JP2783353B2 - Photosensitive material transport device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic material transport apparatus (hereinafter referred to as a transport apparatus) in a photographic material processing apparatus (hereinafter referred to as a processing apparatus). More specifically, the present invention relates to a transport device that transports a photographic photosensitive material such as a photographic film (hereinafter, referred to as a film) while forming a loop portion by bending the photosensitive material.

[0002]

2. Description of the Related Art When a film is continuously processed such as development and printing, it is necessary to sequentially convey the film at a conveyance speed suitable for each step.

For example, in a developing process in a processing apparatus, a film is moved at a constant speed, and in a printing process, the film is moved.
Although the film is moved intermittently for each frame, it is necessary to correct the difference in the transport speed between the steps in order to transport the entire film smoothly.

Conventionally, in order to correct such a difference in the transport speed between the steps, a loop is forcibly formed in the film by a transport device attached between the steps, and the transport speed is increased and reduced by the expansion and contraction of the loop. A method of absorbing the difference has been performed.

As shown in FIG. 4, a conventional transport device having a loop forming mechanism includes front drive rollers 31a and 31b and rear drive rollers 32 provided along a transport direction A.
A loop guide 33 is provided on the lower surface of the film F in order to guide the film F (transfer the film) between a and 32b.

As shown in FIG. 5, the loop guide 33 has a plurality of rollers 36 arranged on the same plane between two arms 35, and a shaft 37 extends from one side of the arm 35. The shaft 37 is supported by a bracket 38. By rotating the shaft 37 in the B direction (or C direction) by a solenoid or the like, the arm 35 swings downward (or upward), and the direction of the group of rollers 36 can be changed to the horizontal direction and downward.

When a loop portion is formed on the film F using the transport device shown in FIG. 4, a front (downstream) drive roller
31a and 31b are stopped, and the rear (upstream) drive roller 32 is stopped.
a and 32b are driven to flex the film F. At the same time, the shaft 37 is rotated substantially 90 ° in the direction B, and the loop guide 33 is lowered.

At this time, the film F bends between the front drive rollers 31a and 31b and the rear drive rollers 32a and 32b, and the loop L is formed by its own weight. The formed loop portion L is housed in the loop tank 39.

Further, a film switching mechanism is provided inside the loop tank 39 in order to regulate the width of the film F so as not to be twisted in the loop tank 39.

As shown in FIG. 6, a screw is formed on the shafts 44, 45 and the surface of the film switching mechanism so that the pair of guide plates 42, 43 are parallel to each other inside the case 41. It is supported by the screw shaft 46.

When the type of the film to be conveyed is changed, a change in the size of the film (for example, from 110 to 135 or vice versa) is detected by a sensor (not shown), and the width switching motor 47 is driven. Then, the screw shaft 46 is rotated via the belt 48 and the pulley 49.
At this time, the one guide plate 42 is moved closer to or away from the other guide plate 43 so that the film F
Is adjusted.

[0012]

However, in order to form the loop portion L of the film F, the transport device has a movable loop guide 33 for changing the direction of a group of guide rollers 36 and a driving device for driving the loop guide 33. Requires a solenoid to perform the operation, the whole mechanism becomes complicated and large, and it is difficult to save space.

Further, when the loop portion L is formed, the deflection of the film F becomes large, and the films of the loop portion L rub against each other, causing a problem that the image portion of the film is damaged.

Further, the loop tank is fixed to the lower portion of the drive unit with screws or the like. However, since the loop tank is provided with a film switching mechanism, the loop tank becomes complicated and large, and the loop tank is formed. When detaching,
It is necessary to perform wiring work for electrical components such as the width switching motor 47 and the sensor constituting the film switching mechanism, and there is a problem that the detachment and attachment of the loop tank is difficult and maintenance is difficult.

The present invention has been made in order to solve such a problem, and provides a transport device which is simple and compact, can prevent rubbing of films at the time of forming a loop, and can easily attach and detach a loop tank. The purpose is to do.

[0016]

SUMMARY OF THE INVENTION A transport apparatus according to the present invention has a loop forming mechanism for bending a photographic material in a loop and a loop tank for accommodating the loop. Wherein the loop forming mechanism is provided separately from a loop guide capable of slidably holding both end portions of the photographic light-sensitive material along the traveling direction of the photographic light-sensitive material. It is characterized by comprising a pair of photographic photosensitive material conveying members to be driven, and a loop intrusion member provided between the photographic photosensitive material conveying members.

Preferably, the loop guide is configured to be able to swing between a position where the photographic photosensitive material is clamped and a position where the clamp is released in the loop forming direction.

Further, it is preferable that the loop invading member is configured to be able to move into the loop when the formation of the loop of the photosensitive material is detected in the loop tank.

Further, the loop tank has a gutter-shaped guide formed on its bottom surface such that the interval is increased upward from a bottom portion whose interval is smaller than the width of the photographic material. Is preferred.

[0020]

According to the present invention, the film to be conveyed is guided by a loop guide which slidably holds both side edges of the film. Therefore, a structure which does not particularly require a movable film switching mechanism and the like is simple and the structure is simple. And space saving is achieved.

The formation of the film loop is performed by releasing the holding of the film by the loop guide, stopping the conveyance of the front side of the pair of film conveyance members, and conveying the film only on the rear side. Then, when the film is bent in a loop shape in the loop tank, the rubbing of the films forming the loop is prevented by the intrusion of the loop intrusion member.

[0022]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a partially cutaway front view showing an embodiment of the transfer device of the present invention, FIG. 2 is a P view of the transfer device of FIG. 1 as viewed from an arrow, and FIG. 3 is an operation explanatory diagram of the transfer device of FIG.

As shown in FIGS. 1 and 2, the transport device includes a loop forming mechanism 1 for forming a loop portion on the film F and a loop forming mechanism 1 for accommodating a loop portion L of the film F provided at a lower portion thereof. It comprises a loop tank 2 and a loop detection sensor 3 provided between the loop forming mechanism 1 and the loop tank 2.

The loop forming mechanism 1 is configured as follows. That is, the two loop guides 5a, 5b are swingably provided at the lower part of the arm 4 extending vertically to the transport direction D of the film F on the loop tank 2 so as to be symmetrical with respect to the transport direction D. Are mounted, and first solenoids 6a and 6b are provided below the loop guides 5a and 5b. The arm 4 is provided with a fixed shaft 7 perpendicular to the transport direction D, and a bracket 8 is mounted on the fixed shaft 7 via a bearing 9 so as to be rotatable above the film F. The bracket 8 is provided with four loop rollers 10a, 10b, 10c, and 10d rotatably (these 8, 10, 10a, 10b, 10c, and 10d are loop invading members referred to in the claims). ). The bracket 8 and the bearing 9 rotate by receiving a driving force from the second solenoid 12 via a transmission belt 11. Furthermore, two drive rollers 1 for film transport, which are rotated and driven by a motor, etc.
3 and 14 are provided apart from each other in the transport direction D.
The drive rollers 13 and 14 have a right cylindrical shape and can transport the film F at a desired transport speed without slipping.

The loop rollers 10a, 10b, 10c, 10d
Is one that does not cause damage even when it comes into contact with the film F. For example, a roller whose surface is formed of Teflon is preferably used.

The loop tank 2 is made to have a width S of about 40 mm so that it can be sufficiently accommodated even if the film size is different, such as 110 or 135. The loop tank 2 is fixed to a lower portion of the loop forming mechanism 1 with a screw or the like.

Further, at the bottom of the loop tank 2, the screen portion f1 of the film F should not touch the bottom of the tank.
A gutter-shaped guide 15 is provided. Guide 15 is approximately 20mm
A pair of flanges 15b are provided on both end surfaces of a bottom plate 15a having a width of about 10 mm so as to increase the interval upward, and the loop tank 2 is arranged substantially parallel to the transport direction D.
It extends to the bottom of.

The loop detection sensor 3 includes two drive rollers
A sensor for detecting the presence or absence of the loop portion L in the section between 13 and 14, and detects the loop portion L when the lower end of the loop portion L extends downward and moves below the height of the loop detection sensor 3. Thus, the operation of the second solenoid 12 is controlled.

In the transport device constructed as described above, the guide pressers 17a, 17b attached to the tips of the plungers 16a, 16b of the first solenoids 6a, 6b lift the loop guides 5a, 5b, thereby causing the film F to move. Both ends are the lower surface of the arm 4 and the loop guides 5a, 5a
The film F is slidably supported between the claw portions 18a and 18b at the leading end of b, and the film F is guided along the transport direction D. The guide holders 17a and 17b are directly connected to the loop guides 5a and 5b.
The damper effect is obtained by interposing the caul plates 19a and 19b instead of lifting the b.

Next, a process of forming a loop portion L on the film F using the transport device of FIG. 1 will be described with reference to FIGS.
This will be described with reference to (a) and (b).

First, in the state of film transfer shown in FIG. 3A, both ends of the film F are connected to the loop guides 5a, 5a,
b, the film F is slidably supported, and the drive rollers 13, 14 are driven at the same rotational speed to move the film F in the transport direction D.
Along a substantially straight line. At this time, the loop rollers 10a, 10b, 10c, and 10d are waiting at a position above the film F and separated.

When the loop portion L is formed, first, the first
By turning off the solenoids 6a and 6b, the loop guides 5a and 5b are lowered. Next, the front drive roller 13 is stopped, and only the rear drive roller 14 is driven to form a loop portion L of the film F below the arm 4. The loop portion L is housed inside the loop tank 2 (see FIG. 3B). At this time, if the drive roller 14 on the rear side continues to be driven, the loop portion L increases downward, and finally, the lower end of the loop portion L passes below the position of the loop detection sensor 3. At this time, the loop detection sensor 3 detects the presence of the loop portion L, activates the second solenoid 12, and rotates the bracket 8 in the E direction. Thereby, the loop rollers 10a, 10b, 10c, 10d
Can be interposed in the loop portion L to prevent rubbing between the films F.

When the loop portion L is at the maximum, both end portions of the lower end of the film F are in line contact with the flange portion 15b of the guide 15, thereby preventing the screen portion f1 of the film F from contacting the bottom surface of the loop tank 2. , So as not to damage the screen section f1.

Thereafter, even if the two drive rollers 13 and 14 are driven to rotate at a predetermined transport speed, the difference in the transport speed of the film F can be absorbed by the loop portion L.

When returning to the state of film transfer shown in FIG. 3A again, the rear drive roller 14 is stopped,
By driving only the front drive roller 13, the loop portion L of the film F can be eliminated. When the lower end of the loop portion L is higher than the position of the loop detection sensor 3, the loop detection sensor 3 detects that the loop portion L has disappeared, operates the second solenoid 12, and moves the bracket 8 in the opposite direction. Then, the loop rollers 10a, 10b, 10c, and 10d are returned to the initial positions, and a series of operations is completed.

It should be noted that a 110-size film has a maximum length of 24
Because it does not reach the bottom of loop tank 2 for the top,
The guide 15 may not be provided.

[0037]

According to the present invention, the simplification and space saving of the transport device can be achieved, the rubbing of the screen portion between the films can be prevented, and the work of attaching and detaching the loop tank can be facilitated. Can be.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of a transport device of the present invention.

FIG. 2 is a P view of the transport device in FIG.

FIG. 3 is an operation explanatory view of the transfer device of FIG. 1;

FIG. 4 is a front view of a conventional transport device.

FIG. 5 is a perspective view of a loop guide in FIG.

FIG. 6 is a perspective view of a conventional film switching mechanism.

[Explanation of symbols]

 Reference Signs List 1 loop forming mechanism 2 loop tank 3 loop detection sensor 4 arm 5a, 5b loop guide 6a, 6b first solenoid 10a, 10b, 10c, 10d loop roller 12 second solenoid 13 drive roller 14 drive roller 15 guide 15a bottom plate 15b flange 18a, 18b Claw F Film L Loop

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-205142 (JP, A) JP-A-3-294853 (JP, A) JP-A-1-149050 (JP, A) 4944 (JP, U) Shokai 55-169532 (JP, U) Shokai 59-114560 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) G03D 3/00-17 / 00

Claims (4)

(57) [Claims] 1. A photographic light-sensitive material transporting device having a loop forming mechanism for bending a photographic light-sensitive material into a loop and a loop tank for accommodating the loop, wherein the loop forming mechanism comprises a photographic material. A loop guide capable of slidably holding both end portions of the photosensitive material, and a pair of independently driven photographic material transport members provided separately in the traveling direction of the photographic material. A photographic light-sensitive material conveying apparatus, comprising: a loop-entering member provided between the photographic light-sensitive material conveying members. 2. The photographic material according to claim 1, wherein said loop guide is swingable between a position for holding the photographic material and a position for releasing said nip in the loop forming direction. Transport device. 3. The photograph according to claim 1, wherein the in-loop intruding member is configured to move into the loop when the formation of a loop of the photographic light-sensitive material in the loop tank is detected. Photosensitive material transport device. 4. The loop tank has a gutter-shaped guide formed on its bottom surface such that the distance between the loop tank and the bottom is narrower than the width of the photographic material. Item 2. A photographic light-sensitive material conveying apparatus according to Item 1.