JPH0566644U - Roll-shaped long photosensitive material feeding device - Google Patents

Abstract

(57) [Abstract] [Purpose] In a processing device such as a photoprinting device that handles a roll-shaped long sensitive material, the sensitive material can be directly pulled out from a magazine without providing an accumulator, and The object is to make the processing apparatus compact, minimize the installation space, and increase the degree of freedom in the layout of such processing equipment for minilabs installed in DP stores and the like. [Structure] A long photosensitive material is attached to a core 12 which is loosely fitted to a shaft protruding from a central inner wall of a magazine for storing the photosensitive material in a light-tight state.
Wrap it in a roll shape with the width of 13a being cut and aligned,
The photosensitive material 13 has the flat plate-shaped pressing members 6 and 6a that come into contact with the end surface of the cylindrical body generated by the winding and the elastic body 5.
a is a structure in which the photosensitive material 13a is pressed in the winding axis direction, and the photosensitive material 13a is unwound in the pressed state.
13a feeder.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a photosensitive material feeding means in a photosensitive material (hereinafter sometimes simply referred to as photosensitive material) processing apparatus.

[0002]

[Prior Art]

 Conventionally, in a photographic printing apparatus, as shown in a schematic side view of FIG. 5, a long color photographic printing paper is loaded as a roll-shaped photosensitive material 13a, and a negative master is sequentially fed out at a position 30 where projection exposure is performed. After exposure, it is developed and can be collected. In that case, if the sensitive material is sent out intermittently directly from the box body (hereinafter referred to as magazine 10), a considerable amount of acceleration is generated for each screen, so if the drawing speed is high, the material is rolled from the sensitive material roll. When the slack is released, the slack is repeated and the slack is repeated, and the slack is often folded and folded in the magazine 10, and the sensitive surface is often damaged.

In order to solve this, the roll-shaped long photosensitive material 13a is fed from the magazine 10 at all times by the roller pair 22 driven at a low constant speed, and the accumulator 25 is provided between the roller and the exposure position. Then, the photosensitive material 13a stored in the accumulator 25 is conveyed to the exposure position by the intermittent drive roller pair 23, and the behavior difference between the constant speed conveyance and the intermittent conveyance is determined by the length of the photosensitive material in the accumulator 25. Absorb by increasing or decreasing.

[0004]

[Problems to be solved by the device]

 However, doing so makes the device complicated and large, increases the installation space, and is troublesome to handle. Especially in the minilab system, such a state is completely unfavorable.

The present invention solves such a problem, and the accumulator 25 as described above is unnecessary, and the sensitive material is directly accelerated from the magazine, and even if it is pulled out, the sensitive material is not damaged in the magazine and is compact. It is an object of the present invention to provide a roll-shaped long photosensitive material feeding device which can be safely handled in a room.

[0006]

[Means for Solving the Problems]

 The purpose is to roll a long photosensitive material into a roll with the width of the long photosensitive material being cut and aligned uniformly on a core that loosely fits on a shaft protruding from the center inner wall of a magazine that stores the photosensitive material in a light-tight state. A roll having a configuration in which the photosensitive material is pressed in the winding axis direction by using a flat plate-shaped pressing member that comes into contact with the end surface of the cylindrical body generated by the rotation and the elastic body, and the photosensitive material is unwound in the pressed state. This is achieved by a feeding device for a strip-shaped photosensitive material.

[0007]

【Example】

 1 is a sectional view of the magazine of FIG. 1, a side view showing a driving operation of pulling out a sensitive material from the magazine of FIG. 2, a required torque and a pulling acceleration of a drive motor for driving the pulling out of the sensitive material from the magazine of FIG. 4 and a graph showing the relationship between the drawing acceleration and the resistance torque of the photosensitive material for the occurrence of slack in FIG.

A roll-shaped long sensitive material 13a is wound around a core 12 to form a scroll having an outer diameter D _P , and the core has a spring 5 as an elastic member on a loading shaft 3 planted in a main body 11 of a magazine 10. A lid 11a fitted through the washer 5a and the flat plate-shaped pressing member 6 and further fitted with the flat plate-shaped pressing member 6a is covered and locked.

The leading portion of the roll-shaped long photosensitive material 13a thus loaded in the photosensitive material processing machine such as the exposure printing machine is driven by the delivery roller pair 22 and intermittently moves to the exposure position 30. It is designed to be transported.

The drive roller 22A of the delivery roller pair 22 is concentrically fixed with a wheel 22B having a tooth number Z _R. A motor 22C is provided separately, and a wheel 22D having a number of teeth Z _M is fixed to the rotary shaft of the motor 22C. A chain or timing belt is hung on the wheels 22A and 22B.

The photosensitive material 13a is sent out by a predetermined size each time one screen is exposed by the delivery roller pair 22. However, if the photosensitive material 13a is always accelerated to a certain acceleration or less, the photosensitive material 13a is placed in the magazine 10. It does not fold. However, because the acceleration is kept too low, it is not efficient and loses its value as a laboratory production machine. As shown in Fig. 1, the present invention uses a flat plate on the side end of the roll-shaped long sensitive material in order to keep the speed lower than that of the conventional accumulator and to maintain high efficiency operation regardless of the compact configuration. -Shaped pressing members 6 and 6a are brought into contact with each other from both sides to actuate the spring 5, thereby applying a load torque Tff due to friction on the side end surface. Other load torques are load torque Tfs due to shaft suspension friction.

