JPH0999266A - Automatic coating apparatus for head parts of small articles - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic coating apparatus for head parts of small articles which eliminates the stagnation of the small articles in a line from a parts feeder through a coating and drying apparatus to ejection of coated articles and is capable of automatically executing coating, baking and drying of the head parts of the small articles with good productivity. SOLUTION: This apparatus consists of a coating section transporting means 5 which transports the screws 1 delivered from the parts feeder 2, the coating apparatus 15 which is disposed above the means, a baking and drying furnace 21 which is disposed behind the apparatus and a drying section transporting means 18 which introduces the screws 1 transported from the coating section transporting means 5 through the baking and drying means 5 to an ejecting means. The coating section transporting means 5 and the drying section transporting means 18 are disposed parallel by opening a prescribed spacing so as to form grooves 7, 20 capable of housing the threaded parts of the screws 1 in at least the transporting route of the screws 1. These means are respectively composed of a pair of synchronously moved endless belts 6a, 6b, 19a, 19b and transport the screws 1 according to their movement while housing the threaded parts of the screws 1 into the grooves between the belts and supporting the head parts in an exposed state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic head coating device for small articles such as screws and notion parts (buttons, etc.), and more specifically, it is constructed so that only the head of a small article having a shaft portion can be coated. The present invention relates to an automatic coating apparatus for small articles which is automated from the parts feeder to the coating / drying apparatus and then unloading the coated article.

[0002]

2. Description of the Related Art A screw part such as a screw is processed with high dimensional accuracy so that it can be screwed into a screw hole of a target object into which the screw is screwed. Becomes larger and requires more power than necessary. If you force it in, the screw part will break. Therefore, it is desired to paint only the head part excluding the screw part. On the other hand, even in notion parts and the like, it may be desired to paint only the head part in order to change the colors of the shaft part and the head part and improve the design. In the case of coating only the head of such a small article, conventionally, the small articles are manually arranged in a tray at substantially equal intervals, and thereafter, spray painting is performed from the upper surface side, followed by baking and drying. There is.
However, in such a method, it takes a lot of time to align the small articles on the tray, and there is a problem in workability and cost. Therefore, in recent years, it has been desired to automate these series of processes, that is, the process line from the supply / transportation of articles to the coating / baking / drying.

The present applicant has developed an automatic head coating apparatus for small articles as shown in FIG. 5 as an apparatus for automatically performing the steps from supply / transportation of small articles to coating / baking / drying. Have already filed (Japanese Patent Laid-Open No. 6-170319).
issue). This device will be described with reference to FIG. 5. First, an automatic loading device 120 of a type in which a bucket 122 having an opening at the top is fixed to a conveyor 121 arranged in the vertical direction is loaded into the parts feeder 102. The screw 1 is sent from the delivery port 105 of the parts feeder 102 through the chute 106 to the coating section conveying means 108. The parts feeder 102 is a vibrating parts feeder, and a passage 104 having a spiral gentle upward slope is formed on the inner peripheral wall of the ball 103, and the screw 1 moves toward the upper part of the passage 104 while performing a bouncing vibration. Will be transferred. The connection point between the upper end of the passage 104 of the parts feeder 102 and the upper end of the chute 106 is the parts feeder 102.
Is located in the ball 103 of the
4 Screw part 1b of screw 1 transferred to the upper end
The screw 1 that has entered the groove 107 of the chute 106 and is seated on the chute 106 descends on the chute 106 and is sent to the coating section conveying means 108.
The screw 1 that has not entered 7 falls into the parts feeder 102, and the same operation as above is repeated again.

