JPH0442839Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an autoloading mechanism for a photographic printer, and more particularly to an autoloading mechanism in an easel section.

[Conventional technology]

Regarding the paper autoloading of a photographic printer that uses long photographic paper, especially in the easel section of the printing section, the window for exposure is open, and especially when borderless printing is selected. Because the width of the paper (the width in the direction perpendicular to the paper feeding direction) is narrower than the fixed width of the paper or easel mask, the tip of the paper must be placed between the easel masks when feeding begins. cannot be shipped. Therefore, conventionally, at the start of paper feeding, a pair of movable masks, which are installed perpendicular to the paper feeding direction and can be slid in the feeding direction to border the front and rear ends in the paper feeding direction, are placed at predetermined intervals. Then, a plate-like bridge was raised in the space between the masks, and the paper was placed at a stop so as to maintain a predetermined interval, and the paper was allowed to run on this bridge, thereby performing autoloading of the paper. .

[Problem that the invention attempts to solve]

However, such a mechanism requires a bridge member and a motor as a drive source thereof, resulting in an increase in the number of parts, a complicated mechanism, and an increase in manufacturing costs. In addition, there is a possibility that the leading end of the paper may be caught on the bridge or the leading end of the movable mask on the downstream side with respect to the paper feeding direction, causing a jam.

In view of these problems, it is an object of the present invention to provide an autoloading mechanism for the easel section of a photographic printer that has a simple structure, can reduce manufacturing costs, and does not cause jams. .

[Means and actions for solving problems]

The autoloading mechanism according to the present invention includes, in an easel section, a pair of mask members installed in a direction perpendicular to the paper feeding direction, a light shielding member each having one end connected to the mask members, and and a driving source for sliding the mask members, so that the pair of mask members are held in a position where they come into contact with each other at the start of paper feeding.

Therefore, at the start of paper feeding, the leader and the paper are smoothly fed over the pair of mask members of the easel portion and the light shielding member connected thereto.

〔Example〕

An embodiment of the present invention will be described below with reference to the accompanying drawings. In the figure, reference numeral 1 denotes an easel section for determining the printing size and edging of the paper (photographic paper) fed in the photoprinting device, and 2 and 3 are easel sections installed in a direction perpendicular to the feeding direction P of the paper. A left mask on the upstream side and a right mask on the downstream side in the feeding direction, and these pair of masks 2 and 3
are slid in opposite directions in the feeding direction by a stepping motor (not shown) to determine the printing size of the paper and hold the paper;
This is a printing frame that performs edging (separation of adjacent frames/screens), and has protrusions 2a and 3a whose opposing tips protrude to form step-shaped lower surfaces. In addition, the left mask 2 and right mask 3 are driven by a stepping motor, so that in addition to the positions corresponding to each printing size of the paper, the position where both masks 2 and 3 are in contact with each other (see drawing) can be selected. It is configured. 4, 4 are light-shielding masks whose ends are fixed to the ends opposite to the protrusions 2a, 3a of the left mask 2 and right mask 3, respectively; 5, 5 are horizontally supporting parts of the light-shielding masks 4, 4, respectively; rotation axis, 6
Spring 7 has both ends connected to the other ends of the light-shielding masks 4, 4 and urges the left mask 2 and right mask 3 in a direction away from each other; 7, 7 supports the spring 6 by, for example, a roller or the like; 8 is a U-shaped pin holder fixed to the bottom surface of the left mask 2, 9 is a pin holder 8
The right mask pushing pin 9a is formed by penetrating both ends of the pin holder 8 and having a distal end protruding largely in the direction of the right mask 3.
It is supported so that it can slide horizontally. Reference numeral 9b is a collar fixed to the push pin 9 and located between both ends of the pin holder 8 on the pushing part 9a side; A spring is interposed between the push pins 9 and urges the push pin 9 in the right direction in the figure. 1
Reference numeral 1 denotes a right mask holder which supports the right mask 3 rotatably in a counterclockwise direction from a horizontal position by a shaft 12 implanted in an upright portion 11a, and 13 a right mask holder whose center portion is loosely wound around the shaft 12. The spring 13 is a spring whose both ends are locked to a locking pin 3b implanted in the right mask holder 11, respectively, and the spring 13 biases the right mask 3 clockwise about the shaft 12. The right mask 3 is held in a horizontal position under normal conditions. Further, rotation of the right mask 3 from the horizontal position in the clockwise direction is restrained by a restraining member (not shown). 14 is the protrusion 3 of the right mask 3
It is a pin abutting plate extending downward from the side surface of the a side, and the pin abutting plate 14 is a pin abutting plate that extends downward from the side surface of the a side, and when the left mask 2 and the right mask 3 are abutted, the pin abutting plate 14 is used just before both the masks 2 and 3 abut. The right mask 3 is pressed by the push portion 9a of the push pin 9 and rotates slightly counterclockwise around the shaft 12, so that the upper end of the protrusion 3a comes into contact with the lower end of the protrusion 2a of the left mask 2. (See Figure 1).

