JPH028787Y2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Technical Field of the Invention The present invention relates to a scale mechanism for indicating the printing position of characters, etc. in printers such as dot printers and serial printers, and is particularly applicable when a front inserter for feeding single sheets is installed. The present invention also relates to a scale mechanism that allows the scale to be used as is without being removed.

(2) Prior Art and Problems As shown in FIG. 1, a scale mechanism 1 of a conventional printer rotates a side plate member 4 around a support shaft 3 provided near both ends of a platen 2 using a nut 5 or the like. The platen 2 was movably supported, and a scale 6 was stretched along the longitudinal direction of the platen 2 at the tips of the platen members 4, 4 on both sides, and scale graduations were formed on the surface of the scale 6. A toggle spring 7, one end of which is fixed at an appropriate position on the main body, is connected to the edge of the scale 6, and the other end of the toggle spring 7 is fixed in two positions: A when the printer is operating and B when replacing paper. It was designed to be able to rotate in the directions of arrows A and B. In FIG. 1, reference numeral 8 is a paper guide for supplying continuous paper, reference numeral 9 is a print head, and reference numeral 10 is a tension type tractor.

To feed continuous paper in such a printer, the outer peripheral surface of the platen 2 is wound around the paper guide 8 side, and the continuous paper is pulled by the tractor 10. However, since the above-mentioned supply path for continuous paper cannot be used at all to supply single sheets, a front inserter 11 for supplying single sheets is installed near and above the platen 2.
The front inserter 11 feeds the cut sheet between the platen 2 and the print head 9. However, in the conventional scale mechanism 1, the side plate member 4 is quite long and the scale 6 at the tip extends over the mounting area of the front inserter 11 in both positions A and B as shown in FIG. It was hot. Therefore, it is not possible to mount the front inserter 11, or the scale mechanism 1 is removed and the front inserter 11
It was equipped with. In this case, it was inconvenient because it was not possible to check the printing position of characters etc. when printing on the slip.

(3) Purpose of the invention The present invention was made to solve the above-mentioned problems, and is to create a scale mechanism for a printer that allows the scale to be used as it is without removing it even when a front inserter for feeding single sheets is installed. The purpose is to provide.

(4) Structure of the invention According to the invention, the present invention provides a printer having a continuous paper supply path around a platen and a mounting area for a front inserter for supplying single sheets near the upper part of the platen. The scale for indicating the printing position along the continuous paper supply path near the platen is shortened so that its side plate member does not cover the mounting area of the front inserter during printer operation, paper replacement, and platen attachment/detachment. This is achieved by providing a scale mechanism for a printer that is rotatable so as to be fixed in three positions.

(5) Embodiments of the invention Hereinafter, embodiments of the invention will be described in detail based on the attached drawings.

FIG. 2 is a side view showing the scale mechanism of the printer according to the present invention. Around the platen 2, a paper guide 8, an outer peripheral surface of the platen 2,
A continuous paper supply path 12 is formed with a tension type tractor 10. And the above platen 2
A mounting area for the front inserter 11 for supplying tickets is formed near the top, and when printing on tickets, the front inserter 11 is mounted in this area.
It is now equipped with In FIG. 2, reference numeral 9 is a print head, and reference numeral 13 is a print mask.

Here, in the present invention, the scale mechanism 1 is installed along the continuous paper supply path 12 near the platen 2.
4 are provided. This scale mechanism 14 is
It indicates the printing position of characters, etc., and the side plate member 15 is attached to the support shaft 3 provided near both side ends of the platen 2.
is rotatably supported by fitting an elongated hole 16 formed approximately in the center thereof, and this both side plate member 1
A scale 17 is stretched along the longitudinal direction of the platen 2 at the tips of the plates 5 and 15.
A scale is formed on the surface. The other end of the toggle spring 18 is connected to the other end of the side plate member 15 and has one end fixed at an appropriate position on the main body. When attaching or detaching the platen, use the arrows C, D, and arrows so that it can be fixed in the three positions E.
It is possible to rotate in the E direction. In this case, the second
As shown in the figure, the length of the side plate member 15 is short so that it does not cover the mounting area of the front inserter 11 in any of the positions C, D, and E.

The scale mechanism 14 is fixed in the three positions C, D, and E in the following manner. First, the reason why it is fixed at position C is that the tip of the side plate member 15 is biased counterclockwise in FIG. (see figure) is fixed in contact with the outer peripheral surface of the platen collar 19. Next, D
The toggle spring 18 is fixed at the position of
2, the tip of the side plate member 15 is urged clockwise around the support shaft 3 in FIG.
(see FIG. 3) is fixed in contact with one end 21 of a slit 20 formed in the paper guide 8.
Next, the scale 17 is fixed at position E.
While pulling up the part, rotate clockwise around the support shaft 3 in FIG.
When the H section at the bottom of the notch 22 at the lower end of the slit 20 is brought into contact with the one end 21 of the slit 20, it is urged clockwise by the doggle spring 18 and fixed. In the above positions C and D, the side plate member 1
5 is pulled by the toggle spring 18, and the support shaft 3 comes into contact with the left wall of the elongated hole 16, but E
At the position, the side plate member 15 is pulled up against the toggle spring 18, and the support shaft 3 comes into contact with the right wall (located below) of the elongated hole 16.

In addition, when attaching and detaching the scale mechanism 14,
Since it is attached by simply fitting into the support shaft 3 at the elongated hole 16, by elastically deforming the side plate member 15 while appropriately shifting the side plate member 15 in the lateral direction using the elongate hole 16, the support shaft 3 can be attached. It can be easily attached and detached.

(6) Effects of the invention Since the invention is configured as described above, there is no need to remove the scale mechanism each time when installing a front inserter for supplying single sheets. Therefore, even when printing on a cut sheet using the front inserter, the scale 17 can be used and the printing position of characters etc. can be confirmed. In addition, since it can be fixed at each position C, D, and E when rotating the printer, replacing paper, and attaching/detaching the platen, the scale 17 can fully perform its role and improve operability and maintainability. can be improved.

[Brief explanation of the drawing]

FIG. 1 is an explanatory side view showing a scale mechanism of a conventional printer, FIG. 2 is an explanatory side view showing a scale mechanism of a printer according to the present invention, and FIG. 3 is a side view showing a side plate member. 2... Platen, 3... Support shaft, 8... Paper guide, 10... Tractor, 11... Front inserter, 12... Continuous paper supply path, 14... Scale mechanism, 15... Side plate member, 17 ...Scale, 18...Toggle spring.

Claims (1)

[Scope of utility model registration request] To indicate the printing position along the continuous paper supply path near the platen in a printer that has a continuous paper supply path around the platen and a mounting area for a front inserter for supplying single sheets near the top of the platen. The scale is made short so that the side plate member does not cover the mounting area of the front inserter, and is rotatable so that it can be fixed in three positions during printer operation, paper exchange, and platen attachment/detachment. Features printer scale mechanism.