JP5802232B2 - Container body diameter defect inspection device - Google Patents

Description

  The present invention relates to a cylinder diameter defect inspection apparatus used for inspecting a cylinder diameter defect of a container such as a glass bottle, and in particular, the present invention forms a round of a portion whose strength is reinforced at a predetermined height position of the barrel part. The present invention relates to an apparatus for inspecting a barrel diameter defect of a container that is an inspection target.

  Conventionally, as a cylinder diameter defect inspection device that inspects a cylinder diameter defect such as a glass bottle, the container to be inspected supported on the inspection table is rotated around the central axis of the container by rotating the inspection table. In addition, a configuration has been proposed in which a roller contact of a body diameter detection sensor is brought into contact with the outer peripheral surface of the body of the container, and the body diameter of the contact portion is inspected over the entire circumference (for example, a patent) Reference 1). This inferior body diameter inspection device inspects whether there is a dent or an elliptical deformation in the body of the glass bottle, and the difference between the maximum value and the minimum value of the body diameter detected by the body diameter detection sensor. Is obtained by calculation, and when the difference exceeds a set value, it is determined that the body has a dent or an elliptical deformation.

JP-A-8-114441

  In recent years, glass bottles have been reduced in weight, and in particular, such glass bottles have strength reinforcement in preparation for contact between the same glass bottles at least one or both of the upper end and the lower end of the barrel. A thick-walled portion made (hereinafter referred to as “reinforcing portion”) is formed around. In general, this reinforced portion slightly protrudes from a portion that is not reinforced (hereinafter referred to as “non-reinforced portion”), and when the same glass bottle is adjacent, the protruding reinforced portions come into contact with each other. The reinforcement part is called a “contact point”. Since the glass bottles having contact points are in contact with each other at the contact points, there is no possibility that the glass bottles are damaged even if the glass bottles are in contact with each other.

  Especially in lightweight glass bottles, the parts other than the contact points are thin and not reinforced, so if the glass bottles come into contact with each other in such non-reinforced parts, the glass bottles may be damaged. There is. Also, in the case of a glass bottle that protrudes other than the contact point, when the glass bottle is gripped with a robot arm and the cap is attached, the axis of the glass bottle and the cap may be misaligned, which may interfere with the cap installation. There is also. Furthermore, when a label or a film (hereinafter referred to as “label or the like”) is applied to a portion other than the reinforcing portion, there is a risk that defective attachment of the label or the like may be caused by the protrusion. Therefore, glass bottles that may come into contact with other glass bottles at non-reinforced parts other than the contact points need to be removed as defective barrel diameters. In addition, a trunk diameter defect inspection apparatus that can inspect such a kind of trunk diameter defect has not been proposed.

  This invention has been made by paying attention to the above-mentioned problem, and a vessel diameter that can detect a vessel having a possibility of coming into contact with another vessel at a portion other than a reinforcing portion called a contact point as a defective barrel diameter. An object is to provide a defect inspection apparatus.

According to the container diameter defect inspection device according to the present invention, the reinforcing portion is formed from a non-reinforcing portion where the strength is not reinforced with respect to the container in which the reinforcing portion whose strength is reinforced is formed around the body portion at a predetermined height position. A rotary drive mechanism for performing a defect inspection of whether or not the body is protruding , supporting a container to be inspected and rotating at least once around a central axis of the container; and a body part of the container A first body diameter detecting sensor for contacting a roller contact at the position of the reinforced portion and detecting the body diameter of the contact portion over the entire circumference; and the non-reinforced portion of the body portion of the container, A second body diameter detection sensor for contacting the roller contact at the same angular position as the roller contact of the first body diameter detection sensor and detecting the body diameter of the contact portion over the entire circumference; and the first body diameter Detection output by the detection sensor and the second body Also includes a comparison circuit section that detects whether the trunk diameter of the reinforcing portion is larger than the body diameter of the non-reinforced portion and the detection output of the detection sensor at any angular position of the outer peripheral surface of the container by comparing the entire periphery The comparison circuit unit outputs a signal indicating that the trunk diameter is defective when the detection output by the second trunk diameter detection sensor is larger than the detection output by the first trunk diameter detection sensor at any angular position. Output.

