Sensor Roller Unit

Abstract

To provide a sensor roller unit capable of reducing an outer diameter of a sensor roller as compared with before.SOLUTION: A sensor roller unit 1 includes a sensor roller 101 and an outer journal 103. The sensor roller 101 includes: a rotary center shaft CL; and a sensor storage portion P that is formed so as to extend axially in the outside in a radial direction relative to the rotary center shaft CL and can store a sensor 110 and a cable K. An outer journal 103 has a hollow portion Q that is connected to the sensor storage portion P along the axial direction and receives the cable K and is connected to the sensor roller 101 along the axial direction.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a sensor roller unit. [Background technology]

[0002] Conventionally, sensor roller units that measure the shape of a rolled material rolled by a rolling mill have been known. Patent Document 1 discloses a shape sensor roll, as such a sensor roller unit, arranged on the entry or exit side of a rolling line. The shape sensor roll has a core shaft with a hollow portion and multiple sensors arranged along the axial direction, and the shape sensor roll is configured by fitting a thin sleeve around the outer periphery of the core shaft. The sensor cables are drawn out to the outside of the shape sensor roll through the hollow interior of the core shaft located radially inward. When such a shape sensor roll receives a load from the rolled material while rotating, the shape of the rolled material is calculated based on the results of detecting the load. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 8-184429 Summary of the Invention [Problem to be solved by the invention]

[0004] In the technology described in Patent Document 1, the sensor cable is structured to be drawn out to the outside via the hollow interior of the core shaft, so a hollow core shaft is essential inside the sensor roller.

[0005] SUMMARY OF THE INVENTION An object of the present invention is to provide a sensor roller unit that allows the outer diameter of the sensor roller to be smaller than conventional sensor rollers. [Means for solving the problem]

[0006] The present invention provides a sensor roller unit comprising: a sensor roller having a central rotation axis and a sensor accommodating portion formed to extend axially radially outward of the central rotation axis and capable of accommodating a sensor and a cable; and a journal coupled to the sensor roller along the axial direction, the journal having a hollow portion that communicates with the sensor accommodating portion along the axial direction and that receives the cable.

[0007] According to this configuration, the hollow portion of the journal is connected to the sensor accommodating portion along the axial direction, so there is no need to provide a hollow portion inside the sensor roller for passing a cable, making it possible to reduce the diameter of the sensor roller.

[0008] In the above configuration, it is desirable that, in a cross section perpendicular to the axial direction, the maximum distance from the rotational axis to the inner surface of the hollow portion of the journal is set to be greater than the minimum distance from the rotational axis to the sensor accommodating portion.

[0009] This configuration allows the cable to be easily drawn from the sensor housing into the hollow portion. Furthermore, even if multiple sensors are arranged at intervals around the circumference of the sensor roller in a cross section perpendicular to the axial direction, the hollow portion can receive the cable from each sensor.

[0010] In the above configuration, the hollow portion of the journal may have a circular shape in a cross section perpendicular to the axial direction.

[0011] This configuration makes it possible to easily pull out the cable from the sensor accommodating portion into the hollow portion regardless of the position of the sensor accommodating portion in the circumferential direction of the sensor roller in a cross section perpendicular to the rotation axis. Also, even if multiple sensors are arranged at intervals in the circumferential direction of the sensor roller in a cross section perpendicular to the axial direction, the hollow portion can receive the cable from each sensor.

[0012] In the above configuration, the hollow portion of the journal may include a cylindrical shape centered on the central axis of rotation.

[0013] According to this configuration, it is possible to easily pull out the cable from the sensor accommodating portion into the hollow portion, regardless of the position of the sensor accommodating portion in the circumferential direction of the sensor roller in a cross section perpendicular to the rotation axis.

[0014] In the above configuration, the sensor housing portion may have a cylindrical shape having a center extending in the axial direction.

[0015] According to this configuration, it is possible to easily form the sensor containing portion within the sensor roller, compared to when the sensor containing portion has a rectangular cross section.

[0016] The above configuration may further include a cable collection section that is positioned outside the journal in the axial direction as viewed from the sensor roller, receives the cable from the hollow section, and collects the cable.

[0017] According to this configuration, there is no need to provide a cable collection section inside the journal, which allows the diameter of the journal to be reduced, and the bearing section on which the journal is journaled can be made smaller.

[0018] In the above configuration, the hollow portion of the journal may have a tapered portion that is inclined so as to widen toward the sensor accommodating portion.

[0019] This configuration makes it easy to arrange the cable from the sensor housing portion to the hollow portion, and also makes it possible to further reduce the diameter of the sensor roller. [Effects of the Invention]

[0020] According to the present invention, it is possible to provide a sensor roller unit in which the outer diameter of the sensor roller can be made smaller than before. [Brief explanation of the drawings]

[0021] [Figure 1]1 is a schematic diagram showing a state in which a sensor roller unit according to an embodiment of the present invention is arranged on the delivery side of a rolling mill. [Figure 2] FIG. 2 is a side cross-sectional view of a sensor roller unit according to an embodiment of the present invention. [Figure 3] FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. [Figure 4] FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 2. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, a sensor roller unit 1 according to one embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a schematic diagram showing a state in which a sensor roller unit 1 according to one embodiment of the present invention is arranged on the exit side of a rolling mill 50.

[0023] As shown in FIG. 1, the sensor roller unit 1 is used to measure the flatness (shape) of a rolled material S sent out from, for example, a rolling section 51 of a rolling mill 50. The sensor roller unit 1 measures the load (tension) received from the rolled material S and outputs a signal corresponding to the measured load. A computing device (not shown) receives the signal and evaluates the balance of the load (tension distribution), thereby calculating the flatness of the rolled material S. Note that the sensor roller unit 1 may also be used to measure the shape of other objects to be measured.

[0024] Fig. 2 is a side cross-sectional view of the sensor roller unit 1 according to this embodiment. For ease of explanation, the right side of Fig. 2 may be referred to as the axial outer side (non-driving side), and the left side of Fig. 2 may be referred to as the axial inner side (driving side). Fig. 3 is a cross-sectional view taken along the line III-III in Fig. 2. Fig. 4 is a cross-sectional view taken along the line IV-IV in Fig. 2.

[0025] The sensor roller unit 1 has a rotating body 10. The rotating body 10 is supported by an inner bearing portion 21 and an outer bearing portion 22 so as to be rotatable around a rotation center axis CL.

[0026] The rotating body 10 includes a sensor roller 101, an inner journal 102, an outer journal 103 (journal), a cable collection section 104A, a signal processing section 105, and a drive input section .

[0027] The sensor roller 101 houses multiple sensors 110 and is a component that comes into contact with a measurement target, such as a rolled material. The sensor roller 101 has a cylindrical shape with the central axis of rotation CL. The sensor roller 101 has multiple sensor housings P formed to extend in the axial direction radially outward from the central axis of rotation CL. The multiple sensor housings P are spaced apart along the circumferential direction; in this embodiment, for example, three sensor housings P are arranged at equal intervals of 120 degrees. Each sensor housing P has a cylindrical shape with a center extending in the axial direction and can house a sensor 110 and a cable K drawn out from the sensor 110. A load sensor or the like can be used as the sensor 110.

[0028] In this embodiment, as an example, two sensors 110 are fixed to the inner circumferential surface of one sensor housing portion P so as to be spaced apart in the axial direction. Each sensor housing portion P is exposed at both ends of the sensor roller 101 in the axial direction. In other words, each sensor housing portion P is formed so as to penetrate the sensor roller 101 in the axial direction. The sensor housing portion P may be exposed on only one side of the sensor roller 101 in the axial direction.

[0029] 3, the plurality of sensor containing portions P formed in the sensor roller 101 have a diameter r that is smaller than the diameter R of the sensor roller 101. In addition, a thin portion having a thickness t is formed between the inner peripheral surface of the sensor containing portion P and the outer peripheral surface of the sensor roller 101.

[0030] The inner journal 102 is a portion of the rotating body 10 that is journaled by the inner bearing portion 21. The inner journal 102 is disposed axially inside the sensor roller 101, and is connected to the sensor roller 101 along the axial direction by a plurality of bolts. The inner journal 102 also seals the inner ends of the sensor housing portions P of the sensor roller 101. The inner journal 102 rotates integrally with the sensor roller 101. In this embodiment, a middle portion of the inner journal 102 is journaled by the inner bearing portion 21. A large diameter portion of the inner journal 102 is fixed to the sensor roller 101. The shape of the inner journal 102 is not limited to these.

[0031] The outer journal 103 is a portion of the rotating body 10 that is journaled by the outer bearing portion 22. The outer journal 103 is disposed on the axial outer side of the sensor roller 101 (opposite the inner journal 102) and is connected to the sensor roller 101 along the axial direction by a plurality of bolts. The outer journal 103 rotates integrally with the sensor roller 101. In this embodiment, a small diameter portion of the outer journal 103 is journaled by the outer bearing portion 22. A large diameter portion of the outer journal 103 is fixed to the sensor roller 101. The small diameter portion of the outer journal 103 protrudes outward in the axial direction beyond the outer bearing portion 22 and is connected to the cable collection portion 104A. The shape of the outer journal 103 is not limited to these.

[0032] Furthermore, a hollow portion Q is formed in the outer journal 103. The hollow portion Q is connected to each of the plurality of sensor accommodating portions P in the sensor roller 101 along the axial direction and receives the cable K of each sensor 110. In this embodiment, as shown in FIG. 2, the cable K drawn out from the sensor 110 extends outward in the axial direction (toward the opposite driving side).

[0033] The hollow portion Q has a cylindrical shape centered on the central axis of rotation CL. The hollow portion Q has a taper 103A (tapered portion) that is inclined so as to widen toward the sensor accommodating portion P. As shown in Fig. 2, the taper 103A is formed in the inner portion of the hollow portion Q in the axial direction, and the outer portion of the hollow portion Q in the axial direction (the portion journaled by the outer bearing portion 22) has a portion with a constant inner diameter.

[0034] 4, the hollow portion Q of the outer journal 103 is connected to the radially inner portions of the three sensor accommodating portions P of the sensor roller 101. In other words, the arrangement of FIG. 4, when viewed in a cross section perpendicular to the axial direction, the radius (maximum distance) from the rotation center axis CL to the inner surface of the hollow portion Q is set to be larger than the minimum distance from the rotation center axis CL to the sensor accommodating portion P.

[0035] The cable collection section 104A receives the cables K from the hollow section Q and collects the cables K. The cable collection section 104A is disposed outside the outer journal 103 in the axial direction as viewed from the sensor roller 101, and is connected to the outer journal 103 via a cable collection section outer cylinder 104 by a plurality of bolts or the like. The cable collection section outer cylinder 104 has a cylindrical shape and has a cable connection section (not shown) therein. The cable connection section communicates with the hollow section Q of the outer journal 103 along the axial direction. The cable collection section 104A also has the function of collecting the cables K of the multiple sensors 110. Note that in FIG. 2, the cables K arranged inside the cable collection section 104A are not shown.

[0036] A rotating unit 24 of the signal processing unit 105 is disposed inside the signal processing unit 105, and the rotating unit 24 receives detection results (signals) from the multiple sensors 110 outside the rotating body 10. The signal processing unit 105 is connected to the cable collecting unit 104A and receives multiple cables K. The signal processing unit 105 has a transmitting unit (not shown) connected to each cable K of the sensor 110.

