JP2888067B2 - Can lid reversal inspection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a can lid reversal inspection apparatus for inspecting whether or not reversal has occurred in a can lid stacked and stored inside a bag.

[0002]

2. Description of the Related Art Conventionally, a substantially disk-shaped can lid wound around an opening of a two-piece can or the like is automatically stored in a long bag in a laminated state, and the bag mouth is folded. Technology has been proposed. For example, Japanese Patent Application No. 62-221775
The technology described in the specification and the drawings of the above-mentioned publication is a method in which a large number of can lids are stacked and stored in a long, bottomed cylindrical bag, and the bag mouth of this bag is closed by so-called drug folding. .

[0003] In the above-described technique, the front and back of the can lid stored inside the bag may be turned upside down, particularly at the bottom of the bag. In this case, various problems occur in the operation of taking out the can lid from the bag and tightening it around the can body.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and it is possible to inspect whether the front and back of a can lid housed in a bag is inverted. It is an object of the present invention to provide a lid reversal inspection device.

[0005]

According to a first aspect of the present invention, there is provided a can lid reversal inspection apparatus, comprising: an inspection element which is abutted against a bottom of a bag in which a substantially disk-shaped can lid is stacked and stored; And a detection mechanism for detecting the position of the test element in a state where the test element is abutted against the bottom of the bag.

According to a second aspect of the present invention, there is provided a can lid reversal inspection apparatus according to the first aspect, wherein the can lid is provided with a counter sink portion formed by being bent in a thickness direction.
The inspection element is arranged at a position where it comes into contact with a counter sink formed on the can lid.

According to a third aspect of the present invention, there is provided the can lid reversal inspection apparatus according to the second aspect, wherein the tip of the inspection element is formed to be thin enough to be housed inside the counter sink.

According to a fourth aspect of the present invention, there is provided a can lid reversal inspection device, comprising: a positioning member positioned with respect to a can lid disposed at one end of a bag; and a positioning member attached to the positioning member and having one end. And a proximity switch installed facing the can lid arranged on the side of the unit.

[0009]

According to the inspection apparatus of the first aspect, when the can lid on the bottom side is inverted, the inspection element attached to the can lid is compared with the case where the can lid is normal. To the displaced position. Therefore, by detecting the position of the inspection element by the detection mechanism, it is possible to detect whether or not the can lid is inverted.

[0010] In the inspection apparatus according to claim 4, first,
One end of the bag containing the can lid is positioned with respect to the positioning member. Thus, one end of the bag and the proximity switch have a preset positional relationship. In this state, the proximity switch is operated. Then, a signal can be obtained from the proximity switch according to the distance between the can lid and the proximity switch. Based on this signal, it can be detected whether or not the can lid is inverted.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A can lid reversal detecting apparatus according to a first embodiment of the present invention will be described with reference to FIG. This reversing detecting device is installed in the above-mentioned conventional automatic opening device of the bag mouth, and is a bag 2 in which a large number of can lids 1 are stored in a stacked state.
Is placed with the bag opening facing upward.

First, the structure of the can lid 1 will be described.
The can lid 1 is thin and substantially disk-shaped, and has a counter sink portion 1a formed in the vicinity of the outer peripheral edge thereof, which is bent in a substantially U shape along the circumferential direction. is there. The configuration of the can lid 1 is the same as that of a conventionally used well-known one, and a detailed description thereof will be omitted.

The reversing detection device according to the present embodiment comprises a mounting plate 1 which abuts against the bottom of a bag 2 containing a can lid 1 to support the bottom.
0, a substantially U-shaped bracket 20 supporting the mounting plate 10
And a pedestal 30 disposed below the bracket 20, a support plate 40 supporting the pedestal 30 and driven in a vertical direction by a cylinder (not shown), and fixed to an inner upper surface of the bracket 20. A housing 50, a substantially cylindrical test piece 60 disposed through the housing 50 and the bracket 20 and movable in the axial direction with respect to the housing 50, and fitted to the outside of the test piece 60. A compression coil spring 70 for urging the probe 60 upward.
A collar 80 disposed on the lower surface of the bracket 20 and through which the inspection element 60 is inserted;
0 is fixed to this side while penetrating the side, and
A magnetic sensor (detection mechanism) 90 disposed with the inner surface facing the main body is mainly configured.

