JP2003242738A - Automatic hub calking device and hub calking method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic hub calking device and a hub calking method capable of improving the manufacturing efficiency of a hub and highly accurately stabilizing the calking state of a metallic hub M to a resin hub R. <P>SOLUTION: The automatic hub calking device is provided with a metallic hub positioning unit 2, a resin hub positioning unit 3, an insertion unit 4 for incorporating the positioned resin hub R and metallic hub M, a first calking unit 7 for simultaneously hitting all upright leg parts 210 of the metallic hub M in a work after incorporating the resin hub R and bending them to the inner side obliquely at the angle of about 45 degrees, and a second calking unit 8 for simultaneously hitting all the bent leg parts 210 of the metallic hub M in the work after preliminary calking and bending them to be flat. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic hub crimping device and a hub crimping method for a hub itself attached to a center hole of a disk, and more particularly to a technique for automatically crimping a metal hub to a resin hub.

[0002]

2. Description of the Related Art In order to clamp a recording medium such as an optical disc on a spindle shaft of a drive device, a hub H is attached to a center hole 900 of a disc body D as shown in FIG. In this hub H, a metal hub M for magnetically attracting the magnet portion of the spindle shaft is arranged on the surface side of the resin hub R.

As shown in FIG. 10, the resin hub R is
The main body 110 has a convex portion 120 in the center on the back surface side and four notches 111 on the outer peripheral edge, and the metal hub M corresponds to the notches 111 of the resin hub R and the flat plate portion 220. Has four legs 210 on the outer peripheral edge thereof. In addition, both the resin hub R and the metal hub M have a central hole 12 into which the shaft of the spindle shaft is inserted.
The metal hub M is provided with positioning recesses 211 at four positions between the legs 210. Then, the upright four leg portions 210 of the metal hub M are crimped so as to be held on the back surface side of the resin hub R via the four notch portions 111 of the resin hub R, thereby making the hub shown in FIG. It becomes H. In manufacturing the hub H, it is preferable in terms of manufacturing efficiency to realize a series of processes such as component supply, caulking, and inspection by an automatic machine.

[0004]

However, since the optical disk is rotated at a high speed in the drive device, it is necessary to accurately perform clamping by the spindle shaft. Particularly, the metal hub M magnetically attracted to the magnet portion of the spindle shaft. It is necessary that the mounting state of the resin on the resin hub R is stable with high accuracy.

However, the four legs 210 of the metal hub M are
When the punches are crimped one by one, the metal hub M is displaced due to the load during crimping, and the leg portions 210 that cannot be crimped firmly to the resin hub R come out. Further, if the four legs 210 of the metal hub M are simply swaged at once by punching, the load applied to the metal hub M at the time of swaging may become uneven, and the metal hub M itself may be deformed into an R shape. is there. Furthermore, even in the inspection after crimping,
If the metal hub M is caulked without floating with respect to the resin hub R, or if all the leg portions 210 are firmly caulked with the resin hub R, the inspection efficiency is not good if the inspection is performed separately.

In view of the above circumstances, it is an object of the present invention to realize an automatic hub caulking device and a hub caulking method which are highly efficient in manufacturing a hub and can stabilize the caulking state of a metal hub with respect to a resin hub with high accuracy. .

[0007]

(1) An automatic hub crimping device according to the present invention (claim 1) has a structure in which a metal hub is arranged on the surface side of a resin hub as a hub to be attached to a disk center hole. An automatic hub crimping device for crimping a plurality of upright legs provided on the outer peripheral edge of the resin hub so as to wrap around the resin hub through a plurality of notches provided on the outer peripheral edge of the resin hub. A unit for positioning the metal hub, the unit having a positioning pin for simultaneously contacting a plurality of recesses provided on the outer peripheral edge of the metal hub, and a unit for positioning the resin hub And a resin hub positioning unit having a positioning pin for simultaneously abutting a plurality of notches provided on the outer peripheral edge of the resin hub, and the resin hub after the positioning. An insertion unit that incorporates the metal hub after the positioning, the insertion unit having a grip portion that grips the resin hub and moves the resin hub such that the cutout portions of the resin hub fit all the legs of the metal hub, A unit for preliminary crimping which simultaneously strikes all the upright legs of the metal hub in the work after insertion and bends it diagonally inward, and a pin portion which can be inserted into the center hole of the resin hub and the metal hub in the work. , A punch portion having a tip surface facing the upright leg portion of the metal hub and forming an inwardly inclined punch surface, and an advance / retreat drive for moving the punch portion so as to be able to strike the upright leg portion of the metal hub. The first crimping unit having a portion and all of the bent legs of the metal hub of the work after the preliminary crimping are simultaneously beaten to be flatly bent. A unit for crimping, a pin surface that can be inserted into the center holes of the resin hub and the metal hub in the above work, and a punch surface that is formed flat with the tip end surface facing the bent leg portion of the metal hub. And a second caulking unit having an advance / retreat drive unit for advancing the punch section so that it can be beaten with respect to the bent leg section of the metal hub.

