JPH075882Y2 - Mild steel coating jig - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a coating jig used in a coating line of an automobile or the like.

<Prior Art> In an automobile coating line, undercoating, intermediate coating, and topcoating are performed sequentially by transporting a body panel, etc. by a conveyor. As the coating method, the electrodeposition coating method and the spray coating method are generally used.
Baking and drying are performed as a post-process on each.

FIG. 7 shows a hook which is a carrying jig for carrying the bonnet hood. The hook 101 is formed by bending a single round bar made of mild steel, and has a base end 101a and a bonnet hood 10 that engage with a locking hole 102a at the end of the transfer arm 102.
It has a hanger portion 101b that engages with the three holes 103a. The bonnet hood 103 moves while being suspended from the hook 101, and moves on the coating / baking line.

On the other hand, FIG. 8 shows an example of a masking jig.
The masking jig 104 prevents the undercoat from adhering to the lower surface of the strut tower 105 for the front suspension. In addition to the masking disk 106 and the T-shaped handle 107 integrated with the masking disk 106, the strut mounting hole 105a of the strut tower 105 is also provided. It comprises a stopper 108 made of spring steel for fitting and locking. Reference numeral 109 is a clip for fixing the stopper 108 to the masking disk 106 and the T-shaped handle 107. Prior to spraying the undercoat, the worker inserts the masking jig 104 from below to fix the masking jig 104, and after the spraying, pulls out and removes.

<Problems to be Solved by the Invention> The above-described transport jig, masking jig, and the like had the following problems.

For example, the hook 101 shown in FIG. 7 is the hood 1
Since the reliable locking means for locking 02 is not provided, the bonnet hood 103 may fall off in the pretreatment dip tank or the spray zone, or the hanger portion 101b may cause the bonnet hood to fall due to shake during transportation. There was a case where it got into 103 and a convex portion was formed on the outer surface. on the other hand,
In the masking jig 104 shown in FIG. 8, in order to remove the undercoat adhering at the time of painting, it is generally burned out (burned by the fire and burned the undercoat). At that time, the stopper 108 made of spring steel is annealed. Sometimes it was done and it became unusable. In addition, since it is impossible to weld the spring steel when it is fixed, there are problems that the number of parts is increased and the manufacturing cost is increased.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a coating jig that can reliably lock an object to be coated by spring force while using mild steel.

<Means for Solving the Problem> Therefore, in order to solve this problem, the present invention welds the joining portions of the base ends of two mild steel round bars each having a locking portion formed at each tip. A mild steel coating jig which is manufactured by the following method and locks by engaging the locking part by inserting the locking part into the locking hole of the object to be coated and then separating the locking part from each other. The present invention proposes a mild steel coating jig whose length is different from the welding length of the other surface.

<Operation> Since a torsion spring force is generated between the two round bars due to the difference in the welding length at the joining portion, it is possible to perform the same locking as when using spring steel, while using mild steel that does not have annealing and is inexpensive.

<Embodiment> An embodiment of the present invention will be specifically described with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of a carrying jig according to the present invention, FIG. 2 is an enlarged view of arrow A in FIG. 1, and FIG. 3 is a view of arrow B in FIG. It is shown.

In FIG. 1, reference numeral 1 is a conveying jig, which is a round bar made of mild steel (SS41D, which is rolled steel for general structure in this embodiment).
It is manufactured by welding the hooks 2 and 3 of the book at their base ends 2a and 3a. The lower ends of the hooks 2 and 3 are bent to the left and right to form locking portions 2b and 3b. In the figure, 2c,
Reference numeral 3c is a grip portion formed in an annular shape.

As shown in FIGS. 2 and 3, the welding at the base ends 2a and 3a is performed up and down, and the welding length L of the upper surface is approximately twice the welding length 1 of the lower surface. The welding length 1 on the lower surface is about twice the material diameter d.

In this embodiment, as in the conventional one, after the transfer jig 1 is attached to the transfer arm 102, the locking portions 2b and 3b of the hooks 2 and 3 are inserted into the locking hole 103a of the hood hood 103. At this time, the operator grips the grip portions 2c and 3c with his / her hand to reduce the distance between the locking portions 2b and 3b and insert the grip portions. Although the hooks 2 and 3 are made of mild steel, they are elastically deformed like spring steel due to the torsion spring force due to the difference in the welding lengths L and 1 above and below the joining portion. After that, when the hand is released, the shapes of the hooks 2 and 3 are restored, so that the locking portions 2b and 3b expand to the left and right inside the locking hole 103a, and the bonnet hood 103 and the transport jig 1 are integrated.

