JPH0348215Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> The present invention relates to an electro-deposition coating device, and its purpose is to take measures against paint film defects due to insufficient energization.

<Conventional technology> When applying electrodeposition coating to a long object such as an automobile chassis frame that has an internal cavity with a closed cross section,
Air accumulates in the cavity, making it impossible to form a coating in that area, so it is common practice to shake the object to be coated within the electrocoating tank in order to move or expel the air.

As shown in FIG. 3, this conventional electrodeposition coating apparatus has a swinging frame 2 installed in an electrodeposition coating tank 1 in which an anode electrode plate 3 is placed in the paint solution, and is supported on the swinging frame 2. The member 4 is installed, the cathode electrode plate 5 is attached to the upper end of the support member 4, the chassis frame W is placed on this electrode plate 5, and the swing frame 2 is swung by an external actuator, and the support member 4 This is a structure in which the chassis frame W is swung using the fulcrum as a fulcrum.

<Problems to be Solved by the Invention> In the conventional apparatus described above, defects in the thickness of the coating film occurred due to the following reasons.

That is, the electrode plate 5 on the support member 4 has a sawtooth-like uneven surface as shown in FIG.
This is provided to prevent the chassis frame W from shifting due to buoyancy due to rocking. However, this uneven surface causes the electrodeposited paint to peel off, and the paint residue adheres to the uneven surface, clogging the electrode contact surface and causing a current shortage.

Also, during rocking, the chassis frame W and the electrode plate 5
Due to uneven contact, a certain amount of current did not flow, causing the electrocoating equipment to stop due to an abnormality.

Conventionally, this problem has been solved by applying two electrodeposition coatings, but this has resulted in extremely poor production efficiency.

<Means for Solving the Problems> The present invention provides an electrodeposition coating device that improves the above-mentioned conventional problems. In an electrodeposition coating device in which a member supports an object to be coated and swings the object to be coated using the supporting member as a fulcrum, the supporting member is constituted by a plurality of electrode plates arranged in parallel at a required interval. The tip of the electrode plate has a convex arc shape, and the electrode plate is arranged to be movable up and down following the swinging of the object to be coated.

<Operation> In the present invention, with the above-described configuration, the electrode plates move up and down following the swinging of the object to be coated, and the tips of the plurality of electrode plates are always in contact with the object to be coated. Furthermore, the convex arc surface at the tip of the electrode plate makes curved contact with the object to be coated, ensuring a contact area for supplying sufficient current.

<Example> Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2. The configuration of the electrocoating device, including the electrocoating tank, the swinging frame, and the electrode plate of the anode, is the same as the conventional device shown in Figure 3. This is an improved support member for the object W to be coated. That is, in FIGS. 1 and 2, 4a is an improved support member. Its structure is such that a mount 10 is fixedly mounted on a swing frame 2, and a pair of C-shaped frames 11 are fixed to the left and right sides of this mount 10. Vertical guide members 12 are fixedly disposed opposite to each other on this C-shaped frame 11, and an electrode plate 13 is slidably guided thereto. The upper end of this electrode plate 13 is formed into a convex circular arc surface 13a, and a stopper shaft 14 is fixed to the lower end. A spring 15 is also provided between the upper surface of the lower end of the C-shaped frame 11 and the lower end surface of the electrode plate 13.
is interposed, and this spring 15 causes the electrode plate 1 to
3 is always pushed upward, and the rising end is regulated by the stopper shaft 14.

A power supply mounting bar 17 is fixed to the C-shaped frame 11, and a flexible conductive member 16 made of a braided wire or the like is attached to the power supply mounting bar 17 and the electrode plate 13 to allow the electrode plate 13 to move up and down. It is connected.

C-shaped frame 11 and electrode plate 13 as described above
As shown in Fig. 1, the structure consisting of
0, at least two are arranged in parallel at a required interval in the front and back direction, and power supply mounting bars 17 are connected between the front and rear C-shaped frames 11 with an auxiliary power bar 17a, and a power cable 18 is connected to one C-shaped frame 11. do.

Since the present invention has the above-mentioned structure, the electrode plates 13 arranged in parallel in the front and rear are pushed up by the spring 15 to the rising end regulated by the stopper shaft 14, but the chassis frame W is not allowed to swing. When set on the frame 2 and supported on the upper end of the electrode plate 13, the electrode plate 13 moves downward to a position where the weight of the chassis frame W is balanced and supported by the spring 15. At this time, when the swing frame 2 is in a horizontal state, the chassis frame W is also in a horizontal state, and the front and rear electrode plates 13 that come into contact with the lower surface of the chassis frame W are equally lowered.

When the swing frame 2 is rocked by an external actuating device (for example, a vertically moving cylinder), the chassis frame W tilts and swings in the front-rear direction using the support member 4a as a fulcrum. When the chassis frame W swings, as shown in FIG.
is further compressed and moves downward, and the other electrode plate 13 on the upper side of the slope moves upward.
also moves up and down following the rocking of the chassis frame W. Further, the upper end of the chassis frame W and the electrode plate 13 are brought into contact with each other by the convex arcuate surface 13a, so that the chassis frame W is in curved contact with the upper end of the electrode plate 13 both in the horizontal state and in the swinging state, ensuring a sufficient contact area for energization. It provides a smooth fulcrum action without peeling off the paint film.

<Effects of the invention> As described above, according to the invention, at least two support members, each of which has a convex arc surface at the tip and which constantly moves up and down to follow the swinging of the object to be coated, are used as fulcrums for the oscillating object. With the above-described parallel electrode plate configuration, there is no uneven contact as in the conventional case, and sufficient current can be obtained, and there is no need to peel off the paint film or cause insufficient current due to peeled paint scum. , a stable current value can be obtained, and there is no need for twice electrodeposition, which has the advantage of improving productivity.

[Brief explanation of drawings]

FIG. 1 is a side view of the main parts of the device of the present invention, FIG. 2 is an enlarged view taken in the direction of the arrow in FIG. 1, FIG. 3 is a sectional view of the conventional device, and FIG. 4 is a side view of the supporting member of the conventional device. 1...electrodeposition coating tank, 2...swing frame, 3...
...Electrode plate, 4a...Support member, 11...C-shaped frame, 12...Guide member, 13...Electrode plate, 1
3a... Convex arc surface, 14... Stopper axis, 15...
…spring.

Claims (1)

[Scope of utility model registration request] In an electrocoating apparatus that supports an object to be coated by a support member equipped with an electrode in an electrodeposition coating tank and swings the object to be coated using this support member as a fulcrum, the support members are arranged in parallel at a required interval. The electrode plate has a convex arc-shaped tip,
An electrodeposition coating apparatus characterized in that the electrode plate is provided so as to be movable up and down in accordance with the swinging motion of the object to be coated.