JP2006031838A - Disk holding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a disk holding device capable of stably securing a level attitude of a selected disk by improving a state of engagement between grooves of a disk guide member and engaging pins of a holding member. <P>SOLUTION: The disk holding device includes a disk holding member where two or more pieces of engaging pins of which the base part is level but tapered and sloped toward the tip halfway are projectingly arranged almost at equal intervals on an inner peripheral surface of a disk shaft center aligning member; and a disk guide member where the grooves to be engaged with the engaging pins are spirally formed on an outer peripheral surface with a concentric part made continuous with the sloped part, and where the grooves in the concentric part are formed to be level grooves and the grooves in the sloped part are formed to be sloped grooves which are tapered and sloped toward the groove bottoms. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a disk holding apparatus for storing and holding a plurality of disks inserted from the outside in the apparatus, and delivering the stored and held disks to a disk transport mechanism during reproduction or ejection.

  Conventionally, this type of disk holding device has a cylindrical disk guide member in which a concentric part and an inclined part are continuously formed on the outer peripheral surface, and a groove is formed in a spiral shape, and the disk holding member is placed in the spiral groove. The disc is selected by moving the disc holding member in the axial direction of the disc guide member by engaging the engaging pins and rotating the disc guide member (see, for example, Patent Document 1).

  Usually, in order to spirally groove the outer peripheral surface of a cylindrical disk guide member, considering the workability of a molding die (hereinafter, abbreviated as a die), a cutting tool for machining is used. The mold or blade is rotated to make a spiral groove in the mold. For this reason, the spiral groove shape is uniformly the same shape, and even if the groove needs to have a gradient even partially, the entire groove circumference becomes a gradient groove, and it will inevitably be fitted in the position of the part where the mold fits. Variations due to joint play occurred (If the spiral shape has an equal pitch, it can be processed by the method of rotation removal, so it can be formed even with a straight groove, but in the case of an irregular pitch, a gradient is required. ).

As a result, the engaging pin of the disk holding member that engages with the groove of the disk guide member is not stable. As a result, the horizontal holding of the disk becomes unstable depending on the use state or the use environment. In addition, due to the influence of vibration and temperature change, the disc held by the disc holding member tilts, and the disc clamping operation by the disc transport mechanism is not reliable when the disc is transported or moved in the device. I had to be.
In addition, by requesting the standards required for the component parts to the groove of the disk guide member, the disk holding member, etc., the tolerance of this component part has to be tightened, and the component part with low yield is used. .

  Furthermore, when the disk guide member is formed by combining cylindrical molds that can be divided and driven in a radial manner, and after the molding, the mold is divided into a plurality of pieces in a radial manner, and the product is taken out in the depth direction of the groove. If there is no gradient to reduce the thickness, the mold may interfere with the product at the time of separation depending on the molding location, and the product cannot be taken out. Therefore, depending on the number of divisions of the mold, it is necessary to take a draft in the depth direction of the groove by an amount shifted from the direction in which the divided mold (piece) is separated.

JP 2000-090544 A ([0002] to [0005], FIGS. 17 to 20)

  The cylindrical disk guide member used in the conventional disk holding device requires a narrow draft in the groove formed in the outer peripheral portion as described above. For this reason, the disk holding member having the engaging pin engaged with the groove may move in the horizontal direction due to vibration or the like due to the gap between the bottom of the groove and the tip of the pin. In this case, the disk holding member moves in the axial direction of the disk guide member via the engagement pin due to the draft in the depth direction of the groove, and tilts up and down. For this reason, the reliability of the clamping operation for delivering the disc to the holding mechanism is lowered when the disc stored and held in the disc holding device is played or ejected, and in some cases, the disc cannot be played or ejected. It was.

  The present invention has been made to solve the above-described problems, and improves the engagement state between the groove of the disk guide member and the engagement pin of the disk holding member, and ensures a stable horizontal posture of the selected disk. It is an object of the present invention to obtain a disc holding device capable of performing the above.

