JP2000006510A - Stencil printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stencil printer which shows much ease of operation during eliminating a master jam without increasing a cost and at the same time, is able to make a neat and positive cut and further ensures the simple and secure initial setting of a master. SOLUTION: In the stencil printer which is equipped with a plate cylinder 1, a master storage means 2 for storing a master 6, a makeup means 3 for making up and conveying the master 6 and a cutting means 4 for cutting the master 6, the printer is structured of a movable part 9 provided in a freely opening/closing manner with the fixed part of a device body and a conveying passage for the master 6 which is opened by opening the movable part 9.

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 having an openable master transport path.

[0002]

2. Description of the Related Art Conventionally, digital thermosensitive stencil printing has been known as a simple printing method. This is because a heat-sensitive stencil master (hereinafter, referred to as “master”) having a structure in which a thermoplastic resin film and a porous support are bonded to each other has one minute heating element.
The thermal heads arranged in a row are brought into contact with each other, and the master is transported while making a plate using plate making means such as a platen roller while energizing this heating element in a pulsed manner. After the perforated image is subjected to hot-melt perforation, the perforated master is wound around a porous cylindrical plate cylinder, and the printing paper is pressed against the outer peripheral surface of the plate cylinder by a pressing member such as a press roller. In addition, the ink that has oozed from the opening of the plate cylinder and the perforation of the master is transferred to printing paper to obtain a printed image.

As a master used in digital thermosensitive stencil printing, a sheet-shaped master is generally known, and is stored in a roll state in a printing apparatus. The master in the roll state is set manually by the user with the master transport path opened, and then is made while being pulled out by the plate making means during plate making as described above, and cut by the cutting means every plate. After that, it is wound around the plate cylinder.

[0004] As a master cutting device, for example,
Japanese Patent Application Publication No. 7-84086, which has a movable upper blade and a fixed lower blade, which reciprocates vertically with respect to the fixed lower blade, disclosed in Japanese Patent Publication No. 7-84086. A movable upper blade having a movable lower blade and a fixed lower blade, wherein the movable upper blade moves while rotating in the width direction of the master with respect to the fixed lower blade, disclosed in Japanese Utility Model Publication No. 3-40556; There is one having only the upper blade, which moves while rotating with respect to the master.

[0005] The initial setting of the master is performed manually by the user as described above. However, if the stencil conveying operation is performed in this state, the stencil starting position varies, and
The desired image cannot be obtained. Therefore, after cutting the leading end portion of the master through the master to the downstream side of the cutting means, the master leading edge is conveyed to a plate making start position which is a predetermined position downstream of the cutting means, and the plate making transport operation is performed. However, at the time of initial setting of the master tip, the cut piece of the master tip cut by the cutting means must be manually removed by the user, and the work is very troublesome. There is a problem that the sheet remains on the conveyance path to cause a jam of the master, or to adhere to the surface of the plate cylinder to cause printing failure.

Accordingly, a stencil sheet setting plate for blocking the master transport path is provided at the stencil making start position, a technique for determining the stencil making start position of the stencil by abutting the leading end of the stencil on the stencil setting plate, and an initial setting of the stencil. Japanese Patent Laid-Open No. 8-142 discloses a technique in which a detecting means is provided at each of a reference position and a plate making start position, and a means for controlling conveyance of a master is provided to position the leading end of the master from the reference position to the plate making start position.
No. 480.

[0007]

[Problems to be solved by the invention]
The technique disclosed in Japanese Patent Application Publication No. 08-08,084 requires a high-precision movable upper blade and a fixed lower blade having a width larger than the width of the master, thereby increasing the cost. Since the space between the blade and the blade is very small, there is a problem that the operability of the master during the jam processing is significantly reduced.

In the technique disclosed in Japanese Patent Publication No. 7-84086, the leading end of the succeeding master after cutting is positioned upstream of the fixed lower blade in the transport direction and waits. The thin and soft master is easily deformed into a roll shape under the influence of humidity, so the progress of the master tip is hindered by the edge of the fixed lower blade tip when making the next plate. In addition to the problem that the surface becomes uneven or jamming during cutting, the problem that the cost increases, and the movable upper blade is fixed to the fixed lower blade with a predetermined interval between them There is a problem that the operability during jam clearance of the master is significantly reduced due to the support.

In the technique disclosed in Japanese Utility Model Publication No. 3-40556, only the upper blade has no lower blade.
At the time of cutting, the master easily escapes downward, which is the direction opposite to the upper blade, and there is a problem that the cut surface becomes irregular or cannot be cut.

Further, in the technique disclosed in Japanese Patent Application Laid-Open No. 8-142480, when the leading edge of a thin and soft master is abutted against a base paper set plate, the abutted master end is in a curled shape or on the base paper set plate. Deformation into a digging shape, resulting in conveyance jams and conveyance skew without good conveyance, wrinkles and skew due to the need for expensive sensors and increased conveyance frequency There is a problem that the frequency increases, and furthermore, it is necessary to control the conveyance from the reference position to the plate making start position, and the control at the time of abnormal processing becomes complicated.

The present invention solves the above-mentioned problems, provides good operability at the time of jam clearance of the master without increasing the cost, and makes it possible to perform clean and reliable cutting. It is an object of the present invention to provide a stencil printing apparatus capable of performing a reliable initial setting of a master.

