JPH0710357Y2 - Photo development equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a photographic developing device for processing a photosensitive material conveyed into a processing tank.

[Prior Art] The processing liquid supplied into the processing tank evaporates from the liquid surface, the liquid surface is oxidized by air, and the temperature of the processing liquid decreases. In order to prevent these, it is conceivable to provide a lid on the treatment tank to cover the surface of the treatment liquid.

However, if the liquid surface is completely covered, the photosensitive material cannot be transported into the processing tank. Therefore, when the photosensitive material is transported into the processing tank, the lid must be removed each time it is transported, which complicates this work.

It is also conceivable to provide an opening in a part of the lid and convey the photosensitive material into the processing tank through this opening. However, in this case, a part of the lid is always open, so that there is no lid. However, evaporation of the processing liquid, air oxidation, and temperature decrease will occur.

[Problems to be Solved by the Invention] In consideration of the above facts, in the present invention, photographic development capable of preventing evaporation of a processing solution for processing a light-sensitive material, air oxidation, or temperature decrease without obstructing conveyance of the light-sensitive material. The purpose is to obtain a device.

[Means for Solving the Problems] In order to solve the above problems, the present invention relates to a photographic developing device for carrying out development processing by carrying a photosensitive material by a carrying roller in a processing tank filled with a processing solution, A cover member which is provided in a state of contacting or extremely close to the liquid surface of the processing liquid at a position other than the transport path of the photosensitive material so as to cover the liquid surface, and which always shields the liquid surface directly from the outside air; Is provided so as to be movable between a state in which the surface of the processing liquid is covered and a state in which the transportation path is opened, and corresponds to the transportation path in a state where the surface of the processing liquid is covered. An opening / closing member that shuts off the liquid surface from the outside air, a spring that constantly biases the opening / closing member to a state of covering the liquid surface of the processing liquid, and a clutch that can transmit a driving force, The driving force is transmitted through the clutch. And a drive means for moving the opening / closing member against the biasing force of the spring to open the transport path, and a control means for driving the drive means during transport of the photosensitive material. There is.

[Operation] According to the present invention, when the photosensitive material is being conveyed, the control means drives the driving means to open the opening / closing member. This allows the photosensitive material to be transported into the processing liquid. In the non-conveying state of the photosensitive material, the driving of the driving means by the control means is stopped, and the opening / closing member is closed by the biasing force of the spring. As a result, the surface of the processing liquid in the processing tank can be covered, so that evaporation of the processing liquid, air oxidation, and temperature decrease can be prevented.

[Embodiment of the Invention] First Embodiment FIGS. 1 and 3 show a developing tank 12 of a photographic developing apparatus according to the present invention. FIG. 1 is a sectional view taken along line I-I in FIG.

The inside of the developing tank 12 is filled with the developer 14, and the developer 14
Rack 16 is placed inside.

The rack 16 is provided with a pair of side plates 18 and 20 as shown in FIG. 2, and stays 22 are arranged at four corners between the side plates 18 and 20. The side plates 18 and 20 are supported in parallel with each other by screwing bolts (not shown) from the outside of the side plates 18 and 20 to both ends of these stays 22.

A large-diameter roller 24 is stretched between the side plates 18 and 20 above the side plates 18 and 20 in the height direction. Below the large-diameter roller 24, a large-diameter roller 26 having substantially the same diameter as the large-diameter roller 24 is provided on the side plates 18, 20.
Have been hung over between. Below the large-diameter roller 26, a large-diameter roller 28 having a larger diameter than the large-diameter rollers 24, 26 is provided on the side plate 1.
It has been passed over between 8 and 20.

Small-diameter rollers 30 and 32 are disposed on both sides of the large-diameter roller 24 so as to abut on both sides, and are stretched between the side plates 18 and 20. Large diameter roller 26
Similarly to the large-diameter roller 24, the small-diameter rollers 34, 36 are abutted and laid between the side plates 18, 20.

