Inspection equipment for cylindrical objects

Abstract

To provide a specific inspection device for cylindrical bodies.SOLUTION: An inspection device for cylindrical bodies is provided, comprising a transport device 1, a rotation device 2; and a measurement device 3. The transport device 1 is configured to move a cylindrical body 7 relative to the measurement device 3. The rotation device 2 and the transport device 1 are configured to rotate the cylindrical body 7 while the cylindrical body 7 is moving relative to the measurement device 3. The measurement device 3 is configured to measure the cylindrical body 7 while the cylindrical body 7 is moving relative to the measurement device 3 and while the cylindrical body is rotating.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a specific inspection device for quality assurance of cylindrical bodies and to a specific bundle of cylindrical bodies with improved straightness.

[0002] The present invention relates to an inspection apparatus for cylindrical bodies, comprising: i) a conveying apparatus; ii) a rotating apparatus; and iii) a measuring apparatus, wherein the conveying apparatus is configured to move the cylindrical body relative to the measuring apparatus, the rotating apparatus and the conveying apparatus are configured to rotate the cylindrical body while the cylindrical body moves relative to the measuring apparatus, and the measuring apparatus is configured to measure the cylindrical body while the cylindrical body moves relative to the measuring apparatus and while the cylindrical body is rotating. Further, the present specification discloses a specific bundle of cylindrical bodies with improved straightness that can be obtained by using the specific inspection apparatus. [Background technology]

[0003] There is an ever-increasing demand for high-quality cylinders, as cylinders of insufficient quality can lead to high reject rates and machine breakdowns. For example, damaged or broken cylinders can contaminate machines with particles, which exceed dimensional tolerances. In the field of pharmaceuticals, such as vials, cartridges, syringes, or ampoules, economic competition is intensifying, making efficient production essential. This can only be achieved if the cylinders, which may be intermediate products of these pharmaceuticals, are of high quality. This makes the curvature of the cylinder, in particular, an important quality criterion. If the cylinder exhibits a large curvature, the cylinder, e.g., a glass tube, may be damaged or broken when further processed into pharmaceuticals such as vials, cartridges, syringes, or ampoules.

[0004] In order to obtain high-quality cylinders, numerous measures are required. For example, it is possible to improve the cylinder manufacturing process, such as the Danner or Vero process. However, these improvements have certain limitations, and in many cases the costs exceed the resulting benefits. Furthermore, there is a certain quality level that cannot be reliably achieved for all cylinders. Generally, produced cylinders can be packaged and bundled without inspection. This has the disadvantage that even if the overall average quality is high, if one cylinder is of low quality, this will only become apparent at the processor's site, which may lead to machine breakdowns and further costs.

[0005] Another approach to improving the overall quality of cylinders is to produce cylinders with a certain average quality and sort out cylinders with a quality below a certain value to improve overall quality. Therefore, it is important to evaluate the entire circumference of the cylinder to obtain an appropriate evaluation of the cylinder. To perform the evaluation on the production line, a fast, efficient, and reliable evaluation is required. Therefore, a fast, efficient, and reliable evaluation of the entire circumference can only be achieved if the cylinder is rotated around its own axis. This can only be achieved if the device continuously rotates the cylinder while measurements are being performed, or if the device repeatedly rotates the cylinder by a specific angle and performs a measurement at each angle. When the cylinder is repeatedly rotated, it must usually be removed from a conveying device, inserted into an inspection device, inspected, and then inserted back into the conveying device. This procedure is very time-consuming. Summary of the Invention [Problem to be solved by the invention]

[0006] It is therefore an object of the present invention to provide an inspection device for inspecting the entire circumference, in particular the curvature, of cylindrical bodies which overcomes the above-mentioned drawbacks.It is a further object of the present invention to provide an inspection device for cylindrical bodies which allows inspection without removing the cylindrical body from the transport device.It is a further object of the present invention to provide an inspection device for cylindrical bodies which allows faster, more efficient and more reliable measurement of the cylindrical body.

[0007] A further object of the present invention is to provide a bundle of cylinders that allows for improved, preferably complete, post-processing. [Means for solving the problem]

[0008] Surprisingly, the inventors have found that the above object can be achieved by an inspection apparatus for cylindrical bodies, comprising: i) a conveying device; ii) a rotating device; and iii) a measuring device, wherein the conveying device is configured to move the cylindrical body relative to the measuring device, the rotating device and the conveying device are configured to rotate the cylindrical body while it is moving relative to the measuring device, and the measuring device is configured to measure the cylindrical body while it is moving relative to the measuring device and while it is rotating.

[0009] As used herein, a cylinder is an object having at least one hollow or solid cylindrical section, which is long enough and has an appropriate outer diameter so that it can be measured in an inspection device. The cylindrical section defines a rotation axis. Preferably, the cylinder is made of a polymer or glass, more preferably cyclic olefin copolymer (COC), cyclic olefin copolymer (COP), aluminosilicate glass, or borosilicate glass. Preferably, the cylinder is selected from the group consisting of a tube, pipe, vial, ampoule, syringe, and cartridge, which may be sealed on one or both sides, and is preferably a tube or vial, which may be sealed on one or both sides, more preferably a tube, which may be sealed on one or both sides, and more preferably a tube, which is sealed on both sides.

[0010] The length and outer diameter of the cylindrical portion are not particularly limited. However, if the length of the cylindrical portion is too short, the ratio of the contact plane between the cylindrical portion and the inspection device to the plane that does not contact the inspection device during inspection increases. If the length of the cylindrical portion is too long, handling of the cylindrical body may be hindered, for example, by bending, thereby reducing the accuracy of the inspection. Therefore, the preferred length of the cylindrical portion of the cylindrical body is 1 cm to 1000 cm, preferably 20 cm to 400 cm, more preferably 60 cm to 300 cm, more preferably 100 cm to 200 cm, and most preferably 120 cm to 180 cm, and / or the outer diameter of the cylindrical portion of the cylindrical body is 2 mm to 100 mm, more preferably 4 mm to 50 mm, more preferably 6 mm to 35 mm, more preferably 8 mm to 25 mm, and most preferably 10 mm to 20 mm. Preferably, the inspection device comprises a cylindrical body.

[0011] As used herein, any term in the singular shall be understood to include the plural, and any term in the plural shall be understood to include the singular. In particular, as used herein, all limitations and preferred embodiments of a single cylinder also apply to a plurality, e.g., five or more cylinders. Furthermore, all limitations and preferred embodiments of an inspection device also apply to a bundle, and vice versa, unless otherwise specified.

[0012] As used herein, a plane is a plane of the device that will come into contact with the cylinder. The plane of the device itself may have any shape, such as a cylindrical or cubic shape, which may be rounded or flat. Regardless of the shape of the plane, what is important for specifying parameters herein, such as calculating angles or contact points, is the plane of the device that will come into contact with the cylinder when the cylinder is in the inspection device. As used herein, "flat" means that the plane has substantially no curvature, preferably no curvature, in the area where the measurement is performed.

[0013] As used herein, a bundle refers to a transaction unit, loading unit, or packaging unit for distributing cylinders. For example, when bulk orders are placed at retail stores or bundled for logistics purposes, products of the same type are typically, but not necessarily, combined into a bundle. According to the present invention, the cylinders in a bundle may be separated by spacers, such as plastic or paper sheets, to prevent the cylinders from contacting each other during transportation. Typically, but not necessarily, the bundle is at least partially covered with plastic foil. Preferably, one bundle contains 5 to 5,000 cylinders, preferably 10 to 1,000 cylinders, more preferably 25 to 500 cylinders, more preferably 50 to 300 cylinders, and most preferably 75 to 250 cylinders. An example of a bundle is DENSOPACK® from SCHOTT AG. For economic reasons, preferably, a bundle contains 25 to 500, more preferably 50 to 300, and most preferably 75 to 250 cylinders, which are at least partially covered by plastic foil and in direct contact with each other within the bundle. Preferably, the length of the cylindrical portion of the cylinders in the bundle is 1000 mm or more.

