JPH0566295B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention involves spray painting the product in a first coating booth while vertically feeding the product, and then horizontally feeding the product at regular intervals. The present invention relates to an interval feeding device used for horizontally feeding the product to be coated in a coating facility that spray-paints previously uncoated surfaces using a second coating booth.

[Prior art and its problems] For example, in order to paint box-shaped products, when the products are continuously inserted into a painting booth using a conveyor, sufficient paint spraying by the painting nozzle is required so that the paint is not left unpainted. It is necessary to send products at appropriate intervals. However, if sufficient spacing is provided according to the side height of the product, there will be a problem that there will be a lot of unnecessary spraying of paint that does not cover the product, resulting in low coating efficiency, and a problem that the inside of the painting booth will become extremely dirty.

In order to improve this, as shown in Figure 7,
Product A is conveyed vertically by the vertical conveyor 1, and only the side surfaces thereof are coated in advance in the first coating booth 2, and then,
Transversely conveyed by the horizontal conveyor 3 to the second painting booth 4
One possibility is to paint the remaining surface. According to this method, it is possible to paint the products at narrow intervals, but the products are pooled on the lateral conveyor 3 and kept at narrow intervals in accordance with the coating speed, that is, the product feeding speed in the coating booth. It is not always easy to send data in an aligned state.

As a means for feeding the products in such a manner that they are pooled and arranged at narrow intervals, for example, a chucking device may be provided, and this chucking device may grip the individual products and arrange them at regular intervals. In the case of a device, the operation is continuous due to the gripping operation, and there are problems in terms of smoothness of product feeding and reliability of operation.

[Means for Solving the Problems] The present invention, which solves the above-mentioned problems, spray-paints the products to be coated in a first coating booth while vertically feeding them, and then horizontally transports the products to be coated at regular intervals. An interval feeding device used for horizontally feeding the product to be coated in a coating equipment that spray-paints a previously unpainted surface using a second coating booth while feeding the product, the device being used for horizontally feeding the product to be coated in a direction perpendicular to the vertical feeding direction. It has a conveyor conveying in the lateral direction, a parallel part along this conveyor, an upward slope part connected to this parallel part, a top part, and a downward slope part, and has an annular shape in a plane perpendicular to the conveyance direction and above the conveyor. A plurality of spacers are provided on the spacer guide so as to be movable in the longitudinal direction, and the spacers are dropped one by one along the spacer guide near the entrance of the device and are sequentially placed on the conveyor. A spacer insertion device that is inserted into the back side of the product to be coated; and the spacer that has come off from between the products to be coated near the exit of the device is moved to the top through the upward slope of the spacer guide, and is then allowed to fall naturally along the downward slope. a spacer return device that returns the spacer to the spacer insertion device; a spacer return device that returns the spacer that has come off between the products to be coated near the exit of the device to the spacer insertion device; and the products to be coated are pooled on the conveyor. As shown in FIG.

[Function] In the above configuration, the product to be painted that is vertically fed and spray-painted in the first painting booth has unpainted surfaces (incompletely painted surfaces) on the front and rear surfaces thereof. The product to be coated is turned in the right angle direction and then transported across by a transport conveyor. The product to be coated sent on this conveyor is slowed down by the feed control means near the exit of the device, and the product to be coated sent later catches up with the product to be coated in front, so that the product to be coated is transferred to the conveyor. pooled on top.

On the other hand, the spacer that moves the spacer guide is
Starting from the spacer insertion device near the entrance of the device, the spacer falls sequentially along the spacer guide to its parallel portion, and is inserted behind the product to be coated that is being fed. This spacer is not driven, and since the product to be coated sent from behind catches up with the product to be coated in front, the spacer is sandwiched by the next product to be coated that is sent from behind. Therefore, each product to be coated is pooled on the conveyor and sent in alignment with the spacer spacing. The products to be painted are sent in this aligned state to the second painting booth and spray painted, and the unpainted surfaces in the first painting booth are spray painted.

At the exit of the device, the spacer is pressed against the product to be coated and guided by the spacer guide.
It comes off from between the products to be coated, moves to the top through the upward slope of the spacer guide by the spacer return device, and returns to the spacer insertion device side at the device entrance by falling naturally along the downward slope.

[Example] Hereinafter, a first example of an interval feeding device of the present invention will be described.
This will be explained with reference to FIGS.

FIG. 1 is a schematic side view of the interval feeding device, and FIG. 2 is a plan view. The interval feeding device of this embodiment is installed as the lateral conveyor 3 in the painting line shown in FIG. 7 mentioned above.

Although the pedestal (frame) of the apparatus is not shown in each figure, a conveyor 11 consisting of, for example, four rows of roller chains 11a in the direction of the coating booth is provided on the pedestal (not shown) of the apparatus. 11b indicates the axis of the sprocket of the roller chain 11a.
Reference numeral 12 denotes a proximity sensor that detects a product to be coated (hereinafter abbreviated as "product") A sent on the conveyor 11.

Above the conveyor 11, there is a parallel portion 13a, an upwardly inclined portion 13b, a top portion 13d, and a downwardly inclined portion 13c along the conveying direction (direction of arrow A), forming an annular shape in a plane perpendicular to the conveying direction. A spacer guide 13 is provided. The spacer guide 13 has a C-shaped cross section as shown in FIG. 5, and a plurality of spacers 14 are movably provided on the spacer guide 13. This spacer 14 is
As shown in FIG. 6, it has a roller 14a for running within the spacer guide 13, and a protrusion 14b in the middle. This protrusion 14b is inserted between the products and defines the product interval. Note that the product interval may be the minimum dimension necessary to dry the paint applied to the side surface of the product.

As shown in FIG. 3, an air cylinder 1 is located near the end of the spacer guide 13 near the device entrance.
5 and a stopper 16 connected to the tip of the piston rod of the air cylinder 15. The stopper 16 has a jaw 16a that engages with the protrusion 14b of the spacer 14, and is rotatable about a shaft 16b.

Further, as shown in FIG.
A vane 18 is provided which can rotate only clockwise in the figure about 8a. This feather 18
allows the spacer 14 to move forward and prohibits the spacer 14 from moving backward. In addition, the upward slope portion 13 of the spacer guide 13
A belt conveyor 19 for conveying the spacer 14 to the guide top portion 13d is arranged at b. 19a indicates the shaft of the pulley around which the belt conveyor 19 is wound. This belt conveyor 19,
The vanes 18 and the like constitute a spacer return device.

Furthermore, a conveyor 1 is located near the exit of the device.
A discharge conveyor 20 is provided which partially overlaps the front end of the conveyor belt 1 in the feeding direction. This discharge conveyor 20
is the same as the coating speed, that is, the product feeding speed within the coating booth, and rotates at a speed slightly slower than the feeding speed of the conveyor 11. 20a indicates the shaft of the sprocket around which the discharge conveyor 20 is wound. This discharge conveyor 20 is used as a coating conveyor for feeding products into the coating booth 4. Further, above the discharge conveyor 20, a V-belt 21 for feeding control is arranged, which rotates at a speed synchronized with the discharge conveyor 20 and feeds the product on the discharge conveyor 20 while pressing it down. 21a indicates the shaft of the pulley around which the V-belt 21 is wound. Note that the lower inner peripheral position of this V-belt 21 is as shown in FIG. A reduction adjustment device 22 for pressing the V-belt 21 against the product
is provided. This reduction adjustment device 22 has a large number of rollers 22b arranged on the lower surface of a plate 22a, although only a part is shown in the figure, and a screw 22c.
The V-belt 21 can be moved up and down by turning the screw 22c to adjust the pressing strength of the V-belt 21 against the product. The discharge conveyor 20, V-belt 21, reduction adjustment device 22, etc. constitute a feed-out control means.

The operation of the interval feeding device configured as described above will be explained. The product A that has been conveyed on the vertical conveyor 1 shown in FIG. 7 has already been painted on both sides in the width direction by the first coating booth 2. This side-painted product is kicked out from the vertical conveyor 1 to the conveyor 11 of the interval feed device, and is sent on the conveyor 11 with the painted side facing backward in the feeding direction of arrow A. When the product reaches the position shown in FIG. 3, the proximity sensor 12 detects the product, and this detection signal causes the piston rod of the air cylinder 15 to rise, and the stopper 16 connected to the tip to rotate in the direction of the arrow B. For this reason, the spacer 1 that was held by the jaws 16a of the stopper 16
4 loses its restraint, falls along the spacer guide 13 to its parallel portion 13a, and comes behind product A as shown by the two-dot chain line. This spacer 14 is not driven, and as will be described later, the products are pooled on the conveyor 11 and the product sent from behind catches up with the product in front, so the spacer 14 is used for the next product sent. be caught. This operation is repeated each time the product passes. On the other hand, at the exit of the device, the speed of the discharge conveyor 20 is slower than the speed of the transport conveyor 11, and the products on the discharge conveyor 20 are conveyed while being pressed by the V-belt 21 for feed control, so the products are always transported. , and are pooled on the conveyor 11 while being pushed by the products behind. In this way, the products being sent are pooled on the conveyor 11 and sent in an aligned state with the spacing between the protrusions 14b of the spacers 14.

On the other hand, the spacer 14, as shown in FIG.
The parallel part 13a of the spacer guide 13 is detached from the product at the end thereof, and is pushed by the next spacer 14, so that the end arc-shaped part 13e of the spacer guide 13 is successively pushed up. In this case, the blade 18, which can rotate only in the forward direction, prevents backward movement. The spacer 14 that has been successively pushed up and has reached the upper side of the end arc-shaped portion 13e of the spacer guide 13 is carried up the upward slope portion 13b on the belt conveyor 19, and after reaching the top portion 13d of the spacer guide 13, It naturally falls down the downward slope 13c and is held by a stopper 16 at the entrance of the device. In this way, the spacer 14 is repeatedly cycled and used for defining product spacing.

Regarding the spacing between products after the spacer 14 is removed from between the products, the products are sent on the discharge conveyor 20 while being held down by the V-belt 21 for delivery control, so even if the products are pushed by the product behind them, The products are fed while maintaining the spacing with the spacer 14 interposed therebetween, thereby preventing the products from coming into contact with each other. Therefore, scratches on the painted surface due to contact between products are prevented.

As described above, the products being kicked out one after another onto the conveyor 11 have their sending speed controlled by the discharge conveyor 20 and the V-belt 21, and are pooled on the conveyor 11, while being
They are sent out to the painting booth side in an aligned state with an interval of 4. Therefore, in the painting booth, paint can be sprayed on products that are sent at narrow, regular intervals, eliminating unnecessary scattering of paint, improving coating efficiency, and reducing the amount of dirt in the painting booth. .

[Effects of the Invention] As explained above, according to the present invention, the conveyor has a parallel portion along the conveyor, an upwardly sloped portion connected to the parallel portion, a top portion, and a downwardly sloped portion, and within a plane perpendicular to the conveyance direction and Spacers are movably installed in an annular spacer guide above the transport conveyor, and the spacers are sequentially inserted between the products to be coated by a spacer insertion device, and the spacers that have come off from the products to be coated are removed from the products to be coated at the exit side of the device. The spacer return device moves the spacer guide to the top through the upward slope, and returns it to the spacer insertion device side by natural fall at the downward slope.
Furthermore, at the exit of the device, the delivery of the products to be coated is controlled by a delivery control means, so that the products to be coated can be pooled on the conveyor and fed at narrow regular intervals smoothly and reliably. became possible. The structure is simple, consisting of a non-driven spacer that utilizes the movement of the product to be coated, and this spacer has a simple annular structure with a parallel part, an upwardly inclined part, a top part, and a downwardly inclined part. It moves while being guided by a spacer guide, and the above smooth and reliable operation can be achieved with inexpensive equipment.

First, the product to be coated is vertically fed to pre-coat both sides of the product, and then, using the interval feeding device of the present invention, the product is pooled and fed horizontally at narrow intervals to coat the remaining surfaces. This makes it possible to improve coating efficiency and reduce dirt inside the coating booth.

[Brief explanation of the drawing]

FIG. 1 is a side view of a spacer feeding device showing an embodiment of the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is an enlarged explanatory view of the vicinity of the spacer insertion device at the entrance of the device.
Figure 4 is an enlarged view of the vicinity of the device outlet;
The drawings are an enlarged sectional view taken along the line -- in FIG. 1, FIG. 6 is a side view of a spacer, and FIG. 7 is a plan view of a painting line, showing an example of equipment to which the present invention is applied. 11... Conveyor, 13... Spacer guide, 14... Spacer, 16... Stopper, 17
...Spacer insertion device, 18...Blade, 19...
Belt conveyor (spacer return device), 20...
Discharge conveyor, 21... V-belt for feeding control (feeding control means).

Claims (1)

[Scope of Claims] 1. After spray painting is performed in a first coating booth while vertically feeding the product to be coated, a second coating booth removes any unpainted parts while horizontally feeding the product to be coated at regular intervals. An interval feeding device used for lateral feeding of the product to be coated in a painting facility that performs surface spray painting, comprising: a conveyor that feeds the product to be coated in a horizontal direction perpendicular to the vertical feeding direction; a spacer guide having a parallel part, an upward slope part connected to the parallel part, a top part, and a downward slope part, and forming an annular shape in a plane perpendicular to the conveyance direction and above the conveyor; A spacer insertion device that drops the spacers one by one along a spacer guide near the device entrance and sequentially inserts them into the back side of the products to be coated on a conveyor. a spacer return device that moves the spacer that has come off from between the products to be coated near the outlet to the top through the upward slope of the spacer guide, and returns it to the spacer insertion device side by natural fall along the downward slope; 1. An interval feeding device comprising a feed-out control means for controlling feeding of products to be coated at an outlet of the device so that the products to be coated are pooled on a conveyor. 2. The feed control means includes a discharge conveyor disposed on the exit side of the interval feed device so as to partially overlap with the conveyor, and a product to be coated on the discharge conveyor that is pressed from above and controlled at the same speed as the discharge conveyor. 2. The interval feeding device according to claim 1, further comprising a belt for feeding control which revolves around the belt.