JPS6122635B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is directed to a screen such as a handle tip that can perform three-color screen printing on the surface of a printing material having a protrusion such as a handle tip. The present invention relates to printing devices.

(Prior Art) Conventionally, screen printing on the outer surface of handle-equipped cups and the like has been mainly performed using semi-automatic machines. This semi-automatic machine has a single printing head and
This is a type of device in which the printing material is manually fed to the printing head, and the person feeds a handle-equipped tip or the like to the printing head while aligning the direction of the handle in a constant manner by visual inspection. Therefore, the accuracy of positioning is poor, and multicolor printing is almost impossible because the printing position shifts each time. For this reason, in the past, it was necessary to rely on transfer printing to perform multicolor printing on the surface of hand-painted pots, etc., but it is well known that this method also has extremely low productivity compared to screen printing. .

(Problems to be Solved by the Invention) The present invention has been made in order to solve the above-mentioned drawbacks of the prior art. An object of the present invention is to provide a screen printing device capable of performing positioned three-color printing. Another object of the present invention is to provide a screen printing device that can perform the above-described printing at high speed and that allows for easy product changes.

(Means for Solving the Problems) The present invention comprises six planetary gears that are supported at equal intervals on a rotary disk that rotates intermittently and revolve around a sun gear, and a cover that is attached coaxially with the planetary gears. In a device that is equipped with a printing material holder and performs screen printing on the surface of a pot with a handle, etc. by rotating the printing material holder by an angle of less than 360 degrees when the rotary disk is stopped,
Horizontal screens are provided at two positions above the rotary disk and one vertical screen is provided on the side of the rotary disk, and a driving means independent of the planetary gear is attached to the printing material holder to rotate the rotary disk. The method is characterized in that the printing material holder is rotated in a direction to avoid interference between the handle of the printing material and the vertical screen by actuating a driving means for the printing material holder that moves from a horizontal screen to a vertical screen. It is something to do.

(Examples) The present invention will be explained in more detail below using examples. FIG. 1 is a front view, FIG. 2 is a right side view, and FIG. 3 is a central vertical sectional view of the main part.

The apparatus of this embodiment has a rotating disk 2 that rotates intermittently by 60 degrees in the direction of the arrow around a horizontal axis 1, and six sets of printing material holders 3 mounted around the rotating disk 2 at equal intervals. This printing material holder 3 is
As shown in the figure and FIG.
and a bottom holder 6 that holds the bottom part.
As will be described later, the bottom holder 6 is coaxially connected to a planetary gear 7, and each planetary gear 7 is always engaged with a sun gear 8.

As shown in FIG. 1, the printing substrate 4 is checked at position A, aligned at B, C, D,
It is printed at three positions E and taken out at F. As the rotary disk 2 rotates intermittently, the printing medium 4 passes through each of these positions in sequence.

Sun gear 8 is integrally attached to gear 9.
The rack 10, which engages with the rack 10, rotates in both forward and reverse directions by an arbitrary angle. 1st
In the figure, if the counterclockwise direction, which is the direction of rotation of the rotary disk, is defined as the positive direction, then the rotation speed Np of the planetary gear in this planetary gear mechanism can be calculated by the following equation.

Np=(1+Zs/Zp)×Nr−Zs/ZpNs where Zs: number of teeth of the sun gear, Zp: number of teeth of the planetary gear, Nr: number of rotations of the rotary disk, Ns: number of rotations of the sun gear.

In this example, Zs = 225 and Zp = 45, so when the rotary disk 2 rotates 60 degrees, if the sun gear is rotated 54 degrees in the same direction, Nr = 1/6 and Ns
By substituting =3/20, Np = 1/4. Next, turntable 2
If the sun gear is reversely rotated by 54 degrees when stopped, Nr
= 0, and by substituting Ns = -3/20, Np = 3/4.
This means that each time the rotary disk rotates 60 degrees, the planet gear rotates 90 degrees counterclockwise, and when the rotary disk is stopped, the planet gear rotates 270 degrees counterclockwise.

