JPS5821738Y2 - printing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printing device that prints on paper provided on a platen using a dot head.

BACKGROUND ART In recent years, in the field of information processing, which has been increasingly used, printing devices using a tod head, that is, tod printers, are increasingly being used as output machines for recording this information.

Incidentally, the tod printer prints on the paper by flying a wire built into the tod head using a magnet and hitting the paper placed on the platen with this wire via an ink ribbon. ing.

Also, it is difficult to fly the wire from the tod head too large due to the strength of the wire and the structure of driving the wire with a magnet, so it is recommended to place the tod head close to the paper, that is, the platen. ing.

However, if the platen and the dot head are close to each other, when the paper is inserted between them, the paper may get caught on the dot head and be damaged.

Therefore, conventionally, the running range of the tod head that can run along the platen is longer than the entire length of the platen, and when inserting paper, the tod head is shifted to a position where it does not face the platen.

As a result, the running path of the tod head becomes longer than necessary, resulting in a disadvantage that the device becomes larger.

Furthermore, even if the tod head is moved to a position where it does not face the platen when inserting paper, there is a member in front of the platen that constitutes a running path for the tod head to run, so that member may get in the way. Another drawback is that it is not easy to insert paper.

The present invention was developed based on the above-mentioned circumstances, and its purpose is to provide a platen supported on an apparatus main body, provide a support body with one end rotatably connected to the apparatus main body, and provide a support body with one end rotatably connected to the apparatus main body. A tod head is provided so as to be freely movable, and when paper is inserted, the supporting body is rotated, so that the paper can be easily inserted without making the running range of the tod head unnecessarily long. The purpose of the present invention is to provide a printing device that has the following features.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In the figure, 1 is the main body of the device. The device main body 1 consists of a base 2 and a pair of first support plates 3, 3 that stand on the base 2 in parallel and spaced apart.

A platen 4 is installed between these support plates 3, 3, and a motor 5 as a drive source is installed on one of the first support plates 3 with a rotating shaft 5a protruding outside of this support plate 3. A driving pulley 6 is fitted to this rotating shaft 5a.

Further, a mounting member 7 is fixed to the outer end of the first support plate 3 on which the motor 5 is provided, and a first pulley 8 and a second pulley 9 are mounted on the mounting member 7 with their centers shifted. It is also provided so as to be horizontally rotatable so as to be positioned in the vertical direction.

Further, a support body 10 is provided on the front side of the platen 4.

This support body 10 includes a sub-base 11 and this sub-base 1.
1 and a pair of second support plates 12, 12 erected in correspondence with the pair of first support plates 3, 3 of the main body 1.

A connecting portion 13 is provided protruding from one end of the support 10, that is, an end of the second supporting plate 12 corresponding to the first supporting plate 3 provided with the motor 5, and this connecting portion 13 is connected to the main body. It is rotatably connected to a shaft 14 erected on the base 2 of 1.

Note that the shaft 14 is connected to a first support plate 3 provided on the first support plate 3 of the main body 1. It is provided at the center of a straight line connecting the center points of the second pulleys 8 and 9 projected onto the base 2.

Further, two rails 15.15 are installed between the pair of second support plates 12.12 to form a running path 16 having approximately the same length as the platen 4.

A carriage 18 is provided on the traveling path 16 so as to be movable by a plurality of rollers 17.

A tod head 19 is provided on the upper surface of the carriage 18 with its tip close to the front surface of the platen 4, and a movable pulley 20 is rotatably provided on the lower surface.

In the figure, reference numeral 19a denotes an ink ribbon that is fed out from a cassette (not shown) as the carriage 18 moves.

Furthermore, support members 21 and 21 are provided on the outer surfaces of the pair of second support plates 12 and 12, respectively.
．． 21 is provided with a third pulley 22 and a fourth pulley 23, each of which is vertically rotatable.

The upper end of an arm 24 whose midway portion is pivotally connected to the support member 21 is connected to the shaft 23 a that supports the fourth pulley 23 .

A spring 25 is stretched between the lower end of the arm 24 and the sub-base 11, and the spring 25 causes the fourth pulley 23 to move to the second support plate 12 via the arm 24.
It is biased in the direction away from the

Further, a long drive wire 26 is provided around the drive pulley 6, which is fitted onto the rotating shaft 5a of the motor 5, so as to be wound around the drive pulley 6 approximately at its outermost portion.

