JPH0425343Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention uses a pin belt for continuous paper (perforation) with perforation holes in the side edges of the paper feeding device of a printer. The present invention relates to a paper feeding device for a printer that conveys paper by rotation of the printer.

[Prior Art] FIG. 8 shows a conventional example of a paper feeding device for this type of printer, which is shown in Japanese Utility Model Application Publication No. 175457/1983.

In the figure, A is a drive shaft, B is a support shaft, C is a paper feeding device attached to these driving shafts A and support shaft B, D is a block body forming the outer shell of this paper feeding device C, and E is this paper feeding device. A pin belt provided on the block body D and rotationally driven by the drive shaft A, F a cover that is pivotally supported on the outer surface of the block body D and opens and closes the pin belt E, and G a cover that is conveyed by the paper feeding device. Recording paper (continuous paper) with sprocket holes _G1 on both side edges is shown.

When transporting the recording paper G using the paper feeding device C, first open the cover F to open the supply port for the recording paper G (although FIG. 8 shows one cover F in an open state, Actually, open both covers F). Next, the starting end of the recording paper G is pulled out to the position of the pin belt E, and its feed hole G ₁ is engaged with a pin E ₁ protruding from the outer peripheral surface of the pin belt E.
Thereafter, when the open cover F is closed and the pin belt E is rotated, the recording paper G is conveyed to a printing section (not shown). In this case, since the recording paper G is prevented from rising by the cover F, reliable paper feeding is performed.

[Problem that the invention attempts to solve]

By the way, in the paper feeding device of the printer mentioned above, the cover F is designed to open on both sides in the width direction of the recording paper G, so when the recording paper G is attached to the paper feeding device C, The operator's fingers while holding both side edges hit the open cover F, making the installation process difficult. Of course, it is also possible to carry out the above mounting operation by holding the inside of the sprocket hole _G1 on the recording paper G, but if you do this, your fingers will move away from the sprocket hole _G1 , so the sprocket hole _G1 can be attached to the pin _E1. In any case, there was a problem in that the recording paper G was not easy to attach. In addition, in this conventional paper feeding device, when the cover F is opened and the recording paper (fan hold paper) G is loaded, the upper part of the pin belt E is completely opened, so the starting end of the recording paper G (the perforation There is no way to symmetrically align the sprocket holes (feeding holes or perforations) on the left and right sides of the paper by abutting the paper's left and right sprocket holes, so inexperienced operators may have to shift the engagement positions on the left and right sides of the paper to install the paper. There was a risk that he might do it. moreover,
As in the conventional paper feeding device, the cover F is used for the recording paper G.
In a configuration that opens outward, in order to improve the ease of mounting the recording paper G, the cover F is rotated outward (rotated 180 degrees) until it becomes horizontal.
It became necessary to secure a space for this escape, and there was also the problem that miniaturization of the printer was hindered.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the problems of the prior art described above and to provide a paper feeding device for a printer that allows easy installation of continuous paper (recording paper).

[Means for solving problems]

In order to achieve the above object, the present invention includes a pin belt having a large number of pins on the outer circumferential surface, a cover disposed above the pin belt so as to be openable and closable, and a sprocket hole provided in the side edge. In a paper feeding device for a printer that conveys continuous paper in a rotational direction of a pin belt with its feeding hole engaged with the pin, the rotation support shaft of the cover is arranged such that its axial direction is orthogonal to the conveyance direction of the continuous paper. At the same time, this cover is arranged on the upper surface of the frame of the pin belt tractor mechanism on the upstream side in the paper feeding direction,
When the cover is open, only the upper surface of the pin belt on the upstream side in the paper feeding direction is exposed.