The present embodiment has the above configuration, and its operation will be explained next. First, when the start switch is pressed, the stepping motor is driven by a predetermined amount by a pulse signal sent from a control circuit (not shown), and the left mask 2 and right mask 3, which have been stopped at a position corresponding to a predetermined printing size, touch each other. The springs 6 connected to the other ends of the light-shielding masks 4, 4 are stretched in the left-right direction against their own elasticity. Immediately before the protrusions 2a and 3a of both the left and right masks 2 and 3 come into contact near the center of the easel part 1, the pushing part 9a of the pushing pin 9 is pressed against the pin abutting plate 1.
By pushing and slightly rotating the right mask 3 counterclockwise about the shaft 12 against the elasticity of the spring 13, the upper end of the protrusion 3a is aligned with the lower end of the protrusion 2a of the left mask 2. Both masks 2 and 3 are stopped at the position where they come into contact with the part (the position shown in FIG. 1). At this time, since the push pin 9 can slide to the left in the figure due to the elasticity of the spring 10, the impact when it comes into contact with the pin contact plate 14 can be alleviated, and the right mask 3 It can be rotated slowly. Further, the light shielding masks 4, 4 are equally tensioned between the ends of the spring 6 and both masks 2, 3 by the elasticity of the spring 6, respectively.

In this state, the paper fed from the magazine (not shown) is fed in the P direction at the easel section 1 over the light-shielding mask 4, the left and right masks 2 and 3, and then over the light-shielding mask 4. Since the upper end is in contact with the lower end of the protrusion 2a of the left mask 2 and is held tilted downward, there is no risk that the paper will get caught or jam.

After that, the paper feeding is stopped,
Both the left and right masks 2 and 3 are slid in directions away from each other based on the amount of drive of the stepping motor by a pulse signal, and the push pin 9 is moved away from the pin contact plate 1.
4, the right mask 3 returns to the horizontal position due to the biasing force of the spring 13, and then both the left and right masks 2, 3 are slid to a position corresponding to a predetermined printing size and then stopped.

As described above, according to this embodiment, there is no need to arrange a bridge member or its drive source in the easel section when paper feeding starts, and the structure is simple and there is no risk of paper jams, and the process can be carried out smoothly. Paper can be fed.

In this embodiment, the contact positions of the left and right masks 2 and 3 are detected by controlling the pulse signals supplied to the stepping motor, but other means may be used to detect the contact positions of the left and right masks 2 and 3. A positioning photo sensor may be installed to detect the position and stop the stepping motor.

[Effect of idea]

As described above, the autoloading mechanism according to the present invention has a simple structure, can reduce the number of parts, can reduce manufacturing costs, and can smoothly feed paper.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing an embodiment of an autoloading mechanism according to the present invention, and FIG. 2 is a plan view thereof. 1... Easel part, 2... Left mask, 3... Right mask, 4, 4... Light shielding mask, 6... Spring, 9... Push pin, 14... Pin contact plate.

Claims (1)

[Scope of utility model registration request] a pair of mask members installed in a direction perpendicular to the paper feeding direction and slid in the feeding direction to determine the printing size of the paper; and a light shielding member each having one end connected to the mask member. , a driving source for sliding the pair of mask members in the paper feeding direction, and the pair of mask members are held in a position where they are in contact with each other when paper feeding starts, and further Of the pair of mask members, the upstream mask member in the paper feeding direction includes a first mask and a pushing member, and the downstream mask member includes a second mask that can come into contact with the first mask and the second mask. and an abutting member that is pushed by the pushing member immediately before the second mask comes into contact with the first mask, and rotates the second mask so that it comes into contact with the lower end of the first mask. An autoloading mechanism in an easel section of a photographic printer, characterized in that: