JP2002086881A - Case unit for printing drum - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a case unit, by which a user can surely know the ink color of a printing drum kept in a drum case without opening or closing the drum case. SOLUTION: This case unit 1 for a printing drum has a drum case 2 for keeping the printing drum 21 therein, an ink color detecting means 13 for detecting the ink color of the printing drum kept within the drum case 2 and a displaying means 4, the displaying surface 4A of which is arranged so as to face to the outside of the drum case 2 and which displays at least the ink color detected by the ink color detecting means 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a unit having a drum case for storing a printing drum.

[0002]

2. Description of the Related Art A printing drum used in a stencil printing machine supplies ink from the inside of the drum to the outer peripheral surface of the drum. Therefore, one printing drum generally uses one color of ink. For this reason, when printing is performed with ink of a different color, the printing drum must be replaced with a printing drum having a different color of ink. Therefore, the printing drum is configured to be detachable from the stencil printing apparatus. The printing drum detached from the stencil printing apparatus is stored in a dedicated drum case in order to prevent drying of ink and adhesion of dust. A seal of the same color as the ink color of the printing drum housed inside is attached to the drum case, so that the ink color can be recognized from the outside of the case.

[0003]

Conventionally, the printing drum is housed and stored in a drum case to which a sticker of the same color as the ink color has been pasted. There was a misplacement, and the drum case had to be opened and closed sequentially to confirm that the printing drum had the desired ink color, which was troublesome.

If the printing drum is left for a long time after printing, the water contained in the ink evaporates gradually, and the ink is softened (loose). The softening of the ink is different between the case where the printing drum is stored in the drum case and the case where the printing drum is left attached to the stencil printing apparatus. This is because there is little fluctuation in environmental conditions such as temperature and humidity inside the drum case,
The amount of evaporation is small because of the inside of the drum case, but the inside of the stencil printing machine is subject to large changes in environmental conditions such as temperature and humidity before and after the use of the machine, and the amount of evaporation into the stencil printing machine is large. is there. For this reason, even when the printing drum stored in the drum case and the printing drum attached to the stencil printing apparatus show the same idle time, the amount of ink transferred from the printing drum to the paper during printing is limited to the drum case. The print drum stored in the stencil printing machine differs greatly from the print drum stored in the stencil printing apparatus, and a print image becomes uneven.

An object of the present invention is to provide a case unit that can reliably inform a user of the ink color of a printing drum stored in a drum case without opening and closing the drum case. A further object of the present invention is to provide a case unit that can suppress the occurrence of unevenness in a printed image due to the storage state by correcting the leaving time in consideration of the storage state of the ink.

[0006]

According to a first aspect of the present invention, there is provided a unit having a drum case for storing a printing drum for detecting an ink color of a printing drum stored in the drum case. And a display means arranged at least outside the drum case with the display surface facing and displaying at least the ink color detected by the ink color detection means. According to the first aspect of the present invention, when the printing drum is stored inside the drum case, the ink color is detected by the ink color detecting means, and the detected ink color is displayed on the display means.

According to a second aspect of the present invention, in the printing drum case unit of the first aspect, a detecting means for detecting whether or not the stored printing drum has a measuring means for measuring the idle time; When the detecting means detects that the printing drum includes the measuring means, the correcting means subtracts and corrects the measuring time of the measuring means. According to the second aspect of the invention, when the printing drum provided with the measuring means is stored in the drum case, the measuring time by the measuring means is subtracted and corrected by the correcting means, so that the measurement measured in the drum case is performed. The time is later than the measurement time measured outside the drum case.

According to a third aspect of the present invention, in the case unit for a printing drum according to the first aspect, there is provided a connection terminal exposed to the outside of the drum case and capable of exchanging data with a connected device. It is characterized by. According to the third aspect of the invention, communication of various data detected in the drum case and various data from a device connected to the connection terminal is performed between the drum case and the device.