The placing plate 10 has a substantially disk shape, and its outer diameter is made substantially equal to the outer diameter of the bag 2. A through hole 11 is formed in the mounting plate 10 at a position corresponding to the inspection element 60 so as to penetrate in the thickness direction.
The inspection element 60 can be inserted therein. A thin disk-shaped protruding plate 12 having an outer diameter slightly smaller than the inner diameter of the counter sink portion 1a is fixed to the upper surface of the mounting plate 10.

The housing 50 is formed in a substantially cylindrical shape, so that the probe 60 can be inserted therein.

The inspection element 60 is disposed at a position where it comes into contact with a counter sink 1a formed on the can lid 1.
A ring-shaped projection 61 is fixed substantially at the center of the inspection element 60 in the axial direction. The tip (the upper end in FIG. 1) of the probe 60 is formed to be thin enough to be accommodated inside the counter sink portion 1a, and the thinned portion is a tapered portion 62.

A set screw 81 is screwed into the collar 80, and the collar 80 can be fixed to the lower end of the inspection element 60 by screwing the set screw 81.

The magnetic sensor 90 includes a protrusion 61 of the probe 60.
It is a well-known device configured to be able to measure the distance to the object. The position of the magnetic sensor 90 is opposite to the protrusion 61 of the probe 60 when the tapered portion 62 of the probe 60 is in contact with the inner surface of the countersink 1a of the can lid 1 (see FIG. 1). Both are arranged at the closest position. The output obtained from the magnetic sensor 90 is
It is input to a personal computer (not shown). The personal computer calculates the distance between the protrusion 61 of the test piece 60 and the magnetic sensor 90 according to the output from the magnetic sensor 90, and according to this distance, determines whether or not the position of the test piece 60 is abnormal. Judge. When the position of the inspection element 60 is determined to be abnormal, the operator is notified by an alarm or other means, or a predetermined mechanism is driven to remove the bag.

Next, the operation of the can lid reversal detecting device according to this embodiment will be described. First, as shown in FIG. 1, the bag 2 containing the can lid 1 is placed upright on the mounting plate 10 and the bag 2 is supported in this state using a predetermined support mechanism. Since the inspection element 60 is urged upward by the elastic force of the coil spring 70, the tapered portion 62 of the inspection element 60 is pushed into the inside of the bag 2 and is applied to the inside of the counter sink 1a. An output corresponding to the distance between the tip of the magnetic sensor 90 and the protrusion 61 in this state is obtained from the magnetic sensor 90. The position of the magnetic sensor 90 is arranged at a position closest to the protrusion 61 of the test piece 60 when the tapered portion 62 of the test piece 60 is in contact with the inner surface of the counter sink portion 1a of the can lid 1. Therefore, when the distance detected by the magnetic sensor 90 is equal to or less than a predetermined value, the probe 60 is at a prescribed position (in this example, the position where the tapered portion 62 is applied to the inside of the counter sink portion 1a). It is determined that the stacking state of the can lid 1 in the bag 2 in this state is normal.

Next, the detection operation when the lowermost can lid 1 is inverted will be described. In this case, in the state where the bag 2 is placed on the upper surface of the placing plate 10, the convex portion of the inverted counter sink portion 1 a is tapered.
Abut. Then, due to the weight of the bag 2, the inspection element 60
Is pushed down against the resilience of the coil spring 70. Therefore, the position of the protrusion 61 of the inspection element 60 is also located lower than when the can lid 1 is normal,
The distance between the protrusion 61 and the magnetic sensor 90 increases. In this state, the distance between the protrusion 61 and the magnetic sensor 90 is measured by the magnetic sensor 90, and the result is output. In this case, since the distance output from the magnetic sensor 90 becomes larger than the preset threshold value, the stacking state of the can lid 1 in the bag 2 in this state is determined to be abnormal (that is, there is reversal). Then, based on this data, the bag 2 is excluded from the line. This work may be performed by an operator, or may be performed automatically using a predetermined mechanism.

