Position adjustment mechanism, jig, and position adjustment method

Abstract

This technology provides the ability to adjust the tilt while suppressing changes in height. [Solution] The position adjustment mechanism according to this disclosure comprises a plate, a fastening screw, and four tilt adjustment screws. The fastening screw fastens the plate to a reel capable of winding magnetic tape, and the four tilt adjustment screws are arranged at 90-degree intervals around the rotation axis of the reel on a circle around the rotation axis of the reel, and the tilt of the reel is adjusted by the movement of the four tilt adjustment screws relative to the plate.

Description

Technical Field

[0001] The present disclosure relates to a position adjustment mechanism, a jig, and a position adjustment method.

Background Art

[0002] Patent Document 1 discloses a component position adjustment device. The magnetic tape recording and reproducing device includes a base and a reel. The reel is provided on the base. The component position adjustment device adjusts the inclination of the reel in the X-Y direction and the height in the Z direction by rotating an adjustment screw.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The inventors of the present application have discovered the following problems. In such a component position adjustment device, even when trying to adjust only the inclination of the reel, the height may change.

[0005] The present disclosure has been made in view of the above-described problems, and provides a technique capable of adjusting the inclination while suppressing a change in the height of the reel.

Means for Solving the Problems

[0006] The position adjustment mechanism according to the present disclosure includes a plate, a fastening screw, and four inclination adjustment screws. The fastening screw fastens the plate and a reel capable of winding a magnetic tape. The four tilt adjustment screws are arranged at 90-degree intervals around the rotation axis of the reel on a circle around the rotation axis of the reel. The tilt of the reel is adjusted by the movement of the four tilt adjustment screws relative to the plate.

[0007] The fixture relating to this disclosure is Used in position adjustment mechanisms, The position adjustment mechanism comprises a plate, fastening screws, and four tilt adjustment screws. The fastening screws fasten the plate and the reel capable of winding the magnetic tape. The four tilt adjustment screws are arranged at 90-degree intervals around the rotation axis of the reel on a circle around the rotation axis of the reel. The aforementioned jig is First and second gears, A first and second driver bit, The first and second gears mesh with each other, The first and second driver bits each extend along the pivot axes of the first and second gears and engage with the two tilt adjustment screws that sandwich the rotation axis of the reel. When the first gear rotates, the first driver bit rotates, and the second driver bit rotates via the second gear in the opposite direction to the rotation of the first driver bit. The amount of rotation of the first driver bit and the amount of rotation of the second driver bit are the same.

[0008] The fixture relating to this disclosure is Used in position adjustment mechanisms, The position adjustment mechanism comprises a plate, fastening screws, four tilt adjustment screws, and four eccentricity adjustment screws. The fastening screws fasten the plate and the reel capable of winding the magnetic tape. The four tilt adjustment screws are arranged at 90-degree intervals around the rotation axis of the reel on a circle around the rotation axis of the reel. The reel and the plate receive rotational driving force from the motor via the motor shaft and rotate around the rotation axis. The four eccentricity adjustment screws are arranged at 90-degree intervals with respect to the rotation axis of the plate on a circle around the rotation axis of the plate. The tip of the motor shaft and the tips of the four eccentricity adjustment screws each have a taper. The tips of the four eccentricity adjustment screws and the tip of the motor shaft come into contact, The aforementioned jig is First and second gears, A first and second driver bit, The first and second gears mesh with each other, The first and second driver bits each extend along the pivot axes of the first and second gears and engage with the two eccentricity adjustment screws that sandwich the rotation axis of the plate. When the first gear rotates, the first driver bit rotates, and the second driver bit rotates via the second gear in the opposite direction to the rotation of the first driver bit. The amount of rotation of the first driver bit and the amount of rotation of the second driver bit are the same.

[0009] The position adjustment method for the position adjustment mechanism relating to this disclosure is: The position adjustment mechanism comprises a plate, fastening screws, and four tilt adjustment screws. The fastening screws fasten the plate and the reel capable of winding the magnetic tape. The four tilt adjustment screws are arranged at 90-degree intervals around the rotation axis of the reel on a circle around the rotation axis of the reel. The tilt of the reel is adjusted by moving the four tilt adjustment screws to the plate. [Effects of the Invention]

[0010] According to this disclosure, the tilt can be adjusted while suppressing changes in height.

Brief Description of the Drawings

[0011] [Figure 1] It is an exploded perspective view showing a configuration example of the position adjustment mechanism according to the present disclosure. [Figure 2] It is a partial cross-sectional view showing a configuration example of the position adjustment mechanism according to the present disclosure. [Figure 3] It is a partial cross-sectional view showing a main part of a configuration example of the position adjustment mechanism according to the present disclosure. [Figure 4] It is a perspective view showing a motor shaft according to the present disclosure and its surroundings. [Figure 5] It is a schematic diagram showing the eccentric adjustment of the position adjustment mechanism according to the present disclosure. [Figure 6] It is a graph showing measured values with respect to phase. [Figure 7] It is a cross-sectional view showing another configuration example of the position adjustment mechanism according to the present disclosure. [Figure 8] It is a perspective view showing a motor shaft according to the present disclosure and its surroundings. [Figure 9] It is a perspective view showing a configuration example of a jig according to the present disclosure. [Figure 10] It is a perspective view showing a usage method of a configuration example of a jig according to the present disclosure. [Figure 11] It is a perspective view showing a usage method of another configuration example of a jig according to the present disclosure. [Figure 12] It is a schematic diagram showing a cross-section of a magnetic tape device according to related art.

Modes for Carrying Out the Invention

[0012] (Related Art) Prior to the specific embodiments to which the present disclosure is applied, referring to FIG. 12, a magnetic tape device according to the related art of the present disclosure will be described. FIG. 12 is a schematic diagram showing a cross-section of a magnetic tape device according to the related art.

[0013] In the magnetic tape device 100 shown in Figure 12, a cartridge 102 is inserted through the cartridge insertion slot 101. A cartridge reel 106 is provided inside the cartridge 102. Then, the cartridge transport mechanism 104 transports the cartridge 102. The cartridge reel 106 is attached to the motor 108. The tape pulling mechanism 105 then removes the tape 109 from the cartridge 102. The magnetic tape device reel 107 is equipped with a flange 111 for guiding the height at which the tape 109 travels.

[0014] It is desirable to align the position of flange 111 and flange 112 of the cartridge reel 106 in the height direction (in this case, the Z-axis direction) at the micron level. Therefore, when attaching the cartridge reel 106 to the motor 108, the height from the reference surface of the magnetic tape device 100 is measured, and the height is adjusted by inserting a spacer (not shown) with a thickness of several micrometers according to that height. When adjusting the tilt of the cartridge reel 106, it is desirable to adjust the tilt without changing the height. A known method for adjusting the tilt is to support the object to be adjusted at three points and adjust the height of those three points. In this tilt adjustment method, the height is the average value of the three points, and if one of the three points is the average value, the tilt can be adjusted without changing the height by adjusting the other two points to the height of that point. However, the average value of the three points is almost never the same as any of the three points. Therefore, it is difficult to adjust the tilt without changing the height using the method of adjusting the tilt at three points.

[0015] Furthermore, a known eccentricity adjustment mechanism is one provided in the coupling connecting the drive shaft and the passive shaft. In the magnetic tape device 100, the tape reeling mechanism 105 is located above the reel 107 inside the magnetic tape device, which limits the height of the magnetic tape device 100. Due to these limitations, it is difficult to provide such an eccentricity adjustment mechanism between the motor 108 and the reel 107 inside the magnetic tape device. Moreover, even if the tape reeling mechanism 105 were miniaturized and such an eccentricity adjustment mechanism were provided, the distance between the motor 108 and the reel 107 inside the magnetic tape device would increase, potentially affecting rotational runout. Therefore, the application of such an eccentricity adjustment mechanism is difficult. Furthermore, even if the coupling is miniaturized, the space between the motor 108 and the reel 107 inside the magnetic tape device is narrow, making it difficult to adjust by inserting a tool from the side (in this case, a direction included in the XY plane).

[0016] Specific embodiments of the present invention will be described in detail below with reference to the drawings. However, the present invention is not limited to the following embodiments. Also, for clarity of explanation, the following description and drawings have been simplified as appropriate.

[0017] <Embodiment 1> (One example configuration) An example configuration of the position adjustment mechanism according to Embodiment 1 will be described with reference to Figures 1 to 6.

[0018] It should be noted that the right-handed XYZ coordinate system shown in Figure 1 and other drawings is merely for convenience in explaining the positional relationships of the components. Typically, the positive Z-axis direction is vertically upward, and the XY plane is the horizontal plane, and this is consistent across drawings.

[0019] As shown in Figure 1, the position adjustment mechanism 200 is assembled to the reel 201 and motor 203 of the magnetic tape device. The reel 201 comprises a hub 201A and a flange 201B. The hub 201A has a cylindrical surface 201AA with a notch 201AB. The cylindrical surface 201AA may have any shape that allows it to wind up a magnetic tape (not shown). The flange 201B protrudes from the outer edge of the cylindrical surface 201AA.

[0020] The position adjustment mechanism 200 comprises a plate 202, a fastening screw 204, and four tilt adjustment screws 205.

[0021] The plate 202 is fastened to the motor shaft 208 of the motor 203 via fixing screws 207.

[0022] Fastening screws 204 fasten the plate 202 to the reel 201. In other words, the reel 201 is fastened to the plate 202 via the fastening screws 204. The reel 201 can wind up a magnetic tape (not shown). The fastening screws 204 should tighten the reel 201 to the plate 202 so that the reel 201 can move in the height direction relative to the plate 202 when the reel 201 is subjected to a force in the height direction (here, the Z-axis direction). The fastening screws 204 should be washer-head screws, i.e., screws with washers in their heads. The position adjustment mechanism 200 may further include four fastening screws 204. The four fastening screws 204 should each be positioned between four tilt adjustment screws 205 and the rotation axis Z1 of the reel 201.

[0023] The four tilt adjustment screws 205 are positioned at 90-degree intervals around the rotation axis Z1 of the reel 201 on a circle around the rotation axis Z1 of the reel 201. In other words, the four tilt adjustment screws 205 are positioned on the reel 201 on a crosshair centered on the rotation axis Z1 of the reel 201. The four tilt adjustment screws are preferably positioned inside the hub 201A of the reel 201. The four tilt adjustment screws 205 protrude from the bottom surface 201C of the reel 201 toward the plate 202. The tilt of the reel 201 is adjusted by the movement of the four tilt adjustment screws 205 relative to the plate 202. Therefore, since the four tilt adjustment screws 205 are positioned on the reel 201 on a crosshair centered on the rotation axis Z1 of the reel 201, the tilt of the reel 201 can be adjusted while suppressing changes in the height of the reel 201.

[0024] Furthermore, the position adjustment mechanism 200 may be further equipped with three eccentricity adjustment screws 206. The reel 201 and plate 202 receive rotational driving force from the motor 203 via the motor shaft 208 and rotate around the rotation axis Z1. The three eccentricity adjustment screws 206 are arranged at 120-degree intervals around the rotation axis Z1 on a circle on the plate 202 around the rotation axis Z1. The three eccentricity adjustment screws 206 are connected from above the reel 201 by inserting, for example, a screwdriver bit (not shown). The three eccentricity adjustment screws 206 can rotate by receiving rotational driving force from the screwdriver bit. The tip of the motor shaft 208 on the plate 202 side has a taper 212 as shown in Figures 4 and 5. The tips of the three eccentricity adjustment screws 206 on the motor shaft 208 side have a taper 211 as shown in Figure 5. The tips of the three eccentricity adjustment screws 206 and the tip of the motor shaft 208 come into contact. Therefore, the three eccentricity adjustment screws 206 can rotate by receiving rotational driving force from a screwdriver bit from above the reel 201. The movement of the three eccentricity adjustment screws 206 relative to the motor shaft 208 adjusts the positions of the reel 201 and the plate 202. In other words, the eccentricity of the reel 201 can be adjusted.

[0025] Next, with reference to Figure 2, the tilt adjustment operation of the position adjustment mechanism 200 will be described.

[0026] Prior to the tilt adjustment operation, the laser displacement meter 209 is positioned outside the cylindrical surface 201AA of the hub 201A of the reel 201, on a straight line connecting the tilt adjustment screws 205a and 205c. The laser displacement meter 209 can measure the displacement of the cylindrical surface 201AA on a straight line connecting the rotation axis Z1 and the laser displacement meter 209. Similarly, the laser displacement meter 210 is positioned outside the cylindrical surface 201AA, on a straight line connecting the tilt adjustment screws 205b and 205d. The laser displacement meters 209 and 210 are preferably external components. The laser displacement meter 210 can measure the displacement of the cylindrical surface 201AA on a straight line connecting the rotation axis Z1 and the laser displacement meter 210.

[0027] First, three of the four tilt adjustment screws 205a to 205d are arbitrarily selected and made to protrude from the reel 201 by the design value of the distance from the bottom surface 201C of the reel 201 to the top surface 202A of the plate 202. The three arbitrarily selected screws protrude more than the remaining screw. The fastening screw 204 fastens the plate 202 and the reel 201, determining the position of the reel 201. The remaining screw is then loosely tightened with a low torque so that its tip touches the plate 202. As a result, all four tilt adjustment screws 205a to 205d come into contact with the plate 202. This ensures that the reel 201 is always subjected to force toward the plate 202. Furthermore, by moving the four tilt adjustment screws 205a to 205d in the height direction (in this case, the Z direction), the reel 201 can move in the height direction relative to the plate 202 in accordance with the movement of the four tilt adjustment screws 205a to 205d. In other words, the tilt can be adjusted.

[0028] The measurement positions at the bottom and top of the cylindrical surface 201AA are predetermined. The laser displacement meter 209 measures the lower measurement position and obtains the displacement measurement value XL at the bottom. The laser displacement meter 209 measures the upper measurement position and obtains the displacement measurement value XU at the top. The inclination measurement value X1 is obtained by subtracting the lower displacement measurement value XU from the upper displacement measurement value XU. The relationship between the inclination IN of the cylindrical surface 201AA, the inclination measurement value X1, and the distance H1 between the lower and upper measurement positions of the cylindrical surface 201AA can be shown using the following equation (1). IN = X1 / H1 …(1)

[0029] The relationship between the adjustment amount A1 of the tilt adjustment screws 205a and 205c and the distance L1 between the tilt adjustment screws 205a and 205c can be shown using the following equation (2). A1 = (L1 * X1 / H1) / 2 …(2)

[0030] Here, the positive direction of the displacement measurement value measured by the laser displacement meter 209 is the direction away from the laser displacement meter 209, that is, the direction toward the inside of the cylindrical surface 201AA. When the tilt measurement value X1 of the displacement measurement value of the cylindrical surface 201AA is a positive value, the top of the cylindrical surface 201AA tilts toward the inside of the cylindrical surface 201AA. In such a case, the tilt of the reel 201 is adjusted by loosening the tilt adjustment screw 205a and tightening the tilt adjustment screw 205c. Specifically, the amount of protrusion of the tilt adjustment screw 205c from the reel 201 is increased by tightening the tilt adjustment screw 205c. Also, the amount of protrusion of the tilt adjustment screw 205a from the bottom surface 201C of the reel 201 is decreased by loosening the tilt adjustment screw 205a. Furthermore, this causes the upper part of the cylindrical surface 201AA to tilt outward, and the tilt measurement X1 of the displacement measurement of the cylindrical surface 201AA approaches 0 (zero) from a positive value. In other words, it adjusts the tilt of the reel 201.