According to a fourth aspect of the present invention, in the case unit for a printing drum according to the third aspect, the connection terminals are arranged on the upper surface and the lower surface of the drum case, respectively. The connection terminals on the lower surface are provided so as to be connectable to each other. According to the fourth aspect of the present invention, when the drum cases are stacked, the connection terminals of each case are connected, and data communication between the cases can be performed.

According to a fifth aspect of the present invention, in the printing drum case unit according to the third aspect, a device connected to the connection terminal is a stencil printing apparatus capable of selecting an ink color.
A control unit for comparing the ink color information selected by the stencil printing apparatus with the ink color information detected by the ink color detecting means, and displaying the selected ink color on a display device when both match. Features. According to the fifth aspect of the invention, when the printing drum of the ink color selected by the stencil printing apparatus is stored, the selected ink color is displayed on the display means of the drum case storing the drum.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Several embodiments of the present invention will be described. In each embodiment, the same components are denoted by the same reference numerals as those used in the first embodiment, and overlapping description will be omitted. And (1st Embodiment).

The print drum case unit 1 shown in FIGS. 1 and 2 includes a drum case 2 and a case set table 10 functioning as an interface for setting the drum case 2. The drum case 2 includes a lid 2A and a case main body 2B, and the lid 2A is supported on the case main body 2B by a hinge 8 shown in FIG. The lid 2A is provided with the display surface 4A facing the outside of the case, and is provided with a display unit 4 such as a liquid crystal display device and a lamp 3 as display means for displaying at least the ink color. A lock member 7 for holding the lid 2A in a closed state is provided on a side surface of the case 2 facing the hinge 8. A handle 6 for hanging the case 2 is provided at the center of the lid 2A.

The upper surface 2a of the lid 2A and the lower surface 2b of the main body 2B, which are the upper and lower surfaces of the drum case 2, are partially exposed to the outside of the case to exchange data with connected equipment. A lid-side connector 5 and a case-side connector 9 are provided as possible connection terminals. The case-side connector 9 is provided so as to be connectable to a base connector 11 as a connection terminal provided on the case set table 10, and is configured to be able to exchange data with the base connector 11. The lid-side connector 5 and the case-side connector 9 are provided so that the lid-side connector 5 and the case-side connector 9 can be connected when the drum case 2 is stacked.

As shown in FIG. 3, the drum case 2 is a case for storing the printing drum 21 in the inside 2C of the case. The stored printing drum 21 is supported rotatably in both forward and reverse directions by a shaft 22 which extends downward from the slide frame 23 and is supported by a pair of side plates 24 arranged in the axial direction of the printing drum 21. The shaft 22 is hollow and has a plurality of ink supply holes (not shown) formed in the axial direction thereof. On one side plate 24, an ink supply means 20 is provided. The ink supply means 20 includes:
An ink pack 26 containing printing ink, an ink pump 27 and a pump motor 28 for extracting ink from the ink pack 26, and a connecting pipe 29 forming an ink flow path connecting the ink pump 27 and the shaft 22 are provided. . On one side plate 24, a measurement timer 32 is mounted as a measuring means for measuring the idle time of the stored printing drum 21.

In the inside 2C of the case, a contact switch 33 as a detecting means for detecting whether or not the stored printing drum 21 has a measurement timer 32, and a printing drum stored as shown in FIG. Ink color detection sensor 13 as ink color detection means for detecting 21 ink colors
And a support member 12 for holding the printing drum 21. The support member 12 is for mounting the lower ends of the pair of side plates 24 as shown in FIG.
One is provided in each of one axial direction. The contact switch 33 is connected to the side plate 2 on which the measurement timer 32 is mounted.
The support member 12 on the fourth side is provided.

As shown in FIGS. 5 and 6, the ink color detection sensor 13 is a button switch having a plurality of push buttons 14, 15, 16, 17 mounted on the inner wall 2D of the case body 2B. Is turned on when is pressed. In the present embodiment, four push buttons are provided, but the number of button switches is not limited to four.

