Outer diameter measuring device, reel diameter measuring device, reel diameter measuring system, and reel diameter measuring method

Abstract

To enable safe, efficient, and accurate measurement of the outer diameter of cylindrical objects, such as the reel diameter of a mandrel. [Solution] An outer diameter measuring device for measuring the outer diameter of a cylindrical body A in a cross section perpendicular to the central axis direction, comprising: a jig 2; a pair of guides 5, 6 mounted on the jig 2, whose distance from each other is adjustable and which can grip the side surface of the cylindrical body A; an outer diameter measuring unit 7 that measures the outer diameter of the cylindrical body A gripped by the pair of guides 5, 6 based on the distance between the pair of guides 5, 6; and an output unit 8 that outputs outer diameter information of the outer diameter measured by the outer diameter measuring unit 7, wherein the pair of guides 5, 6 have curved surfaces formed on the upper ends of the surfaces that face each other and support the cylindrical body A.

Description

Technical Field

[0001] The present invention relates to an outer diameter measuring device, a reel diameter measuring device, a reel diameter measuring system, and a reel diameter measuring method.

Background Art

[0002] As an example of a member having a cylindrical body, a mandrel used for paying out or winding a metal strip can be mentioned. In a rolling line of a coiled metal strip, the metal strip wound around a mandrel of a pay-out device is paid out, and after undergoing pickling, rolling, and annealing, the metal strip is wound around a mandrel of a winding device.

[0003] The mandrel is provided with a mechanism for expanding and contracting the reel (hereinafter also referred to as expansion and contraction), and it is possible to contract the reel when inserting and removing the metal strip, and expand the reel when paying out and winding the metal strip. The reels of the mandrels of the pay-out device and the winding device are parts where the metal strip contacts the inner surface, and thus, in the ISO standard, it is stipulated to manage the dimensional accuracy of the reel diameter. Conventionally, the confirmation of the dimensional size of the reel diameter has been managed using general instruments such as a micrometer, and it is necessary to measure both the expanded size and the contracted size of the reel diameter.

[0004] When measuring the reel diameter of the mandrel, it is required to prevent the fall of an operator (measurer) associated with measurement at a high place. Also, in order to avoid dimensional changes when the hydraulic pressure of the pay-out device and the winding device stops, the reel diameter may be measured while expanding and contracting the reel, and it is also required to prevent being pinched or卷入 during the above measurement. Thus, in measuring the reel diameter of the mandrel, there are three problems: ensuring safety, shortening the measurement time, and suppressing variations in measurement accuracy by the measurer.

[0005] In the technology described in Patent Document 1, the parallelism between the mandrel and the unit roll is measured using a parallelism measuring jig. In this technology, parallelism is measured by bringing the mandrel into contact with the jig, but it was difficult to measure the diameter dimensions of the reel when it is expanded and contracted as defined by ISO.

[0006] In the technology described in Patent Document 2, the outer diameter of the reel is measured using an optical sensor. While this technology allows for diameter measurement using a laser, the configuration for linking various data in the measurement unit is complex, resulting in the problem of time-consuming setup of the device. Furthermore, measurement accuracy decreases if the device and mandrel are not installed parallel to each other, but parallel installation is time-consuming, making it difficult to shorten the measurement time. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Patent No. 5024217 [Patent Document 2] Patent No. 6278026 [Overview of the project] [Problems that the invention aims to solve]

[0008] Thus, the technologies described in Patent Documents 1 and 2 are not yet sufficient, and there has been a strong demand for the establishment of a technology that can measure the reel diameter of a mandrel more safely, efficiently, and with greater accuracy. Furthermore, as mentioned above, the mandrel described is just one example of a cylindrical component, and there has been a strong demand for the establishment of a technology that can measure the outer diameter of cylindrical bodies applicable to various uses.

