JPH0412224B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for attaching and detaching one of a plurality of rollers, and more particularly to a roller attaching and detaching device that also serves as a shaft support for the roller.

For example, in a printing press, a dampening water application roller is in contact with a plate cylinder roller, and a dampening water application roller and an ink delivery roller are in contact with this dampening water application roller and are each rotatably supported. In this case, the dampening water application roller is in the form of an intermediate roller sandwiched between the plate cylinder roller, the dampening water transfer roller, and the ink transfer roller, so replacing such an intermediate roller is a very difficult task. In particular, when multiple rollers are pivoted and in contact with each other with a certain pressure, such as in a printing machine, disassemble the roller pivot support and its surrounding parts, and then remove the contact between the rollers. The roller had to be removed, and in a structure like a printing press with no extra space around it, this work was extremely difficult, and there was a risk of damaging the circumferential surface of the roller if it fell.

The present invention provides a roller attachment/detachment device that can easily release the contact between both sides of the rollers, which are arranged so that their circumferences are in contact with each other, while the other rollers are still pivotally supported in that position, and can be attached and detached. With the goal.

Another object of the present invention is to support the shaft of the roller and to fix (lock) the roller position when the roller is attached, and to enable the roller to be attached and removed even in a narrow space by simple operation of the operation knob. An object of the present invention is to provide a roller attachment/detachment device capable of temporarily forming a gap between one roller and another roller.

The roller attaching/detaching device according to the present invention includes a fixed eccentric bushing which is eccentrically disposed opposite to the shaft end of the roller and has an inclined groove penetrating the circumferential portion thereof;
a movable shaft supported movably in the axial direction by the fixed eccentric bushing and having a short shaft portion formed at an end thereof coaxially with the roller and insertable into the shaft end of the roller; and a movable shaft fixed to the movable shaft. and an operating shaft penetrating the inclined groove of the fixed eccentric bushing and extending to the outer side of the bushing, and by moving the operating shaft along the inclined groove, the movable shaft is moved by the eccentric amount thereof. It moves in the radial direction together with the roller, and the short shaft portion at the end of the shaft comes out of the roller.

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

FIG. 1 is a side view of a part of the roller attachment/detachment device according to the embodiment of the present invention cut along the axis, and FIG. 2 is a side view taken approximately along the - line in FIG. 1 and mainly explains the roller attachment/detachment operation. FIG. In the following embodiments, a case will be described in which the present invention is applied to a dampening roller of a cylinder roller type printing machine. Plate cylinder roller 1
A plate surface with irregularities is formed on the circumferential surface, and water and ink oil are attached to this surface, and as the roller rotates, they are transferred to the blanket cylinder roller in contact with this surface. A dampening water application roller 2, which will be described later, is in contact with the plate cylinder roller 1, and an ink delivery roller 3 and a dampening water delivery roller 4 are in contact with the dampening water application roller 2 and rotate with each other. The dampening water transfer roller 4 receives dampening water from a dampening water source roller partially immersed in a dampening water tank (not shown), and the water is applied to the plate cylinder roller 1 via the roller 2 which receives the dampening water. Also, the ink transfer roller 3
receives ink from an inking device (not shown),
Ink is applied to the plate cylinder roller 1 via the roller 2.

Referring to FIG. 1, the shaft portion 2a of the dampening roller 2 is hollow, and a short shaft portion 7 of a movable shaft 6, which will be described later, is inserted into this hollow portion via a bearing 17 and a sleeve 5. As a result, the dampening roller 2 is rotatably supported on the movable shaft 6. As shown in FIG. 3, the movable shaft 6 is
The short shaft portion 7 protrudes from the end thereof eccentrically by e with respect to the central axis a. The central axis b of the short shaft portion 7 coincides with the axis of the dampening roller 2. A through hole 8 having a small diameter at the center is bored through the circumference of the movable shaft 6 in the diametrical direction.

The movable shaft 6 is axially movably supported by a fixed eccentric bush 9 coaxial with its axis a. The eccentric bush 9 has a threaded inclined groove 10 formed in its circumferential portion, penetrating from the outer circumferential surface to the inner circumferential surface. The operating shaft 11 has a threaded hole formed at its tip, and the operating shaft 11 radially passes through the inclined groove 10 of the eccentric bushing 9 to connect to the movable shaft 6.
The bolt 12 is inserted into the through hole 8 on the circumference of the operating shaft, and the bolt 12 is screwed into the threaded hole at the tip of the operating shaft from the hole end opposite to this insertion side through the small diameter part of the through hole as shown in FIG. An operating shaft 11 is fixed to the movable shaft 6. The other end of the operating shaft 11 extends outside the eccentric bush 9 and is inserted into the operating knob 13.
As shown in FIG. 1, a compression spring 14 is installed between the outer periphery of the operating shaft 11 and the inner diameter of the operating knob 13. As shown in FIG. One end of the compression spring 14 is in contact with the tip flange portion 11a of the operating shaft 11, and the other end is in contact with the inner circumferential stepped portion 13a of the operating knob. The knob 13 is held so that it does not move. Note that in order to smoothly slide the movable shaft 6 in the axial direction with respect to the eccentric bush 9, the movable shaft 6 is provided with a grease groove 15 and a grease nipple 16 that extend inward from the shaft end and are exposed to the shaft circumferential surface. It will be done.