According to the apparatus of the present embodiment, whether or not the can lid 1 is inverted can be detected based on the output from the magnetic sensor 90, so that the bag 2 in which the inversion has occurred is eliminated from the line. can do. Therefore, these bags 2
Can be prevented from being supplied to the winding line, and the operation of winding the can lid can be performed smoothly.

Further, in the apparatus of this embodiment, since the inspection element 60 is disposed at a position where it comes into contact with the counter sink portion 1a formed on the can lid 1, the inspection element when the can lid 1 is turned upside down. There is an advantage that the amount of displacement can be increased, and the detection accuracy of the presence or absence of inversion is high.

Further, in the apparatus of this embodiment, since the tapered portion 62 is provided at the tip of the test piece 60, the displacement amount of the test piece 1 when the can lid 1 is inverted and when it is normal is determined. There is an advantage that the detection accuracy can be further increased and the detection accuracy can be further improved.

Next, a can lid reversal detecting apparatus according to a second embodiment of the present invention will be described with reference to FIGS. The detection device of the present example is attached to a device that folds the bag mouth with the bag 2 placed horizontally.

First, an outline of the folding device is shown in FIG.
It will be described based on. The apparatus includes a support 200, a support 201 rotatably supported by a bearing 201 mounted on an upper portion of the support 200, and extending horizontally to support the bag 2, and a support 210 for supporting the bag 2. The support table 210 is rotatably pin-connected to the lower surface of the
Tilting cylinder 220 that rotates in the forward and reverse directions about
In this embodiment, a can lid reversal detecting device is attached to an intermediate portion of the support table 210. The support 210
Is composed of two elongated support members 211 and 212 arranged in parallel as shown in FIG.

The reversing detection device of this embodiment is a contact plate 110 which abuts against the bottom of the bag 2 containing the can lid 1 and supports the bottom.
A cylinder 120 for moving the contact plate 110 back and forth along the longitudinal direction of the support table 210;
L-shaped bracket 130 for fixing the contact plate to the lower surface side of support base 210, stopper 140 for regulating the stop position of contact plate 110, and fixed to one surface near the upper end of contact plate 110 (the surface on the right side in the figure) And the housing 150 is disposed through the housing 150 and the contact plate 110,
A substantially cylindrical test element 160 which is movable in the axial direction with respect to these, and a test element 6 fixed to the housing 150.
0 and a substantially U-shaped bracket 170 supporting the probe 1
A compression coil spring 180 fitted to the outside of the bracket 60 to bias the probe 160 to the left in the figure;
A magnetic sensor (detection mechanism) 190 (see FIG. 4) fixed to the side surface of the
Reference).

The contact plate 110 is disposed so as to be inserted between the support members 211 and 212 constituting the support table 210, and is movable in the longitudinal direction of the support table 210. On the front surface (left surface in FIG. 2) of the contact plate 110, a substantially disk-shaped projection 112 is fixed. A slider 111 slidably contacting the stopper 140 is fixed to the front surface of the contact plate 110. The moving distance of the slider 111 is restricted by the stopper 140, and the slider 111 can be moved in the front-rear direction at a predetermined interval. In the apparatus of this example, the stop position in front of the slider 111 (left side in FIG. 2) is a position where the protrusion 112 of the contact plate 110 contacts the bottom of the bag 2.

The inspection element 160 has the same configuration as that of the apparatus of the first embodiment. The inspection element 160 has a projection 161 fixed to the outer periphery and a tapered portion 161 formed at the tip. At the rear end of the inspection element 160, a collar 163 is attached to the inspection element 160 by a set screw 163a.
It prevents falling off from zero.