In order to inspect the container diameter defect by the apparatus for inspecting a cylinder diameter having the above-described configuration, the container to be inspected is introduced and supported at the inspection position, and the first cylinder is positioned at the reinforcing portion on the outer peripheral surface of the body part. A roller contact of a diameter detection sensor is brought into contact, and the second body diameter detection sensor is at the same angular position as the roller contact of the first body diameter detection sensor, which is the non-reinforcing portion of the outer peripheral surface of the body portion. The roller contact is brought into contact. Next, when the container to be inspected is rotated at least once around the central axis of the container by the rotational drive mechanism, the portion other than the reinforcing portion has a body diameter larger than that of the reinforcing portion at any angular position on the outer peripheral surface of the container. If it is larger, the detection output by the second body diameter detection sensor becomes larger than the detection output by the first body diameter detection sensor, and the comparison circuit section outputs a signal indicating that the body diameter is defective.

In a preferred embodiment of the present invention, each of the first and second body diameter detection sensors includes a reciprocating free arm having the roller contact at the tip, and the roller contact for the container to be inspected. A spring that biases the outer peripheral surface and a displacement sensor that converts the displacement of the arm following the movement of the roller contact into an electrical signal corresponding to the body diameter of the container and outputs the electrical signal.
In the body diameter detection sensor of this embodiment, since the roller contact is pressed by the spring and is in contact with the outer peripheral surface of the container, the roller contact moves with the change in the body diameter, and the arm follows the movement. The displacement is converted into an electrical signal corresponding to the body diameter of the container and output.

  According to this invention, since it is possible to detect a container having a risk of contact with another container at a part other than the reinforcing part called a contact point as a defective trunk diameter, it is possible to remove such a defective trunk diameter container, Even if the weight-reduced glass bottle is easy to break, breakage due to contact between the glass bottles can be prevented. In addition, since a container with a bad diameter from which a part other than the reinforcing part protrudes can be removed, when a cap such as a glass bottle is gripped with a robot arm and a cap is attached, the container and the cap are There is no possibility that the center of the shaft will be misaligned, and there will be no risk of hindering the cap. Furthermore, there is no possibility of inadvertent sticking of a label or the like to attach a label to a portion other than the reinforcing portion.

It is a front view which shows the condition which is test | inspecting the general | schematic structure of the cylinder diameter defect inspection apparatus which is one Example of this invention, and the cylinder diameter defect of a glass bottle. It is a top view which shows the condition which is test | inspecting the cylinder diameter defect of a glass bottle. It is explanatory drawing which shows the structure of the trunk diameter detection sensor which concerns on another Example. It is a block diagram of a trunk diameter defect inspection device which is one embodiment of the present invention. 6 is a time chart showing a comparison operation of the comparison circuit unit of FIG. 4. It is a flowchart which shows the flow of control of the trunk diameter defect inspection by a control apparatus.

  1 and 2 show a schematic configuration of a trunk diameter defect inspection apparatus according to an embodiment of the present invention. The figure shows a situation in which the bottle diameter 1 is inspected for a defective bottle diameter, but the inspection object is not necessarily limited to a glass bottle, and may be a container other than a bottle, or a plastic bottle. A synthetic resin container may be used.

  A glass bottle 1 to be inspected in this embodiment is a thick-walled reinforcing portion 11 in which strength reinforcement is made in preparation for contact between the same glass bottles at the upper end portion and the lower end portion of a substantially cylindrical body portion 10. 12 is formed around each. These reinforcing portions 11 and 12 are generally called “contact points”. In contrast, the reinforcement between the upper and lower reinforcing portions 11 and 12 is not reinforced, and the non-reinforcing portion 13 is generally called a “recess surface”, and a label or the like is attached thereto. Since each reinforcement part 11 and 12 protrudes slightly from the non-reinforcement part 13, when the same glass bottles 1 and 1 adjoin, the reinforcement part which protrudes will contact.

  The glass bottle 1 molded in the bottle making process is led to an inspection process after cooling and subjected to various inspections. In FIG. 2, 9 is a star wheel installed on the inspection line, and an inspection station for performing an individual inspection is set at each position where the concave portion 90 on the outer periphery of the star wheel 9 stops. The glass bottle 1 to be inspected is introduced into each concave portion 90 of the star wheel 9, and the glass bottle 1 is sequentially sent to each inspection station as the star wheel 9 rotates intermittently.