In the automatic hub crimping device,
A transport unit for intermittently transporting the metal hub and the resin hub to be the work to each of the above units may be provided.

Further, in the above automatic hub crimping device,
A unit for inspecting a defective insertion of a work after the metal hub and the resin hub are assembled by the insertion unit,
An insertion inspection unit having a visual sensor for confirming the height of the work after the assembling may be provided.

Further, in the automatic hub caulking device, the second caulking unit is a unit for inspecting a caulking defect of a work after the caulking, which is a conductive inspection stage for mounting the work with the metal hub side facing down. ,
Further, an inspection unit having a conductive probe may be provided which is brought into contact with the work from the resin hub side and simultaneously performs the work height check and the continuity check at the time of contact.

(2) In the hub crimping method according to the present invention (claim 2), the metal hub is arranged on the surface side of the resin hub as a hub to be attached to the disk center hole, and the upright provided on the outer peripheral edge of the metal hub. A hub crimping method in which a plurality of legs are crimped so as to be held on the back side of the resin hub through a plurality of cutouts provided on the outer peripheral edge of the resin hub. A metal hub positioning step of positioning the metal hub by simultaneously contacting the positioning pins with the plurality of recesses, and simultaneously contacting the positioning pins with the plurality of notches provided in the outer peripheral edge of the resin hub. The resin hub positioning step of positioning the resin hub, and the resin hub after the positioning is gripped and moved by the gripping portion so that the cutout portion of the resin hub is located in the metal hub after the positioning. And the metal part is inserted by inserting the pin into the center hole of the resin hub and the metal hub of the work after the resin hub has been installed. Preliminary caulking process of striking all the upright legs of the hub at the same time and bending it diagonally inward, and forming flat with the pin portion inserted in the center hole of the resin hub and the metal hub in the work after the above-mentioned preliminary caulking A crimping process of simultaneously striking all the bent legs of the metal hub with a punch having a punch surface to bend the legs flat.
It is characterized by including.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. The work in this embodiment is the hub H attached to the center hole 900 of the disc body D (see FIG. 9).
See. ), A resin hub R having a convex portion 120 in the center of the back surface side and four notches 111 at the outer peripheral edge, and legs at four locations on the outer peripheral edge of the flat plate portion 220 corresponding to the notch portions 111 of the resin hub R. It is composed of a metal hub M having a portion 210 and four recesses 211 provided between the leg portions 210 (see FIG. 10). Both the resin hub R and the metal hub M have central holes 121 and 221 into which the shaft of a spindle shaft in a disk drive device or the like is inserted.
Then, the automatic hub crimping device and the hub crimping method of the present invention hold the four upright legs 210 of the metal hub M on the back surface side of the resin hub R via the four notches 111 of the resin hub R. This is for crimping to obtain the hub H shown in FIG.

FIG. 1 is a schematic view showing an entire automatic hub crimping device according to an embodiment. As shown in FIG. 1, the entire structure of the automatic hub caulking device is as follows.
Rotating table 10 (transport unit), metal hub supply parts feeder P1, resin hub supply parts feeder P
2, metal hub positioning unit 2, resin hub positioning unit 3, insertion unit 4, insertion inspection unit 5, defective insertion ejection unit 6, first caulking unit 7, second caulking unit 8, inspection unit 9, work unloading unit 9
0 and a controller 100 for controlling the operation of these units.

The rotary table 10 is a device that intermittently conveys the metal hub M and the resin hub R, which are the workpieces, to the locations where the above-mentioned units are arranged. The rotary table 10 shown in FIG. 1 is driven to rotate intermittently in the clockwise direction. A chuck such as a vacuum or an electromagnet is provided at the place where the metal hub M is placed on the rotary table 10, and the metal hub M is fixed on the rotary table 10 by this chuck.

The metal hub supplying parts feeder P1 is a device for rotating and moving a large number of metal hubs M that have been thrown in in the outer peripheral direction while vibrating, and feeding the metal hubs M one by one to the next metal hub positioning unit 2. . A selection pin 26 as shown in FIG. 2 is provided near the outlet of the metal hub supply parts feeder P1.
By passing the metal hub M to the installation place of, only the metal hub M with the leg portion 210 facing upward is selected. That is, as shown in FIG. 2B, in the front-faced metal hub M in which the leg portions 210 face downward, the flat plate portion 220 has the selection pins 26.
It is caught on the leg and flipped, but as shown in Fig. 2 (a), the leg 2
This is because the metal hub M in which 10 is facing up and passes through without being repelled by the sorting pin 26.

The metal hub positioning unit 2 is a device for positioning the leg portion 210 of the metal hub M so as to face a predetermined position and sending it to the rotary table 10, and a mounting stage 20 for the metal hub M, It has a slider part 21 that reciprocates between the metal hub supply parts feeder P1 and the rotary table 10, and a slider drive part 22 that drives this slider part 21. Further, the slider portion 21 is
It has first to third arm portions 23, 24, 25. Each of the first to third arm portions 23, 24, 25 has a gripping mechanism for the metal hub M.

