JPH0311629B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a lifting device for a printing mechanism during a corrugated box forming process, and in particular to a lifting device for a printing mechanism used in a corrugated box forming process, and in particular for making a stamp for printing predetermined characters, figures, or symbols on corrugated cardboard paper vertically movable. Accordingly, the present invention relates to an apparatus that can print at a desired position regardless of the shape and dimensions of corrugated paperboard, and that enables high-precision printing such as multicolor printing, overprinting, decorative printing, etc.

BACKGROUND TECHNOLOGY In general, the process of forming a corrugated box includes a paper feeding process in which corrugated paper cut into a predetermined shape is fed;
A printing process for performing necessary printing on predetermined areas of the corrugated paperboard, a process for forming predetermined cut grooves and folded parts, a gluing process for connecting the body parts, and folding and gluing of the paper after gluing. The main work steps are: stacking the obtained products in predetermined numbers, sending the stacked products to a binding machine, and bundling the delivered products. In the above printing process, normally, as shown in FIG. 3, a conveyance path 3 for the cardboard paper 2 is formed by the feed rollers 1, 1, . . . , and a printing cylinder 4 is rotated above the conveyance path 3. A stamp 5 is fixed on the surface of the printing cylinder 4 while being freely arranged. 6 is a metering roll, 7 is an anilox roll, and ink 8 is placed between both rolls 6 and 7.
is supplied, and by rotating both rolls 6 and 7 as shown by the arrow, the anilox roll 7
The ink is applied to the stamp 5 from the conveyance path 3.
When the corrugated paperboard 2 conveyed along the printing cylinder 4 passes under the printing cylinder 4, the stamp 5 comes into pressure contact with the corrugated paperboard 2, so that predetermined printing can be performed.

Problems to be Solved by the Invention However, according to such a conventional printing mechanism, the printing position of characters etc. on the cardboard paper 2 is determined by the diameter length of the printing cylinder 4.
In other words, the circumferential dimension of the printing cylinder 4 is taken as one pitch, and printing is performed by pressing the stamp 5 against the corrugated paper 2 for each circumferential dimension, so the printing position cannot be easily changed. There is a problem. Generally, corrugated boxes are produced with a standardized shape, and there is no problem when printing continuously on the same type of corrugated paper, but when printing on corrugated paper that is larger than the circumference of the printing cylinder 4, When printing, the printing cylinder 4 cannot be used as is, so
Printing must be performed using a printing press equipped with a printing cylinder having a circumferential dimension larger than the printing cylinder 4. Therefore, there is a problem in that the equipment costs are increased, leading to high costs.

Therefore, the present invention solves the problems of the conventional cardboard box printing mechanism described above, and allows the printing pitch to be arbitrarily set regardless of the circumferential dimension of the printing cylinder 4, and To provide an apparatus capable of printing characters, figures, or symbols at desired positions on any type of corrugated paperboard, and capable of performing high-precision printing such as multicolor printing, overprinting, decorative printing, etc. The purpose is to

Means for Solving the Problems In order to achieve the above object, the present invention includes a pair of fixed frames erected on both sides of a corrugated paper conveyance path, and a pair of fixed frames installed across the fixed frames.
A plurality of feed rollers that transport the corrugated paper in the horizontal direction, a pair of slide frames that are attached to the fixed frame so as to be slidable in the vertical direction, and a drive that moves the slide frames up and down along the fixed frame. a printing cylinder mounted across the slide frame and having a stamp fixed on its surface and driven to rotate at the same speed as the conveyance speed of the corrugated paper; A lifting structure for a corrugated box printing mechanism, comprising: a plurality of sensors that detect passage and activate the drive mechanism of the slide frame; and an ink supply mechanism that applies ink to the stamp. be.

According to the present invention having the above configuration, predetermined characters and figures are continuously placed at predetermined positions on corrugated paper having a length dimension exceeding the circumferential dimension of the printing cylinder, or on corrugated paper having different shapes and dimensions. Alternatively, when printing a symbol, if the sensor does not detect the passage of the cardboard paper, the pair of slide frames slide upward along the pair of fixed frames, and the cardboard paper moves idly. On the other hand, when the sensor detects that the corrugated paper has reached a predetermined position, the slide frame slides downward along the fixed frame based on the signal from this sensor, and the printing paper attached to the slide frame A stamp fixed to the surface of the cylinder receives ink supplied from an ink supply mechanism and is pressed against the corrugated paper, thereby printing on the corrugated paper.

Therefore, even when printing on corrugated paperboards having different length dimensions, since the slide frame starts sliding after the sensor detects the passage of the corrugated paperboard paper, the printing start pitch can be set arbitrarily. Furthermore, since the printing cylinder is driven to rotate at the same speed as the conveyance speed of the corrugated paper, characters and letters can be placed at desired fixed positions on the corrugated paper.
This provides the effect that figures or symbols can be printed continuously.

