KR20040004317A - Screen printer having a single driving device - Google Patents

Abstract

PURPOSE: A screen printing device is provided to reduce manufacturing cost of the screen printing device by driving a printing unit and a screen using a single driving power generating unit. CONSTITUTION: A screen printing device has a driving section(40). The driving section(40) includes a cam unit(50), a power transmission unit, and a power generating unit(90). The cam unit(50) includes driving shafts, which are rotatably coupled to the frame(10). Both ends of the cam unit(50) are coupled with a printing unit(20) and a screen(30) so as to reciprocate the printing unit(20) and rotate the screen(30). The power transmission unit is connected to each of the driving shafts of the cam unit(50) so as to drive the cam unit(50). The power generating unit(90) transfers power to the power transmission unit.

Description

Screen printer having a single driving device

The present invention relates to a screen printing apparatus having a single power generating mechanism, and in particular, a left and right reciprocating drive for injecting ink to an object, and a flow of a screen for passing / blocking injected ink to a single device. Simultaneously performed by the power generating mechanism, it is possible to reduce the manufacturing time and significantly reduce the manufacturing cost of the product.

Screen printing is provided with a screen on which a desired logo or pattern is formed on the upper portion of a printing object (hereinafter, the workpiece), and sprays a printing ink on the upper portion of the screen to print the desired logo or pattern on the surface of the workpiece.

Due to this, a printing apparatus for performing screen printing includes a frame, a jig on which a workpiece is placed at a printing performing position on the frame, a printing performing mechanism installed on the upper frame of the jig so as to be reciprocated left and right, and the printing. It has a basic configuration consisting of a screen that is installed in the frame portion between the execution mechanism and the workpiece to block / pass the ink ejected.

Looking at the configuration driven in the conventional printing apparatus described above, once a means for reciprocating the printing execution mechanism to the left and right is required, the screen is moved close to the workpiece side before printing, or the screen is returned to its original position after printing is completed. Means for returning are required.

In such a screen printing apparatus, when an operator mounts a workpiece on a jig and power is applied to the apparatus, the screen is first moved close to the workpiece side, and then the printing execution mechanism is moved in one direction (usually from left to right). The ink will be sprayed to the printing ink.

At this time, a cylinder is applied as a means for moving the printing performing mechanism, and a means such as a motor for moving the screen up and down to form a hinge configuration on one side of the screen to rotate the hinge configuration up and down. Power mechanism is applied.

Thereafter, upon completion of printing on the workpiece, the cylinder returns the printing execution mechanism to the original position, and at the same time, the rotating power mechanism also returns the screen to the original position, and then the operator takes out the workpiece from the jig and prints it. You will complete the process.

In the conventional screen printing apparatus described above, a cylinder for moving the printing execution mechanism and a rotating power mechanism for moving the screen are independently installed on the frame, thereby increasing the overall manufacturing cost of the apparatus.

That is, the cylinder is accompanied by equipment such as a compressor for generating a driving force, and is treated as a very expensive equipment in itself, and when the equipment is placed in the vicinity of the printing apparatus, there is a space for printing. It is so wide that disadvantageous problems arise in the utilization of space in the workplace.

In addition, when the cylinder and the rotational power mechanism are independently installed as described above, a control program (controller that performs the algorithm) for controlling their dual drive is made intricately, and its maintenance is inconvenient in case of failure or periodic inspection. The problem is exposed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and the screen printing apparatus comprising a lower cost component and a drive for moving the printing execution mechanism and a drive for moving the screen are performed by a single power generation mechanism. The purpose is to provide.

1 is a perspective view of a screen printing apparatus according to the present invention.

2 is a front view of the screen printing apparatus of FIG.

3 is a cross-sectional view of a configuration in which the cam unit of the screen printing apparatus of FIG.

