JPH0792619A - Method for attaching flare preventing frame for film unit with lens - Google Patents

Abstract

PURPOSE:To provide a method for rationalizing the productivity and the production of a film unit with a lens and for surely attaching a flare preventing frame to the film unit with lens by simplifying attaching machine and stage in the case of fixing the flare preventing frame to the film unit with lens. CONSTITUTION:The flare preventing frame 13 is placed on a positioning stage 26 being the upper surface of an arm 25. Caulking parts 20a and 20b are provided on both ends of the stage 26 and holes 22a and 22b of the frame 13 are fitted to attaching pins 19a and 19b integrally provided with the dark box part 11 of the film unit with the lens 1, then the tip parts 19c and 19d of the attaching pins 19a and 19b are compressed and crushed by the caulking parts 20a and 20b of the arm 25 and extended to the caulking parts 20a and 20b. Thus, the frame 13 is caulked and fixed in the film unit with lens.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting a flare prevention frame in a lens-fitted film unit.

[0002]

2. Description of the Related Art A lens-fitted photo film unit is a unit having a simple photo-taking mechanism and a pre-exposed photo film with a photo film cartridge built-in. It is easy to take a photo without carrying the camera. Therefore, the applicant of the present invention offers "Shaken Run Econo Shot" (trade name) etc. widely at a low price.

In this lens-fitted film unit, when the shutter button is pressed after the film has been wound up, the shutter blades are opened and closed, and a subject image is displayed on the film set in the aperture. Exposed. The taking lens is provided on a lens substrate having a diaphragm opening, and a flare prevention frame is provided between the lens substrate and the aperture. The flare prevention frame is formed with an opening that is substantially similar to the aperture, and cuts the light flux of the subject light that has entered from the aperture opening and is directed toward the outside of the photographic screen to reduce flare.

When such a flare prevention frame is assembled to a lens-fitted film unit, conventionally, a chuck mechanism for holding the flare prevention frame places the flare prevention frame at a predetermined position of the lens-fitted film unit and then caulks it. The mechanism fixed the lensed film unit and the flare prevention frame by caulking.

[0005]

However, in order to fix the flare prevention frame to the lens-fitted film unit as described above, the step of placing the flare prevention frame on the lens-fitted film unit and the mounted flare prevention unit. Two steps, a step of fixing the prevention frame to the lens-fitted film unit by caulking, are required, which has been a problem in terms of productivity and rationalization of the lens-fitted film unit.

Further, after the flare prevention frame is placed on the lens-fitted film unit, it may be displaced from the position where the flare prevention frame is fixed by the vibration of the machine or the like until it is heat caulked.

The present invention has been made to solve the above-mentioned problems, and when the flare prevention frame is fixed to the lens-fitted film unit, the mounting machine and the process are simplified so that the lens-fitted film unit is It is an object of the present invention to provide a method for ensuring the productivity and the rationalization of manufacturing, and for surely attaching a flare prevention frame to a lens-fitted film unit.

[0008]

In order to achieve the above object, the present invention holds a lens-fitted film unit so that the eyepiece side faces downward when attaching the flare prevention frame to the lens-fitted film unit. The arm for mounting the prevention frame and attaching it to the lens-fitted film unit is provided with a caulking portion, and using this arm, sets the flare prevention frame to the mounting position of the lens-fitted film unit from below and at the same time This is a method in which the flare prevention frame is caulked and attached by the caulked portion.

Further, according to the present invention, when the flare prevention frame is attached to the lens-fitted film unit, the flare prevention frame is fixed to an arm for mounting the flare prevention frame and attaching it to the lens-fitted film unit. A method for holding and a caulking part are provided respectively, and using this arm, the flare prevention frame is set at the mounting position of the film unit with lens, and at the same time, the flaring prevention frame is caulked and mounted by the caulking part provided on this arm. is there.

Further, according to a third aspect of the present invention, the upper surface of the caulking portion of the first or second aspect is recessed from the peripheral portion by 0.1 to 0.5 mm.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a perspective view of a lens-fitted film unit embodying the present invention. The main body 1 of the lens-fitted film unit is a main body 2 incorporating a simple photographing mechanism.
The front cover 3 and the rear cover 4 are attached to the. The main body 2 is provided with a cartridge room 7 for accommodating the cartridge body 6 of the photographic film cartridge 5 and a film roll chamber 9 for accommodating the unexposed film 8 drawn from the cartridge body 6 in a roll shape. ..