  The disc holding device according to the present invention has a disc holding member in which a plurality of engaging pins projecting at substantially equal intervals are provided on the inner peripheral surface of the disc axis alignment member, with the base portion being horizontal and tapered from the middle toward the tip. And a concentric circular part and an inclined part are continuously formed on the outer peripheral surface to form a groove in which the engaging pin engages, and the groove of the concentric circular part is a horizontal groove having no gradient, and the groove of the inclined part Is provided with a disk guide member formed as an inclined groove tapered toward the groove bottom.

  The disc holding device according to the present invention has a disc holding member in which a plurality of engaging pins projecting at substantially equal intervals are provided on the inner peripheral surface of the disc axis alignment member, with the base portion being horizontal and tapered from the middle toward the tip. And a concentric circular portion and an inclined portion are continuously formed on the outer peripheral surface to form a groove in which the engagement pin engages, and the groove of the concentric circular portion is a horizontal groove having no gradient at the entrance portion and is formed from the middle. An inclined groove tapered toward the bottom is provided, and the groove of the inclined portion includes a disk guide member including only the inclined groove continuous with the inclined groove of the concentric circular portion.

  In the disk holding device according to the present invention, a plurality of engagement pins that taper and incline toward the tip end are provided at substantially equal intervals on the inner peripheral surface of the disk axis alignment member, and each of the engagement pins faces the center. A disk holding member with an evenly applied urging force, and a concentric circular part and an inclined part are continuously formed on the outer peripheral surface to form a groove that engages with the engaging pin, and this groove is formed from the entrance part to the groove bottom. And a disk guide member formed as an inclined groove that is tapered toward the end.

  According to the present invention, in the holding state of the disc, the horizontal portion of the engaging pin is engaged with the horizontal groove of the concentric circular portion of the disc guide member. Even if the disk holding member moves in the horizontal direction due to the gap between the tip of the mating pin and the bottom of the groove, the disk holding member does not tilt up and down. As a result, the horizontal posture of the disk holding member, i.e., the disk can be stably secured, and the reliability of the clamping operation for delivering the disk to the disk transport mechanism when the disk is transported / moved in the disk holding device This is advantageous in that the disc can be reliably reproduced and ejected.

  According to the present invention, the groove formed on the outer peripheral surface of the disk guide member is a concentric circular portion that is a horizontal groove having no gradient at the entrance portion, and is an inclined groove that is tapered from the middle toward the groove bottom, and the inclined portion is concentric. In the holding state of the disc, it is possible to prevent the disc holding member from tilting up and down even if it moves in the horizontal direction due to vibration or the like. The engaging pins that engage with the disc can smoothly move in the groove, and the disc can be moved stably in the vertical direction.

  According to the present invention, since the urging force toward the center is equally applied to the engaging pin, when the engaging pin is engaged with the groove of the disk guide member, the tip of the engaging pin comes into contact with the groove bottom. As a result, even if the disk holding member receives vibration or the like, the disk holding member does not move in the horizontal direction, and even if the groove of the disk guide member is an inclined groove tapered toward the groove bottom from the entrance, There is an effect that tilting up and down can be surely prevented.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a front view showing a cylindrical disk guide member. The disk guide member includes a first disk guide member 10 and a second disk guide member 20. The first disk guide member 10 has three spiral grooves 11a, 11b, and 11c formed in a spiral shape on the outer peripheral surface by concentric circular portions and inclined portions being continuous, and the concentric circular portions are horizontal with no gradient. The inclined portion is an inclined groove that is tapered toward the groove bottom. The concentric portions of the three spiral grooves 11a, 11b, and 11c are formed at the same height position, and the three spiral grooves 11a, 11b, and 11c are provided in a second later-described manner. The connection end with the disc guide member 20 is open.