The metal hub supply parts feeder P
First, the metal hub M supplied from the first mounting stage 2
The orientation of the leg portion 210 is checked by a visual sensor (not shown) while being rotated once in the plane direction on 0, and at this time, the metal hub M is roughly positioned. The metal hub M after being positioned is moved to an adjacent place on the mounting stage 20 by the first arm portion 23. In addition, the second arm 2
4, the positioning pins 241a to 241a corresponding to the four recesses 211a to 211d provided on the outer peripheral edge of the metal hub M and abutting simultaneously with these recesses 211a to 211d. 241d. By lowering the positioning pins 241a to 241d of the second arm portion 24 and simultaneously bringing the positioning pins 241a to 241d into contact with the four recesses 211a to 211d on the outer peripheral edge of the metal hub, the leg portion 210 of the metal hub M is moved. Positioning is performed so as to face a fixed position. The metal hub M after the positioning of the leg portion 210 is moved to the next place on the mounting stage 20 by the second arm portion 24. Then, the third arm portion 25 grips the positioned metal hub M and moves it onto the rotary table 10. In addition, the above-mentioned 1st-3rd arm part 2
Since 3, 24 and 25 are integrated as the slider part 21, the first to third parts are driven as the slider part 21 is driven.
The operations of the arm portions 23, 24, 25 are synchronously performed.

The resin hub supply parts feeder P2 is a device for rotating and moving a large number of the resin hubs R, which have been put in, in the outer peripheral direction while vibrating the resin hubs R one by one and sending them to the next resin hub positioning unit 3. is there. A selection pin 36 as shown in FIG. 4 is provided in the vicinity of the outlet of the resin hub supply parts feeder P2. By passing the resin hub R to the installation location of the selection pin 36, the convex portion 1 is formed.
Only the resin hubs R with the 20 facing up are selected. That is, as shown in FIG. 4B, the main body 110 of the resin hub R facing upward with the convex 120 facing downward has the selection pin 36.
Although it is caught by and is repelled by the convex portion 1 as shown in FIG.
This is because the resin hub R with 20 facing upwards passes through without being repelled by the selection pin 36.

The resin hub positioning unit 3 is a device for positioning the cutout portion 111 of the resin hub R so as to face a predetermined position and sending the resin hub to the insertion unit 4. It has a slider part 31 that reciprocates between the resin hub supply parts feeder P2 and the rotary table 10, and a slide drive part 32 that drives this slider part 31. Further, the slider portion 31 is
It has first to third arm portions 33, 34, and 35. Each of the first to third arm portions 33, 34 and 35 has a gripping mechanism for the resin hub R.

The parts feeder P for supplying the resin hub
First, the resin hub R supplied from
The orientation of the cutout portion 111 is checked by a visual sensor (not shown) while rotating once in the plane direction on 0, and at this time, the resin hub R is roughly positioned. The resin hub R after being positioned is moved to an adjacent position on the mounting stage 30 by the first arm portion 33. Further, as shown in FIG. 5, the second arm portion 34 is provided corresponding to the four cutout portions 111 a to 111 d provided on the outer peripheral edge of the resin hub R, and abuts on these cutout portions 111 at the same time. It has positioning pins 341a to 341d. This second arm part 3
4 positioning pins 341a to 341d are lowered so that the positioning pins 34 are simultaneously inserted into the plurality of notches 111 of the resin hub R.
Positioning is performed so that the cutouts 111a to 111d of the resin hub R face a fixed position by bringing the 1a to 341d into contact with each other. The resin hub R after the positioning of the cutout portion 111 is mounted on the mounting stage 30 by the second arm portion 34.
Moved to the next place above. Then, the third arm portion 35
Grips the positioned resin hub R and inserts the insertion unit 4
Move to. The above-mentioned first to third arm portions 33, 34,
Since 35 is integrated as the slider portion 31,
As the slider portion 31 is driven, the first to third arm portions 3
The operations of 3, 34 and 35 are synchronously performed.

The insertion unit 4 is a device for incorporating the resin hub R, which is positioned and mounted on the metal hub M placed on the rotary table 10, and has a grip portion 41 that grips the resin hub R and moves up and down. . This insertion unit 4
The resin hub R is assembled into the metal hub M on the rotary table 10 by the grip portion 41 so that the cutout portions 111 are all fitted into the leg portions 210 of the metal hub M.

The insertion inspection unit 5 is a device for inspecting a defective insertion of the work after the assembly, and has a visual sensor 51 for confirming the height of the work after the resin hub R is installed in the metal hub M. The visual sensor 51 determines that the work whose height is higher than the reference height is defective in the insertion of the resin hub R, and issues a discharge instruction in the next defective insertion discharge unit 6.

The defective insertion discharge unit 6 is a device for discharging a defectively inserted work from the rotary table 10, and has a discharge arm 61 that reciprocates between the rotary table 10 and the defective insertion receiving box 62. The ejection arm 61 picks up the defective work found in the insertion inspection unit 5 and inserts it from the rotary table 10 into the defective insertion box 62.

The first caulking unit 7 is a device for pre-caulking that simultaneously strikes all the upright legs 210 of the metal hub M in the work and bends them inwardly. The first caulking unit 7 is, as shown in FIG.
A cylindrical punch portion 71 along the outer peripheral shape of the work, a pin portion 74 accommodated in a central concave portion 72 provided from the tip surface of the punch portion 71, an air type or a hydraulic type for moving the punch portion 71 up and down, and the like. Cylinder 76 (advancing / retreating drive section).

The punch portion 71 has a front end surface around the central recess 72 as a punch surface 73 that faces all the upright legs 210 of the metal hub M and is inclined inward. The punch portion 71 strikes all the upright leg portions 210 of the metal hub M of the work at the same time on the punch surface 73 when swaging.
The legs 210 are bent inward at an angle of about 45 degrees. The pin portion 74 is suspended by a spring 75 attached to the bottom surface of the central recess 72, and is slidably attached to the central recess 72. The pin portion 74 has a tip portion 74 when crimping.
1 is the center hole 12 of the resin hub R and the metal hub M of the workpiece
Since it is inserted into the first and second parts 221 and the base end portion 742 presses the work from above, movement of the work and displacement / floating of the metal hub M are suppressed. The cylinder 76 moves the punch section 71 so that it can strike the upright leg section 210 of the metal hub M when swaging.

The second caulking unit 8 is a bent leg portion 2 of the metal hub M in the work after the above-mentioned preliminary caulking.
This is a device for crimping all 10 at the same time and bending them flatly. This second caulking unit 8 is shown in FIG.
As shown in FIG. 5, a cylindrical punch portion 81 along the outer peripheral shape of the work, a pin portion 84 accommodated in a central recess 82 provided from the tip end surface of the punch portion 81, and air for moving the punch portion 81 up and down. Type or hydraulic type cylinder 86
(Advancing / retreating drive unit).

The punch portion 81 has all the bent leg portions 210 of the metal hub M on the front end surface around the central concave portion 82.
The punch surface 83 is formed to be flat and opposed to the punch surface 83. The punching portion 81 simultaneously strikes all the bent leg portions 210 of the metal hub M of the workpiece on the punching surface 83 during crimping, and bends these leg portions 210 flat. As a result, the four upright legs 210 formed on the outer peripheral edge of the metal hub M are held on the back surface side of the resin hub R via the four cutouts 111 provided on the outer peripheral edge of the resin hub R. Can be crimped. The pin portion 84 is suspended by a spring 85 attached to the bottom surface of the central concave portion 82, and is slidably attached to the central concave portion 82. This pin 8
No. 4 is a resin hub R whose tip portion 841 is a work during crimping.
Further, since it is inserted into the center holes 121 and 221 of the metal hub M and the base end portion 842 presses the work from above, movement of the work and displacement and floating of the metal hub M are suppressed.
The cylinder 86 moves the punch portion 81 so that it can strike the bent leg portion 210 of the metal hub M when swaging.

The inspection unit 9 is an apparatus for inspecting the caulking defect of the work after the caulking. This inspection unit 9 is arranged adjacent to the rotary table 10, and as shown in FIG. 8, a conductive inspection stage 96 for mounting a work with the metal hub M side facing down, and a resin hub R for the work. And a conductive probe 95 abutted from the side. The inspection unit 9 inspects a work for caulking defects by simultaneously performing a height check and a continuity check when the probe 95 is brought into contact with the work.

That is, when there is no caulking defect, the leg portion 210 of the metal hub M is in close contact with the back surface of the resin hub R, so that the probe 95 contacts the convex portion 120 of the resin hub R.
The work height d determined by the height check at this time is substantially equal to the height of the resin hub R. The work height d is determined by measuring the distance between the tip of the probe 95 and the inspection stage 96 by the amount of movement of the probe 95 or the like. In addition, in the conduction state A obtained by the conduction check, the non-conduction state is detected because the leg portion 210 of the metal hub M does not contact the probe 95 when there is no caulking defect. In addition, the continuity check is performed in the inspection stage 9
Since both 6 and the probe 95 are conductive, it is determined whether or not a current flows between the inspection stage 96 and the probe 95 through the work.

On the other hand, when there is a caulking defect, the metal hub M
Since the leg portion 210 of FIG. 8 is in a substantially upright state or in a floating state, the probe 95 comes into contact with the leg portion 210 of the metal hub M (see the leg portion 210 'indicated by the one-dot chain line in FIG. 8). The work height d determined by the height check at this time is higher than the height of the resin hub R. Further, the conduction state A by the conduction check is detected because the leg portion 210 of the metal hub M contacts the probe 95.

Although the tip of the probe 95 is formed to be flat, the outer peripheral area of the tip surface of the probe 95 that does not come into contact with the convex portion 120 of the resin hub R is a leg 2 in a good work.
You may form the protrusion part of the height which does not contact 10. That is, in the example shown in FIG.
Since there is no great difference between the thickness of the metal hub M and the thickness of the metal hub leg 210, the probe 95 will almost certainly come into contact with the leg 210 of the metal hub M if the leg 210 of the metal hub M floats due to a caulking defect. In the work in which there is a certain height difference between the thickness of the resin hub convex portion 120 and the thickness of the metal hub leg portion 210, even if there is a caulking defect, the probe 95 uses the metal hub M.
May not come into contact with the legs 210 of the. Therefore, if a protrusion is formed in the outer peripheral region of the tip surface of the probe 95, even if the work causes a certain height difference between the thickness of the resin hub protrusion 120 and the thickness of the metal hub leg 210, the metal hub will not be caulked. It is possible to reliably detect the floating of the M leg 210.

The work take-out unit 90 transfers the work after crimping from the rotary table 10 to the inspection stage 96, and the work after inspection from the inspection stage 96 to the non-defective box 9.
71 or a defective product receiving box 972. The work taking-out unit 90 has a slider part 91 having first and second two arm parts 93 and 94 and reciprocating, and a slider driving part 92 for reciprocating the slider part 91. The first arm portion 93 of the slider portion 91 grips the work on the rotary table 10 and the second arm portion 9
4 grips the work on the inspection stage 96, slides the slider portion 91 in this state, places the work held by the first arm portion 93 on the inspection stage 96, and holds the work by the second arm portion 94. Is opened to either the ejection chute 97 or 98 attached to the non-defective product receiving box 971 or the defective product receiving box 981.

(Explanation of Operation) Next, an operation of the automatic hub caulking device or a hub caulking method will be described. The operation of each unit described below is controlled by a control command signal from the controller 100.

First, the metal hub supply parts feeder P1
Only the metal hub M turned over so that the leg portions 210 face upward is supplied to the metal hub positioning unit 2. In the metal hub positioning unit 2, the metal hub M is rotated once to substantially position the leg 210, and then the positioning pins 241a to 241d are brought into contact with the four recesses 211a to 211d at the outer peripheral edge at the same time to complete the positioning. It is positioned (see FIG. 3) and placed on the turntable 10. When the visual sensor 27 detects the metal hub M on the turntable 10, the turntable 10 is intermittently rotated clockwise. By positioning the metal hub M as described above, the positioning pin 241 can be surely brought into contact with the recess 211, and by positioning the positioning pin 241 with the four recesses 211 at the same time, positioning can be performed. Can be reliably performed.

Further, a parts feeder P2 for supplying a resin hub
The resin hub R turned upside down so that the protrusion 120 faces upward is supplied to the resin hub positioning unit 3.
In the resin hub positioning unit 3, the resin hub R is rotated once so that the direction of the cutout portion 111 is roughly positioned, and then the positioning pins 341a to 341d are moved to the cutout portion 111 at the outer peripheral edge.
It is brought into contact with a to 111d and completely positioned (see FIG. 5), and then sent to the insertion unit 4. Also in this case, the positioning pin 341 can be surely brought into contact with the notch 111 by positioning the resin hub R, and the positioning pin 341 can be brought into contact with the four notches 111 at the same time for positioning. Can be reliably performed.

Then, in the insertion unit 4, the grip 41 holding the resin hub R descends, and the notch 111 of the resin hub R is formed in the leg 210 of the metal hub M on the rotary table 10 directly below.
The resin hub R is incorporated into the metal hub M so that all of them are fitted. Since the metal hub M and the resin hub R are positioned by the positioning units 2 and 3, the insertion unit 4 does not need to perform relative positioning between the metal hub M and the resin hub R again. Therefore, the structure of the insertion unit 4 can be simplified.

Next, when the rotary table 10 is rotated intermittently, the visual inspection sensor 51 inspects the insertion height of the resin hub R by the insertion inspection unit 5 by looking at the work height. When the insertion inspection unit 5 detects a defective insertion, when the rotary table 10 is intermittently rotated next time by the discharge arm 61 of the next defective defective discharge unit 6, the work is picked and inserted from the rotary table 10. Defective box 6
It is thrown in 2.

Then, when the rotary table 10 is intermittently rotated next, preliminary caulking of the upright leg portion 210 of the metal hub M in the work is performed by the first caulking unit 7. At the time of crimping, as shown in FIG.
The distal end portion 741 of the pin portion 74 slidably mounted in the central recessed portion 72 of No. 1 is inserted into the central holes 121 and 221 of the resin hub R and the metal hub M of the workpiece, and the proximal end portion 742 of the pin portion 74 allows the workpiece to move. Since the is pressed from above, the movement of the work and the displacement and floating of the metal hub M are suppressed. Moreover, since the punch portion 71 strikes all the upright leg portions 210 of the metal hub M of the work at the same time at the time of crimping, the bending load is evenly applied to all the leg portions 210. Moreover, since each leg 210 can be bent only up to about 45 degrees, the load applied to the metal hub M during crimping can be suppressed. As a result, the flat plate portion 220 of the metal hub M is not deformed into an R shape, and the leg portions 210 are all aligned and bent without displacement.

Next, when the rotary table 10 is intermittently rotated, the leg portion 210 bent by the preliminary crimping is crimped flat by the second crimping unit 8. Even at this crimping time, as shown in FIG. 7, the tip end portion 841 of the pin portion 84 is inserted into the center holes 121 and 221 of the resin hub R and the metal hub M of the work and the base end portion 842 of the pin portion 84 is used. The work is pressed from above to prevent movement of the work and displacement / floating of the metal hub M, and the punch surface 83 strikes all the legs 210 at the same time so that the bending load is evenly applied to all the legs 210. Try to join. Further, since each leg 210 is bent to about 45 degrees by the above-mentioned preliminary caulking, it is possible to suppress the load applied to the metal hub M when caulking the leg 210 flatly. Therefore, the flat plate portion 220 of the metal hub M is not deformed in an R shape, and the leg portions 210 are all aligned and bent without displacement. When the caulking is completed by the second caulking unit 8, the four upright legs 210 provided on the outer peripheral edge of the metal hub M are connected to the resin hub R through the four notches 111 provided on the outer peripheral edge of the resin hub R. It is crimped so as to embrace on the back side of R.

Further, the hub caulking is performed in the two stages of the first caulking unit 7 and the second caulking unit 8 as described above, so that the bending load on the leg 210 at the time of caulking is gradually reduced and reduced. As a result, the deformation of the metal hub M can be reliably prevented, whereby the bending position of the metal hub M becomes stable and firm crimping is possible.

Next, when the rotary table 10 is intermittently rotated and the work after the crimping is moved to the work take-out unit 90, the slider portion 91 of the work take-out unit 90 moves the work after the crimping from the rotary table 10 to the inspection stage 96. Moved to. When the work is placed on the inspection stage 96, the inspection stage 96 rotates 180 degrees and the work is moved to the probe 95 side. Then, the probe 9
5 descends and is brought into contact with the front side of the work from the resin hub R side. At this time, the height of the work and the continuity check are simultaneously performed to inspect for caulking defects.

That is, as shown in FIG. 8, when there is no caulking defect, the leg portion 210 of the metal hub M is in close contact with the resin hub R, so that the probe 95 comes into contact with the convex portion 120 of the resin hub R. The work height d at this time is substantially equal to the height of the resin hub R. In the conductive state A, the non-conductive state is detected because the leg portion 210 of the metal hub M does not come into contact with the probe 95.

On the other hand, when there is a caulking defect, the leg portion 210 of the metal hub M is substantially upright or in a floating state, so that the probe 95 comes into contact with the leg portion 210 of the metal hub M (one point difference in FIG. 8). See leg 210 'shown in line.). The work height d at this time is higher than the height of the resin hub R.
In addition, the conduction state A is detected because the leg portion 210 of the metal hub M contacts the probe 95. However, when the legs 210 are slightly lifted, the work height d may be detected as the height of the resin hub R as in the case of a good product. However, even in this case, since the leg portion 210 of the metal hub M comes into contact with the probe 95, conduction is detected, and therefore the caulking defect is not overlooked. In this way, the work height check and continuity check are performed at one place at the same time, so inspection efficiency is good, and moreover, the double check of height and continuity makes it possible to reliably detect caulking defects, and it is possible to identify good and defective products. It is possible to surely prevent a situation in which

When the inspection for caulking defects is completed, the inspection stage 96 rotates 180 degrees, and then the take-out unit 9
The workpiece that has been inspected by the slider unit 91 of 0 is opened to either the ejection chute 97 or 98 attached to the non-defective product receiving box 971 or the defective product receiving box 981 based on the inspection result. This completes one operation of the automatic hub crimping device.

(Effects of the Embodiment) As described above, according to the above embodiment, it is possible to realize the automatic caulking of the hub composed of the resin hub R and the metal hub M. In the metal hub positioning unit 2, the metal hub M
Then, the positioning pin 241 can be surely brought into contact with the recess 211, and the positioning pins 241a to 241d can be brought into contact with the four recesses 211a to 211d.
The metal hub M can be surely positioned by simultaneously contacting with the metal hub M. Resin hub positioning unit 3
Also in the above, by positioning the resin hub R, the positioning pin 341 can be reliably brought into contact with the cutout portion 111, and the positioning pins 341a to 341d are connected to the four cutout portions 1.
Resin hub R by contacting 11a-111d at the same time
Can be reliably positioned.

Further, since the metal hub M and the resin hub R are positioned by the respective positioning units 2 and 3, the insertion unit 4 again performs relative alignment between the metal hub M and the resin hub R. You don't have to. Therefore,
The configuration of the insertion unit 4 can be simplified.

