JPS6336645Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a coating apparatus for cylindrical electronic components such as resistors, diodes, and capacitors.

Recently, so-called leadless cylindrical resistors and capacitors have been used. For example, in the case of a resistor, a coating film is formed on a resistor element having caps fitted on both sides of an insulator during the manufacturing process. There is a trend toward miniaturization of such leadless resistors. Conventionally, in order to form a coating film on such a resistor, resistor elements with caps fitted on both sides of the insulator are sequentially inserted into the insertion holes of a moving conveyor plate, and the supports on the lower side of the resistor elements are inserted into the insertion holes on both sides of the insulator. Support the cap. The resistive element supported in the insertion hole rotates its cap during the travel of the conveyor plate by a rotating roller installed on the top of the conveyor plate, and the coating wheel installed on the underside of the conveyor plate removes the paint in the paint tank. is applied to the resistive element. In this way, in order to apply paint to a resistor element using a single coating wheel, the resistor element must be rotated several times, and the conveyance speed is itself limited, causing a decrease in work efficiency.
Also, when applying paint with a paint wheel, especially if the resistor is extremely small, the width of the cap is narrow, so the paint adheres to the rotating roller, and the rotating roller pushes the paint toward the outer edge of the cap. Not only do they spread and adhere to each other, causing stains, but they also have the disadvantage that good soldering conditions may not be obtained.

The purpose of this invention is to reduce the number of rotations of cylindrical electronic components so that painting can be performed reliably.
Therefore, it is possible to increase the conveyance speed and improve work efficiency, and it is also possible to prevent paint from adhering to the outer end of the cylindrical electronic component and staining it, and also to prevent poor soldering. The present invention aims to provide a coating apparatus for cylindrical electronic parts.

In order to achieve the above object, the present invention includes a conveying device for conveying a cylindrical electronic component, and a conveying device that is provided so as to be rotatable in the same direction above and below in the middle of the conveying device and to be able to come into contact with the cylindrical electronic component. The present invention is characterized in that it includes a painting wheel that applies paint attached to the outer periphery of the cylindrical electronic component, and a drive device that rotates these painting wheels.

Hereinafter, an example in which the coating apparatus of the present invention is applied to coating a leadless resistor will be described in detail with reference to the drawings. As shown in FIGS. 1 to 3, the conveyor plate 1 is made of a flexible strip made of thin stainless steel, spring steel, etc., and has an endless shape that can run in reverse _. Insertion holes ₂ for inserting resistance elements R into which caps r2 are fitted are arranged in rows at equal intervals in the longitudinal direction. Each insertion hole 2 is formed narrowly at both sides located in the width direction of the conveyor plate 1 so that the outer end of the cap r ₂ of the resistance element R can be inserted with a slight margin, and the middle part is formed wide. This makes it possible to prevent adhesion and staining of paint, which will be described later. The width of each insertion hole 2 is formed to be approximately equal to the length of the resistance element R, and movement of the resistance element R in the axial direction within the insertion hole 2 is restricted. Each insertion hole 2 has support portions 3 protruding from both sides of the bottom thereof to support both sides of the resistance element R, that is, the outer end of the cap _r2 . This conveyance plate 1 is hung on a pulley (not shown) of a reversing drive device provided on a pedestal (not shown), and can be moved in the direction of the arrow in FIGS. 1 and 2 by driving a motor (not shown). can. This conveyance plate 1 is prevented from lateral wobbling and drooping by guide rollers (not shown) supported by a pedestal. Resistance elements R are sequentially inserted into each insertion hole 2 of the conveyance plate 1 by a supply device (not shown).

