JP2535391Y2 - Film reverse winding detector in film splicer - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting reverse winding of a spirally wound film supplied to a film splicer.

[0002]

2. Description of the Related Art It has been common practice to connect a large number of undeveloped films one after another and to continuously develop the connected film.

[0003] A film splicer is used to form the above-mentioned film connector. The film splicer takes out the undeveloped spiral-wound film wound on the spool from the patrone outer cylinder supplied into the housing, sets the film in the film holder for unwinding, and rewinds the film by rewinding the film. After taking out the film and cutting and removing the tongue portion at the leading end of the film, the film is sent out toward the splice portion, and the leading end is connected to the trailing end portion of the previously sent film.

[0004] In most cases, the film in the cartridge supplied to the film splicer is wound around the spool in a normal winding state with the emulsion side inside, but sometimes the emulsion side is outside. May be wound in a reverse winding state.

When a film is spliced in a state in which a reverse-wound film is mixed with a normal-wound film, the direction of the emulsion surface of the normal-wound film and that of the reverse-wound film are different from each other. Alternatively, there is a risk that the emulsion surface may be damaged by contact with a guide for guiding the movement of the film.

Therefore, it is necessary to detect the winding direction of the undeveloped film before splicing, and to detect the reverse winding film, and remove the reverse winding film from the film splicer.

[0007]

In the conventional film splicer, a spiral film is set in a film holder for unwinding, and then the film is rewound and unwinded to perform unwinding. Since the emulsion side and the base side of the film are distinguished by the reflection type optical detector provided in the passage, if the film is reverse-wound, it is necessary to reverse the velocities of the film and wind up the tongue part. There was a problem that it took time to take out the reverse-wound film.

Further, since the detection light is made to impinge on the film surface at a right angle and the reflected light is received to determine the base surface and the emulsion surface, stable detection cannot be performed. That is, the base surface of the film is glossy,
On the other hand, since the emulsion surface is whiter than the base surface, the difference in the amount of reflected light is small, and it is extremely difficult to determine.

This invention solves the above-mentioned conventional disadvantages,
A technical object is to facilitate the removal of a reverse-wound film and to stabilize the detection accuracy by being able to determine the winding direction of the film in a state where the film is set in a film holder for velocities. .

[0010]

In order to solve the above-mentioned problems, in the present invention, the film accommodating section has a film accommodating section having a film accommodating section accommodating a spirally wound undeveloped film. A reflective optical detector is provided that irradiates an infrared ray to the outer peripheral surface of the film pressed against the inner periphery of the film and detects the winding direction of the film based on the presence or absence of the reflected light. A configuration was adopted in which the irradiation line of the light beam was inclined with respect to a straight line connecting the irradiation position on the outer periphery of the film and the center of the film.

[0011]

The film reverse winding detecting device having the above-described structure irradiates an infrared ray from the detector to the outer periphery of the film when the spiral film is set in the film holder for velocities. Detect the winding direction.

In the case where the film is a normal-winding film having the emulsion side inside, the reflected light of the infrared light applied to the outer periphery of the film does not reflect to the detector side, and the detector receives the reflected light. Can not.

On the other hand, in the case of a reverse-wound film having the emulsion surface on the outside, reflected light of infrared rays is irregularly reflected, and a part of the scattered light is detected by a detector to determine that the film is a reverse-wound film. it can.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. As shown in FIGS. 1 and 2, a film holder 1 for velocities has a plurality of support plates 2 arranged in parallel at a predetermined interval, and an arc-shaped film is provided on one side of each support plate 2. A storage section 3 is provided.

An upper guide 4 and a lower guide 5 are swingably connected to upper and lower portions on one side of the film holder 1 via pins 6 and 7. The upper guide 4 is a cylinder 4a
The lower guide 5 is opened and closed by the cylinder 5
It is opened and closed by a.

The spirally wound film F wound by the spool S is moved by the operation of the film supply device to the film holder 1.
Is supplied to the film accommodating section 3. At this time, the upper guide 4 is in an open state, and when the film F is supplied to the film accommodating section 3, the upper guide 4 closes to prevent the film F from moving from the film accommodating section 3.

FIG. 4 shows an example of a film supply device for supplying the film F to the film storage section 3. The film supply device includes an opposing side plate 12 of a lifting frame 11 that is moved toward the film storage unit 3 by the operation of the cylinder 10.
Slidably supports a pair of gripping shafts 13 and 14 disposed coaxially with each other.
16 is moved inward by the operation of
Is inserted inside the both ends of the spool S to support the film F from both sides, and the film F is supplied to the film storage unit 3 by the operation of the cylinder 10.

The film F accommodated in the film accommodating section 3 is moved to the upper guide 4 when the upper guide 4 is closed.
And between the lower guide 5 and the lower guide 5. Although not shown in the drawing, the tongue is brought into contact with the tongue roller at the outer periphery of the film F, and the rotation of the roller causes the film F to rotate.

A reflection type optical detector 8 is provided below the film holder 1 between a pair of supporting plates 2 opposed to each other. The detector 8 irradiates the outer periphery of the film F accommodated in the film accommodating section 3 with infrared light, and determines the winding direction of the film F based on the presence or absence of the reflected light.

Here, the detector 8 emits infrared rays,
It is provided so as to be inclined with respect to a straight line L connecting the irradiation position (a) of the film outer periphery and the film center O.

Now, when the spirally wound film F for splicing is supplied to the film accommodating portion 3 and pressed against the inner periphery of the film accommodating portion 3, the infrared light emitted from the detector 8 is applied to the outer periphery of the film F. collide.

If the film F is a normal winding film with the emulsion surface inside, the infrared light is reflected in the direction of the arrow as shown in FIG. Can not.

On the other hand, if the film F is a reverse-wound film having the emulsion surface on the outside, the infrared light emitted from the detector 8 collides with the emulsion surface and is irregularly reflected as shown in FIG. , A part of the scattered light is detected by the detector 8. Therefore, the winding direction of the film F can be determined by receiving the scattered light.

As described above, the discrimination of the winding direction of the film F is performed before the work of unwinding the film F.
It is easy to take out the reverse wound film. At the time of removal, both the upper guide 4 and the lower guide 5 are opened, and the film F is dropped from the film accommodating section 3.

[0025]

As described above, in the present invention, the winding direction of the film can be determined in a state where the spirally wound film is supplied to the film accommodating portion, so that the reverse winding film can be easily taken out.

Further, since the infrared light is applied to the outer periphery of the film pressed against the inner periphery of the film accommodating portion and the reflected light is received, the winding direction of the film is determined.
It is hardly affected by the curving of the film and the like, and extremely accurate and stable detection is possible.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing an embodiment of a reverse winding detection device according to the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIGS. 3A and 3B are diagrams showing a detection state of a film winding direction;

FIG. 4 is a partially cutaway front view of a supply device that supplies a film to a film holder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Film holder 3 Film storage part 8 Detector

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-91955 (JP, A) JP-A-59-206747 (JP, A) JP-A-60-31140 (JP, A) 282555 (JP, A) Shokai Sho 59-60653 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. A tongue-out film holder having a film accommodating portion for accommodating a spiral undeveloped film,
A reflective optical detector is provided that irradiates an infrared ray to the outer peripheral surface of the film pressed against the inner periphery of the film storage unit and detects the winding direction of the film based on the presence or absence of the reflected light. Film reverse winding detecting device in a film splicer in which the irradiation line of the infrared ray of the container is inclined with respect to a straight line connecting the irradiation position on the outer periphery of the film and the center of the film.