JP2578006Y2 - Coating machine blade changing device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for replacing a blade of a coating machine used for applying a coating liquid to a base paper manufactured in a paper mill and performing coating processing.

[0002]

2. Description of the Related Art Base paper manufactured in a paper mill is rarely used immediately as it is, and is often further processed into 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 applying a coating liquid to the surface of paper for the purpose of improving the properties of the surface of the paper. A blade coater is one of the coating machines used in this operation.

[0003] As shown in an example in FIG. 3, a blade coater is connected to a coating liquid supply device (not shown) from below with respect to a rubber coating roll b around which a sheet of paper a to be coated with a coating liquid is wound. An excess amount of the coating liquid c supplied by the above is scraped off by a blade d formed of a thin steel plate disposed so as to be in contact with the rubber coating roll b at a downstream position thereof, and the surface of the sheet-like paper a Then, a film of the coating liquid c having a required thickness is formed.

However, since the blade d is formed of a thin steel plate, it must be replaced frequently because the blade d is liable to be abraded particularly with the speeding up of coating.

Therefore, the conventional blade coater has a blade holder e having a fixed receiving portion f and a movable pressing portion g at its tip so that the blade d can be replaced. An air cylinder h for pushing and pulling the pressing portion g is installed, and a frame j to which a profiler i is attached is further erected so that the front end thereof is directed upward, and the lower end thereof is horizontally fixed to a fixed support plate k. With the pin l, it is tiltably supported so as to approach and separate from the roll b,
Further, a fluid pressure cylinder n having a rod end connected to a bracket m on the rear side of the frame j is fixed to a support member o on a fixed side.
The frame j is tilted about the horizontal pin p by the expansion and contraction operation of the hydraulic cylinder n so that the blade d approaches the roll b or separates from the roll b. q is a stopper.

Accordingly, in FIG. 3, when the blade d is to be replaced, the profiler i is retracted, the frame j is tilted backward until it hits the stopper q, and the blade d is separated from the roll b. The cylinder h is shortened (retracted operation) to widen the space between the pressing portion g and the receiving portion f to loosen the grip of the blade d. Thereafter, the blade d is gripped by hand and removed from the tip of the frame j to remove the new blade d. Is assembled by gripping a new blade d by hand, fitting it into the blade holder e along the roll b, and moving the pressing part g forward by the air cylinder h to grip the blade d. Thereafter, the frame j is raised and the blade d is pressed against the roll b.

[0007]

However, in the above blade replacement method, since the profiler mounting portion and the blade holder portion e are integrated with the frame j, the frame j is tilted rearward and the blade After the frame j is supported by the stopper q at a position where d is slightly away from the roll b, the blade d is moved by the operation of the air cylinder h.
The blade d must be removed by hand and the blade d must be pulled out by hand, and the installation of a new blade must also be manually set at this position, and the air cylinder h must be advanced and fixed. Since the blade replacement operation is performed in a narrow place close to the roll b and the blade d is a long object, there is a problem that it takes a lot of time and labor to replace the blade, and it is necessary to perform such operation reliably. In addition, since the operation of the machine is stopped, there is a loss in operation such as a decrease in productivity.

Accordingly, the present invention is intended to improve the operation efficiency by enabling the blade to be replaced in a short time.

[0009]

According to the present invention, in order to solve the above-mentioned problems, the left and right sides of a portal frame are provided.
A hydraulic cylinder is erected, and a horizontal shaft is rotatably supported at the upper end of each piston rod of each hydraulic cylinder via a bearing, and both ends are bent in opposite directions and bent pieces are formed. Blade support arms having a length that can protrude forward and rearward of the frame are arranged in the front-rear direction at the left and right positions in the frame, and the shaft of the upper end of each of the hydraulic cylinders is provided at the center of each blade support arm. And one end of each shaft is rotatably penetrated through a slide piece slidably inserted into a guide groove provided in a vertical direction on both side walls of the frame. A drive device is connected to the end of the shaft, and a blade gripping member is attached to each end and the other end of each of the left and right blade support arms so as to detachably hold the blade. To.

