JP7487762B2 - Molded product inspection device - Google Patents

Description

The present invention relates to a molded product inspection device that handles molded products made from rolled metal sheets.

2. Description of the Related Art Conventionally, in a process for applying paint or the like to the surface or inner surface of a container (molded product), an apparatus for spraying paint while gripping and rotating the container (molded product) is known, for example from Patent Document 1.
The molded product inspection device (material application device 10) of the spray painting system described in Patent Document 1 applies material to the surface of a molded product (workpiece W) and has a workpiece holder that holds the molded product, which is part of the rotating holding section (can rotation drive mechanism 12).

The rotary holding section (can rotation drive mechanism 12) can hold multiple molded products (workpieces W) using star-shaped wheels, and can rotate the molded products (workpieces W) around their central axes using devices such as drive belts and wheels.
The molded product inspection device (material application device 10) is provided with a liquid injection section (material application mechanism 14), and the material application is controlled to be turned on and off by a control unit (control mechanism 18).

Furthermore, the molded product inspection device (material application device 10) is provided with a rolling direction detection section (speed detector or sensor 22) which detects marks, etc. on the molded product (workpiece W) and transmits a signal to the control unit (control mechanism 18).
The control unit (control mechanism 18) determines the rotation speed of the molded product (workpiece W) and controls the on/off of material application based on the signal received from the rolling direction detection section (speed detector or sensor 22), thereby minimizing excess coating and shortening the time the molded product (workpiece W) spends in the spray pocket.

JP 2005-525236 A

However, there is still room for improvement in the molded product inspection device known in the above patent document.

In other words, the molded product inspection device known from Patent Document 1 determines the rotation speed of a molded product by detecting multiple markings on the surface of the molded product, and therefore there was a risk that the rotation speed of a container (molded product) could not be determined from a location without markings, such as a plain molded product that is not printed on, for example.
It is also possible to mark unprinted molded products with stickers or the like, but this would increase the number of work steps required for attaching and removing the stickers, which could result in increased costs.

In addition, the molded product inspection device known from Patent Document 1 starts the material application work after checking the rotation of the molded product with a mark, so it takes time before the material application work itself can start, which could increase the production time per product.

The present invention aims to solve these problems by providing a molded product inspection device that can identify the rolling direction, rotation speed, and rotation angle (number of rotations) of a molded product with a simple configuration, even for molded products that do not have markings, and that can prevent an increase in the number of processes and production time, as well as an increase in costs.

The molded product rotation confirmation device of the present invention is a molded product confirmation device having a molded product rotation unit provided with a rotary holding unit that rotatably holds a metal molded product molded from a rolled metal plate and a rolling direction detection unit that detects the rolling direction of the metal molded product held in the rotary holding unit, and a control unit that controls the operation of the molded product rotation unit, wherein the rolling direction detection unit has a light emitting unit that irradiates an irradiation target surface having a metallic luster, which is the surface of the metal molded product held in the rotary holding unit, with irradiation light, and a light receiving unit that receives reflected light reflected from the irradiation target surface out of the irradiation light from the light emitting unit, The light emitting unit irradiates light onto the target surface at a predetermined angle of incidence from a vertical direction, and the control unit is configured to detect the rolling direction of the metal molded product held in the rotating holding unit based on information of continuous changes in the intensity of the reflected light received by the light receiving unit received from the rolling direction detection unit, and the control unit is configured to calculate the rotational speed from the time of change in the rolling direction of the metal molded product held in the rotating holding unit based on information of continuous changes in the intensity of the reflected light received by the light receiving unit received from the rolling direction detection unit , thereby solving the above problem.