[0009] This invention was made in view of the above-mentioned problems, and aims to provide a technology that enables the measurement of the outer diameter of a cylindrical body, such as the reel diameter of a mandrel, safely, efficiently, and accurately. [Means for solving the problem]

[0010] [1] An outer diameter measuring device for measuring the outer diameter of a cylindrical body in a cross section perpendicular to the central axis, Jig and, A pair of guides are installed on the jig, their spacing from each other is adjustable, and they are capable of gripping the sides of the cylindrical body. An outer diameter measuring unit that measures the outer diameter of the cylindrical body held between the pair of guides based on the distance between the pair of guides, The system comprises an output unit that outputs outer diameter information of the outer diameter measured by the outer diameter measuring unit, An outer diameter measuring device in which the pair of guides face each other and have curved portions formed on the upper ends of the surfaces that support the cylindrical body. [2] The jig is Lower jig and The lower jig is equipped with an upper jig which is installed above the lower jig and is rotatable with the upper direction as the axis of rotation of the rotation axis, The outer diameter measuring device according to [1], wherein the pair of guides are mounted on the upper jig. [3] A reel diameter measuring device for measuring the reel diameter of a mandrel used for dispensing or winding a metal strip, Jig and, A pair of guides are installed on the jig, their spacing from each other is adjustable, and they are capable of gripping the sides of the mandrel. A reel diameter measuring unit that measures the reel diameter of the mandrel held between the pair of guides based on the distance between the pair of guides, The system includes an output unit that outputs reel diameter information of the reel diameter measured by the reel diameter measuring unit, A reel diameter measuring device in which the pair of guides face each other and have curved portions formed on the upper ends of the surfaces that support the mandrel. [4] The jig is Lower jig and An upper jig that is installed above the lower jig and is rotatable with the upper direction as the axial direction of the rotation axis, The pair of guides is the reel diameter measuring device according to [3], which is installed on the upper jig. [5] The reel diameter measuring device according to [3] or [4], A control device including a receiving unit that receives the reel diameter information output by the output unit of the reel diameter measuring device. A reel diameter measuring system comprising the above. [6] Using the reel diameter measuring device according to [3] or [4], A reel diameter measuring method for measuring the reel diameter by a reel diameter measuring unit while changing the distance between a pair of guides of the reel diameter measuring device according to an increase or decrease in the reel diameter of a mandrel. [7] Using the reel diameter measuring system according to [5], Measuring the reel diameter by a reel diameter measuring unit while changing the distance between a pair of guides of the reel diameter measuring device according to an increase or decrease in the reel diameter of a mandrel, In the receiving unit of the control device, receiving the reel diameter information output by the output unit of the reel diameter measuring device, a reel diameter measuring method. [Advantages of the Invention]

[0011] According to the present invention, the outer diameter of a cylindrical body such as the reel diameter of a mandrel can be measured safely, efficiently, and with high accuracy. [Brief Description of the Drawings]

[0012] [Figure 1] FIG. 1 is a diagram for explaining the configuration of the reel diameter measuring system (outer diameter measuring system) of the present invention. [Figure 2] FIG. 2 is a diagram for explaining the outline of the reel diameter measuring device (outer diameter measuring device) of the present invention. [Figure 3] FIG. 3 is a diagram for explaining the guide. [Figure 4]Figure 4 is a diagram illustrating a method for measuring the reel diameter of a mandrel, as an example of a member having a cylindrical shape. [Figure 5] Figure 5 illustrates a mechanism for adjusting the inclination of the guide relative to the mandrel by rotating the upper jig on the lower jig. [Modes for carrying out the invention]

[0013] Embodiments of the present invention will be described below with reference to the drawings.

[0014] <Reel diameter measuring system (outer diameter measuring system) 10> Figure 1 is a diagram illustrating the configuration of the outer diameter measuring system (reel diameter measuring system) 10 of the present invention. As shown in Figure 1, the outer diameter measuring system 10 includes an outer diameter measuring device 1 and a control device 20 having a receiving unit 21 that receives outer diameter information output by an output unit 8 of the outer diameter measuring device 1.