When the printing drum 21 is housed in the case 2, a push button 14 is provided on the side plate 24 facing the inner wall 2D.
Openings 34, 35, and 3 for arbitrarily storing １７17.
6, 37 are formed. Opening 34 is push button 1
4, the opening 35 is arranged to accommodate the push button 15, the opening 36 is arranged to accommodate the push button 16, and the opening 37 is arranged to accommodate the push button 17, respectively. Each push button is accommodated in each opening. In this state, each push button is not pressed by the outer surface 24a of the side plate 24. In this embodiment, the opening 37 corresponding to the push button 17 is not formed. Each opening is formed in the side plate 24 such that the position and number of the openings are different depending on the ink color. In this embodiment, the push button 14 is pressed by the side plate of the print drum having yellow ink, and the push button 15 is pressed by the side plate of the print drum having magenta ink. The push button 16 is pressed by the side plate of the printing drum having cyan ink, and the push button 17 is pressed by the side plate of the printing drum having black ink. 5 and 6, the printing drum 21 is a printing drum having black ink.

As shown in FIGS. 2 and 3, the case set table 10 is provided with a base connector 11, a controller 30 as control means, and a main body connection connector 37. The main part of the controller 30 is composed of a well-known microcomputer. In the present embodiment, the lamp 3 and the display unit 4 are controlled based on data communication performed between the connectors and the detection result of the ink color detection sensor 13.
And a correction means for subtracting and correcting the time measured by the measurement timer 32 when the contact switch 33 detects that the printing drum 21 has the measurement timer 32. This correction means may be a mathematical expression for subtracting an arbitrary time from the value measured by the measurement timer 32, or may be a data table in which a value previously subtracted for each measurement time is mapped. These formulas and correction tables are stored in the storage unit of the controller 30. The correction data used for the correction table is obtained by an experiment or the like, and is stored in a storage unit or the like of the controller 30.

As shown in FIG. 4, the controller 30 includes a base connector 11, a body connection connector 37,
Power supply 31 is connected. The lamp 3, the display unit 4, the lid-side connector 5, and the ink color detection sensor 13 are connected to the case-side connector 9. Measurement timer 32
Is connected to the case-side connector 9 via the contact switch 33. That is, the case set table 10 and the drum case 2 are connected to the base connector 11 and the case-side connector 9.
And connected. When both are connected, the current supplied from the power supply 31 is supplied to the drum case 2 side.

The ink color display processing and the measurement means correction processing by the printing drum case unit 1 having such a configuration will be described with reference to the flowcharts shown in FIGS. In step 100 of the flowchart shown in FIG.
It is determined whether any of the push buttons 14 to 17 of the ink color detection sensor 13 has been pressed and turned on. If the ink color detection sensor 13 is ON, the process proceeds to step 101, where the lamp 3 of the drum case 2 is turned on assuming that the printing drum 21 is housed in the drum case 2, and the process proceeds to step 10.
In step 2, the detected ink color is displayed on the display unit 4 and the process is completed.

In step 100, if the ink color detection sensor 13 is not turned on, for example, if the stored printing drum 21 is taken out, step 103
Then, the lamp 3 of the drum case 2 is turned off, and the routine proceeds to step 104, where "no drum" is displayed on the display unit 4, and this processing is completed.

When the print drum 21 is stored in the drum case 2 as described above, the lamp 3 is turned on while the ink color of the stored print drum is displayed on the display unit 4, and the print drum 21 is stored. Otherwise, the lamp 3 is turned off and the display unit 4 displays "no drum", so that the user can be notified of the ink color and the presence or absence of the printing drum 21 without opening and closing the drum case 2 one by one.

Step 11 of the flowchart shown in FIG.
In the case of 0, it is determined whether or not the printing drum 21 stored in the drum case 2 includes a measuring unit, that is, a measuring timer 32. Here, the presence or absence of the measurement timer 32 is determined based on whether or not the contact switch 33 is turned on. The contact switch 33 is turned on and the printing drum 21 is set to the measurement timer 3
If the measurement timer 32 is not provided, the process proceeds to step 111 and the processing is terminated by subtracting and correcting the measurement time of the measurement timer 32 by the correction means. If the measurement timer 32 is not provided, the measurement time is not corrected and terminated. I do.

