JPH01229668A - Printer - Google Patents

Abstract

PURPOSE:To enable paper to be mounted even though an upper cover is not released, by a method wherein a paper feed tractor and a pin wheel are exposed outside the upper cover at a rear of an apparatus and besides the paper feed tractor is made to pivot centering an end part on a platen side of the paper feed tractor. CONSTITUTION:A reference position of a paper feed tractor 19 is determined conforming to a printing start position of continuous paper 4 to be used and besides, a pin hole 23 on another side is moved to be positioned conforming to a width of the continuous paper 4 to be used. By making the paper feed tractor 19 pivot upward centering an end part on a platen 5 side, a second tractor shaft 14 is lifted to be held conforming to grooves of bearing parts 2a, 3d, and an opening is provided so that the continuous paper 4 can be inserted. Then, the continuous paper 4 is inserted from the opened clearance, and the second tractor shaft 14 is lowered so that a hole 4a on one side edge of the continuous paper 4 is engaged with a pin 20 of a tractor belt 20. Then, since the continuous paper 4 becomes parallel to the paper feed tractor 19, a pin 23a is engaged with the hole 4a on the other side of the continuous paper 4.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an impact method using a printing wire and type, etc.
Alternatively, the present invention relates to a printing device equipped with a non-impact printing head using heat-sensitive, inkjet, electric discharge, etc., and a paper feeding mechanism that feeds recording paper from the rear of the device to a printing section.

[Conventional technology]

Such a printing device includes a platen that wraps and supports paper such as single sheets or continuous paper for printing, and is placed on the front side of the platen, and prints on the paper wrapped around the platen. A tractor belt is provided on the rear side of the platen and has a plurality of pins protruding from the surface of the endless belt at predetermined intervals to engage holes provided on both side edges of the paper. The paper feed mechanism is formed by passing the paper between two pulleys.

Then, the paper to be printed is inserted from the rear of this device, and the paper is driven toward the platen by a paper feed mechanism, so that it is fed between the platen and the print head and printed. For example, Japanese Patent Application Laid-Open No. 60-20197
6 or Utility Model Application Publication No. 61-85450.

[Problems to be Solved by the Invention] However, according to the above-mentioned conventional technology, the power supply section and circuit board for driving the various mechanisms of the device, and the control system such as the control section for controlling these functions are If these control systems are placed in front of the platen, the volume of the device on the front side of the platen will increase, and the printing section will be retracted from the operator's position. When trying to check the printed content, etc.,
Because the printing section was set back, it was not only difficult to see, but also difficult to perform operations such as inserting and removing paper.

In addition, if the control system is placed behind the platen, a paper feeding mechanism for feeding the recording paper to the printing section is provided behind the platen, so additional space for placing the control system is required. There is a problem in that the device becomes larger because it has to be provided.

Furthermore, according to the conventional printing device as described above, paper cannot be loaded without releasing the upper cover of the device, which complicates the operation when loading paper and requires releasing the upper cover. Therefore, the upper cover has to be formed by dividing into several parts, and therefore, when assembled, these parts are connected, resulting in a problem that the noise level increases when the apparatus is in operation.

Therefore, the present invention was made to solve the above-mentioned problems, and by not disposing the control system mechanism in front of the platen, it is possible to control the 6i UE operation of the printed content without interfering with the operator's 6i UE operation. ? Even if the 11-series mechanism is placed at the rear of the platen, it does not increase the size of the device, and by making it possible to load paper without opening the upper cover, it reduces noise (and improves operability). The purpose of this invention is to provide a printing device.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention provides a paper feed tractor comprising an endless belt provided with a bottle that engages with a hole in one side edge of a paper sheet, and two pulleys around which the endless belt is wound; A paper feeding mechanism is constituted by a bin wheel having a bin that engages with a hole at the other end of the paper, and the paper feeding tractor and pin wheel are exposed outside the upper cover at the rear of the device,
It is designed to be able to rotate around the end of the paper feed tractor on the platen side.

