JPH073550B2 - Split photography device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a divisional photographing device for exposing a plurality of images on one photosensitive material.

[Background technology]

In the field of medical diagnosis, an image on a monitor TV is often divided and photographed on one sheet film. The sheet film having the plurality of images may be cut into each image after the image capturing is completed.

Japanese Patent Application Laid-Open No. 55-60937 discloses this divisional photographing device. In this photographing apparatus, since the film is supported horizontally, the film may lose its flatness due to its gravity. In order to solve this problem, the applicant has proposed a divisional photography apparatus in which a film is held vertically and an image is exposed (Japanese Patent Laid-Open No. 162944/1983).
issue). In this divisional photographing device, the rotation of the motor is converted into the vertical movement of the sheet film by the crank mechanism, and the sheet film is vertically moved with respect to the exposure image to perform the divided exposure.

In this split-photographing device, when the image is exposed on the sheet film in two steps above and below, if the sheet film is stopped at the top dead center and the bottom dead center of the crank mechanism, the error in the stop position is reduced. It is possible to perform exposure at an accurate position.

However, in this crank mechanism, when the image is exposed on the sheet film in three or more stages above and below, the exposed image in the upper and lower intermediate portions does not become the top dead center or the bottom dead center of the crank, so that the stop position of the crank mechanism is not changed. There is a problem that the error becomes large.

In view of the above facts, an object of the present invention is to obtain a divided photographic device capable of accurately maintaining the image exposure position even when the exposed image is divided and photographed in three or more steps. [Outline and Action of the Invention] The present invention is a divided photography apparatus for exposing an image to a plurality of locations on a photosensitive material, which is fixed to a holding means for the photosensitive material and a rotating gear that rotates around a fixed gear. A planetary gear mechanism whose output end moves the holding means between three or more upper and lower dead centers, and drive means for driving the planetary gear mechanism,
It is characterized by having.

Therefore, in the present invention, the planetary gear mechanism surely stops the photosensitive material at the upper and lower dead points, whereby the exposure images of three or more stages can be accurately positioned and exposed on the photosensitive material.

If the planetary gear mechanism is provided with a fixed gear and a rotating gear that meshes with the fixed gear and rotates around the fixed gear, the portion other than the axis of the rotating gear has a trochoid curve locus, and therefore the top and bottom dead center Are formed in three or more places. If the rotary arm is fixed to the rotary gear, the rotary arm will have three or more top and bottom dead centers. Therefore, it suffices to pivotally support the connecting arm to the rotating arm and connect the connecting arm to the vertically movable photosensitive material holding means.

Example of Invention

FIG. 1 shows a split photography apparatus 10 according to this embodiment. In this split photography device 10, a monitor TV 14 is arranged in a box-shaped main body 12, and the upper surface thereof serves as a display surface. Corresponding to this display surface, shooting lens 16, shutter 1
8, a mirror 20 and a cassette 24 in the cassette holding means 22 are provided.

Therefore, the image on the monitor television 14 is projected and exposed on the cassette 24 by opening and closing the shutter 18, and is focused on the film 26 in the cassette 24.

The monitor television 14 is movable along a rail 28 laid in a direction perpendicular to the plane of FIG. 1, and can be moved on the rail 28 by the driving force of a motor 30.

As shown in FIG. 2, this motor 30 has one end of a rotary arm 34 fixed to an output shaft 32 thereof, and one end of a connecting arm 38 is pivotally supported by a pin 36 at the tip of the rotary arm 34. The other end of the connecting arm 38 is rotatably supported by a bracket 42 by a pin 40 to form a crank arm mechanism, and the bracket 42 is fixed to a monitor TV frame 44 to monitor the TV.
14 is driven in the left-right direction in FIG.

In this case, the pin 40 of the connecting arm 38 is in a state in which the state shown in FIG. 2 is moved to the left in FIG. 2 by the maximum amount, and the state in which the pin 40 is rotated 180 degrees is shown by an imaginary line. As described above, it is in a state of being moved to the right in FIG. 2 by the maximum amount.
That is, the pin 40 of the crank arm mechanism including the rotating arm 34 and the connecting arm 38 has the smallest amount of movement with respect to the amount of rotation of the rotating arm 34 at these two dead points, and the monitor TV 14 has a small error between the two positions. Can be stopped accurately.

A cam plate 39A is fixed to the output shaft 32 of the motor 30, and limit switches 39B and 39C for detecting the movement of the cam plate 39A are provided to detect the rotation stop position of the motor 30.

In the cassette holding means 22, the cassette 24 is set by the leaf spring 46.
Is pressed toward the projection side, and a through hole (not shown) provided in the cassette 24 is aligned with the exposure axis.
This through hole can be closed by a cover (not shown), and the cover can be pulled out with the cassette 24 inserted in the cassette holding means 22. When the cassette 24 is inserted into the cassette holding means 22, the cassette insertion port 50 of the main body 12 is closed by the cover 52. The cassette 24 may be provided with through holes on the front and back sides to accommodate two films so that the front and back sides can be exposed.

A drive mechanism 53 for driving the cassette holding means 22 is shown in FIGS. As shown in FIG. 4, this drive mechanism is for exposing images in the upper and lower three stages to the film 26 in the cassette.

As shown in FIG. 3, both ends of the cassette holding means 22 in the lateral direction are inserted into the grooves 56 of the guide 54 and guided so as to be vertically movable.

One end of a connecting arm 60 is pivotally supported by a pin 58 at the lower end of the cassette holding means 22, and the other end of the connecting arm 60 is pivotally supported by a pin 62 to one end of a rotating arm 64. . A pin 66 is fixed to the other end of the rotating arm 64,
The pin 66 penetrates the support arm 68 and is axially supported by the support arm 68, and a rotary gear is provided to the penetrating tip of the pin 66.
70 is stuck.

A shaft 72 is fixed to the other end of the support arm 68 by a key 74, and a fixed gear 76 is pivotally supported on the shaft 72.
The fixed gear 76 meshes with the rotary gear 70.

A boss 78 projects from the fixed gear 76 and is fixed to a fixed bracket 80 as shown in FIG. Therefore, the fixed gear 76 does not rotate, and the rotating gear 70 constitutes a planetary gear mechanism in which the rotating gear 70 revolves around the fixed gear 76.

The shaft 72 is connected to the output shaft of a motor 82, and the motor 82 is supported by the main body 12 via a support bracket 84.

As described above, the drive mechanism 53 is a combination of the planetary gear mechanism and the crank arm mechanism, and as shown in FIG.
As 70 revolves around fixed gear 76, rotating arm 64
Will rotate while revolving with the rotating gear 70.
62 forms a trochoid locus 86 as shown in FIG. 4 (A).

That is, as shown in FIG. 4 (A), when the rotary gear 70 is directly above the fixed gear 76 and the connecting arm 60, the rotary arm 64, and the support arm 68 are arranged in a straight line, the pin 62 and the trochoid locus 86. Has reached the first top dead center 62A. When the shaft 72 is rotated clockwise about 95 degrees from this state, the state shown in FIG. 4 (B) is obtained. In this state, the pin 62 is slightly before the first bottom dead center of the trochoid locus, and the rotary arm 64 faces downward with an inclination of about 10 degrees with respect to the vertical direction. Here, the pin 58 reaches the lowest point in the vertical direction. Further axis
When the 72 rotates, the rotating gear 70 reaches directly below the fixed gear 76,
As shown in FIG. 4 (C), the rotary arm 64 is a support arm.
Overlapping 68, pin 62 is the second top dead center of trochoidal track 86
It reaches to 62C.

Further, the shaft 72 rotates, and the rotary gear 70 reaches a state symmetrical to the state of FIG. 4 (B) via the fixed gear 76 as shown in FIG. 4 (D). That is, in this state, the pin 62 is at a position slightly behind the second bottom dead center 62D of the trochoid locus 86, and the pin 58 is at the same vertical position as the state of FIG. 4B, that is, the lowest point. Has become.