As a result, the bonnet hood 103 did not fall off during transportation. On the other hand, since the locking portions 2b and 3b of the hooks 2 and 3 have a shape that expands in the left-right direction, even if the hooks 2 and 3 swing during transportation, they may come into contact with the outer plate of the hood 103 and cause damage. lost.

FIG. 4 is a perspective view showing an embodiment of a masking jig according to the present invention, and FIG. 5 is an enlarged view of arrow C in FIG.
FIG. 6 shows the arrow D in FIG.

In FIG. 4, reference numeral 4 denotes a masking jig, which mainly comprises a masking disk 5 made of mild steel and two locking bars 6, 7 made of mild steel (SS41D) round bar. Both locking bars 6 and 7 are welded to each other at their base ends (lower ends) 6a and 7a so as to have a substantially V shape. In the figure, 8 is a locking bar made of a round bar welded to the locking portions 6b, 7b of both locking bars 6, 7. One locking bar 6 is welded to the masking disk 5, and the other locking bar 7 is loosely fitted in an elongated hole 5a formed in the masking disk 5.

As shown in FIGS. 5 and 6, in this masking jig 4 as well, the welding at the base ends 6a and 7a is performed up and down as in the above-described transport jig 1, but the welding length L of the upper surface is Contrary to the transport jig 1, it is about 1/2 of the welding length 1 on the lower surface. The welding length L on the upper surface is about twice the material diameter d.

In this embodiment, the masking jig 4 is used as the strut tower 10.
Grip both locking bars 6 and 7 by hand when attaching to 5. Then, as in the case of the transport jig 1, the joint portion is elastically deformed by the torsion spring force due to the difference in the welding lengths L, 1 above and below the joint portion, and the locking bar 7 swings with respect to the masking disk 5. Then, since the included angle θ between the two locking bars 6 and 7 becomes small, it becomes possible to insert both the locking portions 6b and 7b and the locking piece 8 into the strap mounting hole 105a. Then, when the hands are released, the shapes of both the locking bars 6 and 7 are restored and the locking portions 6b and 7b spread to the left and right above the strut mounting holes 105a, and the strut tower 105 and the masking jig 4 are integrated. It

In this embodiment, since the masking jig 4 is made of mild steel instead of spring steel, no annealing occurs even if the masking jig 4 is pulled out. In addition, because the material is inexpensive and the welded structure was combined, the manufacturing cost could be greatly reduced.

Although the description of the specific embodiments is finished above, the aspect of the present invention is not limited to these embodiments. For example, in the above-mentioned embodiment, a rolled steel for general structure (SS
However, a rolled steel material for welded structure (SM material) or the like may be used. Further, the ratio of the welding length at the joining portion of the base end was 1: 2 in the above-mentioned embodiment, but it is also possible to use a ratio higher than this, and the difference in the welding length is the opposite of the above-mentioned embodiment and the upper and lower surfaces. It may be set.

<Effect of the Invention> According to the present invention, the torsion spring force generated by the difference in the welding length at the joining portion between the mild steel round bars is utilized to lock the coating jig and the object to be coated. In addition, the manufacturing cost can be reduced by using the weldable mild steel as the material, and at the same time, there is an effect that annealing does not occur even at the time of burning off.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a carrying jig according to the present invention, FIG. 2 is an enlarged A arrow view in FIG. 1, and FIG. 3 is a B arrow view in FIG. Is. FIG. 4 is a perspective view showing an embodiment of a masking jig according to the present invention, FIG. 5 is an enlarged C arrow view in FIG. 4, and FIG. 6 is a D arrow view in FIG. Is. FIG. 7 is a perspective view showing a conventional transfer jig,
FIG. 8 is a perspective view showing a conventional masking jig. In the drawings, 1 is a transfer jig, 2 and 3 are hooks, 2a and 3a are bases, 2b and 3b are locking parts, 4 is a masking jig, 5 is a masking disk,
6 and 7 are locking bars, and 8 is a locking piece.

Claims (1)

[Scope of utility model registration request] 1. A welded part formed by welding the joint portions of the base ends of two round rods made of mild steel, each of which has an engaging part formed at its tip, and the engaging part holds the object to be coated. A mild steel coating jig that locks by being separated from each other after being inserted into a hole, characterized in that the welding length of one surface of the joining portion is different from the welding length of the other surface. Mild steel coating jig.