JPH0822079A - Mount for slide film - Google Patents

Abstract

PURPOSE:To easily and accurately position small-sized film for slide on a film mount in such a case. CONSTITUTION:A pair of projection parts 36 is formed on either mount 28 and set at the same pitch dimension as perforations 24A and 24B. By inserting the projection parts 36 in the perforations 24A and 24B, the position of an image frame 14A is always made constant. A circular groove 40 is formed on the other mount 30 corresponding to the projection part 36. By superposing two mounts 28 and 30, the tip part of the projection part 36 is housed in the circular groove GO and reversal film 14 is prevented from falling down.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided with perforations provided in advance at a predetermined interval for a single image frame area so that each image has a constant relative position with respect to the perforation. The present invention relates to a slide film mount for sandwiching and holding a slide film photographed in Section 2 between two removable mounts.

[0002]

2. Description of the Related Art A conventional 135 size photographic film or the like is provided with perforations (rectangular holes) at a predetermined pitch in advance.
This perforation is fitted with a sprocket when loaded in the camera to give a driving force to the photographic film, and it corresponds to a contact provided on the camera side to check whether the photographic film is conveyed correctly. It has a role of detecting whether or not.

Further, in recent years, a photographic film has been proposed in which a predetermined number of perforations are provided in advance for one image frame at predetermined intervals.

This photographic film has a width dimension smaller than the 135 size and has a compact shape.

Here, there is a slide film (reversal film) in the photographic film, and such a film is cut for each frame, and is sandwiched and held by a pair of mounts called a film mount. It has become.

The slide film is enlarged and projected by a projector. Since positioning with respect to the projector is based on the outer shape of the film mount, it is preferable to position the film mount and the slide film accurately.

Particularly, in the film having a small width,
When the image is projected in the same size as the conventional 135, it is necessary to further increase the enlargement magnification, and as a result, it is necessary to further improve the positioning accuracy.

In view of the above facts, an object of the present invention is to obtain a slide film mount which can be easily and accurately performed when positioning a small size slide film on the film mount.

[0009]

According to a first aspect of the present invention, a predetermined number of perforations are provided in advance at a predetermined interval for one image frame area, and each image has the perforations and the respective perforations. A mount for a slide film for sandwiching and holding a slide film photographed so that a relative position is constant, the mount being provided on one mount, and at least two of the perforations are provided. A pair of protrusions that are formed to have the same size as the pitch size and that position the slide film on one mount by inserting the selected at least two perforations, and the pair of protrusions in a mounted state of the two mounts. It is provided on the other mount so as to correspond to the protruding portion, and the perforation enters the protruding portion while the other And a, a retaining means for preventing detachment of the slide films from the projections by overlapping mount.

[0010]

According to the first aspect of the present invention, the perforation is made to enter the protrusion formed on the one mount. Since the relative position of this perforation with respect to the image frame is constant, the mount and the slide film can be positioned by inserting into this protrusion.

After that, by overlapping the other mount on the one mount, the slip-out preventing means corresponds to the protrusion to prevent the slide film from slipping off, and the two mounts are fitted together. The slide film is sandwiched and held.

By thus performing the positioning with reference to the perforation, the slide film can be accurately and easily positioned between the two mounts, and even if the enlargement ratio is increased more than ever, There is no problem that the projection position shifts, and the viewer of the projected image does not feel uncomfortable.

[0013]

EXAMPLE FIG. 1 shows a reversal film 14 according to this example.

The reversal film 14 is provided with two perforations 24A and 24B for each image frame 14A. The perforations 24A and 24B are preliminarily drilled and are used for positioning, for example, when the perforations are mounted on the camera. Therefore, the position of the image frame 14A is
Positioning is performed by the perforations 24A and 24B, and each image frame 14A and the corresponding 2
The relative positions of the individual perforations 24A and 24B always match. Also, two perforations 2
4A and 24B are located at both ends of the corresponding image frame 14A in the reversal film transport direction.

Here, the reversal film 14 is
Each image frame 14A is cut (see FIG. 2), and as shown in FIG. 3, each frame is mounted (mounted) on the film mount 26. As shown in FIG. 2, the reversal film 14 cut for each image frame 14A has two perforations 24 each.
A and 24B will be provided.

As shown in FIG. 3, the film mount 2
6, the two mounts 28, 30 are connected at one side, and the two mounts 28, 3 are rotated by rotating the one side.
It is possible to set the state in which 0s are overlapped and the state in which the 0s are opened.

A hook 32 and a notch 34 that engages with the hook 32 are provided on the two mounts 28 and 30 in correspondence with each other, and the hook 32 is engaged with the notch 34 in a superposed state. Together, the overlapping state is maintained.