Small-diameter rollers 38, 40 are arranged on both sides of the large-diameter roller 28 along the widthwise direction of the side plates 18, 20, so that the large-diameter roller 2
A small-diameter roller 42 is disposed below the roller 8, and they are suspended between the side plates 18 and 20.

Therefore, as shown by the two-dot chain line in FIGS. 1 and 3, the photosensitive material 46 guided by the pair of guide rollers 44 and the guide plate 43 arranged above the developing tank 12 is the large diameter roller 24 and the small diameter roller. 32, conveyed by being sandwiched between the large diameter roller 26 and the small diameter roller 36, and inverted and raised while being sandwiched between the large diameter roller 28 and the small diameter rollers 38, 40, 42, and the large diameter roller 26 and the small diameter roller 3
4. The large-diameter roller 24 and the small-diameter roller 30 send out the developing tank 12 and carry it to the next step.

These large diameter rollers 24, 26, 28, small diameter rollers 30, 32, 34, 36,
38, 40, 42 have rotary shafts 48 extending from both ends thereof, and these rotary shafts 48 are supported by bearings 47 attached to the side plates 18, 20. One of these rotary shafts 48 penetrates the side plate 18 and extends outward from between the side plates 18 and 20, and a gear (not shown) is attached to the tip end thereof to transmit the driving force of a driving means (not shown). It is like this. With this driving force, large diameter rollers 24, 26, 28, small diameter rollers 30, 32, 34, 36, 38, 40, 42
Is designed to rotate.

Between the upper portions of the side plates 18 and 20 around which these rollers are stretched and the pair of guide rollers 44, the processing tank liquid surface lid 10 is arranged.

The processing tank liquid surface lid 10 is provided with a pair of opening / closing members 48A, 48B and opening / closing members 52A, 52B. These opening and closing members 4
8A, 48B and the opening / closing members 52A, 52B are arranged such that the longitudinal directions thereof are parallel to each other along the width direction of the photosensitive material 46, and the rotation shafts extending from both ends are rotatably supported by the tank body 12A of the developing tank 12. Has been done. The rotating shafts of the opening / closing members 48A, 48B, 52A, 52B are eccentric.

A cover member 50A is provided between the opening / closing member 48A and the tank body 12A. One end of the cover member 50A is attached to the tank body 12A, and the other end is in contact with the outer peripheral surface of the opening / closing member 48A. A cover member 50B is also attached to the tank body 12A between the opening / closing member 48B and the opening / closing member 52A. Further, the cover member 50C is also provided between the opening / closing member 52B and the tank body 12A.
It is attached to 2A.

The opening / closing member 48A has the other ends of the pair of tension coil springs 72 fixed to the cover member 50A.
The opening / closing member 48A is biased so as to rotate in a direction in which the opening / closing member 48A contacts the opening / closing member 48B.

Further, a pair of tension coil springs 74 is arranged between the opening / closing member 48B and the opening / closing member 52A, and the opening / closing member 48B is rotated by the biasing force of the tension coil springs 74 so as to rotate in the direction of contacting the opening / closing member 48A. The opening / closing member 52A is biased so as to rotate in a direction in which the opening / closing member 52B contacts the opening / closing member 52B.

A tension coil spring 76 is arranged between the opening / closing member 52B and the cover member 50C, and the opening / closing member 52B is biased by the biasing force of the tension coil spring 76 so as to rotate in the direction of contacting the opening / closing member 52A. ing.

Therefore, the opening / closing member 48A and the opening / closing member 48B and the opening / closing member 52A and the opening / closing member 52B are brought into close contact with each other by the elastic force to cover the liquid surface of the developer 14 in the developing tank 12.

