JPH0137976B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coating device for coating elongated objects, particularly helically twisted elongated objects.

Traditionally, long objects have been coated using methods such as using dies, rolls, brushes, belts, and inserting the material into a nozzle that has approximately the same external shape as the object to be coated. Ta. However, these methods have problems such as difficulty in obtaining a uniform film thickness when the coating has irregularities.

There is also known a method of dip coating a long object using a fixed tank filled with a coating liquid. However, with this method, it is extremely difficult to coat objects that are extremely long or heavy and difficult to transport.

For this reason, the painting of heavy, long objects has been done manually by brushing, for example, by a person sitting on a chair suspended from a rope, or by a person riding in a gondola.
However, these coating methods have drawbacks such as safety in working at high places, scattering of the coating liquid which is unfavorable in terms of environmental hygiene, and low work efficiency due to manual work.

The present invention is disclosed in Japanese Unexamined Patent Publication No. 166963/1983,
No. 139945 (Japanese Unexamined Patent Publication No. 57-65352), etc., proposed a coating device particularly suitable for coating long objects fixedly installed in the vertical direction, such as hanger ropes for suspension bridges.

A hanger rope 1 for a suspension bridge, which is an example of a coated object, will be briefly described with reference to FIGS. 1 and 2. That is, in FIGS. 1 and 2, a hanger rope 1 for a suspension bridge, which is an example of an object to be coated, is shown in a sectional view and a side view, respectively. As shown in the figure, the hanger rope 1 is formed by twisting a plurality of steel wires into a spiral shape. For this reason, spiral irregularities are formed on the outer periphery of the hanger rope 1.

As an apparatus for painting such a hanger rope, for example, the above-mentioned Japanese Patent Application Laid-Open No. 166963/1987 discloses a paint tank having an opening at the bottom through which the object to be coated passes, and a device that extends the paint tank downwardly relative to the object to be coated. A coating apparatus is disclosed that includes a drive means for moving the paint tank, and a support means connected to the drive means and supporting the paint tank. Although this coating device has excellent effects such as being able to efficiently coat the hanger rope 1 as described above, it also has the following points to be improved.

In the above-mentioned coating equipment, when the coating speed increases, excess paint collects on a part of the surface of the object to be coated after it has been applied, and the film thickness in that part becomes thicker than in other parts. There is a problem with this. Alternatively, if the object to be coated, such as a hanger rope, is placed diagonally at a large angle with respect to the vertical direction, the paint tends to collect on a part of the object, resulting in uneven film thickness. There is also the problem.

The present invention was made in consideration of the above-mentioned situation, and according to the present invention, the upper part is open,
A long rope comprising a paint tank having an opening at the bottom through which a rope-like long object to be coated having an outer surface formed with spiral irregularities is passed, and a driving means for moving the paint tank downward. A coating device for coating a long object to be coated, comprising a brush disposed above the paint tank so as to be rotatable around a central axis in the longitudinal direction of the object to be coated and in contact with the object to be coated; Provided is a coating device characterized in that the bristles of the brush are installed along a direction inclined with respect to a longitudinal central axis so that the bristles of the brush match the spiral shape of the outer periphery of the object to be coated. .

Another object of the present invention is to provide a device that is difficult to move because it is heavy or fixedly installed;
It is an object of the present invention to provide a coating device particularly suitable for coating objects having a complicated shape such as hanger ropes for suspension bridges.

Another object of the invention is to provide a coating device with a device for uniformizing the film thickness of paint on a painted surface.

The above objects and other objects will become clear from the following description of a preferred embodiment of the coating apparatus of the present invention, with reference to the accompanying drawings.

A specific example of the coating apparatus according to the present invention will be described with reference to FIGS. 3 and 4.

In this embodiment, the invention is formed from two painting sections 12 , a support section 14 , a paint supply section 16 , a drive section 18 and a brush section 150 .

