JPH0784086B2 - Printing base paper cutting guide device for printing device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing base paper cutting guide device incorporated in a printing apparatus such as a stencil printing apparatus.

2. Description of the Related Art A printing apparatus has been proposed that has a base paper for printing as a continuous sheet in a roll shape and has a base paper cutting device for printing for cutting the base paper for printing to a predetermined length each time it is used. This is disclosed, for example, in JP-A-59-96983 and JP-A-60-161.
It is shown in each publication of No. 150.

Conventionally, in general, a base paper cutting device for printing has a fixed blade and a movable blade, and both the fixed blade and the movable blade are configured by a strip-shaped blade member extending in the width direction of the base paper, and the movable blade is printed. The printing base paper can be cut by making a single point with respect to the fixed blade around a central axis parallel to the width direction of the base paper, or by the movable blade reciprocally moving relative to the fixed blade in a guillotine manner. ing.

The cutting device as described above achieves the intended purpose, but in this type of cutting device, both the fixed blade and the movable blade have a strip shape having a width slightly larger than the width direction of the base paper for printing. It has to be configured as a thing and is expensive.

In view of the above-mentioned problems, the movable blade is formed into a chip shape or a rotor shape and is moved along the fixed blade in the width direction of the printing base paper along the fixed blade so as to cut the printing base paper in the width direction. A raw paper cutting device has been considered.

Problems to be Solved by the Invention As described above, in the case where the movable blade moves in the width direction of the printing base paper, the space serving as the moving path of the movable blade is parallel to the width direction of the printing base paper, that is, Since it extends in the direction orthogonal to the transport direction of the printing base paper, the leading end of the printing base paper enters the space for the moving passage of the movable blade when the printing base paper is transported, There is a possibility that a clogging phenomenon may occur and the transportation of the jam may not be performed smoothly. Particularly, when the base paper for printing is wound in a roll shape, the leading end of the base paper easily enters the space for the moving passage of the movable blade due to the curling of the base paper for curling, and further for printing. When the base paper is a printing base paper for heat-sensitive plate making and has a laminated structure of Japanese paper and synthetic resin, the base paper for printing is likely to be curved due to expansion and contraction of the Japanese paper due to a change in humidity, and the tip portion thereof is the movable blade. When it goes into the space for the moving passage, the conveyance failure of the printing base paper frequently occurs.

The present invention relates to a base paper cutting device of a type that cuts a base paper for printing while a movable blade moves in the width direction of the base paper for printing, and the printing is caused by the base paper penetrating into a space for a moving passage of the movable blade. An object of the present invention is to provide an improved printing base paper cutting guide device for avoiding the occurrence of conveyance failure of the base paper.

Means for Solving the Problems According to the present invention, the above object is to provide a strip-shaped fixed blade extending parallel to the axis of the cylindrical plate cylinder and the axis of the cylindrical plate cylinder. A fixed guide member that is provided so as to extend in parallel and that faces the fixed blade at a predetermined interval to form a guide passage for the base paper for printing between the fixed blade, and along the extending direction of the fixed blade. A movable blade which is provided so as to be reciprocally movable and cuts while moving the width of the base paper in cooperation with the fixed blade, and a movable blade passage closed across the reciprocating passage of the movable blade and continuous with the fixed guide member. A movable guide member that is movable between a position and a movable blade passage opening position that does not traverse the reciprocating passage of the movable blade apart from the fixed guide member;
Brings the movable guide member to the movable blade passage open position when the movable blade is performing the raw paper cutting action, and brings the movable guide member to the movable blade passage closed position when the movable blade is not performing the raw paper cutting action. This is achieved by a printing base paper cutting guide device material of a printing apparatus having a movable guide portion moving means.

According to the above-described structure, the movable guide member closes the reciprocating passage of the movable blade, so that the printing base paper is prevented from entering the passage, and the printing base paper is not conveyed poorly. What happens is avoided in advance. The movable guide member is located at the movable passage closed position when the movable blade is performing the base paper cutting action, and does not hinder the reciprocating movement of the movable blade, which allows the movable blade to move in the width direction of the printing base paper. By this, the base paper for printing can be cut without any trouble.

Example Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows one embodiment and an embodiment of a plate-making printing apparatus incorporating a printing paper cutting guide apparatus according to the present invention. In the figure, reference numeral 1 denotes a cylindrical plate cylinder, which is composed of a cylindrical body having a porous structure and has a clamp means 2 for locking one end of a stencil printing base paper on an outer peripheral surface thereof. Printing ink is provided by an ink supply device (not shown) provided inside and is driven to rotate counterclockwise in the figure by an electric motor (not shown).
A press roller 3 is provided below the cylindrical plate cylinder 1, and the press roller is selectively urged toward the outer peripheral surface of the cylindrical plate cylinder 1 by the electromagnetic force of the press solenoid 4. ing.

A paper feeding device 5 is provided on one side of the press roller 3. The sheet feeding device has a sheet feeding table 6 on which a plurality of printing sheets are stacked, and the printing sheet placed on the sheet feeding table 6 is placed at the top by a sheet separating roller 7 and a sending roller 8. One by one, and is fed between the cylindrical plate cylinder 1 and the press roller 3 by the timing roller 9 and the guide roller 10, and is attached to the outer peripheral surface of the cylindrical plate cylinder 1 when passing between these. The printing ink that has passed through the perforated portion of the existing stencil printing paper is transferred and carries a printed image by this printing ink.

On the other side of the press roller 3, a belt-cove type paper discharging device 11 is provided. The paper discharge device 11 includes a belt conveyor device 12 and a suction box device 13, and the suction box device 13 sucks the printed printing paper stripped off the cylindrical plate cylinder 1 by the separation claws 14 and the belt conveyor device. It is adapted to be conveyed to a paper ejection tray 15 by 12.

A raw paper container 16 is provided on one side of the cylindrical plate cylinder 1. The base paper storage section 16 is adapted to store a continuous sheet-shaped stencil printing base paper S wound in a roll shape.

A plate making device 17 is provided between the base paper storage unit 16 and the cylindrical plate cylinder 1. The plate making device 17 is a heat-sensitive plate making device.
It has a thermal head 18 and a platen roller 19 facing it, and is supplied with the stencil printing base paper S from the stencil paper storage section 16 so that the stencil printing base paper can be thermally processed. Although the thermal head 18 is not shown in the figure,
A plurality of heat generating elements are arranged in a row in a row, that is, in the main scanning direction at regular intervals, and the plurality of heat generating elements are adapted to selectively generate heat in accordance with individually applied image information signals. There is.

A base paper cutting guide device is provided between the plate making device 17 and the cylindrical plate cylinder 1.
40 are provided.

A raw paper stock device 43 is provided between the plate making device 17 and the raw paper cutting device 40. The stencil stock device 43 has a length corresponding to many stencil printing stencil sheets.
Box-shaped base paper stock unit 44 that can store paper in the shape of a meander
And a stencil sheet feeding roller 45 that sends the stencil sheet S to the stencil sheet stock section 44 from the plate making device 17, and the stencil sheet stock section.
A stencil printing base paper S is sent from the stencil printing paper 44 to the stencil paper cutting guide device 40.

A plate discharging device 47 is provided on the other side of the cylindrical plate cylinder 1. The plate discharging device 47 includes a movable base paper stripping claw 48, a plate discharging roller 49, and a plate discharging box 50.

A base paper cutting guide device 40 according to the present invention is well shown in FIGS. The base paper cutting guide device 40 has a band-shaped fixed blade 51 extending parallel to the axis of the cylindrical plate cylinder 1. The fixed blade 51 is arranged substantially horizontally in a rollover state, and has a cutting edge 52 at the tip end on the side close to the cylindrical plate cylinder 1,
The upper surface is configured as a flat surface to serve as a lower raw paper guide surface 53.

A fixed guide member 54 is fixedly arranged above the fixed blade 51. The fixed guide member 54 has a U-shaped cross section and extends parallel to the axis of the cylindrical plate cylinder 1, and the flat lower bottom surface faces the lower base paper guide surface 53 at a predetermined interval and is in the upper portion. It is used as the base paper guide surface 55. Lower base paper guide surface 53 and upper base paper guide surface
55 and 55 form a base paper guide passage 56.

The fixed guide member 54 includes an upper guide rail 57 and a lower guide rail.
58 is attached, and a movable blade holder 59 is reciprocally provided by the rails along the extending direction of the fixed blade 52, that is, in the direction parallel to the axis of the cylindrical plate cylinder 1. . The movable blade holder 59 is guided by an upper guide rail 57 and a lower guide rail 58 so as to be able to reciprocate across the raw paper guide passage 56, and the movable blade holder 59 is movable in a disk shape by a shaft 60. A blade 61 is rotatably mounted about its central axis. The movable blade 61 is the fixed blade 51.
The blade 52 is in sliding contact with the cutting edge 52 and cooperates with it to cut the stencil sheet S.

As shown in FIG. 2, the movable blade 61 has a movable blade holder 59.
Together with the stroke end position corresponding to the retracted position (home position) separated from the base paper guide passage 56 to the left in FIG. 2 and the right side of the base paper guide passage 56 in FIG. The wire 62 is reciprocally driven. The wire 62 is fixedly connected to the movable blade holder 59, and is hung between the drive pulley 63 and the driven pulley 64 to form a substantially endless shape. The drive pulley 63 is integrally provided with a gear 64, the gear 64 meshes with a gear 65, and the gear 65 is integrally provided with a drive gear 66.
66 is selectively rotatably driven by an electric motor or the like (not shown).

A limit switch 67 is attached to the fixed guide member 54, and the limit switch 67 engages with the movable blade holder 59 when the movable blade 61 is in the retracted position to move the movable blade 61.
Is located at the retracted position.

The movable blade shaft 60 is integrally provided with a pinion 68, and the pinion 68 is a crack provided integrally with the lower guide rail 58.
The movable blade 61 meshes with the movable blade holder 58a and rotates as the movable blade holder 59 reciprocates, whereby the movable blade 61 rotates about its own axis as the movable blade 61 reciprocates.

A movable guide member 70 is rotatably attached to the cylindrical plate cylinder 1 side of the fixed guide member 54 by a support shaft 69. The movable guide member 70 has a base paper guide piece 71 extending in a substantially horizontal direction at the lower end thereof, and as shown in FIGS. 4 and 6 when the movable blade 61 is in the retracted position. It is adapted to be in a hanging state due to its own weight and to be positioned at a position where it abuts against the stopper portion 73 of the fixed guide member 54 at the base portion 72. At this time, the base paper guide piece 71 is configured to be continuous with the upper base paper guide surface 55 of the fixed guide member 54 although it crosses the reciprocating path of the movable blade 61, and the position of the movable guide member 70 at this time is changed. This is called the movable blade passage closed position. As shown in FIG. 5, the movable guide member 70 is pivotally displaced in the clockwise direction in the figure about the support shaft 69 from the closed position of the movable blade passage, is inclined and is separated from the fixed guide member 54. Thus, the movable blade 61 can be selectively positioned at the movable blade passage opening position that does not cross the reciprocating passage of the movable blade 61. That is, the movable guide member 70 can be rotated about the support shaft 69 between the movable blade passage closed position and the movable blade passage opened position.

The movable guide member 70 has a movable guide member drive plate that performs a cam action.
74 is installed. The movable guide member 74 has an inclined portion 75 on the retracted position side of the movable blade 61. Further, the movable blade holder 59 is provided with a movable guide member drive protrusion 76,
The protrusion 76 is substantially separated from the movable guide member drive plate 74 when the movable blade 61 is in the retracted position, and the movable guide member 70 is in the hanging state, that is, is located in the movable blade passage closed position. When the movable blade holder 59 moves from the retracted position to the stroke end position, the movable blade holder 59 comes into contact with the surface of the movable guide member drive plate 74 on the fixed member 54 side, and the movable guide member drive plate 74 and the fixed guide member 54. While the movable blade 61 is located at a position where it crosses the base paper guide passage 56 by being inserted between the movable guide member 70 and the base paper guide passage 56, the movable guide member 70 is lifted and rotated as shown in FIG. It can be moved.

Next, the operation of the printing base paper cutting guide device having the above-described configuration will be described mainly with reference to FIGS. 4 to 6. FIG. 4 shows a process in which the new stencil printing base paper S is being conveyed toward the cylindrical plate cylinder 1 by the base paper feed roller 46. At this time, the clamp piece 2a of the clamp means 2 is at the open / close position apart from the magnet plate 2b attached to the cylindrical plate cylinder 1, and the movable blade 61 is stopped at the retracted position as shown in FIG. ing. Therefore, at this time, the movable guide member 70 is in the suspended position at the movable blade passage closed position as shown in FIG. 4, and the base paper guide piece 71 is continuous with the upper base paper guide surface 55 of the fixed guide member 54. The continuous base paper guide surface is continuous from the cutting device to the vicinity of the clamp portion of the cylindrical plate cylinder 1. Therefore, the leading edge of the new printing base paper S is placed at the cylindrical plate cylinder 1 from the base paper cutting device portion.
In the process of advancing to the clamping means 2, the printing base paper never enters into the gap such as the reciprocating passage of the movable blade, and the conveyance is carried out smoothly and surely. still,
At this time, the lower surface of the base paper guide piece 71 is not flush with the upper base paper guide surface 55 and is located above the upper guide surface 55.
If the lower surface of the base paper guide piece 71 is below the upper base paper guide surface 55 at this time, the step prevents the base paper 5 for printing from advancing, and even if the both are at the same height position, the joint between the two is also formed. This is because there is a possibility that the printing base paper S may enter the gap remaining in the above, and these are avoided.

The tip of the new printing base paper S has a clamp piece 2a and a magnet plate 2b.
When the printing base paper S is wound by a predetermined length by being stopped by the cylindrical plate cylinder 1 by the rotation of the cylindrical plate cylinder 1, the drive gear 66 is moved by the action of a control device (not shown). As shown in FIG. 2, the pulley 63 is driven to rotate in the clockwise direction, the pulley 63 rotates in the counterclockwise direction as viewed in FIG. 2, and the wire 62 moves in the direction of arrow A in FIG. As a result, the movable blade holder 59 moves from the retracted position to the right in FIG. 2 toward the stroke end position. Along with the movement of the movable blade holder 59, the movable blade 61 moves from the retracted position toward the stroke end position while rotating around its own central axis, and at the same time, the movable guide member drive projection 76 is a perspective portion. The movable guide member 70 comes into contact with the movable guide member drive plate 74 while being guided by 75, and the protruding portion penetrates between the drive plate 74 and the fixed guide member 54 to move the movable guide member 70 as shown in FIG. The movable blade 61 moves to the blade passage open position, that is, the movable guide member 70 is pushed away, and the movable blade 61 secures its own reciprocating passage while fixing the fixed blade.
It moves across the base paper guide passage 56 in a state of being in contact with the cutting edge 52 of 51, and by this movement, the printing base paper S is cut in the width direction.

When the movable blade 61 finishes cutting the printing base paper S and is located at the stroke end position, the drive gear 66 is reversely driven by the timer control based on the opening / closing of the limit switch 67, whereby the movable blade 61 moves together with the movable blade holder 59. It returns from the stroke end position to the retracted position. At this time, the limit switch 67 is switched, and the rotation of the drive gear 66 is stopped. When the movable blade 61 returns to the retracted position, as shown in FIG. 6, the movable blade guide member drive projection 67 is separated from the movable guide member drive plate 74 again, so that the movable guide member 70 hangs down by its own weight. Then, when the movable blade 61 is positioned at the movable blade passage closed position, the base paper guide piece 71 continues to the fixed guide member 54, and the reciprocating passage of the movable blade 61 is substantially closed. Therefore, even if the leading end of the printing base paper S to be used next is located at the leading end of the base paper guide passage 56 by judgment as shown in FIG. 6 at this time, this moves the movable blade 61 back and forth. Without entering the passage, it is possible to surely avoid the occurrence of conveyance failure when the next printing base paper S is conveyed.

