JPH0641231Y2 - Feeder for photographic photosensitive material in printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a photographic light-sensitive material feeding device of a printer for continuously printing a color negative image on a long photographic light-sensitive material.

[Conventional technology and its problems]

As shown in FIG.
The roller-shaped photographic light-sensitive material P set in the above is passed from the exposure unit 21 to the conveying device 22 arranged on the unloading side of the exposure unit 21, the photographic light-sensitive material P is exposed in the exposure unit 21, and then the conveying device By the operation of 22, the photographic light-sensitive material P is intermittently fed forward with a length substantially corresponding to the length dimension of the image frame as a feed amount.

In the printer as described above, usually, a feeding device 30 is provided on the unloading side of the paper feeding unit 20, and the roller-shaped photographic photosensitive material P set in the paper feeding unit 20 by the operation of the feeding device 30 is exposed to the exposing unit 21. It is configured to be sent to the transport device 22 from.

As a conventional technique of the feeding device 30, there is one shown in FIGS. 5 and 6. This feeding device 30 passes a stay 34 between a pair of side plates 33 supporting a roller shaft 32 of a drive roller 31, and a roller frame 35 attached to the stay 34.
The pair of supporting pieces 36 of the drive roller 31 have a long hole 37 long in the radial direction.
The roller shaft 39 of the pressure roller 38 is inserted into the long hole 37, and the spring 40 is incorporated into the long hole 37 to form the pressure roller.
38 is pressed against the outer periphery of the drive roller 31.

In this feeding device, the photographic photosensitive material P is inserted between the rollers 31 and 38 in a state where the pressure roller 38 is separated from the drive roller 31, and the pressure roller 38 is brought into pressure contact with the drive roller 31, and then the drive roller 31 is moved. The photographic photosensitive material P is fed by being rotated.

In the above-mentioned feeding device, since the pressure roller 38 is pressed against the drive roller 31 by the elastic force of the spring 40, the pressure roller 38 can be uniformly pressed against the drive roller 31, and the photographic photosensitive material can be made to meander. It has a feature that it can be accurately conveyed.

However, the roller shaft 39 of the pressure roller 38 is supported by the projections 42 at the front portions on both sides of the roller support frame 41 that is movably supported toward the drive roller 31, and the bending piece 43 is provided at the rear portion of the support frame 41.
Is provided, the roller support frame 41 is moved by the rotation of the cam 44 brought into contact with the bent piece 43, and the pressure roller 38 is driven by the drive roller.
Since it is configured to come into contact with and separate from the 31, there is a disadvantage that the feeding device becomes large.

Further, the roller support frame 41 that supports the pressure roller 38 is attached to the cam 44.
Requires a relatively large driving force, and the relative position of the bent piece 43 and the cam 44 must be adjusted to adjust the amount of crimp release. There is an inconvenience that it is very time-consuming.

[Purpose of device]

Therefore, the object of the present invention is to solve the above-mentioned problems and to provide a small-sized feeder having a simple structure which is easy to assemble.

[Constitution of device]

In order to achieve the above object, according to the present invention, a roller shaft of a driving roller supports a pair of side plates provided on both sides of a roller frame, and the side plates are provided with long guide holes toward the roller shaft. The roller shaft of the pressure roller is slidably inserted into the hole, and a spring for pressing the roller shaft of the pressure roller toward the roller shaft of the drive roller is incorporated into the guide hole, and the swing frame is used by the roller shaft of the drive roller. A pair of pressure release arms provided on both sides of the pressure release arm are swingably supported, and the middle of the side edge of the pressure release arm is brought into contact with the roller shaft of the pressure roller, and the swing end of the swing frame is pressed against the roller frame. The solenoid is attached.

[Action]

According to the above configuration, when the solenoid is operated, the swing frame swings around the roller shaft of the drive roller, and the roller shaft of the pressure roller is pushed by the pair of pressure release arms of the swing frame. The roller shaft moves along the guide hole,
The pressure roller can be separated from the drive roller.

When the excitation of the solenoid is released, the roller shaft of the pressure roller is pushed by the elastic force of the spring, and the pressure roller can be pressed against the drive roller.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

As shown in the figure, the roller shaft 2 of the drive roller 1 is rotatably supported by a side plate (not shown), and the roller frame 3 is supported by the roller shaft 2.

The roller frame 3 is provided with a connecting member 5 between a pair of side plates 4, and the lower portion of the side plate 4 is swingably supported by the roller shaft 2 of the drive roller 1. Further, a guide hole 6 which is long in the radial direction of the drive roller 1 is formed in the side plate 4, and a roller shaft 8 of a pressure roller 7 is slidably inserted into the guide hole 6. A spring 9 for pressing the pressure roller 7 against the drive roller 1 is incorporated in the guide hole 6.

A vibrating frame 10 is supported on the roller shaft 2 of the drive roller 1. This swing frame 10 has a pair of crimp release arms 11 on both sides.
And a connecting arm 12 between the upper portions of the crimp release arm 11.
The lower part of the pressure release arm 11 is swingably supported by the roller shaft 2 of the drive roller 1. Also,
The middle of the side edge of the pressure release arm 11 is in contact with the roller shaft 8 of the pressure roller 7. Therefore, when the swing frame 10 is swung around the roller shaft 2 of the drive roller 1 toward the pressure roller 7, the roller shaft 8 of the pressure roller 7 is pushed by the pressure release arm 11 and the roller shaft 8 is rotated. Can move along the guide hole 6 to separate the pressure roller 7 from the drive roller 1.

When the pressure release arm 11 is swung to bring the pressure roller 7 into contact with or away from the drive roller 1, the roller frame 3 is prevented from swinging and its posture is not changed.

The connecting member 5 of the roller frame 3 is provided with a solenoid support plate 13 facing the outer surface of the connecting arm 12 of the swing frame 10, and the plunger 15 of the solenoid 14 supported by the solenoid support plate 13 is It is connected to the connecting arm 12 located at the swing end of the swing frame 10.

When the solenoid 14 is excited to move the plunger 15 forward, the swinging frame 10 rotates in the direction of the arrow in FIG. 2 around the roller shaft 2 of the driving roller 1, and the pressure release arm 11 causes the pressure roller 7 to rotate. Press the shaft 8. Therefore, the pressure roller 7
Roller shaft 8 resists the elasticity of spring 9 and guide hole 6
The pressure roller 7 slides away from the drive roller 1 as shown in FIG.

After the pressure roller 7 is separated from the drive roller 1 as described above, the photographic photosensitive material P shown in FIG. 4 is inserted between the rollers 1 and 7. When the excitation of the solenoid 14 is released after the photographic photosensitive material P is inserted, the oscillating frame 10 oscillates in the direction of the arrow in FIG. 3 due to the elastic force of the spring 9, and the roller shaft 8 of the pressure roller 7 comes into the guide hole 6. The photographic photosensitive material P can be held between the pressure roller 7 and the driving roller 1 by moving along, and the photographic photosensitive material P can be conveyed by rotating the driving roller 1.

〔effect〕

As described above, according to the present invention, the roller shaft of the drive roller supports the roller frame and the swing frame, and the solenoid for swinging the swing frame is attached to the roller frame with a simple structure having a small number of parts. Therefore, the assembling is easy, and the size of the feeding device can be reduced. Further, since the solenoid presses the swinging end of the swinging frame, the action of the lever causes the swinging frame to have a relatively small pressing force. Can be swung, and a solenoid with a small capacity can be used.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a feeding device according to the present invention, FIG. 2 is a side view of the same as above, FIG. 3 is a vertical cross-sectional side view showing a pressure release state as above, and FIG. A schematic view, FIG. 5 is a perspective view showing a conventional feeding device, and FIG. 6 is a vertical sectional side view of the same. 1 ... Drive roller, 2 ... Roller shaft, 3 ... Roller frame, 4 ... Side plate, 6 ... Guide hole, 7 ... Crimping roller, 8 ... Roller shaft, 9 ... Spring, 10 ... Shake Moving frame, 11 …… Crimping release arm, 14 …… Solenoid

Claims (1)

[Scope of utility model registration request] 1. A pair of side plates provided on both sides of a roller frame are supported by a roller shaft of a drive roller, a long guide hole is provided in the side plate toward the roller shaft, and the roller shaft of a pressure roller is slid into the guide hole. A pair of crimps that are freely inserted and have a spring that presses the roller shaft of the pressure roller toward the roller shaft of the drive roller in the guide hole, and that is provided on both sides of the swing frame by the roller shaft of the drive roller. Photographic exposure in a printer in which a release arm is swingably supported, a midpoint of a side edge of the pressure release arm is contacted with a roller shaft of a pressure roller, and a solenoid for pressing the swing end of the swing frame is attached to the roller frame. Material feeder.