JPH10160417A - Method and device for detecting defective anode - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for detecting defective anode, by which a defective anode can be detected safely and surely with high accuracy when the method is applied to the casting process of anodes, particularly, a shoulder type anode. SOLUTION: In the method for detecting defective anode, the shapes of hanging sections A2 and A2 , which are formed integrally with the electrode plate section A1 of a shoulder type anode A which is cast at a prescribed position of a mold 2 set on a turntable 1 that is continuously rotationally moved in the peripheral direction. After the hanging sections A2 and A2 are exposed by partially pushing up the cast anode A from the mold 2, the heights of the sections A2 and A2 and the sizes of the sections A2 and A2 in the longitudinal direction of the anode A are measured with laser range finders 10 and 11 provided above the exposed hanging sections A2 and A2 . Then, the defectless/ defective condition of the anode A is discriminated by detecting the warp of the anode A and presence/absence of burrs at the upper ends of the sections A2 and A2 . When a defective anode is discriminated, the anode is rejected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for detecting a defective product by observing the shape of the product such as casting without contacting the product during a manufacturing process.

[0002]

2. Description of the Related Art In general, it is extremely important to efficiently extract defective products in a product manufacturing process from the viewpoint of improving productivity. For example, blister copper anode is used for electrolytic refining of copper. Among them, the one in which the electrode plate portion and the handle portion are integrally cast is called a so-called shoulder type anode, and the electrode plate portion and the handle portion are connected via the handle portion in the electrolytic cell. Since the shoulder-type anode is suspended and electric power for electrolysis is supplied, the hanging portion greatly affects the quality of the shoulder-type anode as a product.

In the production of such a shoulder type anode, a blister copper melt to be continuously supplied from a refining furnace for several hours is weighed by a measuring pan by a predetermined weight for each mold arranged on a turntable at a predetermined pitch. After that, the molten metal is cooled, solidified, removed from each mold by a peeling device, and then arranged in a predetermined number and transferred to the next step. However, if the temperature or components of the blister copper melt become non-uniform in the casting process, the thickness of the shoulder-type anode as a casting will vary and become outside the specification, or so-called casting or distortion will occur. In any of these cases, there is a disadvantage that the operation of electrolytically operating the shoulder type anode is hindered, for example, deformation or nesting occurs in the part.

Therefore, it is necessary to judge the quality of casting in order to remove such a shoulder-type anode from the casting process as a defective product and to melt it again. Therefore, in an extremely high temperature environment, the operator visually judges the quality of the casting and performs the work of extracting the defective anode, which not only seriously impairs safety and health, but also causes the shoulder to be cast due to severe working conditions. It was difficult to obtain sufficient measurement accuracy for the mold anode.

[0005] Japanese Patent Publication No. 5-79126 discloses a method in which a shoulder-type anode is imaged by a television camera without visual observation, and its quality is safely identified. This technology utilizes the fact that the frequency of occurrence of defective products is highest in the hanging part, and that this hanging part is the part that is most likely to measure dimensions etc. even during the casting process, especially when moving. It was done.

[0006] The method disclosed in Japanese Patent Publication No. 5-79126 discloses a method in which, as shown in FIG. cast a shoulder-type anode a (hereinafter, simply referred to as "anode") an electrode plate a ₁ and integral hanger portion a ₂ of the shape detection method in, the cast and the anode a mold 2 exposing the hanger portion a ₂ pushes up a portion from the inner, and is a plane shape and side shape of the exposed hanger portion a ₂ intended for imaging by the TV camera 4, 5 (6,7).

Signals picked up by the television cameras 4 and 5 are subjected to image processing, and as shown in FIGS. 11A and 11B, the visual fields 4a and 5 of the television cameras 4 and 5, respectively.
In a, specific dimensions y ₁ , y ₂ , y ₃ and z ₁ ,
z ₂ , z ₃ are compared with the corresponding set dimensions in the standard shape of the preset shape, and based on the comparison result, the plane shape A ₂ a of the hanging portion A (see FIG. 11A). And the quality of the side shape A ₂ b (see FIG. 11B).