Figure 4a is a front view of the workpiece supply step of driving the screen printing apparatus of Figure 1;

4B is a front view of a printing step in the driving state of the screen printing apparatus of FIG. 1;

<Explanation of symbols for the main parts of the drawings>

10: frame 20: printing performing mechanism

30: screen 40: power mechanism part

50: cam unit 60: link mechanism

70: cam member 80: power transmission mechanism

90: motor

In order to achieve the above object, the present invention has the following features.

The present invention, the frame is equipped with a jig is mounted on the bottom of the jig, a printing execution mechanism for reciprocating left and right from the top of the frame to eject ink, and one side is hinged to the frame to the workpiece side Proximity movement or home position return is a screen printing apparatus comprising a screen, a printing performing mechanism and a power mechanism unit installed on a frame to move the screen.

The power mechanism, the drive shaft is rotatably installed on one side of the frame coupled to the printing execution mechanism and the screen, each side is fixedly installed on these drive shafts, each end is coupled to the printing execution mechanism and the screen, the printing execution A cam unit for reciprocating the mechanism and rotating the screen up and down; A power transmission mechanism coupled to each drive shaft of the cam unit to simultaneously drive each cam unit by transmitted power; installed on the frame to generate rotational power, and transmitting the generated power to the power transmission mechanism. It is characterized by consisting of a power generating mechanism.

The cam unit may include: a link mechanism coupled to one side end of the rotary lever to the drive shaft and rotated together with the drive shaft, the both ends of the connecting rod being hinged to the rotary lever and the print execution mechanism to reciprocate the print execution mechanism; A cam member coupled to the drive shaft rotated together with the drive shaft of the link mechanism, the outer surface is in contact with the screen support for supporting the screen is made of a cam member for approaching / spaced apart the screen to the workpiece by a cam diagram formed on the outer surface .

Hereinafter, embodiments of the present invention to which the above features are applied will be described in detail with reference to the accompanying drawings.

1 is a perspective view of an overall configuration of a screen printing apparatus according to the present invention, FIG. 2 is a front view of the screen printing apparatus of FIG. 1, and FIG. 3 is a cross-sectional view of a configuration in which power is transmitted from the screen printing apparatus of FIG. 1.

Referring to these drawings, the screen printing apparatus according to the present invention is composed of a frame 10, a printing performing mechanism 20, a screen 30, and a power mechanism 40.

The frame 10 provides a space in which each component for screen printing is to be installed, and a mounting table mounted on the upper body of the body 11 and the upper surface of the body 11 to support the apparatus. 12).

In addition, a jig 2 for mounting the work piece 1 is installed on a substantially lower front surface of the body, and the jig 2 is movable to a mounting position and a work position for mounting the work piece 1. It is installed in combination with an internal transport mechanism (for example, a cylinder, not shown).

The printing performing mechanism 20 is installed on the front of the mounting table 12 of the frame 10, the moving plate on the rail 21 horizontally installed in a pair of two on the front of the mounting table 12 to reciprocate left and right ( 22 is coupled to the front surface of the movable plate 22, and the nozzle mechanism 23 for ejecting the ink and the ink ejected on the screen 30 to sweep to one side.

Here, after the nozzle mechanism 23 receives ink through an external ink tank (not shown), the nozzle may include a solenoid valve or other control means for injecting ink only when printing is performed. By moving and blocking the ink ejection, more specific technical information is due to the well-known issue since such a nozzle mechanism 23 is released as one already assembled product.

The screen 30 is formed through the upper and lower surfaces of the screen support 31 in order to maintain a stable state of fixing the logo or various patterns to be printed on the workpiece 1, the lower side of the mounting table (12) It is fitted to the holder 32 and installed.

The screen support 31 is installed so that the end portion is hinged to the lower end side of the iron rod 12 between the printing execution mechanism 20 and the jig 2 so as to rotate in an angle, and the holder 32 is perpendicular to the longitudinal direction. Coupled to protrude forward.

The power mechanism 40 has a cam unit 50 and a cam unit 50 installed on one side and a lower side of the iron rod 12 on which the printing support mechanism 20 and the screen support 31 on which the screen 30 is held are installed. It is composed of a power transmission mechanism 80 for transmitting power to the motor, a motor 90 is a rotational power mechanism for providing power to the power transmission mechanism (80).

The cam unit 50 has a drive shaft (51, 52) is coupled to the iron rod 12, respectively, the link mechanism 60 and the cam member 70 is coupled to each of the drive shaft (51, 52) is configured .

The link mechanism 60 is connected to the rotary lever 61 which is rotated at the same time as the rotation of the drive shaft 51 and the movable plate 22 of the printing execution mechanism 20 by the rotation of the rotary lever 61. It is composed of a rod 62, the connecting rod 62 is composed of both ends hinged to the rotary lever 61 and the movable plate 22, respectively.

In addition, the rotary lever 61 has a slit 63 formed in the longitudinal direction in the portion coupled with the drive shaft 51, the drive shaft 51 is detachably coupled through the slit 63 (for example Bolts, nuts, etc.) and the radius adjusting portion 64 to adjust the radius of the rotation lever 62 is rotated.

In addition, the connecting rod 62 is formed with a turnbuckle-shaped length adjusting portion 65, by operating the radius adjusting portion 64 and the length adjusting portion 65 of the printing performing mechanism 20 The moving plate 22 can be set by adjusting the length of the reciprocating movement.

The cam member 70 is eccentrically mounted to one side from the center of the drive shaft 52, and maintains the upper surface of the screen support 31 in contact with the outer surface, the screen support 31 is always a cam member In order to maintain contact with the 70, the screen support 31 and the tension spring 12 includes a tension spring 71 which is an elastic member fixedly supported at both ends.

Here, the cam member 70 has the screen 30 (more precisely the screen support) close to the work piece 1 in response to an operation in which the printing execution mechanism 20 reciprocates left and right to perform printing and return. A cam diagram of each section for maintaining / returning the proximity state is formed on the outer surface.

The power transmission mechanism 80 has pulleys 81 mounted on the rotating shaft of the motor 90 and the driving shafts 51 and 52 of the cam unit 50, respectively, and the belts 82 are attached to the pulleys 81, respectively. In combination, the rotational power of the motor 90 is configured to be transmitted to each of the drive shafts 51 and 52.

Here, the belt 82 and the pulley 81 are equally replaceable by a power transmission configuration such as a chain, a sprocket or a rope, a drum, and preferably a rack inside the belt 82 to perform more accurate power transmission. A gear tooth shape of the shape is formed, and the outer surface of the pulley 81 is formed in a shape corresponding thereto.

In addition, each of the drive shafts 51 and 52 of the cam unit 50 may set different specifications (diameters) of the pulleys 82 to accelerate / decelerate the drive shafts 51 and 52. Naturally, the bearings 83 are mounted on the driving shafts 51 and 52 that are rotated so as to maintain smooth driving.

4 is a front view showing a printing apparatus driving state of the above-described configuration.

The operator mounts the workpiece 1 on the jig 2 to perform a printing operation. In the workpiece supply step, the printing execution mechanism 20 is located on the left side of the drawing as shown in FIG. The screen 30 is maintained at a constant distance from the workpiece 1.

In this state, when the operator turns on the power of the printing apparatus, the motor 90 is driven so that each drive shaft 51, 52 is rotated by receiving power by the power transmission mechanism 80 as shown in FIG. 4B. .

When the drive shaft 51 is rotated, the link mechanism 60 and the cam member 70 are driven at the same time, and as the rotary lever 61 of the link mechanism 60 is rotated, the connecting rod 62 prints the mechanism 20. ) Is moved to the right in the drawing, at this time, the nozzle mechanism 23 of the printing performing mechanism 20 is to spray the ink to the workpiece (1) through the screen (30).

Here, the cam member 70 immediately rotates the screen support 31 so that the screen 30 is close to the workpiece 1 before the printing execution mechanism 20 is moved and the ink is ejected. The position of the screen support 31 can be kept stationary until the movement of the mechanism 20 (movement for ejecting ink) is completed.

