JPH0794200B2 - Coating film peeling device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a coating film peeling device for peeling a coating film formed on the inner wall of a painted tube-shaped product (hereinafter referred to as a processed product). Regarding

(Prior Art) Conventionally, when coating the outer surface of a tubular product, the coating material often wraps around and adheres to the inner surface to form a coating film. Such adhesion of the paint to the inner surface is not only unfavorable in appearance, but also causes a dimensional error in the inner diameter, and in the case of a component having a screw groove formed on the inner surface, the screw groove is filled. Cause Therefore, in such a case, the coating film formed on the inner surface must be peeled off after coating. The peeling of the coating film is usually carried out by an automatic coating film peeling device equipped with a rotatable wire brush. The wire brush of such an automatic coating stripping device is
For example, it has a shape as shown in FIG. In the apparatus, the wire brush 5'has an arrow C as shown in the figure.
In the direction indicated by the arrow, and is then automatically rotated, whereby the coating film 16 'is peeled off.

(Problems to be Solved by the Invention) However, when the coating film is peeled by the above method, a brush (wire brush) having a diameter slightly larger than the inner diameter of the object to be treated must be used. Therefore, the hair tips are always loaded. When used in such a state for a long period of time, the hair tips are damaged and the coating film cannot be peeled off satisfactorily. Also, in normal painting,
In many cases, the paint wraps around the periphery of the object to be processed, but the above method requires a brush because the brush tip hits a relatively wide area outside the area. It will result in more damage. In addition, if the brush is eccentric for some reason, a stronger load is applied,
The brush will be damaged.

Further, in the coating film peeling apparatus, brushes of various sizes are required according to the size of each article to be treated. Therefore, the cost for a large number of brushes is increased, and it is necessary to select a brush of an appropriate size and change the brush every time the size of the object to be processed changes, which complicates the work. Occurs. In addition, the method of using such a large number of brushes is also disadvantageous in terms of storage space.

Therefore, an object of the present invention is to provide a coating film peeling device capable of treating objects having different diameters with a single brush, the technical problem of which is to prevent the brush from being damaged. Even if the diameter of the product changes, the load on the bristle tips should be kept constant.

(Means for Solving the Problems) In order to achieve the above-mentioned problems, the coating film peeling apparatus of the present invention is a coating film peeling apparatus for peeling a coating film adhered to the inner wall of a coated tubular product, A brush provided so that the central axis of the brush is positioned obliquely with respect to the central axis of the fixed tubular product and rotatable about the central axis of the brush, and rotation for rotating the brush. Means, swirling means for swiveling the brush around the central axis of the tubular product, the brush and the tubular product, the central axis of the tubular product and the central axis of swirling of the brush And a moving mechanism that relatively moves them toward and away from each other in a matched state.

As the brush, any brush such as a wire brush in which metal wires are radially implanted around the shaft, a plastic brush in which a synthetic resin wire is implanted, which is commonly used, can be used.

An air motor or the like can be used as the rotating means of the brush.

As the brush rotating means, for example, a shaft rotatable by a motor may be used, and a brush may be attached via a bracket or the like so as to be positioned obliquely with respect to the central axis of the shaft. In this case, in order to rotate the brush while contacting the inner wall of the peripheral edge of the object to be processed, the rotation axis of the shaft and the center axis of the object to be processed are aligned, and the center axis of the brush and the rotation axis of the shaft are the same. Need to be offset, and the brush needs to be positioned at an angle to the object to be processed so that only part of the bristle tips contacts the object to be processed.

A cylinder, for example, can be used as the moving mechanism that moves the brush and the article to be processed closer to and away from each other. Preferably, the brush and the rotating means and the swiveling means thereof are housed in one housing, and the housing is moved up and down by a cylinder. Further, even if the object to be processed is raised and lowered instead of raising and lowering the brush, the same effect as raising and lowering the brush can be obtained.

The rotation and rotation of the brush will be described with reference to the schematic diagram of FIG. When the rotating means and the turning means of the brush (wire brush) 5 are operated, as shown in the figure, the brush 5 rotates around the rotation axis m of the shaft 4 while rotating around the central axis 1 of the brush. Turn. At this time, the upper bristle tip draws a small circle α, and the lower bristle tip draws a large circle β. Therefore, by changing the distance between the brush and the object to be processed by the moving mechanism that brings the brush and the object to be processed close to and away from each other, and by changing the portion of the brush that contacts the inner wall of the object to be processed,
Objects 8a and 8b having different inner diameters can be processed. This allows the brush to rotate while
It is possible to swivel along the inner surface of the peripheral end portion of the object to be treated and to remove the paint adhering to the inner surface.

As described above, the distance between the brush and the object to be processed needs to be changed depending on the diameter of the object to be processed. This operation may be performed manually each time, but preferably, it is automatically detected by a detecting means for detecting the diameter of the article to be treated and a means for moving the brush and the article to be approached or separated from each other according to the detected diameter. To do it.

Therefore, the coating film peeling apparatus of the preferred embodiment of the present invention,
In addition to the above-mentioned means, the detection means that optically detects the diameter of the tubular product and the position where the brush should contact the tubular product are determined according to the detected diameter of the tubular product. And a control means for moving the brush to the position.

In the coating film peeling device, the diameter of the article to be processed is detected by the detecting means, and the information is sent to the control device, whereby the moving mechanism is operated and the brush can be moved to an appropriate height.

As the detecting means, for example, an optical sensor including a light emitting device and a light receiving device can be used. For example, a plurality of light emitters are arranged in parallel at one of the set positions of the article to be processed of the above device, and light receivers are arranged in parallel at positions corresponding to the respective light emitters in the opposite direction, and the light from the light emitters is An optical sensor is used that can measure the diameter of the object to be processed by the number of sensors received without being blocked by the object to be processed. In this case, only the outer shape of the article to be processed is detected, but the brush can be moved to an appropriate height by inputting the relationship between the outer diameter and the inner diameter into the control means. is there.

(Function) In the coating film peeling apparatus of the present invention, the brush rotates while rotating itself while part of the bristles is in contact with the inner surface of the peripheral end portion of the object to be treated, The formed coating film is peeled off. The position of the bristles of the brush that comes into contact with the article to be treated varies depending on the size of the diameter of the article to be treated, but the tip of the bristles used in the treatment of a certain article to be treated has a coating film attached. Since it is only the part that contacts the inner wall of the peripheral edge, no load is applied to other parts of the bristle tip, and the contact between the bristle tip and the article to be treated is relative to the brush and the article to be treated. By adjusting the position, the hair is always kept in an ideal state, so that damage to the hair tips is minimized.

Also, since the diameter of the circle drawn when swirling is different between the upper and lower parts of the brush, changing the distance between the brush and the product to be processed will change the diameter Can be processed.

(Examples) Hereinafter, the present invention will be described in more detail with reference to Examples.

FIG. 1 is a view showing a coating film peeling apparatus 1 of the present embodiment, and FIGS. 2 and 3 are views showing a part of the coating film peeling apparatus 1 as seen from a side surface and a front surface, respectively.

The coating film peeling apparatus 1 includes two sets of shafts 4 and a pair of shafts 4 in a housing 3 which is vertically movable by a cylinder 2.
Brush 5 and air motor 6 attached to the
And a speed reducer 7 for a shaft rotating motor. Above the housing 3, a conveyor 9 for conveying the article 8 to be processed, a guide 10 for preventing shaking, a clamp 11 for fixing the article 8 to be processed during processing, and a cylinder for operating the clamp. 12, an optical sensor 13 for detecting the diameter of the article to be processed is provided. The optical sensor 13
A plurality of light emitters 13a, 13a ... And a plurality of light receivers 13b, 13b. The light emitters 13a, 13a ... Are arranged in parallel at one of the set positions of the article to be processed of the above device, and the light receivers 13b, 13b ... are arranged in parallel at the positions corresponding to the respective light emitters in the opposite direction. Thus, the diameter of the object to be processed can be measured by the number of sensors that receive the light from the light emitter without being blocked by the object to be processed. Further, although not shown, a control device for operating the cylinder 2 to move the wire brush 5 to an appropriate position is provided according to the detected diameter of the article to be processed 8. A rotary joint 15 is provided at the bottom of the housing 3 below the shaft 4, and air for the air motor 6 is sent from the rotary joint 15 through a space inside the shaft 4.