As described above, when the printing drum 21 having the measurement timer 32 is stored in the drum case 2, the measurement time of the measurement timer 32 is subtracted and corrected.
A difference can be made between the time left inside the drum case 2 and the time left outside the case. For this reason, the printing drum 2
The standing time corresponding to the storage state of No. 1 can be measured, and the occurrence of unevenness in the printed image due to the storage state can be suppressed.

FIGS. 9 and 10 show the ink color detection sensor 13.
The figure shows a form in which the arrangement location of is changed. In FIG. 9, the ink color detection sensor 13 is mounted on the inner wall 2E on the near side of the case body 2B. Each push button 14-1
Numeral 7 is provided in a positional relationship facing the ink pack 26 when stored in the drum case 2. In the ink pack 26, a plurality of openings for accommodating the push buttons 14 to 17 are arbitrarily provided.

The opening 44 is provided with the push button 14 and the opening 4
5 is arranged to accommodate the push button 15, and the opening 46 is arranged to accommodate the push button 16. Each push button is used to hold the ink pack 2 in the state where it is stored in each opening.
6 so as not to be pushed by the outer surface 26a. Each opening is formed in the ink pack 26 such that the position and number of the openings are different depending on the ink color. 9 and 10
, The printing drum 21 is a printing drum having black ink. As described above, the ink color detection sensors 13 can be provided at various places in the drum case 2. (Second Embodiment) In this embodiment, as shown in FIG. 11, a stencil printing device 50 capable of selecting an ink color is connected to a main body connection connector 37 as a connection terminal, and a plurality of drum cases 2 are stacked and arranged. It was done. In the lowermost drum case 2 stacked on the case set table 10, the case-side connector 9 is connected to the base connector 11. The drum cases 2 are connected by a lid-side connector 5 and a case-side connector 9, respectively. A current is supplied to each drum case 2 from a power supply 31 via each connector.

The stencil printing apparatus 50 is provided with a stencil making section 51 for making a master to be wound around a printing drum 21 provided detachably with respect to the apparatus main body 50A, a stencil discharging section 52 for discarding the master after printing, and mounted. Roller 57 as a printing pressure member that moves toward and away from printing drum 21 from below
Is provided in the apparatus main body 50A. The printing drum 21
It is mounted substantially at the center of the device main body 50A. The facing portion between the printing drum 21 and the press roller 57 to be mounted is
And a printing unit 61 for transferring an image to the printer.

On the right side of the apparatus main body 50A, a paper feed table 53 for mounting a paper 54 is provided so as to be able to move up and down. Above the paper 54 placed on the paper feed table 53, a paper feed roller 55 for feeding the paper 54 toward the printing unit 61 is provided. Between the paper feed roller 55 and the printing unit 61,
A registration roller pair 56 for feeding the fed paper 54 to the printing unit 61 at a predetermined timing is provided. On the left side of the apparatus main body 50A, a sheet discharge table 60 serving as a discharge section of a printed or printed sheet is provided. The paper ejection tray 60 is provided with a well-known end fence 58 and a side fence 59.

The stencil printing apparatus 50 includes an ink color detecting sensor 63 as an ink color detecting means for detecting the ink color of the printing drum 21 mounted on the apparatus main body 50A, and a drum attaching / detaching sensor 64 for detecting the presence or absence of the printing drum 21. Are disposed in the apparatus main body 50A. A display unit 65 and an ink color selection unit 70 are provided in an upper part of the apparatus main body 50A. The display unit 65 displays the ink color of the mounted printing drum 21, the selected ink color, and various information. Since the ink color detection sensor 63 has the same configuration as the ink color detection sensor 13, detailed description is omitted.

