JPH0219232Y2 - - Google Patents

Description

[Detailed description of the invention] Technical field and purpose This invention relates to a pressure regulator for a squeegee in a screen printing machine, and its purpose is to adjust the vertical position of the squeegee and the pressure force by operating one manual operation part. It is an object of the present invention to provide a new pressurizing force adjustment device for a squeegee that can be easily adjusted.

Structure of the invention In order to achieve the above-mentioned object, this invention includes a moving guide member supported on the machine frame of a screen printing machine, and a moving guide member supported by the moving guide member that can be moved freely in both directions of pressure contact and separation based on manual operation. an adjustment member whose position is adjusted by being moved to a position; a squeegee support member that is connected to the adjustment member so as to be relatively movable along both directions and partially supports the squeegee; this squeegee support member and the adjustment member and a biasing member interposed between the squeegee support member and the adjustment member for biasing the squeegee support member in the pressure contact direction, and a biasing member interposed between the squeegee support member and the adjustment member that biases the biasing member when the squeegee is separated from the screen plate. and a locking member for stopping the movement of the squeegee support member in the pressing direction at a predetermined position based on the action.

Embodiment Hereinafter, an embodiment embodying this invention will be described based on the drawings.

First, to roughly explain the configuration of the screen printing machine according to Fig. 1, the machine stand 1 of the screen printing machine
A square frame-shaped opening/closing frame 3 is rotatably supported on a shaft 2 provided on the rear end, and is driven to open and close up and down via a crank arm 10 by a motor (not shown) installed in the machine base 1. be done. A plate frame 4 is arranged parallel to the lower side of the opening/closing frame 3, and a screen plate 5 is removably supported inside the frame frame 4.

Furthermore, inside the opening/closing frame 3, a squeegee 6 and a doctor 7 are supported so as to extend left and right, respectively, by a support structure described later, and are reciprocated back and forth by a servo motor 8 installed on the base end of the opening/closing frame 3. Ru. During printing, the opening/closing frame 3 is placed in a horizontal position, as shown by the solid line in FIG. After placing the ink on the screen plate 5 on the printing material (not shown) on the print base 9, the squeegee 6
is separated upward from the screen version 5 and the doctor 7
is lowered, and the doctor 7 slides forward to perform ink return.

Next, the support structure of the squeegee and doctor which switchably support the squeegee 6 and doctor 7, respectively, will be explained.

As shown in FIGS. 2 to 4, sliders 12 are arranged inside the left and right side frames 11 of the opening/closing frame 3, and the sliders 12 are arranged inside the left and right side frames 11 of the opening/closing frame 3. The servo motor 8 reciprocates back and forth along the inner surface of the side frame 11. A support shaft 14 is rotatably supported between the left and right sliders 12, and a switching lever 15 is fixed to both ends of the support shaft 14. A front lifting plate 16 and a rear lifting plate 17 that extend vertically are supported at both ends of these switching levers 15, respectively, and a switching lever (not shown) installed inside the slider 12 is connected to a connecting pin 18 provided on the outer surface of these plates. connected to the mechanism. and,
In one side frame 11, the drive chain 13
The switching mechanism is actuated by the switching drive device 20 installed on the base end of the opening/closing frame 3 through the switching chain 19 (see FIG. 3) arranged inside the opening/closing frame 3, so that both the front and rear lifting plates 16 , 17 can be moved up and down in different directions.

A pair of left and right squeegee pressure regulators 43 extending vertically are fixed to the inside of the lower ends of the left and right front lifting plates 16 via spacers 42, and the same is fixed to the inside of the lower ends of the left and right rear lifting plates 17. A pair of left and right doctor position adjusters 44 are fixed via a spacer 42. A squeegee mounting rod 47 is supported between the lower ends of both squeegee pressure force regulators 43 so as to be adjustable in angle due to the relationship between a long hole 45 and a bolt 46 shown in FIG. The above-mentioned squeegee 6 is attached to the squeegee 6. In addition, both doctor position adjusters 4
A doctor attachment rod 48 is installed and fixed between the lower ends of the doctor attachment rod 4, and the doctor 7 is attached to the lower side of the doctor attachment rod 48. Based on the action of the switching mechanism, during printing, the squeegee 6 is pressed against the screen plate 5, and the doctor 7 is separated from the screen plate 5, as shown by the solid line in FIG. 7 is brought into contact with the screen plate 5, and the squeegee 6 is spaced upward from the screen plate 5.

Next, the structure of the squeegee pressure regulator 43, which is the essential part of this invention, will be explained in detail based on FIGS. 3, 5, and 6.

A vertically extending rectangular tubular outer cylinder 21 serving as a movement guide member in this embodiment is fixed at its lower end to the inner surface of the spacer 42, and a manual operation section is mounted on a cap 26 fitted and fixed to its upper end. 22 is rotatably attached to the upper end shaft portion 24a of the drive screw 24. The drive screw 24 is the key 23
It can be rotated integrally with the manual operation section 22 through the drive screw 24, and a driven nut 25 is provided at the lower end of the drive nut 25 so as to move up and down as the drive screw 24 rotates.
is screwed on. A connecting body 27 is fitted into the protruding lower end of the driven nut 25 so as to be able to move vertically together with the driven nut 25, and an elevating sleeve 2 that extends vertically is attached to a female threaded portion 37 formed in the lower end of the connecting body 27.
8 is screwed at its upper end.

Further, a scale plate 32 extending vertically is disposed in front of a guide hole 30 formed along the vertical direction on the front surface of the outer cylinder 21, and as shown in FIG. It is fixed to the front surface of the connecting body 27 by a pair of upper and lower screws 31 via a spacer 35 that fits into the spacer 35 . This scale plate 32
A position scale 33 is marked on the upper side of the outer cylinder 21, and a position indicator 34 is fixed to the front surface of the outer cylinder 21 so as to correspond to the position scale 33. A driving member 36 of the squeegee pressurizing force regulator in this embodiment includes the driving screw 24, driven nut 25, connecting body 27, and lifting sleeve 28.
is configured, and when the drive screw 24 is rotated with the operation of the manual operation section 22, the driven nut 2
5. The connecting body 27 and the elevating sleeve 28 are each moved up and down integrally, and the amount of movement thereof can be read by comparing the position scale 33 and the position index 34.

As shown in FIG. 3, a locking body 91 is fitted onto the outer periphery of the lower end of the lifting sleeve 28 so as to be slidable up and down, and a large diameter portion 90 formed at the lower end of the lifting sleeve 28 prevents the lifting sleeve 28 from falling off downward. is prevented. A squeegee support member 92 that can move up and down within the lower end of the outer cylinder 21 is connected and fixed at its upper end to the outer periphery of this locking body 91, and the above-described squeegee mounting rod 47 is supported on the inner surface of the lower end. .

On the other hand, a compression spring 9 is provided in a vertically extending spring accommodating portion 93 formed at the upper end of the squeegee support member 92.
4 is housed therein, and the upper surface of a spring presser pin 95 fitted to the upper end thereof is locked by an adjusting screw 96 screwed into the lower end of the elevating sleeve 28 so that its position can be adjusted. The squeegee support member 92 is always urged to move downward by the spring force of the compression spring 94, and when the squeegee 6 is separated from the screen plate 5, the locking body 91 and the large diameter portion 90 of the lifting sleeve 28 The squeegee support member 92 is held at the downward movement limit position by the engagement, and when the squeegee 6 is pressed against the screen plate 5, the squeegee support member 92 and the locking body are held against the spring force of the compression spring 94. 91 is moved upward as one unit. In addition, in FIG. 3, 97 is a set screw for preventing the adjustment screw 96 from loosening.

Further, as shown in FIG. 6, a pressure indicator 99 is fixed to the front surface of the upper end of the squeegee support member 92.
The front end thereof is located in the guide hole 30 of the outer cylinder 21 and the elongated hole 100 provided through the lower end of the scale plate 32. Then, when the squeegee 6 is pressed against the drive member 3 while compressing the compression spring 94,
6 is lowered, a pressure scale 101 marked on the lower side of the scale plate 32 moves integrally with it.
When the pressure indicator 99 is in a stopped state, the pressing force of the squeegee 6 against the screen plate 5 is displayed.

