JP4472895B2 - Printing surface inspection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a printing surface inspection apparatus in which light is emitted from a light emitting element onto a printing surface conveyed in a predetermined direction, and reflected light from the printing surface is received by a light receiving element to inspect the printing surface.
[0002]
[Prior art]
Conventionally, an apparatus for inspecting a printing surface by applying light emitted from a light emitting element to a printing surface and receiving the reflected light by a light receiving element is known, and various devices have been proposed by the present applicant.
[0003]
In an example of such a printing surface inspection apparatus, a cover extending along the axis of a roller that guides the printing surface, a plurality of light emitting elements arranged in the cover, and arranged corresponding to the light emitting elements The sensor has a sensor including a plurality of light receiving elements.
[0004]
[Problems to be solved by the invention]
In such a conventional printing surface inspection apparatus, rollers having various diameters are used depending on printing conditions, and it is necessary to attach a sensor corresponding to each roller.
[0005]
SUMMARY OF THE INVENTION An object of the present invention is to provide a printing surface inspection apparatus in which a sensor of a printing surface inspection apparatus can be easily attached corresponding to rollers of various calibers.
[0006]
[Means for Solving the Problems]
If the solution of this invention is illustrated, it will be a printing surface test | inspection apparatus of Claims 1-4 .
[0007]
DETAILED DESCRIPTION OF THE INVENTION
In a preferred embodiment of the present invention, the printing surface inspection apparatus has a mechanism for attaching / detaching the sensor, that is, an attaching / detaching mechanism, and rotates the sensor within a predetermined rotation angle between the attaching / detaching mechanism and the sensor. Provide a stopper to support it so that it can be stopped. Further, the attachment / detachment mechanism linearly moves the sensor via the stopper.
[0008]
It is preferable that a cylinder shaft and a slide base are provided in the attachment / detachment mechanism, and a floating joint is provided between them. It is preferable to prevent the cylinder shaft from being displaced relative to the slide base by the floating joint.
[0009]
A sensor having a light emitting element and a light receiving element, emitting light from the light emitting element to a printing surface conveyed in a predetermined direction at an inspection position, and receiving light reflected from the printing surface by the light receiving element, and inspection of the sensor An attachment / detachment mechanism that reciprocates the sensor between a position and an attachment / detachment position away from the position and attaches / detaches the sensor at the attachment / detachment position of the sensor. An adjustment member for adjusting the height is included in the attachment / detachment mechanism.
[0010]
The fluid cylinder piston mechanism reciprocates the sensor between the sensor attaching / detaching position and the inspection position.
[0011]
The adjusting member is constituted by a screw.
[0012]
A pair of slide shafts arranged in parallel to each other and a slide base which is slidable along these slide shafts and reciprocates between the attachment / detachment position and the inspection position together with the sensor are provided in the attachment / detachment mechanism. It is done.
[0013]
A fluid cylinder piston mechanism for reciprocating the sensor and a floating joint for allowing the sensor to be slightly inclined (for example, about 10 °) when the sensor is attached or detached are provided.
[0014]
Stoppers for supporting the sensor in a rotatable and stopable manner are provided on both sides of the sensor, and the attachment / detachment mechanism supports the sensor through the stopper.
[0015]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0016]
FIG. 1 shows an example of a main part of the printing surface inspection apparatus of the present invention.
[0017]
The sensor 10 constituting the main part of the printing surface inspection apparatus is disposed near the roller 12 of the printing press along the axis direction of the roller 12 (direction of arrow A). A printed surface S (not shown) of the printed material is positioned on the roller 12 in a running state as inspected by the sensor 10. The sensor 10 inspects the printing surface S of the printed material that is guided by the roller 12 and is moving (running).
[0018]
The sensor 10 has a cover 16 extending in the direction of arrow A on the outside. Two light shielding plates 18 are attached below the cover 16. The cover 16 and the light shielding plate 18 prevent external light from entering the sensor 10.
[0019]
End plates 20 are attached to both side surfaces perpendicular to the direction of arrow A of the cover 16. The end plate 20 is provided with a hole 22 for power and signal lines and a rotating body 24 for supporting the sensor 10 from the outside.
[0020]
A sensor unit 14 is disposed inside the cover 16.
[0021]
In the illustrated example, a plurality of sensor units 14 are continuously arranged along the direction of arrow A.
[0022]
Within each sensor unit 14, there are a plurality of light emitting elements arranged at predetermined intervals along the direction of arrow A, and a plurality of light receiving elements arranged at predetermined intervals precisely corresponding to these light emitting elements. Is provided. Each light emitted from each light emitting element is applied to the printing surface S, and each reflected light is received by a corresponding light receiving element, thereby inspecting the printing surface S.
[0023]
FIG. 2 schematically shows an example of the configuration of the sensor unit 14 and its periphery.
[0024]
In the illustrated example, four sensor units 14 are provided along the arrow A direction.
[0025]
Each sensor unit 14 can be individually removed and repaired or adjusted.
[0026]
A central frame 26 is disposed on the back surface of the sensor unit 14. The center frame 26 is fixed to the cover 16 and the end plate 20 (not shown in FIG. 2). The sensor unit 14 is attached to the central frame 26.
[0027]
A plate 28 is provided below the sensor unit 14 in the horizontal direction. The material of the plate 28 is preferably glass. The plate 28 passes light and protects the sensor unit 14.
[0028]
The plate 28 is supported by two frames 30 along the arrow A direction. One frame 30 is fixed to the central frame 26. The other frame 30 is fixed to the cover 16 via a cover mounting bracket 32.
[0029]
FIG. 3 shows an example of a stopper suitably used in the printing surface inspection apparatus of the present invention. FIG. 4 shows an example in which the stopper shown in FIG. 3 is attached to the sensor. The following description of the stopper will be made only for the sensor used on the right back side of the sensor shown in FIG. 1, and the function on the left front side will be omitted since it has almost the same function.
[0030]
The stopper 168 has two rods 172. The two rods 172 are arranged perpendicularly with respect to the surface of the plate 170. The two rods 172 are supported by an attachment / detachment mechanism 190 described later.
[0031]
The stopper 168 is used to engage the rotating body 24 of the sensor 10 to support the sensor 10 in a rotatable and stopable manner. Note that a specific description of the portion of the stopper 168 that is not directly related to the present invention will be omitted.
[0032]
FIG. 5 shows an example of an attachment / detachment mechanism used in the printing surface inspection apparatus of the present invention.
[0033]
The attachment / detachment mechanism 190 mainly includes a fluid cylinder piston mechanism 192 and a slide base 194 disposed below the fluid cylinder piston mechanism 192.
[0034]
The fluid cylinder piston mechanism 192 is constituted by an air cylinder in the illustrated example, and has two speed controllers 196 on one side surface. The two speed controllers are connected to an air source (not shown), and the fluid cylinder piston mechanism 192 is controlled by air.
[0035]
A cylinder mounting bracket 198 is fixed below the fluid cylinder piston mechanism 192 so as to receive the lower surface of the fluid cylinder piston mechanism 192. The cylinder mounting bracket 198 is composed of an elongated plate extending in the horizontal direction, and the vicinity of both long sides thereof is slightly bent downward.
[0036]
A slide base 194 is installed below the cylinder mounting bracket 198 with a space therebetween. The slide base 194 is composed of thick plates arranged vertically.
[0037]
Two bearings 200 are arranged on the back surface of the slide base 194 with a gap in the horizontal direction. The two bearings 200 are fixed to the back surface of the slide base 194 by bolts 202, respectively. When the bearing 200 is attached to the slide base 194, the bearing 200 constitutes the floating joint 222.
[0038]
The bearing 200 has a hole 204 penetrating in the horizontal direction at the center. The hole 204 corresponds to the diameter of the rod 172 of the stopper 168 and receives the rod 172. The bearing 200 can float and allows the shaft 172 to move obliquely about 10 ° vertically and horizontally. The bearing 200 functions as a floating joint.
[0039]
On the front surface of the slide base 194, two elliptical long holes 206 extending in the vertical direction are arranged with a space therebetween. The center of the long hole 206 is located coaxially with the center of the hole 204 of the bearing 200 provided on the back surface of the slide base 194. The elliptical long hole 206 operates properly even assuming that the sensor 10 is slightly inclined (for example, about 10 °) due to imbalance between the left and right fluid cylinder piston mechanisms 192 when the sensor 10 is attached and detached. It is provided as follows.
[0040]
Slide shafts 208 and 209 are provided near both short sides of the cylinder mounting bracket 198. The upper ends of the slide shafts 208 and 209 are fixed to the cylinder mounting bracket 198 with bolts 210. The lower ends of the slide shafts 208 and 209 are fixed to a shaft holder B 214 (described later) provided below the slide base 194. The slide shafts 208 and 209 pass through a guide hole 216 provided in the vicinity of the left and right ends of the slide base 194 and penetrating in the vertical direction. A bush (not shown) is provided on the inner surface of the guide hole 216. The slide base 194 smoothly reciprocates in the vertical direction along the slide shafts 208 and 209 via bushes.
[0041]
In the illustrated example, an adjustment member 217 is provided inside the slide shaft 208 on the right front side. The adjusting member 217 is constituted by a screw in the illustrated example. The upper portion of the adjustment member 217 protrudes upward from the upper surface of the cylinder mounting bracket 198, and a hard lock nut 218 is fastened to the protruding portion. The lower part of the adjustment member 217 is connected to a screw hole (not shown) provided in the slide base 194. A nut 220 is provided on the upper surface of the slide base 194 below the adjustment member 217. The nut 220 is for fixing the adjustment member 217 to the slide base 194.
[0042]
In the illustrated example, a floating joint connector 224 and a floating joint flange 226 are provided inside the slide shaft 209 on the far left side.
[0043]
FIG. 6 shows an example of an exploded view of the floating joint connector 224 and the floating joint flange 226.
[0044]
The floating joint connector 224 includes a cylindrical small-diameter portion 224a and a cylindrical large-diameter portion 224b provided coaxially therebelow.
[0045]
A hole 224c facing upward is provided at the center of the small diameter portion 224a. The hole 224c is connected to the cylinder shaft 193 protruding downward from the cylinder 192 through the cylinder mounting bracket 198.
[0046]
The large-diameter portion 224 b has a smaller axial thickness than the small-diameter portion 224 a, and its lower surface is configured as a surface that presses the upper surface of the slide base 194.
[0047]
The floating joint flange 226 has a hole 226a penetrating in the vertical direction at the center. The hole 226a has a diameter corresponding to the small diameter portion 224a and the large diameter portion 224b of the floating joint connector 224. The hole 226 a passes the small-diameter portion 224 a of the floating joint connector 224 upward of the floating joint flange 226 and holds the large-diameter portion 224 b inside the floating joint flange 226. The floating joint flange 226 is fixed to the slide base 194 with bolts 228 in a state where the floating joint connector 224 is held inside.
[0048]
By using the floating joint connector 224 and the floating joint flange 226, it is possible to eliminate the problem of cylinder driving due to the axial displacement of the cylinder shaft 193 and the slide base 194 disposed at a position slightly displaced from the center of the upper surface of the slide base 194. It has become.
[0049]
A shaft holder A 212 and a shaft holder B 214 are provided below the slide base 194.
[0050]
The shaft holder A212 is disposed at the lower end of the attachment / detachment mechanism 190, and is fixed to a shaft holder B214 provided thereabove using bolts (not shown).
[0051]
The shaft holder B214 has two support portions 214a and 214b on the left and right, respectively. The support portions 214a and 214b are arranged at an interval in the vertical direction.
[0052]
The upper support portion 214 a is fixed to the lower ends of the slide shafts 208 and 209. The lower support portion 214b is fixed to the shaft holder A212 with bolts.
[0053]
Indentations 212a and 214c are provided on opposing surfaces of the shaft holder A212 and the shaft holder B214 so as to face each other. Set collars 232 and 234 are fixed to the back surfaces of the shaft holder A 212 and the shaft holder B 214 by bolts 236, respectively. The depressions 232a and 234a provided on the opposing surfaces of the set collars 232 and 234 correspond to the depressions 212a and 214c of the shaft holder A 212 and the shaft holder B 214, respectively.
[0054]
7 and 8 show an example in which the attachment / detachment mechanism 190 is attached to the sensor 10 via the stopper 168. FIG. FIG. 7 shows an example of a position (hereinafter referred to as an inspection position) for the sensor 10 and the roller 12 to approach and inspect the print surface. FIG. 8 shows an example of a position (hereinafter referred to as an attaching / detaching position) where the sensor 10 and the roller 12 are separated and the sensor 10 is attached / detached.