[0008]

However, the method disclosed in Japanese Patent Publication No. 5-79126 has various problems as described below. That is, first,
After cooling, the hanging part (ear) of the anode is black, and since the color and the temperature are not so different between the hanging part and the mold (mold), the hanging part and the mold are distinguished by the color or the temperature by the television camera. It is difficult and the accuracy is poor. Further, in the field of anode casting, in which judgment must be made every few seconds in order to perform advanced image processing, a large and expensive computer is required, and the equipment cost increases.

Further, the television camera for capturing an image of the side surface of the hanging portion needs to be installed at a place away from the hanging portion so as not to interfere with the electrode plate portion of the anode. It gets worse and unrealistic. The height of the TV camera, which captures the flat part of the hanging part, also needs to be set so that the TV camera does not interfere with the anode when the anode is pushed up. Gets worse. As described above, in the measurement by the television camera, if the distance between the television camera and the object to be measured (the hanging part) becomes long, the measurement accuracy becomes extremely poor and the reliability is poor.

[0010] In addition, the television camera has to be installed at a place far away from the anode in order to minimize the influence of heat because no measures such as cooling and heat insulation are taken. Affected by disturbances such as steam,
Detection errors occur frequently and the reliability is extremely low.

The present invention has been made in view of the above-mentioned problems of the prior art, and is particularly applicable to the casting process of a shoulder type anode, which is safe, has high accuracy in determining good / bad, and has a low apparatus cost. It is an object of the present invention to provide a method and an apparatus for detecting a defective anode which is not bulky.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a shoulder type anode cast at a predetermined position with respect to a mold installed on a turntable which continuously rotates in a circumferential direction. A method for detecting the shape of a hanging portion integrated with an electrode plate portion in the above, wherein the cast shoulder type anode is partially pushed up from inside a mold to expose the hanging portion, and the exposed hanging portion is exposed. By continuously measuring the distance between the laser range finder and the hanging portion by a laser range finder placed above the height of the hanging portion and the length of the shoulder type anode of the hanging portion. It is characterized by determining dimensions in the direction and comparing these with a preset reference height and reference dimensions to determine the quality of the shoulder type anode.

A plurality of the laser range finder are installed in the width direction of the shoulder type anode with respect to one hanging portion, so that the plurality of laser range finder can be used in accordance with a detection pattern of the hanging portion by the plurality of laser range finder. Then, the displacement of the mold, the casting in the direction orthogonal to the direction of rotation of the turntable of the hanging part, and the like are detected.

The apparatus for detecting a defective anode according to the present invention is integrated with an electrode plate portion of a shoulder type anode cast at a predetermined position with respect to a mold provided on a turntable which is continuously rotated and moved in a circumferential direction. A lifting mechanism for partially extruding the cast shoulder-type anode from the inside of the mold to expose the hanging portion, and a device for detecting the shape of the formed hanging portion. A laser distance meter arranged continuously above the hand portion, for continuously measuring the distance with the hanging portion, based on data measured by the laser distance meter, the height position of the hanging portion and Determination of the quality of the shoulder type anode by determining the length of the shoulder type anode in the length direction of the shoulder type anode, and comparing these with a preset reference height position and reference size. It is characterized in that comprises a control unit that, the.

A plurality of the laser range finder are installed in one shoulder portion in the width direction of the shoulder type anode, and the control means controls the hanging portion by the plurality of laser range finder. By inputting the detection pattern, displacement of the mold and casting in a direction orthogonal to the rotation direction of the turntable of the hanging portion are detected.

Further, cooling means for cooling the laser range finder, a protection member surrounding the optical path of the laser range finder between the laser range finder and the hanging portion, and a high pressure High-pressure air supply means for supplying air.

According to the operation of the present invention, the distance between the hanging part and the mold is clearly measured by measuring the distance between the hanging part and the mold by using a laser distance meter disposed above the hanging part. The height position of the hanging portion and the dimension of the hanging portion through which the laser distance meter passes can be measured with high accuracy, and there is no need to measure from the side surface of the hanging portion as in the related art. Further, it is not necessary to perform complicated processing such as conventional image processing on the measurement value by the laser distance meter, and it is possible to determine the quality of the hanging portion only by comparing the measurement value with the reference value. Further, the laser distance meter has a small decrease in measurement accuracy and is excellent in reliability, even when the distance to the object to be measured (hanging portion) is long, as compared with a television camera. Then, by cooling the laser range finder, the laser range finder is brought as close as possible to the hanging portion, and by purging steam or the like on the optical path of the laser range finder with high-pressure air, adverse effects due to disturbance can be reduced.

[0018]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view for explaining the arrangement of a laser distance meter of the apparatus for detecting a defective anode of the present invention, FIG. 2 is a side view in which a main part of FIG.
FIG. 3 is a plan view of the anode and the laser distance meter of FIG. 1 as viewed from above.

As shown in FIGS. 1 to 3, reference numeral 1 denotes a turntable which is intermittently driven to rotate at a predetermined pitch angle (see an arrow θ). The transmission is performed via a transmission mechanism K (see a chain line). Reference symbol E in FIG. 2 indicates an encoder described below for detecting the rotation angle of the turntable 1. The encoder E is connected to a control unit (data processing device) 30 shown in FIG. Reference numeral 2 is disposed on the turntable 1 at a predetermined pitch along its circumferential direction (only one location is shown in the drawing), and a blister copper melt is injected from a refining furnace (not shown). By doing so (hereinafter, this pouring portion is referred to as a pouring station for the turntable 1), a mold for casting the anode A is provided. The anode A, a pair of hanger portions A _2, A ₂ projecting electrode plate A ₁ and upper surface side, the template by stripping after cooling and solidification of the inside mold 2 (not shown) 2 from removed and it is transferred to the electrolytic cell for the next step, in which hanger unit a _2,
It is caused to suspension in the hanger means of the transfer device or electrolytic device via the A _2.

Reference numeral 3 denotes a mold that is slidably mounted on the turntable 1 in the vertical direction in FIG.
Is a push-up rod fitted into the concave portion 2a at the bottom of the push rod. The push-up rod 3 is located at a position where the detecting device described later is disposed after the mold 2 has passed through the pouring station and at least after the anode A inside the cooling station has been cooled and solidified. When it is brought in, the lower end 3b is pushed upward as shown in FIG. 2 by a cylinder or the like (not shown) arranged at an appropriate position below the turntable 1 so that the upper end 3a moves over the anode A. It is operated so that it can be pushed up to hold the hanging parts A ₂ , A ₂ at a certain height at least above the upper surface of the mold 2. The push-up rod 3 and the cylinder (not shown) constitute a push-up mechanism.

Reference numerals 10, 11, 12, and 13 denote triangulation (triangulation) laser distance meters provided at the measuring stations above the hanging portions A ₂ , A ₂ of the anode A. Each of the laser rangefinders 10, 11, 12, and 13 is supported by a detection device main body H (see FIG. 3). The first and second laser rangefinders 10 and 11 are provided with hanging portions A ₂ and A _2.
It is provided so as to face the upper surface, and continuously measures the distance to the hanging portions A ₂ , A ₂ . The second and fourth laser distance meters 11 and 13 are disposed symmetrically with respect to the first and third laser distance meters 10 and 12 with respect to the central axis in the longitudinal direction of the anode A. Each of the laser rangefinders 10, 11, 12, and 13 is connected to a control unit (data processing device) 30 shown in FIG.

As shown in FIG. 8, triangulation (triangulation)
The laser range finder 10 (11, 12, 13) of the type is configured by combining a light emitting element 31 and a light position detecting element 34 inside an exterior 37. Specifically, as the light emitting element 31, a light emitting diode or a semiconductor laser is used,
The light of the semiconductor laser 31 is condensed through the light projecting lens 32 and is irradiated on the object to be measured (in this example, the hanging portion A ₂ ). Then, a part of the light beam diffusely reflected from the measurement object forms a spot on the light position detecting device 34 through the light receiving lens 33. When the measuring object moves, the optical position detecting device 3
By moving the spot on 4 and detecting its position,
The displacement amount of the measurement object can be known. Reference numerals 35 and 36 denote a driving circuit of the semiconductor laser 31 and a signal amplifying circuit for amplifying a signal from the optical position detecting device 34, respectively. Here, a semiconductor laser having a long life, being inexpensive, and having little danger is used as the light emitting element 31, but is not limited thereto, and a gas, a liquid, or a solid laser may be used.