[0031] The tilt adjustment screws 205a to 205d are set to a screw pitch P1. The rotational speed R1 of the tilt adjustment screws 205a to 205d can be expressed using the following equation (3). R1 = A1 / P1 …(3) Furthermore, after tightening the tilt adjustment screw 205c, which increases the amount of protrusion, it is preferable to loosen the tilt adjustment screw 205a, which reduces the amount of protrusion of the tilt adjustment screws 205a to 205d. This prevents a part of the reel 201, specifically the part corresponding to the midpoint between the tilt adjustment screws 205a and 205c, from descending. As a result, it is possible to prevent the tilt adjustment screws 205b and 205d from sinking into the plate 202.

[0032] The tilt adjustment screws 205b and 205d are also adjusted using the laser displacement meter 210, similar to the tilt adjustment screws 205a and 205b. The tilt of the reel 201 is adjusted in the same manner. Furthermore, it is possible to prevent the tilt adjustment screws 205a and 205c from sinking into the plate 202.

[0033] Next, the eccentricity adjustment operation of the position adjustment mechanism 200 will be explained with reference to Figures 3 to 6.

[0034] As shown in Figure 4, the motor shaft 208 has a taper 212 that narrows towards its tip. The angle between the taper 212 and the rotation axis Z2 of the motor shaft 208 is preferably 45 degrees. The three tapers 212 are preferably arranged at 120-degree intervals around the rotation axis Z2 on a circle centered on the rotation axis Z2. The motor shaft 208 and the plate 202 are fastened together via fixing screws 207.

[0035] As described above, the three eccentricity adjustment screws 206 are arranged at 120-degree intervals around the rotation axis Z1 on a circle on the plate 202. As shown in Figure 5, the tips of the eccentricity adjustment screws 206 have a taper 211. The angle between the taper 211 and the rotation axis Z1 of the plate 202 is preferably 45 degrees. The taper 212 at the tip of the motor shaft 208 and the taper 211 of the eccentricity adjustment screw 206 are in contact.

[0036] Loosen the fixing screw 207 to temporarily fasten the plate 202 and the motor shaft 208. This allows the three eccentricity adjustment screws 206 to determine the positional relationship between the plate 202 and the motor shaft 208. For example, loosening eccentricity adjustment screw 206A moves it upward (in this case, in the positive Z-axis direction). This causes the taper 211 to move away from the taper 212. Next, tightening eccentricity adjustment screw 206B moves it downward (in this case, in the negative Z-axis direction). This causes the taper 211 to press against the taper 212. The motor shaft 208 moves relative to the plate 202 towards the eccentricity adjustment screw 206A side (in this case, in the positive X-axis direction). In other words, the plate 202 moves relative to the motor shaft 208 towards the eccentricity adjustment screw 206B side (in this case, in the negative X-axis direction). The relative positions of the motor 203 and the plate 202 can be moved, allowing for adjustment of the eccentricity of the reel 201. For example, the relative positions of the motor 203 and the plate 202 can be moved so that the rotation axis Z1 of the plate 202 and the rotation axis Z2 of the motor shaft 208 are aligned in the same straight line.

[0037] Next, we will explain the specific eccentricity adjustment operation of the position adjustment mechanism 200.

[0038] First, the motor 203 is moved to rotate the reel 201 once. During the rotation of the reel 201, the displacement of the cylindrical surface 201AA of the reel 201 is measured using the laser displacement meter 210. Specifically, measurements are taken at the intersection points y1, y2, and y3 between the lines extending from the rotation axis Z1 to each eccentric adjustment screw 206 and the cylindrical surface 201AA, and the measured values ​​Y1, Y2, and Y3 can be obtained. The measurement results are shown in Figure 6. The tape retraction mechanism 105 shown in Figure 12 includes a leader block (not shown). This leader block moves into or is housed in the notch 201AB of the reel 201. Based on the rotation speed and time of the motor 203, the measured values ​​Y1, Y2, and Y3 at each measurement point y1, y2, and y3 can be determined starting from the notch 201AB.

[0039] The measured value Y is proportional to the rotational speed R2 of the eccentricity adjustment screw 206. The relationship between the rotational speed R2 of the eccentricity adjustment screw 206, the screw pitch P2 of the eccentricity adjustment screw 206, and the measured value YY can be expressed using the following equation (4). R2 = YY / P2 …(4) Note that the positive direction of the displacement measurement value measured by the laser displacement meter 210 is the direction away from the laser displacement meter 210, that is, the direction toward the inside of the cylindrical surface 201AA. The measurement value Y1 indicates that the measurement point y1 is located inside the cylindrical surface compared to the average value of the cylindrical surface.

[0040] Next, loosen the fixing screw 207 just enough so that no torque is applied when you turn the torque screwdriver.

[0041] Next, of the three eccentricity adjustment screws 206, the screw 206 intended to be rotated in the loosening direction is rotated, followed by the screw 206 intended to be rotated in the tightening direction. In the example shown in Figure 6, first, eccentricity adjustment screw 206A is rotated Y1 / P2 in the loosening direction, and then eccentricity adjustment screw 206B is rotated Y2 / P in the loosening direction. After that, eccentricity adjustment screw 206C is rotated Y3 / P in the tightening direction. The plate 202 and reel 201 move so that the measurement points y1, y2, and y3 approach the average value of the cylindrical surface.

[0042] Finally, tighten the fixing screw 207. The position of the plate 202 and the motor shaft 208 is fixed. As a result, the eccentricity of the reel 201 can be adjusted.

[0043] (Another example configuration) The position adjustment mechanism 300 will be described with reference to Figures 6 and 7.

[0044] The position adjustment mechanism 300 is a modified version of the position adjustment mechanism 200. The position adjustment mechanism 300 has the same configuration as the position adjustment mechanism 200, except that it is equipped with four eccentricity adjustment screws 206 and a motor shaft 308.

[0045] The reel 201 and plate 202 receive rotational driving force from the motor 203 via the motor shaft 308 and rotate around the rotation axis Z1. Four eccentricity adjustment screws 206 are arranged at 90-degree intervals around the rotation axis Z1 on a circle on the plate 202. The four eccentricity adjustment screws 206 are connected to the reel 201 from above by inserting, for example, a screwdriver bit (not shown). The four eccentricity adjustment screws 206 can rotate by receiving rotational driving force from the screwdriver bit. The end of the motor shaft 308 on the plate 202 side has a taper 212. The ends of the four eccentricity adjustment screws 206 on the motor shaft 308 side have a taper 211. The ends of the four eccentricity adjustment screws 206 and the end of the motor shaft 308 are in contact. Therefore, the four eccentricity adjustment screws 206 can be rotated by receiving rotational driving force from a screwdriver bit from above the reel 201. The position of the reel 201 and plate 202 is adjusted by the movement of the four eccentricity adjustment screws 206 relative to the motor shaft 208. In other words, the eccentricity of the reel 201 can be adjusted in the position adjustment mechanism 300 in the same way as in the position adjustment mechanism 200.

[0046] (First jig) The jig 400 will be described with reference to Figures 9 and 10.

[0047] As shown in Figure 9, the jig 400 comprises a frame 401, a first gear 403, a second gear 404, a first driver bit 402, and a second driver bit 405.

[0048] The first gear 403 is rotatably mounted on the frame 401. The first gear 403 and the second gear 404 are rotatably mounted on the frame 401. The first gear 403 and the second gear 404 mesh with each other. The diameters of the first gear 403 and the second gear 404 are preferably approximately the same.

[0049] Shaft 409A extends from the pivot axis of the first gear 403 through the frame 401. The first driver bit 402 extends along the pivot axis of the first gear 403 via shaft 409A. Shaft 409B extends from the pivot axis of the first gear 403 in a direction away from the frame 401 (here, in the negative Z-axis direction). A handle 408 is mechanically connected to the end of shaft 409B. The handle 408 is substantially cylindrical or tubular. The diameter of the handle 408 is greater than the diameter of shaft 409B.

[0050] The handle 408 is mechanically connected to the first gear 403 via the shaft 409B. The handle 408 is mechanically connected to the first driver bit 402 via the shafts 409B and 409A.

[0051] The hollow shaft 406 extends from the pivot axis of the second gear 404 through the frame 401. The second driver bit 405 extends along the pivot axis of the second gear 404 via the hollow shaft 406. The hollow shaft 406 is provided with a phase adjustment screw 407. By rotating the phase adjustment screw 407, the phase of the second driver bit 405 can be adjusted by rotating the second driver bit 405 without rotating the second gear 404 or the first driver bit 402.

[0052] When the handle 408 is rotated, the first gear 403 and the first driver bit 402 can be rotated in the same direction as the rotation of the handle 408. Also, since the first gear 403 and the second gear 404 mesh with each other, the rotation of the first gear 403 causes the second gear 404 to rotate in the opposite direction to the rotation of the handle 408. The rotation of the second gear 404 causes the second driver bit 405 to rotate.

[0053] Here, the jig 400 is used to perform the tilt adjustment operation of the position adjustment mechanism 200.

[0054] As shown in Figure 10, first, insert the first screwdriver bit 402 into the tilt adjustment screw 205a, and then insert the second screwdriver bit 405 into the tilt adjustment screw 205c. The first screwdriver bit 402 engages with the tilt adjustment screw 205a, and the second screwdriver bit 405 engages with the tilt adjustment screw 205c.

[0055] Next, loosen the phase adjustment screw 407 to align the phase of the second driver bit 405 with the tilt adjustment screw 205. Tighten the phase adjustment screw 407 to fix the phase of the second driver bit 405.

[0056] Finally, the handle 408 is rotated. As the first gear 403 rotates, the first driver bit 402 rotates, and the second driver bit 405 rotates in the opposite direction to the rotation of the first driver bit 402 via the second gear 404. The amount of rotation of the first driver bit 402 and the amount of rotation of the second driver bit 405 are the same. In other words, the tilt adjustment screws 205a and 205c can be rotated simultaneously in opposite directions by the same amount. This makes it possible to adjust the tilt of the reel 201 without changing the height of the reel 201.

[0057] (Second jig) There is a jig 500 shown in Figure 11. Jig 500 is a modified version of jig 400 shown in Figures 9 and 10.

[0058] The jig 500 has the same configuration as the jig 400, except for the first gear 403, the second gear 404, and the frame 401. The jig 500 comprises the first gear 503, the second gear 504, and the frame 501. The first gear 503 has the same configuration as the first gear 403, except for its diameter. The second gear 504 has the same configuration as the second gear 404, except for its diameter. The frame 501 has the same configuration as the frame 401, except for its size.

[0059] In the position adjustment mechanism 300 shown in Figures 6 and 7, of the four eccentricity adjustment screws 206, two are located on either side of the rotation axis Z1 of the reel 201. The diameters of the first gear 503 and the second gear 504 are determined so that the first driver bit 402 and the second driver bit 405 can be inserted into these two eccentricity adjustment screws 206, respectively. The size of the frame 501 is determined according to the diameters of the first gear 503 and the second gear 504.

[0060] Here, the jig 500 is used to perform the eccentric adjustment operation of the position adjustment mechanism 300 shown in Figures 6 and 7.

[0061] As shown in Figure 11, first, the first screwdriver bit 402 and the second screwdriver bit 405 are inserted into the two eccentricity adjustment screws 206 that sandwich the rotation axis Z1 of the reel 201. The first screwdriver bit 402 and the second screwdriver bit 405 engage with these two eccentricity adjustment screws 206, respectively.

[0062] Next, loosen the phase adjustment screw 407 to align the phase of the second driver bit 405 with the tilt adjustment screw 205. Tighten the phase adjustment screw 407 to fix the phase of the second driver bit 405.

[0063] Finally, rotate the handle 408. As the first gear 403 rotates, the first driver bit 402 rotates, and the second driver bit 405 rotates in the opposite direction to the rotation of the first driver bit 402 via the second gear 404. The amount of rotation of the first driver bit 402 and the amount of rotation of the second driver bit 405 are the same. In other words, by simply rotating the handle 408, these two eccentricity adjustment screws 206 can be rotated simultaneously in opposite directions by the same amount.

[0064] The same procedure is performed for the other two eccentricity adjustment screws 206. In other words, by simply rotating the handle 408, the other two eccentricity adjustment screws 206 can be rotated simultaneously in opposite directions by the same amount.

[0065] Therefore, the eccentricity of reel 201 can be easily adjusted.

[0066] Although the present disclosure has been described above with reference to embodiments, the present disclosure is not limited to the embodiments described above. Various modifications to the structure and details of the present disclosure can be made as can be understood by those skilled in the art within the scope of the present disclosure. Furthermore, each embodiment can be combined with other embodiments as appropriate.

[0067] Each drawing is merely illustrative to illustrate one or more embodiments. Each drawing may be associated with one or more other embodiments rather than with only one specific embodiment. As those skilled in the art will understand, various features or steps described with reference to any one drawing can be combined with features or steps shown in one or more other drawings, for example, to create embodiments not explicitly shown or described. Not all features or steps shown in any one drawing to illustrate an exemplary embodiment are necessarily required, and some features or steps may be omitted. The order of steps shown in any of the drawings may be changed as appropriate.

[0068] Some or all of the above embodiments may also be described as follows, but are not limited to the following: (Note 1) A plate and Fastening screws and It is equipped with four tilt adjustment screws, The fastening screws fasten the plate and the reel capable of winding the magnetic tape. The four tilt adjustment screws are arranged at 90-degree intervals around the rotation axis of the reel on a circle around the rotation axis of the reel. The tilt of the reel is adjusted by the movement of the four tilt adjustment screws relative to the plate. Position adjustment mechanism. (Note 2) It also features three eccentricity adjustment screws, The reel and the plate receive rotational driving force from the motor via the motor shaft and rotate around the rotation axis. The three eccentricity adjustment screws are arranged at 120-degree intervals with respect to the rotation axis of the plate on a circle around the rotation axis of the plate. The tip of the motor shaft and the tips of the three eccentricity adjustment screws each have a taper. The tips of the three eccentricity adjustment screws and the tip of the motor shaft come into contact, The three eccentricity adjustment screws move relative to the motor shaft to adjust the positions of the reel and the plate. The position adjustment mechanism described in Appendix 1. (Note 3) It also features four eccentricity adjustment screws, The reel and the plate receive rotational driving force from the motor via the motor shaft and rotate around the rotation axis. The four eccentricity adjustment screws are arranged at 90-degree intervals with respect to the rotation axis of the plate on a circle around the rotation axis of the plate. The tip of the motor shaft and the tips of the four eccentricity adjustment screws each have a taper. The tips of the four eccentricity adjustment screws and the tip of the motor shaft come into contact, The four eccentricity adjustment screws move relative to the motor shaft to adjust the positions of the reel and the plate. The position adjustment mechanism described in Appendix 1. (Note 4) The four tilt adjustment screws are located inside the hub of the reel. The position adjustment mechanism described in Appendix 1 or 2. (Note 5) It further comprises four of the aforementioned fastening screws, The four fastening screws are each positioned between the four tilt adjustment screws and the rotation axis of the reel. The position adjustment mechanism described in Appendix 1 or 2. (Note 6) The angle between the taper at the tip of the motor shaft and the axis of the motor shaft is 45 degrees. The angle formed by the taper at the tip of each of the three eccentricity adjustment screws and the axis of each of the three eccentricity adjustment screws is 45 degrees. The position adjustment mechanism described in Appendix 2. (Note 7) The angle between the taper at the tip of the motor shaft and the axis of the motor shaft is 45 degrees. The angle formed by the taper at the tip of each of the four eccentricity adjustment screws and the axis of each of the four eccentricity adjustment screws is 45 degrees. The position adjustment mechanism described in Appendix 3. (Note 8) It is a jig, The aforementioned jig is used in the position adjustment mechanism. The position adjustment mechanism comprises a plate, fastening screws, and four tilt adjustment screws. The fastening screws fasten the plate and the reel capable of winding the magnetic tape. The four tilt adjustment screws are arranged at 90-degree intervals around the rotation axis of the reel on a circle around the rotation axis of the reel. The aforementioned jig is First and second gears, A first and second driver bit, The first and second gears mesh with each other, The first and second driver bits each extend along the pivot axes of the first and second gears and engage with the two tilt adjustment screws that sandwich the rotation axis of the reel. When the first gear rotates, the first driver bit rotates, and the second driver bit rotates via the second gear in the opposite direction to the rotation of the first driver bit. The amount of rotation of the first driver bit and the amount of rotation of the second driver bit are the same. jig. (Note 9) It is a jig, The aforementioned jig is used in the position adjustment mechanism. The position adjustment mechanism comprises a plate, fastening screws, four tilt adjustment screws, and four eccentricity adjustment screws. The fastening screws fasten the plate and the reel capable of winding the magnetic tape. The four tilt adjustment screws are arranged at 90-degree intervals around the rotation axis of the reel on a circle around the rotation axis of the reel. The reel and the plate receive rotational driving force from the motor via the motor shaft and rotate around the rotation axis. The four eccentricity adjustment screws are arranged at 90-degree intervals with respect to the rotation axis of the plate on a circle around the rotation axis of the plate. The tip of the motor shaft and the tips of the four eccentricity adjustment screws each have a taper. The tips of the four eccentricity adjustment screws and the tip of the motor shaft come into contact, The aforementioned jig is First and second gears, A first and second driver bit, The first and second gears mesh with each other, The first and second driver bits each extend along the pivot axes of the first and second gears and engage with the two eccentricity adjustment screws that sandwich the rotation axis of the plate. When the first gear rotates, the first driver bit rotates, and the second driver bit rotates via the second gear in the opposite direction to the rotation of the first driver bit. The amount of rotation of the first driver bit and the amount of rotation of the second driver bit are the same. jig. (Note 10) A method for adjusting the position of a position adjustment mechanism, The position adjustment mechanism comprises a plate, fastening screws, and four tilt adjustment screws. The fastening screws fasten the plate and the reel capable of winding the magnetic tape. The four tilt adjustment screws are arranged at 90-degree intervals around the rotation axis of the reel on a circle around the rotation axis of the reel. The tilt of the reel is adjusted by moving the four tilt adjustment screws to the plate. How to adjust the position.

[0069] Some or all of the elements (e.g., configuration and function) described in Appendices 2 to 7 that are dependent on Appendice 1 may also be dependent on Appendices 8 to 10 in the same way as in Appendices 2 to 7. Some or all of the elements described in any appendice may be applicable to various hardware, software, recording means, systems, and methods for recording software. [Explanation of Symbols]

[0070] 100 Magnetic tape drive 101 Cartridge slot 102 cartridges 104 Cartridge transport mechanism 105 Tape reel mechanism 106 cartridge internal reels 107 Reels inside magnetic tape drive 108 Motor 109 Tapes 111, 112 flange 200, 300 position adjustment mechanism 201 Reels 201A Hub 201AA Cylindrical surface 201B flange 201C bottom 202 Plate 202A Top surface 203 Motor 204 Fastening screws 205, 205a, 205b, 205c, 205d Adjustment screws 206, 206A, 206B, 206C Eccentricity adjustment screws 207 Fixing screws 208, 308 motor shafts 209, 210 Laser displacement meter 211, 212 Taper 400, 500 jigs 401, 501 frames 402 First driver bit 403, 503 First gear 404, 504 Second gear 405 Second driver bit 406 Hollow Shaft 407 Phase adjustment screw 408 Handle 409A, 409B shaft 501 Frame

Claims

1. A plate and Fastening screws and It is equipped with four tilt adjustment screws, The fastening screws fasten the plate and the reel capable of winding the magnetic tape. The four tilt adjustment screws are arranged at 90-degree intervals around the rotation axis of the reel on a circle around the rotation axis of the reel. The tilt of the reel is adjusted by the movement of the four tilt adjustment screws relative to the plate. Position adjustment mechanism.

2. It also features three eccentricity adjustment screws, The reel and the plate receive rotational driving force from the motor via the motor shaft and rotate around the rotation axis. The three eccentricity adjustment screws are arranged at 120-degree intervals with respect to the rotation axis of the plate on a circle around the rotation axis of the plate. The tip of the motor shaft and the tips of the three eccentricity adjustment screws each have a taper. The tips of the three eccentricity adjustment screws and the tip of the motor shaft come into contact, The three eccentricity adjustment screws move relative to the motor shaft to adjust the positions of the reel and the plate. The position adjustment mechanism according to claim 1.

3. It also features four eccentricity adjustment screws, The reel and the plate receive rotational driving force from the motor via the motor shaft and rotate around the rotation axis. The four eccentricity adjustment screws are arranged at 90-degree intervals with respect to the rotation axis of the plate on a circle around the rotation axis of the plate. The tip of the motor shaft and the tips of the four eccentricity adjustment screws each have a taper. The tips of the four eccentricity adjustment screws and the tip of the motor shaft come into contact, The four eccentricity adjustment screws move relative to the motor shaft to adjust the positions of the reel and the plate. The position adjustment mechanism according to claim 1.

4. The four tilt adjustment screws are located inside the hub of the reel. The position adjustment mechanism according to claim 1 or 2.

5. It further comprises four of the aforementioned fastening screws, The four fastening screws are each positioned between the four tilt adjustment screws and the rotation axis of the reel. The position adjustment mechanism according to claim 1 or 2.

6. The angle between the taper at the tip of the motor shaft and the axis of the motor shaft is 45 degrees. The angle formed by the taper at the tip of each of the three eccentricity adjustment screws and the axis of each of the three eccentricity adjustment screws is 45 degrees. The position adjustment mechanism according to claim 2.

7. The angle between the taper at the tip of the motor shaft and the axis of the motor shaft is 45 degrees. The angle formed by the taper at the tip of each of the four eccentricity adjustment screws and the axis of each of the four eccentricity adjustment screws is 45 degrees. The position adjustment mechanism according to claim 3.

8. It is a jig, The aforementioned jig is used in the position adjustment mechanism. The position adjustment mechanism comprises a plate, fastening screws, and four tilt adjustment screws. The fastening screws fasten the plate and the reel capable of winding the magnetic tape. The four tilt adjustment screws are arranged at 90-degree intervals around the rotation axis of the reel on a circle around the rotation axis of the reel. The aforementioned jig is First and second gears, It comprises first and second driver bits, The first and second gears mesh with each other, The first and second driver bits each extend along the pivot axes of the first and second gears and engage with the two tilt adjustment screws that sandwich the rotation axis of the reel. When the first gear rotates, the first driver bit rotates, and the second driver bit rotates via the second gear in the opposite direction to the rotation of the first driver bit. The amount of rotation of the first driver bit and the amount of rotation of the second driver bit are the same. jig.

9. It is a jig, The aforementioned jig is used in the position adjustment mechanism. The position adjustment mechanism comprises a plate, fastening screws, four tilt adjustment screws, and four eccentricity adjustment screws. The fastening screws fasten the plate and the reel capable of winding the magnetic tape. The four tilt adjustment screws are arranged at 90-degree intervals around the rotation axis of the reel on a circle around the rotation axis of the reel. The reel and the plate receive rotational driving force from the motor via the motor shaft and rotate around the rotation axis. The four eccentricity adjustment screws are arranged at 90-degree intervals with respect to the rotation axis of the plate on a circle around the rotation axis of the plate. The tip of the motor shaft and the tips of the four eccentricity adjustment screws each have a taper. The tips of the four eccentricity adjustment screws and the tip of the motor shaft come into contact, The aforementioned jig is First and second gears, It comprises first and second driver bits, The first and second gears mesh with each other, The first and second driver bits each extend along the pivot axes of the first and second gears and engage with the two eccentricity adjustment screws that sandwich the rotation axis of the plate. When the first gear rotates, the first driver bit rotates, and the second driver bit rotates via the second gear in the opposite direction to the rotation of the first driver bit. The amount of rotation of the first driver bit and the amount of rotation of the second driver bit are the same. jig.

10. A method for adjusting the position of a position adjustment mechanism, The position adjustment mechanism comprises a plate, fastening screws, and four tilt adjustment screws. The fastening screws fasten the plate and the reel capable of winding the magnetic tape. The four tilt adjustment screws are arranged at 90-degree intervals around the rotation axis of the reel on a circle around the rotation axis of the reel. The tilt of the reel is adjusted by moving the four tilt adjustment screws to the plate. How to adjust the position.

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