Radiant energy – Photocells; circuits and apparatus – With circuit for evaluating a web – strand – strip – or sheet
Reexamination Certificate
1999-07-30
2001-11-13
Font, Frank G. (Department: 2877)
Radiant energy
Photocells; circuits and apparatus
With circuit for evaluating a web, strand, strip, or sheet
Reexamination Certificate
active
06316780
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a body attitude screening apparatus for a slide fastener slider used when a body of the slide fastener slider is supplied to an assembling device and the like.
2. Description of the Related Art
Conventionally, a guiding method has been mainly employed for a general body attitude screening apparatus of a slide fastener slider. In the guiding method, a plurality of parts in a bowl of the body attitude screening apparatus receive torsional vibrations so as to be fed onto a transferring passage and are screened based on their attitudes in a screening portion provided at a predetermined position of the apparatus, and only the parts in a desired attitude are supplied in sequence. The parts in other attitudes are dropped in the screening portion and returned into the bowl of the body attitude screening apparatus again.
In the guiding method, in many cases, the special transferring passage corresponding to a shape of the parts is used. For attitude screening of parts in different shapes, it has been necessary to adjust the transferring passage and the screening portion to be suitable for the shapes of the respective parts.
There is proposed an attitude screening apparatus as disclosed in Japanese Patent Publication No. 60-14739, wherein electrically detecting means and eliminating means are provided to the screening portion to mechanically eliminate parts in attitudes other than a desired attitude.
In the case of the former prior art, a special transferring passage corresponding to a shape of each slider body is necessary in the body attitude screening apparatus, and sharing of the same body attitude screening apparatus for screening the attitude of the bodies in different shapes is impossible. Changing of the transferring passage and the screening portion for each kind of body requires experience and a large number of steps of operation.
When the latter prior art apparatus is used for supplying the body of the slide fastener slider, a shape of the body of the slide fastener slider is peculiar and intricate and it is extremely difficult to electrically and optically sense the attitude of the body based on an outside shape of the body. Furthermore, when a technique such as a pattern recognition is used, a structure of a sensing portion becomes intricate.
SUMMARY OF THE INVENTION
The present invention has been developed with the above-described problems of prior art in view, and it is an object of the invention to provide a body attitude screening apparatus for a slide fastener slider, wherein it is unnecessary to adjust the apparatus to be adapted to each body, sharing of the same apparatus for screenings of the bodies in the different shapes is possible, and switching for adapting the apparatus to different kinds of bodies is easy.
To achieve the above objects, according to the invention, there is provided a body attitude screening apparatus for a slide fastener slider for transferring bodies along a transferring passage, sensing attitudes of the bodies, and supplying only the bodies in a desired attitude. Each of the bodies has a flat upper and lower plates disposed in parallel to each other, a connecting post connecting the upper and lower plates, and a tape groove defined between the upper and lower plates. The apparatus comprises a sensing portion which is provided at the transferring passage on which the bodies are transferred and which electrically senses the attitudes of the bodies. And the sensing portion has a presence/absence distinguishing sensor for distinguishing presence and absence of each the body and an attitude distinguishing sensor for distinguishing the attitude of each the body in a direction orthogonal to a traveling direction of the body based on sensing of the presence/absence distinguishing sensor.
The attitude distinguishing sensor has two pairs of adjacent light emitting portions and light receiving portions and the attitude distinguishing sensor is disposed to distinguish the attitudes of the bodies based on two states, i.e., a state in which one of lights passing between the two pairs of light emitting portions and light receiving portions passes through the tape groove of each the body moving on the transferring passage and a state in which both the lights are intercepted by the connecting post of the body moving on the transferring passage. The transferring passage has a transferring face inclined in a direction orthogonal to the traveling direction of the bodies and a guide portion connected to the transferring face along a lower end of the transferring face and projecting perpendicularly to the transferring face, any ones of the light emitting portions and the light receiving portions are disposed in the guide portion, and the others are disposed at a distance from the ones of the light emitting portions and the light receiving portions to face the ones of the light emitting portions and the light receiving portions.
The light emitting portions and the light receiving portions are disposed at diagonal positions displaced forward and backward from each other with respect to the traveling direction of the bodies. In addition, the presence/absence distinguishing sensor has a light emitting portion and a light receiving portion disposed at positions on front and rear face sides of the transferring passage to face each other with the transferring passage disposed therebetween.
REFERENCES:
patent: 5065898 (1991-11-01), Michalewski et al.
patent: 5201205 (1993-04-01), Zieve et al.
patent: 5823356 (1998-10-01), Goodrich et al.
Kaizawa Syuuichi
Matsushima Wataru
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Font Frank G.
Stafira Michael P.
YKK Corporation
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