JP2897412B2 - Printing mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a type wheel in which a type sheet or a type belt formed of a rubber material or an elastic resin material is wound around a cylindrical base. And a printing mechanism of the printer having the same.

[Prior Art] As shown in FIG. 4 (a), conventionally, a type stand 1a and a type 1b are formed on a type sheet or a type belt 1, and
Regardless of the character type and symbol type, the type 1b has a uniform height L.
Was formed.

[Problems to be Solved by the Invention] However, a type sheet or a type belt having the type described above has the following problems.

Due to the reduction in size and weight, the printing mechanism has been inevitably made thinner and lower in hardness for the type sheet or type belt in order to reduce the size and power consumption.

Therefore, as shown in FIG. 5 (a), the type 1b composed of at least two or more blocks in the direction A of rotation of the type ring due to the contact load with the inking roller 3 during inking. , It is easy to cause inking failure by falling down.

Further, as shown in FIG. 5 (b), at the time of printing, the printed type 1b pushed out in the B direction by the printing hammer 4a is
Of the print sheet or the print belt 1 due to the deformation due to the tension, a part of the print 1b may not be able to contact the recording paper 6 on the platen 5.

These phenomena result in printing defects, which are serious drawbacks in printing quality.

Therefore, the present invention is to solve such a problem, the purpose of which is to improve and stabilize the printing quality of the printing mechanism,
The present invention is to stabilize the quality of parts of a type sheet or a type belt.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the type ring of the present invention is a type formed on a type sheet or a type belt, and at least two or more in the direction of the type ring rotation at the time of printing. The character or the symbol composed of the above blocks is characterized in that the blocks are joined by ribs.

[Function] By forming a type sheet or a type belt having the type as described above, each block of the type composed of at least two or more blocks is reinforced in the rotation direction of the type ring, and the inking and printing are performed. It is possible to prevent the type from falling down at the time.

Example An example of the present invention will be described below with reference to the drawings.

In FIG. 3, a print sheet or print belt 1 is mounted on a base 2.
Is wound, and the inking roller 3 is in contact with the sheet or the belt 1 at a certain pressure. A print drive unit 4 is provided inside the base 2.

When the printing type is selected, the inking roller 3 rotates in the direction C in synchronization with the rotation of the base 2 in the direction A, and the ink is transferred to the surface of the type 1b formed on the sheet or the belt 1. At this time, as shown in FIG. 1, a type 1b composed of at least two or more blocks in the type wheel rotation direction.
By using the ribs 1d between the blocks, it is possible to prevent the type from falling due to the contact load with the inking roller 3 as shown in FIG. it can.

Next, at the time of printing, when the desired type comes to the printing position, the type wheel is stopped and the print driving unit 4 is energized. At this time, as shown in FIG.
4a presses the type pushing protrusion 1c in the B direction, and presses the type 1b against the recording paper on the platen 5 to perform printing. As described above, the type 1b in which each block is joined by the rib 1d is
It is possible to prevent the type from falling down when the type stand 1a is deformed.

[Effects of the Invention] As described above, according to the present invention, a simple configuration in which each block of a type composed of at least two or more blocks is joined with a rib in the direction of rotation of the type ring. By the method, the inking of the type and, during printing, it is possible to prevent printing chipping due to type collapse, and the shape of the type sheet or type belt at the time of molding is stable,
The effect of improving the printing quality and the part quality, such as improved mold release, can be obtained.

[Brief description of the drawings]

1 (a) and 1 (b) are a top view and a side view of a print portion of a print sheet or print belt according to the present invention. FIG. 2 (a) is a side view showing the state of contact with an inking roller when inking a type sheet or type belt according to the present invention. FIG. 2 (b) is a side view showing a printed state of printing on recording paper when printing a printed sheet or printed belt according to the present invention. FIG. 3 is a side view showing an outline of a printing mechanism. FIGS. 4A and 4B are a top view and a side view of a type portion of a type sheet or type belt according to a conventional example. FIG. 5 (a) is a side view showing a state of contact with an inking roller during inking of a conventional type sheet or type belt. FIG. 5 (b) is a side view showing a printed state of printing on recording paper when printing on a printed sheet or printed belt according to a conventional example. 1: Type sheet or type belt 1a: Type stand 1b: Type 1c: Type extrusion protrusion 1d: Rib 2: Base 3: Inking roller 4: Print driver 4a: Print hammer 5: Platen 6: Recording paper

Claims (1)

(57) [Claims] 1. A printing mechanism having a type wheel in which a type sheet or a type belt formed of a rubber material or an elastic resin material is wound around a cylindrical base. A character or symbol composed of at least two blocks, the blocks being joined by ribs in the direction of rotation of the type ring at the time of printing.