JPH049183Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a plate-making paper locking device that locks and holds the plate-making paper wrapped around the cylinder of a mimeographing machine.

(Prior Art) A mimeograph machine is known in which an appropriate amount of ink is extruded onto printing paper through holes in a plate base paper to perform ink transfer.

As a mechanism for locking the plate-making base paper of this mimeograph printing machine, a locking protrusion with a locking part provided at the tip is provided on the outer periphery of the cylinder. It is common that the plate-making base paper is held in place by being inserted into a hole provided in the edge paper and the locking part at the tip of the locking protrusion being locked in the hole in the edge paper.

(Problem to be solved by the invention) However, when the plate-making base paper is locked and held by such a mechanism, the locking part at the tip of the locking protrusion touches the hole provided in the edge paper when it is attached or removed. It gets in the way by getting caught on the edges of the plate, making it troublesome to attach and remove the plate-making base paper, and especially when removing the plate-making base paper, it also causes clothes etc. to be stained with ink.

SUMMARY OF THE INVENTION Therefore, the object of the present invention is to provide a plate-making paper locking device that allows easy attachment and detachment of the plate-making paper and prevents hands, clothes, etc. from getting dirty as much as possible.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the plate-making base paper locking device according to the present invention is used in a mimeograph printing machine that wraps the plate-making base paper 4 around the outer periphery of the cylinder 1 and performs printing. A locking protrusion 2 that is inserted into the hole 5 provided in the edge paper 3 of the plate-making base paper 4 on the outer periphery of the cylinder 1 and that locks and holds the plate-making base paper 4 is provided perpendicularly to the outer periphery of the cylinder 1, or its upper end 2a is the lower end. 2b in the direction of rotation of the cylinder 1 (in the direction of arrow B), and at a position separated by a predetermined distance from the locking projection 2 in the direction of rotation of the cylinder 1, the locking projection 2 is provided.
A regulating protrusion 8 is provided for regulating the detachment of the lug paper 3 held in place from the cylinder surface.

(Embodiments) Preferred embodiments of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a partially sectional view of a cylinder portion of a mimeographing machine according to the present invention, and FIG. 2 is a partially enlarged view as seen from the direction A in FIG.

Reference numeral 1 denotes a cylinder of a mimeograph machine that stores ink inside and is driven to rotate in the direction of arrow B by a drive device (not shown).The outer periphery of this cylinder 1, the part where the base paper for plate making is wound, is covered with printing paper. A screen (not shown) is wrapped around it for good transfer of ink to the paper.

Reference numeral 2 indicates that the outer periphery of the cylinder 1 has a predetermined width in the axial direction of the cylinder 1, and a lower end 6a is provided at the center thereof.
is a locking protrusion provided with a notch 6 that is substantially flush with the outer circumferential surface of the cylinder 1, and the upper end 2a of the locking protrusion 2 is aligned in the rotational direction of the cylinder 1 (arrow B) with respect to its lower end. A plurality of cylinders are provided in the axial direction of the cylinder 1 so as to be slightly displaced in the rotational direction.

Reference numeral 3 denotes a selvage paper attached to the tip of the plate-making base paper 4, and this selvage paper 3 has a long hole 5 approximately equal to the width of the latching projection 2 so as to pass through the latching projection 2. The same number of locking protrusions 2 are provided in the axial direction of the cylinder 1 at the same intervals, and the locking protrusions 2 are inserted through each of the locking protrusions 2 to lock and hold the base paper 4 for plate making.

On the other hand, reference numeral 7 indicates that the cylinder 1 is closer to the locking protrusion 2.
These are regulating protrusions erected to face the protrusions 2b, 2b of each of the locking protrusions 2 at positions separated by a required distance in the rotational direction (direction of arrow B), and each of the regulating protrusions 7 A contact portion 7a perpendicular to the cylinder surface that restricts the movement of the tip end 3a of the selvage paper 3 to the left in FIG. The locking portion 7b is formed by bending the tip of the regulating protrusion 7 in the direction of the locking protrusion 2.

Reference numeral 8 indicates that the notch 6 of the locking protrusion can freely move forward and backward in the direction of rotation of the cylinder (arrows C and D).
This is a stripping claw that is provided in the direction (1) and removes the plate-making base paper 4 from the outer periphery of the cylinder 1, and the tip 8a of this stripping claw 4 is formed in a wedge shape. Incidentally, reference numeral 9 denotes a drive device (means) for moving this forward and backward, and is provided with a solenoid, a motor, or the like.