A horizontal support shaft 5 is fixed with screws 6 to a support plate 4 vertically attached to the frame. The base of an upper painting arm 7 is fitted to the outer end of the support shaft 5 so as to be vertically rotatable, and the upper painting arm 7 is held between collars 8 and 9 mounted on the support shaft 5, and Movement in this direction is restricted. Horizontal rotating shafts 10 and 11 are rotatably supported in the middle part of the upper painting arm 7 via bearings 12 and 13 in order from the base side to the tip side, and on each rotating shaft 10 and 11 is an upper painting arm. 7
Collars 14, 15 and 16, 17 are attached to sandwich the rotating shafts 10, 11, thereby restricting lateral movement of the rotating shafts 10, 11. A transfer wheel 18 is fitted onto the outer end of the rotating shaft 10 , a nut 19 is screwed into a threaded portion formed at the outer end of the rotating shaft 10 , and the transfer wheel 18 is fitted onto the outer end of the rotating shaft 10 . It is pressed against a fixed collar 20 and fixed so that it can rotate together with the rotating shaft 10. An upper painting wheel 21 is fitted onto the outer end of the rotating shaft 11, and a nut 22 is screwed into a threaded portion formed at the outer end of the rotating shaft 11.
The upper coating wheel 21 is pressed against a collar 23 fixed on the rotating shaft 11 and is fixed so as to be able to rotate together with the rotating shaft 11. This upper coating wheel 21 is in contact with the transfer wheel 18 . A stay 24 is fixed to the support plate 4, and a tension screw 25 is screwed into the stay 24 and fixed with a nut 26. A tension spring 27 is tensioned between the inner end of the tension screw 25 and the tip of the upper painting arm 7, and the elasticity of the tension spring 27 causes the upper painting arm 7 and the upper painting wheel 21 to
etc. are pushed upwards. A position-adjustable stopper 30 consisting of a bolt 28 and a nut 29 is attached to the stay 24.
The upper surface of the tip side of the upper painting arm 7 is brought into contact with the upper painting wheel 21, and the position of the upper painting wheel 21 is regulated.
The insulator _r1 of the resistance element R, which is conveyed by the movement of the conveyor plate 1, comes into contact with the upper coating wheel 21. A pedestal 31 is fixed to the support plate 4, and a paint tank 32 is placed within this pedestal 31. The lower part of the transfer wheel 18 is immersed in the paint 33 in the paint tank 32. A shaft 34 is provided laterally projecting from the base side of the upper painting arm 7, and the base of a scraping plate 35 is fixed to this shaft 34.
The bifurcated portion 36 on the tip side of the scraping plate 35 is arranged so as to fit into the outer circumferential portion of the transfer wheel 18, and the paint 3 that is excessively attached to the transfer wheel 18 is removed.
3 can be scraped off. The paint 33 adhering to the transfer wheel 18 is applied to the outer periphery of the upper coating wheel 21.

A support shaft 38 is similarly fixed to the support plate 4 below the support shaft 5 with screws 39. The base of a lower painting arm 40 is fitted to the outer end of the support shaft 38 so as to be rotatable in the vertical direction.
1 and 42, and movement in the lateral direction is restricted. A horizontal rotating shaft 43 is rotatably supported by the lower painting arm 40 below the rotating shaft 11 via a bearing 44, and collars 45 and 46 are mounted on the rotating shaft 43 so as to sandwich the lower painting arm 40. The rotary shaft 43 is attached to the rotary shaft 43 and its lateral movement is restricted. A lower painting wheel 47 is fitted onto the outer end of the rotating shaft 43 , a nut 48 is screwed into a threaded portion formed at the outer end of the rotating shaft 43 , and the lower painting wheel 47 is fitted onto the outer end of the rotating shaft 43 . It is pressed against a collar 49 fixed above and fixed so that it can rotate together with the rotating shaft 43. A stay 50 is fixed to the support plate 4, and a tension screw 51 is screwed into the stay 50 and fixed with a nut 52. A tension spring 53 is tensioned between the inner end of this tension screw 51 and the tip of the lower painting arm 40, and the elasticity of this tension spring 53 urges the lower painting arm 40, the lower painting wheel 47, etc. upward. ing. The stay 50 has a stopper 56 whose position can be adjusted by a bolt 54 and a nut 55.
is attached to the stopper 56, and the upper surface of the lower end painting arm 40 is brought into contact with the stopper 56, thereby restricting the upper limit of the lower painting wheel 47. The insulator _r1 of the resistance element R conveyed by the travel of the conveyor plate 1 comes into contact with the lower coating wheel 47. A pair of support shafts 57 are fixed to the support plate 4 , and a support member 58 is fitted onto these support shafts 57 such that the position thereof can be adjusted, and is fixed with screws 59 . A support shaft 60 is inserted vertically through the center of the support member 58,
It is fixed with screws 61 so that its position can be adjusted.
A pedestal 62 is fixed to the upper end of this support shaft 60,
A paint tank 63 is placed within this pedestal 62. The lower part of the lower coating wheel 47 is immersed in the paint 33 in the paint tank 63.
A shaft 64 is provided laterally protruding from the tip side of the lower painting arm 40, and the base of a scraping plate 65 is fixed to this shaft 64. The bifurcated portion 66 on the tip side of this scraping plate 65 is arranged so as to fit into the outer circumference of the lower coating wheel 47.
The excess paint 33 attached to the surface can be scraped off.

