JP3282803B2 - Printing equipment in packaging machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing apparatus in a packaging machine for printing a date of manufacture, a shelf life, and the like on a bag before filling the contents.

[0002]

2. Description of the Related Art In a conventional rotary type packaging machine, a printing apparatus detects an amount of movement of a bag by a pulse encoder installed in accordance with a position of the bag supported by a pair of grips, and the ink jet is fixed to a machine base. Controls the ejection timing of ink ejected from the print head to synchronize with the signal detected by the pulse encoder, and ejects ink to bags that move at irregular speed with intermittent rotation by the Geneva mechanism. In this case, the date of manufacture and the expiration date are printed.

[0003]

In the above-described conventional printing apparatus, since the bag to be printed is not stationary and the printing surface is not stable, the printed characters are likely to be disturbed. In addition, since a pulse encoder that detects the amount of bag movement is installed close to the rotating plate on which a large number of grip pairs are mounted, the structure of the equipment becomes complicated when viewed from the entire packaging machine, and maintenance of those equipment is performed. There was an annoyance that management had to be performed. In addition, if the printing state applied to the bag is unclear, it is not preferable because it inconveniences the purchaser in terms of the quality assurance of the product.

It is an object of the present invention to provide a printing apparatus for a packaging machine that performs printing of a manufacturing date, a shelf life, and the like without disorder.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, a plurality of grip pairs are intermittently stopped and moved at a plurality of stations while being suspended by the grip pairs. After the required printing, such as date of manufacture and expiration date, is performed on the bag supported by the printing station using a printing device, the contents are filled at the filling station, and the bag mouth is sealed at the sealing station. a packaging machine so as to discharge to the outside, the printing device includes a back plate disposed on the front side of the bag to be intermittently stopped, the printing unit
A window hole is opened at a position corresponding to the
A bag holding means provided so as to sandwich the bag and press around the printing portion by a pressing plate provided to face the machine;
A moving member parallel to the printing surface of the stopped bag and horizontally movable by a driving device is provided on a base provided on the base so that the height can be adjusted , and an ink jet type print head is moved to the moving member. consists of a printing unit mounted on perpendicularly against the said bag press a bag to intermittent stop
The printing device moves the print head at a constant speed by the driving device in a state where the printing device is stopped by the control device, and performs required printing on the bag .

[0006]

The bag intermittently stopped at the printing station is held between the back plate of the bag holding means and the pressing plate.
When the printing member is pressed around the printing portion, the moving member to which the print head is attached starts to move forward or backward by driving the drive device, and the printing head moved at the constant speed causes the manufacturing date, expiration date, etc. Required printing is smoothly performed.

[0007] According to the printing inspection apparatus of this packaging machine, required printing such as the expiration date can be neatly performed without disturbance while the bag is stationary. As a result, there is an advantage that an unforeseen situation such as inconvenience to a product purchaser due to printing defects such as the expiration date is avoided in advance.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a side view of the printing apparatus, FIG. 2 is the same plan view, FIG. 3 is the same rear view, and FIG.
FIG. 5 is a plan view of a rotary type packaging machine to which the printing apparatus is applied.

The printing apparatus 1 shown in FIG. 1 is installed in a printing station ii of a rotary type packaging machine p as shown in FIG. This general packaging machine p is used for a bag feeding station.
i, Printing station ii, Bag opening station iv, Filling station v, Bag bottom vibrating station vi, Sealing station viii / ix, Sealing section cooling and discharging station
It consists of 10 steps, such as x, and a number of grip pairs g are intermittently stopped and moved at each station, and at the printing station ii, the side edges are gripped by the grip pairs g and supported in a hanging manner. The required markings such as the date of manufacture and the expiration date are given on the back side of the
After filling the contents with v, seal station viii / ix
The bag 50 is configured to discharge the bag 50 outside the machine after the bag mouth is sealed.

The printing unit 10 of the printing apparatus 1 is provided on a stand 2 fixed on a machine base a of the packaging machine p. The support plate 3 fixed to the upper end of the stand 2 having the rectangular cross section passes through the upper end 4a with the adjustment bolt 4 having the screw 5 formed in the vertical direction.
The handle 6 is attached to a. Printing unit 1
A U-shaped guide frame piece 13 having a nut body 14 protruding therefrom is provided on one side surface 11a of the base 11. Then, the guide frame piece 13 is loosely fitted to the outer periphery of the stand 2 and the nut body 14 is screwed into the screw 5 of the adjusting bolt 4 to adjust the height of the base 11 (that is, the printing height position). Adjustably provided (Fig. 3). A movable rod 15 as a movable member is slidably supported in the horizontal direction on the side pieces 12, 12 protruding from the other side surface 11b of the base 11. The moving rod 1
The front end of the guide bar 16 supported by the side piece 12 on the front side near the stand 2 in parallel with the moving rod 15 is fixed by a connecting piece 17. The connecting piece 17
A short supporting rod 18 having a rectangular shape is provided in parallel with the moving rod 15, and a supporting block 19 to which an ink jet type print head 20 is mounted orthogonally to the moving rod 15 is fixed to the supporting rod 18. I have.

