JPH06234264A - Screen printing machine - Google Patents

Abstract

PURPOSE:To simply and inexpensively release stencil paper by imparting a habit curving in the direction spaced apart from the outer peripheral surface of a cylindrical plate cylinder to the stencil paper and allowing the stencil paper to be spaced apart from the outer peripheral surface of the cylindrical plate cylinder when a clamp means is shaken to an open position. CONSTITUTION:A cylindrical plate cylinder 1 is rotated in such a state that stencil paper 8 is mounted on the outer peripheral surface of the plate cylinder 1. A clamp means 2 is provided so as to extend along the axial direction in the outer peripheral surface of the cylindrical plate cylinder 1 and shaken between the closing position grasping the leading end part of the stencil paper 8 and the open position releasing the stencil paper 8. Further, a pair of plate discharge rollers 5, 7 are arranged in the vicinity of the outer peripheral surface of the cylindrical plate cylinder 1 to discharge the stencil paper 8. At this time, a habit curing in the direction spaced apart from the outer peripheral surface of the cylindrical plate cylinder 1 is imparted to the stencil paper 8. When the clamp means 2 is shaken to an open position, the stencil paper 8 is allowed to be spaced apart from the outer peripheral surface of the cylindrical plate cylinder 1 and the leading end part of the stencil paper 8 is introduced into the gap between a pair of the plate discharge rollers 5, 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stencil printing machine.

[0002]

2. Description of the Related Art A conventional stencil printing machine, which is not shown in the drawings, has a stencil sheet mounted on the outer peripheral surface thereof and a porous cylindrical plate cylinder which is rotated around its own central axis by a rotation driving means. Clamping means extending along the axial direction of the outer peripheral surface of the plate cylinder and swinging between a closed position for clamping the leading end of the stencil sheet and an open position for releasing the sandwiching, and the stencil sheet for discharging the stencil sheet. It has a pair of stencil sheet ejection rollers, clamps the tip of the stencil sheet on the clamping means, and mounts it on the cylindrical plate cylinder.The cylindrical plate cylinder is rotated to perform printing, and the stencil sheet after printing is ejected. In order to separate the stencil sheet from the cylindrical plate cylinder,
Of the pair of plate ejection rollers, the lower roller is swung around the shaft of the upper roller to press it against the cylindrical plate cylinder, and the lower roller is rotated to separate the stencil sheet from the cylindrical plate cylinder, and the plate is ejected. Return the roller pair to the original position and guide the stencil sheet between the stencil roller pair to eject the stencil sheet, or between the cylindrical stencil sheet and the stencil sheet for separating the stencil sheet from the cylindrical stencil sheet. The one in which the separation claw is oscillated and inserted to guide the stencil sheet between the plate discharge roller pair is used.

[0003]

In the conventional stencil printing machine as described above, in order to separate the used stencil sheet from the cylindrical plate cylinder, the roller is swung in the direction of the cylindrical plate cylinder to form a cylinder. In the case of press-contacting the plate cylinder, a solenoid, an arm for holding it, a spring, etc. are required. When the roller is swung, it must be parallel to the drum, so the arm is attached to both left and right sides. It is necessary, and in the case of using a separating claw, a solenoid for swinging the separating claw, an arm and a spring for holding the solenoid,
It requires a device to operate it, and if the separating claw contacts the cylindrical plate cylinder when it is rocked, it will damage the surface of the cylindrical plate cylinder, so delicate position adjustment to rock at the optimum position. There is a problem of requiring a device capable of performing.

Therefore, an object of the present invention is that the used stencil sheet is peeled from the cylindrical plate cylinder, no new oscillating component is required, the surface of the cylindrical plate cylinder is not damaged, and it is simple and inexpensive. An object of the present invention is to provide a stencil printing machine that can be performed by a device and can be downsized and priced.