[0015] The outer diameter measuring system 10 of the present invention is a system for measuring the outer diameter of a cylindrical body in a cross section perpendicular to the central axis direction, and is more preferably a reel diameter measuring system 10 for measuring the reel diameter of a mandrel used for dispensing or winding metal strips. In other words, the outer diameter measuring system 10 of the present invention is preferably a reel diameter measuring system 10 having a reel diameter measuring device 1 and a control device 20 having a receiving unit 21 that receives outer diameter information output by an output unit 8 of the reel diameter measuring device 1. In the following description of the outer diameter measuring system 10, we will use the reel diameter measuring system 10 as an example. Details of the reel diameter measuring device (outer diameter measuring device) 1 will be described later. The reel diameter of a mandrel refers to the outer diameter (diameter) of the cross-section perpendicular to the central axis of the cylindrical body (reel) of a mandrel on which a metal strip can be wound. Furthermore, the reel diameter of the mandrel is preferably between 300 and 700 mm.

[0016] The receiving unit 21 of the control device 20 can receive reel diameter information output by the output unit 8 of the reel diameter measuring device 1. This allows the operator to safely obtain the reel diameter information measured by the reel diameter measuring device 1 while away from the device.

[0017] Furthermore, the control device 20 may have an input unit 22 for inputting information necessary to operate the reel diameter measuring device 1. By enabling the operation of the reel diameter measuring device 1 by inputting information via the input unit 22, the operator can measure the reel diameter remotely, away from the reel diameter measuring device 1, making the work safer. The input unit 22 may also have a function to transmit information necessary for receiving reel diameter information by the receiving unit 21 to the reel diameter measuring device 1, and may also have a function to input information necessary for output by the output unit 23 described later.

[0018] The control device 20 may have an output unit 23 that outputs reel diameter information. For example, the output unit 23 can display the reel diameter information on a display unit such as a display, enabling remote control of the reel diameter information from a distance from the reel diameter measuring device 1, thereby achieving safer operation. The control device 20 can be, for example, a computer having a CPU (Central Processing Unit). As a management computer, the control device 20 may link with various factory data in the manufacturing of metal strips, and may be linked with process and equipment maintenance data, and create process programs based on that information.

[0019] <Reel diameter measuring device (outer diameter measuring device) 1> Figure 2 is a diagram illustrating the reel diameter measuring device (outer diameter measuring device) 1 of the present invention. As shown in Figure 2, the outer diameter measuring device 1 is an outer diameter measuring device that measures the outer diameter of a cross section perpendicular to the central axis direction of a cylindrical body A (in Figure 2, the cross section of the XZ plane perpendicular to the Y axis direction), and comprises a jig 2, a pair of guides 5 and 6 installed on the jig 2, whose distance from each other can be adjusted and which can grip the side surface of the cylindrical body A, an outer diameter measuring unit 7 that measures the outer diameter of the cylindrical body A gripped by the pair of guides 5 and 6 based on the distance between the pair of guides 5 and 6, and an output unit 8 that outputs outer diameter information of the outer diameter measured by the outer diameter measuring unit 7, wherein the pair of guides 5 and 6 have curved surfaces formed on the upper ends of the surfaces that face each other and support the cylindrical body A.

[0020] The outer diameter measuring device 1 of the present invention is a system for measuring the outer diameter of a cross section perpendicular to the central axis direction of a cylindrical body A, and is more preferably a reel diameter measuring device 1 for measuring the reel diameter of a mandrel used for dispensing or winding metal strips. In other words, the outer diameter measuring device 1 of the present invention is a reel diameter measuring device for measuring the reel diameter of a mandrel used for dispensing or winding a metal strip, and comprises a jig 2, a pair of guides 5 and 6 installed on the jig 2, whose distance from each other can be adjusted and which can grip the side surface of a mandrel A1 (particularly the reel portion (cylindrical portion) of the mandrel A1), a reel diameter measuring unit 7 that measures the reel diameter of the mandrel A1 gripped by the pair of guides 5 and 6 based on the distance between the pair of guides 5 and 6, and an output unit 8 that outputs reel diameter information of the reel diameter measured by the reel diameter measuring unit 7, wherein the pair of guides 5 and 6 face each other and have curved portions formed on the upper ends of the surfaces that support the mandrel A1. In the following description of the outer diameter measuring device 1, we will use the reel diameter measuring system 1 as an example.

[0021] (Jig 2) The jig 2 is not particularly limited as long as it is possible to install the guides 5 and 6, described later, on the jig 2. For example, it may have a lower jig 3 and an upper jig 4 set above the lower jig 3, with the guides 5 and 6 installed on the upper jig 4. The upper jig 4 and the lower jig 3 can be disassembled, and the burden on the worker can be reduced by disassembling and carrying the reel diameter measuring device 1 when transporting it.

[0022] The upper jig 4 can rotate on the lower jig 3 with the upward direction (Z-axis direction in Figure 2) as the axis of rotation. By rotating the upper jig 4, the central axis direction of the mandrel A1 (Y-axis direction in Figure 2) and the pressing direction of the mandrel A1 by the guides 5 and 6 that grip the mandrel A1 (X-axis direction in Figure 2) can be adjusted to be perpendicular. This allows for more accurate measurement of the reel diameter of the mandrel A1. For example, the upper jig 4 may have a shaft and the lower jig 3 may have a bush, so that parallelism between the mandrel A1 and the guides 5 and 6 can be ensured.

[0023] The lower jig 3 may be mounted on a trolley or the like. To enable mounting the lower jig 3 on a trolley, the lower jig 3 may be provided with fasteners at its lower end for fixing it to the trolley. By mounting the lower jig 3 on a trolley or the like, the reel diameter measuring device 1 can be easily moved.

[0024] (Guide 5, 6) Guides 5 and 6 are formed as a pair on the jig 2 so that their distance from each other can be freely adjusted, and so that they can grip the side surface of the mandrel A1 (especially the reel portion (cylindrical portion) of the mandrel A1). Guides 5 and 6 may each have leg portions 51 and 61 and support portions 52 and 62 formed on the leg portions 51 and 61 to support the mandrel A1. Guides 5 and 6 can adjust the distance between support sections 52 and 62 according to the reel diameter of mandrel A1. When measuring the reel diameter of mandrel A1, the reel diameter can be expanded or contracted, and the distance between support sections 52 and 62 can be adjusted according to this expansion and contraction. This allows for accurate, safe, and efficient measurement of the reel diameter of mandrel A1. The mechanism for adjusting the distance between guides 5 and 6 is not particularly limited, but guides 5 and 6 may each have springs 53 and 63 that can extend and retract in the direction in which guides 5 and 6 are movable (X-axis direction in Figure 2). Furthermore, guides 5 and 6 may each be installed at the bottom of the legs 51 and 61 and may have spacing adjustment parts 54 and 64 that allow for adjustment of the distance between the legs 51 and 61. The spacing adjustment section 54 may have, for example, a rail extending from leg 51 toward leg 61, and similarly, the spacing adjustment section 64 may have a rail extending from leg 61 toward leg 51, and the legs 51 and 61 can move along the rails in the X-axis direction. Specifically, the spacing adjustment sections 54 and 64 may be any member capable of adjusting the spacing between guides 5 and 6, such as an LM guide (registered trademark) or other linear guides.

[0025] Figure 3 is a diagram that provides a more detailed explanation of the structure of guides 5 and 6. Each of the support portions 52 and 62 of guides 5 and 6 has a flat portion (a mutually opposing surface that supports the mandrel A1) 52A, 62A that contacts the mandrel A1 when measuring the reel diameter of the mandrel A1, and a curved portion 52B, 62B formed at the upper end of the flat portions 52A, 62A (see Figures 3(a) and (b)). The flat sections 52A and 62A preferably have a length of 20% or more of the reel diameter when the mandrel A1 is fully expanded in the vertical direction (Z-axis direction in Figure 3) in order to ensure a contact area with the mandrel A1 and to enable stable measurement of the reel diameter.

[0026] In this invention, curved portions 52B and 62B are formed at the upper ends of the flat portions 52A and 62A (see Figures 3(a) and (b)). Therefore, when the mandrel A1 moves from above to below relative to the guides 5 and 6 and is positioned between the guides 5 and 6 for measuring the reel diameter, it is possible to prevent the mandrel A1 from getting caught on the guides 5 and 6 due to contact between the guides 5 and 6 and the mandrel A1. This prevents damage to the guides 5 and 6 and the mandrel A1, allowing for safe and efficient measurement of the reel diameter. Preferably, the radius of curvature of the curved portions 52B and 62B is 20% or more of the reel diameter when the mandrel A1 is at its widest.

[0027] (Reel diameter measuring section (outer diameter measuring section) 7) The reel diameter measuring unit 7 measures the reel diameter of the mandrel A1 held between the pair of guides 5 and 6, based on the distance between the guides 5 and 6. The reel diameter measuring unit 7 is not particularly limited as long as it can measure the reel diameter, i.e., the distance between the guides 5 and 6, but may have, for example, a dial gauge 71 (see Figure 2). The dial gauge 71 may be a commonly known dial gauge. In the reel diameter measuring unit 7, the guides 5 and 6 can follow the increase or decrease in the reel diameter of the mandrel A1 as the spacing adjustment units 54 and 64 and the springs 53 and 63 operate, and the value of the dial gauge 71 may change according to the tracking value of the guides 5 and 6. For dial gauge measurements, a load of approximately 0.4 kg may be required, but the necessary force may be applied via the springs 53 and 63 mentioned above.

[0028] (Output section 8) The output unit 8 outputs the reel diameter information of the reel diameter measured by the reel diameter measuring unit 7. Regarding the method of output, for example, the reel diameter information may be displayed on a display unit provided in the reel diameter measuring device 1, or the reel diameter information may be output to a receiving unit 21 of the control device 20 of the reel diameter measuring system 10, causing the control device 20 to output the reel diameter information.

[0029] <Method for measuring outer diameter (method for measuring reel diameter)> Next, the outer diameter measurement method (reel diameter measurement method) of the present invention will be described. In the outer diameter measurement method of the present invention, the outer diameter of the cross-section perpendicular to the central axis of the cylindrical body A is measured by the outer diameter measuring unit 7 while changing the distance between the pair of guides 5 and 6 of the outer diameter measuring device 1. Furthermore, in the outer diameter measurement method of the present invention, the outer diameter measurement unit 7 measures the outer diameter of the cross section perpendicular to the central axis direction of the cylindrical body A using the outer diameter measurement system 10 described above, while changing the distance between the pair of guides 5 and 6 of the outer diameter measuring device 1, and the receiving unit 21 of the control device 10 receives the outer diameter information output by the output unit 8 of the outer diameter measuring device 1.

[0030] The present invention relates to a method for measuring the outer diameter of a cylindrical body in a cross-section perpendicular to the central axis direction, and is particularly preferred to be a method for measuring the reel diameter of a mandrel used for dispensing or winding metal strips. In other words, the outer diameter measurement method of the present invention is preferably a method in which the reel diameter measurement unit 7 measures the reel diameter using the reel diameter measuring device 1 described above, while changing the distance between the pair of guides 5 and 6 of the reel diameter measuring device 1 in accordance with the expansion or contraction of the reel diameter of the mandrel A1. Furthermore, the present invention preferably provides a method for measuring the outer diameter using the reel diameter measuring system 10 described above, in which the reel diameter measuring unit 7 measures the reel diameter while changing the distance between a pair of guides 5 and 6 of the reel diameter measuring device 1 in accordance with the expansion or contraction of the reel diameter of the mandrel A1, and the receiving unit 21 of the control device 20 receives the reel diameter information output by the output unit 8 of the reel diameter measuring device 1. In the following explanation of the outer diameter measurement method, we will use the reel diameter measurement method as an example.

[0031] Figure 4 is a diagram illustrating a method for measuring the reel diameter of a mandrel A1, which is an example of a member having a cylindrical body A. First, as shown in Figures 4(a) and 4(b), mandrel A1 is installed between guides 5 and 6. By adjusting the axial position of mandrel A1 relative to guides 5 and 6 (see arrows in Figure 4(a) (positive and negative Y-axis directions)), the measurement position of the reel of mandrel A1 can be set. In this case, the reel diameter of mandrel A1 can be enlarged or reduced (see reference numerals X1 and X2 in Figure 4(b)). The spacing between guides 5 and 6 can be changed in accordance with the enlargement or reduction of the reel diameter of mandrel A1 (see reference numerals X3 and X4 in Figure 4(b)). Therefore, in this invention, the reel diameter of mandrel A1 can be measured accurately, safely, and efficiently.

[0032] Furthermore, when installing mandrel A1 between guides 5 and 6, curved portions 52B and 62B are formed at the upper ends of the flat portions 52A and 62A, which prevents mandrel A1 from getting caught on guides 5 and 6 due to contact between them. This prevents damage to guides 5 and 6 and mandrel A1, allowing for safe and efficient measurement of the reel diameter.

[0033] Figure 5 illustrates a mechanism for adjusting the inclination of guides 5 and 6 relative to mandrel A1 by rotating the upper jig 4 on the lower jig 3. As shown in Figure 5(a), in the present invention, the jig 2 may have a lower jig 3 and an upper jig 4. In this case, the upper jig 4 may have a structure that can be fitted into a projection 3A formed on the upper end of the lower jig 3, and it is preferable that it is rotatable on the lower jig 3 with the upward direction (Z-axis direction in Figure 5(a)) as the axis of rotation.

[0034] As shown in Figure 5(b), when measuring the reel diameter of mandrel A1 as described above, the direction of axis Y1 of guides 5 and 6 may be inclined with respect to the direction of axis Y2 of mandrel A1 when viewed in the Z-axis direction. If the reel diameter is measured in such an inclined state, it may not be possible to measure the reel diameter accurately. In this regard, the present invention allows the upper jig 4 to be rotated on the lower jig 3, so that the direction of the axis Y1' of the guides 5 and 6 and the direction of the axis Y2 of the mandrel A1 can be aligned in a view along the Z axis (see Figure 5(c)). That is, the axis Y2 of the mandrel A1 and the pressing direction of the mandrel A1 by the guides 5 and 6 that grip the side surface of the mandrel A1 (in the X axis direction in Figure 5) can be made perpendicular. This allows for more accurate measurement of the reel diameter of mandrel A1.

[0035] According to the present invention described above, the outer diameter of a cylindrical body, such as the reel diameter of a mandrel, can be measured safely, efficiently, and with high accuracy. According to the present invention, the guide has a mechanism that follows the expansion and contraction of the reel diameter, which can suppress variations in data due to the operator. Furthermore, according to the present invention, it is possible to prevent workers measuring the reel diameter from falling from a height or becoming entangled in a dispensing device or winding device that has a mandrel. Furthermore, a configuration in which the upper jig can be rotated relative to the lower jig can also be adopted. In this case, it becomes possible to ensure greater accuracy in the parallelism between the mandrel and the guide when measuring the reel diameter. From this perspective as well, it is possible to eliminate variations in data due to the operator. Thus, according to the present invention, the measurement accuracy of the reel diameter is improved and the measurement time is also shortened. Furthermore, in the present invention, a reel diameter measuring system having a reel diameter measuring device and a control device enables data transmission and reception via any wireless method such as Bluetooth® or Wi-Fi®, and wired data transmission and reception may also be performed. [Examples]

[0036] The following describes embodiments of the present invention. The reel diameters of mandrels for winding or dispensing devices having the dimensions shown in Table 1 were measured. Measurements were performed using a conventional micrometer and the reel diameter measuring device of the present invention (see Figure 2). For the mandrels, the reel diameter was enlarged or reduced, and this is indicated as "enlarged" or "reduced" in the table. Measurement values ​​obtained using a conventional micrometer are indicated as "conventional measurement values," while measurement values ​​obtained using the reel diameter measurement device of the present invention are indicated as "measurement values ​​of the present invention." The reel diameter was measured twice at each of the three locations (tip, center, and tail) of the mandrel reel (cylindrical body) (a total of 6 measurements). The value with the largest error among these measurements was used as the measured value shown in Table 1.