Further, the shafts of the opening / closing members 48A, 48B are extended to penetrate the tank body 12A, and spur gears 54, 56 are attached to the tips thereof. These spur gears 54 and 56 mesh with each other. Further, a sprocket 58 for driving force transmission is provided at the tip further than the spur gear 54.
Is fixed, and the motor is located below the developing tank 12.
The driving force of 60 is transmitted by the endless belt 61 and the spur gear 54
The opening / closing member 48A rotates against the biasing force of the tension coil spring 72. This rotational driving force is also transmitted to the opening / closing member 48B via the spur gear 56, so that the opening / closing members 48A and 48B rotate in the directions in which they are separated from each other. A gear 65 is fixed to the drive shaft of the motor 60 via a clutch 63. This clutch 63 is a clutch that can rotate only in one direction.
It is designed to rotate only in one direction by the driving force of.

When the driving of the motor 60 is stopped, the opening / closing members 52A and 52B are rotated by the urging forces of the tension coil springs 72 and 74 in the directions in which they come into contact with each other, and are brought into a closed state. At this time, since the drive shaft of the motor 60 is provided with the clutch 63 that can rotate only in one direction, the drive shaft of the motor 60 does not reverse.

As the clutch 63, a conical friction clutch or an electromagnetic clutch publicly used in each field can be appropriately used, and when the motor 60 is driven, the clutch 63 operates to transmit the driving force of the motor 60 to the gear 65. However, when the motor 60 is stopped, the clutch 63 is also stopped so that the transmission of the rotational force from the gear 65 to the motor 60 can be cut off.

The motor 60 is connected to the control unit 62. Also the control unit
A detector 70 is connected to 62. The detector 70 is arranged between the guide roller 44 and the opening / closing member 48A.

Gears 66, 68 are also attached to the tip ends of the extended shafts of the opening / closing members 52A, 52B, like the opening / closing members 48A, 48B.
Mesh with each other. A driving force transmission gear 64 is attached to the tip of the gear 66 further, and an endless belt is wound around the gear 59 provided on the rotating shaft of the opening / closing member 48A. As a result, the driving force of the motor 60 is transmitted to the opening / closing members 52A and 52B via the gears 66 and 68.

Therefore, the opening / closing members 52A and 52B are rotated in the opposite directions against each other by the driving force of the motor 60 against the biasing forces of the tension coil springs 74 and 76, and the outer peripheral surfaces are rotated in the directions away from each other. When the driving of the motor 60 is stopped, the opening / closing members 52A, 52B are biased by the tension coil springs 74, 76.
Are designed to rotate in the direction in which they touch each other.

Next, the operation of this embodiment will be described.

When the photosensitive material 46 is not conveyed into the developing tank 12, the open / close members 48A, 48B and the open / close members 52A, 52B are in a closed state in which the outer peripheral surfaces are biased by the biasing forces of the tension coil springs 72, 74, 76, respectively. (See FIG. 1), the liquid surface of the developer 14 is covered with the cover member 50A and the opening / closing members 48A, 48B, 52A and 52B. This prevents evaporation of developer 14 from the liquid surface, air oxidation, and temperature drop.

When the photosensitive material 46 is conveyed into the developing tank 12, the presence of the photosensitive material 46 nipped and guided by the guide roller 44 is detected by the detector 70. Based on this detection, the control unit 62
The opening / closing members 48A, 48B and the opening / closing members 52A, 52B are rotated through spur gears 54, 56 in the directions in which they are separated from each other against the biasing forces of the tension coil springs 72 to 76, and the liquid level for the processing tank is activated. The lid 10 is opened. This opens and closes the photosensitive material 46
It can be passed through the space between 48A and the opening / closing member 48B into the developing tank 12. The photosensitive material 46 conveyed into the developing tank 12 is nipped and conveyed between the large-diameter roller 24 and the small-diameter roller 32, the large-diameter roller 26 and the small-diameter roller 36, and is sent to the lower portion of the developing tank 12, and the large-diameter roller 28 and the small-diameter roller. The rollers 40, 42, 38 are reversed and rise, and the large diameter roller 26 and the small diameter roller 34, the large diameter roller 24 and the small diameter roller 30.
Is sent to the next process by passing between the opening / closing members 52A and 52B.