[0014] As used herein, "relative movement" refers to a movement in which the distance or angle, preferably the distance, of a specific object, such as a measuring device, relative to a specific object, such as a cylinder, changes. Rotation of the cylinder alone is not "relative movement" because neither the distance nor the angle changes relative to another specific object.

[0015] In this specification, "while the cylinder is moving" or "while the cylinder is rotating" means that the cylinder is moving or rotating at least during that period.

[0016] The inspection apparatus for cylindrical bodies comprises a conveying device, a rotating device, and a measuring device. Minor modifications may be made to the inspection apparatus without departing from the scope of the present disclosure.

[0017] Conveyor The conveying device is configured to move the cylindrical body relative to the measuring device. The shape of the conveying device is not particularly limited. In general, the conveying device comprises a conveying plane configured to support the cylindrical body when the cylindrical body is not in contact with the rotating device, and a feed plane configured to urge the cylindrical body forward. In particular, the feed plane is configured to urge the cylindrical body forward when the cylindrical body is in contact with the rotating device. Preferably, the feed plane is statically attached to the conveying plane, preferably the feed plane is a rod statically attached to the conveying plane, and more preferably the feed plane is a rod statically attached to the conveying plane and extending perpendicular to the conveying plane.

[0018] The materials of the conveying plane and the feed plane are not particularly limited. Preferably, the materials are adapted in terms of their frictional properties to achieve optimal rotation of the cylindrical body and minimize wear of the material in contact with the cylindrical body. If the conveying plane is made of a polymer, preferably an elastomer, most preferably silicone rubber, wear during conveyance of the cylindrical glass body can be minimized. Furthermore, if the feed plane is made of a material such as polymer, graphite, or wood, preferably graphite, friction between the cylindrical body and the conveying device can be minimized, for example, to reduce defects in the cylindrical body.

[0019] The inspection apparatus may comprise one or more transport devices, for example two, three or four. Preferably, the inspection apparatus comprises two transport devices, both of which are parallel to each other or whose distance varies within the inspection apparatus, and more preferably, the inspection apparatus comprises two transport devices, both of which are parallel to each other.

[0020] Generally, the speed of the conveying device is not limited, but a speed of the conveying device of 1 m / s or less, preferably 0.001 to 1 m / s, preferably 0.001 to 0.5 m / s, more preferably 0.005 to 0.25 m / s, and most preferably about 0.01 to 0.2 m / s, allows for rapid yet highly accurate inspection of the cylindrical object.

[0021] Rotating device Generally, the rotating device includes a rotating plane. The shape of the rotating plane is not particularly limited. The shape of the rotating plane may be cylindrical or cubic.

[0022] The material of the rotating plane is not particularly limited, but if the rotating plane is made of a polymer, preferably an elastomer, most preferably silicone rubber, it is possible to minimize wear during transport of the cylinder and reduce the load of particles on the cylinder.

[0023] In one embodiment, the rotation device comprises a static rotation plane, i.e., the rotation plane does not move relative to the measuring device while the cylindrical body is being inspected, which has the advantage of simplifying the construction and thus saving maintenance costs and time.

[0024] In another embodiment, the rotating device includes a moving rotating plane, which moves relative to the measuring device and the conveying device. More preferably, the moving rotating plane is configured to move in a counter-direction relative to the conveying plane. More preferably, the moving rotating plane is configured to move in a counter-direction relative to the conveying plane at a speed of 0.001 km / h to 10 km / h, preferably 0.001 m / s to 0.5 m / s, more preferably 0.002 m / s to 0.3 m / s, more preferably 0.005 m / s to 0.25 m / s, and most preferably 0.01 m / s to 0.2 m / s. This allows for more rapid inspection of the cylindrical object. By increasing the rotational speed during inspection relative to the conveying speed of the conveying device, redundant inspection of the entire circumference can be achieved. This high rotational speed can be achieved by a moving rotating plane configured to move in a counter-direction relative to the conveying plane.

[0025] In one embodiment, the rotating device comprises a rotating plane, which is a flat rotating plane. In another embodiment, the rotating plane is a non-flat rotating plane. Preferably, the rotating plane is a flat rotating plane.

[0026] Preferably, the width of the rotating plane is 0.1 mm to 200 mm, preferably 1 mm to 5 mm. If the width is too narrow, the friction force required to rotate the cylindrical body will be insufficient. Conversely, if the width is too wide, the contact area of ​​the rotating plane will increase, which may increase defects in the cylindrical body.

[0027] Preferably, the length of the rotating plane is 1 to 300 cm, preferably 5 to 200 cm, more preferably 10 to 50 cm. If the rotating plane is too short, uniform measurement becomes impossible. On the other hand, if the rotating plane is too long, the contact area of ​​the rotating plane increases, which may increase defects in the cylinder.

[0028] The inspection apparatus may include one or more rotation devices, for example, two, three, or four. In one embodiment, the rotation devices are arranged diagonally within the inspection apparatus. In another embodiment, the inspection apparatus includes two rotation devices, both parallel to each other or with varying distances within the inspection apparatus, and more preferably, the inspection apparatus includes two rotation devices, both parallel to each other.

[0029] Rotating and conveying devices The rotating device and the conveying device are configured to rotate the cylinder while the cylinder moves relative to the measuring device. During the rotation of the cylinder, the cylinder preferably does not contact the conveying plane of the conveying device. Thus, generally, the conveying device comprises a conveying plane and a feed plane, and the rotating device comprises a rotating plane, and during rotation, the cylinder is in contact with the feed plane of the conveying device and the rotating plane of the rotating device, but is not in contact with the conveying plane of the conveying device, thereby facilitating rotation.

[0030] Preferably, at least a portion of the rotation plane is parallel to the conveying plane. Preferably, the feed plane and the rotation plane are perpendicular to each other. Preferably, the conveying device and the rotating device are configured to raise the cylinder while the cylinder is moving relative to the measuring device and while the cylinder is rotating. Therefore, preferably, the conveying device and the rotating device have inclined rotation planes, and these inclined rotation planes are configured to raise the cylinder while the cylinder is moving relative to the measuring device and while the cylinder is rotating. Such a configuration reduces frictional forces affected by gravity, making it possible to prevent defects.

[0031] More preferably, at least a portion of the rotation plane is parallel to the conveying plane, the feed plane and the rotation plane are perpendicular to each other, and the rotation plane is an inclined rotation plane, which is configured to raise the cylinder while it is moving relative to the measuring device as well as while it is rotating.

[0032] Preferably, the conveying device and the rotating device are not in contact with each other. Therefore, both devices can be installed separately, and the maintenance work of the inspection device can be reduced. Furthermore, if the conveying device and the rotating device are not directly connected to each other, it is possible to adjust the contact area between the cylinder and the conveying device and the contact area between the cylinder and the rotating device. Therefore, defects can be prevented.

[0033] The inspection apparatus may comprise one or more rotation devices and one or more transport devices. In a preferred embodiment, the inspection apparatus comprises more than one rotation device and more than one transport device, which are parallel to each other or whose distance varies within the inspection apparatus, and more preferably, the inspection apparatus comprises more than one, preferably two rotation devices and more than one, preferably two transport devices, which are parallel to each other.

[0034] Measuring equipment The measurement device is configured to measure the cylinder while the cylinder is moving relative to the measurement device as well as while the cylinder is rotating.

[0035] Generally, several parameters can be measured. The inspection device may be equipped with one or more measurement devices, which allow one or more parameters to be detected simultaneously, or one parameter to be determined at different positions on the cylinder while the cylinder rotates and moves in one direction.