To briefly describe the configuration of the doctor position adjuster 44, an outer cylinder 102 with a position scale 105 marked on the front surface is erected on the inner surface of the left and right rear elevation plates 7 via a spacer 42. It is fixed, and a manual operation section 103 is rotatably attached to its upper end. This manual operation section 103
is provided with a drive screw 104 that extends downward within the outer cylinder 102 and is rotatable therewith, and a driven nut 106 is screwed onto the lower end of the drive screw 104 .

This driven nut 106 has a doctor support member 10 slidably inserted into the outer cylinder 102.
7 is integrally movably connected at its upper end, and the doctor attachment rod 76 to which the doctor 7 is attached is fixed to the inner surface of its lower end. When the manual operation unit 103 is rotated, the drive screw 104
By moving the doctor supporting member 107 up and down via the driven nut 106, the vertical position of the doctor 7 is adjusted, and the amount of vertical movement is adjusted so that it is located in the through hole 108 formed in the outer cylinder 102. The position scale 105 can be read by comparing the movable index 109 fixed to the front surface of the doctor support member 107 with the position scale 105.

Next, the adjustment operation of the squeegee pressure regulator 43 configured as described above will be explained.

Now, in this type of screen printing machine, the vertical position and pressing force of the squeegee 6 relative to the screen plate 5 are adjusted prior to the printing operation.
The vertical position adjustment is performed to set the reference position of the squeegee 6 relative to the screen plate 5 in response to changes in the length of the squeegee 6 due to the inclination angle of the squeegee or wear.
The tip is adjusted so that it lightly contacts the screen plate 5. Further, the pressing force of the squeegee 6 is adjusted in order to apply an appropriate pressing force to the squeegee 6 according to the conditions of the printing material or the ink, and the quality of the finished printing is determined by this adjustment of the pressing force. The squeegee pressure regulator 43 in this embodiment can simultaneously adjust the vertical position of the squeegee 6 and the pressure force by rotating one manual operation section 22.

That is, when setting the squeegee 6 to the reference position, by rotating the manual operation part 22 in one direction, the driven nut 25, the connecting body 27, and the lifting sleeve 28 are moved as the drive screw 24 rotates. lowered in one piece. At this time, the squeegee support member 92 is pressed downward by the spring force of the compression spring 94, and the locking body 91 is moved against the elevating sleeve 28.
Since the squeegee support member 92 is locked to the large diameter portion 90 of the squeegee support member 92, the squeegee support member 92 is moved downward integrally with the elevating sleeve 28 and the like. Therefore, with the squeegee 6 lightly touching the screen plate 5, the manual operation section 2
When the operation 2 is stopped, the reference position of the squeegee 6 with respect to the screen plate 5 is set. The amount of movement of the squeegee 6 to this reference position can be easily confirmed by comparing the position indicator 34 and the position scale 33.

Next, at this reference position, the squeegee 6 presses the screen plate 5 with an appropriate pressure force.
When setting the operating position of
may be further rotated in the same direction from the stop position. Then, in the initial stage of the operation, the elevating sleeve 28 and the squeegee support member 92 are lowered integrally and the squeegee 6 is bent to a certain limit against its own elasticity, and then the squeegee support member 92 is lowered. 92 is stopped moving, and the lifting sleeve 28 presses the compression spring 94 via the spring holding pin 95.
is moved downward while compressing it. Therefore, as the repulsive force of the compression spring 94 increases, the pressing force of the squeegee 6 increases. At this time, since the movable indicator 99 is stopped together with the squeegee support member 92, if the pressure scale 101 of the scale plate 32 lowered together with the connecting body 27 is read in comparison with the pressure indicator 99, the squeegee The pressure applied to the screen plate 5 of No. 6 can be set to a desired appropriate value.