[0005]

In order to achieve the above-mentioned object, the present invention provides a stencil sheet mounted on the outer peripheral surface of a stencil sheet, which is rotationally driven about its own central axis. A porous cylindrical plate cylinder rotated by, and extending along the axial direction of the outer peripheral surface of the cylindrical plate cylinder, a closed position for holding the leading end of the stencil sheet and an open position for releasing the holding. And a pair of plate discharge rollers arranged near the outer peripheral surface of the cylindrical plate cylinder for discharging the stencil sheet, and the front end portion of the stencil sheet is placed between the pair of plate discharge rollers. In a stencil printing machine that introduces and separates the stencil sheet from the outer peripheral surface of the cylindrical plate cylinder, the stencil sheet has a tendency to curve in a direction away from the outer peripheral surface of the cylindrical plate cylinder. Mounted on a surface and bends when the clamping means is rocked to the open position. Is separated a stencil sheet from the cylindrical plate cylinder utilizing, it is characterized in that its tip is introduced between the plate discharge roller pair. According to the invention of claim 2, a stencil sheet is mounted on the outer peripheral surface and is rotated by a rotation driving means around its own central axis, and a porous cylindrical plate cylinder is provided in the axial direction of the outer peripheral surface of the cylindrical plate cylinder. Clamping means extending along and swinging between a closed position for holding the leading end of the stencil sheet and an open position for releasing the holding, and a stencil arranged near the outer peripheral surface of the cylindrical plate cylinder. In a stencil printing machine having a pair of plate discharge rollers for discharging the stencil sheet, and introducing the leading end of the stencil sheet between the plate discharge roller pair to separate the stencil sheet from the outer peripheral surface of the cylindrical plate cylinder, a cylindrical plate A detection means for detecting the rotational position of the cylinder is provided, and the detection output of the detection means is input to the rotation driving means and the clamp means, and the tip portion of the stencil sheet is cylindrically shaped as the clamp means swings to the open position. Clamps within the specified rotational position away from the outer peripheral surface When there is a step, the rotation of the cylindrical plate cylinder is stopped within the range of the predetermined rotation position, the clamping means is swung to the open position, and the stencil sheet is separated from the cylindrical plate cylinder, and its tip is It is characterized in that it is introduced between a pair of plate discharge rollers. According to the invention of claim 3, in the invention of claim 2, the stencil sheet has a habit of curving in a direction away from the outer peripheral surface of the cylindrical plate cylinder.

[0006]

In this invention as described above, the invention of claim 1 has the habit of curving the stencil sheet in the direction away from the outer peripheral surface of the cylindrical plate cylinder in the stencil printing machine as described above. The stencil sheet is mounted on the outer peripheral surface of the cylindrical plate cylinder, and when the clamping means is swung to the open position, the stencil sheet is separated from the cylindrical plate cylinder by utilizing the behavior of curving, and the leading end of the stencil sheet is paired with the plate discharge roller pair. It is introduced during the period and is discharged. Claim 2
According to the invention, in the stencil printing machine as described above, a detection means for detecting the rotational position of the cylindrical plate cylinder is provided, and the detection output of the detection means is input to the rotation drive means and the clamper drive means, and the plate is discharged. When performing, the clamping means is positioned within the range of the predetermined position to stop the rotational drive of the cylindrical plate cylinder, the clamping means is swung to the open position, and the stencil sheet is naturally moved from the outer peripheral surface of the cylindrical plate cylinder. It peels off, and its tip is introduced between the pair of plate ejection rollers to eject the plate. The invention of claim 3 is
In the invention of claim 2, the stencil sheet has a tendency to curve in a direction away from the outer peripheral surface of the cylindrical plate cylinder, and when the clamping means is swung to the open position, the stencil sheet is curved to the outside. Away from the cylindrical plate cylinder.

[0007]

1 to 5 show a first embodiment of the present invention. In the first embodiment, the clamping means 2 swings between a closed position for holding the leading end of the stencil sheet and an open position for releasing the holding, and a clamp opening / closing drive (not shown) for operating the clamper 3. The clamper 3 is provided so as to extend along the axial direction of the outer peripheral surface of the cylindrical plate cylinder, and the upper plate discharge roller 5 includes eight blade members 6 made of an elastic body and a roller-shaped elastic body. The stencil sheet 8 having the curl habit is driven by the upper stencil roller 5 which is rotationally driven in the same direction as the cylindrical stencil cylinder 1 and which is formed by projecting in the form of an impeller with a radial equal radial angle from the stencil plate main body 15. When the sheet is released from the clamper 3, the front end of the stencil sheet 8 is separated from the cylindrical plate cylinder 1, and the blade member 6 of the upper plate discharging roller 5 is released.
It is installed at a position where it is called into and abuts. The upper plate discharge roller 5 may have a cylindrical roller body made of a very soft rubber instead of the impeller shape. Also, the upper plate discharge roller 5
Of the upper plate discharge roller 5 is positioned almost immediately below the upper plate discharge roller 5 and bent to provide a lower plate discharge roller 7 at a position where the stencil sheet 8 is eaten. The rotation direction of the lower plate discharge roller 7 is opposite to that of the upper plate discharge roller 5. To do.

As shown in FIG. 2, the stencil sheet 8 is wound and mounted in a roll shape, and at the same time when the stencil sheet is made by the thermal head 9, it is conveyed by the platen roller 10.
Guided by the guide plate 11, it passes through the tension roller 12,
Therefore, a curl is added to the cylindrical plate cylinder 1 in a direction away from the outer peripheral surface of the cylindrical plate cylinder 1, it is clamped by a clamper 3 and wrapped around the cylindrical plate cylinder 1, and cut into a predetermined length by a cutter (not shown). The cylindrical plate cylinder 1 is mounted on the cylindrical plate cylinder 1 by being rotated by a main motor (not shown). Since the stencil sheet 8 is fed through such a path, the stencil sheet 8 is curled on the cylindrical plate cylinder 1 in a direction opposite to the direction in which the stencil sheet is wound around the cylindrical plate cylinder 1 (in the direction of peeling from the cylindrical plate cylinder 1). Curl).

In the state before the plate discharge operation shown in FIG. 3, when a plate discharge key (not shown) on the operation panel (not shown) is pressed, the clamper 3 of the cylindrical plate cylinder 1 is located just beside the axis center of the cylindrical plate cylinder 1 (horizontal). The rotation is stopped at the stop position for starting plate ejection, which is approximately 25 ° above the position). Further, after the jam processing or the like, when the rotational position of the cylindrical plate cylinder 1 is not at the stop position for starting the plate ejection, the cylindrical plate cylinder 1 is rotated to the predetermined position and stopped.

After the rotation of the cylindrical plate cylinder 1 is stopped, as shown in FIG. 4, a clamper opening / closing drive means (not shown) rotates the clamper 3 about the clamper shaft 4 to make the stencil sheet 8.
And the stencil sheet 8 has a characteristic of curving in a direction of separating from the outer peripheral surface of the cylindrical plate cylinder 1, and therefore, due to its curled property, it is easily peeled off from the cylindrical plate cylinder 1 and the upper plate is discharged. The plate 5 voluntarily falls in the direction of the roller 5 and comes into contact with the blades of the upper plate discharge roller 5, and the upper plate discharge roller 5 and the plate lower discharge roller 7 rotate in the direction of the arrow shown in FIG. The blade member 6 of the upper roller 4 easily feeds between the upper plate discharge roller 5 and the lower plate discharge roller 7, and is separated from the cylindrical plate cylinder 1 and discharged to a plate discharge box (not shown) located on the downstream side. To be done. At that time, the clamper 3 is closed by the clamper opening / closing drive means as shown in FIG.

In the second embodiment, although not shown, detection means for detecting the rotational position of the cylindrical plate cylinder is provided, and the output of the detection means is input to the rotation drive means of the cylindrical plate cylinder and the clamper opening / closing drive means. However, the stop position of the cylindrical plate cylinder is controlled. The detection means includes an actuator (not shown) fixed to the cylindrical plate cylinder and a rotational position detection sensor (not shown) attached to the main body of the stencil printing machine, and the stencil sheet is separated from the outer peripheral surface of the cylindrical plate cylinder. At that time, the stencil sheet collapsed from the cylindrical plate cylinder by its own weight and peeled off, and the leading edge of the stencil paper was caught by the pair of plate discharge rollers.The position range of the cylindrical plate cylinder was set in advance, and the plate discharge key was pressed. When
The actuator provided on the cylindrical plate cylinder crosses the rotational position detection sensor, the output of the rotational position detection sensor is input to the rotation driving means, and the electric motor is actuated by the main motor of the cylindrical plate cylinder to set it. The rotation of the cylindrical plate cylinder is stopped within the range of the position, and the clamper is opened. If a stencil sheet having a habit of curving in a direction away from the outer peripheral surface of the cylindrical plate cylinder is used,
It can be easily peeled off from the cylindrical plate cylinder and can be more effectively embedded in the plate discharge roller pair.

[0012]

The present invention is as described above, and the invention of claim 1 is a porous cylinder in which a stencil sheet is mounted on the outer peripheral surface and is rotated by a rotation driving means around its own central axis. Clamping means extending between the block cylinder and the axial direction of the outer peripheral surface of the cylindrical plate cylinder and swinging between a closed position for clamping the leading end of the stencil sheet and an open position for releasing the clamp. And a pair of plate discharge rollers arranged near the outer peripheral surface of the cylindrical plate cylinder for discharging the stencil sheet, and introducing the leading end of the stencil sheet between the pair of plate discharging rollers to form the stencil sheet in a cylindrical shape. In a stencil printing machine that separates from the outer peripheral surface of the plate cylinder, the stencil sheet has a habit of curving in a direction away from the outer peripheral surface of the cylindrical plate cylinder and is attached to the outer peripheral surface of the cylindrical plate cylinder, and the clamping means is The stencil sheet is made into a cylinder by using the habit of bending when it is swung to the open position. Since it is separated from the plate cylinder and its tip is introduced between the plate discharge roller pair, a solenoid or spring that swings the plate discharge roller and separation claw to discharge the used stencil sheet from the cylindrical plate cylinder. It does not require a complicated mechanism, does not require fine adjustment of their positional relationship, does not damage the surface of the cylindrical plate cylinder, and has the effect of reducing the size and cost of the stencil printing machine. is there. According to the invention of claim 2, a stencil sheet is mounted on the outer peripheral surface and is rotated by a rotation driving means around its own central axis, and a porous cylindrical plate cylinder is provided in the axial direction of the outer peripheral surface of the cylindrical plate cylinder. Clamping means extending along and swinging between a closed position for holding the leading end of the stencil sheet and an open position for releasing the holding, and a stencil arranged near the outer peripheral surface of the cylindrical plate cylinder. In a stencil printing machine having a pair of plate discharge rollers for discharging the stencil sheet, and introducing the leading end of the stencil sheet between the plate discharge roller pair to separate the stencil sheet from the outer peripheral surface of the cylindrical plate cylinder, a cylindrical plate A detection means for detecting the rotational position of the cylinder is provided, and the detection output of the detection means is input to the rotation driving means and the clamp means, and the tip portion of the stencil sheet is cylindrically shaped as the clamp means swings to the open position. Clamps within the specified rotational position away from the outer peripheral surface When there is a step, the rotation of the cylindrical plate cylinder is stopped within the range of the predetermined rotation position, the clamping means is swung to the open position, and the stencil sheet is separated from the cylindrical plate cylinder, and its tip is Since it is introduced between the pair of plate discharge rollers, a complicated mechanism such as a solenoid or a spring for swinging the plate discharge roller or separation claw is not required to discharge the used stencil sheet from the cylindrical plate cylinder. There is no need to make fine adjustments to the
It is possible to reduce the size and cost of the stencil printing machine without damaging the surface of the cylindrical plate cylinder. According to the invention of claim 3, in the invention of claim 2, since the stencil sheet has a characteristic of curving in a direction away from the outer peripheral surface of the cylindrical plate cylinder, the stencil sheet is easily separated from the cylindrical plate cylinder. There is an effect of doing.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view showing a state in which a cylindrical plate cylinder of a first embodiment of the present invention is stopped at a predetermined position and a clamper is closed.

FIG. 2 is a schematic vertical cross-sectional view of a stencil printing machine showing the process of plate feeding in the above.

FIG. 3 is a schematic longitudinal cross-sectional view showing a state in which the cylindrical plate cylinder of the same as above stops at a predetermined position, the clamper is opened, and the leading end of the stencil sheet is separated from the cylindrical plate cylinder.

FIG. 4 shows a state in which the cylindrical plate cylinder of the same as above stops at a predetermined position, the clamper is opened, the leading edge of the stencil sheet is separated from the cylindrical plate cylinder, and the leading edge of the stencil sheet is introduced between the upper and lower plate discharge rollers. It is a schematic longitudinal cross-sectional view shown.

FIG. 5: The cylindrical plate cylinder of the same as above stops at a predetermined position, the leading edge of the stencil sheet separates from the cylindrical plate cylinder, the leading edge of the stencil sheet is introduced between the upper and lower plate discharge rollers, and the plate discharge starts, It is a schematic longitudinal cross-sectional view showing a state in which the clamper is closed.

[Explanation of symbols]

 1 Cylindrical plate cylinder 2 Clamping means 3 Clamper 4 Clamper spindle 5 Upper plate discharge roller 6 Blade member 7 Lower plate discharge roller 8 Stencil sheet

Claims (3)

[Claims] 1. A porous cylindrical plate cylinder having a stencil sheet mounted on the outer peripheral surface thereof and rotated by a rotation driving means around its own central axis, and along the axial direction of the outer peripheral surface of the cylindrical plate cylinder. Clamping means extending and swinging between a closed position for holding the leading end of the stencil sheet and an open position for releasing the holding, and arranged near the outer peripheral surface of the cylindrical plate cylinder, In a stencil printing machine having a pair of stencil discharge rollers for discharging the stencil and introducing the tip of the stencil stencil between the pair of stencil discharge rollers to separate the stencil stencil from the outer peripheral surface of the cylindrical plate cylinder, The stencil sheet has a habit of curving in a direction away from the outer peripheral surface of the plate cylinder, is attached to the outer peripheral surface of the cylindrical plate cylinder, and bends when the clamping means is swung to the open position. Is separated from the cylindrical plate cylinder, and its tip is guided between the pair of plate discharge rollers. A stencil printing machine characterized by being inserted. 2. A porous cylindrical plate cylinder having a stencil sheet mounted on its outer peripheral surface and rotated by a rotation driving means around its own central axis, and along the axial direction of the outer peripheral surface of the cylindrical plate cylinder. Clamping means extending and swinging between a closed position for holding the leading end of the stencil sheet and an open position for releasing the holding, and arranged near the outer peripheral surface of the cylindrical plate cylinder, In a stencil printing machine having a pair of plate discharging rollers for discharging a plate, and introducing the leading end portion of the stencil sheet between the plate discharging rollers to separate the stencil sheet from the outer peripheral surface of the cylindrical plate cylinder, A detection means for detecting the rotation position is provided, and the detection output of the detection means is input to the rotation drive means and the clamp means. As the clamp means swings to the open position, the leading end of the stencil sheet is the outer periphery of the cylindrical plate cylinder. The clamping means is within the range of the predetermined rotational position away from the surface. At a certain time, the rotation of the cylindrical plate cylinder is stopped within the range of the predetermined rotation position, the clamping means is swung to the open position, and the stencil sheet is separated from the cylindrical plate cylinder, and its tip portion is the plate discharge roller. A stencil printing machine characterized by being introduced between pairs. 3. The stencil printing machine according to claim 2, wherein the stencil sheet has a characteristic of curving in a direction away from the outer peripheral surface of the cylindrical plate cylinder.