JPS6121832B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multicolor printing machine for making the printing effect the same at each printing position in multicolor printing of a bottle-shaped object such as a glass bottle.

Conventionally, when performing multicolor printing on a bottle-shaped object such as a round glass bottle, a rotating disk that rotates intermittently by 60 degrees in a fixed direction and six sets of covers that are rotatably installed around the rotating disk are used. A two-color printing machine comprising a printing material holder, six planetary gears coaxially provided with each printing material holder, and a sun gear that rotates alternately in forward and reverse directions while meshing with each planetary gear. A printing device is known as described in Japanese Patent Publication No. 45-30893, and in order to perform multi-color printing of three or four colors using a printing device for two-color printing, there is a method for printing on a printing material holder. A printing means in which printing screens are arranged in a vertical position and in two horizontal positions is known as described in Japanese Patent Publication No. 51-16806, and as a result, the printing screen can be printed in a fixed direction.
A rotating disk that rotates intermittently by 60 degrees, six sets of printing material holders rotatably installed around the rotating disk, and six planetary gears coaxially provided with each printing material holder. and a sun gear that rotates alternately in forward and reverse directions while meshing with each planetary gear, and the position is perpendicular to the printing material holder at the stop position of the rotating disk that rotates intermittently;
Multicolor printing presses have been proposed with printing screens arranged in more than one horizontal position.

However, in multicolor printing using the above-mentioned multicolor printing machine, there is no means to ensure that the printing medium and the printing screen always face each other at a fixed position.
This method has the disadvantage that a plurality of so-called printing seams remain on the product, detracting from the product value.

The present invention eliminates the above-mentioned drawbacks and maintains the same positional relationship between the printing screen and the printing material at all times,
The printing start part of the printing screen is placed in the same position on each printing screen, so even if the printing is complex, the printing will not be disturbed, and the printing seam will be in one place, allowing multi-color printing without detracting from the product value. The purpose is to provide opportunities.

In order to achieve the above object, the multicolor printing machine of the present invention includes a rotary disk that rotates intermittently in a fixed direction, a plurality of printing material holders rotatably provided around the rotary disk, It is equipped with a planetary gear provided on the same axis as each printing material holder, and a sun gear that rotates alternately in forward and reverse directions while meshing with each planetary gear, and a sun gear that rotates alternately in the forward and reverse directions while meshing with each planetary gear. In a multicolor printing machine in which a printing screen is arranged in a vertical position and in two horizontal positions with respect to a printing material holder, a clutch is provided between the printing material holder and the planetary gear for transmitting a torque of less than a specified value, A plurality of protrusions are formed on the circumference of the printing material holder, and pressing plates are provided at two horizontal positions of the printing screen so as to be able to approach and separate from the plurality of protrusions. .

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a multicolor printing press according to an embodiment of the present invention will be described in detail based on the drawings. In Figure 1, 1 is 60
It is a rotary disk that rotates intermittently by ゜ and has a horizontal axis 3.
2, and six sets of printing material holders 2 are arranged at equal intervals around the rotary disk 1.
In FIGS. 2 and 3, the printing material holder 2 includes a mouse holder 4 that tightens the opening of the printing material 3;
The mouse holder 4 is rotatably supported only by a bearing 6, but the bottom holder 5 is rotatably supported by a bearing 7 and longitudinally supported by a cam follower 33. Since it is supported so as to be able to slide in the direction, the printing medium 3 can be attached and detached. The spindle 8 of the bottom holder 5 is connected at the left end with a planetary gear 9, and there are six planetary gears 9 for each substrate holder 2, each of which is connected to the sun gear 1.
It is always meshing with 0.

As shown in FIG. 1, the sun gear 10 is rotated in forward and reverse directions via a drive gear 34 by a reciprocating rack 11. The rotation angle of the sun gear 10 is
It can be freely set by adjusting the eccentricity of the cam roller 13 that engages with the yoke 12 that drives the rack 11.

As shown in FIG. 3, the spindle 8 consists of an outer spindle sleeve 14 and an inner spindle shaft 15, and the spindle sleeve 14 is supported by a linear motion bearing 16 on a bearing 7 so as to be slidable in the longitudinal direction. but cannot be rotated. The spindle shaft 15 is rotatably supported inside the spindle sleeve 14 by a roller bearing 17 and a needle bearing 18. A planetary gear 9 is provided on the outer periphery of the left end of the spindle sleeve 14 via a ball bearing 19, and a roller wheel 28 is fixed with a key 29 to the left end of the spindle shaft 15, which is the drive side of the printing material holder 2. , four rollers 30 are attached to the circumference of the roller wheel 28 to form a plurality of protrusions.
As shown in FIG. 4, a press plate 31 is provided at a printing location horizontal to the printing material holder 2 and is movable vertically and horizontally so as to approach and separate from the roller foil 28. During horizontal movement of the turntable 1 between horizontal positions, the rotation of the sun gear 10 is prevented from being transmitted to the printing material holder 2.
A mechanism for preventing the rotation of the sun gear 10 from being transmitted to the printing material holder 2 is provided between the planetary gear 9 and the roller wheel 28, such as a friction clutch 35 for transmitting torque below a specified value. . That is, a clutch is provided between the printing material holder 2 and the planetary gear 9 for transmitting torque below a specified value.

Printing screen 3 as a means of printing on a curved surface
6 are provided at two horizontal positions and two vertical positions with respect to the printing material holder 2, and a ski plate 37 is attached to the printing screen 36 so that the screen surface is in contact with the printing material 3, As the printing medium 3 rotates, the printing screen 36 also moves in the lateral direction, and curved printing is applied to the outer peripheral surface of the printing medium 3. At the same time as printing is completed, the printing screen 36 returns to its original position and returns to its original position. It will be in a standby state.

Next, the operation of the multicolor printing press according to the embodiment of the present invention will be explained. The rotary disk 1 rotates intermittently by 60 degrees around the horizontal axis 32, and the rotary disk 1 rotates at a stop position A in FIG. The printing material 3 is placed in the printing material holder 2.
The printing screen 3 is installed in a vertical position at the next stop position B as the turntable 1 rotates.
At 6, as the planetary gear 9 rotates, the printing screen 36 also moves upward, and the ski plate 37
In order to bring the screen surface into contact with the printing material 3,
The outer peripheral surface of the printing medium 3 is printed in the first color, and the printing screens 36 are provided at two horizontal positions at the stop positions C and D. As the planetary gear 9 rotates, the printing screens 36 also move horizontally. Since the ski plate 37 brings the screen surface into contact with the printing material 3, the second and third colors are printed on the outer peripheral surface of the printing material 3 from the same position as the printing start position of the stop position B. , at the next stop position E, the print screen 36 moves downward as the planetary gear 9 rotates, and from the print start position similar to the stop positions B, C, and D. The fourth color is printed on the outer circumferential surface of the printing material 3, and the printing material 3 on which multicolor printing has been completed at the same printing start position at the stop position F is taken out, and each printing screen 36 is attached to the printing material 3. When printing is completed and the rotary disk 1 rotates, it returns to its original position and enters a printing standby state.

Each planetary gear 9 meshes with the sun gear 10 and revolves around the sun gear 10 while rotating, and the direction of the revolution is the same as the rotation direction of the rotary disk 1. The relationship between the planetary gear 9, the sun gear 10, and the rotary disk 1 is given by the following equation.

Rotation speed of planetary gear = {1 + (number of teeth of sun gear / number of teeth of planetary gear)} x (speed of rotation of intermittent rotary disk) - (number of teeth of sun gear / number of teeth of planetary gear) x (number of teeth of sun gear Rotation speed) It is necessary that the printing material 3 and each printing screen 36 always face each other during printing so that the position of the printing start portion of each printing screen 36 is the same. In principle, the planetary gear 9 rotates 90 degrees every time the stop position of the rotary disk 1 changes.

Therefore, let us assume that the number of teeth of sun gear 10 is 234,
The number of teeth of the planetary gear 9 is 36, and the rotation speed of the rotary disk 1 is
60/360, and the rotation speed of sun gear 10 is 55.38/36
If 0 is substituted into the above equation, the rotation speed of the planetary gear 9 will be 1/4. In other words, the planetary gear 9 rotates 90 degrees in the same direction as the rotary disk 1, the printing medium 3 always faces the printing screen 36, and the printing start portion of each printing screen 36 is positioned at the printing screen 36. The above will be the same.

However, when the printing medium 3 moves between the two printing screens 36 provided at two horizontal positions, that is, between the stop position C and the stop position D, the printing start part of the printing medium 3 remains as it is. It is necessary to maintain the For this reason, as shown in FIG.
Above 6 is a press plate 3 that can be moved vertically and horizontally.
1 is provided which locks the spindle shaft 15 by pressing on the roller 30 and prevents the rotation of the substrate 3 by the sun gear 10 and the planetary gear 9 by sliding the friction clutch 35, thereby locking the printing screen 36. The printing start portions of the printers are at the same location, so even if the printing marks are complicated, the printing will not be disturbed, and the printing seams will be in one location, so the product value will not be impaired.

When the printing position moves from C to D, the pressing plate 31 is moved laterally while maintaining the horizontal plane so as to maintain the same printing start position.

In addition, when the turntable 1 is stopped, the rack 1
1, the sun gear 10 is moved in the opposite direction to the above case.
When rotated by 55.38 degrees, the following formula: Planetary gear rotation speed = (Number of sun gear teeth/Number of planet gear teeth) x (Sun gear rotation speed) = (234/36) x {- (55.38/360)} =-1, the planet gear 9 will rotate by 360 degrees in the opposite direction to the rotation direction of the sun gear 10. During this rotation, that is, while the printing material holder 2 and the printing screen 36 are facing each other, printing on a curved surface such as a round bottle is performed.

As described above, the multicolor printing press of the present invention has the following features:
A rotating disk that rotates intermittently in a fixed direction, a plurality of printing material holders rotatably provided around the rotating disk, a planetary gear provided coaxially with each printing material holder, and each comprising a sun gear that rotates alternately in forward and reverse directions while meshing with a planetary gear, and disposing printing screens at two horizontal positions with respect to the printing medium holder at a stop position of the intermittently rotating rotary disk; A clutch is provided between the printing material holder and the planetary gear for transmitting torque below a specified value, a plurality of protrusions are formed on the circumference of the printing material holder, and two horizontal protrusions are formed on the circumference of the printing material holder. By providing a pressure plate at a position that can move toward and away from the plurality of protrusions, the two protrusions are pressed and fixed by the pressure of the press plate at two horizontal positions of the printing screen, and the printing target is fixed. Since the holder is held at a fixed angle and the clutch does not transmit the rotation of the planetary gear, it is possible to always maintain the same positional relationship between the printing screen and the printing material at each printing position when printing in multiple colors, such as on glass bottles. This allows the printing start part of the printing screen to be at the same position on each printing screen, and even with fairly complex printing marks, the printing will not be disturbed at each printing position, and the so-called printing seam will be aligned. It is effective in that it can be applied to only a few places and does not damage the product value.

[Brief explanation of the drawing]

FIG. 1 is a schematic front view of a multicolor printing press according to an embodiment of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a side sectional view of the main parts thereof, and FIG. 4 is a press plate and It is an enlarged front view of the vicinity. 1... Turntable, 2... Printing material holder, 3...
Printing material, 4...Mouse holder, 5...Bottom holder, 6, 7...Bearing, 8...Spindle, 9...
... Planet gear, 10 ... Sun gear, 11 ... Rack, 12 ... Yoke, 13 ... Cam roller, 14
... Spindle sleeve, 15 ... Spindle shaft, 16 ... Linear motion bearing,
17...Roller bearing, 18...Needle bearing, 19...Ball bearing, 28...
Roller foil, 29...key, 30...roller,
31... Pressing plate, 32... Horizontal shaft, 33... Cam follower, 34... Drive gear, 35... Friction clutch, 36... Printing screen, 37... Skip plate.

Claims (1)

[Claims] 1. A rotary disk that rotates intermittently in a fixed direction, a plurality of printing material holders rotatably provided around the rotating disk, and a planetary gear provided coaxially with each printing material holder; It is equipped with a sun gear that rotates alternately in forward and reverse directions while meshing with each planetary gear, and print screens are arranged at two horizontal positions with respect to the printing material holder at the stop position of the rotating disk that rotates intermittently. In the multicolor printing machine, a clutch is provided between the printing material holder and the planetary gear to transmit a torque of less than a specified value, and a plurality of protrusions are formed on the circumference of the printing material holder,
A multicolor printing machine characterized in that pressing plates are provided at two horizontal positions of the printing screen so as to be able to approach and separate from the plurality of protrusions.