The magnetic sensor 190 is configured to measure the distance between the probe 161 and the protrusion 161 and has the same function as the magnetic sensor 90 in the first embodiment. The position of the magnetic sensor 190 is
In a state in which the tapered portion 162 is applied to the inner surface of the counter sink portion 1 a of the can lid 1,
It is arranged at the position closest to the zero protrusion 161.
The output obtained from the magnetic sensor 190 is input to a personal computer (not shown). Other configurations are the first
Since it is the same as the device of the embodiment, the detailed description will be omitted.

Next, the operation of the can lid reversal detecting device according to this embodiment will be described. First, as shown in FIG. 2, the bag 2 containing the can lid 1 is placed horizontally on the upper surface of the support table 210, and the bag 2 is supported in this state using a predetermined support mechanism. Then, the cylinder 120 is contracted, and the contact plate 1
10 is brought into contact with the bottom surface of the bag 2. The contact plate 110 is positioned by the stopper 140 at a position in contact with the bottom surface of the bag 2. Then, since the inspection element 160 is urged leftward by the elastic force from the coil spring 180, the tapered portion 162 is applied to the counter sink portion 1a. When the can lid is normal, the tapered portion 162 enters the inside of the counter sink 1a, and the probe 60 advances to a predetermined position. An output corresponding to the distance between the tip of the magnetic sensor 190 and the protrusion 161 in this state is obtained from the magnetic sensor 190. Magnetic sensor 19
In the position of 0, the tapered portion 162 of the inspection element 160 is
When the distance detected by the magnetic sensor 190 is equal to or less than a predetermined value, it is disposed at a position closest to the protrusion 161 of the test piece 160 in a state where it is applied to the inner surface of the counter sink portion 1a. It is determined that the inspection element 160 is at a specified position (in this example, the position where the tapered portion 162 is applied to the inside of the counter sink portion 1a), and the stacking state of the can lid 1 in the bag 2 in this state is determined to be normal. to decide. This is the same as the device of the first embodiment.
Next, after extending the cylinder 120, the tilting cylinder 220 is contracted to drop the bag 2 from the support table 210,
Transfer by conveyor. After that, the tilting cylinder 22
0 is extended, the support 210 is returned to a horizontal state, another bag 2 is placed on the support 210, and the next inspection operation is performed.

Next, a description will be given of a detecting operation when the lowermost can lid 1 is inverted. In this case, when the bag 2 is placed on the support table and the contact plate 110 is in contact with the bottom of the bag 2, the convex portion of the counter sink 1 a contacts the tapered portion 162. Then, the inspection element 160 becomes
It is pushed back to the right against the elastic force of the coil spring 180. Therefore, the position of the protrusion 161 of the inspection element 160 is located to the right as compared with the case where the can lid 1 is normal,
The distance between the protrusion 161 and the magnetic sensor 190 increases.
In this state, the protrusion 161 is detected by the magnetic sensor 190.
The distance between the can lid 1 and the magnetic sensor 190 is measured, and the result is output. As in the case of the first embodiment, the stacking state of the can lid 1 is determined to be abnormal (that is, inverted), and based on this data, Thus, the bag 2 can be removed from the line.

The other operation is the same as that of the first embodiment, and its explanation is omitted.

In the apparatus of each of the embodiments described above, the probes 60 and 160 are applied to the counter sink 1a, but they may be located at other locations. In short, depending on whether or not the can lid 1 is inverted, the inspection element 60
It is sufficient that the position at which a displacement that can be detected by the sensor occurs at 160.

In the apparatus of this embodiment, the inspection element 60
Although a magnetic sensor is used as a detection mechanism for detecting the amount of displacement of 160, other types of sensors such as a photoelectric sensor may be used.

Next, a can lid reversal inspection apparatus according to a third embodiment of the present invention will be described with reference to FIGS. In the inspection apparatus of this example, similarly to the inspection apparatus of the second embodiment, with the bag 2 placed on the support 210, the bag 2
This is to detect whether or not the can lid 1 stored in the container has been inverted. In the description of the device of this example, the second
The same components as those of the embodiment are denoted by the same reference numerals, and the detailed description is omitted.

