JPH0674334U - Printer - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to clearly monitor the printing on the surface of the material being transferred from a certain position (height), and it is troublesome even if the shape or size of the material is changed. The height can be easily adjusted without any trouble. [Structure] An ink transfer type printing roll 6 and a sensor 12 of a monitoring device which is installed immediately after the printing roll 6 and monitors the printing condition on the surface of a synthetic resin pipe P are mounted on the same printing machine base 3. Further, the synthetic resin pipe P is supported by the support roll 9, and when the size of the synthetic resin pipe P is changed, the handle 1
It is only necessary to operate 0 and 11 to move the printing machine base 3 and the support roll 9 up and down on the support column 2 to adjust the height. The signal detected by the sensor 12 is used as a judgment unit 14 and a calculation unit 16
Etc., and the status of printing, the content of abnormality, etc. are displayed by the alarm device 18, the monitor device 19, etc.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a printing apparatus, and more particularly to a printing apparatus suitable for continuously printing on the surface of a material being transferred, such as a long plastic extrusion molded product.

[0002]

[Prior art]

 It is important to specify the standard, size, product name, manufacturer name, lot number, etc. on the surface of a long body (material to be printed) that is being transferred, such as synthetic resin pipes, rain gutters, flooring materials, and plastic extrusion products. Printing of various matters. In particular, in the case of products that have acquired JIS or other public standards, it is obligatory that the above-mentioned display is clearly displayed.

In such printing, usually, ink scooped from an ink fountain with an ink roll is applied to a metal plate fixed to the surface of a type wheel, on which marks, prints and the like are engraved, and then, The ink applied to the plate is transferred onto the surface of a printing roll made of an elastic material such as rubber, and then the printing roll is pressed against the surface of a long body that moves at the same linear velocity as the peripheral speed to transfer the ink. Method of printing, or fix a metal plate with engraved predetermined marks and markings on the surface of the type wheel and heat it with electric heat etc., and sandwich it between the long body and the surface of the type wheel. It is carried out by a method in which the ink is thermally melted and printed by pressing it against a moving printing ribbon.

In printing such a long body, unclear printing, smearing of printing, and other troubles may occur due to poor ink quality, poor ink coverage, poor print ribbon supply, defective plates, and other causes. May occur. However, in the past, the printing condition was checked at the start of production or when the date or lot number was changed, and if defective printing was found, necessary measures were taken, but during normal operation printing They rarely monitor the condition and often find print defects during product inspection.

[0005]

[Problems to be solved by the device]

 However, now that the recognition that the quality of printed indications indicates the quality of each product has become widespread, and in the case of printing that is required to be labeled in particular, it is clear that the prescribed printing is done clearly. Required. Therefore, it is too late for defective printing to be detected during product inspection, and it is essential to detect defective printing as soon as possible and take countermeasures. It must be able to be monitored.

On the other hand, on the other hand, in many cases, automation of production has advanced to a state close to unmanned operation, and therefore, it is almost impossible for an operator to meticulously inspect the printing state with the naked eye while patrolling the production line. Absent. In addition, since the printing position is small, it is difficult to monitor with the naked eye.

On the other hand, in order to clearly monitor and judge the printing state, it is important to always fix the eye position at a fixed position (especially the height from the printing surface to the monitoring position) that is most easy to see and monitor. However, this requires moving up and down the position to be monitored if the shape and size of the product to be produced (and thus to be printed) changes, especially around narrow printing devices. Then there are difficulties.

The present invention has been made in view of the above-mentioned conventional technology and the problems in the present situation, and it is possible to solve such problems and to always monitor a printed display from a fixed position. Moreover, it is an object of the present invention to provide a printing apparatus that can easily adapt to changes in the shape and size of products.

[0009]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the printing apparatus of the present invention is a printing apparatus that presses a printing roll against the surface of a material being transferred to perform printing, and is a printing machine mount on which the printing roll is mounted. And the height of the support roll that supports the printing material can be adjusted separately on the columns, and the printing machine stand has a printing condition monitoring device installed near the rear of the printing roll. That is the main point.

The monitoring device used in the present invention is a device that captures an image purely optically, a device that converts the optically captured image into an electric signal / electronic signal, a device that judges by human perception, or a computer. There is no particular limitation on what is judged by the above, but it is preferable that it can be installed in a narrow space and has a high resolution. It should be noted that the monitoring device may be only a “sensor” unit that captures an image.

[Action]

 In the printing apparatus of the present invention, the printing monitoring device is installed in the vicinity of the rear of the printing roll on the printing machine frame equipped with the printing roll for printing. Can be monitored shortly thereafter and the necessary measures can be taken as soon as printing defects are found.

Further, since the height of the printing machine base and the supporting rolls supporting the material to be printed can be adjusted separately on the columns, for example, the handle of the height adjusting device can be rotated to move up and down. By performing a simple operation of, it is possible to adjust and support the support roll and the printing press stand to a height suitable for the shape and size of the printing material, and to position the monitoring device on the printing press stand. The distance between the surface of the substrate and the monitoring device can always be kept constant without the need for adjustment.

