JP2693164B2 - Stencil discharging machine for stencil printing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

The present invention relates to a stencil sheet ejecting device for a stencil printing machine, and more particularly, to a stencil sheet clamping device having a fixed clamp surface and a movable clamp piece on an outer peripheral surface of a rotating printing plate cylinder and holding one end of the stencil sheet between them. The present invention relates to a stencil sheet ejecting device that removes a stencil sheet held by a stencil from a stopper and ejects it from a plate cylinder.

[Prior art]

Generally, in a rotary stencil printing machine, a stencil sheet is attached to an outer peripheral surface of a rotating drum-shaped plate cylinder to form a plate surface,
Before and after the process of printing with this rotary stencil printer, the base paper is supplied to the plate cylinder, attached to the outer peripheral surface of the plate cylinder and set, and the used base paper is removed from the plate cylinder.
There is a process of discharging this. In this base paper discharging process,
An operation of removing the base end of the base paper gripped by the base paper locking means from the base paper locking means, and sandwiching the base end of the removed base paper between a pair of plate discharging rollers for discharging the base paper. Done. Conventionally, as a raw paper discharge device for automatically performing the operation of the raw paper discharge process, one shown in Japanese Utility Model Publication No. 58-164765 (prior art 1) and one shown in Japanese Patent Laid-Open No. 59-96985. (Prior Art 2) is known. In the prior art 1, a permanent magnet fixed to the plate cylinder is used as a fixed clamp surface of the base paper locking means, and between this permanent magnet and a clamp piece as a movable clamp piece attracted to the permanent magnet. The base paper is clamped. Further, a pair of upper and lower gears are used as plate discharging rollers, and a fixing plate for guiding the end of the base paper is arranged between the upper and lower gears on the upper gear side, and the lower gear has A tongue-like tapping piece made of a rubber-like elastic body is provided coaxially so as to be hit against the fixed plate with the rotation of the gear. In the process of discharging the base paper, the clamp piece was removed from the permanent magnet by the clamp piece removing device using an electromagnet, and the end of the base paper that remained stuck on the permanent magnet was scooped up by the peeling claws and raised. A configuration of a base paper discharge device is shown in which the end portion of the base paper is further flipped up by a hitting piece, and is guided between the hitting piece and the fixing plate so as to be caught while being peeled while sandwiching the base paper. In the prior art 2, when a headless base paper having no reinforcing paper piece at the locking end of the base paper is used by being clamped by a clamp-type base paper locking device, the base paper is released from the state of being clamped by the base paper locking device. In order to correct the curving of the curved shape generated at the locking end of the base paper when the paper is discharged, the air is blown from the base paper locking device to the pair of gears at the plate discharging position in order to guide the curving between the pair of stripping gears as the plate discharging roller. 1 is provided with a blower fan device that performs the following operations.

[Problems to be solved by the invention]

By the way, in the case of the above-mentioned prior art 1, it is necessary to provide a fixing plate or a hitting piece, or to provide a peeling claw, and the peeling claw comes into contact with the upper end surface of the permanent magnet only in the process of discharging the base paper. In addition, there is a need for a means for moving to the plate cylinder side at that timing. As described above, many members for performing the base paper discharging process are required, and the structure is complicated. In addition, scooping of the end of the base paper by the peeling nail may be performed relatively reliably when the end of the base paper has a reinforcing sheet, but when the reinforcing sheet is not attached, the base paper may be extremely Since it is thin, the scooping operation may be uncertain. Also, in the case of the prior art 2, a blower fan device is required, the number of members is increased, the structure is complicated, and usable base paper is limited to headless base paper. In addition, the position of the plate feeding roller with respect to the plate cylinder is set so that the base paper that has passed through the plate feeding roller follows the path that is folded back along the plate feeding roller and is wound around the outer peripheral surface of the plate cylinder. The base paper is given in advance a `` curse '' that warps without conforming to the outer peripheral surface even when attached to the outer peripheral surface, and at the time of plate discharge, the plate discharge roller is moved to the plate cylinder side, and the tail of the base paper warped by the `` curse '' is removed. It is also known that the stencil is wound around the plate discharge rollers and the base paper is sequentially discharged from its tail while rotating the plate cylinder in reverse.However, a structure for moving the plate discharge rollers and a structure for reversely rotating the plate cylinder are known. However, the complexity of the structure is inevitable, and furthermore, it is uncertain how much the "habit" given to the base paper remains due to various conditions during printing, and the tail of the base paper is rolled up by the plate discharge roller. Work is uncertain. The present invention has been made in view of the conventional technical problems as described above in order to effectively solve these problems. Therefore, it is an object of the present invention to provide a base paper ejecting device of a stencil printing machine which has an extremely simple structure and can reliably cause the base paper removed from the base paper locking means to be wound around the plate ejection roller.

