JPS6021243Y2 - Base paper mounting device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a base paper mounting device for mounting a base paper onto a plate cylinder of a rotary stencil printing machine or the like.

In a rotary stencil printing device, the stencil paper is held in such a state that the mounting hole of the mounting ear provided at one end of the stencil paper is engaged with the stencil mounting pin provided on a part of the outer circumferential surface of the printing cylinder. The elastic member is attached to the outer peripheral surface of the plate cylinder by the adhesiveness of the printing ink, and in this case, the elastic member must be attached without wrinkles or slack.

In order to achieve the above-mentioned purpose in a base paper mounting device that automatically attaches a base paper to a plate cylinder, at least two rotatably installed base paper mounting devices are provided at positions corresponding to both axial end regions of the plate cylinder. It includes a roller and a presser member that contacts the roller, and each of the rollers is rotatable around an axis that is inclined with respect to the axis of the plate cylinder, and the roller passes between the roller and the presser member to press the shaft. A base paper mounting device characterized by applying tension in the direction along the axis of the plate cylinder to the base paper to be loaded is already disclosed in U.S. Pat. No. 54-51133 by the same applicant as the present applicant. Proposed.

However, in the above-mentioned base paper mounting device, since the base paper is given an outward tension only at both end regions of its width, sufficient tension is not given to the central region. It is easy to cause loosening in the area.

Particularly in a base paper mounting device configured such that the base paper is directed toward the plate cylinder at a certain inclination with respect to the pressing member, a certain amount of slack inevitably occurs in the width center region of the base paper. become.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a further improved base paper loading device that automatically attaches base paper to a plate cylinder.

According to the present invention, at least two rollers are rotatably provided at positions corresponding to both axial end regions of the plate cylinder on which the base paper is mounted on the outer circumferential surface, and the axis of the plate cylinder is rotated. an elastic member that corresponds to a central region in the direction and extends closer to the plate cylinder than the roller, and a presser member that contacts the roller and the elastic member, respectively, and the roller It is rotatable around an axis that is inclined with respect to the axis, and in the axial direction of the plate cylinder with respect to the base paper that passes between the roller, the elastic member, and the presser member and is attached to the plate cylinder. and a base paper mounting device configured to apply tension in a direction along the rotational direction of the plate cylinder.

According to this configuration, the mounting holes provided in the mounting ears of the base paper are engaged with the base paper mounting pins of the plate cylinder, and the base paper is passed between the roller, the elastic member, and the pressing member, and the base paper is pressed and pressed. When the cylinder is rotated, the base paper is applied with tension in the direction along the axis of the plate cylinder by the rollers, and at the same time moves forward while being sandwiched between the elastic member and the presser member, so that the base paper is moved toward the center. The plate is wrapped around the outer circumferential surface of the plate cylinder in a sufficiently tensioned state without any wrinkles or slack, with any slack in the area removed.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a schematic plan view showing one embodiment of a rotary stencil printing device equipped with a base paper mounting device according to the present invention, and FIG.
The figure is a schematic longitudinal sectional view thereof.

The stencil printing apparatus has a cylindrical plate cylinder 1 having a predetermined width.

This cylindrical plate cylinder 1 has a porous structure that allows printing ink to pass through, and is rotated by an electric motor (not shown) in a counterclockwise direction as viewed in FIG. 2 around its central axis. It looks like this.

Further, the cylindrical plate cylinder 1 has a base paper attachment part 2 on a part of its outer circumference, and a plurality of base paper attachment pins 3 are attached to this base paper attachment part 2.

The stencil paper 6, which has the base paper mounting pin 3 engaged with the engagement hole 5 of the mounting ear 4, is stuck to the outer peripheral surface of the cylindrical plate cylinder 1 due to the adhesiveness of the printing ink, and is integrated with the cylindrical plate cylinder 1. Rotate to .

A paper support plate 7 is provided at the front of the cylindrical plate cylinder 1 when viewed in the paper feed direction, and extends in a direction tangential to the top of the plate cylinder 1 .

Rollers 8 and 9 are provided on the base paper support plate 7 at positions close to the outer peripheral surface of the plate cylinder 1 and corresponding to both axial end regions of the plate cylinder 1.
is located.

The rollers 8, 9 are each rotatably carried on a shaft 10.11 extending along an axis inclined with respect to the axis of the plate cylinder 1, and these shafts 10, 11 are supported by attachments not shown in the figure. It is urged upward by a biasing member.