The molded product inspection device of claim 1 uses a rolling direction detection unit to confirm reflected light from the irradiated surface of a metal molded product formed from a rolled metal plate, and controls the molded product rotation unit with a control unit.Therefore, by irradiating light from the light emitting unit onto fine irregularities (rolling marks) that are generated during rolling and remain on the surface of the metal molded product and extend in the rolling direction, and receiving the reflected light, the rolling direction detection unit can detect continuous changes in the intensity of reflected light from the rolling marks, whose direction changes as the metal molded product rotates.
This allows the control unit to detect the rolling direction of a metal molded product, even if it is not marked, based on the continuous changes in the intensity of the reflected light confirmed by the rolling direction detection section.
In addition, the control unit can capture the rotation of the metal molded product by obtaining information on continuous changes in the intensity of reflected light that accompanies the rotation of the metal molded product from the rolling direction detection unit, and can also control the operation of the molded product rotation unit based on information on the rolling direction, rotation speed, and rotation angle (number of rotations) of the metal molded product.
In addition, the control unit is configured to be able to calculate the rotation speed from the time of change in the rolling direction of the metal molded product held in the rotating holding unit, based on the information of continuous changes in the intensity of the reflected light received by the light receiving unit received from the rolling direction detection unit.This allows the control unit to capture changes in the rotation speed of the metal molded product in even more detail, and the control unit can more accurately grasp situations, such as when slippage occurs during rotation of the metal molded product, and appropriately control the operation of the molded product rotation unit according to the situation of the rotating holding unit.

According to the configuration described in claim 2, the light emitting unit irradiates the irradiation surface (rolling mark) with light at an incident angle of 5 degrees or more and 15 degrees or less from the vertical direction, so that the continuous change in the intensity of the reflected light from the irradiation surface (rolling mark) can be captured more accurately, and the rolling direction detection unit can more reliably detect the rolling direction of a metal molded product that does not have a mark.
According to the configuration described in claim 3, the rolling direction detection unit is positioned at a distance of 100 mm or more and 200 mm or less from the irradiated surface (rolling mark). Therefore, the reflected light from the irradiated surface (rolling mark) can be reliably received by the light receiving unit without being significantly attenuated, and the rolling direction detection unit can detect the rolling direction of the metal molded product more reliably.

According to the configuration described in claim 4 , the molded product discharge section has a normal discharge path and an error discharge path, and the control unit instructs the molded product discharge section to discharge the metal molded product discharged from the rotating unit from either the normal discharge path or the error discharge path based on the calculated rotational speed of the metal molded product held in the rotating holding section.Therefore, for example, the control unit can determine from information on the rotational speed of the metal molded product whether it is a normal product in which the work performed on the metal molded product was completed normally, or an error product in which the work could not be completed normally, and can reliably discharge the metal molded product into the normal discharge path and the error discharge path.

According to the configuration described in claim 5 , the molded product rotation unit has a liquid injection section that injects liquid toward the metal molded product while the metal molded product held in the rotating holding section is rotating, so that the control unit can determine whether or not sufficient liquid has been injected onto the surface of the metal molded product from information on the rotation speed of the metal molded product.
This allows the control unit to easily determine whether or not work within the molded product rotation unit has been completed successfully from information on the rotation speed of the metal molded product. Therefore, even if, for example, the time for which liquid is sprayed by the liquid spray section within the molded product rotation unit or the time for which the metal molded product is rotated is fixed to a constant value, the rotation angle (application range) for applying liquid to the metal molded product can be kept constant, allowing for stable supply and production of molded products.
According to the configuration described in claim 6 , the control unit is configured to be able to control the start and end of liquid spray from the liquid spray section based on the calculated rotational speed of the metal molded product held in the rotating holding section, so that the control unit can always adjust the spray time of liquid from the liquid spray section in accordance with changes in the rotational speed of the metal molded product, and can reliably apply the required amount of liquid to the metal molded product.