[Means for Solving the Problems]

A base paper discharging device for a printing press according to the present invention has the following configuration in order to solve the problems of the conventional art and achieve the object. That is, a fixed clamp surface extending along the axial direction of the plate cylinder on the outer peripheral surface of the plate cylinder for printing, and a position facing the fixed clamp surface so as to be pressed against the fixed clamp surface. A movable clamp piece capable of swinging about a swing axis along the axial direction of the plate cylinder so as to hold the portion, and the end of the movable clamp piece on the swinging tip side precedes in the rotational direction of the plate cylinder. On the side, the rocking shafts are respectively positioned on the side of the plate cylinder in the rotational direction following direction, and the rotation direction of the plate cylinder facing the base paper locking means at the plate discharge position on the plate cylinder. Of the pair of plate discharge rollers and the pair of plate discharge rollers arranged on the leading side in the rotation direction of the plate cylinder, the plate discharge rollers being arranged radially outward of the outer peripheral surface of the plate discharge rollers. The plurality of rubber-like elastic blades extending radially are provided, and the movable When the ramp piece separates from the fixed clamp surface, the movable clamp piece is pressed against a plate discharge roller located on the side following the plate cylinder in the rotation direction, and the rubber-like elastic blade scrapes the base paper from the movable clamp piece. Is configured to take. The fixed clamp surface is fixed in comparison with the movable clamp piece being able to swing, but the mounting state to the plate cylinder does not need to be firmly fixed, and some "rattle" is allowed. You.

[Action]

According to the base paper discharge device of the printing press according to the present invention, the base paper is locked in such a manner that one end of the base paper is sandwiched between the movable clamp piece and the fixed clamp surface, and the base paper is folded back along the leading end of the movable clamp piece. In the direction of rotation of the plate cylinder beyond the upper end surface (back surface) of the movable clamp piece,
It is stuck on the outer peripheral surface of the plate cylinder. In the process of discharging the stencil from this state, the movable clamp piece of the stencil locking means reaching the stencil discharge position swings in the opening direction. At this time, the movable clamp piece is pressed against a roller (hereinafter referred to as a flat roller), which is one of the pair of plate discharge rollers, which is located on the side following the plate cylinder in the rotational direction. When the movable clamp piece is in pressure contact with the flat roller, the rubber-like elastic blade of the other plate discharging roller, that is, the plate discharging roller (hereinafter referred to as a blade roller) located on the leading side in the rotation direction of the plate cylinder is , Press the movable clamp piece together with the base paper. Further, as both plate discharge rollers rotate, this rubber-like elastic blade cooperates with the flat roller to pick up the base paper from the movable clamp piece.
The base paper picked up from the movable clamp piece is pinched between the blade and the outer peripheral surface of the flat roller until the leading edge of the base paper is caught in the contact line between the plate discharge rollers, and is reliably wound around the plate discharge roller.

【The invention's effect】

As apparent from the above description, according to the present invention, the following excellent effects are exhibited. That is, with a very simple structure, the base paper detached from the base paper locking means can be reliably wound around the plate discharging roller.