Embodiment The present invention will be described below based on an embodiment shown in the drawings.

FIG. 1 shows a specific example of a lifting device, in which a corrugated paperboard 2 is conveyed in the direction of arrow A.
Reference numerals 11 and 11 denote a pair of fixed frames erected on both sides of the conveyance path of the corrugated paperboard 2, and a pair of slide frames 1 are attached to the fixed frames 11 and 11.
2 and 12 are attached so as to be slidable in the vertical direction. The fixed frame 11 has feed rollers 1, 1, . . . that form a horizontal conveyance path for the corrugated paperboard 2.
is attached, and a predetermined rotational force is applied from a drive source such as a motor (not shown). On the other hand, slide frame 1
A printing cylinder 13 is pivotally attached to the slide frames 12 and 12, and a stamp 14 is fixed to the surface of the printing cylinder 13. The printing cylinder 13 is rotated together with the feed rollers 1, 1, . . . at the same speed as the conveyance speed of the corrugated paperboard 2. The slide frames 12, 12 are further provided with a metering roll 15 and an anilox roll 16 at a position close to the printing cylinder 13, and the ink 8 supplied between the two rolls 15, 16 is transferred to the anilox roll 16. It is possible to apply it to the surface of the stamp 14 through the . That is, the metering roll 15 and the anilox roll 16 constitute an ink supply mechanism for the stamp 14.
Linear motion bearings are installed between the fixed frames 11, 11 and the slide frames 12, 12 to enable smooth sliding movement. Further, brackets 17, 17 each having an inverted L-shaped cross section are fixed to the upper ends of the fixed frames 11, 11, and two drive connecting shafts 18, 19 are spanned between these brackets 17, 17. The drive coupling shafts 18, 19 are connected to the brackets 17,
17 and is in contact with the slide frames 12, 12, and the drive connecting shafts 18, 1
Eccentric cams 20, 20 are fixed to both ends of 9. In other words, eccentric cam 2
0 and 20 are fitted into the slide frames 12 and 12, so that the slide frames 12 and 12 can move up and down in accordance with the rotation of the eccentric cams 20 and 20. Drive connection shaft 1
Joints 21, 21 and 22, 22 are fixed to the joints 8, 19, respectively, and two connecting links 23, 24 are attached to connect the joints 21, 22, and both drive connecting shafts 18. , 19 are cyclically linked. Further, the joints 25 and 26 fixed to the drive connecting shaft 19 are equipped with a drive air cylinder 27,
28 are connected. 29 and 30 are balance air cylinders.

Further, a plurality of sensors are installed on the conveyance path of the corrugated paperboard 2 to detect the passage of the corrugated paperboard 2, and the driving air cylinders 27, 28 are operated and controlled by these sensors. Equipped with a digital preset counter that generates a drive signal.

According to this configuration, the driving air cylinder 27,
When 28 is expanded and contracted as shown by arrow B, the drive connecting shafts 18 and 19 rotate as shown by arrow C.
Eccentric cams 20, 20 provided at both ends of the drive connecting shafts 18, 19 rotate, and the slide frames 12, 12 are connected to the fixed frames 11, 1.
It can be moved up and down along 1. Therefore, a printing cylinder 13 and a metering roll 15 whose both ends are pivoted to the slide frames 12, 12,
Both the anilox rolls 16 move up and down.

An actual example of printing characters, figures, or symbols on corrugated paperboard using the above-described lifting device of the printing mechanism will be described below. That is, the printing position is preset in the digital preset counter 31 as shown in FIG. 2A. Then, first, cardboard paper 2
is being conveyed in the direction of arrow A, the first sensor 32 detects the passing of the leading edge of the corrugated paperboard 2,
At the same time, the digital preset counter 31 starts counting in response to a signal issued from the second sensor 33. While the counting is continuing, the printing cylinder 13 and the stamp 14 are idling as shown in FIG. Next, when the digital preset counter 31 reaches the initially set preset value, the drive air cylinders 27 and 28 start operating, and the printing cylinder 13 moves toward the arrow shown in FIG. 2C based on the operating principle described above. The printing cylinder 13 descends as shown in D, and then the printing cylinder 13 comes close to the corrugated paperboard 2 as shown in D in the figure. When the printing cylinder 13 further rotates from this state, the stamp 14 is
comes into pressure contact with the corrugated paper 2, and the corrugated paper 2
Print predetermined characters, figures, or symbols on. Same figure F
indicates a state in which the third sensor 34 has detected the completion of printing, and the signal from the third sensor 34 is transmitted to the driving air cylinders 27 and 28.
The printing cylinder 13 rises. Thereafter, similar operations are repeated, and printing can be performed at desired fixed positions on the corrugated paperboard sheets that are sequentially conveyed along the conveyance path. As is clear from the above explanation of the operation, the printing cylinder 13 is connected to the slide frames 12, 12.
The slide frames 12, 12 move up and down in conjunction with the driving air cylinders 27, 28.
The drive is controlled by. Therefore, even when printing on corrugated paperboards having different length dimensions, the slide frame starts sliding after the sensor detects the passage of the corrugated paperboard.
The printing start pitch can be arbitrarily set, and the contact start position between the stamp 14 and the corrugated paper 2 can be arbitrarily set regardless of the circumferential dimension of the printing cylinder 13, and any length dimension can be set. Even if the corrugated paper 1 is held, it is possible to print at a desired position.