Next, the printing material holder and its driving portion shown in FIG. 3 will be explained.

A bearing 11 is fixed to the rotary disk 2, and a spindle sleeve 12 is supported inside the bearing. The left end of the spindle sleeve 12 is connected to the planetary gear 7 supported by a ball bearing 13 via a friction clutch 14.

Inside the spindle sleeve 12, a needle bearing 15 and ball bearings 16, 17 are provided.
The spindle shaft 18 is rotatably supported by. A bottom holder 6 is fixed to the right end of the spindle shaft 18. An electromagnetic clutch 19 is provided between the spindle shaft 18 and the spindle sleeve 12. That is, an electromagnetic clutch 19 including a coil 20 and an armature 21 is attached to the right end of the spindle sleeve 12, and its rotor 22 is fixed to the spindle shaft 18 by a key 23.

As a result of the above configuration, the rotational force given by the sun gear 8 is transmitted from the planetary gear 7 to the friction clutch 14 to
The printing medium 4 is rotated along the path of spindle sleeve 12 → electromagnetic clutch 19 → spindle shaft 18 → bottom holder 6.

On the other hand, the mouth holder 5 that holds the opening of the printing medium 4 is attached to a shaft 24, and the shaft 24 is rotatably and slidably supported by a bearing 25 fixed to the rotary disk 2. When the shaft 24 slides to the right, the printing medium 4 is fed or taken out. A gear 27 is fixed to the shaft 24 by a key 26, and a gear 29 attached to the output shaft of a pulse motor 28 meshes with this gear 27. The above-mentioned pulse motor 28, gear 27, and gear 29 constitute the driving means referred to in the claims. By turning off the aforementioned electromagnetic clutch 19 and separating the bottom holder 6 from the planetary gear 7, and then operating the pulse motor 28, the printing medium 4 can be rotated in any direction and at any angle. In addition, above the rotary disk 2, there are two horizontal screens 3 at positions C and D.
2 and 33 are provided, and one vertical screen 34 is provided at the E position on the side of the rotary disk 2. Three colors are sequentially printed on the surface of the printing material 4 by these three screens.

(Function) Here, the operation of this device will be explained again based on FIG. 1.

The printing material 4 is previously aligned with the handle 30 facing downward, and is fed to the printing material holder 3 at position A. Since the orientation of the handle 30 is accurately aligned at the next position B, there is no problem even if there is some error. As mentioned above, the printing material holder 3 rotates 270 degrees counterclockwise while the rotary disk 2 is stopped, so the handle rotates to the position shown by the broken line, and then revolves to position B. It begins. In this way, the handle sequentially changes its direction at each position. For convenience of explanation, the direction of the handle before the printing material holder 3 starts to rotate at each position is designated as S, which means start, and the direction of the handle when the rotation ends is designated as L, which means last.

Now, when moving from position A to position B, the printing material holder rotates 90 degrees and the handle becomes in the S direction as described above. Next, at position B, planet gear 7 is 270
The stopper 31 is at position B.
is provided and engages with the rotating handle 30 to stop the rotation of the printing medium 4 at the illustrated position. Therefore, the remaining portion of approximately 135° is the friction clutch 14.
will slip.

Next, while proceeding to the C position, the printing material holder 3 rotates 90 degrees and the handle becomes in the S direction. At this time, the stopper 31 is retracted and does not hinder the movement to the C position. While the handle rotates 270 degrees from S to L at position C, the horizontal screen 32 moves in the direction of the arrow as shown in the figure to print the first color on the outer surface of the printing medium 4. The substrate then advances to position D, where the horizontal screen 33 also prints the second color. Since these screens 32 and 33 rise when rotating, collision with the printing medium 4 can be avoided.