[Effect]

With the above configuration, the cover is opened in the transport direction of the continuous paper, so when engaging the feed hole of the continuous paper with the pin of the pin belt, the cover will get in the way even if you hold both edges of the continuous paper with your hands. This improves the ease of attaching continuous paper. Furthermore, when loading continuous paper (fan-hold paper), by touching the starting end (perforation cut part) of the continuous paper to the upper end of the frame of the left and right pin belt tractor mechanism or the open cover, the left and right sprockets of the paper can be attached. Symmetrical alignment of holes (perforation) becomes easy and reliable.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 is an exploded perspective view of the left paper feeding device of the paper feeding device according to the present invention, in which 1 is a slide block, 2 is a main sprocket wheel, and 3 is a
is the sub sprocket wheel, 4 is the pin belt,
5 is an outer plate, 6 is a fixed cover, 7 is a movable cover,
8 indicates a micro switch. As shown in FIGS. 1 and 2, the slide block 1 includes a paper feed table 9, a paper pressing plate 10, a side plate 11, a mounting portion 12, a bearing plate 13, the outer plate 5, and a fixed cover. 6, a locking plate 15 for locking the fixed cover 6, a positioning plate 16 for regulating the set position of the outer plate 5, a mounting rod 17 for mounting the micro switch 8, and a locking piece. 18 are integrally formed. As shown in FIG. 3, the paper feed table 9 and the paper pressing plate 10 are formed parallel to each other with a paper groove 19 having a width sufficient to insert the recording paper therebetween. Reference numeral 20 denotes a slope formed on the paper feed side of the paper holding plate 10, and forms a wide paper feed port 21 that continues to the paper groove 19 between the paper press plate 10 and the paper feed table 9. A shaft hole 22 for the main sprocket wheel 2 is provided on the side plate 11 side of the mounting portion 12, and an insertion hole 23 through which a sprocket drive shaft (to be described later) is inserted is provided on the outer plate 12a side of the mounting portion 12. It will be established on the same axis as A shaft hole 24 for the sub-sprocket wheel 3 is formed in the bearing plate 13 .
The mounting rod 14 and the locking piece are provided on the outer surface of the side plate 11 so as to protrude in parallel with each other at a required interval.
The positioning plate 16 is formed to be slightly wider than the width D of the pin belt 4. Mounting rods 17 for mounting the micro switch 8 are provided in parallel with each other on the inner surface of the side plate 11 at equal intervals to the mounting holes 25 formed in the micro switch 8. Reference numeral 26 indicates a locking step formed on the mounting rod 17. A locking piece 18 that locks the micro switch 8 is attached to the mounting rod 1 at an interval equal to the width W of the micro switch 8.
They are provided on both sides of 7 in a protruding manner parallel to this. code 27
28 is a switch groove from which the actuator 8a of the micro switch 8 protrudes, which is cut out in the paper feed table 9. Also, reference numeral 28 indicates a part of the paper feed roller, which will be described later, on the paper feed table 9.
This is a roller groove that protrudes from the top surface of the roller.

The main sprocket wheel 2 has rotary shafts 2a and 2b coaxially protruding from both sides thereof, and a square hole 29 is formed in the rotary shafts 2a and 2b through which a drive shaft (to be described later) passes.

A paper feed roller 30 is integrally fixed to one side of the sub sprocket wheel 3, and rotating shafts 3a and 3b are coaxially attached to the side surface of the paper feed roller 30 and the side surface of the sub sprocket wheel 3, respectively. It is installed protrudingly. Reference numeral 31 indicates a knurling formed on the surface of the paper feed roller 30.

The pin belt 4 has protrusions 4a projected at equal intervals on its inner circumferential surface to engage with the sprocket wheels 2 and 3, and its outer circumferential surface has feed holes provided on both sides of the recording paper to be supplied to the printer. Pins 4b are provided protrudingly at equal intervals.

The outer plate 5 has a through hole 3 through which a mounting rod 14 protruding from the side plate 11 of the slide block 1 passes.
2. A through hole 33 through which the locking piece 15 protruding from the side plate 11 of the slide block 1 is passed through, a shaft hole 34 that pivotally supports the rotating shaft 2b of the main sprocket wheel 2, and the sub sprocket. The shaft hole 35 that supports the rotating shaft 3b of the wheel 3 is
Each will be established at the required location.

The fixed cover 6 is attached to the horizontal plate 3 as shown in FIG.
6 and a side plate 37, and a mounting rod 14 is provided on the side plate 37 to protrude from the side plate 11 of the slide block 1.
A keyhole 39 is provided in which the locking piece 15 protruding from the side plate 11 of the slide block 1 is engaged. As shown in FIG. 5, the keyhole 39 has a surface 39a that engages with the engagement surface 15a of the locking piece 15, which is formed as a sloped surface having the same slope as the engagement surface 15a. The code 40 is the horizontal plate 36
It shows the ribs protruding from the lower surface of the . Said rib 40
In this case, this fixed cover 6 is attached to the slide block 1.
When the microswitch 8 is attached to the microswitch 8, the actuator 8a of the microswitch 8 is positioned between two adjacent ribs 40, 40. Reference numeral 41 designates a mounting block for a movable cover, which will be described later, and has a shaft hole 42 penetrating left and right, a flat portion 43 on the front edge, and an engagement step 44 on the lower edge. Reference numeral 45 indicates an escape groove of the movable cover 7, which will be described later.

As shown in FIG. 6, the base end of the movable cover 7 is fitted into the relief groove 45 of the fixed cover 6,
A connecting portion 4 pivotally supported by the movable cover mounting portion 41
6, and an engaging element 47 extending from the lower surface of the movable cover 7 on the outer surface thereof. Reference numeral 48 denotes a rib protruding from the lower surface of the movable cover 7.
is formed at a position where it is connected to a rib 40 protruding from the lower surface of the horizontal plate 36 when it is attached to the fixed cover 6 .

Next, a method of assembling the paper feeding device composed of the above-mentioned members will be explained.

The rotating shaft 2 of the main sprocket wheel 2 is inserted into the shaft hole 22 formed in the mounting part 12 of the tractor body 1.
a, and the bearing plate 1 of the tractor body 1.
The rotating shaft 3a of the sub sprocket wheel 3 is fitted into the shaft hole 24 formed in the sprocket wheel 3. Subsequently, the pin belt 4 is mounted on the main sprocket wheel 2 and the sub sprocket wheel 3 set on the tractor main body 1 as described above. continue,
A mounting rod 1 protruding from the side plate 11 of the tractor body 1
4 is fitted into the through hole 32 formed in the outer plate 5, and the rotating shaft 2b of the main sprocket wheel 2 is fitted into the shaft hole 34 formed in the outer plate 5. The rotating shaft 3b of No. 3 is fitted into the shaft hole 35 formed in the outer plate 5. Finally, the through hole 38 of the fixed cover 6, on which the movable cover 7 is rotatably mounted in advance, is fitted into the mounting rod 14 protruding outward from the outer plate 5, and further, against the elasticity of the locking piece 15, Press the tractor body 1 side to engage the engaging surface 15a of the locking piece 15 in the keyhole 39.

Although a detailed explanation will be omitted, the right paper feed device is also formed in the same manner as the left paper feed device described above, except that a micro switch is not set.

As shown in FIG. 7, the pair of left and right paper feeding devices assembled as described above has a main sprocket wheel 2 mounted on a drive shaft 50 bridged over a frame 49.
By slidably mounting the slide block 1 and inserting a support piece (not shown) protruding from the tip of the slide block 1 into the support groove 51 formed in the frame 49,
It is set at a predetermined position on the printing device 53.

When transporting the recording paper 52 with the feed holes 52a in the side edges using the paper feeding device of the printer configured in this way, the left and right movable covers 7 are opened as shown in FIG. The supply port 52 is opened. In this case, the movable cover 7 is connected to the drive shaft 50
The connecting portions 46 extending parallel to the two are opened in the conveying direction of the recording paper 52 as rotational shafts, and the engaging element 47 formed on the movable cover 7 is attached to the flat portion 43 formed on the movable cover mounting portion 41 of the fixed cover 6. engaged,
It is held by the elasticity of the engaging element 47. Next, holding both edges of the recording paper 52 by hand, pull out the starting end of the grip to the position of the pin belt 4, and engage the feed hole 52a with the pin 4b of the pin belt 4. Next, when the opened movable cover 7 is closed and the pin belt 4 is rotated, the recording paper 52 is appropriately transferred to the printing device 53 side. In this case, the movable cover 7 is held by the engagement element 47 formed on the movable cover 7 being engaged with the engagement step 44 formed on the movable cover attachment part 41 of the fixed cover 6, and being held by the elasticity of the engagement element 47. As a result, the recording paper 52 that is in contact with the lower surface of the movable cover 7 and the rib 40 protruding from the movable cover 7
The paper can be fed reliably without lifting up. Further, in this case, since the recording paper 52 is placed on the upper surface of the paper pressing plate 10, it does not interfere with the paper feed roller 30, and paper folding and paper jamming do not occur.

Recording paper without sprocket holes (not shown)
When transferring paper, use the paper feed table 9 and paper holding plate 10
When the end of the paper is inserted through the paper feed port 21 formed between the two, the recording paper is aligned by the paper groove 19.
The paper is transferred to the printing device 53 by the paper feed roller 30 and a pinch roller (not shown). In this case, since the recording paper is inserted into the paper groove 19, it does not interfere with the pin belt 4, and paper folds and paper jams do not occur.

[Effect of idea]

As detailed above, according to the present invention, the cover is designed to open in the conveying direction of the continuous paper, so when the feed hole at the starting end of the continuous paper is engaged with the pin of the pin belt, the cover is opened. It is possible to provide a paper feeding device for a printer that does not get in the way and is easy to install. Also, when loading continuous paper (fan-hold paper), the starting end (perforation cut part) of the continuous paper should be brought into contact with the top end of the fixed cover 6 of the left and right pin belt tractor mechanisms or the open movable cover 7. This makes it easy and reliable to align the sprocket holes (perforations) on the left and right sides of the paper symmetrically. In addition, since the cover opens and closes to expose only about half of the top surface of the pin belt, even if the cover is opened and closed in the paper transport direction, the movement (rotation) trajectory space of the cover is small, so other There is also less risk of interference with component arrangement. moreover,
In the conventional example shown in Fig. 8, in which the left and right covers open outward from the paper, in order to improve the ease of attaching continuous paper, the cover is rotated outward until it becomes horizontal (180 degree rotation). ),
Although it is necessary to secure space for this escape, the present invention allows the left and right pin tractor mechanisms to be brought as close as possible to the left and right printer side frames, which can also contribute to downsizing the printer as a whole. .

[Brief explanation of drawings]

1 to 7 illustrate a paper feeding device for a printer according to an embodiment of the present invention, FIG. 1 is an exploded perspective view of the paper feeding device, and FIG. 2 is a combination of a tractor main body and a micro switch. An exploded perspective view showing
Figure 3 is a side view of the slide block, Figure 4 is a front view of the fixed cover, Figure 5 is a sectional view of the keyhole of the fixed cover, Figure 6 is a side view of the movable cover, and Figure 7 is the paper feed. FIG. 8 is a perspective view of a conventional paper feeding device. 1...Tractor body, 2...Main sprocket wheel, 3...Sub sprocket wheel,
4... Pin belt, 4b... Pin, 6... Fixed cover, 7... Movable cover (cover), 42... Shaft hole, 46... Connection part, 47... Engagement element, 50...
Drive shaft, 52...Recording paper (continuous paper), 52a...
...feeding hole.

Claims (1)

[Scope of utility model registration request] A pin belt having a large number of pins on the outer circumferential surface, and a cover disposed above the pin belt so as to be openable and closable, and the continuous paper having a feed hole formed in the side edge thereof is engaged with the pin. In a paper feeding device for a printer that conveys continuous paper in the rotational direction of a pin belt, the cover is arranged such that the pivot shaft of the cover is perpendicular to the conveyance direction of the continuous paper, and the cover is transported by a pin belt tractor. It is disposed on the upstream side of the upper surface of the frame of the mechanism in the paper feeding direction, and when the cover is open, only the upper surface of the pin belt on the upstream side in the paper feeding direction is exposed, and when the cover is open, the upper end surface of the frame or the upper end surface of the frame is exposed. A paper feed device for a printer, characterized in that the starting end of the continuous paper sheet can be brought into contact with the cover that is attached to the cover.