In this way, the pin 62 forms a trochoid locus 86, and the movement amount of the pin 62 is transmitted to the pin 58 via the connecting arm 60. The pin 58 together with the cassette holding means 22 guides the guide 54.
Since it moves up and down linearly along the line, the state shown in FIG. 4 (A) is the state in which the cassette holding means 22 and the cassette 24 are lifted by the maximum amount, and the states shown in FIGS. 4 (B) and (D). Is the state in which it is pulled down to the lowest position, and FIG. 4 (C) is in the state in which it has reached this intermediate point.

Here, since the vertical movement amount of each of the upper and lower dead centers 62A to 62D of the trochoid locus 86 is small in spite of the rotation of the motor 82 at the same speed, the cassette holding means 22 near the top dead center position and the bottom dead center position. Also, by stopping the cassette 24, the cassette holding means 22 and the cassette 24 can be accurately stopped regardless of the error in the stop position of the motor 82.

The shape of the trochoid locus is changed depending on the length of the support arm 68 and the like.

The pin 62 draws the trochoid locus shown in FIG. 4 when the fixed gear 76 and the rotary gear 70 forming the planetary gear mechanism have the same number of teeth.

The rotation control of the motor 82 is performed by the same configuration as the cam 39A and the limit switches 39B and 39C shown in FIG.

Next, the operation of this embodiment will be described.

First, a case will be described in which the exposure is performed on the left side of the six exposure positions shown in FIG. 4A in order from the upper frame to the lower frame.

The motor 30 shown in FIG. 1 is driven to arrange the rotary arm 34 and the connecting arm 38 on a straight line as shown in FIG. 2 so that the monitor television 14 corresponds to the left-side exposure portion shown in FIG.

Here, the motor 82 is driven to rotate the rotary gear 70 by about 95 degrees as shown in FIG. 4 (B). Therefore, in the cassette holding means 22, the projection light from the monitor TV 14 is
Is opened to project and expose the uppermost frame 26A in the left column as shown by the shaded frame in FIG. 4 (B).

If the motor 82 is driven and the rotary gear 70 is arranged immediately below the fixed gear 76, the cassette holding means as shown in FIG. 4 (C).
Since 22 is pulled up, the projection light is exposed to the intermediate piece 26B in the left column.

If the motor 82 is further driven to rotate the rotary gear 70 to the state shown in FIG. 4 (D) through the state shown in FIG. 4 (D), the cassette holding means 22 is lifted to the highest position and the projection light is emitted. It is exposed to the bottom piece 26C in the left column.

Since all of these exposures are at the upper and lower dead points of the crank arm mechanism and in the vicinity thereof, the vertical movement error with respect to the rotation of the motor 82 is extremely small.

Next, when exposure is performed on the right side column, the motor 30 may be rotated 180 degrees so that the monitor television 14 corresponds to the right side column.
Since the rotation stop position of the monitor television 14 also uses the top-bottom dead center of the motor 30, the error in the stop position is extremely small. Therefore, inexpensive and easily controlled motors such as induction motors and reversible motors can be used.

The order of projection exposure can be changed if necessary.
26C, intermediate piece 26B, uppermost piece 26A in the order of 4th exposure
It suffices to move in the order of FIGS. (A), (C), and (D). Also, the monitor TV is moved at each top-bottom dead center so that exposure is continuously performed at two positions on the left and right on each stage on the film. Good. .

The control of the drive mechanism described above may be performed by remote control.

Next, how to obtain the dimensions of each part when this embodiment is applied will be described.

First, the pitch P of the shooting frame is determined. Then, the pitch circle diameters of the gears 70 and 76 are determined according to this piece pitch. That is, if the pitch circle diameter of both gears 70 and 76 is l, this is equal to the length l ₁ of the support arm 68. In addition, FIG. 4 (A),
As shown in (C), the heights L ₁ and L ₂ from the shaft 72 at the uppermost position and the intermediate position of the cassette holding means 22 are related to (L ₁ −L ₂ ) = P (1) . Further, it is _{L 1 = l 1 + l 2} + l 3 ··· (2) L 2 = -l 1 + l 2 + l 3 ··· (3). However, l ₂ is the length of the rotating arm 64, and l ₃ is the length of the connecting arm 60. Therefore, the above (1), (2), (3)
From the formula, l ₁ + l ₂ + l ₃ − (− l ₁ + l ₂ + l ₃ ) = P ・ ・ ・ (4) 2l ₁ ＝ P ・ ・ ・ (5) l ₁ ＝ l = P / 2 ・ ・ ・ (6 ). Therefore, when the vertical feed amount of the film 26 is determined,
The diameter of the gears 70, 76 will be halved. In addition,
The value of l depends on the model of the gear, number of teeth, strength, etc.
It may not be possible to design depending on the value of P. In that case, it is necessary to change the value of P to some extent.

Next, the length l ₃ of the connecting arm 60 is set to an appropriate value in consideration of the mounting space and the like. Further, the length l ₂ of the rotating arm 64 is determined as follows. That is, the distance (y) between the pin 58 and the motor shaft is y = L ₁ = l ₁ + l ₂ + l ₃ ... (7) in FIG. 4 (A). in the state, the minimum value L ₃ of _{y, y = L 3 = l} 1 + l 2 + l 3 relationship -2P ··· (8) holds. Here, as shown in FIG. 3, the rotation angles of the support arm 68, the rotating arm 64, and the connecting arm 60 are θ and 2 respectively.
If θ and α, then y (θ) = l ₁ cos θ + l ₂ cos ₂ θ + l ₃ cos α ... (9) l ₃ sin α = l ₁ sin θ + l ₂ sin2 θ ... (10) Then, θ is calculated, and this is substituted into equation (9) to obtain y max and y
Find min. Next, find l ₂ so that y max −y min = 2P.

Although the planetary gear mechanism having the fixed gear 76 and the rotary gear 70 is shown in the above embodiment, any other planetary gear mechanism having three or more upper and lower dead centers can be applied.
Further, if the drive mechanism including the planetary gear mechanism and the crank arm mechanism is used as the drive mechanism of the monitor TV 14, the exposure can be performed over three rows to the left and right of the film 26.

Further, in the case of performing divided photographing over four or more steps in the vertical direction, a drive mechanism having four or more dead points in the vertical direction may be used.

The film 26 in the above embodiment may be directly inserted into the cassette holding means 22 without using the cassette 24.

In FIGS. 4B and 4D in the above embodiment, when the shaft 72 rotates clockwise about 95 degrees from the state shown in FIGS. 4A and 4C, the film 26 reaches the lowest position. As described above, this rotation angle can vary depending on the length of each arm, the diameter of the gear, and the like. In the above embodiment, the rotary arm 64,
Vertical drive force is applied to the cassette holding means 22 via the connecting arm 60.
However, if the connecting arm 60 is omitted and the pin 62A is attached so as to be relatively movable only in the horizontal direction of the cassette holding means 22, the bottom dead center of the trochoid locus 86 coincides with the lowest position of the cassette holding means 22. Can be made.

〔The invention's effect〕

As described above, the present invention is a divided photographic device for exposing an image to a plurality of locations on a photosensitive material, wherein the photosensitive material holding means and an output end fixed to a rotary gear that rotates around a fixed gear. Has a planetary gear mechanism for moving the holding means between three or more upper and lower dead centers, and a drive means for driving the planetary gear mechanism.
Even when there are three or more stop positions for the divided photographing, it is possible to accurately maintain these stop positions.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an image pickup apparatus showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG. 1 showing a monitor television driving portion, and FIG. 3 is a main vertical drive mechanism of a cassette. 4A to 4D are operation explanatory views showing the cassette driving unit. 10 …… Split photo shooting device, 14 …… Monitor TV, 22 …… Cassette holding means, 24 …… Cassette, 26 …… Film, 53 …… Drive mechanism, 70 …… Rotating gear, 76 …… Fixed gear.

Claims (2)

[Claims] 1. A divided photographic device for exposing an image to a plurality of locations on a photosensitive material, comprising: means for holding the photosensitive material,
An output end fixed to a rotating gear that rotates around a fixed gear includes a planetary gear mechanism that moves the holding means between three or more top and bottom dead centers, and a driving means that drives the planetary gear mechanism. A divided photo-taking device. 2. A rotating arm, one end of which is fixed to the rotary gear, and a connecting arm which is pivotally connected to the other end of the rotating arm and the holding means.
The divided photography apparatus according to claim 1, further comprising: