JPS625868A - Printing machine paper feed device - Google Patents

Abstract

PURPOSE:To unnecessitate an operation for fitting and detaching a guide plate and prevent a pinch roller from being erroneously brought into contact with a platen when a fanfold paper is used, by providing a hinge part for supporting a guide plate so that it can be raised and tilted down at a lower part of a platen. CONSTITUTION:A paper other than a fanfold paper 9, such as a slip 10, is led to a platen 1 by the guide plate 6 in the raised state, and is fed by the platen 1 and a pinch roller 2. The fanfold paper 9 is fed by a pin feeding mechanism 4 by tilting down the guide plate 6. In this case, the pin feeding mechanism 4 is exposed to the surface of the plate 6 through an opening 5. By interconnecting a pinch roller switching mechanism 3 and the guide plate 6 to each other, the operation for contact and separation of the pinch roller 2 from the platen 1 is automatically performed when the guide plate 6 is raised according to the paper being used, thereby pre;venting erroneous operations.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a paper feeding device for a printing machine.

2. Description of the Related Art Conventionally, as shown in FIGS. 6 and 7, a pinch roller 51 and a pin feed mechanism 52 are provided which move toward and away from a platen 50. When the fan fold paper 53 is fed by the pin feed mechanism 52, the pinch roller 51 When separating the paper from the platen 50 and feeding the other paper 54, use the pinch roller 5.
1 is in contact with the platen 5o. When the paper 54 other than the fanfold paper 53 is a cut sheet 55, a guide plate 56 is attached to support the cut sheet 55 as shown in FIG.

Problems to be Solved by the Invention Therefore, the attachment and detachment of the guide plate 56 must be selected by means of five-sheet feeding, which is cumbersome to operate.

It is also inconvenient to store the removed guide plate 56. Furthermore, when the fanfold paper 54 is fed by the pin feed mechanism 52, an erroneous operation that causes the pinch roller 51 to come into contact with the platen 50 occurs. In this case, there is an influence such as an error in the outer diameter of the platen 50, and the platen 5o and the pinch roller 50
There is a difference between the amount of paper fed by the pin feed mechanism 52 and the amount of paper fed by the pin feed mechanism 52, which may cause the feeding holes on both sides of the fanfold paper 54 to tear or cause a paper jam.

This invention has been made in view of these points, and although a guide plate is used depending on the type of paper, the operation of attaching and detaching the guide plate is eliminated, and also a pinch roller is used when using fanfold paper. The purpose is to prevent the paper feed device of a printing machine from accidentally touching the platen.

Means for Solving the Problems The first invention, as shown in FIG. A guide plate 6 having opposing openings 5 is provided, and a hinge portion 6a is provided at the lower part of the platen 1 to hold the guide plate 6 in a freely undulating manner.

In the second invention, the pinch roller switching mechanism 3 and the guide plate 6 are interlocked and connected.

In the third invention, as shown in FIGS. 4 and 5, a paper bail roller switching mechanism 8 for moving the paper bail roller 7 toward and away from the platen 1 and a pinch roller switching mechanism 3 are interlocked and connected.

Operation As shown in FIG. 2, the paper sheets 10 and other paper sheets other than the fanfold paper 9 are guided to the platen 1 by the upright guide plate 6, and fed by the platen 1 and the pinch rollers 2. Third
As shown in the figure, the fanfold paper 9 is fed by the pin feed mechanism 4 by folding down the guide plate 6. At this time, the pin feed machine 41!4 is exposed from the opening 5 to the surface of the guide plate 6.

In addition, by interlocking and connecting the pinch roller switching mechanism 3 and the guide plate 6, when the guide plate 6 is raised or lowered depending on the paper being used, the pinch roller 2 moves toward and away from the platen 1 automatically, thereby preventing erroneous operation. do.