[0037] Regarding dimensional measurement errors, conventional measurement methods resulted in errors of 0.11 to 0.21%, but the present invention makes it possible to reduce errors to 0.10% or less. Furthermore, while conventional methods required 5 hours per device for measurement, the present invention makes it possible to measure each device in 1 hour, achieving a significant improvement in efficiency. Note that each device refers to one of the four devices in Table 1: the winding devices for line A (No. 1 and 2), the unwinding devices for line A (No. 3 and 4), the winding devices for line B (No. 5 and 6), and the unwinding devices for line B (No. 7 and 8). Furthermore, it was confirmed that using the reel diameter measuring device of the present invention prevents workers from falling from heights and eliminates the risk of entanglement in the winding and dispensing devices, thus ensuring safety.

[0038] [Table 1] [Explanation of Symbols]

[0039] 1. Reel diameter measuring device (outer diameter measuring device) 2. Jig 3 Lower jig 3A protrusion 4 Upper jig 5, 6 Guide 51, 61 Legs 52, 62 Support part 52A, 62A Flat section (opposing surfaces) 52B, 62B curved part 52C, 62C tip 53, 63 Spring 54, 64 Spacing adjustment section 7. Reel diameter measuring section (outer diameter measuring section) 71 Dial Gauge 8 Output section 10. Reel diameter measuring system (outer diameter measuring system) 20 Control device 21 Receiving unit 22 Input section 23 Output section A Cylinder A1 Mandrel

Claims

1. An outer diameter measuring device for measuring the outer diameter of a cylindrical body in a cross section perpendicular to the central axis, Jig and, A pair of guides are installed on the jig, their spacing from each other is adjustable, and they are capable of gripping the sides of the cylindrical body. An outer diameter measuring unit that measures the outer diameter of the cylindrical body held between the pair of guides based on the distance between the pair of guides, The system comprises an output unit that outputs outer diameter information of the outer diameter measured by the outer diameter measuring unit, An outer diameter measuring device in which the pair of guides face each other and have curved portions formed on the upper ends of the surfaces that support the cylindrical body.

2. The aforementioned jig, Lower jig and The lower jig is equipped with an upper jig which is installed above the lower jig and is rotatable with the upper direction as the axis of rotation of the rotation axis, The outer diameter measuring device according to claim 1, wherein the pair of guides are mounted on the upper jig.

3. A reel diameter measuring device for measuring the reel diameter of a mandrel used for dispensing or winding a metal strip, Jig and, A pair of guides are installed on the jig, their spacing from each other is adjustable, and they are capable of gripping the sides of the mandrel. A reel diameter measuring unit that measures the reel diameter of the mandrel held between the pair of guides based on the distance between the pair of guides, The system includes an output unit that outputs reel diameter information of the reel diameter measured by the reel diameter measuring unit, A reel diameter measuring device in which the pair of guides face each other and have curved portions formed on the upper ends of the surfaces that support the mandrel.

4. The aforementioned jig, Lower jig and The lower jig is equipped with an upper jig which is installed above the lower jig and is rotatable with the upper direction as the axis of rotation of the rotation axis, The reel diameter measuring device according to claim 3, wherein the pair of guides are mounted on the upper jig.

5. A reel diameter measuring device according to claim 3 or 4, A control device comprising a receiving unit that receives reel diameter information output by the output unit of the reel diameter measuring device, A reel diameter measuring system equipped with [specific feature].

6. Using the reel diameter measuring device described in claim 3 or 4, A method for measuring the reel diameter, comprising measuring the reel diameter using a reel diameter measuring unit while changing the distance between a pair of guides of the reel diameter measuring device in accordance with the expansion or contraction of the reel diameter of the mandrel.

7. Using the reel diameter measuring system described in claim 5, The reel diameter is measured by the reel diameter measuring unit while changing the distance between a pair of guides in the reel diameter measuring device in accordance with the expansion or contraction of the reel diameter of the mandrel. A method for measuring the diameter of a reel, comprising: a receiving unit of the control device receiving reel diameter information output by an output unit of the reel diameter measuring device.

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