JPS6032665A - Block separating unit of screen printing machine - Google Patents

Abstract

PURPOSE:To readily adjust steplessly the block separating amount of a screen block by adjusting the inclining angle of a guide slot of an adjusting point to alter the moving locus of an engaging roller, and setting the moving amount of a suspending bracket. CONSTITUTION:A connector 29 provided on a slider horizontally moves, a drive rod 20 slightly rotates by a spring 28, and as a suspending rod 30 rises, a link 46 moves forward. A lever 4 is rotated counterclockwise, a lever 48 rotates in the same direction via a shaft 43, and a suspended bracket 5 is moved upward. A connector 50 of the bracket is engaged with a connecting pin 51 to raise upward a block frame 6, thereby a screen block being isolated from paper P to be printed. The inclining angle of the slot 35 of an adjusting member 34 is adjusted to arbitrarily set the moving amount of the bracket 5.

Description

Detailed Description of the Invention Technical Field and Object This invention rotates the screen plate and gradually separates its starting point side from the substrate as the squeegee presses and opens the screen plate. This invention relates to a plate run device for a screen printing machine, which allows the plate to separate from the substrate by steplessly adjusting the amount of separation of the screen plate from the printing substrate. 1[
The purpose of this invention is to provide an 111 device.

Structure of the Invention In order to achieve the above-mentioned object, the present invention includes a drive member that is moved by a predetermined amount as the squeegee slides, and a drive member that is rotatably supported on a frame by a shaft and that is a part of the screen plate. A connected rotating member, a lever member that rotates integrally with the rotating member, a cam body supported on a frame so as to be adjustable in angle, and interposed between the lever member and the driving member. and a link having a cam follower that engages with the cam body.

EXAMPLE Hereinafter, an example embodying the present invention will be described based on the drawings.

First, the structure of the screen printing machine of this embodiment will be explained schematically based on FIG. 1 and FIG. 2. A frame-shaped opening/closing frame 3 is rotatably supported and driven to open and close up and down via a crank arm 4 by a Tanabata (not shown) installed in the machine base 1. The end is rotatably supported by the shaft 2, and
A plate frame 6 whose tip end is suspended and supported by the opening/closing frame 3 by a hanging metal fitting 5 is disposed, and a screen plate 7 is removably supported inside the frame frame 6. By the action of a plate separation device 19, which will be described later, during printing, the hanging metal fittings are moved upward, and the plate frame 6 is rotated independently of the opening/closing 71 and the norm 3.

As shown in FIG. 2, sliders 9 are arranged inside the left and right side frames 8 of the opening/closing frame 3. It healed and was driven back and forth 11 times. Also 1. There is a switching support 11112 between these sliders 9.
A squeegee 13 and a doctor 14 extending left and right are vertically movably supported so as to alternately contact the screen plate 7.

During printing, the slider 9 is driven by the servo motor 10 with the squeegee 13 being pressed against the screen plate 7 and the doctor 14 being separated upward from the screen plate 7 (see FIG. 1). ,
The squeegee 13 slides on the screen plate 7 with pressure toward the rear (to the right in FIG. 1), and the ink on the screen plate 7 is placed on the printing material P on the print base 15 (see FIG. 6). It looks like this. Further, when refilling the ink, the doctor 14 is brought into contact with the screen plate 7 and the squeegee 13 is spaced upward from the screen plate 7.
As the slider 9 moves forward, the doctor 14 spreads the ink over the top surface of the screen 5-plate 7.

In FIG. 2, 16 is a squeegee adjuster for adjusting the vertical position of the squeegee 13 and the pressure applied to the screen plate 7, and 17 is a doctor adjuster for adjusting the vertical position of the doctor 14. .

Next, as the squeegee 13 moves under pressure on the screen plate 7, the plate separating device 1 rotates the plate frame 6 to gradually separate the starting point side of the screen plate 7 from the printing material P.
The configuration of No. 9 will be explained.