  The second disc guide member 20 has three spiral grooves 21a, 21b, and 21c formed in a spiral shape on the outer peripheral surface by concentric circular portions and inclined portions being continuous, and the concentric circular portions have no gradient. A horizontal groove is formed, and the inclined portion is an inclined groove that is tapered toward the groove bottom. The concentric portions of the three spiral grooves 21a, 21b, and 21c are formed at the same height, and the three spiral grooves 21a, 21b, and 21c are formed on the first disk. It opens to the connecting end with the guide member 10. Then, one end of the first disk guide member 10 is brought into contact with one end of the second disk guide member 20, and the spiral grooves 11a, 11b, and 11c are communicated with the spiral grooves 21a, 21b, and 21c. . On the contact surfaces of the first disc guide member 10 and the second disc guide member 20, there are relatively concave and convex engaging portions 12 and 22 formed.

  FIG. 2 is an enlarged front view of a part of the three spiral grooves 21a, 21b, and 21c. In the spiral grooves 21a, 21b, and 21c, the concentric circular portion X is a U-shaped horizontal groove 22 having no gradient as shown in FIG. 3 (a), and the inclined portion Y is shown in FIG. 3 (b). Thus, the inclined groove 23 is tapered toward the groove bottom.

  FIG. 4A is a cross-sectional view of a part of a mold 30a having a protruding portion 31 for forming a horizontal groove 22 without a gradient, and FIG. 4B is an inclined groove 23 that is tapered toward the groove bottom. 4 is a cross-sectional view of a part of a mold 30b having a protruding portion 32 for forming the protrusion 30, and by removing the protruding portion 31 of the mold 30a shown in FIG. The protruding portion 32 for forming the inclined groove 23 can be formed with high accuracy.

  Then, these metal molds 30a and 30b are combined in a cylindrical shape as shown in FIG. 5, and the disk guide members 10 and 20 are molded. In this case, since the horizontal groove 22 corresponding to the concentric circular portion X is horizontal even if there is no gradient, there is no problem in removing the mold from the product. Further, since the inclined groove 23 corresponding to the inclined portion Y is provided with a gradient, there is no problem in removing the mold from the product.

  FIG. 6 is a plan view showing a state in which the disc holding member 50 is assembled to the second disc guide member 20 created as described above. The disk holding member 50 is formed by, for example, punching a metal plate into a donut shape, and integrally providing a disk axis alignment member 51 around the center hole of the donut shape. The base portion is provided with engaging pins 53a, 53b, 53c that are horizontal and taper from the middle toward the tip, and project at substantially equal intervals. The engaging pins 53a, 53b, and 53c are connected to the three spiral grooves 11a, 11b, 11c, 21a, 21b of the first and second disk guide members 10 and 20 connected as shown in FIG. 21c is engaged and moved.

Next, the operation will be described.
When the second disk guide member 20 is driven to rotate by a drive source (not shown), the first disk guide member 10 engaged with the second disk guide member 20 also rotates together. As a result of this rotation, the disk holding member 50 has three helical grooves 11a, 11b, 11c. Since it is engaged with 21a, 21b, 21c, it moves in the axial direction of the first and second disk guide members 20.

  Even when the disk holding member 50 is subjected to vibration or the like and moves in the horizontal direction by the gap between the groove bottom and the tip of the pin in the disk holding state, as shown in FIGS. Since the horizontal grooves 22 of the concentric circular portions of the guide members 10 and 20 and the horizontal portions of the engaging pins 53a, 53b, and 53c are in contact with each other, the disc holding member 50 does not tilt in the axial direction, that is, the vertical direction. In this case, if the engaging pins 53a, 53b, 53c are configured to have an elliptical cross section as shown in FIG. 9, the horizontal groove 22 and the horizontal portions of the engaging pins 53a, 53b, 53c are in surface contact. , Horizontal holding becomes more stable.

