JPS58139052A - Inspecting device for empty can - Google Patents

Abstract

PURPOSE:To prevent the occurrence of an erroneous test and to enable the detection of a trouble on a flange, by a method wherein, in case an annular light flux is projected on a rolled part flange of an empty can, a light hood, projecting further downward from a lower end of a collecting sensor, is mounted. CONSTITUTION:A light flux from an annular light source 6 is projected to a rolled part flange 8A at an opening side of an empty can 8 through an annular slit 5. A number of collecting sensors 9 are located right above the flange 8A, and a columnar light hood 10 is mounted in a manner to project downward by an appropriate length from the lower ends of the collecting sensors 9. Thus, in case the flange 8A is normal, the light flux advances straight and is not collected by the sensors 9. Further, light reflected from the inner side of the empty can 8 is shielded by the hood 10 and is not collected by the sensors 9. In case the flange is abnormal, light reflected thereform is collected by the sensors 9. This prevents the occurrence of a mulfunction which determines that it is abnormal in spite of the normality, and permits the reliable detection of a trouble.

Description

[Detailed Description of the Invention] The present invention provides an M! Inspection equipment [1 related to this]

One of the defects that occur during the process of making canned sweetfish is poor seaming. This is because the pith part is added from the outside to the 8iJ sky blue that is filled and seamed, and the flange of the pongee-wrapped cotton part, which is wide when the empty can collides with the can and stiffens and is exposed to external force, is made into a good shape. It is something that comes from life. If the flange is deformed and seamed in this condition, an old part 0) will occur as shown in Figures 1 and 2 (6), leading to false seaming and the second cause. Compared to the normal seaming shown in ), even if the can can be pierced temporarily, it will eventually become a defective can.

In order to prevent such false seaming, it is necessary to check for unusual colors on the flanges immediately before filling and reeling, but conventionally, inspection is done with a single visual inspection. It's delicious. Therefore, it is conceivable to perform an inspection using the optical inspection 5 and the pupil, but this has the disadvantage that it is difficult to distinguish between the incidence of light on the light receiver at the secant time and the incidence of light at the IA rich time, making it easy to make an inspection error.

In view of such diligence, the present invention provides a device for empty can inspection 3 that prevents #inspection errors from occurring. A floodlight that emits an annular light from diagonally above the flange of the open feed tightening part along the direction of the inscribed line of the flange is provided, and a tracing sensor arranged in a ring above the flange is installed. A light hood is provided, which is disposed within the light-receiving sensor, and whose lower end protrudes a length below the light-receiving sensor. Since the annular light beam is emitted along the direction of the inscribed line of the seventh flange, when the flange is normal, the light beam goes straight and is not received by the light receiving sensor. In addition, the light beam that has traveled straight is reflected by the inner hook surface of the empty can and attempts to enter the light receiving sensor, but the lower end of the light receiving sensor is also overfilled by the light hood that protrudes an excessive length downward, and the reflected light is will not enter the light receiving sensor, so it will not move if it is abnormal even though it is normal.Furthermore, when the flange is abnormal, 1.
The above luminous flux hits the #1 normal portion of the flange, is reflected, and enters the light receiving sensor. Therefore, if there is an abnormality in the flange,
-It is something that can be detected accurately.

Hereinafter, one embodiment of the hook of the present invention will be explained based on the eighth to following figures. (1) is a housing, and a circular hole (2) is formed in the bottom plate. (3) is W of housing (1)
It is a retaining plate fixed downward to the L root, and the concave-shaped tapered hole at the center is concentric with the circular hole (2). (4) is a center holder in which the lower end tapered part (4A) is inserted concentrically into the tapered hole of the protection plate (3), and the gap between the taper &6 (4A) and the protection plate (3) is Lower boat-shaped pickpocket, ) (A
) is formed. (.) is an annular light source disposed on the extension line of the slit in the housing (1), such as an annular fluorescent lamp, a large number of annularly arranged incandescent lamps, or light emitting diodes. In the case of fluorescent lamps, to prevent flickering, direct current lighting or ^-frequency power supply shall be used for lighting.

(7) is a conveyor for empty cans (8) moving in the direction of arrow (2), and this conveyor (7)
im (4A) The 10-volume detail flange (8A) of the empty can (8) that has been dropped is also set at a predetermined position directly below C1 so that it is positioned on the long line of the slit (6). .

(9) is a large number of light receiving sensors arranged in a ring shape on the lower surface of the tapered part (4A) without a flange, and the ring is the light receiving sensor (
9) Tapered portion (4A) f) is a cylindrical optical hood that protrudes downward from below, and its lower part protrudes excessively toward the light receiving sensor (than the lower end of QJ). Pottery
In the figure, the shaft is a shaft that amplifies the input color from each light receiving sensor (9), and has a driving wheel function of 1Ii1 to keep the sensor level constant. The box is a detection level setting device that corresponds to the brightness of the canned noodles or the light source, and the light receiving sensor ring for the detection level can be set opposite to the empty can, or each of the light receiving sensors (arranged on the chest of the season). α◆
The input signal from each cypress is detected by the level setting device.
When the input signal value from ) also becomes large, the comparator outputs the signal to G, and (to) is the input fM of each comparator (B).
The OR circuit that receives @, (2) is l1IIL that detects when the empty can (II) is at a predetermined position - directly below the taper part (4A).
8fII generation photo switch, the ring is the amplification 1 (to) that amplifies the input color of the photo switch, and the pulse generator that generates a signal based on the input color from the skeleton amplifier.
The mouse receives the input signal from the pulse generator and the input signal of the OR Ig circuit (to) and outputs it, and the output signal of the nuclear AND circuit (to) is a predetermined output signal. This is input to Hachide-suke-ro.