The load torque T _L is the sum of the above two torques.

Further, the roll-shaped long photosensitive material itself has an inertia moment, and the motor shaft equivalent inertia moment J _L is calculated from the tooth number ratio to further determine the motor shaft acceleration torque Ta.

Then, the required torque T _{M of the} motor is obtained from the load torque T _L and the motor shaft acceleration torque Ta.

Then, the present invention pays attention to Ta ≦ (Tfs + Tff) = T _L as a condition in which the slack does not occur, and pays attention to the fact that the required motor torque T _M has only to be a necessary and sufficient amount. We also experimentally identified a stable long-form photosensitive material feeding device that does not occur.

The experimental results are summarized in the graphs of FIGS. 3 and 4, which will be described.

That is, in the graph of FIG. 4, the sensitive material used has a width of 152 mm and a length of 175 m, and the acceleration-torque curve of the motor shaft acceleration torque Ta is obtained linearly. In addition, the torque Tfs of the shaft suspension friction alone is 7.5 kgcm, and the load torque Tff generated by the side end face friction when 100 g of force is applied to the spring 5 is 10 kgcm. You can see that From this, it can be seen that if the motor shaft acceleration torque Ta is 1500 mm / sec ² or less, slack does not occur even if side end surface friction is not applied. However, we have to be very slow to send it out.

On the other hand, in the case where the load torque on the side end face is further applied, the motor shaft acceleration torque Ta may be 2000 mm / sec ² or less, so that the delivery can be stably carried out at a considerably high speed.

It can be seen from the graph of FIG. 3 that the required motor torque is 1.5 kg · cm and 1.4 kg · cm when a sensitive material having a width of 152 mm, a length of 175 m and a width of 203 mm and a length of 85 m is fed at an acceleration of 1500 mm / sec ^2. . It can also be seen that the required motor torque when sending these sensitive materials at 2000 mm / sec ² is 2.2 kg · cm. However, looking at the safety factor, it can be seen that if a motor capable of producing a torque of 3 kg · cm is used, it can be sufficiently applied to the above two types of sensitive materials.

In the above description, the pressure of the spring 5 is set to 100 g, but it can be increased to 500 g. In this case, the motor shaft acceleration torque Ta is further increased, so that even if high speed feeding is performed, There is no slack. And the motor torque that accompanies it can also be determined.

Further, in the present experimental example shown in FIG. 4, the roll-shaped sensitive material having a width of 152 mm and a length of 175 m was used as described above. On the other hand, another experiment was conducted, and in this case, the spring pressing force was set to an appropriate pressure of about 500 g or less to send out with the same acceleration as the above-mentioned sensitive material, and the sensitive material could be sent and conveyed without folding. Confirmed to be done.

As a result, even if a roll-shaped long sensitive material having a width of about 203 mm or less and a length of 175 m or less is directly drawn out from the magazine at high speed and sent to the exposure unit, the sensitive material is not folded and overlapped in the magazine. It became possible to respond by selecting the required motor torque.

[0023]

[Effect of the device]

 With the present invention, it is possible to directly pull out the photosensitive material directly to the exposure section without causing the photosensitive material to roll up in the magazine, corresponding to various lengths of roll-shaped photosensitive material. Since it has become possible, the accumulators that have been used up to now are no longer needed, and processing machines such as exposure printers and developing machines can be made compact and compact, and equipment for minilabs that is installed in a narrow DP store is required. The phenomenon that squeezes is eliminated.

[Brief description of drawings]

FIG. 1 is a sectional view of a magazine.

FIG. 2 is a side view showing a drive for pulling out a photosensitive material from a magazine.

FIG. 3 is a graph showing the relationship between the required torque of the drive motor and the acceleration of drawing the sensitive material.

FIG. 4 is a graph showing the relationship between the pull-out acceleration of the sensitive material and the pull-out resistance torque of the sensitive material.

FIG. 5 is a side view in which a conventional accumulator is provided in a photosensitive material pull-out portion from a magazine.

[Explanation of symbols]

 3 Loading Shaft 5 Spring 6 Flat Plate Pressing Member 6a Flat Plate Pressing Member 10 Magazine 11 Magazine Body 11a Lid 12 Core 13a Rolled Long Sensitive Material 22 Feeding Roller Pair

Claims (1)

[Scope of utility model registration request] 1. A long photosensitive material is wound in a roll shape in a state in which the length of the long photosensitive material is cut and aligned uniformly on a core which is loosely fitted to a shaft projecting from a central inner wall of a box for accommodating the photosensitive material in a light-tight state, The photosensitive material is pressed in the winding axis direction by a flat plate-shaped pressing member that comes into contact with the end surface of the tubular body generated by the winding and an elastic body, and the photosensitive material is unwound in the pressed state. Roll-shaped long photosensitive material feeding device.