Further, both the first caulking unit 7 and the second caulking unit 8 are punched when the caulking is performed.
Since the pin portions 74 and 84 slidably attached to the central concave portions 72 and 82 of 1, 81 are inserted into the central holes 121 and 221 of the resin hub R and the metal hub M of the work and press the work from above, the caulking is performed. It is possible to suppress the movement of the work and the displacement and floating of the metal hub M during the operation. Moreover,
The punch portions 71 and 81 have punch surfaces 73 and 8 during crimping.
Since all the leg portions 210 of the metal hub M of the work are simultaneously beaten at 3, the bending load is evenly applied to all the leg portions 210. Then, by performing the hub caulking in two stages of the first caulking unit 7 and the second caulking unit 8, the bending load on the metal hub M at the time of caulking can be reduced stepwise. As a result, the deformation of the metal hub M can be reliably prevented, whereby the bending position of the metal hub M becomes stable and firm crimping is possible.

Further, in the inspection unit 9, since the work height check and the continuity check are simultaneously performed at one place, the inspection efficiency is good, and the double check of the height d and the continuity A ensures oversight of the caulking defect. Therefore, it is possible to reliably prevent a situation in which a good product and a defective product are mixed.

(Others) The present invention is not limited to the above-mentioned embodiment, and for example, in the first caulking unit 7 and the second caulking unit 8, one punch portion 71, 81 is provided. However, it is also possible to provide a plurality of punch portions having different inclination angles of the punch surface and strike the leg portions 210 of the metal hub M in multiple stages with these punch portions.

Further, the punch portion 71 of the first caulking unit 7 and the punch portion 81 of the second caulking unit 8 are provided.
Is an integral body that faces all four (plural) leg portions 210 of the metal hub M, but a plurality of punches corresponding to each of the four (plural) leg portions may be provided.

A second caulking unit 8 may be followed by a third caulking unit having the same structure as the second caulking unit 8 so that the leg portion 210 of the metal hub M can be hit twice. Thereby, the caulking can be further strengthened.

A detection sensor for detecting whether or not the work after crimping has been taken out from the rotary table 10 by the take-out unit 90 may be provided. As a result, it is possible to prevent forgetting to take out the work from the rotary table 10, and the work that has been completely crimped is not carried to the place where the metal hub M is placed with the work placed on the rotary table 10.

Further, the hub is, for example, an MO or a CD.
-R, CD-RW, CD (for music, etc.), DVD (for video, etc.) used as various media (recording medium), etc. (including surface recording / playback type disks), center of various disks Widely used for attaching holes.

[0054]

(1) According to the automatic hub crimping device according to the first aspect of the present invention, in the metal hub positioning unit, the positioning pin is brought into contact with a plurality of recesses of the metal hub at the same time to ensure the positioning. It can be carried out. Also in the resin hub positioning unit, the positioning can be surely performed by bringing the positioning pins into contact with the plurality of notches of the resin hub at the same time. Further, since the metal hub and the resin hub are positioned by the respective positioning units, the insertion unit does not need to perform relative positioning between the metal hub and the resin hub again. Therefore, the structure of this insertion unit can be simplified.

In both the first caulking unit and the second caulking unit, by inserting the pin portions into the center holes of the resin hub and the metal hub of the work, movement of the work and displacement / floating of the metal hub during caulking are performed. Etc. can be suppressed. Moreover, since the punching portion simultaneously strikes all the legs of the metal hub of the work at the time of crimping, the bending load is evenly applied to all the legs. Then, by performing the hub caulking in two stages of the first caulking unit and the second caulking unit, it is possible to reduce the bending load on the metal hub during caulking stepwise. As a result, the deformation of the metal hub can be reliably prevented, whereby the bending position of the metal hub is stabilized and firm crimping is possible.

In this way, it is possible to realize an automatic hub crimping device according to claim 1 of the present invention, which has a high hub manufacturing efficiency and can stabilize the crimping state of the metal hub with respect to the resin hub with high accuracy. You can

(2) According to the hub crimping method according to claim 2 of the present invention, in both the preliminary crimping step and the crimping step, the pin portion is inserted into the center hole of the resin hub and the metal hub of the workpiece so that the workpiece is crimped. It is possible to suppress movement and displacement and floating of the metal hub. Moreover,
Since the punch part strikes all the legs of the metal hub of the work at the same time at the time of crimping, the bending load is evenly applied to all the legs. Then, by performing the two-stage hub caulking in which the preliminary caulking process is performed before the caulking process, it is possible to reduce the bending load on the metal hub during caulking stepwise. As a result, it is possible to reliably prevent deformation of the metal hub, which stabilizes the bending position of the metal hub,
Firm crimping is possible.

As described above, also as the hub crimping method according to the second aspect of the present invention, it is possible to realize a hub crimping state of the metal hub with respect to the resin hub with high accuracy, with high hub manufacturing efficiency. You can

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an overall configuration of an automatic hub caulking device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram illustrating a method of selecting a metal hub with a selection pin in a metal hub supply parts feeder.

FIG. 3 is a perspective view showing a configuration of a positioning pin in the metal hub positioning unit.

FIG. 4 is a schematic diagram illustrating a method of selecting a resin hub with a selection pin in a resin hub supply parts feeder.

FIG. 5 is a perspective view showing a configuration of a positioning pin in the resin hub positioning unit.

FIG. 6 is a schematic diagram showing a configuration of a first caulking unit.

FIG. 7 is a schematic diagram showing a configuration of a second caulking unit.

FIG. 8 is a schematic diagram showing a configuration of an inspection unit.

FIG. 9 is a perspective view showing the relationship between the disc body and the hub being bonded together.

FIG. 10 is an exploded perspective view showing a resin hub and a metal hub as the configuration of the hub.

[Explanation of symbols]

1 Device Main Body 2 Metal Hub Positioning Unit 3 Resin Hub Positioning Unit 4 Insertion Unit 5 Insertion Inspection Unit 6 Poor Insertion Ejection Unit 7 First Caulking Unit 8 Second Caulking Unit 9 Inspection Unit 10 Rotating Table (Transporting Unit) 27 Metal Hub Confirmation Visual sensor 41 grasping portion 51 visual sensor for insertion inspection 71 punching portion on the side of the first caulking unit 72 central concave portion 73 on the side of the first caulking unit 73 punch surface on the side of the first caulking unit 74 on the side of the first caulking unit Pin portion 76 of the first caulking unit side cylinder (advancing / retracting drive portion) 81 Punching portion of the second caulking unit 82 Central recessed portion of the second caulking unit 83 Punch surface of the second caulking unit 84 Second caulking unit Pin part of the cylinder 86 Cylinder (advancing / retreating drive part) in the second caulking unit 90 Unit 96 Conductive inspection stage 95 Conductive probe 100 Controller 111 Resin hub cutout 210 Metal hub leg 241 Positioning pin (Metal hub positioning unit side) 341 Positioning pin (Resin hub positioning unit side) D Disk body H Hub M Metal hub R Resin hub

Continued front page    (72) Inventor Takehiko Kitamura             No.42 Gwangbuk North Road, Hsinchu Industrial Area, Houkou Township, Hsinchu County, Taiwan               ▲ Ki ▼ Takashi ▲ Min ▼ Co., Ltd.

Claims (2)

[Claims] 1. A structure in which a metal hub is arranged on the surface side of a resin hub as a hub to be attached to a disk center hole, and a plurality of upright legs provided on the outer peripheral edge of the metal hub are provided on the outer peripheral edge of the resin hub. An automatic hub crimping device for crimping so as to embrace on the back side of the resin hub through a plurality of notches, which is a unit for positioning the metal hub, and is provided on an outer peripheral edge of the metal hub. A metal hub positioning unit having a positioning pin that simultaneously abuts against a plurality of recesses, and a unit for positioning the resin hub, which simultaneously contacts a plurality of notches provided on the outer peripheral edge of the resin hub. A resin hub positioning unit having a positioning pin to be brought into contact, and a unit for assembling the above-mentioned positioned metal hub with the above-mentioned positioned metal hub. The insertion unit having a holding portion for holding and moving the resin hub so that the cutout portion of the resin hub fits all the leg portions of the metal hub and the upright leg portions of the metal hub in the work after the insertion are hit at the same time. A unit for pre-crimping that is bent diagonally inward, and is a pin portion that can be inserted into the center holes of the resin hub and the metal hub of the work, the tip surface of which faces the upright leg portion of the metal hub and A punch unit having a punch surface inclined in a direction, and a first caulking unit having an advancing / retreating drive unit for moving the punch unit so as to be able to strike the upright leg of the metal hub, and the work after the preliminary caulking. A unit for crimping by striking all the bent legs of a metal hub at the same time to fold it flatly, the resin hub and Punching unit for a pin portion capable Insert the central hole, the legs bent distal end surface of the metal hub and opposed and flat-formed punched surface of genus hub, and,
An automatic hub caulking device, comprising: a second caulking unit having an advancing / retreating drive unit for advancing the punch portion so as to be able to strike the bent leg portion of the metal hub. 2. A metal hub is arranged on the surface side of a resin hub as a hub to be attached to the disk center hole, and a plurality of upright legs provided on the outer peripheral edge of the metal hub are provided on the outer peripheral edge of the resin hub. A hub crimping method of crimping so as to embrace it on the back surface side of the resin hub through a plurality of notches, in which positioning pins are simultaneously brought into contact with a plurality of recesses provided in the outer peripheral edge of the metal hub. A metal hub positioning step of positioning the metal hub; a resin hub positioning step of positioning the resin hub by simultaneously contacting positioning pins with a plurality of notches provided on the outer peripheral edge of the resin hub; An inserting step of gripping and moving the resin hub after positioning so that the cutout portion of the resin hub fits all the leg portions of the metal hub after positioning; With the pin part inserted in the center hole of the resin hub and the metal hub in the work after the resin hub has been installed, strike all the upright legs of the metal hub at the same time with the punch part that has the punch surface inclined inward. A preliminary crimping step of bending diagonally inward, and with the pin portion inserted in the center hole of the resin hub and the metal hub in the work after the preliminary crimping, the metal hub is bent by the punch portion having a flat punch surface. And a step of crimping all of the legs at the same time to fold them flatly, and a hub crimping method.