The effect of # above will be explained. First, when the empty can (8) is brought to the koji malt at a predetermined position directly under the center holder (4) by the conveyor (77), the light emitted from the light @ (6) follows the inside of the slit (67) as shown in the SBS diagram. An annular beam of light is projected onto the flange (aiA).Here, if the shape of the 7-lunge (8A) is 1 piece as shown in the 6-Yi green direction, the beam of light is projected onto the flange (8A). Since it is emitted almost in the direction of the inscribed line, the light beam travels straight ahead and is not received by the light receiving sensor (・). It is reflected and the light is received by the sensor (
9) tries to enter, but is overfilled by the light hood ring,
On the other hand, the light does not enter the light receiving sensor (9), so no signal is output from the light receiving sensor (9), and this empty can (8) passes under the center holder (4). Set 61 Temporary AI Flange (8AX) as shown in green
) If the shape is am, the light beam hitting the flange (8/X)-rich part is reflected and enters the light receiving sensor (September ζ).Then, the light receiving sensor (@) outputs tS at #, increasing the
The output signal is amplified by the sensor (2) and compared with the input color from the detection level setting device on the comparator axis. (2) - This signal is input. At the same time, the photoswitch ■ detects an empty can (8),
The tB number is inputted to the pulse generator (2) through the amplifier disconnection, and a pulse is emitted from the skeleton pulse generator (2). On the AND road, O! from the pulse generating ship (2)! After receiving the signal from No. I and Or Road (To), input the signal to the abnormal color discharge road 1, and discharge the Muku Itofu can [l! In the L path, for example, a cylinder device is operated to discharge an empty can (8) having an unusual flange located directly below the center holder (4) from above the conveyor (7).

As mentioned above, according to the empty can @shokuso koji of this invention, an annular beam of light is emitted from the projector almost along one direction inscribed in the flange::1 Therefore, when the flange is normal, the above The light flux advances by 1 as it is, and the light receiving sensor does not receive it.The light flux that has traveled straight is reflected inside the empty can and enters the light receiving sensor, but the lower end is one end of the light receiving sensor. The light is also filled with light by a light hood that protrudes an appropriate length downwards, and the reflected light does not enter the light receiving sensor, so there is no reason to think that it is full even though there is only one rod. When the flange is abnormal, the above-mentioned light beam hits the embroidered part of the flange and is reflected, and enters the light receiving sensor. Therefore, it is possible to reliably detect abnormalities in the flange.

[Brief explanation of drawings]

Fig. 1 is a front view of a can with a different density, Fig. 2-) is a longitudinal cross-section of the main part of a stopper can, and Fig. 2-(b) is a vertical cross-section of the main part of a can. Figure 8 and below show an embodiment of the present invention, Figure -8 is a partially cutaway front view, Figure kA4 is a diagram of the Ik section, Figure m6 is a path diagram for abnormal color detection, and Figure 6 is a diagram of the path of abnormal color detection. Enlarged vertical part of main part 1IIrth
This is an I diagram. (3)...Protective play)% (4)...Center holder, (4A)...Lower taper part, (5)...Annular slat, (6 units...Annular light TJM (light projector) ,(clause··
・Empty can, (8A)...-Mehihanakijimeitei flange, (9)
...Light receiving sensor, shout...Light hood agent Tsuruhiro Usumoto Figure 1 Figure 2 (a) Figure 4 Figure 5 Figure 6 Procedure amendment, acid April 7, 1981 Patent Application No. 21400 2,
Name of the invention Empty can inspection device 3, Relationship with the case of the person making the amendment Name of patent applicant (511) Hitachi Zosen Corporation 6, Number of inventions increased by the amendment 7, Detailed explanation of the invention in the specification subject to the amendment Column 16: Moe Book Claims, JIT1#) 2. Column O, Detailed Explanation of the Invention of Kasasa Kagi, 2eL, Line 17 - 18th stroke of the melon Correct ``tomeru'' to ``oeteru.'' 1 Claim 1: A projector is provided for the flange 7 of the opening side of the empty can at a predetermined position, and a projector is provided which emits an annular light beam from obliquely above the flange along the direction of the inscribed line of the flange. A cylindrical optical hood is provided above the flange with light receiving sensors arranged in a ring shape, and a cylindrical optical hood is disposed within the ring of the light receiving sensor and whose lower end protrudes an appropriate length below the lower end of the light receiving sensor. Empty can inspection installation featuring:

Claims (1)

[Scope of Claims] 1. A lump-like light beam is emitted from the diagonal upper blade of the flange to the mouth-side seam flange of the empty can stopped at a fixed position of 81T along the direction of the inscribed line of the flange. A light emitter for emitting light is provided, and a light receiving sensor arranged in a ring shape is provided above the flange. An empty can inspection device in which an optical hood in the form of a circular shaft is disposed within the ring of the light receiving sensor and protrudes an appropriate length in one direction from one end of the T or the lower end of the light receiving sensor. .