[0055]
When the height of the sensor 10 is adjusted downward, for example, at the inspection position, the hard lock nut 218 is disposed above the adjustment member 217 by a predetermined amount. The slide base 194 is moved downward using the fluid cylinder piston mechanism 192. The hard lock nut 218 functions as a stop member at a desired position, and stops the movement of the slide base 194. Thus, the height of the sensor 10 can be adjusted downward.
[0056]
When the sensor 10 is attached / detached at the attaching / detaching position, the slide base 198 is moved upward (preferably most upward) so that the roller 12 and the sensor 10 are separated from each other. Thus, the sensor 10 can be safely attached and detached.
[0057]
【The invention's effect】
According to the printing surface inspection apparatus of the present invention, the height of the sensor can be adjusted according to the diameters of various rollers. Therefore, the sensor can be accurately and easily attached to an appropriate position with respect to rollers having different diameters. Further, since the sensor can be attached / detached at the attachment / detachment position away from the inspection position, the sensor can be attached / detached safely.
[Brief description of the drawings]
FIG. 1 is a perspective view schematically showing an example of a main part of a printing surface inspection apparatus according to the present invention.
2 is an exploded view showing an example of a configuration inside a sensor of the printing surface inspection apparatus shown in FIG. 1. FIG.
FIG. 3 is a perspective view showing an example of a stopper suitably used in the printing surface inspection apparatus of the present invention.
4 is a diagram showing an example of a state in which the stopper of FIG. 3 is attached to a sensor.
FIG. 5 is a view showing an example of an attachment / detachment mechanism used in the printing surface inspection apparatus of the present invention.
6 is a view showing an example of a floating joint connector and a floating joint flange of the attachment / detachment mechanism of FIG. 5;
FIG. 7 is a perspective view showing an example of a printing surface inspection apparatus according to the present invention.
8 is a diagram illustrating a state in which a sensor of the printing surface inspection apparatus in FIG. 7 is moved upward.
[Explanation of symbols]
10 Sensor 12 Roller 14 Sensor unit 16 Cover 18 Light shielding plate 20 End plate 22 Hole 24 Rotating body 26 Central frame 28 Plate 30 Frame 32 Cover mounting bracket 168 Stopper 172 Rod 190 Attachment / detachment mechanism 192 Fluid cylinder piston mechanism 193 Cylinder shaft 194 Slide base 196 Speakon 198 Cylinder mounting bracket 200 Bearing 202, 228 Bolt 206 Slotted hole 208, 209 Slide shaft 212 Shaft holder A
212a, 214c, 232a, 234a Recess 214 Shaft holder B
216 Guide hole 217 Adjustment member 218 Hard lock nut 220 Nut 222 Floating joint 224 Connector 224a Small diameter portion 224b Large diameter portion 224c, 226a Hole 226 Flange 232, 236 Set collar

Claims (4)

A printing surface inspection apparatus to which a sensor (10) can be attached in accordance with the diameter of a roller (12), which has a light emitting element and a light receiving element and is conveyed in a predetermined direction at an inspection position A sensor (10) that emits light from the light emitting element and receives light reflected from the printing surface by the light receiving element; an inspection position of the sensor (10); The attachment / detachment mechanism (190) moves the sensor (10) to the attachment / detachment position by reciprocating the sensor (10) between them and attaching / detaching the sensor (10) at the attachment / detachment position where the sensor (10) is attached / detached. The adjusting member (217) for adjusting the height of the inspection position of the sensor (10) is included in the attachment / detachment mechanism (190), and the sensor (10) is provided on both sides of the sensor (10). Rotating and stopping The stopper (168) provided for supporting the ability sensor between the via stopper (168) detaching mechanism (190) is to support the sensor (10), the fluid cylinder piston mechanism (192) is a detachable position and the inspection position A printing surface inspection apparatus characterized by reciprocating (10) .   The printing surface inspection apparatus according to claim 1, wherein the adjustment member is formed of a screw. A pair of slide shafts (208, 209) arranged in parallel to each other, and slidable along these slide shafts (208, 209), and a sensor (10) between the attachment / detachment position and the inspection position printing surface inspection apparatus according to any one of claims 1 to 2, and the slide base which reciprocates (194) is characterized in that provided in the detachable mechanism (190) together. The printing surface inspection apparatus according to any one of claims 1 to 3 , further comprising a floating joint (222) that allows the sensor (10) to be slightly inclined when the sensor (10) is attached or detached.

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