For this purpose, the roller 8.9 protrudes a predetermined amount from the upper surface of the base paper support plate 7 at a window 12.13 provided in the base paper support plate 7.

The shaft 10.11 is inclined in such a direction that the end of the shaft closer to the central region of the plate cylinder approaches the outer peripheral surface of the plate cylinder than the end of the shaft closer to the axial end region of the plate cylinder.

The tip of the base paper support plate 7 on the plate cylinder side is bent slightly downward, and an elastic member 14 made of silicone sponge is attached to the central region of this bent tip.

The elastic member 14 is a bar-shaped member as shown in the embodiment of the figure, and its cross section is rounded so as not to damage the base paper, and its surface is sufficiently smooth. It is molded.

At the upper part of the cylindrical plate cylinder 1 and the base paper support plate 7, there is provided a presser plate 16 which is openable and closable and whose one end is pivotally connected to an outer frame (not shown) by a hinge element 15.

When the presser plate 16 is in the closed state, the rollers 8 and 9 and the elastic member 14 are placed in contact with the back surface of the presser plate 16 with a constant pressure.

Further, the back surface of this presser plate 16 is formed to have a low coefficient of friction and a highly slippery surface.

When installing the stencil paper 6, first lift the presser plate 16 and pull it away from the paper support plate 7 to open it.
In this state, the engagement holes 5 provided in the mounting ears 4 of the stencil paper 6 are engaged with the paper mounting pins 3 of the plate cylinder 1, thereby locking one end of the stencil paper 6 to the plate cylinder 1. do.

In this state, the stencil paper 6 is placed on the paper support plate 7, and then the presser plate 16 is closed.

Then, the stencil paper 6 comes to be pressed against the outer peripheral surfaces of the rollers 8 and 9 and the upper surface of the elastic member 14 by the weight of the presser plate 16.

In this state, the plate cylinder 1 is rotated counterclockwise as seen in FIG. 2 at a relatively low speed.

Then, as the printing cylinder 1 rotates, the stencil paper 6 is sandwiched between the lower rollers 8 and 9 and the elastic member 14 and the upper pressing plate 16, and is rubbed and moved to the left in the figure. A tension force is applied along the direction of movement.

At this time, the center portion of the width of the base paper 6 is rubbed by the elastic member 14 to remove slack.

Further, the action of the rollers 8 and 9 applies tension along the axial direction of the plate cylinder 1.

In this way, the stencil paper 6 is attached to the outer peripheral surface of the printing cylinder 1 without wrinkles or slack.

Incidentally, in the above embodiment, the presser member is a single presser plate 16.
However, the presser member that contacts the rollers 8 and 9 and the presser member that contacts the elastic member 14 may be configured separately.

Further, these pressing members may be rotatable pressing rollers.

In the above, the present invention has been described in detail with respect to specific embodiments, but the present invention is not limited thereto, and those skilled in the art will appreciate that various embodiments are possible within the scope of the present invention. It will be clear from

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view showing the main parts of one embodiment of a rotary stencil printing device equipped with a base paper mounting device according to the present invention;
The figure is also a schematic cross-sectional view thereof, and FIG. 3 is a cross-sectional view showing the structure of the elastic member 14 along line 1--2 in FIG. 1...Plate cylinder, 2...Base paper attachment part, 3.
...Base paper mounting pin, 4...Mounting ear, 5
...Engagement hole, 6...Denmark paper, 7...
...Base paper support plate, 8, 9...Roller, 1
0,11...axis, 12,13...fenestration, 14...
...Elastic member, 15...Hinge member, 1
6. Song/presser board.

Claims (1)

[Scope of utility model registration request] At least two rollers are rotatably provided at positions corresponding to both axial end regions of the plate cylinder on which the base paper is mounted on the outer circumferential surface of the plate cylinder, and the rollers are rotatably provided at positions corresponding to both axial end areas of the plate cylinder, and the rollers are arranged in a direction corresponding to the central area of the plate cylinder in the axial direction. an elastic member extending close to the cylinder, and a presser member contacting the roller and the elastic member, respectively, the rollers being rotatable about respective axes inclined with respect to the axis of the plate cylinder; Applying tension in the axial direction of the plate cylinder and along the rotational direction of the plate cylinder to the base paper that passes between the roller, the elastic member, and the presser member and is mounted on the plate cylinder. Characteristic base paper mounting device.