At the lower part of one side of the apparatus main body 50A, a main body connection connector 37 provided on the case set base 10 is provided.
There is provided a main body side connector 68 which serves as a connection terminal with the main body. A control device 62 is provided below the device main body 50A. The control device 62 is constituted by a well-known microcomputer, and has a function of appropriately controlling the operation of the stencil printing device 50 and the display content displayed on the display device 65.

As shown in FIG. 12, the controller 62 includes:
The ink color detection sensor 63, the drum attachment / detachment sensor 64, the display section 65, the main body side connector 68, the power supply 67, the apparatus driving section 69 of the stencil printing apparatus 50, and the ink color selection means 70 are electrically connected.

The stencil printer 5 is provided on the case set table 10.
Ink color information selected on the 0 side, that is, the ink color selected by the ink color selection means 70 and the ink color detection sensor 13
The controller 300 is provided as a control unit for comparing the ink color information detected in the step (1) and (2) with each other and displaying the selected ink color on the display units 4 and 65 when the two match. The base connector 11, the main body connection connector 37, and the power supply 31 are connected to the controller 300, respectively.

The drum identification processing in such a configuration will be described with reference to the flowchart of FIG. In step 200 in FIG. 5, a desired ink color is selected by the ink selecting means 70, and it is determined whether or not there is a printing drum corresponding to the ink color selected in step 201. Here, the ink color information detected by the ink color detection sensor 63 and the ink color information selected by the ink color selection unit 70 are compared. And if they match,
If it is determined that the printing drum corresponding to the selected ink color is present in the stencil printing apparatus 50, the process proceeds to step 202. Proceed to. In step 202, the ink color of the attached printing drum is displayed on the display section 65, and this processing ends.

In step 203, the printing drum corresponding to the ink color selected in step 201 is the drum case 2
Is determined. Here, the ink color information detected by the ink color detection sensor 13 of each ink case is compared with the ink color information selected by the ink color selection unit 70. As a result of the comparison, if the ink color information selected by the ink color selection means 70 matches the ink color information detected by the ink color detection sensor 13, the process proceeds to step 204, where the drum case detecting the matching ink color The lamp 3 is turned on, and the routine proceeds to step 205, where the ink color of the printing drum stored in the drum case 2 is displayed on the display unit 4.
And the process is terminated.

In step 203, if the ink color information selected by the ink color selection means 70 does not match the ink color information detected by the ink color detection sensor 13 of each drum case 2, that is, if the printing drum corresponding to the drum case If it is not stored or has already been taken out, the process proceeds to step 206, where the lamp 3 of the drum case 2 having no ink color information is turned off. In step 207, the display of the drum case in which the print drum is not stored is displayed. “No drum” is displayed in the section 4 and the process is terminated.

As described above, in the drum case where the printing drum of the ink color selected by the stencil printing apparatus 50 is stored or in the display portions 4 and 65 of the stencil printing apparatus 50, the presence or absence of the selected ink color and the presence of the printing drum are displayed. The display allows the user to easily know the location of the printing drum having the desired ink color.

In each embodiment, the push button switch is exemplified as the ink color detecting means. However, the present invention is not limited to the above embodiment as long as the ink color of the printing drum can be detected. An optical sensor that irradiates the surface with light and detects the ink color from its reflectivity may be used, or a magnetic sensor that provides magnetic information corresponding to the ink color on the printing drum side and reads the magnetic information May be.

[0038]

According to the present invention, when the printing drum is stored inside the drum case, the ink color is detected by the ink color detecting means, and the detected ink color is displayed on the display means. The user can be reliably notified of the ink color of the printing drum stored in the case without opening and closing the drum case.

According to the present invention, when the printing drum provided with the measuring means is stored in the drum case, the time measured by the measuring means is subtracted and corrected by the correcting means.
Since the measurement time measured inside the drum case is later than the measurement time measured outside the drum case, the idle time is corrected in consideration of the ink storage state, and the occurrence of unevenness in the printed image due to the storage state is suppressed. be able to.