[0010]

When replacing the blade, the hydraulic cylinder is shortened to lower the blade together with the blade supporting arm to a position where the blade can be rotated in the frame without interfering with the frame. At this time, since the slide piece is guided by the guide groove, it can be lowered vertically. Next, when the shaft is rotated by the driving device, the blade supporting arm and the blade gripping member are integrally rotated, and the blade supporting arm is rotated by 180 degrees so that the new blade is positioned in front of the frame. After stopping the apparatus, the hydraulic cylinder is extended and the blade supporting arm is raised to set the blade at a predetermined position.

During the coating operation, the old blade is removed from the blade gripping member located behind the frame and replaced with a new blade.

Since the blade can be replaced by raising and lowering and rotating the blade supporting arm, the replacement time can be shortened.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show an embodiment of the present invention, in which left and right side walls 2 of a fixed frame 1 having a portal structure.
The hydraulic cylinder 3 is installed with the hydraulic cylinder 3 facing upward, and a bearing portion 5 is attached to the upper end of the piston rod 4 of the hydraulic cylinder 3.
Is provided. A guide groove 6 is provided at the upper position of the side wall portion 2 vertically within a range in which the bearing portion 5 moves up and down due to expansion and contraction of the fluid pressure cylinder 3, and slides vertically within the guide groove 6 so as to be freely slidable. A piece 7 is inserted, and the outer end of a horizontal shaft 8 rotatably supported by a bearing 5 at the upper end of the piston rod 4 is rotatably penetrated through the slide piece 7, and the shaft 8 slides. The inner end opposite to the piece 7 side is fixed to the center of the blade supporting arm 9, and the blade supporting arm 9 is symmetrically disposed on the left and right.

The blade supporting arm 9 has both ends bent in opposite directions to each other, and has one bent piece 9a.
And the other bent piece 9b has a length protruding forward and backward of the frame 1, and by rotating the shaft 8 fixed to the central portion, it can be rotated in the front-rear direction inside the frame 1. It is.

Blade holding members 10a and 10b extending horizontally in the left-right direction are respectively attached to the respective ends of the bent pieces 9a and the respective ends of the bent pieces 9b of the two blade supporting arms 9 disposed on the left and right in the frame 1. , A long blade 11 is attached to both blade gripping members 10a and 10b, and the outer end of one of the right and left shafts 8 is extended to extend from the bearing portion 5. The blade 11 rotates together with the blade supporting arm 9 about the shaft 8 by the driving device 13, and is driven by the hydraulic cylinder 3 along the guide groove 6 of the side wall 2. Be able to go up and down.

With the blade 11 attached to the blade holding members 10a and 10b, the bent piece 9a or 9b (the bent piece 9a in the figure) at one end of the blade supporting arm 9 is positioned in front of the frame 1, and then When the fluid pressure cylinder 3 is extended to the upper limit stroke end, the blade 11 is set to a position where the blade 11 is pressed against the sheet-like paper 15 on the surface of the rubber-coated roll 14 as shown in the figure, and the blade 11 is pressed against the paper 15 by the profiler 16. .

In this state, when the coating liquid 17 is supplied from a lower position by a coating liquid supply device (not shown), the surplus of the coating liquid 17 applied to the surface of the paper 15 is continuously scraped off by the blade 11. Thus, a coating liquid film having a predetermined thickness is formed.

The blade 11 worn in such an operation
When it is necessary to replace the blade, the profiler 16 is retracted, and then the fluid pressure cylinder 3 is shortened from the state shown by the solid line in the figure to move the blade supporting arm 9 via the shaft 8 to the position indicated by the two-dot chain line. Down to At this time, since the slide piece 7 slides down the guide groove 6 provided in the side wall 2 of the frame 1, the blade supporting arm 9 can move down vertically.

When the blade supporting arm 9 is lowered to the lower limit stroke end of the fluid pressure cylinder 3, the shaft 8 is immediately rotated by the driving device 13 to rotate the blade supporting arm 9 by 180 degrees. At the same time, another blade gripping member 10b waiting on the rear side is positioned on the front side of the frame 1, and at the same time, the fluid pressure cylinder 3 is extended and the blade supporting arm 9 is raised, and the bent piece 9
A new blade 11 attached to the blade gripping member 10b at the tip of b is set to the working position. Thus, the blade 11 can be replaced immediately, and the replacement can be easily performed during operation without stopping the operation of the machine.

When the replacement of the blade 11 is completed, the worn out old blade 11 is positioned behind the frame 1, so that the blade gripping member 1 is in operation.
The blade 11 older than 0a is pulled out and removed, a new blade 11 is assembled, and the blade 11 is kept on standby for the next blade replacement.

In the blade exchanging device of the present invention, the blade 1 is tilted because the blade holding members 10a and 10b are independently supported from the frame 1 and supported by the rotatable and vertically movable blade supporting arm 9. The replacement of the blade 11 can be performed easily, and the replacement can be performed in a short time.

Although the drive device 13 is shown as being connected to only one shaft 8, the drive devices may be connected to the left and right shafts 8, respectively.
It is needless to say that the blade 11 can be assembled to the 10b by a one-touch insertion method other than the illustrated screwing, and that various changes can be made without departing from the scope of the present invention.

[0024]

As described above, according to the blade changing device of the coating machine of the present invention, the horizontal shaft is rotated on the upper ends of the piston rods of the fluid pressure cylinders installed on the right and left sides of the portal frame. The center part of the blade support arm, which is freely supported and is formed by bending both ends in opposite directions,
The left and right blade supporting arms are fixed to each end of the left and right shafts, and the left and right blade supporting arms are arranged in parallel in the front-rear direction, and a blade gripping member is provided at each one end and each other end of the left and right blade supporting arms. Attached, each blade is attached to each blade gripping member in a horizontal state, the profiler on the frame and the blade gripping member are separate, so that the blade side can be raised and lowered and rotated in the frame, When replacing a worn blade with a new blade,
Using a hydraulic cylinder, lower the blade with the blade supporting arm via the shaft, then rotate the blade with the blade supporting arm 180 degrees, and then raise the blade with the blade supporting arm via the shaft with the hydraulic cylinder. The blade can be easily replaced by replacing the blade without having to tilt the frame, and the blade can be removed from the blade gripping member and attached to the blade gripping member at the rear of the frame. Therefore, since the blade can be detached separately from the blade replacing operation, it is possible to achieve an excellent effect that the attachment and detachment to the blade holding member can be efficiently performed in a wide place.

[Brief description of the drawings]

FIG. 1 is a front view of a blade changing device of a coating machine according to the present invention.

FIG. 2 is a side view of FIG. 1, wherein (a) is a view taken along the line AA of FIG. 1, and (b) is a view taken along the line BB of FIG.

FIG. 3 is a schematic view showing an example of a conventional blade changing device of a coating machine.

[Description of Signs] 1 Frame 2 Side wall 3 Fluid pressure cylinder 4 Piston rod 5 Bearing 6 Guide groove 7 Slide piece 8 Shaft 9 Blade supporting arm 9a, 9b Bending piece 10a, 10b Blade holding member 11 Blade 13 Drive device 16 Profiler

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-1-139171 (JP, A) JP-A-1-254276 (JP, A) JP-A-2-229576 (JP, A) JP-A-3- 26364 (JP, A) JP-A-5-169009 (JP, A) JP-A-6-31871 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B05C 7/00-21 / 00 D21H 23/34 B05C 5/00-5/02

Claims (1)

(57) [Scope of request for utility model registration] 1. On both left and right sides in a frame of a portal type structure,
The hydraulic cylinders are erected upward, and a horizontal shaft is rotatably supported at the upper end of each piston rod of each hydraulic cylinder via a bearing, and both ends are bent in opposite directions. Blade supporting arms having a length that allows the pieces to protrude forward and rearward of the frame are arranged in the front-rear direction at the left and right positions in the frame, and each of the shafts is provided at the center of the blade supporting arm. While fixing one end, the other end of each shaft is rotatably penetrated through a slide piece that is slidably inserted vertically into a vertical guide groove provided on both side walls of the frame, and A drive device for rotating the shaft is provided, and further, a blade holding member is attached to each end and the other end of the left and right blade supporting arms, and a blade is detachably held on each blade holding member. Blade changer coater, characterized in that it comprises a to the configuration such that.