The print head 20 of the ink jet system is used to print necessary printing such as the date of manufacture and the expiration date on a bag. The print head 20 and a printing operation and control device not shown are described by Hitachi, Ltd. KX type IJ printer is used.

As shown in FIG. 1 and FIG.
A motor device 25 as a driving device is attached to one side surface 11a, and a pinion 27 is fixed to an output shaft 26 of the motor device 25 which is passed through a through hole 11c formed in the base 11. A rack 28 having teeth 29 disposed on the lower surface is attached to the side surface of the moving rod 15, and the teeth 29 are engaged with the pinion 27. Then, the pinion 27 is driven and rotated by the motor device 25, so that the support rod 18, to which the print head 20 is attached, that is, the movable rod 15 is reciprocally movable within a certain dimension. Here, the motor device 25 is employed as the driving device, but a configuration in which the moving rod 15 is reciprocated by a pneumatic cylinder may be used instead.

Reference numeral 30 denotes a bag holding means for pressing the periphery of the printing portion 51 of the bag 50. The back plate 31 of the bag holding means 30
Is arranged on the front side of the bag 50 stopping at the printing station ii so as to be slightly spaced from the bag 50, and is attached to a bracket 32 fixed to the machine base a. As shown in FIGS. 1 and 3, a bracket 34 to which a cylinder device 35 containing a small pneumatic cylinder is attached is provided on the front side piece 12 of the base 11 of the printing unit 10. The rod 3 of the cylinder device 35
A pressing plate 37 made of a thin plate material is provided on the plate piece 36 fixed to the tip of 5 a so as to face the back plate 31. 3
Reference numeral 8 denotes a window hole formed in the pressing plate 37, which is provided at a position corresponding to the printing portion 51. As described above, the printing device 1 in the packaging machine is configured.

Next, the operation of the printing apparatus 1 will be described. (1) When the bag 50 supported by the grip pair g at the printing station ii of the packaging machine p is stopped, first, the cylinder device 35 of the bag holding means 30 is operated, and the printing portion 5 of the bag 50 is operated.
1 is pressed by the pressing plate 37. (2) Next, the moving rod 15 to which the print head 20 is attached
Starts moving forward or backward by driving the motor device 25, ink is continuously ejected from a nozzle (not shown) of the print head 20, which is controlled to move in the horizontal direction at a substantially constant speed, and the manufacturing year Required printing such as date and expiration date is smoothly performed. (3) When printing is completed, the moving rod 15 is moved to the forward end position or the retracted end position by the motor device 25 and stopped, and the rod 35a of the cylinder device 35 of the bag holding means 30 is retracted to press the pressing plate 37. Leaves the bag 50. Then, the printed bag 50 is transferred to the next process, and at the same time, when a new bag is sent, the operation (1) is started again.

As described above, the printing device of this packaging machine can perform required printing such as the expiration date without disorder by the ink jet printing head in a state where the bag is stationary.

[Brief description of the drawings]

FIG. 1 is a side view of a printing apparatus.

FIG. 2 is a plan view of the same.

FIG. 3 is a rear view of the same.

FIG. 4 is a sectional view taken along line AA of FIG. 2;

FIG. 5 is a plan view of a rotary packaging machine to which the printing device is applied.

[Explanation of symbols]

p → packaging machine a → machine g → grip pair 1 → printing device 10 → printing unit 11 → base 1
5 → moving rod (moving member) 20 → print head 25 → drive device (motor device) 27
→ Pinion 28 → Rack 30 → Bag holding means 31 → Backboard 50 → Bag 51 → Printing part

Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) B65B 61/02 B65B 3/00-3/36 B65B 43/50

Claims (1)

(57) [Claims] 1. A manufacturing apparatus according to claim 1, wherein a plurality of grip pairs are intermittently stopped and moved at each of a plurality of stations, and a bag is supported by said grip pairs in a hanging manner. required printing alms etc., after filling the contents in the filling station, in the packaging machine which is adapted to discharge to the outside of the apparatus from being subjected to sealing of the bag mouth by the sealing station, the printing device is a bag for intermittent stop The back arranged on the front side of
When a window and a window are opened at a position
And a pressing plate provided so as to face the back plate.
A bag holding means provided so as to pinch the periphery of the printing portion by holding the base, and a base provided on the machine base so as to be adjustable in height , and driven in a horizontal direction in parallel with the printing surface of the stopped bag. orthogonal the print head of an ink jet type provided with a movable member which is freely forward and backward by the device for the said movable member
It consists of a printing unit mounted in a shape and stops intermittently.
Bag while moving the print head at a constant speed by the drive unit of the bag at a stationary state by said bag holding means
Printer in the packaging machine, characterized by being configured to perform a desired printing on.