When the photosensitive material 46 is no longer detected after the photosensitive material 46 has passed, the controller 62 stops driving the motor 60. This allows the opening / closing member 4 to be pressed by the urging force of the tension coil springs 72, 74, 76.
The 8A, 48B and the opening / closing members 52A, 52B rotate so as to be in contact with each other, and are in a closed state. In this state (state in which the photosensitive material is not conveyed), the developing tank 12 is closed to prevent evaporation of the developing solution, air oxidation, and temperature drop.

Second Embodiment FIGS. 4 to 6 show a developing tank 82 to which the processing tank liquid surface lid 80 of the second embodiment is applied. The rack in the developing tank 82 is the same as that in the first embodiment, and therefore the same reference numerals are given in FIG. 4 and the description thereof is omitted.

As shown in FIGS. 4 to 6, cover members 84A and 84B are arranged above the developing tank 82. The cover member 84A and the cover member 84B are inserted and fixed in the groove 82B of the developing tank main body 82A, and the gap between them is opened to serve as a passage portion for the photosensitive material 46.

A pair of opening / closing members 86A, 8A are provided on top of the cover members 84A, 84B.
6B is arranged. A rack 88 is attached to one side portion of the opening / closing members 86A and 86B in the width direction of the photosensitive material. A pinion 90 meshes with this rack 88. The pinion 90 is fixed to one end of the shaft 92. The shaft 92 is rotatably supported at its middle portion by a bearing 93 fixed to the developing tank main body 82A. The other end of the shaft 92 penetrates the developing tank main body 82A and projects outward, and a spur gear 94 is attached to the tip end portion. The driving force of the motor 60 is transmitted to the spur gear 94 as in the first embodiment.

Further, the opening / closing member 86B is a spur gear pivotally supported by the developing tank main body 82A.
The driving force of the motor 60 is transmitted to the gear 97 via 96 and the spur gear 98 to be driven.

These opening / closing members 86A and 86B are biased so that their ends are in contact with each other by the biasing force of the compression coil spring 100 arranged between the opening / closing members 86A and 86B. The opening / closing members 86A and 86B are configured such that the guides 102 provided on the cover members 84A and 84B are inserted into the grooves 104 and guided and moved.

Therefore, when the motor 60 is stopped, the opening / closing members 86A and 86B are
Is an urging force of the compression coil spring 100 to close the opening on the liquid surface of the developer 14, and when the motor 60 operates, the opening / closing members 86A and 86B respectively resist the urging force of the compression coil spring 100. And move in a direction away from each other. As a result, the opening on the liquid surface of the developing solution is opened.

Next, the operation of this embodiment will be described.

In a state where the photosensitive material 46 is not conveyed to the developing tank body, the opening / closing members 86A and 86B are biased by the biasing force of the compression coil spring 100, and the ends are in contact with each other. In this state, the developer
The liquid surface of 14 is covered with the cover members 84A, 84B and the opening / closing members 86A, 86B, and evaporation of the developer 14 from the liquid surface, air oxidation, and temperature decrease are prevented.

When the photosensitive material 46 is conveyed into the developing tank 82, the presence of the photosensitive material 46 nipped and guided by the guide roller 44 is detected by the detector 70 (see FIG. 4). Based on this detection, the control unit 62 operates the motor 60 to move the opening / closing members 86A and 86B in the direction in which they are separated from each other against the biasing force of the compression coil spring 100. In this state, the photosensitive material 46 is conveyed between the cover members 84A and 84B into the developing tank 82. The photosensitive material conveyed into the developing tank 82 has large-diameter rollers 24, 26, 28 and small-diameter rollers 30, 32, 34, 36, 38, 4 as in the first embodiment.
The sheet is guided by being sandwiched between 0 and 42, and again sent through the space between the cover members 84A and 84B to the next step.

After passing the photosensitive material 46, the operation of the motor 60 is stopped, and the opening / closing members 86A and 86B are moved in the direction in which they are in contact with each other by the urging force of the compression coil spring 100 to be in the closed state.

The driving means for driving the opening / closing members 48A, 48B, 52A, 52B, 86A, 86B to open / close may be a driving means for driving the rollers for conveying the photosensitive material.

[Advantages of the Invention] As described above, the present invention is a photographic developing device for carrying out development processing by carrying a photosensitive material by a carrying roller in a processing tank filled with a processing liquid, wherein A cover member that is provided in a state of contacting or extremely close to the liquid surface of the processing liquid to cover the liquid surface, and that always shields the liquid surface directly from the outside air; and the processing liquid on the conveyance path of the photosensitive material. Is provided so as to be movable between the state of covering the liquid surface and the state of opening the transfer passage, and in the state of covering the liquid surface of the processing liquid, the liquid surface corresponding to the transfer passage is exposed to the outside air. An opening / closing member for shutting off, a spring for constantly urging the opening / closing member to cover the liquid surface of the processing liquid, and a clutch capable of transmitting a driving force, and a driving force of a driving source via the clutch. To transmit the opening / closing member to the front. The photosensitive material processing tank is provided with a driving means for moving the conveying path to an opened state against the biasing force of the spring, and a control means for driving the driving means at the time of conveying the photosensitive material. In addition to being capable of being transported inward, the surface of the processing liquid can be covered in the non-transporting state of the photosensitive material, and an excellent effect that evaporation of the processing liquid, air oxidation, and temperature decrease can be prevented can be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view of the developing tank of the first embodiment applied to the photographic developing apparatus according to the present invention, taken along line I--I in FIG. 3, and FIG. 2 is an exploded perspective view showing a rack. Figure 3 is the first
FIG. 4 is a perspective view showing the developing tank of the embodiment, FIG. 4 is a sectional view showing the second embodiment corresponding to FIG. 1, FIG. 5 is a perspective view showing the developing tank of the second embodiment, and FIG. Fig. 4 VI-V showing two examples
It is sectional drawing cut | disconnected along the I line. 10 …… Liquid cover for processing tank, 12 …… Development tank, 14 …… Developer,
46 ... Photosensitive material, 48 ... Rotating shaft, 50A, 50B, 50C ... Cover member, 52A, 52B ... Opening / closing member, 54, 56 ... Spur gear, 58 ...
… Drive force transmission sprocket, 60 …… Motor, 62 …… Control part, 64 …… Drive force transmission gear, 66, 68 …… Gear, 80 ……
Liquid level lid for processing tank, 82 ... Development tank, 84A, 84B ... Cover member, 86A, 86B ... Opening / closing member, 90 ... Pinion, 92 ...
axis.

 ─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-58-86543 (JP, A) JP-B-55-34936 (JP, B2) JP-B-58-4097 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. A photographic developing apparatus for carrying out a developing process by carrying a photosensitive material by a carrying roller in a processing tank filled with the processing solution, the liquid level of the processing solution being provided on a portion other than a carrying path of the photosensitive material. A cover member which is provided in contact with or very close to the liquid surface to cover the liquid surface and always shields the liquid surface directly from the outside air; and a state in which the liquid surface of the processing liquid is covered on the conveyance path of the photosensitive material. And an opening / closing member that is provided so as to be movable between a state in which the transport path is opened and that shuts off the outside of the liquid surface corresponding to the transport path in a state of covering the liquid surface of the processing liquid; The member includes a spring for constantly urging the member to cover the surface of the treatment liquid, and a clutch capable of transmitting a driving force. The driving force of a driving source is transmitted through the clutch to open and close the opening / closing member. Against the biasing force of the spring A photographic developing device comprising: a driving unit that moves the conveyance path to an open state; and a control unit that drives the driving unit when the photosensitive material is conveyed.