JPH0778402B2 - Positioning device - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a positioning device, and more particularly to a device for accurately positioning a detection device with respect to a reference plane.

(Technical Background of the Invention and Problems Thereof) In general, it is difficult to detect defects that appear as spots when printing at high speed. For this reason, the machine is stopped at the beginning or the end of the winding, and only a very small part of the visual inspection is performed. However, since it is not 100% inspection, defective products may be mixed inside, often causing problems.

As such a printed matter detection device, two sets of light-receiving surfaces of color sensor elements which receive visible light, separate it into red, green, and blue, and generate corresponding output voltages are arranged in a horizontal row. A detection unit is used, one of the units is arranged in the width direction perpendicular to the sheet flow direction before winding of the printed matter, and the other of the detection units is arranged in the sheet flow direction.
The color sensor elements are shifted by a pitch or several pitches and arranged so as to correspond to each other in the sheet flow direction, and the reflected light from the printed matter is received by two sets of detection units and the two sets of detection units correspond to each other. There is a device that detects a defect in a printed matter by calculating a difference voltage for red, green and blue of a color sensor element and comparing the difference voltage with a preset set voltage. FIG. 5A shows the relationship between the printed matter and the detection unit. The sheet 2 before winding the printed matter and the color sensor element are housed in a box, and the light receiving surface is opposed to the sheet 2 in the detection unit box. 3A and 3B, and a control box 4 having a mechanism for receiving and controlling detection signals from the detection unit boxes 3A and 3B
It consists of and. And FIG. 5 (B) shows the seat 2
The same pattern is continuously printed and flows in the direction indicated by the arrow to be output. That is, areas 2A and 2B
Are printed on the same pattern. The detection unit boxes 3A and 3B are arranged with an appropriate interval with respect to the sheet 2, and the two detection unit boxes 3A and 3B are
It is placed at a position shifted by the pitch. Therefore, these two
The color sensor elements in one of the detection unit boxes 3A and 3B will be placed right above the portions of the same pattern. That is, in FIG. 5 (B), the color sensor elements 5A and 5B correspond to each other and are located right above the same pattern areas 2A and 2B.

In this way, the two detection unit boxes 3A and 3B are placed at positions shifted by one pitch or several pitches of the sheet 2, and the difference voltage is detected to detect the defect of the print pattern. it can.

In this case, it is necessary to arrange the two detection unit boxes 3A and 3B in parallel to the surface of the sheet 2 and detect the pattern under completely the same conditions between the upstream side and the downstream side. Therefore, it is necessary to accurately position the detection sensor unit boxes 3A and 3B with respect to the seat 2. Conventionally, the detection sensor unit boxes 3A and 3B are moved up and down as a whole by a driving mechanism, I was trying to do positioning. For this reason, there are drawbacks that the inclination with respect to the seat 2 cannot be adjusted and the fine adjustment of the positioning cannot be performed.

(Object of the Invention) The present invention has been made under the circumstances described above.
An object of the present invention is to provide a device which has a simple structure and can perform accurate positioning.

(Summary of the Invention) A first invention (specific invention) relates to a positioning device, and includes a pair of parallel sub-rolls, a main roll placed orthogonally on the pair of sub-rolls, and A vertical movement mechanism for vertically moving the sub rolls, and a simultaneous movement mechanism for simultaneously moving the sub rolls and the main roll in the axial direction of the sub rolls. Is positioned in a horizontal state and an inclined state of an arbitrary height with respect to the reference plane at an arbitrary position.

A second invention (combined invention) relates to a positioning device, and includes a pair of parallel sub-rolls having an elliptical cross-section, and a main roll having a circular cross-section mounted orthogonally on the pair of sub-rolls. A rotation mechanism for separately rotating the respective auxiliary rolls, and a simultaneous movement mechanism for simultaneously moving the respective auxiliary rolls and the main roll in the axial direction of the auxiliary roll, the position of the main roll Is positioned at an arbitrary position on the reference surface in a horizontal state and an inclined state of an arbitrary height with respect to the reference surface.

(Embodiment of the Invention) FIG. 1 shows an embodiment of the first invention, in which auxiliary rolls 10 and 11 having circular cross sections are arranged in parallel, and the auxiliary rolls 10 and 11 are independently moved up and down. Provide a movable mechanism. Then, the main roll 20 having a circular cross section is placed at a position orthogonal to the sub rolls 10 and 11, and the detection unit 21 as described above is vertically installed on the main roll 20. The main roll and the sub roll are simultaneously provided with a mechanism for moving in the axial direction of the sub roll. With such a structure, when the detection unit 21 is set to a predetermined height with respect to the reference surface 30 as shown in FIG. 2 (A), first, for example, the auxiliary roll 10 is lowered and then the same. By lowering the auxiliary roll 11 as shown in FIG. 6B, it is possible to perform positioning at the position shown in FIG.
The main roll 20 and the auxiliary rolls 10 and 11 can be simultaneously moved in the axial direction of the auxiliary roll to be positioned at a predetermined position.
As described above, according to the device of the first aspect of the invention, the sub rolls 10 and 11 on which the main roll 20 is placed move up and down independently of each other, and the main roll 20 and the sub rolls 10 and 11 move in the sub roll axial direction. Simultaneous movement of the positions enables the detection unit 21 provided on the main roll 20 to be easily and quickly positioned at an arbitrary position on the reference surface in a horizontal state or an inclined state at an arbitrary height with respect to the reference surface. Become.

FIG. 3 shows an embodiment of the second invention. In this example, the sub-rolls 12 and 13 each have an elliptical cross-sectional shape, and the sub-rolls 12 and 13 are configured to be independently rotatable. Then, by rotating the sub roll 12 or 13, the inclination of the main roll 20 having a circular cross section and the height from the reference plane 30 installed on the sub roll 12 or 13 can be arbitrarily adjusted. It is possible to position the reference surface 30 with an arbitrary height and inclination.

4 (A) and 4 (B) show specific examples of the positioning device shown in FIG. 1. FIG. 4 (A) is a front view, and FIG. 4 (B) is the same as FIG. 4 (A). It is an II sectional view taken on the line. 100 is the whole positioning device, 106 is the main roll, 10
7,107 is the secondary roll. Both ends of the main roll 106 are placed on the sub rolls 107, 107, and the upper portions of the supporting members 108, 108, 108 on which the detection unit A is set are fitted and fixed. Both ends of the auxiliary roll 107 are fitted and fixed to the roll supporting member 105, and the handle 102 is provided on the upper end of the upper part of the roll supporting member 105.
A rod 104 having a threaded portion to which is fixed is rotatably attached. The threaded portion of the rod 104 engages with the threaded portion of the block 103, and the block 103 is fixed to the bottom end of the channel 101. Guides 112, 112 having grooves are fixed to the rear surfaces of both ends of the channel 101, and a moving member 116 having a screw portion is fixed to the rear surface of the bottom of the central portion. One angle 115, 115 is provided along the longitudinal direction of the channel 101, and both ends of the angle 115, 115 are provided at right angles to the angle 115.
The channels 110, 110 are fixed to a frame (not shown) of the printing machine. Fixed blocks 114 and 114 having through holes are fixed to the central portions of the upper surfaces of the angles 115 and 115, and a lead screw having a handle 113 fixed to one end is rotatably held on the fixed blocks 114 and 114, and the lead screw 117 is a screw portion of a moving member 116. Is engaged with. On the upper surface of the channels 110, 110, a rectangular member 1
11, 111 are fixed, and the rectangular members 111, 111 are slidably fitted to guides 112, 112 provided at both ends of the channel 101. Therefore, by rotating the handle 113, the channel 101 advances and retreats along the longitudinal direction of the channel 110, and the roll supporting members 105, 105 supported by the rods 104, 104, the main roll 106, and the detection unit set on the supporting members 108, 108, 108 are integrated. And move back and forth. Still 120,
Reference numerals 120, 120 and 120 denote guide rolls that are rotatably held by a printing machine frame (not shown), and W is a printed matter that runs along the guide rolls.