A sprocket 14 is provided on each of the speed reducer 7 for the shaft rotating motor and the two shafts 4. Since these are linked by a sprocket chain, the two shafts 4 rotate when the motor is operated. ing.

The wire brush 5 and the air motor 6 are arranged such that the upper part of the central axis of the brush is inclined to the shaft side.
It is attached to the shaft 4 by a bracket 16.

The coating film peeling apparatus 1 of the present invention operates as follows.

The housing 3 is lowered to the lowest position until the article 8 to be processed is conveyed. The wire brush 5 is rotated in the direction of arrow A by the air motor 6, and at the same time, is rotated around the shaft in the direction of arrow B by the rotational force transmitted from the reducer 7 of the motor through the sprocket 14 and the sprocket chain. There is. When the article 8 to be processed is conveyed, the clamp 11 operates to fix the article 8 to be processed. After that, the diameter of the processed product is detected by the optical sensor,
The result is transmitted to the control means, the cylinder 2 operates, the housing 3 moves up, and the wire brush 5 is moved to an appropriate position. At this time, as shown in FIG. 5, a part of the bristle tips of the wire brush 5 is in contact with a portion of the inner surface of the peripheral end portion of the article to be treated 8 where the coating material wraps around, and the wire brush itself rotates. While turning along the inner surface, the coating film peels off.

(Effect of the Invention) In the coating film peeling apparatus of the present invention, the brush rotates while rotating itself along the inner surface of the article to be processed, and the coating film formed on the surface is peeled off. The brush is in contact with only the inner wall of the peripheral end portion of the object to be processed, and moreover, the brush contacts the inner surface of the object to be processed in an ideal state without being excessively pressed against the object to be processed. Can be kept to a minimum. Thereby, a significant cost reduction can be achieved. Also, as the brush rotates, the diameter of the circle drawn by the bristles varies depending on the position of the bristles.Therefore, by changing the position of the bristles that come into contact with the object to be treated, one brush can change the diameter of the treated object. Goods can be processed. Therefore, the cost of the brush can be reduced, and it is not necessary to store the brushes of various sizes according to the size of the article to be processed, so that the space can be saved. Furthermore, the operation when changing the object to be processed to one with a different diameter is easy because it only changes the distance between the brush and the object to be processed,
Work efficiency is improved.

[Brief description of drawings]

1 is a front view of a coating film peeling apparatus according to an embodiment of the present invention, FIG. 2 is a side view of a part of the coating film peeling apparatus of FIG.
FIG. 3 is a front view of a part of the coating film peeling apparatus of FIG. 1, FIG. 4 is a schematic view showing an operating state of a brush of the coating film peeling apparatus of FIG. 1, and FIG. 5 is FIG. FIG. 6 is a cross-sectional view showing a brush portion of the coating film peeling device of FIG. 6, and FIG. 6 is a cross-sectional view showing a part of a conventional coating film peeling device. 1 ... Coating film peeling device, 2 ... Cylinder 3 ... Housing, 4 ... Shaft 5 ... Brush, 6 ... Air motor 7 ... Motor reducer, 8 ... Processed product

Claims (2)

[Claims] 1. A coating film peeling device for peeling a coating film adhering to the inner wall of a coated tubular product, wherein a central axis of the brush is fixed at an angle to the central axis of the tubular product. And a rotating means for rotating the brush, and a rotating means for rotating the brush around the central axis of the tubular product. The coating film peeling includes a moving mechanism that relatively moves the brush and the tube-shaped product toward and away from each other in a state where the center axis of the tube-shaped product and the center axis of the brush swirl coincide with each other. apparatus. 2. A detection means for optically detecting the diameter of the tubular product, and a position where the brush should come into contact with the tubular product according to the detected diameter of the tubular product, The coating film peeling apparatus according to claim 1, further comprising a control means for moving the brush to the position.