[0012]

【Example】

 An embodiment of the printing apparatus of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic explanatory view showing the configuration of a printing apparatus according to an embodiment of the present invention, showing a usage state of a synthetic resin pipe in an extrusion molding line.

As shown in FIG. 1, the column 2 of the printing apparatus 1 supports a printing machine base 3 on the upper side and a support roll 9 on the lower side. The printer base 3 and the support roll 9 are connected by a support mechanism such as a support 2 and a pinion and a rack, and a worm and a worm wheel, and are rotated vertically by rotating a handle 10 or 11 respectively. The height is adjustable by moving in the direction.

The printing machine base 3 is equipped with a main body portion for printing such as an ink roll 4, a type wheel 5, a printing roll (transfer roll) 6, an ink fountain 7, a doctor knife 8 and the like. .

Further, a sensor 12 of a monitoring device for monitoring the printing state is installed on the printing machine frame 3 just behind the printing roll 6, that is, just behind the printing position. The optimum detection distance (the optimum distance between the sensor 12 and the printing unit) in the above-mentioned embodiment is 70 mm 2.

Next, the operation of the printing apparatus 1 configured as above will be described. A printing device installed behind (but may be in front of) the take-out machine on the outer surface of the synthetic resin pipe P that is extruded by an extruding machine (not shown) and is transferred from the left side to the right side as shown by arrow A by the take-up machine (not shown). Required printing is performed according to 1.

In a state where the extruded state is normally settled, the handle 11 is operated to adjust the support roll 9 in the vertical direction so that the synthetic resin pipe P is correctly supported at the height of the extrusion molding line. Then, the handle 10 is operated to adjust the printer base 3 in the vertical direction, and the printing roll 6 is brought into contact with the center line of the outer surface of the synthetic resin pipe P, so that the printing roll 6 is transferred by the synthetic resin pipe P. The type wheel 5 that is driven and is in contact with the printing roll 6 and the ink roll 4 that is in contact with the type wheel 5 are driven at the same time.

As a result, the ink in the ink fountain 7 adheres to the ink roll 4 and is scooped up, scraped off by a doctor knife 8 to an appropriate coating thickness, and transferred to a plate fixed on the surface of the type wheel 5. Then, the image is transferred onto a rubber blanket surface provided on the outer circumference of the printing roll 6, and is transferred from the blanket surface to directly above the outer surface of the synthetic resin pipe P to perform printing.

Printing such as marks and prints on the outer surface of the synthetic resin pipe P is immediately received and judged by the movement of the synthetic resin pipe P by a sensor 12 installed immediately behind the printing roll 6. And the necessary action is taken.

When the type or size of the product is changed, the height of the printing roll 6 (and thus the printing press mount 3) and the height of the support roll 9 are usually changed, but the sensor 12 is used for the printing press mount 3. Since it is fixed to the printing roll 6 and moves only in parallel with the printing roll 6 at the same distance, the relative position of the sensor 12 with respect to the printing position (in particular, the height h from the printing surface of the monitoring device 12) does not change, and therefore the printing There is no need to bother adjusting the position of the monitoring device 12 on the machine frame 3.

The result detected by the sensor 12 is transmitted to the determination unit 14 by a transmission unit 13 such as a cable or an optical fiber, and the set value given to the determination unit 14 from the adjustment unit 15, for example, a series of values in a normal state. Of the printing time (the time pattern is different in the case of faint printing or printing failure), the character pattern, the color shading, etc., and the calculation unit 16 such as a microcomputer calculates the abnormalities. For example, it is possible to know the abnormality by sounding the alarm of the alarm device 18 or displaying it on the monitor device 19 in the monitoring room. Further, as a simpler method, an image of the printing state may be displayed on the monitor device 19 and the operator may collectively monitor and judge.

[0022]

[Effect of device]

 As is clear from the above description, since the printing apparatus of the present invention has the printing monitor mounted on the printing machine frame on which the printing roll is mounted, the printing monitoring apparatus is installed in the vicinity of the rear of the printing roll. The results can be monitored immediately.

Further, it is easy to adjust the heights of the printing machine base and the supporting rolls supporting the material to be printed separately on the support columns, and the supporting rolls are set to a height suitable for the shape and size of the material to be printed. Since it can be adjusted and supported, and the distance between the surface of the printing material and the monitoring device for printing can always be kept constant without the need for complicated adjustments, it is easy to always obtain a clear print result. Therefore, it is possible to effectively improve the print quality.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a configuration and a usage mode of an embodiment of the present invention.

[Explanation of symbols]

 1 Printing Device 2 Support 3 Printer Stand 6 Printing Roll 9 Support Roll 12 Monitoring Device (Sensor)

Claims (1)

[Scope of utility model registration request] 1. A printing apparatus for performing printing by pressing a printing roll against the surface of a material to be printed being transferred, wherein the height of a printing machine stand on which the printing roll is mounted and the height of a support roll supporting the material to be printed are It is made separately adjustable on the pillar,
A printing apparatus, wherein a printing state monitoring device is installed on the printing machine base in the vicinity of the rear of the printing roll.