Incidentally, in the above-mentioned embodiment, the movable blade 61 is configured as a rotary blade so as to secure the durability of the blade and to obtain more excellent cutability of the base paper, but this is not required under other conditions. If it is allowed, it may not be a rotary blade but a knife-shaped one. Further, the movement of the movable guide member 70 between the movable blade passage closed position and the movable blade passage open position is dependently performed by the movable blade holder 59, but this drive is performed exclusively by a solenoid device. It may be performed by a power drive.

Further, in the above-mentioned embodiment, the movable blade 61 is configured to return to the original retracted position after the cutting of the printing base paper S, which is shown in FIGS. 2 and 3. A limit switch similar to the limit switch 67 is provided at the right end portion of the fixed guide member 54 in the drawing, and an inclined portion similar to the inclined portion 75 is provided at the right end portion of the movable guide member 70 as well. Alternatively, the retractable position of the movable blade 61 may be formed, and the movable blade 61 may be configured to be moved from one retracted position to the other retracted position to complete one cutting operation of the base paper.

In the above, the present invention has been described in detail with respect to a specific embodiment, but the present invention is not limited to this, and various other embodiments are possible within the scope of the present invention. Will be apparent to those skilled in the art.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing one embodiment of a plate-making printing apparatus incorporating a printing base paper cutting guide apparatus according to the present invention,
FIG. 2 is a front view of a printing base paper cutting guide device according to the present invention, FIG. 3 is a plan view of the printing base paper cutting guide device according to the present invention shown in FIG. 2, and FIGS. FIG. 4 is a side view showing the printing base paper cutting guide device shown in FIGS. 2 and 3 in different operating states. 1 ... Cylindrical plate cylinder, 2 ... Clamping means, 3 ... Press roller, 4 ... Press solenoid, 5 ... Locking device, 6 ... Paper feeding table, 7 ... Paper separating roller, 8 ... Feed roller, 9 …… Timing roller, 10 …… Wide roller, 11 ……
Paper ejection device, 12 …… Belt conveyor, 13 …… Suction lock device, 14 …… Separation pawl, 15 …… Paper tray, 16 …… Base paper storage section, 17…
… Plate making machine, 18 …… Thermal head, 19 …… Platen roller, 20 …… Platen shaft, 40 …… Paper cutting guide device, 43 ……
Base paper stock device, 44 …… Base paper stock unit, 45 …… Thick paper feed roller, 46 …… Base paper feed roller, 47 …… Plate discharge device, 48 …… Base paper stripping claw, 49 …… Plate discharge roller, 50 …… Plate discharge box , 51 …… Fixed blade, 52 …… Cut blade, 53 …… Lower base paper guide surface, 54 …… Fixed guide member, 55 …… Upper base paper guide surface, 56
…… Base paper guide passage, 57 …… Upper guide rail, 58 …… Lower guide rail, 59 …… Movable blade holder, 60 …… Movable blade shaft, 61
...... Movable blade, 62 ...... Wire, 63 ...... Pulley, 64, 65 …… Gear, 66 …… Drive gear, 67 …… Limit switch, 68 …… Pinion, 69 …… Support shaft, 70 …… Movable guide Member, 71 ... Base paper guide piece, 72 ... Base part, 73 ... Stopper part, 74 ... Movable guide member drive plate, 75 ... Inclined part, 76 ... Movable guide member drive projection

Claims (1)

[Claims] 1. A belt-shaped fixed blade extending parallel to the axis of the cylindrical plate cylinder, and a fixed blade extending parallel to the axis of the cylindrical plate cylinder and having a predetermined length relative to the fixed blade. A fixed guide member that faces the fixed blade and forms a guide passage of the printing base paper between the fixed blade and a fixed guide member that is reciprocally movable along the extending direction of the fixed blade and cooperates with the fixed blade. Movable blade that cuts the base paper while moving it in the width direction, a movable blade passage closed position that is continuous with the fixed guide member across the reciprocating movement passage of the movable blade, and the movable blade that is separated from the fixed guide member. A movable guide member that can move between a movable blade passage open position that does not cross the reciprocating passage and a movable guide member that is brought to the movable blade passage open position when the movable blade is performing a base paper cutting action. When the blade is not cutting the base paper Printing sheet cutting guide device for a printing device having a movable guide member moving means for providing a movable guide member to the movable blade passage closed position.