According to the configuration of claim 7 , since the rolling direction detection unit is composed of a reflective laser sensor, the device can be constructed using inexpensive and easily procured products, and an increase in the cost of the device can be suppressed.
According to the configuration described in claim 8 , the reflected light from the irradiated surface of the metal molded product formed from the rolled metal plate held by the rotating and holding means is confirmed by the rolling direction detection means. In order to confirm this, the irradiated light is directed at the fine irregularities (rolling marks) remaining on the surface of the metal molded product that are generated during rolling and extend in the rolling direction, and the reflected light is received, thereby making it possible to confirm the continuous change in the intensity of the reflected light from the rolling marks, whose direction changes as the metal molded product rotates.
As a result, even if the metal formed product is not marked, the rolling direction of the metal formed product can be detected based on the continuous change in the intensity of the reflected light confirmed by the rolling direction detection means.
In addition, the rolling direction detection means can obtain information on continuous changes in the intensity of reflected light that accompanies the rotation of the metal molded product, thereby enabling the rotation of the metal molded product to be captured. Therefore, based on information on the rolling direction, rotation speed, and rotation angle (number of rotations) of the metal molded product, it is possible to control, for example, the handling of the metal molded product, such as holding and rotation, by the rotating and holding means.
In addition, the rolling direction detection means irradiates the irradiation target surface, which has a metallic luster and is the surface of the metal molded product held by the rotating and holding means, with irradiation light from a vertical direction at a predetermined angle of incidence, and based on the information on the continuous changes in the intensity of the reflected light from the irradiation target surface, it can calculate the rotation speed from the time of change in the rolling direction of the metal molded product held by the rotating and holding means.This allows the rolling direction detection means to capture changes in the rotation speed of the metal molded product in more detail, and the rolling direction detection means can more accurately grasp situations, such as when slippage occurs during rotation of the metal molded product, and can appropriately control the operation of the molded product rotation unit according to the status of the rotating and holding means.

1 is a schematic front view of a molded product inspection device 100 according to an embodiment of the present invention. 2 is a schematic cross-sectional side view of a coating area S of the molded product inspection device 100 according to one embodiment of the present invention. FIG. 1 is a schematic diagram showing a state 1 in which irradiation light B1 is irradiated from a rolling direction detection unit 125 onto a rotating molded product C in a molded product inspection device 100 according to an embodiment of the present invention. FIG. Schematic diagram showing the appearance of irradiated light B1 irradiated from the rolling direction detection unit 125 to the irradiation target surface Cs and reflected light B2 reflected from the irradiation target surface Cs in state 1 of the molded product inspection device 100 according to one embodiment of the present invention. 1 is a schematic diagram showing a state 2 in which the rotating molded product C is irradiated with irradiation light B1 from a rolling direction detection unit 125 in the molded product rotation confirmation device 100 according to one embodiment of the present invention. FIG. Schematic diagram showing the state of irradiated light B1 irradiated from the rolling direction detection unit 125 to the irradiation target surface Cs and the reflected light B2 reflected from the irradiation target surface Cs in state 2 of the molded product inspection device 100 according to one embodiment of the present invention. 1 is a schematic diagram showing the positional relationship between a rolling direction detection unit 125 and an irradiation target surface Cs of a molded product inspection device 100 according to an embodiment of the present invention. FIG. 4 is a flowchart showing a flow of a series of operations for detecting rotation of a molded product C by the molded product inspection device 100 according to one embodiment of the present invention.

Hereinafter, a molded product inspection device 100 according to an embodiment of the present invention will be described with reference to the drawings.
For the sake of explanation, the molded product receiving section, the control unit, and the molded product discharging section are not shown in the drawings.

As shown in Figures 1 and 2, the molded product inspection device 100 according to one embodiment of the present invention handles molded products C, which are metal molded products formed from rolled metal sheets, and has a molded product receiving section (not shown) that receives molded products C from an upstream process to the rotating and holding section 122 of the molded product rotation unit 120 on the turret 110, a molded product discharge section (not shown) that discharges molded products C from the rotating and holding section 122 of the molded product rotation unit 120 to a downstream process, and a control unit (not shown) that controls the operation of the molded product rotation unit 120 including the molded product receiving section (not shown) and the molded product discharge section (not shown).

