JPH0876261A - Drive force transmission mechanism of printer processor - Google Patents

Abstract

PURPOSE: To prevent the driving force of a driving source from being transmitted to the driving system of a drying processing part when the driving system of the processing part is reversely rotated. CONSTITUTION: When a motor is driven to rotate a driving gear 140 in the direction shown by arrow A, a moving gear 146 comes between the driving gear 140 and a large gear 150A constituting a transmitting gear 150 to mesh with them so as to transmit the driving force to the gear 150. Therefore, the driving force is transmitted to the gear 152 of the driving system and a skewer roller, etc., disposed in a carrying part 54 is normally rotated, then photographic paper is carried while it is dried. When the gear 140 is rotated in the direction opposite to the arrow A, a supporting plate 144 is separated from the gear 140 together with the gear 146 and the driving force is not transmitted to the gear 150.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving force transmission mechanism in a processing section drive system of a processing tank and a drying section drive system of a drying processing section provided in a printer processor.

[0002]

2. Description of the Related Art In a printer processor, in order to clean dirt on a roller and a guide plate arranged in a processing tank, washing water is sprayed from a nozzle provided on a side wall of a rack toward the roller and the guide plate, and then the roller is guided. The method of repeating the step of reversing for several times is adopted several times.

By the way, the driving force is transmitted to the rollers of the processing tank and the rollers of the drying processing section by one driving motor. Therefore, if the drive motor is rotated in the reverse direction and the rollers in the processing tank are reversed, the rollers in the drying processing section are also reversed.

However, since the drive system of the rollers of the drying processing section is generally connected by a chain, there is a risk of tooth skipping when reversed. Further, in the drying processing section in which the mesh belt is arranged, when it is reversed, it causes the mesh belt to meander.

[0005]

SUMMARY OF THE INVENTION In consideration of the above facts, an object of the present invention is to prevent the driving force of the driving source from being transmitted to the driving system of the drying processing unit when the driving system of the processing unit is reversed. And

[0006]

According to a first aspect of the present invention, there is provided a driving force transmitting mechanism for a printer processor, which is provided for a processing section driving system of a processing tank and a drying section driving system of a drying processing section provided in the printer processor. In a driving force transmission mechanism of a printer processor that transmits driving force by one driving source, between a transmission gear that constitutes the drying unit driving system and a driving gear that is driven by the driving source, depending on a rotation direction of the driving gear. It is characterized in that a moving gear that meshes with the transmission gear and the drive gear or that retracts from the drive gear is provided.

According to a second aspect of the present invention, there is provided a driving force transmitting mechanism for a printer processor, wherein the moving gear is pivotally supported by a supporting plate which is swingably supported.

[0008]

In the driving force transmission mechanism of the printer processor according to the first aspect, the processing unit drive system of the processing tank and the drying unit drive system of the drying processing unit transmit the driving force from one drive source. Has become.

A moving gear is provided between the transmission gear and the drive gear driven by the drive source, which constitutes the drying section drive system. This moving gear bites between the transmission gear and the driving gear when the driving gear is rotated in the normal direction, that is, when the rollers of the processing unit driving system are normally rotated, and the driving force is transmitted to the transmission gear. To do.

On the other hand, when the drive gear is rotated in the direction of reversing the rollers of the processing unit drive system, it runs away from the drive gear and runs idle. As a result, when the driving force of the driving source is not transmitted to the transmission gear and the rollers of the processing unit driving system are reversed, the driving system of the drying processing unit is stopped.

In the driving force transmitting mechanism of the printer processor according to the second aspect, the moving gear is pivotally supported by the supporting plate which is swingably supported. By adjusting the fulcrum of the support plate, the meshing state of the drive gear and the transmission gear with the moving gear can be easily adjusted.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 9 and 10 show the outline of a printer processor 10 in which a driving force transmission mechanism according to this embodiment is used. (Schematic Description of Printer Processor) The photo printing unit 12 constituting the printer unit of the printer processor 10 has a structure in which a paper magazine 14 in which photographic printing paper P is stored can be loaded. The photographic printing paper P sent out from the paper magazine 14 is cut into a desired length by the cutter 16, and then placed on the suction belt 18 and stopped to be conveyed on the optical axis S of the exposure light beam.