Further, when the detection unit is set on the positioning device to detect a defect of the printed matter, two positioning devices 100 are appropriately attached to the printer frame. In this case, the detection unit set in one positioning device corresponds to the detection unit 3A shown in FIG. 5, and the detection unit set in the other positioning device corresponds to the detection unit 3B in FIG.

Next, the operation of the positioning device 100 will be described. First, by rotating one of the handles 102, the rod 104 fixed to the handle 102 moves up and down, and the roll support member 105
Moves up and down. Since both ends of the main roll 106 are simply placed on the sub-rolls 107, 107, only one side of the main roll moves up and down, and only one side of the detection unit A set on the supporting members 108, 108, 108 becomes the printed matter W. By advancing and retreating with respect to each other, therefore, by rotating the handles 102, 102 alternately, the positioning that makes the gap between the detection unit A and the printed matter W constant is performed. After that, by fixing both end surfaces of the main roll 106 with stoppers (not shown),
The position of the detection unit A is fixed.

Next, the handle 113 is rotated to move the moving member 116 engaged with the lead screw 117. As a result, the channel 101 moves in the longitudinal direction of the channels 110, 110, and the rods 104, 104, the roll supporting members 105, 105, the main roll 106,
The support members 108, 108, 108 move as a unit, and the support member 1
The detection unit A set on 08, 108, 108 moves forward and backward with respect to the traveling direction of the printed matter W.
Is performed in the traveling direction of the printed matter W.

When the sub rolls 12 and 13 shown in FIG. 3 have an elliptical cross section (second invention), the sub roll elevating mechanism shown in FIG. 4 is simply changed to a rotating mechanism. The description and illustration of the columns are omitted. In this embodiment, the main and sub rolls 20, 10 and 11 have a circular cross section.
Since 10 and 11 move up and down, they are not limited to those having a circular cross section, and may have, for example, a rectangular cross section.

(Effects of the Invention) As described above, according to the positioning devices of the first and second inventions, the detection unit that can be applied to the detection of printed matter can be easily placed at any position and in any position. In addition, the positioning can be performed quickly, and the detection unit can be easily attached to the mechanism.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the first invention, FIGS. 2 (A) to (C) are views for explaining an operation example of the first invention, and FIG. 3 is an embodiment of the second invention. Structural views showing examples, FIGS. 4 (A) and 4 (B) are side views and front views showing a specific example of the first invention, and FIG. 5 (A) is an example of a printed matter detection apparatus in which the present invention can be used. FIG. 1B is a diagram for explaining the detection principle. 2 ... Sheet, 3A, 3B ... Detection unit block, 4 ...
… Control device, 10,11 …… Secondary roll, 20 …… Main roll, 21
...... Detection unit.

Claims (2)

[Claims] 1. A pair of parallel sub rolls, a main roll mounted orthogonally on the pair of sub rolls, a vertical movement mechanism for vertically moving each of the sub rolls, and The auxiliary roll and the main roll are provided with a simultaneous movement mechanism that simultaneously moves in the axial center direction of the auxiliary roll, and the position of the main roll is an arbitrary position of the reference plane and a horizontal position of an arbitrary height with respect to the reference plane. Positioning device for positioning in a tilted state and a tilted state. 2. A pair of parallel sub-rolls having an elliptical cross-section, a main roll having a circular cross-section placed orthogonally on the pair of sub-rolls, and rotating the sub-rolls separately. A rotation mechanism; and a simultaneous movement mechanism that simultaneously moves each of the sub rolls and the main roll in the axial direction of the sub roll, the position of the main roll with respect to the reference plane at an arbitrary position of the reference plane. Positioning device for positioning in a horizontal state and an inclined state at an arbitrary height.