The molded product rotation unit 120 has a rotation holding section 122 that rotatably holds the molded product C in a pocket 123 in a molded product receiving section (not shown) and transports it to a molded product discharge section (not shown) via a coating area S, a rotation transmission belt 121 that transmits rotational force to the molded product C in the coating area S, a rolling direction detection section 125 that detects the rolling direction required to capture the rotation of the molded product C in the coating area S, and a liquid injection section 130 that sprays coating liquid (paint) at any position on the molded product C rotating in the coating area S.
In this embodiment, the liquid jetting unit 130 will be described as jetting the coating liquid onto the bottom portion Cb of the molded product C.

The rotary holder 122 is provided with a pocket 123 for receiving and holding the molded product C, and rollers 124 for rotatably supporting the body portion Cm of the molded product C received in the pocket 123.
The rolling direction detection unit 125 has an emitter 126 that emits irradiation light B1 onto an irradiation target surface Cs, which is any location on the bottom Cb of the molded product C, and a light receiver 127 that receives reflected light B2 of the irradiation light B1 reflected by the irradiation target surface Cs, and is configured to be able to transmit information on continuous changes in the intensity of the reflected light B2 to a control unit (not shown).
At least the bottom portion Cb of the molded product C has the metallic gloss surface of the rolled metal plate exposed.
Alternatively, the surface of the rolled metal plate or molded product C may be covered with a transparent paint, ink, transparent resin, or the like, as long as it does not block the light B1 irradiated onto the glossy metal surface or the light B2 reflected from the glossy metal surface.
The material of the molded product C is not limited as long as it is a rolled metal plate having a metallic luster. For example, an aluminum plate or a steel plate can be used.

Next, the process of applying a coating liquid to the bottom Cb of a molded product C using a molded product inspection device 100 according to one embodiment of the present invention will be described with reference to Figures 1 to 8.

First, the molded product inspection device 100 is started, and as shown in FIG. 1, the molded product C transported from an upstream process is supplied to the molded product receiving section (not shown) of the molded product rotation unit 120 (step 1), and is then received by the rotating holding section 122 provided on the turret 110 (step 2).
The molded product C is guided into a pocket 123 of the rotary holder 122, and the body portion Cm is supported by rollers 124 so as to be rotatable about the central axis of the molded product C as the center of rotation.

The molded product C held by the rotary holder 122 is transported to the coating area S by the rotation of the turret 110 as shown in FIG. 2 (step 2).
At this time, the molded product C is positioned so as to be sandwiched between the rotation transmission belt 121 and the roller 124, and starts to rotate as the rotation force is transmitted by the rotation transmission belt 121 (step 3).

In addition, after the expected time has elapsed from the start of rotation of the molded product C until the rotation stabilizes, the liquid injection unit 130 begins to inject the coating liquid onto the bottom Cb of the molded product C for a predetermined period of time, and the light emitting unit 126 of the rolling direction detection unit 125 begins to irradiate the irradiation target surface Cs with irradiation light B1 at a predetermined angle, thereby starting to check the rotation of the molded product (step 4).
The irradiation target surface Cs is the location at which the irradiation light B1 emitted from the light emitting unit 126 reaches the bottom Cb of the molded product C, regardless of the rotation of the bottom Cb of the molded product C.

The irradiation light B1 that reaches the irradiation target surface Cs is reflected and becomes reflected light B2. However, since the reflected light B2 is diffused depending on the state of the irradiation target surface Cs, the light receiving section 127 receives only a portion of the reflected light B2.
In other words, when irradiation light B1 is irradiated at a predetermined angle onto a rotating molded product C, the state of the irradiation target surface Cs changes as the molded product C rotates, and the intensity of the reflected light B2 that can be received by the light receiving unit 127 also changes.

Next, the state of the irradiation target surface Cs when the molded product C is rotating, and the irradiated light B1 and reflected light B2 will be explained using Figures 3 to 7.

Here, state 1 and state 2 indicate predetermined states during rotation of molded product C, and if the rotation angle of molded product C in state 1 is 0 degrees, the rotation angle of molded product C in state 2 is 90 degrees.
In addition, since the formed product C is formed from a rolled metal plate, the bottom Cb has countless rolling marks Ct, which are fine irregularities (rolling mark peaks Ct1 and rolling mark valleys Ct2) extending in the rolling direction.