At the next position E, a vertical screen 34 for printing the third color is provided, but for structural reasons this screen 34 can only be moved in the vertical direction. For this reason, it is impossible to rotate the printing material holder 3 counterclockwise and direct the handle toward the S direction at the E position as before, since interference between the screen 34 and the handle 30 will occur. When the printing material holder 3 advances from the D position to the E position, the electromagnetic clutch 19 is turned off and a predetermined number of pulses are sent to the pulse motor 28 to rotate the mouse holder 5 clockwise 180 degrees.
The printing medium 4, which has thus reached the E position, is rotated 270 degrees counterclockwise as before, and during this period, the third color is printed by the vertical screen 34. At this time, the electromagnetic clutch 19 is turned on again and the printing medium 4 is rotated by the planetary gear 7. When printing of the third color is finished, the handle 30 is in the L direction. Therefore, it is impossible to send the paper to the F position as it is because the handle 30 and the screen 34 interfere with each other. Then the electromagnetic clutch 19
is turned off, a predetermined number of pulses are sent to the pulse motor 28, and the printing material holder 3 is transferred to the F position while being rotated clockwise. At position F, the printing medium 4 is taken out onto the conveyor.

In the embodiments described above, the printing medium is rotated by 270 degrees at each position, but depending on the shape of the handle, the rotation angle may be 300 degrees or some other angle. This can be done by changing the angle of rotation of the sun gear 8.

(Effects of the Invention) As explained in detail above, the apparatus of the present invention has a driving means attached to the printing material holder independently of the planetary gear, and moves from a horizontal screen to a vertical screen when the rotary disk rotates. The driving means of the printing material holder is activated to rotate the printing material holder in a direction that avoids interference between the handle and the screen, so the three colors can be applied to the outer surface of the handle-equipped tip without being hindered by the handle. Can be screen printed.

Further, the apparatus of the present invention includes six planetary gears that are supported at equal intervals on a rotary disk that rotates intermittently and revolve around a sun gear, and a printing material holder that is coaxially attached to the planetary gears. When the rotary disk is stopped, the meshing of these gears rotates the printing material while printing, so the orientation of the printing material at each position is determined extremely accurately, resulting in beautiful three-color printing with no misalignment. Can print. Since the rotation angle of the printing medium at each position is less than 360°, interference between the handle and the screen is prevented.

In addition to the above, the device of the present invention is capable of extremely high-speed printing and has a small number of printing heads, since the feeding, positioning, printing and unloading of the printing material are completely automatic. Therefore, it is easy to exchange varieties.

As described above, the present invention solves the drawbacks of the prior art and greatly contributes to the glass container manufacturing industry.

[Brief explanation of the drawing]

FIG. 1 is a front view of the apparatus according to the embodiment, FIG. 2 is a right side view, and FIG. 3 is a central vertical sectional view of the main part. 2... Rotary disk, 3... Printing material holder, 4... Printing material, 5... Mouse holder, 6... Bottom holder, 7...
Planetary gear, 8...Sun gear, 14...Friction clutch,
19...Electromagnetic clutch, 28...Pulse motor, 30
...Handle, 31...Stopper, 32...Horizontal screen for first color, 33...Horizontal screen for second color, 34...Vertical screen for third color.

Claims (1)

[Scope of Claims] 1. Includes six planetary gears that are supported at equal intervals on a rotary disk that rotates intermittently and revolve around a sun gear, and a printing material holder that is attached coaxially with the planetary gears. , when the rotary disk stops, the substrate holder is
In a device that performs screen printing on the surface of a pot with a handle by rotating it by an angle of less than 360 degrees, horizontal screens are installed at two positions above the rotating disk, and one vertical screen is installed on the side of the rotating disk. At the same time, a driving means independent of the planetary gear is attached to the printing material holder, and the driving means of the printing material holder, which moves from the horizontal screen to the vertical screen when the rotary disk rotates, is operated, and the handle of the printing material A screen printing device, such as a tip with a handle, characterized by rotating a printing material holder in a direction to avoid interference with a vertical screen. 2. A screen printing device such as a pot with a handle according to claim 1, wherein the driving means is a pulse motor.