JPS6140192B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a line printer using an endless type belt, and particularly to a platen that has a reduced suction area with the type belt.

In conventional line printers that drive an endless type belt into contact with a platen to perform printing operations, in order to prevent friction between the endless type belt and the platen, a method of reducing friction using a fluid lubricant is proposed. It is taken. However, since the contact surfaces between the type belt and the platen are both flat, when printing is performed using a printing hammer, a suction phenomenon occurs between both sides of the type belt and the platen. Furthermore, even if oil from the ribbon gets mixed in between the type belt and the platen, the same adsorption phenomenon as mentioned above will occur.
There was a problem that an excessive load was placed on the type belt drive motor.

The present invention was made in order to solve the above-mentioned problems, and for the purpose of reducing the unnecessary adhesion force between the type belt and the platen, a plurality of grooves are formed in the platen to reduce the contact area. This is what I did. Briefly, the present invention has a platen arranged on the back side of an endless type belt driven by a motor, a printing hammer placed oppositely in front with an ink ribbon interposed therebetween, and fluid lubrication between the type belt and the platen. A line printer using a type material, characterized in that a plurality of grooves are formed on the platen surface in contact with the endless type belt, excluding a portion facing the hammer, to reduce the suction area with the type belt. .

The line printer according to the present invention will be described in detail below with reference to the drawings.

The drawings show one embodiment of the present invention, in which a is a schematic configuration diagram of the printing section, b is a side sectional view of the main part of the printing section, and 1
1 is a platen, 2 is an endless type belt that is driven in contact with the platen 1, 3 is an ink ribbon, and 4 is an ink ribbon.
5 is a printing hammer that sandwiches and impacts the recording paper 4 and the ink ribbon 3 on a predetermined type; 6 is a type belt drive pulley that drives the endless type belt 2; 7 is Airarapuso.

In the printing mechanism configured as described above, the recording paper 4 is supplied to the printer printing section, and when desired symbols, characters, etc. are to be printed on the recording paper 4, the endless type belt 2 is moved by the type belt drive pulley 6 by a motor (not shown). The print hammer 5 is driven by a timing signal corresponding to the information, and the printing paper 4 is printed via the ink ribbon 3.
It is designed to print on.

b is a side cross-sectional view of the main part of the A-A section of the above-mentioned a, parts equivalent to those in the previous figure are indicated by the same reference numerals, and 1a and 1b are the contact surfaces 8a and 8b between the platen 1 and the endless type belt 2; A groove provided in the groove 1
In the conventional platen without a and 1b, an adhesion phenomenon occurs between the platen and the type belt 2, and this adsorption force places an excessive load on the drive motor (not shown) of the type belt 2, requiring the use of a motor with a large output. Since it was missing, I replaced the platen 1 and type belt 2.
By providing the grooves 1a and 1b on the contact surfaces 8a and 8b of the platen 1 and the type belt 2 after printing,
This reduces the adhesion force between the type belt 2 and the type belt 2, thereby making it easier to separate from the type belt 2, thereby making it possible to reduce the output of the motor of the type belt 2 (not shown). Of course, these grooves must be provided avoiding the printing position facing the hammer 5, and the gap between the grooves 1a must be provided at a position wider than the printed characters 2a.

Although the grooves 1a and 1b are shown to have a semicircular shape in this embodiment, they may have any other cross-sectional shape. A similar effect can be obtained by increasing the size.

Further, the grooves 1a and 1b may be formed in any direction such as parallel to, perpendicular to, or oblique to the moving direction of the type belt 2, but it is preferable that the grooves 1a and 1b are not provided in the position where the type characters 2a run.

As explained above, according to the line printer according to the present invention, by forming a plurality of grooves on the platen that contacts the type belt, the type belt 2 and the platen 1 can be quickly separated after printing. Since the printing speed is improved and the output of the drive motor for the type belt can be reduced, it is extremely advantageous when applied to a type belt type embossing printer.

[Brief explanation of the drawing]

The drawings show an embodiment of a line printer according to the present invention, in which a is a schematic configuration diagram of a printing section and b is a side sectional view of a main part of the printing section. 1: Platen, 2: Endless type belt,
3: ink ribbon, 4: recording paper, 5: printing hammer, 6: type belt drive pulley, 7: idler pulley, 1a, 1b: groove, 2a: type, 8a, 8
b: Contact surface.

Claims (1)

[Claims] 1. A type in which a platen is arranged on the back side of an endless type belt driven by a motor, a printing hammer is arranged facing in front with an ink ribbon interposed therebetween, and a fluid lubricant is used between the endless type belt and the platen. 1. A line printer, characterized in that a plurality of grooves are formed on the platen surface in contact with the endless type belt, excluding a portion facing the hammer, to reduce a suction area with the type belt.