As shown in Figure 3, in state 1, the rolling marks Ct extend in the vertical direction, and in state 2, the molded product C is rotated 90 degrees from state 1, so that the rolling marks Ct extend in the horizontal direction, as shown in Figure 5.
In state 1, as shown in FIG. 4, the irradiation light B1 reaches the rolling grain Ct of the irradiation target surface Cs.
Since the rolling marks Ct extend in the vertical direction, the irradiated light B1 is irradiated from the peaks Ct1 to the valleys Ct2 of the rolling marks Ct, and the reflected light B2 is reflected from the irradiation target surface Cs so as to be diffused at various angles from the rolling marks Ct.
At this time, since the rolling marks Ct extend in the vertical direction, when the irradiation light B1 is irradiated in the same direction as the extension direction of the rolling marks Ct at a predetermined incident angle B1d as shown in FIG. 4, the component of the reflected light B2 that is at the angle of regular reflection increases, and the component of the reflected light B2 that can be received by the light receiving unit 127 that is diffuse reflection is small, and the intensity of the reflected light B2 received by the light receiving unit 127 becomes small.

When the molded product C is rotated 90 degrees to transition from state 1 to state 2, as shown in FIG. 5, the irradiated light B1 reaches the rolling marks Ct extending laterally on the irradiation target surface Cs.
Since the rolling eye Ct extends in the horizontal direction, the irradiated light B1 irradiated from the peak Ct1 to the valley Ct2 of the rolling eye Ct is reflected largely from the connection surface Ct3 between the peak Ct1 and the valley Ct2 of the rolling eye Ct, as shown in Figure 6. As a result, there is a greater amount of diffuse reflection component compared to state 1, and a greater amount of reflected light B2 can be received by the light receiving unit 127, and the intensity of the reflected light B2 received by the light receiving unit 127 becomes greater.

When the molded product C is rotated another 90 degrees (180 degrees) from state 2, the rolling marks Ct again extend vertically, as in state 1, and the amount of reflected light B2 that can be received by the light receiving unit 127 again decreases, and when the molded product C is rotated another 90 degrees (270 degrees), the rolling marks Ct again extend horizontally, as in state 2, and the amount of reflected light B2 that can be received by the light receiving unit 127 again increases.
In other words, it can be seen that the continuous change in intensity of the reflected light B2 received by the light receiving section 127 periodically occurs twice during one rotation of the molded product C, with a small peak at an angle of 0 degrees (180 degrees) and a large peak at an angle of 90 degrees (270 degrees).

As a result, without marking a plain molded product with printing or a sticker, the rolling direction of the molded product C can be detected by the rolling direction detection unit 125 from the continuous change in intensity of the reflected light B2 received by the light receiving unit 127 when light is irradiated onto the rolling mark Ct of the bottom Cb of the molded product C. Furthermore, the control unit (not shown) can identify the rotation angle and rotation speed of the molded product C based on the number of peaks in the continuous change in intensity of the reflected light B2 and the time of change in the rolling direction (the time between two peaks).
In addition, since the rolling direction detection unit 125 only needs to be configured to irradiate the irradiation light B1 from the light emitting unit 126 to the irradiation target surface Cs and to receive the reflected light B2 from the light receiving unit 127, there is no need to use an expensive high-precision camera or the like, and an inexpensive commercially available product such as a laser sensor can be used, which makes it possible to suppress cost increases and improve maintainability.

As shown in Figure 7, the angles of the optical axes B1c, B2c of the irradiated light B1 and the reflected light B2 with the irradiated surface Cs are such that at least one of the incident angle B1d of the optical axis B1c of the irradiated light B1 and the reflection angle B2d of the optical axis B2c of the reflected light B2 is other than 0 degrees, since if both are 0 degrees, there will be no change in the intensity of the reflected light B2 depending on the rolling direction of the molded product C.
It is preferable that the incident angle B1d of the optical axis B1c of the irradiation light B1 is between 5 degrees and 15 degrees, in order that the light receiving unit 127 can receive the reflected light B2 to an extent that the change in intensity of the reflected light B2 can be sufficiently confirmed.
In addition, it is preferable that the distance T between the rolling direction detection unit 125 and the irradiation target surface Cs be 100 mm or more and 200 mm or less, because this allows the light receiving unit 127 to receive reflected light B2 to a degree that allows the change in intensity of the reflected light B2 to be sufficiently confirmed.