Effects of Shipping As explained above in detail, the lifting device for a corrugated box printing mechanism according to the present invention includes a pair of fixed frames erected on both sides of a corrugated paper conveyance path, and a lifting device mounted across the fixed frames. a plurality of feed rollers that transport the corrugated paper in the horizontal direction; a pair of slide frames that are attached to the fixed frame so as to be slidable in the vertical direction; a printing cylinder mounted across the slide frame and having a stamp fixed on its surface and driven to rotate at the same speed as the conveyance speed of the corrugated paper; It is equipped with a plurality of sensors that detect the passage of paper and operate the drive mechanism of the slide frame, and an ink supply mechanism that applies ink to the stamp, so it can be used regardless of the circumference of the printing cylinder. , it becomes possible to print at a predetermined position on cardboard paper of any length. That is, when the sensor does not detect the passage of the corrugated paper, the pair of sliding frames slides upward along the pair of fixed frames, and
While the corrugated paper is running idle, when a sensor detects that the corrugated paper has reached a predetermined position, the slide frame slides downward along the fixed frame based on the signal from this sensor,
A stamp fixed to the surface of a printing cylinder attached to the slide frame receives ink supplied from an ink supply mechanism and is pressed against the corrugated paper, thereby printing on the corrugated paper.
Therefore, even when printing on corrugated paperboards with different length dimensions, the slide frame starts sliding after the sensor detects the passage of the corrugated paperboard paper, so the printing start pitch can be set arbitrarily. Furthermore, since the printing cylinder is rotated at the same speed as the conveyance speed of the corrugated paper, characters, figures, or symbols can be continuously printed at desired fixed positions on the corrugated paper. . Therefore, even when it is necessary to continuously print on corrugated paper having a length that exceeds the circumference of the printing cylinder, or on corrugated paper having different shapes and dimensions, the printing cylinder is There is no need to use another printing machine with a different circumferential dimension, and printing can be continued as is. Therefore, it is possible to perform high-precision printing such as multi-color printing, overprinting, decorative printing, etc. at a predetermined position on a cardboard box, which increases the versatility of the printing mechanism and improves work efficiency. This has the great effect of helping to reduce costs. The printing mechanism disclosed in the embodiments of the present invention has been explained as the most suitable embodiment for carrying out the present invention, but the present invention is not limited to the above embodiments, and other embodiments may be used. Needless to say, the present invention can also be applied to other printing mechanisms.

[Brief explanation of the drawing]

FIG. 1 is a perspective view illustrating the main parts of a lifting device of a corrugated box printing mechanism according to the present invention, FIG. 2 is a diagram illustrating its operation, and FIG. be. 1...Feed roller, 2...Cardboard paper, 11
...Fixed frame, 12...Slide frame,
13...Printing cylinder, 14...Seal stamp, 15...
...Metering roll, 16... Anilox roll, 18, 19... Drive connection shaft, 20...
... Eccentric cam, 23, 24 ... Connection link, 27, 28 ... Driving air cylinder, 2
9, 30... Balance air cylinder, 31...
Digital preset counter.

Claims (1)

[Claims] 1. A pair of fixed frames erected on both sides of the corrugated paper conveyance path, a plurality of feed rollers that are attached across the fixed frames and transport the corrugated paper in the horizontal direction, and A pair of slide frames that are attached to be slidable in the vertical direction, a drive mechanism that moves the slide frames up and down along the fixed frame, and a seal that is attached to span the slide frames and have a stamp fixed to the surface. a printing cylinder rotated at the same speed as the conveyance speed of the corrugated paper; a plurality of sensors installed in the conveyance path to detect passage of the corrugated paper and actuate the drive mechanism of the slide frame; A lifting device for a cardboard box printing mechanism, comprising an ink supply mechanism for applying ink to a stamp.