JP2003341012A - Screen printing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To smoothly move a squeegee to right and left at the same time. <P>SOLUTION: Racks 403 and 404 are provided and gears 405 and 406 are engaged therewith. The gears 405 and 406 are fixed to a fulcrum shaft 400 and, even when a stroke part 116 is driven on a single side by a motor 410 and a slide shaft 409, drive force is applied to the stroke part 116 from the left and right. By this constitution, left and right movement wobble is eliminated to smoothly move a squeegee 111. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen printing machine. In particular, it relates to smooth movement of the squeegee.

[0002]

2. Description of the Related Art FIG. 8 is a schematic view of a conventional screen printing machine. FIG. 9 is a front view of the screen printing machine.
FIG. 10 is a plan view of the screen printing machine.

The screen printing machine 101 has a base 102. The base 102 includes a table 103 and a printing unit 1.
It is equipped with 09. The table 103 is attached so as to be movable in the directions of arrows K1 and K2 along the base 102. The table 103 mounts a work 110 (for example, a substrate), and moves the work 110 to the printing unit 109. The printing unit 109 prints on the work 110. The operation box 105 is provided on the side surface of the base 102 and has various switches 106 used by an operator. In the printing unit 109, the screen printing plate 200 is attached to the printer base 108. The screen engraving 200 includes a screen frame 211 and a screen mesh 201 having a print image. The stroke portion 116 is movably attached to the printer base 108. The printer base 108 controls the movement of the stroke portion 116, and while the squeegee 111 applies a printing pressure suitable for screen printing to the screen mesh 201, an arrow C1 is formed along the surface of the screen mesh 201 at a speed suitable for screen printing. , C2 are controlled to move.

In FIG. 11, the stroke portion 116 is indicated by an arrow C.
It is a figure which shows the structure which moves to the C1 direction. The motor 410 rotates the slide shaft 409 in the directions of arrows M1 and M2. The slide shaft 409 has gears 261 and 26.
2 is fixed. The belts 250 and 251 are engaged with the gears 261 and 262, and the belts 250 and 25
With the movement of 1, the stroke portion 116 can move in the directions of arrows C1 and C2. In the case of adopting such a configuration, there is a drawback that the vibration due to the movement of the belts 250 and 251 is transmitted to the stroke portion 116, and the screen printing cannot be performed accurately.

FIG. 12 is a diagram showing another structure for moving the stroke portion 116. The rotation of the motor 410 causes the slide shaft 409 to rotate in the directions of arrows M1 and M2. The slide shaft engaging portion 411 converts rotational movement of the slide shaft 409 in the directions of the arrows M1 and M2 into linear movement in the directions of the arrows C1 and C2. The stroke portion 116 is the rail 40.
1 and the rail 402 guides and moves. In such a configuration, the stroke portion 116 is applied with a moving force with respect to the left portion L, and the right portion R follows the left portion L and moves. Therefore, for example, when the left part L moves in the C1 direction, the right part R moves in the C1 direction with a delay, and the left part L is originally supposed to move.
Although the right part R and the right part R should move at the same time, a left-right difference occurs. Alternatively, when the right part R starts to advance with a delay, the right part R advances ahead of the left part L due to the reaction, and the left part L advances further due to the reaction, such that the left part L moves during the movement. There is a problem that the right part R and the right part R shift while moving alternately.

FIG. 13 is an improvement of the drawback of the configuration shown in FIG. While the stroke portion 116 has the width U in FIG. 12 described above, the stroke portion 116 has the width V (width U <width V) in FIG. 13. As described above, by increasing the width of the stroke portion 116, the left portion L and the right portion R are simultaneously moved to the rail 40.
It becomes possible to slide 1,402. But,
When the width of the stroke portion 116 is increased as shown in FIG. 13, there is a disadvantage that the depth of the entire device becomes long. Compared with the depth W1 in the case of FIG.
The depth W2 of is increased.

FIG. 14 is a diagram showing a structure in which the stroke portion 116 is moved and the stroke portion 116 is rotated in the directions of arrows A1 and A2. It is inconvenient to attach or detach the squeegee 111 to the stroke portion 116 shown in FIGS. 11 to 13. Therefore, in FIG.
As shown in, the stroke portion 116 can be rotated about the fulcrum shaft 400 to easily attach or detach the squeegee 111. FIG. 15 is a side view of the stroke portion 116 shown in FIG. The squeegee 111 is held by the squeegee holder 120. The scraper 311 is held by the scraper holder 320. Further, the squeegee holder 120 and the scraper holder 320 are attached to the stroke portion 116 so as to be vertically movable by an air cylinder (not shown). The stroke portion 116 can rotate about the fulcrum shaft 400 in the directions of arrows A1 and A2. By rotating the stroke part 116 in the direction of the arrow A1, the squeegee 111 and the scraper 311 can be easily attached to and detached from the squeegee holder 120 and the scraper holder 320. In the screen printing machine having such a structure, the fulcrum shaft 400 is used to move the stroke portion 116 in the directions of the arrows C1 and C2. Since the stroke portion 116 is moved using the fulcrum shaft 400, as shown in FIG. 13, even if the width of the stroke portion 116 is increased, the left portion L and the right portion R do not move at the same time, and blurring occurs. There is a possibility that it will end up.

[0008]

However, the movement of the squeegee of the conventional screen printing machine may not be smoothly performed due to the transmission of vibration of the belt or the left and right movements not being synchronized. there were. Especially fulcrum axis 4
If the stroke portion 116 is rotated using 00, the work advantage that the squeegee and scraper can be easily replaced can be obtained, but the stroke portion 11
When moving 6 smoothly, there was a problem that blurring might occur.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a screen printer capable of smoothly and accurately conveying a squeegee. Another object of the present invention is to provide a screen printing machine in which the squeegee and scraper can be easily replaced and the squeegee and scraper can be transported smoothly.

[0010]

A screen printing machine according to the present invention, in a screen printing machine using a squeegee, is capable of moving in a screen printing direction with respect to a printer base serving as a printing base. A stroke part attached to the squeegee, first and second racks provided on the printer base and extending in the screen printing direction, and first and second racks provided on the stroke part. And first and second gears that engage with and rotate in synchronization with each other, and a drive unit that reciprocates the stroke portion in the screen printing direction with respect to the printer base.

The stroke portion has a fulcrum shaft straddling the first and second racks, and the first and second gears are
A gear having the same diameter and the same number of teeth is fixed to the end of the fulcrum shaft.

The screen printing machine is further provided on the printer base, first and second rails extending in the screen printing direction, and provided on both ends of the stroke portion, and the first and second rails. It is characterized by including first and second sliders guided by rails.

The drive unit is provided with a motor, a slide shaft that is rotated by the motor and extends in the screen printing direction, and is engaged with the slide shaft that is present in the first slider, and reciprocates the rotational movement of the slide shaft. And a slide shaft engaging portion for converting into motion.

The first rack is formed on the first rail, and the second rack is formed on the second rail.

The first and second sliders rotatably hold the fulcrum shaft, and the stroke portion has
It is characterized in that it is attached so as to be rotatable around the fulcrum shaft.

The drive section is a motor provided in the stroke section, and is equipped with a motor for rotating the fulcrum shaft.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. FIG. 1 is a diagram showing a configuration of a printing unit 109 of the screen printing machine according to the present invention. FIG. 1 shows an internal configuration excluding the printer base 108. The difference from the previously described FIG. 14 is that racks 403 and 404 are added. Also,
The point is that gears 405 and 406 that engage with the racks 403 and 404 are added. Slide shaft 409, motor 4
10. The slide shaft engaging portion 411 operates in the same manner as the conventional one. The gears 405 and 406 are gears having the same diameter and the same number of teeth, and are fixed to the fulcrum shaft 400. Therefore, the gear 40
When 5 rotates, gear 406 also rotates by the same angle in synchronization. The racks 403 and 404 are straight racks or helical racks fixed to both ends of the printer base 108 (not shown) so as to be parallel to the screen printing direction, and engage with the teeth of the gears 405 and 406. A plurality of teeth of the same shape that are carved at equal intervals are carved. The rotation of the slide shaft 409 moves the slider 407 including the slide shaft engaging portion 411 in the directions of arrows C1 and C2. As a result of this movement, the gears 405 move toward the arrows E1 and E2.
Rotate in the direction. In synchronization with the rotation of the gear 405 in the directions of the arrows E1 and E2, the gear 406 also rotates in the directions of the arrows F1 and F2 by the same angle. The rotation of the gears 405 and 406 causes the fulcrum shaft 400 to move the racks 403 and 404 at equal distances in the directions of the arrows C1 and C2. This movement is guided by rails 401 and 402 and sliders 407 and 408. As a result, the stroke portion 116 obtains driving force from both sides of the left portion L and the right portion R at the same time, and the arrow C1,
Move in the C2 direction. In this way, the stroke part 1
16 can be moved smoothly and accurately. In the conventional movement of the stroke portion 116, a driving force is applied only from one end of the stroke portion, and the other end follows the movement, so that a left-right movement occurs. According to the invention, since the driving force is applied from both the left and right sides at the same time, the movement of the stroke portion 116 can be smoothly performed without the lateral movement.