[0037] The fixed part 25 of the signal processing unit 105 is arranged outside the signal processing unit 105, and the fixed part 25 receives signals sent from the rotating part 24 of the signal processing unit 105 in a contact or non-contact manner and inputs them to the above-mentioned calculation device. As a result, the calculation device obtains information corresponding to the magnitude of the load received by each sensor 110. Note that the fixed part 25, like the inner bearing part 21 and the outer bearing part 22, is fixed to the installation location of the rolling mill 50 without rotating, and is connected to the outer end of the rotating body 10. The device constituted by the sensor roller unit 1, the inner bearing part 21, the outer bearing part 22 and the fixed part 25 is referred to as a sensor roller device.

[0038] The drive input unit 106 receives a drive force from a motor (not shown). Upon receiving the drive force, the rotating body 10 rotates around the central axis of rotation CL.

[0039] The sensor roller 101, the inner journal 102, the outer journal 103, the cable collection section 104A, and the signal processing section 105 rotate together around the rotation center axis CL.

[0040] As described above, in this embodiment, the hollow portion Q of the outer journal 103 is axially connected to the sensor housing portion P, eliminating the need to form an axially extending hollow portion radially inward from the sensor housing portion P within the sensor roller 101. As a result, the sensor roller 101 can be made smaller, for example, to an outer diameter of 200 mm or less. Furthermore, as shown in FIG. 3, the region of the sensor roller 101 radially inward from the sensor housing portion P can be used as a solid portion to increase the rigidity of the sensor roller 101. As shown in FIG. 3, by reducing the thickness t of the thin-walled portion outside the sensor housing portion P, the sensor 110 (FIG. 2) can detect the load (tension) received from a measurement object such as a rolled material with high accuracy. In particular, even when the load is small, the sensor 110 is positioned relatively close to the rolled material, allowing for accurate detection of fluctuations in the load.

[0041] Furthermore, in the sensor roller unit 1 according to this embodiment, the axial length of the sensor roller 101 can be shortened, so that the shape (flatness) of a rolled material having a small width, for example, of 300 mm or less, can be detected with high accuracy. Furthermore, by reducing the diameter and length of the sensor roller 101, it is also possible to reduce the cost of the sensor roller unit 1.

[0042] As described above, when viewed along the axial direction, the radius (maximum distance) from the rotation center axis CL to the inner surface of the hollow portion Q is set to be larger than the minimum distance from the rotation center axis CL to the sensor accommodating portion P (FIG. 4). This makes it possible to easily pull out the cable K from the sensor accommodating portion P into the hollow portion Q (cable pull-in effect). Furthermore, even if multiple sensors 110 are arranged at intervals around the circumference of the sensor roller 101 in a cross section perpendicular to the axial direction, the hollow portion Q can receive the cable K from each sensor 110.

[0043] In particular, in this embodiment, the hollow portion Q has a circular shape in a cross section perpendicular to the axial direction. With this configuration, as shown in Fig. 4, the hollow portion Q is open over the entire circumferential direction so as to be able to receive the cable K, so that the cable can be easily drawn from the sensor accommodating portion P to the hollow portion Q regardless of the position of the sensor accommodating portion P in the circumferential direction of the sensor roller 101 in the cross section perpendicular to the rotation axis.

[0044] In this embodiment, the hollow portion Q of the outer journal 103 includes a cylindrical shape centered on the central axis of rotation CL. Even with this configuration, the cable K can be easily drawn from the sensor accommodating portion P to the hollow portion Q, regardless of the position of the sensor accommodating portion P in the circumferential direction of the sensor roller 101 in a cross section perpendicular to the rotation axis.

[0045] In addition, in this embodiment, each sensor accommodating section P has a cylindrical shape with a center extending in the axial direction, making it easier to form the sensor accommodating section P within the sensor roller 101 compared to when the sensor accommodating section P has a rectangular cross-sectional shape.

[0046] In this embodiment, multiple sensor housings P are arranged at intervals in the circumferential direction, and the hollow portion Q communicates with the multiple sensor housings P along the axial direction (FIG. 3). As a result, by arranging sensors 110 in multiple sensor housings P, the detection accuracy of the sensors 110 can be improved. In addition, the hollow portion Q can stably accommodate the cables K of the multiple sensors.