As described above, the groove 107 of the chute 106
The screw 1 in which the screw portion 1b is inserted and seated is the chute 106.
And is sent to the coating section conveying means 108. The coating section conveying means 108 is composed of a straight advance feeder 109 on which a rail 110 is arranged, and is supported substantially horizontally on the rail 110 of the straight advance feeder 109 while the screw portion 1b is accommodated in the groove portion 111 of the rail 110. A spraying device (coating machine) 112 spray-paints the screws 1 which are sequentially fed from above. At this time, the head 1a of the screw 1 is attached to the coating device 1
Although it is exposed to 12, the screw portion 1b enters the groove portion 111 of the rail 110 of the straight feeder 109 and is shielded from the coating device 112, so that only the head portion 1a of the screw 1 is coated. Will be seen. As described above, the screw 1 sent out by the coating section conveying means 108 is sequentially transferred on the guide rail 113 in a state where the screw section 1b is accommodated in the groove section 114, and is dried while passing through the baking / drying oven 115. After baking, the screw 1 is screwed into the groove 117 of the discharge guide rail 116 in the same manner as described above.
In the state where b is accommodated, it is sequentially transferred on the discharge guide rail 116 and loaded on the carry-out container 118, and the carry-out container 118 is carried out on the container rail 119.

[0005]

However, when a small article having a shaft portion is coated by using the above-mentioned apparatus, the coating material sprayed from the coating apparatus 112 and adhered to the rail 110 of the linear feeder 109, or The paint attached to the screw 1 itself prevents the screw 1 from smoothly moving on the rail 110 of the straight feeder 109 or further on the guide rail 113. In the worst case, the screw 1
However, there is a problem in that the screw 1 sticks to the rail 110 of the straight feeder 109 or further to the guide rail 113 and becomes stagnant, and the screws 1 that are sequentially transferred stop there, and the process stops. Therefore, it is always necessary to monitor, and the paint adhering to the rail 110 and the guide rail 113 of the straight feeder 109 should be wiped off with a solvent such as thinner, or the screw 1 stuck on the rail should be removed by hand. Therefore, there was a problem that work efficiency and productivity were poor.

Therefore, an object of the present invention is to solve the problems in the conventional automatic head coating apparatus for small articles as described above, and to provide a small article in a processing line from a parts feeder to a coating / drying apparatus to carry out a coated article. It is an object of the present invention to provide an automatic head coating device for small articles, which is capable of automatically supplying and transporting small articles and continuously performing coating and baking / drying for a long time without stagnation. Further, an object of the present invention is to provide a fully automated small article that can be installed in a relatively small installation area, does not require constant monitoring, and can significantly improve work efficiency and productivity with a small number of workers. To provide an automatic head coating device.

[0007]

In order to achieve the above object, according to the present invention, there is provided an automatic coating device for a head of a small article having a shaft portion, which is a part feeder and a small part fed from the part feeder. A chute for receiving the articles and sending them to the coating section conveying means, a coating section conveying means for sequentially transferring the small articles received from the chute, a coating device provided above the coating section conveying means, and a coating apparatus provided after the coating apparatus. In the automatic head coating device for a small article, which comprises: a drying device, and a drying part conveying means arranged so as to guide the small article transferred from the coating part conveying means to the discharging means via the drying device. The section conveying means and the drying section conveying means are arranged in parallel at a predetermined interval so as to form a groove capable of accommodating the shaft portion of the small article at least in the conveyance path of the small article, and are moved in synchronization. It is composed of a pair of guide bodies, and the shaft portion of the small article is accommodated in the groove between the pair of guide bodies and is supported with the head exposed, so that the small article is conveyed as the guide body moves. An automatic head coating device for small articles is provided.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The automatic head coating apparatus for small articles according to the present invention uses a conventional straight feeder and guide rails as a coating section transporting means and a drying section transporting means to vibrate the screws on the rails. It is not a conveyance method of advancing while moving forward and sequentially transferring, but is arranged in parallel at a predetermined interval so as to form a groove capable of accommodating the shaft portion of the small article at least in the conveyance path of the small article, and is synchronous. A pair of guides that are moved to each other, the shaft of a small article is housed in the groove between the pair of guides, and the head is supported in an exposed state, and the small articles are conveyed as the guides move. It is characterized by doing so. Therefore, small articles can be reliably and smoothly conveyed, and the small articles are stagnate on the rails or guide rails of the straight feeder and are sequentially transferred due to the paint adhered to the rails or the paint adhered to the small articles as in the past. There is no problem that the incoming small products stop there and the process stops, and it is possible to fully automate the entire processing line from the supply of small products to painting, drying, and unloading, thus improving work efficiency and productivity. Can be significantly improved.

