JPH0325954Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention consists of a first member having a cylindrical portion and a second member fitted into the cylindrical portion of the first member. The present invention relates to an adhesive device that performs adhesive bonding using a liquid adhesive.

[Technical background of the invention] For example, in a radial gap type brushless motor for driving a floppy disk, the rotor is manufactured by fixing an annular permanent magnet by adhesive within a rotor yoke formed in the shape of a shallow cylindrical container.

The adhesive used here is a two-component adhesive mainly due to strength requirements, and the adhesive device mixes the two components in a nozzle and then discharges the two-component mixture onto one end surface of a permanent magnet. After this, a rotor yoke is fitted onto the rotor yoke and pressurized.

[Problems with the Background Art] However, since the curing reaction of two-component adhesives starts immediately after mixing, it takes a long time from the time mixing begins in the nozzle until the rotor yoke is fitted to the permanent magnet and pressure is applied. If it becomes even slightly longer, the curing reaction progresses too much during that time, resulting in a decrease in adhesive strength, resulting in poor adhesion. Moreover, the viscosity of the mixed adhesive rapidly increases within the nozzle as the curing reaction progresses, which causes the nozzle to become clogged, resulting in poor productivity.

Therefore, a configuration has been tried in which the two liquids are not mixed in the nozzle, but are coated one on top of the other on a permanent magnet, and a rotor yoke is placed on top of this and pressurized. According to this, nozzle clogging can be reliably prevented, but
However, even in this case, the problem remains that the curing reaction progresses between the contact surfaces of the two liquids as time passes.

[Purpose of the invention] This invention was made in view of the above circumstances.
The purpose is to reliably prevent nozzle clogging and improve productivity, while also ensuring sufficient adhesive strength by preventing the adhesive from curing before the two parts are fitted and assembled. To provide adhesive equipment.

[Summary of the invention] The invention provides an adhesive device for bonding a first member having a cylindrical portion and a second member fitted into the cylindrical portion of the first member using a two-component adhesive. , an application mechanism for rotating one of the first and second members and applying two liquids to a circumferential surface fitted to the other member while separating the two liquids in the axial direction; The present invention is characterized by comprising an assembly mechanism for fitting one member into the other member.

[Embodiment of the Invention] Hereinafter, an embodiment in which the present invention is applied to a bonding device for bonding a rotor yoke and a permanent magnet in a radial gap type brushless motor for driving a floppy disk will be described with reference to the drawings.

In FIG. 2, 1 is a rotor yoke as a first member formed in the shape of a short cylinder with a shallow bottom, and 2 is a second member that is fitted into the outer cylindrical part 1a of the rotor yoke 1 and fixed by adhesive. The members are permanent magnets, and the rotor yoke 1 and permanent magnets 2 are set on jigs 3 and 4 that are transported by a transport device (not shown). Reference numeral 5 indicates an application mechanism for applying adhesive to the rotor yoke 1, and reference numeral 6 indicates an assembly mechanism provided in the transfer device 7. 5, and after being coated with adhesive by the coating mechanism 5, the rotor yoke 1 is fitted onto the permanent magnet 2 and assembled.

Now, first of all, the transfer device 7 and the assembly mechanism 6
The specific configuration will be explained with reference to FIGS. 1 and 2. That is, 8 is a column of the transfer device 7, and a horizontally long support plate 9 is attached to the upper part of this column, and a slide plate 10 is supported on this support plate 9 so as to be movable in the lateral direction via a guide bar 11. . and,
Pneumatic cylinder 1 attached to one end of support plate 9
Two rods 12a are connected to the slide plate 10, and the slide plate 10 is moved laterally by the pneumatic cylinder 12. Reference numeral 13 denotes a pneumatic cylinder for lifting and lowering the assembly mechanism 6 that is vertically attached to the slide plate 9. A pneumatic rotary actuator 14 is attached to the lower end of the rod 13a via a mounting bracket 15. The rotary shaft 1 is connected to the drive shaft 14a of the rotary actuator 14.
6 are attached via a bearing case 17 in an orthogonal state. A pulse motor 18 for driving the rotary shaft 16 is attached to the bearing case 17, and a chuck 21 for gripping the rotor yoke 1 is attached to the tip of the rotary shaft 16 with a pair of claws 19, 19 opened and closed by a pneumatic cylinder 20. It is installed. The drive shaft 14a of the rotary actuator 14 has a rotation angle
This drive shaft 1 rotates forward and reverse within a 90° range.
By the forward and reverse rotation of 4a, the rotary shaft 16 and the pawls 19, 19 of the chuck 21 are turned vertically downward and horizontally sideways.

On the other hand, in FIG. 1 showing the details of the specific structure of the coating mechanism 5, 22 is a column, on the top of which a pneumatic cylinder 23 is installed in an inclined manner. Tanks 24 and 25 each having nozzles 24a and 25a are provided at the tip of 23a. Each of the two-component adhesive liquids is stored in these tanks 24 and 25, and each liquid is configured to be able to be discharged in predetermined amounts from nozzles 24a and 25a.

Next, the operation of the above configuration will be explained.

In the state shown in FIG.
It is located directly above the camera and is oriented vertically downward. In this state, the rod 13a of the lifting pneumatic cylinder 13 moves downward, and when the claws 19, 19 are lowered to the point where they are located at both ends of the rotor yoke 1, the claws 19, 19 are closed by the pneumatic cylinder 20. direction, and grips the cylindrical portion 1a of the rotor yoke 1 from both sides thereof. When the rotor yoke 1 is gripped by the claws 19, 19 in this way, the rod 13a of the lifting pneumatic cylinder 13 rises, whereby the rotor yoke 1 is removed from the jig 3 and raised to a predetermined height position. Then, the rod 1 of the pneumatic cylinder 12 of the transfer device 6
2a moves to the right in the figure and transfers the rotor yoke 1 to the coating mechanism 5 side. When the rotor yoke 1 is transferred to the application mechanism 5 side, the drive shaft 14a of the rotary actuator 14 rotates 90 degrees and the claws 19, 19 rotate.
As a result, the rotor yoke 1 is turned into a horizontally oriented state, and then the pneumatic cylinder 23 of the coating mechanism 5 is moved diagonally downward. This causes the nozzles 24a and 25a of the tanks 24 and 25 to
enters into the rotor yoke 1 and approaches the lower part of the inner peripheral surface of the cylindrical portion 1a. In this state, a predetermined amount of each liquid of the two-component adhesive is discharged from the nozzles 24a and 25a of the tanks 24 and 25 as shown in FIG. Rotate. As a result, as shown in FIG. 3, two liquids A and B of the two-component adhesive are applied to the entire circumference of the inner peripheral surface of the cylindrical portion 1a of the rotor yoke 1 in two stripes spaced apart in the axial direction. In this state, each liquid A
Since and B are separated, uncontacted and unmixed, no curing reaction is initiated. Thereafter, the rod 23a of the pneumatic cylinder 23 of the application mechanism 5 moves diagonally upward to return the tanks 24 and 25 to their original positions, and the rotary actuator 14 of the assembly mechanism 6 rotates 90 degrees in the reverse direction. to return the rotor yoke 1 to its original vertically downward position. In this state, the rod 13a of the lifting pneumatic cylinder 13 moves downward, and the rotor yoke 1 is fitted onto the outside of the permanent magnet 2 set in the jig 4. Then, during this fitting process, liquid A on the lower side is pushed upward by the permanent magnet 2 and comes into contact with liquid B.
Then, as the rotor yoke 1 and the permanent magnet 2 are fitted together, the liquids A and B are mixed with each other and spread thinly between the fitting surfaces of the cylindrical part 1a of the rotor yoke 1 and the permanent magnet 2. As a result, the two-component adhesive is cured, and the rotor yoke 1 and the permanent magnets 2 are securely fixed as shown in FIG. When the rotor yoke 1 and the permanent magnet 2 are bonded together as described above, the claws 19, 19 are moved in the opening direction by the pneumatic cylinder 20 to release their grip on the rotor yoke 1, and then the elevating pneumatic cylinder 13 moves upward, and the rod 12a of the pneumatic cylinder 12 of the transfer device 7 moves to the left in the figure, thus returning the assembly mechanism 6 to its original position as shown in FIG.

In this way, in this example, each liquid A of the two-component adhesive
and B are applied to the inner circumferential surface of the cylindrical portion 1a of the rotor yoke 1 without contacting or mixing, so there is no possibility that the adhesive will start curing in the nozzles 24a and 25a and cause nozzle clogging. , it is possible to prevent a decrease in productivity due to this. Furthermore, although the two liquids A and B are applied separately to the cylindrical part 1a of the rotor yoke 1, the two liquids A and B are applied to the inner peripheral surface of the cylindrical part 1a while rotating the rotor yoke 1. Since the coating is applied while being separated in the direction, by simply fitting the rotor yoke 1 to the permanent magnet 2, the two liquids A and B can be allowed to enter between the fitting surfaces in a mixed state in contact with each other. Moreover,
Since the two liquids A and B are mixed only when the rotor yoke 1 is fitted to the permanent magnet 2, there is no risk that the curing reaction of the two liquids A and B will proceed too much before the fitting. Sufficient adhesive strength with the permanent magnet 2 can be ensured.

In the above embodiment, the two liquids A and B were applied to the inner peripheral surface of the cylindrical part 1a, but the permanent magnet 2
It may be applied to the outer circumferential surface of the. Furthermore, the present invention is not limited to the case where a rotor yoke and a permanent magnet are bonded together, and the present invention is not limited to bonding a rotor yoke and a permanent magnet. It can be widely applied to bonding with a liquid adhesive, and in this case, it can also be applied to fitting the second member to the outside of the cylindrical part of the first member. etc., can be implemented with various changes without departing from the gist.

[Effect of the invention] As explained above, according to the adhesive device of the invention, while rotating one of the first and second members, the two liquids are applied to the peripheral surface fitted to the other member. It consists of an application mechanism that applies the product separately in the direction, and an assembly mechanism that fits one member coated with two liquids to the other member, which prevents nozzle clogging and improves productivity. Moreover, just by fitting the first and second members together, the two liquids can be brought into an adhesive and mixed state and penetrate between the fitting surfaces of the first and second members, which is generally sufficient. It is possible to obtain excellent effects such as being able to secure adhesive strength and prevent problems of poor adhesion.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a side view of the main parts, Fig. 2 is a front view of the whole, Fig. 3 is a partial sectional view when applying two liquids, and Fig. 4 is a partial sectional view of the application of the two liquids. FIG. 3 is a longitudinal cross-sectional view of a state in which a rotor yoke and a permanent magnet are bonded together. In the figure, 1 is a rotor yoke (first member), 2 is a permanent magnet (second member), 5 is a coating mechanism, 6 is an assembly mechanism, 7 is a transfer device, 10 is a slide plate, 1
2 is a pneumatic cylinder, 13 is a pneumatic cylinder for lifting and lowering,
14 is a rotary actuator, 16 is a rotating shaft, 18 is a pulse motor, 19 is a claw, 23 is a pneumatic cylinder, 24, 25 are tanks, 24a, 255
a is a nozzle.

Claims (1)

[Scope of utility model registration request] A first member having a cylindrical portion and a second member fitted into the cylindrical portion of the first member are bonded using a two-component adhesive, wherein the first and second members are bonded together using a two-component adhesive. an application mechanism that rotates one of the members and applies two liquids to the circumferential surface fitted to the other member while separating the two liquids in the axial direction; An adhesive device comprising an assembly mechanism that fits into a member.