JPH0780099B2 - Shaft insertion method and device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft insertion method and device in which a shaft perpendicular to a disk is fixed and which is fitted into a shaft hole opened upward.

PRIOR ART A typical prior art is shown in FIG. Fig. 21 (1)
, A shaft 2 is coaxially fixed to a disk 1 which functions as a flywheel, and the shaft 2 is inserted into a shaft hole 4 formed in a chassis 3 of a magnetic tape cassette reproducing apparatus by inserting the shaft 2. , The operator grips the disc 1 with the hand 5, fits the lower end of the shaft 2 into the shaft hole 4, and then removes the disc 1 from the hand 5 as shown in FIG. 21 (2). Then, the disc 1 and the shaft 2 drop by their own weight, and the shaft 2 and the shaft 2 are released into the shaft hole 4.
Is fitted.

Problems to be Solved by the Invention In such a prior art, the worker inserts the shaft 2 into the shaft hole 4, and accordingly, labor saving is desired.

Moreover, at the time of assembly by such worker's work,
Variations in the force acting on the shaft 2 may cause variations in quality.

It is an object of the present invention to provide a shaft insertion method and device capable of automatically fitting and inserting a shaft, which is fixed perpendicular to a disc, into a shaft hole opened upward. Is.

Means for Solving the Problems According to the present invention, a shaft perpendicular to a disc is fixed, and in the insertion method in which the shaft is fitted into a shaft hole opened upward, the end of the shaft is Partly fitted in, or
In the contacted state, a roller having a rotation axis on a straight line passing through the axis of the shaft hole and having a diameter smaller than that of the disc is rotated while being pressed against the surface of the disc opposite to the shaft. This is the method of inserting the shaft.

Further, according to the present invention, in a shaft insertion device in which a shaft perpendicular to a disc is fixed, and the shaft is fitted and inserted into a shaft hole opened upward, the shaft is arranged above the shaft hole and A roller having a rotation axis on a straight line passing through the axis, having a diameter smaller than that of a disc, and being vertically movable, a means for rotationally driving the roller around the rotation axis, and a roller along the rotation axis. And a means for pressing the surface of the disc opposite to the shaft by a spring force.

Operation According to the present invention, the roller having the rotation axis on the straight line passing through the axis of the shaft hole is pressed against the disc with the end of the shaft partially fitted in or in contact with the shaft hole. While rotating. The roller has a smaller diameter than the disc. Therefore, the peripheral edge of the roller makes frictional contact with the surface of the disc, and the shaft is fitted into the shaft hole and fitted.

Embodiment FIG. 1 is a plan view of the whole embodiment of the present invention.
The figure is a side view thereof. Two shaft holes 8 and 9 formed in the chassis 7 of the magnetic tape cassette recording or reproducing device.
Then, as clearly shown in FIG. 3, the shafts 12, 13 of the disks 10, 11 acting as flywheels are automatically fitted and inserted. The chassis 7 is fixed to the base 15 of the platen 14, and the platen body 16 is fixed to the base 15. Discs 10 and 11 are arranged on the platen body 16 with shafts 12 and 13 facing upward. The axes of the shafts 12 and 13 are on a linear extension of the axes of the disks 10 and 11. Such a platen 14 is a transportation means.
It is conveyed by the arrow 17 by means of 17 and stopped by the stopper 19 which can be moved up and down, and thereafter, the detection means 20 moves the shafts 12, 13
It is detected by means of grease 21,22 whether or not the washers 23,24 are inserted, and then by the reversing means 21, the shafts 12,13 are detected.
Pinch the disks 10 and 11 upside down so that the disks 10 and 11 are above the shafts 12 and 13.
0 and 11 are gripped and moved, and the shaft is rotated by the pressing rotation means 26.
10 and 11 are fitted and inserted into shaft holes 8 and 9 having a vertical axis line that opens upward.

In the conveying means 17, the base 15 of the platen 14 is fixed to the horizontally stretched portion of the pair of endless chains 27, and when the platen 14 is moved in the direction of the arrow 18, its downstream side in the moving direction. As shown in FIG. 4, the stopper 19 is projected by a cylinder 29 (to the left of FIGS. 1 to 3). As a result, the platen 14 hits the stopper 19 and stops at a predetermined localization value. Then cylinder 30
Thus, the positioning member 32 having the positioning protrusion 31 is lifted from the lower limit position and fitted into the positioning hole 31a formed on the lower surface of the base 15 of the platen 14. In this state, the upper surface of the platen body 16 of the platen 14 contacts the positioning piece 33 formed in an inverted L shape. Platen 14
Is stopped and held at a precise predetermined position.