[0036] Generally, the measuring device measures at least a portion of the cylinder. However, it is possible for one or more measuring devices to measure one or more portions of the cylinder, and it is also possible for one measuring device to measure the entire cylinder. Preferably, the measuring device measures one or more portions of the cylinder, and more preferably, the measuring device measures the entire cylinder.

[0037] Preferably, the angle between the normal to the feed plane and the center line of the measuring device, e.g., a camera, and / or preferably the angle between the rotation plane and the center line of the measuring device is greater than 45° and less than 135°, preferably between 60° and 120°, more preferably between 70° and 110°, more preferably between 80° and 100°, more preferably between 85° and 95°, and most preferably 90°.

[0038] Preferably, the measuring device measures the curvature and the angle between the normal to the feed plane and the centerline of the measuring device, and / or preferably, the angle between the rotation plane and the centerline of the measuring device is greater than 45° and less than 135°, preferably between 60° and 120°, more preferably between 70° and 110°, more preferably between 80° and 100°, more preferably between 85° and 95°, and most preferably 90°. Surprisingly, the inventors have found that an angle close to 90°, for example between 70° and 110°, allows the curvature of a cylinder to be measured without being affected by other variations in the cylinder, such as variations in the thickness or ovality of the cylinder (see detailed description below). A particular angle can be achieved by using more than one measuring device or by using only one measuring device if the distance between the measuring device and the cylinder is sufficiently long, for example 20-200 cm, preferably 30-100 cm, most preferably 40-60 cm, so that the angle changes only slightly while the cylinder is moving relative to the measuring device as well as while the cylinder is rotating.

[0039] Preferably, the measurement device is an object and geometry inspection device, preferably equipped with laser technology or a camera. More preferably, the measurement device is a camera. In this specification, the centerline of the measurement device, e.g., a camera, is the normal line extending from the center of the lens of the measurement device, e.g., a camera.

[0040] Sorting Equipment The inspection device may optionally include a sorting device configured to sort out cylinders having a quality below a certain value, and any value measured by the measuring device may be selected, such as the curvature of the cylinder.

[0041] Cylinders with a quality below a certain value may be sorted out, for example, by a gripper, an air blast, a trap door, preferably a trap door.

[0042] bundle of cylinders Using the above-described inspection device, it is possible to obtain bundles of cylinders with improved straightness, which can be used in very demanding applications. Furthermore, cylinders with low quality can be separated and further used in less demanding applications. Using the above-described inspection device, it is not particularly necessary to produce cylinders of exceptional quality, as long as some cylinders exhibit sufficient quality for a bundle of cylinders with high quality. Furthermore, using the above-described device, it is possible to ensure that all cylinders in a bundle are of very high quality, since all cylinders are measured. For some applications, even a few cylinders below a certain quality level are not sufficient. Furthermore, using the above-described inspection device, it is possible to obtain custom bundles of cylinders with specific qualities. In particular, the curvature of cylinders can be reliably inspected with the above-described inspection device, as will be explained in detail in the examples and methods in the measurement section below.

[0043] As a result, by using the above-described inspection device, it is possible to obtain a bundle having five or more cylinders, in which all of the cylinders in the bundle exhibit a curvature of 1 mm or less. Preferably, all of the cylinders in the bundle exhibit a curvature of 0.9 mm or less, more preferably 0.8 mm or less, more preferably 0.7 mm or less, more preferably 0.6 mm or less, more preferably 0.5 mm or less, more preferably 0.4 mm or less, more preferably 0.3 mm or less, more preferably 0.2 mm or less, and more preferably 0.1 mm or less. The lower limit is not particularly limited. For economic reasons, it is preferable that all of the cylinders in the bundle exhibit a curvature of 0.01 mm or more.

