JPH0525884Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Industrial application field) This invention is based on the separation of the printed surface and the substrate on the screen of the plate frame (printing plate) set in a screen printing machine. This invention relates to a plate separation device for a screen printing machine, which enables accurate printing by smoothing out the ink leveling (ink return) by a doctor after printing.

(Prior Art) Generally, in screen printing, printing is carried out by setting a screen printing plate frame on a printing material, and moving a squeegee and a doctor over the frame by vertically inverting and reciprocating.

At this time, an appropriate interval is set between the plate frame and the substrate depending on the condition of the printing surface of the substrate, and the squeegee travels in synchronization with the printing operation of the squeegee. By raising the accompanying plate frame while gradually inclining it, it is separated from the printing material.

This slope rise of the plate frame is set to synchronize with the movement of the squeegee in the printing direction.
Further, when returning ink by the doctor, the ink is gradually lowered horizontally as the doctor moves. This is configured to rise and fall in synchronization with the running direction of the squeegee and doctor.

(Problem to be solved by the invention) In such a conventional printing mechanism, the running direction of the squeegee and doctor and the tilting up and down of the plate frame are
It is assumed that the ink rises in the printing direction with the squeegee, and descends in the ink return direction with the doctor.

Therefore, when printing with a squeegee, it is easy to separate the plate frame from the printing material, but when returning ink with a doctor, even if the pressure force of the doctor against the plate frame is constant, The distance to the plate frame will be different from that at the end of ink return.

Therefore, even if the pressing force against the plate frame screen is large during ink return, it becomes small at the end of the ink return, so the amount of ink returned to the plate frame differs between when the ink return starts and when the ink return ends. Therefore, when printing with a squeegee, the amount of ink varies with respect to the printing material, and the printing as a whole may become extremely unsightly.

Therefore, this idea was devised in view of the existing circumstances as described above, and in order to ensure that the plate separates easily during printing with a squeegee, it is necessary to gradually raise the slope from the edge of the squeegee. Needless to say, the purpose of this invention is to be able to average the amount of ink on the plate frame over almost the entire surface when the ink is returned by the doctor, and to enable accurate printing.

[Structure of the invention] (Means for solving the problem) In order to achieve the above-mentioned purpose, in this invention, the squeegee and doctor are vertically reversed on the plate frame for the printing material, and the squeegee guide frame is In a plate release device of a screen printing machine, which sequentially raises the plate frame support part at an incline as the squeegee runs in the printing direction, when the squeegee runs in the printing direction to perform printing, a clutch shaft supported on a squeegee guide frame so as to be rotatably swung; and an office converter operating mechanism in which the clutch shaft is connected to a rotary clutch portion that cuts off drive transmission and becomes free after printing by the squeegee is completed; a positioning mechanism for positioning and adjusting a fulcrum block attached to the clutch itself so as to be slid in the radial direction of the clutch; and a positioning mechanism having a proximal end pivotally connected to the fulcrum block; The off-control lever is pivotally connected to the tip of the off-control lever, and is pivoted to the arm shaft supported on the squeegee guide frame so that it swings as the off-control lever is towed. The machine is characterized by comprising an attached tilting mechanism, and a slide shaft that is connected between the tilting mechanism and the plate frame support and tilts and raises the plate frame support by swinging of the tilt mechanism. do.

(Function) In the plate separation device of the screen printing press according to this invention, when the squeegee in the printing device starts traveling in the printing direction, the plate frame is sequentially tilted upward from the end thereof.

In other words, as the squeegee runs, the clutch section of the office controller operating mechanism rotates and swings, and this rotational swing in the clutch section pulls the office controller lever via the fulcrum block that is slidably supported by the clutch section. do.

Then, the end of the plate frame support part is gradually raised via the slide shaft by the swinging of the tilting mechanism, and the plate frame is gradually separated from the printing material as the squeegee moves.

After printing is completed, the clutch section, which becomes free when the drive transmission is cut off, releases the upward movement of the slide shaft in the tilting mechanism, and the plate frame returns to a horizontal position.

Therefore, when the doctor in the printing device runs to level the ink on the plate frame, the plate frame is set horizontally, so that the ink leveled by the doctor is averaged over the entire surface of the plate frame. It is done.

(Example) Hereinafter, an example of this invention will be described with reference to the drawings.

In general, a screen printing machine, as shown in FIG. 4, moves freely forward and backward between the printing position and the paper feeding position on the main body frame 1 with the printing material W placed thereon. printing table 2
and the printing material W on the printing table 2 at the printing position.
A plate frame lift device 3 that allows the plate frame S set on the plate frame S to be raised and lowered freely, a squeegee that traces the ink on the plate frame S, and a doctor that levels the ink after printing are vertically reversed relative to each other. The printing device 4 includes a printing device 4 that is caused to travel.

Thus, the plate frame lift device 3 that allows the plate frame S to move up and down freely includes a plate frame support section 6 and the printing device 4 on a lift shaft 5 that is guided up and down by a motor on a support of the main body frame 1. The plate separation device of the screen printing machine according to this invention automatically returns the plate frame S to the horizontal position when the ink is returned by the running of the doctor after the squeegee is raised and lowered during printing. , the amount of ink returned by the doctor is averaged over almost the entire printing surface of the plate frame S.

That is, as shown in FIG. 1, a clutch shaft 11 is provided which is rotated and swung by the running of the squeegee in the printing direction.
An office computer operating mechanism 1 is connected to a clutch portion 13 that cuts off the drive transmission after printing with the squeegee is completed.
0, a positioning mechanism 15 for positioning and adjusting a fulcrum block 23 that slides in the radial direction of the clutch part 13; a tilting mechanism 35 which is pivotally connected to the tip of the offline controller lever 30 and tilts and raises the plate frame support 6 via a slide shaft 39 by swinging as the offline controller lever 30 is pulled.
It is equipped with the following.

The office computer operating mechanism 10, the positioning mechanism 15, and the tilting mechanism 35 are each disposed on the squeegee guide frame 7 of the printing device 4, which is supported on the upper part of the lift shaft 5, and as shown in the figure, these The squeegee guide frame 7 is provided at one end of the squeegee guide frame 7 where the squeegee in the device 4 starts running when the printing operation starts.

The off-con operating mechanism 10 supports the clutch shaft 11 on the squeegee guide frame 7 so as to be rotated by a drive means 12 (see FIG. 3) which is driven synchronously with the running of the squeegee. The clutch shaft 11 is located inside the squeegee guide frame 7 and connects a clutch part 13. The drive is transmitted during travel, and after printing with the squeegee is finished, the drive is cut off and becomes free.

As shown in FIGS. 1 and 2, the positioning mechanism 15 is disposed inside the squeegee guide frame 7 on a base plate 16 fixed to one end of the squeegee guide frame 7. That is, an adjusting block 19 is vertically movable and guided by a guide shaft 18 between an upper plate 17 facing the base plate 16, and an adjusting block 19, which is inserted through the base plate 16, is provided. Feed screw 21
and adjust block 19.
A fulcrum block 23 which is slidably supported by a guide plate 22 fixed to the clutch part 13 is pivotally connected by a joint plate 24.

In addition, the adjusting block 19 shown in the figure
Adjustment of the vertical movement is performed by an adjuster 25 which is rotatably operated. As shown in FIGS. 1 and 2, this adjuster adjustment means 25 is connected to an office computer main shaft 26 supported along the front-rear direction on the squeegee guide frame 7, and a left-right direction at one end of the squeegee guide frame 7. A gear transmission section 28 such as a worm or bevel gear, which engages the office controller main shaft 26, office controller slave shaft 27, and adjuster feed screw 21, supported along the side, and a gear transmission section 28 such as a worm or bevel gear, which projects forward from the squeegee guide frame 7. The rotary knob 29 is fixed to the base end of the main shaft 26 of the office computer.

Therefore, in the adjustment means 25, by rotating the rotation knob 29, the office computer main shaft 26 is rotated, and the office computer slave shaft 2 is rotated.
7. When the adjustment feed screw 21 is rotated via the gear transmission section 28, the adjustment feed screw 2
The adjustment block 19 moves up and down as the adjustment block 1 rotates. Then, the fulcrum block 23 is slid up and down via the joint plate 24, and this sliding changes the fulcrum position of the fulcrum block 23 itself in the radial direction in the swinging and rotating clutch portion 13.

Further, the off-con lever 30 has its base end pivoted on the fulcrum block 23, and the clutch portion 13
As the squeegee guide frame 7 rotates and swings, it is pulled, and in the illustrated case, the end of the squeegee guide frame 7 is pulled toward the side (to the left in FIG. 1).

The tilting mechanism 35 includes a first office control arm 37 having a tip end of the office control lever 30 pivotally supported on an arm shaft 36 supported on the squeegee guide frame 7;
Slide shaft 3 pivotally connected to plate frame support 6
9, and by swinging the first and second office control arms 37 and 38 as the office control lever 30 is pulled, the slide shaft 39 is pulled upward.

In this tilting mechanism 35, the off-con lever 3
0, the first office control arm 37 and the second
When the office computer arm 38 is swung, the plate frame support part 6 is raised via the slide shaft 39, and the end portion of the plate frame support part 6 is gradually raised.

Note that after printing is completed by the squeegee operation of the printing device 4, the upward movement of the slide shaft 39 is released as the drive transmission at the clutch section 13 is cut off, and as a result, the plate frame support section 6 is moved. Since it will fall suddenly, a buffer mechanism (not shown) is provided to prevent and protect it from falling.

This invention is constructed as described above, and its operation will be explained below.

When the plate frame S is set on the plate frame support part 6 of the plate frame lift device 3 and the printing table 2 on which the substrate W is placed reaches the printing position on the main body frame 1, the plate frame lift device 3 is lowered. Then, the printing frame S is positioned on the printing medium W.

Then, the squeegee in the printing device 4 starts running in the printing direction, and accordingly, the plate frame S is sequentially tilted upward from the end of the plate frame S. That is, as the squeegee runs, the clutch portion 13 in the office air conditioner operating mechanism 10 rotates and oscillates, causing the clutch portion 13 to rotate.
The rotational swing at the clutch portion 13 is caused by the fulcrum block 23 which is slidably supported by the guide plate 22 at the clutch portion 13.
The off-con lever 30 is towed through. Then, the end of the plate frame support part 6 is gradually raised by the slide shaft 39 via the swinging first and second office controller arms 37 and 38 of the tilting mechanism 35, and as the squeegee moves, Print frame S
is gradually separated from the printing target W. After printing is completed, the clutch portion 13 that interrupts the drive transmission releases the upward movement of the slide shaft 39 in the tilting mechanism 35, and the plate frame S returns to the horizontal position.

Therefore, the doctor in the printing device 4 runs to level the ink on the plate frame S. At this time, since the plate frame S is set horizontally, the doctor can level the ink. It is averaged over the entire surface.

At this time, when the vertical position of the adjusting block 19 in the positioning mechanism 15 is changed by operating the adjusting means 25, the fulcrum block 2
3 is slid along the radial direction of the clutch portion 13, the pulling position of the off-con lever 30 is changed, and the slide shaft 39 is moved up and down by the tilting mechanism 35 using the base end position of the off-con lever 30 as a fulcrum. The position is also changed, and the range of inclination rise at the edge of the plate frame S can be adjusted.

[Effects of the invention] This invention is configured as described above, and as a result, when printing with a squeegee, separation between the plate and the printing material W as the squeegee runs is smoothed out, and the doctor When leveling the ink, by setting the plate frame S horizontally, the ink can be leveled uniformly over the entire screen.

That is, the clutch shaft 11 is supported on the squeegee guide frame 7 so as to be rotated and swung as the squeegee runs in the printing direction.
The clutch shaft 11 is connected to an office converter operating mechanism 10 which is connected to a rotary clutch section 13 which cuts off the drive transmission and becomes free after printing by the squeegee is completed, and the clutch shaft 11 is configured to slide in the radial direction of the clutch shaft 11. a positioning mechanism 15 for positioning and adjusting the fulcrum block 23 attached to the clutch part 13 itself; and an off-con lever whose base end is pivotally connected to the fulcrum block 23 and is swinging and towed by the rotation of the clutch part 13. 30, which is pivotally connected to the tip of the off-con lever 30, and the off-con lever 3
A tilting mechanism 35 is swingably attached to an arm shaft 36 supported on a squeegee guide frame 7 so as to swing as the frame frame supporting section 6 is pulled by This is because the slide shaft 39 is connected to the slide shaft 39 and tilts and raises the plate frame support section 6 by the swinging of the tilting mechanism 35.

That is, the clutch section 13 transmits drive in only one direction, and when the squeegee of the printing device 4 is traveling in the printing direction, the clutch section 13 transmits the drive and rotates the clutch section 13 itself and rotates at the fulcrum. By swinging and pulling the off-con lever 30 through the block 23 and lifting the slide shaft 39 by swinging the tilting mechanism 35, the plate frame support 6 is gradually raised and separated from the printing material W. At the end of the process, the drive transmission is cut off, thereby releasing the upward traction of the plate frame support 6 and automatically returning it to the horizontal state. For this reason, the frame support part 6
There is no need to incorporate any special biasing means for horizontal return, and the overall configuration can be simplified.

Furthermore, the range of inclination of the edge of the plate frame, which is the amount of separation of the plate from the printing medium W, can be determined by simply sliding the position of the fulcrum block 23 in the clutch part 13 in the radial direction of the clutch part 13. It can be adjusted and set.

As explained above, this invention not only ensures ease of plate separation during printing with a squeegee, but also reduces the amount of ink on the plate frame when returning ink with a doctor. It has excellent effects such as being able to average over the area and making accurate printing possible.

[Brief description of the drawings]

The drawing shows one embodiment of this invention.
The figure is a side view of the main parts as seen from the inside with some parts omitted when installed in a prescribed screen printing machine, Fig. 2 is a rear view of the main parts, Fig. 3 is a plan view of the main parts, and Fig. 4 is a plan view of the main parts. The figure is a side view showing the entire screen printing machine. S... Plate frame, W... Printing material, 1... Main body frame, 2... Printing table, 3... Plate frame lift device, 4... Printing device, 5... Lift shaft, 6
. . . plate frame support portion, 7 . 17... Upper plate, 18... Guide shaft, 19... Adjustment block, 2
1... Adjustment feed screw, 22... Guide plate, 23... Fulcrum block, 24... Joint plate, 25... Adjustment adjustment means, 26
... Office control main shaft, 27 ... Office control slave shaft, 28 ... Gear transmission section, 29 ... Rotating knob, 30 ... Office control lever, 35 ... Tilt mechanism, 36 ... Arm shaft, 37 ... First Office computer arm, 38...Second office computer arm, 39
...Slide shaft.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. When performing printing by vertically reversing the squeegee and doctor on the plate frame for printing material and running along the squeegee guide frame, by running the squeegee in the printing direction. , a plate release device for a screen printing machine that sequentially tilts and raises a plate frame support part, a clutch shaft supported on a squeegee guide frame so as to be rotated and swung by the running of a squeegee in the printing direction;
This clutch shaft is connected to an office converter operating mechanism that cuts off the drive transmission and becomes free after the squeegee finishes printing.
a positioning mechanism for positioning and adjusting a fulcrum block mounted on the clutch itself so as to be slid in the radial direction of the clutch; An off-con lever that is oscillated and towed,
A tilting mechanism is pivotally connected to the tip of the off-con lever, and is swingably attached to an arm shaft supported on a squeegee guide frame so as to swing as the off-con lever is towed. A plate separating device for a screen printing press, comprising: a slide shaft that is connected between the plate frame support parts and tilts and raises the plate frame support parts by swinging of a tilting mechanism. 2. The positioning mechanism is provided with an adjusting block that is movable up and down and guided by a guide shaft between a base plate fixed to one end of the squeegee guide frame and an upper plate opposed to the base plate. Request for registration of a utility model in which an adjusting feed screw inserted through the clutch is screwed in, and the adjusting block and a fulcrum block which is slidably supported by a guide plate fixed to the clutch are pivotally connected by a joint plate. A plate separation device for a screen printing machine according to item 1. 3 To adjust the vertical movement of the adjustment block,
The main shaft of the office converter supported along the front-rear direction on the squeegee guide frame, the slave shaft of the office converter supported along the left-right direction at one end of the squeegee guide frame, the main shaft of the office converter, the subordinate shaft of the office converter, and the adjustment feed screw. A screen printing machine according to claim 2, which is registered as a utility model and has an adjuster adjustment means comprising a transmission part that engages with each other, and a rotary knob fixed to the base end of an office converter main shaft protruding forward from a squeegee guide frame. plate separation device.