FIG. 2 is a detailed partial sectional view of the structure shown in FIG. 1 as seen from the YY direction. FIG. 3 is a detailed partial cross-sectional view of the configuration shown in FIG. 1 viewed from the ZZ direction. Figure 4
[Fig. 2] is a detailed partial cross-sectional view of the configuration shown in Fig. 1 as seen from the XX direction.

The rail 4 is attached to the printer base 108.
01, 402 and racks 403, 404 are fixed. For the rails 401 and 402, the sliders 407,
408 is slidably mounted. The fulcrum shaft 400 is rotatably attached to the sliders 407 and 408 via slider bearings 413 and 414. The stroke part 116 is rotatably attached to the fulcrum shaft 400 via the stroke part bearings 415 and 416. This rotation is performed by the opening / closing handle 90.
By inputting 0, the operation is performed in the directions of arrows A1 and A2. Gas shocks 451 and 452 are attached to assist the rotation of the stroke portion by this input. The fulcrum 455 of the gas shock 451 is attached to the slider bearing 413, and the fulcrum 456 is attached to the stroke part 116.

In FIG. 4, the stroke portion 116 is moved by the opening / closing handle 900 by using the gas shock 451 as indicated by the arrow A1.
2 shows two states rotated in the A2 direction. As shown in FIG. 4, when the stroke part 116 is pulled up in the direction of the arrow A1, the squeegee 111 and the scraper 311 are removed.
Can be easily attached and detached. Air cylinder 601,
Reference numeral 602 is for moving the squeegee holder 120 and the scraper holder 320 up and down. Lock pin 45
Reference numeral 3454 denotes a slider 4 for rotating the stroke portion 116.
It is for locking to 07,408. The slide shaft engaging portion 411 engages with the slide shaft 409 and converts the rotational movement of the slide shaft 409 into a linear movement. A rotary liner can be used as an example of the slide shaft engaging portion 411. Slide shaft engaging part 4
11 is fixed to the slider 407. Therefore, the linear motion of the slide shaft engaging portion 411 is transmitted to the slider 407, the linear motion of the slider 407 is transmitted to the fulcrum shaft 400, and the gears 405 and 406 are further rotated. The mounting position of the slide shaft engaging portion 411 is right above the rail 401, and the movement of the slide shaft engaging portion 411 is the rail 4
It is structured so that it can be directly guided by 01. The positions of the gears 405 and 406 are the same as those of the fulcrum shaft 400.
Of the rails 401 and 402 on both sides. In this way, the gear 40 that generates the driving force
Since 5,406 is at the end, the stroke portion 1
16 movements can be performed more smoothly.

Embodiment 2. FIG. 5 is a diagram showing another example of the present invention. In FIG. 5, the rails 401 and 402 shown in FIG. 1 are omitted. Thus, even if the rails 401 and 402 are omitted, the gear 40
Since the stroke portions 116 move right and left simultaneously and smoothly by the driving force of 5,406, no problem occurs.
If the rails 401 and 402 are omitted,
As shown in (b), the gear 405 may be a gear having a U-shaped groove in cross section. Alternatively, as shown in (c), the rack 403 may be a rack having a groove having a U-shaped cross section.

Embodiment 3. FIG. 6 is a diagram showing another example of the present invention. 6 differs from FIG. 1 in that the motor 4
The point 10 is built in the stroke part 116. By directly connecting the rotating shaft of the motor 410 to the fulcrum shaft 400, the driving force of the motor 410 is directly transmitted to the gears 405 and 406, and the stroke portion 116 can move smoothly. The motor 410 does not rotate the stroke part 116 in the directions of arrows A1 and A2. When it is desired to reduce the weight of the stroke portion 116, the form as shown in FIG. 1 is preferable. However, if there is no effect even if the weight of the stroke portion 116 becomes heavy, the motor 410 is built in the stroke portion 116. It doesn't matter.

Fourth Embodiment FIG. 7 is a diagram showing another example of the present invention. FIG. 7 shows a case where the present invention is applied to FIG. 12 shown in the conventional example. That is, FIG.
Racks 403, 404 and gears 4 are added to the configuration shown in FIG.
The feature is that 05, 406 and the fulcrum axis 400 are added. It is possible to move left and right simultaneously without increasing the width of the stroke part. Therefore, it is not necessary to increase the depth of the device. As described above, the present invention has a feature that the effect can be exhibited only by adding simple parts to the conventional configuration.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a printing unit of a screen printing machine according to the present invention.

FIG. 2 is a detailed partial cross-sectional view taken along line YY of FIG.

FIG. 3 is a detailed partial sectional view taken along line ZZ of FIG.

FIG. 4 is a detailed partial sectional view taken along line XX of FIG.

FIG. 5 is a diagram showing another example of the present invention.

FIG. 6 is a diagram showing another example of the present invention.

FIG. 7 is a diagram showing another example of the present invention.

FIG. 8 is a perspective view of a conventional screen printing machine.

FIG. 9 is a front view of a conventional screen printing machine.

FIG. 10 is a plan view of a conventional screen printing machine.

FIG. 11 is a diagram showing a configuration of a printing unit of a conventional screen printing machine.

FIG. 12 is a diagram showing a configuration of a printing unit of a conventional screen printing machine.

FIG. 13 is a diagram showing a configuration of a printing unit of a conventional screen printing machine.

FIG. 14 is a diagram showing a configuration of a printing unit of a conventional screen printing machine.

15 is a partial cross-sectional view taken along line XX of FIG.

[Explanation of symbols]

111 squeegee, 116 stroke part, 400 fulcrum shaft, 401, 402 rail, 403, 404 rack, 405, 406 gear, 407, 408 slider,
409 slide shaft, 410 motor, 411 slide shaft engaging portion, 413, 414 slider bearing, 41
5,416 Stroke bearings, 451 and 452 gas shocks, 453 and 454 lock pins, 455 and 4
56 fulcrum, 601,602 air cylinder.

Claims (4)

[Claims] 1. A screen printing machine using a squeegee, comprising: a printer base that serves as a printing base; and a stroke part that is movably attached to the printer base in the screen printing direction and has the squeegee attached. The screen printing machine is characterized in that the stroke portion has a fulcrum shaft and is rotatably attached about the fulcrum shaft. 2. In a screen printing machine using a squeegee, a printer base that serves as a printing base, a stroke portion that is movably attached to the printer base in the screen printing direction, and has the squeegee attached, The printer base is provided with first and second rails extending in the screen printing direction, and the stroke portion has a fulcrum shaft extending from the first rail side to the second rail side. The screen printing machine is characterized in that the stroke portion is attached so as to be rotatable around the fulcrum shaft. 3. A screen printing machine using a squeegee, comprising: a printer base that serves as a printing base; and a stroke part that is movably attached to the printer base in the screen printing direction and has the squeegee attached. A screen printing machine characterized in that the stroke portion has a fulcrum shaft extending to both sides of the stroke portion, and the stroke portion is rotatably attached around the fulcrum shaft. 4. A screen printing machine using a squeegee, comprising: a printer base that serves as a printing base; and a stroke portion that is movably attached to the printer base in the screen printing direction and has the squeegee attached. The stroke portion has a fulcrum shaft extending in a direction perpendicular to the screen printing direction, and the stroke portion is rotatably attached about the fulcrum shaft.