It is conceivable to use a lightwave rangefinder instead of a laser rangefinder. However, the phase difference measurement type cannot measure because the reflected light is too weak, and the time measurement type has extremely high accuracy. Bad, none could be used.

As shown in FIG. 5, the first and second laser rangefinders 10 (11) are provided with their corresponding hanging portions A.
By measuring the distance b between _2, A _2, this measurement is input to the control unit 30 (see FIG. 9) described later. The control unit 30, the distance limit b ₂ and the lower limit value b ₁ to determine the allowable range of b is set, the distance b is whether between upper limit value b ₂ and the lower limit value b ₁ judge. If the distance b is within the allowable range, considered as the height position h of the hanger portion A ₂ is within an acceptable range, in this case, anode A warpage of its length is in the within the acceptable range It is determined to be good. If the distance b is outside the allowable range, the anode A is determined to be defective.

As shown in FIGS. 6A and 6B,
The first and second rangefinders 10 and 11 are hanging portions A ₂ and A _2.
The presence or absence of flash can also be detected. That is, the rotation angle of the turntable 1 when the first and second rangefinders 10 (11) detect the hanging parts A ₂ , A ₂ (the detection value changes rapidly), and the detection is completed. The rotation angle of the turntable 1 at the time (the detection value changes rapidly) is
(See FIGS. 1 and 9). Control unit 30, by the rotation speed of the differential and the turntable 1 of the measured value by the encoder E, and measuring the width d of the hanger portion A ₂ (the dimension in the anode A length direction), which is preset in the standard ( the anode a is judged to be good if in the reference size), it is assumed that burr is present in the hanger portion a ₂ if out of specification, bad judges anode a.

Third and fourth laser distance meters 12, 1
As shown in FIG. 3, the disposition position of the mold 3 is such that the hanging portions A ₂ , A ₂ are not lost, and there are no burrs on the sides of the hanging portions A ₂ , A ₂ , and the mold 2
If the positional deviation is within the allowable range, the hanging portions A ₂ , A ₂ are not detected. That is, the arrangement positions of the four laser distance meters 10, 11, 12, and 13 are such that the mold 2 (see FIG.
_When a non-defective anode A having a normal width a and having no burrs at the side ends of A ₂ and A ₂ passes below the detection device, the first and second anodes A and A ₂ are removed.
Only the laser rangefinders 10 and 11 detect the hanging parts A ₂ and A ₂ , and the third and fourth laser rangefinders 12 and 13 do not detect them. A detection pattern by the four laser distance meters 10 to 13 as shown in FIG.

[Table 1] Here, Table 1 it has detected the hanger portion A ₂ by the laser range finder 10 to 13, is a table showing whether a pattern.
An example of the detection pattern will be described with reference to Table 1.

As shown in the detection patterns shown in FIGS. 7A and 7B, when the position where the mold 2 is placed is shifted despite the fact that the anode A is a good anode, A different detection pattern results. FIG.
As shown in the detection pattern shown in FIG.
_Since there may be burrs B (projecting in a direction perpendicular to the direction of rotation of the turntable 1), the controller 30 causes the alarm 50 (FIG. 4) to issue an alarm in these cases. (See Table 1). The detection patterns shown in FIGS. 7 (c) and 7 (d) are cases where the template 2 is further displaced from the cases of the detection patterns of FIGS. 7 (a) and 7 (b). since one of the most of the hanger portion a ₂ as in the detection pattern is also likely to be missing, in these cases, the control unit 30 is allowed to cause after leaving the alarm to the alarm 50 (see Table 1 ). Detection pattern shown in FIGS. 7 (e), (f) is a pattern when the anode A of one of most hanger portion A ₂ is missing has passed through the detector. Therefore, in this case, the control unit 30
0 (see FIG. 9) is controlled so as to display an indication of failure determination (see Table 1). The detection pattern shown in FIG. 7 (g) is a case where most of the both hanging portions A ₂ and A ₂ are missing.
The detection pattern shown in FIG. 7 (h) is a case where there are burrs B, B on both the hanging portions A ₂ , A ₂ , and in any case, the control unit 30 causes the display unit 40 to display a defect determination (see Table 2). 1).