Further, as shown in FIG. 4A, one mount 28 has a pair of projections 36 formed on the surface of which the other mount 30 is superposed. The pitch dimension of the protrusions 36 is the same as the pitch dimension of the perforations 24A and 24B. The protrusion 36 is cylindrical, whereas the perforations 24A and 24B are substantially square (strictly speaking, the four corners are arcuate), and the diameter of the protrusion 36 is the perforation 24A.
It is almost the same as the size of one side of 24B. Therefore, when the perforations 24A and 24B enter the protrusion 36, all four sides of the perforations 24A and 24B come into contact with the peripheral surface of the protrusion 36.

Therefore, when the perforations 24A and 24B enter the protrusion 36, the image frame 1
The position of 4A can always be a fixed position.

Further, the two mounts 28 and 30 are provided with a rectangular hole 38 which is substantially the same as the image frame 14A in advance, and by overlapping the two mounts, only the image frame 14A is exposed. The base portion around the image frame 14A can be clamped.

A circular groove 40 is formed on the other mount 30 corresponding to the protrusion 36. The circular groove 40 has a function of accommodating the leading end of the protrusion 36 and preventing the reversal film 14 from falling off by superimposing the two mounts 28 and 30.

The operation of this embodiment will be described below. The reversal film 14 is cut into individual image frames 14 </ b> A after the development processing, and each is mounted on the film mount 26.

That is, the reversal film 14 cut for each image is made to correspond to one mount 28. At this time, the protrusions 36 having the same pitch dimension as the perforations 24A and 24B are formed, and the perforations 24A and 24B are inserted into the protrusions 36.

The projection 36 has a cylindrical shape, and the perforations 24A and 24B have a substantially square shape. However, since the diameter of the projection 36 is equal to the dimension of one side of the square, the four sides of the perforation 24A are surrounded by the circumference of the projection 36, respectively. It can come into contact with the surface and fit in tightly. Therefore, the reversal film 14 is supported by two points (two protrusions 36) and positioned.

Next, the other mount 30 is rotated around one side and is superposed on the one mount 28. At this time, since the reversal film 14 is loaded on the one mount 28, the reversal film 14 is sandwiched between the two mounts 28 and 30.

When the two base sheets 28 and 30 are superposed, the hook 32 is engaged with the cutout portion 34, and the sandwiched state is maintained.

The procedure for assembling the film mount 26 has been described above. As in this embodiment, the projection 36 is engaged with the perforations 24A and 24B whose relative positions are always constant with respect to the image frame 14A. Thus, the reversal film 14 for each image frame 14A can be easily positioned on the mount 28.

Further, the reversal film 14 applied to this embodiment is smaller than the width dimension of the conventional 135 film and the image frame 14A is also small. Therefore, when the image is projected by the projector, the enlargement magnification must be increased in order to enlarge it to the same size as the conventional 135. When the enlargement magnification is increased, a slight deviation appears as a large deviation on the enlarged projection. However, as in the present embodiment, by positioning and mounting with the perforations 24A and 24B as a reference, accurate mounting work can be performed. Therefore, it is possible to project without any discomfort even at a large magnification.

In this embodiment, the pair of protrusions 36 have the same shape. However, as shown in FIG. 4B, one protrusion 36A has an elliptical shape and only the upper and lower sides of the perforations are positioned. If there is a gap between the left and right sides, the reversal film 14 can be easily attached to the protrusions 36A and 36B. That is,
One of the perforations 24A is first inserted into the elliptical projection 36A. At this time, insertion is easy because there is a slight degree of freedom in the left-right direction. Next, the perforation 24B is inserted into the other columnar protrusion 36B in a state where the vertical position is determined. At this time, since the elliptical projection 36A and the perforation 24A are restricted within the relative movement range, the insertion work can be simplified.

[0030]

As described above, the slide film mount according to the present invention has an excellent effect that the small size slide film can be easily and accurately positioned in the film mount.

[Brief description of drawings]

FIG. 1 is a plan view of a reversal film according to this embodiment.

FIG. 2 is a plan view of a reversal film cut for each image frame.

FIG. 3 is a perspective view of a slide film mount according to the present embodiment.

FIG. 4A is an enlarged view of the vicinity of the protrusion according to the present embodiment,
(B) is an enlarged view of the vicinity of the protrusion according to the modification.

[Explanation of symbols]

 14 reversal film 14A image frame 24A24B perforation 26 film mount 28, 30 mount 36 protrusion 40 circular groove (prevention means)

Claims (1)

[Claims] 1. A slide film provided with perforations provided in advance at a predetermined interval for a single image frame area, and each image is photographed so that its relative position is constant with respect to the perforation. To
A slide film mount for sandwiching and holding between two sheets, which is provided on one sheet and is formed with the same pitch dimension as at least two pitches of the perforations. A pair of protrusions for positioning the slide film on one mount by inserting the perforations, and a pair of protrusions provided on the other mount so as to correspond to the pair of protrusions when the two mounts are mounted, A slide film mount comprising: a retaining means that prevents the slide film from coming off from the protrusion by overlapping the other mounts with the perforations entering the protrusion.