[0012]

According to the first aspect of the present invention,
A porous cylindrical rotatable plate cylinder, master storage means for storing a roll-wound master, and the master drawn out from the master storage means, which is disposed on the conveyance path of the master. In a stencil printing machine, comprising: a stencil making means for stencil making and conveying, and a cutting means arranged on the conveying path downstream of the stencil making means in the master conveying direction, and a cutting means for cutting the master. It has a movable portion provided so as to be openable and closable, and the transport path is opened by opening the movable portion.

According to a second aspect of the present invention, in the stencil printing machine according to the first aspect, when the movable portion is opened, the transport path is provided in a range from the master storage means to a downstream side of the cutting means. It is characterized by being opened.

According to a third aspect of the present invention, in the stencil printing machine according to the first aspect, when the movable portion is opened, the transport path is opened in a range from the master storage means to the plate cylinder. It is characterized by the following.

According to a fourth aspect of the present invention, in the stencil printing apparatus according to the first, second, or third aspect, the plate making means further comprises a thermal head and a platen roller, and the thermal head comprises the thermal head. It is characterized in that the platen roller is provided on each of the movable portions on the fixed portion.

According to a fifth aspect of the present invention, in the stencil printing apparatus according to the fourth aspect, a platen roller driving means for driving the platen roller is provided on the fixed portion, and when the movable portion is closed. A driving force transmitting unit for transmitting a driving force from the platen roller driving unit to the platen roller is provided.

According to a sixth aspect of the present invention, in the stencil printing machine of the fifth aspect, the driving force transmitting means is a forward turning gear.

According to a seventh aspect of the present invention, in the stencil printing machine according to the sixth aspect, the forward shift gear is further provided with a chamfer at a corner of the tip.

According to an eighth aspect of the present invention, in the stencil printing apparatus according to any one of the first to seventh aspects, further, the cutting means is arranged in a master width direction orthogonal to a master transport direction. A cutting means body extending and also serving as a conveyance guide for the master, and a pair of rotating blades having a part of a peripheral edge overlapping each other and rotatable in opposite directions to reciprocate in the master width direction across the conveyance path. A cutter member movably supported by the cutting means main body; and a rotary moving means for rotating the pair of rotary blades while reciprocating the cutter member in a master width direction.

According to a ninth aspect of the present invention, in the stencil printing machine according to the eighth aspect, the cutter member is provided at a position where the disposition of the master when the master is not cut is outside the transport path. It is characterized by being.

According to a tenth aspect of the present invention, in the stencil printing machine according to the eighth or ninth aspect, further, an elastically deformable guide member that forms the transport path with the cutting means main body is formed of the cutter member. It is characterized by being provided on the upstream side in the master transport direction.

According to an eleventh aspect of the present invention, in the stencil printing apparatus of the tenth aspect, the guide member further comprises:
A plurality of openings are provided at a portion facing the transport path.

According to a twelfth aspect of the present invention, in the stencil printing apparatus according to any one of the eighth to eleventh aspects, the stencil printing apparatus further includes a master tip position during initial setting and a master tip position during stencil making operation standby. The position is the same as the master cutting position.

According to a thirteenth aspect of the present invention, in the stencil printing machine according to the twelfth aspect, further, the position for retracting from the reciprocating space of the cutter member at the time of the initial setting to the master cutting position and other than at the time of the master setting. A master leading end set position index provided so as to be able to advance and retreat in conjunction with opening and closing of the movable portion.

According to a fourteenth aspect of the present invention, in the stencil printing apparatus according to any one of the eighth to thirteenth aspects, the first stencil printing apparatus further includes a first stencil facing the conveyance path and assisting conveyance of the master. A movable guide plate that is movable to a position and a second position retracted from the reciprocating space of the cutter member, and occupies the second position when the cutter member moves. It is characterized by having on the side.

According to a twentieth aspect of the present invention, in the stencil printing machine according to the twelfth aspect, the stencil printing apparatus further includes a first position facing the transport path and assisting transport of the master, and a position within the reciprocating space of the cutter member. A movable guide plate which is movable to the retracted second position and occupies the second position when the cutter member is moved, on the downstream side of the cutting means main body in the master transport direction, and wherein the movable guide plate is It is characterized by having a master tip position index at the master cutting position.

[0027]

FIG. 1 is a schematic view of a main part of a stencil printing apparatus adopting a first embodiment of the present invention. In FIG. 1, the stencil printing apparatus includes a plate cylinder 1, a master storage unit 2, a plate making unit 3, a cutting unit 4, and the like.

The porous cylindrical plate cylinder 1 rotatably supported by the main body of the stencil printing apparatus has a clamper 5 for holding a stencil-made master on the outer peripheral surface thereof. Is driven to rotate.

In FIG. 1, a master storage means 2 is disposed at the upper right of the plate cylinder 1. The master storage means 2 has a master roll 6 formed by winding a master 6 formed by bonding a porous support and a thermoplastic resin film into a roll.
The core 6a is rotatably and detachably supported.

A plate making means 3 is disposed between the plate cylinder 1 and the master storage means 2. The plate making means 3 is rotated by a thermal head 7 for heating and perforating the thermoplastic resin film surface of the master 6 and a stepping motor 30 as a platen roller driving means shown in FIG. And a driven platen roller 8. The thermal head 7 is attached to a side plate (not shown) of the main body of the stencil printing apparatus, which is a fixed part. It is rotatably mounted. A relief hole (not shown) having a width larger than the width of the master 6 is formed in a portion of the cover 9 near the support shaft 9a so as to allow the master 6 that has been made to be sufficiently bent.

A pinion gear 31 is attached to an output shaft (not shown) of the stepping motor 30 attached to the stencil printing apparatus main body. The pinion gear 31 meshes with a first idle gear 32 rotatably supported by the stencil printing apparatus main body. are doing. A second idle gear 33 having a smaller diameter than the first idle gear 32 is provided integrally on the same axis as the first idle gear 32. A drive gear 34 provided integrally with the platen roller 8 is provided coaxially with a rotation shaft (not shown) of the platen roller 8. The third drive gear 34 is rotatably supported by the cover 9. It is in mesh with the idle gear 35. The second idle gear 33 and the third idle gear 35 mesh when the cover 9 is closed, and the driving force of the stepping motor 30 is transmitted to the platen roller 8. Driving force transmission means is constituted by 33 and the third idle gear 35.

Here, as the second idle gear 33 and the third idle gear 35, as shown in FIG. 8 (a), forwardly displaced gears whose respective cutting edges are forwardly displaced are used. This is because, when the second idle gear 33 and the third idle gear 35 having a cutting edge that is not shifted forward as shown in FIG. 9A are used, when the cover 9 is closed, FIG. As shown in FIG. 8, there occurs a problem that the blades collide with each other and the cover 9 is not closed or the blades are damaged. However, if the blades with the forwardly displaced blades are used, as shown in FIG. This is because the collision between them can be prevented, and the above-described problem can be prevented. Further, as shown in FIG. 10, the use of the second idle gear 33 and the third idle gear 35 having chamfered corners of the cutting edge makes it possible to reduce the amount of forward displacement and improve the strength of the cutting edge. It is possible to improve the meshing while making it possible.

Further, in the above-described configuration, the thermal head 7 and the stepping motor 30 are both disposed on the stencil printing apparatus main body side, which is the fixed part side, and such driving means is provided on the cover 9 side, which is the movable part side. Since it does not exist, the movable portion side is lightweight and easy to open and close, so that there is no need to perform wiring over the stencil printing apparatus main body and the cover 9 and it is not necessary to provide a connection means such as a connector. In addition, it is possible to prevent problems such as disconnection and poor connection when the cover 9 is opened and closed. Further, since the thermal head 7 is attached to the stencil printing apparatus main body side and the heat generating body faces upward when the cover 9 is opened, the thermal head 7 can be easily cleaned.

On the downstream side of the plate making means 3 in the master transport direction,
A guide plate 10 for transporting the master 6 and a transport roller 11 are provided. The guide plate 10 is fixed to a side plate (not shown) of the stencil printing apparatus main body. The transport roller 11, which is rotated and driven substantially in synchronization with the platen roller 8 by a drive unit and a driving force transmission unit (not shown) attached to the stencil printing apparatus main body, is attached to the cover 9. The peripheral speed of the transport roller 11 is set slightly higher than the peripheral speed of the platen roller 8, and at a portion between the platen roller 8 and the transport roller 11,
A predetermined tension is applied to the master 6 that has been made. The driving means for the transport roller 11 is a platen roller 8.
, Ie, a configuration in which the rotational force of the platen roller 8 is transmitted to the transport roller 11 via an idle gear (not shown).

The cutting means 4 is provided downstream of the transport roller 11 in the master transport direction. The cutting means 4 is shown in FIG.
As shown in FIG. 5 to FIG. 5, it mainly comprises a frame 12 as a cutting means main body, a holder 13 as a cutter member, a rotary moving means 14 and the like.

A frame 12 formed by bending a plate material into a substantially U-shape and having a length exceeding the width of the master 6.
Is fixed to a side plate (not shown) of the main body of the stencil printing machine such that its longitudinal direction is along the master width direction orthogonal to the master transport direction. The frame 12 in which the upper surface 12a is formed in a planar shape and one side end is turned back to form the side wall 12b is arranged so that the upper surface 12a forms substantially the same plane as the guide plate 10, and A bracket 15 is attached to a side end of the bracket to form a side wall. The lower end of the frame 12 on the downstream side in the master transport direction of the lower surface 12c is bent upward to form a stopper 12d.

An upper blade holder 13a rotatably supporting a disk-shaped upper blade 16a, and a lower blade 16b having the same shape as the upper blade 16a.
Is rotatably supported by the frame 12 having a lower blade holder 13b for rotatably supporting the holder 13 and a connecting portion 13c for integrally connecting the holders 13a and 13b.

The lower blade holder 13b, of which approximately half is disposed so as to be movable within the space of the frame 12, has a lower blade 16b at the downstream end in the master transport direction and is integrally provided coaxially with the lower blade 16b. The lower roller 17b made of a high frictional resistance member is rotatably supported. The lower roller 17b has its peripheral surface in contact with the inner surface of the upper surface 12a. A portion of the lower blade holder 13b disposed inside the space of the frame 12 has a bidirectional screw bush 1 that is screwed with a bidirectional feed screw 18 that constitutes a rotation moving unit 14 described later.
3d is provided.

The upper blade holder 1 connected to the lower blade holder 13b with a slight gap provided by the connecting portion 13c.
3a rotatably supports the upper blade 16a and the upper roller 17a formed of a high frictional resistance member provided coaxially and integrally therewith. The upper blade 16a is disposed at a position where a part of the blade surface overlaps the lower blade 16b, and the upper roller 17a has its peripheral surface in contact with the upper surface 12a so as to sandwich the upper surface 12a with the lower roller 17b.

With the above configuration, when the holder 13 moves along the frame 12, the rollers 17a and 17b rotate in the opposite directions with this movement, and are provided integrally with the rollers 17a and 17b. The blade 16a and the lower blade 16b rotate in opposite directions.

The frame 12 is provided with a rotary moving means 14. The rotation moving means 14 includes a bidirectional feed screw 18,
It is mainly composed of a motor 19. The bidirectional feed screw 18 has a well-known configuration in which an X-shaped groove is formed, and the bidirectional screw bush 1 screwed by rotating in one direction.
Reciprocate 3d. One end of the bidirectional feed screw 18 is rotatably supported by the side wall 12b, and the other end thereof is rotatably supported by the bracket 15, and a drive gear 18a is integrally mounted at a position penetrating the bracket 15 on the other end. I have.

The bracket 15 constituting the side wall on the other end side of the frame 12 is formed by bending a plate material, and a portion connected to the side wall is abutted against the lower surface 12c, and one end continuous with the abutting surface is parallel to the side wall. It is launched vertically so that it becomes. Also, the other end connected to the side wall is the upper surface 1
It is bent perpendicularly so as to be parallel to 2a and to have a predetermined gap with the upper surface 12a.

A motor 19 is attached to one end of the bracket 15. The motor 19 is supplied with power from a power source (not shown) and is driven to rotate. A pinion 19a that meshes with the drive gear 18a is attached to the output shaft. A limit switch 20 for determining an initial position of the holder 13 is attached between the other end of the bracket 15 and the upper surface 12a.

At a position between the transport roller 11 and the cutting means 4, a first guide member 21 as a guide member is provided. The first guide member 21 disposed on the upstream side in the master transport direction of the holder 13 as a cutter member,
Guide member main body 21a with one end attached to cover 9
And a guide piece 21b attached to the other end of the guide member main body 21a. The guide piece 21b whose base end is fixed to the guide member body 21a is made of an elastic body such as a thin metal plate or a thin resin plate.
As shown in the figure, the upper end is located above the master 6 during the plate making standby and during the plate making conveyance, and the free end thereof is disposed between the upper blade holder 13a and the upper surface 12a when the holder 13 moves. . The guide piece 21b is attached to the upper blade holder 13a when the upper blade holder 13a moves.
A slope for guiding between the upper surface 12a and the upper surface 12a is formed at the distal end in the moving direction.

Downstream of the cutting means 4 in the master transport direction,
The second guide member 22 and the movable guide plate 23 are provided. One end of the second guide member 22 is attached to the cover 9, and the other end is bent, and guides the master 6, which has been subjected to plate making and bending, toward a relief hole (not shown) formed in the cover 9.

The movable guide plate 23, which is arranged to face the second guide member 22 via the transport path of the master 6, has its base end swingably supported by a side plate (not shown) of the stencil printer main body. The end is located in the movement path of the holder 13 of the cutting means 4 and below the frame 12. The movable guide plate 23 has a solid line position (first position) and a free end thereof moved by the guide plate swinging means (not shown) such as a solenoid fixed to a side plate (not shown) of the stencil printing apparatus main body. It is selectively positioned at the two-dot chain line position (second position) in the more retracted view. Thus, a member that guides the transfer of the master continuously with the upper blade 16a and the lower blade 16b can be disposed on the downstream side of the arrangement position of the upper blade 16a and the lower blade 16b in the master transfer direction. Since a large gap or a step is not generated between the guide plate 25 and a guide plate 25 described later, conveyance failure of the master 6 is prevented.

During the cutting operation of the master 6, the holder 1
As shown in FIG. 4, a master tip setting position index 23a, which is a guide of the tip position of the master 6 at the time of initial setting of the master 6, is provided substantially at the center of the upper surface of the movable guide plate 23 which retreats from the movement path of No. 3. Have been. The master tip set position index 23a is provided integrally with the movable guide plate 23 by silk printing, engraving, decal, or the like. Thereby, at the time of initial setting of the master 6, after the cover 9 is opened, the leading end of the master 6 is pulled out from the new master roll 6a, and the leading end of the arrow of the master leading end setting position index 23a is located where the visibility of the central portion of the master transport path is good. Anyone can easily perform the initial setting of the master 6 simply by adjusting the tip of the master 6 pulled out to the unit.

Here, even if the cutting position of the master 6 by the cutting means 4 is directly used as the next plate-making standby position, the holder 13 is at a position deviating from the transfer path of the master 6 when cutting is not performed. Since the master 6 is formed by the movable guide plate 23 and the movable guide plate 23, there is nothing that the leading end of the master 6 gets caught when the master 6 is transported next time. Therefore, it is not necessary to re-transport the master 6 after cutting, so that a master leading edge detection sensor and the like can be omitted, and the transport control of the master 6 is simplified.

As can be seen from FIG. 4, the initial setting position of the master 6 indicated by the arrow tip of the master tip setting position index 23a also depends on the upper blade 16a and the lower blade 1 of the cutting means 4.
6b can be set at the same position as the cutting position of the master 6, and the initial setting position, the plate making standby position, and the cutting position can all be processed as the same position, and the master transport control can be simplified.

Further, at the time of the above-mentioned initial setting of the master, the guide piece 21b presses the master 6 from above when the cover 9 is closed, so that the curl of the master tip is extended and the curl of the master tip caused by leaving for a long period of time is prevented. can do.

Guide plates 24 and 25 are disposed downstream of the movable guide plate 23 in the master transport direction. A guide plate 24 located above the master transport path is attached to a side plate (not shown) of the stencil printing apparatus main body, and guides the master 6 which has been subjected to stencil making and has been bent to the plate cylinder 1. Guide plate 2 arranged opposite to guide plate 24 via the master transport path
Reference numeral 5 is attached to a side plate (not shown) of the stencil printing apparatus main body. The guide plate 25 has a brake roller 2 to be described later.
A notch (not shown) is formed to allow the peripheral surface of No. 6 to face the master transport path.

A brake roller 26 is provided near the downstream end of the guide plate 25 in the master transport direction. Brake roller 26 whose outer peripheral surface is coated with a high frictional resistance member
Is rotatable and rotatable through a torque limiter (not shown), and is selectively positioned between a solid line position and a two-dot chain line position in the figure by a roller swinging means (not shown).

The operation of the stencil printing apparatus based on the above configuration will be described below. After the cover 9 is opened and the user pulls out the tip of the master 6 from the new master roll 6a set in the master storage means 2, and the tip is adjusted to the master tip setting position index 23a (see FIG. 4), the cover is closed. When the master 9 is closed and a plate making start key (not shown) is pressed, the master making operation is started after the master of the previous plate has been peeled off from the outer peripheral surface of the plate cylinder 1. The plate cylinder 1 stands by in the state shown in FIG. 1 with the clamper 5 opened.

First, the platen roller 8 and the transport roller 11 are driven to rotate in synchronization with each other, and the master 6 is pulled out from the master roll 6a. The drawn-out master is conveyed by a platen roller 8 and a conveyance roller 11 while being subjected to heat melting perforation plate making by a thermal head 7. At this time, the cutting means 4 is at the initial position retracted from the master transport path shown by the two-dot chain line in FIG. 5, the movable guide plate 23 is at the solid line position in FIG. 1, and the brake roller 26 is at the two-dot chain line position in FIG. Are positioned respectively.

The master 6 having been made is transported on the upper surface 12a (see FIG. 3), passes between the guide pieces 21b, and is transported between the guide plates 24 and 25 on the movable guide plate 23 to be clamped. Sent to 5. During this transfer, the cutting unit 4 is positioned at the initial position retracted from the master transfer path, so that the master 6 can be transferred well. When it is determined from the number of steps of the stepping motor 30 (see FIG. 2) that rotationally drives the platen roller 8 that the tip of the master 6 has reached the clamper 5, the clamper 5 is closed and roller swing means (not shown) is closed. Operates to position the brake roller 26 at the position indicated by the solid line in FIG.

After this, the platen roller 8 and the transport roller 11 continue to rotate, and the master 6 that has been made is bent at a position between the second guide member 22 and the guide plate 24. When it is determined from the number of steps of the stepping motor 30 that the amount of bending has reached a predetermined amount, the plate cylinder 1 is rotated clockwise in FIG. 1 by a predetermined angle at which the amount of bending is eliminated. At this time, since the master 6 held by the clamper 5 rotates the brake roller 26 via the torque limiter, a predetermined tension is applied to the master 6 at a portion between the clamper 5 and the brake roller 26.

When the plate making and winding operations described above are repeated, and it is determined from the number of steps of the stepping motor 30 that the master 6 for one plate has been made and conveyed, the rotation of the platen roller 8 and the conveying roller 11 is stopped. . Immediately before the last bending of the master 6 that has been made is eliminated by the rotation of the plate cylinder 1, a guide plate swinging means (not shown) is operated to move the movable guide plate 23 to the position indicated by the two-dot chain line in FIG. ), And immediately after that, the motor 19 is operated to reciprocate the holder 13 at high speed, and the master 6 is cut. The cut master 6 is pulled out by the rotation of the plate cylinder 1, and the winding operation is completed.

When the master 6 is cut (when the holder 13 moves forward), the guide piece 21b is moved to the upper blade holder 13a.
As shown in FIG. 3, the master 6 is securely guided and guided between the upper blade 12a and the upper blade 16a and the lower blade 16a.
Since the two rotary moving blades b cut the master 6 while holding it, the master 6 can be prevented from rising, deforming, running out, etc. as much as possible, and the master 6 can be cut satisfactorily (FIG. See also 5).

Further, the guide piece 21b presses the master 6 from above, and moves the master 13 from the upstream side in the holder moving direction between the upper blade holder 13a and the upper surface 12a from the end in the width direction as the holder 13 moves. 2, the master 6 is stuck to the second guide member 22 under the influence of static electricity, as shown by the two-dot chain line in FIG.
Since the bending is formed between the guide member 21 and the second guide member 22, it is possible to prevent a cutting failure in which the holder 13 cannot be cut under the bending of the master 6.

The movable guide plate 23 is placed at the solid line position (first position) in FIG. 1 until just before cutting to guide the transfer of the master 6, and does not interfere with the holder 13 during cutting (second position). By retracting to (2), the transportability of the master 6 can be improved and occurrence of transport failure can be prevented.

Further, since the platen roller 8, the transport roller 11, the first guide member 21, and the second guide member 22 are opened together with the cover 9, the cover 9 is opened even if a jam of the master 6 occurs. The transport path can be easily opened, and the jam clearance of the master can be easily performed.

As a modification of the first embodiment, instead of the first guide member 21, as shown in FIG. 6, a guide member main body 27a and a plurality of openings whose base ends are fixed to the guide member main body 27a are provided. The first guide member 27 including the guide piece 27b having the 27c may be used. Since the first guide member 27 can be elastically deformed without using a very thin member as the guide piece 27b, durability and handleability can be improved and cost can be reduced. .

As a guide member, a guide piece 21
By using an elastically deformable member such as the first guide members 21 and 27 having the first and second guide members 27b and 27b, the gap between the upper blade holder 13a and the upper surface 12a can be set wide, and it is not necessary to perform positioning with high accuracy. The handling at the time of processing is improved, and the cost can be reduced.

Further, as another modified example of the first embodiment, as shown in FIG. 7, instead of the movable guide plate 23, an arm slidably supported by a side plate (not shown) of the stencil printer main body. A movable guide plate 28 having a portion 28a and a stopper 29 for regulating the swing of the movable guide plate 28 are used. As the holder 13, the upper blade holder 13a is located downstream from the upstream side in the moving direction (in FIG. 7, the near side in the drawing). The inclined surface 13 inclined upward toward the side (in FIG. 7, the back side of the paper).
e, the movable guide plate 2
8 and the free end of the holder 13
7 can be moved by its own weight to the position shown by the two-dot chain line in FIG. 7 (the second position) retracted from the movement route of FIG.
7 can be positioned at the solid line position (first position) in FIG. 7 which assists the transfer of the master 6, so that the configuration is simplified and the movement of the movable guide plate and the holder is reliably synchronized. Can be.

FIG. 11 shows a second embodiment of the present invention. The second embodiment is different from the first embodiment only in that a fixed guide plate 36 and a master tip set position index 37 are used instead of the movable guide plate 23. Are the same.

The fixed guide plate 36 formed so that the front end portion is gently inclined downward is disposed such that the front end position thereof is located immediately downstream of the frame 12 in the master transport direction. The fixed guide plate 36 is provided with a gap between the tip position and the frame 12 that is sufficient for the upper blade 16a and the lower blade 16b to pass therethrough. The section 13c is set so as not to interfere. In addition, the fixed guide plate 36
Is provided with a notch 36a having a shape slightly larger than the master leading end set position index 37.

The master tip setting position index 37 made of a plate material bent in a hook shape is provided integrally with the same mark as the master tip setting position index 23a on the tip portion 37a in the same manner. Master tip set position index 37
Has its base end rotatably supported by the main body of the stencil printing apparatus. The tip 37a is moved to the position shown in FIG.
3 and is selectively positioned at a position (not shown) below the fixed guide plate 36.

With the above-described configuration, the master 6 is positioned while the master tip setting position index 37 is positioned at the position shown in FIG.
By retracting the master leading end set position index 37 during the operation of the cutting means 4, substantially the same effect as in the first embodiment can be obtained.

The inclination of the tip of the fixed guide plate 36 is exaggerated in relation to the size of the holder 13, but even if the tip of the master 6 is curled. It is formed so that it can be transported while the curl state is sufficiently corrected.

FIG. 13 shows a third embodiment of the present invention. The third embodiment is different from the first embodiment only in that a movable guide plate 38 and a master tip position indicator 37 are used instead of the movable guide plate 23. Are the same.

The movable guide plate 38 is different from the movable guide plate 23 only in that a notch 38 a having a shape slightly larger than the master tip set position index 37 is provided at the tip end. Are the same.

With this configuration, when the master 6 is initially set, the master 6 is positioned with the master tip setting position indicator 37 positioned at the position shown in FIG. By retracting the set position index 37 and the movable guide plate 38, the same effect as in the first embodiment can be obtained, and the positions of the movable guide plate 38 and the master tip set position index 37 with respect to the transport surface of the master 6 can be obtained. Therefore, it is possible to prevent the tip of the master 6 from being caught by a slight protrusion such as the master tip setting position index 23a in the first embodiment formed by silk printing or decal.

FIG. 14 shows a fourth embodiment of the present invention. The fourth embodiment is different from the above embodiments in that a guide plate 39, a link 40,
The difference is only in the use of 41, and the other configuration is the same.

The guide plate 39 has its base end supported by a support shaft 39a rotatably provided on the main body of the stencil printing apparatus. A link 40 having an elongated hole 40a formed near the free end is attached to the support shaft 39a.
A pin 41a provided near the free end of a link 41 whose base end is attached to the support shaft 9a of the cover 9 is engaged with a.

With the above configuration, when the cover 9 is opened, the support shaft 9a rotates, and the link 41 integrated therewith swings in the direction of the arrow in the figure. With the swing of the link 41, the link 40 also swings in the direction of the arrow in the figure, and the guide plate 3 integrated with the support shaft 39a.
9 rotates to the position indicated by the two-dot chain line in the figure, and the conveyance path of the master 6 is opened in the range from the master storage means 2 to the plate cylinder 1. Instead of this configuration, a configuration may be adopted in which gears are attached to the support shafts 9a and 39a, and an odd number of idle gears are arranged between the gears.

In the configuration of the first to third embodiments, that is, in the configuration shown in FIG. 1, the transport path of the master 6 is opened in a range from the master storage means 2 to the downstream side of the cutting means 4. Attach a guide plate 24 to 9
If the cover 9 is configured to be detachable from the stencil printing apparatus main body, the transport path of the master 6 is opened in the range from the master storage means 2 to the plate cylinder 1 as in the fourth embodiment.

In each of the above embodiments, the thermal head 7 constituting the plate making means 3 is attached to the side plate of the apparatus main body (not shown), and the platen roller 8 is attached to the cover 9.
, The master transport path can be opened. Alternatively, a configuration may be adopted in which the thermal head 7 is attached to the cover 9 and the platen roller 8 is attached to an apparatus main body side plate (not shown).

[0078]

According to the first aspect of the present invention, even if a jam of the master occurs, the transport path of the master can be easily opened, so that the jam of the master can be easily processed.

According to the second aspect of the present invention, even when a master jam occurs, the master transport path from the master storage means to the downstream side of the cutting means can be easily opened, so that the master jam can be cleared. Can be done easily.

According to the third aspect of the invention, even when a master jam occurs, the master transport path from the master storage means to the plate cylinder can be easily opened.
The jam processing of the master can be easily performed.

According to the fourth aspect of the present invention, since the thermal head is provided on the fixed portion and the platen roller is provided on the movable portion, the plate making means is opened when the movable portion is opened, and the master is initialized. The setting and the jam processing can be easily performed, and the thermal head can be easily and reliably cleaned.

According to the fifth aspect of the present invention, since the platen roller driving means is provided on the fixed part, it is not necessary to provide a driving means, a wiring, a connector or other connecting members on the movable part side, and wiring can be facilitated. In addition, it is possible to prevent problems such as disconnection and poor connection at the time of opening and closing the movable part.

According to the sixth aspect of the present invention, since the driving force transmitting means is a forward shift gear, the meshing of the gears when the movable portion is closed is improved, and the cutting edges of the gears contact each other to close the movable portion. It is possible to prevent such a problem that the operation cannot be performed.

According to the seventh aspect of the present invention, the chamfered edge of the forwardly displaced gear is chamfered, so that the forward displaced amount can be reduced, and the engagement is improved while improving the edge strength. be able to.

According to the eighth aspect of the present invention, since the pair of rotary blades cut while holding the master, lifting, deformation and escape of the master can be prevented as much as possible.
The master can be cut well. In addition, since there is no fixed blade, the conveyance of the master is not hindered and the cost can be reduced.

According to the ninth aspect of the present invention, since the disposition position of the cutter member when the cutter member is not cut is provided at a position outside the transfer path of the master, the transfer path of the master when the movable portion is opened. Is opened to the downstream side of the cutting means, so that the jam clearance of the master can be easily performed.

According to the tenth aspect of the present invention, since the guide member presses the master, it is possible to further prevent the master from being lifted, deformed, and escaped, and to cut the master more favorably.

According to the eleventh aspect of the present invention, since the guide member can be elastically deformed without using an extremely thin member, the durability and handleability are improved and the cost is reduced. it can.

According to the twelfth aspect of the present invention, there is no need to re-transfer the master after cutting, and the master transport control can be simplified.

According to the thirteenth aspect, anyone can easily perform the initial setting of the master.

According to the fourteenth aspect of the present invention, the movable guide plate guides the transfer of the master until immediately before cutting, and at the time of cutting, retracts to a position where it does not interfere with the cutter member, thereby improving the transferability of the master. It is possible to prevent occurrence of transport failure.

According to the fifteenth aspect of the present invention, the movable guide plate guides the conveyance of the master until immediately before cutting, and at the time of cutting, retracts to a position where it does not interfere with the cutter member. It is possible to prevent the occurrence of a transport failure, and it is possible for anyone to easily perform the initial setting of the master.

[Brief description of the drawings]

FIG. 1 is a schematic view of a main part of a stencil printing apparatus used in each of first to third embodiments of the present invention.

FIG. 2 is a schematic diagram of plate making means and cutting means used in each of the first to fourth embodiments of the present invention.

FIG. 3 is a front view of a cutting means used in each of the first to fourth embodiments of the present invention.

FIG. 4 is a plan view of a cutting means and a movable guide plate used in the first embodiment of the present invention.

FIG. 5 is a side view of the cutting means used in the first embodiment of the present invention.

FIG. 6 is a partial plan view of a guide member used in a modification of the first embodiment of the present invention.

FIG. 7 is a front view illustrating a movable guide plate and a cutting means used in another modification of the first embodiment of the present invention.

FIG. 8 is a view showing (a) a cover not closed state and (b) a cover closed state of a forward shift gear used as a driving force transmitting means in each of the first to fourth embodiments of the present invention.

FIGS. 9A and 9B are diagrams showing (a) a cover not closed state and (b) a cover closed state when a normal gear is used as a driving force transmitting means.

FIG. 10 is a view showing a forward gear used as a driving force transmitting means in another modified example of each of the first to fourth embodiments of the present invention.

FIG. 11 is a plan view of a cutting means and a movable guide plate used in a second embodiment of the present invention.

FIG. 12 is a front view of a cutting means and a movable guide plate used in a second embodiment of the present invention.

FIG. 13 is a plan view of a cutting means and a movable guide plate used in a third embodiment of the present invention.

FIG. 14 is a schematic diagram of a main part of a stencil printing machine showing a fourth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plate cylinder 2 Master storage means 3 Plate making means 4 Cutting means 6 Master 7 Thermal head 8 Platen roller 9 Moving part (cover) 12 Cutting means main body (frame) 13 Cutter member (holder) 14 Rotary moving means 16a A pair of rotating blades ( Upper blade 16b A pair of rotary blades (lower blade) 21, 27 Guide member (first guide member) 23, 28, 38 Movable guide plate 23a, 37 Master tip set position index 27c Opening 33 Drive force transmitting means (second Idle gear) 35 Driving force transmission means (third idle gear)

Claims (15)

[Claims] 1. A rotatable plate cylinder having a porous cylindrical shape, master storage means for storing a roll-wound master, and a master storage means disposed on a conveying path of the master and drawn out from the master storage means. A stencil printing device comprising: a stencil making means for making the stencil master; and a stencil cutting means arranged on the conveying path downstream of the stencil making means in the master conveying direction, for cutting the master. A stencil printing machine, comprising: a movable section provided to be able to open and close with respect to a fixed section, wherein the transport path is opened by opening the movable section. 2. The stencil printing apparatus according to claim 1, wherein when the movable section is opened, the transport path is opened in a range from the master storage section to a downstream side of the cutting section. 3. The stencil printing apparatus according to claim 1, wherein when the movable section is opened, the transport path is opened in a range from the master storage means to the plate cylinder. 4. The plate making means includes a thermal head and a platen roller, wherein the thermal head is provided on the fixed portion, and the platen roller is provided on the movable portion, respectively. The stencil printing apparatus according to claim 2. 5. A driving force for driving the platen roller, the driving force being provided to the fixed portion, and transmitting a driving force from the platen roller driving device to the platen roller when the movable portion is closed. 5. The stencil printing apparatus according to claim 4, further comprising a transmission unit. 6. The stencil printing machine according to claim 5, wherein said driving force transmitting means is a forward turning gear. 7. The stencil printing machine according to claim 6, wherein the forward shift gear is chamfered at a corner of a tip of the gear. 8. The cutting means comprises a cutting means body extending in a master width direction orthogonal to the master conveyance direction and also serving as a conveyance guide of the master, and a pair of peripheral portions partially overlapping each other and rotatable in opposite directions. A cutter member having a rotary blade and movably supported by the cutting means main body so as to reciprocate in the master width direction across the transport path; and a pair of the cutter members while reciprocating the cutter member in the master width direction. The stencil printing apparatus according to any one of claims 1 to 7, further comprising: a rotation moving unit configured to rotationally drive the rotary blade. 9. The stencil printing apparatus according to claim 8, wherein said cutter member is provided at a position outside said transport path when said master is not cut. 10. The apparatus according to claim 8, further comprising an elastically deformable guide member that forms said transport path with said cutting means main body, upstream of said cutter member in a master transport direction.
Or a stencil printing apparatus according to claim 9. 11. The apparatus according to claim 10, wherein said guide member has a plurality of openings at a portion facing said transport path.
A stencil printing apparatus as described in the above. 12. A master tip position during initial setting and a master tip position during plate making operation standby are set to the same position as a master cutting position. A stencil printing apparatus according to claim 1. 13. A master provided at the master cutting position at the time of initial setting, and at a position retreating from the reciprocating space of the cutter member except at the time of master setting so as to be able to advance and retreat in conjunction with opening and closing of the movable portion. 13. The stencil printing apparatus according to claim 12, further comprising a tip setting position index. 14. The cutter member is movable between a first position facing the transfer path and assisting the transfer of the master and a second position retracted from the reciprocating space of the cutter member. The stencil printing apparatus according to any one of claims 8 to 13, further comprising a movable guide plate that sometimes occupies the second position on the downstream side of the cutting unit main body in the master transport direction. 15. A movement of the cutter member to a first position facing the transfer path and assisting the transfer of the master, and a second position retracted from the reciprocating space of the cutter member. A movable guide plate which sometimes occupies the second position is provided on the downstream side of the cutting means main body in the master transport direction, and the movable guide plate has a master tip setting position index at the master cutting position. 13. The stencil printing apparatus according to 12.