... Blade insertion hole 30 ... Blade drop prevention arm 32 ... Mounting boss 33 ... Thumb screw 35 ... U-shaped grooves 40, 41 ... Guide wall 43 ... Narrow side

Claims (6)

A backing roll around which the web is wound, a blade clamp for fixing the blade inserted in the blade insertion slit, and a moving means for supporting the blade clamp and separating the blade from the backing roll. Then, after applying a coating liquid on the surface of the web wound around the backing roll, a blade coater that scrapes off the excess coating liquid applied by pressing the blade against the web surface,
A blade loading box for winding and accommodating the blade;
Attachment means for detachably attaching the blade loading box to the moving means;
Blade guide means disposed on the side of the blade clamp,
At the time of blade replacement, the blade loading box is attached to the moving means via the attachment means, the blade tip is pushed out from the blade loading box to the blade guide means, and the blade is moved to the blade via the blade guide means. A blade changer for a blade coater, wherein the blade changer is inserted into and inserted into an insertion slit.
The moving means includes a first arm rotatably supported, and a second arm rotatably supported at the tip of the first arm and supporting the blade clamp. A blade fitting insertion hole for guiding a blade wound and accommodated in the blade loading box is formed in a bearing that rotatably supports the first arm on the first arm. 2. A blade changer for a blade coater according to 1.
The blade loading box is a box body whose bottom surface is closed and whose top surface is open, and the blade is wound and accommodated on the bottom surface, and a blade take-out port is formed to tie up the tip of the wound blade. The blade changer for a raid coater according to claim 1, wherein:
The blade replacement device for a blade coater according to claim 3, wherein a blade drop prevention arm having a U-shaped cross section is disposed on the upper surface of the blade loading box so as to straddle the upper surface.
The blade loading box mounting means includes a mounting boss projecting from the moving means and having a female screw formed therein, a thumbscrew screwed into the mounting boss, and the blade loading box engaged with the thumbscrew The blade changer for a blade coater according to claim 1, wherein the blade changer is a U-shaped groove formed on the blade.
The blade guide means is composed of a pair of guide walls that are opposed to each other and formed in a substantially Y shape when viewed from above, and the narrow side thereof faces the blade insertion slit of the blade clamp. The blade changer for a blade coater according to claim 1.