A large number of small holes are formed in the suction belt 18 over the entire area, and a suction force for sucking the printing paper P from the suction fan 22 is applied through the small holes formed on the upper surface of the duct 20. It is supposed to be done.

The casing 10 of the printer processor 10
On the upper surface of A, a light source box 26 in which a light source 24 is arranged
Is provided. The side wall of the light source box 26 is opened, and the diffusion box 28 is inserted into this opening.
A mirror and a diffusing plate are provided in the diffusing box 28 so that the light amount of the light source 24 is large at the exit and is flat.

At the bent portion of the diffusion box 28,
The light rays of the light source whose color tone is adjusted by the three sets of CC filters 30 arranged in the light source box 26 are bent from the horizontal direction to the vertical direction.

The light beam bent in the vertical direction passes through the negative film N set on the negative carrier 32 placed on the casing 10A and becomes an exposure light beam. The exposure light beam passes through the exposure lens unit 34 and forms an image of the negative film N on the photographic printing paper P arranged in the lower area.

Here, the photographic paper P on which the black shutter 35 has been opened and the image printing has been completed is guided by the guide roller 3
6 and the pressing roller 38, the conveyance path 40
And is conveyed to a processing tank 42 where each processing of development, bleach-fixing, and washing with water is performed.

Finally, the photographic printing paper P, which has been washed with water in the washing tank, is conveyed to the drying processing section 44 disposed above. The photographic printing paper P that has been subjected to the drying processing in the drying processing section 44 is switched to the conveyance path by the guide plate 134, and is discharged to the outside of the machine via the discharge port 48 or the density measuring unit 50. (Drying Processing Section) The drying processing section 44 is divided into a heat blowing section 52 and a conveying section 54, as shown in FIGS. (Heat Blower) The heat blower 52 is the printer processor 10.
It is provided on the body side of. Inside the side wall 56 of the printer processor 10, the heater 5 forming the heat blower 52 is formed.
8 are arranged along the conveyance direction of the printing paper P. A fan 62 housed in a fan box 60 is disposed behind the heater 58, and the air outlet of the fan box 60 is located behind the heater 58. An opening 64 is formed in the side wall 56 facing the heater 58 and is covered with a mesh 66. From the opening 64, the transport unit 5
The hot air is sent to the chamber 117 provided under the flat plate 116 arranged at No. 4.

The mesh 70 is also provided above the opening 64.
An opening 68 covered with is formed. A suction port of the fan box 60 sucks outside air and return air through the opening 68. (Conveying Section) As shown in FIGS. 3 and 4, the conveying section 54 is
A hollow, rectangular housing 82 is provided. A triangular rib plate 84 is provided on the rear wall of the housing 82 so as to project outward. An arcuate cover 86 is bridged between the rib plates 84. This cover 86
An upper hinge 81 is fixed to the rear wall of the housing 82 so as to be covered with the. The upper hinge 81 is pivotally supported by the shaft 83. Both ends of the shaft 83 are supported by a lower hinge 85 fixed to the rear wall of the main body of the printer processor 10. A cam 87 is crimped onto the shaft 83 so as to rotate integrally with the shaft 83. Cam surface 87A of this cam 87
Is a substantially arc-shaped curved surface, and due to the change in the contact angle,
The force for pressing a slider 88 described later is changed.

On the other hand, a spring 90 is installed on the bottom wall of the casing 89 constituting the lower hinge 85.
A slider 88 having a downward opening is fixed to the upper end of the spring 90, and the upper surface 88A is in contact with the cam surface 87A. The slider 88 is mounted in the casing 89 so as to be movable up and down, and its movement is stopped by a throttle portion 91 formed on the side wall against the biasing force of the spring 90.

As a result, the transport section 54 is opened around the shaft 83 with respect to the main body of the printer processor 10,
The opening range is restricted at the position where the upper hinge 81 contacts the lower hinge 85. Further, the force with which the cam 87 presses the slider 88 changes due to the difference in the opening angle of the transport unit 54, and the balance between the drop torque of the transport unit 54 and the flip-up torque of the cam 87 is maintained, so that the transport unit 54 has an arbitrary value. Stopped at the position. The slider 88 and the diaphragm 91
By the above, the transport unit 54 is held in the stopped state.

On the front wall of the housing 82, printing paper P
A standing wall 96 having a discharge port 48 (see FIG. 8) for discharging the air is raised. In addition, a side wall 98 that faces the opening 68 of the heat blowing unit 52 when the transport unit 54 is set on the processing tank 42 is formed at the end portion in the width direction. A flange 99 extends horizontally in the upper end of the side wall 98, and is supported by a stepped portion 100 formed on the front surface of the heat blower 52 in a state in which the conveying portion 54 is set. Further, a slit 102 is formed on the side wall 98, which serves as a passage for introducing outside air into the opening 68.

Due to the structure of the housing 82, as shown in FIGS. 6 and 7, the printer processor 1
On the upper surface of 0, the transport surface 104 is cut down by one step. At the center of the transport surface 104, the transport belt 106
Is provided, and the finished print discharged from the discharge port 48 is conveyed.

A lock claw 108 is provided on the free end side of the housing 82 and can be swung by a lever 110. The lock claw 108 is biased toward the housing 82 by a spring (not shown). As a result, when the transport unit 54 is set on the processing tank 42,
While the side surface of the lock claw 108 slides on the lock bar 112 protruding from the side wall of the printer processor 10, the lock claw 108 passes through the lock bar 112 and is returned by the biasing force of the spring to be locked by the lock bar 112. Has become. When the locked state is released, the lock claw 108 can be separated from the lock bar 112 by pulling the lever toward you.

On the other hand, as shown in FIGS. 3 and 4, a plurality of skewer rollers 114 are sequentially arranged in the housing 82 in the conveying direction of the printing paper P. The roller surface of the skewer roller 114 projects from a hole formed in the flat plate 116. Further, through holes are formed in the flat plate 116 at predetermined intervals, and the hot air sent from the opening 64 of the heat blowing part 52 to the chamber 117 provided under the flat plate 116 is blown up. There is.

An endless mesh belt 122 made of a band-shaped mesh is arranged on the upper side so as to face the flat plate 116. Both ends of the mesh belt 122 are rollers 11
8 and 120 are wound around, and tension is applied by a pressing roller 124 arranged corresponding to the roller 120.

Between the mesh belt 122 and the skewer roller 114, the water-treated photographic printing paper P is conveyed by a pair of conveying rollers 126, 12.
It comes to be sent via 8. The sent photographic printing paper P is sent to the carrying rollers 130 and 132 while being pressed against the net belt 122 by hot air. Conveyor roller 1
On the downstream side of 32, a guide plate 134 for switching the transport path is provided, and the unloading roller 136 for transporting the photographic printing paper P to the density measuring unit 50, or the unloading for delivering to the discharge port 48 (see FIG. 8). It guides the roller 138.

Further, as shown in FIG. 8, a shaft 74 is erected from the upper plate 52A of the heat blower 52. A cylindrical body 76, to which the substrate of the concentration measuring unit 50 is fixed, is inserted into the shaft 74. A plate piece 78 projects horizontally from the lower end of the cylindrical body 76. This piece of plate 7
8 is a stopper 8 protruding from the side wall of the heat blower 52.
It comes into contact with 0 and regulates the turning range of the concentration measuring unit 50. By evacuating the concentration measuring unit 50 to the side of the heat blowing unit 52, the transport unit 54 can be opened. (Driving force transmission mechanism) As shown in FIGS.
A drive gear 140 driven by a motor (not shown) is provided on the second side. The drive gear 140 is composed of a large gear 140A and a small gear 140B that are coaxially arranged, and the large gear 140A is a transmission gear of a drive system that drives a conveyance roller arranged in the processing tank 42. It meshes with 142.

On the other hand, the small gear 140B can mesh with a moving gear 146 which is axially supported by a substantially trapezoidal support plate 144. The end of the support plate 144 is swingably supported by a shaft 148. On this shaft 148, the small gear 14
The transmission gear 150 is arranged at a predetermined distance from 0B. The predetermined interval means that the moving gear 146 is the transmission gear 1
The distance between the large gear 150 </ b> A and the small gear 140 </ b> B forming the gear 50 cannot pass. Further, the small gear 150B that constitutes the transmission gear 150 transmits the driving force to the gear 152 of the conveyor drive system that drives the skewer roller 114 and the like.

Next, the operation of the driving force transmission mechanism according to this embodiment will be described. In a state in which the transport unit 54 is set on the processing tank 42, the movable gear 146 pivotally supported by the swingable support plate 144 can mesh with the small gear 140B of the drive gear 140 as shown in FIG. It is in a state. Here, when a drive gear 140 is rotated in the direction of arrow A by driving a motor (not shown), the transmission gear 142 rotates in the direction of arrow B, and the rollers arranged in the processing tank 42 rotate normally.

At this time, the movable gear 146 is the drive gear 1
40 and the large gear 150A constituting the transmission gear 150, and the driving force is transmitted to the transmission gear 150 by rotating in the direction of arrow C. Therefore, the gears 152 of the transport unit drive system
The driving force is transmitted to the skewer rollers 114 and the like arranged in the transport unit 54, and the photographic printing paper P is transported while being dried.

Next, in order to wash the rollers of the processing tank 42, the motor is rotated in the reverse direction to rotate the drive gear 140 in the direction of arrow D, and the moving gear 146 rotates in the direction of arrow E as shown in FIG. Then, the support plate 144 is pushed in the direction of the arrow F together with the moving gear 146, and the moving gear 146 moves
The drive force is not transmitted to the transmission gear 150 by leaving the shaft 0B and spinning idle.

Therefore, the driving force is not transmitted to the driving system of the conveying section 54, and the tooth skipping due to the reverse rotation and the mesh belt 1 occur.
22 meandering and the like can be prevented.

In this embodiment, the movable gear 146 can be retracted by utilizing the swing of the support plate 144. This is because the position of the movable gear 146 adjusts the position of the fulcrum of the support plate 144. This is because it can be done easily. In short, the moving gear 14 is
6 may be arranged so as to be able to bite between the drive gear 140 and the transmission gear 150. An elongated hole is formed in the fixed plate, the movable gear 146 is axially supported by this, and is urged by a spring. May be.

[0035]

Since the present invention has the above-mentioned structure, even if the drive system of the processing section is reversed, the drive system of the drying processing section is not reversed. Therefore, it is possible to prevent tooth skipping and meandering of the mesh belt.

[Brief description of drawings]

FIG. 1 is a side view of a main part of a driving force transmission mechanism according to an embodiment.

FIG. 2 is a side view of a main part of the driving force transmission mechanism according to the present embodiment.

FIG. 3 is a side view showing a state in which a conveyance unit including a driving force transmission mechanism according to the present embodiment is set.

FIG. 4 is a side view showing a state in which a transport unit including the driving force transmission mechanism according to the present embodiment is opened.

FIG. 5 is a front cross-sectional view showing a state in which the carrying section including the driving force transmission mechanism according to the present embodiment is set.

FIG. 6 is a perspective view showing a state in which a conveyance unit including a driving force transmission mechanism according to the present embodiment is set.

FIG. 7 is a perspective view showing a state in which a conveyance unit including a driving force transmission mechanism according to the present embodiment is opened.

FIG. 8 is a front perspective view of a conveyance unit including a driving force transmission mechanism according to the present embodiment.

FIG. 9 is a schematic diagram showing an overall configuration of a printer processor.

FIG. 10 is an overall perspective view of a printer processor.

[Explanation of reference numerals] 140 drive gear 144 support plate 146 moving gear 150 transmission gear

Claims (2)

[Claims] 1. A drive force transmission mechanism of a printer processor, wherein a drive force is transmitted by a single drive source to a processing section drive system of a processing tank and a drying section drive system of a drying processing section provided in the printer processor, A moving gear that meshes with the transmission gear and the driving gear or that retracts from the driving gear depending on the rotation direction of the driving gear is provided between the transmission gear that constitutes the drying unit driving system and the driving gear that is driven by the driving source. A driving force transmission mechanism for a printer processor, which is characterized in that 2. The driving force transmission mechanism for a printer processor according to claim 1, wherein the movable gear is pivotally supported by a support plate that is swingably supported.