[0044] Preferably, all cylinders in the bundle exhibit a curvature of 1 mm or less, preferably 0.9 mm or less, more preferably 0.8 mm or less, more preferably 0.7 mm or less, more preferably 0.6 mm or less, more preferably 0.5 mm or less, more preferably 0.4 mm or less, more preferably 0.3 mm or less, more preferably 0.2 mm or less, more preferably 0.1 mm or less, and / or more preferably all cylinders in the bundle exhibit a curvature of 0.01 mm or more, and / or more preferably the cylinders are tubes, and / or more preferably the cylinders consist of a polymer or glass, more preferably cyclic olefin copolymer (COC), cyclic olefin copolymer (COP), aluminosilicate glass or borosilicate glass, and / or Alternatively, more preferably, the length of the cylindrical portion of the cylinder is from 1 cm to 1000 cm, preferably from 20 cm to 400 cm, more preferably from 60 cm to 300 cm, more preferably from 100 cm to 200 cm, and most preferably from 120 cm to 180 cm, and / or the outer diameter of the cylindrical portion of the cylinder is from 2 mm to 100 mm, more preferably from 4 mm to 50 mm, more preferably from 6 mm to 35 mm, more preferably from 8 mm to 25 mm, and most preferably from 10 mm to 20 mm, and / or more preferably, one bundle contains 5 to 5000 cylinders, preferably from 10 to 1000 cylinders, more preferably from 25 to 500 cylinders, more preferably from 50 to 300 cylinders, and most preferably from 75 to 250 cylinders.

[0045] Preferably, all cylinders are measured by the inspection device according to the present invention. Details of the curvature measurement are explained below. [Brief explanation of the drawings]

[0046] [Figure 1] 1 shows a side view of an inspection device according to the present invention. [Figure 2] 1 shows a side view of an inspection device according to the present invention. [Figure 3] 1 shows a top view of an inspection device according to the present invention; [Figure 4]1 shows a top view of an inspection device according to the present invention; [Figure 5] Illustrates how curvature is measured. [Figure 6] Illustrates how curvature is measured. [Figure 7] Illustrates how curvature is measured. [Figure 8] Illustrates how curvature is measured. DETAILED DESCRIPTION OF THE INVENTION

[0047] An example of an inspection device according to the present invention is shown in Figures 1 to 4. Side views of the inspection device are shown in Figures 1 and 2, and top views of the inspection device are shown in Figures 3 and 4. Figures 5 to 8 show how curvature is measured.

[0048] In all the examples shown in Figures 1 to 4, the inspection apparatus has in common the conveying device 1, the rotating device 2, and the measuring device 3. The conveying device 1 has a conveying plane 4 and a feed plane 5. Typically, the inspection apparatus includes two conveying devices 1, each of which has a conveying plane 4 to which one or more feed planes 5 are fixed. The rotating device 2 has two rotation planes 6 / 6a. Typically, the inspection apparatus includes two rotation devices 2. The rotation plane 6 / 6a may be a static rotation plane 6 (Figure 1), or preferably, may include a movable rotation plane 6a that moves in the opposite direction relative to the conveying device 1 (see Figure 2).

[0049] The inspection apparatus includes one or more measuring devices 3, which may be positioned at any location within the inspection apparatus. The location of the measuring device 3 thus depends on the characteristic to be measured. When the inspection apparatus includes more than one measuring device 3, more than one characteristic can easily be measured within one inspection apparatus. In some cases, it may be necessary to install more than one measuring device 3 of the same type to obtain a complete view of the cylindrical body 7. In one example, the two rotation planes 6 / 6a and / or the two conveying planes 4 are parallel (FIG. 3). In another example, the distance between the two rotation planes 6 / 6a and / or the distance between the two conveying planes 4 varies, i.e., narrows (FIG. 4) or widens (FIG. 4). This may be beneficial when the measuring device 3 needs to measure through the cylindrical body 7. In this case, more than one measuring device 3 of the same type may be installed at different locations to obtain a complete inspection of the entire cylindrical body 7 (FIG. 4). Another example (not shown) with the same effect is an inspection apparatus in which one rotation device 2 is positioned obliquely in a top view. The conveying device 1 is configured to move a cylindrical body 7 relative to the measuring device 3. In FIGS. 1-4, one or more cylindrical bodies 7 move in a specific direction 8. When the cylindrical body 7 reaches the inspection device, the cylindrical body 7 is in contact with at least the conveying plane 4, and typically with the conveying plane 4 and the feed plane 5. In the inspection device, the cylindrical body 7 contacts the rotation plane 6 / 6a during further movement relative to the measuring device 3. Due to the different speed of the rotation plane 6 / 6a compared to the feed plane 5, the cylindrical body 7 begins to rotate about its rotation axis. One or more measuring devices 3 measure one or more characteristics while the cylindrical body 7 moves relative to the measuring device 3 and while the cylindrical body 7 rotates. Due to the rotation of the cylindrical body 7 and the specific position and focus of the measuring device 3, the entire circumference of the cylindrical body 7 can be measured.