One end of the drive wire 26 extending from the drive pulley 6 is connected to the first pulley 8, movable pulley 20, and fourth pulley 23.
and a third pulley 22, and the end thereof is connected to one side of the carriage 18.

Further, the other end side of the drive wire 26 is hooked onto the second pulley 9 and the fourth pulley 23, and the end thereof is connected to the other side of the carriage 18.

Accordingly, as the motor 5 rotates, the carriage 18, ie, the tod head 19, travels on the travel path 16 along the platen 4 via the drive wire 26.

Further, a support body 10 whose one end is rotatably connected to the main body 1
A pin 27 is erected on the sub-base 11 at the other end.

A lever 2 is attached to the base 2 of the main body 1 corresponding to this pin 27.
8 is rotatably provided, and this lever 28 is provided with a support 1.
An engaging piece 28a is provided which engages with the pin 27 to hold the support body 10 when the support body 10 is joined to the body 1.

Although not shown, the main body 1 is provided with a paper feed tractor located above the platen 4 for feeding a paper p inserted between the platen 4 and the tod head 19 as described later.

Further, reference numeral 29 in the figure is a copy control knob for eccentrically moving the platen 4 to change the facing gap between the tod head 19 and the platen 4 to adjust the print density.

In the above configuration, in order to insert the paper p between the platen 4 and the tod head 19, first rotate the lever 28 provided on the main body 1 as shown in FIG. 28 a is disengaged from the pin 27 to make the support 10 held on the main body 1 rotatable by the lever 28, and then the support 10 is connected to the main body 1 in the direction away from the main body 1. Rotate the part using it as a fulcrum.

Then, the support 10 is separated from the main body 1 and the support 10 is removed from the front side of the platen 4.
Paper p is provided at .

Therefore, when the paper p is placed on the platen 4, the tod head 19 and the running path 16 do not get in the way, so the paper p can be easily mounted.

After the paper p is attached in this way, the support 10 is rotated in the opposite direction to the previous direction to join it to the main body 1, and the engagement piece 28a of the lever 28 is engaged with the pin 27. Ba,
This printing device can be set to a printable state.

In addition, when mounting the paper p on the platen 4, the support 1
0 is a first pulley 8 and a second pulley 9 provided on the main body.
Since it rotates using the center point of the straight line connecting the centers of the two as a fulcrum, these first. Support 10 via second pulley 8°9
There is no possibility that the drive wire 26 led out to the carriage 18 and connected to the carriage 18 will become loose and come off from each pulley by rotating the support body 10.

Note that the present invention is not limited to the above-mentioned embodiment; for example, the drive mechanism for driving the carriage may not use a drive wire, but may be driven by another drive mechanism such as a belt drive.

As described above, the present invention is such that the platen is supported and provided on the main body of the device, a support body is provided with one end rotatably connected to the main body of the device, and the tod head is provided on this support body so as to be freely movable. Therefore, when the paper is to be mounted on the platen, the support body can be rotated to separate the tod head from the platen, so that the paper can be easily mounted.

Furthermore, when loading paper as in the past, there is no need to make the running path of the tod head longer than the platen in order to shift the tod head to a position where it does not face the platen, which is a practical advantage such as making the device more compact. be effective.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a plan view, FIG. 2 is a plan view showing a state in which the support body is rotated, and FIG.
The figure is a perspective view showing a connecting portion of the support body to the main body. 1... Device main body, 4... Platen, 1
0...Support body, 13...Connection part, 14
...Axis, 16...Travel path, 19...
... Todd Head, p ... paper.

Claims (1)

[Scope of utility model registration request] In a serial dot printer that prints desired data on paper provided on the platen by moving a dot head along the platen by wire drive, the printer has a base and a pair of supports that stand parallel to each other and spaced apart from each other on the base. The device body is composed of a plate and a platen is mounted on the support plate, and the device body is connected to the device body through wires and two stages of wire pulleys, which are provided on the support plate via attachment members and whose centers are shifted at different levels. The centers of each of the wire pulleys are projected onto the base, a one-point fulcrum for opening and closing is provided at the center of a straight line connecting the points, and one end is rotatably connected to the device main body. What is claimed is: 1. A printing device characterized in that the dot head is movably provided on the support, and can be opened and closed from the main body of the device.