FIG. 5 is a plan view of the detecting means 20 and the reversing means 27.
The figure is a sectional view as seen from the side. In the detection means 20, a rotary actuator 36 is fixed to a bracket 35 provided upright on a base 34, and a rotary shaft 37 having a horizontal axis is reciprocated by the rotary actuator 36 over 180 degrees. To be done. This rotating shaft 37 is supported by a bearing 38 as a supporting member.
It is rotatably supported by 39. The rotating shaft 37 has arms 40, 4
One end of 1 is fixed. This arm 40 has a rotating shaft 37
A guide shaft 42 extending perpendicularly to the axis of is fixed. Supporting pieces 45, 46 are supported on the guide shaft 42 by bearings 43, 44 such as ball bushes so as to be movable along the axis of the guide shaft 42. The cylinder 47 drives the support pieces 45 and 46 to be displaced toward and away from each other. A micro switch 48 is fixed to one support piece 46, and an actuator 49 of this micro switch 48 is the other support piece.
It projects toward 45. Due to the angular displacement of the actuator 49 as indicated by the arrow 50, the switching mode of the microswitch 48 is changed from the conductive state to the cutoff state,
Or vice versa.

The other arm 41 is also provided with support pieces 51 and 52, and an actuator 54 of the micro switch 53. The base 34 can be moved up and down by a cylinder 55. A guide shaft 56 extending vertically below the base 34 is supported on a base 58 by a bearing 57 such as a ball bush.

In order to detect whether the washers 23 and 24 are attached to the shafts 12 and 13 by the detecting means 20, first, the piston 55 is used to raise the base 34, and then the rotary actuator 36 is used. The rotary shaft 37 is angularly displaced 180 degrees in the direction of arrow A1. This state is as shown in FIG. 7 (1).

Then, as shown in FIG. 7 (2), the bed 34 is lowered by the cylinder 55 to a position where the washer 23 exists between the support pieces 45 and 46.

Next, using the cylinder 47, the mutual distance between the support pieces 45 and 46 is set to a predetermined value. When the washer 23 is supported between the shafts 12, the actuator 49 of the micro switch 48 is pressed and displaced, and the switching mode of the micro switch 48 changes, whereby the existence of the washer 23 is confirmed. In the detecting means 20, after the washer 23 is detected, the supporting pieces 45 and 46 are displaced by the cylinder 47 so as to be separated from each other. Next, the cylinder 55 raises the base 34, and then the actuator 36 rotates the rotation shaft 37 180 in the direction A2 opposite to the arrow A1.
It is inverted once to return to the original state.

The same operation is performed for the other support pieces 51 and 52, and the presence or absence of the washer 24 is detected.

When it is detected that the washers 23, 24 are attached to the shafts 10, 11 by the grease 21, 22, the discs 10, 11 are then inverted by the reversing means 21.

The reversing means 21 is a bracket fixed upright to the base 34.
The bracket 60 has a rotary actuator 61 attached thereto. The rotary actuator 61 can make a 180-degree reciprocal angular displacement of a rotary shaft 62 having a horizontal rotary axis. The rotating shaft 62 is rotatably supported by a supporting member 64 by a bearing 63. The base ends of the arms 65 and 66 are fixed to the rotating shaft 62.

FIG. 8 is a perspective view of a part of the inverting means 21. Suction means 67, 68 are provided on the arms 65, 66. This suction means 67 is, as shown in FIG. 9, a guide shaft 70 supported by a bearing 69 such as a roll bush at the end of the arm 65.
And a mounting plate 71 is fixed to the guide shaft 70. The coil spring 72 through which the guide shaft 70 is inserted is interposed between the arm 65 and the support plate 71, and biases the support plate 71 upward in the state shown in FIGS. 5 and 6. Guide shaft 70
The stopper 70a fixed to the arm prevents the arm 65 from coming off. Support shafts 73 and 74 that are parallel to the guide shaft 70 are erected on the support plate 71. Further, on the support plate 71, cylindrical bodies 77 and 78 having suction holes 75 and 76 and having an elastic force are erected. At the center of the support plate 71, a support cylinder 80 having a fitting hole 79 is erected upright as clearly shown in FIG. This support cylinder 80
Has a truncated cone-shaped guide surface 81, which is a fitting hole.
Continue to 79. The axis of the support cylinder 80 is on the extension of the axis of the guide shaft 70, and the axes of the support shafts 73 and 74 and the axes of the cylinders 77 and 78 are present on one virtual circle centered on this axis. .