[0050] A method for measuring curvature will be described with reference to Figs. 5 to 8. The definition of the curvature of a cylinder 7 will be described with reference to Fig. 5. The cylindrical portion of the cylinder 7 is in contact with two defined contact points 11 having a distance of 1000 mm. In this specification, curvature is the maximum length 12 of deviation of the outer surface at any position on the cylinder from an ideal line 13 defined by the two contact points 11 when the cylinder 7 is rotated 360° around its rotation axis. If the cylindrical portion of the cylinder is longer than 1000 mm, the measurement is performed so that the center of the cylindrical portion of the cylinder is located in the middle of the two contact points.

[0051] 6 and 7 show an exemplary measurement of a cylindrical body 7 having a certain curvature. As can be seen in FIG. 6, during the measurement, the cylindrical body 7 is in contact with the feed plane 5 and the rotation plane 6 / 6a, which define two contact points 11, so that the cylindrical body 7 rotates while the feed plane 5 moves in the direction 8. The measurement is performed along the drawing line. A measuring device 3 (not shown) measures the position x of the contact point 11 and a position on the outer surface of the cylindrical body 7 between the contact points 11 over time t. As can be seen in FIGS. 6 and 7, at point T1, a position 14 on the outer surface of the cylindrical body 7 between the contact points 11 is always ahead of the position of the contact point 11, which has the same value; therefore, position 14 has a higher value x. The length between the two contact points 11 and 14 is the deviation length 12 of the outer surface of the cylindrical body. At point T2, the curvature projects into the drawing plane, and the position on the outer surface of the cylinder 7 between the contact points 11 and the position of the contact point 11 have the same value x. At point T3, the bend projects in the direction opposite to the direction of movement 8 of the feed plane 5. Therefore, the position on the outer surface of the cylinder 7 between the contact points 11 is behind the position of the contact point 11, and therefore, position 14 has a lower value x. In this case, too, the length between the two contact points 11 and 14 is the length 12 of the deviation of the outer surface of the cylinder. At point T4, the bend projects out of the drawing plane, and the position on the outer surface of the cylinder 7 between the contact points 11 and the position of the contact point 11 have the same level. At point T5, the cylinder 7 has rotated 360°, and the measurement result is the same as that of T1. The curvature is the longest distance, evaluated by the above-described method, at any position on the cylinder between the two contact points 11. To obtain the curvature, i.e. the maximum length 12 of the deviation of the outer surface at any point on the cylinder from the ideal line 13, every point on the outer surface must be measured in the manner described above. All points can be measured sequentially or simultaneously.

[0052] 8 shows a schematic diagram of the angle 15 between the normal to the feed plane 5 and the measurement direction. Additionally, the angle 16 between the rotation plane 6 / 6a and the measurement direction is shown. Both angles are 90°.