Here, an example of the protection structure of the laser distance meter will be described with reference to FIG. Laser distance meter 1
0 (11, 12, 13) is covered and protected by a cover 14. Reference numeral 16 denotes a sensor cable, and the laser distance meter 10 is connected to the control unit 30 (see FIG. 9) by the sensor cable 16. The cover 14 includes an inner cover 14a, an intermediate cover 14b, and an outer cover 14c. The inside of the inner cover 14a is a space to which high-pressure air is supplied, the space between the inner cover 14a and the intermediate cover 14b is a space to which cooling water 24 is supplied, and the space between the intermediate cover 14b and the outer cover 14c. A heat insulating material 23 is provided between them.

The inside of the intermediate cover 14b is divided into two parts by a partition plate 22.
Divided into two spaces. Reference numerals 17 and 18 indicate an outer tube and an inner tube (air introduction tube), respectively. The cooling water 24 introduced into the intermediate cover 14b below the partition plate 22 by the cooling water introduction pipe 19
After passing through the intermediate cover 14b above the partition plate 22, the water is drained through the outer pipe 17.

Openings are respectively formed in the lower centers of the inner cover 14a, the intermediate cover 14b and the outer cover 14c, and the openings of the inner cover 14a and the outer cover 14c are covered with glass plates 27 and 28, respectively. A first hood (cylindrical protection member) 26a is provided at the center of the outer surface below the outer cover 14c, and the first hood 26a has a second hood (cylindrical protection member) with a glass plate 29 interposed therebetween. Is connected. The high-pressure air introduced from the inner pipe 18 into the inner cover 14a is introduced into the second hood 26b through the pipe 20, and further discharged from the lower end.

[0031] Thus, by cooling the laser distance meter 10 can be arranged as much as possible as close to the laser range finder 10 to the hanger portion A _2, also, the optical path of the laser range finder 10 by high pressure air By purging the vapor or the like, adverse effects on the laser rangefinder 10 due to disturbance can be reduced, and the measurement accuracy can be further improved. As is apparent from the above description, the cooling means is constituted by the cooling water introduction pipe 19, the pipe 21, the inner cover 14a, the intermediate cover 14b, and the like. The high pressure air supply means is constituted by the inner pipe 18, the pipe 20, and the like.

Next, a method for detecting a defective anode will be described. First, the mold 2 into which a certain amount of molten metal has been injected at the pouring station is moved to the measuring station by rotation of the turntable 1. At this time, the molten metal in the mold 2 is completely cooled and solidified, and the anode A is pushed up. Rod 3
The lifting portions A ₂ , A ₂ are pushed up by the lifting portions A 2
_2, A ₂ is caused to hold exposed at measuring station in place.

First, the first laser range finder 10 and the second laser range finder 11 output a hanging portion A _{2 of} the anode A,
Measured distance to A ₂ b (see FIG. 5), respectively, both measured value b is, if within the range b ₁ ~b ₂ no problem at a preset on operation, and good respect sled It is determined, and if it is out of the range, it is determined to be defective.

[0034] Also, the burr of the upper end of the hanger portion A _2, A _2, and the rotation angle of the turntable 1 when the laser rangefinder 10 and 11 began to detect the hanger portion A _2, A _2, The rotation angle of the turntable 1 when the detection is completed is recognized by the encoder E, and the width d (see FIG. 6) of both the hanging portions A ₂ , A ₂ is measured from the difference, and both d are within the standard. If,
Was judged to be good, and that burrs are present on at least one of the hanger portion A ₂ otherwise determines failure.

Further, first to fourth lasers 10 to 1
3 and 7 (a) to 7 (h) are determined, and a non-defective product and a defective product are determined. Note that all the detection patterns in FIGS. 7A to 7H are determined to be defective. FIG. 7 shows the detection pattern.
In the cases (a) to (d), the alarm device 50 issues an alarm according to a command from the control unit 30. Thus, the operator confirms the anode A, and the alarm is generated due to the presence of burrs in the hanging portions A ₂ , A ₂ of the anode A or the misalignment of the mold 2. Judge what is.

At least one hanging part A as described above
_{In step 2} , if at least one of the warpage determination, the burr determination, and the detection pattern determination determines that the product is defective, the control unit 30 displays the occurrence of a defective product on the display 40, and determines that the product is defective. The anode A thus removed is removed from the mold 2 by the stripping device, discharged out of the manufacturing device, and is not transferred to the electrolytic device in the next step, so that extremely smooth operation can be performed in the electrolytic device. As described above, the defective products can be reliably detected by the laser rangefinders 10 to 13 without visually checking the operator during the casting process of the anode A. The detection method according to the present invention can also determine the displacement of the mold.
After the above determination is made, the quality of the next anode (not shown) is determined, and as a result, the quality of all the anodes on the turntable 1 is determined.

According to the present embodiment, can measure the dimensions of the hanger portion A _2, A ₂ with high accuracy by a minimum of two laser rangefinder 10 and 11 provided above the hanger portion A _2, A ₂ It is not necessary to measure the shape from the side surfaces of the hanging portions A ₂ , A _{2 as in} the related art.
In addition, it is not necessary to perform complicated processing such as conventional image processing on the measurement values obtained by the laser distance meters 10 and 11, and only by comparing the measurement values with the set reference dimensions, the heights of the hook portions A ₂ and A ₂ can be reduced. Pass / fail can be determined instantaneously. Laser distance meter 10,11
Is the object to be measured (hanging part) A ₂ compared to the TV camera.
Even if the distance to the distance is long, the decrease in the measurement accuracy is small and the reliability is excellent.

Further, the apparatus for detecting a defective anode according to the present embodiment can perform the above method at low equipment cost.
Further, by cooling the laser rangefinders 10 to 13, the laser rangefinders 10 to 13 are brought as close as possible to the hanging portions A ₂ and A _2, and steam is generated on the optical path of the laser rangefinders 10 to 13 by high-pressure air. By purging etc.
The adverse effects due to disturbance can be reduced, and the measurement accuracy can be further improved.

[0039]

Since the present invention is configured as described above, it has the following effects. The method for detecting a defective anode according to the present invention uses a laser distance meter disposed above the hanging portion to measure the distance to the hanging portion, thereby allowing the height position of the hanging portion and the laser rangefinder to pass. The dimensions of the hanging portion can be measured with high accuracy, and there is no need to measure from the side surface of the hanging portion as in the related art. Further, it is not necessary to perform complicated processing such as conventional image processing on the measurement value by the laser distance meter, and the quality of the hanging portion can be instantaneously determined only by comparing the measurement value with the set reference value. Compared with a conventional television camera, the laser distance meter has a small decrease in measurement accuracy and is excellent in reliability even when the distance to the object to be measured (hanger) is long.

Further, the apparatus for detecting a defective anode according to the present invention can perform the above method at low equipment cost.
Furthermore, by cooling the laser range finder, the laser range finder is brought as close as possible to the hanging part, and by purging steam and the like on the optical path with high-pressure air, adverse effects due to disturbance can be reduced, further improving measurement accuracy. Can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view for explaining an arrangement of a laser distance meter of a device for detecting a defective anode of the present invention.

FIG. 2 is a side view in which a main part of FIG. 1 is sectioned.

FIG. 3 is a plan view of the anode and the laser range finder of FIG. 1 as viewed from above.

FIG. 4 is a cross-sectional view showing details of a detection device.

FIG. 5 is a side view of the pushed anode.