The operation of reversing the disk 10 upside down using the reversing means 21 will be described. With the base 34 raised by the cylinder 55,
Using the rotary actuator 61, the rotary shaft 62 is angularly displaced 180 degrees in the direction of arrow A3 in FIG. Cylinder 5 in this state
The base 34 and thus the support plate 71 is lowered by the step 5.
Therefore, the upper portion of the shaft 12 erected on the disc 10 is fitted into the fitting hole 79 from the guide hole 81 as shown in FIG. Then, the cylinder 55 is then used to raise the base 35, and the rotary actuator 61 is used to rotate the rotary shaft 62 in the direction A4 opposite to the arrow A3.
Rotate it once. As a result, the disc 10 is supported by the suction holes 75 and 76 in a state of being vacuum-suctioned, while being in contact with the support rods 73 and 74, as indicated by reference numeral 10a in FIG. Flexible tubes are connected to the cylindrical bodies 77 and 78, and the suction holes 75 and 76 are vacuumed.

The support plate 82 provided on the other arm 66 has a similar structure, and the disk 11 is inverted.

FIG. 11 is a simplified perspective view of the grip moving means 25.
FIG. 12 is a sectional view of the grip moving means 25, and FIG. 13 is a right side view of a part of the grip moving means 25. Referring to these drawings, a support piece 84 is fixed to a pedestal 83 mounted at a fixed position, and the support piece 84 has a double-acting cylinder 85 and a pair of upper and lower guide cylinders 86, 87. And are fixed. The piston rod 88 of the cylinder 85 is fixed to the moving body 89. Guide rods 90 and 91 are fixed to the moving body 89. Guide rod 90,
The guide cylinders 86, 87 are inserted into the support 91, and the support 91 is supported by bearings 88, 89 such as ball bushes so as to be horizontally movable. Mobile 8
Guide cylinders 92 and 93 are provided upright on the shaft 9, and guide shafts 96 and 97 are vertically movably supported by bearings 94 and 95 such as ball bushes. The moving body 89 includes double-acting cylinders 98,99.
Are fixed, and these piston rods 100 and 101 are fixed to the lifting body 102. The lifting body 102 has chucks 103, 104 which are gripping means for gripping the disks 10, 11 in the cylinder 1.
It is possible to displace the mutual distance by 05.
The horizontal guide shaft 106 fixed to the lifting body 102 is inserted through the upper portions of the chucks 103 and 104. A coil spring 107, through which the guide shaft 106 is inserted, urges the gripping means 103, 104 in a direction away from each other, and the cylinder 105 resists the spring force of the spring 107 to move the chuck 103 to the first position as indicated by reference numeral 108. It can be displaced to the left in Fig. 12.

In the chuck 103, as clearly shown in FIG. 13, the grip pieces 109 and 100 are driven to be displaced toward and away from each other by the cylinder 111.

The cylinder 55 is raised and the disks 10 and 11 are turned over by the reversing means 21.
Therefore, when it is held in the inverted state as shown in FIG. 6, the piston rod 88 of the cylinder 85 is displaced in the direction of arrow A5, and the chucks 103 and 104 are moved by the action of the cylinder 105. It is displaced as shown by the broken line 108 and brought directly above the disks 10, 11. At this time, the cylinders 98 and 99 are still reduced, and the gripping means 103 and 104 are at the upper limit position as shown in FIG.

Then, drive the cylinder 98 to move the chucks 103 and 104 to the arrow A6.
Descend to. As a result, the gripping pieces 109, 110 of the chuck 103 are
Are arranged on both sides of the disc 10. Then, the cylinder 111 is driven and the disc 10 is grasped by the grasping pieces 109 and 110 as shown in FIG. After this grip, the piston rod 100 of the cylinder 98
Ascend in the direction A7 opposite the arrow A6. The cylinder 105 displaces the chuck 103 to the position of the reference numeral 108 in FIG. 12, and brings the disks 10 and 11 held in close proximity to each other by the reversing means 27.
Is positioned so as to be gripped by the gripping means 103, 104.

Next, the cylinder 85 is extended, and together with this, the chucks 103, 104 are displaced by the cylinder 105 from the state of the broken line 108 in FIG.
The moving body 89 is moved so that the shafts 10 and 11 on which 1 hangs are directly above the shaft holes 8 and 9.

Therefore, the cylinder 99 is used to greatly lower the elevating body 102 as indicated by arrow A8, and as shown in FIG. 14, the shafts 12 and 13 are provided in the shaft holes 8 and 9, and the lower ends of the shafts 12 and 13 are, for example, about 2 mm. Slight length a
Only partially fit and insert. Therefore, the shafts 12 and 13 are erected in a state of being partially fitted in the shaft holes 8 and 9. In this state, the gripping pieces 109, 110 of the chuck 103 are displaced by the action of the cylinder 111 in the directions away from each other. Therefore, due to the weight of the discs 10 and 11 and the shafts 12 and 13, the shafts 12 and 13 are
Get inside 8,9.

As shown in FIG. 14, a pinch roller 11 is provided below the shaft hole 8.
When 2 is present, the shaft 12 may come into contact with the pinch roller 12 and the shaft 11 may not descend sufficiently to the lower limit position 113a. Therefore, rotation pressing means 26 is provided as shown in FIG. A side surface of a part of the rotation pressing means 26 is shown in FIG. 16, and its cross section is shown in FIG. The flat rollers 113 and 114 are fixed to the rotating shafts 115 and 116. A pin 116a is projected on the rotary shaft 115, and the pin 116a is inserted through the elongated hole 118 of the guide cylinder 117, whereby the rotary shaft 115 and the rotary cylinder 117 are displaceable in the axial direction. Moreover, mutual rotation in the circumferential direction is prevented. Long hole 11
A light passage hole 119 is formed in the shaft 115 facing the shaft 8.
An optical fiber 120 for irradiating light is arranged facing the light passing hole 119, and an optical fiber 121 for receiving light is arranged on the opposite side of the light passing hole 119. These optical fibers 120 and 121 are fixed to the support 123 by a support piece 122. The other rotary shaft 116 has a similar structure, and the rotary cylinder 124
Is provided.

Gears 125 and 126 are fixed to the rotary cylinders 117 and 124, and these gears 125 and 126 are screwed to the gear 127. The gear 127 is
It is rotationally driven by a DC geared motor 128. The geared motor 128 is fixed to the support 123. Support 123
Can be moved up and down by a cylinder 130 fixed to the moving member 129. Guide rods 131 and 132 are fixed to the support 123, and are guided up and down by guide cylinders 133 and 134 fixed to the moving member 129. This moving body 123 has springs 135, 1
It is urged upward by 36.

The moving body 129 can be moved horizontally by the cylinder 137. Guide rods 138 and 139 are fixed to the moving body 129, and these are supported by guide tubes 141 and 142 attached to a gantry 140.

In order to completely insert the shaft 12 projecting upward from the shaft hole 8 into the shaft hole 8, operation is performed by the rotary pressing means 25. First, while the moving body 123 is set to the upper limit position by the action of the cylinder 128, the rotary shaft 1 is set by the cylinder 137.
The vertical axis of rotation of 15,116 is provided so as to be directly above the shaft holes 8 and 9. Therefore, by the action of the cylinder 130, the moving body 1
23. Therefore, the rollers 113 and 114 are lowered to the lower limit position by a predetermined distance. The disc 10 is located above the shaft hole 8 with a space therebetween, and the roller 11 that is in contact with the disc 11
3 is urged downward by the spring force of the spring 145,
Therefore, the light passage hole 119 is located above the light path of the optical fibers 120 and 121. Spring 145 housed in guide tube 117
Urges the rotating shaft 115, and hence the roller 113, downwardly by spring as described above. In this state, the motors 128 drive the rollers 113 and 114 to rotate. Therefore, the lower end surface or the peripheral edge 113a of the roller 113 makes frictional contact with the upper surface of the disc 10 and rotates while urging the disc 10 and the shaft 12 downward. In this way, the shaft 12 rotates while coming into contact with the pinch roller 112, and completely fits into the shaft hole 8.

As shown in FIG. 14, when the gear 146 is fixed to the lower surface of the disc 10, the gear 147 is mounted on the device 7,
As the disc 10 and the gear 146 are driven while rotating, the gears 146 and 147 mesh with each other. Another disc 1
The same operation is performed for 1. Thus the disc 10
Is the lower limit position and the gears 146 and 147 are in mesh with each other,
The light passage hole 119 is located in the optical path of the optical fibers 120 and 121.
In this way, it is detected that the shaft 11 fixed to the disc 10 is fitted and inserted into the shaft hole 8. Then the cylinder 130
The moving body 123 is lifted as indicated by arrow A9, and the cylinder 1
It returns to its original position by reducing 37. In this way, a series of operations is completed.

