JP2010173181A - Screen platemaking apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screen platemaking apparatus by which platemaking for a roll master and a frame attaching master can be carried out by one machine. <P>SOLUTION: A frame attachment 21 is inserted and the second frame 14 on which a cutter unit 19 or others is mounted is evacuated downward when platemaking the frame attaching master. The frame attaching master 3 is mounted on the frame attachment and a plate is made by setting the first frame 10, including a thermal head 11, at a predetermined downward position. The frame attachment is removed to move the second frame upward, and the plate is made by sandwiching a master pulled out from a roll between the thermal head of the first frame and a platen roller 7 of a body 4 during the platemaking of the roll master 2. A plate making condition is automatically set by detecting platemaking condition by the outputs of various sensors. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a screen plate making apparatus capable of making both a roll master in which a master is wound in a roll shape and a frame tension master in which a master is stretched on a frame.

  Screen printing is a kind of stencil printing, and uses a screen plate in which a sheet-like plate having an image pattern formed in an opening is stretched and fixed on a frame. When this screen plate is placed close to the substrate, and the printing ink is placed in the frame of the screen plate and squeezed with a squeegee, the ink passes through the opening of the screen and is transferred to the substrate to form an image. The

  Such a screen plate may be prepared by applying a resist to a chemical fiber screen fixed on a frame and forming a necessary image pattern by the steps of exposure and development. It can also be manufactured by a simpler process.

  In the case of the thermal plate making method, for example, a master composed of a porous support and a thermal resin layer can be used. The master thermal resin layer is sandwiched between the thermal head and the platen roller while the master is sandwiched and conveyed by the thermal head. Is selectively heat-sensitive perforated, a plate on which a desired perforated image is formed can be obtained.

  As described above, as a conventional heat-sensitive screen plate-making apparatus for making a master plate, a roll master plate-making apparatus for a roll master, which is a roll-wound master, and a frame tensioner in which a master is previously stretched on a frame. 2. Description of the Related Art A frame master making apparatus for a master is known.

  The roll master plate making apparatus cuts the image to the required length after making the image on the master, and simply stretches the master on the frame with a relatively small tension for printing. In many cases, it is acceptable even if the accuracy is relatively low, such as a monochromatic pattern T-shirt or the like, a three-dimensional object, or the like having a small number of lots.

  On the other hand, in the frame master printing apparatus, the master of the frame master is stretched on the frame in advance with a relatively high tension, and is made in that state, and then used for printing. In many cases, the application target is a color image that requires overprinting, and relatively high printing accuracy is required.

  As described above, since the roll master plate making apparatus and the frame tension master plate making apparatus have slightly different uses, they are conventionally manufactured and used as dedicated machines as described above.

JP 2007-69385 A

  Conventionally, as described above, since the roll master plate making apparatus and the frame master plate making apparatus were each manufactured as dedicated machines, both the roll master and the frame master plate were required in the same office or the like. In this case, it is necessary to prepare both the roll master plate making apparatus and the frame master plate making apparatus, and there is a problem that the burden of capital investment becomes heavy.

  The present invention solves the above-described problems, and an object of the present invention is to provide a screen plate making apparatus that can perform plate making of a roll master and a frame master.

The screen plate-making apparatus according to claim 1 is:
A main body to which one of the thermal head and the platen roller is attached;
The other of the thermal head and the platen roller is provided so as to be movable with respect to the main body so that the master can be sandwiched between the thermal head and the platen roller when set at a predetermined position. An attached first frame;
A detachable roll master which is a roll-shaped master selectively provided in the main body,
A cutter unit for cutting the roll master is attached, and the roll master can be cut by the cutter unit when the roll master provided in the main body is made by the thermal head and the platen roller. A second frame attached to the inside of the main body so as to be movable between a first position and a second position away from the first position;
A detachable frame attachment that is selectively attached to the main body so as to be positioned between the second frame set at the second position and the first frame set at the predetermined position;
It has a configuration in which the master is stretched on a frame body, and has a frame tension master placed on the frame attachment provided on the main body,
It is characterized in that plate making using the roll master and plate making using the frame master can be selected and performed.

The screen plate-making apparatus according to claim 2 is the screen plate-making apparatus according to claim 1,
The screen plate-making apparatus comprises:
A roll master plate making state in which the second frame is in the first position and the roll master is provided in the main body and is capable of plate making; and
A frame master making state where the second frame is in the second position, the frame attachment is provided on the main body, and the frame master is placed on the frame attachment and is capable of plate making. ,
It has a sensor to detect which plate making state,
The master plate-making conditions are set according to the plate-making state of the screen plate-making apparatus detected by the sensor.

The screen plate making apparatus described in claim 3 is the screen plate making apparatus according to claim 2,
As the sensor,
A roll conveyance set sensor for detecting a position of the second frame;
A frame attachment set sensor for detecting whether or not the frame attachment is provided in the main body;
A roll master set sensor for detecting that the master supplied from the roll master exists between the first frame at the predetermined position and the second frame at the first position;
A frame master set sensor for detecting that the frame master is placed at a normal position of a frame attachment provided in the main body;
It is characterized by having.

The screen plate-making apparatus described in claim 4 is the screen plate-making apparatus according to any one of claims 1 to 3,
The first frame is attached to the upper side of the main body so as to be swingable in the vertical direction via a shaft, and a lower position covering the upper side of the main body is set as the predetermined position.
The second frame is attached to the main body so as to be swingable in a vertical direction via a shaft provided at an end portion on the downstream side in the transport direction of the master below the first frame, Urged from the relatively lower second position to the relatively upper first position;
When attaching the frame attachment to the main body, the upstream side of the transport direction of the master is between the first frame that is swung upward and the second frame at the first position. By inserting and locking the front end of the frame attachment to a locking portion in the vicinity of the shaft of the second frame, and then swinging the frame attachment downward about the locking portion. The second frame is pushed down to be set at the second position, and the frame attachment is fixed to the main body by a releasable fixing mechanism provided at a rear end portion of the frame attachment. It is said.