  As described above, according to the first embodiment, the concentric part and the inclined part are continuously formed on the outer peripheral surface of the disc guide member to form a groove in a spiral shape, and the disc is held in the horizontal groove of the concentric part. Since the horizontal portion of the engaging pin of the member is engaged, the disc holding member can be held even if it moves in the horizontal direction due to the gap between the engaging pin tip and the groove bottom due to vibration or the like. The member does not tilt up and down. As a result, the horizontal posture of the disc can be stably secured, and when the disc is transported and moved in the disc holding device, the reliability of the clamp operation for delivering the disc to the disc transport mechanism is maintained, and the disc can be reproduced. The discharge can be performed reliably.

Embodiment 2. FIG.
In Embodiment 2, a concentric circular portion X and an inclined portion Y are continuously formed on the outer peripheral surface to form a groove in a spiral shape. A disk guide member 80 is used in which the inclined groove is tapered and the inclined portion Y has only an inclined groove continuous with the inclined groove of the concentric circular portion X.

  FIG. 10 shows an electrode 60 for obtaining a mold for forming the disk guide member 60 by electric discharge machining. A concentric portion is formed on the outer peripheral surface of a metallic cylindrical material 61 by cutting with a machine. Spiral grooves 62a, 62b and 62c in which X and the inclined portion Y are made continuous are formed. The spiral grooves 62a, 62b, and 62c are horizontal grooves having no gradient at the entrance, and are inclined grooves that are tapered toward the groove bottom from the middle. After the groove processing, the hatched portion 63 in FIG. 10 is removed so that the outer peripheral surface corresponding to the concentric part of the electrode is free of the horizontal groove.

  FIG. 11 is a longitudinal sectional view showing a mold 70 created by electric discharge machining using the electrode of FIG. On the inner surface of the mold, spiral projections 71a, 71b, 71c in which concentric circular portions X and inclined portions Y are made continuous are formed, and the bases of the projections corresponding to the concentric circular portions X are horizontally projected. In the shape portion, the tip portion is an inclined protrusion portion tapered from the middle, and the protrusion portion corresponding to the inclined portion Y is only the inclined protrusion portion having the same shape that is continuous with the inclined protrusion portion of the concentric circular portion. Then, after molding, the mold is divided in the axial direction with the concentric part and the inclined part of the spiral projecting part as a boundary to obtain the divided mold shown in FIG.

  At the time of molding, the split mold shown in FIG. 11 is combined in a cylindrical shape so that the concentric circular part X and the inclined part Y of the spiral projecting part are continuous. After the molding, the mold is illustrated. As shown in FIG. 5, the split mold is removed radially to take out the molded product 80. FIG. 12 is a longitudinal sectional view showing this molded product 80, and on its outer surface, three spiral grooves 81a, 81b having the same concentric part and inclined part as the electrode shown in FIG. 81c is formed.

  FIG. 13 shows a state of use of the disk guide member 80 which is the molded product of FIG. 12, and the three engaging pins 53a, 53b, 53c of the disk holding member 50 shown in FIGS. Engage with the three spiral grooves 81a, 81b, 81c. In this case, the engaging pins 53a, 53b, and 53c are those having a base portion that is horizontal and tapered from the middle toward the tip. The tapered portion engages with the inclined groove, and the horizontal portion of the base portion is horizontal. Engage with the groove. With this configuration, when the disk guide member 80 rotates, the disk holding member 50 has three spiral grooves 81a, 81b, and 83d of the disk guide member 80 with which the three engagement pins 53a, 53b, and 53c are engaged. It moves in the axial direction along 81c, that is, in the direction orthogonal to the paper surface in FIG.

  Further, when the disk holding member 50 moves in a horizontal direction perpendicular to the axis line due to vibration or the like in a stopped state where the disk guide member 80 does not rotate, the entrances of the three spiral grooves 81a, 81b, 81c Since the base horizontal portion of the engaging pins 53a, 53b, and 53c is in contact with the horizontal groove, it does not move in the axial direction, and the disk holding member does not tilt up and down. As a result, the horizontal posture of the disk holding member, i.e., the disk, can be stably secured, and the reliability of the clamping operation for delivering the disk to the disk transport mechanism when the disk is transported / moved in the disk holding device is improved. The disc can be reliably reproduced and ejected.

  As described above, according to the second embodiment, a spiral groove is formed by machining an electrode to be subjected to electric discharge machining on a mold, and an entrance portion forms a horizontal groove and becomes a tapered inclined groove from the middle toward the groove bottom. In areas where only inclined grooves are required, the surface of the cylindrical material, including horizontal grooves, is removed over the entire length so as to leave the inclined grooves, so that complicated three-dimensional processing and manual processing are performed. Thus, an electrode for producing a mold by electric discharge machining can be manufactured by simple machining. And, by producing a mold using this electrode, maintenance and management of the mold is easy.

Embodiment 3 FIG.
In the first and second embodiments, the shape of the engagement pins 53a, 53b, and 53c of the disk guide members 10 and 20 and the disk holding member 50 is devised. A device is added to the holding member 50 itself. FIG. 14 is a plan view of the disk holding member 50 according to the third embodiment. The disk holding member 50 is integrally formed with a spring member 56 and a round hole 56 a provided at the center of the spring member 56. A disc axis alignment member 51 for holding the disc, and part of the outer edge portion of the spring member 56 is separated into a T-shape, and both sides of the T-shape are bent in the same direction to form a disc guide member. The interval between the stacked and held disks (not shown) is maintained. A plurality of engagement pins 53a, 53b, 53c are formed on the inner surface of the disk axis alignment member 51 at substantially equal intervals.

  In this third embodiment, when the disc shaft alignment member 51 is outsert-molded with a synthetic resin in the center hole of the spring member, the spring member is kept at substantially equal intervals as a retaining against the shrinkage of the synthetic resin during the molding process. A plurality of holes 56 a are formed, and synthetic resin on the front and back sides of the spring member is wound through the holes 56 a to prevent the synthetic resin from peeling from the spring member 56.

  However, in the third embodiment, no holes are provided in the positions A, B, and C of the spring member 56 corresponding to the engagement pins 53a, 53b, and 53c, and the holes correspond to the engagement pins 53a, 53b, and 53c. The synthetic resins at the positions A, B, and C to be contracted tend to shrink toward the center of the disk axis alignment member 51. As a result, when the engaging pins 53a, 53b, and 53c are engaged with the spiral groove of the disc guide member 50, the engaging pins 53a, 53b, and 53c move in a direction that eliminates the clearance from the groove bottom. However, since the thickness of the synthetic resin is small, the portions A, B, and C have elasticity in the expanding direction, so that the clearance between the groove bottom and the engagement pins 53a, 53b, and 53c is constantly elastically pinched. I can leave.

  Thereby, the holding posture of the disk can be stabilized without using a separate member, and since there is an elastic engagement, there is an effect that the dimensional accuracy in the radial direction does not need to be so severe. In addition, this elastic engagement can hold back even if wear occurs at the end of the engagement pin, can cope with changes in shape such as wear, and is effective in changing the amount of play due to temperature changes. In the illustrated example, the urging force of the engaging pins 53a, 53b, and 53c toward the center is obtained by utilizing the contraction of the synthetic resin, but this urging force can also be obtained by using another elastic member. .

  Hereinafter, a disk holding device to which the disk holding members 10 and 20 and the disk guide member 50 obtained in the first to third embodiments are applied will be described. As shown in FIG. 15, the disk holding device 1 is roughly divided into four components, and a part thereof is fixed to the ceiling portion of the housing 2, and is rotated by a driving force of a driving source (described later). A first mandrel mechanism 100 that can be arranged, and a second mandrel mechanism 200 that is partly fixed to the bottom of the housing 2 and can be rotated by a driving force of a driving source (described later). A third mandrel mechanism 300 which is disposed so as to fit inside the second mandrel mechanism 200 and is movable in the direction of the rotation axis in accordance with the rotation operation of the second mandrel mechanism 200, and the first mandrel mechanism 100 and a third mandrel mechanism 300, and a donut having a protrusion formed on the inner peripheral portion that can be engaged with a groove formed in the first mandrel mechanism 100 and a groove formed in the third mandrel mechanism 300. And a disk-like disk insertion mechanism.