Further, in the apparatus of the present invention, a chute for receiving the small articles sent from the parts feeder and sending them to the coating section conveying means, a coating section conveying means for sequentially conveying the small articles received from the chute, and a coating section conveying means. The transport path of all lines for mounting and transporting small articles, which is constituted by a drying section transporting means arranged so as to guide the small articles transported from the means to the unloading means through the drying device, is the axis of the small articles. It has a groove for accommodating the parts, and these grooves are connected to form a continuous transport path. Therefore, since the small articles are conveyed with their heads exposed while their shafts are accommodated in the grooves of the above-mentioned conveyance path, only their heads can be coated.

In a more specific mode, the guides of the coating section conveying means and the drying section conveying means are composed of a pair of endless belts. The material of the belt is not particularly limited, but the belt of the coating section conveying means is made of silicone rubber or steel (stainless steel) that is strong against paint and cleaning liquid (thinner) when the cleaning device as described later is also installed. It is preferable to use the belt. Further, as the belt of the drying section conveying means, since a small article is conveyed through the drying device, it is preferable to use a belt made of rubber or steel (stainless steel) having excellent heat resistance and heat deformation resistance.

In a preferred aspect of the present invention, an endless belt is used as a guide for the coating section conveying means, and a cleaning device is also provided to wash off the paint adhering to the belt. That is, the guide body of the coating section conveying means is composed of a pair of endless belts which are arranged in parallel at a predetermined interval at least in the conveying path of small articles and which are synchronously moved. A cleaning device is further provided near the conveying means, and the endless belt is passed through the cleaning device for cleaning. The cleaning liquid is not particularly limited as long as it can dissolve the coating material to be used, but various organic solvents, particularly thinner can be preferably used.

The cleaning device can be arranged at the lower part or the side part of the coating section conveying means, and various cleaning methods can be used. A particularly simple and reliable cleaning method is a method in which the endless belt is passed through a cleaning liquid contained in a cleaning tank to elute the paint adhering to the endless belt into the cleaning liquid. In this case, it is preferable to dispose a cleaning liquid removing means such as a wiping material for removing the cleaning liquid adhering to the endless belt on the passage of the endless belt coming out of the cleaning device. Further, instead of the wiping material, a rubber spatula or the like may be provided to drop the cleaning liquid, hot air may be applied to evaporate the cleaning liquid, or a combination thereof may be provided. Further, another method such as a shower method in which a cleaning liquid is sprayed on the endless belt to which the paint is attached can be used.

Further, in a preferred mode of the drying section conveying means, a pair of endless chains which are arranged in parallel at a predetermined interval and which are synchronously moved, and adjacent to each other are provided in the endless chains. A pair of guide bodies is composed of a large number of guide segments that are fixed so as to project radially,
The pair of guide bodies are arranged at predetermined intervals so that the guide segments facing each other form a groove capable of accommodating the shaft portion of the small article. When such a drying section conveying means is used, the roller of the coating section conveying means and the guide body of the drying section conveying means make contact with
The rollers are arranged so as not to interfere with each other, and for example, at least a pair of rollers on the drying section conveying means side among the rollers on which the pair of endless belts of the coating section conveying means are hung in an inverted V shape toward the conveying path. It is preferable that the pair of guides of the drying section conveying means are arranged at an angle, and one end of the pair of guides of the drying section conveying means is arranged close to the lower part of the roller. It should be noted that the present invention is not limited to such an aspect, but is applied to any of the aspects described above. It is preferable to arrange them with a slight inclination so that their heights become lower toward the bottom.