As described above, according to the squeegee pressure regulator 43 in this embodiment, the vertical position adjustment and pressure force adjustment of the squeegee 6 can be easily and quickly performed. Unlike conventional screen printing machines, which are placed in separate units, operability during adjustment work is dramatically improved. Further, in this embodiment, the scale plate 32 is connected to the driver 2.
7, and the scale plate 32 is provided with a position scale 33 and a pressure scale 101, so that the vertical position and pressing force of the squeegee 6 at the reference position and the operating position can be easily confirmed. When performing multicolor printing on a substrate, if the printing pressure is adjusted to be constant for each color, the resulting print will be uniform and beautiful. Furthermore, the compression spring 94 also has the function of buffering the impact force acting on the squeegee 6 based on the unevenness of the printing material.

Effects of the invention As detailed above, this invention consists of a moving guide member supported on the machine frame of a screen printing machine, and a moving guide member supported by the moving guide member that can be moved freely in both directions of pressing and separating from the screen plate based on manual operation. an adjustment member whose position is adjusted by being moved to a position; a squeegee support member that is connected to the adjustment member so as to be relatively movable along both directions and supports a squeegee on a part thereof; this squeegee support member and the adjustment member. and a biasing member for biasing the squeegee support member in the pressure contact direction;
By comprising a locking member for stopping the movement of the squeegee support member in the pressure contact direction at a predetermined position, the vertical position of the squeegee and the pressing force can be adjusted easily and quickly by operating a single manual operation unit. It has excellent effects.

[Brief explanation of the drawing]

Figure 1 is a left side view of a screen printing machine that embodies this idea, Figure 2 is a plan view of the main parts showing the support structure for the squeegee and doctor, and Figure 3 is a cutaway front view of the main parts showing the squeegee pressure regulator. Figure 4 is the third
5 is a sectional view taken along line 4-4 in the figure, FIG. 6 is a sectional view taken along line 5-5 in FIG. 3, and FIG.
FIG. 6 is a cross-sectional view taken along line 6. An opening/closing frame 3 as a machine frame, a screen plate 5, a squeegee 6, an outer cylinder 2 as a movement guide member
1, drive member 36, squeegee pressure regulator 43,
A locking body 91, a squeegee support member 92, and a compression spring 94 as a biasing member.

Claims (1)

[Claims for Utility Model Registration] 1. Screen printing which is equipped with a squeegee 6 that can press against and separate from the screen plate 5, and the squeegee 6 slides on the screen plate 5 under pressure to print on the printing material. In the machine, a movement guide member 21 supported by the machine frame 3 of the screen printing machine, and a movement guide member 21 supported by the movement guide member 21 and moved to an arbitrary position in both the pressure contact and separation directions based on manual operation to adjust the position. a squeegee support member 92 that is connected to the adjustment member 36 so as to be relatively movable along both directions and partially supports the squeegee 6; this squeegee support member 92 and the adjustment member 3;
a biasing member 94 for biasing the squeegee support member 92 in the pressure contact direction;
interposed between the squeegee support member 92 and the adjustment member 36, and the screen plate 5 of the squeegee 6
and a locking member 91 for stopping the movement of the squeegee support member 92 in the pressing direction at a predetermined position based on the action of the biasing member 94 when separated from the squeegee in a screen printing machine. Pressure pressure regulator. 2. The movement guide member 21 and the adjustment member 36 have index portions 33 and 34 that correspond to each other, and by comparing the index portions 33 and 34, the adjustment member 36
A pressurizing force regulator for a squeegee in a screen printing machine according to claim 1, which displays the amount of movement of the squeegee. 3. The adjustment member 36 and the squeegee support member 92 have index portions 99, 101 corresponding to each other,
Claim 1 of the Utility Model Registration Claim in which the amount of movement of the adjustment member 36 with respect to the squeegee support member 92 is expressed by comparing the index portions 99 and 101, and the pressing force of the squeegee 6 during pressure contact is displayed. A pressurizing force regulator for a squeegee in the screen printing machine described above.