The gears 146 and 147 shown in FIG. 14 are omitted in the other drawings for the sake of simplicity.

FIG. 20 is a sectional view of another embodiment of the present invention. In this embodiment, as shown in FIG. 20 (1), the shaft hole 8 of the device 7 is
With the end of the shaft 12 resting on it, the peripheral end of the disc 10 is on the device 7. In this state, as shown in FIG. 20 (2), the upper surface of the disk 10 is brought into frictional contact with the peripheral portion 113a of the roller 113 having a diameter smaller than that of the disk 10 to rotate the roller 113. The rotation axis of the roller 113 is on the extension of the vertical axis 171 of the shaft hole 8. While rotating the roller 113, the disk 10 is rotated while being pressed by the spring 145 (see FIG. 18 described above). This allows the shaft 12 to
With its end part partially fitted in the shaft hole 8, it rises while rotating. As a result, the end of the shaft 12 fits into the shaft hole 8 as shown in FIG. Further, while rotating the roller 113 or stopping the rotation, the roller 1
The disc 10 is pressed by the 13. Therefore, shaft 12 has shaft hole 8
Is fully inserted into.

The present invention is not only carried out in connection with a flywheel, etc., but in addition, the axis perpendicular to the disc is fixed,
This shaft can be widely used to fit and insert into a shaft hole that opens upward.

EFFECTS OF THE INVENTION As described above, according to the present invention, it becomes possible to automatically fit and insert a vertical shaft fixed to a disc into a shaft hole that is opened upward, and therefore automation is possible. As a result, it is possible to reduce labor and suppress variations in quality.

[Brief description of drawings]

FIG. 1 is an overall plan view of an embodiment of the present invention, FIG. 2 is a side view of the embodiment, FIG. 3 is a simplified perspective view of a carrying means 17, and FIG. 4 is a side view of the carrying means 17. Figures and 5 show the detection means
20 is a plan view of the reversing means 27, FIG. 6 is a side view of the detecting means 20 and the reversing means 27, FIG. 7 is a side view for explaining the operation of the detecting means 20, and FIG. FIG. 9 is a partial perspective view of the reversing means 21, and FIG. 9 is a suction means provided in the reversing means 21.
67 is a perspective view, FIG. 10 is a perspective view showing a state in which the disk 10 and the shaft 12 are held by the suction means 67, FIG. 11 is a simplified perspective view of the grip moving means 25, and FIG. Sectional view of the moving means 25, FIG. 13 is a right side view of a part of the gripping moving means 25, FIG.
The figure is a sectional view for explaining the operation when the shaft 12 is inserted into the shaft hole 8, FIG. 15 is a simplified perspective view of a part of the pressing and rotating means 26, and FIG. 16 is a shaft using rollers 113 and 114. 12,13 shaft hole
FIG. 17 is a front view of the pressing and rotating means 26, and FIG.
17 is a sectional view of the pressing rotation means 26 shown in FIG. 17 as viewed from the left side,
FIG. 19 is a perspective view showing the rotary shaft 115 and the rotary cylinder 117, FIG. 20 is a sectional view for explaining the operation of another embodiment of the present invention, and FIG. 21 is a sectional view for explaining the prior art. is there. 8,9 ... Shaft hole, 10, 11 ... Disc, 12,13 ... Shaft, 17 ... Conveying means, 20 ... Detection means, 21 ... Inversion means, 25 ... Gripping movement means, 26 ... … Pressing and rotating means, 113,114 …… Roller, 1
45 ...... spring

Claims (2)

[Claims] 1. An insertion method in which a shaft perpendicular to a disk is fixed, and the shaft is fitted into a shaft hole opened upward to be inserted, and an end of the shaft is partially fitted into the shaft hole. Or
In the contacted state, a roller having a rotation axis on a straight line passing through the axis of the shaft hole and having a diameter smaller than that of the disc is rotated while being pressed against the surface of the disc opposite to the shaft. How to insert the axis. 2. A shaft perpendicular to a disk is fixed, and in a shaft insertion device for inserting this shaft into a shaft hole opened upward, the shaft insertion device is arranged above the shaft hole. A roller having a rotation axis on a straight line passing through the axis, having a diameter smaller than that of a disc, and being vertically movable, a means for rotationally driving the roller around the rotation axis, and a roller along the rotation axis. Means for pressing with a spring force on the surface of the disc opposite to the shaft.