JPH03288758A - Positioning of strip-shaped extremely low tension sheet - Google Patents

Abstract

PURPOSE:To eliminate the time loss due to correction by detecting the error between a standard hole on an extremely low tension sheet at the one-pitch upstream side position of a set position and a standard position and revolution- controlling the intermittent feed in the next time in the lengthwise, lateral, and horizontal directions of the extremely low tension sheet based on the error detection value. CONSTITUTION:A strip-shaped extremely low tension sheet 4 is suspended at a prescribed position before and behind a set position. When the extremely low tension sheet 4 between both the suspension parts 11 is clamped at a pressure free from being pressed vertically, by clamps 13 and 14, and intermittent feed is carried out, the error between a standard hole on the extremely low tension sheet 4 and a standard position is detected by a CCD camera 29, at the one-pitch upstream side position of a set position, and the intermittent feed in the next time is revolution-controlled in the lengthwise, lateral and horizontal directions of the extremely low tension sheet 4 based on the detection value.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a method for continuously and highly accurately positioning a belt-shaped ultra-low tension sheet at a set position without causing any deformation to the sheet. .

(Prior Art) For example, in the printing process of green sheets (hereinafter referred to as rGsJ), the positioning accuracy of the through holes and printed circuit patterns must be within ±0.05 degrees due to the functionality of the product. For this reason, when pressing through-holes, as shown in FIG. 3, a reference hole 1 for positioning is formed in the GS4, and a positioning pin 3 is inserted into the reference hole 1 and protrudes from the surface plate 2 of the printing machine. Positioning was performed by inserting . During this alignment, it was difficult to transport the belt-shaped GS without deforming it in any way, so the operator manually cut the GS into a predetermined length.

(Problem to be Solved by the Invention) However, in the above-mentioned manual positioning using the positioning pins, there are cases where the deviation from the allowable value (within ±0.05 mm) occurs due to play due to the gap between the reference hole and the positioning pins. Moreover, the work efficiency was also poor.

In addition, in order to improve work efficiency, it is necessary to continuously supply belt-shaped GS without cutting it.
It is difficult to continuously transport an extremely low tension sheet such as S without deforming it in any way. Even if it were possible to transport the GS, it would be structurally difficult to align the GS using the reference hole and the positioning pin with an external force within the permissible value.

The present invention was developed in view of such conventional problems, and an object of the present invention is to provide a method for highly accurate positioning of a continuously conveyed belt-shaped ultra-low tension sheet without deforming it in any way. That is.

(Means for Solving the Problems) In order to achieve the above object, a method for positioning a belt-shaped ultra-low tension sheet according to the present invention is a method of positioning a continuously conveyed belt-shaped extremely low-tension sheet at a set position. In this method, a belt-shaped ultra-low tension sheet is suspended at predetermined positions before and after the set position, and the ultra-low tension sheet between the two suspended parts is clamped from above and below with pressure to the extent that it does not roll. , the error between the reference hole of the ultra-low tension sheet and the reference position is detected at a position one pitch upstream of the set position, and based on this detected value, the next intermittent feed is adjusted to the front and back of the ultra-low tension sheet.
It is intended to control rotation in the left-right and horizontal directions.

(Function) According to the above-mentioned method of the present invention, since positioning is performed with the belt-shaped ultra-low tension sheet suspended before and after the set position,
No deformation occurs in the low tension sheet. In addition, in the method of the present invention, the deviation of the ultra-low tension sheet is detected one pitch before the intermittent feed to the set position, and the feed direction is controlled during the intermittent feed to the next set position, making it possible to perform highly accurate positioning without time loss. becomes.

(Example) The method of the present invention will be explained below based on FIGS. 1 and 2.

FIG. 1 is a schematic perspective view showing an example of an apparatus for carrying out the method of the present invention, and 11 in FIG. This is the suspension part. By providing these suspension parts 11, deformation of the GS 4 during positioning can be prevented.

12 is arranged between the suspension parts 11, and the belt-shaped GS between these parts
This is a feed position control device that also serves as tact feed for intermittent feeding by clamping 4 from above and below with pressure that does not cause rolling.
4 and the pair of movable clamps 14 in the GS4 feeding direction (hereinafter referred to as "X-axis direction").
The servo motor 15 and ball screw 16 around the shaft, as well as the synchronized movement mechanism in the X-axis direction and the movement clamp 14 are
A Y-axis servo motor 17 and a ball screw 18, which are the Y-axis moving mechanism for moving the S4 in the width direction (hereinafter referred to as "Y-axis direction"), as well as the X-axis and Y-axis moving mechanisms and the moving clamp 14. It is composed of a servo motor 19 for the θ axis and a ball screw 20 for rotating the θ axis by a required angle in the horizontal direction (hereinafter referred to as the “θ direction”).

That is, the X-axis and
The Y-axis movement mechanism is a support 21 on which the surface plate 2 of the printing press is erected.
The Y-axis slide base 22 is mounted on a Y-axis slide base 22 which is rotatably installed via a bearing (not shown), and this Y-axis slide base 22 is connected to a servo motor 19 placed on a θ-axis slide base 23, which allows forward and reverse rotation. Rotating ball screw 2
0 to rotate the required amount with respect to the support column 21.

By the way, since the amount of movement in the θ-axis direction is minute (maximum 30
If the Y-axis slide base 22 is rotated directly using a gear mechanism or the like, the reduction ratio will increase and the accuracy will deteriorate due to backlash. Therefore, the present embodiment discloses an apparatus in which linear movement using the servo motor 19 and ball screw 20 is approximated to circular arc movement. An example is shown in FIG. That is, in FIG. 2, the female screw member 24 screwed into the ball screw 20 is movable in the pitch direction of the ball screw 20 using the slider 25, and the female screw member 24 is connected to the female screw member 24 through the hair ring 26. erect the rotational center shaft 27, and place the upper end of this rotational center shaft 27 on the slider 2 again.
It is attached to the back surface of the Y-axis slide base 22 via 8.

Reference numeral 29 is a CCD camera for confirming the position of the GS4, which is installed at a position one tact feed pitch before the printing position (set position) on the surface plate 2, and the reference hole 1 opened in advance in the GS4 is the reference position. The amount of error is detected by comparison, and the correction signal is sent to each of the above-mentioned servo motors 15.
This will be output on 17.19. An example of a correction method in this case will be described below. For example, the error from the reference position of reference hole 1 of GS4 is x, y on one side, and X2, Y on the other side.
In the case of 2, the correction amounts X, Y, and θ are determined by the following formulas.

Here, W indicates the distance in the width direction between both reference holes.

The values determined by this method are output to each servo motor 15.17°19 for correction during one pitch tact feed.

That is, the degree of error in the position of the reference hole 1 of the GS4 at the reference position is detected by the CCD camera 29, and based on this detected value, the correction amount for the next 1 pitch of tact feed is determined in the above-mentioned step 2. . This correction amount is then output to each servo motor 15, 17, and 19. Then fixed clamp 1
3 is open, the movable clamp 14 is operated to close, and GS4
is clamped, and in this state, each servo motor 15, 17, 19 is operated according to the output signal to perform one pitch tact feeding. When the paper is tact-fed and transported to the printing position, it is positioned with high precision. Next, fixing clamp 13
is closed and the movable clamp 14 is opened, and in this state the movable clamp 14 returns to its original position. Note that 30 is a cylinder device for opening and closing the fixed clamp 13, and 31 is a cylinder device for opening and closing the movable clamp 14.

(Effects of the Invention) As explained above, according to the method of the present invention, since the extremely low tension sheet is positioned in a suspended state at predetermined positions before and after the set position, no deformation or the like is given to the extremely low tension sheet. . Furthermore, in the present invention, an error with the reference position is detected one pitch before the set position and the error is corrected during tact feeding to the set position, so there is no time loss due to correction.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the method of the present invention, Fig. 2 is a detailed explanatory diagram of the movement mechanism in the θ-axis direction applied to the method of the present invention, (a) is a front view, (b) is a side view, and Fig. 3 is a FIG. 2 is an explanatory diagram of a conventional method. 1 is a reference hole, 11 is a suspension part, 12 is a feed position control device,
13 is a fixed clamp, 14 is a movable clamp, 15.17
．． 19 is a servo motor, 16° 18.20 is a ball screw, and 29 is a CCD camera.

Claims (1)

[Claims] (1) A method of positioning a continuously conveyed belt-shaped extremely low tension sheet at a set position, in which the belt-shaped extremely low tension sheet is suspended at predetermined positions before and after the set position, and both suspensions are suspended. When clamping an ultra-low tension sheet between sections with pressure that does not cause rolling from above and below and feeding it intermittently, the error between the reference hole of the ultra-low tension sheet and the reference position is detected at a position one pitch upstream of the set position. A method for positioning a belt-shaped ultra-low tension sheet, characterized in that the next intermittent feed is controlled in the front-back, left-right and horizontal directions of the ultra-low tension sheet based on this detected value.