[Operation] With the above-described configuration, the rear end of the paper feed tractor and pinwheel is rotated upward around the end of the paper feed tractor on the platen side, thereby pushing up the paper feed tractor and opening the paper into which paper can be inserted. Insert the sheet of paper from the back of the device, engage the hole on one edge of the sheet with the bin formed on the endless tractor belt, and align the sheet by engaging the hole on the other side with the pin wheel. After that, close the paper feed tractor and set the paper.

After this, the motor is driven to rotate the platen, and this rotation is transmitted to rotate the paper feed tractor to move the paper towards the platen.The paper is fed between the platen and the print head, and is then driven by the print head. Printing is performed.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a perspective view of a printing device according to an embodiment of the present invention as seen from the rear, Fig. 2 is a schematic perspective view of the mechanical part of the printing device shown in Fig. 1 with the upper cover removed, and Fig. 3 FIG. 2 is a schematic side view showing a mechanical part of the printing device shown in FIGS. 1 and 2. FIG.

First, to explain the appearance with reference to FIG. 1, the printing device 1
The housing consists of a lower cover 2 that also functions as a base frame, and an upper cover 3 that is integrally molded to cover the rear upper part of various mechanical parts installed on this lower cover 2. has an insertion slot 3a on its top surface for inserting cut sheets such as slips, and a paper ejection port 63b for ejecting continuous sheets or cut sheets printed in the printing device 1 to the outside of the device. It is provided.

When the double force bars 2 and 3 are assembled, a continuous paper insertion slot 4a for inserting the continuous paper 4 for recording is formed at the lower part of the rear surface (the front side in the drawing) of the printing device 1. It becomes.

Further, on the printing position reference side of this printing device 1, which is the left side when viewed from the front side in this embodiment, a paper feed tractor, which will be described later, runs from an opening 3c formed at the left end of the rear surface of the amber cover 3 toward the rear of the device. It is arranged so as to protrude from the cover 3 to the outside.

Next, the mechanical section of the printing device 1 will be explained with reference to FIGS. 2 and 3.

5 is a cylindrical platen, and this platen 5 is rotatably supported on left and right side frames 6a, 6b by shafts 5a, 5b protruding from both ends thereof, and is driven by the illustrated Senu motor. Axis 5 on the printing start reference side
A platen gear 7 is locked at the tip of a.

Reference numeral 8 indicates a print head for printing, and reference numeral 9 indicates a carriage on which this print head 8 is mounted. supported2
It is supported so as to be movable left and right on a wooden guide shaft 10.

Reference numeral 11 denotes a paper chute arranged to extend downward from the rear along the outer periphery of the platen 5, and this paper chute If winds the cut paper inserted from the cut paper insertion opening 3a around the platen 5. It is designed to be attached and guided to the printing section.

12a and 12b are pressure rollers arranged along this paper chute 11 so as to press it against the platen 5.

13 is a first tractor shaft rotatably supported by the left and right side frames 6a and 6b provided below the paper chute 11; 14 is a lower cover 2;
A bearing having a substantially half-moon-shaped groove formed in the lower cover 2 is provided in the portion 2a and the upper cover 3, and a bearing of the lower cover 2 having the same shape as the portion 2a is supported in the portion 3d and is located near the rear end of the printing device 1. is a second tractor shaft provided parallel to the first tractor shaft 13, and both tractor shafts 13, 14 have one key groove 13a in the axial direction.
, 14a are formed over almost the entire shaft, and a gear 1 is provided at one end of the first tractor shaft 13.
5 is attached.

16 is a post provided on the side frame 6a, 17 is an idle gear rotatably attached to the end of the post 16, and this idle gear I7 is provided on the platen gear 7 and the first tractor shaft 13. The platen 5 and the first tractor shaft 13 are rotated synchronously.