The operation of such a mechanism will be explained below. Since the locking protrusion 2 does not have a locking part at its tip, it can be easily inserted into the elongated hole 5 of the selvage paper 3. At this time, the tip 3a of the selvage paper is controlled by the regulating projection 7 in the drum rotation direction and the drum rotation direction. Movement in the radial outward direction is restricted, and therefore the elongated hole 5 of the edge paper 3 does not easily come off from the locking protrusion 2, making it easy to attach the plate-making base paper 4 to the cylinder 1. Furthermore, when the mimeograph machine is in operation, the printing paper 4 and the edge paper 3 are rotated in the opposite direction to the rotation direction of the cylinder 1 due to the rotating rollers that transfer ink through the unillustrated printing paper and the printing paper 4 of the printing paper. However, since the locking protrusion 2 in this embodiment has its tip 2a inclined in the direction of rotation of the cylinder 1, this load facilitates the locking action by the locking protrusion 2. work in the direction of Therefore, even if the elongated hole 5 is not fully inserted into the locking protrusion 2 (not fully locked) when the mimeograph machine is started, it will be fully locked as the machine starts operating, so that the plate making process will be easier. There is no need to worry about the base paper 4 peeling off from the cylinder 1. At the end of printing, the stripping claw 7 moves forward in the direction of arrow D, and the cylinder 1
As the tip 8a rotates (in the direction of arrow B)
is inserted between the edge paper 3 and the outer peripheral surface of the cylinder 1 through the gap 10 between the regulating protrusions 7 and 7 and the notch 6a, and the elongated hole 5 of the edge paper 3 is removed from the locking protrusion 2, and the plate-making base paper 4 Peel it off from cylinder 1. In addition, a small depression 1a is formed in the cylinder radial direction in front of the locking projection 2 on the outer periphery of the cylinder in order to increase the distance between the tip of the edge paper 3 and the cylinder surface. Claw 8 is in this depression 1a
It is inserted between the cylinder surface and the edge paper 3 along the rear slope 1b.

In this way, according to the present embodiment, the plate-making base paper 4 can be installed extremely easily and reliably, and can also be removed automatically.

Note that the present invention is not limited to the examples,
For example, the regulating protrusion 7 may be curved in the direction of the locking protrusion 2 . Furthermore, the locking protrusion 2 may be simply provided vertically with respect to the cylinder surface, or two locking protrusions may be provided in place of the notch. At this time, the shape of each locking protrusion may also be a simple bar shape instead of a flat plate shape.

Further, in the embodiment, the number of elongated holes 5 was set to be the same as the number of locking protrusions 2 and 6, but it may be larger than this, and the stripping claws 8 are provided with the lug paper between each of the locking protrusions 2. It may be inserted between cylinders 1.

(Effects of the invention) As is clear from the above explanation, according to the present invention, it is possible to attach the plate-making base paper extremely easily and reliably, and its removal can be easily automated and the plate-making base paper can be replaced easily. Therefore, it is possible to provide a locking device for plate-making paper that does not stain hands, clothes, etc. as much as possible.

[Brief explanation of drawings]

FIG. 1 is a partially sectional view of a cylinder portion of a mimeographing machine according to the present invention, and FIG. 2 is a partially enlarged view as seen from the direction A in FIG. And the drawings, 1 is a cylinder, 2 is a locking protrusion, 3
is a selvage paper, 4 is a plate-making base paper, 5 is a long hole, 6 is a notch,
7 is a regulating protrusion, and 8 is a stripping claw.

Claims (1)

[Scope of utility model registration request] In a mimeograph printing machine that wraps a plate-making base paper around the outer periphery of a cylinder and performs printing, a locking protrusion is inserted into the hole provided in the edge paper of the plate-making base paper on the outer periphery of the cylinder and locks and holds the plate-making base paper. The lug paper is provided perpendicularly to the cylinder surface or so that its upper end is displaced in the direction of cylinder rotation than the lower end, and at a position a predetermined distance away from this locking protrusion in the direction of rotation of the cylinder. A locking device for plate base paper in a mimeograph printing machine, characterized in that it is provided with a regulating protrusion for regulating separation.