The screen plate making apparatus according to claim 5 is the screen plate making apparatus according to claim 4,
The frame attachment is provided with a removable frame receiving plate having a different thickness corresponding to the frame master having a different thickness of the frame, so that the thickness of the frame of the frame master is different. However, the master is sandwiched between the thermal head and the platen roller in a certain state so that plate making can be performed.

The screen plate-making apparatus according to claim 6 is the screen plate-making apparatus according to claim 4,
A platen roller is attached to the main body,
A thermal head is attached to the first frame, and the first frame is set at a predetermined position on the upstream side of the thermal head in the transport direction of the master and between the thermal head and the platen roller. An assist roller is provided that increases the contact angle with the platen roller by pressing the master from above when the master is sandwiched.

The screen plate making apparatus described in claim 7 is the screen plate making apparatus according to claim 4, wherein:
A holder attached to the main body and rotatably holding the roll master having a normal width dimension;
An adapter that rotatably holds the roll master having a width dimension shorter than a normal width dimension, and is selectively attached to the holder that does not hold the roll master so that the centers in the width direction of the master coincide with each other. When,
It is characterized by having.

The screen plate making apparatus described in claim 8 is the screen plate making apparatus according to claim 4, wherein:
At least one of the holder and the adapter is provided with an elastic body that prevents the slack by pressing the master sent out from the roll master.

  According to the screen plate making apparatus described in claim 1, plate making of a roll master and plate making of a frame master using a frame attachment can be selected and performed. First, when making the roll master, the main body is provided with a roll master, and is fed from the roll master between the second frame set at the first position and the first frame set at the predetermined position. The master is sandwiched between the thermal head and the platen roller so that the master is arranged. Next, a plate-making image is formed on the master by thermal perforation while feeding the master by driving the thermal head and the platen roller. If the master is cut by a cutter unit provided in the second frame after the plate making, a plate-made master having a required size can be obtained. In order to perform printing with this pre-made master, the master may be stretched and fixed on an appropriate frame. Next, when making the master of the frame tension master, the first frame is moved from a predetermined position of the main body, and the second frame is moved to the second position, so that it is between the first frame and the second frame. Attach the frame attachment. A frame master is placed on the frame attachment, the first frame is set at a predetermined position, and the master is sandwiched between the thermal head and the platen roller. Next, a plate-making image is formed on the master by thermal perforation while feeding the frame master by driving the thermal head and the platen roller.

  According to the screen plate-making apparatus described in claim 2, in the effect of the screen plate-making apparatus according to claim 1, whether the screen plate-making apparatus is in a plate-making state of a roll master plate-making state or a frame master-making plate-making state. Since the master plate-making conditions can be set according to the detection result detected by the sensor, switching of the plate-making target in one screen plate-making device and execution of appropriate plate-making under the conditions according to the selected plate-making target It can be reliably performed with a simple operation.

  According to the screen plate making apparatus described in claim 3, in the effect of the screen plate making apparatus according to claim 2, the position of the second frame can be detected by the roll conveyance set sensor, and the frame attachment set sensor Whether or not the frame attachment is provided on the main body can be detected, and the master supplied from the roll master is detected between the first frame at the predetermined position and the second frame at the first position by the roll master set sensor. The frame tension master set sensor can detect that the frame tension master is placed at the normal position of the frame attachment provided on the main body. Therefore, it is possible to reliably detect whether the screen plate-making apparatus is in the plate-making state of the roll master plate-making state or the framed master plate-making state by combining the output signals of a plurality of sensors.

  According to the screen plate making apparatus described in claim 4, in the effect of the screen plate making apparatus according to any one of claims 1 to 3, when performing the plate making of the frame master, the following procedure is performed.・ It can be done by operation. That is, the first frame is swung upward from the predetermined position about the axis, and the upper side of the main body is opened. Next, the frame attachment is inserted from the upstream side in the transport direction of the master between the first frame swung upward and the second frame at the first position. The front end portion of the frame attachment is locked to the locking portion of the main body, and then the frame attachment is swung downward about the locking portion, whereby the second frame is pushed down and set to the second position. In this state, the fixing mechanism provided at the rear end of the frame attachment is locked to the main body to fix the position of the frame attachment, and the second frame at the second position is held at the same position. Here, a frame master is placed on the frame attachment, the first frame is set at a predetermined position, and the master is held between the thermal head and the platen roller. Next, if the thermal head and the platen roller are driven, a plate-making image can be formed on the master by thermal perforation while feeding the frame master.

  Further, when making a roll master from a state in which the frame attachment is attached, it can be performed by the following procedures and operations. That is, the first frame is swung upward from the predetermined position about the axis, and the upper side of the main body is opened. Next, the fixing mechanism of the frame attachment is released, the frame attachment is swung upward about the locking portion, pulled out upstream in the transport direction of the master, and extracted from the main body. Since the second frame is biased upward, it rises when the frame attachment swings upward and is set to the first position. If the master is pulled out from the roll master provided in the main body and placed on the second frame, and the first frame is closed, the roll master can be made.

  In this way, according to the mechanism of the screen plate making apparatus described in claim 4, since the frame attachment can be set in the main body and removed by a simple operation, the plate making of the roll master and the plate making of the frame master are possible. Can be switched in a short time.

  According to the screen plate making apparatus described in claim 5, in the effect of the screen plate making apparatus according to claim 4, when the thickness of the frame body of the frame tension master is different, the thickness corresponding to the thickness of the frame body By providing the frame receiving plate, the master can be sandwiched between the thermal head and the platen roller in a certain state for plate making.

  According to the screen plate making apparatus described in claim 6, in the effect of the screen plate making apparatus according to claim 4, when the first frame is closed and the master is sandwiched between the thermal head and the platen roller, the assist roller is the master plate. Since the contact angle with the platen roller is increased by pressing from above, the conveying force is increased, and the effect of preventing slippage during plate making is obtained. Moreover, it can prevent that parts other than the part of the heat generating body of a thermal head interfere with a master, and damage thermal layers, such as a thermal film.

