JPH0150535B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to an automatic washer mounting machine for mounting circumferentially divided washers on a shaft of an audio device or the like.

BACKGROUND ART As shown in FIG. 8, a washer 1 is made of resin and is divided in the circumferential direction by notches indicated by reference numerals 2. The inner diameter d of this washer 1
1 is, for example, 1.0 mm, and its outer diameter d2 is 3.5
mm, and thickness 1 is 0.3 mm. Such a washer 1 has a gear 5 attached to a shaft 4 which is crimped and fixed to a chassis 3 of an audio equipment, as shown in FIG. 9, for example.
is rotatably supported and is used to prevent it from coming off. On the shaft 4, a small-diameter neck portion 6, a large-diameter cylindrical portion 7, and a truncated conical portion 8 connected to the cylindrical portion 7 are coaxially connected in this order. A fitting groove 9 is formed in the neck portion 6 over its entire circumference. The washer 1 is fitted into the fitting groove 9, thereby preventing the gear 5 from coming off. The outer diameter d3 of the shaft 4 is, for example, 2 to 3 mm, and the outer diameter d4 of the neck 6 is 1 mm.
The outer diameter d5 of the cylindrical portion 7 is, for example, 1.6 mm.

In order to mount such a small washer 1 on the shaft 4, an insertion tool 10 is conventionally used as shown in FIG. A slight amount of grease 12 is applied to the tip 11 of the insertion tool 10, and the washer 1 is attached to the tip 11 by the grease 12 as shown in FIG. By pressing the insertion tool 10 with the washer 1 attached to the tip 11 onto the shaft 4, the washer 1 is inserted and mounted as shown in FIG.

Problems to be Solved by the Invention Since such conventional mounting work is manual and the washer 1 is extremely small, the workability is poor. Furthermore, when attempting to fit the washer 1 onto the shaft 4 by simply pressing the insertion tool 10 toward the shaft 4, both ends 13 and 14 of the washer 1 are bent as shown in FIG. 12. It's getting hot,
Alternatively, as shown in FIG. 12, both ends 13 and 14 of the washer 1 may open, making it impossible to securely mount the washer 1 on the neck 6 of the shaft 4.

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic washer mounting machine that can automatically insert small washers.

Another object of the present invention is to provide an automatic washer mounting machine that can reliably mount even small washers.

Means for Solving the Problems The present invention provides means comprising: a unit for vacuum suctioning the washer; a negative pressure source connected to the suction unit to perform the vacuum suction operation; means for rotationally driving the suction unit around the rotation axis so that the axis of the unit is within a virtual conical plane inclined with respect to the rotation axis and preventing the suction unit from rotating around the axis of the suction unit; This is an automatic washer mounting machine characterized by comprising:

In a preferred embodiment, the adsorption unit comprises:
A contact surface that the washer contacts, a guide pin that can be inserted gently into a suction hole formed in the center of the contact surface and protrude from the suction hole, and a guide pin that is inserted in the direction in which the guide pin protrudes from the suction hole. The automatic washer mounting machine includes a biasing spring, and the negative pressure source draws suction from a gap between an inner circumferential surface of a suction hole and an outer circumferential surface of a guide pin.

Furthermore, in a preferred embodiment, the drive means includes a support member rotatable about the rotation axis; and the drive means is provided on the support member and supports the suction unit rotatably about the axis, and the drive means includes a support member rotatable about the rotation axis; a locking rod projecting from the suction unit; and a locking rod mounted in a fixed position and locking to a locking end of the locking rod, the rotation An automatic washer mounting machine characterized by comprising: a locking member that allows displacement with the locking end along the axis; and means for rotationally driving the support member around the rotation axis.

Function: The washer is vacuum-adsorbed by the adsorption unit, and in this state, the adsorption unit is driven to rotate around the axis of rotation within the virtual conical plane, and this adsorption unit is not rotated around the axis of the adsorption unit. This makes it possible to automatically and reliably mount the washer in the fitting groove of the shaft or the like.

Embodiment FIG. 1 is a perspective view of an embodiment of the present invention.
A support 17 having a vertical axis is erected on the base 16, and a first support 1 extending horizontally is attached to the support 17.
8 is fixed. A horizontal guide rail 19 is attached to the first support 18 . The guide rail 19 allows the second support 20 to be moved horizontally by the lateral movement source 21 . A base body 22 is provided on the second support body 20 and is vertically movable along a vertical movement source 23 . The lateral movement source 21 and the vertical movement source 23 are actuated by air pressure.

FIG. 2 is a front view of the vicinity of the base body 22. A pneumatic swing motor 24 is fixed to the base body 22 .
The output shaft 24a of this pneumatic motor swing 24 includes:
Gear 25 is fixed. The output shaft 24a can be reciprocated by, for example, 280 degrees around its axis. Another gear 26 meshes with the gear 25. Gear 26 is fixed to drive shaft 27 . This drive shaft 27 is supported by single-row deep groove ball bearings 28, 29, and these bearings 28, 29 receive radial force and thrust force. The gear 25 is
The gear 26 and the drive shaft 27 have a larger diameter than the gear 26, and the output shaft 24a of the swing motor 24 is angularly displaced, so that the gear 26 and the drive shaft 27 are
Rotated twice. FIG. 3 is an exploded perspective view of the vicinity of the lower end of the drive shaft 27. A keyhole 30 is formed at the lower end of the drive shaft 27 . A tube 32 is provided upright on the mounting plate 31 and constitutes a support member 33. A key groove 35 is formed in the insertion hole 34 of the cylinder 32. A key 36 is fitted across the keyhole 30 and the keyway 35. The lower end surface of the mounting plate 31 is received by a receiving plate 37. This receiving plate 3
A bolt 38 is inserted through 7, and this bolt 38 is screwed into a screw hole 39 formed in the drive shaft 27. In this way, the support member 33 is configured to be able to move up and down along the drive shaft 27 and to be angularly displaced integrally with the drive shaft 27 by the action of the key 36. A mounting hole 40 is formed in the mounting plate 31 at a position offset from the cylinder 32, and insertion holes 41 are formed on both sides of the mounting hole 40. The support member 33 is urged downward in FIG. 2 by a spring 89.

The shaft support cylinder 43 is fixed to the mounting plate 31 by the bolt 42 inserted through the insertion hole 41 with the end surface 44 of the shaft support cylinder 43 in contact with the lower surface of the mounting plate 31 .

FIG. 4 is a sectional view of the shaft support cylinder 43 and its vicinity. The shaft support cylinder 43 has an insertion hole 45 and a support hole 46 connected to the insertion hole 45 . A side hole 47 is provided in the peripheral wall of the shaft support cylinder 43 with a circumference of 3
Formed at equal positions. A spring 48 is housed in this side hole 47, and this spring 48 is pressed by a bolt 49. The three springs 48 are inserted into the insertion hole 45.
and a suction unit 50 inserted into the support hole 46.
The outer periphery of the suction unit 50 is forcefully pressed, thereby supporting the suction unit 50 at the center of the support hole 46. A sphere 52 is fixed to the base end of the suction unit 50.
This sphere 52 is supported by a sphere seat 53. The spherical seat 53 enters the mounting recess 54 of the support member 31 and is fixed with the shaft support cylinder 43. Sphere 52
And the ball seat 53 has an insertion hole 40 connected to the storage hole 45.
It's within. The sphere 52 is supported by the spherical seat 53, so that the suction unit 50 can be angularly displaced about its axis 55.

FIG. 5 is an exploded perspective view of the suction unit 50. In the main body 57 of the suction unit 50, a spring chamber 58 and a guide hole 59 which is connected to the spring chamber 58 and has a smaller diameter than the spring chamber 58 are coaxially formed. A shoulder surface 60 is formed between the spring chamber 58 and the guide hole 59. An external thread is cut into the tip 61 of the main body 57, and the internal thread of the cap 63 is screwed into this external thread. The cap 63 has a guide hole 59.
A suction hole 64 coaxial with that is formed. Suction hole 6
A contact surface 65 is formed at the outer circumferential end of 4. This contact surface 65 is perpendicular to the axis 55 coaxial with the guide hole 59 .

An actuating member 66 is housed within the main body 57 .
This actuating member 66 has a guide hole 59 and a spring chamber 58.
It consists of a flange 68 that is inserted into the flange 68 and can come into contact with the shoulder 60, and a guide pin 69 that extends to the tip of the shaft 67. A flat surface 70 is formed on the shaft portion 67 along its longitudinal direction. The spring 71 housed in the spring chamber 58 biases the actuating member 66 toward the guide pin 69 side. The main body 57 has a screw hole 7.
A mounting screw 73 is screwed into this screw hole 72, and a bolt 73 is screwed with a nut 74.
Locking is achieved. Bolt 73 has flat surface 7
0, thereby causing the actuating member 66 and the main body 57 to
A mutual angular displacement about the axis 55 is prevented. A pipe joint 75 is screwed in communication with the guide hole 59 .