Reference numeral 18 denotes a tractor pulley which is rotatably attached to one end of the two-wood tractor shaft 13 and 14 on the printing reference position side of the printing device 1, and the inner diameter of the tractor pulley 18 has a groove facing inward. The protrusion 18a
By engaging this protrusion 18a with the keyways 13a and 14a of the two tractor shirts 13.14, the tractor pulley 18 moves over both the tractor shafts 13.14. Both tractor shafts 13.1 can be moved in the axial direction and in the rotational direction.
It is supported so as to rotate in synchronization with 4.

Reference numeral 19 denotes a paper feed tractor, and this paper feed tractor 19 has pins 20a at equal intervals around the outer circumference that engage with holes 4a formed in the edge of the continuous paper 4, and the two tractor pulleys 18 The hook consists of an endless tractor belt 20 and tractor frames 21a and 21b that support both sides of the tractor belt 20 and prevent it from falling off the tractor pulley 18. It is formed to be rotatable around the side end portion on the 5 side.

In order to prevent the hole 4a at the edge of the continuous paper 4 from coming off from the bin 20a of the tractor belt 20, the lower cover 22 has a certain gap with the lower side of the paper feed tractor 19, and the lower cover 22 is attached along this gap. This is a paper guide provided in the paper guide, and is movable in the axial direction of the tractor shaft 13 or 14 in synchronization with the paper feed tractor 19.

23 is a pin wheel attached to the other ends of the two tractor shafts 13 and 14, and this pin wheel 23 is connected to the tractor pulley 18 by the tractor belt 20.
It has a pin 23a having the same outer diameter as the outer diameter of the portion wrapped around the tractor belt 20 and the same spacing as the pin 20a of the tractor belt 20, and a protruding portion 23b formed protruding from the inner diameter similarly to the tractor pulley 18. are engaged with the keyways 13a and 14a, and the first and second tractor shirt eyes 3 and 14 are
The upper part is movable in the axial direction, and the support is rotatable in synchronization with the shaft.

Note that the pin 23a of the pin wheel 23 and the pin 20a of the tractor belt 20 are out of phase.

24 is a pin wheel 23 similar to the paper guide 22.
A paper guide is provided corresponding to the paper guide, and is movable in the axial direction of the tractor shaft 13 or 14.

25 is a pair of guide wheels arranged between the paper feed tractor 19 and the pin wheel 23, and 26 is a paper guide provided corresponding to the guide wheels 25.

A guide plate 27 is provided between the first tractor shaft 13 and the second tractor shaft 14 and serves as an upper guide when the continuous paper 4 travels.

Next, the operation of the above-described structure will be explained with reference to FIG. 4.

FIG. 4 is a perspective view of a printing device showing the effect of the present invention;
Similarly to FIGS. 1 and 2, FIG. 4 is also a view seen from the rear of the apparatus.

First, the paper feed tractor 19 is moved in the axial direction of the tractor shafts 13 and 14 in accordance with the printing start position of the continuous paper 4 to be used to determine the reference position, and the other pinwheel is moved in accordance with the width of the continuous paper 4 to be used. 23 and position it.

In the case of normal printing, the horizontal position adjustment range amount at this time is 3 inches of the paper feed tractor 19 on the printing position reference side.

Next, as shown in FIG. 4, by rotating the paper feed tractor 19 upward around the end on the platen 5 side, the second tractor shaft 14 is moved to the bearing portions 2a and 3d.
Lift it up and lock it in line with the groove in the paper feed tractor 1.
9. The distance between the pin wheel 23, the guide wheel 25, and the three paper guides 22, 24, and 26 is widened, and an opening is opened so that the continuous paper 4 can be inserted.

Then, the continuous paper 4 for printing is inserted through this opened gap, and the second tractor shaft 14 is lowered so that the edge-side hole 4a of the continuous paper 4 is engaged with the bin 20a of the tractor belt 20. This causes the plurality of pins 20a of the tractor belt 20 and the holes 4a on one side of the continuous paper 4 to
As a result, the continuous paper 4 becomes parallel to the paper feed tractor 19, so that the bin 23a and the hole 4a on the other side of the continuous paper 4 are engaged without the bin wheel 23 being aware of this.

After setting the continuous paper 4 in this manner, when the platen 5 is rotated by driving a motor (not shown), the rotational force of the platen gear 7 provided at one end of the platen 5 is transmitted to the gear 15 via the idle gear 17. Then, the paper feed tractor 19 is rotated.

As a result, the continuous paper 4 travels in the direction of the platen 5, is sent between the platen 5 and the print head, and is ready to start printing.

When removing the continuous paper 4, a motor (not shown) is driven to rotate in the opposite direction to the direction of insertion, thereby rotating the paper feed tractor 19 in the opposite direction and causing the continuous paper 4 to travel in the opposite direction. , thereby discharging it to the outside of the device.

Further, FIG. 5 is a perspective view of a printing device showing another embodiment of the present invention.

As seen in this figure, in this embodiment, the first tractor shaft 13 in the previously described embodiment is also used as the shafts 5a and 5b provided at both ends of the platen 5, and the other configurations are as follows. is almost the same as the first embodiment, and according to the second embodiment, the number of parts is reduced and further miniaturization can be realized.

〔Effect of the invention〕

As explained above, according to the present invention, there is provided a paper feeding tractor having a tractor belt provided with a pin that engages with a hole on one side edge of the paper, two pulleys around which the tractor belt is wound, and A paper feeding mechanism is constituted by a pin wheel having a pin that engages with the hole at the other end, and
The paper feed tractor and the bin wheel are exposed outside the upper cover at the rear of the apparatus, and are rotatable about the end of the paper feed tractor on the platen side.

This eliminates the need to place the control system on the front side of the platen and increase the volume on the front side of the platen as in the past, and even if the platen is placed at the rear, the paper feed tractor is only provided in one example. It became possible to obtain space to install the control system mechanism, and it became possible to downsize the fruiting device.

In addition, according to this embodiment, paper can be loaded without releasing the upper cover, which not only simplifies the handling work when loading or removing the paper, but also allows the paper to be loaded without releasing the upper cover. This eliminates the need to mold the cover into several pieces and then connect them together, which reduces noise during equipment operation and allows for a cleaner appearance. becomes.

[Brief explanation of the drawing]

1 is an external perspective view showing a first embodiment of the printing device of the present invention, FIG. 2 is a perspective view showing the internal mechanism of the printing device of FIG. 1, and FIG. 3 is an illustration of the printing device of the present invention. FIG. 4 is a side sectional view showing the embodiment, FIG. 4 is a perspective view showing the operation of one embodiment, and FIG. 5 is a perspective view showing the internal mechanism of another embodiment. 1...Printing device 2...Lower cover 3...
- Ashibaka hood 5 Platen 13...First tractor shaft 13a, 14a...Keyway 14...Second tractor shaft 18...Tractor pulley 19...Paper feed tractor 20a...Pin 20 Tractor Belt 22.
24.26...Paper guide 27...Guide plate patent applicant: Oki Electric Industry Co., Ltd. Agent: Patent attorney: Kyoji Kanakura

Claims (1)

[Scope of Claims] 1. A platen that wraps and supports a sheet of paper with continuous holes formed at regular intervals on both sides, a print head that prints on this platen, and a print head that engages with the holes formed in the sheet of paper. A printing device having a paper feeding mechanism in which a plurality of mating pins are protruded at predetermined intervals and feeds the paper from the rear of the device opposite to the print head across a platen, and an upper cover that covers the rear upper part of the device, a paper feed tractor comprising an endless tractor belt provided with a pin for engaging the paper feed mechanism with a hole on one side edge of the paper; and two pulleys around which the tractor belt is wound; and a pin wheel having a pin that engages with the hole, and the paper feed tractor and the pin wheel are exposed outside the upper cover at the rear of the device, and the paper feed tractor rotates around the platen side end. A printing device characterized by being able to move.