The coating section 12 is provided on each of the two hanger ropes 1 to be coated. The number of coated parts 12 can be arbitrarily changed depending on the number of objects to be coated, such as the hanger rope 1. Since these coating parts 12 have the same structure, one of them will be explained. Painting section 12
has a paint tank 3, and an opening is formed at the bottom of the paint tank 3. A hanger rope 1 is adapted to extend through this opening. A holder 20 is formed under the bottom of the paint tank 3 so as to surround the opening. The seal member 8 is rotatably held by this holder 20. A hole having a shape substantially equal to the cross section of the hanger rope 1 is provided inside the sealing member 8. The outer periphery of the sealing member 8 is formed into a circular shape, so that the sealing member 8 as a whole has a disk shape with a hole at its center. The holder 20 is comprised of a side wall and a bottom wall forming a cylinder with a radius and height approximately equal to the radius and height of the sealing member 8. for example,
With the configuration described above, the seal member 8 is rotatably supported by the holder 20. Holder 2
A roller 22 is installed on a wall 21 extending downward from 0, and this roller 22, as shown in the figure,
It comes into contact with the hanger rope 1, maintains the appropriate arrangement direction of the coated part 12, and functions to allow the coated part 12 to move more smoothly in the axial direction of the hanger rope 1. Therefore, the rotation axis of the roller 22 is in the horizontal plane, and the number thereof may be two as shown in the figure or three or more.

Although not shown, the paint tank 3, seal member 8, etc. of the painting section 12 are constructed so that they can each be divided into two parts, and thereby, without removing the already installed hanger rope 1, Preferably, the hanger rope 1 can be inserted into the central hole of the paint tank 3 and the sealing member 8.

The support part 14 includes a support stand 24 and four support rods 26,
28 and eight support wires 30 and 32. Support rods 26 and 2 are installed at the upper and lower parts of the support stand 24.
8 are connected to each other, and support wires 30 and 32 are connected to the tips of the support rods 26 and 28, respectively. A supply tank 2 is installed on the upper part of the support stand 24, and a driving rope 7 is connected to the upper part of the supply tank 2 and the lower part of the support stand 24. As described above, one end of the support wires 30, 32 is connected to the tips of the support rods 26, 28, and the other ends are connected to the upper portion of the brush portion 152 and the lower portion of the wall 21, respectively.

The paint supply unit 16 includes a supply tank 2 and a supply pipe 34. When the supply tank 2 is supplying paint, it does not communicate with the atmosphere from any path other than through the supply pipe 34, so the supply tank 2 holds a sufficient amount of paint and the supply pipe 34 is not in communication with the atmosphere. The paint is gradually supplied to the paint tank 3 through the paint tank 3.

The drive unit 18 includes a drive rope 7 and a hoist (not shown). Compared to the resistance force between the sealing member 8 and the hanger rope 1, the coated part 1
2 has a sufficiently large weight, the painted part 12
is suspended by support rods 26 and support wires 30. Rewind the hoist and remove the drive rope 7.
When the paint section 12 is lowered, the coating section 12 is lowered. On the other hand, if the resistance force between the sealing member 8 and the hanger rope 1 is relatively large, the weight of the support base 24 may be increased to apply a downward force by the support wire 32, or the lower drive rope may be 7. Using the support rod 28 and the support wire 32, apply a downward force to the coating section 12, thereby causing it to descend.

The brush section 150 includes a support frame 152, a brush support 154, and a brush 156. Support frame 15
2 is connected to the paint tank 3 and extends upward from the paint tank 2, and has a substantially cylindrical shape, and the paint collected by the brush 156 is supplied to the paint tank 3. For example, four pairs of rollers 158 are rotatably installed inside the substantially cylindrical wall of the support frame 152. The brush support 154 is comprised of a generally cylindrical wall and a flange attached to the lower end of the generally cylindrical wall. A flange is disposed between each pair of rollers 158. Therefore, the movement of the brush support 154 in the axial direction with respect to the support frame 152 is restricted, and smooth rotation around the axis is possible. A brush 156 is attached to the inside of the brush support 154. It is preferable that the support body 152, the brush support body 154, and the brush 156 are constructed so that they can each be divided into one part, similarly to the coating section 12 and the like.