  According to the screen plate making apparatus described in claim 7, in the effect of the screen plate making apparatus according to claim 4, the roll master having a normal width dimension can be used while being held in the holder, and more than usual. If you want to use a roll master with a short width, remove the roll master from the holder, attach an adapter to the holder, and attach the short roll master to this adapter so that the center in the width direction of the master matches the normal case. In this state, a short roll master can be attached to the main body.

  According to the screen plate making apparatus described in claim 8, in the effect of the screen plate making apparatus according to claim 4, the elastic body provided in the holder and the adapter presses the master fed out from the roll master and gives tension. The sagging is prevented and the previously sent master does not return.

It is a perspective view which shows the roll master set state of the screen plate-making apparatus which concerns on embodiment of this invention. It is sectional drawing which shows the roll master set state of the screen plate-making apparatus which concerns on embodiment of this invention from the front side. It is a perspective view which shows the frame attachment set state of the screen plate-making apparatus which concerns on embodiment of this invention. It is sectional drawing which shows the frame attachment set state of the screen plate-making apparatus which concerns on embodiment of this invention from the front side. It is the perspective view which looked at the frame attachment used with the screen plate-making apparatus which concerns on embodiment of this invention from the upper side. It is the perspective view which looked at the frame attachment used with the screen plate-making apparatus which concerns on embodiment of this invention from the lower side. It is a front view of the frame attachment used with the screen plate-making apparatus which concerns on embodiment of this invention. It is the perspective view which looked at the fixing mechanism (locking state) of the frame attachment used with the screen plate-making apparatus which concerns on embodiment of this invention from the lower side. It is the perspective view which looked at the fixing mechanism (release state) of the frame attachment used with the screen plate-making apparatus which concerns on embodiment of this invention from the lower side. It is a perspective view which shows the frame attachment and frame tension master set state of the screen plate-making apparatus which concern on embodiment of this invention. It is sectional drawing which shows the frame attachment and frame tension master set state of the screen plate-making apparatus which concern on embodiment of this invention from the front side. In the screen plate-making apparatus which concerns on embodiment of this invention, it is a perspective view for demonstrating the sensor which functions at the time of roll master plate-making. In the screen plate-making apparatus which concerns on embodiment of this invention, it is a perspective view for demonstrating the sensor which functions at the time of frame tension master plate-making. In the screen plate-making apparatus which concerns on embodiment of this invention, it is a top view for demonstrating the sensor which detects that a frame tension master exists in a regular position. FIG. 5A is a sectional view viewed from the front side for explaining a sensor for detecting that the frame tension master is in a normal position in the screen plate making apparatus according to the embodiment of the present invention. ) Is an enlarged view of a main part in the partial diagram (a). It is a block block diagram of the screen plate-making apparatus which concerns on embodiment of this invention. It is a control flowchart which shows the effect | action at the time of platemaking of the screen platemaking apparatus which concerns on embodiment of this invention. In the screen plate-making apparatus which concerns on embodiment of this invention, it is a front view which shows the effect | action of the assist roller at the time of plate-making. It is a perspective view which shows the structure and effect | action for performing the setting of the roll master from which width differs in the screen plate-making apparatus which concerns on embodiment of this invention. In the screen plate-making apparatus which concerns on embodiment of this invention, in order to set the roll master from which width differs, it is a perspective view which shows the state which mounts an adapter in the holder for roll masters. In the screen plate-making apparatus which concerns on embodiment of this invention, in order to set the roll master from which width differs, it is a perspective view which shows the state which positions and mounts an adapter in the holder for roll masters. In the screen plate-making apparatus which concerns on embodiment of this invention, in order to set the roll master from which width differs, it is the perspective view which shows the state which mounted and positioned the adapter in the holder for roll masters. In the screen plate-making apparatus which concerns on embodiment of this invention, it is a front view which shows the sagging prevention effect of the master by an elastic body at the time of setting a roll master in a holder.

  The screen plate-making apparatus 1 of the present invention can make both a roll master 2 in which a master is wound in a roll shape and a frame master 3 in which a master is stretched on a frame. In addition, it can be used by easily switching the framed master making state with a simple operation.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to FIGS. The structure and operation of each part will be described separately, but the headings described at the beginning of each part are the parts mainly explained in the relevant part and do not prevent the other parts from being explained. In addition, the figure numbers of the reference drawings added at the beginning of each section are the drawings mainly referred to in the description of the section, and other figures are not prevented from being referred to as necessary.

1. Overall Configuration and Action First, the basic overall configuration of the screen platemaking apparatus 1 according to the present embodiment and switching of the platemaking state will be described with reference to FIGS.
(1) Plate making state switching structure (FIGS. 1 to 4)
As shown in FIGS. 1 and 2, the screen plate-making apparatus 1 of the present embodiment has a main body 4 that is a base body to which each mechanism is assembled. The main body 4 includes a bottom portion 4a, and a front portion 4b and a rear portion 4c that are integrally disposed with a space on the bottom portion 4a. The front panel 4b is provided with an operation panel 5 (also shown in the block diagram of FIG. 16).

  Between the front part 4b and the rear part 4c is a groove part 6 that penetrates left and right along the transport direction of the master (hereinafter simply referred to as the transport direction) and is open upward. The mechanism for making the plate while conveying the sheet is mainly attached to the groove 6. In the present embodiment, the platen roller 7 (upstream in the transport direction) and the transport roller 8 (downstream in the transport direction) are placed between the front portion 4b and the rear portion 4c at a predetermined position in the groove 6 of the main body 4. Is attached. The platen roller 7 and the transport roller 8 are driven by a motor M1 which is a common drive source (the motor M1 is shown in FIG. 16).