[0053] Briefly, curvature is measured as described below. i) bringing the cylindrical portion of the cylinder 7 into contact with two defined contact points 11 having a distance of 1000 mm; ii) measuring the maximum length 12 of deviation of the outer surface of the cylinder at any point from the ideal line 13 defined by the two contact points 11 when the cylinder 7 is rotated 360° around its axis of rotation, i.e., the curvature; If the cylindrical part of the cylinder is longer than 1000 mm, the measurement is carried out so that the middle of the cylindrical part of the cylinder is in the middle of the two contact points. [Explanation of symbols]

[0054] 1. Conveyor device 2 Rotating device 3. Measuring equipment 4. Conveying plane 5 Feed plane 6 Rotation Plane 6a Movable rotation plane 6b Width of the rotation plane 6c Length of the plane of rotation 7 Cylinder 8. Direction of movement 10 Distance between two contact points: 10 11 contact points 12 The length of deviation of the outer surface of the cylinder 7, i.e., the curvature 13 Ideal line 14 Location on the outer surface of the cylinder 7 between the contact points 11 15 angle between the normal to the feed plane 5 and the center line of the measuring device 16 Angle between the plane of rotation 6 / 6a and the center line of the measuring device

Claims

1. 1. An inspection device for inspecting the axial curvature of a cylindrical body (7), said inspection device comprising: i) a conveying device (1); ii) a rotating device (2); iii) a measuring device (3); Equipped with The conveying device (1) is configured to move the cylindrical body (7) relative to the measuring device (3); the rotating device (2) and the conveying device (1) are configured to rotate the cylindrical body (7) while the cylindrical body (7) moves relative to the measuring device (3); the measuring device (3) is configured to measure the cylindrical body (7) while the cylindrical body (7) is moving relative to the measuring device (3) and while the cylindrical body (7) is rotating, The measuring device (3) is equipped with a camera, The conveying device (1) comprises a conveying plane (4) and a feeding plane (5), the angle between the normal to the feed plane (5) and the center line of the measuring device (3) is greater than 45° and less than 135°; The feed plane (5) is statically attached to the conveying plane (4), The rotating device (2) comprises a rotating plane (6), Inspection equipment.

2. The conveying plane (4) is made of a polymer, 2. An inspection device for a cylindrical body (7) according to claim 1.

3. The feed plane (5) is made of polymer, graphite or wood.

3. An inspection device for a cylindrical body (7) according to claim 1 or 2.

4. The plane of rotation (6) is made of a polymer. Inspection device for a cylindrical body (7) according to any one of claims 1 to 3.

5. At least a part of the rotation plane (6) is parallel to the conveying plane (4) and / or at least a part of the rotation plane (6) is perpendicular to the feed plane (5). Inspection device for a cylindrical body (7) according to any one of claims 1 to 4.

6. The rotating device (2) has a movable rotating plane (6a), which moves relative to the measuring device (3) and the conveying device (1). Inspection device for a cylindrical body (7) according to any one of claims 1 to 5.

7. The movable rotation plane (6a) is configured to move in a counter direction relative to the conveying device (1).

7. An inspection device for a cylindrical body (7) according to claim 6.

8. The movable rotation plane (6a) is configured to move at a speed of 0.001 km / h to 10 km / h. Inspection device for cylindrical bodies (7) according to claim 7.

9. The plane of rotation (6) is flat. Inspection device for a cylindrical body (7) according to any one of claims 1 to 8.

10. The conveying plane (4) and the rotating plane (6) are flat and parallel to each other. Inspection device for a cylindrical body (7) according to any one of claims 1 to 9.

11. The width (6b) of the rotation plane is 0.1 mm to 200 mm. Inspection device for a cylindrical body (7) according to any one of claims 1 to 10.

12. The length (6c) of the rotation plane is 1 cm to 50 cm. Inspection device for a cylindrical body (7) according to any one of claims 1 to 11.

13. The measuring device (3) is an object inspection device, Inspection device for a cylindrical body (7) according to any one of claims 1 to 12.

14. the angle between the plane of rotation and the centerline of the measuring device is greater than 45° and less than 135°; Inspection device for a cylindrical body (7) according to any one of claims 1 to 13.

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