FIG. 6A is an enlarged plan view of a hanging portion, and FIG.
FIG. 3 is a diagram showing a pattern of a detection signal by a laser distance meter.

FIG. 7 is a diagram showing a positional relationship between an anode and each laser distance meter with respect to a positional shift of a mold and a defect of a hanging portion.

FIG. 8 is a diagram showing the internal structure of a laser distance meter.

FIG. 9 is a block diagram of a control system of the detection device.

FIG. 10 is a schematic perspective view for explaining an arrangement of a laser distance meter of a conventional defective anode detection device.

11 (a) is an enlarged plan view of the hanging portion of FIG. 10,
(B) is an enlarged side view of the hanging part of FIG.

[Explanation of symbols]

Reference Signs List A Shoulder type anode A ₁ Electrode plate A ₂ Hanger (ear) E Encoder K Transmission mechanism H Detector main body 2 Mold 3 Push-up rod 3a Upper end 3b Lower end 11-13 Laser rangefinder 14 Cover 14a Inner cover 14b Intermediate cover 14c Outer cover 16 Sensor cable 17 Inner pipe 18 Outer pipe 19 Cooling water introduction pipe 20 Pipe 21 Pipe 22 Partition plate 23 Insulation material 24 Cooling water 26a First hood (protection member) 26b Second hood (protection member) 27, 28, 29 Glass plate 30 Control unit (data processing device) 31 Semiconductor laser 32 Light projecting lens 33 Light receiving lens 34 Optical position detecting device 35 Drive circuit 36 Signal amplifying circuit 37 Exterior 40 Display 50 Alarm

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Kenji Seiya 4049-1, Naoshima-cho, Kagawa-gun, Kagawa Pref.

Claims (5)

[Claims] 1. A shape detection of a hook portion integrated with an electrode plate portion of a shoulder type anode cast at a predetermined position with respect to a mold placed on a turntable which continuously rotates in a circumferential direction. A method, wherein the cast shoulder-type anode is partially lifted up from the inside of the mold to expose a hanging portion, and a laser distance meter disposed above the exposed hanging portion, By continuously measuring the distance to the hanging part,
The height position of the hanging portion and the dimension of the shoulder type anode in the length direction of the hanging portion are obtained, and these are compared with a preset reference height and reference size, respectively, thereby obtaining the shoulder type anode. A method for detecting a defective anode, characterized by determining pass / fail. 2. A plurality of laser rangefinders are provided in a width direction of the shoulder type anode with respect to one hanging portion, so that a plurality of laser rangefinders can detect the pattern of the hanging portion. The method for detecting a defective anode according to claim 1, wherein misalignment of the mold, casting in a direction orthogonal to a rotation direction of the turntable of the hanging portion, and the like are detected. 3. The shape of a handle portion integrated with an electrode plate portion of a shoulder type anode cast at a predetermined position with respect to a mold placed on a turntable that continuously rotates and moves in a circumferential direction. An apparatus for detecting, comprising: a push-up mechanism for partially extruding the cast shoulder-type anode from within the mold to expose a hanging portion; and a device disposed above the exposed hanging portion. A laser distance meter for continuously measuring the distance to the hanging portion, and a height position of the hanging portion and the shoulder type of the hanging portion based on data measured by the laser distance meter. Control means for determining the dimension of the anode in the length direction of the anode and comparing these with a preset reference height and reference dimension to determine the quality of the shoulder type anode. Detector for defective anodes. 4. A plurality of laser rangefinders are provided in a width direction of the shoulder type anode with respect to one suspension unit, and the control means controls the suspension unit by a plurality of laser rangefinders. 4. The defective anode detecting device according to claim 3, wherein a detection pattern is inputted to detect a displacement of a mold and a casting in a direction orthogonal to a rotation direction of the turntable of the hanging portion. 5. A cooling means for cooling the laser range finder, a protection member surrounding the optical path of the laser range finder between the laser range finder and the hanging portion, and a high pressure inside the protection member. 5. The defective anode detecting device according to claim 3, further comprising a high-pressure air supply means for supplying air.