When a connection terminal is exposed outside the drum case and can exchange data with a connected device, various data detected in the drum case and the device connected to the connection terminal are provided. Is exchanged between the drum case and the device, and various information can be reliably notified to the user without opening and closing the drum case.

When the connection terminals are arranged on the upper surface and the lower surface of the drum case, and the connection terminals on the upper surface and the connection terminals on the lower surface are provided so as to be connectable when the drum cases are stacked, it is preferable to stack the drum cases. Since the connection terminals of each case are connected to enable data communication between the cases, the ink color etc. can be displayed on the display means of each case, and the ink color of the printing drum stored in the drum case is The user can be more reliably notified without opening and closing the case.

A device connected to the connection terminal is a stencil printing device capable of selecting an ink color, and compares the ink color information selected by the stencil printing device with the ink color information detected by the ink color detecting means. In the case where there is a control unit that displays the selected ink color on the display device when both match, if the printing drum of the ink color selected by the stencil printing device is stored, the drum is stored. The selected ink color is displayed on the display means of the drum case,
The user can be more reliably notified of the ink color of the printing drum stored in the drum case without opening and closing the drum case.

[Brief description of the drawings]

FIG. 1 is a perspective view of a print drum case unit according to a first embodiment.

FIG. 2 is a front view of a print drum case unit.

FIG. 3 is a cross-sectional view illustrating an open state of a drum case and a stored state of a printing drum.

FIG. 4 is a block diagram illustrating a connection state of electrical components according to the first embodiment.

FIG. 5 is an enlarged cross-sectional view illustrating one configuration example of an ink color detection unit.

FIG. 6 is an enlarged sectional view showing an ink color detection state by the ink color detection means.

FIG. 7 is a flowchart illustrating an example of an ink color display process illustrated in FIG. 6;

FIG. 8 is a flowchart illustrating an example of a measurement unit correction process.

FIG. 9 is an enlarged cross-sectional view illustrating another example of the configuration of the ink color detection unit.

FIG. 10 is an enlarged sectional view showing an ink color detection state by the ink color detection means shown in FIG. 9;

FIG. 11 is a schematic configuration diagram illustrating a connection state between a printing drum case unit and a stencil printing apparatus according to a second embodiment.

FIG. 12 is a block diagram mainly showing a connection state of electrical components of the stencil printing apparatus.

FIG. 13 is a flowchart illustrating an example of a drum identification process.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case unit 2 Drum case 2a Upper surface of drum case 2b Lower surface of drum case 2C Inside of drum case 4 Display means 4A Display surface 5 Connection terminal (upper connection terminal) 9 Connection terminal (lower connection terminal) 13 Ink color detection means 21 printing drum 32 measuring means 33 detecting means 50 stencil printing machine 300 control unit

Claims (5)

[Claims] 1. A unit having a drum case for storing a printing drum, comprising: an ink color detecting means for detecting an ink color of the printing drum stored inside the drum case; and a display outside the drum case. A case unit for a printing drum, wherein the case unit is arranged so as to face the surface, and at least display means for displaying the ink color detected by the ink color detection means. 2. A printing drum case unit according to claim 1, wherein said printing drum is detected by said detecting means for detecting whether or not the stored printing drum includes a measuring means for measuring a leaving time. And a correcting unit for subtracting and correcting the time measured by the measuring unit when it is detected that the unit includes the measuring unit. 3. The printing drum case unit according to claim 1, further comprising a connection terminal exposed to the outside of the drum case and capable of exchanging data with a connected device. 4. The printing drum case unit according to claim 3, wherein the connection terminals are respectively disposed on an upper surface and a lower surface of the drum case, and when the drum cases are stacked, the connection terminals on the upper surface and the connection terminals on the lower surface. And a print drum case unit that can be connected to each other. 5. The printing drum case unit according to claim 3, wherein the device connected to the connection terminal is a stencil printing device capable of selecting an ink color, and information on the ink color selected by the stencil printing device. A case unit for a printing drum, comprising: a control unit for comparing ink color information detected by the ink color detection unit and displaying the selected ink color on the display device when both match.