JPH027707B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a dispenser device for applying an adhesive between an object to be adhered, such as a screw, and a member to be fastened to which the screw is provided.

[Technical background of the invention and its problems]

A conventional dispenser device has a configuration as shown in FIG. In the figure, 1 is a robot, and this robot 1 is provided with a plurality of arms 2 that are rotatable in a horizontal plane. These arms 2...
The most advanced arm 2a is provided with a vertical shaft 3 that is vertically movable. A flange 4 is provided at the lower end of this vertical shaft 3. Further, a syringe 5 is attached to this flange 4 and is parallel to the vertical axis 3 . An adhesive 6 for screw locking is contained inside the syringe 5. An air hose 7 is connected to the upper part of the syringe 5, and high pressure air is blown into the syringe 5 for a certain period of time in response to a signal from the controller 8, through the opening of a nozzle 9 connected to the syringe 5. The adhesive 6 is injected and the screw head 1 of the screw 11 provided on the top surface of the member 10 to be fastened and the member 10 to be fastened is
1a.

In order to lock the screw using the conventional dispenser device configured as described above, first, the most advanced arm 2a equipped with the vertical shaft 3 is positioned, and then the vertical shaft 3 is lowered and the tip of the nozzle 9 is moved above the vertical shaft 3. It is brought into contact with the periphery of the screw head 11a. High pressure air is then blown into the syringe 5 via the controller 8 to inject a fixed amount of the adhesive 6 from the nozzle 9. Then, the vertical shaft 3 is raised, the robot 1 is moved, and the screw is locked to the next point.

By the way, in the conventional dispenser device, after injecting the adhesive 6, the nozzle 9 is raised in the axial direction, so the adhesive 6 rises together with the nozzle 9, so the amount of the adhesive 6 is reduced by that amount, and the screw lock is reduced. There is a disadvantage that not only the strength is reduced, but also the adhesive 6 pulled up by the upward movement of the nozzle 9 becomes thread-like and adheres to the upper surface of the product, reducing the reliability of the product.

In the above-mentioned conventional dispenser device, the vertical shaft 3 and the nozzle 9 are installed perpendicularly to the fastened member 10 of the product, but as shown in FIGS. 3a and 3b, the nozzle 9 is installed at an angle. However, when the nozzle 9 is pulled up in the axial direction, the adhesive 6 is pulled up in the same way as in the case of FIG. 2b, and the disadvantage that the adhesive 6 becomes thread-like and adheres to the upper surface of the product remains unsolved.

[Purpose of the invention]

This invention was made in consideration of the above circumstances, and its purpose is to provide a dispenser device that improves the reliability of the product by improving the cutting of adhesive when pulling up the nozzle. It is.

[Summary of the invention]

In this invention, an air cylinder is provided inclined with respect to a vertical shaft supported movably in the vertical direction, and parallel to and between the piston shaft driven by the air cylinder. This device is equipped with a syringe that stores adhesive as a screw locking agent inside through an elastic body, and a nozzle connected to this syringe through which the adhesive flows.The nozzle is tilted with respect to the workpiece. After the adhesive is injected from the nozzle, the vertical shaft is raised to improve the cutting of the adhesive and prevent stringing.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 4 to 6.
This will be explained with reference to the figures. Reference numeral 21 in FIG. 4 is a robot, and this robot 21 is provided with a plurality of arms 22 that are rotatable in a horizontal plane. The most advanced arm 22a of the plurality of arms 22 is provided with a vertical shaft 23 so as to be movable in the vertical direction. A mounting portion 24 is integrally formed at the lower end of the vertical shaft 23, and a cylinder, for example, an air cylinder 25 is attached to the mounting portion 24.
It is designed to be fixed at an angle to the
An air hose 26 is attached to the upper part of the air cylinder 25.
one end is connected. The other end of the air hose 26 is connected to a high pressure air conduit piped inside the arm 22a at the tip. A piston shaft 27 driven by the air cylinder 25 is connected to the lower part of the air cylinder 25. A U-shaped displacement shaft 28 is provided at the bottom of the piston shaft 27 . This displacement shaft 28 has the piston shaft 2
A displacement shaft movable portion 29 is fitted therein and is movable in the vertical direction via a support shaft 28a provided parallel to the shaft 7. The length of this displacement shaft movable portion 29 is longer than the length of the displacement shaft 28, and a compression coil spring 30 as an elastic body is provided between the displacement shaft 28 and this displacement shaft movable portion 29, as shown in FIG. It is guided by the support shaft 28a and always urges the displacement shaft movable portion 29 downward. A syringe 31 is fixed to the arm portion 29a of the displacement shaft movable portion 29 so as to be parallel to the piston shaft 27, and an adhesive is housed inside the syringe 31. Further, a nozzle 32 for discharging adhesive is connected to the lower part of the syringe 31, and one end of an air hose 33 is connected to the upper part. The other end of this air hose 33 is connected to a high pressure air conduit inside the arm 22a. This high pressure air pipe line is connected to a controller 34,
Via this controller 34, high pressure air is turned on and off to the air hoses 26, 33 connected to the high pressure air pipeline. Further, the air cylinder 25 has a speed controller 35.
is provided, and by adjusting the moving speed of the piston shaft 27, the moving speed of the nozzle 32 interlocked therewith can be adjusted.
Further, the piston shaft 27 of the air cylinder 25 protrudes from the upper and lower ends of the air cylinder 25, respectively, and the upper end has a movable plate 36 as shown in FIG. 6, and the lower end has a lower movable plate 37. are each fixed. On the other hand, an upper mounting plate 38 and a lower mounting plate 39 are provided at both upper and lower ends of the air cylinder 25, respectively, and a shock absorber 4 is provided between these two mounting plates 38 and 39.
0, 40 and a stopper 41 are attached. Additionally, a sensor 4 is installed on the side of the air cylinder 25.
2 is provided to detect that the piston shaft 27 has descended to the lower end.

