JPH0337736Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a coating device suitable for coating the inner surface of a box-shaped object to be coated.

Problems to be solved by conventional techniques and ideas In recent years, as a device for automatically painting objects to be painted, a nozzle is attached to the tip of an arm that moves in a three-dimensional direction to spray paint. Painting robots have come into use, but when painting the inner surface of a box-shaped object such as a case, it is necessary to make complicated rotational movements of the wrist of the arm on which the nozzle is attached. For this reason, a complicated control mechanism is required, and in particular, painting the inner surface of a long and narrow box-shaped object is done by swinging the arm up and down, but it is difficult to do so by simply swinging the arm. Since the nozzle moves in an arcuate trajectory and the distance between it and the object to be painted changes, which causes uneven coating, the arm should be swung to keep the distance between the object and the nozzle approximately constant. At the same time, it is also necessary to control the forward and backward movement of the arm, and even with such complicated control means, it is still difficult to apply uniform coating.

Means for Solving the Problems As a means for solving the above problems, the inner surface coating apparatus of the present invention moves a reciprocator that reciprocates the elevating body in the vertical direction in the front and rear directions with respect to the object to be coated. A motor and a paint pressure-feeding tube that is driven by the motor and rotates about its axis are mounted on the elevating body, and paint is sprayed at the tip of the paint pressure-feeding tube in the direction of the outer circumference of the paint pressure-feeding tube. In addition, the paint pressure feeding pipe is connected to a paint pressure pump.

Functions and Effects The present invention has the above-described configuration, and when the object to be coated is conveyed to the front of the reciprocator, the reciprocator moves forward and the nozzle enters the inner surface of the object to be coated.
As the elevating body moves, the paint pressure pipe moves up and down, and the paint pressure pipe itself rotates around its axis due to the driving force of the motor.At the same time, paint is supplied to the paint pressure pipe from the paint pressure pump, and mist is produced from the nozzle. The paint is sprayed to coat the inner surface of the object to be coated, and the paint sprayed from the nozzle moves vertically and is swung around the entire circumference of the paint pressure pipe. In particular, the inner surface of an elongated box-shaped object to be coated can be efficiently and uniformly coated without complicated control of the nozzle position.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In the figure, reference numeral 1 denotes a base installed parallel to the conveyance path of the object to be coated. 2, 2, so that the movement along the length direction of the base 1 can be adjusted.Furthermore, on this trolley 3, a reciprocator 7 is installed to move wheels 8 attached to the lower surface of the trolley 3. It is fitted into rails 5, 5 arranged on both side edges, and is movable in the front and rear directions perpendicular to the conveyance path of the object to be coated by operating a handle (not shown).

This reciprocator 7 has a reversible motor 10 attached to the bottom plate of an elongated box body 9, and a belt between a drive pulley 11 fixed to its output shaft and a driven pulley 13 of a reducer 12 also attached to the bottom plate. 14 is spanned, and this reducer 12
A first drive chain 19 is stretched between a sprocket 15 fixed to the output shaft of the box body 9 and one sprocket 18 fixed to a shaft 17 freely rotatably spanned between the front plate and the rear plate of the box body 9. and the other sprocket 21 fixed to this shaft 17,
A shaft 22 rotatably supported above this shaft 17
The second sprocket 23 is fixed to the
A drive chain 24 is spanned therebetween, and the other sprocket 25 is fixed to the shaft 22.
An endless chain 27 is stretched between a sprocket 26 that is pivotally supported directly above the sprocket 25, and a pair of vertical guide rails 29, 2 are placed outside both straight running parts of the endless chain 27.
9 are arranged and attached by frames 30, 30 that are passed between the front plate and the rear plate of the box body 9, and on the front side of these guide rails 29, 29, an elevating plate 31 is installed on the left and right sides. The rollers 32 attached to the top and bottom of both sides are connected to guide rails 29 and 2, respectively.
A connecting tool 33 is fitted into the vertical chain 9 and supported so as to be freely movable in the vertical direction, and is fixed to the rear surface of the lifting plate 31. A horizontal support rod 35 is attached to the front surface, and both ends thereof are connected to vertical holes 36, 3 formed in the front edges of both side plates of the box body 9.
Both ends of a mounting rod 37, which is bent into a substantially U-shape and crosses the front surface of the box body 9, are attached to both ends of the support rod 35 by means of fittings 38, 38, respectively. The center of a vertically elongated lifting rod 40 is attached to the center of the mounting rod 37 with a fixture 41, and the endless chain 27 runs in one direction or the opposite direction by driving the reversible motor 11 in the forward or reverse direction. The lifting rod 40 is configured to reciprocate in the vertical direction at a constant stroke in the front surface of the reciprocator 7.

As shown in detail in FIG. 2, blocks 43 are attached to both the upper and lower ends of the lifting rod 40 with fixtures 44, and each block 43 has an attachment rod 45 whose tip is bent at a right angle. At the tip of each mounting rod 45, there is a paint spraying device A,
A is installed, and this paint injection device A has a mounting portion 4 protruding from the rear surface of a main body 46 having a circular box shape.
7 is fixed to the above-mentioned mounting rod 45, and a rotary cylinder 48 is supported on the front surface of the main body 46 so as to freely rotate around the axis, and is connected to the output shaft of an air motor 49 attached to the rear surface of the main body 46 by gears. A paint pressure feeding pipe 50 is integrally connected to the tip of the rotary cylinder 48, and the paint pressure feeding tube 50 has an outlet facing forward and an outlet perpendicular to the outlet. The inlet of a cross-shaped branch pipe 51 having three outlets facing both sides is connected to the branch pipe 51. A nozzle 52a is connected to the forward facing outlet of this branch pipe 51, and a nozzle 52a is connected to each of the two outlets on both sides.
b, 52c are attached, and furthermore, this paint pressure feeding pipe 50 is connected to one end of a paint hose 53 attached to the main body 46 so as to be able to pump paint, and the other end of the paint hose 53 is connected to a paint pressure pump (not shown). It is connected to the.

Next, the operation of this embodiment will be explained.

When the lifting rod 40 is at the upper end of its stroke and the reciprocator 7 is retracted backward on the trolley 3, as shown in FIG. When the reciprocator 7 is suspended from the hanger b of the conveyor running and conveyed to the front of the reciprocator 7 and stopped, the reciprocator 7 is moved forward by operating the handle. The group enters the inside of the object a with the upper nozzle group 52 positioned above the object a.

In this state, when the reversible motor 11 and both air motors 49 are started and highly pressurized paint is supplied from the paint pressure pump through the paint hose 53, both paint pressure feed pipes 50 are moved as the lifting rod 40 is lowered. While descending, both paint pressure feeding pipes 50 rotate around their respective axes together with the rotary cylinder 48, and atomized paint is sprayed from each nozzle 52, and each of the upper and lower groups of nozzles 52 faces forward. Nozzle 52
The bottom surface of the object to be coated a is mainly painted with the paint sprayed from a, and the two nozzles 52b on both sides,
The paint sprayed from 52c mainly targets the object a
The inner surface of the nozzle 5 is painted, and the lifting rod 40 is lowered to the lower end of the stroke and the lower nozzle 5 is painted.
When the second group reaches the lower position inside the object a, the reversible motor 11 rotates in the opposite direction, and both paint pumping pipes 50 rise in the opposite direction and rotate around their axes. The inner surface of the paint is coated, and the coating is completed when both paint pressure feeding pipes 50 have reciprocated once to several times.

When the painting is completed, the reciprocator 7 is moved backward to bring both groups of nozzles 52 out from the inside of the object a, and as the conveyor continues to run, the object a that has been completely painted is sent to the next one, and a new one is sent. The object to be painted a is transported to the front of the reciprocator 7, and the same operation as described above is repeated.

Note that the number of paint spraying devices A is not limited to the two shown in the above embodiment, but may be one, for example, when painting an object that is not very long, or three.
If a large number of them are provided, painting can be performed more efficiently.

Furthermore, the configuration of the nozzle group 52 is also different from that in the third embodiment.
The present invention is not limited to a configuration in which the jet is ejected in the opposite direction; for example, a configuration in which only one of the nozzles 52b and 52c on both sides is used, or a configuration in which a nozzle with a large jet angle is used for these and the nozzle 52a facing forward can be removed. Also good.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of an embodiment of the present invention;
FIG. 2 is a partially enlarged perspective view showing the state of the painting work. 5: Rail, 7: Reciprocator, 40: Lifting rod, 49: Air motor, 50: Paint pressure feeding pipe, 52
a, 52b, 52c: nozzle.

Claims (1)

[Scope of utility model registration request] A reciprocator that reciprocates an elevating body in the vertical direction is installed so as to be movable in the front and rear directions with respect to the object to be coated, and a motor and a paint pressure pipe that is driven by the motor and rotates around an axis are mounted on the elevating body. An internal surface coating device, characterized in that a nozzle for spraying paint in an outer circumferential direction of the paint pressure-feeding tube is attached to the tip of the paint pressure-feeding tube, and the paint pressure-feeding tube is connected to a paint pressure-feeding pump.