Furthermore, according to the invention, the bristles of the brush 156 are arranged along the helical shape of the hanger rope 1, rather than in the vertical direction, as shown for example in FIG.

Thereby, according to the invention, when the entire device is lowered, the brush 156 and the hanger rope 1
brush 156 and brush support 154 rotate. Thereby, excess paint in the recesses of the spiral irregularities of the hanger rope 1 can be effectively removed.

Next, the operation of the coating apparatus according to this specific example will be explained.

First, the sealing member 8 is arranged to surround the hanger rope 1, for example, via the dividing surface. Next, the paint tank 3 is divided into two parts, for example, at a dividing plane through its central axis, and the sealing member 8 is supported by the holder 20 and the paint tank 3 is arranged so as to surround the hanger rope 1. do. Of course, the coating section 12 includes a support stand 24, support rods 26, 2
8 and support wires 30 and 32, and the drive rope 7 is connected to the supply tank 2 and the support stand 24.
Next, a pot (not shown) provided on the supply pipe is opened, and the paint stored in the supply tank 2 is poured into the paint tank 3 via the supply pipe 34. The hoist is then operated to sequentially unwind the driving rope 7 and, if necessary, to lower the paint tank 3 by applying a downward force to the paint tank 3.

The inner surface of the hole in the seal member 8 has a shape that matches the outer shape of the hanger rope 1, and since the seal member 8 is rotatably held in the holder 20, when the coated part 12 is lowered, the seal member 8 moves along the helical shape of the hanger rope 1, so that the sealing member 8 moves along the helical shape of the hanger rope 1.
It will rotate around the central axis of. As mentioned above, the inner surface of the sealing member 8 is attached to the hanger rope 1
, the amount of paint leaking between the sealing member 8 and the hanger rope 1 is small.

According to the invention, the bristles of the brush 156 are placed along the helical shape of the hanger rope 1.
Then, when the tips of the bristles of the brush 156 enter the recesses of the spiral unevenness of the hanger rope 1 and the main coating device is lowered, the brush 156
And the brush support 154 will rotate along the spiral shape of the hanger rope 1. and,
Effectively removes excess paint from concave areas of spiral irregularities,
This can be collected into the paint tank 3.

Furthermore, it is clear that if, in addition to the brush section 150 shown in FIG. 3, a similar brush section is placed below the paint tank 3, even better coating can be obtained. That is, the hanger rope 1 is connected by the lower brush part.
can be cleaned and then painted as described above.

It is clear that the shape, material, angle of the brush 156 with respect to the central axis of the object to be coated, etc. can be varied in various ways, taking into account the shape of the object to be coated, the characteristics of the paint, and the like.

In the above description, the paint tank 3 does not rotate and only the sealing member 8 rotates, but a coating device in which the paint tank 3 rotates as disclosed in JP-A-56-16696 is described. It is clear that the present invention can also be applied to other types of painting equipment.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a hanger rope, which is an example of an object to be coated. Figure 2 is a side view of the hanger rope;
FIG. 3 is a longitudinal sectional view of a first specific example of the coating apparatus according to the present invention. FIG. 4 is a partially cutaway cross-sectional view of the brush portion of the first specific example of the coating device according to the present invention. 1...hanger rope, 2...supply tank, 3...
Paint tank, 7... Drive rope, 8... Seal member,
12... Painting section, 14... Supporting section, 16... Paint supply section, 18... Drive section, 20... Holder, 15
0... Brush portion, 152... Support frame, 154...
Brush support, 156...Brush.

Claims (1)

[Scope of Claims] 1. A paint tank which is open at the top and has an opening at the bottom through which a rope-like long object to be coated has an outer surface formed with spiral irregularities; In a coating device for painting a long object to be coated, which is equipped with a driving means for moving downward, the device is rotatable around a central axis in the longitudinal direction of the object to be coated and is adapted to be in contact with the object to be coated. A brush is provided above the paint tank, and the bristles of the brush are installed along a direction inclined with respect to the central axis in the longitudinal direction so that the bristles of the brush match the spiral shape of the outer periphery of the object to be coated. A coating device characterized by: