JP3154922B2 - Line printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line printer provided with a printing unit that can be pulled out of a housing.

[0002]

2. Description of the Related Art Conventionally, this type of line printer is applied to a ticket issuing apparatus as shown in FIGS. 5 and 6, for example.
In this ticket issuing device, a printing unit 2 is provided in a housing 1 so as to be able to be pulled out from the front. More specifically, two guide rails 3 are provided on the bottom of the housing in the front and rear directions, and the printing unit 2 is slidably mounted on these guide rails 3.

[0003] The printing unit 2 transports a paper storage unit 4 for storing a printing medium (in this case, roll paper or the like) behind the paper unit, and an end of the paper drawn from the paper storage unit 4 to the roll paper. The printing unit 5 includes a printing unit 5 for printing, a cutting unit 6 for cutting paper printed by the printing unit 5, and a ticket issuing unit 7 in front of the printing unit 2 for cutting and issuing as a ticket at the cutting unit.

A lid 8 is pivotally supported on one upper edge of the main body of the printing unit so that one end of the lid 8 can be freely opened in the direction of the arrow shown in FIG. A line head 10 in which printing elements are arranged in a line is mounted inside the lid 8. An open end of the lid 8 is provided with a protruding portion 8a protruding to the side thereof, and the protruding portion 8a is hooked on a hook portion 9 attached to a side surface of the printing unit main body. The hook 9 is provided with a lever 9 a for releasing the hooked state of the projection 8 a of the lid 8.

In such an apparatus, when a roll paper is fed or when a paper jam occurs in the print unit 5 and the paper that caused the jam is removed, the print unit 2 is first pulled out of the housing 1, and By operating the lever 9a,
The hooked state of the projection 8a of the hook 9 is released. Then, the lid 8 is opened in the direction of the solid arrow shown in FIG. Then, the roll paper is fed, the cover 8 is closed, and the printing unit 2 is pushed into the housing 1 and stored.

[0006]

However, in such a case, the printing unit 2 can slide on the housing 1 irrespective of the open / closed state of the lid 8, so that the printing unit 2 is erroneously made. There is a possibility that the printing unit 2 may be pushed into the housing 1 while the printer is open. In such a case, the edge of the entrance of the housing 1 may collide with the lid 8 and the lid 8 may be damaged.

Further, even if the cover 8 is not damaged,
If the paper is deformed or the mounting position is deviated, the distance between the line head 10 mounted on the lid 8 and the printing paper is deviated, and the quality of the printing result may not be maintained. Specifically, for example, when a thermal head in which heating elements are arranged in one line is used as the line head 10,
When the distance between the printing medium and the heating element changes, a pressure difference is generated, so that printing unevenness occurs.

Accordingly, an object of the present invention is to provide a line printer which can prevent the printing unit from moving into the housing when the cover is opened.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a line printer capable of pulling out a printing unit provided with a line head and a printing medium accommodating portion from a housing along a guide rail. Pivoted and lie inside
A lid body to which a head is attached, an oscillating body having an intermediate portion pivotally supported near a guide plate slidably provided along the guide rail, and one end of which is urged downward when the lid body is in an open state, When the lid extends from the lid to the rocking body, and when the lid is closed, the upper end is pressed by its open end, the other end of the rocking body is pushed down at the lower end to resist the biasing force. And a stopper release rod that makes it substantially horizontal, and the housing is provided with a stopper plate near the guide rail near the entrance in the housing,
When one end of the oscillating body is urged downward, the stopper plate is prevented from passing through the oscillating body, and the lid is attached to the housing.
Prevents the printing unit pulled out of the housing from being guided into the housing before the collision, and allows the printing unit pulled out of the housing to be inserted into the housing when the oscillator is in a substantially horizontal state. Height.

[0010]

In the present invention having such a configuration, when the lid is closed, the upper end of the stopper release rod is pressed by the open end, and the other end of the rocking body is pushed down by the lower end. The rocking body is made substantially horizontal against the urging force. Accordingly, when the printing unit is housed in the housing along the guide rail, the swinging body can pass above the stopper plate, so that the printing unit can be inserted into the housing.

On the other hand, when the lid is in the open state,
Since one end of the oscillating body is urged downward, even if the printing unit is to be housed in the housing along the guide rail, the printing plate is prevented from being inserted into the housing by the stopper plate. .

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a ticket issuing apparatus will be described below with reference to the drawings. The external configuration of the apparatus according to this embodiment is the same as that shown in FIG. 5, and the same parts as those shown in FIG.

FIG. 1 is an external perspective view showing the structure of the present embodiment. The difference from FIG. 6 is that a stopper mechanism is provided on the side of the printing unit 5 in conjunction with opening and closing of the lid 8. Specifically, a main base 21 having a guide plate 20 for bending a flat plate and sliding on a guide rail of a housing is attached below the printing unit 5 as shown in FIG. Base extension 21a extending from the side of main base 21
The extension portion 5a formed by extending from the side portion of the printing portion 5 abuts.

On one side of the base extension 21a and the extension 5a of the printing unit 5, holes 21b, 5b penetrating both are formed. A stopper bar 22 is inserted into the holes 21b and 5b in the vertical direction.

An oscillating body 23 is provided below the stopper bar 22.
Is provided. As shown in FIG. 3, an upper surface of a stopper bracket 23a formed by bending both ends downward is attached to the extending portion 5a of the printing unit 5, as shown in FIG. A swing stopper 23c is pivotally supported on a side surface of the stopper bracket 23a via a pivot shaft 23b. An urging spring 23d is inserted into the pivot shaft 23b, and the urging spring 23d is
c is urged in a direction of pushing down one end in the direction of the solid arrow shown in FIG.

On the upper surface of the stopper bracket 23a, the base extending portion 21a and the hole 2 of the extending portion 5a of the printing portion 5 are formed.
A hole 23e is provided at a position facing 1b and 5b. The lower end of the stopper rod 22 is connected to the hole 21b, 5.
The other end of the swing stopper 23c is pushed through the b and 23e against the urging spring 23d.

When the lid 8 is open, the upper end of the stopper rod 22 is free.
3 is pushed up by the other end of the swing stopper 23c by the urging spring 23d, and projects from the upper end of the printing unit 5.
At this time, one end of the swing stopper 23c is connected to the biasing spring 23d.
And is pushed down.

On the other hand, when the lid 8 is closed, the upper end of the stopper rod 22 is pushed down by the open end of the lid 8, and the lower end of the stopper rod 22 is connected to the other end of the swing stopper 23c. Is pressed down against the urging spring 23d.
As a result, one end of the swing stopper 23c rises, and the swing stopper 23c becomes substantially parallel to the guide rail 3.

A stopper plate 31 is mounted near the entrance in the housing 1 near the side of one of the rails 3. The height of the stopper plate 31 passes when one end of the swing stopper 23c is substantially parallel to the guide rail 3, and when the one end of the swing stopper 23c is pushed down, the height of the stopper plate 31 It is only about contact.

The mounting position of the swing stopper 23c and the stopper plate 31 in the rail direction is such that the contact point between the one end of the swing stopper 23c and the stopper plate 31 is behind the edge of the lid 8. To determine.

In the present embodiment having such a configuration, when the roll paper is stored in the paper storage unit 4 and set, or when a paper jam occurs in the printing unit 5, the paper that caused the jam is removed. First, the printing unit 2 is pulled out of the housing 1 in the direction of the solid arrow shown in FIG.

Subsequently, the hooked state of the projection 8a of the hook 9 is released by operating the lever 9a. Then, the open end of the lid 8 moves in the direction of the solid arrow shown in FIG. 4B, and the lid 8 is opened as shown in FIG.