As shown in FIGS. 2 and 6, inside the left side frame 8 is a plate-shaped drive rod 20 extending back and forth along the side frame 8.
(See Figure 6)
The case plate 2 is rotatably supported by the side frame 8, and its front free end is fixed inside the front end of the side frame 8.
It is located within the opening 23 of No. 2. Further, as shown in FIG. 4, the lower surface of the front end of the drive rod 20 is supported on a stopper 24 screwed onto the case plate 22, so that the drive rod 20 slopes gently downward toward the rear. 6- It is in a tilted state.

A spring locking body 2 fixed to the inner surface of the front end of this drive rod 20
A compression spring 28 is interposed between the body 27 and the spring receiver disposed on the bottom surface of the case plate 22, and the front end of the drive rod 20 is always urged upward by the force of the spring. There is. Incidentally, reference numeral 26 shown in FIG. 4 is an operation knob for moving the spring receiver U body 27 up and down to adjust the spring force of the compression spring 28.

As shown in FIG. 6, an engaging body 29 disposed on the left slider 9 is engaged with the upper surface of the drive rod 20, and during printing, as the slider 9 moves backward, the engaging body 29 6 is horizontally moved, the tilted drive rod 20 is rotated from the chain line position to the solid line position in FIG. 6 by the spring force of the compression spring 28. Further, at the front end of the drive rod 20, a vertically extending hanging rod 30 is rotatably supported at its upper end, and as shown in FIG. 5, a support shaft 32 is provided at its lower end. There is.

On the other hand, as shown in FIGS. 3 and 4, the case plate 22
A curved adjustment member 34 serving as a cam body is fixed to the tip of an adjustment shaft 33 that is pivotally supported at approximately the center of the adjustment shaft 33, and a guide groove 35 serving as an arcuate cam portion is formed in a concave shape on the inner surface of the adjustment member 34. has been done. A worm wheel 36 is attached to the M@protrusion of the adjustment shaft 33, and a worm wheel 39, which is rotated by the operation of an adjustment knob 37 provided on the front surface of the opening/closing frame 3, is engaged with the lower side of the worm wheel 36. When the adjustment knob 37 is rotated, the adjustment shaft 33 is rotated via the worm 39 and the worm wheel 36, so that the adjustment member 34 is moved between the chain line position and the solid line position shown in FIG. The angle can be adjusted between
The tip of 38 shown in the figure is in contact with the rear side of the adjustment member 34.
This is a regulating bolt screwed onto the case plate 22 so as to regulate the tilting position of the adjusting member 34 in the direction 84 in the figure.

As shown in FIGS. 4 and 5, between the case plate 22 and the bearing plate 42 fixed to the right side frame 8, there is a shaft 43 extending left and right inside the front side frame 41 of the opening/closing frame 3. is rotatably supported, and a first lever 44 serving as a lever member in this embodiment is fixed to the left end of this shaft 43 so as to be integrally rotatable. A link 46 is connected at one end to the tip of the first lever 44 through a pin 45, and an engagement roller 31 as a cam follower that fits into the guide groove 35 of the adjustment member 34 is attached to the other end. is pivotally attached via the support shaft 32.

When the adjusting member 34 is disposed at the limit position in the clockwise direction in FIG. 4, the guide groove 35 follows an arc centered on the bottle 45. Therefore, in the snake state, as the hanging rod 30 moves up and down, the engaging roller 31 performs an arcuate motion along the guide groove 35 with the link 46 as a radius, so that the first lever 44 is not rotated. Also, when the adjusting member 34 is tilted counterclockwise from this position, the center of the guide groove 35 is aligned with the bottle 4.
5, as shown in FIG.
1 is moved along a trajectory corresponding to the inclination angle of the guide groove 35, the link 46 is moved forward, and the first lever 44 is rotated integrally with the shaft 43 in the counterclockwise direction in the figure. It has become so.

On the other hand, a pair of left and right second levers 48 are attached to the shaft 43-to.
are fixed by tightening bolts 49, and the hanging fittings 5, which suspend and support the front end of the plate frame 6, are rotatably supported at their top ends. Therefore, the first lever 44. By rotating the shaft 43 and the second lever 48 together, the dual-use lower metal fitting 5 is moved upward, and the plate frame 6 is separated from the print base 15 by a predetermined angle about the shaft 2. It is designed to be rotated in the direction.

As shown in FIG. 7, a locking tool 50 for removably locking a locking bottle 51 installed on the front frame 6a of the plate frame 6 is provided at the lower end of these hanging metal fittings 5. is attached.

This locking tool 50 includes a locking portion 52 screwed onto the lower end of the hanging metal fitting 5, and an accommodation recess 56 for accommodating the locking portion 52.
The operating portion 54 has an uneven finger rest 57 on its outer circumferential surface, which is fixed with a 10-screw so as to cover the opening on one side of the accommodating portion 53. 52, the accommodating portion 53 and the operating portion 54 are respectively formed with square-shaped fitting portions 52a, 53a, and 54a into which the locking pin 51 is fitted. An opening 55 is formed by cutting and removing at an angle of 90 degrees, and this opening 55 allows the accommodation section 53 and the operation section 54 to be connected to each other.
is rotatable at an angle of 90 degrees with respect to the locking portion 52.

Then, when installing the screen plate 7, the locking bin 51
When locking with this locking tool 50, the operation part 54
Each fitting portion 52a is rotated by the rotation operation.

After arranging 53a and 54a on the same plane and fitting the locking bottle 51 into them, if the operation part 54 is rotated 90 degrees, the fitting part 52a of the locking part 52 is closed. The locking bottle 51 is irremovably locked to the cage shell 50. In addition, to release this locking state, if the operation part 54 is rotated 90 degrees in the opposite direction to the above case, each fitting part 52a, 53a, 54a will be aligned, so this locking tool 50 can be removed. It can be easily removed from the locking pin 51.

Next, the action of the plate separating surface applied to the screen printing machine constructed as above will be explained mainly with reference to FIG. 6.

Now, during printing, the doctor 14 is separated upward from the screen plate 7 based on the action of the cutting start support IM12 mentioned above, and the squeegee 13 is pressed against the screen plate 7 with a predetermined pressure. When the servo motor 10 is activated in this state of squeegee pressure contact, the squeegee 13 and the slider 9 are pressed and slid backward on the screen plate 7, and the ink on the screen plate 7 is applied to the printing material P-, l= Printing is performed.

On the other hand, as the slider 9 moves backward, the engaging body 29 provided on the slider 9 is moved horizontally, so that the driving rod 20, which is arranged in an inclined state, is moved by the spring force of the compression spring 28 as shown in FIG. It is rotated slightly clockwise and its front end is lifted off.

Then, as shown by the solid line in FIG. 6, when the adjustment member 34 is tilted at a predetermined angle by operating the adjustment knob 37, the engagement roller 31 is moved as the hanging rod 30 rises. Guided by the guide groove 35 of the adjustment member 34, the link 4
6 is moved forward, the first lever 44 is rotated by a predetermined angle counterclockwise in the figure. Therefore, the shaft 43
, the second lever 48 is rotated in the same direction, and the hanging fitting 5 is moved upward by a predetermined amount. For this reason, the locking tool 5
0 and the locking bin 51, the front side of the plate frame 6 is lifted upward, and the starting point side of the screen plate 7 supported within the plate frame 6 is lifted, so that it is moved forward than the squeegee 13. A certain screen plate 7 is separated from the printing substrate P. Therefore, plate separation is performed on the screen plate 7 after the squeegee 13 has passed, and the image after printing is reliably cut.

By the way, in this embodiment, since the adjustment knob 37 is operatively connected to the adjustment shaft 33 of the adjustment member 34, the adjustment knob 37
The inclination angle of the guide groove 35 of the adjustment member 34 can be easily adjusted by rotating the adjustment member 34 appropriately.

By changing the movement locus of the engagement roller 32, the amount of movement of the hanging fitting 5 can be arbitrarily set. That is, as shown in FIG. 4, when the regulating member 34 is placed at the limit position in the clockwise direction by the regulating bolt 38, the amount of movement of the hanging fitting 5 is set to O, and at this set position,
By operating the adjustment knob 37 to tilt the adjustment member 34 counterclockwise at an arbitrary inclination angle, the amount of movement of the hanging fitting 5 can be adjusted steplessly in accordance with the inclination angle.

Therefore, it is possible to easily set the plate release stone of the screen plate 7 in accordance with printing conditions such as the sliding speed of the squeegee 13 or the material of the printing medium P.

Note that when the doctor 14 returns the ink, the engaging body 29 rotates the drive rod 20 back as the slider 9 moves forward, so the screen plate 7 becomes parallel to the printing material P through the opposite action to that in the case described above. will be restored to a normal state. Therefore, ink return by the doctor 14 is performed smoothly.

The present invention is not limited to the configuration of the above-described embodiment; for example, an arcuate long hole may be formed in the adjustment member 34 instead of the guide groove 35, or the combination of lever mechanisms may be arbitrarily changed. It is also possible to arbitrarily change the configuration of each part without departing from the spirit of the invention, such as by configuring the screen plate 7 to be lifted directly by the hanging metal fittings 5, unlike the above-described embodiments. be.

Effects As detailed above, the present invention includes a driving member that is moved by a predetermined amount as the squeegee slides, and a rotating member that is rotatably supported on the frame by a shaft and connected to a part of the screen plate. A member, a lever member that rotates integrally with the rotating member, a cam body that is supported by the frame in an angle-adjustable manner, and a cam body that is interposed between the lever member and the driving member; By comprising a link having a cam follower that engages with the cam body, an excellent effect is achieved in that the amount of separation of the screen plate can be easily and steplessly adjusted.

[Brief explanation of drawings]

Fig. 1 is a right side view of the screen printing machine, Fig. 2 is a plan view showing the front end of the screen printing machine, Fig. 3 is a plan sectional view without showing the plate separation device embodying the present invention, and Fig. 4 Figure 5 is a front sectional view showing the plate release device, Figure 6 is an explanatory diagram of the operation of the plate release device, and Figure 7 is an exploded perspective view showing the locking device. It is. Screen plate 7, squeegee 13, plate separation device 19, drive rod 20 constituting the drive member. Hanging rod 30, engagement roller 31 as a cam follower, adjustment member 34 as a cam body
, a guide groove 35 as a cam portion, a shaft 43 . first lever 4
4. a second lever 48 as a link 461 rotating member;
Printed matter P0 patent applicant Mino Group Co., Ltd. Representative Benkoshi On 1) Hironori Tokukaisho (lie-32665 (9)

Claims (1)

[Claims] 1. As the squeegee (13) slides under pressure on the screen plate (7), the screen plate is rotated and its starting point side is gradually separated from the printing material (P). In a plate separation device for a screen printing machine, the plate separation device of a screen printing machine is configured to perform plate separation by a drive member (20, 30) that is moved by a predetermined amount as the squeegee slides, and a frame (3) by a shaft (43). a rotating member (48) rotatably supported by the rotating member; the rotating member is connected to a part of the screen plate;
The screen plate is moved away from the plate by the rotation of the rotation member, and a lever member (44) is rotated integrally with the rotation member.
a cam body (34) supported by the frame so that its angle can be adjusted; and a link (46) interposed between the lever member and the drive member and having a cam follower (31) that engages with the cam body. ) A plate separation device for a screen printing machine, characterized by comprising: 2. The plate separation device for a screen printing press according to claim 1, wherein the cam body has an arcuate cam portion (35). 3. The cam portion is formed along an arc centered on the connection point (45) between the lever member and the link when the cam body is placed at a predetermined tilting position. A plate separation device for a screen printing press according to scope 2. 4. The plate separation device for a screen printing press according to claim 2 or 3, wherein the cam portion is a concave guide groove (35). 5. The cam body has an adjustment knob (37), and the inclination angle of the cam part is adjusted by manual operation of the adjustment knob. The plate marking device of the screen printing machine described.