As the coating method, any of electrostatic coating, powder coating, roller coating, air spray coating and the like can be adopted. However, in powder coating, when a small article is heated before coating, a heating device is arranged above the pre-coating chute (or the guide body of the coating section conveying means). Also, as the drying method after painting, room temperature drying, forced drying, baking drying, etc. can be adopted depending on the type of paint used (acrylic resin, urethane resin, fluorine resin, etc. or UV curable paint). Therefore, the drying oven may be designed accordingly. Further, as the drying equipment, a near infrared ray or far infrared ray drying equipment using an infrared light bulb, an infrared heater or the like can be used. Further, a direct or indirect heating type hot air drying equipment using heavy oil, kerosene, gas, steam, electricity or the like as a heat source can also be used.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
The present invention will be described more specifically. FIG. 1 shows a processing line of an embodiment of an automatic head coating apparatus for small articles according to the present invention, and shows a case where a screw is applied as an example of small articles. The screw 1 delivered from the parts feeder 2 descends the chute 3 in a state where the screw portion 1b is inserted and seated in the groove portion 4 of the chute 3 and is fed to the coating portion conveying means 5. The screw 1b sent to the coating section conveying means 5 has a pair of endless belts (guides) 6a whose screw portions 1b are arranged in parallel at a predetermined interval in the conveying path and are moved in synchronization. , 6b are accommodated in the groove 7 between the endless belts 6a and 6b, and the head 1a is supported while being exposed on the upper surfaces of the endless belts 6a and 6b. The head 1 exposed by the coating device 15 from above when passing through the coating position below the coating device 15 installed in the
A pair of endless belts (guides) 19a, which are spray-coated only on a, are then arranged in parallel at a predetermined interval of the drying section conveying means 18 and are moved synchronously.
The threaded portion 1b is housed in the groove 20 between the portions 19b, and the head portion 1a is conveyed while being supported while being exposed on the upper surfaces of the endless belts 19a and 19b, and passes through the tunnel-type baking / drying furnace 21. It is dried and baked. After passing through the baking / drying oven 21, the dried / baked screw 1 descends the discharge guide rail 24 with the threaded portion 1b inserted and seated in the groove 25 of the discharge guide rail 24, as in the conventional case. It is loaded on 26 and carried out. In addition,
The groove portion 4 of the chute 3, the groove 7 between the pair of endless belts 6a and 6b of the coating portion conveying means 5, the groove 20 between the pair of endless belts 19a and 19b of the drying portion conveying means 18, and the discharge guide rail 24. The groove portions 25 are configured to have substantially the same width. Hereinafter, each device of the above processing line will be described.

As the parts feeder 2, conventionally known various types of parts feeders can be used. For example, Japanese Patent Laid-Open No. 6-17031 shown as the above-mentioned prior art.
No. 9, Japanese Utility Model Laid-Open No. 59-68715, Japanese Patent Laid-Open No. 61
The vibrating parts feeder described in JP-A-162471 or the like can be used, and the one using a piezoelectric element instead of the electromagnetic magnet as described in JP-A-63-258311 or the like can also be used. In the present invention, such a parts feeder and various commercially available parts feeders can be used. Further, as a means for supplying the screws 1 to the parts feeder 2, a bucket type automatic feeding device of a type in which a bucket having an opening at the upper portion is fixed to a conveyor arranged vertically as shown in FIG. It can be used, or an appropriate transfer conveyor can be arranged so that one end is located above the parts feeder, or screws can be manually put into the parts feeder.

FIG. 2 is a schematic view of the periphery of the coating section conveying means 5. Above the coating section conveying means 5, a coating device 15 is provided.
However, a cleaning tank 1 containing thinner (cleaning liquid) 17 at the bottom
6 are provided. A pair of endless belts 6a, 6b made of silicone rubber wound around a pair of driving rollers 9a, 9b and a pair of driven rollers 8a, 8b, respectively.
Are four pairs of guide rollers 10a, 10b and 11 respectively.
It is guided by a, 11b and 12a, 12b and 13a, 13b so as to pass through the thinner 17 accommodated in the cleaning tank 16, and is stretched so as not to be bent or loosened. In the conveying path, the driving rollers 9a, 9a are arranged in parallel at a predetermined interval so as to form a groove 7 capable of accommodating the screw portion 1b of the screw 1.
It is rotated synchronously by 9b.