  As shown in FIGS. 1 and 2, the shaft is provided in the center of the groove portion 6 of the main body 4 and between the front portion 4 b and the rear portion 4 c, and is provided above the front portion 4 b and the rear portion 4 c. 9, the first frame 10 is attached so as to be swingable in the vertical direction. The first frame 10 is a substantially plate-like member and is also called a pressure plate, and a thermal head 11 is attached to the lower surface of the first frame 10 with the direction orthogonal to the transport direction as the longitudinal direction. The first frame 10 has a predetermined position where the thermal head 11 contacts the platen roller 7 and closes a part of the groove 6, and the thermal head 11 moves away from the platen roller 7 and opens a part of the groove 6. The operator can manually move between the upper open position. If the master is placed on the platen roller 7 of the main body 4 when the first frame 10 is in the open position, and then the first frame 10 is set to a predetermined position, the master is located between the platen roller 7 and the thermal head 11. And can be made by plate making. As the master, as will be described later, both the master fed out from the roll master 2 and the master of the frame master 3 are targeted.

  As shown in FIGS. 1 and 2, the roll master 2 is obtained by winding a long sheet-like or belt-like master into a cylindrical shape. A holder 12 is fixed to the groove 6 of the main body 4 at the end on the upstream side in the transport direction. The position where the holder 12 is fixed is a position slightly lower than the transport roller 8 and the platen roller 7. Although the details of the structure will be described later, the holder 12 is a substantially box-shaped container having an open upper side, and the roll master 2 is rotatably and detachably attached to the holder 12 as necessary. The continuous belt-shaped master fed out from the roll master 2 is disposed on the platen roller 7 and the conveying roller 8 through a master guide shaft 13 described later, and is sandwiched between the first frames 10 set at predetermined positions. Note that the roll master 2 is naturally mounted on the holder 12 in the roll master plate making state, but may be left mounted on the holder 12 even in the frame tension master plate making state.

  As shown in FIG. 2, in the groove 6 of the main body 4, a second frame 14 is attached adjacent to the holder 12 at a position below the first frame 10 and slightly higher than the holder 12. Yes. The overall length of the second frame 14 in the transport direction is shorter than the main body 4. The end of the second frame 14 on the downstream side in the transport direction is pivotally supported via a shaft 15 attached to each inner side (inside the groove 6) of the front part 4b and the rear part 4c. The second frame 14 is urged upward by the spring 18 as the urging means shown in FIGS. 12 and 13, and if no external force is applied, as is apparent from FIGS. The lower surface 16a of the two U-shaped frames 16 spanned between the portion 4b and the rear portion 4c and the upper surface 17a of the notch portion 17 of the second frame 14 are arranged at the uppermost position. It has become. The uppermost position of the second frame 14 is called a first position, and the lowermost position is called a second position. That is, the second frame 14 is constantly urged from the relatively lower second position toward the relatively upper first position.

  As shown in FIGS. 1 and 2, the second frame 14 is fed from the roll master 2 and the master guide shaft 13 for guiding the master fed from the roll master 2 in order from the upstream along the transport direction. A cutter unit 19 that cuts the master and a plate discharge roller 20 that sends the master made downstream are provided. The rotation axes of the master guide shaft 13 and the plate discharge roller 20 and the longitudinal direction of the cutter unit 19 are orthogonal to the transport direction. Although not shown in detail, the cutter unit 19 provided in the second frame 14 is a rotary blade and is rotationally driven by a drive source (not shown). Further, the discharge roller 20 is driven by a motor M2 as a drive source (the motor M2 is shown in FIG. 16).

  As shown in FIGS. 1 and 2, the second frame 14 is set to the upper first position, and the first frame 10 is moved downward from the upper position to the predetermined position as indicated by an arrow in FIG. In this case, the cutter unit 19 of the second frame 14 is adjacent to the thermal head 11 and the platen roller 7 that are in contact with each other, and is disposed on the downstream side thereof.

  Therefore, when the roll master 2 is made by the screen plate making apparatus 1 according to the present embodiment, the master of the roll master 2 is sandwiched between the first frame 10 and the second frame 14 and the roll master 2 is guided by the master guide shaft 13. While making a plate with the thermal head 11 and the platen roller 7, the master after the plate making is cut by the cutter unit 19 and discharged by the plate discharge roller 20.

(2) Frame attachment 21 (FIGS. 3 to 9) used in the state of mastering the frame
As shown in FIGS. 3 and 4, when trying to make the frame master 3 with the screen platemaking apparatus 1 according to the present embodiment, the frame master 3 is attached to the screen platemaking apparatus 1 for plate making. The frame attachment 21 is used. The frame attachment 21 is attached between the first frame 10 and the second frame 14 as necessary in the groove 6 of the main body 4. As will be described later, the frame attachment 21 attached to the main body 4. The frame master 3 is placed on the plate and plate making is performed.

  As shown in FIGS. 5 to 7, the frame attachment 21 has a rectangular frame body 22 as a main body, and the front end portion (downstream in the transport direction) of the frame body 22 is engaged with the locking portion 23 of the main body 4. A locking groove 24 for stopping is provided, and a fixing mechanism 26 connected to a locking pin 25 provided on the main body 4 is provided on the lower surface of the rear end portion (upstream side in the transport direction) of the frame body 22. Yes. As shown in FIGS. 2 and 4, the locking portion 23 locked by the locking groove 24 of the frame attachment 21 is provided on the downstream side of the groove portion 6 of the main body 4 and protrudes into the groove portion 6. The locking pin 25 of the main body 4 to which the fixing mechanism 26 is connected is provided on the upstream side of the groove portion 6 of the main body 4 and protrudes into the groove portion 6 as shown in FIGS. 4 and 11.

  As shown in FIG. 6, the fixing mechanism 26 is provided between the pair of locking plates 27, 27 provided on both sides of the rear end portion of the frame body 22 and the pair of locking plates 27, 27. The rotating shaft 28 includes a pair of locking claws 29 and 29 that are fixed to both ends of the rotating shaft 28 and are disposed in the vicinity of the locking plates 27. At the lower end of the locking plate 27, there is a groove 30 for receiving the locking pin 25 of the main body 4 when the frame attachment 21 is attached, and the lower end of the locking claw 29 is locked to the locking pin 25 that has entered the groove 30. It is like that. The rotation shaft 28 of the locking claw 29 is interlocked with a handle 31 for release operation via an interlocking mechanism 33. An operation hole 32 is provided at the rear end of the frame body 22, and the handle 31 can be operated from the upper side if a hand is put into the operation hole 32 from the upper side of the frame attachment 21. An urging means 34 such as a spring is interlocked with the handle 31 and plays a role of preventing play (backlash) of the handle 31. The rotating shaft 28 to which the locking claw 29 is attached receives a force that rotates in a predetermined direction. Accordingly, the locking claw 29 is always urged by a biasing means (not shown) so as to come to a position where the locking pin 25 locked in the groove 30 of the locking plate 27 is fixed. 6, 7, and 8 are views showing a state in which the fixing mechanism 26 is locked to the locking pin 25, and FIG. 9 is a diagram in which the handle 31 is operated rightward in FIG. It is a figure which shows the state from which the latching claw 29 left | separated from the groove | channel, and the connection of the fixing mechanism 26 with respect to the latching pin 25 of the main body 4 was cancelled | released.

  As shown in FIG. 5, a frame receiving plate 35 is provided on the upper surface of the frame body 22 of the frame attachment 21 as necessary. The frame receiving plate 35 is detachably attached to the frame body 22 by a sheet-like magnet, and the height of the mounting surface is set according to the thickness of the frame tensioning master 3 mounted on the frame attachment 21. To be adjusted. That is, as shown in FIGS. 10 and 11, the frame tension master 3 has a configuration in which the master S is stretched on the upper surface side of the rectangular frame 36, and the frame of the frame attachment 21 with the master S facing up. It is placed on the body 22. Accordingly, when the thickness of the frame body 36 of the frame master 3 is different, the thermal head 11 whose position is fixed with respect to the main body 4 when the frame master 3 is placed on the frame attachment 21. The positional relationship between the platen roller 7 and the master S is not constant. For this reason, it is necessary to adjust the height of the frame tension master 3 on the frame attachment 21, and the frame receiving plate 35 may be required depending on the thickness (height) of the frame body 36 of the frame tension master 3. is there. In this way, by providing an appropriate number of frame receiving plates 35 corresponding to the frame masters 3 having different thicknesses of the frame body 36 on the frame attachment 21 as necessary, the frame masters are provided. Even if the thickness of the third frame 36 is different, the master can be sandwiched between the thermal head 11 and the platen roller 7 in a certain state for plate making.

(3) Switching or setting of the plate-making state (FIGS. 1 to 4, 10, and 11)
In the configuration described above, an operation or action when the screen platemaking apparatus 1 is set to the roll master platemaking state and an operation or action when the screen platemaking apparatus 1 is set to the frame master printing state will be described.

  When setting the screen plate-making apparatus 1 to the roll master plate-making state, as shown in FIGS. 1 and 2, the first frame 10 is opened and the second frame 14 is set to the upper first position. The continuous belt-shaped master S is pulled out from the roll master 2 of the holder 12 and is disposed on the second frame 14 on which the master guide shaft 13 and the cutter unit 19 (rotating blade) are mounted and the platen roller 7. Then, the first frame 10 is set to a predetermined position (closed) and the master S is sandwiched. Here, if the thermal head 11 and the platen roller 7 are driven, the master S can be made.

  When the screen plate-making apparatus 1 is set to the framed master plate-making state, the first frame 10 is first opened as shown in FIGS. 3 and 4 and FIGS. 10 and 11. Then, in the groove portion 6 of the main body 4, the frame attachment 21 is inserted from the upstream side in the transport direction between the opened first frame 10 and the second frame 14 in the first position. As described above, the locking portion 23 is provided on the front side of the shaft 15, which is the center where the second frame 14 swings. The locking portion 23 has a locking groove at the distal end portion of the frame attachment 21. 24 is locked, and then the frame attachment 21 is swung downward about the locking portion 23. As shown in FIG. 4, the frame attachment 21 swinging downward hits a roller 37 provided on the second frame 14 to push down the second frame 14 and set the second frame 14 at the second lower position. At the same time when the second frame 14 is set to the second position, the fixing mechanism 26 of the frame attachment 21 is connected to the locking pin 25 of the main body 4 to fix the position of the frame attachment 21. As a result, the second frame 14 having the cutter unit 19 and the master guide shaft 13 unnecessary for making the frame master 3 is retracted downward, and the frame attachment 21 is set on the platen roller 7 and the transport roller 8.

  As shown in FIGS. 10 and 11, the frame master 3 is installed on the frame attachment 21 attached to the main body 4 with the master S facing upward. Then, the first frame 10 is set to a predetermined position (closed) and the master S is sandwiched. Here, if the thermal head 11 and the platen roller 7 are driven, the master of the frame tension master 3 can be made.

  In order to remove the frame attachment 21 from the main body 4, the first frame 10 is opened, and the handle 31 is manually operated from the operation hole 32 of the frame body 22 of the frame attachment 21. As a result, the locking claw 29 engaged with the locking pin 25 of the main body 4 is released, so that the second frame 14 is returned to the upper first position by the biasing force. Therefore, if the frame attachment 21 is lifted while holding the handle 31, and pulled upstream while rotating around the locking portion 23, the frame attachment 21 can be easily removed from the main body 4 with little force without resistance. be able to.

2. Sensor for detecting plate making state (FIGS. 12 to 15)
The screen plate-making apparatus 1 of this embodiment has a plurality of sensors in order to detect whether the screen plate-making apparatus 1 is in a roll master plate-making state or a framed master plate-making state. Then, the CPU 40 (shown in FIG. 16), which is the control means of the screen plate-making apparatus 1, determines the plate-making state based on the combination of detection signals (ON, OFF) of each sensor, and changes to the plate-making state corresponding to the determination result. It is possible to perform plate making by automatically setting the most suitable master plate making conditions.

12 to 15 mainly show the installation positions of the sensors. 12 and 13 show the case where the outer case (decorative cover) is removed from the main body 4 to expose the internal mechanism.
As shown in FIG. 12, the roll conveyance set sensor 41 is provided at the upper part of the second frame 14 or the front part 4b of the main body 4, and can be constituted by, for example, a mechanical limit switch. The roll conveyance set sensor 41 operates as the second frame 14 moves in the vertical direction. When the second frame 14 is in the first position (upper position), an ON signal is output, and the second frame 14 When it is in the 2 position (lower position), an OFF signal is output.

  As shown in FIGS. 12 and 14, the frame attachment set sensor 42 is provided on the inner surface side of the rear portion 4 c of the main body 4 and can be constituted by, for example, a mechanical limit switch. The frame attachment set sensor 42 operates when the frame attachment 21 is mounted on the main body 4, and outputs an ON signal when the frame attachment 21 is provided on the main body 4, and the frame attachment 21 is not provided on the main body 4. In this case, an OFF signal is output.

  As shown in FIG. 12, the roll master set sensor 43 is provided on the second frame 14 and can be constituted by, for example, a light reflection type sensor having a light projecting unit and a light receiving unit. The roll master set sensor 43 outputs an ON signal when the master S fed out from the roll master 2 is set between the first frame 10 at the predetermined position and the second frame 14 at the first position. To do. In this case, the roll master set sensor 43 outputs the ON signal when the light from the light projecting means is reflected by the master S and returned by the light receiving means. In other cases, an OFF signal is output.

  The master standby sensors 53 and 53a shown in FIGS. 12 to 14 perform master tip position detection during roll master plate making and master presence / absence detection during framed master plate making. As shown in FIGS. 12 and 13, the master standby sensor 53 is provided in the first frame 10 and can be constituted by a light reflection type sensor having a light projecting unit and a light receiving unit, for example. In this case, a master standby sensor 53a, which is a reflection member, is provided above the cover of the transport roller 8 fixed to the main body 4. When the master S or the frame master S fed out from the roll master 2 is set between the first frame 10 at a predetermined position and the transport roller 8 fixed to the main body 4, the master standby sensor 53 The light reflection is blocked and the presence of the master is judged.

  As shown in FIGS. 13 to 15, the frame tension master set sensor 44 is provided on the downstream side of the conveying roller 8 provided in the main body 4, and can be constituted by, for example, a mechanical limit switch. More specifically, as shown in FIGS. 14 and 15, the frame tension master set sensor 44 is provided on the downstream end face of the cover 8a of the transport roller 8, and the width direction of the master S (perpendicular to the transport direction). Are arranged as a set at a predetermined interval with respect to each other. As shown in FIG. 15, the frame master 3 is placed at a normal position on the frame attachment 21 attached to the main body 4, and the inner end surface of the frame 36 on the downstream side of the frame master 3 has two pieces. When the frame master set sensor 44 is actuated, an ON signal is output assuming that the frame master 3 is set at a normal position where it can be conveyed without skew.

  As shown in FIGS. 13, 14, and 18, the frame conveyance limit sensor 54 and the frame conveyance limit sensor detection unit 54 a are provided on the upstream side of the platen roller 7 provided in the main body 4. Can be configured with limit switches. More specifically, as shown in FIGS. 13 and 14, the frame conveyance limit sensor detection unit 54 a is provided on the upstream end surface of the cover of the platen roller 7, and the width direction of the master S (perpendicular to the conveyance direction). Are arranged as a set at a predetermined interval with respect to each other. The frame conveyance limit sensor 54 is configured such that the frame conveyance limit sensor 54 operates when any one of the two is pressed. The normal frame master master plate making operation stops after the plate making with the desired plate making data is completed, but if the plate making area exceeds the plate making possible area due to operation failure, etc., it will not load the machine. Finish with the method described below. That is, when the inner end surface of the upstream frame body of the frame master 3 activates the frame conveyance limit sensor detector 54a during the plate making operation, an OFF signal is transmitted as if the frame master was conveyed to the frame conveyance limit position. Then, the plate making operation is terminated, and the frame is prevented from colliding with the cover of the platen roller 7.

  As shown in FIG. 16, a pressure plate set sensor 45 that detects that the first frame 10 is set at a predetermined position is provided in the main body 4. The pressure plate set sensor 45 can be constituted by a mechanical limit switch, for example, and outputs an ON signal when the first frame 10 is closed.

3. Detection of plate making state and plate making control (FIGS. 16 and 17)
Plate making control including detection of the plate making state in the screen plate making apparatus 1 of the present embodiment will be described with reference to FIGS.
As shown in FIG. 16, the screen plate-making apparatus 1 of this embodiment has a CPU 40 as a control means. The CPU 40 includes the roll conveyance set sensor 41, the frame attachment set sensor 42, the roll master set sensor 43, the frame tension master set sensor 44, the pressure plate set sensor 45, the master standby sensor 53, the frame conveyance limit, and the like. A plate-making state can be detected by receiving a signal from the sensor 54. The CPU 40 receives an instruction signal from the operation panel 5, and under the plate making conditions suitable for the detected plate making state, the driver 46 that drives the thermal head 11, and the motor that drives the platen roller 7 and the conveying roller 8. Each part necessary for plate making including the driver 47 of M1 and the driver 48 of the motor M2 that drives the plate discharge roller 20 and the like can be integratedly controlled, and the master S can be made. The CPU 40 can display the input instruction content, the current control status, and other necessary information on the display 49 (also shown in FIG. 3).

The contents of the plate making control by the CPU 40 described above will be described with reference to FIG.
When the judgment of the plate-making state and the plate-making control are started (S0), first, the pressure plate (first frame 10) is set, the pressure plate set sensor 45 is at a predetermined position (S1, ON), and the state of the roll conveyance set sensor 41 is judged. (S2) When the second frame 14 is in the first position (upper position) and outputs an ON signal, the state of the frame attachment set sensor 42 is next determined (S3). If the frame attachment set sensor 42 is ON, the frame attachment 21 is detected in an irregular state even though the second frame 14 is in the first position (upper position). It is judged (S4). If the frame attachment set sensor 42 is OFF in S3, the second frame 14 is in the first position (upper position) (S2, ON) and the frame attachment 21 is not present. Judgment is made (S5).

  When it is confirmed by the roll master set sensor 43 that the master S is set (S6, ON), the positioning of the leading edge of the master is automatically performed, and the preparation of the roll master is completed (S7). A master standby sensor 53 detects the master tip position. Next, plate making conditions suitable for the roll master plate making state are set (S8), and by sending plate making data, the thermal head 11 and the motors M1 and M2 are driven to execute plate making based on the desired plate making data (S9). ), The plate making control in the roll master plate making is finished (S10). Note that the master cut length, the plate making start position with respect to the master, and the like can be freely changed by operating the operation panel 5.

  When the state of the roll conveyance set sensor 41 is determined (S2) and the second frame 14 is in the second position (lower position) and an OFF signal is output, the state of the frame attachment set sensor 42 is next. It is judged (S11). If the frame attachment set sensor 42 is OFF, the frame attachment 21 is not detected even though the second frame 14 is in the second position (lower position). It is determined that there is an error, not the master plate-making state (S12). If the frame attachment set sensor 42 is ON in S11, the second frame 14 is in the second position (lower position) (S2, OFF), and the frame attachment 21 is mounted. The state is determined (S13).

  Next, the state of the frame master set sensor 44 and the state of the frame master presence / absence sensor (master standby sensor 53) are determined, and the frame master 3 is set at a predetermined position on the frame attachment 21 (S14, ON) and the presence of a master in the plate making frame (S15, ON), the plate making conditions suitable for the frame mastering plate making state are set (S16), and the thermal head 11 and the motor are sent by sending the plate making data. M1 is driven to execute the plate making based on the desired plate making data (S9), and the plate making control in the frame master printing is finished (S10). The plate making start position with respect to the master can be freely changed by operating the operation panel 5.

  In the above control, the platemaking conditions suitable for the roll master platemaking state and the platemaking conditions suitable for the framed master platemaking state are the types of masters used in each platemaking state and the framed master 3. For example, it can be appropriately determined according to conditions such as the tension of the master S stretched on the frame 36.

4). About the assist roller (Fig. 18)
FIG. 18 is an enlarged view of the lower part on the upstream side of the first frame 10 from the front side, and the thermal head 11 is attached to this portion of the first frame 10. The thermal head 11 includes a flat surface 50 that sandwiches the master S with the platen roller 7. Although not shown in detail, a large number of heating elements are arranged on the flat surface 50 at right angles to the transport direction.

  A portion other than the flat surface 50 of the thermal head 11 has a convex portion 51 having an outer shape protruding from the flat surface 50 for structural reasons. For this reason, the thermal head 11 is attached to the first frame 10 so that the convex portion 51 is disposed on the upstream side as shown in the figure and is slightly inclined with respect to the transport direction for two reasons described below. Yes. That is, by attaching in such an inclined manner, first, since the convex portion 51 on the upstream side is positioned above, it is difficult to contact the master S on the upstream side, and it is difficult to damage the master S. Secondly, in the plate making state in which the first frame 10 is set at a predetermined position, the tensioned frame tension master S strongly pushes up the convex portion 51 to lift the thermal head 11 and the necessary plate making pressure cannot be obtained. Is prevented.

  As shown in FIG. 18, in the present embodiment, an assist roller 52 is provided on the first frame 10 upstream of the thermal head 11. The assist roller 52 is a roller having a rotation axis parallel to the transport direction. In the plate-making state as shown in FIG. 18, the assist roller 52 can push the master S downward so that the master S does not contact the convex portion 51 of the thermal head 11 upstream of the thermal head 11 and the platen roller 7. Is arranged. Further, because of such an arrangement, the assist roller 52 can press the master S from above in the plate-making state to increase the contact angle with the platen roller 7.

  Such an action by the assist roller 52 is particularly effective in the case of the frame master 3. As described above, since the master S is stretched with a considerable tension on the frame body 36 as described above, the frame tension master 3 is not easily deformed even if it is pressed, and the thermal head 11 is simply tilted and attached as described above. Although it may be insufficient, if the master roller S is further pressed downward by the assist roller 52, the above-described objects and effects can be achieved more reliably.

5). Set of roll master 2 (FIGS. 19 to 23)
As described above, when the roll master 2 is used in the screen plate making apparatus 1 of the present embodiment, the roll master 2 is attached to the holder 12 fixed to the main body 4 as shown in FIGS. 19 (a) and 19 (b). Attach the to rotate freely. The roll master 2 is a wide master having a width suitable for the size of the apparatus, but in some cases, a standard master having a small width may be used. In such a case, as shown in FIGS. 19C and 19D, an adapter 55 is attached to the holder 12, and a narrow standard master is rotatably attached to the adapter 55 for use.

  As shown in FIGS. 20 and 21, the adapter 55 is a box-shaped container having the same shape and structure as the holder 12. As shown in FIG. 20, a magnet sheet 56 serving as attachment means is attached to the lower surface of the adapter 55. As shown in FIG. 21, a pair of positioning claws 57, 57 are provided to protrude at both corners of the adapter 55, and a pair of positioning claws 57, 57 are placed on the bottom surface of the holder 12 at positions corresponding to the pair of positioning claws 57, 57. Positioning holes 58, 58 are formed. As shown in FIG. 21, if the positioning claw 57 of the adapter 55 is inserted into the positioning hole 58 of the holder 12 and the adapter 55 is attached to the holder 12, the center line in the width direction of the holder 12 and the adapter 55 is shown in FIG. Match. That is, the center line in the width direction of the standard master roll attached to the adapter 55 can be matched with the center line of the plate making unit of the apparatus.

  As shown in FIGS. 19A and 19C, FIG. 20, FIG. 22, and FIG. 23, the bottom plate of the holder 12 and the adapter 55 holds the master S sent from the roll master 2 to prevent sagging. 60 is provided. The elastic body 60 is made of a mylar sheet or the like. As shown in FIG. 23, the continuous belt-shaped master S fed out from the roll master 2 accommodated in the holder 12 comes into contact with the elastic body 60 to deform it, and is wound around the master guide shaft 13 to be thermal head 11. Conveyed to the side. Since the deformed elastic body 60 holds the master S, it prevents the master S from sagging and returning to the direction opposite to the transport direction.

6). Advantages of the present embodiment As described above, according to the screen plate-making apparatus 1 of the present embodiment, a roll master plate-making state and a frame-stretching master plate-making state using the frame attachment 21 can be arbitrarily selected for simple operation. Can be switched easily. In particular, the attachment of the frame attachment 21 is convenient because it can be reliably performed by a simple operation of simply opening the first frame 10 and inserting the frame attachment 21 into the main body 4 and pushing it down. In addition, the plate-making state selected in this way is automatically detected by a combination of signals from multiple sensors, and the plate-making conditions are automatically set according to the set plate-making state. Is also good, and it is also possible to obtain an effect that plate-making failure is less likely to occur due to a mistake in setting plate-making conditions.

DESCRIPTION OF SYMBOLS 1 ... Screen plate-making apparatus 2 ... Roll master 3 ... Frame master 4 ... Main body 7 ... Platen roller 9 ... First frame axis 10 ... First frame 11 ... Thermal head 12 ... Roll master holder 14 ... Second frame 15 ... Shaft center of second frame 19 ... Cutter unit 21 ... Frame attachment 23 ... Locking portion of frame attachment 26 ... Fixing mechanism of frame attachment 35 ... Frame receiving plate 36 ... Frame body of frame tension master 40 ... Control means CPU as
DESCRIPTION OF SYMBOLS 41 ... Roll conveyance set sensor 42 ... Frame attachment set sensor 43 ... Roll master set sensor 44 ... Frame tension master set sensor 45 ... Pressure plate set sensor 52 ... Assist roller 55 ... Adapter 60 ... Elastic body

Claims (8)

A main body to which one of the thermal head and the platen roller is attached;
The other of the thermal head and the platen roller is provided so as to be movable with respect to the main body so that the master can be sandwiched between the thermal head and the platen roller when set at a predetermined position. An attached first frame;
A detachable roll master which is a roll-shaped master selectively provided in the main body,
A cutter unit for cutting the roll master is attached, and the roll master can be cut by the cutter unit when the roll master provided in the main body is made by the thermal head and the platen roller. A second frame attached to the inside of the main body so as to be movable between a first position and a second position away from the first position;
A detachable frame attachment that is selectively attached to the main body so as to be positioned between the second frame set at the second position and the first frame set at the predetermined position;
It has a configuration in which the master is stretched on a frame body, and has a frame tension master placed on the frame attachment provided on the main body,
A screen plate making apparatus, wherein plate making using the roll master and plate making using the frame master can be selected and performed. The screen plate-making apparatus comprises:
A roll master plate making state in which the second frame is in the first position and the roll master is provided in the main body and is capable of plate making; and
A frame master making state where the second frame is in the second position, the frame attachment is provided on the main body, and the frame master is placed on the frame attachment and is capable of plate making. ,
It has a sensor to detect which plate making state,
2. The screen plate making apparatus according to claim 1, wherein the master plate making conditions are set according to the plate making state of the screen plate making apparatus detected by the sensor. As the sensor,
A roll conveyance set sensor for detecting a position of the second frame;
A frame attachment set sensor for detecting whether or not the frame attachment is provided in the main body;
A roll master set sensor for detecting that the master supplied from the roll master exists between the first frame at the predetermined position and the second frame at the first position;
A frame master set sensor for detecting that the frame master is placed at a normal position of a frame attachment provided in the main body;
The screen plate-making apparatus according to claim 2, comprising: The first frame is attached to the upper side of the main body so as to be swingable in the vertical direction via a shaft, and a lower position covering the upper side of the main body is set as the predetermined position.
The second frame is attached to the main body so as to be swingable in a vertical direction via a shaft provided at an end portion on the downstream side in the transport direction of the master below the first frame, Urged from the relatively lower second position to the relatively upper first position,
When attaching the frame attachment to the main body, the upstream side of the transport direction of the master is between the first frame that is swung upward and the second frame at the first position. By inserting and locking the front end of the frame attachment to a locking portion in the vicinity of the shaft of the second frame, and then swinging the frame attachment downward about the locking portion. The second frame is pushed down to be set at the second position, and the frame attachment is fixed to the main body by a releasable fixing mechanism provided at a rear end portion of the frame attachment. The screen plate making apparatus according to any one of claims 1 to 3. The frame attachment is provided with a removable frame receiving plate having a different thickness corresponding to the frame master having a different thickness of the frame, so that the thickness of the frame of the frame master is different. 5. The screen plate making apparatus according to claim 4, wherein the master is sandwiched between the thermal head and the platen roller in a certain state so that plate making can be performed. A platen roller is attached to the main body,
A thermal head is attached to the first frame, and the first frame is set at a predetermined position on the upstream side of the thermal head in the transport direction of the master and between the thermal head and the platen roller. 5. The screen plate-making apparatus according to claim 4, further comprising an assist roller that presses the master from above when the master is sandwiched to increase a contact angle with the platen roller. A holder attached to the main body and rotatably holding the roll master having a normal width dimension;
An adapter that rotatably holds the roll master having a width dimension shorter than a normal width dimension, and is selectively attached to the holder that does not hold the roll master so that the centers in the width direction of the master coincide with each other. When,
The screen plate-making apparatus according to claim 4, comprising: The screen plate-making apparatus according to claim 4, wherein at least one of the holder and the adapter is provided with an elastic body that holds the master fed from the roll master and prevents sagging.