JPH0323328Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an apparatus for applying two types of paint using two application devices, and can be particularly used for applying a sealer.

[Prior Art] FIG. 3 is a perspective view schematically showing an upper and lower two-axis device for applying paint (sealer), which is an example of the prior art. As shown in FIG. 3, the device controls the movement of two racks by a feeding mechanism such as two motors. That is, a servo motor 1 rotates in response to a position command signal, a rack 5 that moves up and down by meshing with a pinion (not shown) connected to the shaft of the servo motor 1, and an A mounted on the lower end of the rack 5. A type sealer valve gun unit (applicator) 8, a servo motor 2 that rotates in response to a position command signal, a rack 6 that moves up and down by meshing with a pinion (not shown) connected to the shaft of the servo motor 2, and It consists of a B type sealer valve gun unit (applicator) 9 attached to the lower end of the rack 6. Now, when applying type A sealer and type B sealer to one workpiece in sequence, the apparatus operates as follows. That is, when the A-type sealer is applied, the rack 5 moves downward to position the valve gun unit 8 near the workpiece. On the other hand, the rack 6 and valve gun unit 9 are moved upward so as not to interfere with the application of the A type sealer. Furthermore, the movements of the racks 5 and 6 when the B type sealer is applied are completely reversed.

[Problems to be solved by the invention] However, in the conventional device described above, when applying sealer, it is sufficient to control the movement of one rack, so two motors, etc. are required to control the movement of two racks. Providing a mechanism is wasteful.

The present invention was devised in view of the above circumstances, and attempts to control the movement of two racks using one feeding device.

[Technical means for solving the problem] The two-axis paint application device according to the present invention includes an electric motor that rotates in response to a position command signal, a pinion connected to the shaft of the electric motor, and a pinion that meshes with the pinion. This is a two-shaft sealer application device consisting of two racks installed side by side, which move in opposite directions, and application tools each attached to the tip of the racks.

The configuration requirements will be explained below.

The electric motor may be direct current or alternating current. Moreover, reversible operation is possible. The position command signal may be an analog signal or a digital signal.

The control system that inputs the position command signal to control the rotation of the electric motor may be open loop or may have a position feedback loop.

Furthermore, as the pinion and rack used in the present invention, conventionally known pinions can be used.

A pinion connected to the motor shaft meshes with the racks such that rotation causes the two racks to move in opposite directions.

As the applicator, those conventionally used for applying paint, such as a spray gun unit, a valve gun unit, etc., can be used.

[Operations and Effects] In the present invention, a pinion connected to the shaft of one electric motor controls the movement of two racks meshed with the pinion. That is, when applying paint with one applicator, the other applicator moves in the opposite direction around the pinion, so that the other applicator does not interfere with the paint application of the other applicator. Never. Also, 2
Since the two racks are engaged with the pinion so as to move in opposite directions, for example, if the loads of the two racks and the applicator attached to the racks are approximately the same, the pinion can be moved clockwise or counterclockwise. Do not apply any force that would cause it to rotate. Therefore, the torque required to move the rack is constant regardless of the direction of rotation of the pinion; for example,
When moving the rack vertically, the motor output can be made smaller than when moving one rack, and the motor capacity can be made smaller.

Furthermore, in the present invention, one of the feeding mechanisms can be omitted, compared to conventional devices in which the movement of the two racks is controlled by two feeding mechanisms such as electric motors. Therefore, it is possible to significantly reduce costs and the area occupied by the device.

[Embodiment] FIG. 1 is a perspective view schematically showing an embodiment of the present invention. FIG. 2 shows the state of meshing of the rack and pinion in this embodiment. As shown in FIG. 1, the present invention includes a DC servo motor 1 with a reducer,
A pinion 3 (not shown) connected to the middle of the shaft of the servo motor 1, and a rack 5 and a rack 5, which are meshed in parallel with each other at both ends connecting the diameter of the pinion 3 as shown in FIG. Rack 6, brake mechanism 7 attached to the shaft tip, A type valve gun unit 8 attached to rack 5, and B attached to rack 6.
A type valve gun unit 9, a rotary encoder 10 for detecting the position of the rack, and a position command signal are input, and the DC servo motor 1 is activated according to the deviation between the signal and the position signal indicated by the output signal of the rotary encoder 10. It is composed of a driving NC control device (not shown).

Hereinafter, sealer A is applied to one workpiece using A type valve gun unit 8, and sealer B (mastic) is applied to one workpiece using B type valve gun unit 9.
The operating state of the embodiment apparatus will be explained when attempting to apply . First, the servo motor 1 moves the A type valve gun unit 8 to a predetermined position for applying sealer A to the workpiece.
Rotates clockwise (C, W,) at a predetermined number of rotations.
At this time, the rack 5 moves downward and places the A type valve gun unit at a predetermined application position.
Also, the rack 6 is moved upward so that the B type valve gun unit 9 does not interfere with the application.

Next, with the B type valve gun unit 9,
When applying sealer B to the workpiece, the servo motor 1 rotates counterclockwise (C, C, W,), and the rack 6 moves downward and the rack 5 moves upward.
Place each applicator in place.

(Effects of Example) In this example, two racks, each having a coating device attached thereto, are meshed with a pinion connected to the shaft of one servo motor. Therefore, only one mechanism is required to control the movement of the rack, and the cost of the apparatus is reduced compared to the conventional two-shaft apparatus for applying sealer, and the area occupied by the apparatus is small. Furthermore, maintenance can be improved and running costs can be reduced. Further, in this embodiment, as shown in FIG. 2, racks are meshed so as to be suspended from both ends of one pinion. Therefore, no force is applied to rotate the pinion due to the load of the rack and the valve gun unit supported by the rack, and the torque required to move the rack does not change with respect to the direction of rotation. do not have. Therefore, the capacity of the servo motor can be reduced compared to the conventional case where one rack is suspended. Furthermore, if a servo motor with the same capacity is used, the positioning speed of the applicator can be improved, and it is thought that the backlash and the like that occur over time can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view schematically showing an example of an embodiment of the present invention. FIG. 2 shows the state of meshing of the rack and pinion in this embodiment. FIG. 3 is a perspective view schematically showing an upper and lower two-axis device for applying sealer, which is an example of a conventional technique. 1... Servo motor, 5, 6... Rack, 7...
... Brake, 8, 9 ... Valve gun unit, 1
0...Rotary encoder.

Claims (1)

[Claims for Utility Model Registration] (1) An electric motor that rotates in response to a position command signal, a pinion connected to the shaft of the electric motor, and a pinion that meshes with the pinion and moves in mutually opposite directions;
A two-shaft device for coating paint, comprising: two racks; and coating devices each attached to the tips of the racks. (2) The two-axis paint applicator according to claim 1, wherein the two racks move vertically. (3) The two-shaft device for coating paint according to claim 1, wherein the number of the pinion is one. (4) The two-axis paint application device according to claim 1, wherein the loads applied to the two racks are substantially the same.