When the operating shaft 11 and the operating knob 13 are in position A in FIGS. 2 and 4, the short shaft portion 7 of the movable shaft 6 is inserted into the shaft end of the dampening roller 2 as shown in FIG. There is. At this time, the operating shaft 11 is connected to the inclined groove 10.
It is located at the groove end position near the roller 2 side.

As mentioned above, the dampening roller 2 is attached to the bearing 1.
7 and the short shaft portion 7 of the movable shaft 6 via the sleeve 5.
The roller 2 is rotatably supported by the roller 2 . When removing the dampening roller 2, first move the dampening roller 2 to the side in the radial direction to release it from contact with the plate cylinder roller 1, and then compress the operation knob 13. Pulling outward against the spring 14, the operating shaft 1 is pulled together with the operating knob 13.
1 is moved along the inclined groove 10 in the direction C in FIGS. 2 and 4, which is the direction away from the axial end of the roller 2. As shown in FIGS. 1 and 2, the movable shaft 6 moves away from the shaft end of the dampening roller 2 while making a spiral movement within the eccentric bushing 9 that is regulated by the inclined groove 10. move in the direction. The short shaft portion 7 at the end of the movable shaft moves in a spiral around the central axis a of the movable shaft 6 with its eccentricity e as a radius,
This causes the roller 2 to move in the direction of coming out from the shaft end, but at that time, while the short shaft portion 7 is still inserted into the shaft end of the dampening roller 2, the short shaft of the roller 2 is The bearing 1 is pivotally supported by the part 7.
7. Together with the sleeve 5, move in the direction of arrow D in FIG. 2, that is, toward the plate cylinder roller 1 side, and the roller 2 separates from the ink transfer roller 3 (operation knob B position) and moves to C position in FIGS. 2 and 4. When the operating knob 13 is moved, the short shaft portion 7 of the movable shaft 6 comes out of the sleeve 5.
That is, it comes out from the shaft end of the dampening roller 2. Of course, at this time the roller 2 is supported from below by other means. In this way, the dampening roller 2
can be freely removed at a position where it is out of contact with the ink transfer roller 3 and moved by a distance e in the direction of arrow D (position C in FIGS. 2 and 4). When installing the dampening roller 2, move the operation knob 13 and the operation shaft 11 along the inclined groove 10 toward the shaft end of the roller 2 in the opposite direction as described above, and then move the short shaft portion 7 of the movable shaft 6 toward the roller 2. It is sufficient to insert it into the shaft end of No.2. When the operating shaft 11 reaches the groove end of the inclined groove 10, the operating knob 1
When the outward tension of 3 is released, the operating knob 13 is pressed and held against the counterbore on the outer periphery of the eccentric bush 9 by the spring force of the compression spring 14, and the knob 13 and the operating shaft are locked. Further, at the end of the workday, a gap must be created between the dampening water application roller 2 and the ink transfer roller 3 to prevent deformation of the rubber covering the surface of the dampening water application roller. This gap can be created by setting the operating knob 13 to the B position shown in FIGS. 2 and 4.

As explained above, according to the present invention, even if the rollers are arranged in contact with each other, it is possible to remove and attach them with a simple knob operation, and to create a temporary gap between the rollers. It has effects such as being able to perform a pivoting function.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view of a roller attachment/detachment device according to an embodiment of the present invention, FIG. 2 is a schematic diagram for explaining the roller attachment/detachment operation approximately along the - line in FIG. 1, and FIG. FIG. 4 is a partially cutaway side view of the movable shaft according to the present invention, showing an inclined groove on the circumference of the eccentric bush. 1... Plate cylinder roller, 2... Dampening roller, 3...
Ink transfer roller, 4... Dampening water transfer roller, 6...
Movable shaft, 7...Short shaft portion, 9...Eccentric bush, 10...
Inclined groove, 11... Operating shaft, 12... Bolt, 13... Operating knob, 14... Compression spring.

Claims (1)

[Claims] 1 a fixed eccentric bush which is eccentrically disposed on the roller and opposite to the shaft end of the roller and has an inclined groove penetrating through the circumference formed therein; a movable shaft that is concentric with the roller and has a short shaft portion that can be inserted into the shaft end of the roller; and a movable shaft that is fixed to the movable shaft and extends to the outside of the bush through an inclined groove of the fixed eccentric bushing. By moving the operating shaft along the inclined groove, the movable shaft moves in the radial direction together with the roller by the amount of eccentricity thereof, and the short shaft at the end of the movable shaft moves away from the roller. A roller attachment/detachment device that features a feature that it can be pulled out.