Sprockets 67, 68 and 69, 70 are provided with bearings 71 at the inner ends of the support shafts 5 and 38, respectively.
and 72 are rotatably fitted, and the rotating shaft 1
Sprockets 73, 74 and 75 are fixed to the inner ends of wheels 0, 11 and 43, respectively. Support plate 4
A motor 76 is attached to the motor 76, and a sprocket 78 is attached to an output shaft 77 of the motor 76. A chain 79 is attached to this sprocket 78 and the sprockets 69, 67, and chains 80 and 81 are attached to the sprockets 68, 73, and 74, and 70 and 75, respectively. The motor 76 is driven to rotate the sprockets 69 and 68 via the chain 79. Sprocket 6
8 rotates the chain 80 and sprocket 73,
74, the transfer wheel 18 and the upper coating wheel 21 can be rotated clockwise and counterclockwise, respectively. Rotation of the sprocket 69 allows the lower painting wheel 47 to be rotated counterclockwise through the chain 81 and the sprocket 75, that is, in the same direction as the upper painting wheel 21.

Next, the operation of the present invention will be explained. Resistance elements R are sequentially supplied from the supply device to the insertion holes 2 of the traveling conveyor plate 1, and each resistance element R is connected to its cap.
The outer end of r ₂ is supported on the support 3 . Insertion hole 2
As the conveying plate 1 travels, the resistive element R supplied to the conveyor plate 1 is rotated in contact with the upper and lower coating wheels 21 and 47, which are rotating in the same direction as described above. During this time, the paint 33 adhering to the upper and lower painting wheels 21 and 47 as described above is applied to the outer periphery of the resistive element R to form a coating film. The resistive element R after the coating film is formed is discharged out of the apparatus by the movement of the conveyor plate 1.

Incidentally, the present invention can also be applied to coating a cylindrical electronic component having lead wires on both sides.

As is clear from the above description, according to the present invention, coating wheels are provided so as to be rotatable in the same direction at the top and bottom of the cylindrical electronic component while the cylindrical electronic component is being transported by the transport device, and these upper and lower painting wheels are The parts are brought into contact and rotated, and the paint attached to the upper and lower painting wheels is applied to the cylindrical electronic parts. Since the coating is performed using the two upper and lower coating wheels in this manner, it is possible to reduce the number of rotations of the cylindrical electronic component and ensure reliable coating, thereby increasing the conveyance speed and improving work efficiency. In addition, there is no risk of paint adhering to the outer end of the cylindrical electronic component, and there are advantages such as being able to prevent staining and poor soldering.

[Brief explanation of drawings]

1 to 3 show an embodiment of the coating apparatus of the present invention, in which FIG. 1 is a plan view, FIG. 2 is a front view, and FIG. 3 is a partially cutaway side view. 1...Transportation plate, 7...Upper coating arm, 18...
... Transfer wheel, 21 ... Upper painting wheel, 30 ... Stopper, 32 ... Paint tank,
35...Scraping board, 40...Lower painting arm, 4
7... Lower painting wheel, 56... Stopper, 63... Paint tank, 65... Scraping plate, 7
6...Motor.

Claims (1)

[Scope of utility model registration request] A conveying device that conveys cylindrical electronic components, and a conveying device that is provided so that it can rotate in the same direction above and below in the middle of this conveying device and can come into contact with the cylindrical electronic components. A coating device for cylindrical electronic components, characterized by comprising a coating wheel for coating electronic components, and a drive device for rotating these coating wheels.