[0047] Furthermore, the hollow portion Q of the outer journal 103 has a taper 103A that is inclined so as to widen toward the sensor accommodating portion P. This configuration makes it easy to arrange the cable K from the sensor accommodating portion P to the hollow portion Q, and also enables the diameter of the sensor roller 101 to be further reduced.

[0048] Furthermore, in this embodiment, the cable collection section 104A is disposed outside the outer journal 103 in the axial direction as viewed from the sensor roller 101, and has the function of receiving the cable K from the hollow section Q and collecting the cable K. With this configuration, there is no need to provide the cable collection section 104A inside the outer journal 103, and it is possible to reduce the diameter of the outer journal 103, and it is also possible to reduce the size of the bearing section on which the outer journal 103 is journaled.

[0049] The sensor roller unit 1 according to one embodiment of the present invention has been described above. However, the present invention is not limited to these embodiments. The sensor roller unit according to the present invention can be embodied in the following modified forms.

[0050] (1) In the above embodiment, the rotating body 10 of the sensor roller unit 1 is described as having a cable collection section 104A, but the rotating body 10 may not have a cable collection section 104A, and each cable K may be directly passed from the outer journal 103 to the signal processing section 105.

[0051] (2) Furthermore, the cross-sectional shape of the sensor accommodating portion P formed in the sensor roller 101 is not limited to a circle, and may be other shapes such as a rectangle. Similarly, the cross-sectional shape of the hollow portion Q formed in the outer journal 103 is not limited to a circle. Furthermore, the outer journal 103 may not have the taper 103A. [Explanation of symbols]

[0052] 1 Sensor roller unit 10 Rotating Body 101 Sensor Roller 102 Inner Journal 103 Outer Journal 103A Tapered 104 Cable collection section outer tube 104A Cable Collection Section 105 Signal Processing Unit 106 Drive input section 110 Sensors 21 Inner bearing part 22 Outer bearing part 24 Rotating part of signal processing unit 25 Fixed part of signal processing unit 50 Rolling Mill 51 Rolling Section CL central axis of rotation K Cable P sensor housing Q Hollow part S rolled material

Claims

1. a sensor roller having a rotation center axis and a sensor accommodating portion formed so as to extend in an axial direction radially outward of the rotation center axis and capable of accommodating a sensor and a cable; a journal having a hollow portion that communicates with the sensor accommodating portion along the axial direction and receives the cable, the journal being connected to the sensor roller along the axial direction; Equipped with A sensor roller unit, wherein in a cross section perpendicular to the axial direction, the maximum distance from the rotational axis to the inner surface of the hollow portion of the journal is set to be greater than the minimum distance from the rotational axis to the sensor accommodating portion.

2. A sensor roller having a rotation center axis and a sensor accommodating portion formed to extend axially radially outward of the rotation center axis and capable of accommodating a sensor and a cable; a journal having a hollow portion that communicates with the sensor accommodating portion along the axial direction and receives the cable, the journal being connected to the sensor roller along the axial direction; Equipped with The hollow portion of the journal has a tapered portion that is inclined so as to widen toward the sensor accommodating portion.

3. 3. The sensor roller unit according to claim 1, wherein the hollow portion of the journal has a circular shape in a cross section perpendicular to the axial direction.

4. The sensor roller unit according to claim 3 , wherein the hollow portion of the journal includes a cylindrical shape centered on the central axis of rotation.

5. 3. The sensor roller unit according to claim 1, wherein the sensor housing portion has a cylindrical shape having a center extending in the axial direction.

6. the sensor roller is disposed on the outer side of the journal in the axial direction, as viewed from the sensor roller; The sensor roller unit according to claim 1 or 2, further comprising a cable collection section that receives the cable from the hollow section and collects the cable.

7. A sensor roller unit as described in Claim 2, wherein, in a cross section perpendicular to the axial direction, the maximum distance from the rotation center axis to the inner surface of the hollow portion of the journal is set to be greater than the minimum distance from the rotation center axis to the sensor accommodating portion.

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