JPH0113577Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic coating machine for helmets.

If you try to paint something other than a simple sphere, such as a helmet, by rotating it at a constant speed, the paint won't be applied evenly, and the thickness of the paint film will vary, making it difficult to paint beautifully. There is a problem that it cannot be painted properly.

The present invention is intended to solve the above-mentioned problems, and its purpose is to provide an automatic coating machine for helmets and the like that can form a uniform coating film with a relatively simple structure.

That is, the present invention has a rotary support 2 provided on a coating machine stand 1.
A plurality of helmet rotation shafts 3 are installed upright, and a shaft drive unit 5 is interposed on the shaft 3 to rotate the helmet 4 at an inconstant speed according to the rotation radius of each part of the helmet 4 on the shaft. A coating gun 7 is disposed at a predetermined position on the side of the support body 2 and is movable up and down by an elevating shaft 6, and its gun head 8 is formed so as to be movable up and down reciprocatingly by a gun arm 9. This is an automatic coating machine for helmets, etc., which is connected to an arm drive unit 10 so that the moving speed is non-uniform at different positions. In the illustrated embodiment, four rotating shafts 3 are rotatably installed at equal intervals on a circular table-shaped rotating support 2, and the shafts 3 direct the helmet 4 toward the center at the coating start position. It has a cam 11,
It engages with a helmet position defining guide 12 installed on the rotating edge of the support 2 rotating clockwise in FIG.

The shaft drive section 5 includes a motor 13, a sprocket 14 that changes the rotation of the motor into eccentric rotation, a sprocket 16 and an arm 17 that are pivotally supported on a shaft 15 of the sprocket 14, and a sprocket that is pivotally supported on the other side of the arm 17. Chain 1 hung between 16'
8, and an inconstant velocity sprocket 19 attached to the automatic shaft 3 so as to be able to engage and disengage from the chain 18.
It consists of At the other end of the drive arm 17 is a chain 1.
A cylinder 20 is installed to control the engagement and disengagement between the helmet 8 and the non-constant velocity sprocket 19, and the rod extends upon receiving a position detection signal from the relevant helmet 4 prior to the start of painting, and contracts when painting is completed. and return to the original position.

The painting gun 7 has a planar L-shaped gun arm 9 mounted on the upper end of the lifting shaft 6, and a gun head 8 is attached to the tip of the gun arm 9 via a member 21 for adjusting the distance and direction from the helmet 4. , it reciprocates up and down together with the reciprocating sprocket 23 mounted on the reciprocating rotation shaft 22. That is, the drive chain 24 of the sprocket 23 is connected to the tension roller 2.
5, the centroid sprocket 26 and the floating sprocket 27 are rotated by the rotation of a pair of large sprockets 29, 29' driven by a motor 28, which causes the centroid sprocket 26 to move up and down. This vertical movement is slow before and after the vertical position of the eccentric sprocket 26 that is pivotally supported by the large sprocket 29, and becomes high speed on the left and right sides, but at low speed the arm 9 moves to the lower part of the helmet 4, and at high speed it moves to the upper part. They are synchronized to move. The upper and lower operating limits of the gun arm 9 are determined by a detection element 3 such as a limit switch.
0,30'. A bevel gear 31 is screwed onto the elevating shaft 6, and the paint gun 7 is raised and lowered as a whole by rotating the other bevel gear 31' that is screwed onto the elevating shaft 6 using a motor 32. 33 is a lifting guide for the painting gun 7; 34 is a tensioner 25 which is pivotally supported;
This is a tension lever that acts to absorb the slack of 4. In each figure, 36 is a rotating shaft of the rotating support 2, 37 is a drive mechanism for the rotating shaft 36, and 38 is a paint tray.

The present invention has the contents as explained above, and can be rotated at an inconstant speed according to the rotation radius of the helmet 4 supported by the rotating shaft. The gun head 8 is rotated slowly in the large range a, and fast in the small radius range b, such as the second half, and by operating the gun 7 quickly in the upper part of the helmet and moving it slowly in the lower part. Even though the paint ejected from the gun head is constant and the object to be coated is a non-spherical rotating body, the area coated (moved) per unit time of the gun head can be kept constant, so uniform coating can be achieved efficiently. It produces effective results.

[Brief explanation of the drawing]

The figures show an embodiment of the automatic coating machine for helmets and the like according to the present invention. Fig. 1 is a side view, Fig. 2 is a plan view, Fig. 3 is a side view of main parts, and Fig. 4 A and B are FIG. 4 is an explanatory plan view and a side view showing a moving state of the gun head. DESCRIPTION OF SYMBOLS 1... Painting machine stand, 2... Rotating support body, 3... Helmet rotation shaft, 4... Helmet, 5...
...Shaft drive unit, 6... Lifting shaft, 7... Painting gun, 8... Gun head, 9... Gun arm, 10
...Arm drive section.

Claims (1)

[Scope of utility model registration request] A plurality of helmet rotation shafts 3 are erected on a rotating support 2 provided on a coating machine stand 1, and the helmet 4 is rotated at an inconstant speed according to the rotation radius of each part of the helmet 4 on the shaft. A coating gun 7 is disposed at a predetermined position on the side of the rotary support 2 and is movable up and down by a lift shaft 6, and its gun head 8 is movable up and down reciprocally by a gun arm 9. formed into
This automatic coating machine for helmets is connected to an arm drive unit 10 so that the arm 9 moves at an inconstant speed from the upper position to the lower position.