Then, since the upper end of the stopper rod 22 is free, one end of the swing stopper 23c of the swing body 23 is urged by an urging spring 23d in the direction of the dotted arrow shown in FIG. The stopper bar 22 rises in the direction of the solid arrow.

At this time, for example, if the printing unit 2 is to be pushed into the housing 1 without closing the lid 8, one end of the swing stopper 23c is blocked by the stopper plate 31,
As a result, the printing unit 2 cannot be inserted into the housing 1. Therefore, before the lid 8 collides with the housing 1, the insertion of the printing unit 2 can be prevented by the swing stopper 23 c and the stopper plate 31.

Accordingly, it is possible to prevent the lid 8 from being damaged or deformed due to collision with the housing 1. Thereby, the lid 8
The quality of the printing result can be maintained without deviation of the distance between the line head 10 attached to the printer and the printing paper.

After the lid 8 is opened and processing such as feeding of roll paper and discharging of paper causing a jam is performed, the lid 8 is closed, and as shown in FIG. As shown, the stopper bar 22 is pushed down by the open end of the lid 8, and pushes down the other end of the swing stopper 23c against the urging spring 23d of the swing body 23. As a result, the swing stopper 23c becomes substantially horizontal. Thus, when the printing unit 2 is pushed into the housing 1, the swing stopper 23 c passes above the stopper plate 31, and the printing unit 2 can be stored in the housing 1.

In this embodiment, the lid 8 of the printing unit 2 pivotally supports the upper edge of one side of the printing unit main body in order to easily replace the roll paper. When the printing unit 2 is housed in the housing when the lid 8 is opened and closed, if the lid 8 is opened, the collision from the side most damaged by the collision will occur. This is particularly effective because it can prevent the

Further, the present invention may be applied to a device in which the lid 8 of the printing unit 2 is pivotally supported on the front or rear upper edge. Also in this case, it is possible to prevent breakage or the like due to a collision at the time of storage in the housing 1.

Further, in this embodiment, the case where the line head 10 is provided on the lid 8 has been described, but the line head 10 may be constituted by any of a thermal head, an ink jet head, an impact head and the like. .

[0030]

As described above in detail, according to the present invention, it is possible to provide a line printer which can prevent the printing unit from moving into the housing when the cover is opened.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the appearance of an embodiment of the present invention.

FIG. 2 is an assembly view of the printing unit shown in FIG.

FIG. 3 is an assembly view of the oscillator shown in FIG. 2;

FIG. 4 is a view for explaining the operation in the embodiment.

FIG. 5 is an overall perspective view showing an external configuration of a conventional line printer.

FIG. 6 is a diagram illustrating a configuration of a conventional line printer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Housing | casing 2 ... Printing unit 3 ... Guide rail 4 ... Paper storage part (printing medium storage part) 8 ... Lid body 10 ... Line head 20 ... Guide plate 22 ... Stopper bar (stopper release rod body) 23 ... Swinging body 31 … Stopper plate (stopper plate)

Claims (1)

(57) [Claims] 1. A line printer capable of pulling out a printing unit having a line head and a printing medium accommodating section from a housing along a guide rail, wherein the printing unit has one end pivotally supported to be openable and closable , and Attach line head
A slidable lid, an oscillating body having an intermediate portion pivotally supported near a guide plate slidably provided along the guide rail, and having one end biased downward when the lid is in an open state; When the lid is extended from the lid to the rocking body and the upper end is pressed at the open end when closing the lid, the other end of the rocking body is pushed down at the lower end to lower the rocking body. A stopper release rod that is made substantially horizontal against the urging force, wherein the housing is provided with a stopper plate near the guide rail near an entrance in the housing; When one end of the printer is urged downward, the printing unit pulled out of the housing is guided into the housing before the lid collides with the housing by preventing the swinging body from passing therethrough. And when the oscillator is in a substantially horizontal state, Line printer the printing units withdrawn from Kikatami body, characterized in that the height can be inserted into the housing.