The apparatus according to the present embodiment uses the bottom (one end) of the bag 2.
A positioning member 320 positioned with respect to the can lid 1 arranged on the side 2a, and a proximity switch attached to the positioning member 320 and installed at a position facing the can lid 1 arranged on the bottom 2a side. The apparatus of the second embodiment differs from the apparatus of the second embodiment in that the apparatus is mainly configured with the inspection element 160 and the magnetic sensor 190 in the second embodiment.

The positioning member 320 is formed in a thin cylindrical shape having a cylindrical concave portion 321 formed on one end surface. The positioning member 320 is fixed to the upper surface of the plate-shaped pedestal 202 supported by the bearing 201 via a block 310. The position of the axis of the cylindrical recess 321 is
It is set so as to coincide with the axis of the can lid 1 inside the bag 2 placed on the support table 210. Positioning member 3
20 has a through hole 320a penetrating in a direction substantially along the axial direction thereof (see FIG. 6).

The proximity switch 330 is connected to the through hole 3.
20a is fitted and fixed inside. The tip of the proximity switch 330 is directed to the counter sink 1a of the can lid 1 housed on the bottom side of the bag 2. The proximity switch 330 is in a state in which the can lids 2 are normally stacked (FIG. 6).
(State shown in FIG. 3), a distance slightly larger than the distance D between the proximity switch 330 and the countersink 1a of the can lid 2 is set as a threshold value, and the can lid 2 approaches the threshold value. In such a case, it is configured to output a signal to a personal computer (not shown). The personal computer is a proximity switch 330
The tilt cylinder 220 is driven in response to a signal from the motor. In this example, a high-frequency oscillation type proximity sensor for a non-magnetic metal (for example, aluminum) is used as the proximity switch 330 so that an electric signal can be output according to the distance from the non-magnetic metal. Has become. Further, the proximity switch 330 does not respond to the paper constituting the bag 2. Such proximity switches themselves are already known.

Next, the operation of the apparatus of this embodiment will be described. First, in the same manner as in the apparatus of the second embodiment, the support 21
The bag 2 containing the can lids 1 stacked and stored is placed on the upper part of the bag. Next, the open end 2b of the bag 2 is folded, and the inner surface of the cup is pressed against the open end 2b to round the outer periphery of the open end 2b. By pressing the cup, the bag 2 slides on the upper surface of the support 210 and moves toward the positioning member 320. Then, the bottom 2a of the bag 2 is housed inside the recess 320, and as shown in FIG. 6, the can lid 2 located on the side of the bottom 2a contacts the inner surface of the recess 320, and the movement of the bag 2 is stopped. When the can lid 2 is normal (when it is not inverted), the distance D between the can lid 2 and the proximity switch 330 is
The proximity switch 330 outputs a signal to the personal computer because it becomes smaller than a preset threshold value. At this time, the personal computer issues a control signal as follows. That is, after the cup pressed against the opening end 2b is removed, the tilting cylinder 220 is driven so that the support table 210 moves to a position corresponding to a chute for sending out a normal bag 2, and this chute is driven. Send bag 2 to

Next, the operation when the can lid 2 on the bottom 2a side is inverted will be described with reference to FIG. Also in this case, the bottom 2a of the bag 2 is
Press against the inner surface of 1. When the can lid 2 is inverted, the distance D between the can lid 2 and the proximity switch 330 does not reach the set threshold value.
Is not output. If no signal is output for a certain period of time after the bag 2 is pressed into the recess 321, the personal computer determines that the can lid 2 is inverted and issues a control signal as follows. That is, the opening end 2b
After the cup pressed against the discharge chute is driven, the tilt cylinder 220 is driven to move the support table 210 to a position corresponding to the discharge chute for discharging the inverted bag 2 from the line. The bag 2 is fed and removed from the line. Other operations are the same as those of the device of the second embodiment, and the detailed description is omitted.