  The inferior diameter inspection apparatus of the illustrated example is arranged at any of the inspection stations, and supports a glass bottle 1 to be inspected and rotates at least once around the central axis c of the glass bottle 1. And first and second body diameter detection sensors 3 and 4 having roller contactors 30 and 40 which are brought into contact with the outer peripheral surface of the body 10 of the glass bottle 1 in a pressed state, respectively. Yes. In the figure, reference numeral 8 denotes a cylindrical column that supports the first and second barrel diameter detection sensors 3 and 4 so as to be individually movable up and down.

  The rotation drive mechanism 2 includes a rotation-free inspection table 20 for supporting the bottom of the glass bottle 1 to be inspected on the upper surface, and the glass bottle 1 so that its central axis c is positioned at the rotation center of the inspection table 20. The upper and lower rotatable support rollers 21 and 22 for positioning the glass bottle 1 and the drive roller 23 for rotating the glass bottle 1 at least once around the central axis c of the glass bottle 1 are provided. The upper support roller 21 supports the neck portion 14 of the glass bottle 1 and the lower support roller 22 supports the lower position of the body portion 10 of the glass bottle 1 so as to freely rotate. The driving roller 23 is rotationally driven by a motor (not shown) and is in contact with the lower position of the outer peripheral surface of the barrel 10 of the glass bottle 1. The glass bottle 1 is sandwiched between the support rollers 21 and 22 and the driving roller 23, and rotates around the central axis c by the frictional force between the driving roller 23 and the outer peripheral surface of the glass bottle 1.

In the first body diameter detection sensor 3, the roller contact 30 abuts on the position (contact point) of the reinforcing portion 11 on the upper end side of the body portion 10 of the glass bottle 1, and the radius R of the body portion 10 at the contact portion. ₁ (hereinafter referred to as “body diameter R ₁ ”) is detected over the entire circumference. The second body diameter detection sensor 4 has a roller contact 40 at a predetermined height position in the non-reinforcing portion 13 (recess surface) of the body portion 10 of the glass bottle 1, and the roller of the first body diameter detection sensor 3. Abutting at the same angular position as the contact 30, the radius R ₂ (hereinafter referred to as “trunk diameter R ₂ ”) of the trunk portion 10 of the abutting portion is detected over the entire circumference.

The first body diameter detection sensor 3 includes a roller contact 30 at the tip and an arm 32 that is supported by a main body bracket 31 so as to freely reciprocate. The roller contact 30 faces the outer peripheral surface of the glass bottle 1 to be inspected. And an arm 32 that follows the movement of the roller contact 30 abutting against the outer peripheral surface of the glass bottle 1. It is composed of a displacement sensor 34 for converting into an electric signal corresponding to the barrel diameter R ₁ of the glass bottle 1 the displacement.

Further, the second body diameter detection sensor 4 has the same configuration as the first body diameter detection sensor 3, and has an arm 42 which is provided with a roller contact 40 at the tip and is freely reciprocated by a main body bracket 41. A spring 43 interposed between the main body bracket 41 and the roller contact 40 to urge the roller contact 40 toward the outer peripheral surface of the glass bottle 1 to be inspected, and the outer peripheral surface of the glass bottle 1 and the displacement of the arm 42 to follow the movement of the contact with the roller contacts 40 is composed of a displacement sensor 44 for converting into an electric signal corresponding to the barrel diameter R ₂ of the vial 1 in.

In this embodiment, as the displacement sensors 34 and 44 of the body diameter detection sensors 3 and 4, a differential transformer type is used, but various types such as an optical type can be used. Each displacement sensor 34, 44 includes primary and secondary coils (not shown) and a movable iron core, and the displacement of the arms 32, 42 is transmitted to detectors 35, 45 integral with the movable iron core.
The arms 32 and 42 in this embodiment are straight and reciprocate in the length direction, and the detectors 35 and 45 of the displacement sensors 34 and 44 are in contact with the rear end surfaces of the arms 32 and 42. However, as shown in FIG. 3, when the arms 32 and 42 are bent and swing around the bent portions as the fulcrums, the peripheral surfaces of the rear ends of the arms 32 and 42 The detectors 35 and 45 of the displacement sensors 34 and 44 are brought into contact with each other, and the spring force by the springs 33 and 43 is applied.

The first body diameter detection sensor 3 detects the body diameter R ₁ in the reinforcing portion 11 on the upper end side of the glass bottle 1 over the entire circumference. On the other hand, the second cylinder diameter detection sensor 4 detects the entire circumference of the trunk diameter R ₂ in a predetermined height position of the non-reinforcing portion 13 of the vial 1. As shown in FIG. 4, the displacement sensors 34, 44 of the first and second cylinder diameter detection sensors 3, 4 are positioned at predetermined height positions of the cylinder diameter R ₁ and the non-reinforced part 13 in the upper reinforcing part 11. Detection voltages V ₁ and V ₂ that are proportional to the sizes of the trunk diameters R ₁ and R ₂ are output as electrical signals corresponding to the trunk diameter R ₂ .

The detection voltages V ₁ of the first cylinder diameter detection sensor 3 and the detection voltage V ₂ of the second cylinder diameter detection sensor 4 is input to the comparator circuit 5, including a comparator. The comparison circuit unit 5 compares the detection voltages V ₁ and V ₂ over the entire circumference of the glass bottle 1 and is detected by the second body diameter detection sensor 4 at any angular position θ as shown in FIG. when the voltage V ₂ becomes larger than the detection voltages V ₁ of the first cylinder diameter detection sensor 3, rises comparison output V _out, the output cylinder improper diameter signal i indicating that cylinder diameter is defective to the controller 6 Is done.

  The control device 6 is constituted by a computer, and includes a CPU that is the subject of calculation and control, a memory that stores programs and data, and the like, and a motor that is a drive source of the drive roller 23 of the rotation drive mechanism 2. Is driven to rotate the glass bottle 1 to be inspected at least once. Further, it receives a body diameter defect signal i from the comparison circuit unit 5 and outputs a reject signal j to the reject mechanism 7. Although not shown, the reject mechanism 7 is arranged along a conveyor from which the inspected glass bottle 1 is led out. When the reject signal j is received from the control device 6, the corresponding glass bottle 1 is replaced with a defective product. As a result, it is discharged from the conveyor to the reject table.

FIG. 6 shows the flow of control of the cylinder diameter defect inspection by the control device 6. In the figure, “ST” is an abbreviation for “STEP” and indicates each procedure in the flow of control.
In ST1 of the figure, it is determined whether or not the glass bottle 1 to be inspected is introduced and supported on the inspection table 20, and when the determination is “YES”, the rotation to the glass bottle 1 to be inspected is driven. By contacting the roller 23, the glass bottle 1 rotates around the central axis c of the glass bottle 1 together with the inspection table 20. When the glass bottle 1 rotates, the roller contact 30 of the first body diameter detection sensor 3 comes into contact with the position of the reinforcing portion 11 on the outer peripheral surface of the body portion 10 of the glass bottle 1 and the non-reinforcing portion of the body portion 10. The roller contact 40 of the second body diameter detection sensor 4 is in contact with the roller contact 30 of the first body diameter detection sensor 3 at the predetermined height position 13. Then, during at least one rotation of the glass bottle 1, whether or not the body portion 10 of the glass bottle 1 has a body diameter defect, that is, the body diameter R _{1 of the} reinforcing portion 11 at any angular position on the outer peripheral surface of the glass bottle _1. It is detected in the comparison circuit unit 5 whether or not is larger than the trunk diameter R ₂ of the non-reinforced portion 13.

  In the next ST2, the control device 6 determines whether or not the set time has elapsed after the introduction of the glass bottle 1, that is, whether or not the time required for the glass bottle 1 to rotate at least once around the central axis c has elapsed. If the set time elapses without detecting a body diameter defect, the determination in ST2 is “YES” and the process returns to ST1, and the control device 6 waits for the introduction of the next glass bottle 1.

When a barrel diameter failure is detected in the barrel 10 of the glass bottle 1 after the introduction of the glass bottle 1 until the set time elapses, that is, at any angular position on the outer peripheral surface of the glass bottle 1. When the comparison circuit unit 5 detects that the trunk diameter R ₂ of the reinforcement portion 13 is larger than the trunk diameter R ₁ of the reinforcement portion 11, the comparison circuit unit 5 outputs a trunk diameter defect signal i to the control device 6. . As a result, the determination at ST2 is “NO”, and the subsequent determination at ST3 is “YES”. Next, the control device 6 confirms that the glass bottle 1 has been led out in ST4, holds the reject signal j until the glass bottle 1 reaches the position of the reject mechanism 7, and then outputs it to the reject mechanism 7 (ST5). ).

In the above embodiment, the first body diameter detection sensor 3 detects the body diameter R ₁ of the reinforcing portion 11 on the upper end side of the glass bottle 1 over the entire circumference, and the second body diameter detection sensor 4. a predetermined a trunk diameter R ₂ of the height position detected over the entire circumference, detection output of the second cylinder diameter detection sensor 4 at any angular position the first cylinder of the non-reinforcing portion 13 of the vial 1 Although the comparison circuit unit 5 is configured to output the barrel diameter defect signal i when the detection output by the diameter detection sensor 3 is larger than the detection output, the first barrel diameter detection sensor 3 is a reinforcement on the lower end side of the glass bottle 1. The body diameter of the portion 12 is detected over the entire circumference, and when the detection output by the second body diameter detection sensor 4 is greater than the detection output by the first body diameter detection sensor 3 at any angular position, the comparison circuit unit 5 outputs the trunk diameter defect signal i It may form.
Further, the body diameter R ₁ of the upper end of the reinforcing portion 11 of the vial 1 in addition to the first cylinder diameter detection sensor 3 that detects over the entire circumference, the body diameter of the reinforcing portion 12 of the lower side of the glass bottles 1 total A third body diameter detection sensor for detecting the circumference is further provided, and the detection output by the second body diameter detection sensor 4 at any angular position is the detection output by the first body diameter detection sensor 3 or the third body diameter. You may comprise so that the comparison circuit part 5 may output a trunk diameter defect signal, when larger than the detection output by a detection sensor.
In the case of a glass bottle in which a reinforcing portion is formed only once on the upper end side or the lower end side, it goes without saying that the same inspection is performed by bringing the first body diameter detection sensor 3 into contact with the reinforcing portion. Absent.

DESCRIPTION OF SYMBOLS 1 Glass bottle 2 Rotation drive mechanism 3 1st body diameter detection sensor 4 2nd body diameter detection sensor 5 Comparison circuit part 10 Body part 11,12 Reinforcement part 13 Non-reinforcement part 30,40 Roller contact 32,42 Arm 33 , 43 Spring 34, 44 Displacement sensor

Claims (2)

For a container in which a reinforced portion reinforced with strength is formed around a predetermined height position of the body portion, a body diameter defect inspection is performed to determine whether the reinforced portion protrudes from a non-reinforced portion that is not reinforced. For inspecting the body diameter defect,
A rotation drive mechanism that supports the container to be inspected and rotates at least once around the central axis of the container, and a roller contact is brought into contact with the position of the reinforcing portion of the body of the container to A first body diameter detection sensor for detecting the body diameter over the entire circumference, and a roller contact at the same angular position as the roller contact of the first body diameter detection sensor in the non-reinforcing portion of the body of the container A second body diameter detection sensor that makes contact and detects the body diameter of the contact portion over the entire circumference, and the detection output by the first body diameter detection sensor and the detection output by the second body diameter detection sensor are all output. A comparison circuit unit for detecting whether the body diameter of the reinforcing portion is larger than the body diameter of the non-reinforcing portion at any angular position on the outer peripheral surface of the container by comparing over the circumference . The second trunk diameter at an angular position of Sensor by the detection output is first cylinder diameter detecting container body improper diameter inspection apparatus that outputs a signal indicating that the trunk diameter when greater than the detection output by the sensor is defective out   Each of the first and second body diameter detection sensors includes a reciprocating free arm having the roller contact at the tip, and a spring for biasing the roller contact toward the outer peripheral surface of the container to be inspected. And a displacement sensor that converts the displacement of the arm following the movement of the roller contact into an electrical signal corresponding to the displacement of the container and outputs the electrical signal. Defect inspection device.

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