Furthermore, by interlocking and connecting the pinch roller switching mechanism 3 and the paper bail roller switching mechanism 8, the platen 1
The pinch roller 2 and paper bail roller 7 are brought into contact with and separated from each other by one operation.

Embodiment A first embodiment of the present invention will be described with reference to FIGS. 1 to 3. Reference numeral 1 denotes a platen, and a printing plate 11 faces the front surface of the platen. A pinch roller arm 12 holding the pinch roller 2 is urged toward the half-hour hand by a spring 13 and is held rotatably about a shaft 14 as a fulcrum. The pinch roller switching mechanism 3 includes a rotatably held shaft 15 and this shaft 1.
It consists of a cam 16 fixed to the shaft 15 and an operating lever 17 fixed to the left end of the shaft 15. Also, fanfold paper 9
A pin feed mechanism 4 is provided for feeding the liquid to the lower part of the platen 1. Further, on both sides of the rear part of the paper pan 18 facing the lower part of the platen 1, a fulcrum shaft 6a serving as a hinge part is provided.
are provided, and a guide plate 6 having an opening 5 is held on these fulcrum shafts 6a so as to be movable. The fulcrum shaft 6a is an extension of the surface of the pin feed mechanism 4 and is located at a position facing the lower part of the platen 1. Furthermore, a paper bail roller arm 19 that supports a paper bail roller 7 that contacts the upper part of the platen 1 is rotatably held by a shaft 20. The operating lever 17 and the guide plate 7 are interlocked and connected by a link 21.

In such a configuration, when using the cut sheet 10 or other paper other than the fanfold paper 9.

As shown in FIG. 2, the operating lever 17 is rotated clockwise together with the shaft 15 and cam 16. As a result, the link 21 is pulled toward the cam 16, the guide plate 6 is rotated upward around the fulcrum shaft 6a, and the high bar of the cam 16 is detached from the pinch roller arm 12.
is rotated counterclockwise by the force of the spring 13 to bring the pinch roller 2 into resilient contact with the platen 1. Therefore, the paper such as the cut sheet 10 is guided to the lower part of the platen 1 by the guide plate 6, and is fed by the platen 1 and two pinch rollers.

When using the fanfold paper 9, the operating lever 17 is rotated counterclockwise together with the shaft 15 and the force 1116, as shown in FIG. As a result, the link 21 is pushed toward the platen 1 side, the guide plate 6 rotates downward, and the cam 1
6 pushes up the pinch roller arm 12 clockwise to separate the pinch roller 2 from the platen 1. The pin feed mechanism 4 is exposed on the surface of the guide plate 6 through the opening 5 and feeds the fanfold paper 9 to the lower part of the platen 1.

In this way, when the pin feed mechanism 4 feeds the paper, the guide plate 6 is rotated downward, but at this time the pinch roller 2 can be automatically moved away from the platen 1, so that erroneous operation can be prevented. Can be done. The guide plate 6 can also be left attached at all times, saving the effort of attaching and detaching it.

Next, a second embodiment of the present invention will be described based on FIGS. 4 and 5. The same parts as in the previous embodiment are designated by the same reference numerals, and the description thereof will be omitted. Paper bail roller arm 19
is biased by the spring 24 in the direction toward and away from the platen 1 from the neutral point. That is, a spring 24 is stretched between a pin 22 erected at the lower end of the paper bail roller arm 19 and a pin 23 erected from a frame (not shown). In addition, a long hole 2 is held by a guide pin 25 that is installed upright in the frame on the right side opposite to the operating lever 17.
A sliding rod 27 with 6 is provided. This sliding rod 2
A spring 29 is attached to the pin 28 and the guide pin 25 that are installed upright in
is installed. The sliding rod 27 and the cam 30 form a paper bail roller switching mechanism 8. By fixing this cam 30 to the right end of the shaft 15, the pinch roller switching mechanism 3 and the paper bail roller switching mechanism 8 are interlocked and connected.

Therefore, when the operating lever 17 is rotated counterclockwise to move the pinch roller 2 away from the platen 1 from the state shown in FIG. 4, the high bar of the cam 30 pushes the sliding rod 27 as shown in FIG. The moving rod 27 pushes the paper bail roller arm 19 away from the platen 1. Thereby, the paper can be set without getting caught on the paper bail roller rough and causing a paper jam.

Note that in the state shown in FIG. 4, it is also possible to manually move the paper bail roller arm 19 away from the platen 1.

Effects of the Invention Since the present invention is configured as described above, paper other than fanfold paper is guided to the platen by an upright guide plate,
The paper can be fed by a platen and a pinch roller, and the fanfold paper can be fed by folding down the guide plate and using the pin feed mechanism 4. Therefore, it is possible to eliminate the trouble of attaching and detaching the guide plate. By interlocking and connecting the switching mechanism and the guide plate, when the guide plate is raised or lowered depending on the paper being used, the pinch roller can automatically move toward and away from the platen to prevent erroneous operations. By interlocking and connecting the switching mechanism and the paper bail roller switching mechanism, there is an effect that the pinch roller and the paper bail roller can be moved toward and away from the platen with a single operation.

[Brief explanation of drawings]

1 to 3 show a first embodiment of the present invention, in which FIG. 1 is a partially cutaway perspective view, and FIG. 2 is a side view showing a state in which paper such as a cut sheet is used. , FIG. 3 is a side view showing the state in which fanfold paper is used, and FIGS. 4 and 5 show a second embodiment of the present invention. FIG. FIG. FIG. 5 is a side view showing the paper bail roller in a state separated from the platen, and FIGS. 6 to 8. FIG. 2 is a side view showing a conventional example. DESCRIPTION OF SYMBOLS 1...Platen, 2...Pinch roller, 3...Pinch roller switching mechanism, 4...Pin feed mechanism, 5...
... Opening, 6... Guide plate, 6a... Fulcrum shaft (hinge part), 7... Paper bail roller, 8... Paper bail roller switching mechanism, 9... Fanfold paper, 10... ...Single sheet (paper) J2-Figure 53 Figure 36 (Wing U) J-7 Figure (Wing U)

Claims (1)

[Claims] 1. A pinch roller switching mechanism for moving a pinch roller toward and away from the platen, and a pin feed mechanism for supplying fanfold paper to the lower part of the platen, and having an opening facing the pin feed mechanism. a guide plate for guiding paper other than the fanfold paper to a lower part of the platen;
A paper feed device for a printing machine, characterized in that a hinge portion is provided at a lower portion of the platen to hold the guide plate upwardly from a plane on the pin feed mechanism in a freely undulating manner. 2. A pinch roller switching mechanism for moving the pinch roller toward and away from the platen, and a pin feed mechanism for supplying fanfold paper to the lower part of the platen, and having an opening facing the pin feed mechanism to feed the fanfold paper. A guide plate is provided to guide paper other than the paper to the lower part of the platen,
Printing characterized in that a hinge portion is provided at the lower part of the platen to hold the guide plate upwardly and undulatingly from a plane on the pin feed mechanism, and the pinch roller switching mechanism and the guide plate are interlocked and connected. Paper feeder of the machine. 3. A pinch roller switching mechanism for moving a pinch roller toward and away from the platen, a pin feed mechanism for supplying fanfold paper to the lower part of the platen, and a paper bail roller switching mechanism for moving a paper bail roller toward and away from the platen. , a guide plate having an opening facing the pin feed mechanism and guiding paper other than the fanfold paper to a lower part of the platen is provided, and the guide plate is arranged at the lower part of the platen upward from a plane above the pin feed mechanism. 1. A paper feed device for a printing machine, characterized in that a hinge portion is provided to hold the paper bail roller in an up and down manner, and the pinch roller switching mechanism and the paper bail roller switching mechanism are interlocked and connected.