[0041]

The can lid reversal inspection apparatus according to claim 1 is
An inspection element that is abutted against the bottom of a bag in which a substantially disk-shaped can lid is stacked and stored, and a detection mechanism that detects the position of the inspection element when the inspection element is abutted against the bottom of the bag. Therefore, it is possible to detect whether or not the can lid is inverted by detecting the position of the inspection element applied to the can lid by the detection mechanism. Therefore, the bag in which the reversal has occurred can be eliminated from the line, and the work of winding the can lid can be performed smoothly.

According to a second aspect of the present invention, there is provided the can lid reversal inspection apparatus according to the first aspect, wherein the can lid is provided with a counter sink portion formed by being bent in a thickness direction.
Since the inspection element is arranged at a position where it comes into contact with a counter sink formed on the can lid, the displacement of the inspection element when the can lid is inverted can be increased, and The detection accuracy of presence / absence can be improved.

According to a third aspect of the present invention, in the reversing inspection device for a can lid, the tip of the inspection element is formed thin enough to be accommodated in the counter sink portion. It is possible to further increase the displacement amount of the probe between the case where it is reversed and the case where it is normal, and it is possible to further improve the detection accuracy.

According to a fourth aspect of the present invention, there is provided a can lid reversal inspection device, comprising: a positioning member positioned with respect to a can lid disposed at one end of a bag; A proximity switch installed opposite to the can lid disposed on the side of the unit, so that a bag in which the can lid on the bottom side is inverted can be detected in the same manner as the inspection device according to claim 1. Can be. Further, the mechanical configuration is simple and the operation is reliable, and the practical value is high.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a main part of a can lid reversal inspection apparatus according to a first embodiment of the present invention.

FIG. 2 is a front view of an essential part of a bag mouth folding device provided with a can lid reversal inspection device according to a second embodiment of the present invention.

FIG. 3 is an enlarged sectional view taken along line AA of FIG. 2;

FIG. 4 is an enlarged view of a main part as viewed in the direction of arrow B in FIG. 2;

FIG. 5 is a front view of a can lid reversal inspection apparatus according to a third embodiment of the present invention.

FIG. 6 is a sectional view of a positioning member used in the third embodiment.

FIG. 7 is a sectional view of a positioning member used in the third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Can lid 1a Counter sink part 2 Bag 2a Bottom part (one end of bag) 60/160 Inspector 62/162 Tapered part of inspector 90/190 Magnetic sensor (detection mechanism) 320 Positioning member 330 Proximity switch

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tadashi Matsumoto 1500, Suganuma, Koyama-cho, Sunto-gun, Shizuoka Prefecture Mitsubishi Aluminum Co., Ltd. Aluminum Can Development Center (72) Inventor Jun Takasugi 1500, Suganuma, Koyama-cho, Sunto-gun, Shizuoka Mitsubishi Material Co., Ltd. Aluminum Can Development Center (58) Field surveyed (Int. Cl. ⁶ , DB name) B65B 57/00-57/20

Claims (4)

(57) [Claims] 1. A test piece which is brought into contact with the bottom of a bag in which a substantially disk-shaped can lid is stacked and stored, and the test piece in a state where the test piece is brought into contact with the bottom of the bag. And a detecting mechanism for detecting the position of the can lid. 2. The can lid includes a counter sink portion formed by being bent in a thickness direction, and the inspection element is disposed at a position where it comes into contact with a counter sink portion formed on the can lid. 2. The can lid reversal inspection device according to claim 1, wherein: 3. The can lid reversal inspection apparatus according to claim 2, wherein a tip of the inspection element is formed to be thin enough to be housed inside the counter sink portion. 4. A positioning member that is positioned with respect to a can lid disposed at one end of a bag in which a substantially disk-shaped can lid is stacked and housed, and attached to the positioning member. A proximity switch disposed opposite to the can lid disposed on the one end side, and detecting whether or not the can lid is inverted based on an output of the proximity switch. Inversion inspection device for can lids.