The liquid injection unit 130 stops injecting the liquid after a predetermined time has elapsed since the start of liquid injection (step 5), and the control unit (not shown) determines whether or not the injection of liquid by the liquid injection unit 130 has been completed normally based on the information of the continuous change in the intensity of the reflected light B2 transmitted from the rolling direction detection unit 125 (step 6).
Specifically, it is possible to make a judgment by determining whether the rotation speed of the molded product C is within the range of normal rotation speeds based on information on the change in intensity of the reflected light B2, but the judgment criterion is not limited to the rotation speed of the molded product C; for example, the judgment criterion may be whether the molded product C has rotated a predetermined angle.

If the liquid injection by the liquid injection section 130 is completed normally, the control unit (not shown) determines that the molded product C is a normal product (step 6), rotates the turret 110 to move the rotating holding section 122 to the molded product discharge section (not shown), and transports the molded product C from the regular discharge path (not shown) to the next process downstream (step 7), and the molded product receiving section (not shown) accepts the newly transported molded product C from upstream into the rotating holding section 122 (step 2).
If the liquid injection by the liquid injection section 130 is not completed normally, the control unit (not shown) determines that the molded product C is an error product (step 6), rotates the turret 110 to move the rotating holding section 122 to the molded product discharge section (not shown), stops the acceptance of newly transported molded products C from upstream at the molded product receiving section (not shown) (step 8), discharges the molded product C from the error discharge path (not shown) outside the molded product inspection device 100 (step 9), and stops the molded product inspection device 100 (step 10).

This makes it possible to reliably prevent molded products C that have been determined to be erroneous products from being transported to downstream processes, and allows the molded product inspection device 100 to be quickly restored.

Here, an example of a method for discriminating between normal and erroneous products by a control unit (not shown) for the molded product inspection device 100 according to one embodiment of the present invention will be specifically explained using Table 1 showing the change in intensity of reflected light B2 received by the light receiving unit 127 of the rolling direction detection unit 125.
In Table 1, the horizontal axis represents the elapsed time, and the vertical axis represents the intensity of the reflected light B2 received by the light receiving unit 127.

As shown in Table 1, within 120 msec, there are three peaks (P1, P2, P3) where the intensity of reflected light B2 increases (corresponding to state 2), and there are two peaks (L1, L2) where the intensity of reflected light B2 decreases (corresponding to state 1).
That is, it can be seen that this molded product C makes half a rotation from P1 to P2, and makes one rotation from P1 to P3.

Furthermore, if the rotation of the molded product C is stable, the rotation speed of the molded product C can be easily determined from the time required for half a rotation from P1 to P2.
Since P1 is reached at 12 msec and P2 is reached at 54 msec, it is understood that the time for molded product C to make half a rotation is 42 msec and that it completes one rotation in 84 msec.
If the rotation of the molded product C is unstable, the variation in the time between peaks in the intensity of the reflected light B2 will increase, making it easy for a control unit (not shown) to detect the occurrence of an abnormality.

As a method for uniformly spraying the coating liquid over the entire bottom Cb of the molded product C, when considering the case of spraying for 90 msec (385.7 degrees) at a rotation speed of 714 rpm (84 msec per rotation), it is possible, for example, to check the rotation speed of the molded product C (84 msec per rotation) and then activate the liquid spraying unit to spray the liquid for a predetermined time (90 msec).
However, since liquid cannot be sprayed until the rotational speed of the molded product C is confirmed, that is, until the intensity of the reflected light B2 reaches peaks P1 and P2 (the time until P1 is reached plus an additional half rotation of 42 msec), there is a risk that the production speed will slow down.
It is also possible to improve the production speed by starting liquid injection when a control unit (not shown) detects that P1 has been reached and stopping liquid injection when P3 has been reached. However, the production speed would be slower because liquid injection cannot start until P1 has been reached, and the time it takes to reach P1 varies depending on the direction of the rolling grain Ct of the molded product C (up to a maximum of 42 msec per half rotation), which could result in an unstable production speed.