A base plate portion of a locking rod 76 is screwed onto the bolt 73. The locking end 77 of this locking rod 76
is inserted into the locking elongated hole 79 of the locking member 78. The locking elongated hole 79 is parallel to the axis 80 of the drive shaft 27 . The axis of the locking rod 76 is perpendicular to the axis 55 of the suction unit 50. The locking member 78 includes a locking piece 81 in which a locking elongated hole 79 is formed, and a locking piece 81.
1, and a mounting piece 83 connected to the bent portion 82 and fixed to the base 22. The bent portion 82 extends toward the suction unit 50 and above the plane of the paper in FIG.
It becomes possible to keep the locking end portion 77 locked in the locking elongated hole 79 by shortening the locking end portion 77 .

The pipe joint 75 is connected to a flexible tube 85, and the flexible tube 85 is connected to a negative pressure generating means 86 shown in FIG. A passage 87 through which compressed air flows is formed in the negative pressure generating means 86, and a passage 88 to which the flexible tube 85 is connected faces the passage 87. By supplying compressed air to the passage 87 and discharging the compressed air from the outlet 89, the passage 88 and the flexible tube 85 become under negative pressure. Therefore, air is sucked from the gap between the inner peripheral surface of the suction hole 64 and the outer peripheral surface of the guide pin 69, and the washer 1 can be vacuum-adsorbed tightly onto the contact surface 65.

The tip of the guide pin 69 in the suction unit 50 projects slightly outward from the contact surface 65 while the flange 68 of the actuating member 66 is in contact with the shoulder 60 of the main body 57 . With this, when the washer 1 is attracted, the hole of the washer 1 is aligned with the guide pin 6.
9 and can be aligned.

The operation of installing the washer 1 will be described. As shown in FIG. 1, the washers 1 are fed one by one from the feed end 88 of the vibrating feeder 87. Lateral movement source 21
The base body 22 is moved so that the axis 80 is directly above the supply end 88, and in this state, the base body 22 is lowered by the vertical movement source 23 as indicated by the reference numeral. A single washer 1 is attracted to and abutted against the contact surface 65 of the suction unit 50 concentrically with the axis 55 as indicated by the reference numeral.

While being sucked by the suction unit 50, the base 22 is raised by the vertical movement source 23 as indicated by the reference numeral.

Next, the base body 22 is horizontally moved by a lateral movement source 21, as indicated by the reference numeral, together with a vertical movement source 23, to a predetermined position.

There, as indicated by reference numeral 23, the vertical movement source 23
The base body 22 is lowered by the truncated conical portion 8 shown in FIG.
and contacts the cylindrical portion 7. At this time, the suction unit 50 can be displaced against the spring force of the spring 89, and the actuating member 66 can be displaced against the spring 71. In this state, the swing motor 24 rotates the drive shaft 27 1 to 2 times in one direction as indicated by the reference symbol, and then rotates the drive shaft 27 1 to 2 times in the opposite direction as indicated by the reference symbol. do. Drive shaft 2
7 rotates, the axis 55 of the adsorption unit 50
is within a virtual conical surface having an axis 80, and the center of the end facing the contact surface 65 of the suction hole 64 is within the axis 55,
It is located on the intersection 64a of 80. The state in which the suction unit 50 is farthest from the locking member 78 is as shown by the solid line in FIG.
The condition of locking rod 76 when it is closest to tie 78 is indicated by reference numeral 76a. Since the end 77 of the locking rod 76 remains fitted into the locking elongated hole 79, the suction unit 50 does not rotate about its axis 55 so to speak. Therefore, when the washer 1 is in contact with the truncated conical portion 8 and the cylindrical portion 7 of the shaft 4, as mentioned above,
It is rotated as shown in and fitted into the fitting groove 9. Thereafter, the base body 22 is raised as indicated by the reference numeral by the longitudinal displacement source 23 and then the base 22 is raised by the lateral displacement source 21 as indicated by the reference numeral.
is moved horizontally and returned to its original resting position.