Endless belt 6 exiting from cleaning tank 16
Guide rollers 13 on the respective passage paths of a and 6b
a, 13b and the driven rollers 8a, 8b at a predetermined position, a pair of wiping materials 14a, 14b for wiping the thinner 17 adhering to the endless belts 6a, 6b.
Are arranged in contact with the endless belt. As the wiping materials 14a and 14b, for example, any material can be used as long as it is absorbent to a cleaning liquid such as cloth, non-woven fabric and sponge and has a certain degree of durability.

A drive unit (motor) 3 for the coating section conveying means 5
A pair of driven rollers 8a, 8b synchronously driven by 0a, 30b (see FIG. 4) are arranged in the vicinity of the lower end of the tip of the shout 3, while a pair of driven rollers 9a, 9b are coated under the coating rollers. Similar to the section conveying means 5, a pair of endless belts 19a and 19b are respectively wound between a pair of drive rollers (not shown) synchronously driven by drive devices (motors) 22a and 22b and a pair of driven rollers 23. The driven roller 23 of the drying section conveying means 18 which is rotated and stretched
Are arranged in close proximity. The endless belt 1 of the pair of endless belts 6a, 6b of the coating section conveying means 5 and the upper conveying path of the drying section conveying means 18 from the short 3
In order to ensure that the screws 1 can be conveyed, the screws 9a and 19b are arranged with a slight inclination so that the heights of the screws 1 gradually decrease in the conveying direction.

A pair of driving rollers 9a and 9b and a pair of driven rollers 8a and 8b facing each other of the coating section conveying means 5 are provided.
Surely received the screw 1 sent from the shoot 3,
In order to surely send it to the drying section conveying means 18, and to prevent contact and interference with the driven roller 23 of the drying section conveying means 18, they are respectively arranged in an inverted V shape and inclined toward the conveying path. (See Figure 4). Such a pair of driven rollers 8a, 8b facing each other and a pair of drive rollers 9a,
The inclined arrangement of 9b is also effective for preventing the belt from coming off when the moving direction of the belt is changed as shown in FIG. As in the case of the present embodiment, by disposing the pair of drive rollers and the pair of driven rollers in the inverted V shape, the device can be made compact and useful,
Each roller may be arranged in a V shape or horizontally, and may be provided so as not to interfere with the drying section conveying means or the chute.

If the lower edge of the tip of the shute 3 and the pair of driven rollers 8a and 8b of the coating section conveying means 5 are brought into contact with each other, rotation of the belt is hindered and the belt is worn away. Although it is necessary to install the screw 1, in order to ensure that the screw 1 is transferred from the chute 3 to the endless belts 6a and 6b of the coating section transporting means 5 reliably and smoothly, it is necessary to apply the coating to the lower end of the tip of the shute 3 and the coating. It is desirable that the pair of driven rollers 8a and 8b of the section conveying means 5 are as close to each other as possible. The shape of the tip portion of the shout 3 may be formed in a wedge shape corresponding to the gap formed between the pair of driven rollers 8a and 8b, or the upper surface of the tip portion of the shout 3 may be tapered. Similarly, it is desirable that the lower parts of the driving rollers 9a and 9b of the coating part conveying means 5 and the upper part of the driven roller 23 of the drying part conveying means 18 are as close as possible. Further, the shape of the end portion of the discharge guide rail 24 on the side of the drying section conveying means may be formed into a curved surface shape or an acute angle shape corresponding to the shape of the driving roller of the drying section conveying means 18.

In the automatic head coating apparatus according to the present invention having the above-described structure, the screw 1 that descends the chute 3 and is sent to the coating section conveying means 5 is synchronously rotated by the drive rollers 9a and 9b. It is conveyed along with the movement of the pair of endless belts 6a and 6b, and is sprayed by the coating device 15 from above when passing through a coating position below the coating device 15 installed above the endless belts 6a and 6b. At this time, the head portion 1a of the screw 1 is exposed to the coating device 15, but the screw portion 1b of the screw 1 is housed in the groove 7 between the pair of endless belts 6a and 6b, and Since it is shielded by the coating, only the exposed head 1a is coated. Since the pair of endless belts 6a, 6b of the coating section conveying means 5 are synchronously driven at a constant speed, the paint sprayed from the coating device 15 is locally adhered only to a part on the rail as in the conventional case. This is not the case, and since the screw 1 also moves with the movement of the endless belts 6a and 6b, the screw 1 moves on the conveying path.
There is no such thing as an accumulation and stop.

