JPH0621575Y2 - Conveyor belt for coating equipment for cylindrical electronic parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an improvement of a conveyor belt for conveying a cylindrical electronic component in a coating device for the cylindrical electronic component.

[Conventional technology]

Generally, in cylindrical electronic parts such as leadless resistors and capacitors, insulating paint or
A coating material is applied to display the quality or grade of the electronic component.

As shown in FIG. 4, when the outer peripheral surface of the cylindrical electronic component is coated with the insulating paint, the outer peripheral surface of the upper portion of the coating roller 10 rotating in the direction of the arrow E with the paint adhered to the outer peripheral surface. By supplying the electronic component A in the direction of the arrow F between the press roller 11 and the pressing roller 11 arranged above the
A coating device is used in which the coating material is transferred from the coating roller 10 to the outer peripheral surface of the electronic component A. In this coating device, the electronic component A is supplied between the coating roller 10 and the pressing roller 11. In doing so, the electronic component A
A conveyor belt 12 is used which is provided with engaging holes 13 into which are fitted at appropriate intervals P ′ in the longitudinal direction.
The electronic parts A are fed into the engagement holes 13 in a state where the electronic parts A are fitted in the engaging holes 13 to supply the electronic parts A between the coating roller 10 and the pressing roller 11.

In this case, the electronic component A fitted in the engagement hole 13 of the transport belt 12 rotates together with the coating roller 10 and the pressing roller 11 when coming into contact with the outer peripheral surface of the rotating coating roller 10. The paint will adhere to both side edges of the engaging hole 13 of the conveyor belt 12.

Therefore, a conventional conveyor belt is disclosed in, for example, JP-A-62-2.
As described in Japanese Patent No. 89261 and shown in FIG. 5, each engagement hole 13 in the conveyor belt 12 is appropriately lengthened in the left and right side edges of the engagement hole 13 in the conveyance direction of the conveyor belt 12. An expansion groove 13a extending by (L1),
Appropriate length (L2) in the direction opposite to the transport direction of the transport belt 12
A cross-shaped hole is formed by providing an extension groove 13b that extends only for the purpose of preventing the paint from adhering to the left and right edges of the engagement hole 13.

Then, in this case, the prior art one has one expansion groove 1
The length (L1) in 3a and the length (L2) in the other expansion groove 13b are configured to have the same size.

[Problems to be solved by the device]

However, as described above, each engagement hole 1 in the conveyor belt 12 is
3 is formed into a cross-shaped hole, the length (L1) in one of the expansion grooves 13a and the other expansion groove 13b
When the length (L2) of the conveying belt 12 is set to be the same as the length (L2) of the conveying belt 12, the distance P ′ between the engaging holes 12 becomes large, and the number of the engaging holes 13 per unit length of the conveying belt 12, that is, the conveying belt 12 is large. Electronic parts A that can be transported per unit length of
There is a problem in that the work efficiency of the coating is lowered because the number of the paint is reduced.

In this case, in order to improve the work efficiency of the coating, it is considered that the transport speed of the transport belt 12 should be increased. However, in the coating process, a drying process for drying the applied coating after that is continuously performed. This drying is performed by transporting the coated electronic component A in the drying furnace by the transport belt. Increasing the transport speed of the transport belt 12 shortens the drying time. Therefore, when the transport speed of the transport belt 12 is increased, the drying furnace must be lengthened along the transport direction of the transport belt, and the entire equipment including the drying furnace becomes large.

Therefore, in order to prevent the number of engaging holes 13 per unit length of the transport belt 12 from being small when each of the engaging holes 13 of the transport belt 12 is formed in a cross shape, as a prior art. Japanese Laid-Open Patent Application No. 63-20061 discloses that the portion between the engaging holes of the conveyor belt is curved and deformed upward.
Japanese Patent Laid-Open No. 62 proposes that a plurality of cross-shaped engaging holes are communicated with each other.

However, as in the former case, when the portion between the engagement holes of the conveyor belt is curved and deformed upward, the conveyor belt must be processed to bend the portion between the engagement holes. Not only that, the price of the conveyor belt increases significantly, and the conveyor belt is twisted and deformed.
Further, as in the latter case, connecting a plurality of cross-shaped engaging holes to each other causes a problem that the strength of the conveyor belt is reduced, and thus the durability of the conveyor belt is reduced.

According to the present invention, when the engaging holes of the conveyor belt are formed in a cross shape, the number of engaging holes per unit length of the conveyor belt is reduced, which increases the cost of the conveyor belt and twists and deforms the conveyor belt. It is an object of the present invention to surely prevent the occurrence of the deterioration of the durability of the conveyor belt or the deterioration of the durability of the conveyor belt.

[Means for Solving the Problems]

In order to achieve this object, the present invention is provided with a large number of engaging holes into which a cylindrical electronic component supplied between the coating roller and the pressing member is fitted one by one at an appropriate interval along the longitudinal direction, and
In each of the engaging holes, in a thin belt made of a belt formed by forming an extension groove on each of the left and right side edges of the engaging hole to form a cross-shaped hole, among the extension grooves on both side edges of the engaging hole, The length dimension of one extension groove extending in the transport direction of the transport belt is short, and the length dimension of the other extension groove extending in the direction opposite to the transport direction of the transport belt is long.

[Function of device]

In a coating device for a cylindrical electronic component, the cylindrical electronic component is supplied between the outer peripheral surface of the coating roller and the pressing member while being fitted into the engagement hole of the conveyor belt, and the coating roller and the pressing member form a circular shape. By rotating the columnar electronic component together, the paint on the outer peripheral surface of the coating roller is applied by transfer to the outer peripheral surface of the electronic component. In this case, the paint on the outer peripheral surface of the coating roller is the coating roller. When it is transferred from the outer peripheral surface of the electronic component to the outer peripheral surface of the electronic component, it is blocked by the electronic component and rises up. A large amount is generated at the side edge portion on the front side of the conveying belt in the conveying direction.

Therefore, in the case where each engaging hole in the conveyor belt for supplying the electronic component between the coating roller and the pressing member is formed into a cross-shaped hole by forming an expansion groove on each of the left and right side edges thereof, Of the expansion grooves on both sides of the engaging hole,
By increasing the length dimension of the other expansion groove extending in the direction opposite to the conveying direction of the conveyor belt, it is possible to reliably prevent the paint that has risen due to the damming of electronic components from adhering to the conveyor belt as described above. In addition, in order to prevent the paint from adhering to the conveyor belt in a portion in front of the electronic components in the conveying direction of the conveyor belt, one of the left and right edges of each engagement hole has an expansion groove, A short length dimension sufficient to prevent contact between the outer peripheral surface of the electronic component and the side surface of the engagement hole is sufficient.

That is, by shortening the length of one of the two expansion grooves in each engaging hole of the conveyor belt and increasing the length of the other expansion groove, it is possible to prevent the paint from adhering to the conveyor belt. The distance between the engaging holes can be reduced by shortening the length of one of the expanding grooves in each engaging hole.

[Effect of device]

Therefore, according to the present invention, the distance between the engagement holes can be shortened under the condition that the paint is not attached to the conveyor belt, and the number of the engagement holes per unit length of the conveyor belt, that is, the conveyor belt Since the number of electronic components that can be transported per unit length of the belt increases, the transport speed of the transport belt increases, and the work efficiency of coating on cylindrical electronic components can be improved without increasing the length of the drying oven. Of.

Moreover, according to the present invention, it is only necessary to increase the length of one of the two expansion grooves in each of the engagement holes of the conveyor belt. Since it is not necessary to bend upward, or to connect a plurality of engaging holes to each other, the cost of the conveyor belt is increased and the conveyor belt is twisted and deformed, or the durability of the conveyor belt is increased. It is possible to increase the number of engaging holes per unit length of the conveyor belt without causing a decrease in

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings (FIGS. 1 to 3). In FIG. 1, reference numeral 1 denotes a presser for holding a thin conveyor belt 3 arranged along the upper surface of a rail 2. 1 shows a coating device in which a pressing roller 4 and a coating roller 5 as an example of a member are vertically arranged.

A paint supply roller 7 partly immersed in the paint tank 6 is in contact with the outer peripheral surface of the coating roller 5, and the upper portion of the coating roller 5 is upwardly moved through a hole 2a formed in the rail 2. An elastic body such as rubber is stretched over the pressing roller 4.

In addition, the cylindrical electronic component A has a large diameter at both ends,
The pressing roller 4 is brought into contact with both ends thereof, and the middle portion of the small diameter is coated.

The thin transport belt 3 is provided with an engagement hole 8 along the longitudinal direction of the transport belt 3 which is oriented in a direction orthogonal to the longitudinal direction of the transport belt 3 and into which the cylindrical electronic component A is fitted. And the engaging holes 8 are formed at appropriate intervals P.
Are extended in both left and right directions along the longitudinal direction of the conveyor belt 3 to form a cross shape in plan view. At this time, the length dimensions of the extension grooves 9a, 9b formed on both left and right sides of the engagement hole 8 are determined. An extension portion 9a formed by extending l1 and l2 in the conveyance direction of the conveyance belt 3 (direction C) has a small length dimension l1 and an extension portion 9b formed in a direction opposite to the conveyance direction of the conveyance belt 3 is expanded. The size l2 is set to be large.

In the above configuration, the electronic component A is fitted into the engagement hole 8 of the transfer belt 3, rolled on the rail 2 and conveyed to the arrow C, while the electronic component A is pinched by the pressing roller 4. When the coating roller 5 is rotationally driven in the direction of arrow D, the electronic component A and the paint supply roller 7 are rotated together, and the paint B in the paint tank 6 is sequentially transferred from the paint supply roller 7 to the electronic component A via the paint roller 5. Then, in the small diameter part of the electronic component A,
The coating material B is applied with the same width as the coating roller 5.

At this time, when the paint B is transferred from the coating roller 5 to the electronic component A, the electronic component A and the coating roller 5 are in close contact with each other. Therefore, the paint B attached to the coating roller 5 is blocked by the electronic component B. Since it is in a raised state, the paint B easily adheres to the conveyor belt 3 in a wide range on the front side in the conveyor direction of the conveyor belt 3, while the paint B is more forward than the electronic component A in the conveyor direction of the conveyor belt 3. Then, the paint hardly adheres to the conveyor belt 3.

Therefore, in order to prevent the paint B from adhering to the conveyor belt 3 by forming the engagement hole 8 in a cross shape in a plan view, among the expansion grooves 9a and 9b in each engagement hole 8, the conveying direction of the conveyor belt 3 is determined. By lengthening the length dimension l2 of the other expansion groove 9b extending in the opposite direction, it is possible to reliably prevent the paint B that has risen due to the blocking of the electronic component A from adhering to the conveyor belt 5. , The length dimension l1 of the expansion groove 9a extending forward in the transport direction of the transport belt 3.
Must be short enough to prevent contact between the outer peripheral surface of the electronic component A and the side edge of the engagement hole 8.

Thus, the length dimension l1 of one of the expansion grooves 9a, 9b in each of the engagement holes 8 of the conveyor belt 3 is 1l.
Can be reduced without causing the coating material B to adhere to the conveyor belt 3, so that the interval P between the engagement holes 8 can be reduced.
Difference in length between the two expansion grooves 9a and 9b in
It can be reduced by the amount of -l1).

Therefore, the number of engaging holes 8 per unit length of the conveyor belt 3, that is, the number of electronic components A that can be conveyed per unit length of the conveyor belt 3 is increased to increase the conveyor speed of the conveyor belt 3. As a result, the work efficiency of coating on the cylindrical electronic component A can be improved without increasing the length of the drying furnace.

[Brief description of drawings]

FIG. 1 is a view showing an essential part of the present invention, which is a plan view of II of FIG. 2, FIG. 2 is a partially cutaway front view of a coating apparatus, and FIG.
FIG. 4 is a front view of a conventional example, and FIG. 5 is a plan view of a conventional conveyor belt. A: electronic parts, B: paint, 1 ... coating device, 3 ...
Conveyor belt, 4 ... Pressing roller as an example of pressing member, 5 ... Painting roller, 8 ... Engaging hole, 9a, 9b.
Expansion groove.

Claims (1)

[Scope of utility model registration request] 1. A plurality of engagement holes into which cylindrical electronic components to be supplied between the coating roller and the pressing member are fitted one by one at appropriate intervals along the longitudinal direction, and each of the engagement holes is provided. In a thin-plate conveying belt formed by forming expansion grooves at both left and right side edge portions thereof to form a cross-shaped hole, among the expansion grooves at both side edge portions of the engaging holes, extending in the conveying direction of the conveying belt. A conveyor belt in a coating device for a cylindrical electronic component, wherein one extension groove has a short length dimension and the other extension groove extending in a direction opposite to a conveying direction of the conveyor belt has a long length dimension.