This is a conventional action implemented by a cam diagram formed on the outer surface of the cam member 70, and in this state, the cam member 70 is maintained by the drive shaft 52.

When the process of printing on the workpiece 1 is completed as described above, the connecting rod 62 moves the print performing mechanism 20 back to the left side by the rotating drive shaft 51, and at the same time, the cam member. 70 is also rotated so that the screen 30 returns to the upper side to maintain the initial state as shown in FIG. 4A.

At this time, the return of the screen 30 is performed by the tension spring 71 coupled between the screen support 31 and the mounting table 12, the nozzle mechanism 23 of the printing execution mechanism 20 is the ink It is kept blocked so as not to spray.

As described above, in the present invention, the movement of the printing execution mechanism and the position movement of the screen are performed by a single power generating mechanism, thereby lowering the manufacturing cost of the entire printing apparatus, and the external equipment for generating the driving force is provided. It is not required to obtain the effect of making the space utilization in the workplace more advantageous.

In addition, the present invention, the dual drive is performed by the cam unit at the same time to obtain the effect of simplifying the program for performing the printing process and thereby the maintenance is simplified.

Claims (5)

The frame 10 is mounted with a jig (2) on which the workpiece is mounted, a print performing mechanism (20) for reciprocating left and right from the top of the frame (10) and spraying ink, and one side of the frame (10). Hinged to the workpiece side to move or return to the home side is provided with a screen 30, the power mechanism 40 is installed on the frame 10 to move the print performing mechanism 20 and the screen 30, In a standing screen printing apparatus, The power mechanism 40 is The driving shafts 51 and 52 are rotatably installed on one side of the frame 10 to which the printing execution mechanism 20 and the screen 30 are coupled, respectively, and one side of each of the driving shafts 51 and 52 is fixedly installed. An end portion of the cam unit 50 coupled to the print performing mechanism 20 and the screen 30 to reciprocate the print performing mechanism 20 and rotate the screen 30 up and down; A power transmission mechanism (80) coupled to each drive shaft (51, 52) of the cam unit (50) and simultaneously driving each cam unit (50) by the transmitted power; Screen printing apparatus having a single power generating mechanism, characterized in that made of a power generating mechanism (90) installed on the frame (10) to generate rotational power, and transfer the generated power to the power transmission mechanism (80). The method of claim 1, wherein the cam unit 50 One end of the rotary lever 61 is coupled to the drive shaft 51 to rotate together with the drive shaft 51, and both ends of the connecting rod 62 are hinged to the rotary lever 61 and the printing execution mechanism 20, respectively. A link mechanism 60 for reciprocating the print performing mechanism 20; It is coupled to the drive shaft 52 which is rotated together with the drive shaft 51 of the link mechanism 60, the outer surface is in contact with the screen support 31 for supporting the screen 30 by the cam diagram formed on the outer surface ( 30. A screen printing apparatus having a single power generating mechanism, characterized in that it is made of a cam member (70) for proximate / separating the workpiece (1) to the workpiece (1). The method of claim 2, wherein the link mechanism 60 The slit 63 is formed on the rotary lever 61 to which the drive shaft 51 is coupled to adjust the moving distance of the printing execution mechanism 20, and the drive shaft 51 and the rotary lever 61 in the slit 63. The screen printing apparatus having a single power generating mechanism is characterized in that the detachably coupled to each other is configured with a radius adjusting portion (64). The method of claim 2, wherein the link mechanism 60 Screen printing apparatus having a single power generating mechanism, characterized in that the length adjustment portion 65 of the form of a turnbuckle on the connecting rod 62 to adjust the moving distance of the printing performing mechanism (20). 3. The cam member (70) of claim 2, wherein the cam member (70) Both ends are coupled to the screen support 31 supporting the frame 10 and the screen 30, respectively, and include an elastic member 71 for returning the screen 30 moved by the cam member 70. Screen printing apparatus having a single power generating mechanism.