A dark box portion 11 is provided between the cartridge chamber 7 and the film roll chamber 9 and an aperture 12 for defining a photographing screen is formed. The rear cover 4 has a lid 4
A is rotatably formed, and by opening it, the photographed film cartridge 5 which has been taken can be taken out from the cartridge chamber 7. Although not shown, the lens-fitted film unit is used in a state in which the unit body 1 is covered with a packaging body such as a paper box.

Inside the dark box portion 11, there is provided a flare prevention frame 13 which cuts a light beam traveling outside the photographing screen and prevents flare. As shown in FIG. 3, the opening 14 has short-side edges 21a and 21b in the shape of a convex arc, and long-side edges 21c and 21d are straight. Since the edges 21a and 21b are arcuate shapes that are convex inward, the reflected light is dispersed and the amount of flare generated is reduced. In addition,
Tangent lines 23a, 23b of the edges 21a, 21b and edges 21c, 2
The rectangle composed of 1d and the aperture 12 is substantially similar to the aperture 12, and the photographing screen is not eclipsed by the edges 21a and 21b. Further, mounting holes 22a and 22b are formed on the short side of the flare prevention frame 13, and the mounting pin 19 of FIG. 2 is inserted and fixed by caulking, which will be described later in detail.

FIG. 4 shows a film unit with a lens,
FIG. 2 is a perspective view showing a state in which a flare prevention frame is attached according to the present invention, and FIG. 1 is a cross-sectional view around the flare prevention frame at that time. The arm 25 for attaching the flare prevention frame is configured to move up and down by a pneumatic mechanism (not shown), and the flare prevention frame 13 is fitted and mounted on the positioning stage 26 on the upper surface of the arm 25. Placed.
At both ends of the positioning stage 26, the caulking portions 20a,
20b is provided.

The flare prevention frame 13 is attached to the mounting pins 19a and 19b integrally provided on the dark box portion 11 of the lens-fitted film unit 1 held with the eyepiece side facing downward.
Holes 22a and 22b of the arm 25 are respectively inserted, and the caulking portions 20a and 20b of the arm 25 compress and crush the tip portions 19c and 19d of the mounting pins 19a and 19b, respectively.
flare prevention frame 1
3 is fixed to the lens-fitted film unit 1.

The operation of the above configuration will be described. FIG. 5 is a schematic view showing an assembling process of the main body of the lens-fitted film unit. The lens-fitted film unit 1 that has flowed in from the carry-in conveyor 31 from the previous step is held on a circular conveyor called a rotary table 32. The rotary table 32 rotates clockwise,
Around it, there is each assembling process of the lens-fitted film unit 1 shown by A to X, and the machines required for assembling each,
Jigs and the like are arranged, and necessary parts are automatically supplied by the conveyor 33. The rotary table 32 is stopped in each of the assembling steps A to Z, and the assembly and the like are all performed automatically.

The flare prevention frame 13 is attached to the lens-fitted film unit 1 at the T portion of the rotary table 32. FIG. 6 is an explanatory view showing a mounting process of the flare prevention frame. A large number of flare prevention frames 13 are stacked on the stocker 36, and the setting plate 37
However, one flare prevention frame 1 from the bottom of the stocker 36
3 is pushed out and placed on the positioning stage 26 of the arm 25. The arm 25 rises at the same time when the flare prevention frame 13 is placed, and enters the dark box portion 11 of the lens-fitted film unit 1 held by the dark box holding mechanism 38 so that the eyepiece side faces downward.

When the arm 25 rises to the set position, the mounting pins 19a and 19b shown in FIG. 4 are fitted into the holes 22a and 22b of the flare prevention frame 13, respectively, and at the same time, the tip portions 19c and 19d of the mounting pins 19a and 19b are removed. , Arm 25
The caulking portions 20a and 20b are compressed and crushed, the tip portions 19c and 19d are expanded into the caulking portions 20a and 20b, and the flare prevention frame 13 is caulked to the mounting pins 19a and 19b. As a result, the flare prevention frame 13 is set from the setting to the lens-fitted film unit 1 to the fixing to the arm 2
It is carried out by one reciprocating motion of 5.

The lens-fitted film unit 1 to which the flare prevention frame 13 is attached in this way is then sent to the next step by the carry-out conveyor 39 through the steps U to X.

FIG. 7 shows an embodiment in which an arm for attaching the flare prevention frame is provided with a suction mechanism for holding the flare prevention frame. In this embodiment, the lens-fitted photo film unit is held horizontally, and the arm 41 moves laterally to assemble the flare prevention frame 13.

When the flare prevention frame 13 is set on the positioning stage 42 of the arm 41, the suction pipe 43 is decompressed at the same time, and the flare prevention frame 13 is suctioned and fixed to the suction portion 44. The arm 41 moves laterally at the same time that the flare prevention frame 13 is adsorbed by the adsorption portion 44, and enters the dark box portion 46 of the lens-fitted film unit.

When the arm 41 moves to the set position, the mounting pins 19a and 19b are moved to the holes 22a and 22a of the flare prevention frame 13, respectively.
22b respectively, and at the same time, mounting pins 19a, 1
The tip portion of 9b is the caulking portion 48a, 48b of the arm 41.
Are compressed and crushed by, and the tip ends of the mounting pins 19a and 19b spread into the caulking portions 48a and 48b, and the flare prevention frame 13 is caulked to the mounting pins 19a and 19b. As a result, the flare prevention frame 13 is set in the film unit with lens 1 from being set to being fixed by one reciprocating operation of the arm 41.

[0023]

As described above, according to the method for mounting the flare prevention frame in the lens-fitted film unit of the present invention, the arm for mounting the flare prevention frame and mounting it on the lens-fitted film unit is provided with the caulking portion. Since the flare prevention frame is caulked and attached by the caulking portion provided on this arm, the process of placing the flare prevention frame on the lens-fitted film unit and the film unit with lens attached by caulking the mounted flare prevention frame It is possible to integrate the process of fixing to the lens, and to promote the productivity and the rationalization of the film unit with lens.

Further, since the flare prevention frame is set on the lens-fitted film unit and is caulked and fixed at the same time,
After setting the flare prevention frame, the flare prevention frame will no longer be displaced from the set position due to machine vibration or the like.

[Brief description of drawings]

FIG. 1 is a cross-sectional view around a flare prevention frame when a flare prevention frame is attached to a lens-fitted film unit according to the present invention.

FIG. 2 is an exploded perspective view of a lens-fitted film unit to which a flare prevention frame is attached according to the present invention.

FIG. 3 is a plan view of a flare prevention frame used in the present invention.

FIG. 4 is a perspective view showing a state in which a flare prevention frame is attached to a lens-fitted film unit according to the present invention.

FIG. 5 is a schematic view of a process of assembling a film unit with a lens.

FIG. 6 is an explanatory diagram showing a process of attaching a flare prevention frame.

FIG. 7 is a cross-sectional view of another embodiment in which a flare prevention frame is attached to the lens-fitted film unit according to the present invention.

[Explanation of symbols]

 1 Film Unit with Lens 11 Dark Box Part 12 Aperture 13 Flare Prevention Frame 14 Opening 19 Mounting Pin 20 Caulking Part 22 Hole 25 Arm 26 Positioning Stage 43 Adsorption Pipe 44 Adsorption Part

Claims (3)

[Claims] 1. When attaching to a lens-fitted film unit a flare prevention frame for preventing flare at the time of photographing by the lens-fitted film unit, the lens-fitted film unit is held with the eyepiece side facing downward, In order to fix the flare prevention frame to the lens-fitted film unit, an arm for mounting the flare prevention frame and mounting it on the lens-fitted film unit is provided with a fixing pin integrally projected on the lens-fitted film unit. A caulking part for caulking the tip is provided, and the flare prevention frame is set from the lower side to the mounting position of the film unit with a lens by using the arm, and at the same time, the caulking part caulks the tip of the fixing pin to attach the flare. How to attach the prevention frame. 2. A flare prevention frame for preventing flare at the time of photographing by a lens-fitted film unit, when mounting the flare prevention frame on the lens-fitted film unit when mounting the flare prevention frame on the lens-fitted film unit. Means for fixing and holding the flare prevention frame to the arm, and for fixing the flare prevention frame to the lens-fitted film unit, the tip of a fixing pin integrally provided on the lens-fitted film unit is caulked. And a caulking portion for fixing the flare prevention frame at the mounting position of the lens-fitted film unit using the arm, and at the same time caulking the tip of the fixing pin with the caulking portion. 3. The method for mounting the flare prevention frame according to claim 1, wherein the upper surface of the caulking portion is recessed more than the peripheral portion thereof.