JPS6359368A - Nozzle moving mechanism of coater - Google Patents

Abstract

PURPOSE:To enhance the simplification and safety of a moving mechanism, by a method wherein the drive source of X-axis and Y-axis moving means is provided outside a coating chamber and high pressure air is introduced into the coating chamber to isolate said chamber from the outside air, and a chain and a sprocket are combined in Y-axis movement. CONSTITUTION:Compressed air regulated in its pressure is blown in a box body 13 receiving motors 11, 12 being X-axis and Y-axis drive sources from an introducing pipe 16 and the box body 13 is sealed from an external atmosphere. When work is started under this state, trucks 5a, 5b being X-axis moving means move on spline shafts 7a, 7b by driving the motor 11 because chains 8a, 8b are fixed to fixing metal jigs 10a, 11b. In a Y-axis moving means, by allowing a chain 3 fixed at the start end thereof to run in the right or left direction through a sprocket 2, a rack 1 can be slid to a predetermined position by guide arms 4a, 4b.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a nozzle moving mechanism for a coating device, and more particularly to a nozzle moving mechanism for a coating device that air-seals a drive source.

[Conventional technology]

It has long been widely practiced to quantitatively display the nozzle position of a coating device using two coordinate axes, the X-axis and the Y-axis, and to move the nozzle by controlling the two axes, the X-axis and the Y-axis. and
Various devices and mechanisms for this purpose are also provided. A general outline of a movement mechanism based on two-axis control of the X-axis and Y-axis, which is generally used in painting apparatuses, will be briefly described.

As for the movement mechanism of the coating device, movement along either the X or Y axis is carried out on a guided traveling mechanism such as a rail, or by being suspended in a U-shape, and movement along the other axis is carried out by Most of them include means for moving orthogonally above the moving mechanism.

FIG. 4 is a diagram showing the above-mentioned moving mechanism. To explain the X-axis moving means, rails 102 are laid on both sides of the Y-axis, and a cart 101 moves on the rails. An electric motor 103 for driving the cart is disposed on the cart 101, and is movable in the X-axis direction according to instructions from a control section. Movement is performed by precise driving of electric motor 103. On the other hand Y
The axis moving means includes a guide member 104 that is horizontally installed between carts 101 serving as Y-axis moving means, and an electric motor 106 that drives a chain attached to a frame 105 that moves on the guide member 104. Similar to the Y-axis, movement is performed by precise driving of the electric motor 106. The nozzle of the coating device is attached to the above-mentioned pedestal 105, and the movement position of the pedestal 105 is determined by controlling the movement of the pedestal 105 on the Y axis and two Y axes.

[Problem that the invention seeks to solve]

As mentioned above, the conventional nozzle movement mechanism in painting equipment was carried out by precise driving of electric motors mounted on carts or frames that were used to move the Y-axis and the Y-axis, so painting using organic solvents, etc. It was necessary to use materials that could withstand the indoor environment. In other words, the electric motor serving as the drive source must be explosion-proof, and the wiring system for power supply must also be equipped with special explosion-proof equipment. For this reason, the use of the above-mentioned explosion-proof member has made the electric motor large and heavy, making the moving means bulky and making the structure of the nozzle moving mechanism complicated and bulky.

The present invention was created in order to solve the above-mentioned problems, and an object of the present invention is to provide a nozzle moving mechanism for a coating device that has a simple configuration and is excellent in safety and operability.

[Means for solving problems]

In order to achieve the above object, in a painting apparatus equipped with a traveling mechanism for movement in a painting room, there is provided a pedestal on which a nozzle is erected and moves on a guide arm, a dolly part that supports the guide arm, and a dolly part that supports the guide arm. X-axis moving means for winding and driving a band-shaped movable member attached to the frame, and Y-axis movement for driving a band-shaped movable member that is wound around a plurality of sprockets arranged on the pedestal and the truck portion. and an air passage through which air at a pressure slightly higher than atmospheric pressure is introduced into the driving source of the moving means.

[Effect]

By using the above means, the movement of the pedestal to which the nozzle is attached in the X-axis direction is performed by controlling the rotation of the sprocket that wraps around the band-shaped movable member attached to the cart mounted on the moving traveling mechanism. Similarly, movement in the Y-axis direction is achieved by moving a band-shaped movable member wrapped around multiple sprockets fixed to the frame to the right or left by controlling the rotation of the sprocket of the drive source. This is done by sliding. The driving sources for the Y-axis and the Y-axis moving means are housed outside the painting room, and are isolated from the outside air by introducing high-pressure air.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing the entire embodiment, and FIG. 2 is a plan view. First, the configuration of the embodiment will be explained.

As shown in FIGS. 1 and 2, the painting room of the painting apparatus of the present invention is equipped with a substantially square painting stand, and walls and ceilings are provided with corridors projecting inward on all four sides. Is there a ball spline shaft (hereinafter abbreviated as spline shaft) in the corridor part A? a,
7b is constructed, and carts 5a and 5b, which are X-axis moving means, are held on the spline shafts 7a and 7b by bosses 6a and 6b and bosses 5c and 5d, respectively, which fit into the spline shafts. The cart 5a and the cart 5b are opposed and firmly supported by guide arms 4a and 4b formed into spline shafts in the same manner as described above. The carts 5a and 5b are provided with fixing fittings 10a and 10b on their outer surfaces (wall surfaces), respectively, to securely attach chains 8a and 8b, which are band-shaped movable members. The movement of the carts 5a, 5b on the X axis is controlled by chains 3a, 3b. The chains 3a and 3b have a shaft 9a to which sprockets 7 and 8c and 8e are attached, and a sprocket 8.
The spline shaft 7 is connected by the shaft 9b to which the shafts d and 8f are attached.
a and along the spline shaft 7b. The above shaft 9a
is supported by bearings 9c and 9e, and shaft 9b is supported by bearing 9d.
, 9f.

The bearings 9c and 9e are provided with adjusters for adjusting the tension of the chains 8a and 8b to maintain a suitable tension state.

The X-axis moving means is driven by a drive output shaft of a reducer 11a connected to the shaft 9b. A connecting portion between the speed reducer 11a and the shaft 9b, which is disposed outside the wall of the corridor A, is separated from the painting room by a sealing member 11C through the wall portion. The speed reducer 11a is driven by a drive shaft of an electric motor 11, which is a drive source, and a chain. A servo motor is suitable for the electric motor 11 because of ease of control and precision.

As shown in the sectional view taken along the line A-A in FIG.
Guide arm 4 machined into a spline shaft supporting b
a and 4b movably support the pedestal 1. The pedestal 1 slides on the guide arm 4b by means of bosses 1a and lb that fit onto the spline shaft.

A hole is provided in the center of the pedestal 1 in the vertical direction, and the nozzle 1
4 will be erected. On the pedestal 1, an air motor I5 for rotationally driving the nozzle 14 is provided by a support frame 15a, and sprockets 2a and 2g serving as Y-axis driving means are arranged. The sprockets 2a and 2g are disposed on the center line of the pedestal 1, facing each other at equal distances from the center, and are pivoted to the pedestal 1.

On the other hand, sprockets 2b and 2c are disposed on the upper surface of the trolley 5a in the same manner as described above, facing each other at equal distances from the center on the center line of the trolley 5a, and sprockets 2f and 2h are similarly arranged on the upper surface of the trolley 5b. Ru. The chain 3 has its starting end fixed to a stopper 3a firmly fixed to the wall surface, and is provided with a sprocket 2b.

2a, 2c, 2d, 2e, 2f, 2g, and 2h, and the terminal end is fixed to the wall surface with a fastener 3b.

The electric motor 12 that is the Y-axis drive source is the electric motor 1 that is the X-axis drive source.
Similarly to 1, a servo motor is suitable.

As shown in the sectional views taken along the line B-B in FIGS. 1 and 3, the drive shaft of the electric motor 11, which is the drive source for the X-axis, is connected to the drive input shaft of the reducer 11a by a chain, and the Two drive axes with different ratios are output. One side above X
The electric motor 12, which is the drive source for the Y-axis, is installed on a mounting floor that is one step higher than the mounting floor on which the drive source for the shaft is arranged. drive The reduced drive output shaft of the speed reducer 12a protrudes vertically through the floor surface from a hole drilled in the mounting floor surface,
Sprokef) 2e is attached to the shaft. The floor penetrating portion of the drive output shaft of the speed reducer 12a is isolated from the painting room and the outside air by a seal member 12e, and a sprocket 2e rotatably attached to the drive output shaft is rotated to drive the Y-axis moving means.

The electric motor 11 and the reducer 11a, which are the X-axis drive source, and the electric motor 12 and the reducer 12a, which are the Y-axis drive source, are arranged close to each other, and are surrounded by a box 13 within the inner and outer walls. be exposed. Movement control of the carts 5a and 5b of the one-way X-axis moving means and the frame I of the Y-axis moving means is performed by a control device (not shown), and control is performed so that the movable range is not exceeded, but double safety measures are taken. The movable range is set using a limit switch. In this embodiment, the remaining one of the two drive output shafts of the reduction gear alla transmitted to the X-axis drive source is connected to the drive input shaft of the reduction gear 11b.

A disc lid that simulates the X-axis movement range is attached to the drive output shaft of the speed reducer 11b.

The moving range of the X-axis is limited by determining the notch shape of the disc lid and the fixed position of the limit switch 17a. Similarly, on the Y axis, the sprocket 1 is attached to the reducer 12a.
2d drives the reducer 12b, and a disk 12C for simulating the Y-axis movement range is attached to the drive output shaft of the reducer 12b. The range of movement of the Y-axis is limited by determining the notch shape of the disc 12c and the fixed position of the Mitswitch 17b. A pipe 16 for introducing compressed air is installed into the box 13, and compressed air whose pressure is regulated to be slightly higher than atmospheric pressure is introduced to create an air seal between the inside of the box 13 and the outside air, thereby creating isolation. .

A spray gun 14 is located below the nozzle 14 erected on the pedestal 1.
a and 14b are suspended by the support rod 14c, and the painting table C
The entire surface is movable. The painting table C is movably attached to casters and is configured to be able to be pulled out from the painting room.

The operation of the embodiment of the present invention configured as above will be explained.

The required paint is supplied to the nozzle 14 erected on the pedestal 1 from a paint supply device (not shown) at a suitable pressure. Pressure-regulated compressed air is blown from the introduction pipe 16 to the box 13 housing the electric motors (servo motors) that are the driving sources for the Y-axis and the Y-axis, air-sealing the box 13 from the outside atmosphere. ing. With this air seal, the drive source electric motor (servo motor), the limit switches 17a and 17b that control deviation from the movable range, and the disc 11d,
The safety circuit, which uses a simulation based on the combination of 12C, is cut off from highly flammable organic solvents and paints.
Increased safety.

Next, a command to move the Y-axis and the Y-axis is issued from a control device (not shown), and the carts 5a and 5b, which are the X-axis moving means, firmly attach the chains 8a and 8b with the fixing metal fittings 10a and 10b. Since the motor 11 is rotated, the motor 11 moves on the spline shafts 7a and 7b. In addition, in the Y-axis moving means, when the chain 3 whose starting end is fixed to the wall surface runs, for example, to the right when viewed from above by the rotation of the drive sprocket 2e, the sprocket 1- Rotate 22 clockwise.

As a result, the chain 3 is connected to the frame l via the sprocket 2f.
The upper sub-block 1-2g is rotated counterclockwise, and the pedestal 1 slides on guide arms 4a and 4b formed into spline shafts toward the side of the trolley 5a. When the nozzle 14 of the frame 1 stops at the commanded movement position, the spray gun 1
A command to apply paint is issued by 4a and 14b, and painting is performed.

Further, the nozzle 14 is rotated by an air motor 15 as necessary. The control device that issues the above movement command is
Numerical control by program is possible.

The present invention is not limited to this embodiment, and can take various embodiments. For example, the belt-shaped movable member is not limited to a chain, and a double-edged double timing belt may be used. It goes without saying that this method can be applied and implemented in various other ways.

〔Effect of the invention〕

As explained above, by using the present invention, the Y axis,
The Y-axis movement mechanism can be isolated from the drive source, and the drive source and a compactly simulated safety circuit are housed together in a box and sealed with compressed air to isolate it from the outside, ensuring safety. Sexuality increases. Since the drive source is not mounted on the moving mechanism, and the moving mechanism is constructed using a single chain and a combination of sprockets for Y-axis movement, the moving mechanism becomes a surface element, can be constructed lightweight, and the drive By adopting a servo motor as the source,
The control mechanism is simplified.

As a result of the above effects, the nozzle moving mechanism of the coating device is created with a simple configuration and excellent operability and safety.

[Brief explanation of the drawing]

FIG. 1 is a plan view, FIG. 2 is a sectional view taken along line A-A in FIG. 1, FIG. 3 is a sectional view taken along line B-B in FIG. 1, and FIG. 4 is a block diagram according to the prior art. It is a diagram. Symbols with a square mark in the figure indicate the following ■... Frame 2... Sprocket (Y-axis moving means) 3... Chain (Y-axis moving means) 4a, 4b... Guide arm (Y-axis moving means) Means) 5a,
5b...Dolly (X-axis moving means) 7a, 7b...Spline shaft 8...Chain (X-axis moving means) 10a, 10b...Fixing bracket 11...Servo motor (X-axis drive source) 12... Servo motor (Y-axis drive source) 13... Box 14
...Nozzle 16...Compressed air introduction pipe Patent applicant World Giken Co., Ltd. Agent Patent attorney Zoji Isono Michi (1. Figure 3)

Claims (3)

[Claims] (1) In a coating device in which the coating room is equipped with a moving mechanism and the nozzle movement position is determined by determining the coordinate position of the X axis and the Y axis perpendicular to the a pedestal for moving the guide arm; a cart portion for supporting the guide arm; an X-axis moving means for winding and driving a band-shaped movable member attached to the cart portion; A Y-axis moving means for driving a band-shaped movable member wound around a sprocket, and an air passage through which air at a pressure slightly higher than atmospheric pressure is introduced into the driving source of the moving means. Nozzle movement mechanism of coating equipment. (2) A nozzle moving mechanism for a coating device according to claim 1, wherein the band-shaped movable member is a chain. (3) A nozzle moving mechanism for a coating apparatus according to claim 1, wherein the drive source of the moving means is disposed outside the coating room.