Therefore, by assuming the time from when the rotation of the molded product C starts until the rotation stabilizes, and starting to acquire the change in the intensity of the reflected light B2 from the irradiated surface Cs almost simultaneously with the injection of the liquid after that time has elapsed, the control unit (not shown) can determine the time it takes for the molded product C to make half a rotation from the arrival times of P1 and P2 by the time when the injection of the liquid ends (90 msec), and it is possible to confirm the rotation speed during the injection of the liquid, thereby enabling a stable improvement in the production speed.

Although one embodiment of the present invention has been described above in detail, the present invention is not limited to the above embodiment, and various design changes can be made without departing from the invention described in the claims.

In the above-described embodiment, the molded product is held in the rotating holding section and is configured to be movable by a turret to the molded product receiving section, the coating area, and the molded product discharge section. However, the method of moving the molded product is not limited to this. For example, the molded product receiving section, the coating area, and the molded product discharge section may be arranged from upstream to downstream on the conveyor, and the molded product transported on the conveyor may be held in the rotating holding section arranged in the coating area.
In addition, in the above-described embodiment, the molded product is described as having the rotational force transmitted thereto by a rotation transmission belt, but the method of transmitting rotation to the molded product is not limited to this, and the rotation may be transmitted by, for example, a roller.

In addition, in the above-described embodiment, the control unit has been described as discharging the erroneous molded product from the error discharge section when an error product occurs, stopping the supply of molded products to the molded product receiving section, and stopping the molded product confirmation device. However, the operation of the control unit is not limited to this, and for example, it is not necessary to stop the supply of molded products to the molded product receiving section or the rolling direction detection section, and the molded product confirmation device may be stopped only when error products occur consecutively.
In addition, in the above-described embodiment, the coating liquid is sprayed from the liquid spraying section onto the bottom of the molded product, but the type of material and the spraying location are not limited to this, and for example, cleaning liquid, lubricant, cooling water, pressurized air, etc. may be sprayed onto the body or inside of the molded product.

In addition, in the above-described embodiment, the molded product has been described as having a bottomed cylindrical shape, but the shape of the molded product is not limited to this and may be, for example, a blank plate punched out of a rolled metal plate, a can lid, etc.
In addition, in the above-described embodiment, the rolling direction detection unit has been described as irradiating the irradiated light onto the bottom of the molded product, but the irradiated surface of the irradiated light is not limited to this, and can be applied to any surface having a metallic luster, such as a flange portion, a body portion, or a plate portion.

In addition, in the above-described embodiment, the rotation confirmation device has been described as including a configuration for spraying liquid while rotating the molded product, but the configuration of the rotation confirmation device is not limited to this, and for example, the configuration of the rotation confirmation device may include an alignment device that aligns the rolling directions of multiple molded products.
In addition, when an alignment device that aligns the rolling directions of multiple molded products is included in the configuration of the rotation confirmation device, the rolling direction is identified by detecting a peak in Table 1, but it is also possible to set a certain threshold value (for example, 4500 in Table 1) and identify the approximate rolling direction when the intensity value of the reflected light exceeds this threshold value.
It is also possible to mount a rotation angle sensor on the rotation holding section to detect the rotation angle of the molded product, and to control the rotation angle and rolling direction of the molded product from the rolling direction identified from the relationship between the continuous changes in the intensity of the reflected light and the output of the rotation angle sensor.