Next, the operation of this dispenser device configured as described above will be explained as shown in FIGS. 4 to 6 above.
This will be explained with reference to FIG. The arm 22 of the robot 21 is rotated in a horizontal plane, and the most advanced arm 2
The vertical shaft 23 provided on the member 2a is positioned directly above the screw head 44a of a screw 44 provided on a member 43 to be fastened as a product to be adhered. Next, the controller 34 is operated to send high pressure air to the air cylinder 25 and lower the piston shaft 27. The upper movable plate 36 fixed to the upper end of the piston shaft 27 descends together with the piston shaft 27, comes into contact with the shock absorber 40, and is decelerated. 43 and screw head 44a of screw 44
comes into contact with. Even after the tip of the nozzle 32 hits the application point in this manner, the piston shaft 27 further descends, and the upper movable plate 36 comes into contact with the stopper 41 and stops. That is, the compression coil spring 30 as an elastic body installed between the displacement shaft 28 and the displacement shaft movable part 29 is compressed to its limit, and the nozzle 32 is pressed against the screw head by a constant pressing force due to the compression coil spring 30. 44a. When the sensor 42 detects that the piston shaft 27 has descended to the lower end in this way, a signal is transmitted to the controller 34, and high-pressure air flows into the syringe 31 through the air hose 33, discharging the adhesive in the syringe 31. 45 is discharged from the opening of the nozzle 32. After that, when the vertical shaft 23 is raised several mm, the nozzle 32 is moved by the compression coil spring 3.
Since it is pressed by an elasticity of 0, the nozzle 32
The tip of the nozzle 32 rises while contacting the screw head 44a, but as it rises along the vertical axis 23, the tip of the nozzle 32 projects downward at the moment it is released from the screw head 44. Therefore, no stringiness occurs in the adhesive 45, and the adhesive 45 is not pulled up together with the nozzle 32. Then, the piston shaft 27 further rises to complete one cycle, and the screw locking is repeated at a large number of points.

In the above embodiment, the syringe 31 and the nozzle 32 that contain the adhesive are integrated and provided at the tip of the air cylinder 25, but the syringe 31 and the nozzle 32 are not limited to this. 3
2, and the syringe 31 is connected to the arm 22, for example.
a, and only the nozzle 32 may be provided at the tip of the air cylinder 25 and the adhesive may be supplied via a hose. Further, although the robot 21 is used to position the vertical shaft 23, the present invention is not limited to the robot, and other automatic positioning devices may be used. Further, the form of the robot is not limited, and any type may be used as long as it has a vertical axis, such as a rectangular coordinate type or a cylindrical coordinate type.

〔Effect of the invention〕

As explained above, in the present invention, the piston shaft is driven by providing a cylinder inclined with respect to a vertical axis that is movable in the vertical direction, and by driving the piston shaft, an internal space provided parallel to the cylinder is provided. A syringe containing adhesive for thread locking and a nozzle connected to this syringe are provided so as to be constantly pressed against the object by an elastic body.
After the nozzle is brought into contact with the object to be adhered, when the vertical axis is raised, the nozzle protrudes forward and shakes off the adhesive, preventing the adhesive from being pulled up and stringing, increasing the screw locking strength and tightening the thread. Product reliability is improved because the applied adhesive does not adhere to the top surface of the product. In addition, the vertical axis positioning is performed by moving the arm, and the syringe is moved vertically by the cylinder, which reduces work time, reduces man-hours, and reduces equipment costs. can be achieved. Furthermore, since the nozzle is configured to come into contact with the object to be adhered with a constant pressing force through the elastic body, it is possible to prevent an accident in which the tip of the nozzle is damaged.

[Brief explanation of drawings]

FIG. 1 is a front view showing a conventional dispenser device, FIGS. 2 and 3 are action explanatory diagrams of the conventional dispenser device, FIG. 4 is a front view showing an embodiment of the present invention, and FIG. 5 is a front view showing a conventional dispenser device. Similarly, FIG. 6 is a side view of FIG. 5, and FIG. FIG. 7 is an explanatory diagram of the operation of this invention. 23... Vertical axis, 25... Air cylinder (cylinder), 27... Piston shaft, 30... Compression coil spring (elastic body), 31... Injector, 32
... Nozzle, 43, 44, 44a ... Member to be fastened, screw, screw head (object to be adhered).

Claims (1)

[Claims] 1. A cylinder supported movably in the vertical direction and inclined with respect to the vertical axis, a piston shaft provided in the cylinder that is movable in reciprocation, and a piston shaft movable parallel to the piston shaft, and a nozzle for applying adhesive that is always urged toward the object to be adhered by an elastic body, a syringe that communicates with this nozzle to supply adhesive, and a syringe that moves the piston shaft forward to discharge the adhesive from the nozzle. A dispenser device comprising control means for vertically raising the nozzle by the vertical axis after applying the adhesive to the object to be adhered.