  The first mandrel mechanism 100 has one end attached to the top plate of the housing 2 and a rotatable first disc guide member 110 (three embodiments) having three helical grooves 112 to 114 formed on the outer peripheral edge. 1 to 3), and a ring-shaped compression spring member 120 is disposed inside the first disk guide member 110, and the first disk guide member is provided by the compression spring member. 110 is urged in the A direction. One end of each of the three spiral grooves 112 to 114 is open to the end surface of the first disk guide member 110.

  Also, a first holder 130 formed in a hollow shape is provided so as to guide the first disc guide member 110 at the inner periphery, and a part of the first disc guide member 110 is used as a top plate of the housing 2. By fixing, the first disk guide member is held in the housing 2. Here, three slits 132 to 134 are formed in the first holder 130 at equal intervals along the axial direction, and the opening surfaces of these slits 132 to 134 are openings 132a to 134a.

  Next, the second mandrel mechanism 200 is housed in the second holder 210 having one end abutting against the bottom surface of the housing 2 and having a hollow interior, and the other end is housing. 2 and a shaft member 220 as a rotation axis of a second disk guide member 230 (described later), and the shaft member 220 is loosely fitted inside as a rotation axis, and three spirals are formed on the outer peripheral surface portion. When the second disk guide member 230 formed with the grooves 231 to 233 and the third disk guide member 330 (corresponding to the disk guide member 20 in the first to third embodiments) are connected to the first disk guide member 110. The second disc guide member 230 is screwed so as not to be detached from the other end of the shaft member 220.

  Further, when the shaft member 220 is housed in the third disk guide member 330, the shaft member 220 is locked inside the third disk guide member 330 so that it does not protrude upward. On the other hand, when the third disc guide member 330 is connected to the first disc guide member 110, the shaft member 220 rises upward, and the engagement with the third disc guide member 330 is released when the shaft member 220 rises. Further, the second disk guide member 230 is screwed with a screw 260, but is rotatable with the shaft member 220 as a rotation axis.

In addition, a protrusion 212 protruding upward is formed on the bottom surface of the second holder 210, and this protrusion 212 is the inner peripheral portion of the disk when the disk is supported at the lowest level. The disk is supported by contacting the disk, and the tilt and swing of the disk are regulated.
Here, the second disk guide member 230 has a gear 234 at the end on the bottom surface side of the housing 2, and this gear 234 is interlocked with a transmission mechanism of a disk loading / unloading mechanism (not shown). In addition, six slits 211 to 216 are formed in the second holder 210 at equal intervals along the axial direction.

  Next, the third mandrel mechanism 300 is formed in a hollow shape, and three protrusions 302 to 304 are formed at equal intervals on the inner peripheral edge, and 3 at equal intervals along the axial direction on the outer peripheral edge. It has the 3rd holder 301 in which the slit of this was formed. The slits 214 to 216 of the second holder 210 guide the guide portion of the third holder 301 and are configured to move the third holder 301 in the rotation axis direction.

  Further, the third holder 301 is formed with three protrusions 311 to 313 at equal intervals on the top plate side end of the housing 2. When the third holder 301 moves in the rotation axis direction, the first holder The claw portions 314 to 316 are formed so as to be engaged with the respective recess portions 130 and cut out at a part of the outer peripheral surface. Here, the protrusions 302 to 304 formed on the inner peripheral edge are slidably engaged with the grooves 231 to 233 of the second disk guide member 230, and interlocked with the rotation operation of the second disk guide member 230. The third holder 301 can be moved in the rotation axis direction.

