JP2829661B2 - Posture control method for molded products - Google Patents

Description

The present invention relates to a method of controlling a posture of a molded product, and more particularly, to a method of elastically deforming a molded product when a visual inspection of the molded product is performed using a TV camera. This is to make it easier to put the inspected part of the molded product into the view of the TV camera.

[Conventional technology]

An image processing system using a TV camera has been developed to inspect the appearance of molded products.As part of this, an attitude control device that elastically deforms the molded product and makes it easier for the inspected part of the molded product to enter the field of view of the TV camera has been developed. Is being developed. The appearance inspection is performed in order to check whether or not the formed product has a surface defect such as unnecessary unevenness.

This will be described by taking the oil seal (1) of FIG. 3 as an example. In the appearance inspection, the outer peripheral surface (3) of the annular lip (2) provided on the oil seal (1), the groove for fitting the garter spring is fitted. If (4) is present, the outer peripheral surface (3) is inspected for surface defects using the inner wall of the groove (4) (including the same hereinafter) as a portion to be inspected. The whole annular lip (2) is formed of rubber-like elastic material. This oil seal (1) is fitted into the upper surface concave portion (6) of the rotating (5) as shown in FIG. 4, and is arranged upward while being rotated together with the turntable (5) by a driving source (not shown). Photographed by TV camera (7). The reason why the oil seal (1) is rotated is that the imaging area of the TV camera (7) is fixedly determined and the oil seal (1) is inspected over the entire circumference. When the TV camera (7) is arranged above the oil seal (1), the annular lip (2)
The outer peripheral surface (3) of the camera cannot be put into the field of view of the TV camera (7), and the TV camera (7) and the outer peripheral surface (3) of the annular lip (2) do not face each other even in the field of view. May not be able to obtain a perfect image. For this reason, the conventional
An attitude control device provided with a pressing member (8) as shown in the figure is provided, and the pressing member (8) is moved forward and backward in the direction of the arrow by a driving source (not shown), and the annular lip (2) is moved by the pressing member (8). A part is tilted in the inner circumferential direction, and shooting is performed in this state.

[Problems to be solved by the invention]

 The following problems are pointed out with respect to the above conventional technology.

That is, first, the pressing member (8) presses and deforms one portion of the circumference of the annular lip (2), so that the shooting area of the TV camera (7) is changed to the position where the annular lip (2) is deformed. It is necessary to make them coincide with each other, so that the installation of the TV camera (7) is troublesome, and the installation is not flexible.

Second, in order to remove the TV camera (7) from the operating range of the pressing member (8), it is necessary to install the TV camera (7) far from the oil seal (1), and thus the TV camera (7) A long focal length lens must be used. Third, a lens having a long focal length is generally expensive and uneconomical. Third, the mounting and dismounting work for fitting and fixing the oil seal (1) to the upper surface concave portion (6) of the rotating (5) is complicated.
Each time the outer diameter of the oil seal (1) is different, a turntable (5) having a recess (6) of a different size must be prepared.

[Means for solving the problem]

In view of the above, the present invention has been made to solve the problems found in the above-described conventional technology, and has an annular lip made of a rubber-like elastic material in order to solve this problem. A molded product obtained by integrally forming a film-like burr on the inner peripheral side near the tip is concentrically placed on a rotary table with the tip of the annular lip facing upward, and is surrounded by the annular lip, the burr, and the rotary table. A method of controlling the attitude of a molded product in which the interior of the space is evacuated so that the molded product is attracted to the turntable and the annular lip is tilted inwardly.

(Operation)

A film-like burr is integrally formed on the inner peripheral side near the tip of the annular lip to form an airtight space surrounded by the annular lip, the burr, and the turntable when the molded product is placed on the turntable. In this state, the molded article is sucked to the turntable by being evacuated by vacuuming the airtight space, and the driven lip is rotated. Perform Burrs will be removed in a later step. Molded products include various types of lip seals such as dust seals in addition to oil seals.

〔Example〕

As shown in FIG. 1, a film-like burr (9) is integrally formed on the inner periphery of the tip of the annular lip (2) of the oil seal (1),
The oil seal (1) is concentrically mounted on a turntable (5) having a flat upper surface and the tip of an annular lip (2) is directed upward. A hole (10) is provided to connect the piping to a vacuuming operation (not shown). From this state, the annular lip (2) and the burr (9)
Then, the space (11) surrounded by the rotary table (5) is evacuated, and as shown in FIG. 2, the oil seal (1) is adsorbed to the rotating (5) and driven to rotate, and the annular lip (2) is rotated. Is simultaneously tilted inward over the entire circumference, and the outer peripheral surface (3) of the annular lip (2) is photographed by the TV camera (7) disposed above the oil seal (1).

 This method has the following effects.

That is, first, the space (1) in the oil seal (1)
Since the annular lip (2) is simultaneously tilted over the entire circumference by evacuating 1), a desired position on the circumference can be photographed by the TV camera (7), and the TV camera (7) Installation work is simplified and the degree of freedom of installation is expanded.

Second, it is located above the oil seal (1).
Since only the TV camera (7) is used, the TV camera (7) can be brought close to the oil seal (1), and a relatively inexpensive lens having a short focal length can be used for the TV camera (7).

Third, since the space (11) in the oil seal (1) is evacuated and the oil seal (1) is adsorbed on the turntable (5), the attaching / detaching operation is simple. In addition, this adsorption equipment can be used as it is for the oil seals (1) having different outer diameters, and the versatility is excellent.

〔The invention's effect〕

As described above, the control method of the present invention places the molded product on which the film-shaped burrs are formed on a turntable, evacuates the interior, adsorbs the molded product to the turntable, and moves the annular lip toward the inner peripheral side. Since it is inclined, various operations can be facilitated and the work cycle can be shortened, and excellent effects can be obtained in terms of economy and versatility.

[Brief description of the drawings]

FIG. 1 and FIG. 2 are explanatory views showing working procedures of a posture control method according to an embodiment of the present invention, FIG. 3 is a sectional view of an oil seal, and FIG. 4 and FIG. FIG. (1) ... oil seal (molded product), (2) ... annular lip (3) ... outer peripheral surface, (4) ... groove, (5) ... turntable (6) ... upper surface concave portion, ( 7) TV camera (8) Pressing member (9) Burr (10) Suction hole (11) Space

Continuation of the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) G01B 11/00-11/30 G01N 21/84-21/91

Claims (1)

(57) [Claims] 1. A molded product (1) having an annular lip (2) made of a rubber-like elastic material and integrally forming a film-like burr (9) on an inner peripheral side near a tip of the annular lip (2). Turntable (5)
The annular lip (2) is placed concentrically on the upper surface with the tip of the annular lip (2) facing upward, and the space (11) surrounded by the annular lip (2), the burr (9) and the turntable (5) is evacuated. do it,
A method for controlling the attitude of a molded product, wherein the molded product (1) is adsorbed on a turntable (5) and the annular lip (2) is tilted inward.