JPH0150461B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a reciprocating device for painting, and in particular, to a reciprocating device for painting, in which a slider to which a coating machine is attached is moved in the direction of transport of an object to be painted, such as an automobile body, which is transported at a required speed. This invention relates to a painting reciprocating device that is driven orthogonally back and forth and is used to apply uniform coating to the top or side surface of an object to be painted.

[Prior art and its problems]

Conventionally, this type of reciprocating equipment for painting has an endless chain in which a slider to which a painting machine is fixed is interposed between two sprockets arranged in parallel at a required distance from each other horizontally or vertically.
By rotating the sprocket in forward and reverse cycles, the paint machine fixed to the slider is driven back and forth between the sprockets.

If the slider on which the coating machine is fixed is simply driven back and forth between the sprockets regardless of the shape or size of the object to be coated, the coating machine will not only move wastefully, resulting in poor work efficiency, but also Since there is a problem that unnecessary spraying increases coating loss and contaminates surrounding equipment, conventionally the stroke of the slider is selected depending on the coating width of the object to be coated.

That is, the motor that rotates the sprocket is controlled to rotate forward and reverse at predetermined timings according to the stroke of the slider, thereby preventing paint from being wasted.

However, in this case, the control mechanism of the motor becomes very complicated, and at the same time, an excessive load due to inertia is applied to the motor, the rotating shaft of the sprocket, the chain, etc. when the motor is reversed, and the durability of the device is impaired. It was hot.

[Purpose of the invention]

Therefore, the present invention eliminates the need for complicated control in which the motor for driving the slider is rotated forward and reverse at a predetermined timing as in the past, and the slider can be moved in a relatively simple manner by simply rotating the motor in one direction. It is an object of the present invention to provide a reciprocating device for painting that can be driven reciprocally according to the stroke and at the same time can greatly improve the durability of the device.

[Structure of the invention]

In order to achieve this object, the present invention provides a painting reciprocating device configured to drive a slider to which a coating machine is attached reciprocatingly orthogonally to the transport direction of the object to be coated. A reciprocating slider crank mechanism is provided as the means, and the pairing point of the crank constituting the mechanism and the connecting rod connecting the crank and the slider is a screw pair, and the length of the crank is changed by rotation of the screw. The present invention is characterized in that the stroke of the slider is adjustable by changing the length of the slider.

〔Example〕

Hereinafter, the present invention will be explained based on specific embodiments shown in the drawings.

FIG. 1 is a front view of a reciprocating device for painting according to the present invention, FIGS. 2 and 3 are a right side view and a left side view, respectively, and FIG. 3 is a plan view showing the main parts thereof.

In the figure, 1R and 1L are frames erected on opposite sides of the transfer rail 4 on which the trolley 3 carrying the object 2 to be coated runs, and 5R and 5L are fixed to the frames 1R and 1L, respectively. The provided vertical rails 6 have both ends connected to the vertical rails 5R and 5L.
Sliders 7R and 7 are slidably engaged with the sliders 7R and 7, respectively.
This is a horizontal rail fixed to L.

This horizontal rail 6 is connected to the vertical rails 5R and 5 by a cylinder 8 fixed upright on the frame 1R.
The chain sprocket mechanism 9R and 9L are arranged at both ends thereof as shown in FIGS. 2 and 3, and have the configuration described below.

That is, sprockets 10R and 12R, 10L and 12 are installed above and below both ends of the horizontal rail 6, respectively.
L is arranged and the upper sprocket 10
Sprocket 11R, 11L behind R, 10L
are arranged in parallel, and sprockets 10R-11R-12R, 10L-11L are installed from the upper edge 6a of the horizontal rail 6.
Chains 13R and 13L are stretched across the lower edge 6b of the horizontal rail 6 via -12L to form chain sprocket mechanisms 9R and 9L. The sprockets 10R and 10L are formed to have the same diameter and are rotatable in the same direction by a transmission shaft 15 via ball joints 14, 14.
The horizontal rail 6, which is suspended by chains 13R and 13L and can be moved up and down, is maintained in a horizontal state.

16 runs rollers 17, 17... on the horizontal rail 6.
The so-called slider is a slider that is guided and slid by a slider, on which the coating machines 18, 18 are fixedly installed facing downward, and a connecting rod 20 that connects with a crank 19, which will be described later, is rotatably attached. A crank mechanism is constructed so that it can be driven back and forth on the horizontal rail 6.

The crank 19 is configured to rotate within the frame 1R and within a vertical plane parallel to the horizontal rail 6.
A crankshaft 21 vertically passes through the horizontal rail 6 and is supported.

Further, the pairing points of the crank 19 and the connecting rod 20 are screwed pairs, so that the length of the crank 19 can be changed by rotation of the screws. That is, a long hole 22 is bored in the crank 19 along its longitudinal direction, and a support 23 that rotatably supports the end of the connecting rod 20 is slidably disposed in the long hole 22. At the same time, a threaded rod 24 that is threadedly engaged with the support body 23 extends in the longitudinal direction within the elongated hole 22, and as the threaded rod 24 rotates, the connecting rod 2
A support body 23 supporting the crank 19 is configured to move along the longitudinal direction of the crank 19.

Note that 25 is a motor for rotating the threaded rod 24.

In FIG. 3, reference numeral 30 denotes a motor that reciprocates the slider 16 to which the coating machines 18, 18 are fixed, and which is fixed to the frame 1L and is connected to a crank via a speed reduction device 31, a propeller shaft 32, and a gear device 33. 19 to rotate.

The speed reducer 31 includes a worm gear 34, a worm wheel 35, and an output shaft 36,
Transmission belts 37 and 38 are stretched between the motor 30 and the worm gear 34 and between the worm wheel 35 and the output shaft 36, respectively, and the output shaft 36 is arranged parallel to the horizontal rail 6.

The propeller shaft 32 is a cylindrical shaft 32
a and a shaft 32b that is removably inserted into the shaft 32, and both shafts 32a and 32b are connected to each other by a key 32c and a keyway 32d.
(shown in FIG. 4) so that rotation can be transmitted by being telescopically engaged.

One end of the propeller shaft 32 is connected to the output shaft 36 via a universal joint 39, and the other end is connected to a gear device disposed at the rear end of the crankshaft 21 via a universal joint 40. 33 input shaft 41.

The gear device 33 includes a bevel gear 42 fixed to the tip of an input shaft 41 disposed perpendicular to the crankshaft 21 and parallel to the horizontal rail 6, and a bevel gear 42 fixed to the rear end of the crankshaft 21. The rotation of the propeller shaft 32 is transmitted to the input shaft 41 via the universal joint 40, and the rotation is further transmitted to the bevel gears 42, 4.
3 to the crankshaft 21 to rotate the crank 19.

Note that 43R and 43L are frames 1R and 43L, respectively.
Balance weights 44R and 44L suspended from 1L to offset the weight of the horizontal rail 6 are protective nets.

The above is an example of the configuration of the painting reciprocating device according to the present invention, and the operation thereof will be explained next.

First, by driving the cylinder 8, the horizontal rail 6
is moved upward or downward to a required height depending on the height of the object 2 to be coated.

At this time, for example, if the right end of the horizontal rail 6 moves upward by the required distance, the chain 13R will rotate the sprocket 10R clockwise as seen in Figure 2, and in response, the sprocket 10L will rotate counterclockwise. The left end of the horizontal rail 6 is thus also moved upward by the same distance, so that the horizontal rail 6 is always maintained in a horizontal state.

At the same time, the output shaft 36 of the deceleration device 31 and the gear device 33 generated by the vertical movement of the horizontal rail 6
As the distance between the input shafts 41 changes, the propeller shaft 32 expands and contracts.

When the motor 30 is driven, its rotational force is transmitted to the crankshaft 21 via the reduction gear device 31, propeller shaft 32, and gear device 33.
The rotational movement of the crank 19 is transmitted to the slider 16 via the connecting rod 20, so that the slider 16 is driven back and forth on the horizontal rail 6.

Here, the connecting rod 20 is rotatably supported by the crank 19, and the crankshaft 21 of the crank 19 is
If the distance between the support body 23 and
Therefore, it is possible to coat the object 2 having at least a width of 2R.

Therefore, in this state, while reciprocating the slider 16, the coating machines 18, 18 are supplied with paint and sprayed, and at the same time, the object 2 to be coated having a width of 2R is placed on the trolley 3 running on the rail 4. If you transfer it,
A predetermined coating can be applied to the upper surface of the object 2 to be coated.

When a relatively narrow object 2 to be coated is transferred, the motor 25 fixed to the crank 19 is driven to rotate the threaded rod 24 in the screwing direction. The stroke of the slider 16 can be adjusted to become smaller by sliding the threaded support 23 toward the crankshaft 21 to shorten the length of the crank 19.

Conversely, if a wide object 2 is being transferred, the motor 25 is reversed and the crank 19 is rotated.
By increasing the length of the slider 16, the stroke of the slider 16 can be adjusted to be larger.

Here, if the support body 23 is brought closer to the crankshaft 21 by an amount r, the support body 23 rotates with a radius of (R-r), so the stroke of the slider 16 becomes (2R-2r).

Therefore, the coating width is set to D depending on the object 2 to be coated.
If you want to change the distance by D/2, you only need to slide the support 23 by D/2.

As described above, according to the present invention, a slider-crank mechanism is adopted to drive the slider 16 to which the coating machines 18, 18 are fixedly attached, reciprocatingly orthogonally to the direction in which the object to be coated 2 is transported. motor 3
It is only necessary to rotate the motor in one direction, thus eliminating the need for complicated forward/reverse cycle rotation control of a motor as in the past, allowing for a simple configuration and at the same time improving the durability of the device. Can be done. Further, the support body 2 rotatably supports the connecting rod 20 by appropriately rotating the motor 25 in forward and reverse directions.
3 along the longitudinal direction of the crank 19, the length of the crank 19 can be changed and the stroke of the slider 16 can be freely adjusted. You can do this without wasting paint.

In addition, if the horizontal rail 6 that guides the slider 16 is moved up and down by the cylinder 8 as in the embodiment, it is possible to apply it to painted surfaces of different heights such as the bonnet, roof, and trunk of an automobile body. However, uniform coating can be achieved by always adjusting and maintaining the distance from the coating machine 18 at a constant value.

Furthermore, since the motor 30 that drives the crank 19 is fixed to the frame 1L, the horizontal rail 6
It is possible to reduce the weight of the cylinder 8 and reduce the load applied to the cylinder 8.

In addition, in the embodiment, the case where the threaded rod 24 is rotated by the motor 25 has been described, but in the present invention, the case where the threaded rod 24 is rotated manually may also be used.

Furthermore, in the embodiment, a case has been described in which the coating machine 18 is disposed above the object 2 to be painted and driven back and forth in the horizontal direction, but in the present invention, the coating machine 18 is disposed on the side surface of the object 2 to be coated. It may also be a case where it is reciprocated in the vertical direction.

[Operation and effect of the invention]

As described above, since the reciprocating apparatus for painting according to the present invention is equipped with a reciprocating slider crank mechanism as a means for reciprocating the slider to which the atomizer is fixed, the motor that rotationally drives the crank is connected to the reciprocating device. The effect is that it only needs to be rotated in one direction, and there is no need for complex forward/reverse cycle rotation control like in conventional equipment.This allows for a simpler configuration and at the same time improves the durability of the equipment. The advantage is that it can be done.

Further, the pairing point between the crank and the connecting rod connecting the crank and the slider is a screw pair, and simply by rotating the screw, the length of the crank can be changed and the stroke of the slider can be freely moved. Since it is configured to be adjustable, it is possible to spray paint according to the coating width of the object to be coated with a simple operation, and there is an effect that wasteful spraying of paint can be reliably prevented.

[Brief explanation of drawings]

FIG. 1 is a front view of a reciprocating device for painting according to the present invention, FIGS. 2 and 3 are a right side view and a left side view, respectively, and FIG. 4 is a plan view showing the main parts thereof. Explanation of symbols, 1R, 1L...Frame, 2...Object to be painted, 6...Horizontal rail, 16...Slider, 18...
Painter, 19...Crank, 20...Connection rod, 2
1...Crankshaft, 24...Threaded rod, 30...Motor.

Claims (1)

[Claims] 1. A painting reciprocating device configured to reciprocate a slider to which a coating machine is attached in a direction perpendicular to the transport direction of the object to be coated, which is equipped with a reciprocating slider crank mechanism as means for reciprocating the slider. In addition, the pairing point between the crank constituting the mechanism and the connecting rod connecting the crank and the slider is a screw pair, and the length of the crank is changed by rotation of the screw, and the stroke of the slider is changed. A reciprocating device for painting, characterized in that it is configured to be adjustable.