Further, a third disk guide member 330 that is loosely fitted inside the third holder 301 and has concentric grooves 331 and spiral grooves 332 to 334 formed on the outer peripheral surface portion is provided. This third disk guide member Opened at the housing ceiling side end of the spiral grooves 332 to 334 of the 330, these opening surfaces are the first disk guide member 110 when the third mandrel mechanism 300 and the first mandrel mechanism 100 are connected. The spiral grooves 112 to 114 are in communication with the opening surfaces of the grooves 112 to 114.
The third mandrel mechanism 300 is formed in a hollow shape, and is configured such that the second disc guide member 230 is loosely fitted therein, and the third mandrel according to the rotation operation of the second disc guide member 230. The mechanism 300 is configured to move in the rotation axis direction.

  With this configuration, the third disc guide member 330 can be rotated so as not to be detached from the third holder 301. Further, the third holder 330 is provided with three protrusions 335 to 337 that protrude toward the ceiling surface at the end on the ceiling surface side of the housing 2 at equal intervals.

  Further, when the third disk guide member 330 moves in the direction of the rotation axis together with the third holder 301 based on the rotation operation of the second disk guide member 230 and moves toward the ceiling surface side of the housing 2, Protrusions 335 to 337 formed on the disk guide member are configured to be fitted and connected to the recesses of the first disk guide member 110. Here, when the third disk guide member 330 and the first disk guide member 110 are connected, the rotation of the gear 234 formed on the second disk guide member 230 is stopped and the first disk guide member 110 is fitted. The rotating operation of the gears is performed. In this case, the first disk guide member 110 and the third disk guide member 330 are integrated and rotate while being integrated. At this time, there is no movement in the direction of the rotation axis.

  A disk holding member 50 (corresponding to the disk holding member 50 in the first to third embodiments) is a spring member and a disk axis alignment member for holding a disk integrally formed in a round hole provided at the center of the spring member. 51, part of the outer edge of the spring member is separated into a T-shape, and both sides of the T-shape are bent in the same direction so as to maintain the interval between the discs stacked and held on the disc guide member. It has become. A plurality of engagement pins are formed at substantially equal intervals on the inner surface of the disk axis alignment member 51.

Next, the principle of changing the height of the disc will be described with reference to FIGS.
FIG. 16 shows a state in which the first disk R is inserted and conveyed to the disk holding position. At this time, the first and third disk holding members 110 and 330 are moved up and down as shown in FIG. Are separated. FIG. 17 shows a state in which the third disk R is inserted and transported to the disk holding position. At this time, the first and third disk holding members are separated vertically. In FIG. 18, the third disk R is held while holding the disk holding member and pressed against the upper disk holding member, and in this example, the third disk is lifted upward and brought into contact with the second support member.

  In FIG. 19, the third disk guide member 330 is raised while the first disk holding member is pressed upward, that is, the third disk R is pressed against the second spacer to hold the third disk R. . At this time, the protruding portion protrudes upward. In FIG. 20, when the third disc guide member 330 is connected to the first disc guide member 110, first, the protruding portion comes into contact with and engages with the engaging portion of the first disc guide member 110. Thereby, the 3rd disc guide member 330 and the 1st disc guide member 110 shift to connection connection.

  Next, as shown in FIG. 21, the third disk guide member 330 is connected to the first disk guide member 110 to complete the disk protection operation. FIG. 22 shows a state when the sixth disk R is selected, and the sixth disk is lifted up to a predetermined height held by the disk holding mechanism by the operation of the third disk guide member 330.

FIG. 3 is a front view showing a cylindrical disk guide member in the first embodiment. It is an enlarged front view of a part of three spiral grooves. It is sectional drawing of this helical groove | channel, (a) is sectional drawing of a horizontal groove | channel with a cross-sectional U shape without a gradient, (b) is sectional drawing of the inclined groove | channel with a sloping cross-section inside. It is sectional drawing of a metal mold | die, (a) is sectional drawing of the metal mold | die which forms a horizontal groove | channel of a cross-sectional U shape, (b) is sectional drawing of the metal mold | die which forms the inclination groove | channel with a slanting cross-section depth. is there. It is a top view which combined the metal mold | die in cylindrical shape. It is a top view of the state which assembled | attached the disc holding member to the disc guide member. It is a longitudinal cross-sectional view which follows VII-VII of FIG. It is an expanded sectional view of the state where the engagement pin of the disk holding member was engaged with the spiral groove of the disk guide member. It is a cross-sectional view showing a modification of the engagement pin. FIG. 6 is a longitudinal sectional view showing an electrode for electric discharge machining for producing a mold in a second embodiment. It is a longitudinal cross-sectional view of the metal mold | die created with the electrode. It is a longitudinal cross-sectional view which shows the disc guide member which is a molded article shape | molded with the metal mold | die of FIG. It is a top view of the state which assembled | attached the disc holding member to the disc guide member. 6 is a plan view of a disc holding member according to Embodiment 3. FIG. It is a disassembled perspective view of a disk protection apparatus. It is an operation state transfer diagram explaining the operation state of the disk protection device. It is an operation state transfer diagram explaining the operation state of the disk protection device. It is an operation state transfer diagram explaining the operation state of the disk protection device. It is an operation state transfer diagram explaining the operation state of the disk protection device. It is an operation state transfer diagram explaining the operation state of the disk protection device. It is an operation state transfer diagram explaining the operation state of the disk protection device. It is an operation state transfer diagram explaining the operation state of the disk protection device.

Explanation of symbols

  10 Disc guide member, 11a, 11b, 11c Spiral groove, 20 Disc guide member, 21a, 21b, 21c Spiral groove, 50 Disc holding member, 51 Disc centering member, 53a, 53b, 53c Engaging pin, X Concentric circular part, Y inclined part.

Claims (5)

A disk centering member is integrally formed around the donut-shaped central hole, and a plurality of engaging pins that are tapered on the inner peripheral surface of the disk centering member and are tapered from the middle toward the tip are provided on the inner peripheral surface of the disk centering member. A disk holding member protruding at substantially equal intervals;
A concentric circular part and an inclined part are continuously formed on the outer peripheral surface to form a groove in which the engaging pin engages in a spiral shape, the concentric circular part is a horizontal groove having no gradient, and the inclined part is directed toward the groove bottom. A disk holding device comprising: a disk guide member configured as a tapered inclined groove. A disk centering member is integrally formed around the donut-shaped central hole, and a plurality of engaging pins that are tapered on the inner peripheral surface of the disk centering member and are tapered from the middle toward the tip are provided on the inner peripheral surface of the disk centering member. A disk holding member protruding at substantially equal intervals;
A concentric circular part and an inclined part are continuously formed on the outer peripheral surface to form a groove in which the engaging pin is engaged, and the entrance part of the concentric circular part is a horizontal groove without a gradient from the middle toward the groove bottom. A disk holding device comprising: a disk guide member that is a tapered inclined groove, and the inclined portion includes only an inclined groove that is continuous with the inclined groove of the concentric circular portion. A disc centering member is integrally formed around the donut-shaped central hole, and a plurality of engaging pins that taper and incline toward the tip are provided at substantially equal intervals on the inner peripheral surface of the disc centering member. And a disk holding member that uniformly applies a biasing force toward the center to each engagement pin;
A disc guide member in which a concentric circular part and an inclined part are continuously formed on an outer peripheral surface to form a groove in which the engaging pin engages in a spiral shape, and the groove is an inclined groove tapered toward the groove bottom from the entrance part. And a disk holding device.   Synthetic resins on the front and back sides are communicated through a hole provided around the center hole of the disk holding member, and a disk axis alignment member is integrally provided around the center hole. 4. The disk holding device according to claim 3, wherein an engagement pin is provided on a peripheral surface, and a biasing force toward the center of the disk axis alignment member is applied to the engagement pin by a contraction force of the synthetic resin.   The outer peripheral surface of the disc guide member is divided by the number of engaging pins, and a concentric circular portion and an inclined portion are continuously provided for each of the divided regions, and a groove is formed in a spiral shape on the outer peripheral surface of the disc guide member. The disk holding device according to any one of claims 1 to 3.

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