JP3641879B2 - Rack for photosensitive material conveyance - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rack for transporting a photosensitive material to be developed in an automatic developing apparatus.
[0002]
[Prior art]
As shown in FIG. 2 , a plurality of processing solution tanks T _{1 to} T _n are arranged in one direction, and various kinds of developing solution, bleach solution, fixing solution, stabilization solution, etc. are stored in the processing solution tanks T _{1 to} T _n . the developing solution was charged in an automatic developing apparatus for developing process by immersing the light-sensitive material a in order in the processing liquid of the processing liquid tank T ₁ to T _n are each processing solution tank T ₁ to the T _n A rack 20 is inserted, and the photosensitive material A is transferred in the rack 20.
[0003]
As the rack of the photosensitive material conveyance, that shown in FIG. 3 (I) has been known. This rack is provided with a slit-like downward transfer path 22 and a slit-like upward transfer path 23 inside and behind the rack body 21, and the above-mentioned downwards by a plurality of feed rollers 24 provided in the rack body 21. The photosensitive material A transferred along the transfer path 22 is rotated 180 ° in the direction of transfer by a turn roller 25 provided at a lower portion in the rack body 21 and a reversing belt 26 partially pressed against the lower outer periphery of the turn roller. The direction is changed so as to be transferred along the upward transfer path 23.
[0004]
Here, the turn roller 25 is driven in the direction of the arrow in the figure, while the reverse belt 26 is driven in the direction of the arrow at the same speed as the peripheral speed of the turn roller 25.
[0005]
Further, the reversing belt 26 has a width dimension that allows close contact over the entire axial direction of the turn roller 25, is thin, and is formed of a rubber-based material such as silicone and has flexibility.
[0006]
In the rack, the photosensitive material A is pressed against the outer periphery of the turn roller 25 by the reversing belt 26, and the transport direction of the photosensitive material A is changed while being sandwiched between the turn roller 25 and the reversing belt 26. It has a feature that the material A is hardly damaged.
[0007]
[Problems to be solved by the invention]
Incidentally, in the conventional rack, turn roller 25 with a strong light-sensitive material A chewy between the contact portion between the inversion belt 26, for example, photographic paper comes fed, as shown in Figure 3 (II), inverting the belt 26 is deformed, and a liquid pool 27 is formed on the front side of the photosensitive material A, and the processing liquid stored in the liquid pool 27 is transported along with the photosensitive material A in the circumferential direction of the turn roller 25 and is developed at the front side portion of the photosensitive material A. There was a problem that the stagnation occurred and uneven development occurred.
[0008]
SUMMARY OF THE INVENTION An object of the present invention is to provide a rack for transporting a photosensitive material capable of preventing the progress of partial development of the photosensitive material.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, in the present invention, a turn roller is provided at the lower part in the rack body in which two transfer paths extending in the vertical direction are provided at the front and rear, and a flexible reversing belt is provided at the lower outer periphery of the turn roller. A photosensitive material transport rack in which a part of the photosensitive drum is pressed and the direction of transfer of the photosensitive material conveyed downward from the upper portion of the rack body toward the turn roller is changed between the turn roller and the reverse belt. A configuration is adopted in which a plurality of pressing rollers for pressing a part of the reversing belt against the outer periphery of the turn roller are provided around the lower outer periphery of the turn roller.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below with reference to FIG. As shown in FIG. 1 , the rack body 1 has a downward transfer path 2 and an upward transfer path 3 in the same manner as the rack of FIG. 3 described above, and the photosensitive material A is contained in the rack body 1. It is transferred along the transfer paths 2 and 3 by the rotation of the feed roller 4 incorporated in the.
[0011]
Here, a plurality of feed rollers 4 are provided in the vertical direction as in the rack shown in FIG. 3 , and can convey a continuous photosensitive material or a photosensitive material cut into a predetermined size.
[0012]
A turn roller 5 is provided in the lower part of the rack body 1, and a part of the reverse belt 6 is in contact with the lower part of the outer periphery of the turn roller 5. The turn roller 5 is rotationally driven in the direction of the arrow in the figure. On the other hand, the reversing belt 6 is engaged with a plurality of rollers 7, 8, and 9 and is moved in the direction of the arrow by one rotational drive of the roller.
[0013]
The photosensitive material A transferred downward along the downward transfer path 2 is fed between the contact portions of the turn roller 5 and the reverse belt 6, and the rotation of the turn roller 5 and the movement of the reverse belt 6 cause the turn roller 5 to move. It is conveyed in the circumferential direction and the transfer direction is changed by 180 °.
[0014]
The reversing belt 6 is thin and is formed of a rubber-based flexible material such as silicone. The reversing belt 6 is pressed against the outer periphery of the turn roller 5 by a plurality of press rollers 10 provided around the lower outer periphery of the turn roller 5.
[0015]
As described above, the reversible belt 6 having flexibility is pressed against the lower outer periphery of the turn roller 5 by the plurality of press rollers 10, so that the photosensitive material A having a strong waist is sent between the turn roller 5 and the reversal belt 6. However, the reversal belt 6 is not released from the outer periphery of the turn roller 5, and the photosensitive material A is exposed to the outer periphery of the turn roller 5 as shown in FIG. It is held in a state of being in close contact with.
[0016]
For this reason, no liquid pool is generated on the front side of the photosensitive material A, and it is possible to prevent the development of the developing material from occurring at the front end portion of the photosensitive material A.
[0017]
【The invention's effect】
As described above, in this invention, it is possible to prevent partial development of the photosensitive material and to obtain a development-processed product having stable quality.
[Brief description of the drawings]
1 is a cross-sectional view showing an embodiment of the present invention, and FIG. 1 is an enlarged cross-sectional view showing a part of (I). FIG. 2 is a schematic view of an automatic developing apparatus. (I) is a sectional view showing a conventional rack, (II) is an enlarged sectional view of a part of (I)
1 Rack body 5 Turn roller 6 Reversing belt 10 Presser roller

Claims (1)

  A turn roller is provided at the lower part of the rack body where two transfer paths extending in the vertical direction are provided at the front and rear, and a part of the flexible reversing belt is pressed against the lower part of the outer periphery of the turn roller. In the photosensitive material transport rack in which the transfer direction of the photosensitive material transported downward toward the head is changed between the turn roller and the reversal belt, a part of the reversal belt is provided around the lower outer periphery of the turn roller. 2. A rack for conveying a photosensitive material, comprising a plurality of pressing rollers pressed against the outer periphery of a turn roller.

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