JPH0623573Y2 - Paint intrusion prevention tool for electrodeposition coating, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a pipe internal paint intrusion prevention device used for coating the outer surface of a bottomed pipe by electrodeposition coating or immersion coating.

(Prior Art) Conventionally, as a paint invasion preventive device of this type, with a bottom of a bottomed pipe facing downward, a disc-shaped head having a diameter larger than the diameter of the open upper end of the pipe immersed in the paint. It is known that the disk-shaped head is provided with a cylindrical flange formed by being bent downward on the outer circumference of the head, and an air reservoir is formed between the cylindrical flange and the outer circumference of the pipe ( For example, the actual exploitation 56-
108136).

(Problems to be solved by the invention) In the conventional technology, the paint may enter the pipe depending on the outside air temperature, the paint temperature, the work temperature, and the work position in the paint. There are problems that the masking seal part needs to be modified, and that the device for the preventive tool and the attachment and detachment are troublesome.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to completely prevent the paint from entering the inside of the pipe and to eliminate the need to modify the masking portion. An object of the present invention is to provide a paint intrusion prevention device for the inside of a pipe with a bottomed pipe in electrodeposition coating, etc., which can be easily attached and detached.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a pipe receiving member that is inserted into an opening of the bottomed pipe that is immersed in the coating, with the bottom of the bottomed pipe facing upward. The pipe receiving member is provided with a masking member around which the opening of the bottomed pipe is wound, and the pipe receiving member has a pipe shape in which an upper portion and a lower portion are open and has a length equal to or more than a certain length. The pipe receiving member has a predetermined length so that the vertical movement of the coating liquid surface due to the volume change of the air reservoir formed inside and inside the pipe receiving member is performed within the range of the inner peripheral surface of the pipe receiving member. Only, it is inserted into the opening of the bottomed pipe. Further, it is preferable to form a lip portion at the contact portion of the masking member with the pipe, or to mount an O-ring on the outer peripheral end portion of the masking member.

(Operation) By inserting a pipe receiving member having a pipe shape whose upper and lower sides are open and having a certain length or more into the opening of the bottomed pipe by a predetermined length, the inside of the bottomed pipe and the pipe receiving member Since the vertical movement of the coating liquid surface due to the volume change due to the temperature difference of the air pool formed inside is performed within the range of the inner peripheral surface of the pipe receiving member, the coating material is prevented from entering the pipe.

In addition, the lip and O-ring make the sealing more reliable.

(Embodiment) An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic view showing a use state of the present invention, and FIG. 2 is an enlarged sectional view of an essential part.

The paint intrusion prevention tool 1 according to the present invention comprises a pipe receiving member 2 made of aluminum, a masking member 3 made of silicon rubber for winding the pipe receiving member 2, and the masking member 3.
An O-ring 4 is provided around the outer peripheral end of the masking member 3, and a lip portion 5 is formed at the contact portion of the masking member 3 with the opening W1 of the bottomed pipe W.

Further, the pipe receiving member 2 has a substantially cylindrical shape having a through hole 6, and the outer diameter of the upper part and the outer diameter of the subsequent lower part are formed to be substantially the same as the inner diameter and the outer diameter of the bottomed pipe W, respectively. The opening end W2 of the bottomed pipe W is
Is formed with a stepped portion 7 for locking. Further, on the outer peripheral surface of the pipe receiving member 2, there is formed an annular concave portion 9 for fitting with the annular convex portion 8 formed on the inner peripheral surface of the masking member 3 in order to improve the close contact with the masking member 3.

When using the paint intrusion prevention tool 1 configured as described above to electrodeposit only the outer surface of the bottomed pipe W such as a cylinder of a shock absorber, first, before dipping the paint in the paint tank 10. Then, the opening W1 is inserted into the pipe receiving member 2 fixed in the hanger 12 until the opening end W2 of the bottomed pipe W is engaged with the step 7. Then, the opening W1 of the bottomed pipe W is sandwiched between the pipe receiving member 2 and the lip portion 5, and further coupled with the elastic force of the O-ring 4, the bottomed pipe W, the pipe receiving member 2, and the masking member 3 The contact part with is closely contacted.

At that time, the conduction electrons 13 connected to the hanger 12 pass through the through holes 6 of the pipe receiving member 2 and come into contact with the inner peripheral surface of the bottomed pipe W with a predetermined elastic force.

Then, the hanger 12 is conveyed by the conveyer 14 and the paint tank 1
The bottomed pipe W, which is the object to be coated, is immersed in the paint 11 of No. 0. Then, an air reservoir 15 is formed in the pipe receiving member 2 and the bottomed pipe W to prevent the paint 11 together with the lip 5 from entering the inner surface of the bottomed pipe W.

Incidentally, 16 is a DC power source, and 17 is a positive electrode. Therefore, the conduction member 13 is connected to the DC power source 16 via the conveyor 14 and the hanger 12, and the bottomed pipe W is negatively charged.
In addition, since the conducting electrons 13 are brought into contact with the inner surface of the bottomed pipe W, it is possible to reliably energize and to completely prevent the energization failure.

Further, since the masking member is made of silicon rubber, it has excellent heat resistance and chemical resistance and can be repeatedly used. Moreover, the pipe receiving member is made of aluminum so that the inner surface of the pipe is not damaged.

(Effects of the Invention) As described above, according to the present invention, it is possible to prevent the paint from entering the inside of the bottomed pipe, and further to ensure the sealing property by the lip portion and the O-ring.

Furthermore, the bottomed pipe can be easily attached to and detached from the paint invasion preventive tool, which contributes to a reduction in the number of workers.

[Brief description of drawings]

FIG. 1 is a schematic view showing a usage state of the present invention, and FIG. 2 is an enlarged sectional view of an essential part. In the drawings, 1 is a paint intrusion prevention tool, 2 is a pipe receiving member, 3 is a masking member, 4 is an O-ring, 5 is a lip portion, 15 is an air reservoir, W is a bottomed pipe, and W1 is an opening. .

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Akinori Fujino 924 Ozaki, Hanyu-shi, Saitama (56) Bibliographic references Sho 58-52288 (JP, Y2)

Claims (3)

[Scope of utility model registration request] 1. A pipe receiving member, which is inserted into an opening of the bottomed pipe immersed in the coating, with the bottom of the bottomed pipe facing upward, and the pipe receiving member and the opening of the bottomed pipe. A masking member to be wound, the pipe receiving member has a pipe shape whose upper side and lower side are open and has a length of a certain length or more, and the air trap formed in the bottomed pipe and the pipe receiving member. The pipe receiving member is inserted into the opening of the bottomed pipe by a predetermined length so that the vertical movement of the coating liquid surface due to the volume change is performed within the range of the inner peripheral surface of the pipe receiving member. Characteristic paint intrusion prevention tool for electrodeposition coating. 2. A paint intrusion preventing tool for electrodeposition coating or the like according to claim 1, wherein a lip portion is formed at a contact portion of the masking member with the bottomed pipe. 3. A paint intrusion prevention tool for electrodeposition coating or the like according to claim 1, wherein an O-ring is provided around the outer peripheral end of the masking member.