JPH0318184Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to a pair of roll devices in which the front and rear contact surfaces of the material to be fed are used as release mechanisms.

In this case, in printing machines, roll coaters, etc., rolls that come into direct contact with non-continuous objects to be printed or coated (hereinafter referred to as "materials"), such as offset rolls, coat rolls, pressure rolls, etc. Applicable to these rolls when there is a risk of breakage at the front or rear ends of the rolls.

(Prior art) When printing or coating the surface of materials such as plates, rods, and shapes, conventionally, as shown in FIG. The clearance l through which
In order to apply printing pressure to the material 3, it is narrower by Δl than the wall thickness L of the material 3 (l<L=l+Δl).

Therefore, as shown in FIG. 6, the material 3 is fed between the coating roll 1 and the pressure roll 2.
When printing or coating the surface, there is a problem in that the front end of the material 3 hits the coating roll 1 and damages the coating roll 1.

(Problems to be Solved by the Invention) In addition to the problems of the prior art described above, the coating roll 1 and pressure roll 2 are significantly damaged due to warping, deformation, and burrs during cutting of the material 3.
It was impossible to put it into practical use.

(Means for Solving the Problems) In this invention, in order to prevent the coating roll 1 and pressure roll 2 from being damaged by the material 3, the rolls 1 and 2 of a printing machine or roll coater are coated with the material 3.
It is equipped with a mechanism that automatically attaches and detaches the material 3 and prevents the front and rear end portions of the material 3 from coming into contact with the coating roll 1 and the pressure roll 2.

(Function) According to the means in this invention, as shown in FIG. 2, before the material 3 is printed or coated, the clearance (L+α) between the pair of coating rolls 1 and pressure rolls 2 is Immediately after the material 3 passes through the barrier 4 and the deformed portion 5 which are slightly wider than the wall thickness L and which are formed at the front end of the material 3, the coating roll 1 is rolled as shown in FIG.
The pressure roll 2 presses the material 3, and the clearance becomes (L-Δl) to perform printing, coating, and painting.

Furthermore, as shown in FIG. 4, just before the dangerous burr 4 or deformed portion 5 at the rear end of the material 3 passes between the coating roll 1 and the pressure roll 2, the clearance returns to (L+α).

(Example) FIG. 1 is an explanatory diagram showing a specific example of this invention.

That is, this invention has respective fulcrums 6 and 19 at one end, and the other end is connected to the respective free ends 8 and 20 of the coating roll part desorption cylinder 7 and the pressure roll part desorption cylinder 10, and, A pair of bearing frames 9 and 18 whose other ends are fixed to respective bases 14 and 15 are arranged opposite to each other with a gap between them, and one bearing frame 9 has a coating roll 1 in contact with a doctor roll 17, respectively. A pressure roll 2 is loosely fitted into the other bearing frame 18 so as to face the coating roll 1, and an inlet conveyor 12 and an outlet conveyor 16 are provided before and after the bearing frames 9 and 18, A detector 11 located above the entrance side conveyor 12 is connected to a pulse generator 13, a cylinder 7 for removing and removing the coating roll part, and a cylinder 1 for removing and removing the pressure roll part.
Another object of the present invention is to provide a pair of roll devices in which the front and rear end surfaces of the material to be fed, which are connected by electrical wiring, respectively, serve as escape mechanisms.

The operation of the above embodiment will be explained using a roll coater.

In this case, to keep the coating thickness constant,
Doctor roll 1 in contact with coating roll 1
7 is loosely fitted between the bearing frames 9. That is, the material 3 sent by the entrance side conveyor 12 is transferred to the detector 1.
1 is detected, since the pulse generator 13 always generates pulses, it starts counting the first pulse. At this time, the coating roll part desorption cylinder 7 and the pressure roll part desorption cylinder 10 are electrically connected (ON) according to the preset number written in advance, and the coating roll part 1 is electrically connected (ON).
The material 3 is sandwiched between the pressure rolls 2 immediately after its tip and coated at a constant pressure. That is,
Immediately before the material 3 enters between the coating roll 1 and the pressure roll 2, L+α>L as described above, and immediately after the material 3 enters the relationship, l=L−Δl. Therefore,
The front end of the material 3 never hits the coating roll 1 or the pressure roll 2. When the detector 11 finishes detecting the material 3 after being coated, it starts counting the second pulse. Then,
According to the second preset number written in the outline, the coating roll part desorption cylinder 7 and the pressure roll part desorption cylinder 10 are electrically disconnected (OFF), and the coating roll 1 and the pressure roll 2 are removed from the material 3. break away. The relationship at this time is L
+α>L. When the detector 11, the cylinder 7 for removing and removing the coating roll part, and the cylinder 10 for removing and removing the pressure roll part are electrically connected (ON), the respective cylinders 7 and 10 extend and touch the ends of the bearing frames 9 and 18. Press the bearing frame 9, 1
8 move close to each other with the fulcrums 6 and 19 as the center of swing. Therefore, the coating roll 1 and the roll 2 which are loosely fitted in the bearing frames 9 and 18 also come a little close to each other and sandwich the material 3 (l=L-Δl). Material 3
Immediately before feeding and at the end of coating,
Since the cylinders 7 and 10 are electrically disconnected (OFF), the respective cylinders 7 and 10 are contracted, and as shown in FIG.
The rolls are swung to a horizontal state, widening the space between the coating roll 1 and the pressure roll 2, and separating from the material 3 (L+α>L). In other words, material 3
By moving the pulse generator 13 and the detector 11
automatically expands and contracts the cylinders 7 and 10 to adjust the clearance between the corresponding coating roll 1 and pressure roll 2. The coated material 3 is then conveyed out by the exit conveyor 16.

In short, according to this embodiment, when the start switch is turned on after the material 3 is placed on the entrance side conveyor 12 in alignment with the front pad, the front pad stopper is lowered by the cylinders 7 and 10. Then, the material 3 is transferred toward the bearing frames 9 and 18 by the entrance conveyor 12, and the detector 11 detects passage of the front end and starts front end face pulse counting. When the count reaches the preset number,
The cylinders 7 and 10 are operated and the bearing frames 9 and 18 are moved to the roll clearance position. At this point, the material 3 has been transferred from the roll position to a position past the relief section of the front end. Then, the material 3 is sandwiched between the coating roll 1 and the pressure roll 2 and brought into contact with each other to perform processing such as printing. Furthermore, when the detector 11 detects the rear end of the material 3, it starts counting pulses for the rear end. Moreover, when the rear end preset number is reached, the bearing frame 9,
18 escapes to the escape position. In other words, it is preset in advance so that the relief portion at the rear end escapes before it reaches the roll position. Immediately after the rear end passes the stopper position, the front stopper rises. According to this embodiment, the detector 11 located above the entrance conveyor 12 is connected to the pulse generator 13, the coating roll part desorption cylinder 7, and the pressure roll part desorption cylinder 10 by electrical wiring, respectively. When the detector 11 detects the front and rear ends of the material 3, pulse counting is started, and the bearing frames 9 and 18 are moved by cylinder operation. In other words, each of the above configurations is linked.

(Effects of the invention) According to this invention, the front end of the material does not hit the roll, and therefore, damage to the roll can be prevented as much as possible. Furthermore, since it can be applied even to materials with burrs or deformations, the applicable standard range for these can be greatly relaxed, and it can be applied even if the material is roughly cut. In addition, even if the front and rear ends of the material are deformed due to transportation or movement, printing or coating can be applied to the outer surface of the material that is being fed one after another, improving productivity and economy. Significant improvement. Note that this idea can also be applied to printing machines, coaters, etc.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing an embodiment of the present invention, Figs. 2, 3, and 4 are economic explanatory diagrams of the main parts;
FIGS. 5 and 6 are explanatory diagrams of the conventional product over time. In addition, code 1 in the figure... coating roll,
2...pressure roll, 3...material, 4...burr, 5...
...Deformation part, 6 and 19...Fully point, 7...Cylinder for removing and removing coating roll part, 10...Cylinder for removing and removing pressure roll part, 8 and 20...Free end,
9 and 18... Bearing frame, 11... Detector, 12...
...Entrance side conveyor, 13...Pulse generator, 1
4 and 15...base, 16...exit side conveyor, 17...doctor roll.

Claims (1)

[Scope of utility model registration request] One end has respective fulcrums 6 and 19, the other end is connected to the respective free ends 8 and 20 of the coating roll part desorption cylinder 7 and the pressure roll part desorption cylinder 10, and the other end is connected to the respective bases. A pair of bearing frames 9 and 18 fixed to bearing frames 14 and 15 are arranged opposite to each other with a gap between them, and a coating roll 1 with a doctor roll 17 in contact with one of the bearing frames 9 is loosely fitted into the other bearing frame 9. A pressure roll 2 is loosely fitted into the bearing frame 8 so as to face the coating roll 1, and an inlet conveyor 12 and an outlet conveyor 16 are provided before and after the bearing frames 9 and 18, and above the inlet conveyor 12. The detector 11 located at roll equipment.