The pair of endless belts 6a and 6b of the coating section conveying means 5 to which the coating material adheres is cleaned by the guide rollers 10a, 10b and 11a, 11b, respectively.
While being guided inside and passing through the thinner 17, the belt 6
The paint adhering to a and 6b is dissolved in the thinner 17 and dropped. Then, the guide rollers 12a, 12b and 13
The endless belts 6a and 6b are guided by the a and 13b, exit the cleaning tank 16, and are passed between the wipers 14a and 14b provided on the delivery side of the guide rollers 13a and 13b while being sandwiched therebetween. The thinner adhering to is wiped off. When the pair of endless belts 6a and 6b of the coating section conveying means 5 return to the conveying path of the screw 1 by following such a route, the paint and thinner are not attached to the pair of endless belts 6a and 6b. It can be carried out continuously and advantageously.

The screw 1 coated only on the head portion 1a is conveyed together with the endless belts 6a and 6b of the coating portion conveying means 5 in the direction in which the drying portion conveying means 18 is located, and at the relay portion thereof, the coating portion conveying means 5 is provided. Between the pair of endless belts 6a and 6b, which are transferred to the drying section transporting means 18, are also arranged in parallel at a predetermined interval and are synchronously moved. The threaded portion 1b is housed in 20, and the head portion 1a is conveyed while being supported while being exposed on the upper surfaces of the endless belts 19a and 19b, and passes through a tunnel-type baking / drying furnace 21, during which drying / baking is performed. . The endless belts 19a and 19b of the drying section conveying means 18 are synchronously driven at a constant speed, and the screw 1 moves along with the movement of the endless belts 19a and 19b, so that the screw 1 stays and stops on the conveying path. There is no such thing.

3 and 4 show an embodiment using a chain belt type drying section conveying means made of metal (stainless steel). The drying section conveying means 18 'of this embodiment is
A pair of endless chains 41a, 41b, which are arranged in parallel at a predetermined interval and are moved synchronously, and radially project adjacent to each other via fixing plates 42a, 42b. Pair of guide bodies 4 consisting of a number of guide segments 43a, 43b fixed to the
It is composed of 0a and 40b. As shown in FIG.
The pair of guide bodies 40a, 40b are attached to the pair of left and right shafts 51a, 51b of the driven portion 50 by the bearing 5 respectively.
It is wound and stretched between a pair of sprockets 53a and 53b rotatably attached via 2a and 52b and a sprocket of a drive unit (not shown). In addition,
In the drive unit, a sprocket is fixedly attached to the drive shaft, but such a drive device itself is well known, and is not shown. Further, as shown in FIG. 4, each of the facing guide segments 43a and 43b is bent inward so that a groove 20 capable of accommodating the screw portion 1b of the screw 1 is formed between the tip portions thereof.

Further, the pair of drive rollers 9a and 9b facing each other of the coating section conveying means 5 are the same as in the above-mentioned embodiment.
Contact with the guides 40a, 40b of the drying section conveying means 18 '
In order not to interfere with each other, and because the driving devices of the driving rollers 9a and 9b of the coating section conveying means 5 are difficult to vertically arrange due to the driving section 50 of the drying section conveying means 18 'arranged therebelow, they are respectively reversed. It is arranged in a V shape with an inclination toward the transport path (see FIG. 4). For this reason, the drive unit of the coating section conveying means 5 is arranged so as to be inclined in a V shape so as to straddle the driven section 50 of the drying section conveying means 18 ', and each shaft 29a of the pair of drive rollers 9a, 9b ,. 29b is a rotary shaft 31 of drive devices (motors) 30a and 30b, respectively.
a and 31b are connected via couplings 32a and 32b. Step portions 27a and 27b are formed on the outer peripheral edges of the upper portions of the drive rollers 9a and 9b, respectively, and the endless belts 6a and 6b are arranged on the step portions 27a and 27b. Further, fasteners 28a and 28b for preventing the endless belts 6a and 6b from coming off are screwed onto the upper surfaces of the drive rollers 9a and 9b, respectively. It should be noted that the pair of drive rollers 9a, 9
The structures of b and its drive unit are the same in the embodiments shown in FIGS.