DESCRIPTION OF SYMBOLS 100: Molded product inspection device 110: Turret 120: Molded product rotation unit 121: Rotation transmission belt 122: Rotation holding section 123: Pocket 124: Roller 125: Rolling direction detection section 126: Light emitting section 127: Light receiving section 130: Liquid injection section C: Molded product Cm: Body section Cb: Bottom section Cs: Irradiation target surface Ct: Rolling mark Ct1: Rolling mark crest Ct2: Rolling mark valley Ct3: Connection surface between crest and valley of rolling mark S: Coating area B1: Irradiated light B2: Reflected light B1c: Optical axis of irradiated light B2c: Optical axis of reflected light B1d: Incident angle of irradiated light B2d: Reflection angle of reflected light T: Distance from the rolling direction detector to the surface to be irradiated

Claims (8)

A molded product inspection device having a molded product rotation unit provided with a rotary holding unit that rotatably holds a metal molded product molded from a rolled metal plate and a rolling direction detection unit that detects the rolling direction of the metal molded product held by the rotary holding unit, and a control unit that controls the operation of the molded product rotation unit,
The rolling direction detection unit includes a light emitting unit that irradiates light onto an irradiation target surface having a metallic luster, which is the surface of the metal molded product held by the rotating holding unit, and a light receiving unit that receives light reflected from the irradiation target surface out of the irradiation light from the light emitting unit,
The light emitting unit irradiates an irradiation target surface with irradiation light at a predetermined angle of incidence from a vertical direction,
The control unit is configured to be able to detect the rolling direction of the metal molded product held by the rotating holder based on continuous change information of the intensity of the reflected light received by the light receiving unit received from the rolling direction detection unit ,
The control unit is configured to calculate the rotational speed from the time of change in the rolling direction of the metal molded product held in the rotating holding unit based on information on continuous changes in the intensity of the reflected light received by the light receiving unit received from the rolling direction detection unit. The molded product inspection device according to claim 1, characterized in that the light emitting unit irradiates the target surface with light at an incident angle of 5 degrees or more and 15 degrees or less from the vertical direction. The molded product inspection device according to claim 1, characterized in that the rolling direction detection unit is disposed at a distance of 100 mm or more and 200 mm or less from the irradiation target surface. The molded product rotation unit further includes a molded product discharge section that discharges the metal molded product held by the rotation holding section,
the molded product discharge section has a normal discharge path for discharging the metal molded product discharged from the rotation unit as a normal product and an error discharge path for discharging the metal molded product as an error product,
The molded product inspection device according to claim 1, characterized in that the control unit instructs the molded product discharge section to discharge the metal molded product discharged from the rotation unit from either a normal discharge path or an error discharge path based on the calculated rotational speed of the molded product held in the rotation holding section. The molded product inspection device according to claim 1, characterized in that the molded product rotation unit has a liquid injection unit that injects liquid toward the metal molded product while the metal molded product held by the rotation holding unit is rotating. The molded product inspection device described in claim 5, characterized in that the control unit is configured to calculate the rotational speed from the time of change in the rolling direction of the metal molded product held in the rotating holding unit based on the continuous change information of the intensity of the reflected light received by the light receiving unit received from the rolling direction detection unit, and to control the start and end of liquid injection from the liquid injection unit based on the calculated rotational speed of the metal molded product held in the rotating holding unit. The molded product inspection device according to claim 1, characterized in that the rolling direction detection unit is composed of a reflective laser sensor. A method for checking a formed product, comprising: a rotating and holding means for holding a metal formed product formed from a rolled metal plate; and a rolling direction detection means for detecting a rolling direction of the metal formed product held by the rotating and holding means,
The rolling direction detection means irradiates an irradiation target surface having a metallic luster, which is the surface of the metal molded product held by the rotating and holding means, with irradiation light from a vertical direction at a predetermined incident angle, and detects the rolling direction based on information on continuous changes in the intensity of the reflected light reflected from the irradiation target surface ;
The rolling direction detection means applies light to an irradiation target surface having a metallic luster, which is the surface of the metal molded product held by the rotating and holding means, from a vertical direction at a predetermined angle of incidence, and calculates the rotational speed from the time of change in the rolling direction of the metal molded product held by the rotating and holding means based on information on continuous changes in the intensity of the reflected light from the irradiation target surface .

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