【Example】

A preferred embodiment of the present invention will be described below with reference to FIGS. 1 to 6. FIG. 1 is a perspective view showing a plate cylinder in which a stencil locking means of a stencil discharge device of a stencil printing machine according to the present invention is employed. The direction of rotation of the plate cylinder 1 in the figure is the direction of the arrow R. Plate cylinder 1
At the peripheral edges of both ends of the ridge, a ridge 2 projecting radially outward in a bank shape is formed. The main components of the clamp unit 3 as a base paper locking device are a clamp table 5 as a fixed clamp surface and a clamp plate 4 as a movable clamp piece. The opening / closing operation of the clamp unit 3 is performed by the swinging movement of the clamp plate 4 and the engagement / disengagement of the clamp table 5, and the opening / closing portion faces forward in the rotation direction of the plate cylinder 1. That is, the front end 19 of the closed clamp plate 4 is attached to the plate cylinder 1.
Is located on the leading side in the rotation direction. The clamp table 5 is formed by bending a substantially strip-shaped thin plate made of a magnetic material such as a steel plate so as to follow the outer peripheral surface of the plate cylinder 1. It is fixed on the surface so as to extend along its axial direction. Both ends of the clamp plate 4 are pivotally supported on the outer peripheral surface of the ridge 2 via the swing shaft 6. The shape of the clamp plate 4 is such that a central portion of a portion along one long side of the strip shape has a cutout portion 7 cut out slightly longer than the width dimension of the base paper. Both ends of a position along the long side including the cutout portion 7 are protruded in the longitudinal direction. The swing shaft 6 is provided with a torsion spring 8 for urging the clamp plate 4 in the opening direction. On the other hand, a rubber magnet plate 9 is attached to a surface of the clamp plate 4 facing the clamp table 5 side. Torsion spring 8
Is extremely weak and cannot prevent the force of the rubber magnet plate 9 of the clamp plate 4 attracting to the clamp base 5.
Therefore, the resilient force of the torsion spring 8 has little to do with the change from the closed state to the open state, and acts during the plate discharging operation described later. As means for driving the opening / closing operation of the clamp plate 4, a lever member 11 is fixed to one end of the swing shaft 6, and a handle-like pin portion 12 is attached to the tip of the lever member 11.
Is protruding. On the other hand, an arm member 13 that engages with and rotates the pin portion 12 of the lever member 11 is pivotally supported on a fixed portion 10 such as a frame of the printing press body. The opening and closing operation of the clamp plate 4 is operated by the arm member 13 and the lever member 11. FIGS. 2 and 3 are schematic diagrams showing the relationship between the stencil retaining means attached to the plate cylinder, the plate feeding roller and the plate discharging roller, respectively. The rotation direction of the plate cylinder 1 is the direction of the arrow R. Reference numeral 15 denotes a plate feeding roller, and reference numerals 14 'and 14 "denote plate discharging rollers. The position at which the plate feeding operation is performed is the position A in Fig. 2, and the position at which the plate discharging operation is performed is the B position. The arm members 13 for operating the opening and closing operations of the clamp plate 4 are provided at two positions, position A and position B. First, the plate feeding operation will be described. At this point, the clamp unit 3 is opened, and the base paper 16 is sent out from the plate feeding roller 15 and inserted between the clamp plate 4 and the clamp base 5. When the base paper 16 is inserted, as shown in FIG. Then, the clamp 3 is closed again, and the base paper is clamped between the clamp plate 4 and the clamp base 5. From this state, the rotation of the plate cylinder 1 further proceeds, and the base paper 16
Is folded back along the tip of the clamp plate 4 and is pasted on the outer peripheral surface of the plate cylinder 1 beyond the upper end surface of the clamp plate 4. FIG. 4 is an enlarged schematic view showing a state in which the base paper is locked by the clamp unit. Hereinafter, the state of each force acting on the base paper 16 and the clamp unit 3 will be described in detail with reference to FIG. Attraction between the rubber magnet plate 9 of the clamp plate 4 and the clamp table 5 is generated by the magnetic force with the base paper 16 held therebetween. The base paper 16 is bent at a point P ₁ at the tip corner of the rubber magnet plate 9 and further bent at a point P ₂ at the tip corner of the clamp plate 4 to rotate along the upper end surface of the clamp plate 4 (plate cylinder 1 No.) and is further bent at a point P ₃ at a corner of the cutout 7. The base paper 16 that has passed the point P ₃ is
Further, it extends rearward in the rotational direction and is attached to the outer peripheral surface of the plate cylinder 1, but is located inside the center Pc of the swing shaft 6, that is, the plate cylinder 1
Pass inward in the radial direction. Therefore, the pulling force F that pulls the base paper 16 backward in the rotation direction generates a moment in the direction of pressing the clamp plate 4 against the clamp base 5 around the center Pc of the swing shaft 6. Moreover, this moment acts evenly over the entire width of the base paper 16. Furthermore, the stronger the tensile force F is, the larger the moment is generated, and the base paper 16 is clamped by the clamp plate 4.
It is securely clamped between the clamp base 5 and the clamp base 5. In addition, the tensile force F
Is applied to the corners of the clamp plate 4 at the respective bending points by bending the base paper 16 at the points P ₁ , P ₂ , P ₃ , and is held between the clamp plate 4 and the clamp base 5. The force that pulls this out hardly acts on the part. Next, the plate discharging operation will be described. When the plate cylinder 1 rotates and the clamp 3 reaches the position B in FIG. 2, the clamp 3 is opened by a lever member (not shown) and an arm member (not shown). The plate discharge rollers 14 ′, 14 ″ correspond to the B position of the clamp part 3, and when the clamp part 3 at the B position swings the clamp plate 4, the upper end portion (back surface) of the clamp plate 4 is the plate discharge rollers 14 ′, 14 ″. The respective rollers 14 ′, 14 ″ are arranged inside and outside the swing radius of the clamp plate 4 so as to abut the lower roller 14 ′ and not the upper roller 14 ″. As shown in FIG. 6, the upper roller 14 ″ has a groove portion that forms a small diameter portion in the substantially central portion in the axial direction.
An impeller 20 having blades 18 radially extending outward of the upper roller 14 ″ formed at approximately equal intervals is mounted in the groove portion 17. This blade 18 is made of rubber. It is made of elastic material, and both rollers 14 ', 1
On the contact line of 4 ″, it bends while keeping contact with the lower roller 14 ′ and fits in the groove 17 and does not hinder its rotational movement. From FIG. 5 (1) to FIG. 5 (7) FIG. 6 is a schematic diagram showing a series of operations of the clamp plate 4, the base paper 16, the plate discharge rollers 14 ′ and 14 ″, and the plate cylinder 1 in the operation. The clamp plate 4 swings to the open side at the position B, and the base paper 16 is piled on the upper end (rear side) of the clamp plate 4 together with the base paper 16 and the lower roller 1
Pressed to 4 '. This pressing force is not so large and is due to the elastic urging force of the torsion spring 8 attached to the swing shaft 6 described above. Therefore, there is "play" in the engagement between the arm member 13 for swinging the clamp plate 4 and the lever member 11, and there is this "play" when the clamp plate 4 is in contact with the lower roller 14 '. Therefore, the elastic biasing force of the torsion spring 8 acts to move the clamp plate 4 to the lower roller 1
Press 4 '. When the clamp plate 4 is pressed by the lower roller 14 ', the plate discharge rollers 14', 14 "are rotating,
The blades 18 of the upper roller 14 "press the clamp plate 4 together with the base paper 16 against the lower roller 14 '.
The rotation of 4 ″ progresses further, and from the state where the clamp plate 4 is sandwiched between the outer peripheral surface of the lower roller 14 ′ and the blade 18, the base paper 16
Picking up only the paper, removing the clamp plate 4 and base paper
Separate 16 The clamp plate 4 is closed again by the arm member 13 and the lever member 11. Base paper 16 has feathers 18
While being sandwiched between the lower roller 14 'and the lower roller 14', the leading end is guided until it is caught in the contact line between the upper roller 14 "and the lower roller 14 '.
It is surely caught between 4 ". Finally, the plate cylinder 1 rotates and the plate discharge rollers 14 ', 14" also rotate and the base paper 16 is discharged.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a plate cylinder in which a base paper locking means of a base paper discharging device of a stencil printing machine according to the present invention is adopted, and FIGS. 2 and 3 are base paper locking means attached to the plate cylinder, respectively. And FIG. 4 is a schematic view showing the relationship between the plate feed roller and the plate discharge roller, FIG. 4 is an enlarged schematic view showing the state where the base paper is locked by the clamp portion, and FIG. 5 is the clamp plate, the base paper, and the plate discharge in the plate discharge operation. FIG. 6 is a schematic view showing a series of operations of the roller and the plate cylinder, and FIG. 6 is a perspective view showing the plate discharge roller and the rubber-like elastic blade. DESCRIPTION OF SYMBOLS 1 ... plate cylinder, 2 ... convex part, 3 ... clamp part as base paper locking means, 4 ... clamp plate as movable clamp piece, 5 ... clamp base as fixed clamp surface, 6 ...
Swing shaft, 7 ... notch, 8 ... torsion spring as biasing means, 9 ... rubber magnet plate, 10 ... fixed part, 11 ... lever member, 12 ... pin part, 13 ... Arm member, 14 '... Lower roller of plate discharge roller, 14 "... Upper roller of plate discharge roller, 15 ... Plate supply roller, 16 ... Base paper, 17 ... Groove, 18 ...
… Blade, 19 …… Clamp plate tip end, 20 …… Impeller

