JPH03213373A - Printer - Google Patents

Abstract

PURPOSE:To stably draw out roll paper with reduced power and to use a printer in a hanging-up-on-the wall state by drawing paper in a direction almost vertical from the outer periphery of the roll paper to guide the same to a platen by a guide member and moving the platen to the position opening the upper part of a receiving part along with the guide member. CONSTITUTION:The platen 15 positioned in opposed relation to a printing head 11 is provided between the upper ends of a pair of left and right support members 17a, 17b supported on both left and right sides 10b of a printer main body 10 in a revolvable menner by a shaft 16 to be supported by the support members 17a, 17b. A pin 21 is released by the revolution of a lock lever 22 to revolve the support members 17a, 17b in a clockwise direction. The under surface of the printing head 11 is opened to charge the roll paper 13 in a receiving part 14 from the front of a printer and the paper drawn out from the outer periphery of the roll paper 13 is raised to the leading end of the guide member 18 and the platen 15 by a roller 19.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printer that uses roll paper, and particularly to a printer suitable for cash registers, PO8 terminal devices, and the like.

[Prior Art] Conventionally, this type of printer has a print head that moves from the front to the rear.
Generally, a platen and roll paper are arranged almost horizontally. In response to the requirement to reduce the installation floor space and the requirement to use the printer on a wall, the inventors considered arranging the print head, platen, and roll paper vertically, as shown in FIG.

That is, the print head 1 is placed facing downward, and the platen 2 is placed oppositely underneath. A storage section 3 with an upward opening is placed below them. The paper pulled out from the roll paper 4 in the storage section 3 is guided to the platen 2 through the guide member 5 and between the color rollers 6 and 7.

Each time one line is printed on the paper, the motor 8 rotates to drive the rollers 6 and 7 to feed the paper by a predetermined amount.

[Problem to be Solved by the Invention] In the above structure, when loading the roll paper 4, in order to easily insert the leading edge of the paper between the rollers 6.7, the front surface of the printer is (right side in Figure 4). The paper is pulled out from the outer periphery of the roll paper 4 towards the front of the printer, bent at the front end of the guide member 5 and guided to the rollers 6.7.

Therefore, the force F that pulls the paper by the rollers 6.7 generates a large force that pushes the roll paper 4 forward of the printer, and pushes the roll paper 4 against the front wall 3a of the storage section 3. Therefore, there is a problem that not only a large force is required to pull the paper, but also that the paper feeding operation becomes unstable.

The present invention solves the above-mentioned drawbacks and provides a printer that can stably pull out roll paper with a small amount of power, requires a small installation floor space, and can be used even when mounted on a wall.

[Means for Solving the Problems] The printer of the present invention includes an upward-opening storage section that stores roll paper in contact with its outer periphery, a platen located above the storage section, and a printing unit facing the platen. a head, a guide member that pulls out and guides the paper from the outer periphery of the roll paper in a substantially vertical direction from the storage section to the platen, a position where the platen faces the print head, and the storage section together with the guide member. It consists of a support member movably supported in a position where the upper side is opened and a support member movably supported.

[Function] As in the above configuration, by arranging the roll paper storage section, the platen, and the print head one above the other, the installation floor area is reduced, and the apparatus can be used even when it is mounted on a wall.

In addition, because the guide member pulls out the paper almost vertically from the outer circumference of the roll paper and guides it to the platen, the force that pulls out the paper is less likely to actively push out the roll paper, so there is less resistance when pulling out the paper. , stable paper feeding is possible with a small amount of power.

Furthermore, since the paper is not bent after being pulled out from the outer periphery of the roll toward the front of the printer, as in the conventional method, it becomes difficult to insert the leading edge of the paper, which makes it difficult to insert the paper from the platen. This problem can be solved by moving the storage part together with the guide member to a position where the upper part of the storage part is opened. In other words, the roll paper is loaded into the storage unit with the platen and guide member open, and when the platen and guide member are closed, the leading edge of the paper that has been unwound from the roll paper in advance is automatically positioned between the platen and the print head. It is possible,
Paper can be loaded more easily and quickly than before.

[Embodiment] The printer main body 10 includes a cover portion 12 that accommodates a print head 11 above, and a storage section 14 that accommodates a roll paper 13 below.

The storage section 14 includes a rear wall 10a (the left side is the rear surface and the right side is the front surface in FIG. 1) of the printer main body 10, a bottom wall 14a extending horizontally from the lower end of the rear wall 10a, and a front wall rising from the front end of the bottom wall. 14b is formed into a box shape, and the upper surface is covered with part 1.
It opens toward the space between 2 and 2. The space is also open toward the front of the printer.