In the case of using such metal chain belt type drying section conveying means, as shown in FIG. 3, when the chains 41a and 41b are rotated in the direction of the arrow, the guide body functions as a screw holding section. Since the guide segments 43a and 43b are divided into a large number of guide segments 43a and 43b, the guide segments 43a and 43b are smoothly separated from each other in the rotating portion of the sprockets 53a and 53b, but the screw 1 is not provided in the upper conveying path. When receiving, the guide segments 43a and 43b are adjacent to each other with almost no gap therebetween, and serve as a series of horizontal guides to support and convey the screw 1. Further, by using such a metal belt conveyor type drying section conveying means, it does not deteriorate like a rubber belt even when it is heated by passing through the tunnel type baking and drying oven 21, and it has excellent durability. It becomes a thing.

Although the present invention has been described in detail above by taking the head coating of screws as an example, it should be understood that the present invention is the head of all small articles having shafts other than the screws. Applicable to painting. Also, the basic feature of the present invention is to paint small articles sent from the parts feeder,
As a means for transporting the line from drying to sending it to the head coated article unloading line, it is arranged in parallel at a predetermined interval so as to form a groove capable of accommodating the shaft of the small article at least in the transport path of the small article. Using a pair of guides that are installed and moved synchronously, the shaft of the small article is accommodated in the groove between the pair of guides and is supported with the head exposed. The point is that small articles are conveyed along with the movement, and the design of other individual devices and arrangements can be arbitrarily changed. For example, it is possible to arrange a large number of parts feeders so that each conveying line passes through the same coating device and drying device.

[0029]

As described above, in the automatic head coating apparatus for small articles of the present invention, the coating section conveying means and the drying section conveying means are provided.
At least a pair of guide bodies that are arranged in parallel at a predetermined interval so as to form a groove capable of accommodating the shaft of the small article in the transport path of the small article, and that are synchronously moved, Since the shaft portion of the small article is accommodated in the groove between the pair of guide bodies and is supported in a state where the head is exposed, the small article is conveyed along with the movement of the guide body. Small articles that can be smoothly transported, and small articles that are conventionally transferred due to the paint that has adhered to the rails or the paint that has adhered to the small articles stagnate on the rails and guide rails of the straight feeder as in the past. There is no problem that the process stops there, and the process stops, and it is possible to fully automate the entire processing line from supply of small items to painting, drying, and unloading, resulting in remarkable work efficiency and productivity. It can be above.

Further, since it is possible to apply coating only to the head of a small article and the transport path from the parts feeder to the delivery of the coated article is a single continuous line,
The installation area is small, and in particular, by disposing a plurality of transport paths so as to pass through a single coating device and a drying device, the installation area and the equipment cost can be reduced. further,
The guide body of the coating section transporting means is composed of a pair of endless belts that are arranged in parallel at a predetermined interval at least in the transporting path of the small articles and are moved in synchronization, and By further installing a cleaning device near the endless belt so that the endless belt is passed through the cleaning device for cleaning, the belt is always cleaned during operation. Therefore, it is not necessary to spray thinner and perform manual cleaning. Therefore, the labor, time, and cost required for monitoring during operation, maintenance of the device, etc. can be significantly reduced, and the head of small articles can be automatically and continuously coated for a long period of time with good work efficiency and productivity.

[Brief description of drawings]

FIG. 1 is a plan view showing a schematic configuration of a processing line of an embodiment of an automatic head coating apparatus for small articles according to the present invention.

FIG. 2 is a schematic side view showing the periphery of a coating section conveying means of the embodiment shown in FIG.

FIG. 3 is a partial side view showing a relay section between a coating section conveying means and a drying section conveying means of another embodiment of the small article automatic head coating apparatus according to the present invention.

FIG. 4 is a partial cross-sectional view of a relay section between the coating section transporting means and the drying section transporting means of the embodiment shown in FIG. 3, viewed from the transport direction.

FIG. 5 is a schematic configuration diagram showing a conventional automatic head coating device for small articles.

[Explanation of symbols]

1 screw, 1a screw head, 1b screw screw part, 2 parts feeder, 3 chute, 4 chute groove part, 5 coating part conveying means, 6a, 6b
Endless belt, 7 grooves, 8a, 8b driven roller, 9a, 9b drive roller, 10a, 10b, 11
a, 11b, 12a, 12b, 13a, 13b guide roller, 14a, 14b wiping material, 15 coating device, 16 cleaning tank, 17 thinner (cleaning liquid),
18, 18 'Drying section conveying means, 19a, 19b Endless belt, 20 Grooves, 21 Baking drying furnace, 2
2a, 22b drive device, 24 discharge guide rail,
25 grooves, 26 carry-out containers, 30a, 30b
Drive device, 40a, 40b Guide body, 41a, 41
b endless chain, 42a, 42b fixing plate, 43a, 43b guide segment, 50 driven part, 53a, 53b sprocket

Claims (6)

[Claims] 1. An automatic coating device for a head (1a) of a small article (1) having a shaft section (1b), which receives a parts feeder (2) and a small article sent from the parts feeder and conveys the coating section. A chute (3) for sending to the means, a coating section conveying means (5) for sequentially transferring the small articles received from the chute, a coating device (15) arranged above the coating section conveying means, and a coating apparatus after the coating apparatus. Arranged drying device (2
1) and a head of a small article comprising a drying section transporting means (18, 18 ′) arranged so as to guide the small article transferred from the coating section transporting means to the discharging means (26) through the drying device. In the automatic part coating device, the coating part transporting means (5) and the drying part transporting means (18, 18 ') can accommodate the shaft portion (1b) of the small article at least in the transport path of the small article (1). A pair of guides (6a, 6b and 19a, 19b or 40a, 4) which are arranged in parallel at a predetermined interval so as to form (7, 20) and are synchronously moved.
0b) respectively, and the shank (1) of the small article (1).
b) is accommodated in the groove (7, 20) between the pair of guide bodies and is supported with the head exposed, and the small articles are conveyed as the guide bodies move. Automatic head coating equipment for small articles. 2. The guide bodies (6a, 6b and 19a, 1)
9. The automatic head coating device for small articles according to claim 1, wherein 9b) comprises a pair of endless belts. 3. A guide body (6) of the coating section conveying means (5).
a, 6b) is composed of a pair of endless belts which are arranged in parallel at least at a predetermined interval in the conveying path of the small article (1) and are synchronously moved, and near the coating section conveying means. Further equipped with a cleaning device (16),
The automatic head coating device for a small article according to claim 1 or 2, wherein the endless belt is passed through the cleaning device for cleaning. 4. The cleaning liquid removing means (14a, 14b) for removing the cleaning liquid adhering to the endless belt is disposed on the passage of the endless belt coming out of the cleaning device. Automatic head coating device for small articles described in. 5. A pair of endless chains (41a, 41b), which are arranged in parallel at a predetermined interval and are moved synchronously, and said drying section transfer means (18 ') are mutually connected to said chains. And a plurality of guide segments (43a, 43b) that are fixed so as to protrude radially adjacent to the guide segments (40a, 40b). 43a, 4
The head of the small article according to claim 1, 3 or 4, characterized in that it is arranged at a predetermined interval so as to form a groove (20) capable of accommodating the shaft portion of the small article. Department automatic coating equipment. 6. A roller on which a pair of endless belts (6a, 6b) of the coating section conveying means (5) is placed is arranged so as not to interfere with the drying section conveying means, One end of the pair of guide bodies (19a, 19b or 40a, 40b) of the drying section transporting means (18, 18 ') is arranged near the lower part of the pair of rollers (9a, 9b), and 6. Each of the guides of the coating section transporting means and the drying section transporting means is slightly inclined so that their heights become lower successively in the transport direction. Automatic head coating device for small articles described in.