Claims (1)

(57) [Claims] 1. A fixed clamping surface (5) extending on an outer peripheral surface of a printing plate cylinder (1) along an axial direction of the plate cylinder (1).
And a pivot shaft (1) provided along the axial direction of the plate cylinder (1) so as to press one end of the plate stock (16) so as to be pressed against the fixed clamp surface (5). 6)
And a movable clamp piece (4) which can be swung around, and an end portion (19) of the movable clamp piece (4) on the swinging tip side is on the leading side in the rotation direction of the plate cylinder (1). A base paper locking means (3) whose swing shafts (6) are respectively positioned on the rotational direction following sides of the plate cylinder (1), and the base paper locking means (3) at the plate discharge position on the plate cylinder (1). ), A pair of plate discharge rollers (14 ′, 14 ″) arranged in the rotation direction of the plate cylinder (1), and the plate among the pair of plate discharge rollers (14 ′, 14 ″) The plate discharge roller (1
4 ") and a plurality of rubber-like elastic blades (18) extending radially outward from the outer peripheral surface of the plate discharge roller (14"), and the movable clamp piece (4 ) Is the fixed clamp surface (5)
When the movable clamp piece (4) is detached from the plate cylinder (1), the movable clamp piece (4) is positioned on the side following the rotation direction of the plate cylinder (1).
A stencil sheet discharging device for a stencil printing machine, characterized in that the rubber-like elastic blades (18) are pressed against the 4 ') so that the stencil sheet (16) is scraped off from the movable clamp piece (4).