The platen 15 facing the print head 11 is supported by a pair of left and right support members 17g, 17 rotatably supported by a shaft 16 on both left and right sides 10b (FIG. 2) of the printer main body 10.
It is supported by a bridge between the upper ends of b. A guide member 18 extends from one side of the platen 15 toward the rear wall 10a of the printer body. A roller 19 is arranged on the other side of the platen 15, and the roller 19 supports the supporting members 17a and 1.
It is driven by a motor supported by 7b.

The support members 17a and 17b are biased by a spring 20 (FIG. 2) to rotate the platen 15 in the direction in which the platen 15 comes out to the front of the printer (clockwise in the figure), and a lock lever 22 is engaged with a pin 21 on the side thereof. As a result, the platen 15 is held in a position facing the print head 11.

The lock lever 22 is connected to a pair of vertical walls 2 of the printer main body 10.
3 (standing apart from each other on the side of the side wall 10b), there are a pair of left and right supports rotatably supported by a shaft 24. Further, each of the double-ended levers 22 is biased by a spring 25 to rotate in the direction of engaging the bin 21.

The driven roller 26 that comes into contact with the roller 19 has its shaft portion 26
It is supported by a standing wall 23 and a lock lever 22 at both ends of a. The vertical wall 23 has the shaft portion 2 in the horizontal long hole 27.
6a is inserted therethrough, and the shaft portion 26a is inserted through an elongated hole 28 in which the lock lever 22 is inclined downwardly but is bent at the front end.

When the lock lever 22 is engaged with the pin 21, the shaft portion 26a is located at the rear end of each elongated hole 27, 28 due to the bias of the spring 29, and the driven roller 26 is in contact with the roller 19. When the lock lever 22 is rotated counterclockwise in FIG. 2 around the shaft 24 against the spring 25, the shaft portion 26
A slides forward along the long hole 27 due to the cam action of the inclined portion of the long hole 28, and the driven roller 26 separates from the roller 19. As a result, the driven roller 26 is moved to the supporting member 17a,]
7b, and does not interfere with the later-described rotation of the support member.

The pin 21 is released by the rotation of the cock lever 22, and the support members 17a and 17b are moved around the shaft 1 by the action of the spring 20.
6 in a clockwise direction in FIG. 2, and is stopped by a stopper pin 30.

As a result, as shown in FIG. 3, the platen 15 and the guide member 18 come out from above the storage section 14 to the front of the printer. Then, the lower surface of the print head 11 is opened. In this state, the roll paper 13 is put into the storage section 14 from the front of the printer.

When closing the support members 17a and 17b, if the leading edge of the paper, which has been unwound in advance from the roll paper, is placed so as to cover the guide member 18 and the platen 15, when the platen 15 faces the print head 11, the paper will be placed on the platen. 15 and the print head 11. Of course, in this state, the lock lever 22 locks and holds the support members 17a and 17b, and the driven roller 26 returns to grip the paper between it and the roller 19.

As the roll paper is loaded as described above, as shown in FIG. 15 by rollers 19. The force F for pulling out the paper from the roll paper 13 varies depending on the diameter of the roll paper, but generates only a small component force in the direction of pushing the roll paper forward of the printer. Therefore, the roll paper 13 rotates within the storage portion 14 while lightly touching the outer periphery, and stable paper feeding can be achieved with a small amount of power.

Note that the printer described above can also be used with the rear wall 10a facing down.

[Effects of the Invention] As described above, this invention provides a storage section for roll paper, a platen,
By arranging the print heads one above the other, the installation floor area can be reduced, and it can be used even when mounted on a wall.

In addition, since the guide member pulls out the paper almost vertically from the outer circumference of the roll paper and guides it to the platen, the force that pulls out the paper is less likely to actively push the roll paper, thus reducing the resistance when pulling out the paper. This makes it possible to feed the paper stably with a small amount of power.

Furthermore, by putting the roll paper into the storage unit with the platen and guide member open, the leading edge of the paper can be positioned between the platen and the print head when the platen and guide member are closed, which is even better than before. It has excellent effects such as being able to load paper easily and quickly.

[Brief explanation of drawings]

Figure 1 is a side sectional view of a printer embodying this invention;
The figure is the same side view, Figure 3 is an explanatory diagram of the operating state of Figure 2, and Figure 4 is the same side view.
The figure is a side sectional view of a printer that was originally conceived by the inventor of this invention. In the figure, 11 is a print head, 13 is a roll paper, 14 is a storage section, 15 is a platen, 17a, 17b are support members, 18
is a guide member.

Claims (1)

[Claims] 1. A storage section with an upward opening for storing roll paper in contact with its outer periphery; a platen located above the storage section; a print head facing the platen; a guide member that pulls out and guides the paper from the outer periphery of the roll paper in a substantially vertical direction to the platen; a position where the platen faces the print head; and a position where the guide member and the upper part of the storage section are opened; a support member movably supporting the printer.