FIG. 7 is a perspective view of another embodiment of the invention.
This embodiment is similar to the previous embodiment and corresponding parts are provided with the same reference numerals. In this embodiment, the washer to be mounted is different from the above-mentioned washer 1 and has an endless shape, and the above-mentioned notch 2 is not formed, or similarly to the above-mentioned washer 1, the notch 2 is formed. However, it can be easily mounted due to the dimensional relationship between the inner diameter d1 and thickness 1 of the washer and the truncated conical portion 8 and cylindrical portion 7 of the shaft 4. Such a washer can be mounted by pressing it coaxially onto the tip of the shaft to be mounted. Attached to the base body 90, which is moved for this purpose by the lateral displacement source 21, is a suction unit 92 which is raised and lowered by a double-acting pneumatic cylinder 91. This suction unit 92 has guide rods 93, 94
It is guided up and down by. The guide rods 93 and 94 and the suction unit 92 are commonly fixed to a support member 95. Axis of cylinder 91 and suction unit 92
It is on one straight line with the axis of. Adsorption unit 92
has a structure similar to the suction unit 50 of the previous embodiment, and the end of the main body 57 is fixed to the support member 95.

The endless washer fed to the feed end 88 of the vibrating feeder 87 is sucked as shown by the reference numeral by the suction unit 92 which descends as the cylinder 91 is extended as shown by the reference numeral. , after which the cylinder 91 contracts and rises as indicated by the reference numerals. The base body 90 is then horizontally moved by the lateral movement source 21 to reach a predetermined position, as indicated by the reference numerals. The cylinder 91 is expanded again, and the suction unit 92 is lowered as shown by the reference numeral, and is attached to the shaft 4.
After installing the washer on the shaft 4, the cylinder 91
is raised as indicated by the reference numeral and finally moved horizontally by the lateral movement source 21 as indicated by the reference numeral and returned to its original rest position.

According to the present invention, it is possible to mount a washer or the like having a shape different from that of the above-described embodiments.

Effects As described above, according to the present invention, even a small washer can be automatically and accurately mounted, and productivity can be improved.

[Brief explanation of drawings]

1 is a perspective view of an embodiment of the present invention, FIG. 2 is a cross-sectional view of the vicinity of the base 22, FIG. 3 is an exploded perspective view of the vicinity of the lower end of the drive shaft 27, and FIG. 4 is the suction unit 5.
0, FIG. 5 is an exploded perspective view of the adsorption unit 50, FIG. 6 is a sectional view of the negative pressure generating means 86, and FIG.
8 is a perspective view of the washer 1, FIG. 9 is a sectional view showing the washer 1 in a mounted state, and FIG. 10 is a conventionally used insertion tool 10. 11 is a perspective view of the insertion tool 1.
12 is a perspective view showing the washer 1 mounted using the insertion tool 10. FIG. 18...first support body, 19...guide rail, 2
0... Second support body, 21... Lateral movement source, 22...
Base body, 23... Vertical movement source, 24... Swing motor,
25, 26... Gear, 27... Drive shaft, 33...
Support member, 43... Pivot support cylinder, 50... Adsorption unit, 66... Operating member, 69... Guide pin, 7
6... Locking rod, 78... Locking member, 86...
Negative pressure generating means.

Claims (1)

[Scope of Claims] 1. Means comprising: a unit for vacuum suctioning the washer; a negative pressure source connected to the suction unit for performing the vacuum suction operation; and means for driving the suction unit to rotate around the axis of rotation so that the suction unit is located within a virtual conical plane inclined with respect to the axis, and prevents the suction unit from rotating around the axis of the suction unit. Automatic mounting machine for washers. 2. The suction unit is gently inserted into a contact surface on which the washer contacts, a suction hole formed in the center of the contact surface, and a guide pin that can protrude from the suction hole, and the guide pin suctions the guide pin. and a spring biased in a direction protruding from the hole, and the negative pressure source draws suction from a gap between an inner circumferential surface of the suction hole and an outer circumferential surface of the guide pin. The automatic washer mounting machine described in item 1. 3. The drive means includes a support member rotatable about the rotation axis; and the drive means is provided on the support member and supports the suction unit rotatably about the axis, the axis being inclined with respect to the rotation axis. a locking rod protruding from the suction unit; and a locking end that is attached to a fixed position and locks to a locking end of the locking rod and extends along the rotational axis. 2. The automatic washer mounting machine according to claim 1, further comprising: a locking member that allows displacement between the washer and the support member; and means for rotationally driving the support member about the rotation axis.