JPH0711999Y2 - Paper guide device for printing machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a paper guide device for a printing machine.

Conventional Technology First, a conventional example is shown in FIGS. 3 and 4. Reference numeral 1 denotes a platen, and a carrier (not shown) that reciprocates along the axial direction of the platen 1 is provided with a printing head 2 as a printing unit and a card holder 3 along the outer peripheral surface of the platen 1. An opening 4 is formed in the center of the card holder 3 so as to face the tip of the print head 2. Further, a paper pan 7 for holding the pinch rollers 5, 6 with respect to the platen 1 so as to be freely contactable and separable and rotatable is provided, a tractor 8 is provided at a rear part of the platen 1, and further, is contacted and separated at an upper part of the platen 1. A paper bail roller 9 is provided rotatably. Further, below the front surface of the card holder, a deflector 19 for pressing the sheet 10 against the platen 1 is provided.

Since the deflector 19 is located below the front end of the printing head 2, it has a lateral length close to the length of the platen 1, but since the card holder 3 reciprocates together with the carrier, the lateral length. If is lengthened, it interferes with the left and right frames and limits the movement range of the carrier. As a result, the length of the card holder 3 is short.

Problems to be solved by the invention When the paper 10 is set on the outer periphery of the platen 1, the carrier is moved to the center, and the card holder 3 guides the central part of the paper 10 between the platen 1 and the paper bail roller 9. However, since the lateral length of the card holder 3 is short, the left and right sides of the sheet 10 have an action of advancing in the tangential direction of the platen 1 beyond the upper edge of the deflector 19. As a result, the center of the paper 10 is guided by the card holder 3 between the paper bail roller 9 and the platen 1,
Both sides of 10 hang down to the carrier side. Reference numeral 10a denotes a portion where both sides of the paper 10 hang down. If the paper 10 is continuously fed as it is, both sides of the paper 10 are folded and pass between the paper bail roller 9 and the platen 1 to increase the paper feeding resistance, which may cause a jam.

The folding of the sheet 10 at the time of setting the sheet as described above occurs during the manual operation, the automatic loading, or the sheet is fed by the tractor 8. At the time of auto loading, when the mode is selected as auto loading, the carrier is moved to a position facing the center of the platen 1, and then the platen 1 is moved until the paper 10 passes under the paper bail roller 9. It rotates.

Means for Solving Problems A printing unit and a card holder along the outer peripheral surface of the platen are mounted on a carrier that reciprocates along the axial direction of the platen, and a pinch roller and a paper bail roller are attached to the platen. In the printing machine provided so as to be freely contactable and separable, a pair of left and right deflectors along the outer peripheral surface on the carrier side near both ends of the platen are provided so as to be movable in a direction orthogonal to the axis of the platen and to be fixed at an arbitrary position.

Action When passing the paper between the platen and the paper bail roller, move the left and right deflectors close to the paper bail roller, guide the center of the paper with the card holder, and guide both sides with the deflectors, and The whole can be aligned and passed under the paper bale roller. When printing, the left and right deflectors are retracted from the paper bail roller to prevent interference between the printing section or the card holder and the left and right deflectors.

Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 and 2. The same parts as those described in FIGS. 3 and 4 are designated by the same reference numerals, and the description thereof will be omitted. On the carrier side front surface of the platen 1, there are provided a pair of left and right deflectors 11 along the outer peripheral surfaces near both ends of the platen 1 and a deflector 12 along the central outer peripheral surface of the platen 1. The projecting pieces 13 formed on the lower edges of the deflectors 11 and 12 are inserted into square holes 15 formed in a part of a base frame 14 of the printing machine. Further, a spring 16 is stretched between the base frame 14 and the projecting piece 13, whereby the deflectors 11, 1 are
2 is urged in the clockwise direction in FIG. 1 and urged downward with the engaging portion between the projecting piece 13 and the square hole 15 as a fulcrum, and its upper edge is elastically contacted with the platen 1. Further, a drive shaft 17 connected to a motor (not shown) capable of rotating in the normal and reverse directions is rotatably held on the paper pan 7, and the deflector 11 arranged on both left and right sides of the drive shaft 17 is rotatably held.
One end of a lever 18 that abuts the lower edge is fixed.

In such a configuration, the lever 18 is normally located below as shown by the phantom line in FIG. 2, but when the auto loading mode is selected, the drive shaft 17 moves together with the lever 18 in the clockwise direction in FIG. Since it rotates about 90 degrees, the left and right deflectors 11 are moved to the lever 18 as shown by the solid line in FIG.
The upper edge of the platen 1 is pushed closer to the paper bail roller 9, and on the other hand, no matter where the carrier is, the platen 1
Move to a position facing the center of and stop. continue,
The platen 1 rotates by a certain angle until the leading edge of the paper 10 passes under the paper bail roller 9. At this time, paper 10
Is fed to the platen 1 side by the central deflector 12 while the leading edge is directed upward, and the central portion is guided by the card holder 3 so that the left and right deflectors 11 are on both sides.
The upper edge is aligned and is passed through between the platen 1 and the paper bail roller 9. As a result, it is possible to prevent the both sides of the sheet 10 from being folded and the occurrence of a jam. When printing, the drive shaft 17 is rotated in the opposite direction together with the lever 18, so that the left and right deflectors 11 are returned downward by the urging force of the spring 16 as shown by the phantom line in FIG. 2 and retracted from the paper bail roller 9. By doing so, the print head 2 or the card holder 3 does not interfere with the left and right deflectors 11.

As a means for moving the left and right deflectors 11,
The lever 18 may be manually rotated. Further, the deflector 11 may be moved by an electromagnet.

Effect of the Invention Since the present invention is configured as described above, when the paper is passed between the platen and the paper bail roller, the left and right deflectors are brought close to the paper bail roller, and the central part of the paper is guided by the card holder. By guiding both sides with the deflectors, the entire leading edge of the paper can be aligned and passed under the paper bail roller. This has the effect of preventing interference between the card holder and the left and right deflectors.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention. FIG. 1 is a side view, FIG. 2 is a reduced front view showing the arrangement and operation of a deflector without a carrier, FIG. 3 and FIG. Fourth
FIG. 3 shows a conventional example, FIG. 3 is a side view, and FIG. 4 is a partial perspective view. 1 ... Platen, 2 ... Printing part, 3 ... Card holder, 5, 6 ...
Pinch roller, 9 ... Paper bail roller, 10 ... Paper,
11 ... Day deflector

Claims (1)

[Scope of utility model registration request] 1. A printing unit and a card holder along the outer peripheral surface of the platen are mounted on a carrier that reciprocates along the axial direction of the platen, and a pinch roller and a paper bail roller can be brought into and out of contact with the platen. In the printing machine provided in the above, a pair of left and right deflectors along the outer peripheral surface on the carrier side near both ends of the platen are provided so as to be movable in a direction orthogonal to the axis of the platen and to be fixed at an arbitrary position. Paper guide device for printing machines.